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-rw-r--r--src/feature/control/control.c7544
1 files changed, 127 insertions, 7417 deletions
diff --git a/src/feature/control/control.c b/src/feature/control/control.c
index 26ac12d307..ee1026359d 100644
--- a/src/feature/control/control.c
+++ b/src/feature/control/control.c
@@ -1,6 +1,5 @@
-
/* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2019, The Tor Project, Inc. */
+ * Copyright (c) 2007-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
@@ -33,83 +32,27 @@
* stack.
**/
+#define CONTROL_MODULE_PRIVATE
#define CONTROL_PRIVATE
#include "core/or/or.h"
#include "app/config/config.h"
-#include "app/config/confparse.h"
#include "app/main/main.h"
#include "core/mainloop/connection.h"
#include "core/mainloop/mainloop.h"
-#include "core/or/channel.h"
-#include "core/or/channeltls.h"
-#include "core/or/circuitbuild.h"
-#include "core/or/circuitlist.h"
-#include "core/or/circuitstats.h"
-#include "core/or/circuituse.h"
-#include "core/or/command.h"
-#include "core/or/connection_edge.h"
#include "core/or/connection_or.h"
-#include "core/or/policies.h"
-#include "core/or/reasons.h"
-#include "core/or/versions.h"
#include "core/proto/proto_control0.h"
#include "core/proto/proto_http.h"
-#include "feature/client/addressmap.h"
-#include "feature/client/bridges.h"
-#include "feature/client/dnsserv.h"
-#include "feature/client/entrynodes.h"
#include "feature/control/control.h"
-#include "feature/control/fmt_serverstatus.h"
-#include "feature/control/getinfo_geoip.h"
-#include "feature/dircache/dirserv.h"
-#include "feature/dirclient/dirclient.h"
-#include "feature/dirclient/dlstatus.h"
-#include "feature/dircommon/directory.h"
-#include "feature/hibernate/hibernate.h"
-#include "feature/hs/hs_cache.h"
-#include "feature/hs/hs_common.h"
-#include "feature/hs/hs_control.h"
-#include "feature/hs_common/shared_random_client.h"
-#include "feature/nodelist/authcert.h"
-#include "feature/nodelist/dirlist.h"
-#include "feature/nodelist/microdesc.h"
-#include "feature/nodelist/networkstatus.h"
-#include "feature/nodelist/nodelist.h"
-#include "feature/nodelist/routerinfo.h"
-#include "feature/nodelist/routerlist.h"
-#include "feature/relay/router.h"
-#include "feature/relay/routermode.h"
-#include "feature/relay/selftest.h"
-#include "feature/rend/rendclient.h"
+#include "feature/control/control_auth.h"
+#include "feature/control/control_cmd.h"
+#include "feature/control/control_events.h"
+#include "feature/control/control_proto.h"
#include "feature/rend/rendcommon.h"
-#include "feature/rend/rendparse.h"
#include "feature/rend/rendservice.h"
-#include "feature/stats/geoip_stats.h"
-#include "feature/stats/predict_ports.h"
-#include "lib/container/buffers.h"
-#include "lib/crypt_ops/crypto_rand.h"
-#include "lib/crypt_ops/crypto_util.h"
-#include "lib/encoding/confline.h"
-#include "lib/evloop/compat_libevent.h"
+#include "lib/evloop/procmon.h"
-#include "feature/dircache/cached_dir_st.h"
#include "feature/control/control_connection_st.h"
-#include "core/or/cpath_build_state_st.h"
-#include "core/or/entry_connection_st.h"
-#include "feature/nodelist/extrainfo_st.h"
-#include "feature/nodelist/networkstatus_st.h"
-#include "feature/nodelist/node_st.h"
-#include "core/or/or_connection_st.h"
-#include "core/or/or_circuit_st.h"
-#include "core/or/origin_circuit_st.h"
-#include "feature/nodelist/microdesc_st.h"
-#include "feature/rend/rend_authorized_client_st.h"
-#include "feature/rend/rend_encoded_v2_service_descriptor_st.h"
-#include "feature/rend/rend_service_descriptor_st.h"
-#include "feature/nodelist/routerinfo_st.h"
-#include "feature/nodelist/routerlist_st.h"
-#include "core/or/socks_request_st.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
@@ -118,152 +61,6 @@
#include <sys/stat.h>
#endif
-#ifndef _WIN32
-#include <pwd.h>
-#include <sys/resource.h>
-#endif
-
-#include "lib/crypt_ops/crypto_s2k.h"
-#include "lib/evloop/procmon.h"
-#include "lib/evloop/compat_libevent.h"
-
-/** Yield true iff <b>s</b> is the state of a control_connection_t that has
- * finished authentication and is accepting commands. */
-#define STATE_IS_OPEN(s) ((s) == CONTROL_CONN_STATE_OPEN)
-
-/** Bitfield: The bit 1&lt;&lt;e is set if <b>any</b> open control
- * connection is interested in events of type <b>e</b>. We use this
- * so that we can decide to skip generating event messages that nobody
- * has interest in without having to walk over the global connection
- * list to find out.
- **/
-typedef uint64_t event_mask_t;
-
-/** An event mask of all the events that any controller is interested in
- * receiving. */
-static event_mask_t global_event_mask = 0;
-
-/** True iff we have disabled log messages from being sent to the controller */
-static int disable_log_messages = 0;
-
-/** Macro: true if any control connection is interested in events of type
- * <b>e</b>. */
-#define EVENT_IS_INTERESTING(e) \
- (!! (global_event_mask & EVENT_MASK_(e)))
-
-/** Macro: true if any event from the bitfield 'e' is interesting. */
-#define ANY_EVENT_IS_INTERESTING(e) \
- (!! (global_event_mask & (e)))
-
-/** If we're using cookie-type authentication, how long should our cookies be?
- */
-#define AUTHENTICATION_COOKIE_LEN 32
-
-/** If true, we've set authentication_cookie to a secret code and
- * stored it to disk. */
-static int authentication_cookie_is_set = 0;
-/** If authentication_cookie_is_set, a secret cookie that we've stored to disk
- * and which we're using to authenticate controllers. (If the controller can
- * read it off disk, it has permission to connect.) */
-static uint8_t *authentication_cookie = NULL;
-
-#define SAFECOOKIE_SERVER_TO_CONTROLLER_CONSTANT \
- "Tor safe cookie authentication server-to-controller hash"
-#define SAFECOOKIE_CONTROLLER_TO_SERVER_CONSTANT \
- "Tor safe cookie authentication controller-to-server hash"
-#define SAFECOOKIE_SERVER_NONCE_LEN DIGEST256_LEN
-
-/** The list of onion services that have been added via ADD_ONION that do not
- * belong to any particular control connection.
- */
-static smartlist_t *detached_onion_services = NULL;
-
-/** A sufficiently large size to record the last bootstrap phase string. */
-#define BOOTSTRAP_MSG_LEN 1024
-
-/** What was the last bootstrap phase message we sent? We keep track
- * of this so we can respond to getinfo status/bootstrap-phase queries. */
-static char last_sent_bootstrap_message[BOOTSTRAP_MSG_LEN];
-
-static void connection_printf_to_buf(control_connection_t *conn,
- const char *format, ...)
- CHECK_PRINTF(2,3);
-static void send_control_event_impl(uint16_t event,
- const char *format, va_list ap)
- CHECK_PRINTF(2,0);
-static int control_event_status(int type, int severity, const char *format,
- va_list args)
- CHECK_PRINTF(3,0);
-
-static void send_control_done(control_connection_t *conn);
-static void send_control_event(uint16_t event,
- const char *format, ...)
- CHECK_PRINTF(2,3);
-static int handle_control_setconf(control_connection_t *conn, uint32_t len,
- char *body);
-static int handle_control_resetconf(control_connection_t *conn, uint32_t len,
- char *body);
-static int handle_control_getconf(control_connection_t *conn, uint32_t len,
- const char *body);
-static int handle_control_loadconf(control_connection_t *conn, uint32_t len,
- const char *body);
-static int handle_control_setevents(control_connection_t *conn, uint32_t len,
- const char *body);
-static int handle_control_authenticate(control_connection_t *conn,
- uint32_t len,
- const char *body);
-static int handle_control_signal(control_connection_t *conn, uint32_t len,
- const char *body);
-static int handle_control_mapaddress(control_connection_t *conn, uint32_t len,
- const char *body);
-static char *list_getinfo_options(void);
-static int handle_control_getinfo(control_connection_t *conn, uint32_t len,
- const char *body);
-static int handle_control_extendcircuit(control_connection_t *conn,
- uint32_t len,
- const char *body);
-static int handle_control_setcircuitpurpose(control_connection_t *conn,
- uint32_t len, const char *body);
-static int handle_control_attachstream(control_connection_t *conn,
- uint32_t len,
- const char *body);
-static int handle_control_postdescriptor(control_connection_t *conn,
- uint32_t len,
- const char *body);
-static int handle_control_redirectstream(control_connection_t *conn,
- uint32_t len,
- const char *body);
-static int handle_control_closestream(control_connection_t *conn, uint32_t len,
- const char *body);
-static int handle_control_closecircuit(control_connection_t *conn,
- uint32_t len,
- const char *body);
-static int handle_control_resolve(control_connection_t *conn, uint32_t len,
- const char *body);
-static int handle_control_usefeature(control_connection_t *conn,
- uint32_t len,
- const char *body);
-static int handle_control_hsfetch(control_connection_t *conn, uint32_t len,
- const char *body);
-static int handle_control_hspost(control_connection_t *conn, uint32_t len,
- const char *body);
-static int handle_control_add_onion(control_connection_t *conn, uint32_t len,
- const char *body);
-static int handle_control_del_onion(control_connection_t *conn, uint32_t len,
- const char *body);
-static int write_stream_target_to_buf(entry_connection_t *conn, char *buf,
- size_t len);
-static void orconn_target_get_name(char *buf, size_t len,
- or_connection_t *conn);
-
-static int get_cached_network_liveness(void);
-static void set_cached_network_liveness(int liveness);
-
-static void flush_queued_events_cb(mainloop_event_t *event, void *arg);
-
-static char * download_status_to_string(const download_status_t *dl);
-static void control_get_bytes_rw_last_sec(uint64_t *r, uint64_t *w);
-
/** Convert a connection_t* to an control_connection_t*; assert if the cast is
* invalid. */
control_connection_t *
@@ -273,410 +70,6 @@ TO_CONTROL_CONN(connection_t *c)
return DOWNCAST(control_connection_t, c);
}
-/** Given a control event code for a message event, return the corresponding
- * log severity. */
-static inline int
-event_to_log_severity(int event)
-{
- switch (event) {
- case EVENT_DEBUG_MSG: return LOG_DEBUG;
- case EVENT_INFO_MSG: return LOG_INFO;
- case EVENT_NOTICE_MSG: return LOG_NOTICE;
- case EVENT_WARN_MSG: return LOG_WARN;
- case EVENT_ERR_MSG: return LOG_ERR;
- default: return -1;
- }
-}
-
-/** Given a log severity, return the corresponding control event code. */
-static inline int
-log_severity_to_event(int severity)
-{
- switch (severity) {
- case LOG_DEBUG: return EVENT_DEBUG_MSG;
- case LOG_INFO: return EVENT_INFO_MSG;
- case LOG_NOTICE: return EVENT_NOTICE_MSG;
- case LOG_WARN: return EVENT_WARN_MSG;
- case LOG_ERR: return EVENT_ERR_MSG;
- default: return -1;
- }
-}
-
-/** Helper: clear bandwidth counters of all origin circuits. */
-static void
-clear_circ_bw_fields(void)
-{
- origin_circuit_t *ocirc;
- SMARTLIST_FOREACH_BEGIN(circuit_get_global_list(), circuit_t *, circ) {
- if (!CIRCUIT_IS_ORIGIN(circ))
- continue;
- ocirc = TO_ORIGIN_CIRCUIT(circ);
- ocirc->n_written_circ_bw = ocirc->n_read_circ_bw = 0;
- ocirc->n_overhead_written_circ_bw = ocirc->n_overhead_read_circ_bw = 0;
- ocirc->n_delivered_written_circ_bw = ocirc->n_delivered_read_circ_bw = 0;
- }
- SMARTLIST_FOREACH_END(circ);
-}
-
-/** Set <b>global_event_mask*</b> to the bitwise OR of each live control
- * connection's event_mask field. */
-void
-control_update_global_event_mask(void)
-{
- smartlist_t *conns = get_connection_array();
- event_mask_t old_mask, new_mask;
- old_mask = global_event_mask;
- int any_old_per_sec_events = control_any_per_second_event_enabled();
-
- global_event_mask = 0;
- SMARTLIST_FOREACH(conns, connection_t *, _conn,
- {
- if (_conn->type == CONN_TYPE_CONTROL &&
- STATE_IS_OPEN(_conn->state)) {
- control_connection_t *conn = TO_CONTROL_CONN(_conn);
- global_event_mask |= conn->event_mask;
- }
- });
-
- new_mask = global_event_mask;
-
- /* Handle the aftermath. Set up the log callback to tell us only what
- * we want to hear...*/
- control_adjust_event_log_severity();
-
- /* Macro: true if ev was false before and is true now. */
-#define NEWLY_ENABLED(ev) \
- (! (old_mask & (ev)) && (new_mask & (ev)))
-
- /* ...then, if we've started logging stream or circ bw, clear the
- * appropriate fields. */
- if (NEWLY_ENABLED(EVENT_STREAM_BANDWIDTH_USED)) {
- SMARTLIST_FOREACH(conns, connection_t *, conn,
- {
- if (conn->type == CONN_TYPE_AP) {
- edge_connection_t *edge_conn = TO_EDGE_CONN(conn);
- edge_conn->n_written = edge_conn->n_read = 0;
- }
- });
- }
- if (NEWLY_ENABLED(EVENT_CIRC_BANDWIDTH_USED)) {
- clear_circ_bw_fields();
- }
- if (NEWLY_ENABLED(EVENT_BANDWIDTH_USED)) {
- uint64_t r, w;
- control_get_bytes_rw_last_sec(&r, &w);
- }
- if (any_old_per_sec_events != control_any_per_second_event_enabled()) {
- reschedule_per_second_timer();
- }
-
-#undef NEWLY_ENABLED
-}
-
-/** Adjust the log severities that result in control_event_logmsg being called
- * to match the severity of log messages that any controllers are interested
- * in. */
-void
-control_adjust_event_log_severity(void)
-{
- int i;
- int min_log_event=EVENT_ERR_MSG, max_log_event=EVENT_DEBUG_MSG;
-
- for (i = EVENT_DEBUG_MSG; i <= EVENT_ERR_MSG; ++i) {
- if (EVENT_IS_INTERESTING(i)) {
- min_log_event = i;
- break;
- }
- }
- for (i = EVENT_ERR_MSG; i >= EVENT_DEBUG_MSG; --i) {
- if (EVENT_IS_INTERESTING(i)) {
- max_log_event = i;
- break;
- }
- }
- if (EVENT_IS_INTERESTING(EVENT_STATUS_GENERAL)) {
- if (min_log_event > EVENT_NOTICE_MSG)
- min_log_event = EVENT_NOTICE_MSG;
- if (max_log_event < EVENT_ERR_MSG)
- max_log_event = EVENT_ERR_MSG;
- }
- if (min_log_event <= max_log_event)
- change_callback_log_severity(event_to_log_severity(min_log_event),
- event_to_log_severity(max_log_event),
- control_event_logmsg);
- else
- change_callback_log_severity(LOG_ERR, LOG_ERR,
- control_event_logmsg);
-}
-
-/** Return true iff the event with code <b>c</b> is being sent to any current
- * control connection. This is useful if the amount of work needed to prepare
- * to call the appropriate control_event_...() function is high.
- */
-int
-control_event_is_interesting(int event)
-{
- return EVENT_IS_INTERESTING(event);
-}
-
-/** Return true if any event that needs to fire once a second is enabled. */
-int
-control_any_per_second_event_enabled(void)
-{
- return ANY_EVENT_IS_INTERESTING(
- EVENT_MASK_(EVENT_BANDWIDTH_USED) |
- EVENT_MASK_(EVENT_CELL_STATS) |
- EVENT_MASK_(EVENT_CIRC_BANDWIDTH_USED) |
- EVENT_MASK_(EVENT_CONN_BW) |
- EVENT_MASK_(EVENT_STREAM_BANDWIDTH_USED)
- );
-}
-
-/* The value of 'get_bytes_read()' the previous time that
- * control_get_bytes_rw_last_sec() as called. */
-static uint64_t stats_prev_n_read = 0;
-/* The value of 'get_bytes_written()' the previous time that
- * control_get_bytes_rw_last_sec() as called. */
-static uint64_t stats_prev_n_written = 0;
-
-/**
- * Set <b>n_read</b> and <b>n_written</b> to the total number of bytes read
- * and written by Tor since the last call to this function.
- *
- * Call this only from the main thread.
- */
-static void
-control_get_bytes_rw_last_sec(uint64_t *n_read,
- uint64_t *n_written)
-{
- const uint64_t stats_n_bytes_read = get_bytes_read();
- const uint64_t stats_n_bytes_written = get_bytes_written();
-
- *n_read = stats_n_bytes_read - stats_prev_n_read;
- *n_written = stats_n_bytes_written - stats_prev_n_written;
- stats_prev_n_read = stats_n_bytes_read;
- stats_prev_n_written = stats_n_bytes_written;
-}
-
-/**
- * Run all the controller events (if any) that are scheduled to trigger once
- * per second.
- */
-void
-control_per_second_events(void)
-{
- if (!control_any_per_second_event_enabled())
- return;
-
- uint64_t bytes_read, bytes_written;
- control_get_bytes_rw_last_sec(&bytes_read, &bytes_written);
- control_event_bandwidth_used((uint32_t)bytes_read,(uint32_t)bytes_written);
-
- control_event_stream_bandwidth_used();
- control_event_conn_bandwidth_used();
- control_event_circ_bandwidth_used();
- control_event_circuit_cell_stats();
-}
-
-/** Append a NUL-terminated string <b>s</b> to the end of
- * <b>conn</b>-\>outbuf.
- */
-static inline void
-connection_write_str_to_buf(const char *s, control_connection_t *conn)
-{
- size_t len = strlen(s);
- connection_buf_add(s, len, TO_CONN(conn));
-}
-
-/** Given a <b>len</b>-character string in <b>data</b>, made of lines
- * terminated by CRLF, allocate a new string in *<b>out</b>, and copy the
- * contents of <b>data</b> into *<b>out</b>, adding a period before any period
- * that appears at the start of a line, and adding a period-CRLF line at
- * the end. Replace all LF characters sequences with CRLF. Return the number
- * of bytes in *<b>out</b>.
- */
-STATIC size_t
-write_escaped_data(const char *data, size_t len, char **out)
-{
- tor_assert(len < SIZE_MAX - 9);
- size_t sz_out = len+8+1;
- char *outp;
- const char *start = data, *end;
- size_t i;
- int start_of_line;
- for (i=0; i < len; ++i) {
- if (data[i] == '\n') {
- sz_out += 2; /* Maybe add a CR; maybe add a dot. */
- if (sz_out >= SIZE_T_CEILING) {
- log_warn(LD_BUG, "Input to write_escaped_data was too long");
- *out = tor_strdup(".\r\n");
- return 3;
- }
- }
- }
- *out = outp = tor_malloc(sz_out);
- end = data+len;
- start_of_line = 1;
- while (data < end) {
- if (*data == '\n') {
- if (data > start && data[-1] != '\r')
- *outp++ = '\r';
- start_of_line = 1;
- } else if (*data == '.') {
- if (start_of_line) {
- start_of_line = 0;
- *outp++ = '.';
- }
- } else {
- start_of_line = 0;
- }
- *outp++ = *data++;
- }
- if (outp < *out+2 || fast_memcmp(outp-2, "\r\n", 2)) {
- *outp++ = '\r';
- *outp++ = '\n';
- }
- *outp++ = '.';
- *outp++ = '\r';
- *outp++ = '\n';
- *outp = '\0'; /* NUL-terminate just in case. */
- tor_assert(outp >= *out);
- tor_assert((size_t)(outp - *out) <= sz_out);
- return outp - *out;
-}
-
-/** Given a <b>len</b>-character string in <b>data</b>, made of lines
- * terminated by CRLF, allocate a new string in *<b>out</b>, and copy
- * the contents of <b>data</b> into *<b>out</b>, removing any period
- * that appears at the start of a line, and replacing all CRLF sequences
- * with LF. Return the number of
- * bytes in *<b>out</b>. */
-STATIC size_t
-read_escaped_data(const char *data, size_t len, char **out)
-{
- char *outp;
- const char *next;
- const char *end;
-
- *out = outp = tor_malloc(len+1);
-
- end = data+len;
-
- while (data < end) {
- /* we're at the start of a line. */
- if (*data == '.')
- ++data;
- next = memchr(data, '\n', end-data);
- if (next) {
- size_t n_to_copy = next-data;
- /* Don't copy a CR that precedes this LF. */
- if (n_to_copy && *(next-1) == '\r')
- --n_to_copy;
- memcpy(outp, data, n_to_copy);
- outp += n_to_copy;
- data = next+1; /* This will point at the start of the next line,
- * or the end of the string, or a period. */
- } else {
- memcpy(outp, data, end-data);
- outp += (end-data);
- *outp = '\0';
- return outp - *out;
- }
- *outp++ = '\n';
- }
-
- *outp = '\0';
- return outp - *out;
-}
-
-/** If the first <b>in_len_max</b> characters in <b>start</b> contain a
- * double-quoted string with escaped characters, return the length of that
- * string (as encoded, including quotes). Otherwise return -1. */
-static inline int
-get_escaped_string_length(const char *start, size_t in_len_max,
- int *chars_out)
-{
- const char *cp, *end;
- int chars = 0;
-
- if (*start != '\"')
- return -1;
-
- cp = start+1;
- end = start+in_len_max;
-
- /* Calculate length. */
- while (1) {
- if (cp >= end) {
- return -1; /* Too long. */
- } else if (*cp == '\\') {
- if (++cp == end)
- return -1; /* Can't escape EOS. */
- ++cp;
- ++chars;
- } else if (*cp == '\"') {
- break;
- } else {
- ++cp;
- ++chars;
- }
- }
- if (chars_out)
- *chars_out = chars;
- return (int)(cp - start+1);
-}
-
-/** As decode_escaped_string, but does not decode the string: copies the
- * entire thing, including quotation marks. */
-static const char *
-extract_escaped_string(const char *start, size_t in_len_max,
- char **out, size_t *out_len)
-{
- int length = get_escaped_string_length(start, in_len_max, NULL);
- if (length<0)
- return NULL;
- *out_len = length;
- *out = tor_strndup(start, *out_len);
- return start+length;
-}
-
-/** Given a pointer to a string starting at <b>start</b> containing
- * <b>in_len_max</b> characters, decode a string beginning with one double
- * quote, containing any number of non-quote characters or characters escaped
- * with a backslash, and ending with a final double quote. Place the resulting
- * string (unquoted, unescaped) into a newly allocated string in *<b>out</b>;
- * store its length in <b>out_len</b>. On success, return a pointer to the
- * character immediately following the escaped string. On failure, return
- * NULL. */
-static const char *
-decode_escaped_string(const char *start, size_t in_len_max,
- char **out, size_t *out_len)
-{
- const char *cp, *end;
- char *outp;
- int len, n_chars = 0;
-
- len = get_escaped_string_length(start, in_len_max, &n_chars);
- if (len<0)
- return NULL;
-
- end = start+len-1; /* Index of last quote. */
- tor_assert(*end == '\"');
- outp = *out = tor_malloc(len+1);
- *out_len = n_chars;
-
- cp = start+1;
- while (cp < end) {
- if (*cp == '\\')
- ++cp;
- *outp++ = *cp++;
- }
- *outp = '\0';
- tor_assert((outp - *out) == (int)*out_len);
-
- return end+1;
-}
-
/** Create and add a new controller connection on <b>sock</b>. If
* <b>CC_LOCAL_FD_IS_OWNER</b> is set in <b>flags</b>, this Tor process should
* exit when the connection closes. If <b>CC_LOCAL_FD_IS_AUTHENTICATED</b>
@@ -720,29 +113,6 @@ control_connection_add_local_fd(tor_socket_t sock, unsigned flags)
return 0;
}
-/** Acts like sprintf, but writes its formatted string to the end of
- * <b>conn</b>-\>outbuf. */
-static void
-connection_printf_to_buf(control_connection_t *conn, const char *format, ...)
-{
- va_list ap;
- char *buf = NULL;
- int len;
-
- va_start(ap,format);
- len = tor_vasprintf(&buf, format, ap);
- va_end(ap);
-
- if (len < 0) {
- log_err(LD_BUG, "Unable to format string for controller.");
- tor_assert(0);
- }
-
- connection_buf_add(buf, (size_t)len, TO_CONN(conn));
-
- tor_free(buf);
-}
-
/** Write all of the open control ports to ControlPortWriteToFile */
void
control_ports_write_to_file(void)
@@ -787,886 +157,11 @@ control_ports_write_to_file(void)
smartlist_free(lines);
}
-/** Send a "DONE" message down the control connection <b>conn</b>. */
-static void
-send_control_done(control_connection_t *conn)
-{
- connection_write_str_to_buf("250 OK\r\n", conn);
-}
-
-/** Represents an event that's queued to be sent to one or more
- * controllers. */
-typedef struct queued_event_s {
- uint16_t event;
- char *msg;
-} queued_event_t;
-
-/** Pointer to int. If this is greater than 0, we don't allow new events to be
- * queued. */
-static tor_threadlocal_t block_event_queue_flag;
-
-/** Holds a smartlist of queued_event_t objects that may need to be sent
- * to one or more controllers */
-static smartlist_t *queued_control_events = NULL;
-
-/** True if the flush_queued_events_event is pending. */
-static int flush_queued_event_pending = 0;
-
-/** Lock to protect the above fields. */
-static tor_mutex_t *queued_control_events_lock = NULL;
-
-/** An event that should fire in order to flush the contents of
- * queued_control_events. */
-static mainloop_event_t *flush_queued_events_event = NULL;
-
-void
-control_initialize_event_queue(void)
-{
- if (queued_control_events == NULL) {
- queued_control_events = smartlist_new();
- }
-
- if (flush_queued_events_event == NULL) {
- struct event_base *b = tor_libevent_get_base();
- if (b) {
- flush_queued_events_event =
- mainloop_event_new(flush_queued_events_cb, NULL);
- tor_assert(flush_queued_events_event);
- }
- }
-
- if (queued_control_events_lock == NULL) {
- queued_control_events_lock = tor_mutex_new();
- tor_threadlocal_init(&block_event_queue_flag);
- }
-}
-
-static int *
-get_block_event_queue(void)
-{
- int *val = tor_threadlocal_get(&block_event_queue_flag);
- if (PREDICT_UNLIKELY(val == NULL)) {
- val = tor_malloc_zero(sizeof(int));
- tor_threadlocal_set(&block_event_queue_flag, val);
- }
- return val;
-}
-
-/** Helper: inserts an event on the list of events queued to be sent to
- * one or more controllers, and schedules the events to be flushed if needed.
- *
- * This function takes ownership of <b>msg</b>, and may free it.
- *
- * We queue these events rather than send them immediately in order to break
- * the dependency in our callgraph from code that generates events for the
- * controller, and the network layer at large. Otherwise, nearly every
- * interesting part of Tor would potentially call every other interesting part
- * of Tor.
- */
-MOCK_IMPL(STATIC void,
-queue_control_event_string,(uint16_t event, char *msg))
-{
- /* This is redundant with checks done elsewhere, but it's a last-ditch
- * attempt to avoid queueing something we shouldn't have to queue. */
- if (PREDICT_UNLIKELY( ! EVENT_IS_INTERESTING(event) )) {
- tor_free(msg);
- return;
- }
-
- int *block_event_queue = get_block_event_queue();
- if (*block_event_queue) {
- tor_free(msg);
- return;
- }
-
- queued_event_t *ev = tor_malloc(sizeof(*ev));
- ev->event = event;
- ev->msg = msg;
-
- /* No queueing an event while queueing an event */
- ++*block_event_queue;
-
- tor_mutex_acquire(queued_control_events_lock);
- tor_assert(queued_control_events);
- smartlist_add(queued_control_events, ev);
-
- int activate_event = 0;
- if (! flush_queued_event_pending && in_main_thread()) {
- activate_event = 1;
- flush_queued_event_pending = 1;
- }
-
- tor_mutex_release(queued_control_events_lock);
-
- --*block_event_queue;
-
- /* We just put an event on the queue; mark the queue to be
- * flushed. We only do this from the main thread for now; otherwise,
- * we'd need to incur locking overhead in Libevent or use a socket.
- */
- if (activate_event) {
- tor_assert(flush_queued_events_event);
- mainloop_event_activate(flush_queued_events_event);
- }
-}
-
-#define queued_event_free(ev) \
- FREE_AND_NULL(queued_event_t, queued_event_free_, (ev))
-
-/** Release all storage held by <b>ev</b>. */
-static void
-queued_event_free_(queued_event_t *ev)
-{
- if (ev == NULL)
- return;
-
- tor_free(ev->msg);
- tor_free(ev);
-}
-
-/** Send every queued event to every controller that's interested in it,
- * and remove the events from the queue. If <b>force</b> is true,
- * then make all controllers send their data out immediately, since we
- * may be about to shut down. */
-static void
-queued_events_flush_all(int force)
-{
- /* Make sure that we get all the pending log events, if there are any. */
- flush_pending_log_callbacks();
-
- if (PREDICT_UNLIKELY(queued_control_events == NULL)) {
- return;
- }
- smartlist_t *all_conns = get_connection_array();
- smartlist_t *controllers = smartlist_new();
- smartlist_t *queued_events;
-
- int *block_event_queue = get_block_event_queue();
- ++*block_event_queue;
-
- tor_mutex_acquire(queued_control_events_lock);
- /* No queueing an event while flushing events. */
- flush_queued_event_pending = 0;
- queued_events = queued_control_events;
- queued_control_events = smartlist_new();
- tor_mutex_release(queued_control_events_lock);
-
- /* Gather all the controllers that will care... */
- SMARTLIST_FOREACH_BEGIN(all_conns, connection_t *, conn) {
- if (conn->type == CONN_TYPE_CONTROL &&
- !conn->marked_for_close &&
- conn->state == CONTROL_CONN_STATE_OPEN) {
- control_connection_t *control_conn = TO_CONTROL_CONN(conn);
-
- smartlist_add(controllers, control_conn);
- }
- } SMARTLIST_FOREACH_END(conn);
-
- SMARTLIST_FOREACH_BEGIN(queued_events, queued_event_t *, ev) {
- const event_mask_t bit = ((event_mask_t)1) << ev->event;
- const size_t msg_len = strlen(ev->msg);
- SMARTLIST_FOREACH_BEGIN(controllers, control_connection_t *,
- control_conn) {
- if (control_conn->event_mask & bit) {
- connection_buf_add(ev->msg, msg_len, TO_CONN(control_conn));
- }
- } SMARTLIST_FOREACH_END(control_conn);
-
- queued_event_free(ev);
- } SMARTLIST_FOREACH_END(ev);
-
- if (force) {
- SMARTLIST_FOREACH_BEGIN(controllers, control_connection_t *,
- control_conn) {
- connection_flush(TO_CONN(control_conn));
- } SMARTLIST_FOREACH_END(control_conn);
- }
-
- smartlist_free(queued_events);
- smartlist_free(controllers);
-
- --*block_event_queue;
-}
-
-/** Libevent callback: Flushes pending events to controllers that are
- * interested in them. */
-static void
-flush_queued_events_cb(mainloop_event_t *event, void *arg)
-{
- (void) event;
- (void) arg;
- queued_events_flush_all(0);
-}
-
-/** Send an event to all v1 controllers that are listening for code
- * <b>event</b>. The event's body is given by <b>msg</b>.
- *
- * The EXTENDED_FORMAT and NONEXTENDED_FORMAT flags behave similarly with
- * respect to the EXTENDED_EVENTS feature. */
-MOCK_IMPL(STATIC void,
-send_control_event_string,(uint16_t event,
- const char *msg))
-{
- tor_assert(event >= EVENT_MIN_ && event <= EVENT_MAX_);
- queue_control_event_string(event, tor_strdup(msg));
-}
-
-/** Helper for send_control_event and control_event_status:
- * Send an event to all v1 controllers that are listening for code
- * <b>event</b>. The event's body is created by the printf-style format in
- * <b>format</b>, and other arguments as provided. */
-static void
-send_control_event_impl(uint16_t event,
- const char *format, va_list ap)
-{
- char *buf = NULL;
- int len;
-
- len = tor_vasprintf(&buf, format, ap);
- if (len < 0) {
- log_warn(LD_BUG, "Unable to format event for controller.");
- return;
- }
-
- queue_control_event_string(event, buf);
-}
-
-/** Send an event to all v1 controllers that are listening for code
- * <b>event</b>. The event's body is created by the printf-style format in
- * <b>format</b>, and other arguments as provided. */
-static void
-send_control_event(uint16_t event,
- const char *format, ...)
-{
- va_list ap;
- va_start(ap, format);
- send_control_event_impl(event, format, ap);
- va_end(ap);
-}
-
-/** Given a text circuit <b>id</b>, return the corresponding circuit. */
-static origin_circuit_t *
-get_circ(const char *id)
-{
- uint32_t n_id;
- int ok;
- n_id = (uint32_t) tor_parse_ulong(id, 10, 0, UINT32_MAX, &ok, NULL);
- if (!ok)
- return NULL;
- return circuit_get_by_global_id(n_id);
-}
-
-/** Given a text stream <b>id</b>, return the corresponding AP connection. */
-static entry_connection_t *
-get_stream(const char *id)
-{
- uint64_t n_id;
- int ok;
- connection_t *conn;
- n_id = tor_parse_uint64(id, 10, 0, UINT64_MAX, &ok, NULL);
- if (!ok)
- return NULL;
- conn = connection_get_by_global_id(n_id);
- if (!conn || conn->type != CONN_TYPE_AP || conn->marked_for_close)
- return NULL;
- return TO_ENTRY_CONN(conn);
-}
-
-/** Helper for setconf and resetconf. Acts like setconf, except
- * it passes <b>use_defaults</b> on to options_trial_assign(). Modifies the
- * contents of body.
- */
-static int
-control_setconf_helper(control_connection_t *conn, uint32_t len, char *body,
- int use_defaults)
-{
- setopt_err_t opt_err;
- config_line_t *lines=NULL;
- char *start = body;
- char *errstring = NULL;
- const unsigned flags =
- CAL_CLEAR_FIRST | (use_defaults ? CAL_USE_DEFAULTS : 0);
-
- char *config;
- smartlist_t *entries = smartlist_new();
-
- /* We have a string, "body", of the format '(key(=val|="val")?)' entries
- * separated by space. break it into a list of configuration entries. */
- while (*body) {
- char *eq = body;
- char *key;
- char *entry;
- while (!TOR_ISSPACE(*eq) && *eq != '=')
- ++eq;
- key = tor_strndup(body, eq-body);
- body = eq+1;
- if (*eq == '=') {
- char *val=NULL;
- size_t val_len=0;
- if (*body != '\"') {
- char *val_start = body;
- while (!TOR_ISSPACE(*body))
- body++;
- val = tor_strndup(val_start, body-val_start);
- val_len = strlen(val);
- } else {
- body = (char*)extract_escaped_string(body, (len - (body-start)),
- &val, &val_len);
- if (!body) {
- connection_write_str_to_buf("551 Couldn't parse string\r\n", conn);
- SMARTLIST_FOREACH(entries, char *, cp, tor_free(cp));
- smartlist_free(entries);
- tor_free(key);
- return 0;
- }
- }
- tor_asprintf(&entry, "%s %s", key, val);
- tor_free(key);
- tor_free(val);
- } else {
- entry = key;
- }
- smartlist_add(entries, entry);
- while (TOR_ISSPACE(*body))
- ++body;
- }
-
- smartlist_add_strdup(entries, "");
- config = smartlist_join_strings(entries, "\n", 0, NULL);
- SMARTLIST_FOREACH(entries, char *, cp, tor_free(cp));
- smartlist_free(entries);
-
- if (config_get_lines(config, &lines, 0) < 0) {
- log_warn(LD_CONTROL,"Controller gave us config lines we can't parse.");
- connection_write_str_to_buf("551 Couldn't parse configuration\r\n",
- conn);
- tor_free(config);
- return 0;
- }
- tor_free(config);
-
- opt_err = options_trial_assign(lines, flags, &errstring);
- {
- const char *msg;
- switch (opt_err) {
- case SETOPT_ERR_MISC:
- msg = "552 Unrecognized option";
- break;
- case SETOPT_ERR_PARSE:
- msg = "513 Unacceptable option value";
- break;
- case SETOPT_ERR_TRANSITION:
- msg = "553 Transition not allowed";
- break;
- case SETOPT_ERR_SETTING:
- default:
- msg = "553 Unable to set option";
- break;
- case SETOPT_OK:
- config_free_lines(lines);
- send_control_done(conn);
- return 0;
- }
- log_warn(LD_CONTROL,
- "Controller gave us config lines that didn't validate: %s",
- errstring);
- connection_printf_to_buf(conn, "%s: %s\r\n", msg, errstring);
- config_free_lines(lines);
- tor_free(errstring);
- return 0;
- }
-}
-
-/** Called when we receive a SETCONF message: parse the body and try
- * to update our configuration. Reply with a DONE or ERROR message.
- * Modifies the contents of body.*/
-static int
-handle_control_setconf(control_connection_t *conn, uint32_t len, char *body)
-{
- return control_setconf_helper(conn, len, body, 0);
-}
-
-/** Called when we receive a RESETCONF message: parse the body and try
- * to update our configuration. Reply with a DONE or ERROR message.
- * Modifies the contents of body. */
-static int
-handle_control_resetconf(control_connection_t *conn, uint32_t len, char *body)
-{
- return control_setconf_helper(conn, len, body, 1);
-}
-
-/** Called when we receive a GETCONF message. Parse the request, and
- * reply with a CONFVALUE or an ERROR message */
-static int
-handle_control_getconf(control_connection_t *conn, uint32_t body_len,
- const char *body)
-{
- smartlist_t *questions = smartlist_new();
- smartlist_t *answers = smartlist_new();
- smartlist_t *unrecognized = smartlist_new();
- char *msg = NULL;
- size_t msg_len;
- const or_options_t *options = get_options();
- int i, len;
-
- (void) body_len; /* body is NUL-terminated; so we can ignore len. */
- smartlist_split_string(questions, body, " ",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
- SMARTLIST_FOREACH_BEGIN(questions, const char *, q) {
- if (!option_is_recognized(q)) {
- smartlist_add(unrecognized, (char*) q);
- } else {
- config_line_t *answer = option_get_assignment(options,q);
- if (!answer) {
- const char *name = option_get_canonical_name(q);
- smartlist_add_asprintf(answers, "250-%s\r\n", name);
- }
-
- while (answer) {
- config_line_t *next;
- smartlist_add_asprintf(answers, "250-%s=%s\r\n",
- answer->key, answer->value);
-
- next = answer->next;
- tor_free(answer->key);
- tor_free(answer->value);
- tor_free(answer);
- answer = next;
- }
- }
- } SMARTLIST_FOREACH_END(q);
-
- if ((len = smartlist_len(unrecognized))) {
- for (i=0; i < len-1; ++i)
- connection_printf_to_buf(conn,
- "552-Unrecognized configuration key \"%s\"\r\n",
- (char*)smartlist_get(unrecognized, i));
- connection_printf_to_buf(conn,
- "552 Unrecognized configuration key \"%s\"\r\n",
- (char*)smartlist_get(unrecognized, len-1));
- } else if ((len = smartlist_len(answers))) {
- char *tmp = smartlist_get(answers, len-1);
- tor_assert(strlen(tmp)>4);
- tmp[3] = ' ';
- msg = smartlist_join_strings(answers, "", 0, &msg_len);
- connection_buf_add(msg, msg_len, TO_CONN(conn));
- } else {
- connection_write_str_to_buf("250 OK\r\n", conn);
- }
-
- SMARTLIST_FOREACH(answers, char *, cp, tor_free(cp));
- smartlist_free(answers);
- SMARTLIST_FOREACH(questions, char *, cp, tor_free(cp));
- smartlist_free(questions);
- smartlist_free(unrecognized);
-
- tor_free(msg);
-
- return 0;
-}
-
-/** Called when we get a +LOADCONF message. */
-static int
-handle_control_loadconf(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- setopt_err_t retval;
- char *errstring = NULL;
- const char *msg = NULL;
- (void) len;
-
- retval = options_init_from_string(NULL, body, CMD_RUN_TOR, NULL, &errstring);
-
- if (retval != SETOPT_OK)
- log_warn(LD_CONTROL,
- "Controller gave us config file that didn't validate: %s",
- errstring);
-
- switch (retval) {
- case SETOPT_ERR_PARSE:
- msg = "552 Invalid config file";
- break;
- case SETOPT_ERR_TRANSITION:
- msg = "553 Transition not allowed";
- break;
- case SETOPT_ERR_SETTING:
- msg = "553 Unable to set option";
- break;
- case SETOPT_ERR_MISC:
- default:
- msg = "550 Unable to load config";
- break;
- case SETOPT_OK:
- break;
- }
- if (msg) {
- if (errstring)
- connection_printf_to_buf(conn, "%s: %s\r\n", msg, errstring);
- else
- connection_printf_to_buf(conn, "%s\r\n", msg);
- } else {
- send_control_done(conn);
- }
- tor_free(errstring);
- return 0;
-}
-
-/** Helper structure: maps event values to their names. */
-struct control_event_t {
- uint16_t event_code;
- const char *event_name;
-};
-/** Table mapping event values to their names. Used to implement SETEVENTS
- * and GETINFO events/names, and to keep they in sync. */
-static const struct control_event_t control_event_table[] = {
- { EVENT_CIRCUIT_STATUS, "CIRC" },
- { EVENT_CIRCUIT_STATUS_MINOR, "CIRC_MINOR" },
- { EVENT_STREAM_STATUS, "STREAM" },
- { EVENT_OR_CONN_STATUS, "ORCONN" },
- { EVENT_BANDWIDTH_USED, "BW" },
- { EVENT_DEBUG_MSG, "DEBUG" },
- { EVENT_INFO_MSG, "INFO" },
- { EVENT_NOTICE_MSG, "NOTICE" },
- { EVENT_WARN_MSG, "WARN" },
- { EVENT_ERR_MSG, "ERR" },
- { EVENT_NEW_DESC, "NEWDESC" },
- { EVENT_ADDRMAP, "ADDRMAP" },
- { EVENT_DESCCHANGED, "DESCCHANGED" },
- { EVENT_NS, "NS" },
- { EVENT_STATUS_GENERAL, "STATUS_GENERAL" },
- { EVENT_STATUS_CLIENT, "STATUS_CLIENT" },
- { EVENT_STATUS_SERVER, "STATUS_SERVER" },
- { EVENT_GUARD, "GUARD" },
- { EVENT_STREAM_BANDWIDTH_USED, "STREAM_BW" },
- { EVENT_CLIENTS_SEEN, "CLIENTS_SEEN" },
- { EVENT_NEWCONSENSUS, "NEWCONSENSUS" },
- { EVENT_BUILDTIMEOUT_SET, "BUILDTIMEOUT_SET" },
- { EVENT_GOT_SIGNAL, "SIGNAL" },
- { EVENT_CONF_CHANGED, "CONF_CHANGED"},
- { EVENT_CONN_BW, "CONN_BW" },
- { EVENT_CELL_STATS, "CELL_STATS" },
- { EVENT_CIRC_BANDWIDTH_USED, "CIRC_BW" },
- { EVENT_TRANSPORT_LAUNCHED, "TRANSPORT_LAUNCHED" },
- { EVENT_HS_DESC, "HS_DESC" },
- { EVENT_HS_DESC_CONTENT, "HS_DESC_CONTENT" },
- { EVENT_NETWORK_LIVENESS, "NETWORK_LIVENESS" },
- { 0, NULL },
-};
-
-/** Called when we get a SETEVENTS message: update conn->event_mask,
- * and reply with DONE or ERROR. */
-static int
-handle_control_setevents(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- int event_code;
- event_mask_t event_mask = 0;
- smartlist_t *events = smartlist_new();
-
- (void) len;
-
- smartlist_split_string(events, body, " ",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
- SMARTLIST_FOREACH_BEGIN(events, const char *, ev)
- {
- if (!strcasecmp(ev, "EXTENDED") ||
- !strcasecmp(ev, "AUTHDIR_NEWDESCS")) {
- log_warn(LD_CONTROL, "The \"%s\" SETEVENTS argument is no longer "
- "supported.", ev);
- continue;
- } else {
- int i;
- event_code = -1;
-
- for (i = 0; control_event_table[i].event_name != NULL; ++i) {
- if (!strcasecmp(ev, control_event_table[i].event_name)) {
- event_code = control_event_table[i].event_code;
- break;
- }
- }
-
- if (event_code == -1) {
- connection_printf_to_buf(conn, "552 Unrecognized event \"%s\"\r\n",
- ev);
- SMARTLIST_FOREACH(events, char *, e, tor_free(e));
- smartlist_free(events);
- return 0;
- }
- }
- event_mask |= (((event_mask_t)1) << event_code);
- }
- SMARTLIST_FOREACH_END(ev);
- SMARTLIST_FOREACH(events, char *, e, tor_free(e));
- smartlist_free(events);
-
- conn->event_mask = event_mask;
-
- control_update_global_event_mask();
- send_control_done(conn);
- return 0;
-}
-
-/** Decode the hashed, base64'd passwords stored in <b>passwords</b>.
- * Return a smartlist of acceptable passwords (unterminated strings of
- * length S2K_RFC2440_SPECIFIER_LEN+DIGEST_LEN) on success, or NULL on
- * failure.
- */
-smartlist_t *
-decode_hashed_passwords(config_line_t *passwords)
-{
- char decoded[64];
- config_line_t *cl;
- smartlist_t *sl = smartlist_new();
-
- tor_assert(passwords);
-
- for (cl = passwords; cl; cl = cl->next) {
- const char *hashed = cl->value;
-
- if (!strcmpstart(hashed, "16:")) {
- if (base16_decode(decoded, sizeof(decoded), hashed+3, strlen(hashed+3))
- != S2K_RFC2440_SPECIFIER_LEN + DIGEST_LEN
- || strlen(hashed+3) != (S2K_RFC2440_SPECIFIER_LEN+DIGEST_LEN)*2) {
- goto err;
- }
- } else {
- if (base64_decode(decoded, sizeof(decoded), hashed, strlen(hashed))
- != S2K_RFC2440_SPECIFIER_LEN+DIGEST_LEN) {
- goto err;
- }
- }
- smartlist_add(sl,
- tor_memdup(decoded, S2K_RFC2440_SPECIFIER_LEN+DIGEST_LEN));
- }
-
- return sl;
-
- err:
- SMARTLIST_FOREACH(sl, char*, cp, tor_free(cp));
- smartlist_free(sl);
- return NULL;
-}
-
-/** Called when we get an AUTHENTICATE message. Check whether the
- * authentication is valid, and if so, update the connection's state to
- * OPEN. Reply with DONE or ERROR.
- */
-static int
-handle_control_authenticate(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- int used_quoted_string = 0;
- const or_options_t *options = get_options();
- const char *errstr = "Unknown error";
- char *password;
- size_t password_len;
- const char *cp;
- int i;
- int bad_cookie=0, bad_password=0;
- smartlist_t *sl = NULL;
-
- if (!len) {
- password = tor_strdup("");
- password_len = 0;
- } else if (TOR_ISXDIGIT(body[0])) {
- cp = body;
- while (TOR_ISXDIGIT(*cp))
- ++cp;
- i = (int)(cp - body);
- tor_assert(i>0);
- password_len = i/2;
- password = tor_malloc(password_len + 1);
- if (base16_decode(password, password_len+1, body, i)
- != (int) password_len) {
- connection_write_str_to_buf(
- "551 Invalid hexadecimal encoding. Maybe you tried a plain text "
- "password? If so, the standard requires that you put it in "
- "double quotes.\r\n", conn);
- connection_mark_for_close(TO_CONN(conn));
- tor_free(password);
- return 0;
- }
- } else {
- if (!decode_escaped_string(body, len, &password, &password_len)) {
- connection_write_str_to_buf("551 Invalid quoted string. You need "
- "to put the password in double quotes.\r\n", conn);
- connection_mark_for_close(TO_CONN(conn));
- return 0;
- }
- used_quoted_string = 1;
- }
-
- if (conn->safecookie_client_hash != NULL) {
- /* The controller has chosen safe cookie authentication; the only
- * acceptable authentication value is the controller-to-server
- * response. */
-
- tor_assert(authentication_cookie_is_set);
-
- if (password_len != DIGEST256_LEN) {
- log_warn(LD_CONTROL,
- "Got safe cookie authentication response with wrong length "
- "(%d)", (int)password_len);
- errstr = "Wrong length for safe cookie response.";
- goto err;
- }
-
- if (tor_memneq(conn->safecookie_client_hash, password, DIGEST256_LEN)) {
- log_warn(LD_CONTROL,
- "Got incorrect safe cookie authentication response");
- errstr = "Safe cookie response did not match expected value.";
- goto err;
- }
-
- tor_free(conn->safecookie_client_hash);
- goto ok;
- }
-
- if (!options->CookieAuthentication && !options->HashedControlPassword &&
- !options->HashedControlSessionPassword) {
- /* if Tor doesn't demand any stronger authentication, then
- * the controller can get in with anything. */
- goto ok;
- }
-
- if (options->CookieAuthentication) {
- int also_password = options->HashedControlPassword != NULL ||
- options->HashedControlSessionPassword != NULL;
- if (password_len != AUTHENTICATION_COOKIE_LEN) {
- if (!also_password) {
- log_warn(LD_CONTROL, "Got authentication cookie with wrong length "
- "(%d)", (int)password_len);
- errstr = "Wrong length on authentication cookie.";
- goto err;
- }
- bad_cookie = 1;
- } else if (tor_memneq(authentication_cookie, password, password_len)) {
- if (!also_password) {
- log_warn(LD_CONTROL, "Got mismatched authentication cookie");
- errstr = "Authentication cookie did not match expected value.";
- goto err;
- }
- bad_cookie = 1;
- } else {
- goto ok;
- }
- }
-
- if (options->HashedControlPassword ||
- options->HashedControlSessionPassword) {
- int bad = 0;
- smartlist_t *sl_tmp;
- char received[DIGEST_LEN];
- int also_cookie = options->CookieAuthentication;
- sl = smartlist_new();
- if (options->HashedControlPassword) {
- sl_tmp = decode_hashed_passwords(options->HashedControlPassword);
- if (!sl_tmp)
- bad = 1;
- else {
- smartlist_add_all(sl, sl_tmp);
- smartlist_free(sl_tmp);
- }
- }
- if (options->HashedControlSessionPassword) {
- sl_tmp = decode_hashed_passwords(options->HashedControlSessionPassword);
- if (!sl_tmp)
- bad = 1;
- else {
- smartlist_add_all(sl, sl_tmp);
- smartlist_free(sl_tmp);
- }
- }
- if (bad) {
- if (!also_cookie) {
- log_warn(LD_BUG,
- "Couldn't decode HashedControlPassword: invalid base16");
- errstr="Couldn't decode HashedControlPassword value in configuration.";
- goto err;
- }
- bad_password = 1;
- SMARTLIST_FOREACH(sl, char *, str, tor_free(str));
- smartlist_free(sl);
- sl = NULL;
- } else {
- SMARTLIST_FOREACH(sl, char *, expected,
- {
- secret_to_key_rfc2440(received,DIGEST_LEN,
- password,password_len,expected);
- if (tor_memeq(expected + S2K_RFC2440_SPECIFIER_LEN,
- received, DIGEST_LEN))
- goto ok;
- });
- SMARTLIST_FOREACH(sl, char *, str, tor_free(str));
- smartlist_free(sl);
- sl = NULL;
-
- if (used_quoted_string)
- errstr = "Password did not match HashedControlPassword value from "
- "configuration";
- else
- errstr = "Password did not match HashedControlPassword value from "
- "configuration. Maybe you tried a plain text password? "
- "If so, the standard requires that you put it in double quotes.";
- bad_password = 1;
- if (!also_cookie)
- goto err;
- }
- }
-
- /** We only get here if both kinds of authentication failed. */
- tor_assert(bad_password && bad_cookie);
- log_warn(LD_CONTROL, "Bad password or authentication cookie on controller.");
- errstr = "Password did not match HashedControlPassword *or* authentication "
- "cookie.";
-
- err:
- tor_free(password);
- connection_printf_to_buf(conn, "515 Authentication failed: %s\r\n", errstr);
- connection_mark_for_close(TO_CONN(conn));
- if (sl) { /* clean up */
- SMARTLIST_FOREACH(sl, char *, str, tor_free(str));
- smartlist_free(sl);
- }
- return 0;
- ok:
- log_info(LD_CONTROL, "Authenticated control connection ("TOR_SOCKET_T_FORMAT
- ")", conn->base_.s);
- send_control_done(conn);
- conn->base_.state = CONTROL_CONN_STATE_OPEN;
- tor_free(password);
- if (sl) { /* clean up */
- SMARTLIST_FOREACH(sl, char *, str, tor_free(str));
- smartlist_free(sl);
- }
- return 0;
-}
-
-/** Called when we get a SAVECONF command. Try to flush the current options to
- * disk, and report success or failure. */
-static int
-handle_control_saveconf(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- (void) len;
-
- int force = !strcmpstart(body, "FORCE");
- const or_options_t *options = get_options();
- if ((!force && options->IncludeUsed) || options_save_current() < 0) {
- connection_write_str_to_buf(
- "551 Unable to write configuration to disk.\r\n", conn);
- } else {
- send_control_done(conn);
- }
- return 0;
-}
-
-struct signal_t {
- int sig;
- const char *signal_name;
-};
-
-static const struct signal_t signal_table[] = {
+const struct signal_name_t signal_table[] = {
+ /* NOTE: this table is used for handling SIGNAL commands and generating
+ * SIGNAL events. Order is significant: if there are two entries for the
+ * same numeric signal, the first one is the canonical name generated
+ * for the events. */
{ SIGHUP, "RELOAD" },
{ SIGHUP, "HUP" },
{ SIGINT, "SHUTDOWN" },
@@ -1680,3576 +175,11 @@ static const struct signal_t signal_table[] = {
{ SIGNEWNYM, "NEWNYM" },
{ SIGCLEARDNSCACHE, "CLEARDNSCACHE"},
{ SIGHEARTBEAT, "HEARTBEAT"},
+ { SIGACTIVE, "ACTIVE" },
+ { SIGDORMANT, "DORMANT" },
{ 0, NULL },
};
-/** Called when we get a SIGNAL command. React to the provided signal, and
- * report success or failure. (If the signal results in a shutdown, success
- * may not be reported.) */
-static int
-handle_control_signal(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- int sig = -1;
- int i;
- int n = 0;
- char *s;
-
- (void) len;
-
- while (body[n] && ! TOR_ISSPACE(body[n]))
- ++n;
- s = tor_strndup(body, n);
-
- for (i = 0; signal_table[i].signal_name != NULL; ++i) {
- if (!strcasecmp(s, signal_table[i].signal_name)) {
- sig = signal_table[i].sig;
- break;
- }
- }
-
- if (sig < 0)
- connection_printf_to_buf(conn, "552 Unrecognized signal code \"%s\"\r\n",
- s);
- tor_free(s);
- if (sig < 0)
- return 0;
-
- send_control_done(conn);
- /* Flush the "done" first if the signal might make us shut down. */
- if (sig == SIGTERM || sig == SIGINT)
- connection_flush(TO_CONN(conn));
-
- activate_signal(sig);
-
- return 0;
-}
-
-/** Called when we get a TAKEOWNERSHIP command. Mark this connection
- * as an owning connection, so that we will exit if the connection
- * closes. */
-static int
-handle_control_takeownership(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- (void)len;
- (void)body;
-
- conn->is_owning_control_connection = 1;
-
- log_info(LD_CONTROL, "Control connection %d has taken ownership of this "
- "Tor instance.",
- (int)(conn->base_.s));
-
- send_control_done(conn);
- return 0;
-}
-
-/** Return true iff <b>addr</b> is unusable as a mapaddress target because of
- * containing funny characters. */
-static int
-address_is_invalid_mapaddress_target(const char *addr)
-{
- if (!strcmpstart(addr, "*."))
- return address_is_invalid_destination(addr+2, 1);
- else
- return address_is_invalid_destination(addr, 1);
-}
-
-/** Called when we get a MAPADDRESS command; try to bind all listed addresses,
- * and report success or failure. */
-static int
-handle_control_mapaddress(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- smartlist_t *elts;
- smartlist_t *lines;
- smartlist_t *reply;
- char *r;
- size_t sz;
- (void) len; /* body is NUL-terminated, so it's safe to ignore the length. */
-
- lines = smartlist_new();
- elts = smartlist_new();
- reply = smartlist_new();
- smartlist_split_string(lines, body, " ",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
- SMARTLIST_FOREACH_BEGIN(lines, char *, line) {
- tor_strlower(line);
- smartlist_split_string(elts, line, "=", 0, 2);
- if (smartlist_len(elts) == 2) {
- const char *from = smartlist_get(elts,0);
- const char *to = smartlist_get(elts,1);
- if (address_is_invalid_mapaddress_target(to)) {
- smartlist_add_asprintf(reply,
- "512-syntax error: invalid address '%s'", to);
- log_warn(LD_CONTROL,
- "Skipping invalid argument '%s' in MapAddress msg", to);
- } else if (!strcmp(from, ".") || !strcmp(from, "0.0.0.0") ||
- !strcmp(from, "::")) {
- const char type =
- !strcmp(from,".") ? RESOLVED_TYPE_HOSTNAME :
- (!strcmp(from, "0.0.0.0") ? RESOLVED_TYPE_IPV4 : RESOLVED_TYPE_IPV6);
- const char *address = addressmap_register_virtual_address(
- type, tor_strdup(to));
- if (!address) {
- smartlist_add_asprintf(reply,
- "451-resource exhausted: skipping '%s'", line);
- log_warn(LD_CONTROL,
- "Unable to allocate address for '%s' in MapAddress msg",
- safe_str_client(line));
- } else {
- smartlist_add_asprintf(reply, "250-%s=%s", address, to);
- }
- } else {
- const char *msg;
- if (addressmap_register_auto(from, to, 1,
- ADDRMAPSRC_CONTROLLER, &msg) < 0) {
- smartlist_add_asprintf(reply,
- "512-syntax error: invalid address mapping "
- " '%s': %s", line, msg);
- log_warn(LD_CONTROL,
- "Skipping invalid argument '%s' in MapAddress msg: %s",
- line, msg);
- } else {
- smartlist_add_asprintf(reply, "250-%s", line);
- }
- }
- } else {
- smartlist_add_asprintf(reply, "512-syntax error: mapping '%s' is "
- "not of expected form 'foo=bar'.", line);
- log_info(LD_CONTROL, "Skipping MapAddress '%s': wrong "
- "number of items.",
- safe_str_client(line));
- }
- SMARTLIST_FOREACH(elts, char *, cp, tor_free(cp));
- smartlist_clear(elts);
- } SMARTLIST_FOREACH_END(line);
- SMARTLIST_FOREACH(lines, char *, cp, tor_free(cp));
- smartlist_free(lines);
- smartlist_free(elts);
-
- if (smartlist_len(reply)) {
- ((char*)smartlist_get(reply,smartlist_len(reply)-1))[3] = ' ';
- r = smartlist_join_strings(reply, "\r\n", 1, &sz);
- connection_buf_add(r, sz, TO_CONN(conn));
- tor_free(r);
- } else {
- const char *response =
- "512 syntax error: not enough arguments to mapaddress.\r\n";
- connection_buf_add(response, strlen(response), TO_CONN(conn));
- }
-
- SMARTLIST_FOREACH(reply, char *, cp, tor_free(cp));
- smartlist_free(reply);
- return 0;
-}
-
-/** Implementation helper for GETINFO: knows the answers for various
- * trivial-to-implement questions. */
-static int
-getinfo_helper_misc(control_connection_t *conn, const char *question,
- char **answer, const char **errmsg)
-{
- (void) conn;
- if (!strcmp(question, "version")) {
- *answer = tor_strdup(get_version());
- } else if (!strcmp(question, "bw-event-cache")) {
- *answer = get_bw_samples();
- } else if (!strcmp(question, "config-file")) {
- const char *a = get_torrc_fname(0);
- if (a)
- *answer = tor_strdup(a);
- } else if (!strcmp(question, "config-defaults-file")) {
- const char *a = get_torrc_fname(1);
- if (a)
- *answer = tor_strdup(a);
- } else if (!strcmp(question, "config-text")) {
- *answer = options_dump(get_options(), OPTIONS_DUMP_MINIMAL);
- } else if (!strcmp(question, "config-can-saveconf")) {
- *answer = tor_strdup(get_options()->IncludeUsed ? "0" : "1");
- } else if (!strcmp(question, "info/names")) {
- *answer = list_getinfo_options();
- } else if (!strcmp(question, "dormant")) {
- int dormant = rep_hist_circbuilding_dormant(time(NULL));
- *answer = tor_strdup(dormant ? "1" : "0");
- } else if (!strcmp(question, "events/names")) {
- int i;
- smartlist_t *event_names = smartlist_new();
-
- for (i = 0; control_event_table[i].event_name != NULL; ++i) {
- smartlist_add(event_names, (char *)control_event_table[i].event_name);
- }
-
- *answer = smartlist_join_strings(event_names, " ", 0, NULL);
-
- smartlist_free(event_names);
- } else if (!strcmp(question, "signal/names")) {
- smartlist_t *signal_names = smartlist_new();
- int j;
- for (j = 0; signal_table[j].signal_name != NULL; ++j) {
- smartlist_add(signal_names, (char*)signal_table[j].signal_name);
- }
-
- *answer = smartlist_join_strings(signal_names, " ", 0, NULL);
-
- smartlist_free(signal_names);
- } else if (!strcmp(question, "features/names")) {
- *answer = tor_strdup("VERBOSE_NAMES EXTENDED_EVENTS");
- } else if (!strcmp(question, "address")) {
- uint32_t addr;
- if (router_pick_published_address(get_options(), &addr, 0) < 0) {
- *errmsg = "Address unknown";
- return -1;
- }
- *answer = tor_dup_ip(addr);
- } else if (!strcmp(question, "traffic/read")) {
- tor_asprintf(answer, "%"PRIu64, (get_bytes_read()));
- } else if (!strcmp(question, "traffic/written")) {
- tor_asprintf(answer, "%"PRIu64, (get_bytes_written()));
- } else if (!strcmp(question, "uptime")) {
- long uptime_secs = get_uptime();
- tor_asprintf(answer, "%ld", uptime_secs);
- } else if (!strcmp(question, "process/pid")) {
- int myPid = -1;
-
-#ifdef _WIN32
- myPid = _getpid();
-#else
- myPid = getpid();
-#endif
-
- tor_asprintf(answer, "%d", myPid);
- } else if (!strcmp(question, "process/uid")) {
-#ifdef _WIN32
- *answer = tor_strdup("-1");
-#else
- int myUid = geteuid();
- tor_asprintf(answer, "%d", myUid);
-#endif /* defined(_WIN32) */
- } else if (!strcmp(question, "process/user")) {
-#ifdef _WIN32
- *answer = tor_strdup("");
-#else
- int myUid = geteuid();
- const struct passwd *myPwEntry = tor_getpwuid(myUid);
-
- if (myPwEntry) {
- *answer = tor_strdup(myPwEntry->pw_name);
- } else {
- *answer = tor_strdup("");
- }
-#endif /* defined(_WIN32) */
- } else if (!strcmp(question, "process/descriptor-limit")) {
- int max_fds = get_max_sockets();
- tor_asprintf(answer, "%d", max_fds);
- } else if (!strcmp(question, "limits/max-mem-in-queues")) {
- tor_asprintf(answer, "%"PRIu64,
- (get_options()->MaxMemInQueues));
- } else if (!strcmp(question, "fingerprint")) {
- crypto_pk_t *server_key;
- if (!server_mode(get_options())) {
- *errmsg = "Not running in server mode";
- return -1;
- }
- server_key = get_server_identity_key();
- *answer = tor_malloc(HEX_DIGEST_LEN+1);
- crypto_pk_get_fingerprint(server_key, *answer, 0);
- }
- return 0;
-}
-
-/** Awful hack: return a newly allocated string based on a routerinfo and
- * (possibly) an extrainfo, sticking the read-history and write-history from
- * <b>ei</b> into the resulting string. The thing you get back won't
- * necessarily have a valid signature.
- *
- * New code should never use this; it's for backward compatibility.
- *
- * NOTE: <b>ri_body</b> is as returned by signed_descriptor_get_body: it might
- * not be NUL-terminated. */
-static char *
-munge_extrainfo_into_routerinfo(const char *ri_body,
- const signed_descriptor_t *ri,
- const signed_descriptor_t *ei)
-{
- char *out = NULL, *outp;
- int i;
- const char *router_sig;
- const char *ei_body = signed_descriptor_get_body(ei);
- size_t ri_len = ri->signed_descriptor_len;
- size_t ei_len = ei->signed_descriptor_len;
- if (!ei_body)
- goto bail;
-
- outp = out = tor_malloc(ri_len+ei_len+1);
- if (!(router_sig = tor_memstr(ri_body, ri_len, "\nrouter-signature")))
- goto bail;
- ++router_sig;
- memcpy(out, ri_body, router_sig-ri_body);
- outp += router_sig-ri_body;
-
- for (i=0; i < 2; ++i) {
- const char *kwd = i ? "\nwrite-history " : "\nread-history ";
- const char *cp, *eol;
- if (!(cp = tor_memstr(ei_body, ei_len, kwd)))
- continue;
- ++cp;
- if (!(eol = memchr(cp, '\n', ei_len - (cp-ei_body))))
- continue;
- memcpy(outp, cp, eol-cp+1);
- outp += eol-cp+1;
- }
- memcpy(outp, router_sig, ri_len - (router_sig-ri_body));
- *outp++ = '\0';
- tor_assert(outp-out < (int)(ri_len+ei_len+1));
-
- return out;
- bail:
- tor_free(out);
- return tor_strndup(ri_body, ri->signed_descriptor_len);
-}
-
-/** Implementation helper for GETINFO: answers requests for information about
- * which ports are bound. */
-static int
-getinfo_helper_listeners(control_connection_t *control_conn,
- const char *question,
- char **answer, const char **errmsg)
-{
- int type;
- smartlist_t *res;
-
- (void)control_conn;
- (void)errmsg;
-
- if (!strcmp(question, "net/listeners/or"))
- type = CONN_TYPE_OR_LISTENER;
- else if (!strcmp(question, "net/listeners/extor"))
- type = CONN_TYPE_EXT_OR_LISTENER;
- else if (!strcmp(question, "net/listeners/dir"))
- type = CONN_TYPE_DIR_LISTENER;
- else if (!strcmp(question, "net/listeners/socks"))
- type = CONN_TYPE_AP_LISTENER;
- else if (!strcmp(question, "net/listeners/trans"))
- type = CONN_TYPE_AP_TRANS_LISTENER;
- else if (!strcmp(question, "net/listeners/natd"))
- type = CONN_TYPE_AP_NATD_LISTENER;
- else if (!strcmp(question, "net/listeners/httptunnel"))
- type = CONN_TYPE_AP_HTTP_CONNECT_LISTENER;
- else if (!strcmp(question, "net/listeners/dns"))
- type = CONN_TYPE_AP_DNS_LISTENER;
- else if (!strcmp(question, "net/listeners/control"))
- type = CONN_TYPE_CONTROL_LISTENER;
- else
- return 0; /* unknown key */
-
- res = smartlist_new();
- SMARTLIST_FOREACH_BEGIN(get_connection_array(), connection_t *, conn) {
- struct sockaddr_storage ss;
- socklen_t ss_len = sizeof(ss);
-
- if (conn->type != type || conn->marked_for_close || !SOCKET_OK(conn->s))
- continue;
-
- if (getsockname(conn->s, (struct sockaddr *)&ss, &ss_len) < 0) {
- smartlist_add_asprintf(res, "%s:%d", conn->address, (int)conn->port);
- } else {
- char *tmp = tor_sockaddr_to_str((struct sockaddr *)&ss);
- smartlist_add(res, esc_for_log(tmp));
- tor_free(tmp);
- }
-
- } SMARTLIST_FOREACH_END(conn);
-
- *answer = smartlist_join_strings(res, " ", 0, NULL);
-
- SMARTLIST_FOREACH(res, char *, cp, tor_free(cp));
- smartlist_free(res);
- return 0;
-}
-
-/** Implementation helper for GETINFO: answers requests for information about
- * the current time in both local and UTC forms. */
-STATIC int
-getinfo_helper_current_time(control_connection_t *control_conn,
- const char *question,
- char **answer, const char **errmsg)
-{
- (void)control_conn;
- (void)errmsg;
-
- struct timeval now;
- tor_gettimeofday(&now);
- char timebuf[ISO_TIME_LEN+1];
-
- if (!strcmp(question, "current-time/local"))
- format_local_iso_time_nospace(timebuf, (time_t)now.tv_sec);
- else if (!strcmp(question, "current-time/utc"))
- format_iso_time_nospace(timebuf, (time_t)now.tv_sec);
- else
- return 0;
-
- *answer = tor_strdup(timebuf);
- return 0;
-}
-
-/** Implementation helper for GETINFO: knows the answers for questions about
- * directory information. */
-STATIC int
-getinfo_helper_dir(control_connection_t *control_conn,
- const char *question, char **answer,
- const char **errmsg)
-{
- (void) control_conn;
- if (!strcmpstart(question, "desc/id/")) {
- const routerinfo_t *ri = NULL;
- const node_t *node = node_get_by_hex_id(question+strlen("desc/id/"), 0);
- if (node)
- ri = node->ri;
- if (ri) {
- const char *body = signed_descriptor_get_body(&ri->cache_info);
- if (body)
- *answer = tor_strndup(body, ri->cache_info.signed_descriptor_len);
- } else if (! we_fetch_router_descriptors(get_options())) {
- /* Descriptors won't be available, provide proper error */
- *errmsg = "We fetch microdescriptors, not router "
- "descriptors. You'll need to use md/id/* "
- "instead of desc/id/*.";
- return 0;
- }
- } else if (!strcmpstart(question, "desc/name/")) {
- const routerinfo_t *ri = NULL;
- /* XXX Setting 'warn_if_unnamed' here is a bit silly -- the
- * warning goes to the user, not to the controller. */
- const node_t *node =
- node_get_by_nickname(question+strlen("desc/name/"), 0);
- if (node)
- ri = node->ri;
- if (ri) {
- const char *body = signed_descriptor_get_body(&ri->cache_info);
- if (body)
- *answer = tor_strndup(body, ri->cache_info.signed_descriptor_len);
- } else if (! we_fetch_router_descriptors(get_options())) {
- /* Descriptors won't be available, provide proper error */
- *errmsg = "We fetch microdescriptors, not router "
- "descriptors. You'll need to use md/name/* "
- "instead of desc/name/*.";
- return 0;
- }
- } else if (!strcmp(question, "desc/download-enabled")) {
- int r = we_fetch_router_descriptors(get_options());
- tor_asprintf(answer, "%d", !!r);
- } else if (!strcmp(question, "desc/all-recent")) {
- routerlist_t *routerlist = router_get_routerlist();
- smartlist_t *sl = smartlist_new();
- if (routerlist && routerlist->routers) {
- SMARTLIST_FOREACH(routerlist->routers, const routerinfo_t *, ri,
- {
- const char *body = signed_descriptor_get_body(&ri->cache_info);
- if (body)
- smartlist_add(sl,
- tor_strndup(body, ri->cache_info.signed_descriptor_len));
- });
- }
- *answer = smartlist_join_strings(sl, "", 0, NULL);
- SMARTLIST_FOREACH(sl, char *, c, tor_free(c));
- smartlist_free(sl);
- } else if (!strcmp(question, "desc/all-recent-extrainfo-hack")) {
- /* XXXX Remove this once Torstat asks for extrainfos. */
- routerlist_t *routerlist = router_get_routerlist();
- smartlist_t *sl = smartlist_new();
- if (routerlist && routerlist->routers) {
- SMARTLIST_FOREACH_BEGIN(routerlist->routers, const routerinfo_t *, ri) {
- const char *body = signed_descriptor_get_body(&ri->cache_info);
- signed_descriptor_t *ei = extrainfo_get_by_descriptor_digest(
- ri->cache_info.extra_info_digest);
- if (ei && body) {
- smartlist_add(sl, munge_extrainfo_into_routerinfo(body,
- &ri->cache_info, ei));
- } else if (body) {
- smartlist_add(sl,
- tor_strndup(body, ri->cache_info.signed_descriptor_len));
- }
- } SMARTLIST_FOREACH_END(ri);
- }
- *answer = smartlist_join_strings(sl, "", 0, NULL);
- SMARTLIST_FOREACH(sl, char *, c, tor_free(c));
- smartlist_free(sl);
- } else if (!strcmpstart(question, "hs/client/desc/id/")) {
- hostname_type_t addr_type;
-
- question += strlen("hs/client/desc/id/");
- if (rend_valid_v2_service_id(question)) {
- addr_type = ONION_V2_HOSTNAME;
- } else if (hs_address_is_valid(question)) {
- addr_type = ONION_V3_HOSTNAME;
- } else {
- *errmsg = "Invalid address";
- return -1;
- }
-
- if (addr_type == ONION_V2_HOSTNAME) {
- rend_cache_entry_t *e = NULL;
- if (!rend_cache_lookup_entry(question, -1, &e)) {
- /* Descriptor found in cache */
- *answer = tor_strdup(e->desc);
- } else {
- *errmsg = "Not found in cache";
- return -1;
- }
- } else {
- ed25519_public_key_t service_pk;
- const char *desc;
-
- /* The check before this if/else makes sure of this. */
- tor_assert(addr_type == ONION_V3_HOSTNAME);
-
- if (hs_parse_address(question, &service_pk, NULL, NULL) < 0) {
- *errmsg = "Invalid v3 address";
- return -1;
- }
-
- desc = hs_cache_lookup_encoded_as_client(&service_pk);
- if (desc) {
- *answer = tor_strdup(desc);
- } else {
- *errmsg = "Not found in cache";
- return -1;
- }
- }
- } else if (!strcmpstart(question, "hs/service/desc/id/")) {
- hostname_type_t addr_type;
-
- question += strlen("hs/service/desc/id/");
- if (rend_valid_v2_service_id(question)) {
- addr_type = ONION_V2_HOSTNAME;
- } else if (hs_address_is_valid(question)) {
- addr_type = ONION_V3_HOSTNAME;
- } else {
- *errmsg = "Invalid address";
- return -1;
- }
- rend_cache_entry_t *e = NULL;
-
- if (addr_type == ONION_V2_HOSTNAME) {
- if (!rend_cache_lookup_v2_desc_as_service(question, &e)) {
- /* Descriptor found in cache */
- *answer = tor_strdup(e->desc);
- } else {
- *errmsg = "Not found in cache";
- return -1;
- }
- } else {
- ed25519_public_key_t service_pk;
- char *desc;
-
- /* The check before this if/else makes sure of this. */
- tor_assert(addr_type == ONION_V3_HOSTNAME);
-
- if (hs_parse_address(question, &service_pk, NULL, NULL) < 0) {
- *errmsg = "Invalid v3 address";
- return -1;
- }
-
- desc = hs_service_lookup_current_desc(&service_pk);
- if (desc) {
- /* Newly allocated string, we have ownership. */
- *answer = desc;
- } else {
- *errmsg = "Not found in cache";
- return -1;
- }
- }
- } else if (!strcmp(question, "md/all")) {
- const smartlist_t *nodes = nodelist_get_list();
- tor_assert(nodes);
-
- if (smartlist_len(nodes) == 0) {
- *answer = tor_strdup("");
- return 0;
- }
-
- smartlist_t *microdescs = smartlist_new();
-
- SMARTLIST_FOREACH_BEGIN(nodes, node_t *, n) {
- if (n->md && n->md->body) {
- char *copy = tor_strndup(n->md->body, n->md->bodylen);
- smartlist_add(microdescs, copy);
- }
- } SMARTLIST_FOREACH_END(n);
-
- *answer = smartlist_join_strings(microdescs, "", 0, NULL);
- SMARTLIST_FOREACH(microdescs, char *, md, tor_free(md));
- smartlist_free(microdescs);
- } else if (!strcmpstart(question, "md/id/")) {
- const node_t *node = node_get_by_hex_id(question+strlen("md/id/"), 0);
- const microdesc_t *md = NULL;
- if (node) md = node->md;
- if (md && md->body) {
- *answer = tor_strndup(md->body, md->bodylen);
- }
- } else if (!strcmpstart(question, "md/name/")) {
- /* XXX Setting 'warn_if_unnamed' here is a bit silly -- the
- * warning goes to the user, not to the controller. */
- const node_t *node = node_get_by_nickname(question+strlen("md/name/"), 0);
- /* XXXX duplicated code */
- const microdesc_t *md = NULL;
- if (node) md = node->md;
- if (md && md->body) {
- *answer = tor_strndup(md->body, md->bodylen);
- }
- } else if (!strcmp(question, "md/download-enabled")) {
- int r = we_fetch_microdescriptors(get_options());
- tor_asprintf(answer, "%d", !!r);
- } else if (!strcmpstart(question, "desc-annotations/id/")) {
- const routerinfo_t *ri = NULL;
- const node_t *node =
- node_get_by_hex_id(question+strlen("desc-annotations/id/"), 0);
- if (node)
- ri = node->ri;
- if (ri) {
- const char *annotations =
- signed_descriptor_get_annotations(&ri->cache_info);
- if (annotations)
- *answer = tor_strndup(annotations,
- ri->cache_info.annotations_len);
- }
- } else if (!strcmpstart(question, "dir/server/")) {
- size_t answer_len = 0;
- char *url = NULL;
- smartlist_t *descs = smartlist_new();
- const char *msg;
- int res;
- char *cp;
- tor_asprintf(&url, "/tor/%s", question+4);
- res = dirserv_get_routerdescs(descs, url, &msg);
- if (res) {
- log_warn(LD_CONTROL, "getinfo '%s': %s", question, msg);
- smartlist_free(descs);
- tor_free(url);
- *errmsg = msg;
- return -1;
- }
- SMARTLIST_FOREACH(descs, signed_descriptor_t *, sd,
- answer_len += sd->signed_descriptor_len);
- cp = *answer = tor_malloc(answer_len+1);
- SMARTLIST_FOREACH(descs, signed_descriptor_t *, sd,
- {
- memcpy(cp, signed_descriptor_get_body(sd),
- sd->signed_descriptor_len);
- cp += sd->signed_descriptor_len;
- });
- *cp = '\0';
- tor_free(url);
- smartlist_free(descs);
- } else if (!strcmpstart(question, "dir/status/")) {
- *answer = tor_strdup("");
- } else if (!strcmp(question, "dir/status-vote/current/consensus")) { /* v3 */
- if (we_want_to_fetch_flavor(get_options(), FLAV_NS)) {
- const cached_dir_t *consensus = dirserv_get_consensus("ns");
- if (consensus)
- *answer = tor_strdup(consensus->dir);
- }
- if (!*answer) { /* try loading it from disk */
- *answer = networkstatus_read_cached_consensus("ns");
- if (!*answer) { /* generate an error */
- *errmsg = "Could not open cached consensus. "
- "Make sure FetchUselessDescriptors is set to 1.";
- return -1;
- }
- }
- } else if (!strcmp(question, "network-status")) { /* v1 */
- static int network_status_warned = 0;
- if (!network_status_warned) {
- log_warn(LD_CONTROL, "GETINFO network-status is deprecated; it will "
- "go away in a future version of Tor.");
- network_status_warned = 1;
- }
- routerlist_t *routerlist = router_get_routerlist();
- if (!routerlist || !routerlist->routers ||
- list_server_status_v1(routerlist->routers, answer, 1) < 0) {
- return -1;
- }
- } else if (!strcmpstart(question, "extra-info/digest/")) {
- question += strlen("extra-info/digest/");
- if (strlen(question) == HEX_DIGEST_LEN) {
- char d[DIGEST_LEN];
- signed_descriptor_t *sd = NULL;
- if (base16_decode(d, sizeof(d), question, strlen(question))
- == sizeof(d)) {
- /* XXXX this test should move into extrainfo_get_by_descriptor_digest,
- * but I don't want to risk affecting other parts of the code,
- * especially since the rules for using our own extrainfo (including
- * when it might be freed) are different from those for using one
- * we have downloaded. */
- if (router_extrainfo_digest_is_me(d))
- sd = &(router_get_my_extrainfo()->cache_info);
- else
- sd = extrainfo_get_by_descriptor_digest(d);
- }
- if (sd) {
- const char *body = signed_descriptor_get_body(sd);
- if (body)
- *answer = tor_strndup(body, sd->signed_descriptor_len);
- }
- }
- }
-
- return 0;
-}
-
-/** Given a smartlist of 20-byte digests, return a newly allocated string
- * containing each of those digests in order, formatted in HEX, and terminated
- * with a newline. */
-static char *
-digest_list_to_string(const smartlist_t *sl)
-{
- int len;
- char *result, *s;
-
- /* Allow for newlines, and a \0 at the end */
- len = smartlist_len(sl) * (HEX_DIGEST_LEN + 1) + 1;
- result = tor_malloc_zero(len);
-
- s = result;
- SMARTLIST_FOREACH_BEGIN(sl, const char *, digest) {
- base16_encode(s, HEX_DIGEST_LEN + 1, digest, DIGEST_LEN);
- s[HEX_DIGEST_LEN] = '\n';
- s += HEX_DIGEST_LEN + 1;
- } SMARTLIST_FOREACH_END(digest);
- *s = '\0';
-
- return result;
-}
-
-/** Turn a download_status_t into a human-readable description in a newly
- * allocated string. The format is specified in control-spec.txt, under
- * the documentation for "GETINFO download/..." . */
-static char *
-download_status_to_string(const download_status_t *dl)
-{
- char *rv = NULL;
- char tbuf[ISO_TIME_LEN+1];
- const char *schedule_str, *want_authority_str;
- const char *increment_on_str, *backoff_str;
-
- if (dl) {
- /* Get some substrings of the eventual output ready */
- format_iso_time(tbuf, download_status_get_next_attempt_at(dl));
-
- switch (dl->schedule) {
- case DL_SCHED_GENERIC:
- schedule_str = "DL_SCHED_GENERIC";
- break;
- case DL_SCHED_CONSENSUS:
- schedule_str = "DL_SCHED_CONSENSUS";
- break;
- case DL_SCHED_BRIDGE:
- schedule_str = "DL_SCHED_BRIDGE";
- break;
- default:
- schedule_str = "unknown";
- break;
- }
-
- switch (dl->want_authority) {
- case DL_WANT_ANY_DIRSERVER:
- want_authority_str = "DL_WANT_ANY_DIRSERVER";
- break;
- case DL_WANT_AUTHORITY:
- want_authority_str = "DL_WANT_AUTHORITY";
- break;
- default:
- want_authority_str = "unknown";
- break;
- }
-
- switch (dl->increment_on) {
- case DL_SCHED_INCREMENT_FAILURE:
- increment_on_str = "DL_SCHED_INCREMENT_FAILURE";
- break;
- case DL_SCHED_INCREMENT_ATTEMPT:
- increment_on_str = "DL_SCHED_INCREMENT_ATTEMPT";
- break;
- default:
- increment_on_str = "unknown";
- break;
- }
-
- backoff_str = "DL_SCHED_RANDOM_EXPONENTIAL";
-
- /* Now assemble them */
- tor_asprintf(&rv,
- "next-attempt-at %s\n"
- "n-download-failures %u\n"
- "n-download-attempts %u\n"
- "schedule %s\n"
- "want-authority %s\n"
- "increment-on %s\n"
- "backoff %s\n"
- "last-backoff-position %u\n"
- "last-delay-used %d\n",
- tbuf,
- dl->n_download_failures,
- dl->n_download_attempts,
- schedule_str,
- want_authority_str,
- increment_on_str,
- backoff_str,
- dl->last_backoff_position,
- dl->last_delay_used);
- }
-
- return rv;
-}
-
-/** Handle the consensus download cases for getinfo_helper_downloads() */
-STATIC void
-getinfo_helper_downloads_networkstatus(const char *flavor,
- download_status_t **dl_to_emit,
- const char **errmsg)
-{
- /*
- * We get the one for the current bootstrapped status by default, or
- * take an extra /bootstrap or /running suffix
- */
- if (strcmp(flavor, "ns") == 0) {
- *dl_to_emit = networkstatus_get_dl_status_by_flavor(FLAV_NS);
- } else if (strcmp(flavor, "ns/bootstrap") == 0) {
- *dl_to_emit = networkstatus_get_dl_status_by_flavor_bootstrap(FLAV_NS);
- } else if (strcmp(flavor, "ns/running") == 0 ) {
- *dl_to_emit = networkstatus_get_dl_status_by_flavor_running(FLAV_NS);
- } else if (strcmp(flavor, "microdesc") == 0) {
- *dl_to_emit = networkstatus_get_dl_status_by_flavor(FLAV_MICRODESC);
- } else if (strcmp(flavor, "microdesc/bootstrap") == 0) {
- *dl_to_emit =
- networkstatus_get_dl_status_by_flavor_bootstrap(FLAV_MICRODESC);
- } else if (strcmp(flavor, "microdesc/running") == 0) {
- *dl_to_emit =
- networkstatus_get_dl_status_by_flavor_running(FLAV_MICRODESC);
- } else {
- *errmsg = "Unknown flavor";
- }
-}
-
-/** Handle the cert download cases for getinfo_helper_downloads() */
-STATIC void
-getinfo_helper_downloads_cert(const char *fp_sk_req,
- download_status_t **dl_to_emit,
- smartlist_t **digest_list,
- const char **errmsg)
-{
- const char *sk_req;
- char id_digest[DIGEST_LEN];
- char sk_digest[DIGEST_LEN];
-
- /*
- * We have to handle four cases; fp_sk_req is the request with
- * a prefix of "downloads/cert/" snipped off.
- *
- * Case 1: fp_sk_req = "fps"
- * - We should emit a digest_list with a list of all the identity
- * fingerprints that can be queried for certificate download status;
- * get it by calling list_authority_ids_with_downloads().
- *
- * Case 2: fp_sk_req = "fp/<fp>" for some fingerprint fp
- * - We want the default certificate for this identity fingerprint's
- * download status; this is the download we get from URLs starting
- * in /fp/ on the directory server. We can get it with
- * id_only_download_status_for_authority_id().
- *
- * Case 3: fp_sk_req = "fp/<fp>/sks" for some fingerprint fp
- * - We want a list of all signing key digests for this identity
- * fingerprint which can be queried for certificate download status.
- * Get it with list_sk_digests_for_authority_id().
- *
- * Case 4: fp_sk_req = "fp/<fp>/<sk>" for some fingerprint fp and
- * signing key digest sk
- * - We want the download status for the certificate for this specific
- * signing key and fingerprint. These correspond to the ones we get
- * from URLs starting in /fp-sk/ on the directory server. Get it with
- * list_sk_digests_for_authority_id().
- */
-
- if (strcmp(fp_sk_req, "fps") == 0) {
- *digest_list = list_authority_ids_with_downloads();
- if (!(*digest_list)) {
- *errmsg = "Failed to get list of authority identity digests (!)";
- }
- } else if (!strcmpstart(fp_sk_req, "fp/")) {
- fp_sk_req += strlen("fp/");
- /* Okay, look for another / to tell the fp from fp-sk cases */
- sk_req = strchr(fp_sk_req, '/');
- if (sk_req) {
- /* okay, split it here and try to parse <fp> */
- if (base16_decode(id_digest, DIGEST_LEN,
- fp_sk_req, sk_req - fp_sk_req) == DIGEST_LEN) {
- /* Skip past the '/' */
- ++sk_req;
- if (strcmp(sk_req, "sks") == 0) {
- /* We're asking for the list of signing key fingerprints */
- *digest_list = list_sk_digests_for_authority_id(id_digest);
- if (!(*digest_list)) {
- *errmsg = "Failed to get list of signing key digests for this "
- "authority identity digest";
- }
- } else {
- /* We've got a signing key digest */
- if (base16_decode(sk_digest, DIGEST_LEN,
- sk_req, strlen(sk_req)) == DIGEST_LEN) {
- *dl_to_emit =
- download_status_for_authority_id_and_sk(id_digest, sk_digest);
- if (!(*dl_to_emit)) {
- *errmsg = "Failed to get download status for this identity/"
- "signing key digest pair";
- }
- } else {
- *errmsg = "That didn't look like a signing key digest";
- }
- }
- } else {
- *errmsg = "That didn't look like an identity digest";
- }
- } else {
- /* We're either in downloads/certs/fp/<fp>, or we can't parse <fp> */
- if (strlen(fp_sk_req) == HEX_DIGEST_LEN) {
- if (base16_decode(id_digest, DIGEST_LEN,
- fp_sk_req, strlen(fp_sk_req)) == DIGEST_LEN) {
- *dl_to_emit = id_only_download_status_for_authority_id(id_digest);
- if (!(*dl_to_emit)) {
- *errmsg = "Failed to get download status for this authority "
- "identity digest";
- }
- } else {
- *errmsg = "That didn't look like a digest";
- }
- } else {
- *errmsg = "That didn't look like a digest";
- }
- }
- } else {
- *errmsg = "Unknown certificate download status query";
- }
-}
-
-/** Handle the routerdesc download cases for getinfo_helper_downloads() */
-STATIC void
-getinfo_helper_downloads_desc(const char *desc_req,
- download_status_t **dl_to_emit,
- smartlist_t **digest_list,
- const char **errmsg)
-{
- char desc_digest[DIGEST_LEN];
- /*
- * Two cases to handle here:
- *
- * Case 1: desc_req = "descs"
- * - Emit a list of all router descriptor digests, which we get by
- * calling router_get_descriptor_digests(); this can return NULL
- * if we have no current ns-flavor consensus.
- *
- * Case 2: desc_req = <fp>
- * - Check on the specified fingerprint and emit its download_status_t
- * using router_get_dl_status_by_descriptor_digest().
- */
-
- if (strcmp(desc_req, "descs") == 0) {
- *digest_list = router_get_descriptor_digests();
- if (!(*digest_list)) {
- *errmsg = "We don't seem to have a networkstatus-flavored consensus";
- }
- /*
- * Microdescs don't use the download_status_t mechanism, so we don't
- * answer queries about their downloads here; see microdesc.c.
- */
- } else if (strlen(desc_req) == HEX_DIGEST_LEN) {
- if (base16_decode(desc_digest, DIGEST_LEN,
- desc_req, strlen(desc_req)) == DIGEST_LEN) {
- /* Okay we got a digest-shaped thing; try asking for it */
- *dl_to_emit = router_get_dl_status_by_descriptor_digest(desc_digest);
- if (!(*dl_to_emit)) {
- *errmsg = "No such descriptor digest found";
- }
- } else {
- *errmsg = "That didn't look like a digest";
- }
- } else {
- *errmsg = "Unknown router descriptor download status query";
- }
-}
-
-/** Handle the bridge download cases for getinfo_helper_downloads() */
-STATIC void
-getinfo_helper_downloads_bridge(const char *bridge_req,
- download_status_t **dl_to_emit,
- smartlist_t **digest_list,
- const char **errmsg)
-{
- char bridge_digest[DIGEST_LEN];
- /*
- * Two cases to handle here:
- *
- * Case 1: bridge_req = "bridges"
- * - Emit a list of all bridge identity digests, which we get by
- * calling list_bridge_identities(); this can return NULL if we are
- * not using bridges.
- *
- * Case 2: bridge_req = <fp>
- * - Check on the specified fingerprint and emit its download_status_t
- * using get_bridge_dl_status_by_id().
- */
-
- if (strcmp(bridge_req, "bridges") == 0) {
- *digest_list = list_bridge_identities();
- if (!(*digest_list)) {
- *errmsg = "We don't seem to be using bridges";
- }
- } else if (strlen(bridge_req) == HEX_DIGEST_LEN) {
- if (base16_decode(bridge_digest, DIGEST_LEN,
- bridge_req, strlen(bridge_req)) == DIGEST_LEN) {
- /* Okay we got a digest-shaped thing; try asking for it */
- *dl_to_emit = get_bridge_dl_status_by_id(bridge_digest);
- if (!(*dl_to_emit)) {
- *errmsg = "No such bridge identity digest found";
- }
- } else {
- *errmsg = "That didn't look like a digest";
- }
- } else {
- *errmsg = "Unknown bridge descriptor download status query";
- }
-}
-
-/** Implementation helper for GETINFO: knows the answers for questions about
- * download status information. */
-STATIC int
-getinfo_helper_downloads(control_connection_t *control_conn,
- const char *question, char **answer,
- const char **errmsg)
-{
- download_status_t *dl_to_emit = NULL;
- smartlist_t *digest_list = NULL;
-
- /* Assert args are sane */
- tor_assert(control_conn != NULL);
- tor_assert(question != NULL);
- tor_assert(answer != NULL);
- tor_assert(errmsg != NULL);
-
- /* We check for this later to see if we should supply a default */
- *errmsg = NULL;
-
- /* Are we after networkstatus downloads? */
- if (!strcmpstart(question, "downloads/networkstatus/")) {
- getinfo_helper_downloads_networkstatus(
- question + strlen("downloads/networkstatus/"),
- &dl_to_emit, errmsg);
- /* Certificates? */
- } else if (!strcmpstart(question, "downloads/cert/")) {
- getinfo_helper_downloads_cert(
- question + strlen("downloads/cert/"),
- &dl_to_emit, &digest_list, errmsg);
- /* Router descriptors? */
- } else if (!strcmpstart(question, "downloads/desc/")) {
- getinfo_helper_downloads_desc(
- question + strlen("downloads/desc/"),
- &dl_to_emit, &digest_list, errmsg);
- /* Bridge descriptors? */
- } else if (!strcmpstart(question, "downloads/bridge/")) {
- getinfo_helper_downloads_bridge(
- question + strlen("downloads/bridge/"),
- &dl_to_emit, &digest_list, errmsg);
- } else {
- *errmsg = "Unknown download status query";
- }
-
- if (dl_to_emit) {
- *answer = download_status_to_string(dl_to_emit);
-
- return 0;
- } else if (digest_list) {
- *answer = digest_list_to_string(digest_list);
- SMARTLIST_FOREACH(digest_list, void *, s, tor_free(s));
- smartlist_free(digest_list);
-
- return 0;
- } else {
- if (!(*errmsg)) {
- *errmsg = "Unknown error";
- }
-
- return -1;
- }
-}
-
-/** Allocate and return a description of <b>circ</b>'s current status,
- * including its path (if any). */
-static char *
-circuit_describe_status_for_controller(origin_circuit_t *circ)
-{
- char *rv;
- smartlist_t *descparts = smartlist_new();
-
- {
- char *vpath = circuit_list_path_for_controller(circ);
- if (*vpath) {
- smartlist_add(descparts, vpath);
- } else {
- tor_free(vpath); /* empty path; don't put an extra space in the result */
- }
- }
-
- {
- cpath_build_state_t *build_state = circ->build_state;
- smartlist_t *flaglist = smartlist_new();
- char *flaglist_joined;
-
- if (build_state->onehop_tunnel)
- smartlist_add(flaglist, (void *)"ONEHOP_TUNNEL");
- if (build_state->is_internal)
- smartlist_add(flaglist, (void *)"IS_INTERNAL");
- if (build_state->need_capacity)
- smartlist_add(flaglist, (void *)"NEED_CAPACITY");
- if (build_state->need_uptime)
- smartlist_add(flaglist, (void *)"NEED_UPTIME");
-
- /* Only emit a BUILD_FLAGS argument if it will have a non-empty value. */
- if (smartlist_len(flaglist)) {
- flaglist_joined = smartlist_join_strings(flaglist, ",", 0, NULL);
-
- smartlist_add_asprintf(descparts, "BUILD_FLAGS=%s", flaglist_joined);
-
- tor_free(flaglist_joined);
- }
-
- smartlist_free(flaglist);
- }
-
- smartlist_add_asprintf(descparts, "PURPOSE=%s",
- circuit_purpose_to_controller_string(circ->base_.purpose));
-
- {
- const char *hs_state =
- circuit_purpose_to_controller_hs_state_string(circ->base_.purpose);
-
- if (hs_state != NULL) {
- smartlist_add_asprintf(descparts, "HS_STATE=%s", hs_state);
- }
- }
-
- if (circ->rend_data != NULL || circ->hs_ident != NULL) {
- char addr[HS_SERVICE_ADDR_LEN_BASE32 + 1];
- const char *onion_address;
- if (circ->rend_data) {
- onion_address = rend_data_get_address(circ->rend_data);
- } else {
- hs_build_address(&circ->hs_ident->identity_pk, HS_VERSION_THREE, addr);
- onion_address = addr;
- }
- smartlist_add_asprintf(descparts, "REND_QUERY=%s", onion_address);
- }
-
- {
- char tbuf[ISO_TIME_USEC_LEN+1];
- format_iso_time_nospace_usec(tbuf, &circ->base_.timestamp_created);
-
- smartlist_add_asprintf(descparts, "TIME_CREATED=%s", tbuf);
- }
-
- // Show username and/or password if available.
- if (circ->socks_username_len > 0) {
- char* socks_username_escaped = esc_for_log_len(circ->socks_username,
- (size_t) circ->socks_username_len);
- smartlist_add_asprintf(descparts, "SOCKS_USERNAME=%s",
- socks_username_escaped);
- tor_free(socks_username_escaped);
- }
- if (circ->socks_password_len > 0) {
- char* socks_password_escaped = esc_for_log_len(circ->socks_password,
- (size_t) circ->socks_password_len);
- smartlist_add_asprintf(descparts, "SOCKS_PASSWORD=%s",
- socks_password_escaped);
- tor_free(socks_password_escaped);
- }
-
- rv = smartlist_join_strings(descparts, " ", 0, NULL);
-
- SMARTLIST_FOREACH(descparts, char *, cp, tor_free(cp));
- smartlist_free(descparts);
-
- return rv;
-}
-
-/** Implementation helper for GETINFO: knows how to generate summaries of the
- * current states of things we send events about. */
-static int
-getinfo_helper_events(control_connection_t *control_conn,
- const char *question, char **answer,
- const char **errmsg)
-{
- const or_options_t *options = get_options();
- (void) control_conn;
- if (!strcmp(question, "circuit-status")) {
- smartlist_t *status = smartlist_new();
- SMARTLIST_FOREACH_BEGIN(circuit_get_global_list(), circuit_t *, circ_) {
- origin_circuit_t *circ;
- char *circdesc;
- const char *state;
- if (! CIRCUIT_IS_ORIGIN(circ_) || circ_->marked_for_close)
- continue;
- circ = TO_ORIGIN_CIRCUIT(circ_);
-
- if (circ->base_.state == CIRCUIT_STATE_OPEN)
- state = "BUILT";
- else if (circ->base_.state == CIRCUIT_STATE_GUARD_WAIT)
- state = "GUARD_WAIT";
- else if (circ->cpath)
- state = "EXTENDED";
- else
- state = "LAUNCHED";
-
- circdesc = circuit_describe_status_for_controller(circ);
-
- smartlist_add_asprintf(status, "%lu %s%s%s",
- (unsigned long)circ->global_identifier,
- state, *circdesc ? " " : "", circdesc);
- tor_free(circdesc);
- }
- SMARTLIST_FOREACH_END(circ_);
- *answer = smartlist_join_strings(status, "\r\n", 0, NULL);
- SMARTLIST_FOREACH(status, char *, cp, tor_free(cp));
- smartlist_free(status);
- } else if (!strcmp(question, "stream-status")) {
- smartlist_t *conns = get_connection_array();
- smartlist_t *status = smartlist_new();
- char buf[256];
- SMARTLIST_FOREACH_BEGIN(conns, connection_t *, base_conn) {
- const char *state;
- entry_connection_t *conn;
- circuit_t *circ;
- origin_circuit_t *origin_circ = NULL;
- if (base_conn->type != CONN_TYPE_AP ||
- base_conn->marked_for_close ||
- base_conn->state == AP_CONN_STATE_SOCKS_WAIT ||
- base_conn->state == AP_CONN_STATE_NATD_WAIT)
- continue;
- conn = TO_ENTRY_CONN(base_conn);
- switch (base_conn->state)
- {
- case AP_CONN_STATE_CONTROLLER_WAIT:
- case AP_CONN_STATE_CIRCUIT_WAIT:
- if (conn->socks_request &&
- SOCKS_COMMAND_IS_RESOLVE(conn->socks_request->command))
- state = "NEWRESOLVE";
- else
- state = "NEW";
- break;
- case AP_CONN_STATE_RENDDESC_WAIT:
- case AP_CONN_STATE_CONNECT_WAIT:
- state = "SENTCONNECT"; break;
- case AP_CONN_STATE_RESOLVE_WAIT:
- state = "SENTRESOLVE"; break;
- case AP_CONN_STATE_OPEN:
- state = "SUCCEEDED"; break;
- default:
- log_warn(LD_BUG, "Asked for stream in unknown state %d",
- base_conn->state);
- continue;
- }
- circ = circuit_get_by_edge_conn(ENTRY_TO_EDGE_CONN(conn));
- if (circ && CIRCUIT_IS_ORIGIN(circ))
- origin_circ = TO_ORIGIN_CIRCUIT(circ);
- write_stream_target_to_buf(conn, buf, sizeof(buf));
- smartlist_add_asprintf(status, "%lu %s %lu %s",
- (unsigned long) base_conn->global_identifier,state,
- origin_circ?
- (unsigned long)origin_circ->global_identifier : 0ul,
- buf);
- } SMARTLIST_FOREACH_END(base_conn);
- *answer = smartlist_join_strings(status, "\r\n", 0, NULL);
- SMARTLIST_FOREACH(status, char *, cp, tor_free(cp));
- smartlist_free(status);
- } else if (!strcmp(question, "orconn-status")) {
- smartlist_t *conns = get_connection_array();
- smartlist_t *status = smartlist_new();
- SMARTLIST_FOREACH_BEGIN(conns, connection_t *, base_conn) {
- const char *state;
- char name[128];
- or_connection_t *conn;
- if (base_conn->type != CONN_TYPE_OR || base_conn->marked_for_close)
- continue;
- conn = TO_OR_CONN(base_conn);
- if (conn->base_.state == OR_CONN_STATE_OPEN)
- state = "CONNECTED";
- else if (conn->nickname)
- state = "LAUNCHED";
- else
- state = "NEW";
- orconn_target_get_name(name, sizeof(name), conn);
- smartlist_add_asprintf(status, "%s %s", name, state);
- } SMARTLIST_FOREACH_END(base_conn);
- *answer = smartlist_join_strings(status, "\r\n", 0, NULL);
- SMARTLIST_FOREACH(status, char *, cp, tor_free(cp));
- smartlist_free(status);
- } else if (!strcmpstart(question, "address-mappings/")) {
- time_t min_e, max_e;
- smartlist_t *mappings;
- question += strlen("address-mappings/");
- if (!strcmp(question, "all")) {
- min_e = 0; max_e = TIME_MAX;
- } else if (!strcmp(question, "cache")) {
- min_e = 2; max_e = TIME_MAX;
- } else if (!strcmp(question, "config")) {
- min_e = 0; max_e = 0;
- } else if (!strcmp(question, "control")) {
- min_e = 1; max_e = 1;
- } else {
- return 0;
- }
- mappings = smartlist_new();
- addressmap_get_mappings(mappings, min_e, max_e, 1);
- *answer = smartlist_join_strings(mappings, "\r\n", 0, NULL);
- SMARTLIST_FOREACH(mappings, char *, cp, tor_free(cp));
- smartlist_free(mappings);
- } else if (!strcmpstart(question, "status/")) {
- /* Note that status/ is not a catch-all for events; there's only supposed
- * to be a status GETINFO if there's a corresponding STATUS event. */
- if (!strcmp(question, "status/circuit-established")) {
- *answer = tor_strdup(have_completed_a_circuit() ? "1" : "0");
- } else if (!strcmp(question, "status/enough-dir-info")) {
- *answer = tor_strdup(router_have_minimum_dir_info() ? "1" : "0");
- } else if (!strcmp(question, "status/good-server-descriptor") ||
- !strcmp(question, "status/accepted-server-descriptor")) {
- /* They're equivalent for now, until we can figure out how to make
- * good-server-descriptor be what we want. See comment in
- * control-spec.txt. */
- *answer = tor_strdup(directories_have_accepted_server_descriptor()
- ? "1" : "0");
- } else if (!strcmp(question, "status/reachability-succeeded/or")) {
- *answer = tor_strdup(check_whether_orport_reachable(options) ?
- "1" : "0");
- } else if (!strcmp(question, "status/reachability-succeeded/dir")) {
- *answer = tor_strdup(check_whether_dirport_reachable(options) ?
- "1" : "0");
- } else if (!strcmp(question, "status/reachability-succeeded")) {
- tor_asprintf(answer, "OR=%d DIR=%d",
- check_whether_orport_reachable(options) ? 1 : 0,
- check_whether_dirport_reachable(options) ? 1 : 0);
- } else if (!strcmp(question, "status/bootstrap-phase")) {
- *answer = tor_strdup(last_sent_bootstrap_message);
- } else if (!strcmpstart(question, "status/version/")) {
- int is_server = server_mode(options);
- networkstatus_t *c = networkstatus_get_latest_consensus();
- version_status_t status;
- const char *recommended;
- if (c) {
- recommended = is_server ? c->server_versions : c->client_versions;
- status = tor_version_is_obsolete(VERSION, recommended);
- } else {
- recommended = "?";
- status = VS_UNKNOWN;
- }
-
- if (!strcmp(question, "status/version/recommended")) {
- *answer = tor_strdup(recommended);
- return 0;
- }
- if (!strcmp(question, "status/version/current")) {
- switch (status)
- {
- case VS_RECOMMENDED: *answer = tor_strdup("recommended"); break;
- case VS_OLD: *answer = tor_strdup("obsolete"); break;
- case VS_NEW: *answer = tor_strdup("new"); break;
- case VS_NEW_IN_SERIES: *answer = tor_strdup("new in series"); break;
- case VS_UNRECOMMENDED: *answer = tor_strdup("unrecommended"); break;
- case VS_EMPTY: *answer = tor_strdup("none recommended"); break;
- case VS_UNKNOWN: *answer = tor_strdup("unknown"); break;
- default: tor_fragile_assert();
- }
- } else if (!strcmp(question, "status/version/num-versioning") ||
- !strcmp(question, "status/version/num-concurring")) {
- tor_asprintf(answer, "%d", get_n_authorities(V3_DIRINFO));
- log_warn(LD_GENERAL, "%s is deprecated; it no longer gives useful "
- "information", question);
- }
- } else if (!strcmp(question, "status/clients-seen")) {
- char *bridge_stats = geoip_get_bridge_stats_controller(time(NULL));
- if (!bridge_stats) {
- *errmsg = "No bridge-client stats available";
- return -1;
- }
- *answer = bridge_stats;
- } else if (!strcmp(question, "status/fresh-relay-descs")) {
- if (!server_mode(options)) {
- *errmsg = "Only relays have descriptors";
- return -1;
- }
- routerinfo_t *r;
- extrainfo_t *e;
- if (router_build_fresh_descriptor(&r, &e) < 0) {
- *errmsg = "Error generating descriptor";
- return -1;
- }
- size_t size = r->cache_info.signed_descriptor_len + 1;
- if (e) {
- size += e->cache_info.signed_descriptor_len + 1;
- }
- tor_assert(r->cache_info.signed_descriptor_len);
- char *descs = tor_malloc(size);
- char *cp = descs;
- memcpy(cp, signed_descriptor_get_body(&r->cache_info),
- r->cache_info.signed_descriptor_len);
- cp += r->cache_info.signed_descriptor_len - 1;
- if (e) {
- if (cp[0] == '\0') {
- cp[0] = '\n';
- } else if (cp[0] != '\n') {
- cp[1] = '\n';
- cp++;
- }
- memcpy(cp, signed_descriptor_get_body(&e->cache_info),
- e->cache_info.signed_descriptor_len);
- cp += e->cache_info.signed_descriptor_len - 1;
- }
- if (cp[0] == '\n') {
- cp[0] = '\0';
- } else if (cp[0] != '\0') {
- cp[1] = '\0';
- }
- *answer = descs;
- routerinfo_free(r);
- extrainfo_free(e);
- } else {
- return 0;
- }
- }
- return 0;
-}
-
-/** Implementation helper for GETINFO: knows how to enumerate hidden services
- * created via the control port. */
-STATIC int
-getinfo_helper_onions(control_connection_t *control_conn,
- const char *question, char **answer,
- const char **errmsg)
-{
- smartlist_t *onion_list = NULL;
- (void) errmsg; /* no errors from this method */
-
- if (control_conn && !strcmp(question, "onions/current")) {
- onion_list = control_conn->ephemeral_onion_services;
- } else if (!strcmp(question, "onions/detached")) {
- onion_list = detached_onion_services;
- } else {
- return 0;
- }
- if (!onion_list || smartlist_len(onion_list) == 0) {
- if (answer) {
- *answer = tor_strdup("");
- }
- } else {
- if (answer) {
- *answer = smartlist_join_strings(onion_list, "\r\n", 0, NULL);
- }
- }
-
- return 0;
-}
-
-/** Implementation helper for GETINFO: answers queries about network
- * liveness. */
-static int
-getinfo_helper_liveness(control_connection_t *control_conn,
- const char *question, char **answer,
- const char **errmsg)
-{
- (void)control_conn;
- (void)errmsg;
- if (strcmp(question, "network-liveness") == 0) {
- if (get_cached_network_liveness()) {
- *answer = tor_strdup("up");
- } else {
- *answer = tor_strdup("down");
- }
- }
-
- return 0;
-}
-
-/** Implementation helper for GETINFO: answers queries about shared random
- * value. */
-static int
-getinfo_helper_sr(control_connection_t *control_conn,
- const char *question, char **answer,
- const char **errmsg)
-{
- (void) control_conn;
- (void) errmsg;
-
- if (!strcmp(question, "sr/current")) {
- *answer = sr_get_current_for_control();
- } else if (!strcmp(question, "sr/previous")) {
- *answer = sr_get_previous_for_control();
- }
- /* Else statement here is unrecognized key so do nothing. */
-
- return 0;
-}
-
-/** Callback function for GETINFO: on a given control connection, try to
- * answer the question <b>q</b> and store the newly-allocated answer in
- * *<b>a</b>. If an internal error occurs, return -1 and optionally set
- * *<b>error_out</b> to point to an error message to be delivered to the
- * controller. On success, _or if the key is not recognized_, return 0. Do not
- * set <b>a</b> if the key is not recognized but you may set <b>error_out</b>
- * to improve the error message.
- */
-typedef int (*getinfo_helper_t)(control_connection_t *,
- const char *q, char **a,
- const char **error_out);
-
-/** A single item for the GETINFO question-to-answer-function table. */
-typedef struct getinfo_item_t {
- const char *varname; /**< The value (or prefix) of the question. */
- getinfo_helper_t fn; /**< The function that knows the answer: NULL if
- * this entry is documentation-only. */
- const char *desc; /**< Description of the variable. */
- int is_prefix; /** Must varname match exactly, or must it be a prefix? */
-} getinfo_item_t;
-
-#define ITEM(name, fn, desc) { name, getinfo_helper_##fn, desc, 0 }
-#define PREFIX(name, fn, desc) { name, getinfo_helper_##fn, desc, 1 }
-#define DOC(name, desc) { name, NULL, desc, 0 }
-
-/** Table mapping questions accepted by GETINFO to the functions that know how
- * to answer them. */
-static const getinfo_item_t getinfo_items[] = {
- ITEM("version", misc, "The current version of Tor."),
- ITEM("bw-event-cache", misc, "Cached BW events for a short interval."),
- ITEM("config-file", misc, "Current location of the \"torrc\" file."),
- ITEM("config-defaults-file", misc, "Current location of the defaults file."),
- ITEM("config-text", misc,
- "Return the string that would be written by a saveconf command."),
- ITEM("config-can-saveconf", misc,
- "Is it possible to save the configuration to the \"torrc\" file?"),
- ITEM("accounting/bytes", accounting,
- "Number of bytes read/written so far in the accounting interval."),
- ITEM("accounting/bytes-left", accounting,
- "Number of bytes left to write/read so far in the accounting interval."),
- ITEM("accounting/enabled", accounting, "Is accounting currently enabled?"),
- ITEM("accounting/hibernating", accounting, "Are we hibernating or awake?"),
- ITEM("accounting/interval-start", accounting,
- "Time when the accounting period starts."),
- ITEM("accounting/interval-end", accounting,
- "Time when the accounting period ends."),
- ITEM("accounting/interval-wake", accounting,
- "Time to wake up in this accounting period."),
- ITEM("helper-nodes", entry_guards, NULL), /* deprecated */
- ITEM("entry-guards", entry_guards,
- "Which nodes are we using as entry guards?"),
- ITEM("fingerprint", misc, NULL),
- PREFIX("config/", config, "Current configuration values."),
- DOC("config/names",
- "List of configuration options, types, and documentation."),
- DOC("config/defaults",
- "List of default values for configuration options. "
- "See also config/names"),
- PREFIX("current-time/", current_time, "Current time."),
- DOC("current-time/local", "Current time on the local system."),
- DOC("current-time/utc", "Current UTC time."),
- PREFIX("downloads/networkstatus/", downloads,
- "Download statuses for networkstatus objects"),
- DOC("downloads/networkstatus/ns",
- "Download status for current-mode networkstatus download"),
- DOC("downloads/networkstatus/ns/bootstrap",
- "Download status for bootstrap-time networkstatus download"),
- DOC("downloads/networkstatus/ns/running",
- "Download status for run-time networkstatus download"),
- DOC("downloads/networkstatus/microdesc",
- "Download status for current-mode microdesc download"),
- DOC("downloads/networkstatus/microdesc/bootstrap",
- "Download status for bootstrap-time microdesc download"),
- DOC("downloads/networkstatus/microdesc/running",
- "Download status for run-time microdesc download"),
- PREFIX("downloads/cert/", downloads,
- "Download statuses for certificates, by id fingerprint and "
- "signing key"),
- DOC("downloads/cert/fps",
- "List of authority fingerprints for which any download statuses "
- "exist"),
- DOC("downloads/cert/fp/<fp>",
- "Download status for <fp> with the default signing key; corresponds "
- "to /fp/ URLs on directory server."),
- DOC("downloads/cert/fp/<fp>/sks",
- "List of signing keys for which specific download statuses are "
- "available for this id fingerprint"),
- DOC("downloads/cert/fp/<fp>/<sk>",
- "Download status for <fp> with signing key <sk>; corresponds "
- "to /fp-sk/ URLs on directory server."),
- PREFIX("downloads/desc/", downloads,
- "Download statuses for router descriptors, by descriptor digest"),
- DOC("downloads/desc/descs",
- "Return a list of known router descriptor digests"),
- DOC("downloads/desc/<desc>",
- "Return a download status for a given descriptor digest"),
- PREFIX("downloads/bridge/", downloads,
- "Download statuses for bridge descriptors, by bridge identity "
- "digest"),
- DOC("downloads/bridge/bridges",
- "Return a list of configured bridge identity digests with download "
- "statuses"),
- DOC("downloads/bridge/<desc>",
- "Return a download status for a given bridge identity digest"),
- ITEM("info/names", misc,
- "List of GETINFO options, types, and documentation."),
- ITEM("events/names", misc,
- "Events that the controller can ask for with SETEVENTS."),
- ITEM("signal/names", misc, "Signal names recognized by the SIGNAL command"),
- ITEM("features/names", misc, "What arguments can USEFEATURE take?"),
- PREFIX("desc/id/", dir, "Router descriptors by ID."),
- PREFIX("desc/name/", dir, "Router descriptors by nickname."),
- ITEM("desc/all-recent", dir,
- "All non-expired, non-superseded router descriptors."),
- ITEM("desc/download-enabled", dir,
- "Do we try to download router descriptors?"),
- ITEM("desc/all-recent-extrainfo-hack", dir, NULL), /* Hack. */
- ITEM("md/all", dir, "All known microdescriptors."),
- PREFIX("md/id/", dir, "Microdescriptors by ID"),
- PREFIX("md/name/", dir, "Microdescriptors by name"),
- ITEM("md/download-enabled", dir,
- "Do we try to download microdescriptors?"),
- PREFIX("extra-info/digest/", dir, "Extra-info documents by digest."),
- PREFIX("hs/client/desc/id", dir,
- "Hidden Service descriptor in client's cache by onion."),
- PREFIX("hs/service/desc/id/", dir,
- "Hidden Service descriptor in services's cache by onion."),
- PREFIX("net/listeners/", listeners, "Bound addresses by type"),
- ITEM("ns/all", networkstatus,
- "Brief summary of router status (v2 directory format)"),
- PREFIX("ns/id/", networkstatus,
- "Brief summary of router status by ID (v2 directory format)."),
- PREFIX("ns/name/", networkstatus,
- "Brief summary of router status by nickname (v2 directory format)."),
- PREFIX("ns/purpose/", networkstatus,
- "Brief summary of router status by purpose (v2 directory format)."),
- PREFIX("consensus/", networkstatus,
- "Information about and from the ns consensus."),
- ITEM("network-status", dir,
- "Brief summary of router status (v1 directory format)"),
- ITEM("network-liveness", liveness,
- "Current opinion on whether the network is live"),
- ITEM("circuit-status", events, "List of current circuits originating here."),
- ITEM("stream-status", events,"List of current streams."),
- ITEM("orconn-status", events, "A list of current OR connections."),
- ITEM("dormant", misc,
- "Is Tor dormant (not building circuits because it's idle)?"),
- PREFIX("address-mappings/", events, NULL),
- DOC("address-mappings/all", "Current address mappings."),
- DOC("address-mappings/cache", "Current cached DNS replies."),
- DOC("address-mappings/config",
- "Current address mappings from configuration."),
- DOC("address-mappings/control", "Current address mappings from controller."),
- PREFIX("status/", events, NULL),
- DOC("status/circuit-established",
- "Whether we think client functionality is working."),
- DOC("status/enough-dir-info",
- "Whether we have enough up-to-date directory information to build "
- "circuits."),
- DOC("status/bootstrap-phase",
- "The last bootstrap phase status event that Tor sent."),
- DOC("status/clients-seen",
- "Breakdown of client countries seen by a bridge."),
- DOC("status/fresh-relay-descs",
- "A fresh relay/ei descriptor pair for Tor's current state. Not stored."),
- DOC("status/version/recommended", "List of currently recommended versions."),
- DOC("status/version/current", "Status of the current version."),
- DOC("status/version/num-versioning", "Number of versioning authorities."),
- DOC("status/version/num-concurring",
- "Number of versioning authorities agreeing on the status of the "
- "current version"),
- ITEM("address", misc, "IP address of this Tor host, if we can guess it."),
- ITEM("traffic/read", misc,"Bytes read since the process was started."),
- ITEM("traffic/written", misc,
- "Bytes written since the process was started."),
- ITEM("uptime", misc, "Uptime of the Tor daemon in seconds."),
- ITEM("process/pid", misc, "Process id belonging to the main tor process."),
- ITEM("process/uid", misc, "User id running the tor process."),
- ITEM("process/user", misc,
- "Username under which the tor process is running."),
- ITEM("process/descriptor-limit", misc, "File descriptor limit."),
- ITEM("limits/max-mem-in-queues", misc, "Actual limit on memory in queues"),
- PREFIX("desc-annotations/id/", dir, "Router annotations by hexdigest."),
- PREFIX("dir/server/", dir,"Router descriptors as retrieved from a DirPort."),
- PREFIX("dir/status/", dir,
- "v2 networkstatus docs as retrieved from a DirPort."),
- ITEM("dir/status-vote/current/consensus", dir,
- "v3 Networkstatus consensus as retrieved from a DirPort."),
- ITEM("exit-policy/default", policies,
- "The default value appended to the configured exit policy."),
- ITEM("exit-policy/reject-private/default", policies,
- "The default rules appended to the configured exit policy by"
- " ExitPolicyRejectPrivate."),
- ITEM("exit-policy/reject-private/relay", policies,
- "The relay-specific rules appended to the configured exit policy by"
- " ExitPolicyRejectPrivate and/or ExitPolicyRejectLocalInterfaces."),
- ITEM("exit-policy/full", policies, "The entire exit policy of onion router"),
- ITEM("exit-policy/ipv4", policies, "IPv4 parts of exit policy"),
- ITEM("exit-policy/ipv6", policies, "IPv6 parts of exit policy"),
- PREFIX("ip-to-country/", geoip, "Perform a GEOIP lookup"),
- ITEM("onions/current", onions,
- "Onion services owned by the current control connection."),
- ITEM("onions/detached", onions,
- "Onion services detached from the control connection."),
- ITEM("sr/current", sr, "Get current shared random value."),
- ITEM("sr/previous", sr, "Get previous shared random value."),
- { NULL, NULL, NULL, 0 }
-};
-
-/** Allocate and return a list of recognized GETINFO options. */
-static char *
-list_getinfo_options(void)
-{
- int i;
- smartlist_t *lines = smartlist_new();
- char *ans;
- for (i = 0; getinfo_items[i].varname; ++i) {
- if (!getinfo_items[i].desc)
- continue;
-
- smartlist_add_asprintf(lines, "%s%s -- %s\n",
- getinfo_items[i].varname,
- getinfo_items[i].is_prefix ? "*" : "",
- getinfo_items[i].desc);
- }
- smartlist_sort_strings(lines);
-
- ans = smartlist_join_strings(lines, "", 0, NULL);
- SMARTLIST_FOREACH(lines, char *, cp, tor_free(cp));
- smartlist_free(lines);
-
- return ans;
-}
-
-/** Lookup the 'getinfo' entry <b>question</b>, and return
- * the answer in <b>*answer</b> (or NULL if key not recognized).
- * Return 0 if success or unrecognized, or -1 if recognized but
- * internal error. */
-static int
-handle_getinfo_helper(control_connection_t *control_conn,
- const char *question, char **answer,
- const char **err_out)
-{
- int i;
- *answer = NULL; /* unrecognized key by default */
-
- for (i = 0; getinfo_items[i].varname; ++i) {
- int match;
- if (getinfo_items[i].is_prefix)
- match = !strcmpstart(question, getinfo_items[i].varname);
- else
- match = !strcmp(question, getinfo_items[i].varname);
- if (match) {
- tor_assert(getinfo_items[i].fn);
- return getinfo_items[i].fn(control_conn, question, answer, err_out);
- }
- }
-
- return 0; /* unrecognized */
-}
-
-/** Called when we receive a GETINFO command. Try to fetch all requested
- * information, and reply with information or error message. */
-static int
-handle_control_getinfo(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- smartlist_t *questions = smartlist_new();
- smartlist_t *answers = smartlist_new();
- smartlist_t *unrecognized = smartlist_new();
- char *ans = NULL;
- int i;
- (void) len; /* body is NUL-terminated, so it's safe to ignore the length. */
-
- smartlist_split_string(questions, body, " ",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
- SMARTLIST_FOREACH_BEGIN(questions, const char *, q) {
- const char *errmsg = NULL;
-
- if (handle_getinfo_helper(conn, q, &ans, &errmsg) < 0) {
- if (!errmsg)
- errmsg = "Internal error";
- connection_printf_to_buf(conn, "551 %s\r\n", errmsg);
- goto done;
- }
- if (!ans) {
- if (errmsg) /* use provided error message */
- smartlist_add_strdup(unrecognized, errmsg);
- else /* use default error message */
- smartlist_add_asprintf(unrecognized, "Unrecognized key \"%s\"", q);
- } else {
- smartlist_add_strdup(answers, q);
- smartlist_add(answers, ans);
- }
- } SMARTLIST_FOREACH_END(q);
-
- if (smartlist_len(unrecognized)) {
- /* control-spec section 2.3, mid-reply '-' or end of reply ' ' */
- for (i=0; i < smartlist_len(unrecognized)-1; ++i)
- connection_printf_to_buf(conn,
- "552-%s\r\n",
- (char *)smartlist_get(unrecognized, i));
-
- connection_printf_to_buf(conn,
- "552 %s\r\n",
- (char *)smartlist_get(unrecognized, i));
- goto done;
- }
-
- for (i = 0; i < smartlist_len(answers); i += 2) {
- char *k = smartlist_get(answers, i);
- char *v = smartlist_get(answers, i+1);
- if (!strchr(v, '\n') && !strchr(v, '\r')) {
- connection_printf_to_buf(conn, "250-%s=", k);
- connection_write_str_to_buf(v, conn);
- connection_write_str_to_buf("\r\n", conn);
- } else {
- char *esc = NULL;
- size_t esc_len;
- esc_len = write_escaped_data(v, strlen(v), &esc);
- connection_printf_to_buf(conn, "250+%s=\r\n", k);
- connection_buf_add(esc, esc_len, TO_CONN(conn));
- tor_free(esc);
- }
- }
- connection_write_str_to_buf("250 OK\r\n", conn);
-
- done:
- SMARTLIST_FOREACH(answers, char *, cp, tor_free(cp));
- smartlist_free(answers);
- SMARTLIST_FOREACH(questions, char *, cp, tor_free(cp));
- smartlist_free(questions);
- SMARTLIST_FOREACH(unrecognized, char *, cp, tor_free(cp));
- smartlist_free(unrecognized);
-
- return 0;
-}
-
-/** Given a string, convert it to a circuit purpose. */
-static uint8_t
-circuit_purpose_from_string(const char *string)
-{
- if (!strcasecmpstart(string, "purpose="))
- string += strlen("purpose=");
-
- if (!strcasecmp(string, "general"))
- return CIRCUIT_PURPOSE_C_GENERAL;
- else if (!strcasecmp(string, "controller"))
- return CIRCUIT_PURPOSE_CONTROLLER;
- else
- return CIRCUIT_PURPOSE_UNKNOWN;
-}
-
-/** Return a newly allocated smartlist containing the arguments to the command
- * waiting in <b>body</b>. If there are fewer than <b>min_args</b> arguments,
- * or if <b>max_args</b> is nonnegative and there are more than
- * <b>max_args</b> arguments, send a 512 error to the controller, using
- * <b>command</b> as the command name in the error message. */
-static smartlist_t *
-getargs_helper(const char *command, control_connection_t *conn,
- const char *body, int min_args, int max_args)
-{
- smartlist_t *args = smartlist_new();
- smartlist_split_string(args, body, " ",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
- if (smartlist_len(args) < min_args) {
- connection_printf_to_buf(conn, "512 Missing argument to %s\r\n",command);
- goto err;
- } else if (max_args >= 0 && smartlist_len(args) > max_args) {
- connection_printf_to_buf(conn, "512 Too many arguments to %s\r\n",command);
- goto err;
- }
- return args;
- err:
- SMARTLIST_FOREACH(args, char *, s, tor_free(s));
- smartlist_free(args);
- return NULL;
-}
-
-/** Helper. Return the first element of <b>sl</b> at index <b>start_at</b> or
- * higher that starts with <b>prefix</b>, case-insensitive. Return NULL if no
- * such element exists. */
-static const char *
-find_element_starting_with(smartlist_t *sl, int start_at, const char *prefix)
-{
- int i;
- for (i = start_at; i < smartlist_len(sl); ++i) {
- const char *elt = smartlist_get(sl, i);
- if (!strcasecmpstart(elt, prefix))
- return elt;
- }
- return NULL;
-}
-
-/** Helper. Return true iff s is an argument that we should treat as a
- * key-value pair. */
-static int
-is_keyval_pair(const char *s)
-{
- /* An argument is a key-value pair if it has an =, and it isn't of the form
- * $fingeprint=name */
- return strchr(s, '=') && s[0] != '$';
-}
-
-/** Called when we get an EXTENDCIRCUIT message. Try to extend the listed
- * circuit, and report success or failure. */
-static int
-handle_control_extendcircuit(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- smartlist_t *router_nicknames=NULL, *nodes=NULL;
- origin_circuit_t *circ = NULL;
- int zero_circ;
- uint8_t intended_purpose = CIRCUIT_PURPOSE_C_GENERAL;
- smartlist_t *args;
- (void) len;
-
- router_nicknames = smartlist_new();
-
- args = getargs_helper("EXTENDCIRCUIT", conn, body, 1, -1);
- if (!args)
- goto done;
-
- zero_circ = !strcmp("0", (char*)smartlist_get(args,0));
-
- if (zero_circ) {
- const char *purp = find_element_starting_with(args, 1, "PURPOSE=");
-
- if (purp) {
- intended_purpose = circuit_purpose_from_string(purp);
- if (intended_purpose == CIRCUIT_PURPOSE_UNKNOWN) {
- connection_printf_to_buf(conn, "552 Unknown purpose \"%s\"\r\n", purp);
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- goto done;
- }
- }
-
- if ((smartlist_len(args) == 1) ||
- (smartlist_len(args) >= 2 && is_keyval_pair(smartlist_get(args, 1)))) {
- // "EXTENDCIRCUIT 0" || EXTENDCIRCUIT 0 foo=bar"
- circ = circuit_launch(intended_purpose, CIRCLAUNCH_NEED_CAPACITY);
- if (!circ) {
- connection_write_str_to_buf("551 Couldn't start circuit\r\n", conn);
- } else {
- connection_printf_to_buf(conn, "250 EXTENDED %lu\r\n",
- (unsigned long)circ->global_identifier);
- }
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- goto done;
- }
- // "EXTENDCIRCUIT 0 router1,router2" ||
- // "EXTENDCIRCUIT 0 router1,router2 PURPOSE=foo"
- }
-
- if (!zero_circ && !(circ = get_circ(smartlist_get(args,0)))) {
- connection_printf_to_buf(conn, "552 Unknown circuit \"%s\"\r\n",
- (char*)smartlist_get(args, 0));
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- goto done;
- }
-
- if (smartlist_len(args) < 2) {
- connection_printf_to_buf(conn,
- "512 syntax error: not enough arguments.\r\n");
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- goto done;
- }
-
- smartlist_split_string(router_nicknames, smartlist_get(args,1), ",", 0, 0);
-
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
-
- nodes = smartlist_new();
- int first_node = zero_circ;
- SMARTLIST_FOREACH_BEGIN(router_nicknames, const char *, n) {
- const node_t *node = node_get_by_nickname(n, 0);
- if (!node) {
- connection_printf_to_buf(conn, "552 No such router \"%s\"\r\n", n);
- goto done;
- }
- if (!node_has_preferred_descriptor(node, first_node)) {
- connection_printf_to_buf(conn, "552 No descriptor for \"%s\"\r\n", n);
- goto done;
- }
- smartlist_add(nodes, (void*)node);
- first_node = 0;
- } SMARTLIST_FOREACH_END(n);
- if (!smartlist_len(nodes)) {
- connection_write_str_to_buf("512 No router names provided\r\n", conn);
- goto done;
- }
-
- if (zero_circ) {
- /* start a new circuit */
- circ = origin_circuit_init(intended_purpose, 0);
- }
-
- /* now circ refers to something that is ready to be extended */
- first_node = zero_circ;
- SMARTLIST_FOREACH(nodes, const node_t *, node,
- {
- extend_info_t *info = extend_info_from_node(node, first_node);
- if (!info) {
- tor_assert_nonfatal(first_node);
- log_warn(LD_CONTROL,
- "controller tried to connect to a node that lacks a suitable "
- "descriptor, or which doesn't have any "
- "addresses that are allowed by the firewall configuration; "
- "circuit marked for closing.");
- circuit_mark_for_close(TO_CIRCUIT(circ), -END_CIRC_REASON_CONNECTFAILED);
- connection_write_str_to_buf("551 Couldn't start circuit\r\n", conn);
- goto done;
- }
- circuit_append_new_exit(circ, info);
- if (circ->build_state->desired_path_len > 1) {
- circ->build_state->onehop_tunnel = 0;
- }
- extend_info_free(info);
- first_node = 0;
- });
-
- /* now that we've populated the cpath, start extending */
- if (zero_circ) {
- int err_reason = 0;
- if ((err_reason = circuit_handle_first_hop(circ)) < 0) {
- circuit_mark_for_close(TO_CIRCUIT(circ), -err_reason);
- connection_write_str_to_buf("551 Couldn't start circuit\r\n", conn);
- goto done;
- }
- } else {
- if (circ->base_.state == CIRCUIT_STATE_OPEN ||
- circ->base_.state == CIRCUIT_STATE_GUARD_WAIT) {
- int err_reason = 0;
- circuit_set_state(TO_CIRCUIT(circ), CIRCUIT_STATE_BUILDING);
- if ((err_reason = circuit_send_next_onion_skin(circ)) < 0) {
- log_info(LD_CONTROL,
- "send_next_onion_skin failed; circuit marked for closing.");
- circuit_mark_for_close(TO_CIRCUIT(circ), -err_reason);
- connection_write_str_to_buf("551 Couldn't send onion skin\r\n", conn);
- goto done;
- }
- }
- }
-
- connection_printf_to_buf(conn, "250 EXTENDED %lu\r\n",
- (unsigned long)circ->global_identifier);
- if (zero_circ) /* send a 'launched' event, for completeness */
- control_event_circuit_status(circ, CIRC_EVENT_LAUNCHED, 0);
- done:
- SMARTLIST_FOREACH(router_nicknames, char *, n, tor_free(n));
- smartlist_free(router_nicknames);
- smartlist_free(nodes);
- return 0;
-}
-
-/** Called when we get a SETCIRCUITPURPOSE message. If we can find the
- * circuit and it's a valid purpose, change it. */
-static int
-handle_control_setcircuitpurpose(control_connection_t *conn,
- uint32_t len, const char *body)
-{
- origin_circuit_t *circ = NULL;
- uint8_t new_purpose;
- smartlist_t *args;
- (void) len; /* body is NUL-terminated, so it's safe to ignore the length. */
-
- args = getargs_helper("SETCIRCUITPURPOSE", conn, body, 2, -1);
- if (!args)
- goto done;
-
- if (!(circ = get_circ(smartlist_get(args,0)))) {
- connection_printf_to_buf(conn, "552 Unknown circuit \"%s\"\r\n",
- (char*)smartlist_get(args, 0));
- goto done;
- }
-
- {
- const char *purp = find_element_starting_with(args,1,"PURPOSE=");
- if (!purp) {
- connection_write_str_to_buf("552 No purpose given\r\n", conn);
- goto done;
- }
- new_purpose = circuit_purpose_from_string(purp);
- if (new_purpose == CIRCUIT_PURPOSE_UNKNOWN) {
- connection_printf_to_buf(conn, "552 Unknown purpose \"%s\"\r\n", purp);
- goto done;
- }
- }
-
- circuit_change_purpose(TO_CIRCUIT(circ), new_purpose);
- connection_write_str_to_buf("250 OK\r\n", conn);
-
- done:
- if (args) {
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- }
- return 0;
-}
-
-/** Called when we get an ATTACHSTREAM message. Try to attach the requested
- * stream, and report success or failure. */
-static int
-handle_control_attachstream(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- entry_connection_t *ap_conn = NULL;
- origin_circuit_t *circ = NULL;
- int zero_circ;
- smartlist_t *args;
- crypt_path_t *cpath=NULL;
- int hop=0, hop_line_ok=1;
- (void) len;
-
- args = getargs_helper("ATTACHSTREAM", conn, body, 2, -1);
- if (!args)
- return 0;
-
- zero_circ = !strcmp("0", (char*)smartlist_get(args,1));
-
- if (!(ap_conn = get_stream(smartlist_get(args, 0)))) {
- connection_printf_to_buf(conn, "552 Unknown stream \"%s\"\r\n",
- (char*)smartlist_get(args, 0));
- } else if (!zero_circ && !(circ = get_circ(smartlist_get(args, 1)))) {
- connection_printf_to_buf(conn, "552 Unknown circuit \"%s\"\r\n",
- (char*)smartlist_get(args, 1));
- } else if (circ) {
- const char *hopstring = find_element_starting_with(args,2,"HOP=");
- if (hopstring) {
- hopstring += strlen("HOP=");
- hop = (int) tor_parse_ulong(hopstring, 10, 0, INT_MAX,
- &hop_line_ok, NULL);
- if (!hop_line_ok) { /* broken hop line */
- connection_printf_to_buf(conn, "552 Bad value hop=%s\r\n", hopstring);
- }
- }
- }
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- if (!ap_conn || (!zero_circ && !circ) || !hop_line_ok)
- return 0;
-
- if (ENTRY_TO_CONN(ap_conn)->state != AP_CONN_STATE_CONTROLLER_WAIT &&
- ENTRY_TO_CONN(ap_conn)->state != AP_CONN_STATE_CONNECT_WAIT &&
- ENTRY_TO_CONN(ap_conn)->state != AP_CONN_STATE_RESOLVE_WAIT) {
- connection_write_str_to_buf(
- "555 Connection is not managed by controller.\r\n",
- conn);
- return 0;
- }
-
- /* Do we need to detach it first? */
- if (ENTRY_TO_CONN(ap_conn)->state != AP_CONN_STATE_CONTROLLER_WAIT) {
- edge_connection_t *edge_conn = ENTRY_TO_EDGE_CONN(ap_conn);
- circuit_t *tmpcirc = circuit_get_by_edge_conn(edge_conn);
- connection_edge_end(edge_conn, END_STREAM_REASON_TIMEOUT);
- /* Un-mark it as ending, since we're going to reuse it. */
- edge_conn->edge_has_sent_end = 0;
- edge_conn->end_reason = 0;
- if (tmpcirc)
- circuit_detach_stream(tmpcirc, edge_conn);
- CONNECTION_AP_EXPECT_NONPENDING(ap_conn);
- TO_CONN(edge_conn)->state = AP_CONN_STATE_CONTROLLER_WAIT;
- }
-
- if (circ && (circ->base_.state != CIRCUIT_STATE_OPEN)) {
- connection_write_str_to_buf(
- "551 Can't attach stream to non-open origin circuit\r\n",
- conn);
- return 0;
- }
- /* Is this a single hop circuit? */
- if (circ && (circuit_get_cpath_len(circ)<2 || hop==1)) {
- connection_write_str_to_buf(
- "551 Can't attach stream to this one-hop circuit.\r\n", conn);
- return 0;
- }
-
- if (circ && hop>0) {
- /* find this hop in the circuit, and set cpath */
- cpath = circuit_get_cpath_hop(circ, hop);
- if (!cpath) {
- connection_printf_to_buf(conn,
- "551 Circuit doesn't have %d hops.\r\n", hop);
- return 0;
- }
- }
- if (connection_ap_handshake_rewrite_and_attach(ap_conn, circ, cpath) < 0) {
- connection_write_str_to_buf("551 Unable to attach stream\r\n", conn);
- return 0;
- }
- send_control_done(conn);
- return 0;
-}
-
-/** Called when we get a POSTDESCRIPTOR message. Try to learn the provided
- * descriptor, and report success or failure. */
-static int
-handle_control_postdescriptor(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- char *desc;
- const char *msg=NULL;
- uint8_t purpose = ROUTER_PURPOSE_GENERAL;
- int cache = 0; /* eventually, we may switch this to 1 */
-
- const char *cp = memchr(body, '\n', len);
-
- if (cp == NULL) {
- connection_printf_to_buf(conn, "251 Empty body\r\n");
- return 0;
- }
- ++cp;
-
- char *cmdline = tor_memdup_nulterm(body, cp-body);
- smartlist_t *args = smartlist_new();
- smartlist_split_string(args, cmdline, " ",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
- SMARTLIST_FOREACH_BEGIN(args, char *, option) {
- if (!strcasecmpstart(option, "purpose=")) {
- option += strlen("purpose=");
- purpose = router_purpose_from_string(option);
- if (purpose == ROUTER_PURPOSE_UNKNOWN) {
- connection_printf_to_buf(conn, "552 Unknown purpose \"%s\"\r\n",
- option);
- goto done;
- }
- } else if (!strcasecmpstart(option, "cache=")) {
- option += strlen("cache=");
- if (!strcasecmp(option, "no"))
- cache = 0;
- else if (!strcasecmp(option, "yes"))
- cache = 1;
- else {
- connection_printf_to_buf(conn, "552 Unknown cache request \"%s\"\r\n",
- option);
- goto done;
- }
- } else { /* unrecognized argument? */
- connection_printf_to_buf(conn,
- "512 Unexpected argument \"%s\" to postdescriptor\r\n", option);
- goto done;
- }
- } SMARTLIST_FOREACH_END(option);
-
- read_escaped_data(cp, len-(cp-body), &desc);
-
- switch (router_load_single_router(desc, purpose, cache, &msg)) {
- case -1:
- if (!msg) msg = "Could not parse descriptor";
- connection_printf_to_buf(conn, "554 %s\r\n", msg);
- break;
- case 0:
- if (!msg) msg = "Descriptor not added";
- connection_printf_to_buf(conn, "251 %s\r\n",msg);
- break;
- case 1:
- send_control_done(conn);
- break;
- }
-
- tor_free(desc);
- done:
- SMARTLIST_FOREACH(args, char *, arg, tor_free(arg));
- smartlist_free(args);
- tor_free(cmdline);
- return 0;
-}
-
-/** Called when we receive a REDIRECTSTERAM command. Try to change the target
- * address of the named AP stream, and report success or failure. */
-static int
-handle_control_redirectstream(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- entry_connection_t *ap_conn = NULL;
- char *new_addr = NULL;
- uint16_t new_port = 0;
- smartlist_t *args;
- (void) len;
-
- args = getargs_helper("REDIRECTSTREAM", conn, body, 2, -1);
- if (!args)
- return 0;
-
- if (!(ap_conn = get_stream(smartlist_get(args, 0)))
- || !ap_conn->socks_request) {
- connection_printf_to_buf(conn, "552 Unknown stream \"%s\"\r\n",
- (char*)smartlist_get(args, 0));
- } else {
- int ok = 1;
- if (smartlist_len(args) > 2) { /* they included a port too */
- new_port = (uint16_t) tor_parse_ulong(smartlist_get(args, 2),
- 10, 1, 65535, &ok, NULL);
- }
- if (!ok) {
- connection_printf_to_buf(conn, "512 Cannot parse port \"%s\"\r\n",
- (char*)smartlist_get(args, 2));
- } else {
- new_addr = tor_strdup(smartlist_get(args, 1));
- }
- }
-
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- if (!new_addr)
- return 0;
-
- strlcpy(ap_conn->socks_request->address, new_addr,
- sizeof(ap_conn->socks_request->address));
- if (new_port)
- ap_conn->socks_request->port = new_port;
- tor_free(new_addr);
- send_control_done(conn);
- return 0;
-}
-
-/** Called when we get a CLOSESTREAM command; try to close the named stream
- * and report success or failure. */
-static int
-handle_control_closestream(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- entry_connection_t *ap_conn=NULL;
- uint8_t reason=0;
- smartlist_t *args;
- int ok;
- (void) len;
-
- args = getargs_helper("CLOSESTREAM", conn, body, 2, -1);
- if (!args)
- return 0;
-
- else if (!(ap_conn = get_stream(smartlist_get(args, 0))))
- connection_printf_to_buf(conn, "552 Unknown stream \"%s\"\r\n",
- (char*)smartlist_get(args, 0));
- else {
- reason = (uint8_t) tor_parse_ulong(smartlist_get(args,1), 10, 0, 255,
- &ok, NULL);
- if (!ok) {
- connection_printf_to_buf(conn, "552 Unrecognized reason \"%s\"\r\n",
- (char*)smartlist_get(args, 1));
- ap_conn = NULL;
- }
- }
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- if (!ap_conn)
- return 0;
-
- connection_mark_unattached_ap(ap_conn, reason);
- send_control_done(conn);
- return 0;
-}
-
-/** Called when we get a CLOSECIRCUIT command; try to close the named circuit
- * and report success or failure. */
-static int
-handle_control_closecircuit(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- origin_circuit_t *circ = NULL;
- int safe = 0;
- smartlist_t *args;
- (void) len;
-
- args = getargs_helper("CLOSECIRCUIT", conn, body, 1, -1);
- if (!args)
- return 0;
-
- if (!(circ=get_circ(smartlist_get(args, 0))))
- connection_printf_to_buf(conn, "552 Unknown circuit \"%s\"\r\n",
- (char*)smartlist_get(args, 0));
- else {
- int i;
- for (i=1; i < smartlist_len(args); ++i) {
- if (!strcasecmp(smartlist_get(args, i), "IfUnused"))
- safe = 1;
- else
- log_info(LD_CONTROL, "Skipping unknown option %s",
- (char*)smartlist_get(args,i));
- }
- }
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- if (!circ)
- return 0;
-
- if (!safe || !circ->p_streams) {
- circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_REQUESTED);
- }
-
- send_control_done(conn);
- return 0;
-}
-
-/** Called when we get a RESOLVE command: start trying to resolve
- * the listed addresses. */
-static int
-handle_control_resolve(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- smartlist_t *args, *failed;
- int is_reverse = 0;
- (void) len; /* body is nul-terminated; it's safe to ignore the length */
-
- if (!(conn->event_mask & (((event_mask_t)1)<<EVENT_ADDRMAP))) {
- log_warn(LD_CONTROL, "Controller asked us to resolve an address, but "
- "isn't listening for ADDRMAP events. It probably won't see "
- "the answer.");
- }
- args = smartlist_new();
- smartlist_split_string(args, body, " ",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
- {
- const char *modearg = find_element_starting_with(args, 0, "mode=");
- if (modearg && !strcasecmp(modearg, "mode=reverse"))
- is_reverse = 1;
- }
- failed = smartlist_new();
- SMARTLIST_FOREACH(args, const char *, arg, {
- if (!is_keyval_pair(arg)) {
- if (dnsserv_launch_request(arg, is_reverse, conn)<0)
- smartlist_add(failed, (char*)arg);
- }
- });
-
- send_control_done(conn);
- SMARTLIST_FOREACH(failed, const char *, arg, {
- control_event_address_mapped(arg, arg, time(NULL),
- "internal", 0);
- });
-
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- smartlist_free(failed);
- return 0;
-}
-
-/** Called when we get a PROTOCOLINFO command: send back a reply. */
-static int
-handle_control_protocolinfo(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- const char *bad_arg = NULL;
- smartlist_t *args;
- (void)len;
-
- conn->have_sent_protocolinfo = 1;
- args = smartlist_new();
- smartlist_split_string(args, body, " ",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
- SMARTLIST_FOREACH(args, const char *, arg, {
- int ok;
- tor_parse_long(arg, 10, 0, LONG_MAX, &ok, NULL);
- if (!ok) {
- bad_arg = arg;
- break;
- }
- });
- if (bad_arg) {
- connection_printf_to_buf(conn, "513 No such version %s\r\n",
- escaped(bad_arg));
- /* Don't tolerate bad arguments when not authenticated. */
- if (!STATE_IS_OPEN(TO_CONN(conn)->state))
- connection_mark_for_close(TO_CONN(conn));
- goto done;
- } else {
- const or_options_t *options = get_options();
- int cookies = options->CookieAuthentication;
- char *cfile = get_controller_cookie_file_name();
- char *abs_cfile;
- char *esc_cfile;
- char *methods;
- abs_cfile = make_path_absolute(cfile);
- esc_cfile = esc_for_log(abs_cfile);
- {
- int passwd = (options->HashedControlPassword != NULL ||
- options->HashedControlSessionPassword != NULL);
- smartlist_t *mlist = smartlist_new();
- if (cookies) {
- smartlist_add(mlist, (char*)"COOKIE");
- smartlist_add(mlist, (char*)"SAFECOOKIE");
- }
- if (passwd)
- smartlist_add(mlist, (char*)"HASHEDPASSWORD");
- if (!cookies && !passwd)
- smartlist_add(mlist, (char*)"NULL");
- methods = smartlist_join_strings(mlist, ",", 0, NULL);
- smartlist_free(mlist);
- }
-
- connection_printf_to_buf(conn,
- "250-PROTOCOLINFO 1\r\n"
- "250-AUTH METHODS=%s%s%s\r\n"
- "250-VERSION Tor=%s\r\n"
- "250 OK\r\n",
- methods,
- cookies?" COOKIEFILE=":"",
- cookies?esc_cfile:"",
- escaped(VERSION));
- tor_free(methods);
- tor_free(cfile);
- tor_free(abs_cfile);
- tor_free(esc_cfile);
- }
- done:
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- return 0;
-}
-
-/** Called when we get an AUTHCHALLENGE command. */
-static int
-handle_control_authchallenge(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- const char *cp = body;
- char *client_nonce;
- size_t client_nonce_len;
- char server_hash[DIGEST256_LEN];
- char server_hash_encoded[HEX_DIGEST256_LEN+1];
- char server_nonce[SAFECOOKIE_SERVER_NONCE_LEN];
- char server_nonce_encoded[(2*SAFECOOKIE_SERVER_NONCE_LEN) + 1];
-
- cp += strspn(cp, " \t\n\r");
- if (!strcasecmpstart(cp, "SAFECOOKIE")) {
- cp += strlen("SAFECOOKIE");
- } else {
- connection_write_str_to_buf("513 AUTHCHALLENGE only supports SAFECOOKIE "
- "authentication\r\n", conn);
- connection_mark_for_close(TO_CONN(conn));
- return -1;
- }
-
- if (!authentication_cookie_is_set) {
- connection_write_str_to_buf("515 Cookie authentication is disabled\r\n",
- conn);
- connection_mark_for_close(TO_CONN(conn));
- return -1;
- }
-
- cp += strspn(cp, " \t\n\r");
- if (*cp == '"') {
- const char *newcp =
- decode_escaped_string(cp, len - (cp - body),
- &client_nonce, &client_nonce_len);
- if (newcp == NULL) {
- connection_write_str_to_buf("513 Invalid quoted client nonce\r\n",
- conn);
- connection_mark_for_close(TO_CONN(conn));
- return -1;
- }
- cp = newcp;
- } else {
- size_t client_nonce_encoded_len = strspn(cp, "0123456789ABCDEFabcdef");
-
- client_nonce_len = client_nonce_encoded_len / 2;
- client_nonce = tor_malloc_zero(client_nonce_len);
-
- if (base16_decode(client_nonce, client_nonce_len,
- cp, client_nonce_encoded_len)
- != (int) client_nonce_len) {
- connection_write_str_to_buf("513 Invalid base16 client nonce\r\n",
- conn);
- connection_mark_for_close(TO_CONN(conn));
- tor_free(client_nonce);
- return -1;
- }
-
- cp += client_nonce_encoded_len;
- }
-
- cp += strspn(cp, " \t\n\r");
- if (*cp != '\0' ||
- cp != body + len) {
- connection_write_str_to_buf("513 Junk at end of AUTHCHALLENGE command\r\n",
- conn);
- connection_mark_for_close(TO_CONN(conn));
- tor_free(client_nonce);
- return -1;
- }
- crypto_rand(server_nonce, SAFECOOKIE_SERVER_NONCE_LEN);
-
- /* Now compute and send the server-to-controller response, and the
- * server's nonce. */
- tor_assert(authentication_cookie != NULL);
-
- {
- size_t tmp_len = (AUTHENTICATION_COOKIE_LEN +
- client_nonce_len +
- SAFECOOKIE_SERVER_NONCE_LEN);
- char *tmp = tor_malloc_zero(tmp_len);
- char *client_hash = tor_malloc_zero(DIGEST256_LEN);
- memcpy(tmp, authentication_cookie, AUTHENTICATION_COOKIE_LEN);
- memcpy(tmp + AUTHENTICATION_COOKIE_LEN, client_nonce, client_nonce_len);
- memcpy(tmp + AUTHENTICATION_COOKIE_LEN + client_nonce_len,
- server_nonce, SAFECOOKIE_SERVER_NONCE_LEN);
-
- crypto_hmac_sha256(server_hash,
- SAFECOOKIE_SERVER_TO_CONTROLLER_CONSTANT,
- strlen(SAFECOOKIE_SERVER_TO_CONTROLLER_CONSTANT),
- tmp,
- tmp_len);
-
- crypto_hmac_sha256(client_hash,
- SAFECOOKIE_CONTROLLER_TO_SERVER_CONSTANT,
- strlen(SAFECOOKIE_CONTROLLER_TO_SERVER_CONSTANT),
- tmp,
- tmp_len);
-
- conn->safecookie_client_hash = client_hash;
-
- tor_free(tmp);
- }
-
- base16_encode(server_hash_encoded, sizeof(server_hash_encoded),
- server_hash, sizeof(server_hash));
- base16_encode(server_nonce_encoded, sizeof(server_nonce_encoded),
- server_nonce, sizeof(server_nonce));
-
- connection_printf_to_buf(conn,
- "250 AUTHCHALLENGE SERVERHASH=%s "
- "SERVERNONCE=%s\r\n",
- server_hash_encoded,
- server_nonce_encoded);
-
- tor_free(client_nonce);
- return 0;
-}
-
-/** Called when we get a USEFEATURE command: parse the feature list, and
- * set up the control_connection's options properly. */
-static int
-handle_control_usefeature(control_connection_t *conn,
- uint32_t len,
- const char *body)
-{
- smartlist_t *args;
- int bad = 0;
- (void) len; /* body is nul-terminated; it's safe to ignore the length */
- args = smartlist_new();
- smartlist_split_string(args, body, " ",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
- SMARTLIST_FOREACH_BEGIN(args, const char *, arg) {
- if (!strcasecmp(arg, "VERBOSE_NAMES"))
- ;
- else if (!strcasecmp(arg, "EXTENDED_EVENTS"))
- ;
- else {
- connection_printf_to_buf(conn, "552 Unrecognized feature \"%s\"\r\n",
- arg);
- bad = 1;
- break;
- }
- } SMARTLIST_FOREACH_END(arg);
-
- if (!bad) {
- send_control_done(conn);
- }
-
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- return 0;
-}
-
-/** Implementation for the DROPGUARDS command. */
-static int
-handle_control_dropguards(control_connection_t *conn,
- uint32_t len,
- const char *body)
-{
- smartlist_t *args;
- (void) len; /* body is nul-terminated; it's safe to ignore the length */
- args = smartlist_new();
- smartlist_split_string(args, body, " ",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
-
- static int have_warned = 0;
- if (! have_warned) {
- log_warn(LD_CONTROL, "DROPGUARDS is dangerous; make sure you understand "
- "the risks before using it. It may be removed in a future "
- "version of Tor.");
- have_warned = 1;
- }
-
- if (smartlist_len(args)) {
- connection_printf_to_buf(conn, "512 Too many arguments to DROPGUARDS\r\n");
- } else {
- remove_all_entry_guards();
- send_control_done(conn);
- }
-
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- return 0;
-}
-
-/** Implementation for the HSFETCH command. */
-static int
-handle_control_hsfetch(control_connection_t *conn, uint32_t len,
- const char *body)
-{
- int i;
- char digest[DIGEST_LEN], *hsaddress = NULL, *arg1 = NULL, *desc_id = NULL;
- smartlist_t *args = NULL, *hsdirs = NULL;
- (void) len; /* body is nul-terminated; it's safe to ignore the length */
- static const char *hsfetch_command = "HSFETCH";
- static const char *v2_str = "v2-";
- const size_t v2_str_len = strlen(v2_str);
- rend_data_t *rend_query = NULL;
-
- /* Make sure we have at least one argument, the HSAddress. */
- args = getargs_helper(hsfetch_command, conn, body, 1, -1);
- if (!args) {
- goto exit;
- }
-
- /* Extract the first argument (either HSAddress or DescID). */
- arg1 = smartlist_get(args, 0);
- /* Test if it's an HS address without the .onion part. */
- if (rend_valid_v2_service_id(arg1)) {
- hsaddress = arg1;
- } else if (strcmpstart(arg1, v2_str) == 0 &&
- rend_valid_descriptor_id(arg1 + v2_str_len) &&
- base32_decode(digest, sizeof(digest), arg1 + v2_str_len,
- REND_DESC_ID_V2_LEN_BASE32) == 0) {
- /* We have a well formed version 2 descriptor ID. Keep the decoded value
- * of the id. */
- desc_id = digest;
- } else {
- connection_printf_to_buf(conn, "513 Invalid argument \"%s\"\r\n",
- arg1);
- goto done;
- }
-
- static const char *opt_server = "SERVER=";
-
- /* Skip first argument because it's the HSAddress or DescID. */
- for (i = 1; i < smartlist_len(args); ++i) {
- const char *arg = smartlist_get(args, i);
- const node_t *node;
-
- if (!strcasecmpstart(arg, opt_server)) {
- const char *server;
-
- server = arg + strlen(opt_server);
- node = node_get_by_hex_id(server, 0);
- if (!node) {
- connection_printf_to_buf(conn, "552 Server \"%s\" not found\r\n",
- server);
- goto done;
- }
- if (!hsdirs) {
- /* Stores routerstatus_t object for each specified server. */
- hsdirs = smartlist_new();
- }
- /* Valid server, add it to our local list. */
- smartlist_add(hsdirs, node->rs);
- } else {
- connection_printf_to_buf(conn, "513 Unexpected argument \"%s\"\r\n",
- arg);
- goto done;
- }
- }
-
- rend_query = rend_data_client_create(hsaddress, desc_id, NULL,
- REND_NO_AUTH);
- if (rend_query == NULL) {
- connection_printf_to_buf(conn, "551 Error creating the HS query\r\n");
- goto done;
- }
-
- /* Using a descriptor ID, we force the user to provide at least one
- * hsdir server using the SERVER= option. */
- if (desc_id && (!hsdirs || !smartlist_len(hsdirs))) {
- connection_printf_to_buf(conn, "512 %s option is required\r\n",
- opt_server);
- goto done;
- }
-
- /* We are about to trigger HSDir fetch so send the OK now because after
- * that 650 event(s) are possible so better to have the 250 OK before them
- * to avoid out of order replies. */
- send_control_done(conn);
-
- /* Trigger the fetch using the built rend query and possibly a list of HS
- * directory to use. This function ignores the client cache thus this will
- * always send a fetch command. */
- rend_client_fetch_v2_desc(rend_query, hsdirs);
-
- done:
- SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
- smartlist_free(args);
- /* Contains data pointer that we don't own thus no cleanup. */
- smartlist_free(hsdirs);
- rend_data_free(rend_query);
- exit:
- return 0;
-}
-
-/** Implementation for the HSPOST command. */
-static int
-handle_control_hspost(control_connection_t *conn,
- uint32_t len,
- const char *body)
-{
- static const char *opt_server = "SERVER=";
- static const char *opt_hsaddress = "HSADDRESS=";
- smartlist_t *hs_dirs = NULL;
- const char *encoded_desc = body;
- size_t encoded_desc_len = len;
- const char *onion_address = NULL;
-
- char *cp = memchr(body, '\n', len);
- if (cp == NULL) {
- connection_printf_to_buf(conn, "251 Empty body\r\n");
- return 0;
- }
- char *argline = tor_strndup(body, cp-body);
-
- smartlist_t *args = smartlist_new();
-
- /* If any SERVER= or HSADDRESS= options were specified, try to parse
- * the options line. */
- if (!strcasecmpstart(argline, opt_server) ||
- !strcasecmpstart(argline, opt_hsaddress)) {
- /* encoded_desc begins after a newline character */
- cp = cp + 1;
- encoded_desc = cp;
- encoded_desc_len = len-(cp-body);
-
- smartlist_split_string(args, argline, " ",
- SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
- SMARTLIST_FOREACH_BEGIN(args, const char *, arg) {
- if (!strcasecmpstart(arg, opt_server)) {
- const char *server = arg + strlen(opt_server);
- const node_t *node = node_get_by_hex_id(server, 0);
-
- if (!node || !node->rs) {
- connection_printf_to_buf(conn, "552 Server \"%s\" not found\r\n",
- server);
- goto done;
- }
- /* Valid server, add it to our local list. */
- if (!hs_dirs)
- hs_dirs = smartlist_new();
- smartlist_add(hs_dirs, node->rs);
- } else if (!strcasecmpstart(arg, opt_hsaddress)) {
- const char *address = arg + strlen(opt_hsaddress);
- if (!hs_address_is_valid(address)) {
- connection_printf_to_buf(conn, "512 Malformed onion address\r\n");
- goto done;
- }
- onion_address = address;
- } else {
- connection_printf_to_buf(conn, "512 Unexpected argument \"%s\"\r\n",
- arg);
- goto done;
- }
- } SMARTLIST_FOREACH_END(arg);
- }
-
- /* Handle the v3 case. */
- if (onion_address) {
- char *desc_str = NULL;
- read_escaped_data(encoded_desc, encoded_desc_len, &desc_str);
- if (hs_control_hspost_command(desc_str, onion_address, hs_dirs) < 0) {
- connection_printf_to_buf(conn, "554 Invalid descriptor\r\n");
- } else {
- send_control_done(conn);
- }
- tor_free(desc_str);
- goto done;
- }
-
- /* From this point on, it is only v2. */
-
- /* Read the dot encoded descriptor, and parse it. */
- rend_encoded_v2_service_descriptor_t *desc =
- tor_malloc_zero(sizeof(rend_encoded_v2_service_descriptor_t));
- read_escaped_data(encoded_desc, encoded_desc_len, &desc->desc_str);
-
- rend_service_descriptor_t *parsed = NULL;
- char *intro_content = NULL;
- size_t intro_size;
- size_t encoded_size;
- const char *next_desc;
- if (!rend_parse_v2_service_descriptor(&parsed, desc->desc_id, &intro_content,
- &intro_size, &encoded_size,
- &next_desc, desc->desc_str, 1)) {
- /* Post the descriptor. */
- char serviceid[REND_SERVICE_ID_LEN_BASE32+1];
- if (!rend_get_service_id(parsed->pk, serviceid)) {
- smartlist_t *descs = smartlist_new();
- smartlist_add(descs, desc);
-
- /* We are about to trigger HS descriptor upload so send the OK now
- * because after that 650 event(s) are possible so better to have the
- * 250 OK before them to avoid out of order replies. */
- send_control_done(conn);
-
- /* Trigger the descriptor upload */
- directory_post_to_hs_dir(parsed, descs, hs_dirs, serviceid, 0);
- smartlist_free(descs);
- }
-
- rend_service_descriptor_free(parsed);
- } else {
- connection_printf_to_buf(conn, "554 Invalid descriptor\r\n");
- }
-
- tor_free(intro_content);
- rend_encoded_v2_service_descriptor_free(desc);
- done:
- tor_free(argline);
- smartlist_free(hs_dirs); /* Contents belong to the rend service code. */
- SMARTLIST_FOREACH(args, char *, arg, tor_free(arg));
- smartlist_free(args);
- return 0;
-}
-
-/* Helper function for ADD_ONION that adds an ephemeral service depending on
- * the given hs_version.
- *
- * The secret key in pk depends on the hs_version. The ownership of the key
- * used in pk is given to the HS subsystem so the caller must stop accessing
- * it after.
- *
- * The port_cfgs is a list of service port. Ownership transferred to service.
- * The max_streams refers to the MaxStreams= key.
- * The max_streams_close_circuit refers to the MaxStreamsCloseCircuit key.
- * The auth_type is the authentication type of the clients in auth_clients.
- * The ownership of that list is transferred to the service.
- *
- * On success (RSAE_OKAY), the address_out points to a newly allocated string
- * containing the onion address without the .onion part. On error, address_out
- * is untouched. */
-static hs_service_add_ephemeral_status_t
-add_onion_helper_add_service(int hs_version,
- add_onion_secret_key_t *pk,
- smartlist_t *port_cfgs, int max_streams,
- int max_streams_close_circuit, int auth_type,
- smartlist_t *auth_clients, char **address_out)
-{
- hs_service_add_ephemeral_status_t ret;
-
- tor_assert(pk);
- tor_assert(port_cfgs);
- tor_assert(address_out);
-
- switch (hs_version) {
- case HS_VERSION_TWO:
- ret = rend_service_add_ephemeral(pk->v2, port_cfgs, max_streams,
- max_streams_close_circuit, auth_type,
- auth_clients, address_out);
- break;
- case HS_VERSION_THREE:
- ret = hs_service_add_ephemeral(pk->v3, port_cfgs, max_streams,
- max_streams_close_circuit, address_out);
- break;
- default:
- tor_assert_unreached();
- }
-
- return ret;
-}
-
-/** Called when we get a ADD_ONION command; parse the body, and set up
- * the new ephemeral Onion Service. */
-static int
-handle_control_add_onion(control_connection_t *conn,
- uint32_t len,
- const char *body)
-{
- smartlist_t *args;
- int arg_len;
- (void) len; /* body is nul-terminated; it's safe to ignore the length */
- args = getargs_helper("ADD_ONION", conn, body, 2, -1);
- if (!args)
- return 0;
- arg_len = smartlist_len(args);
-
- /* Parse all of the arguments that do not involve handling cryptographic
- * material first, since there's no reason to touch that at all if any of
- * the other arguments are malformed.
- */
- smartlist_t *port_cfgs = smartlist_new();
- smartlist_t *auth_clients = NULL;
- smartlist_t *auth_created_clients = NULL;
- int discard_pk = 0;
- int detach = 0;
- int max_streams = 0;
- int max_streams_close_circuit = 0;
- rend_auth_type_t auth_type = REND_NO_AUTH;
- /* Default to adding an anonymous hidden service if no flag is given */
- int non_anonymous = 0;
- for (int i = 1; i < arg_len; i++) {
- static const char *port_prefix = "Port=";
- static const char *flags_prefix = "Flags=";
- static const char *max_s_prefix = "MaxStreams=";
- static const char *auth_prefix = "ClientAuth=";
-
- const char *arg = smartlist_get(args, (int)i);
- if (!strcasecmpstart(arg, port_prefix)) {
- /* "Port=VIRTPORT[,TARGET]". */
- const char *port_str = arg + strlen(port_prefix);
-
- rend_service_port_config_t *cfg =
- rend_service_parse_port_config(port_str, ",", NULL);
- if (!cfg) {
- connection_printf_to_buf(conn, "512 Invalid VIRTPORT/TARGET\r\n");
- goto out;
- }
- smartlist_add(port_cfgs, cfg);
- } else if (!strcasecmpstart(arg, max_s_prefix)) {
- /* "MaxStreams=[0..65535]". */
- const char *max_s_str = arg + strlen(max_s_prefix);
- int ok = 0;
- max_streams = (int)tor_parse_long(max_s_str, 10, 0, 65535, &ok, NULL);
- if (!ok) {
- connection_printf_to_buf(conn, "512 Invalid MaxStreams\r\n");
- goto out;
- }
- } else if (!strcasecmpstart(arg, flags_prefix)) {
- /* "Flags=Flag[,Flag]", where Flag can be:
- * * 'DiscardPK' - If tor generates the keypair, do not include it in
- * the response.
- * * 'Detach' - Do not tie this onion service to any particular control
- * connection.
- * * 'MaxStreamsCloseCircuit' - Close the circuit if MaxStreams is
- * exceeded.
- * * 'BasicAuth' - Client authorization using the 'basic' method.
- * * 'NonAnonymous' - Add a non-anonymous Single Onion Service. If this
- * flag is present, tor must be in non-anonymous
- * hidden service mode. If this flag is absent,
- * tor must be in anonymous hidden service mode.
- */
- static const char *discard_flag = "DiscardPK";
- static const char *detach_flag = "Detach";
- static const char *max_s_close_flag = "MaxStreamsCloseCircuit";
- static const char *basicauth_flag = "BasicAuth";
- static const char *non_anonymous_flag = "NonAnonymous";
-
- smartlist_t *flags = smartlist_new();
- int bad = 0;
-
- smartlist_split_string(flags, arg + strlen(flags_prefix), ",",
- SPLIT_IGNORE_BLANK, 0);
- if (smartlist_len(flags) < 1) {
- connection_printf_to_buf(conn, "512 Invalid 'Flags' argument\r\n");
- bad = 1;
- }
- SMARTLIST_FOREACH_BEGIN(flags, const char *, flag)
- {
- if (!strcasecmp(flag, discard_flag)) {
- discard_pk = 1;
- } else if (!strcasecmp(flag, detach_flag)) {
- detach = 1;
- } else if (!strcasecmp(flag, max_s_close_flag)) {
- max_streams_close_circuit = 1;
- } else if (!strcasecmp(flag, basicauth_flag)) {
- auth_type = REND_BASIC_AUTH;
- } else if (!strcasecmp(flag, non_anonymous_flag)) {
- non_anonymous = 1;
- } else {
- connection_printf_to_buf(conn,
- "512 Invalid 'Flags' argument: %s\r\n",
- escaped(flag));
- bad = 1;
- break;
- }
- } SMARTLIST_FOREACH_END(flag);
- SMARTLIST_FOREACH(flags, char *, cp, tor_free(cp));
- smartlist_free(flags);
- if (bad)
- goto out;
- } else if (!strcasecmpstart(arg, auth_prefix)) {
- char *err_msg = NULL;
- int created = 0;
- rend_authorized_client_t *client =
- add_onion_helper_clientauth(arg + strlen(auth_prefix),
- &created, &err_msg);
- if (!client) {
- if (err_msg) {
- connection_write_str_to_buf(err_msg, conn);
- tor_free(err_msg);
- }
- goto out;
- }
-
- if (auth_clients != NULL) {
- int bad = 0;
- SMARTLIST_FOREACH_BEGIN(auth_clients, rend_authorized_client_t *, ac) {
- if (strcmp(ac->client_name, client->client_name) == 0) {
- bad = 1;
- break;
- }
- } SMARTLIST_FOREACH_END(ac);
- if (bad) {
- connection_printf_to_buf(conn,
- "512 Duplicate name in ClientAuth\r\n");
- rend_authorized_client_free(client);
- goto out;
- }
- } else {
- auth_clients = smartlist_new();
- auth_created_clients = smartlist_new();
- }
- smartlist_add(auth_clients, client);
- if (created) {
- smartlist_add(auth_created_clients, client);
- }
- } else {
- connection_printf_to_buf(conn, "513 Invalid argument\r\n");
- goto out;
- }
- }
- if (smartlist_len(port_cfgs) == 0) {
- connection_printf_to_buf(conn, "512 Missing 'Port' argument\r\n");
- goto out;
- } else if (auth_type == REND_NO_AUTH && auth_clients != NULL) {
- connection_printf_to_buf(conn, "512 No auth type specified\r\n");
- goto out;
- } else if (auth_type != REND_NO_AUTH && auth_clients == NULL) {
- connection_printf_to_buf(conn, "512 No auth clients specified\r\n");
- goto out;
- } else if ((auth_type == REND_BASIC_AUTH &&
- smartlist_len(auth_clients) > 512) ||
- (auth_type == REND_STEALTH_AUTH &&
- smartlist_len(auth_clients) > 16)) {
- connection_printf_to_buf(conn, "512 Too many auth clients\r\n");
- goto out;
- } else if (non_anonymous != rend_service_non_anonymous_mode_enabled(
- get_options())) {
- /* If we failed, and the non-anonymous flag is set, Tor must be in
- * anonymous hidden service mode.
- * The error message changes based on the current Tor config:
- * 512 Tor is in anonymous hidden service mode
- * 512 Tor is in non-anonymous hidden service mode
- * (I've deliberately written them out in full here to aid searchability.)
- */
- connection_printf_to_buf(conn, "512 Tor is in %sanonymous hidden service "
- "mode\r\n",
- non_anonymous ? "" : "non-");
- goto out;
- }
-
- /* Parse the "keytype:keyblob" argument. */
- int hs_version = 0;
- add_onion_secret_key_t pk = { NULL };
- const char *key_new_alg = NULL;
- char *key_new_blob = NULL;
- char *err_msg = NULL;
-
- if (add_onion_helper_keyarg(smartlist_get(args, 0), discard_pk,
- &key_new_alg, &key_new_blob, &pk, &hs_version,
- &err_msg) < 0) {
- if (err_msg) {
- connection_write_str_to_buf(err_msg, conn);
- tor_free(err_msg);
- }
- goto out;
- }
- tor_assert(!err_msg);
-
- /* Hidden service version 3 don't have client authentication support so if
- * ClientAuth was given, send back an error. */
- if (hs_version == HS_VERSION_THREE && auth_clients) {
- connection_printf_to_buf(conn, "513 ClientAuth not supported\r\n");
- goto out;
- }
-
- /* Create the HS, using private key pk, client authentication auth_type,
- * the list of auth_clients, and port config port_cfg.
- * rend_service_add_ephemeral() will take ownership of pk and port_cfg,
- * regardless of success/failure.
- */
- char *service_id = NULL;
- int ret = add_onion_helper_add_service(hs_version, &pk, port_cfgs,
- max_streams,
- max_streams_close_circuit, auth_type,
- auth_clients, &service_id);
- port_cfgs = NULL; /* port_cfgs is now owned by the rendservice code. */
- auth_clients = NULL; /* so is auth_clients */
- switch (ret) {
- case RSAE_OKAY:
- {
- if (detach) {
- if (!detached_onion_services)
- detached_onion_services = smartlist_new();
- smartlist_add(detached_onion_services, service_id);
- } else {
- if (!conn->ephemeral_onion_services)
- conn->ephemeral_onion_services = smartlist_new();
- smartlist_add(conn->ephemeral_onion_services, service_id);
- }
-
- tor_assert(service_id);
- connection_printf_to_buf(conn, "250-ServiceID=%s\r\n", service_id);
- if (key_new_alg) {
- tor_assert(key_new_blob);
- connection_printf_to_buf(conn, "250-PrivateKey=%s:%s\r\n",
- key_new_alg, key_new_blob);
- }
- if (auth_created_clients) {
- SMARTLIST_FOREACH(auth_created_clients, rend_authorized_client_t *, ac, {
- char *encoded = rend_auth_encode_cookie(ac->descriptor_cookie,
- auth_type);
- tor_assert(encoded);
- connection_printf_to_buf(conn, "250-ClientAuth=%s:%s\r\n",
- ac->client_name, encoded);
- memwipe(encoded, 0, strlen(encoded));
- tor_free(encoded);
- });
- }
-
- connection_printf_to_buf(conn, "250 OK\r\n");
- break;
- }
- case RSAE_BADPRIVKEY:
- connection_printf_to_buf(conn, "551 Failed to generate onion address\r\n");
- break;
- case RSAE_ADDREXISTS:
- connection_printf_to_buf(conn, "550 Onion address collision\r\n");
- break;
- case RSAE_BADVIRTPORT:
- connection_printf_to_buf(conn, "512 Invalid VIRTPORT/TARGET\r\n");
- break;
- case RSAE_BADAUTH:
- connection_printf_to_buf(conn, "512 Invalid client authorization\r\n");
- break;
- case RSAE_INTERNAL: FALLTHROUGH;
- default:
- connection_printf_to_buf(conn, "551 Failed to add Onion Service\r\n");
- }
- if (key_new_blob) {
- memwipe(key_new_blob, 0, strlen(key_new_blob));
- tor_free(key_new_blob);
- }
-
- out:
- if (port_cfgs) {
- SMARTLIST_FOREACH(port_cfgs, rend_service_port_config_t*, p,
- rend_service_port_config_free(p));
- smartlist_free(port_cfgs);
- }
-
- if (auth_clients) {
- SMARTLIST_FOREACH(auth_clients, rend_authorized_client_t *, ac,
- rend_authorized_client_free(ac));
- smartlist_free(auth_clients);
- }
- if (auth_created_clients) {
- // Do not free entries; they are the same as auth_clients
- smartlist_free(auth_created_clients);
- }
-
- SMARTLIST_FOREACH(args, char *, cp, {
- memwipe(cp, 0, strlen(cp));
- tor_free(cp);
- });
- smartlist_free(args);
- return 0;
-}
-
-/** Helper function to handle parsing the KeyType:KeyBlob argument to the
- * ADD_ONION command. Return a new crypto_pk_t and if a new key was generated
- * and the private key not discarded, the algorithm and serialized private key,
- * or NULL and an optional control protocol error message on failure. The
- * caller is responsible for freeing the returned key_new_blob and err_msg.
- *
- * Note: The error messages returned are deliberately vague to avoid echoing
- * key material.
- */
-STATIC int
-add_onion_helper_keyarg(const char *arg, int discard_pk,
- const char **key_new_alg_out, char **key_new_blob_out,
- add_onion_secret_key_t *decoded_key, int *hs_version,
- char **err_msg_out)
-{
- smartlist_t *key_args = smartlist_new();
- crypto_pk_t *pk = NULL;
- const char *key_new_alg = NULL;
- char *key_new_blob = NULL;
- char *err_msg = NULL;
- int ret = -1;
-
- smartlist_split_string(key_args, arg, ":", SPLIT_IGNORE_BLANK, 0);
- if (smartlist_len(key_args) != 2) {
- err_msg = tor_strdup("512 Invalid key type/blob\r\n");
- goto err;
- }
-
- /* The format is "KeyType:KeyBlob". */
- static const char *key_type_new = "NEW";
- static const char *key_type_best = "BEST";
- static const char *key_type_rsa1024 = "RSA1024";
- static const char *key_type_ed25519_v3 = "ED25519-V3";
-
- const char *key_type = smartlist_get(key_args, 0);
- const char *key_blob = smartlist_get(key_args, 1);
-
- if (!strcasecmp(key_type_rsa1024, key_type)) {
- /* "RSA:<Base64 Blob>" - Loading a pre-existing RSA1024 key. */
- pk = crypto_pk_base64_decode_private(key_blob, strlen(key_blob));
- if (!pk) {
- err_msg = tor_strdup("512 Failed to decode RSA key\r\n");
- goto err;
- }
- if (crypto_pk_num_bits(pk) != PK_BYTES*8) {
- crypto_pk_free(pk);
- err_msg = tor_strdup("512 Invalid RSA key size\r\n");
- goto err;
- }
- decoded_key->v2 = pk;
- *hs_version = HS_VERSION_TWO;
- } else if (!strcasecmp(key_type_ed25519_v3, key_type)) {
- /* "ED25519-V3:<Base64 Blob>" - Loading a pre-existing ed25519 key. */
- ed25519_secret_key_t *sk = tor_malloc_zero(sizeof(*sk));
- if (base64_decode((char *) sk->seckey, sizeof(sk->seckey), key_blob,
- strlen(key_blob)) != sizeof(sk->seckey)) {
- tor_free(sk);
- err_msg = tor_strdup("512 Failed to decode ED25519-V3 key\r\n");
- goto err;
- }
- decoded_key->v3 = sk;
- *hs_version = HS_VERSION_THREE;
- } else if (!strcasecmp(key_type_new, key_type)) {
- /* "NEW:<Algorithm>" - Generating a new key, blob as algorithm. */
- if (!strcasecmp(key_type_rsa1024, key_blob) ||
- !strcasecmp(key_type_best, key_blob)) {
- /* "RSA1024", RSA 1024 bit, also currently "BEST" by default. */
- pk = crypto_pk_new();
- if (crypto_pk_generate_key(pk)) {
- tor_asprintf(&err_msg, "551 Failed to generate %s key\r\n",
- key_type_rsa1024);
- goto err;
- }
- if (!discard_pk) {
- if (crypto_pk_base64_encode_private(pk, &key_new_blob)) {
- crypto_pk_free(pk);
- tor_asprintf(&err_msg, "551 Failed to encode %s key\r\n",
- key_type_rsa1024);
- goto err;
- }
- key_new_alg = key_type_rsa1024;
- }
- decoded_key->v2 = pk;
- *hs_version = HS_VERSION_TWO;
- } else if (!strcasecmp(key_type_ed25519_v3, key_blob)) {
- ed25519_secret_key_t *sk = tor_malloc_zero(sizeof(*sk));
- if (ed25519_secret_key_generate(sk, 1) < 0) {
- tor_free(sk);
- tor_asprintf(&err_msg, "551 Failed to generate %s key\r\n",
- key_type_ed25519_v3);
- goto err;
- }
- if (!discard_pk) {
- ssize_t len = base64_encode_size(sizeof(sk->seckey), 0) + 1;
- key_new_blob = tor_malloc_zero(len);
- if (base64_encode(key_new_blob, len, (const char *) sk->seckey,
- sizeof(sk->seckey), 0) != (len - 1)) {
- tor_free(sk);
- tor_free(key_new_blob);
- tor_asprintf(&err_msg, "551 Failed to encode %s key\r\n",
- key_type_ed25519_v3);
- goto err;
- }
- key_new_alg = key_type_ed25519_v3;
- }
- decoded_key->v3 = sk;
- *hs_version = HS_VERSION_THREE;
- } else {
- err_msg = tor_strdup("513 Invalid key type\r\n");
- goto err;
- }
- } else {
- err_msg = tor_strdup("513 Invalid key type\r\n");
- goto err;
- }
-
- /* Succeeded in loading or generating a private key. */
- ret = 0;
-
- err:
- SMARTLIST_FOREACH(key_args, char *, cp, {
- memwipe(cp, 0, strlen(cp));
- tor_free(cp);
- });
- smartlist_free(key_args);
-
- if (err_msg_out) {
- *err_msg_out = err_msg;
- } else {
- tor_free(err_msg);
- }
- *key_new_alg_out = key_new_alg;
- *key_new_blob_out = key_new_blob;
-
- return ret;
-}
-
-/** Helper function to handle parsing a ClientAuth argument to the
- * ADD_ONION command. Return a new rend_authorized_client_t, or NULL
- * and an optional control protocol error message on failure. The
- * caller is responsible for freeing the returned auth_client and err_msg.
- *
- * If 'created' is specified, it will be set to 1 when a new cookie has
- * been generated.
- */
-STATIC rend_authorized_client_t *
-add_onion_helper_clientauth(const char *arg, int *created, char **err_msg)
-{
- int ok = 0;
-
- tor_assert(arg);
- tor_assert(created);
- tor_assert(err_msg);
- *err_msg = NULL;
-
- smartlist_t *auth_args = smartlist_new();
- rend_authorized_client_t *client =
- tor_malloc_zero(sizeof(rend_authorized_client_t));
- smartlist_split_string(auth_args, arg, ":", 0, 0);
- if (smartlist_len(auth_args) < 1 || smartlist_len(auth_args) > 2) {
- *err_msg = tor_strdup("512 Invalid ClientAuth syntax\r\n");
- goto err;
- }
- client->client_name = tor_strdup(smartlist_get(auth_args, 0));
- if (smartlist_len(auth_args) == 2) {
- char *decode_err_msg = NULL;
- if (rend_auth_decode_cookie(smartlist_get(auth_args, 1),
- client->descriptor_cookie,
- NULL, &decode_err_msg) < 0) {
- tor_assert(decode_err_msg);
- tor_asprintf(err_msg, "512 %s\r\n", decode_err_msg);
- tor_free(decode_err_msg);
- goto err;
- }
- *created = 0;
- } else {
- crypto_rand((char *) client->descriptor_cookie, REND_DESC_COOKIE_LEN);
- *created = 1;
- }
-
- if (!rend_valid_client_name(client->client_name)) {
- *err_msg = tor_strdup("512 Invalid name in ClientAuth\r\n");
- goto err;
- }
-
- ok = 1;
- err:
- SMARTLIST_FOREACH(auth_args, char *, item, tor_free(item));
- smartlist_free(auth_args);
- if (!ok) {
- rend_authorized_client_free(client);
- client = NULL;
- }
- return client;
-}
-
-/** Called when we get a DEL_ONION command; parse the body, and remove
- * the existing ephemeral Onion Service. */
-static int
-handle_control_del_onion(control_connection_t *conn,
- uint32_t len,
- const char *body)
-{
- int hs_version = 0;
- smartlist_t *args;
- (void) len; /* body is nul-terminated; it's safe to ignore the length */
- args = getargs_helper("DEL_ONION", conn, body, 1, 1);
- if (!args)
- return 0;
-
- const char *service_id = smartlist_get(args, 0);
- if (rend_valid_v2_service_id(service_id)) {
- hs_version = HS_VERSION_TWO;
- } else if (hs_address_is_valid(service_id)) {
- hs_version = HS_VERSION_THREE;
- } else {
- connection_printf_to_buf(conn, "512 Malformed Onion Service id\r\n");
- goto out;
- }
-
- /* Determine if the onion service belongs to this particular control
- * connection, or if it is in the global list of detached services. If it
- * is in neither, either the service ID is invalid in some way, or it
- * explicitly belongs to a different control connection, and an error
- * should be returned.
- */
- smartlist_t *services[2] = {
- conn->ephemeral_onion_services,
- detached_onion_services
- };
- smartlist_t *onion_services = NULL;
- int idx = -1;
- for (size_t i = 0; i < ARRAY_LENGTH(services); i++) {
- idx = smartlist_string_pos(services[i], service_id);
- if (idx != -1) {
- onion_services = services[i];
- break;
- }
- }
- if (onion_services == NULL) {
- connection_printf_to_buf(conn, "552 Unknown Onion Service id\r\n");
- } else {
- int ret = -1;
- switch (hs_version) {
- case HS_VERSION_TWO:
- ret = rend_service_del_ephemeral(service_id);
- break;
- case HS_VERSION_THREE:
- ret = hs_service_del_ephemeral(service_id);
- break;
- default:
- /* The ret value will be -1 thus hitting the warning below. This should
- * never happen because of the check at the start of the function. */
- break;
- }
- if (ret < 0) {
- /* This should *NEVER* fail, since the service is on either the
- * per-control connection list, or the global one.
- */
- log_warn(LD_BUG, "Failed to remove Onion Service %s.",
- escaped(service_id));
- tor_fragile_assert();
- }
-
- /* Remove/scrub the service_id from the appropriate list. */
- char *cp = smartlist_get(onion_services, idx);
- smartlist_del(onion_services, idx);
- memwipe(cp, 0, strlen(cp));
- tor_free(cp);
-
- send_control_done(conn);
- }
-
- out:
- SMARTLIST_FOREACH(args, char *, cp, {
- memwipe(cp, 0, strlen(cp));
- tor_free(cp);
- });
- smartlist_free(args);
- return 0;
-}
-
/** Called when <b>conn</b> has no more bytes left on its outbuf. */
int
connection_control_finished_flushing(control_connection_t *conn)
@@ -5349,6 +279,44 @@ peek_connection_has_http_command(connection_t *conn)
return peek_buf_has_http_command(conn->inbuf);
}
+/**
+ * Helper: take a nul-terminated command of given length, and find where the
+ * command starts and the arguments begin. Separate them, allocate a new
+ * string in <b>current_cmd_out</b> for the command, and return a pointer
+ * to the arguments.
+ **/
+STATIC char *
+control_split_incoming_command(char *incoming_cmd,
+ size_t *data_len,
+ char **current_cmd_out)
+{
+ const bool is_multiline = *data_len && incoming_cmd[0] == '+';
+ size_t cmd_len = 0;
+ while (cmd_len < *data_len
+ && !TOR_ISSPACE(incoming_cmd[cmd_len]))
+ ++cmd_len;
+
+ *current_cmd_out = tor_memdup_nulterm(incoming_cmd, cmd_len);
+ char *args = incoming_cmd+cmd_len;
+ tor_assert(*data_len>=cmd_len);
+ *data_len -= cmd_len;
+ if (is_multiline) {
+ // Only match horizontal space: any line after the first is data,
+ // not arguments.
+ while ((*args == '\t' || *args == ' ') && *data_len) {
+ ++args;
+ --*data_len;
+ }
+ } else {
+ while (TOR_ISSPACE(*args) && *data_len) {
+ ++args;
+ --*data_len;
+ }
+ }
+
+ return args;
+}
+
static const char CONTROLPORT_IS_NOT_AN_HTTP_PROXY_MSG[] =
"HTTP/1.0 501 Tor ControlPort is not an HTTP proxy"
"\r\nContent-Type: text/html; charset=iso-8859-1\r\n\r\n"
@@ -5375,6 +343,60 @@ static const char CONTROLPORT_IS_NOT_AN_HTTP_PROXY_MSG[] =
"</body>\n"
"</html>\n";
+/** Return an error on a control connection that tried to use the v0 protocol.
+ */
+static void
+control_send_v0_reject(control_connection_t *conn)
+{
+ size_t body_len;
+ char buf[128];
+ set_uint16(buf+2, htons(0x0000)); /* type == error */
+ set_uint16(buf+4, htons(0x0001)); /* code == internal error */
+ strlcpy(buf+6, "The v0 control protocol is not supported by Tor 0.1.2.17 "
+ "and later; upgrade your controller.",
+ sizeof(buf)-6);
+ body_len = 2+strlen(buf+6)+2; /* code, msg, nul. */
+ set_uint16(buf+0, htons(body_len));
+ connection_buf_add(buf, 4+body_len, TO_CONN(conn));
+
+ connection_mark_and_flush(TO_CONN(conn));
+}
+
+/** Return an error on a control connection that tried to use HTTP.
+ */
+static void
+control_send_http_reject(control_connection_t *conn)
+{
+ connection_write_str_to_buf(CONTROLPORT_IS_NOT_AN_HTTP_PROXY_MSG, conn);
+ log_notice(LD_CONTROL, "Received HTTP request on ControlPort");
+ connection_mark_and_flush(TO_CONN(conn));
+}
+
+/** Check if a control connection has tried to use a known invalid protocol.
+ * If it has, then:
+ * - send a reject response,
+ * - log a notice-level message, and
+ * - return false. */
+static bool
+control_protocol_is_valid(control_connection_t *conn)
+{
+ /* Detect v0 commands and send a "no more v0" message. */
+ if (conn->base_.state == CONTROL_CONN_STATE_NEEDAUTH &&
+ peek_connection_has_control0_command(TO_CONN(conn))) {
+ control_send_v0_reject(conn);
+ return 0;
+ }
+
+ /* If the user has the HTTP proxy port and the control port confused. */
+ if (conn->base_.state == CONTROL_CONN_STATE_NEEDAUTH &&
+ peek_connection_has_http_command(TO_CONN(conn))) {
+ control_send_http_reject(conn);
+ return 0;
+ }
+
+ return 1;
+}
+
/** Called when data has arrived on a v1 control connection: Try to fetch
* commands from conn->inbuf, and execute them.
*/
@@ -5383,7 +405,6 @@ connection_control_process_inbuf(control_connection_t *conn)
{
size_t data_len;
uint32_t cmd_data_len;
- int cmd_len;
char *args;
tor_assert(conn);
@@ -5396,30 +417,7 @@ connection_control_process_inbuf(control_connection_t *conn)
conn->incoming_cmd_cur_len = 0;
}
- if (conn->base_.state == CONTROL_CONN_STATE_NEEDAUTH &&
- peek_connection_has_control0_command(TO_CONN(conn))) {
- /* Detect v0 commands and send a "no more v0" message. */
- size_t body_len;
- char buf[128];
- set_uint16(buf+2, htons(0x0000)); /* type == error */
- set_uint16(buf+4, htons(0x0001)); /* code == internal error */
- strlcpy(buf+6, "The v0 control protocol is not supported by Tor 0.1.2.17 "
- "and later; upgrade your controller.",
- sizeof(buf)-6);
- body_len = 2+strlen(buf+6)+2; /* code, msg, nul. */
- set_uint16(buf+0, htons(body_len));
- connection_buf_add(buf, 4+body_len, TO_CONN(conn));
-
- connection_mark_and_flush(TO_CONN(conn));
- return 0;
- }
-
- /* If the user has the HTTP proxy port and the control port confused. */
- if (conn->base_.state == CONTROL_CONN_STATE_NEEDAUTH &&
- peek_connection_has_http_command(TO_CONN(conn))) {
- connection_write_str_to_buf(CONTROLPORT_IS_NOT_AN_HTTP_PROXY_MSG, conn);
- log_notice(LD_CONTROL, "Received HTTP request on ControlPort");
- connection_mark_and_flush(TO_CONN(conn));
+ if (!control_protocol_is_valid(conn)) {
return 0;
}
@@ -5438,7 +436,7 @@ connection_control_process_inbuf(control_connection_t *conn)
return 0;
else if (r == -1) {
if (data_len + conn->incoming_cmd_cur_len > MAX_COMMAND_LINE_LENGTH) {
- connection_write_str_to_buf("500 Line too long.\r\n", conn);
+ control_write_endreply(conn, 500, "Line too long.");
connection_stop_reading(TO_CONN(conn));
connection_mark_and_flush(TO_CONN(conn));
}
@@ -5475,22 +473,15 @@ connection_control_process_inbuf(control_connection_t *conn)
/* Otherwise, read another line. */
}
data_len = conn->incoming_cmd_cur_len;
+
/* Okay, we now have a command sitting on conn->incoming_cmd. See if we
* recognize it.
*/
- cmd_len = 0;
- while ((size_t)cmd_len < data_len
- && !TOR_ISSPACE(conn->incoming_cmd[cmd_len]))
- ++cmd_len;
-
- conn->incoming_cmd[cmd_len]='\0';
- args = conn->incoming_cmd+cmd_len+1;
- tor_assert(data_len>(size_t)cmd_len);
- data_len -= (cmd_len+1); /* skip the command and NUL we added after it */
- while (TOR_ISSPACE(*args)) {
- ++args;
- --data_len;
- }
+ tor_free(conn->current_cmd);
+ args = control_split_incoming_command(conn->incoming_cmd, &data_len,
+ &conn->current_cmd);
+ if (BUG(!conn->current_cmd))
+ return -1;
/* If the connection is already closing, ignore further commands */
if (TO_CONN(conn)->marked_for_close) {
@@ -5498,1448 +489,50 @@ connection_control_process_inbuf(control_connection_t *conn)
}
/* Otherwise, Quit is always valid. */
- if (!strcasecmp(conn->incoming_cmd, "QUIT")) {
- connection_write_str_to_buf("250 closing connection\r\n", conn);
+ if (!strcasecmp(conn->current_cmd, "QUIT")) {
+ control_write_endreply(conn, 250, "closing connection");
connection_mark_and_flush(TO_CONN(conn));
return 0;
}
if (conn->base_.state == CONTROL_CONN_STATE_NEEDAUTH &&
- !is_valid_initial_command(conn, conn->incoming_cmd)) {
- connection_write_str_to_buf("514 Authentication required.\r\n", conn);
+ !is_valid_initial_command(conn, conn->current_cmd)) {
+ control_write_endreply(conn, 514, "Authentication required.");
connection_mark_for_close(TO_CONN(conn));
return 0;
}
if (data_len >= UINT32_MAX) {
- connection_write_str_to_buf("500 A 4GB command? Nice try.\r\n", conn);
+ control_write_endreply(conn, 500, "A 4GB command? Nice try.");
connection_mark_for_close(TO_CONN(conn));
return 0;
}
- /* XXXX Why is this not implemented as a table like the GETINFO
- * items are? Even handling the plus signs at the beginnings of
- * commands wouldn't be very hard with proper macros. */
cmd_data_len = (uint32_t)data_len;
- if (!strcasecmp(conn->incoming_cmd, "SETCONF")) {
- if (handle_control_setconf(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "RESETCONF")) {
- if (handle_control_resetconf(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "GETCONF")) {
- if (handle_control_getconf(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "+LOADCONF")) {
- if (handle_control_loadconf(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "SETEVENTS")) {
- if (handle_control_setevents(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "AUTHENTICATE")) {
- if (handle_control_authenticate(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "SAVECONF")) {
- if (handle_control_saveconf(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "SIGNAL")) {
- if (handle_control_signal(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "TAKEOWNERSHIP")) {
- if (handle_control_takeownership(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "MAPADDRESS")) {
- if (handle_control_mapaddress(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "GETINFO")) {
- if (handle_control_getinfo(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "EXTENDCIRCUIT")) {
- if (handle_control_extendcircuit(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "SETCIRCUITPURPOSE")) {
- if (handle_control_setcircuitpurpose(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "SETROUTERPURPOSE")) {
- connection_write_str_to_buf("511 SETROUTERPURPOSE is obsolete.\r\n", conn);
- } else if (!strcasecmp(conn->incoming_cmd, "ATTACHSTREAM")) {
- if (handle_control_attachstream(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "+POSTDESCRIPTOR")) {
- if (handle_control_postdescriptor(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "REDIRECTSTREAM")) {
- if (handle_control_redirectstream(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "CLOSESTREAM")) {
- if (handle_control_closestream(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "CLOSECIRCUIT")) {
- if (handle_control_closecircuit(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "USEFEATURE")) {
- if (handle_control_usefeature(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "RESOLVE")) {
- if (handle_control_resolve(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "PROTOCOLINFO")) {
- if (handle_control_protocolinfo(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "AUTHCHALLENGE")) {
- if (handle_control_authchallenge(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "DROPGUARDS")) {
- if (handle_control_dropguards(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "HSFETCH")) {
- if (handle_control_hsfetch(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "+HSPOST")) {
- if (handle_control_hspost(conn, cmd_data_len, args))
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "ADD_ONION")) {
- int ret = handle_control_add_onion(conn, cmd_data_len, args);
- memwipe(args, 0, cmd_data_len); /* Scrub the private key. */
- if (ret)
- return -1;
- } else if (!strcasecmp(conn->incoming_cmd, "DEL_ONION")) {
- int ret = handle_control_del_onion(conn, cmd_data_len, args);
- memwipe(args, 0, cmd_data_len); /* Scrub the service id/pk. */
- if (ret)
- return -1;
- } else {
- connection_printf_to_buf(conn, "510 Unrecognized command \"%s\"\r\n",
- conn->incoming_cmd);
- }
+ if (handle_control_command(conn, cmd_data_len, args) < 0)
+ return -1;
conn->incoming_cmd_cur_len = 0;
goto again;
}
-/** Something major has happened to circuit <b>circ</b>: tell any
- * interested control connections. */
-int
-control_event_circuit_status(origin_circuit_t *circ, circuit_status_event_t tp,
- int reason_code)
-{
- const char *status;
- char reasons[64] = "";
- if (!EVENT_IS_INTERESTING(EVENT_CIRCUIT_STATUS))
- return 0;
- tor_assert(circ);
-
- switch (tp)
- {
- case CIRC_EVENT_LAUNCHED: status = "LAUNCHED"; break;
- case CIRC_EVENT_BUILT: status = "BUILT"; break;
- case CIRC_EVENT_EXTENDED: status = "EXTENDED"; break;
- case CIRC_EVENT_FAILED: status = "FAILED"; break;
- case CIRC_EVENT_CLOSED: status = "CLOSED"; break;
- default:
- log_warn(LD_BUG, "Unrecognized status code %d", (int)tp);
- tor_fragile_assert();
- return 0;
- }
-
- if (tp == CIRC_EVENT_FAILED || tp == CIRC_EVENT_CLOSED) {
- const char *reason_str = circuit_end_reason_to_control_string(reason_code);
- char unk_reason_buf[16];
- if (!reason_str) {
- tor_snprintf(unk_reason_buf, 16, "UNKNOWN_%d", reason_code);
- reason_str = unk_reason_buf;
- }
- if (reason_code > 0 && reason_code & END_CIRC_REASON_FLAG_REMOTE) {
- tor_snprintf(reasons, sizeof(reasons),
- " REASON=DESTROYED REMOTE_REASON=%s", reason_str);
- } else {
- tor_snprintf(reasons, sizeof(reasons),
- " REASON=%s", reason_str);
- }
- }
-
- {
- char *circdesc = circuit_describe_status_for_controller(circ);
- const char *sp = strlen(circdesc) ? " " : "";
- send_control_event(EVENT_CIRCUIT_STATUS,
- "650 CIRC %lu %s%s%s%s\r\n",
- (unsigned long)circ->global_identifier,
- status, sp,
- circdesc,
- reasons);
- tor_free(circdesc);
- }
-
- return 0;
-}
-
-/** Something minor has happened to circuit <b>circ</b>: tell any
- * interested control connections. */
-static int
-control_event_circuit_status_minor(origin_circuit_t *circ,
- circuit_status_minor_event_t e,
- int purpose, const struct timeval *tv)
-{
- const char *event_desc;
- char event_tail[160] = "";
- if (!EVENT_IS_INTERESTING(EVENT_CIRCUIT_STATUS_MINOR))
- return 0;
- tor_assert(circ);
-
- switch (e)
- {
- case CIRC_MINOR_EVENT_PURPOSE_CHANGED:
- event_desc = "PURPOSE_CHANGED";
-
- {
- /* event_tail can currently be up to 68 chars long */
- const char *hs_state_str =
- circuit_purpose_to_controller_hs_state_string(purpose);
- tor_snprintf(event_tail, sizeof(event_tail),
- " OLD_PURPOSE=%s%s%s",
- circuit_purpose_to_controller_string(purpose),
- (hs_state_str != NULL) ? " OLD_HS_STATE=" : "",
- (hs_state_str != NULL) ? hs_state_str : "");
- }
-
- break;
- case CIRC_MINOR_EVENT_CANNIBALIZED:
- event_desc = "CANNIBALIZED";
-
- {
- /* event_tail can currently be up to 130 chars long */
- const char *hs_state_str =
- circuit_purpose_to_controller_hs_state_string(purpose);
- const struct timeval *old_timestamp_began = tv;
- char tbuf[ISO_TIME_USEC_LEN+1];
- format_iso_time_nospace_usec(tbuf, old_timestamp_began);
-
- tor_snprintf(event_tail, sizeof(event_tail),
- " OLD_PURPOSE=%s%s%s OLD_TIME_CREATED=%s",
- circuit_purpose_to_controller_string(purpose),
- (hs_state_str != NULL) ? " OLD_HS_STATE=" : "",
- (hs_state_str != NULL) ? hs_state_str : "",
- tbuf);
- }
-
- break;
- default:
- log_warn(LD_BUG, "Unrecognized status code %d", (int)e);
- tor_fragile_assert();
- return 0;
- }
-
- {
- char *circdesc = circuit_describe_status_for_controller(circ);
- const char *sp = strlen(circdesc) ? " " : "";
- send_control_event(EVENT_CIRCUIT_STATUS_MINOR,
- "650 CIRC_MINOR %lu %s%s%s%s\r\n",
- (unsigned long)circ->global_identifier,
- event_desc, sp,
- circdesc,
- event_tail);
- tor_free(circdesc);
- }
-
- return 0;
-}
-
-/**
- * <b>circ</b> has changed its purpose from <b>old_purpose</b>: tell any
- * interested controllers.
- */
-int
-control_event_circuit_purpose_changed(origin_circuit_t *circ,
- int old_purpose)
-{
- return control_event_circuit_status_minor(circ,
- CIRC_MINOR_EVENT_PURPOSE_CHANGED,
- old_purpose,
- NULL);
-}
-
-/**
- * <b>circ</b> has changed its purpose from <b>old_purpose</b>, and its
- * created-time from <b>old_tv_created</b>: tell any interested controllers.
- */
-int
-control_event_circuit_cannibalized(origin_circuit_t *circ,
- int old_purpose,
- const struct timeval *old_tv_created)
-{
- return control_event_circuit_status_minor(circ,
- CIRC_MINOR_EVENT_CANNIBALIZED,
- old_purpose,
- old_tv_created);
-}
-
-/** Given an AP connection <b>conn</b> and a <b>len</b>-character buffer
- * <b>buf</b>, determine the address:port combination requested on
- * <b>conn</b>, and write it to <b>buf</b>. Return 0 on success, -1 on
- * failure. */
-static int
-write_stream_target_to_buf(entry_connection_t *conn, char *buf, size_t len)
-{
- char buf2[256];
- if (conn->chosen_exit_name)
- if (tor_snprintf(buf2, sizeof(buf2), ".%s.exit", conn->chosen_exit_name)<0)
- return -1;
- if (!conn->socks_request)
- return -1;
- if (tor_snprintf(buf, len, "%s%s%s:%d",
- conn->socks_request->address,
- conn->chosen_exit_name ? buf2 : "",
- !conn->chosen_exit_name && connection_edge_is_rendezvous_stream(
- ENTRY_TO_EDGE_CONN(conn)) ? ".onion" : "",
- conn->socks_request->port)<0)
- return -1;
- return 0;
-}
-
-/** Something has happened to the stream associated with AP connection
- * <b>conn</b>: tell any interested control connections. */
-int
-control_event_stream_status(entry_connection_t *conn, stream_status_event_t tp,
- int reason_code)
-{
- char reason_buf[64];
- char addrport_buf[64];
- const char *status;
- circuit_t *circ;
- origin_circuit_t *origin_circ = NULL;
- char buf[256];
- const char *purpose = "";
- tor_assert(conn->socks_request);
-
- if (!EVENT_IS_INTERESTING(EVENT_STREAM_STATUS))
- return 0;
-
- if (tp == STREAM_EVENT_CLOSED &&
- (reason_code & END_STREAM_REASON_FLAG_ALREADY_SENT_CLOSED))
- return 0;
-
- write_stream_target_to_buf(conn, buf, sizeof(buf));
-
- reason_buf[0] = '\0';
- switch (tp)
- {
- case STREAM_EVENT_SENT_CONNECT: status = "SENTCONNECT"; break;
- case STREAM_EVENT_SENT_RESOLVE: status = "SENTRESOLVE"; break;
- case STREAM_EVENT_SUCCEEDED: status = "SUCCEEDED"; break;
- case STREAM_EVENT_FAILED: status = "FAILED"; break;
- case STREAM_EVENT_CLOSED: status = "CLOSED"; break;
- case STREAM_EVENT_NEW: status = "NEW"; break;
- case STREAM_EVENT_NEW_RESOLVE: status = "NEWRESOLVE"; break;
- case STREAM_EVENT_FAILED_RETRIABLE: status = "DETACHED"; break;
- case STREAM_EVENT_REMAP: status = "REMAP"; break;
- default:
- log_warn(LD_BUG, "Unrecognized status code %d", (int)tp);
- return 0;
- }
- if (reason_code && (tp == STREAM_EVENT_FAILED ||
- tp == STREAM_EVENT_CLOSED ||
- tp == STREAM_EVENT_FAILED_RETRIABLE)) {
- const char *reason_str = stream_end_reason_to_control_string(reason_code);
- char *r = NULL;
- if (!reason_str) {
- tor_asprintf(&r, " UNKNOWN_%d", reason_code);
- reason_str = r;
- }
- if (reason_code & END_STREAM_REASON_FLAG_REMOTE)
- tor_snprintf(reason_buf, sizeof(reason_buf),
- " REASON=END REMOTE_REASON=%s", reason_str);
- else
- tor_snprintf(reason_buf, sizeof(reason_buf),
- " REASON=%s", reason_str);
- tor_free(r);
- } else if (reason_code && tp == STREAM_EVENT_REMAP) {
- switch (reason_code) {
- case REMAP_STREAM_SOURCE_CACHE:
- strlcpy(reason_buf, " SOURCE=CACHE", sizeof(reason_buf));
- break;
- case REMAP_STREAM_SOURCE_EXIT:
- strlcpy(reason_buf, " SOURCE=EXIT", sizeof(reason_buf));
- break;
- default:
- tor_snprintf(reason_buf, sizeof(reason_buf), " REASON=UNKNOWN_%d",
- reason_code);
- /* XXX do we want SOURCE=UNKNOWN_%d above instead? -RD */
- break;
- }
- }
-
- if (tp == STREAM_EVENT_NEW || tp == STREAM_EVENT_NEW_RESOLVE) {
- /*
- * When the control conn is an AF_UNIX socket and we have no address,
- * it gets set to "(Tor_internal)"; see dnsserv_launch_request() in
- * dnsserv.c.
- */
- if (strcmp(ENTRY_TO_CONN(conn)->address, "(Tor_internal)") != 0) {
- tor_snprintf(addrport_buf,sizeof(addrport_buf), " SOURCE_ADDR=%s:%d",
- ENTRY_TO_CONN(conn)->address, ENTRY_TO_CONN(conn)->port);
- } else {
- /*
- * else leave it blank so control on AF_UNIX doesn't need to make
- * something up.
- */
- addrport_buf[0] = '\0';
- }
- } else {
- addrport_buf[0] = '\0';
- }
-
- if (tp == STREAM_EVENT_NEW_RESOLVE) {
- purpose = " PURPOSE=DNS_REQUEST";
- } else if (tp == STREAM_EVENT_NEW) {
- if (conn->use_begindir) {
- connection_t *linked = ENTRY_TO_CONN(conn)->linked_conn;
- int linked_dir_purpose = -1;
- if (linked && linked->type == CONN_TYPE_DIR)
- linked_dir_purpose = linked->purpose;
- if (DIR_PURPOSE_IS_UPLOAD(linked_dir_purpose))
- purpose = " PURPOSE=DIR_UPLOAD";
- else
- purpose = " PURPOSE=DIR_FETCH";
- } else
- purpose = " PURPOSE=USER";
- }
-
- circ = circuit_get_by_edge_conn(ENTRY_TO_EDGE_CONN(conn));
- if (circ && CIRCUIT_IS_ORIGIN(circ))
- origin_circ = TO_ORIGIN_CIRCUIT(circ);
- send_control_event(EVENT_STREAM_STATUS,
- "650 STREAM %"PRIu64" %s %lu %s%s%s%s\r\n",
- (ENTRY_TO_CONN(conn)->global_identifier),
- status,
- origin_circ?
- (unsigned long)origin_circ->global_identifier : 0ul,
- buf, reason_buf, addrport_buf, purpose);
-
- /* XXX need to specify its intended exit, etc? */
-
- return 0;
-}
-
-/** Figure out the best name for the target router of an OR connection
- * <b>conn</b>, and write it into the <b>len</b>-character buffer
- * <b>name</b>. */
-static void
-orconn_target_get_name(char *name, size_t len, or_connection_t *conn)
-{
- const node_t *node = node_get_by_id(conn->identity_digest);
- if (node) {
- tor_assert(len > MAX_VERBOSE_NICKNAME_LEN);
- node_get_verbose_nickname(node, name);
- } else if (! tor_digest_is_zero(conn->identity_digest)) {
- name[0] = '$';
- base16_encode(name+1, len-1, conn->identity_digest,
- DIGEST_LEN);
- } else {
- tor_snprintf(name, len, "%s:%d",
- conn->base_.address, conn->base_.port);
- }
-}
-
-/** Called when the status of an OR connection <b>conn</b> changes: tell any
- * interested control connections. <b>tp</b> is the new status for the
- * connection. If <b>conn</b> has just closed or failed, then <b>reason</b>
- * may be the reason why.
- */
-int
-control_event_or_conn_status(or_connection_t *conn, or_conn_status_event_t tp,
- int reason)
-{
- int ncircs = 0;
- const char *status;
- char name[128];
- char ncircs_buf[32] = {0}; /* > 8 + log10(2^32)=10 + 2 */
-
- if (!EVENT_IS_INTERESTING(EVENT_OR_CONN_STATUS))
- return 0;
-
- switch (tp)
- {
- case OR_CONN_EVENT_LAUNCHED: status = "LAUNCHED"; break;
- case OR_CONN_EVENT_CONNECTED: status = "CONNECTED"; break;
- case OR_CONN_EVENT_FAILED: status = "FAILED"; break;
- case OR_CONN_EVENT_CLOSED: status = "CLOSED"; break;
- case OR_CONN_EVENT_NEW: status = "NEW"; break;
- default:
- log_warn(LD_BUG, "Unrecognized status code %d", (int)tp);
- return 0;
- }
- if (conn->chan) {
- ncircs = circuit_count_pending_on_channel(TLS_CHAN_TO_BASE(conn->chan));
- } else {
- ncircs = 0;
- }
- ncircs += connection_or_get_num_circuits(conn);
- if (ncircs && (tp == OR_CONN_EVENT_FAILED || tp == OR_CONN_EVENT_CLOSED)) {
- tor_snprintf(ncircs_buf, sizeof(ncircs_buf), " NCIRCS=%d", ncircs);
- }
-
- orconn_target_get_name(name, sizeof(name), conn);
- send_control_event(EVENT_OR_CONN_STATUS,
- "650 ORCONN %s %s%s%s%s ID=%"PRIu64"\r\n",
- name, status,
- reason ? " REASON=" : "",
- orconn_end_reason_to_control_string(reason),
- ncircs_buf,
- (conn->base_.global_identifier));
-
- return 0;
-}
-
-/**
- * Print out STREAM_BW event for a single conn
- */
-int
-control_event_stream_bandwidth(edge_connection_t *edge_conn)
-{
- struct timeval now;
- char tbuf[ISO_TIME_USEC_LEN+1];
- if (EVENT_IS_INTERESTING(EVENT_STREAM_BANDWIDTH_USED)) {
- if (!edge_conn->n_read && !edge_conn->n_written)
- return 0;
-
- tor_gettimeofday(&now);
- format_iso_time_nospace_usec(tbuf, &now);
- send_control_event(EVENT_STREAM_BANDWIDTH_USED,
- "650 STREAM_BW %"PRIu64" %lu %lu %s\r\n",
- (edge_conn->base_.global_identifier),
- (unsigned long)edge_conn->n_read,
- (unsigned long)edge_conn->n_written,
- tbuf);
-
- edge_conn->n_written = edge_conn->n_read = 0;
- }
-
- return 0;
-}
-
-/** A second or more has elapsed: tell any interested control
- * connections how much bandwidth streams have used. */
-int
-control_event_stream_bandwidth_used(void)
-{
- if (EVENT_IS_INTERESTING(EVENT_STREAM_BANDWIDTH_USED)) {
- smartlist_t *conns = get_connection_array();
- edge_connection_t *edge_conn;
- struct timeval now;
- char tbuf[ISO_TIME_USEC_LEN+1];
-
- SMARTLIST_FOREACH_BEGIN(conns, connection_t *, conn)
- {
- if (conn->type != CONN_TYPE_AP)
- continue;
- edge_conn = TO_EDGE_CONN(conn);
- if (!edge_conn->n_read && !edge_conn->n_written)
- continue;
-
- tor_gettimeofday(&now);
- format_iso_time_nospace_usec(tbuf, &now);
- send_control_event(EVENT_STREAM_BANDWIDTH_USED,
- "650 STREAM_BW %"PRIu64" %lu %lu %s\r\n",
- (edge_conn->base_.global_identifier),
- (unsigned long)edge_conn->n_read,
- (unsigned long)edge_conn->n_written,
- tbuf);
-
- edge_conn->n_written = edge_conn->n_read = 0;
- }
- SMARTLIST_FOREACH_END(conn);
- }
-
- return 0;
-}
-
-/** A second or more has elapsed: tell any interested control connections
- * how much bandwidth origin circuits have used. */
-int
-control_event_circ_bandwidth_used(void)
-{
- if (!EVENT_IS_INTERESTING(EVENT_CIRC_BANDWIDTH_USED))
- return 0;
-
- SMARTLIST_FOREACH_BEGIN(circuit_get_global_list(), circuit_t *, circ) {
- if (!CIRCUIT_IS_ORIGIN(circ))
- continue;
-
- control_event_circ_bandwidth_used_for_circ(TO_ORIGIN_CIRCUIT(circ));
- }
- SMARTLIST_FOREACH_END(circ);
-
- return 0;
-}
-
-/**
- * Emit a CIRC_BW event line for a specific circuit.
- *
- * This function sets the values it emits to 0, and does not emit
- * an event if there is no new data to report since the last call.
- *
- * Therefore, it may be called at any frequency.
- */
-int
-control_event_circ_bandwidth_used_for_circ(origin_circuit_t *ocirc)
-{
- struct timeval now;
- char tbuf[ISO_TIME_USEC_LEN+1];
-
- tor_assert(ocirc);
-
- if (!EVENT_IS_INTERESTING(EVENT_CIRC_BANDWIDTH_USED))
- return 0;
-
- /* n_read_circ_bw and n_written_circ_bw are always updated
- * when there is any new cell on a circuit, and set to 0 after
- * the event, below.
- *
- * Therefore, checking them is sufficient to determine if there
- * is new data to report. */
- if (!ocirc->n_read_circ_bw && !ocirc->n_written_circ_bw)
- return 0;
-
- tor_gettimeofday(&now);
- format_iso_time_nospace_usec(tbuf, &now);
- send_control_event(EVENT_CIRC_BANDWIDTH_USED,
- "650 CIRC_BW ID=%d READ=%lu WRITTEN=%lu TIME=%s "
- "DELIVERED_READ=%lu OVERHEAD_READ=%lu "
- "DELIVERED_WRITTEN=%lu OVERHEAD_WRITTEN=%lu\r\n",
- ocirc->global_identifier,
- (unsigned long)ocirc->n_read_circ_bw,
- (unsigned long)ocirc->n_written_circ_bw,
- tbuf,
- (unsigned long)ocirc->n_delivered_read_circ_bw,
- (unsigned long)ocirc->n_overhead_read_circ_bw,
- (unsigned long)ocirc->n_delivered_written_circ_bw,
- (unsigned long)ocirc->n_overhead_written_circ_bw);
- ocirc->n_written_circ_bw = ocirc->n_read_circ_bw = 0;
- ocirc->n_overhead_written_circ_bw = ocirc->n_overhead_read_circ_bw = 0;
- ocirc->n_delivered_written_circ_bw = ocirc->n_delivered_read_circ_bw = 0;
-
- return 0;
-}
-
-/** Print out CONN_BW event for a single OR/DIR/EXIT <b>conn</b> and reset
- * bandwidth counters. */
-int
-control_event_conn_bandwidth(connection_t *conn)
-{
- const char *conn_type_str;
- if (!get_options()->TestingEnableConnBwEvent ||
- !EVENT_IS_INTERESTING(EVENT_CONN_BW))
- return 0;
- if (!conn->n_read_conn_bw && !conn->n_written_conn_bw)
- return 0;
- switch (conn->type) {
- case CONN_TYPE_OR:
- conn_type_str = "OR";
- break;
- case CONN_TYPE_DIR:
- conn_type_str = "DIR";
- break;
- case CONN_TYPE_EXIT:
- conn_type_str = "EXIT";
- break;
- default:
- return 0;
- }
- send_control_event(EVENT_CONN_BW,
- "650 CONN_BW ID=%"PRIu64" TYPE=%s "
- "READ=%lu WRITTEN=%lu\r\n",
- (conn->global_identifier),
- conn_type_str,
- (unsigned long)conn->n_read_conn_bw,
- (unsigned long)conn->n_written_conn_bw);
- conn->n_written_conn_bw = conn->n_read_conn_bw = 0;
- return 0;
-}
-
-/** A second or more has elapsed: tell any interested control
- * connections how much bandwidth connections have used. */
-int
-control_event_conn_bandwidth_used(void)
-{
- if (get_options()->TestingEnableConnBwEvent &&
- EVENT_IS_INTERESTING(EVENT_CONN_BW)) {
- SMARTLIST_FOREACH(get_connection_array(), connection_t *, conn,
- control_event_conn_bandwidth(conn));
- }
- return 0;
-}
-
-/** Helper: iterate over cell statistics of <b>circ</b> and sum up added
- * cells, removed cells, and waiting times by cell command and direction.
- * Store results in <b>cell_stats</b>. Free cell statistics of the
- * circuit afterwards. */
-void
-sum_up_cell_stats_by_command(circuit_t *circ, cell_stats_t *cell_stats)
-{
- memset(cell_stats, 0, sizeof(cell_stats_t));
- SMARTLIST_FOREACH_BEGIN(circ->testing_cell_stats,
- const testing_cell_stats_entry_t *, ent) {
- tor_assert(ent->command <= CELL_COMMAND_MAX_);
- if (!ent->removed && !ent->exitward) {
- cell_stats->added_cells_appward[ent->command] += 1;
- } else if (!ent->removed && ent->exitward) {
- cell_stats->added_cells_exitward[ent->command] += 1;
- } else if (!ent->exitward) {
- cell_stats->removed_cells_appward[ent->command] += 1;
- cell_stats->total_time_appward[ent->command] += ent->waiting_time * 10;
- } else {
- cell_stats->removed_cells_exitward[ent->command] += 1;
- cell_stats->total_time_exitward[ent->command] += ent->waiting_time * 10;
- }
- } SMARTLIST_FOREACH_END(ent);
- circuit_clear_testing_cell_stats(circ);
-}
-
-/** Helper: append a cell statistics string to <code>event_parts</code>,
- * prefixed with <code>key</code>=. Statistics consist of comma-separated
- * key:value pairs with lower-case command strings as keys and cell
- * numbers or total waiting times as values. A key:value pair is included
- * if the entry in <code>include_if_non_zero</code> is not zero, but with
- * the (possibly zero) entry from <code>number_to_include</code>. Both
- * arrays are expected to have a length of CELL_COMMAND_MAX_ + 1. If no
- * entry in <code>include_if_non_zero</code> is positive, no string will
- * be added to <code>event_parts</code>. */
-void
-append_cell_stats_by_command(smartlist_t *event_parts, const char *key,
- const uint64_t *include_if_non_zero,
- const uint64_t *number_to_include)
-{
- smartlist_t *key_value_strings = smartlist_new();
- int i;
- for (i = 0; i <= CELL_COMMAND_MAX_; i++) {
- if (include_if_non_zero[i] > 0) {
- smartlist_add_asprintf(key_value_strings, "%s:%"PRIu64,
- cell_command_to_string(i),
- (number_to_include[i]));
- }
- }
- if (smartlist_len(key_value_strings) > 0) {
- char *joined = smartlist_join_strings(key_value_strings, ",", 0, NULL);
- smartlist_add_asprintf(event_parts, "%s=%s", key, joined);
- SMARTLIST_FOREACH(key_value_strings, char *, cp, tor_free(cp));
- tor_free(joined);
- }
- smartlist_free(key_value_strings);
-}
-
-/** Helper: format <b>cell_stats</b> for <b>circ</b> for inclusion in a
- * CELL_STATS event and write result string to <b>event_string</b>. */
-void
-format_cell_stats(char **event_string, circuit_t *circ,
- cell_stats_t *cell_stats)
-{
- smartlist_t *event_parts = smartlist_new();
- if (CIRCUIT_IS_ORIGIN(circ)) {
- origin_circuit_t *ocirc = TO_ORIGIN_CIRCUIT(circ);
- smartlist_add_asprintf(event_parts, "ID=%lu",
- (unsigned long)ocirc->global_identifier);
- } else if (TO_OR_CIRCUIT(circ)->p_chan) {
- or_circuit_t *or_circ = TO_OR_CIRCUIT(circ);
- smartlist_add_asprintf(event_parts, "InboundQueue=%lu",
- (unsigned long)or_circ->p_circ_id);
- smartlist_add_asprintf(event_parts, "InboundConn=%"PRIu64,
- (or_circ->p_chan->global_identifier));
- append_cell_stats_by_command(event_parts, "InboundAdded",
- cell_stats->added_cells_appward,
- cell_stats->added_cells_appward);
- append_cell_stats_by_command(event_parts, "InboundRemoved",
- cell_stats->removed_cells_appward,
- cell_stats->removed_cells_appward);
- append_cell_stats_by_command(event_parts, "InboundTime",
- cell_stats->removed_cells_appward,
- cell_stats->total_time_appward);
- }
- if (circ->n_chan) {
- smartlist_add_asprintf(event_parts, "OutboundQueue=%lu",
- (unsigned long)circ->n_circ_id);
- smartlist_add_asprintf(event_parts, "OutboundConn=%"PRIu64,
- (circ->n_chan->global_identifier));
- append_cell_stats_by_command(event_parts, "OutboundAdded",
- cell_stats->added_cells_exitward,
- cell_stats->added_cells_exitward);
- append_cell_stats_by_command(event_parts, "OutboundRemoved",
- cell_stats->removed_cells_exitward,
- cell_stats->removed_cells_exitward);
- append_cell_stats_by_command(event_parts, "OutboundTime",
- cell_stats->removed_cells_exitward,
- cell_stats->total_time_exitward);
- }
- *event_string = smartlist_join_strings(event_parts, " ", 0, NULL);
- SMARTLIST_FOREACH(event_parts, char *, cp, tor_free(cp));
- smartlist_free(event_parts);
-}
-
-/** A second or more has elapsed: tell any interested control connection
- * how many cells have been processed for a given circuit. */
-int
-control_event_circuit_cell_stats(void)
-{
- cell_stats_t *cell_stats;
- char *event_string;
- if (!get_options()->TestingEnableCellStatsEvent ||
- !EVENT_IS_INTERESTING(EVENT_CELL_STATS))
- return 0;
- cell_stats = tor_malloc(sizeof(cell_stats_t));
- SMARTLIST_FOREACH_BEGIN(circuit_get_global_list(), circuit_t *, circ) {
- if (!circ->testing_cell_stats)
- continue;
- sum_up_cell_stats_by_command(circ, cell_stats);
- format_cell_stats(&event_string, circ, cell_stats);
- send_control_event(EVENT_CELL_STATS,
- "650 CELL_STATS %s\r\n", event_string);
- tor_free(event_string);
- }
- SMARTLIST_FOREACH_END(circ);
- tor_free(cell_stats);
- return 0;
-}
-
-/* about 5 minutes worth. */
-#define N_BW_EVENTS_TO_CACHE 300
-/* Index into cached_bw_events to next write. */
-static int next_measurement_idx = 0;
-/* number of entries set in n_measurements */
-static int n_measurements = 0;
-static struct cached_bw_event_s {
- uint32_t n_read;
- uint32_t n_written;
-} cached_bw_events[N_BW_EVENTS_TO_CACHE];
-
-/** A second or more has elapsed: tell any interested control
- * connections how much bandwidth we used. */
-int
-control_event_bandwidth_used(uint32_t n_read, uint32_t n_written)
-{
- cached_bw_events[next_measurement_idx].n_read = n_read;
- cached_bw_events[next_measurement_idx].n_written = n_written;
- if (++next_measurement_idx == N_BW_EVENTS_TO_CACHE)
- next_measurement_idx = 0;
- if (n_measurements < N_BW_EVENTS_TO_CACHE)
- ++n_measurements;
-
- if (EVENT_IS_INTERESTING(EVENT_BANDWIDTH_USED)) {
- send_control_event(EVENT_BANDWIDTH_USED,
- "650 BW %lu %lu\r\n",
- (unsigned long)n_read,
- (unsigned long)n_written);
- }
-
- return 0;
-}
-
-STATIC char *
-get_bw_samples(void)
-{
- int i;
- int idx = (next_measurement_idx + N_BW_EVENTS_TO_CACHE - n_measurements)
- % N_BW_EVENTS_TO_CACHE;
- tor_assert(0 <= idx && idx < N_BW_EVENTS_TO_CACHE);
-
- smartlist_t *elements = smartlist_new();
-
- for (i = 0; i < n_measurements; ++i) {
- tor_assert(0 <= idx && idx < N_BW_EVENTS_TO_CACHE);
- const struct cached_bw_event_s *bwe = &cached_bw_events[idx];
-
- smartlist_add_asprintf(elements, "%u,%u",
- (unsigned)bwe->n_read,
- (unsigned)bwe->n_written);
-
- idx = (idx + 1) % N_BW_EVENTS_TO_CACHE;
- }
-
- char *result = smartlist_join_strings(elements, " ", 0, NULL);
-
- SMARTLIST_FOREACH(elements, char *, cp, tor_free(cp));
- smartlist_free(elements);
-
- return result;
-}
-
-/** Called when we are sending a log message to the controllers: suspend
- * sending further log messages to the controllers until we're done. Used by
- * CONN_LOG_PROTECT. */
-void
-disable_control_logging(void)
-{
- ++disable_log_messages;
-}
-
-/** We're done sending a log message to the controllers: re-enable controller
- * logging. Used by CONN_LOG_PROTECT. */
-void
-enable_control_logging(void)
-{
- if (--disable_log_messages < 0)
- tor_assert(0);
-}
-
-/** We got a log message: tell any interested control connections. */
-void
-control_event_logmsg(int severity, uint32_t domain, const char *msg)
-{
- int event;
-
- /* Don't even think of trying to add stuff to a buffer from a cpuworker
- * thread. (See #25987 for plan to fix.) */
- if (! in_main_thread())
- return;
-
- if (disable_log_messages)
- return;
-
- if (domain == LD_BUG && EVENT_IS_INTERESTING(EVENT_STATUS_GENERAL) &&
- severity <= LOG_NOTICE) {
- char *esc = esc_for_log(msg);
- ++disable_log_messages;
- control_event_general_status(severity, "BUG REASON=%s", esc);
- --disable_log_messages;
- tor_free(esc);
- }
-
- event = log_severity_to_event(severity);
- if (event >= 0 && EVENT_IS_INTERESTING(event)) {
- char *b = NULL;
- const char *s;
- if (strchr(msg, '\n')) {
- char *cp;
- b = tor_strdup(msg);
- for (cp = b; *cp; ++cp)
- if (*cp == '\r' || *cp == '\n')
- *cp = ' ';
- }
- switch (severity) {
- case LOG_DEBUG: s = "DEBUG"; break;
- case LOG_INFO: s = "INFO"; break;
- case LOG_NOTICE: s = "NOTICE"; break;
- case LOG_WARN: s = "WARN"; break;
- case LOG_ERR: s = "ERR"; break;
- default: s = "UnknownLogSeverity"; break;
- }
- ++disable_log_messages;
- send_control_event(event, "650 %s %s\r\n", s, b?b:msg);
- if (severity == LOG_ERR) {
- /* Force a flush, since we may be about to die horribly */
- queued_events_flush_all(1);
- }
- --disable_log_messages;
- tor_free(b);
- }
-}
-
-/**
- * Logging callback: called when there is a queued pending log callback.
- */
-void
-control_event_logmsg_pending(void)
-{
- if (! in_main_thread()) {
- /* We can't handle this case yet, since we're using a
- * mainloop_event_t to invoke queued_events_flush_all. We ought to
- * use a different mechanism instead: see #25987.
- **/
- return;
- }
- tor_assert(flush_queued_events_event);
- mainloop_event_activate(flush_queued_events_event);
-}
-
-/** Called whenever we receive new router descriptors: tell any
- * interested control connections. <b>routers</b> is a list of
- * routerinfo_t's.
- */
-int
-control_event_descriptors_changed(smartlist_t *routers)
-{
- char *msg;
-
- if (!EVENT_IS_INTERESTING(EVENT_NEW_DESC))
- return 0;
-
- {
- smartlist_t *names = smartlist_new();
- char *ids;
- SMARTLIST_FOREACH(routers, routerinfo_t *, ri, {
- char *b = tor_malloc(MAX_VERBOSE_NICKNAME_LEN+1);
- router_get_verbose_nickname(b, ri);
- smartlist_add(names, b);
- });
- ids = smartlist_join_strings(names, " ", 0, NULL);
- tor_asprintf(&msg, "650 NEWDESC %s\r\n", ids);
- send_control_event_string(EVENT_NEW_DESC, msg);
- tor_free(ids);
- tor_free(msg);
- SMARTLIST_FOREACH(names, char *, cp, tor_free(cp));
- smartlist_free(names);
- }
- return 0;
-}
-
-/** Called when an address mapping on <b>from</b> from changes to <b>to</b>.
- * <b>expires</b> values less than 3 are special; see connection_edge.c. If
- * <b>error</b> is non-NULL, it is an error code describing the failure
- * mode of the mapping.
- */
-int
-control_event_address_mapped(const char *from, const char *to, time_t expires,
- const char *error, const int cached)
-{
- if (!EVENT_IS_INTERESTING(EVENT_ADDRMAP))
- return 0;
-
- if (expires < 3 || expires == TIME_MAX)
- send_control_event(EVENT_ADDRMAP,
- "650 ADDRMAP %s %s NEVER %s%s"
- "CACHED=\"%s\"\r\n",
- from, to, error?error:"", error?" ":"",
- cached?"YES":"NO");
- else {
- char buf[ISO_TIME_LEN+1];
- char buf2[ISO_TIME_LEN+1];
- format_local_iso_time(buf,expires);
- format_iso_time(buf2,expires);
- send_control_event(EVENT_ADDRMAP,
- "650 ADDRMAP %s %s \"%s\""
- " %s%sEXPIRES=\"%s\" CACHED=\"%s\"\r\n",
- from, to, buf,
- error?error:"", error?" ":"",
- buf2, cached?"YES":"NO");
- }
-
- return 0;
-}
-
/** Cached liveness for network liveness events and GETINFO
*/
static int network_is_live = 0;
-static int
+int
get_cached_network_liveness(void)
{
return network_is_live;
}
-static void
+void
set_cached_network_liveness(int liveness)
{
network_is_live = liveness;
}
-/** The network liveness has changed; this is called from circuitstats.c
- * whenever we receive a cell, or when timeout expires and we assume the
- * network is down. */
-int
-control_event_network_liveness_update(int liveness)
-{
- if (liveness > 0) {
- if (get_cached_network_liveness() <= 0) {
- /* Update cached liveness */
- set_cached_network_liveness(1);
- log_debug(LD_CONTROL, "Sending NETWORK_LIVENESS UP");
- send_control_event_string(EVENT_NETWORK_LIVENESS,
- "650 NETWORK_LIVENESS UP\r\n");
- }
- /* else was already live, no-op */
- } else {
- if (get_cached_network_liveness() > 0) {
- /* Update cached liveness */
- set_cached_network_liveness(0);
- log_debug(LD_CONTROL, "Sending NETWORK_LIVENESS DOWN");
- send_control_event_string(EVENT_NETWORK_LIVENESS,
- "650 NETWORK_LIVENESS DOWN\r\n");
- }
- /* else was already dead, no-op */
- }
-
- return 0;
-}
-
-/** Helper function for NS-style events. Constructs and sends an event
- * of type <b>event</b> with string <b>event_string</b> out of the set of
- * networkstatuses <b>statuses</b>. Currently it is used for NS events
- * and NEWCONSENSUS events. */
-static int
-control_event_networkstatus_changed_helper(smartlist_t *statuses,
- uint16_t event,
- const char *event_string)
-{
- smartlist_t *strs;
- char *s, *esc = NULL;
- if (!EVENT_IS_INTERESTING(event) || !smartlist_len(statuses))
- return 0;
-
- strs = smartlist_new();
- smartlist_add_strdup(strs, "650+");
- smartlist_add_strdup(strs, event_string);
- smartlist_add_strdup(strs, "\r\n");
- SMARTLIST_FOREACH(statuses, const routerstatus_t *, rs,
- {
- s = networkstatus_getinfo_helper_single(rs);
- if (!s) continue;
- smartlist_add(strs, s);
- });
-
- s = smartlist_join_strings(strs, "", 0, NULL);
- write_escaped_data(s, strlen(s), &esc);
- SMARTLIST_FOREACH(strs, char *, cp, tor_free(cp));
- smartlist_free(strs);
- tor_free(s);
- send_control_event_string(event, esc);
- send_control_event_string(event,
- "650 OK\r\n");
-
- tor_free(esc);
- return 0;
-}
-
-/** Called when the routerstatus_ts <b>statuses</b> have changed: sends
- * an NS event to any controller that cares. */
-int
-control_event_networkstatus_changed(smartlist_t *statuses)
-{
- return control_event_networkstatus_changed_helper(statuses, EVENT_NS, "NS");
-}
-
-/** Called when we get a new consensus networkstatus. Sends a NEWCONSENSUS
- * event consisting of an NS-style line for each relay in the consensus. */
-int
-control_event_newconsensus(const networkstatus_t *consensus)
-{
- if (!control_event_is_interesting(EVENT_NEWCONSENSUS))
- return 0;
- return control_event_networkstatus_changed_helper(
- consensus->routerstatus_list, EVENT_NEWCONSENSUS, "NEWCONSENSUS");
-}
-
-/** Called when we compute a new circuitbuildtimeout */
-int
-control_event_buildtimeout_set(buildtimeout_set_event_t type,
- const char *args)
-{
- const char *type_string = NULL;
-
- if (!control_event_is_interesting(EVENT_BUILDTIMEOUT_SET))
- return 0;
-
- switch (type) {
- case BUILDTIMEOUT_SET_EVENT_COMPUTED:
- type_string = "COMPUTED";
- break;
- case BUILDTIMEOUT_SET_EVENT_RESET:
- type_string = "RESET";
- break;
- case BUILDTIMEOUT_SET_EVENT_SUSPENDED:
- type_string = "SUSPENDED";
- break;
- case BUILDTIMEOUT_SET_EVENT_DISCARD:
- type_string = "DISCARD";
- break;
- case BUILDTIMEOUT_SET_EVENT_RESUME:
- type_string = "RESUME";
- break;
- default:
- type_string = "UNKNOWN";
- break;
- }
-
- send_control_event(EVENT_BUILDTIMEOUT_SET,
- "650 BUILDTIMEOUT_SET %s %s\r\n",
- type_string, args);
-
- return 0;
-}
-
-/** Called when a signal has been processed from signal_callback */
-int
-control_event_signal(uintptr_t signal_num)
-{
- const char *signal_string = NULL;
-
- if (!control_event_is_interesting(EVENT_GOT_SIGNAL))
- return 0;
-
- switch (signal_num) {
- case SIGHUP:
- signal_string = "RELOAD";
- break;
- case SIGUSR1:
- signal_string = "DUMP";
- break;
- case SIGUSR2:
- signal_string = "DEBUG";
- break;
- case SIGNEWNYM:
- signal_string = "NEWNYM";
- break;
- case SIGCLEARDNSCACHE:
- signal_string = "CLEARDNSCACHE";
- break;
- case SIGHEARTBEAT:
- signal_string = "HEARTBEAT";
- break;
- default:
- log_warn(LD_BUG, "Unrecognized signal %lu in control_event_signal",
- (unsigned long)signal_num);
- return -1;
- }
-
- send_control_event(EVENT_GOT_SIGNAL, "650 SIGNAL %s\r\n",
- signal_string);
- return 0;
-}
-
-/** Called when a single local_routerstatus_t has changed: Sends an NS event
- * to any controller that cares. */
-int
-control_event_networkstatus_changed_single(const routerstatus_t *rs)
-{
- smartlist_t *statuses;
- int r;
-
- if (!EVENT_IS_INTERESTING(EVENT_NS))
- return 0;
-
- statuses = smartlist_new();
- smartlist_add(statuses, (void*)rs);
- r = control_event_networkstatus_changed(statuses);
- smartlist_free(statuses);
- return r;
-}
-
-/** Our own router descriptor has changed; tell any controllers that care.
- */
-int
-control_event_my_descriptor_changed(void)
-{
- send_control_event(EVENT_DESCCHANGED, "650 DESCCHANGED\r\n");
- return 0;
-}
-
-/** Helper: sends a status event where <b>type</b> is one of
- * EVENT_STATUS_{GENERAL,CLIENT,SERVER}, where <b>severity</b> is one of
- * LOG_{NOTICE,WARN,ERR}, and where <b>format</b> is a printf-style format
- * string corresponding to <b>args</b>. */
-static int
-control_event_status(int type, int severity, const char *format, va_list args)
-{
- char *user_buf = NULL;
- char format_buf[160];
- const char *status, *sev;
-
- switch (type) {
- case EVENT_STATUS_GENERAL:
- status = "STATUS_GENERAL";
- break;
- case EVENT_STATUS_CLIENT:
- status = "STATUS_CLIENT";
- break;
- case EVENT_STATUS_SERVER:
- status = "STATUS_SERVER";
- break;
- default:
- log_warn(LD_BUG, "Unrecognized status type %d", type);
- return -1;
- }
- switch (severity) {
- case LOG_NOTICE:
- sev = "NOTICE";
- break;
- case LOG_WARN:
- sev = "WARN";
- break;
- case LOG_ERR:
- sev = "ERR";
- break;
- default:
- log_warn(LD_BUG, "Unrecognized status severity %d", severity);
- return -1;
- }
- if (tor_snprintf(format_buf, sizeof(format_buf), "650 %s %s",
- status, sev)<0) {
- log_warn(LD_BUG, "Format string too long.");
- return -1;
- }
- tor_vasprintf(&user_buf, format, args);
-
- send_control_event(type, "%s %s\r\n", format_buf, user_buf);
- tor_free(user_buf);
- return 0;
-}
-
-#define CONTROL_EVENT_STATUS_BODY(event, sev) \
- int r; \
- do { \
- va_list ap; \
- if (!EVENT_IS_INTERESTING(event)) \
- return 0; \
- \
- va_start(ap, format); \
- r = control_event_status((event), (sev), format, ap); \
- va_end(ap); \
- } while (0)
-
-/** Format and send an EVENT_STATUS_GENERAL event whose main text is obtained
- * by formatting the arguments using the printf-style <b>format</b>. */
-int
-control_event_general_status(int severity, const char *format, ...)
-{
- CONTROL_EVENT_STATUS_BODY(EVENT_STATUS_GENERAL, severity);
- return r;
-}
-
-/** Format and send an EVENT_STATUS_GENERAL LOG_ERR event, and flush it to the
- * controller(s) immediately. */
-int
-control_event_general_error(const char *format, ...)
-{
- CONTROL_EVENT_STATUS_BODY(EVENT_STATUS_GENERAL, LOG_ERR);
- /* Force a flush, since we may be about to die horribly */
- queued_events_flush_all(1);
- return r;
-}
-
-/** Format and send an EVENT_STATUS_CLIENT event whose main text is obtained
- * by formatting the arguments using the printf-style <b>format</b>. */
-int
-control_event_client_status(int severity, const char *format, ...)
-{
- CONTROL_EVENT_STATUS_BODY(EVENT_STATUS_CLIENT, severity);
- return r;
-}
-
-/** Format and send an EVENT_STATUS_CLIENT LOG_ERR event, and flush it to the
- * controller(s) immediately. */
-int
-control_event_client_error(const char *format, ...)
-{
- CONTROL_EVENT_STATUS_BODY(EVENT_STATUS_CLIENT, LOG_ERR);
- /* Force a flush, since we may be about to die horribly */
- queued_events_flush_all(1);
- return r;
-}
-
-/** Format and send an EVENT_STATUS_SERVER event whose main text is obtained
- * by formatting the arguments using the printf-style <b>format</b>. */
-int
-control_event_server_status(int severity, const char *format, ...)
-{
- CONTROL_EVENT_STATUS_BODY(EVENT_STATUS_SERVER, severity);
- return r;
-}
-
-/** Format and send an EVENT_STATUS_SERVER LOG_ERR event, and flush it to the
- * controller(s) immediately. */
-int
-control_event_server_error(const char *format, ...)
-{
- CONTROL_EVENT_STATUS_BODY(EVENT_STATUS_SERVER, LOG_ERR);
- /* Force a flush, since we may be about to die horribly */
- queued_events_flush_all(1);
- return r;
-}
-
-/** Called when the status of an entry guard with the given <b>nickname</b>
- * and identity <b>digest</b> has changed to <b>status</b>: tells any
- * controllers that care. */
-int
-control_event_guard(const char *nickname, const char *digest,
- const char *status)
-{
- char hbuf[HEX_DIGEST_LEN+1];
- base16_encode(hbuf, sizeof(hbuf), digest, DIGEST_LEN);
- if (!EVENT_IS_INTERESTING(EVENT_GUARD))
- return 0;
-
- {
- char buf[MAX_VERBOSE_NICKNAME_LEN+1];
- const node_t *node = node_get_by_id(digest);
- if (node) {
- node_get_verbose_nickname(node, buf);
- } else {
- tor_snprintf(buf, sizeof(buf), "$%s~%s", hbuf, nickname);
- }
- send_control_event(EVENT_GUARD,
- "650 GUARD ENTRY %s %s\r\n", buf, status);
- }
- return 0;
-}
-
-/** Called when a configuration option changes. This is generally triggered
- * by SETCONF requests and RELOAD/SIGHUP signals. The <b>elements</b> is
- * a smartlist_t containing (key, value, ...) pairs in sequence.
- * <b>value</b> can be NULL. */
-int
-control_event_conf_changed(const smartlist_t *elements)
-{
- int i;
- char *result;
- smartlist_t *lines;
- if (!EVENT_IS_INTERESTING(EVENT_CONF_CHANGED) ||
- smartlist_len(elements) == 0) {
- return 0;
- }
- lines = smartlist_new();
- for (i = 0; i < smartlist_len(elements); i += 2) {
- char *k = smartlist_get(elements, i);
- char *v = smartlist_get(elements, i+1);
- if (v == NULL) {
- smartlist_add_asprintf(lines, "650-%s", k);
- } else {
- smartlist_add_asprintf(lines, "650-%s=%s", k, v);
- }
- }
- result = smartlist_join_strings(lines, "\r\n", 0, NULL);
- send_control_event(EVENT_CONF_CHANGED,
- "650-CONF_CHANGED\r\n%s\r\n650 OK\r\n", result);
- tor_free(result);
- SMARTLIST_FOREACH(lines, char *, cp, tor_free(cp));
- smartlist_free(lines);
- return 0;
-}
-
-/** Helper: Return a newly allocated string containing a path to the
- * file where we store our authentication cookie. */
-char *
-get_controller_cookie_file_name(void)
-{
- const or_options_t *options = get_options();
- if (options->CookieAuthFile && strlen(options->CookieAuthFile)) {
- return tor_strdup(options->CookieAuthFile);
- } else {
- return get_datadir_fname("control_auth_cookie");
- }
-}
-
-/* Initialize the cookie-based authentication system of the
- * ControlPort. If <b>enabled</b> is 0, then disable the cookie
- * authentication system. */
-int
-init_control_cookie_authentication(int enabled)
-{
- char *fname = NULL;
- int retval;
-
- if (!enabled) {
- authentication_cookie_is_set = 0;
- return 0;
- }
-
- fname = get_controller_cookie_file_name();
- retval = init_cookie_authentication(fname, "", /* no header */
- AUTHENTICATION_COOKIE_LEN,
- get_options()->CookieAuthFileGroupReadable,
- &authentication_cookie,
- &authentication_cookie_is_set);
- tor_free(fname);
- return retval;
-}
-
/** A copy of the process specifier of Tor's owning controller, or
* NULL if this Tor instance is not currently owned by a process. */
static char *owning_controller_process_spec = NULL;
@@ -7008,895 +601,12 @@ monitor_owning_controller_process(const char *process_spec)
}
}
-/** Convert the name of a bootstrapping phase <b>s</b> into strings
- * <b>tag</b> and <b>summary</b> suitable for display by the controller. */
-static int
-bootstrap_status_to_string(bootstrap_status_t s, const char **tag,
- const char **summary)
-{
- switch (s) {
- case BOOTSTRAP_STATUS_UNDEF:
- *tag = "undef";
- *summary = "Undefined";
- break;
- case BOOTSTRAP_STATUS_STARTING:
- *tag = "starting";
- *summary = "Starting";
- break;
- case BOOTSTRAP_STATUS_CONN_DIR:
- *tag = "conn_dir";
- *summary = "Connecting to directory server";
- break;
- case BOOTSTRAP_STATUS_HANDSHAKE:
- *tag = "status_handshake";
- *summary = "Finishing handshake";
- break;
- case BOOTSTRAP_STATUS_HANDSHAKE_DIR:
- *tag = "handshake_dir";
- *summary = "Finishing handshake with directory server";
- break;
- case BOOTSTRAP_STATUS_ONEHOP_CREATE:
- *tag = "onehop_create";
- *summary = "Establishing an encrypted directory connection";
- break;
- case BOOTSTRAP_STATUS_REQUESTING_STATUS:
- *tag = "requesting_status";
- *summary = "Asking for networkstatus consensus";
- break;
- case BOOTSTRAP_STATUS_LOADING_STATUS:
- *tag = "loading_status";
- *summary = "Loading networkstatus consensus";
- break;
- case BOOTSTRAP_STATUS_LOADING_KEYS:
- *tag = "loading_keys";
- *summary = "Loading authority key certs";
- break;
- case BOOTSTRAP_STATUS_REQUESTING_DESCRIPTORS:
- *tag = "requesting_descriptors";
- /* XXXX this appears to incorrectly report internal on most loads */
- *summary = router_have_consensus_path() == CONSENSUS_PATH_INTERNAL ?
- "Asking for relay descriptors for internal paths" :
- "Asking for relay descriptors";
- break;
- /* If we're sure there are no exits in the consensus,
- * inform the controller by adding "internal"
- * to the status summaries.
- * (We only check this while loading descriptors,
- * so we may not know in the earlier stages.)
- * But if there are exits, we can't be sure whether
- * we're creating internal or exit paths/circuits.
- * XXXX Or should be use different tags or statuses
- * for internal and exit/all? */
- case BOOTSTRAP_STATUS_LOADING_DESCRIPTORS:
- *tag = "loading_descriptors";
- *summary = router_have_consensus_path() == CONSENSUS_PATH_INTERNAL ?
- "Loading relay descriptors for internal paths" :
- "Loading relay descriptors";
- break;
- case BOOTSTRAP_STATUS_CONN_OR:
- *tag = "conn_or";
- *summary = router_have_consensus_path() == CONSENSUS_PATH_INTERNAL ?
- "Connecting to the Tor network internally" :
- "Connecting to the Tor network";
- break;
- case BOOTSTRAP_STATUS_HANDSHAKE_OR:
- *tag = "handshake_or";
- *summary = router_have_consensus_path() == CONSENSUS_PATH_INTERNAL ?
- "Finishing handshake with first hop of internal circuit" :
- "Finishing handshake with first hop";
- break;
- case BOOTSTRAP_STATUS_CIRCUIT_CREATE:
- *tag = "circuit_create";
- *summary = router_have_consensus_path() == CONSENSUS_PATH_INTERNAL ?
- "Establishing an internal Tor circuit" :
- "Establishing a Tor circuit";
- break;
- case BOOTSTRAP_STATUS_DONE:
- *tag = "done";
- *summary = "Done";
- break;
- default:
-// log_warn(LD_BUG, "Unrecognized bootstrap status code %d", s);
- *tag = *summary = "unknown";
- return -1;
- }
- return 0;
-}
-
-/** What percentage through the bootstrap process are we? We remember
- * this so we can avoid sending redundant bootstrap status events, and
- * so we can guess context for the bootstrap messages which are
- * ambiguous. It starts at 'undef', but gets set to 'starting' while
- * Tor initializes. */
-static int bootstrap_percent = BOOTSTRAP_STATUS_UNDEF;
-
-/** Like bootstrap_percent, but only takes on the enumerated values in
- * bootstrap_status_t.
- */
-static int bootstrap_phase = BOOTSTRAP_STATUS_UNDEF;
-
-/** As bootstrap_percent, but holds the bootstrapping level at which we last
- * logged a NOTICE-level message. We use this, plus BOOTSTRAP_PCT_INCREMENT,
- * to avoid flooding the log with a new message every time we get a few more
- * microdescriptors */
-static int notice_bootstrap_percent = 0;
-
-/** How many problems have we had getting to the next bootstrapping phase?
- * These include failure to establish a connection to a Tor relay,
- * failures to finish the TLS handshake, failures to validate the
- * consensus document, etc. */
-static int bootstrap_problems = 0;
-
-/** We only tell the controller once we've hit a threshold of problems
- * for the current phase. */
-#define BOOTSTRAP_PROBLEM_THRESHOLD 10
-
-/** When our bootstrapping progress level changes, but our bootstrapping
- * status has not advanced, we only log at NOTICE when we have made at least
- * this much progress.
- */
-#define BOOTSTRAP_PCT_INCREMENT 5
-
-/** Do the actual logging and notifications for
- * control_event_bootstrap(). Doesn't change any state beyond that.
- */
-static void
-control_event_bootstrap_core(int loglevel, bootstrap_status_t status,
- int progress)
-{
- char buf[BOOTSTRAP_MSG_LEN];
- const char *tag, *summary;
-
- bootstrap_status_to_string(status, &tag, &summary);
- /* Locally reset status if there's incremental progress */
- if (progress)
- status = progress;
-
- tor_log(loglevel, LD_CONTROL,
- "Bootstrapped %d%%: %s", status, summary);
- tor_snprintf(buf, sizeof(buf),
- "BOOTSTRAP PROGRESS=%d TAG=%s SUMMARY=\"%s\"",
- status, tag, summary);
- tor_snprintf(last_sent_bootstrap_message,
- sizeof(last_sent_bootstrap_message),
- "NOTICE %s", buf);
- control_event_client_status(LOG_NOTICE, "%s", buf);
-}
-
-/** Called when Tor has made progress at bootstrapping its directory
- * information and initial circuits.
- *
- * <b>status</b> is the new status, that is, what task we will be doing
- * next. <b>progress</b> is zero if we just started this task, else it
- * represents progress on the task.
- */
-void
-control_event_bootstrap(bootstrap_status_t status, int progress)
-{
- int loglevel = LOG_NOTICE;
-
- if (bootstrap_percent == BOOTSTRAP_STATUS_DONE)
- return; /* already bootstrapped; nothing to be done here. */
-
- /* special case for handshaking status, since our TLS handshaking code
- * can't distinguish what the connection is going to be for. */
- if (status == BOOTSTRAP_STATUS_HANDSHAKE) {
- if (bootstrap_percent < BOOTSTRAP_STATUS_CONN_OR) {
- status = BOOTSTRAP_STATUS_HANDSHAKE_DIR;
- } else {
- status = BOOTSTRAP_STATUS_HANDSHAKE_OR;
- }
- }
-
- if (status <= bootstrap_percent) {
- /* If there's no new progress, return early. */
- if (!progress || progress <= bootstrap_percent)
- return;
- /* Log at INFO if not enough progress happened. */
- if (progress < notice_bootstrap_percent + BOOTSTRAP_PCT_INCREMENT)
- loglevel = LOG_INFO;
- }
-
- control_event_bootstrap_core(loglevel, status, progress);
-
- if (status > bootstrap_percent) {
- bootstrap_phase = status; /* new milestone reached */
- bootstrap_percent = status;
- }
- if (progress > bootstrap_percent) {
- /* incremental progress within a milestone */
- bootstrap_percent = progress;
- bootstrap_problems = 0; /* Progress! Reset our problem counter. */
- }
- if (loglevel == LOG_NOTICE &&
- bootstrap_percent > notice_bootstrap_percent) {
- /* Remember that we gave a notice at this level. */
- notice_bootstrap_percent = bootstrap_percent;
- }
-}
-
-/** Flag whether we've opened an OR_CONN yet */
-static int bootstrap_first_orconn = 0;
-
-/** Like bootstrap_phase, but for (possibly deferred) directory progress */
-static int bootstrap_dir_phase = BOOTSTRAP_STATUS_UNDEF;
-
-/** Like bootstrap_problems, but for (possibly deferred) directory progress */
-static int bootstrap_dir_progress = BOOTSTRAP_STATUS_UNDEF;
-
-/** Defer directory info bootstrap events until we have successfully
- * completed our first connection to a router. */
-void
-control_event_boot_dir(bootstrap_status_t status, int progress)
-{
- if (status > bootstrap_dir_progress) {
- bootstrap_dir_progress = status;
- bootstrap_dir_phase = status;
- }
- if (progress && progress >= bootstrap_dir_progress) {
- bootstrap_dir_progress = progress;
- }
-
- /* Don't report unless we have successfully opened at least one OR_CONN */
- if (!bootstrap_first_orconn)
- return;
-
- control_event_bootstrap(status, progress);
-}
-
-/** Set a flag to allow reporting of directory bootstrap progress.
- * (Code that reports completion of an OR_CONN calls this.) Also,
- * report directory progress so far. */
-void
-control_event_boot_first_orconn(void)
-{
- bootstrap_first_orconn = 1;
- control_event_bootstrap(bootstrap_dir_phase, bootstrap_dir_progress);
-}
-
-/** Called when Tor has failed to make bootstrapping progress in a way
- * that indicates a problem. <b>warn</b> gives a human-readable hint
- * as to why, and <b>reason</b> provides a controller-facing short
- * tag. <b>conn</b> is the connection that caused this problem and
- * can be NULL if a connection cannot be easily identified.
- */
-void
-control_event_bootstrap_problem(const char *warn, const char *reason,
- const connection_t *conn, int dowarn)
-{
- int status = bootstrap_percent;
- const char *tag = "", *summary = "";
- char buf[BOOTSTRAP_MSG_LEN];
- const char *recommendation = "ignore";
- int severity;
- char *or_id = NULL, *hostaddr = NULL;
- or_connection_t *or_conn = NULL;
-
- /* bootstrap_percent must not be in "undefined" state here. */
- tor_assert(status >= 0);
-
- if (bootstrap_percent == 100)
- return; /* already bootstrapped; nothing to be done here. */
-
- bootstrap_problems++;
-
- if (bootstrap_problems >= BOOTSTRAP_PROBLEM_THRESHOLD)
- dowarn = 1;
-
- /* Don't warn about our bootstrapping status if we are hibernating or
- * shutting down. */
- if (we_are_hibernating())
- dowarn = 0;
-
- tor_assert(bootstrap_status_to_string(bootstrap_phase, &tag, &summary) == 0);
-
- severity = dowarn ? LOG_WARN : LOG_INFO;
-
- if (dowarn)
- recommendation = "warn";
-
- if (conn && conn->type == CONN_TYPE_OR) {
- /* XXX TO_OR_CONN can't deal with const */
- or_conn = TO_OR_CONN((connection_t *)conn);
- or_id = tor_strdup(hex_str(or_conn->identity_digest, DIGEST_LEN));
- } else {
- or_id = tor_strdup("?");
- }
-
- if (conn)
- tor_asprintf(&hostaddr, "%s:%d", conn->address, (int)conn->port);
- else
- hostaddr = tor_strdup("?");
-
- log_fn(severity,
- LD_CONTROL, "Problem bootstrapping. Stuck at %d%%: %s. (%s; %s; "
- "count %d; recommendation %s; host %s at %s)",
- status, summary, warn, reason,
- bootstrap_problems, recommendation,
- or_id, hostaddr);
-
- connection_or_report_broken_states(severity, LD_HANDSHAKE);
-
- tor_snprintf(buf, sizeof(buf),
- "BOOTSTRAP PROGRESS=%d TAG=%s SUMMARY=\"%s\" WARNING=\"%s\" REASON=%s "
- "COUNT=%d RECOMMENDATION=%s HOSTID=\"%s\" HOSTADDR=\"%s\"",
- bootstrap_percent, tag, summary, warn, reason, bootstrap_problems,
- recommendation,
- or_id, hostaddr);
-
- tor_snprintf(last_sent_bootstrap_message,
- sizeof(last_sent_bootstrap_message),
- "WARN %s", buf);
- control_event_client_status(LOG_WARN, "%s", buf);
-
- tor_free(hostaddr);
- tor_free(or_id);
-}
-
-/** Called when Tor has failed to make bootstrapping progress in a way
- * that indicates a problem. <b>warn</b> gives a hint as to why, and
- * <b>reason</b> provides an "or_conn_end_reason" tag. <b>or_conn</b>
- * is the connection that caused this problem.
- */
-MOCK_IMPL(void,
-control_event_bootstrap_prob_or, (const char *warn, int reason,
- or_connection_t *or_conn))
-{
- int dowarn = 0;
-
- if (or_conn->have_noted_bootstrap_problem)
- return;
-
- or_conn->have_noted_bootstrap_problem = 1;
-
- if (reason == END_OR_CONN_REASON_NO_ROUTE)
- dowarn = 1;
-
- /* If we are using bridges and all our OR connections are now
- closed, it means that we totally failed to connect to our
- bridges. Throw a warning. */
- if (get_options()->UseBridges && !any_other_active_or_conns(or_conn))
- dowarn = 1;
-
- control_event_bootstrap_problem(warn,
- orconn_end_reason_to_control_string(reason),
- TO_CONN(or_conn), dowarn);
-}
-
-/** We just generated a new summary of which countries we've seen clients
- * from recently. Send a copy to the controller in case it wants to
- * display it for the user. */
-void
-control_event_clients_seen(const char *controller_str)
-{
- send_control_event(EVENT_CLIENTS_SEEN,
- "650 CLIENTS_SEEN %s\r\n", controller_str);
-}
-
-/** A new pluggable transport called <b>transport_name</b> was
- * launched on <b>addr</b>:<b>port</b>. <b>mode</b> is either
- * "server" or "client" depending on the mode of the pluggable
- * transport.
- * "650" SP "TRANSPORT_LAUNCHED" SP Mode SP Name SP Address SP Port
- */
-void
-control_event_transport_launched(const char *mode, const char *transport_name,
- tor_addr_t *addr, uint16_t port)
-{
- send_control_event(EVENT_TRANSPORT_LAUNCHED,
- "650 TRANSPORT_LAUNCHED %s %s %s %u\r\n",
- mode, transport_name, fmt_addr(addr), port);
-}
-
-/** Convert rendezvous auth type to string for HS_DESC control events
- */
-const char *
-rend_auth_type_to_string(rend_auth_type_t auth_type)
-{
- const char *str;
-
- switch (auth_type) {
- case REND_NO_AUTH:
- str = "NO_AUTH";
- break;
- case REND_BASIC_AUTH:
- str = "BASIC_AUTH";
- break;
- case REND_STEALTH_AUTH:
- str = "STEALTH_AUTH";
- break;
- default:
- str = "UNKNOWN";
- }
-
- return str;
-}
-
-/** Return a longname the node whose identity is <b>id_digest</b>. If
- * node_get_by_id() returns NULL, base 16 encoding of <b>id_digest</b> is
- * returned instead.
- *
- * This function is not thread-safe. Each call to this function invalidates
- * previous values returned by this function.
- */
-MOCK_IMPL(const char *,
-node_describe_longname_by_id,(const char *id_digest))
-{
- static char longname[MAX_VERBOSE_NICKNAME_LEN+1];
- node_get_verbose_nickname_by_id(id_digest, longname);
- return longname;
-}
-
-/** Return either the onion address if the given pointer is a non empty
- * string else the unknown string. */
-static const char *
-rend_hsaddress_str_or_unknown(const char *onion_address)
-{
- static const char *str_unknown = "UNKNOWN";
- const char *str_ret = str_unknown;
-
- /* No valid pointer, unknown it is. */
- if (!onion_address) {
- goto end;
- }
- /* Empty onion address thus we don't know, unknown it is. */
- if (onion_address[0] == '\0') {
- goto end;
- }
- /* All checks are good so return the given onion address. */
- str_ret = onion_address;
-
- end:
- return str_ret;
-}
-
-/** send HS_DESC requested event.
- *
- * <b>rend_query</b> is used to fetch requested onion address and auth type.
- * <b>hs_dir</b> is the description of contacting hs directory.
- * <b>desc_id_base32</b> is the ID of requested hs descriptor.
- * <b>hsdir_index</b> is the HSDir fetch index value for v3, an hex string.
- */
-void
-control_event_hs_descriptor_requested(const char *onion_address,
- rend_auth_type_t auth_type,
- const char *id_digest,
- const char *desc_id,
- const char *hsdir_index)
-{
- char *hsdir_index_field = NULL;
-
- if (BUG(!id_digest || !desc_id)) {
- return;
- }
-
- if (hsdir_index) {
- tor_asprintf(&hsdir_index_field, " HSDIR_INDEX=%s", hsdir_index);
- }
-
- send_control_event(EVENT_HS_DESC,
- "650 HS_DESC REQUESTED %s %s %s %s%s\r\n",
- rend_hsaddress_str_or_unknown(onion_address),
- rend_auth_type_to_string(auth_type),
- node_describe_longname_by_id(id_digest),
- desc_id,
- hsdir_index_field ? hsdir_index_field : "");
- tor_free(hsdir_index_field);
-}
-
-/** For an HS descriptor query <b>rend_data</b>, using the
- * <b>onion_address</b> and HSDir fingerprint <b>hsdir_fp</b>, find out
- * which descriptor ID in the query is the right one.
- *
- * Return a pointer of the binary descriptor ID found in the query's object
- * or NULL if not found. */
-static const char *
-get_desc_id_from_query(const rend_data_t *rend_data, const char *hsdir_fp)
-{
- int replica;
- const char *desc_id = NULL;
- const rend_data_v2_t *rend_data_v2 = TO_REND_DATA_V2(rend_data);
-
- /* Possible if the fetch was done using a descriptor ID. This means that
- * the HSFETCH command was used. */
- if (!tor_digest_is_zero(rend_data_v2->desc_id_fetch)) {
- desc_id = rend_data_v2->desc_id_fetch;
- goto end;
- }
-
- /* Without a directory fingerprint at this stage, we can't do much. */
- if (hsdir_fp == NULL) {
- goto end;
- }
-
- /* OK, we have an onion address so now let's find which descriptor ID
- * is the one associated with the HSDir fingerprint. */
- for (replica = 0; replica < REND_NUMBER_OF_NON_CONSECUTIVE_REPLICAS;
- replica++) {
- const char *digest = rend_data_get_desc_id(rend_data, replica, NULL);
-
- SMARTLIST_FOREACH_BEGIN(rend_data->hsdirs_fp, char *, fingerprint) {
- if (tor_memcmp(fingerprint, hsdir_fp, DIGEST_LEN) == 0) {
- /* Found it! This descriptor ID is the right one. */
- desc_id = digest;
- goto end;
- }
- } SMARTLIST_FOREACH_END(fingerprint);
- }
-
- end:
- return desc_id;
-}
-
-/** send HS_DESC CREATED event when a local service generates a descriptor.
- *
- * <b>onion_address</b> is service address.
- * <b>desc_id</b> is the descriptor ID.
- * <b>replica</b> is the the descriptor replica number. If it is negative, it
- * is ignored.
- */
-void
-control_event_hs_descriptor_created(const char *onion_address,
- const char *desc_id,
- int replica)
-{
- char *replica_field = NULL;
-
- if (BUG(!onion_address || !desc_id)) {
- return;
- }
-
- if (replica >= 0) {
- tor_asprintf(&replica_field, " REPLICA=%d", replica);
- }
-
- send_control_event(EVENT_HS_DESC,
- "650 HS_DESC CREATED %s UNKNOWN UNKNOWN %s%s\r\n",
- onion_address, desc_id,
- replica_field ? replica_field : "");
- tor_free(replica_field);
-}
-
-/** send HS_DESC upload event.
- *
- * <b>onion_address</b> is service address.
- * <b>hs_dir</b> is the description of contacting hs directory.
- * <b>desc_id</b> is the ID of requested hs descriptor.
- */
-void
-control_event_hs_descriptor_upload(const char *onion_address,
- const char *id_digest,
- const char *desc_id,
- const char *hsdir_index)
-{
- char *hsdir_index_field = NULL;
-
- if (BUG(!onion_address || !id_digest || !desc_id)) {
- return;
- }
-
- if (hsdir_index) {
- tor_asprintf(&hsdir_index_field, " HSDIR_INDEX=%s", hsdir_index);
- }
-
- send_control_event(EVENT_HS_DESC,
- "650 HS_DESC UPLOAD %s UNKNOWN %s %s%s\r\n",
- onion_address,
- node_describe_longname_by_id(id_digest),
- desc_id,
- hsdir_index_field ? hsdir_index_field : "");
- tor_free(hsdir_index_field);
-}
-
-/** send HS_DESC event after got response from hs directory.
- *
- * NOTE: this is an internal function used by following functions:
- * control_event_hsv2_descriptor_received
- * control_event_hsv2_descriptor_failed
- * control_event_hsv3_descriptor_failed
- *
- * So do not call this function directly.
- */
-static void
-event_hs_descriptor_receive_end(const char *action,
- const char *onion_address,
- const char *desc_id,
- rend_auth_type_t auth_type,
- const char *hsdir_id_digest,
- const char *reason)
-{
- char *reason_field = NULL;
-
- if (BUG(!action || !onion_address)) {
- return;
- }
-
- if (reason) {
- tor_asprintf(&reason_field, " REASON=%s", reason);
- }
-
- send_control_event(EVENT_HS_DESC,
- "650 HS_DESC %s %s %s %s%s%s\r\n",
- action,
- rend_hsaddress_str_or_unknown(onion_address),
- rend_auth_type_to_string(auth_type),
- hsdir_id_digest ?
- node_describe_longname_by_id(hsdir_id_digest) :
- "UNKNOWN",
- desc_id ? desc_id : "",
- reason_field ? reason_field : "");
-
- tor_free(reason_field);
-}
-
-/** send HS_DESC event after got response from hs directory.
- *
- * NOTE: this is an internal function used by following functions:
- * control_event_hs_descriptor_uploaded
- * control_event_hs_descriptor_upload_failed
- *
- * So do not call this function directly.
- */
-void
-control_event_hs_descriptor_upload_end(const char *action,
- const char *onion_address,
- const char *id_digest,
- const char *reason)
-{
- char *reason_field = NULL;
-
- if (BUG(!action || !id_digest)) {
- return;
- }
-
- if (reason) {
- tor_asprintf(&reason_field, " REASON=%s", reason);
- }
-
- send_control_event(EVENT_HS_DESC,
- "650 HS_DESC %s %s UNKNOWN %s%s\r\n",
- action,
- rend_hsaddress_str_or_unknown(onion_address),
- node_describe_longname_by_id(id_digest),
- reason_field ? reason_field : "");
-
- tor_free(reason_field);
-}
-
-/** send HS_DESC RECEIVED event
- *
- * called when we successfully received a hidden service descriptor.
- */
-void
-control_event_hsv2_descriptor_received(const char *onion_address,
- const rend_data_t *rend_data,
- const char *hsdir_id_digest)
-{
- char *desc_id_field = NULL;
- const char *desc_id;
-
- if (BUG(!rend_data || !hsdir_id_digest || !onion_address)) {
- return;
- }
-
- desc_id = get_desc_id_from_query(rend_data, hsdir_id_digest);
- if (desc_id != NULL) {
- char desc_id_base32[REND_DESC_ID_V2_LEN_BASE32 + 1];
- /* Set the descriptor ID digest to base32 so we can send it. */
- base32_encode(desc_id_base32, sizeof(desc_id_base32), desc_id,
- DIGEST_LEN);
- /* Extra whitespace is needed before the value. */
- tor_asprintf(&desc_id_field, " %s", desc_id_base32);
- }
-
- event_hs_descriptor_receive_end("RECEIVED", onion_address, desc_id_field,
- TO_REND_DATA_V2(rend_data)->auth_type,
- hsdir_id_digest, NULL);
- tor_free(desc_id_field);
-}
-
-/* Send HS_DESC RECEIVED event
- *
- * Called when we successfully received a hidden service descriptor. */
-void
-control_event_hsv3_descriptor_received(const char *onion_address,
- const char *desc_id,
- const char *hsdir_id_digest)
-{
- char *desc_id_field = NULL;
-
- if (BUG(!onion_address || !desc_id || !hsdir_id_digest)) {
- return;
- }
-
- /* Because DescriptorID is an optional positional value, we need to add a
- * whitespace before in order to not be next to the HsDir value. */
- tor_asprintf(&desc_id_field, " %s", desc_id);
-
- event_hs_descriptor_receive_end("RECEIVED", onion_address, desc_id_field,
- REND_NO_AUTH, hsdir_id_digest, NULL);
- tor_free(desc_id_field);
-}
-
-/** send HS_DESC UPLOADED event
- *
- * called when we successfully uploaded a hidden service descriptor.
- */
-void
-control_event_hs_descriptor_uploaded(const char *id_digest,
- const char *onion_address)
-{
- if (BUG(!id_digest)) {
- return;
- }
-
- control_event_hs_descriptor_upload_end("UPLOADED", onion_address,
- id_digest, NULL);
-}
-
-/** Send HS_DESC event to inform controller that query <b>rend_data</b>
- * failed to retrieve hidden service descriptor from directory identified by
- * <b>id_digest</b>. If NULL, "UNKNOWN" is used. If <b>reason</b> is not NULL,
- * add it to REASON= field.
- */
-void
-control_event_hsv2_descriptor_failed(const rend_data_t *rend_data,
- const char *hsdir_id_digest,
- const char *reason)
-{
- char *desc_id_field = NULL;
- const char *desc_id;
-
- if (BUG(!rend_data)) {
- return;
- }
-
- desc_id = get_desc_id_from_query(rend_data, hsdir_id_digest);
- if (desc_id != NULL) {
- char desc_id_base32[REND_DESC_ID_V2_LEN_BASE32 + 1];
- /* Set the descriptor ID digest to base32 so we can send it. */
- base32_encode(desc_id_base32, sizeof(desc_id_base32), desc_id,
- DIGEST_LEN);
- /* Extra whitespace is needed before the value. */
- tor_asprintf(&desc_id_field, " %s", desc_id_base32);
- }
-
- event_hs_descriptor_receive_end("FAILED", rend_data_get_address(rend_data),
- desc_id_field,
- TO_REND_DATA_V2(rend_data)->auth_type,
- hsdir_id_digest, reason);
- tor_free(desc_id_field);
-}
-
-/** Send HS_DESC event to inform controller that the query to
- * <b>onion_address</b> failed to retrieve hidden service descriptor
- * <b>desc_id</b> from directory identified by <b>hsdir_id_digest</b>. If
- * NULL, "UNKNOWN" is used. If <b>reason</b> is not NULL, add it to REASON=
- * field. */
-void
-control_event_hsv3_descriptor_failed(const char *onion_address,
- const char *desc_id,
- const char *hsdir_id_digest,
- const char *reason)
-{
- char *desc_id_field = NULL;
-
- if (BUG(!onion_address || !desc_id || !reason)) {
- return;
- }
-
- /* Because DescriptorID is an optional positional value, we need to add a
- * whitespace before in order to not be next to the HsDir value. */
- tor_asprintf(&desc_id_field, " %s", desc_id);
-
- event_hs_descriptor_receive_end("FAILED", onion_address, desc_id_field,
- REND_NO_AUTH, hsdir_id_digest, reason);
- tor_free(desc_id_field);
-}
-
-/** Send HS_DESC_CONTENT event after completion of a successful fetch
- * from hs directory. If <b>hsdir_id_digest</b> is NULL, it is replaced
- * by "UNKNOWN". If <b>content</b> is NULL, it is replaced by an empty
- * string. The <b>onion_address</b> or <b>desc_id</b> set to NULL will
- * not trigger the control event. */
-void
-control_event_hs_descriptor_content(const char *onion_address,
- const char *desc_id,
- const char *hsdir_id_digest,
- const char *content)
-{
- static const char *event_name = "HS_DESC_CONTENT";
- char *esc_content = NULL;
-
- if (!onion_address || !desc_id) {
- log_warn(LD_BUG, "Called with onion_address==%p, desc_id==%p, ",
- onion_address, desc_id);
- return;
- }
-
- if (content == NULL) {
- /* Point it to empty content so it can still be escaped. */
- content = "";
- }
- write_escaped_data(content, strlen(content), &esc_content);
-
- send_control_event(EVENT_HS_DESC_CONTENT,
- "650+%s %s %s %s\r\n%s650 OK\r\n",
- event_name,
- rend_hsaddress_str_or_unknown(onion_address),
- desc_id,
- hsdir_id_digest ?
- node_describe_longname_by_id(hsdir_id_digest) :
- "UNKNOWN",
- esc_content);
- tor_free(esc_content);
-}
-
-/** Send HS_DESC event to inform controller upload of hidden service
- * descriptor identified by <b>id_digest</b> failed. If <b>reason</b>
- * is not NULL, add it to REASON= field.
- */
-void
-control_event_hs_descriptor_upload_failed(const char *id_digest,
- const char *onion_address,
- const char *reason)
-{
- if (BUG(!id_digest)) {
- return;
- }
- control_event_hs_descriptor_upload_end("FAILED", onion_address,
- id_digest, reason);
-}
-
/** Free any leftover allocated memory of the control.c subsystem. */
void
control_free_all(void)
{
- smartlist_t *queued_events = NULL;
-
- stats_prev_n_read = stats_prev_n_written = 0;
-
- if (authentication_cookie) /* Free the auth cookie */
- tor_free(authentication_cookie);
- if (detached_onion_services) { /* Free the detached onion services */
- SMARTLIST_FOREACH(detached_onion_services, char *, cp, tor_free(cp));
- smartlist_free(detached_onion_services);
- }
-
- if (queued_control_events_lock) {
- tor_mutex_acquire(queued_control_events_lock);
- flush_queued_event_pending = 0;
- queued_events = queued_control_events;
- queued_control_events = NULL;
- tor_mutex_release(queued_control_events_lock);
- }
- if (queued_events) {
- SMARTLIST_FOREACH(queued_events, queued_event_t *, ev,
- queued_event_free(ev));
- smartlist_free(queued_events);
- }
- if (flush_queued_events_event) {
- mainloop_event_free(flush_queued_events_event);
- flush_queued_events_event = NULL;
- }
- bootstrap_percent = BOOTSTRAP_STATUS_UNDEF;
- bootstrap_phase = BOOTSTRAP_STATUS_UNDEF;
- notice_bootstrap_percent = 0;
- bootstrap_problems = 0;
- bootstrap_first_orconn = 0;
- bootstrap_dir_progress = BOOTSTRAP_STATUS_UNDEF;
- bootstrap_dir_phase = BOOTSTRAP_STATUS_UNDEF;
- authentication_cookie_is_set = 0;
- global_event_mask = 0;
- disable_log_messages = 0;
- memset(last_sent_bootstrap_message, 0, sizeof(last_sent_bootstrap_message));
-}
-
-#ifdef TOR_UNIT_TESTS
-/* For testing: change the value of global_event_mask */
-void
-control_testing_set_global_event_mask(uint64_t mask)
-{
- global_event_mask = mask;
+ control_auth_free_all();
+ control_events_free_all();
+ control_cmd_free_all();
+ control_event_bootstrap_reset();
}
-#endif /* defined(TOR_UNIT_TESTS) */
7apu2bq3rhoylwmucxizk54afw5jyda7pho4j5zdcqpwkufke7zdzwad.onion