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Diffstat (limited to 'src/or/router.c')
-rw-r--r--src/or/router.c566
1 files changed, 396 insertions, 170 deletions
diff --git a/src/or/router.c b/src/or/router.c
index ba7be3d7d7..c15b9b236e 100644
--- a/src/or/router.c
+++ b/src/or/router.c
@@ -7,6 +7,24 @@
#define ROUTER_PRIVATE
#include "or.h"
+#include "circuitlist.h"
+#include "circuituse.h"
+#include "config.h"
+#include "connection.h"
+#include "control.h"
+#include "directory.h"
+#include "dirserv.h"
+#include "dns.h"
+#include "geoip.h"
+#include "hibernate.h"
+#include "main.h"
+#include "networkstatus.h"
+#include "policies.h"
+#include "relay.h"
+#include "rephist.h"
+#include "router.h"
+#include "routerlist.h"
+#include "routerparse.h"
/**
* \file router.c
@@ -31,11 +49,15 @@ static crypto_pk_env_t *onionkey=NULL;
/** Previous private onionskin decryption key: used to decode CREATE cells
* generated by clients that have an older version of our descriptor. */
static crypto_pk_env_t *lastonionkey=NULL;
-/** Private "identity key": used to sign directory info and TLS
+/** Private server "identity key": used to sign directory info and TLS
* certificates. Never changes. */
-static crypto_pk_env_t *identitykey=NULL;
-/** Digest of identitykey. */
-static char identitykey_digest[DIGEST_LEN];
+static crypto_pk_env_t *server_identitykey=NULL;
+/** Digest of server_identitykey. */
+static char server_identitykey_digest[DIGEST_LEN];
+/** Private client "identity key": used to sign bridges' and clients'
+ * outbound TLS certificates. Regenerated on startup and on IP address
+ * change. */
+static crypto_pk_env_t *client_identitykey=NULL;
/** Signing key used for v3 directory material; only set for authorities. */
static crypto_pk_env_t *authority_signing_key = NULL;
/** Key certificate to authenticate v3 directory material; only set for
@@ -61,8 +83,7 @@ static void
set_onion_key(crypto_pk_env_t *k)
{
tor_mutex_acquire(key_lock);
- if (onionkey)
- crypto_free_pk_env(onionkey);
+ crypto_free_pk_env(onionkey);
onionkey = k;
onionkey_set_at = time(NULL);
tor_mutex_release(key_lock);
@@ -106,32 +127,78 @@ get_onion_key_set_at(void)
return onionkey_set_at;
}
-/** Set the current identity key to k.
+/** Set the current server identity key to <b>k</b>.
*/
void
-set_identity_key(crypto_pk_env_t *k)
+set_server_identity_key(crypto_pk_env_t *k)
{
- if (identitykey)
- crypto_free_pk_env(identitykey);
- identitykey = k;
- crypto_pk_get_digest(identitykey, identitykey_digest);
+ crypto_free_pk_env(server_identitykey);
+ server_identitykey = k;
+ crypto_pk_get_digest(server_identitykey, server_identitykey_digest);
}
-/** Returns the current identity key; requires that the identity key has been
- * set.
+/** Make sure that we have set up our identity keys to match or not match as
+ * appropriate, and die with an assertion if we have not. */
+static void
+assert_identity_keys_ok(void)
+{
+ tor_assert(client_identitykey);
+ if (public_server_mode(get_options())) {
+ /* assert that we have set the client and server keys to be equal */
+ tor_assert(server_identitykey);
+ tor_assert(0==crypto_pk_cmp_keys(client_identitykey, server_identitykey));
+ } else {
+ /* assert that we have set the client and server keys to be unequal */
+ if (server_identitykey)
+ tor_assert(0!=crypto_pk_cmp_keys(client_identitykey,
+ server_identitykey));
+ }
+}
+
+/** Returns the current server identity key; requires that the key has
+ * been set, and that we are running as a Tor server.
*/
crypto_pk_env_t *
-get_identity_key(void)
+get_server_identity_key(void)
{
- tor_assert(identitykey);
- return identitykey;
+ tor_assert(server_identitykey);
+ tor_assert(server_mode(get_options()));
+ assert_identity_keys_ok();
+ return server_identitykey;
}
-/** Return true iff the identity key has been set. */
+/** Return true iff the server identity key has been set. */
int
-identity_key_is_set(void)
+server_identity_key_is_set(void)
{
- return identitykey != NULL;
+ return server_identitykey != NULL;
+}
+
+/** Set the current client identity key to <b>k</b>.
+ */
+void
+set_client_identity_key(crypto_pk_env_t *k)
+{
+ crypto_free_pk_env(client_identitykey);
+ client_identitykey = k;
+}
+
+/** Returns the current client identity key for use on outgoing TLS
+ * connections; requires that the key has been set.
+ */
+crypto_pk_env_t *
+get_tlsclient_identity_key(void)
+{
+ tor_assert(client_identitykey);
+ assert_identity_keys_ok();
+ return client_identitykey;
+}
+
+/** Return true iff the client identity key has been set. */
+int
+client_identity_key_is_set(void)
+{
+ return client_identitykey != NULL;
}
/** Return the key certificate for this v3 (voting) authority, or NULL
@@ -201,8 +268,7 @@ rotate_onion_key(void)
}
log_info(LD_GENERAL, "Rotating onion key");
tor_mutex_acquire(key_lock);
- if (lastonionkey)
- crypto_free_pk_env(lastonionkey);
+ crypto_free_pk_env(lastonionkey);
lastonionkey = onionkey;
onionkey = prkey;
now = time(NULL);
@@ -331,10 +397,9 @@ load_authority_keyset(int legacy, crypto_pk_env_t **key_out,
goto done;
}
- if (*key_out)
- crypto_free_pk_env(*key_out);
- if (*cert_out)
- authority_cert_free(*cert_out);
+ crypto_free_pk_env(*key_out);
+ authority_cert_free(*cert_out);
+
*key_out = signing_key;
*cert_out = parsed;
r = 0;
@@ -344,10 +409,8 @@ load_authority_keyset(int legacy, crypto_pk_env_t **key_out,
done:
tor_free(fname);
tor_free(cert);
- if (signing_key)
- crypto_free_pk_env(signing_key);
- if (parsed)
- authority_cert_free(parsed);
+ crypto_free_pk_env(signing_key);
+ authority_cert_free(parsed);
return r;
}
@@ -442,7 +505,9 @@ init_keys(void)
key_lock = tor_mutex_new();
/* There are a couple of paths that put us here before */
- if (crypto_global_init(get_options()->HardwareAccel)) {
+ if (crypto_global_init(get_options()->HardwareAccel,
+ get_options()->AccelName,
+ get_options()->AccelDir)) {
log_err(LD_BUG, "Unable to initialize OpenSSL. Exiting.");
return -1;
}
@@ -456,9 +521,12 @@ init_keys(void)
crypto_free_pk_env(prkey);
return -1;
}
- set_identity_key(prkey);
- /* Create a TLS context; default the client nickname to "client". */
- if (tor_tls_context_new(get_identity_key(), MAX_SSL_KEY_LIFETIME) < 0) {
+ set_client_identity_key(prkey);
+ /* Create a TLS context. */
+ if (tor_tls_context_init(0,
+ get_tlsclient_identity_key(),
+ NULL,
+ MAX_SSL_KEY_LIFETIME) < 0) {
log_err(LD_GENERAL,"Error creating TLS context for Tor client.");
return -1;
}
@@ -493,13 +561,28 @@ init_keys(void)
}
}
- /* 1. Read identity key. Make it if none is found. */
+ /* 1b. Read identity key. Make it if none is found. */
keydir = get_datadir_fname2("keys", "secret_id_key");
log_info(LD_GENERAL,"Reading/making identity key \"%s\"...",keydir);
prkey = init_key_from_file(keydir, 1, LOG_ERR);
tor_free(keydir);
if (!prkey) return -1;
- set_identity_key(prkey);
+ set_server_identity_key(prkey);
+
+ /* 1c. If we are configured as a bridge, generate a client key;
+ * otherwise, set the server identity key as our client identity
+ * key. */
+ if (public_server_mode(options)) {
+ set_client_identity_key(crypto_pk_dup_key(prkey)); /* set above */
+ } else {
+ if (!(prkey = crypto_new_pk_env()))
+ return -1;
+ if (crypto_pk_generate_key(prkey)) {
+ crypto_free_pk_env(prkey);
+ return -1;
+ }
+ set_client_identity_key(prkey);
+ }
/* 2. Read onion key. Make it if none is found. */
keydir = get_datadir_fname2("keys", "secret_onion_key");
@@ -536,18 +619,22 @@ init_keys(void)
tor_free(keydir);
/* 3. Initialize link key and TLS context. */
- if (tor_tls_context_new(get_identity_key(), MAX_SSL_KEY_LIFETIME) < 0) {
+ if (tor_tls_context_init(public_server_mode(options),
+ get_tlsclient_identity_key(),
+ get_server_identity_key(),
+ MAX_SSL_KEY_LIFETIME) < 0) {
log_err(LD_GENERAL,"Error initializing TLS context");
return -1;
}
/* 4. Build our router descriptor. */
/* Must be called after keys are initialized. */
mydesc = router_get_my_descriptor();
- if (authdir_mode(options)) {
+ if (authdir_mode_handles_descs(options, ROUTER_PURPOSE_GENERAL)) {
const char *m = NULL;
routerinfo_t *ri;
/* We need to add our own fingerprint so it gets recognized. */
- if (dirserv_add_own_fingerprint(options->Nickname, get_identity_key())) {
+ if (dirserv_add_own_fingerprint(options->Nickname,
+ get_server_identity_key())) {
log_err(LD_GENERAL,"Error adding own fingerprint to approved set");
return -1;
}
@@ -568,7 +655,8 @@ init_keys(void)
/* 5. Dump fingerprint to 'fingerprint' */
keydir = get_datadir_fname("fingerprint");
log_info(LD_GENERAL,"Dumping fingerprint to \"%s\"...",keydir);
- if (crypto_pk_get_fingerprint(get_identity_key(), fingerprint, 0)<0) {
+ if (crypto_pk_get_fingerprint(get_server_identity_key(),
+ fingerprint, 0) < 0) {
log_err(LD_GENERAL,"Error computing fingerprint");
tor_free(keydir);
return -1;
@@ -606,7 +694,7 @@ init_keys(void)
return -1;
}
/* 6b. [authdirserver only] add own key to approved directories. */
- crypto_pk_get_digest(get_identity_key(), digest);
+ crypto_pk_get_digest(get_server_identity_key(), digest);
type = ((options->V1AuthoritativeDir ? V1_AUTHORITY : NO_AUTHORITY) |
(options->V2AuthoritativeDir ? V2_AUTHORITY : NO_AUTHORITY) |
(options->V3AuthoritativeDir ? V3_AUTHORITY : NO_AUTHORITY) |
@@ -952,6 +1040,28 @@ server_mode(or_options_t *options)
return (options->ORPort != 0 || options->ORListenAddress);
}
+/** Return true iff we are trying to be a non-bridge server.
+ */
+int
+public_server_mode(or_options_t *options)
+{
+ if (!server_mode(options)) return 0;
+ return (!options->BridgeRelay);
+}
+
+/** Return true iff the combination of options in <b>options</b> and parameters
+ * in the consensus mean that we don't want to allow exits from circuits
+ * we got from addresses not known to be servers. */
+int
+should_refuse_unknown_exits(or_options_t *options)
+{
+ if (options->RefuseUnknownExits_ != -1) {
+ return options->RefuseUnknownExits_;
+ } else {
+ return networkstatus_get_param(NULL, "refuseunknownexits", 1, 0, 1);
+ }
+}
+
/** Remember if we've advertised ourselves to the dirservers. */
static int server_is_advertised=0;
@@ -979,7 +1089,7 @@ proxy_mode(or_options_t *options)
{
return (options->SocksPort != 0 || options->SocksListenAddress ||
options->TransPort != 0 || options->TransListenAddress ||
- options->NatdPort != 0 || options->NatdListenAddress ||
+ options->NATDPort != 0 || options->NATDListenAddress ||
options->DNSPort != 0 || options->DNSListenAddress);
}
@@ -1114,12 +1224,24 @@ router_compare_to_my_exit_policy(edge_connection_t *conn)
desc_routerinfo->exit_policy) != ADDR_POLICY_ACCEPTED;
}
+/** Return true iff my exit policy is reject *:*. Return -1 if we don't
+ * have a descriptor */
+int
+router_my_exit_policy_is_reject_star(void)
+{
+ if (!router_get_my_routerinfo()) /* make sure desc_routerinfo exists */
+ return -1;
+
+ return desc_routerinfo->policy_is_reject_star;
+}
+
/** Return true iff I'm a server and <b>digest</b> is equal to
- * my identity digest. */
+ * my server identity key digest. */
int
router_digest_is_me(const char *digest)
{
- return identitykey && !memcmp(identitykey_digest, digest, DIGEST_LEN);
+ return (server_identitykey &&
+ !memcmp(server_identitykey_digest, digest, DIGEST_LEN));
}
/** Return true iff I'm a server and <b>digest</b> is equal to
@@ -1209,6 +1331,8 @@ static int router_guess_address_from_dir_headers(uint32_t *guess);
int
router_pick_published_address(or_options_t *options, uint32_t *addr)
{
+ char buf[INET_NTOA_BUF_LEN];
+ struct in_addr a;
if (resolve_my_address(LOG_INFO, options, addr, NULL) < 0) {
log_info(LD_CONFIG, "Could not determine our address locally. "
"Checking if directory headers provide any hints.");
@@ -1218,6 +1342,9 @@ router_pick_published_address(or_options_t *options, uint32_t *addr)
return -1;
}
}
+ a.s_addr = htonl(*addr);
+ tor_inet_ntoa(&a, buf, sizeof(buf));
+ log_info(LD_CONFIG,"Success: chose address '%s'.", buf);
return 0;
}
@@ -1240,7 +1367,7 @@ router_rebuild_descriptor(int force)
if (router_pick_published_address(options, &addr) < 0) {
/* Stop trying to rebuild our descriptor every second. We'll
- * learn that it's time to try again when server_has_changed_ip()
+ * learn that it's time to try again when ip_address_changed()
* marks it dirty. */
desc_clean_since = time(NULL);
return -1;
@@ -1256,7 +1383,7 @@ router_rebuild_descriptor(int force)
ri->cache_info.published_on = time(NULL);
ri->onion_pkey = crypto_pk_dup_key(get_onion_key()); /* must invoke from
* main thread */
- ri->identity_pkey = crypto_pk_dup_key(get_identity_key());
+ ri->identity_pkey = crypto_pk_dup_key(get_server_identity_key());
if (crypto_pk_get_digest(ri->identity_pkey,
ri->cache_info.identity_digest)<0) {
routerinfo_free(ri);
@@ -1273,9 +1400,16 @@ router_rebuild_descriptor(int force)
ri->bandwidthcapacity = hibernating ? 0 : rep_hist_bandwidth_assess();
- policies_parse_exit_policy(options->ExitPolicy, &ri->exit_policy,
- options->ExitPolicyRejectPrivate,
- ri->address);
+ if (dns_seems_to_be_broken() || has_dns_init_failed()) {
+ /* DNS is screwed up; don't claim to be an exit. */
+ policies_exit_policy_append_reject_star(&ri->exit_policy);
+ } else {
+ policies_parse_exit_policy(options->ExitPolicy, &ri->exit_policy,
+ options->ExitPolicyRejectPrivate,
+ ri->address, !options->BridgeRelay);
+ }
+ ri->policy_is_reject_star =
+ policy_is_reject_star(ri->exit_policy);
if (desc_routerinfo) { /* inherit values */
ri->is_valid = desc_routerinfo->is_valid;
@@ -1346,26 +1480,30 @@ router_rebuild_descriptor(int force)
ei->cache_info.published_on = ri->cache_info.published_on;
memcpy(ei->cache_info.identity_digest, ri->cache_info.identity_digest,
DIGEST_LEN);
- ei->cache_info.signed_descriptor_body = tor_malloc(8192);
- if (extrainfo_dump_to_string(ei->cache_info.signed_descriptor_body, 8192,
- ei, get_identity_key()) < 0) {
+ if (extrainfo_dump_to_string(&ei->cache_info.signed_descriptor_body,
+ ei, get_server_identity_key()) < 0) {
log_warn(LD_BUG, "Couldn't generate extra-info descriptor.");
- routerinfo_free(ri);
extrainfo_free(ei);
- return -1;
+ ei = NULL;
+ } else {
+ ei->cache_info.signed_descriptor_len =
+ strlen(ei->cache_info.signed_descriptor_body);
+ router_get_extrainfo_hash(ei->cache_info.signed_descriptor_body,
+ ei->cache_info.signed_descriptor_digest);
}
- ei->cache_info.signed_descriptor_len =
- strlen(ei->cache_info.signed_descriptor_body);
- router_get_extrainfo_hash(ei->cache_info.signed_descriptor_body,
- ei->cache_info.signed_descriptor_digest);
/* Now finish the router descriptor. */
- memcpy(ri->cache_info.extra_info_digest,
- ei->cache_info.signed_descriptor_digest,
- DIGEST_LEN);
+ if (ei) {
+ memcpy(ri->cache_info.extra_info_digest,
+ ei->cache_info.signed_descriptor_digest,
+ DIGEST_LEN);
+ } else {
+ /* ri was allocated with tor_malloc_zero, so there is no need to
+ * zero ri->cache_info.extra_info_digest here. */
+ }
ri->cache_info.signed_descriptor_body = tor_malloc(8192);
if (router_dump_router_to_string(ri->cache_info.signed_descriptor_body, 8192,
- ri, get_identity_key())<0) {
+ ri, get_server_identity_key()) < 0) {
log_warn(LD_BUG, "Couldn't generate router descriptor.");
routerinfo_free(ri);
extrainfo_free(ei);
@@ -1380,7 +1518,7 @@ router_rebuild_descriptor(int force)
/* Let bridges serve their own descriptors unencrypted, so they can
* pass reachability testing. (If they want to be harder to notice,
* they can always leave the DirPort off). */
- if (!options->BridgeRelay)
+ if (ei && !options->BridgeRelay)
ei->cache_info.send_unencrypted = 1;
router_get_router_hash(ri->cache_info.signed_descriptor_body,
@@ -1389,13 +1527,13 @@ router_rebuild_descriptor(int force)
routerinfo_set_country(ri);
- tor_assert(! routerinfo_incompatible_with_extrainfo(ri, ei, NULL, NULL));
+ if (ei) {
+ tor_assert(! routerinfo_incompatible_with_extrainfo(ri, ei, NULL, NULL));
+ }
- if (desc_routerinfo)
- routerinfo_free(desc_routerinfo);
+ routerinfo_free(desc_routerinfo);
desc_routerinfo = ri;
- if (desc_extrainfo)
- extrainfo_free(desc_extrainfo);
+ extrainfo_free(desc_extrainfo);
desc_extrainfo = ei;
desc_clean_since = time(NULL);
@@ -1576,8 +1714,6 @@ router_guess_address_from_dir_headers(uint32_t *guess)
return -1;
}
-extern const char tor_svn_revision[]; /* from tor_main.c */
-
/** Set <b>platform</b> (max length <b>len</b>) to a NUL-terminated short
* string describing the version of Tor and the operating system we're
* currently running on.
@@ -1608,6 +1744,7 @@ router_dump_router_to_string(char *s, size_t maxlen, routerinfo_t *router,
char digest[DIGEST_LEN];
char published[ISO_TIME_LEN+1];
char fingerprint[FINGERPRINT_LEN+1];
+ int has_extra_info_digest;
char extra_info_digest[HEX_DIGEST_LEN+1];
size_t onion_pkeylen, identity_pkeylen;
size_t written;
@@ -1636,7 +1773,7 @@ router_dump_router_to_string(char *s, size_t maxlen, routerinfo_t *router,
return -1;
}
- /* PEM-encode the identity key key */
+ /* PEM-encode the identity key */
if (crypto_pk_write_public_key_to_string(router->identity_pkey,
&identity_pkey,&identity_pkeylen)<0) {
log_warn(LD_BUG,"write identity_pkey to string failed!");
@@ -1658,8 +1795,13 @@ router_dump_router_to_string(char *s, size_t maxlen, routerinfo_t *router,
family_line = tor_strdup("");
}
- base16_encode(extra_info_digest, sizeof(extra_info_digest),
- router->cache_info.extra_info_digest, DIGEST_LEN);
+ has_extra_info_digest =
+ ! tor_digest_is_zero(router->cache_info.extra_info_digest);
+
+ if (has_extra_info_digest) {
+ base16_encode(extra_info_digest, sizeof(extra_info_digest),
+ router->cache_info.extra_info_digest, DIGEST_LEN);
+ }
/* Generate the easy portion of the router descriptor. */
result = tor_snprintf(s, maxlen,
@@ -1670,7 +1812,7 @@ router_dump_router_to_string(char *s, size_t maxlen, routerinfo_t *router,
"opt fingerprint %s\n"
"uptime %ld\n"
"bandwidth %d %d %d\n"
- "opt extra-info-digest %s\n%s"
+ "%s%s%s%s"
"onion-key\n%s"
"signing-key\n%s"
"%s%s%s%s",
@@ -1685,7 +1827,9 @@ router_dump_router_to_string(char *s, size_t maxlen, routerinfo_t *router,
(int) router->bandwidthrate,
(int) router->bandwidthburst,
(int) router->bandwidthcapacity,
- extra_info_digest,
+ has_extra_info_digest ? "opt extra-info-digest " : "",
+ has_extra_info_digest ? extra_info_digest : "",
+ has_extra_info_digest ? "\n" : "",
options->DownloadExtraInfo ? "opt caches-extra-info\n" : "",
onion_pkey, identity_pkey,
family_line,
@@ -1717,9 +1861,7 @@ router_dump_router_to_string(char *s, size_t maxlen, routerinfo_t *router,
}
/* Write the exit policy to the end of 's'. */
- if (dns_seems_to_be_broken() || has_dns_init_failed() ||
- !router->exit_policy || !smartlist_len(router->exit_policy)) {
- /* DNS is screwed up; don't claim to be an exit. */
+ if (!router->exit_policy || !smartlist_len(router->exit_policy)) {
strlcat(s+written, "reject *:*\n", maxlen-written);
written += strlen("reject *:*\n");
tmpe = NULL;
@@ -1742,7 +1884,8 @@ router_dump_router_to_string(char *s, size_t maxlen, routerinfo_t *router,
}
}
- if (written+256 > maxlen) { /* Not enough room for signature. */
+ if (written + DIROBJ_MAX_SIG_LEN > maxlen) {
+ /* Not enough room for signature. */
log_warn(LD_BUG,"not enough room left in descriptor for signature!");
return -1;
}
@@ -1757,7 +1900,7 @@ router_dump_router_to_string(char *s, size_t maxlen, routerinfo_t *router,
note_crypto_pk_op(SIGN_RTR);
if (router_append_dirobj_signature(s+written,maxlen-written,
- digest,ident_key)<0) {
+ digest,DIGEST_LEN,ident_key)<0) {
log_warn(LD_BUG, "Couldn't sign router descriptor");
return -1;
}
@@ -1792,11 +1935,62 @@ router_dump_router_to_string(char *s, size_t maxlen, routerinfo_t *router,
return (int)written+1;
}
-/** Write the contents of <b>extrainfo</b> to the <b>maxlen</b>-byte string
- * <b>s</b>, signing them with <b>ident_key</b>. Return 0 on success,
- * negative on failure. */
+/** Load the contents of <b>filename</b>, find the last line starting with
+ * <b>end_line</b>, ensure that its timestamp is not more than 25 hours in
+ * the past or more than 1 hour in the future with respect to <b>now</b>,
+ * and write the file contents starting with that line to *<b>out</b>.
+ * Return 1 for success, 0 if the file does not exist, or -1 if the file
+ * does not contain a line matching these criteria or other failure. */
+static int
+load_stats_file(const char *filename, const char *end_line, time_t now,
+ char **out)
+{
+ int r = -1;
+ char *fname = get_datadir_fname(filename);
+ char *contents, *start = NULL, *tmp, timestr[ISO_TIME_LEN+1];
+ time_t written;
+ switch (file_status(fname)) {
+ case FN_FILE:
+ /* X022 Find an alternative to reading the whole file to memory. */
+ if ((contents = read_file_to_str(fname, 0, NULL))) {
+ tmp = strstr(contents, end_line);
+ /* Find last block starting with end_line */
+ while (tmp) {
+ start = tmp;
+ tmp = strstr(tmp + 1, end_line);
+ }
+ if (!start)
+ goto notfound;
+ if (strlen(start) < strlen(end_line) + 1 + sizeof(timestr))
+ goto notfound;
+ strlcpy(timestr, start + 1 + strlen(end_line), sizeof(timestr));
+ if (parse_iso_time(timestr, &written) < 0)
+ goto notfound;
+ if (written < now - (25*60*60) || written > now + (1*60*60))
+ goto notfound;
+ *out = tor_strdup(start);
+ r = 1;
+ }
+ notfound:
+ tor_free(contents);
+ break;
+ case FN_NOENT:
+ r = 0;
+ break;
+ case FN_ERROR:
+ case FN_DIR:
+ default:
+ break;
+ }
+ tor_free(fname);
+ return r;
+}
+
+/** Write the contents of <b>extrainfo</b> and aggregated statistics to
+ * *<b>s_out</b>, signing them with <b>ident_key</b>. Return 0 on
+ * success, negative on failure. */
int
-extrainfo_dump_to_string(char *s, size_t maxlen, extrainfo_t *extrainfo,
+extrainfo_dump_to_string(char **s_out, extrainfo_t *extrainfo,
crypto_pk_env_t *ident_key)
{
or_options_t *options = get_options();
@@ -1805,87 +1999,128 @@ extrainfo_dump_to_string(char *s, size_t maxlen, extrainfo_t *extrainfo,
char digest[DIGEST_LEN];
char *bandwidth_usage;
int result;
- size_t len;
+ static int write_stats_to_extrainfo = 1;
+ char sig[DIROBJ_MAX_SIG_LEN+1];
+ char *s, *pre, *contents, *cp, *s_dup = NULL;
+ time_t now = time(NULL);
+ smartlist_t *chunks = smartlist_create();
+ extrainfo_t *ei_tmp = NULL;
base16_encode(identity, sizeof(identity),
extrainfo->cache_info.identity_digest, DIGEST_LEN);
format_iso_time(published, extrainfo->cache_info.published_on);
- bandwidth_usage = rep_hist_get_bandwidth_lines(1);
+ bandwidth_usage = rep_hist_get_bandwidth_lines();
- result = tor_snprintf(s, maxlen,
- "extra-info %s %s\n"
- "published %s\n%s",
- extrainfo->nickname, identity,
- published, bandwidth_usage);
+ tor_asprintf(&pre, "extra-info %s %s\npublished %s\n%s",
+ extrainfo->nickname, identity,
+ published, bandwidth_usage);
tor_free(bandwidth_usage);
- if (result<0)
- return -1;
+ smartlist_add(chunks, pre);
+
+ if (options->ExtraInfoStatistics && write_stats_to_extrainfo) {
+ log_info(LD_GENERAL, "Adding stats to extra-info descriptor.");
+ if (options->DirReqStatistics &&
+ load_stats_file("stats"PATH_SEPARATOR"dirreq-stats",
+ "dirreq-stats-end", now, &contents) > 0) {
+ smartlist_add(chunks, contents);
+ }
+ if (options->EntryStatistics &&
+ load_stats_file("stats"PATH_SEPARATOR"entry-stats",
+ "entry-stats-end", now, &contents) > 0) {
+ smartlist_add(chunks, contents);
+ }
+ if (options->CellStatistics &&
+ load_stats_file("stats"PATH_SEPARATOR"buffer-stats",
+ "cell-stats-end", now, &contents) > 0) {
+ smartlist_add(chunks, contents);
+ }
+ if (options->ExitPortStatistics &&
+ load_stats_file("stats"PATH_SEPARATOR"exit-stats",
+ "exit-stats-end", now, &contents) > 0) {
+ smartlist_add(chunks, contents);
+ }
+ }
- if (should_record_bridge_info(options)) {
- char *geoip_summary = extrainfo_get_client_geoip_summary(time(NULL));
- if (geoip_summary) {
- char geoip_start[ISO_TIME_LEN+1];
- format_iso_time(geoip_start, geoip_get_history_start());
- result = tor_snprintf(s+strlen(s), maxlen-strlen(s),
- "geoip-start-time %s\n"
- "geoip-client-origins %s\n",
- geoip_start, geoip_summary);
- control_event_clients_seen(geoip_start, geoip_summary);
- tor_free(geoip_summary);
- if (result<0)
- return -1;
+ if (should_record_bridge_info(options) && write_stats_to_extrainfo) {
+ const char *bridge_stats = geoip_get_bridge_stats_extrainfo(now);
+ if (bridge_stats) {
+ smartlist_add(chunks, tor_strdup(bridge_stats));
}
}
- len = strlen(s);
- strlcat(s+len, "router-signature\n", maxlen-len);
- len += strlen(s+len);
- if (router_get_extrainfo_hash(s, digest)<0)
- return -1;
- if (router_append_dirobj_signature(s+len, maxlen-len, digest, ident_key)<0)
- return -1;
+ smartlist_add(chunks, tor_strdup("router-signature\n"));
+ s = smartlist_join_strings(chunks, "", 0, NULL);
+
+ while (strlen(s) > MAX_EXTRAINFO_UPLOAD_SIZE - DIROBJ_MAX_SIG_LEN) {
+ /* So long as there are at least two chunks (one for the initial
+ * extra-info line and one for the router-signature), we can keep removing
+ * things. */
+ if (smartlist_len(chunks) > 2) {
+ /* We remove the next-to-last element (remember, len-1 is the last
+ element), since we need to keep the router-signature element. */
+ int idx = smartlist_len(chunks) - 2;
+ char *e = smartlist_get(chunks, idx);
+ smartlist_del_keeporder(chunks, idx);
+ log_warn(LD_GENERAL, "We just generated an extra-info descriptor "
+ "with statistics that exceeds the 50 KB "
+ "upload limit. Removing last added "
+ "statistics.");
+ tor_free(e);
+ tor_free(s);
+ s = smartlist_join_strings(chunks, "", 0, NULL);
+ } else {
+ log_warn(LD_BUG, "We just generated an extra-info descriptors that "
+ "exceeds the 50 KB upload limit.");
+ goto err;
+ }
+ }
-#ifdef DEBUG_ROUTER_DUMP_ROUTER_TO_STRING
- {
- char *cp, *s_dup;
- extrainfo_t *ei_tmp;
- cp = s_dup = tor_strdup(s);
- ei_tmp = extrainfo_parse_entry_from_string(cp, NULL, 1, NULL);
- if (!ei_tmp) {
- log_err(LD_BUG,
- "We just generated an extrainfo descriptor we can't parse.");
- log_err(LD_BUG, "Descriptor was: <<%s>>", s);
- tor_free(s_dup);
- return -1;
+ memset(sig, 0, sizeof(sig));
+ if (router_get_extrainfo_hash(s, digest) < 0 ||
+ router_append_dirobj_signature(sig, sizeof(sig), digest, DIGEST_LEN,
+ ident_key) < 0) {
+ log_warn(LD_BUG, "Could not append signature to extra-info "
+ "descriptor.");
+ goto err;
+ }
+ smartlist_add(chunks, tor_strdup(sig));
+ tor_free(s);
+ s = smartlist_join_strings(chunks, "", 0, NULL);
+
+ cp = s_dup = tor_strdup(s);
+ ei_tmp = extrainfo_parse_entry_from_string(cp, NULL, 1, NULL);
+ if (!ei_tmp) {
+ if (write_stats_to_extrainfo) {
+ log_warn(LD_GENERAL, "We just generated an extra-info descriptor "
+ "with statistics that we can't parse. Not "
+ "adding statistics to this or any future "
+ "extra-info descriptors.");
+ write_stats_to_extrainfo = 0;
+ result = extrainfo_dump_to_string(s_out, extrainfo, ident_key);
+ goto done;
+ } else {
+ log_warn(LD_BUG, "We just generated an extrainfo descriptor we "
+ "can't parse.");
+ goto err;
}
- tor_free(s_dup);
- extrainfo_free(ei_tmp);
}
-#endif
- return (int)strlen(s)+1;
-}
+ *s_out = s;
+ s = NULL; /* prevent free */
+ result = 0;
+ goto done;
-/** Wrapper function for geoip_get_client_history(). It first discards
- * any items in the client history that are too old -- it dumps anything
- * more than 48 hours old, but it only considers whether to dump at most
- * once per 48 hours, so we aren't too precise to an observer (see also
- * r14780).
- */
-char *
-extrainfo_get_client_geoip_summary(time_t now)
-{
- static time_t last_purged_at = 0;
- int geoip_purge_interval = 48*60*60;
-#ifdef ENABLE_GEOIP_STATS
- if (get_options()->DirRecordUsageByCountry)
- geoip_purge_interval = get_options()->DirRecordUsageRetainIPs;
-#endif
- if (now > last_purged_at+geoip_purge_interval) {
- geoip_remove_old_clients(now-geoip_purge_interval);
- last_purged_at = now;
- }
- return geoip_get_client_history(now, GEOIP_CLIENT_CONNECT);
+ err:
+ result = -1;
+
+ done:
+ tor_free(s);
+ SMARTLIST_FOREACH(chunks, char *, cp, tor_free(cp));
+ smartlist_free(chunks);
+ tor_free(s_dup);
+ extrainfo_free(ei_tmp);
+
+ return result;
}
/** Return true iff <b>s</b> is a legally valid server nickname. */
@@ -2012,26 +2247,17 @@ router_purpose_from_string(const char *s)
void
router_free_all(void)
{
- if (onionkey)
- crypto_free_pk_env(onionkey);
- if (lastonionkey)
- crypto_free_pk_env(lastonionkey);
- if (identitykey)
- crypto_free_pk_env(identitykey);
- if (key_lock)
- tor_mutex_free(key_lock);
- if (desc_routerinfo)
- routerinfo_free(desc_routerinfo);
- if (desc_extrainfo)
- extrainfo_free(desc_extrainfo);
- if (authority_signing_key)
- crypto_free_pk_env(authority_signing_key);
- if (authority_key_certificate)
- authority_cert_free(authority_key_certificate);
- if (legacy_signing_key)
- crypto_free_pk_env(legacy_signing_key);
- if (legacy_key_certificate)
- authority_cert_free(legacy_key_certificate);
+ crypto_free_pk_env(onionkey);
+ crypto_free_pk_env(lastonionkey);
+ crypto_free_pk_env(server_identitykey);
+ crypto_free_pk_env(client_identitykey);
+ tor_mutex_free(key_lock);
+ routerinfo_free(desc_routerinfo);
+ extrainfo_free(desc_extrainfo);
+ crypto_free_pk_env(authority_signing_key);
+ authority_cert_free(authority_key_certificate);
+ crypto_free_pk_env(legacy_signing_key);
+ authority_cert_free(legacy_key_certificate);
if (warned_nonexistent_family) {
SMARTLIST_FOREACH(warned_nonexistent_family, char *, cp, tor_free(cp));
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