summaryrefslogtreecommitdiff
path: root/src/feature/relay
diff options
context:
space:
mode:
Diffstat (limited to 'src/feature/relay')
-rw-r--r--src/feature/relay/relay_config.c222
-rw-r--r--src/feature/relay/relay_config.h25
2 files changed, 247 insertions, 0 deletions
diff --git a/src/feature/relay/relay_config.c b/src/feature/relay/relay_config.c
new file mode 100644
index 0000000000..6ec802fc5a
--- /dev/null
+++ b/src/feature/relay/relay_config.c
@@ -0,0 +1,222 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2019, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * @file relay_config.c
+ * @brief Code to interpret the user's configuration of Tor's relay module.
+ **/
+
+#include "orconfig.h"
+#include "feature/relay/relay_config.h"
+
+#include "lib/encoding/confline.h"
+#include "lib/confmgt/confmgt.h"
+
+#include "lib/container/smartlist.h"
+#include "lib/process/setuid.h"
+
+/* Required for dirinfo_type_t in or_options_t */
+#include "core/or/or.h"
+#include "app/config/config.h"
+
+#include "core/mainloop/connection.h"
+#include "core/or/port_cfg_st.h"
+
+#include "feature/relay/dns.h"
+#include "feature/relay/ext_orport.h"
+#include "feature/relay/routermode.h"
+
+/** Given a list of <b>port_cfg_t</b> in <b>ports</b>, check them for internal
+ * consistency and warn as appropriate. On Unix-based OSes, set
+ * *<b>n_low_ports_out</b> to the number of sub-1024 ports we will be
+ * binding, and warn if we may be unable to re-bind after hibernation. */
+static int
+check_server_ports(const smartlist_t *ports,
+ const or_options_t *options,
+ int *n_low_ports_out)
+{
+ if (BUG(!ports))
+ return -1;
+
+ if (BUG(!options))
+ return -1;
+
+ if (BUG(!n_low_ports_out))
+ return -1;
+
+ int n_orport_advertised = 0;
+ int n_orport_advertised_ipv4 = 0;
+ int n_orport_listeners = 0;
+ int n_dirport_advertised = 0;
+ int n_dirport_listeners = 0;
+ int n_low_port = 0;
+ int r = 0;
+
+ SMARTLIST_FOREACH_BEGIN(ports, const port_cfg_t *, port) {
+ if (port->type == CONN_TYPE_DIR_LISTENER) {
+ if (! port->server_cfg.no_advertise)
+ ++n_dirport_advertised;
+ if (! port->server_cfg.no_listen)
+ ++n_dirport_listeners;
+ } else if (port->type == CONN_TYPE_OR_LISTENER) {
+ if (! port->server_cfg.no_advertise) {
+ ++n_orport_advertised;
+ if (port_binds_ipv4(port))
+ ++n_orport_advertised_ipv4;
+ }
+ if (! port->server_cfg.no_listen)
+ ++n_orport_listeners;
+ } else {
+ continue;
+ }
+#ifndef _WIN32
+ if (!port->server_cfg.no_listen && port->port < 1024)
+ ++n_low_port;
+#endif
+ } SMARTLIST_FOREACH_END(port);
+
+ if (n_orport_advertised && !n_orport_listeners) {
+ log_warn(LD_CONFIG, "We are advertising an ORPort, but not actually "
+ "listening on one.");
+ r = -1;
+ }
+ if (n_orport_listeners && !n_orport_advertised) {
+ log_warn(LD_CONFIG, "We are listening on an ORPort, but not advertising "
+ "any ORPorts. This will keep us from building a %s "
+ "descriptor, and make us impossible to use.",
+ options->BridgeRelay ? "bridge" : "router");
+ r = -1;
+ }
+ if (n_dirport_advertised && !n_dirport_listeners) {
+ log_warn(LD_CONFIG, "We are advertising a DirPort, but not actually "
+ "listening on one.");
+ r = -1;
+ }
+ if (n_dirport_advertised > 1) {
+ log_warn(LD_CONFIG, "Can't advertise more than one DirPort.");
+ r = -1;
+ }
+ if (n_orport_advertised && !n_orport_advertised_ipv4 &&
+ !options->BridgeRelay) {
+ log_warn(LD_CONFIG, "Configured public relay to listen only on an IPv6 "
+ "address. Tor needs to listen on an IPv4 address too.");
+ r = -1;
+ }
+
+ if (n_low_port && options->AccountingMax &&
+ (!have_capability_support() || options->KeepBindCapabilities == 0)) {
+ const char *extra = "";
+ if (options->KeepBindCapabilities == 0 && have_capability_support())
+ extra = ", and you have disabled KeepBindCapabilities.";
+ log_warn(LD_CONFIG,
+ "You have set AccountingMax to use hibernation. You have also "
+ "chosen a low DirPort or OrPort%s."
+ "This combination can make Tor stop "
+ "working when it tries to re-attach the port after a period of "
+ "hibernation. Please choose a different port or turn off "
+ "hibernation unless you know this combination will work on your "
+ "platform.", extra);
+ }
+
+ if (n_low_ports_out)
+ *n_low_ports_out = n_low_port;
+
+ return r;
+}
+
+/** Parse all relay ports from <b>options</b>. On success, add parsed ports to
+ * <b>ports</b>, and return 0. On failure, set *<b>msg</b> to a description
+ * of the problem and return -1.
+ **/
+int
+parse_ports_relay(or_options_t *options,
+ char **msg,
+ smartlist_t *ports_out,
+ int *have_low_ports_out)
+{
+ int retval = -1;
+ smartlist_t *ports = smartlist_new();
+
+ if (BUG(!options))
+ goto err;
+
+ if (BUG(!msg))
+ goto err;
+
+ if (BUG(!ports_out))
+ goto err;
+
+ if (BUG(!have_low_ports_out))
+ goto err;
+
+ if (! options->ClientOnly) {
+ if (parse_port_config(ports,
+ options->ORPort_lines,
+ "OR", CONN_TYPE_OR_LISTENER,
+ "0.0.0.0", 0,
+ CL_PORT_SERVER_OPTIONS) < 0) {
+ *msg = tor_strdup("Invalid ORPort configuration");
+ goto err;
+ }
+ if (parse_port_config(ports,
+ options->ExtORPort_lines,
+ "ExtOR", CONN_TYPE_EXT_OR_LISTENER,
+ "127.0.0.1", 0,
+ CL_PORT_SERVER_OPTIONS|CL_PORT_WARN_NONLOCAL) < 0) {
+ *msg = tor_strdup("Invalid ExtORPort configuration");
+ goto err;
+ }
+ if (parse_port_config(ports,
+ options->DirPort_lines,
+ "Dir", CONN_TYPE_DIR_LISTENER,
+ "0.0.0.0", 0,
+ CL_PORT_SERVER_OPTIONS) < 0) {
+ *msg = tor_strdup("Invalid DirPort configuration");
+ goto err;
+ }
+ }
+
+ int n_low_ports = 0;
+ if (check_server_ports(ports, options, &n_low_ports) < 0) {
+ *msg = tor_strdup("Misconfigured server ports");
+ goto err;
+ }
+ if (*have_low_ports_out < 0)
+ *have_low_ports_out = (n_low_ports > 0);
+
+ smartlist_add_all(ports_out, ports);
+ smartlist_free(ports);
+ ports = NULL;
+ retval = 0;
+
+ err:
+ if (ports) {
+ SMARTLIST_FOREACH(ports, port_cfg_t *, p, port_cfg_free(p));
+ smartlist_free(ports);
+ }
+ return retval;
+}
+
+/** Update the relay *Port_set values in <b>options</b> from <b>ports</b>. */
+void
+update_port_set_relay(or_options_t *options,
+ const smartlist_t *ports)
+{
+ if (BUG(!options))
+ return;
+
+ if (BUG(!ports))
+ return;
+
+ /* Update the relay *Port_set options. The !! here is to force a boolean
+ * out of an integer. */
+ options->ORPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_OR_LISTENER, 0);
+ options->DirPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_DIR_LISTENER, 0);
+ options->ExtORPort_set =
+ !! count_real_listeners(ports, CONN_TYPE_EXT_OR_LISTENER, 0);
+}
diff --git a/src/feature/relay/relay_config.h b/src/feature/relay/relay_config.h
new file mode 100644
index 0000000000..1b46e825ad
--- /dev/null
+++ b/src/feature/relay/relay_config.h
@@ -0,0 +1,25 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2019, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * @file relay_config.h
+ * @brief Header for feature/relay/relay_config.c
+ **/
+
+#ifndef TOR_FEATURE_RELAY_RELAY_CONFIG_H
+#define TOR_FEATURE_RELAY_RELAY_CONFIG_H
+
+typedef struct or_options_t or_options_t;
+typedef struct smartlist_t smartlist_t;
+
+int parse_ports_relay(or_options_t *options,
+ char **msg,
+ smartlist_t *ports_out,
+ int *have_low_ports_out);
+void update_port_set_relay(or_options_t *options,
+ const smartlist_t *ports);
+
+#endif /* !defined(TOR_FEATURE_RELAY_RELAY_CONFIG_H) */
7apu2bq3rhoylwmucxizk54afw5jyda7pho4j5zdcqpwkufke7zdzwad.onion