mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-24 04:13:28 +01:00
Split bridge functions into a new module.
This patch is just: * Code movement * Adding headers here and there as needed * Adding a bridges_free_all() with a call to it. It breaks compilation, since the bridge code needed to make exactly 2 calls into entrynodes.c internals. I'll fix those in the next commit.
This commit is contained in:
parent
dd6def5daf
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src/or/bridges.c
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809
src/or/bridges.c
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/* Copyright (c) 2001 Matej Pfajfar.
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* Copyright (c) 2001-2004, Roger Dingledine.
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2016, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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/**
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* \file bridges.c
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* \brief Code to manage bridges and bridge selection.
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*
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* Bridges are fixed entry nodes, used for censorship circumvention.
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**/
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#include "or.h"
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#include "bridges.h"
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#include "circuitbuild.h"
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#include "config.h"
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#include "connection.h"
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#include "directory.h"
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#include "entrynodes.h"
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#include "nodelist.h"
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#include "policies.h"
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#include "router.h"
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#include "routerlist.h"
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#include "routerset.h"
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#include "transports.h"
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/** Information about a configured bridge. Currently this just matches the
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* ones in the torrc file, but one day we may be able to learn about new
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* bridges on our own, and remember them in the state file. */
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typedef struct {
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/** Address of the bridge. */
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tor_addr_t addr;
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/** TLS port for the bridge. */
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uint16_t port;
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/** Boolean: We are re-parsing our bridge list, and we are going to remove
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* this one if we don't find it in the list of configured bridges. */
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unsigned marked_for_removal : 1;
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/** Expected identity digest, or all zero bytes if we don't know what the
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* digest should be. */
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char identity[DIGEST_LEN];
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/** Name of pluggable transport protocol taken from its config line. */
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char *transport_name;
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/** When should we next try to fetch a descriptor for this bridge? */
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download_status_t fetch_status;
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/** A smartlist of k=v values to be passed to the SOCKS proxy, if
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transports are used for this bridge. */
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smartlist_t *socks_args;
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} bridge_info_t;
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static void bridge_free(bridge_info_t *bridge);
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static int num_bridges_usable(void);
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/** A list of configured bridges. Whenever we actually get a descriptor
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* for one, we add it as an entry guard. Note that the order of bridges
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* in this list does not necessarily correspond to the order of bridges
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* in the torrc. */
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static smartlist_t *bridge_list = NULL;
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/** Mark every entry of the bridge list to be removed on our next call to
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* sweep_bridge_list unless it has first been un-marked. */
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void
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mark_bridge_list(void)
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{
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if (!bridge_list)
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bridge_list = smartlist_new();
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SMARTLIST_FOREACH(bridge_list, bridge_info_t *, b,
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b->marked_for_removal = 1);
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}
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/** Remove every entry of the bridge list that was marked with
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* mark_bridge_list if it has not subsequently been un-marked. */
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void
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sweep_bridge_list(void)
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{
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if (!bridge_list)
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bridge_list = smartlist_new();
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SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, b) {
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if (b->marked_for_removal) {
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SMARTLIST_DEL_CURRENT(bridge_list, b);
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bridge_free(b);
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}
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} SMARTLIST_FOREACH_END(b);
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}
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/** Initialize the bridge list to empty, creating it if needed. */
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static void
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clear_bridge_list(void)
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{
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if (!bridge_list)
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bridge_list = smartlist_new();
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SMARTLIST_FOREACH(bridge_list, bridge_info_t *, b, bridge_free(b));
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smartlist_clear(bridge_list);
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}
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/** Free the bridge <b>bridge</b>. */
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static void
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bridge_free(bridge_info_t *bridge)
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{
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if (!bridge)
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return;
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tor_free(bridge->transport_name);
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if (bridge->socks_args) {
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SMARTLIST_FOREACH(bridge->socks_args, char*, s, tor_free(s));
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smartlist_free(bridge->socks_args);
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}
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tor_free(bridge);
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}
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/** If we have a bridge configured whose digest matches <b>digest</b>, or a
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* bridge with no known digest whose address matches any of the
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* tor_addr_port_t's in <b>orports</b>, return that bridge. Else return
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* NULL. */
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static bridge_info_t *
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get_configured_bridge_by_orports_digest(const char *digest,
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const smartlist_t *orports)
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{
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if (!bridge_list)
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return NULL;
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SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, bridge)
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{
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if (tor_digest_is_zero(bridge->identity)) {
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SMARTLIST_FOREACH_BEGIN(orports, tor_addr_port_t *, ap)
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{
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if (tor_addr_compare(&bridge->addr, &ap->addr, CMP_EXACT) == 0 &&
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bridge->port == ap->port)
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return bridge;
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}
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SMARTLIST_FOREACH_END(ap);
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}
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if (digest && tor_memeq(bridge->identity, digest, DIGEST_LEN))
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return bridge;
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}
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SMARTLIST_FOREACH_END(bridge);
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return NULL;
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}
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/** If we have a bridge configured whose digest matches <b>digest</b>, or a
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* bridge with no known digest whose address matches <b>addr</b>:<b>port</b>,
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* return that bridge. Else return NULL. If <b>digest</b> is NULL, check for
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* address/port matches only. */
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static bridge_info_t *
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get_configured_bridge_by_addr_port_digest(const tor_addr_t *addr,
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uint16_t port,
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const char *digest)
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{
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if (!bridge_list)
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return NULL;
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SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, bridge)
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{
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if ((tor_digest_is_zero(bridge->identity) || digest == NULL) &&
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!tor_addr_compare(&bridge->addr, addr, CMP_EXACT) &&
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bridge->port == port)
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return bridge;
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if (digest && tor_memeq(bridge->identity, digest, DIGEST_LEN))
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return bridge;
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}
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SMARTLIST_FOREACH_END(bridge);
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return NULL;
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}
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/** If we have a bridge configured whose digest matches <b>digest</b>, or a
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* bridge with no known digest whose address matches <b>addr</b>:<b>port</b>,
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* return 1. Else return 0. If <b>digest</b> is NULL, check for
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* address/port matches only. */
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int
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addr_is_a_configured_bridge(const tor_addr_t *addr,
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uint16_t port,
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const char *digest)
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{
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tor_assert(addr);
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return get_configured_bridge_by_addr_port_digest(addr, port, digest) ? 1 : 0;
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}
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/** If we have a bridge configured whose digest matches
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* <b>ei->identity_digest</b>, or a bridge with no known digest whose address
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* matches <b>ei->addr</b>:<b>ei->port</b>, return 1. Else return 0.
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* If <b>ei->onion_key</b> is NULL, check for address/port matches only. */
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int
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extend_info_is_a_configured_bridge(const extend_info_t *ei)
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{
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const char *digest = ei->onion_key ? ei->identity_digest : NULL;
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return addr_is_a_configured_bridge(&ei->addr, ei->port, digest);
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}
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/** Wrapper around get_configured_bridge_by_addr_port_digest() to look
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* it up via router descriptor <b>ri</b>. */
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static bridge_info_t *
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get_configured_bridge_by_routerinfo(const routerinfo_t *ri)
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{
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bridge_info_t *bi = NULL;
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smartlist_t *orports = router_get_all_orports(ri);
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bi = get_configured_bridge_by_orports_digest(ri->cache_info.identity_digest,
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orports);
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SMARTLIST_FOREACH(orports, tor_addr_port_t *, p, tor_free(p));
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smartlist_free(orports);
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return bi;
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}
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/** Return 1 if <b>ri</b> is one of our known bridges, else 0. */
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int
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routerinfo_is_a_configured_bridge(const routerinfo_t *ri)
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{
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return get_configured_bridge_by_routerinfo(ri) ? 1 : 0;
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}
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/** Return 1 if <b>node</b> is one of our configured bridges, else 0. */
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int
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node_is_a_configured_bridge(const node_t *node)
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{
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int retval = 0;
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smartlist_t *orports = node_get_all_orports(node);
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retval = get_configured_bridge_by_orports_digest(node->identity,
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orports) != NULL;
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SMARTLIST_FOREACH(orports, tor_addr_port_t *, p, tor_free(p));
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smartlist_free(orports);
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return retval;
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}
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/** We made a connection to a router at <b>addr</b>:<b>port</b>
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* without knowing its digest. Its digest turned out to be <b>digest</b>.
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* If it was a bridge, and we still don't know its digest, record it.
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*/
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void
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learned_router_identity(const tor_addr_t *addr, uint16_t port,
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const char *digest)
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{
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bridge_info_t *bridge =
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get_configured_bridge_by_addr_port_digest(addr, port, digest);
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if (bridge && tor_digest_is_zero(bridge->identity)) {
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char *transport_info = NULL;
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const char *transport_name =
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find_transport_name_by_bridge_addrport(addr, port);
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if (transport_name)
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tor_asprintf(&transport_info, " (with transport '%s')", transport_name);
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memcpy(bridge->identity, digest, DIGEST_LEN);
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log_notice(LD_DIR, "Learned fingerprint %s for bridge %s%s.",
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hex_str(digest, DIGEST_LEN), fmt_addrport(addr, port),
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transport_info ? transport_info : "");
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tor_free(transport_info);
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}
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}
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/** Return true if <b>bridge</b> has the same identity digest as
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* <b>digest</b>. If <b>digest</b> is NULL, it matches
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* bridges with unspecified identity digests. */
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static int
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bridge_has_digest(const bridge_info_t *bridge, const char *digest)
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{
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if (digest)
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return tor_memeq(digest, bridge->identity, DIGEST_LEN);
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else
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return tor_digest_is_zero(bridge->identity);
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}
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/** We are about to add a new bridge at <b>addr</b>:<b>port</b>, with optional
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* <b>digest</b> and <b>transport_name</b>. Mark for removal any previously
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* existing bridge with the same address and port, and warn the user as
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* appropriate.
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*/
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static void
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bridge_resolve_conflicts(const tor_addr_t *addr, uint16_t port,
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const char *digest, const char *transport_name)
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{
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/* Iterate the already-registered bridge list:
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If you find a bridge with the same adress and port, mark it for
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removal. It doesn't make sense to have two active bridges with
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the same IP:PORT. If the bridge in question has a different
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digest or transport than <b>digest</b>/<b>transport_name</b>,
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it's probably a misconfiguration and we should warn the user.
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*/
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SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, bridge) {
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if (bridge->marked_for_removal)
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continue;
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if (tor_addr_eq(&bridge->addr, addr) && (bridge->port == port)) {
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bridge->marked_for_removal = 1;
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if (!bridge_has_digest(bridge, digest) ||
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strcmp_opt(bridge->transport_name, transport_name)) {
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/* warn the user */
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char *bridge_description_new, *bridge_description_old;
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tor_asprintf(&bridge_description_new, "%s:%s:%s",
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fmt_addrport(addr, port),
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digest ? hex_str(digest, DIGEST_LEN) : "",
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transport_name ? transport_name : "");
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tor_asprintf(&bridge_description_old, "%s:%s:%s",
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fmt_addrport(&bridge->addr, bridge->port),
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tor_digest_is_zero(bridge->identity) ?
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"" : hex_str(bridge->identity,DIGEST_LEN),
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bridge->transport_name ? bridge->transport_name : "");
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log_warn(LD_GENERAL,"Tried to add bridge '%s', but we found a conflict"
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" with the already registered bridge '%s'. We will discard"
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" the old bridge and keep '%s'. If this is not what you"
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" wanted, please change your configuration file accordingly.",
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bridge_description_new, bridge_description_old,
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bridge_description_new);
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tor_free(bridge_description_new);
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tor_free(bridge_description_old);
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}
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}
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} SMARTLIST_FOREACH_END(bridge);
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}
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/** Return True if we have a bridge that uses a transport with name
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* <b>transport_name</b>. */
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MOCK_IMPL(int,
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transport_is_needed, (const char *transport_name))
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{
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if (!bridge_list)
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return 0;
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SMARTLIST_FOREACH_BEGIN(bridge_list, const bridge_info_t *, bridge) {
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if (bridge->transport_name &&
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!strcmp(bridge->transport_name, transport_name))
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return 1;
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} SMARTLIST_FOREACH_END(bridge);
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return 0;
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}
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/** Register the bridge information in <b>bridge_line</b> to the
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* bridge subsystem. Steals reference of <b>bridge_line</b>. */
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void
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bridge_add_from_config(bridge_line_t *bridge_line)
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{
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bridge_info_t *b;
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{ /* Log the bridge we are about to register: */
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log_debug(LD_GENERAL, "Registering bridge at %s (transport: %s) (%s)",
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fmt_addrport(&bridge_line->addr, bridge_line->port),
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bridge_line->transport_name ?
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bridge_line->transport_name : "no transport",
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tor_digest_is_zero(bridge_line->digest) ?
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"no key listed" : hex_str(bridge_line->digest, DIGEST_LEN));
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if (bridge_line->socks_args) { /* print socks arguments */
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int i = 0;
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tor_assert(smartlist_len(bridge_line->socks_args) > 0);
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log_debug(LD_GENERAL, "Bridge uses %d SOCKS arguments:",
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smartlist_len(bridge_line->socks_args));
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SMARTLIST_FOREACH(bridge_line->socks_args, const char *, arg,
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log_debug(LD_CONFIG, "%d: %s", ++i, arg));
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}
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}
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bridge_resolve_conflicts(&bridge_line->addr,
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bridge_line->port,
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bridge_line->digest,
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bridge_line->transport_name);
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b = tor_malloc_zero(sizeof(bridge_info_t));
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tor_addr_copy(&b->addr, &bridge_line->addr);
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b->port = bridge_line->port;
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memcpy(b->identity, bridge_line->digest, DIGEST_LEN);
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if (bridge_line->transport_name)
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b->transport_name = bridge_line->transport_name;
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b->fetch_status.schedule = DL_SCHED_BRIDGE;
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b->fetch_status.backoff = DL_SCHED_RANDOM_EXPONENTIAL;
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b->socks_args = bridge_line->socks_args;
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if (!bridge_list)
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bridge_list = smartlist_new();
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tor_free(bridge_line); /* Deallocate bridge_line now. */
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smartlist_add(bridge_list, b);
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}
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/** Return true iff <b>routerset</b> contains the bridge <b>bridge</b>. */
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static int
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routerset_contains_bridge(const routerset_t *routerset,
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const bridge_info_t *bridge)
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{
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int result;
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extend_info_t *extinfo;
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tor_assert(bridge);
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if (!routerset)
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return 0;
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extinfo = extend_info_new(
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NULL, bridge->identity, NULL, NULL, &bridge->addr, bridge->port);
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result = routerset_contains_extendinfo(routerset, extinfo);
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extend_info_free(extinfo);
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return result;
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}
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/** If <b>digest</b> is one of our known bridges, return it. */
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static bridge_info_t *
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find_bridge_by_digest(const char *digest)
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{
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SMARTLIST_FOREACH(bridge_list, bridge_info_t *, bridge,
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{
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if (tor_memeq(bridge->identity, digest, DIGEST_LEN))
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return bridge;
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});
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return NULL;
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}
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/** Given the <b>addr</b> and <b>port</b> of a bridge, if that bridge
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* supports a pluggable transport, return its name. Otherwise, return
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* NULL. */
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const char *
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find_transport_name_by_bridge_addrport(const tor_addr_t *addr, uint16_t port)
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{
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if (!bridge_list)
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return NULL;
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SMARTLIST_FOREACH_BEGIN(bridge_list, const bridge_info_t *, bridge) {
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if (tor_addr_eq(&bridge->addr, addr) &&
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(bridge->port == port))
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return bridge->transport_name;
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} SMARTLIST_FOREACH_END(bridge);
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return NULL;
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}
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/** If <b>addr</b> and <b>port</b> match the address and port of a
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* bridge of ours that uses pluggable transports, place its transport
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* in <b>transport</b>.
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*
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* Return 0 on success (found a transport, or found a bridge with no
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* transport, or found no bridge); return -1 if we should be using a
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* transport, but the transport could not be found.
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*/
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int
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get_transport_by_bridge_addrport(const tor_addr_t *addr, uint16_t port,
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const transport_t **transport)
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{
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||||
*transport = NULL;
|
||||
if (!bridge_list)
|
||||
return 0;
|
||||
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, const bridge_info_t *, bridge) {
|
||||
if (tor_addr_eq(&bridge->addr, addr) &&
|
||||
(bridge->port == port)) { /* bridge matched */
|
||||
if (bridge->transport_name) { /* it also uses pluggable transports */
|
||||
*transport = transport_get_by_name(bridge->transport_name);
|
||||
if (*transport == NULL) { /* it uses pluggable transports, but
|
||||
the transport could not be found! */
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
} else { /* bridge matched, but it doesn't use transports. */
|
||||
break;
|
||||
}
|
||||
}
|
||||
} SMARTLIST_FOREACH_END(bridge);
|
||||
|
||||
*transport = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/** Return a smartlist containing all the SOCKS arguments that we
|
||||
* should pass to the SOCKS proxy. */
|
||||
const smartlist_t *
|
||||
get_socks_args_by_bridge_addrport(const tor_addr_t *addr, uint16_t port)
|
||||
{
|
||||
bridge_info_t *bridge = get_configured_bridge_by_addr_port_digest(addr,
|
||||
port,
|
||||
NULL);
|
||||
return bridge ? bridge->socks_args : NULL;
|
||||
}
|
||||
|
||||
/** We need to ask <b>bridge</b> for its server descriptor. */
|
||||
static void
|
||||
launch_direct_bridge_descriptor_fetch(bridge_info_t *bridge)
|
||||
{
|
||||
const or_options_t *options = get_options();
|
||||
|
||||
if (connection_get_by_type_addr_port_purpose(
|
||||
CONN_TYPE_DIR, &bridge->addr, bridge->port,
|
||||
DIR_PURPOSE_FETCH_SERVERDESC))
|
||||
return; /* it's already on the way */
|
||||
|
||||
if (routerset_contains_bridge(options->ExcludeNodes, bridge)) {
|
||||
download_status_mark_impossible(&bridge->fetch_status);
|
||||
log_warn(LD_APP, "Not using bridge at %s: it is in ExcludeNodes.",
|
||||
safe_str_client(fmt_and_decorate_addr(&bridge->addr)));
|
||||
return;
|
||||
}
|
||||
|
||||
/* Until we get a descriptor for the bridge, we only know one address for
|
||||
* it. */
|
||||
if (!fascist_firewall_allows_address_addr(&bridge->addr, bridge->port,
|
||||
FIREWALL_OR_CONNECTION, 0, 0)) {
|
||||
log_notice(LD_CONFIG, "Tried to fetch a descriptor directly from a "
|
||||
"bridge, but that bridge is not reachable through our "
|
||||
"firewall.");
|
||||
return;
|
||||
}
|
||||
|
||||
directory_initiate_command(&bridge->addr, bridge->port,
|
||||
NULL, 0, /*no dirport*/
|
||||
bridge->identity,
|
||||
DIR_PURPOSE_FETCH_SERVERDESC,
|
||||
ROUTER_PURPOSE_BRIDGE,
|
||||
DIRIND_ONEHOP, "authority.z", NULL, 0, 0);
|
||||
}
|
||||
|
||||
/** Fetching the bridge descriptor from the bridge authority returned a
|
||||
* "not found". Fall back to trying a direct fetch. */
|
||||
void
|
||||
retry_bridge_descriptor_fetch_directly(const char *digest)
|
||||
{
|
||||
bridge_info_t *bridge = find_bridge_by_digest(digest);
|
||||
if (!bridge)
|
||||
return; /* not found? oh well. */
|
||||
|
||||
launch_direct_bridge_descriptor_fetch(bridge);
|
||||
}
|
||||
|
||||
/** For each bridge in our list for which we don't currently have a
|
||||
* descriptor, fetch a new copy of its descriptor -- either directly
|
||||
* from the bridge or via a bridge authority. */
|
||||
void
|
||||
fetch_bridge_descriptors(const or_options_t *options, time_t now)
|
||||
{
|
||||
int num_bridge_auths = get_n_authorities(BRIDGE_DIRINFO);
|
||||
int ask_bridge_directly;
|
||||
int can_use_bridge_authority;
|
||||
|
||||
if (!bridge_list)
|
||||
return;
|
||||
|
||||
/* If we still have unconfigured managed proxies, don't go and
|
||||
connect to a bridge. */
|
||||
if (pt_proxies_configuration_pending())
|
||||
return;
|
||||
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, bridge)
|
||||
{
|
||||
if (!download_status_is_ready(&bridge->fetch_status, now,
|
||||
IMPOSSIBLE_TO_DOWNLOAD))
|
||||
continue; /* don't bother, no need to retry yet */
|
||||
if (routerset_contains_bridge(options->ExcludeNodes, bridge)) {
|
||||
download_status_mark_impossible(&bridge->fetch_status);
|
||||
log_warn(LD_APP, "Not using bridge at %s: it is in ExcludeNodes.",
|
||||
safe_str_client(fmt_and_decorate_addr(&bridge->addr)));
|
||||
continue;
|
||||
}
|
||||
|
||||
/* schedule another fetch as if this one will fail, in case it does */
|
||||
download_status_failed(&bridge->fetch_status, 0);
|
||||
|
||||
can_use_bridge_authority = !tor_digest_is_zero(bridge->identity) &&
|
||||
num_bridge_auths;
|
||||
ask_bridge_directly = !can_use_bridge_authority ||
|
||||
!options->UpdateBridgesFromAuthority;
|
||||
log_debug(LD_DIR, "ask_bridge_directly=%d (%d, %d, %d)",
|
||||
ask_bridge_directly, tor_digest_is_zero(bridge->identity),
|
||||
!options->UpdateBridgesFromAuthority, !num_bridge_auths);
|
||||
|
||||
if (ask_bridge_directly &&
|
||||
!fascist_firewall_allows_address_addr(&bridge->addr, bridge->port,
|
||||
FIREWALL_OR_CONNECTION, 0,
|
||||
0)) {
|
||||
log_notice(LD_DIR, "Bridge at '%s' isn't reachable by our "
|
||||
"firewall policy. %s.",
|
||||
fmt_addrport(&bridge->addr, bridge->port),
|
||||
can_use_bridge_authority ?
|
||||
"Asking bridge authority instead" : "Skipping");
|
||||
if (can_use_bridge_authority)
|
||||
ask_bridge_directly = 0;
|
||||
else
|
||||
continue;
|
||||
}
|
||||
|
||||
if (ask_bridge_directly) {
|
||||
/* we need to ask the bridge itself for its descriptor. */
|
||||
launch_direct_bridge_descriptor_fetch(bridge);
|
||||
} else {
|
||||
/* We have a digest and we want to ask an authority. We could
|
||||
* combine all the requests into one, but that may give more
|
||||
* hints to the bridge authority than we want to give. */
|
||||
char resource[10 + HEX_DIGEST_LEN];
|
||||
memcpy(resource, "fp/", 3);
|
||||
base16_encode(resource+3, HEX_DIGEST_LEN+1,
|
||||
bridge->identity, DIGEST_LEN);
|
||||
memcpy(resource+3+HEX_DIGEST_LEN, ".z", 3);
|
||||
log_info(LD_DIR, "Fetching bridge info '%s' from bridge authority.",
|
||||
resource);
|
||||
directory_get_from_dirserver(DIR_PURPOSE_FETCH_SERVERDESC,
|
||||
ROUTER_PURPOSE_BRIDGE, resource, 0, DL_WANT_AUTHORITY);
|
||||
}
|
||||
}
|
||||
SMARTLIST_FOREACH_END(bridge);
|
||||
}
|
||||
|
||||
/** If our <b>bridge</b> is configured to be a different address than
|
||||
* the bridge gives in <b>node</b>, rewrite the routerinfo
|
||||
* we received to use the address we meant to use. Now we handle
|
||||
* multihomed bridges better.
|
||||
*/
|
||||
static void
|
||||
rewrite_node_address_for_bridge(const bridge_info_t *bridge, node_t *node)
|
||||
{
|
||||
/* XXXX move this function. */
|
||||
/* XXXX overridden addresses should really live in the node_t, so that the
|
||||
* routerinfo_t and the microdesc_t can be immutable. But we can only
|
||||
* do that safely if we know that no function that connects to an OR
|
||||
* does so through an address from any source other than node_get_addr().
|
||||
*/
|
||||
tor_addr_t addr;
|
||||
const or_options_t *options = get_options();
|
||||
|
||||
if (node->ri) {
|
||||
routerinfo_t *ri = node->ri;
|
||||
tor_addr_from_ipv4h(&addr, ri->addr);
|
||||
|
||||
if ((!tor_addr_compare(&bridge->addr, &addr, CMP_EXACT) &&
|
||||
bridge->port == ri->or_port) ||
|
||||
(!tor_addr_compare(&bridge->addr, &ri->ipv6_addr, CMP_EXACT) &&
|
||||
bridge->port == ri->ipv6_orport)) {
|
||||
/* they match, so no need to do anything */
|
||||
} else {
|
||||
if (tor_addr_family(&bridge->addr) == AF_INET) {
|
||||
ri->addr = tor_addr_to_ipv4h(&bridge->addr);
|
||||
ri->or_port = bridge->port;
|
||||
log_info(LD_DIR,
|
||||
"Adjusted bridge routerinfo for '%s' to match configured "
|
||||
"address %s:%d.",
|
||||
ri->nickname, fmt_addr32(ri->addr), ri->or_port);
|
||||
} else if (tor_addr_family(&bridge->addr) == AF_INET6) {
|
||||
tor_addr_copy(&ri->ipv6_addr, &bridge->addr);
|
||||
ri->ipv6_orport = bridge->port;
|
||||
log_info(LD_DIR,
|
||||
"Adjusted bridge routerinfo for '%s' to match configured "
|
||||
"address %s.",
|
||||
ri->nickname, fmt_addrport(&ri->ipv6_addr, ri->ipv6_orport));
|
||||
} else {
|
||||
log_err(LD_BUG, "Address family not supported: %d.",
|
||||
tor_addr_family(&bridge->addr));
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
if (options->ClientPreferIPv6ORPort == -1) {
|
||||
/* Mark which address to use based on which bridge_t we got. */
|
||||
node->ipv6_preferred = (tor_addr_family(&bridge->addr) == AF_INET6 &&
|
||||
!tor_addr_is_null(&node->ri->ipv6_addr));
|
||||
} else {
|
||||
/* Mark which address to use based on user preference */
|
||||
node->ipv6_preferred = (fascist_firewall_prefer_ipv6_orport(options) &&
|
||||
!tor_addr_is_null(&node->ri->ipv6_addr));
|
||||
}
|
||||
|
||||
/* XXXipv6 we lack support for falling back to another address for
|
||||
the same relay, warn the user */
|
||||
if (!tor_addr_is_null(&ri->ipv6_addr)) {
|
||||
tor_addr_port_t ap;
|
||||
node_get_pref_orport(node, &ap);
|
||||
log_notice(LD_CONFIG,
|
||||
"Bridge '%s' has both an IPv4 and an IPv6 address. "
|
||||
"Will prefer using its %s address (%s) based on %s.",
|
||||
ri->nickname,
|
||||
node->ipv6_preferred ? "IPv6" : "IPv4",
|
||||
fmt_addrport(&ap.addr, ap.port),
|
||||
options->ClientPreferIPv6ORPort == -1 ?
|
||||
"the configured Bridge address" :
|
||||
"ClientPreferIPv6ORPort");
|
||||
}
|
||||
}
|
||||
if (node->rs) {
|
||||
routerstatus_t *rs = node->rs;
|
||||
tor_addr_from_ipv4h(&addr, rs->addr);
|
||||
|
||||
if (!tor_addr_compare(&bridge->addr, &addr, CMP_EXACT) &&
|
||||
bridge->port == rs->or_port) {
|
||||
/* they match, so no need to do anything */
|
||||
} else {
|
||||
rs->addr = tor_addr_to_ipv4h(&bridge->addr);
|
||||
rs->or_port = bridge->port;
|
||||
log_info(LD_DIR,
|
||||
"Adjusted bridge routerstatus for '%s' to match "
|
||||
"configured address %s.",
|
||||
rs->nickname, fmt_addrport(&bridge->addr, rs->or_port));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/** We just learned a descriptor for a bridge. See if that
|
||||
* digest is in our entry guard list, and add it if not. */
|
||||
void
|
||||
learned_bridge_descriptor(routerinfo_t *ri, int from_cache)
|
||||
{
|
||||
tor_assert(ri);
|
||||
tor_assert(ri->purpose == ROUTER_PURPOSE_BRIDGE);
|
||||
if (get_options()->UseBridges) {
|
||||
int first = num_bridges_usable() <= 1;
|
||||
bridge_info_t *bridge = get_configured_bridge_by_routerinfo(ri);
|
||||
time_t now = time(NULL);
|
||||
router_set_status(ri->cache_info.identity_digest, 1);
|
||||
|
||||
if (bridge) { /* if we actually want to use this one */
|
||||
node_t *node;
|
||||
/* it's here; schedule its re-fetch for a long time from now. */
|
||||
if (!from_cache)
|
||||
download_status_reset(&bridge->fetch_status);
|
||||
|
||||
node = node_get_mutable_by_id(ri->cache_info.identity_digest);
|
||||
tor_assert(node);
|
||||
rewrite_node_address_for_bridge(bridge, node);
|
||||
if (tor_digest_is_zero(bridge->identity)) {
|
||||
memcpy(bridge->identity,ri->cache_info.identity_digest, DIGEST_LEN);
|
||||
log_notice(LD_DIR, "Learned identity %s for bridge at %s:%d",
|
||||
hex_str(bridge->identity, DIGEST_LEN),
|
||||
fmt_and_decorate_addr(&bridge->addr),
|
||||
(int) bridge->port);
|
||||
}
|
||||
add_an_entry_guard(get_guard_selection_info(), node, 1, 1, 0, 0);
|
||||
|
||||
log_notice(LD_DIR, "new bridge descriptor '%s' (%s): %s", ri->nickname,
|
||||
from_cache ? "cached" : "fresh", router_describe(ri));
|
||||
/* set entry->made_contact so if it goes down we don't drop it from
|
||||
* our entry node list */
|
||||
entry_guard_register_connect_status(ri->cache_info.identity_digest,
|
||||
1, 0, now);
|
||||
if (first) {
|
||||
routerlist_retry_directory_downloads(now);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/** Return the number of bridges that have descriptors that
|
||||
* are marked with purpose 'bridge' and are running.
|
||||
*
|
||||
* We use this function to decide if we're ready to start building
|
||||
* circuits through our bridges, or if we need to wait until the
|
||||
* directory "server/authority" requests finish. */
|
||||
int
|
||||
any_bridge_descriptors_known(void)
|
||||
{
|
||||
tor_assert(get_options()->UseBridges);
|
||||
return choose_random_entry(NULL) != NULL;
|
||||
}
|
||||
|
||||
/** Return the number of bridges that have descriptors that are marked with
|
||||
* purpose 'bridge' and are running.
|
||||
*/
|
||||
static int
|
||||
num_bridges_usable(void)
|
||||
{
|
||||
int n_options = 0;
|
||||
tor_assert(get_options()->UseBridges);
|
||||
(void) choose_random_entry_impl(get_guard_selection_info(),
|
||||
NULL, 0, 0, &n_options);
|
||||
return n_options;
|
||||
}
|
||||
|
||||
/** Return a smartlist containing all bridge identity digests */
|
||||
MOCK_IMPL(smartlist_t *,
|
||||
list_bridge_identities, (void))
|
||||
{
|
||||
smartlist_t *result = NULL;
|
||||
char *digest_tmp;
|
||||
|
||||
if (get_options()->UseBridges && bridge_list) {
|
||||
result = smartlist_new();
|
||||
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, b) {
|
||||
digest_tmp = tor_malloc(DIGEST_LEN);
|
||||
memcpy(digest_tmp, b->identity, DIGEST_LEN);
|
||||
smartlist_add(result, digest_tmp);
|
||||
} SMARTLIST_FOREACH_END(b);
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
/** Get the download status for a bridge descriptor given its identity */
|
||||
MOCK_IMPL(download_status_t *,
|
||||
get_bridge_dl_status_by_id, (const char *digest))
|
||||
{
|
||||
download_status_t *dl = NULL;
|
||||
|
||||
if (digest && get_options()->UseBridges && bridge_list) {
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, b) {
|
||||
if (tor_memeq(digest, b->identity, DIGEST_LEN)) {
|
||||
dl = &(b->fetch_status);
|
||||
break;
|
||||
}
|
||||
} SMARTLIST_FOREACH_END(b);
|
||||
}
|
||||
|
||||
return dl;
|
||||
}
|
||||
|
||||
/** Release all storage held in bridges.c */
|
||||
void
|
||||
bridges_free_all(void)
|
||||
{
|
||||
clear_bridge_list();
|
||||
smartlist_free(bridge_list);
|
||||
bridge_list = NULL;
|
||||
}
|
||||
|
54
src/or/bridges.h
Normal file
54
src/or/bridges.h
Normal file
@ -0,0 +1,54 @@
|
||||
/* Copyright (c) 2001 Matej Pfajfar.
|
||||
* Copyright (c) 2001-2004, Roger Dingledine.
|
||||
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
|
||||
* Copyright (c) 2007-2016, The Tor Project, Inc. */
|
||||
/* See LICENSE for licensing information */
|
||||
|
||||
/**
|
||||
* \file bridges.h
|
||||
* \brief Header file for circuitbuild.c.
|
||||
**/
|
||||
|
||||
#ifndef TOR_BRIDGES_H
|
||||
#define TOR_BRIDGES_H
|
||||
|
||||
struct bridge_line_t;
|
||||
|
||||
void mark_bridge_list(void);
|
||||
void sweep_bridge_list(void);
|
||||
|
||||
int addr_is_a_configured_bridge(const tor_addr_t *addr, uint16_t port,
|
||||
const char *digest);
|
||||
int extend_info_is_a_configured_bridge(const extend_info_t *ei);
|
||||
int routerinfo_is_a_configured_bridge(const routerinfo_t *ri);
|
||||
int node_is_a_configured_bridge(const node_t *node);
|
||||
void learned_router_identity(const tor_addr_t *addr, uint16_t port,
|
||||
const char *digest);
|
||||
|
||||
void bridge_add_from_config(struct bridge_line_t *bridge_line);
|
||||
void retry_bridge_descriptor_fetch_directly(const char *digest);
|
||||
void fetch_bridge_descriptors(const or_options_t *options, time_t now);
|
||||
void learned_bridge_descriptor(routerinfo_t *ri, int from_cache);
|
||||
int any_bridge_descriptors_known(void);
|
||||
const smartlist_t *get_socks_args_by_bridge_addrport(const tor_addr_t *addr,
|
||||
uint16_t port);
|
||||
|
||||
int any_bridges_dont_support_microdescriptors(void);
|
||||
|
||||
const char *find_transport_name_by_bridge_addrport(const tor_addr_t *addr,
|
||||
uint16_t port);
|
||||
struct transport_t;
|
||||
int get_transport_by_bridge_addrport(const tor_addr_t *addr, uint16_t port,
|
||||
const struct transport_t **transport);
|
||||
|
||||
MOCK_DECL(int, transport_is_needed, (const char *transport_name));
|
||||
int validate_pluggable_transports_config(void);
|
||||
|
||||
MOCK_DECL(smartlist_t *, list_bridge_identities, (void));
|
||||
MOCK_DECL(download_status_t *, get_bridge_dl_status_by_id,
|
||||
(const char *digest));
|
||||
|
||||
void bridges_free_all(void);
|
||||
|
||||
#endif
|
||||
|
@ -28,6 +28,7 @@
|
||||
#define CIRCUITBUILD_PRIVATE
|
||||
|
||||
#include "or.h"
|
||||
#include "bridges.h"
|
||||
#include "channel.h"
|
||||
#include "circpathbias.h"
|
||||
#define CIRCUITBUILD_PRIVATE
|
||||
|
@ -29,6 +29,7 @@
|
||||
|
||||
#include "or.h"
|
||||
#include "addressmap.h"
|
||||
#include "bridges.h"
|
||||
#include "channel.h"
|
||||
#include "circpathbias.h"
|
||||
#include "circuitbuild.h"
|
||||
|
@ -60,6 +60,7 @@
|
||||
|
||||
#define CONFIG_PRIVATE
|
||||
#include "or.h"
|
||||
#include "bridges.h"
|
||||
#include "compat.h"
|
||||
#include "addressmap.h"
|
||||
#include "channel.h"
|
||||
|
@ -56,6 +56,7 @@
|
||||
|
||||
#define CONNECTION_PRIVATE
|
||||
#include "or.h"
|
||||
#include "bridges.h"
|
||||
#include "buffers.h"
|
||||
/*
|
||||
* Define this so we get channel internal functions, since we're implementing
|
||||
|
@ -21,6 +21,7 @@
|
||||
* This module also implements the client side of the v3 Tor link handshake,
|
||||
**/
|
||||
#include "or.h"
|
||||
#include "bridges.h"
|
||||
#include "buffers.h"
|
||||
/*
|
||||
* Define this so we get channel internal functions, since we're implementing
|
||||
|
@ -36,6 +36,7 @@
|
||||
|
||||
#include "or.h"
|
||||
#include "addressmap.h"
|
||||
#include "bridges.h"
|
||||
#include "buffers.h"
|
||||
#include "channel.h"
|
||||
#include "channeltls.h"
|
||||
|
@ -7,6 +7,7 @@
|
||||
|
||||
#include "or.h"
|
||||
#include "backtrace.h"
|
||||
#include "bridges.h"
|
||||
#include "buffers.h"
|
||||
#include "circuitbuild.h"
|
||||
#include "config.h"
|
||||
|
@ -15,6 +15,7 @@
|
||||
#define ENTRYNODES_PRIVATE
|
||||
|
||||
#include "or.h"
|
||||
#include "bridges.h"
|
||||
#include "circpathbias.h"
|
||||
#include "circuitbuild.h"
|
||||
#include "circuitstats.h"
|
||||
@ -37,32 +38,6 @@
|
||||
#include "transports.h"
|
||||
#include "statefile.h"
|
||||
|
||||
/** Information about a configured bridge. Currently this just matches the
|
||||
* ones in the torrc file, but one day we may be able to learn about new
|
||||
* bridges on our own, and remember them in the state file. */
|
||||
typedef struct {
|
||||
/** Address of the bridge. */
|
||||
tor_addr_t addr;
|
||||
/** TLS port for the bridge. */
|
||||
uint16_t port;
|
||||
/** Boolean: We are re-parsing our bridge list, and we are going to remove
|
||||
* this one if we don't find it in the list of configured bridges. */
|
||||
unsigned marked_for_removal : 1;
|
||||
/** Expected identity digest, or all zero bytes if we don't know what the
|
||||
* digest should be. */
|
||||
char identity[DIGEST_LEN];
|
||||
|
||||
/** Name of pluggable transport protocol taken from its config line. */
|
||||
char *transport_name;
|
||||
|
||||
/** When should we next try to fetch a descriptor for this bridge? */
|
||||
download_status_t fetch_status;
|
||||
|
||||
/** A smartlist of k=v values to be passed to the SOCKS proxy, if
|
||||
transports are used for this bridge. */
|
||||
smartlist_t *socks_args;
|
||||
} bridge_info_t;
|
||||
|
||||
/** All the context for guard selection on a particular client */
|
||||
|
||||
struct guard_selection_s {
|
||||
@ -99,14 +74,12 @@ struct guard_selection_s {
|
||||
static smartlist_t *guard_contexts = NULL;
|
||||
static guard_selection_t *curr_guard_context = NULL;
|
||||
|
||||
static void bridge_free(bridge_info_t *bridge);
|
||||
static const node_t *choose_random_entry_impl(guard_selection_t *gs,
|
||||
cpath_build_state_t *state,
|
||||
int for_directory,
|
||||
dirinfo_type_t dirtype,
|
||||
int *n_options_out);
|
||||
static guard_selection_t * guard_selection_new(void);
|
||||
static int num_bridges_usable(void);
|
||||
|
||||
/* Default number of entry guards in the case where the NumEntryGuards
|
||||
* consensus parameter is not set */
|
||||
@ -2282,330 +2255,6 @@ guard_get_guardfraction_bandwidth(guardfraction_bandwidth_t *guardfraction_bw,
|
||||
guardfraction_bw->non_guard_bw = orig_bandwidth - (int) guard_bw;
|
||||
}
|
||||
|
||||
/** A list of configured bridges. Whenever we actually get a descriptor
|
||||
* for one, we add it as an entry guard. Note that the order of bridges
|
||||
* in this list does not necessarily correspond to the order of bridges
|
||||
* in the torrc. */
|
||||
static smartlist_t *bridge_list = NULL;
|
||||
|
||||
/** Mark every entry of the bridge list to be removed on our next call to
|
||||
* sweep_bridge_list unless it has first been un-marked. */
|
||||
void
|
||||
mark_bridge_list(void)
|
||||
{
|
||||
if (!bridge_list)
|
||||
bridge_list = smartlist_new();
|
||||
SMARTLIST_FOREACH(bridge_list, bridge_info_t *, b,
|
||||
b->marked_for_removal = 1);
|
||||
}
|
||||
|
||||
/** Remove every entry of the bridge list that was marked with
|
||||
* mark_bridge_list if it has not subsequently been un-marked. */
|
||||
void
|
||||
sweep_bridge_list(void)
|
||||
{
|
||||
if (!bridge_list)
|
||||
bridge_list = smartlist_new();
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, b) {
|
||||
if (b->marked_for_removal) {
|
||||
SMARTLIST_DEL_CURRENT(bridge_list, b);
|
||||
bridge_free(b);
|
||||
}
|
||||
} SMARTLIST_FOREACH_END(b);
|
||||
}
|
||||
|
||||
/** Initialize the bridge list to empty, creating it if needed. */
|
||||
static void
|
||||
clear_bridge_list(void)
|
||||
{
|
||||
if (!bridge_list)
|
||||
bridge_list = smartlist_new();
|
||||
SMARTLIST_FOREACH(bridge_list, bridge_info_t *, b, bridge_free(b));
|
||||
smartlist_clear(bridge_list);
|
||||
}
|
||||
|
||||
/** Free the bridge <b>bridge</b>. */
|
||||
static void
|
||||
bridge_free(bridge_info_t *bridge)
|
||||
{
|
||||
if (!bridge)
|
||||
return;
|
||||
|
||||
tor_free(bridge->transport_name);
|
||||
if (bridge->socks_args) {
|
||||
SMARTLIST_FOREACH(bridge->socks_args, char*, s, tor_free(s));
|
||||
smartlist_free(bridge->socks_args);
|
||||
}
|
||||
|
||||
tor_free(bridge);
|
||||
}
|
||||
|
||||
/** If we have a bridge configured whose digest matches <b>digest</b>, or a
|
||||
* bridge with no known digest whose address matches any of the
|
||||
* tor_addr_port_t's in <b>orports</b>, return that bridge. Else return
|
||||
* NULL. */
|
||||
static bridge_info_t *
|
||||
get_configured_bridge_by_orports_digest(const char *digest,
|
||||
const smartlist_t *orports)
|
||||
{
|
||||
if (!bridge_list)
|
||||
return NULL;
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, bridge)
|
||||
{
|
||||
if (tor_digest_is_zero(bridge->identity)) {
|
||||
SMARTLIST_FOREACH_BEGIN(orports, tor_addr_port_t *, ap)
|
||||
{
|
||||
if (tor_addr_compare(&bridge->addr, &ap->addr, CMP_EXACT) == 0 &&
|
||||
bridge->port == ap->port)
|
||||
return bridge;
|
||||
}
|
||||
SMARTLIST_FOREACH_END(ap);
|
||||
}
|
||||
if (digest && tor_memeq(bridge->identity, digest, DIGEST_LEN))
|
||||
return bridge;
|
||||
}
|
||||
SMARTLIST_FOREACH_END(bridge);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/** If we have a bridge configured whose digest matches <b>digest</b>, or a
|
||||
* bridge with no known digest whose address matches <b>addr</b>:<b>port</b>,
|
||||
* return that bridge. Else return NULL. If <b>digest</b> is NULL, check for
|
||||
* address/port matches only. */
|
||||
static bridge_info_t *
|
||||
get_configured_bridge_by_addr_port_digest(const tor_addr_t *addr,
|
||||
uint16_t port,
|
||||
const char *digest)
|
||||
{
|
||||
if (!bridge_list)
|
||||
return NULL;
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, bridge)
|
||||
{
|
||||
if ((tor_digest_is_zero(bridge->identity) || digest == NULL) &&
|
||||
!tor_addr_compare(&bridge->addr, addr, CMP_EXACT) &&
|
||||
bridge->port == port)
|
||||
return bridge;
|
||||
if (digest && tor_memeq(bridge->identity, digest, DIGEST_LEN))
|
||||
return bridge;
|
||||
}
|
||||
SMARTLIST_FOREACH_END(bridge);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/** If we have a bridge configured whose digest matches <b>digest</b>, or a
|
||||
* bridge with no known digest whose address matches <b>addr</b>:<b>port</b>,
|
||||
* return 1. Else return 0. If <b>digest</b> is NULL, check for
|
||||
* address/port matches only. */
|
||||
int
|
||||
addr_is_a_configured_bridge(const tor_addr_t *addr,
|
||||
uint16_t port,
|
||||
const char *digest)
|
||||
{
|
||||
tor_assert(addr);
|
||||
return get_configured_bridge_by_addr_port_digest(addr, port, digest) ? 1 : 0;
|
||||
}
|
||||
|
||||
/** If we have a bridge configured whose digest matches
|
||||
* <b>ei->identity_digest</b>, or a bridge with no known digest whose address
|
||||
* matches <b>ei->addr</b>:<b>ei->port</b>, return 1. Else return 0.
|
||||
* If <b>ei->onion_key</b> is NULL, check for address/port matches only. */
|
||||
int
|
||||
extend_info_is_a_configured_bridge(const extend_info_t *ei)
|
||||
{
|
||||
const char *digest = ei->onion_key ? ei->identity_digest : NULL;
|
||||
return addr_is_a_configured_bridge(&ei->addr, ei->port, digest);
|
||||
}
|
||||
|
||||
/** Wrapper around get_configured_bridge_by_addr_port_digest() to look
|
||||
* it up via router descriptor <b>ri</b>. */
|
||||
static bridge_info_t *
|
||||
get_configured_bridge_by_routerinfo(const routerinfo_t *ri)
|
||||
{
|
||||
bridge_info_t *bi = NULL;
|
||||
smartlist_t *orports = router_get_all_orports(ri);
|
||||
bi = get_configured_bridge_by_orports_digest(ri->cache_info.identity_digest,
|
||||
orports);
|
||||
SMARTLIST_FOREACH(orports, tor_addr_port_t *, p, tor_free(p));
|
||||
smartlist_free(orports);
|
||||
return bi;
|
||||
}
|
||||
|
||||
/** Return 1 if <b>ri</b> is one of our known bridges, else 0. */
|
||||
int
|
||||
routerinfo_is_a_configured_bridge(const routerinfo_t *ri)
|
||||
{
|
||||
return get_configured_bridge_by_routerinfo(ri) ? 1 : 0;
|
||||
}
|
||||
|
||||
/** Return 1 if <b>node</b> is one of our configured bridges, else 0. */
|
||||
int
|
||||
node_is_a_configured_bridge(const node_t *node)
|
||||
{
|
||||
int retval = 0;
|
||||
smartlist_t *orports = node_get_all_orports(node);
|
||||
retval = get_configured_bridge_by_orports_digest(node->identity,
|
||||
orports) != NULL;
|
||||
SMARTLIST_FOREACH(orports, tor_addr_port_t *, p, tor_free(p));
|
||||
smartlist_free(orports);
|
||||
return retval;
|
||||
}
|
||||
|
||||
/** We made a connection to a router at <b>addr</b>:<b>port</b>
|
||||
* without knowing its digest. Its digest turned out to be <b>digest</b>.
|
||||
* If it was a bridge, and we still don't know its digest, record it.
|
||||
*/
|
||||
void
|
||||
learned_router_identity(const tor_addr_t *addr, uint16_t port,
|
||||
const char *digest)
|
||||
{
|
||||
bridge_info_t *bridge =
|
||||
get_configured_bridge_by_addr_port_digest(addr, port, digest);
|
||||
if (bridge && tor_digest_is_zero(bridge->identity)) {
|
||||
char *transport_info = NULL;
|
||||
const char *transport_name =
|
||||
find_transport_name_by_bridge_addrport(addr, port);
|
||||
if (transport_name)
|
||||
tor_asprintf(&transport_info, " (with transport '%s')", transport_name);
|
||||
|
||||
memcpy(bridge->identity, digest, DIGEST_LEN);
|
||||
log_notice(LD_DIR, "Learned fingerprint %s for bridge %s%s.",
|
||||
hex_str(digest, DIGEST_LEN), fmt_addrport(addr, port),
|
||||
transport_info ? transport_info : "");
|
||||
tor_free(transport_info);
|
||||
}
|
||||
}
|
||||
|
||||
/** Return true if <b>bridge</b> has the same identity digest as
|
||||
* <b>digest</b>. If <b>digest</b> is NULL, it matches
|
||||
* bridges with unspecified identity digests. */
|
||||
static int
|
||||
bridge_has_digest(const bridge_info_t *bridge, const char *digest)
|
||||
{
|
||||
if (digest)
|
||||
return tor_memeq(digest, bridge->identity, DIGEST_LEN);
|
||||
else
|
||||
return tor_digest_is_zero(bridge->identity);
|
||||
}
|
||||
|
||||
/** We are about to add a new bridge at <b>addr</b>:<b>port</b>, with optional
|
||||
* <b>digest</b> and <b>transport_name</b>. Mark for removal any previously
|
||||
* existing bridge with the same address and port, and warn the user as
|
||||
* appropriate.
|
||||
*/
|
||||
static void
|
||||
bridge_resolve_conflicts(const tor_addr_t *addr, uint16_t port,
|
||||
const char *digest, const char *transport_name)
|
||||
{
|
||||
/* Iterate the already-registered bridge list:
|
||||
|
||||
If you find a bridge with the same adress and port, mark it for
|
||||
removal. It doesn't make sense to have two active bridges with
|
||||
the same IP:PORT. If the bridge in question has a different
|
||||
digest or transport than <b>digest</b>/<b>transport_name</b>,
|
||||
it's probably a misconfiguration and we should warn the user.
|
||||
*/
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, bridge) {
|
||||
if (bridge->marked_for_removal)
|
||||
continue;
|
||||
|
||||
if (tor_addr_eq(&bridge->addr, addr) && (bridge->port == port)) {
|
||||
|
||||
bridge->marked_for_removal = 1;
|
||||
|
||||
if (!bridge_has_digest(bridge, digest) ||
|
||||
strcmp_opt(bridge->transport_name, transport_name)) {
|
||||
/* warn the user */
|
||||
char *bridge_description_new, *bridge_description_old;
|
||||
tor_asprintf(&bridge_description_new, "%s:%s:%s",
|
||||
fmt_addrport(addr, port),
|
||||
digest ? hex_str(digest, DIGEST_LEN) : "",
|
||||
transport_name ? transport_name : "");
|
||||
tor_asprintf(&bridge_description_old, "%s:%s:%s",
|
||||
fmt_addrport(&bridge->addr, bridge->port),
|
||||
tor_digest_is_zero(bridge->identity) ?
|
||||
"" : hex_str(bridge->identity,DIGEST_LEN),
|
||||
bridge->transport_name ? bridge->transport_name : "");
|
||||
|
||||
log_warn(LD_GENERAL,"Tried to add bridge '%s', but we found a conflict"
|
||||
" with the already registered bridge '%s'. We will discard"
|
||||
" the old bridge and keep '%s'. If this is not what you"
|
||||
" wanted, please change your configuration file accordingly.",
|
||||
bridge_description_new, bridge_description_old,
|
||||
bridge_description_new);
|
||||
|
||||
tor_free(bridge_description_new);
|
||||
tor_free(bridge_description_old);
|
||||
}
|
||||
}
|
||||
} SMARTLIST_FOREACH_END(bridge);
|
||||
}
|
||||
|
||||
/** Return True if we have a bridge that uses a transport with name
|
||||
* <b>transport_name</b>. */
|
||||
MOCK_IMPL(int,
|
||||
transport_is_needed, (const char *transport_name))
|
||||
{
|
||||
if (!bridge_list)
|
||||
return 0;
|
||||
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, const bridge_info_t *, bridge) {
|
||||
if (bridge->transport_name &&
|
||||
!strcmp(bridge->transport_name, transport_name))
|
||||
return 1;
|
||||
} SMARTLIST_FOREACH_END(bridge);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/** Register the bridge information in <b>bridge_line</b> to the
|
||||
* bridge subsystem. Steals reference of <b>bridge_line</b>. */
|
||||
void
|
||||
bridge_add_from_config(bridge_line_t *bridge_line)
|
||||
{
|
||||
bridge_info_t *b;
|
||||
|
||||
{ /* Log the bridge we are about to register: */
|
||||
log_debug(LD_GENERAL, "Registering bridge at %s (transport: %s) (%s)",
|
||||
fmt_addrport(&bridge_line->addr, bridge_line->port),
|
||||
bridge_line->transport_name ?
|
||||
bridge_line->transport_name : "no transport",
|
||||
tor_digest_is_zero(bridge_line->digest) ?
|
||||
"no key listed" : hex_str(bridge_line->digest, DIGEST_LEN));
|
||||
|
||||
if (bridge_line->socks_args) { /* print socks arguments */
|
||||
int i = 0;
|
||||
|
||||
tor_assert(smartlist_len(bridge_line->socks_args) > 0);
|
||||
|
||||
log_debug(LD_GENERAL, "Bridge uses %d SOCKS arguments:",
|
||||
smartlist_len(bridge_line->socks_args));
|
||||
SMARTLIST_FOREACH(bridge_line->socks_args, const char *, arg,
|
||||
log_debug(LD_CONFIG, "%d: %s", ++i, arg));
|
||||
}
|
||||
}
|
||||
|
||||
bridge_resolve_conflicts(&bridge_line->addr,
|
||||
bridge_line->port,
|
||||
bridge_line->digest,
|
||||
bridge_line->transport_name);
|
||||
|
||||
b = tor_malloc_zero(sizeof(bridge_info_t));
|
||||
tor_addr_copy(&b->addr, &bridge_line->addr);
|
||||
b->port = bridge_line->port;
|
||||
memcpy(b->identity, bridge_line->digest, DIGEST_LEN);
|
||||
if (bridge_line->transport_name)
|
||||
b->transport_name = bridge_line->transport_name;
|
||||
b->fetch_status.schedule = DL_SCHED_BRIDGE;
|
||||
b->fetch_status.backoff = DL_SCHED_RANDOM_EXPONENTIAL;
|
||||
b->socks_args = bridge_line->socks_args;
|
||||
if (!bridge_list)
|
||||
bridge_list = smartlist_new();
|
||||
|
||||
tor_free(bridge_line); /* Deallocate bridge_line now. */
|
||||
|
||||
smartlist_add(bridge_list, b);
|
||||
}
|
||||
|
||||
/** Returns true iff the node is used as a guard in the specified guard
|
||||
* context */
|
||||
int
|
||||
@ -2642,426 +2291,6 @@ is_node_used_as_guard, (const node_t *node))
|
||||
get_guard_selection_info(), node);
|
||||
}
|
||||
|
||||
/** Return true iff <b>routerset</b> contains the bridge <b>bridge</b>. */
|
||||
static int
|
||||
routerset_contains_bridge(const routerset_t *routerset,
|
||||
const bridge_info_t *bridge)
|
||||
{
|
||||
int result;
|
||||
extend_info_t *extinfo;
|
||||
tor_assert(bridge);
|
||||
if (!routerset)
|
||||
return 0;
|
||||
|
||||
extinfo = extend_info_new(
|
||||
NULL, bridge->identity, NULL, NULL, &bridge->addr, bridge->port);
|
||||
result = routerset_contains_extendinfo(routerset, extinfo);
|
||||
extend_info_free(extinfo);
|
||||
return result;
|
||||
}
|
||||
|
||||
/** If <b>digest</b> is one of our known bridges, return it. */
|
||||
static bridge_info_t *
|
||||
find_bridge_by_digest(const char *digest)
|
||||
{
|
||||
SMARTLIST_FOREACH(bridge_list, bridge_info_t *, bridge,
|
||||
{
|
||||
if (tor_memeq(bridge->identity, digest, DIGEST_LEN))
|
||||
return bridge;
|
||||
});
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/** Given the <b>addr</b> and <b>port</b> of a bridge, if that bridge
|
||||
* supports a pluggable transport, return its name. Otherwise, return
|
||||
* NULL. */
|
||||
const char *
|
||||
find_transport_name_by_bridge_addrport(const tor_addr_t *addr, uint16_t port)
|
||||
{
|
||||
if (!bridge_list)
|
||||
return NULL;
|
||||
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, const bridge_info_t *, bridge) {
|
||||
if (tor_addr_eq(&bridge->addr, addr) &&
|
||||
(bridge->port == port))
|
||||
return bridge->transport_name;
|
||||
} SMARTLIST_FOREACH_END(bridge);
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/** If <b>addr</b> and <b>port</b> match the address and port of a
|
||||
* bridge of ours that uses pluggable transports, place its transport
|
||||
* in <b>transport</b>.
|
||||
*
|
||||
* Return 0 on success (found a transport, or found a bridge with no
|
||||
* transport, or found no bridge); return -1 if we should be using a
|
||||
* transport, but the transport could not be found.
|
||||
*/
|
||||
int
|
||||
get_transport_by_bridge_addrport(const tor_addr_t *addr, uint16_t port,
|
||||
const transport_t **transport)
|
||||
{
|
||||
*transport = NULL;
|
||||
if (!bridge_list)
|
||||
return 0;
|
||||
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, const bridge_info_t *, bridge) {
|
||||
if (tor_addr_eq(&bridge->addr, addr) &&
|
||||
(bridge->port == port)) { /* bridge matched */
|
||||
if (bridge->transport_name) { /* it also uses pluggable transports */
|
||||
*transport = transport_get_by_name(bridge->transport_name);
|
||||
if (*transport == NULL) { /* it uses pluggable transports, but
|
||||
the transport could not be found! */
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
} else { /* bridge matched, but it doesn't use transports. */
|
||||
break;
|
||||
}
|
||||
}
|
||||
} SMARTLIST_FOREACH_END(bridge);
|
||||
|
||||
*transport = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/** Return a smartlist containing all the SOCKS arguments that we
|
||||
* should pass to the SOCKS proxy. */
|
||||
const smartlist_t *
|
||||
get_socks_args_by_bridge_addrport(const tor_addr_t *addr, uint16_t port)
|
||||
{
|
||||
bridge_info_t *bridge = get_configured_bridge_by_addr_port_digest(addr,
|
||||
port,
|
||||
NULL);
|
||||
return bridge ? bridge->socks_args : NULL;
|
||||
}
|
||||
|
||||
/** We need to ask <b>bridge</b> for its server descriptor. */
|
||||
static void
|
||||
launch_direct_bridge_descriptor_fetch(bridge_info_t *bridge)
|
||||
{
|
||||
const or_options_t *options = get_options();
|
||||
|
||||
if (connection_get_by_type_addr_port_purpose(
|
||||
CONN_TYPE_DIR, &bridge->addr, bridge->port,
|
||||
DIR_PURPOSE_FETCH_SERVERDESC))
|
||||
return; /* it's already on the way */
|
||||
|
||||
if (routerset_contains_bridge(options->ExcludeNodes, bridge)) {
|
||||
download_status_mark_impossible(&bridge->fetch_status);
|
||||
log_warn(LD_APP, "Not using bridge at %s: it is in ExcludeNodes.",
|
||||
safe_str_client(fmt_and_decorate_addr(&bridge->addr)));
|
||||
return;
|
||||
}
|
||||
|
||||
/* Until we get a descriptor for the bridge, we only know one address for
|
||||
* it. */
|
||||
if (!fascist_firewall_allows_address_addr(&bridge->addr, bridge->port,
|
||||
FIREWALL_OR_CONNECTION, 0, 0)) {
|
||||
log_notice(LD_CONFIG, "Tried to fetch a descriptor directly from a "
|
||||
"bridge, but that bridge is not reachable through our "
|
||||
"firewall.");
|
||||
return;
|
||||
}
|
||||
|
||||
directory_initiate_command(&bridge->addr, bridge->port,
|
||||
NULL, 0, /*no dirport*/
|
||||
bridge->identity,
|
||||
DIR_PURPOSE_FETCH_SERVERDESC,
|
||||
ROUTER_PURPOSE_BRIDGE,
|
||||
DIRIND_ONEHOP, "authority.z", NULL, 0, 0);
|
||||
}
|
||||
|
||||
/** Fetching the bridge descriptor from the bridge authority returned a
|
||||
* "not found". Fall back to trying a direct fetch. */
|
||||
void
|
||||
retry_bridge_descriptor_fetch_directly(const char *digest)
|
||||
{
|
||||
bridge_info_t *bridge = find_bridge_by_digest(digest);
|
||||
if (!bridge)
|
||||
return; /* not found? oh well. */
|
||||
|
||||
launch_direct_bridge_descriptor_fetch(bridge);
|
||||
}
|
||||
|
||||
/** For each bridge in our list for which we don't currently have a
|
||||
* descriptor, fetch a new copy of its descriptor -- either directly
|
||||
* from the bridge or via a bridge authority. */
|
||||
void
|
||||
fetch_bridge_descriptors(const or_options_t *options, time_t now)
|
||||
{
|
||||
int num_bridge_auths = get_n_authorities(BRIDGE_DIRINFO);
|
||||
int ask_bridge_directly;
|
||||
int can_use_bridge_authority;
|
||||
|
||||
if (!bridge_list)
|
||||
return;
|
||||
|
||||
/* If we still have unconfigured managed proxies, don't go and
|
||||
connect to a bridge. */
|
||||
if (pt_proxies_configuration_pending())
|
||||
return;
|
||||
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, bridge)
|
||||
{
|
||||
if (!download_status_is_ready(&bridge->fetch_status, now,
|
||||
IMPOSSIBLE_TO_DOWNLOAD))
|
||||
continue; /* don't bother, no need to retry yet */
|
||||
if (routerset_contains_bridge(options->ExcludeNodes, bridge)) {
|
||||
download_status_mark_impossible(&bridge->fetch_status);
|
||||
log_warn(LD_APP, "Not using bridge at %s: it is in ExcludeNodes.",
|
||||
safe_str_client(fmt_and_decorate_addr(&bridge->addr)));
|
||||
continue;
|
||||
}
|
||||
|
||||
/* schedule another fetch as if this one will fail, in case it does */
|
||||
download_status_failed(&bridge->fetch_status, 0);
|
||||
|
||||
can_use_bridge_authority = !tor_digest_is_zero(bridge->identity) &&
|
||||
num_bridge_auths;
|
||||
ask_bridge_directly = !can_use_bridge_authority ||
|
||||
!options->UpdateBridgesFromAuthority;
|
||||
log_debug(LD_DIR, "ask_bridge_directly=%d (%d, %d, %d)",
|
||||
ask_bridge_directly, tor_digest_is_zero(bridge->identity),
|
||||
!options->UpdateBridgesFromAuthority, !num_bridge_auths);
|
||||
|
||||
if (ask_bridge_directly &&
|
||||
!fascist_firewall_allows_address_addr(&bridge->addr, bridge->port,
|
||||
FIREWALL_OR_CONNECTION, 0,
|
||||
0)) {
|
||||
log_notice(LD_DIR, "Bridge at '%s' isn't reachable by our "
|
||||
"firewall policy. %s.",
|
||||
fmt_addrport(&bridge->addr, bridge->port),
|
||||
can_use_bridge_authority ?
|
||||
"Asking bridge authority instead" : "Skipping");
|
||||
if (can_use_bridge_authority)
|
||||
ask_bridge_directly = 0;
|
||||
else
|
||||
continue;
|
||||
}
|
||||
|
||||
if (ask_bridge_directly) {
|
||||
/* we need to ask the bridge itself for its descriptor. */
|
||||
launch_direct_bridge_descriptor_fetch(bridge);
|
||||
} else {
|
||||
/* We have a digest and we want to ask an authority. We could
|
||||
* combine all the requests into one, but that may give more
|
||||
* hints to the bridge authority than we want to give. */
|
||||
char resource[10 + HEX_DIGEST_LEN];
|
||||
memcpy(resource, "fp/", 3);
|
||||
base16_encode(resource+3, HEX_DIGEST_LEN+1,
|
||||
bridge->identity, DIGEST_LEN);
|
||||
memcpy(resource+3+HEX_DIGEST_LEN, ".z", 3);
|
||||
log_info(LD_DIR, "Fetching bridge info '%s' from bridge authority.",
|
||||
resource);
|
||||
directory_get_from_dirserver(DIR_PURPOSE_FETCH_SERVERDESC,
|
||||
ROUTER_PURPOSE_BRIDGE, resource, 0, DL_WANT_AUTHORITY);
|
||||
}
|
||||
}
|
||||
SMARTLIST_FOREACH_END(bridge);
|
||||
}
|
||||
|
||||
/** If our <b>bridge</b> is configured to be a different address than
|
||||
* the bridge gives in <b>node</b>, rewrite the routerinfo
|
||||
* we received to use the address we meant to use. Now we handle
|
||||
* multihomed bridges better.
|
||||
*/
|
||||
static void
|
||||
rewrite_node_address_for_bridge(const bridge_info_t *bridge, node_t *node)
|
||||
{
|
||||
/* XXXX move this function. */
|
||||
/* XXXX overridden addresses should really live in the node_t, so that the
|
||||
* routerinfo_t and the microdesc_t can be immutable. But we can only
|
||||
* do that safely if we know that no function that connects to an OR
|
||||
* does so through an address from any source other than node_get_addr().
|
||||
*/
|
||||
tor_addr_t addr;
|
||||
const or_options_t *options = get_options();
|
||||
|
||||
if (node->ri) {
|
||||
routerinfo_t *ri = node->ri;
|
||||
tor_addr_from_ipv4h(&addr, ri->addr);
|
||||
|
||||
if ((!tor_addr_compare(&bridge->addr, &addr, CMP_EXACT) &&
|
||||
bridge->port == ri->or_port) ||
|
||||
(!tor_addr_compare(&bridge->addr, &ri->ipv6_addr, CMP_EXACT) &&
|
||||
bridge->port == ri->ipv6_orport)) {
|
||||
/* they match, so no need to do anything */
|
||||
} else {
|
||||
if (tor_addr_family(&bridge->addr) == AF_INET) {
|
||||
ri->addr = tor_addr_to_ipv4h(&bridge->addr);
|
||||
ri->or_port = bridge->port;
|
||||
log_info(LD_DIR,
|
||||
"Adjusted bridge routerinfo for '%s' to match configured "
|
||||
"address %s:%d.",
|
||||
ri->nickname, fmt_addr32(ri->addr), ri->or_port);
|
||||
} else if (tor_addr_family(&bridge->addr) == AF_INET6) {
|
||||
tor_addr_copy(&ri->ipv6_addr, &bridge->addr);
|
||||
ri->ipv6_orport = bridge->port;
|
||||
log_info(LD_DIR,
|
||||
"Adjusted bridge routerinfo for '%s' to match configured "
|
||||
"address %s.",
|
||||
ri->nickname, fmt_addrport(&ri->ipv6_addr, ri->ipv6_orport));
|
||||
} else {
|
||||
log_err(LD_BUG, "Address family not supported: %d.",
|
||||
tor_addr_family(&bridge->addr));
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
if (options->ClientPreferIPv6ORPort == -1) {
|
||||
/* Mark which address to use based on which bridge_t we got. */
|
||||
node->ipv6_preferred = (tor_addr_family(&bridge->addr) == AF_INET6 &&
|
||||
!tor_addr_is_null(&node->ri->ipv6_addr));
|
||||
} else {
|
||||
/* Mark which address to use based on user preference */
|
||||
node->ipv6_preferred = (fascist_firewall_prefer_ipv6_orport(options) &&
|
||||
!tor_addr_is_null(&node->ri->ipv6_addr));
|
||||
}
|
||||
|
||||
/* XXXipv6 we lack support for falling back to another address for
|
||||
the same relay, warn the user */
|
||||
if (!tor_addr_is_null(&ri->ipv6_addr)) {
|
||||
tor_addr_port_t ap;
|
||||
node_get_pref_orport(node, &ap);
|
||||
log_notice(LD_CONFIG,
|
||||
"Bridge '%s' has both an IPv4 and an IPv6 address. "
|
||||
"Will prefer using its %s address (%s) based on %s.",
|
||||
ri->nickname,
|
||||
node->ipv6_preferred ? "IPv6" : "IPv4",
|
||||
fmt_addrport(&ap.addr, ap.port),
|
||||
options->ClientPreferIPv6ORPort == -1 ?
|
||||
"the configured Bridge address" :
|
||||
"ClientPreferIPv6ORPort");
|
||||
}
|
||||
}
|
||||
if (node->rs) {
|
||||
routerstatus_t *rs = node->rs;
|
||||
tor_addr_from_ipv4h(&addr, rs->addr);
|
||||
|
||||
if (!tor_addr_compare(&bridge->addr, &addr, CMP_EXACT) &&
|
||||
bridge->port == rs->or_port) {
|
||||
/* they match, so no need to do anything */
|
||||
} else {
|
||||
rs->addr = tor_addr_to_ipv4h(&bridge->addr);
|
||||
rs->or_port = bridge->port;
|
||||
log_info(LD_DIR,
|
||||
"Adjusted bridge routerstatus for '%s' to match "
|
||||
"configured address %s.",
|
||||
rs->nickname, fmt_addrport(&bridge->addr, rs->or_port));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/** We just learned a descriptor for a bridge. See if that
|
||||
* digest is in our entry guard list, and add it if not. */
|
||||
void
|
||||
learned_bridge_descriptor(routerinfo_t *ri, int from_cache)
|
||||
{
|
||||
tor_assert(ri);
|
||||
tor_assert(ri->purpose == ROUTER_PURPOSE_BRIDGE);
|
||||
if (get_options()->UseBridges) {
|
||||
int first = num_bridges_usable() <= 1;
|
||||
bridge_info_t *bridge = get_configured_bridge_by_routerinfo(ri);
|
||||
time_t now = time(NULL);
|
||||
router_set_status(ri->cache_info.identity_digest, 1);
|
||||
|
||||
if (bridge) { /* if we actually want to use this one */
|
||||
node_t *node;
|
||||
/* it's here; schedule its re-fetch for a long time from now. */
|
||||
if (!from_cache)
|
||||
download_status_reset(&bridge->fetch_status);
|
||||
|
||||
node = node_get_mutable_by_id(ri->cache_info.identity_digest);
|
||||
tor_assert(node);
|
||||
rewrite_node_address_for_bridge(bridge, node);
|
||||
if (tor_digest_is_zero(bridge->identity)) {
|
||||
memcpy(bridge->identity,ri->cache_info.identity_digest, DIGEST_LEN);
|
||||
log_notice(LD_DIR, "Learned identity %s for bridge at %s:%d",
|
||||
hex_str(bridge->identity, DIGEST_LEN),
|
||||
fmt_and_decorate_addr(&bridge->addr),
|
||||
(int) bridge->port);
|
||||
}
|
||||
add_an_entry_guard(get_guard_selection_info(), node, 1, 1, 0, 0);
|
||||
|
||||
log_notice(LD_DIR, "new bridge descriptor '%s' (%s): %s", ri->nickname,
|
||||
from_cache ? "cached" : "fresh", router_describe(ri));
|
||||
/* set entry->made_contact so if it goes down we don't drop it from
|
||||
* our entry node list */
|
||||
entry_guard_register_connect_status(ri->cache_info.identity_digest,
|
||||
1, 0, now);
|
||||
if (first) {
|
||||
routerlist_retry_directory_downloads(now);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/** Return the number of bridges that have descriptors that
|
||||
* are marked with purpose 'bridge' and are running.
|
||||
*
|
||||
* We use this function to decide if we're ready to start building
|
||||
* circuits through our bridges, or if we need to wait until the
|
||||
* directory "server/authority" requests finish. */
|
||||
int
|
||||
any_bridge_descriptors_known(void)
|
||||
{
|
||||
tor_assert(get_options()->UseBridges);
|
||||
return choose_random_entry(NULL) != NULL;
|
||||
}
|
||||
|
||||
/** Return the number of bridges that have descriptors that are marked with
|
||||
* purpose 'bridge' and are running.
|
||||
*/
|
||||
static int
|
||||
num_bridges_usable(void)
|
||||
{
|
||||
int n_options = 0;
|
||||
tor_assert(get_options()->UseBridges);
|
||||
(void) choose_random_entry_impl(get_guard_selection_info(),
|
||||
NULL, 0, 0, &n_options);
|
||||
return n_options;
|
||||
}
|
||||
|
||||
/** Return a smartlist containing all bridge identity digests */
|
||||
MOCK_IMPL(smartlist_t *,
|
||||
list_bridge_identities, (void))
|
||||
{
|
||||
smartlist_t *result = NULL;
|
||||
char *digest_tmp;
|
||||
|
||||
if (get_options()->UseBridges && bridge_list) {
|
||||
result = smartlist_new();
|
||||
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, b) {
|
||||
digest_tmp = tor_malloc(DIGEST_LEN);
|
||||
memcpy(digest_tmp, b->identity, DIGEST_LEN);
|
||||
smartlist_add(result, digest_tmp);
|
||||
} SMARTLIST_FOREACH_END(b);
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
/** Get the download status for a bridge descriptor given its identity */
|
||||
MOCK_IMPL(download_status_t *,
|
||||
get_bridge_dl_status_by_id, (const char *digest))
|
||||
{
|
||||
download_status_t *dl = NULL;
|
||||
|
||||
if (digest && get_options()->UseBridges && bridge_list) {
|
||||
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, b) {
|
||||
if (tor_memeq(digest, b->identity, DIGEST_LEN)) {
|
||||
dl = &(b->fetch_status);
|
||||
break;
|
||||
}
|
||||
} SMARTLIST_FOREACH_END(b);
|
||||
}
|
||||
|
||||
return dl;
|
||||
}
|
||||
|
||||
/** Return 1 if we have at least one descriptor for an entry guard
|
||||
* (bridge or member of EntryNodes) and all descriptors we know are
|
||||
* down. Else return 0. If <b>act</b> is 1, then mark the down guards
|
||||
@ -3163,9 +2392,6 @@ entry_guards_free_all(void)
|
||||
smartlist_free(guard_contexts);
|
||||
guard_contexts = NULL;
|
||||
}
|
||||
clear_bridge_list();
|
||||
smartlist_free(bridge_list);
|
||||
bridge_list = NULL;
|
||||
circuit_build_times_free_timeouts(get_circuit_build_times_mutable());
|
||||
}
|
||||
|
||||
|
@ -221,41 +221,11 @@ int is_node_used_as_guard_for_guard_selection(guard_selection_t *gs,
|
||||
const node_t *node);
|
||||
MOCK_DECL(int, is_node_used_as_guard, (const node_t *node));
|
||||
|
||||
void mark_bridge_list(void);
|
||||
void sweep_bridge_list(void);
|
||||
|
||||
int addr_is_a_configured_bridge(const tor_addr_t *addr, uint16_t port,
|
||||
const char *digest);
|
||||
int extend_info_is_a_configured_bridge(const extend_info_t *ei);
|
||||
int routerinfo_is_a_configured_bridge(const routerinfo_t *ri);
|
||||
int node_is_a_configured_bridge(const node_t *node);
|
||||
void learned_router_identity(const tor_addr_t *addr, uint16_t port,
|
||||
const char *digest);
|
||||
struct bridge_line_t;
|
||||
void bridge_add_from_config(struct bridge_line_t *bridge_line);
|
||||
void retry_bridge_descriptor_fetch_directly(const char *digest);
|
||||
void fetch_bridge_descriptors(const or_options_t *options, time_t now);
|
||||
void learned_bridge_descriptor(routerinfo_t *ri, int from_cache);
|
||||
int any_bridge_descriptors_known(void);
|
||||
int entries_known_but_down(const or_options_t *options);
|
||||
void entries_retry_all(const or_options_t *options);
|
||||
|
||||
const smartlist_t *get_socks_args_by_bridge_addrport(const tor_addr_t *addr,
|
||||
uint16_t port);
|
||||
|
||||
int any_bridges_dont_support_microdescriptors(void);
|
||||
|
||||
void entry_guards_free_all(void);
|
||||
|
||||
const char *find_transport_name_by_bridge_addrport(const tor_addr_t *addr,
|
||||
uint16_t port);
|
||||
struct transport_t;
|
||||
int get_transport_by_bridge_addrport(const tor_addr_t *addr, uint16_t port,
|
||||
const struct transport_t **transport);
|
||||
|
||||
MOCK_DECL(int, transport_is_needed, (const char *transport_name));
|
||||
int validate_pluggable_transports_config(void);
|
||||
|
||||
double pathbias_get_close_success_count(entry_guard_t *guard);
|
||||
double pathbias_get_use_success_count(entry_guard_t *guard);
|
||||
|
||||
@ -275,9 +245,5 @@ guard_get_guardfraction_bandwidth(guardfraction_bandwidth_t *guardfraction_bw,
|
||||
int orig_bandwidth,
|
||||
uint32_t guardfraction_percentage);
|
||||
|
||||
MOCK_DECL(smartlist_t *, list_bridge_identities, (void));
|
||||
MOCK_DECL(download_status_t *, get_bridge_dl_status_by_id,
|
||||
(const char *digest));
|
||||
|
||||
#endif
|
||||
|
||||
|
@ -19,6 +19,7 @@ EXTRA_DIST+= src/or/ntmain.c src/or/Makefile.nmake
|
||||
|
||||
LIBTOR_A_SOURCES = \
|
||||
src/or/addressmap.c \
|
||||
src/or/bridges.c \
|
||||
src/or/buffers.c \
|
||||
src/or/channel.c \
|
||||
src/or/channeltls.c \
|
||||
@ -130,6 +131,7 @@ endif
|
||||
|
||||
ORHEADERS = \
|
||||
src/or/addressmap.h \
|
||||
src/or/bridges.h \
|
||||
src/or/buffers.h \
|
||||
src/or/channel.h \
|
||||
src/or/channeltls.h \
|
||||
|
@ -50,6 +50,7 @@
|
||||
#include "or.h"
|
||||
#include "addressmap.h"
|
||||
#include "backtrace.h"
|
||||
#include "bridges.h"
|
||||
#include "buffers.h"
|
||||
#include "channel.h"
|
||||
#include "channeltls.h"
|
||||
@ -3114,6 +3115,7 @@ tor_free_all(int postfork)
|
||||
control_free_all();
|
||||
sandbox_free_getaddrinfo_cache();
|
||||
protover_free_all();
|
||||
bridges_free_all();
|
||||
if (!postfork) {
|
||||
config_free_all();
|
||||
or_state_free_all();
|
||||
|
@ -38,6 +38,7 @@
|
||||
|
||||
#define NETWORKSTATUS_PRIVATE
|
||||
#include "or.h"
|
||||
#include "bridges.h"
|
||||
#include "channel.h"
|
||||
#include "circuitmux.h"
|
||||
#include "circuitmux_ewma.h"
|
||||
|
@ -93,6 +93,7 @@
|
||||
#define ROUTERLIST_PRIVATE
|
||||
#include "or.h"
|
||||
#include "backtrace.h"
|
||||
#include "bridges.h"
|
||||
#include "crypto_ed25519.h"
|
||||
#include "circuitstats.h"
|
||||
#include "config.h"
|
||||
|
@ -91,13 +91,13 @@
|
||||
|
||||
#define PT_PRIVATE
|
||||
#include "or.h"
|
||||
#include "bridges.h"
|
||||
#include "config.h"
|
||||
#include "circuitbuild.h"
|
||||
#include "transports.h"
|
||||
#include "util.h"
|
||||
#include "router.h"
|
||||
#include "statefile.h"
|
||||
#include "entrynodes.h"
|
||||
#include "connection_or.h"
|
||||
#include "ext_orport.h"
|
||||
#include "control.h"
|
||||
|
@ -11,6 +11,7 @@
|
||||
#include "or.h"
|
||||
#include "address.h"
|
||||
#include "addressmap.h"
|
||||
#include "bridges.h"
|
||||
#include "circuitmux_ewma.h"
|
||||
#include "circuitbuild.h"
|
||||
#include "config.h"
|
||||
|
@ -3,6 +3,7 @@
|
||||
|
||||
#define CONTROL_PRIVATE
|
||||
#include "or.h"
|
||||
#include "bridges.h"
|
||||
#include "control.h"
|
||||
#include "entrynodes.h"
|
||||
#include "networkstatus.h"
|
||||
|
Loading…
Reference in New Issue
Block a user