Tor  0.4.6.0-alpha-dev
routerlist.c
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1 /* Copyright (c) 2001 Matej Pfajfar.
2  * Copyright (c) 2001-2004, Roger Dingledine.
3  * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
4  * Copyright (c) 2007-2020, The Tor Project, Inc. */
5 /* See LICENSE for licensing information */
6 
7 /**
8  * \file routerlist.c
9  * \brief Code to
10  * maintain and access the global list of routerinfos for known
11  * servers.
12  *
13  * A "routerinfo_t" object represents a single self-signed router
14  * descriptor, as generated by a Tor relay in order to tell the rest of
15  * the world about its keys, address, and capabilities. An
16  * "extrainfo_t" object represents an adjunct "extra-info" object,
17  * certified by a corresponding router descriptor, reporting more
18  * information about the relay that nearly all users will not need.
19  *
20  * Most users will not use router descriptors for most relays. Instead,
21  * they use the information in microdescriptors and in the consensus
22  * networkstatus.
23  *
24  * Right now, routerinfo_t objects are used in these ways:
25  * <ul>
26  * <li>By clients, in order to learn about bridge keys and capabilities.
27  * (Bridges aren't listed in the consensus networkstatus, so they
28  * can't have microdescriptors.)
29  * <li>By relays, since relays want more information about other relays
30  * than they can learn from microdescriptors. (TODO: Is this still true?)
31  * <li>By authorities, which receive them and use them to generate the
32  * consensus and the microdescriptors.
33  * <li>By all directory caches, which download them in case somebody
34  * else wants them.
35  * </ul>
36  *
37  * Routerinfos are mostly created by parsing them from a string, in
38  * routerparse.c. We store them to disk on receiving them, and
39  * periodically discard the ones we don't need. On restarting, we
40  * re-read them from disk. (This also applies to extrainfo documents, if
41  * we are configured to fetch them.)
42  *
43  * In order to keep our list of routerinfos up-to-date, we periodically
44  * check whether there are any listed in the latest consensus (or in the
45  * votes from other authorities, if we are an authority) that we don't
46  * have. (This also applies to extrainfo documents, if we are
47  * configured to fetch them.)
48  *
49  * Almost nothing in Tor should use a routerinfo_t to refer directly to
50  * a relay; instead, almost everything should use node_t (implemented in
51  * nodelist.c), which provides a common interface to routerinfo_t,
52  * routerstatus_t, and microdescriptor_t.
53  *
54  * <br>
55  *
56  * This module also has some of the functions used for choosing random
57  * nodes according to different rules and weights. Historically, they
58  * were all in this module. Now, they are spread across this module,
59  * nodelist.c, and networkstatus.c. (TODO: Fix that.)
60  **/
61 
62 #define ROUTERLIST_PRIVATE
63 #include "core/or/or.h"
64 
65 #include "app/config/config.h"
67 #include "core/mainloop/mainloop.h"
68 #include "core/or/circuitlist.h"
69 #include "core/or/circuituse.h"
70 #include "core/or/extendinfo.h"
71 #include "core/or/policies.h"
72 #include "feature/client/bridges.h"
96 #include "feature/stats/rephist.h"
99 
110 
111 #include "lib/crypt_ops/digestset.h"
112 
113 #ifdef HAVE_SYS_STAT_H
114 #include <sys/stat.h>
115 #endif
116 
117 // #define DEBUG_ROUTERLIST
118 
119 /****************************************************************************/
120 
121 /* Typed wrappers for different digestmap types; used to avoid type
122  * confusion. */
123 
124 DECLARE_TYPED_DIGESTMAP_FNS(sdmap, digest_sd_map_t, signed_descriptor_t)
125 DECLARE_TYPED_DIGESTMAP_FNS(rimap, digest_ri_map_t, routerinfo_t)
126 DECLARE_TYPED_DIGESTMAP_FNS(eimap, digest_ei_map_t, extrainfo_t)
127 #define SDMAP_FOREACH(map, keyvar, valvar) \
128  DIGESTMAP_FOREACH(sdmap_to_digestmap(map), keyvar, signed_descriptor_t *, \
129  valvar)
130 #define RIMAP_FOREACH(map, keyvar, valvar) \
131  DIGESTMAP_FOREACH(rimap_to_digestmap(map), keyvar, routerinfo_t *, valvar)
132 #define EIMAP_FOREACH(map, keyvar, valvar) \
133  DIGESTMAP_FOREACH(eimap_to_digestmap(map), keyvar, extrainfo_t *, valvar)
134 #define eimap_free(map, fn) MAP_FREE_AND_NULL(eimap, (map), (fn))
135 #define rimap_free(map, fn) MAP_FREE_AND_NULL(rimap, (map), (fn))
136 #define sdmap_free(map, fn) MAP_FREE_AND_NULL(sdmap, (map), (fn))
137 
138 /* static function prototypes */
140 static const char *signed_descriptor_get_body_impl(
141  const signed_descriptor_t *desc,
142  int with_annotations);
143 
144 /****************************************************************************/
145 
146 /** Global list of all of the routers that we know about. */
147 static routerlist_t *routerlist = NULL;
148 
149 /** List of strings for nicknames we've already warned about and that are
150  * still unknown / unavailable. */
152 
153 /** The last time we tried to download any routerdesc, or 0 for "never". We
154  * use this to rate-limit download attempts when the number of routerdescs to
155  * download is low. */
157 
158 /* Router descriptor storage.
159  *
160  * Routerdescs are stored in a big file, named "cached-descriptors". As new
161  * routerdescs arrive, we append them to a journal file named
162  * "cached-descriptors.new".
163  *
164  * From time to time, we replace "cached-descriptors" with a new file
165  * containing only the live, non-superseded descriptors, and clear
166  * cached-descriptors.new.
167  *
168  * On startup, we read both files.
169  */
170 
171 /** Helper: return 1 iff the router log is so big we want to rebuild the
172  * store. */
173 static int
175 {
176  if (store->store_len > (1<<16))
177  return (store->journal_len > store->store_len / 2 ||
178  store->bytes_dropped > store->store_len / 2);
179  else
180  return store->journal_len > (1<<15);
181 }
182 
183 /** Return the desc_store_t in <b>rl</b> that should be used to store
184  * <b>sd</b>. */
185 static inline desc_store_t *
187 {
188  if (sd->is_extrainfo)
189  return &rl->extrainfo_store;
190  else
191  return &rl->desc_store;
192 }
193 
194 /** Add the signed_descriptor_t in <b>desc</b> to the router
195  * journal; change its saved_location to SAVED_IN_JOURNAL and set its
196  * offset appropriately. */
197 static int
199  desc_store_t *store)
200 {
201  char *fname = get_cachedir_fname_suffix(store->fname_base, ".new");
202  const char *body = signed_descriptor_get_body_impl(desc,1);
203  size_t len = desc->signed_descriptor_len + desc->annotations_len;
204 
205  if (append_bytes_to_file(fname, body, len, 1)) {
206  log_warn(LD_FS, "Unable to store router descriptor");
207  tor_free(fname);
208  return -1;
209  }
211  tor_free(fname);
212 
213  desc->saved_offset = store->journal_len;
214  store->journal_len += len;
215 
216  return 0;
217 }
218 
219 /** Sorting helper: return &lt;0, 0, or &gt;0 depending on whether the
220  * signed_descriptor_t* in *<b>a</b> is older, the same age as, or newer than
221  * the signed_descriptor_t* in *<b>b</b>. */
222 static int
223 compare_signed_descriptors_by_age_(const void **_a, const void **_b)
224 {
225  const signed_descriptor_t *r1 = *_a, *r2 = *_b;
226  return (int)(r1->published_on - r2->published_on);
227 }
228 
229 #define RRS_FORCE 1
230 #define RRS_DONT_REMOVE_OLD 2
231 
232 /** If the journal of <b>store</b> is too long, or if RRS_FORCE is set in
233  * <b>flags</b>, then atomically replace the saved router store with the
234  * routers currently in our routerlist, and clear the journal. Unless
235  * RRS_DONT_REMOVE_OLD is set in <b>flags</b>, delete expired routers before
236  * rebuilding the store. Return 0 on success, -1 on failure.
237  */
238 static int
240 {
241  smartlist_t *chunk_list = NULL;
242  char *fname = NULL, *fname_tmp = NULL;
243  int r = -1;
244  off_t offset = 0;
245  smartlist_t *signed_descriptors = NULL;
246  int nocache=0;
247  size_t total_expected_len = 0;
248  int had_any;
249  int force = flags & RRS_FORCE;
250 
251  if (!force && !router_should_rebuild_store(store)) {
252  r = 0;
253  goto done;
254  }
255  if (!routerlist) {
256  r = 0;
257  goto done;
258  }
259 
260  if (store->type == EXTRAINFO_STORE)
261  had_any = !eimap_isempty(routerlist->extra_info_map);
262  else
263  had_any = (smartlist_len(routerlist->routers)+
264  smartlist_len(routerlist->old_routers))>0;
265 
266  /* Don't save deadweight. */
267  if (!(flags & RRS_DONT_REMOVE_OLD))
269 
270  log_info(LD_DIR, "Rebuilding %s cache", store->description);
271 
272  fname = get_cachedir_fname(store->fname_base);
273  fname_tmp = get_cachedir_fname_suffix(store->fname_base, ".tmp");
274 
275  chunk_list = smartlist_new();
276 
277  /* We sort the routers by age to enhance locality on disk. */
278  signed_descriptors = smartlist_new();
279  if (store->type == EXTRAINFO_STORE) {
280  eimap_iter_t *iter;
281  for (iter = eimap_iter_init(routerlist->extra_info_map);
282  !eimap_iter_done(iter);
283  iter = eimap_iter_next(routerlist->extra_info_map, iter)) {
284  const char *key;
285  extrainfo_t *ei;
286  eimap_iter_get(iter, &key, &ei);
287  smartlist_add(signed_descriptors, &ei->cache_info);
288  }
289  } else {
291  smartlist_add(signed_descriptors, sd));
293  smartlist_add(signed_descriptors, &ri->cache_info));
294  }
295 
297 
298  /* Now, add the appropriate members to chunk_list */
299  SMARTLIST_FOREACH_BEGIN(signed_descriptors, signed_descriptor_t *, sd) {
300  sized_chunk_t *c;
301  const char *body = signed_descriptor_get_body_impl(sd, 1);
302  if (!body) {
303  log_warn(LD_BUG, "No descriptor available for router.");
304  goto done;
305  }
306  if (sd->do_not_cache) {
307  ++nocache;
308  continue;
309  }
310  c = tor_malloc(sizeof(sized_chunk_t));
311  c->bytes = body;
312  c->len = sd->signed_descriptor_len + sd->annotations_len;
313  total_expected_len += c->len;
314  smartlist_add(chunk_list, c);
315  } SMARTLIST_FOREACH_END(sd);
316 
317  if (write_chunks_to_file(fname_tmp, chunk_list, 1, 1)<0) {
318  log_warn(LD_FS, "Error writing router store to disk.");
319  goto done;
320  }
321 
322  /* Our mmap is now invalid. */
323  if (store->mmap) {
324  int res = tor_munmap_file(store->mmap);
325  store->mmap = NULL;
326  if (res != 0) {
327  log_warn(LD_FS, "Unable to munmap route store in %s", fname);
328  }
329  }
330 
331  if (replace_file(fname_tmp, fname)<0) {
332  log_warn(LD_FS, "Error replacing old router store: %s", strerror(errno));
333  goto done;
334  }
335 
336  errno = 0;
337  store->mmap = tor_mmap_file(fname);
338  if (! store->mmap) {
339  if (errno == ERANGE) {
340  /* empty store.*/
341  if (total_expected_len) {
342  log_warn(LD_FS, "We wrote some bytes to a new descriptor file at '%s',"
343  " but when we went to mmap it, it was empty!", fname);
344  } else if (had_any) {
345  log_info(LD_FS, "We just removed every descriptor in '%s'. This is "
346  "okay if we're just starting up after a long time. "
347  "Otherwise, it's a bug.", fname);
348  }
349  } else {
350  log_warn(LD_FS, "Unable to mmap new descriptor file at '%s'.",fname);
351  }
352  }
353 
354  log_info(LD_DIR, "Reconstructing pointers into cache");
355 
356  offset = 0;
357  SMARTLIST_FOREACH_BEGIN(signed_descriptors, signed_descriptor_t *, sd) {
358  if (sd->do_not_cache)
359  continue;
360  sd->saved_location = SAVED_IN_CACHE;
361  if (store->mmap) {
362  tor_free(sd->signed_descriptor_body); // sets it to null
363  sd->saved_offset = offset;
364  }
365  offset += sd->signed_descriptor_len + sd->annotations_len;
366  signed_descriptor_get_body(sd); /* reconstruct and assert */
367  } SMARTLIST_FOREACH_END(sd);
368 
369  tor_free(fname);
370  fname = get_cachedir_fname_suffix(store->fname_base, ".new");
371  write_str_to_file(fname, "", 1);
372 
373  r = 0;
374  store->store_len = (size_t) offset;
375  store->journal_len = 0;
376  store->bytes_dropped = 0;
377  done:
378  smartlist_free(signed_descriptors);
379  tor_free(fname);
380  tor_free(fname_tmp);
381  if (chunk_list) {
382  SMARTLIST_FOREACH(chunk_list, sized_chunk_t *, c, tor_free(c));
383  smartlist_free(chunk_list);
384  }
385 
386  return r;
387 }
388 
389 /** Helper: Reload a cache file and its associated journal, setting metadata
390  * appropriately. If <b>extrainfo</b> is true, reload the extrainfo store;
391  * else reload the router descriptor store. */
392 static int
394 {
395  char *fname = NULL, *contents = NULL;
396  struct stat st;
397  int extrainfo = (store->type == EXTRAINFO_STORE);
398  store->journal_len = store->store_len = 0;
399 
400  fname = get_cachedir_fname(store->fname_base);
401 
402  if (store->mmap) {
403  /* get rid of it first */
404  int res = tor_munmap_file(store->mmap);
405  store->mmap = NULL;
406  if (res != 0) {
407  log_warn(LD_FS, "Failed to munmap %s", fname);
408  tor_free(fname);
409  return -1;
410  }
411  }
412 
413  store->mmap = tor_mmap_file(fname);
414  if (store->mmap) {
415  store->store_len = store->mmap->size;
416  if (extrainfo)
418  store->mmap->data+store->mmap->size,
419  SAVED_IN_CACHE, NULL, 0);
420  else
422  store->mmap->data+store->mmap->size,
423  SAVED_IN_CACHE, NULL, 0, NULL);
424  }
425 
426  tor_free(fname);
427  fname = get_cachedir_fname_suffix(store->fname_base, ".new");
428  /* don't load empty files - we wouldn't get any data, even if we tried */
429  if (file_status(fname) == FN_FILE)
430  contents = read_file_to_str(fname, RFTS_BIN|RFTS_IGNORE_MISSING, &st);
431  if (contents) {
432  if (extrainfo)
434  NULL, 0);
435  else
437  NULL, 0, NULL);
438  store->journal_len = (size_t) st.st_size;
439  tor_free(contents);
440  }
441 
442  tor_free(fname);
443 
444  if (store->journal_len) {
445  /* Always clear the journal on startup.*/
446  router_rebuild_store(RRS_FORCE, store);
447  } else if (!extrainfo) {
448  /* Don't cache expired routers. (This is in an else because
449  * router_rebuild_store() also calls remove_old_routers().) */
451  }
452 
453  return 0;
454 }
455 
456 /** Load all cached router descriptors and extra-info documents from the
457  * store. Return 0 on success and -1 on failure.
458  */
459 int
461 {
464  return -1;
466  return -1;
467  return 0;
468 }
469 
470 /* When selecting a router for a direct connection, can OR address/port
471  * preference and reachability checks be skipped?
472  *
473  * Servers never check ReachableAddresses or ClientPreferIPv6. Returns
474  * true for servers.
475  *
476  * Otherwise, if <b>try_ip_pref</b> is true, returns false. Used to make
477  * clients check ClientPreferIPv6, even if ReachableAddresses is not set.
478  * Finally, return true if ReachableAddresses is set.
479  */
480 int
481 router_or_conn_should_skip_reachable_address_check(
482  const or_options_t *options,
483  int try_ip_pref)
484 {
485  /* Servers always have and prefer IPv4.
486  * And if clients are checking against the firewall for reachability only,
487  * but there's no firewall, don't bother checking */
488  return server_mode(options) || (!try_ip_pref && !firewall_is_fascist_or());
489 }
490 
491 /* When selecting a router for a direct connection, can Dir address/port
492  * and reachability checks be skipped?
493  *
494  * This function is obsolete, because clients only use ORPorts.
495  */
496 int
497 router_dir_conn_should_skip_reachable_address_check(
498  const or_options_t *options,
499  int try_ip_pref)
500 {
501  /* Servers always have and prefer IPv4.
502  * And if clients are checking against the firewall for reachability only,
503  * but there's no firewall, don't bother checking */
504  return server_mode(options) || (!try_ip_pref && !firewall_is_fascist_dir());
505 }
506 
507 /** Return true iff r1 and r2 have the same address and OR port. */
508 int
510 {
511  return tor_addr_eq(&r1->ipv4_addr, &r2->ipv4_addr) &&
512  r1->ipv4_orport == r2->ipv4_orport &&
513  tor_addr_eq(&r1->ipv6_addr, &r2->ipv6_addr) &&
514  r1->ipv6_orport == r2->ipv6_orport;
515 }
516 
517 /* Returns true if <b>node</b> can be chosen based on <b>flags</b>.
518  *
519  * The following conditions are applied to all nodes:
520  * - is running;
521  * - is valid;
522  * - supports EXTEND2 cells;
523  * - has an ntor circuit crypto key; and
524  * - does not allow single-hop exits.
525  *
526  * If the node has a routerinfo, we're checking for a direct connection, and
527  * we're using bridges, the following condition is applied:
528  * - has a bridge-purpose routerinfo;
529  * and for all other nodes:
530  * - has a general-purpose routerinfo (or no routerinfo).
531  *
532  * Nodes that don't have a routerinfo must be general-purpose nodes, because
533  * routerstatuses and microdescriptors only come via consensuses.
534  *
535  * The <b>flags</b> check that <b>node</b>:
536  * - <b>CRN_NEED_UPTIME</b>: has more than a minimum uptime;
537  * - <b>CRN_NEED_CAPACITY</b>: has more than a minimum capacity;
538  * - <b>CRN_NEED_GUARD</b>: is a Guard;
539  * - <b>CRN_NEED_DESC</b>: has a routerinfo or microdescriptor -- that is,
540  * enough info to be used to build a circuit;
541  * - <b>CRN_DIRECT_CONN</b>: is suitable for direct connections. Checks
542  * for the relevant descriptors. Checks the address
543  * against ReachableAddresses, ClientUseIPv4 0, and
544  * reachable_addr_use_ipv6() == 0);
545  * - <b>CRN_PREF_ADDR</b>: if we are connecting directly to the node, it has
546  * an address that is preferred by the
547  * ClientPreferIPv6ORPort setting;
548  * - <b>CRN_RENDEZVOUS_V3</b>: can become a v3 onion service rendezvous point;
549  * - <b>CRN_INITIATE_IPV6_EXTEND</b>: can initiate IPv6 extends.
550  */
551 bool
552 router_can_choose_node(const node_t *node, int flags)
553 {
554  /* The full set of flags used for node selection. */
555  const bool need_uptime = (flags & CRN_NEED_UPTIME) != 0;
556  const bool need_capacity = (flags & CRN_NEED_CAPACITY) != 0;
557  const bool need_guard = (flags & CRN_NEED_GUARD) != 0;
558  const bool need_desc = (flags & CRN_NEED_DESC) != 0;
559  const bool pref_addr = (flags & CRN_PREF_ADDR) != 0;
560  const bool direct_conn = (flags & CRN_DIRECT_CONN) != 0;
561  const bool rendezvous_v3 = (flags & CRN_RENDEZVOUS_V3) != 0;
562  const bool initiate_ipv6_extend = (flags & CRN_INITIATE_IPV6_EXTEND) != 0;
563 
564  const or_options_t *options = get_options();
565  const bool check_reach =
566  !router_or_conn_should_skip_reachable_address_check(options, pref_addr);
567  const bool direct_bridge = direct_conn && options->UseBridges;
568 
569  if (!node->is_running || !node->is_valid)
570  return false;
571  if (need_desc && !node_has_preferred_descriptor(node, direct_conn))
572  return false;
573  if (node->ri) {
574  if (direct_bridge && node->ri->purpose != ROUTER_PURPOSE_BRIDGE)
575  return false;
576  else if (node->ri->purpose != ROUTER_PURPOSE_GENERAL)
577  return false;
578  }
579  if (node_is_unreliable(node, need_uptime, need_capacity, need_guard))
580  return false;
581  /* Don't choose nodes if we are certain they can't do EXTEND2 cells */
582  if (node->rs && !routerstatus_version_supports_extend2_cells(node->rs, 1))
583  return false;
584  /* Don't choose nodes if we are certain they can't do ntor. */
585  if ((node->ri || node->md) && !node_has_curve25519_onion_key(node))
586  return false;
587  /* Exclude relays that allow single hop exit circuits. This is an
588  * obsolete option since 0.2.9.2-alpha and done by default in
589  * 0.3.1.0-alpha. */
591  return false;
592  /* Exclude relays that can not become a rendezvous for a hidden service
593  * version 3. */
594  if (rendezvous_v3 &&
596  return false;
597  /* Choose a node with an OR address that matches the firewall rules */
598  if (direct_conn && check_reach &&
600  FIREWALL_OR_CONNECTION,
601  pref_addr))
602  return false;
603  if (initiate_ipv6_extend && !node_supports_initiating_ipv6_extends(node))
604  return false;
605 
606  return true;
607 }
608 
609 /** Add every suitable node from our nodelist to <b>sl</b>, so that
610  * we can pick a node for a circuit based on <b>flags</b>.
611  *
612  * See router_can_choose_node() for details of <b>flags</b>.
613  */
614 void
616 {
618  if (!router_can_choose_node(node, flags))
619  continue;
620  smartlist_add(sl, (void *)node);
621  } SMARTLIST_FOREACH_END(node);
622 }
623 
624 /** Look through the routerlist until we find a router that has my key.
625  Return it. */
626 const routerinfo_t *
628 {
629  if (!routerlist)
630  return NULL;
631 
633  {
634  if (router_is_me(router))
635  return router;
636  });
637  return NULL;
638 }
639 
640 /** Return the smaller of the router's configured BandwidthRate
641  * and its advertised capacity. */
642 uint32_t
644 {
645  if (router->bandwidthcapacity < router->bandwidthrate)
646  return router->bandwidthcapacity;
647  return router->bandwidthrate;
648 }
649 
650 /** Do not weight any declared bandwidth more than this much when picking
651  * routers by bandwidth. */
652 #define DEFAULT_MAX_BELIEVABLE_BANDWIDTH 10000000 /* 10 MB/sec */
653 
654 /** Return the smaller of the router's configured BandwidthRate
655  * and its advertised capacity, capped by max-believe-bw. */
656 uint32_t
658 {
659  uint32_t result = router->bandwidthcapacity;
660  if (result > router->bandwidthrate)
661  result = router->bandwidthrate;
664  return result;
665 }
666 
667 /** Helper: given an extended nickname in <b>hexdigest</b> try to decode it.
668  * Return 0 on success, -1 on failure. Store the result into the
669  * DIGEST_LEN-byte buffer at <b>digest_out</b>, the single character at
670  * <b>nickname_qualifier_char_out</b>, and the MAXNICKNAME_LEN+1-byte buffer
671  * at <b>nickname_out</b>.
672  *
673  * The recognized format is:
674  * HexName = Dollar? HexDigest NamePart?
675  * Dollar = '?'
676  * HexDigest = HexChar*20
677  * HexChar = 'a'..'f' | 'A'..'F' | '0'..'9'
678  * NamePart = QualChar Name
679  * QualChar = '=' | '~'
680  * Name = NameChar*(1..MAX_NICKNAME_LEN)
681  * NameChar = Any ASCII alphanumeric character
682  */
683 int
684 hex_digest_nickname_decode(const char *hexdigest,
685  char *digest_out,
686  char *nickname_qualifier_char_out,
687  char *nickname_out)
688 {
689  size_t len;
690 
691  tor_assert(hexdigest);
692  if (hexdigest[0] == '$')
693  ++hexdigest;
694 
695  len = strlen(hexdigest);
696  if (len < HEX_DIGEST_LEN) {
697  return -1;
698  } else if (len > HEX_DIGEST_LEN && (hexdigest[HEX_DIGEST_LEN] == '=' ||
699  hexdigest[HEX_DIGEST_LEN] == '~') &&
700  len <= HEX_DIGEST_LEN+1+MAX_NICKNAME_LEN) {
701  *nickname_qualifier_char_out = hexdigest[HEX_DIGEST_LEN];
702  strlcpy(nickname_out, hexdigest+HEX_DIGEST_LEN+1 , MAX_NICKNAME_LEN+1);
703  } else if (len == HEX_DIGEST_LEN) {
704  ;
705  } else {
706  return -1;
707  }
708 
709  if (base16_decode(digest_out, DIGEST_LEN,
710  hexdigest, HEX_DIGEST_LEN) != DIGEST_LEN)
711  return -1;
712  return 0;
713 }
714 
715 /** Helper: Return true iff the <b>identity_digest</b> and <b>nickname</b>
716  * combination of a router, encoded in hexadecimal, matches <b>hexdigest</b>
717  * (which is optionally prefixed with a single dollar sign). Return false if
718  * <b>hexdigest</b> is malformed, or it doesn't match. */
719 int
720 hex_digest_nickname_matches(const char *hexdigest, const char *identity_digest,
721  const char *nickname)
722 {
723  char digest[DIGEST_LEN];
724  char nn_char='\0';
725  char nn_buf[MAX_NICKNAME_LEN+1];
726 
727  if (hex_digest_nickname_decode(hexdigest, digest, &nn_char, nn_buf) == -1)
728  return 0;
729 
730  if (nn_char == '=') {
731  return 0;
732  }
733 
734  if (nn_char == '~') {
735  if (!nickname) // XXX This seems wrong. -NM
736  return 0;
737  if (strcasecmp(nn_buf, nickname))
738  return 0;
739  }
740 
741  return tor_memeq(digest, identity_digest, DIGEST_LEN);
742 }
743 
744 /** If hexdigest is correctly formed, base16_decode it into
745  * digest, which must have DIGEST_LEN space in it.
746  * Return 0 on success, -1 on failure.
747  */
748 int
749 hexdigest_to_digest(const char *hexdigest, char *digest)
750 {
751  if (hexdigest[0]=='$')
752  ++hexdigest;
753  if (strlen(hexdigest) < HEX_DIGEST_LEN ||
754  base16_decode(digest,DIGEST_LEN,hexdigest,HEX_DIGEST_LEN) != DIGEST_LEN)
755  return -1;
756  return 0;
757 }
758 
759 /** As router_get_by_id_digest,but return a pointer that you're allowed to
760  * modify */
761 routerinfo_t *
762 router_get_mutable_by_digest(const char *digest)
763 {
764  tor_assert(digest);
765 
766  if (!routerlist) return NULL;
767 
768  // routerlist_assert_ok(routerlist);
769 
770  return rimap_get(routerlist->identity_map, digest);
771 }
772 
773 /** Return the router in our routerlist whose 20-byte key digest
774  * is <b>digest</b>. Return NULL if no such router is known. */
775 const routerinfo_t *
776 router_get_by_id_digest(const char *digest)
777 {
778  return router_get_mutable_by_digest(digest);
779 }
780 
781 /** Return the router in our routerlist whose 20-byte descriptor
782  * is <b>digest</b>. Return NULL if no such router is known. */
785 {
786  tor_assert(digest);
787 
788  if (!routerlist) return NULL;
789 
790  return sdmap_get(routerlist->desc_digest_map, digest);
791 }
792 
793 /** Return the signed descriptor for the router in our routerlist whose
794  * 20-byte extra-info digest is <b>digest</b>. Return NULL if no such router
795  * is known. */
797 router_get_by_extrainfo_digest,(const char *digest))
798 {
799  tor_assert(digest);
800 
801  if (!routerlist) return NULL;
802 
803  return sdmap_get(routerlist->desc_by_eid_map, digest);
804 }
805 
806 /** Return the signed descriptor for the extrainfo_t in our routerlist whose
807  * extra-info-digest is <b>digest</b>. Return NULL if no such extra-info
808  * document is known. */
811 {
812  extrainfo_t *ei;
813  tor_assert(digest);
814  if (!routerlist) return NULL;
815  ei = eimap_get(routerlist->extra_info_map, digest);
816  return ei ? &ei->cache_info : NULL;
817 }
818 
819 /** Return a pointer to the signed textual representation of a descriptor.
820  * The returned string is not guaranteed to be NUL-terminated: the string's
821  * length will be in desc->signed_descriptor_len.
822  *
823  * If <b>with_annotations</b> is set, the returned string will include
824  * the annotations
825  * (if any) preceding the descriptor. This will increase the length of the
826  * string by desc->annotations_len.
827  *
828  * The caller must not free the string returned.
829  */
830 static const char *
832  int with_annotations)
833 {
834  const char *r = NULL;
835  size_t len = desc->signed_descriptor_len;
836  off_t offset = desc->saved_offset;
837  if (with_annotations)
838  len += desc->annotations_len;
839  else
840  offset += desc->annotations_len;
841 
842  tor_assert(len > 32);
843  if (desc->saved_location == SAVED_IN_CACHE && routerlist) {
845  if (store && store->mmap) {
846  tor_assert(desc->saved_offset + len <= store->mmap->size);
847  r = store->mmap->data + offset;
848  } else if (store) {
849  log_err(LD_DIR, "We couldn't read a descriptor that is supposedly "
850  "mmaped in our cache. Is another process running in our data "
851  "directory? Exiting.");
852  exit(1); // XXXX bad exit: should recover.
853  }
854  }
855  if (!r) /* no mmap, or not in cache. */
856  r = desc->signed_descriptor_body +
857  (with_annotations ? 0 : desc->annotations_len);
858 
859  tor_assert(r);
860  if (!with_annotations) {
861  if (fast_memcmp("router ", r, 7) && fast_memcmp("extra-info ", r, 11)) {
862  char *cp = tor_strndup(r, 64);
863  log_err(LD_DIR, "descriptor at %p begins with unexpected string %s. "
864  "Is another process running in our data directory? Exiting.",
865  desc, escaped(cp));
866  exit(1); // XXXX bad exit: should recover.
867  }
868  }
869 
870  return r;
871 }
872 
873 /** Return a pointer to the signed textual representation of a descriptor.
874  * The returned string is not guaranteed to be NUL-terminated: the string's
875  * length will be in desc->signed_descriptor_len.
876  *
877  * The caller must not free the string returned.
878  */
879 const char *
881 {
882  return signed_descriptor_get_body_impl(desc, 0);
883 }
884 
885 /** As signed_descriptor_get_body(), but points to the beginning of the
886  * annotations section rather than the beginning of the descriptor. */
887 const char *
889 {
890  return signed_descriptor_get_body_impl(desc, 1);
891 }
892 
893 /** Return the current list of all known routers. */
894 routerlist_t *
896 {
897  if (PREDICT_UNLIKELY(!routerlist)) {
898  routerlist = tor_malloc_zero(sizeof(routerlist_t));
901  routerlist->identity_map = rimap_new();
902  routerlist->desc_digest_map = sdmap_new();
903  routerlist->desc_by_eid_map = sdmap_new();
904  routerlist->extra_info_map = eimap_new();
905 
906  routerlist->desc_store.fname_base = "cached-descriptors";
907  routerlist->extrainfo_store.fname_base = "cached-extrainfo";
908 
909  routerlist->desc_store.type = ROUTER_STORE;
910  routerlist->extrainfo_store.type = EXTRAINFO_STORE;
911 
912  routerlist->desc_store.description = "router descriptors";
913  routerlist->extrainfo_store.description = "extra-info documents";
914  }
915  return routerlist;
916 }
917 
918 /** Free all storage held by <b>router</b>. */
919 void
921 {
922  if (!router)
923  return;
924 
925  tor_free(router->cache_info.signed_descriptor_body);
926  tor_free(router->nickname);
927  tor_free(router->platform);
928  tor_free(router->protocol_list);
929  tor_free(router->contact_info);
930  if (router->onion_pkey)
931  tor_free(router->onion_pkey);
933  if (router->identity_pkey)
934  crypto_pk_free(router->identity_pkey);
935  tor_cert_free(router->cache_info.signing_key_cert);
936  if (router->declared_family) {
937  SMARTLIST_FOREACH(router->declared_family, char *, s, tor_free(s));
938  smartlist_free(router->declared_family);
939  }
940  addr_policy_list_free(router->exit_policy);
941  short_policy_free(router->ipv6_exit_policy);
942 
943  memset(router, 77, sizeof(routerinfo_t));
944 
945  tor_free(router);
946 }
947 
948 /** Release all storage held by <b>extrainfo</b> */
949 void
951 {
952  if (!extrainfo)
953  return;
954  tor_cert_free(extrainfo->cache_info.signing_key_cert);
955  tor_free(extrainfo->cache_info.signed_descriptor_body);
956  tor_free(extrainfo->pending_sig);
957 
958  memset(extrainfo, 88, sizeof(extrainfo_t)); /* debug bad memory usage */
959  tor_free(extrainfo);
960 }
961 
962 #define signed_descriptor_free(val) \
963  FREE_AND_NULL(signed_descriptor_t, signed_descriptor_free_, (val))
964 
965 /** Release storage held by <b>sd</b>. */
966 static void
968 {
969  if (!sd)
970  return;
971 
973  tor_cert_free(sd->signing_key_cert);
974 
975  memset(sd, 99, sizeof(signed_descriptor_t)); /* Debug bad mem usage */
976  tor_free(sd);
977 }
978 
979 /** Reset the given signed descriptor <b>sd</b> by freeing the allocated
980  * memory inside the object and by zeroing its content. */
981 static void
983 {
984  tor_assert(sd);
986  tor_cert_free(sd->signing_key_cert);
987  memset(sd, 0, sizeof(*sd));
988 }
989 
990 /** Copy src into dest, and steal all references inside src so that when
991  * we free src, we don't mess up dest. */
992 static void
994  signed_descriptor_t *src)
995 {
996  tor_assert(dest != src);
997  /* Cleanup destination object before overwriting it.*/
999  memcpy(dest, src, sizeof(signed_descriptor_t));
1000  src->signed_descriptor_body = NULL;
1001  src->signing_key_cert = NULL;
1002  dest->routerlist_index = -1;
1003 }
1004 
1005 /** Extract a signed_descriptor_t from a general routerinfo, and free the
1006  * routerinfo.
1007  */
1008 static signed_descriptor_t *
1010 {
1011  signed_descriptor_t *sd;
1013  sd = tor_malloc_zero(sizeof(signed_descriptor_t));
1014  signed_descriptor_move(sd, &ri->cache_info);
1015  routerinfo_free(ri);
1016  return sd;
1017 }
1018 
1019 /** Helper: free the storage held by the extrainfo_t in <b>e</b>. */
1020 static void
1022 {
1023  extrainfo_free_(e);
1024 }
1025 
1026 /** Free all storage held by a routerlist <b>rl</b>. */
1027 void
1029 {
1030  if (!rl)
1031  return;
1032  rimap_free(rl->identity_map, NULL);
1033  sdmap_free(rl->desc_digest_map, NULL);
1034  sdmap_free(rl->desc_by_eid_map, NULL);
1035  eimap_free(rl->extra_info_map, extrainfo_free_void);
1037  routerinfo_free(r));
1039  signed_descriptor_free(sd));
1040  smartlist_free(rl->routers);
1041  smartlist_free(rl->old_routers);
1042  if (rl->desc_store.mmap) {
1043  int res = tor_munmap_file(rl->desc_store.mmap);
1044  if (res != 0) {
1045  log_warn(LD_FS, "Failed to munmap routerlist->desc_store.mmap");
1046  }
1047  }
1048  if (rl->extrainfo_store.mmap) {
1049  int res = tor_munmap_file(rl->extrainfo_store.mmap);
1050  if (res != 0) {
1051  log_warn(LD_FS, "Failed to munmap routerlist->extrainfo_store.mmap");
1052  }
1053  }
1054  tor_free(rl);
1055 }
1056 
1057 /** Log information about how much memory is being used for routerlist,
1058  * at log level <b>severity</b>. */
1059 void
1061 {
1062  uint64_t livedescs = 0;
1063  uint64_t olddescs = 0;
1064  if (!routerlist)
1065  return;
1067  livedescs += r->cache_info.signed_descriptor_len);
1069  olddescs += sd->signed_descriptor_len);
1070 
1071  tor_log(severity, LD_DIR,
1072  "In %d live descriptors: %"PRIu64" bytes. "
1073  "In %d old descriptors: %"PRIu64" bytes.",
1074  smartlist_len(routerlist->routers), (livedescs),
1075  smartlist_len(routerlist->old_routers), (olddescs));
1076 }
1077 
1078 /** Debugging helper: If <b>idx</b> is nonnegative, assert that <b>ri</b> is
1079  * in <b>sl</b> at position <b>idx</b>. Otherwise, search <b>sl</b> for
1080  * <b>ri</b>. Return the index of <b>ri</b> in <b>sl</b>, or -1 if <b>ri</b>
1081  * is not in <b>sl</b>. */
1082 static inline int
1083 routerlist_find_elt_(smartlist_t *sl, void *ri, int idx)
1084 {
1085  if (idx < 0) {
1086  idx = -1;
1088  if (r == ri) {
1089  idx = r_sl_idx;
1090  break;
1091  });
1092  } else {
1093  tor_assert(idx < smartlist_len(sl));
1094  tor_assert(smartlist_get(sl, idx) == ri);
1095  };
1096  return idx;
1097 }
1098 
1099 /** Insert an item <b>ri</b> into the routerlist <b>rl</b>, updating indices
1100  * as needed. There must be no previous member of <b>rl</b> with the same
1101  * identity digest as <b>ri</b>: If there is, call routerlist_replace
1102  * instead.
1103  */
1104 static void
1106 {
1107  routerinfo_t *ri_old;
1108  signed_descriptor_t *sd_old;
1109  {
1110  const routerinfo_t *ri_generated = router_get_my_routerinfo();
1111  tor_assert(ri_generated != ri);
1112  }
1113  tor_assert(ri->cache_info.routerlist_index == -1);
1114 
1115  ri_old = rimap_set(rl->identity_map, ri->cache_info.identity_digest, ri);
1116  tor_assert(!ri_old);
1117 
1118  sd_old = sdmap_set(rl->desc_digest_map,
1119  ri->cache_info.signed_descriptor_digest,
1120  &(ri->cache_info));
1121  if (sd_old) {
1122  int idx = sd_old->routerlist_index;
1123  sd_old->routerlist_index = -1;
1124  smartlist_del(rl->old_routers, idx);
1125  if (idx < smartlist_len(rl->old_routers)) {
1126  signed_descriptor_t *d = smartlist_get(rl->old_routers, idx);
1127  d->routerlist_index = idx;
1128  }
1130  sdmap_remove(rl->desc_by_eid_map, sd_old->extra_info_digest);
1131  signed_descriptor_free(sd_old);
1132  }
1133 
1134  if (!tor_digest_is_zero(ri->cache_info.extra_info_digest))
1135  sdmap_set(rl->desc_by_eid_map, ri->cache_info.extra_info_digest,
1136  &ri->cache_info);
1137  smartlist_add(rl->routers, ri);
1138  ri->cache_info.routerlist_index = smartlist_len(rl->routers) - 1;
1139  nodelist_set_routerinfo(ri, NULL);
1141 #ifdef DEBUG_ROUTERLIST
1143 #endif
1144 }
1145 
1146 /** Adds the extrainfo_t <b>ei</b> to the routerlist <b>rl</b>, if there is a
1147  * corresponding router in rl->routers or rl->old_routers. Return the status
1148  * of inserting <b>ei</b>. Free <b>ei</b> if it isn't inserted. */
1150 extrainfo_insert,(routerlist_t *rl, extrainfo_t *ei, int warn_if_incompatible))
1151 {
1153  const char *compatibility_error_msg;
1154  routerinfo_t *ri = rimap_get(rl->identity_map,
1155  ei->cache_info.identity_digest);
1156  signed_descriptor_t *sd =
1157  sdmap_get(rl->desc_by_eid_map, ei->cache_info.signed_descriptor_digest);
1158  extrainfo_t *ei_tmp;
1159  const int severity = warn_if_incompatible ? LOG_WARN : LOG_INFO;
1160 
1161  {
1162  extrainfo_t *ei_generated = router_get_my_extrainfo();
1163  tor_assert(ei_generated != ei);
1164  }
1165 
1166  if (!ri) {
1167  /* This router is unknown; we can't even verify the signature. Give up.*/
1168  r = ROUTER_NOT_IN_CONSENSUS;
1169  goto done;
1170  }
1171  if (! sd) {
1172  /* The extrainfo router doesn't have a known routerdesc to attach it to.
1173  * This just won't work. */;
1174  static ratelim_t no_sd_ratelim = RATELIM_INIT(1800);
1175  r = ROUTER_BAD_EI;
1176  /* This is a DEBUG because it can happen naturally, if we tried
1177  * to add an extrainfo for which we no longer have the
1178  * corresponding routerinfo.
1179  */
1180  log_fn_ratelim(&no_sd_ratelim, LOG_DEBUG, LD_DIR,
1181  "No entry found in extrainfo map.");
1182  goto done;
1183  }
1184  if (tor_memneq(ei->cache_info.signed_descriptor_digest,
1185  sd->extra_info_digest, DIGEST_LEN)) {
1186  static ratelim_t digest_mismatch_ratelim = RATELIM_INIT(1800);
1187  /* The sd we got from the map doesn't match the digest we used to look
1188  * it up. This makes no sense. */
1189  r = ROUTER_BAD_EI;
1190  log_fn_ratelim(&digest_mismatch_ratelim, severity, LD_BUG,
1191  "Mismatch in digest in extrainfo map.");
1192  goto done;
1193  }
1195  &compatibility_error_msg)) {
1196  char d1[HEX_DIGEST_LEN+1], d2[HEX_DIGEST_LEN+1];
1197  r = (ri->cache_info.extrainfo_is_bogus) ?
1198  ROUTER_BAD_EI : ROUTER_NOT_IN_CONSENSUS;
1199 
1200  base16_encode(d1, sizeof(d1), ri->cache_info.identity_digest, DIGEST_LEN);
1201  base16_encode(d2, sizeof(d2), ei->cache_info.identity_digest, DIGEST_LEN);
1202 
1203  log_fn(severity,LD_DIR,
1204  "router info incompatible with extra info (ri id: %s, ei id %s, "
1205  "reason: %s)", d1, d2, compatibility_error_msg);
1206 
1207  goto done;
1208  }
1209 
1210  /* Okay, if we make it here, we definitely have a router corresponding to
1211  * this extrainfo. */
1212 
1213  ei_tmp = eimap_set(rl->extra_info_map,
1214  ei->cache_info.signed_descriptor_digest,
1215  ei);
1216  r = ROUTER_ADDED_SUCCESSFULLY;
1217  if (ei_tmp) {
1219  ei_tmp->cache_info.signed_descriptor_len;
1220  extrainfo_free(ei_tmp);
1221  }
1222 
1223  done:
1224  if (r != ROUTER_ADDED_SUCCESSFULLY)
1225  extrainfo_free(ei);
1226 
1227 #ifdef DEBUG_ROUTERLIST
1229 #endif
1230  return r;
1231 }
1232 
1233 #define should_cache_old_descriptors() \
1234  directory_caches_dir_info(get_options())
1235 
1236 /** If we're a directory cache and routerlist <b>rl</b> doesn't have
1237  * a copy of router <b>ri</b> yet, add it to the list of old (not
1238  * recommended but still served) descriptors. Else free it. */
1239 static void
1241 {
1242  {
1243  const routerinfo_t *ri_generated = router_get_my_routerinfo();
1244  tor_assert(ri_generated != ri);
1245  }
1246  tor_assert(ri->cache_info.routerlist_index == -1);
1247 
1248  if (should_cache_old_descriptors() &&
1250  !sdmap_get(rl->desc_digest_map,
1251  ri->cache_info.signed_descriptor_digest)) {
1253  sdmap_set(rl->desc_digest_map, sd->signed_descriptor_digest, sd);
1254  smartlist_add(rl->old_routers, sd);
1255  sd->routerlist_index = smartlist_len(rl->old_routers)-1;
1257  sdmap_set(rl->desc_by_eid_map, sd->extra_info_digest, sd);
1258  } else {
1259  routerinfo_free(ri);
1260  }
1261 #ifdef DEBUG_ROUTERLIST
1263 #endif
1264 }
1265 
1266 /** Remove an item <b>ri</b> from the routerlist <b>rl</b>, updating indices
1267  * as needed. If <b>idx</b> is nonnegative and smartlist_get(rl-&gt;routers,
1268  * idx) == ri, we don't need to do a linear search over the list to decide
1269  * which to remove. We fill the gap in rl-&gt;routers with a later element in
1270  * the list, if any exists. <b>ri</b> is freed.
1271  *
1272  * If <b>make_old</b> is true, instead of deleting the router, we try adding
1273  * it to rl-&gt;old_routers. */
1274 void
1275 routerlist_remove(routerlist_t *rl, routerinfo_t *ri, int make_old, time_t now)
1276 {
1277  routerinfo_t *ri_tmp;
1278  extrainfo_t *ei_tmp;
1279  int idx = ri->cache_info.routerlist_index;
1280  tor_assert(0 <= idx && idx < smartlist_len(rl->routers));
1281  tor_assert(smartlist_get(rl->routers, idx) == ri);
1282 
1284 
1285  /* make sure the rephist module knows that it's not running */
1287 
1288  ri->cache_info.routerlist_index = -1;
1289  smartlist_del(rl->routers, idx);
1290  if (idx < smartlist_len(rl->routers)) {
1291  routerinfo_t *r = smartlist_get(rl->routers, idx);
1292  r->cache_info.routerlist_index = idx;
1293  }
1294 
1295  ri_tmp = rimap_remove(rl->identity_map, ri->cache_info.identity_digest);
1297  tor_assert(ri_tmp == ri);
1298 
1299  if (make_old && should_cache_old_descriptors() &&
1301  signed_descriptor_t *sd;
1303  smartlist_add(rl->old_routers, sd);
1304  sd->routerlist_index = smartlist_len(rl->old_routers)-1;
1305  sdmap_set(rl->desc_digest_map, sd->signed_descriptor_digest, sd);
1307  sdmap_set(rl->desc_by_eid_map, sd->extra_info_digest, sd);
1308  } else {
1309  signed_descriptor_t *sd_tmp;
1310  sd_tmp = sdmap_remove(rl->desc_digest_map,
1311  ri->cache_info.signed_descriptor_digest);
1312  tor_assert(sd_tmp == &(ri->cache_info));
1313  rl->desc_store.bytes_dropped += ri->cache_info.signed_descriptor_len;
1314  ei_tmp = eimap_remove(rl->extra_info_map,
1315  ri->cache_info.extra_info_digest);
1316  if (ei_tmp) {
1318  ei_tmp->cache_info.signed_descriptor_len;
1319  extrainfo_free(ei_tmp);
1320  }
1321  if (!tor_digest_is_zero(ri->cache_info.extra_info_digest))
1322  sdmap_remove(rl->desc_by_eid_map, ri->cache_info.extra_info_digest);
1323  routerinfo_free(ri);
1324  }
1325 #ifdef DEBUG_ROUTERLIST
1327 #endif
1328 }
1329 
1330 /** Remove a signed_descriptor_t <b>sd</b> from <b>rl</b>->old_routers, and
1331  * adjust <b>rl</b> as appropriate. <b>idx</b> is -1, or the index of
1332  * <b>sd</b>. */
1333 static void
1335 {
1336  signed_descriptor_t *sd_tmp;
1337  extrainfo_t *ei_tmp;
1338  desc_store_t *store;
1339  if (idx == -1) {
1340  idx = sd->routerlist_index;
1341  }
1342  tor_assert(0 <= idx && idx < smartlist_len(rl->old_routers));
1343  /* XXXX edmanm's bridge relay triggered the following assert while
1344  * running 0.2.0.12-alpha. If anybody triggers this again, see if we
1345  * can get a backtrace. */
1346  tor_assert(smartlist_get(rl->old_routers, idx) == sd);
1347  tor_assert(idx == sd->routerlist_index);
1348 
1349  sd->routerlist_index = -1;
1350  smartlist_del(rl->old_routers, idx);
1351  if (idx < smartlist_len(rl->old_routers)) {
1352  signed_descriptor_t *d = smartlist_get(rl->old_routers, idx);
1353  d->routerlist_index = idx;
1354  }
1355  sd_tmp = sdmap_remove(rl->desc_digest_map,
1357  tor_assert(sd_tmp == sd);
1358  store = desc_get_store(rl, sd);
1359  if (store)
1360  store->bytes_dropped += sd->signed_descriptor_len;
1361 
1362  ei_tmp = eimap_remove(rl->extra_info_map,
1363  sd->extra_info_digest);
1364  if (ei_tmp) {
1366  ei_tmp->cache_info.signed_descriptor_len;
1367  extrainfo_free(ei_tmp);
1368  }
1370  sdmap_remove(rl->desc_by_eid_map, sd->extra_info_digest);
1371 
1372  signed_descriptor_free(sd);
1373 #ifdef DEBUG_ROUTERLIST
1375 #endif
1376 }
1377 
1378 /** Remove <b>ri_old</b> from the routerlist <b>rl</b>, and replace it with
1379  * <b>ri_new</b>, updating all index info. If <b>idx</b> is nonnegative and
1380  * smartlist_get(rl-&gt;routers, idx) == ri, we don't need to do a linear
1381  * search over the list to decide which to remove. We put ri_new in the same
1382  * index as ri_old, if possible. ri is freed as appropriate.
1383  *
1384  * If should_cache_descriptors() is true, instead of deleting the router,
1385  * we add it to rl-&gt;old_routers. */
1386 static void
1388  routerinfo_t *ri_new)
1389 {
1390  int idx;
1391  int same_descriptors;
1392 
1393  routerinfo_t *ri_tmp;
1394  extrainfo_t *ei_tmp;
1395  {
1396  const routerinfo_t *ri_generated = router_get_my_routerinfo();
1397  tor_assert(ri_generated != ri_new);
1398  }
1399  tor_assert(ri_old != ri_new);
1400  tor_assert(ri_new->cache_info.routerlist_index == -1);
1401 
1402  idx = ri_old->cache_info.routerlist_index;
1403  tor_assert(0 <= idx && idx < smartlist_len(rl->routers));
1404  tor_assert(smartlist_get(rl->routers, idx) == ri_old);
1405 
1406  {
1407  routerinfo_t *ri_old_tmp=NULL;
1408  nodelist_set_routerinfo(ri_new, &ri_old_tmp);
1409  tor_assert(ri_old == ri_old_tmp);
1410  }
1411 
1413  if (idx >= 0) {
1414  smartlist_set(rl->routers, idx, ri_new);
1415  ri_old->cache_info.routerlist_index = -1;
1416  ri_new->cache_info.routerlist_index = idx;
1417  /* Check that ri_old is not in rl->routers anymore: */
1418  tor_assert( routerlist_find_elt_(rl->routers, ri_old, -1) == -1 );
1419  } else {
1420  log_warn(LD_BUG, "Appending entry from routerlist_replace.");
1421  routerlist_insert(rl, ri_new);
1422  return;
1423  }
1424  if (tor_memneq(ri_old->cache_info.identity_digest,
1425  ri_new->cache_info.identity_digest, DIGEST_LEN)) {
1426  /* digests don't match; digestmap_set won't replace */
1427  rimap_remove(rl->identity_map, ri_old->cache_info.identity_digest);
1428  }
1429  ri_tmp = rimap_set(rl->identity_map,
1430  ri_new->cache_info.identity_digest, ri_new);
1431  tor_assert(!ri_tmp || ri_tmp == ri_old);
1432  sdmap_set(rl->desc_digest_map,
1433  ri_new->cache_info.signed_descriptor_digest,
1434  &(ri_new->cache_info));
1435 
1436  if (!tor_digest_is_zero(ri_new->cache_info.extra_info_digest)) {
1437  sdmap_set(rl->desc_by_eid_map, ri_new->cache_info.extra_info_digest,
1438  &ri_new->cache_info);
1439  }
1440 
1441  same_descriptors = tor_memeq(ri_old->cache_info.signed_descriptor_digest,
1442  ri_new->cache_info.signed_descriptor_digest,
1443  DIGEST_LEN);
1444 
1445  if (should_cache_old_descriptors() &&
1446  ri_old->purpose == ROUTER_PURPOSE_GENERAL &&
1447  !same_descriptors) {
1448  /* ri_old is going to become a signed_descriptor_t and go into
1449  * old_routers */
1451  smartlist_add(rl->old_routers, sd);
1452  sd->routerlist_index = smartlist_len(rl->old_routers)-1;
1453  sdmap_set(rl->desc_digest_map, sd->signed_descriptor_digest, sd);
1455  sdmap_set(rl->desc_by_eid_map, sd->extra_info_digest, sd);
1456  } else {
1457  /* We're dropping ri_old. */
1458  if (!same_descriptors) {
1459  /* digests don't match; The sdmap_set above didn't replace */
1460  sdmap_remove(rl->desc_digest_map,
1461  ri_old->cache_info.signed_descriptor_digest);
1462 
1463  if (tor_memneq(ri_old->cache_info.extra_info_digest,
1464  ri_new->cache_info.extra_info_digest, DIGEST_LEN)) {
1465  ei_tmp = eimap_remove(rl->extra_info_map,
1466  ri_old->cache_info.extra_info_digest);
1467  if (ei_tmp) {
1469  ei_tmp->cache_info.signed_descriptor_len;
1470  extrainfo_free(ei_tmp);
1471  }
1472  }
1473 
1474  if (!tor_digest_is_zero(ri_old->cache_info.extra_info_digest)) {
1475  sdmap_remove(rl->desc_by_eid_map,
1476  ri_old->cache_info.extra_info_digest);
1477  }
1478  }
1479  rl->desc_store.bytes_dropped += ri_old->cache_info.signed_descriptor_len;
1480  routerinfo_free(ri_old);
1481  }
1482 #ifdef DEBUG_ROUTERLIST
1484 #endif
1485 }
1486 
1487 /** Extract the descriptor <b>sd</b> from old_routerlist, and re-parse
1488  * it as a fresh routerinfo_t. */
1489 static routerinfo_t *
1491 {
1492  routerinfo_t *ri;
1493  const char *body;
1494 
1496 
1499  0, 1, NULL, NULL);
1500  if (!ri)
1501  return NULL;
1502  signed_descriptor_move(&ri->cache_info, sd);
1503 
1504  routerlist_remove_old(rl, sd, -1);
1505 
1506  return ri;
1507 }
1508 
1509 /** Free all memory held by the routerlist module.
1510  * Note: Calling routerlist_free_all() should always be paired with
1511  * a call to nodelist_free_all(). These should only be called during
1512  * cleanup.
1513  */
1514 void
1516 {
1517  routerlist_t *rl = routerlist;
1518  routerlist = NULL; // Prevent internals of routerlist_free() from using
1519  // routerlist.
1520  routerlist_free(rl);
1521  dirlist_free_all();
1522  if (warned_nicknames) {
1523  SMARTLIST_FOREACH(warned_nicknames, char *, cp, tor_free(cp));
1524  smartlist_free(warned_nicknames);
1525  warned_nicknames = NULL;
1526  }
1527  authcert_free_all();
1528 }
1529 
1530 /** Forget that we have issued any router-related warnings, so that we'll
1531  * warn again if we see the same errors. */
1532 void
1534 {
1535  if (!warned_nicknames)
1537  SMARTLIST_FOREACH(warned_nicknames, char *, cp, tor_free(cp));
1538  smartlist_clear(warned_nicknames); /* now the list is empty. */
1539 
1541 }
1542 
1543 /** Return 1 if the signed descriptor of this router is older than
1544  * <b>seconds</b> seconds. Otherwise return 0. */
1545 MOCK_IMPL(int,
1546 router_descriptor_is_older_than,(const routerinfo_t *router, int seconds))
1547 {
1548  return router->cache_info.published_on < approx_time() - seconds;
1549 }
1550 
1551 /** Add <b>router</b> to the routerlist, if we don't already have it. Replace
1552  * older entries (if any) with the same key.
1553  *
1554  * Note: Callers should not hold their pointers to <b>router</b> if this
1555  * function fails; <b>router</b> will either be inserted into the routerlist or
1556  * freed. Similarly, even if this call succeeds, they should not hold their
1557  * pointers to <b>router</b> after subsequent calls with other routerinfo's --
1558  * they might cause the original routerinfo to get freed.
1559  *
1560  * Returns the status for the operation. Might set *<b>msg</b> if it wants
1561  * the poster of the router to know something.
1562  *
1563  * If <b>from_cache</b>, this descriptor came from our disk cache. If
1564  * <b>from_fetch</b>, we received it in response to a request we made.
1565  * (If both are false, that means it was uploaded to us as an auth dir
1566  * server or via the controller.)
1567  *
1568  * This function should be called *after*
1569  * routers_update_status_from_consensus_networkstatus; subsequently, you
1570  * should call router_rebuild_store and routerlist_descriptors_added.
1571  */
1573 router_add_to_routerlist(routerinfo_t *router, const char **msg,
1574  int from_cache, int from_fetch)
1575 {
1576  const char *id_digest;
1577  const or_options_t *options = get_options();
1578  int authdir = authdir_mode_handles_descs(options, router->purpose);
1579  int authdir_believes_valid = 0;
1580  routerinfo_t *old_router;
1581  networkstatus_t *consensus =
1583  int in_consensus = 0;
1584 
1585  tor_assert(msg);
1586 
1587  if (!routerlist)
1589 
1590  id_digest = router->cache_info.identity_digest;
1591 
1592  old_router = router_get_mutable_by_digest(id_digest);
1593 
1594  /* Make sure that it isn't expired. */
1595  if (router->cert_expiration_time < approx_time()) {
1596  routerinfo_free(router);
1597  *msg = "Some certs on this router are expired.";
1598  return ROUTER_CERTS_EXPIRED;
1599  }
1600 
1601  /* Make sure that we haven't already got this exact descriptor. */
1602  if (sdmap_get(routerlist->desc_digest_map,
1603  router->cache_info.signed_descriptor_digest)) {
1604  /* If we have this descriptor already and the new descriptor is a bridge
1605  * descriptor, replace it. If we had a bridge descriptor before and the
1606  * new one is not a bridge descriptor, don't replace it. */
1607 
1608  /* Only members of routerlist->identity_map can be bridges; we don't
1609  * put bridges in old_routers. */
1610  const int was_bridge = old_router &&
1611  old_router->purpose == ROUTER_PURPOSE_BRIDGE;
1612 
1613  if (routerinfo_is_a_configured_bridge(router) &&
1614  router->purpose == ROUTER_PURPOSE_BRIDGE &&
1615  !was_bridge) {
1616  log_info(LD_DIR, "Replacing non-bridge descriptor with bridge "
1617  "descriptor for router %s",
1618  router_describe(router));
1619  } else {
1620  log_info(LD_DIR,
1621  "Dropping descriptor that we already have for router %s",
1622  router_describe(router));
1623  *msg = "Router descriptor was not new.";
1624  routerinfo_free(router);
1625  return ROUTER_IS_ALREADY_KNOWN;
1626  }
1627  }
1628 
1629  if (authdir) {
1630  if (authdir_wants_to_reject_router(router, msg,
1631  !from_cache && !from_fetch,
1632  &authdir_believes_valid)) {
1633  tor_assert(*msg);
1634  routerinfo_free(router);
1635  return ROUTER_AUTHDIR_REJECTS;
1636  }
1637  } else if (from_fetch) {
1638  /* Only check the descriptor digest against the network statuses when
1639  * we are receiving in response to a fetch. */
1640 
1641  if (!signed_desc_digest_is_recognized(&router->cache_info) &&
1643  /* We asked for it, so some networkstatus must have listed it when we
1644  * did. Save it if we're a cache in case somebody else asks for it. */
1645  log_info(LD_DIR,
1646  "Received a no-longer-recognized descriptor for router %s",
1647  router_describe(router));
1648  *msg = "Router descriptor is not referenced by any network-status.";
1649 
1650  /* Only journal this desc if we want to keep old descriptors */
1651  if (!from_cache && should_cache_old_descriptors())
1652  signed_desc_append_to_journal(&router->cache_info,
1655  return ROUTER_NOT_IN_CONSENSUS_OR_NETWORKSTATUS;
1656  }
1657  }
1658 
1659  /* We no longer need a router with this descriptor digest. */
1660  if (consensus) {
1662  consensus, id_digest);
1663  if (rs && tor_memeq(rs->descriptor_digest,
1664  router->cache_info.signed_descriptor_digest,
1665  DIGEST_LEN)) {
1666  in_consensus = 1;
1667  }
1668  }
1669 
1670  if (router->purpose == ROUTER_PURPOSE_GENERAL &&
1671  consensus && !in_consensus && !authdir) {
1672  /* If it's a general router not listed in the consensus, then don't
1673  * consider replacing the latest router with it. */
1674  if (!from_cache && should_cache_old_descriptors())
1675  signed_desc_append_to_journal(&router->cache_info,
1678  *msg = "Skipping router descriptor: not in consensus.";
1679  return ROUTER_NOT_IN_CONSENSUS;
1680  }
1681 
1682  /* If we're reading a bridge descriptor from our cache, and we don't
1683  * recognize it as one of our currently configured bridges, drop the
1684  * descriptor. Otherwise we could end up using it as one of our entry
1685  * guards even if it isn't in our Bridge config lines. */
1686  if (router->purpose == ROUTER_PURPOSE_BRIDGE && from_cache &&
1687  !authdir_mode_bridge(options) &&
1689  log_info(LD_DIR, "Dropping bridge descriptor for %s because we have "
1690  "no bridge configured at that address.",
1691  safe_str_client(router_describe(router)));
1692  *msg = "Router descriptor was not a configured bridge.";
1693  routerinfo_free(router);
1694  return ROUTER_WAS_NOT_WANTED;
1695  }
1696 
1697  /* If we have a router with the same identity key, choose the newer one. */
1698  if (old_router) {
1699  if (!in_consensus && (router->cache_info.published_on <=
1700  old_router->cache_info.published_on)) {
1701  /* Same key, but old. This one is not listed in the consensus. */
1702  log_debug(LD_DIR, "Not-new descriptor for router %s",
1703  router_describe(router));
1704  /* Only journal this desc if we'll be serving it. */
1705  if (!from_cache && should_cache_old_descriptors())
1706  signed_desc_append_to_journal(&router->cache_info,
1709  *msg = "Router descriptor was not new.";
1710  return ROUTER_IS_ALREADY_KNOWN;
1711  } else {
1712  /* Same key, and either new, or listed in the consensus. */
1713  log_debug(LD_DIR, "Replacing entry for router %s",
1714  router_describe(router));
1715  routerlist_replace(routerlist, old_router, router);
1716  if (!from_cache) {
1717  signed_desc_append_to_journal(&router->cache_info,
1719  }
1720  *msg = authdir_believes_valid ? "Valid server updated" :
1721  ("Invalid server updated. (This dirserver is marking your "
1722  "server as unapproved.)");
1723  return ROUTER_ADDED_SUCCESSFULLY;
1724  }
1725  }
1726 
1727  if (!in_consensus && from_cache &&
1729  *msg = "Router descriptor was really old.";
1730  routerinfo_free(router);
1731  return ROUTER_WAS_TOO_OLD;
1732  }
1733 
1734  /* We haven't seen a router with this identity before. Add it to the end of
1735  * the list. */
1736  routerlist_insert(routerlist, router);
1737  if (!from_cache) {
1738  signed_desc_append_to_journal(&router->cache_info,
1740  }
1741  return ROUTER_ADDED_SUCCESSFULLY;
1742 }
1743 
1744 /** Insert <b>ei</b> into the routerlist, or free it. Other arguments are
1745  * as for router_add_to_routerlist(). Return ROUTER_ADDED_SUCCESSFULLY iff
1746  * we actually inserted it, ROUTER_BAD_EI otherwise.
1747  */
1750  int from_cache, int from_fetch)
1751 {
1752  was_router_added_t inserted;
1753  (void)from_fetch;
1754  if (msg) *msg = NULL;
1755  /*XXXX Do something with msg */
1756 
1757  inserted = extrainfo_insert(router_get_routerlist(), ei, !from_cache);
1758 
1759  if (WRA_WAS_ADDED(inserted) && !from_cache)
1760  signed_desc_append_to_journal(&ei->cache_info,
1762 
1763  return inserted;
1764 }
1765 
1766 /** Sorting helper: return &lt;0, 0, or &gt;0 depending on whether the
1767  * signed_descriptor_t* in *<b>a</b> has an identity digest preceding, equal
1768  * to, or later than that of *<b>b</b>. */
1769 static int
1770 compare_old_routers_by_identity_(const void **_a, const void **_b)
1771 {
1772  int i;
1773  const signed_descriptor_t *r1 = *_a, *r2 = *_b;
1774  if ((i = fast_memcmp(r1->identity_digest, r2->identity_digest, DIGEST_LEN)))
1775  return i;
1776  return (int)(r1->published_on - r2->published_on);
1777 }
1778 
1779 /** Internal type used to represent how long an old descriptor was valid,
1780  * where it appeared in the list of old descriptors, and whether it's extra
1781  * old. Used only by routerlist_remove_old_cached_routers_with_id(). */
1783  int duration;
1784  int idx;
1785  int old;
1786 };
1787 
1788 /** Sorting helper: compare two duration_idx_t by their duration. */
1789 static int
1790 compare_duration_idx_(const void *_d1, const void *_d2)
1791 {
1792  const struct duration_idx_t *d1 = _d1;
1793  const struct duration_idx_t *d2 = _d2;
1794  return d1->duration - d2->duration;
1795 }
1796 
1797 /** The range <b>lo</b> through <b>hi</b> inclusive of routerlist->old_routers
1798  * must contain routerinfo_t with the same identity and with publication time
1799  * in ascending order. Remove members from this range until there are no more
1800  * than max_descriptors_per_router() remaining. Start by removing the oldest
1801  * members from before <b>cutoff</b>, then remove members which were current
1802  * for the lowest amount of time. The order of members of old_routers at
1803  * indices <b>lo</b> or higher may be changed.
1804  */
1805 static void
1807  time_t cutoff, int lo, int hi,
1808  digestset_t *retain)
1809 {
1810  int i, n = hi-lo+1;
1811  unsigned n_extra, n_rmv = 0;
1812  struct duration_idx_t *lifespans;
1813  uint8_t *rmv, *must_keep;
1815 #if 1
1816  const char *ident;
1817  tor_assert(hi < smartlist_len(lst));
1818  tor_assert(lo <= hi);
1819  ident = ((signed_descriptor_t*)smartlist_get(lst, lo))->identity_digest;
1820  for (i = lo+1; i <= hi; ++i) {
1821  signed_descriptor_t *r = smartlist_get(lst, i);
1823  }
1824 #endif /* 1 */
1825  /* Check whether we need to do anything at all. */
1826  {
1827  int mdpr = directory_caches_dir_info(get_options()) ? 2 : 1;
1828  if (n <= mdpr)
1829  return;
1830  n_extra = n - mdpr;
1831  }
1832 
1833  lifespans = tor_calloc(n, sizeof(struct duration_idx_t));
1834  rmv = tor_calloc(n, sizeof(uint8_t));
1835  must_keep = tor_calloc(n, sizeof(uint8_t));
1836  /* Set lifespans to contain the lifespan and index of each server. */
1837  /* Set rmv[i-lo]=1 if we're going to remove a server for being too old. */
1838  for (i = lo; i <= hi; ++i) {
1839  signed_descriptor_t *r = smartlist_get(lst, i);
1840  signed_descriptor_t *r_next;
1841  lifespans[i-lo].idx = i;
1842  if (r->last_listed_as_valid_until >= now ||
1843  (retain && digestset_probably_contains(retain,
1844  r->signed_descriptor_digest))) {
1845  must_keep[i-lo] = 1;
1846  }
1847  if (i < hi) {
1848  r_next = smartlist_get(lst, i+1);
1849  tor_assert(r->published_on <= r_next->published_on);
1850  lifespans[i-lo].duration = (int)(r_next->published_on - r->published_on);
1851  } else {
1852  r_next = NULL;
1853  lifespans[i-lo].duration = INT_MAX;
1854  }
1855  if (!must_keep[i-lo] && r->published_on < cutoff && n_rmv < n_extra) {
1856  ++n_rmv;
1857  lifespans[i-lo].old = 1;
1858  rmv[i-lo] = 1;
1859  }
1860  }
1861 
1862  if (n_rmv < n_extra) {
1863  /**
1864  * We aren't removing enough servers for being old. Sort lifespans by
1865  * the duration of liveness, and remove the ones we're not already going to
1866  * remove based on how long they were alive.
1867  **/
1868  qsort(lifespans, n, sizeof(struct duration_idx_t), compare_duration_idx_);
1869  for (i = 0; i < n && n_rmv < n_extra; ++i) {
1870  if (!must_keep[lifespans[i].idx-lo] && !lifespans[i].old) {
1871  rmv[lifespans[i].idx-lo] = 1;
1872  ++n_rmv;
1873  }
1874  }
1875  }
1876 
1877  i = hi;
1878  do {
1879  if (rmv[i-lo])
1880  routerlist_remove_old(routerlist, smartlist_get(lst, i), i);
1881  } while (--i >= lo);
1882  tor_free(must_keep);
1883  tor_free(rmv);
1884  tor_free(lifespans);
1885 }
1886 
1887 /** Deactivate any routers from the routerlist that are more than
1888  * ROUTER_MAX_AGE seconds old and not recommended by any networkstatuses;
1889  * remove old routers from the list of cached routers if we have too many.
1890  */
1891 void
1893 {
1894  int i, hi=-1;
1895  const char *cur_id = NULL;
1896  time_t now = time(NULL);
1897  time_t cutoff;
1898  routerinfo_t *router;
1899  signed_descriptor_t *sd;
1900  digestset_t *retain;
1902 
1904 
1905  if (!routerlist || !consensus)
1906  return;
1907 
1908  // routerlist_assert_ok(routerlist);
1909 
1910  /* We need to guess how many router descriptors we will wind up wanting to
1911  retain, so that we can be sure to allocate a large enough Bloom filter
1912  to hold the digest set. Overestimating is fine; underestimating is bad.
1913  */
1914  {
1915  /* We'll probably retain everything in the consensus. */
1916  int n_max_retain = smartlist_len(consensus->routerstatus_list);
1917  retain = digestset_new(n_max_retain);
1918  }
1919 
1920  cutoff = now - OLD_ROUTER_DESC_MAX_AGE;
1921  /* Retain anything listed in the consensus. */
1922  if (consensus) {
1924  if (rs->published_on >= cutoff)
1925  digestset_add(retain, rs->descriptor_digest));
1926  }
1927 
1928  /* If we have a consensus, we should consider pruning current routers that
1929  * are too old and that nobody recommends. (If we don't have a consensus,
1930  * then we should get one before we decide to kill routers.) */
1931 
1932  if (consensus) {
1933  cutoff = now - ROUTER_MAX_AGE;
1934  /* Remove too-old unrecommended members of routerlist->routers. */
1935  for (i = 0; i < smartlist_len(routerlist->routers); ++i) {
1936  router = smartlist_get(routerlist->routers, i);
1937  if (router->cache_info.published_on <= cutoff &&
1938  router->cache_info.last_listed_as_valid_until < now &&
1940  router->cache_info.signed_descriptor_digest)) {
1941  /* Too old: remove it. (If we're a cache, just move it into
1942  * old_routers.) */
1943  log_info(LD_DIR,
1944  "Forgetting obsolete (too old) routerinfo for router %s",
1945  router_describe(router));
1946  routerlist_remove(routerlist, router, 1, now);
1947  i--;
1948  }
1949  }
1950  }
1951 
1952  //routerlist_assert_ok(routerlist);
1953 
1954  /* Remove far-too-old members of routerlist->old_routers. */
1955  cutoff = now - OLD_ROUTER_DESC_MAX_AGE;
1956  for (i = 0; i < smartlist_len(routerlist->old_routers); ++i) {
1957  sd = smartlist_get(routerlist->old_routers, i);
1958  if (sd->published_on <= cutoff &&
1959  sd->last_listed_as_valid_until < now &&
1961  /* Too old. Remove it. */
1963  }
1964  }
1965 
1966  //routerlist_assert_ok(routerlist);
1967 
1968  log_info(LD_DIR, "We have %d live routers and %d old router descriptors.",
1969  smartlist_len(routerlist->routers),
1970  smartlist_len(routerlist->old_routers));
1971 
1972  /* Now we might have to look at routerlist->old_routers for extraneous
1973  * members. (We'd keep all the members if we could, but we need to save
1974  * space.) First, check whether we have too many router descriptors, total.
1975  * We're okay with having too many for some given router, so long as the
1976  * total number doesn't approach max_descriptors_per_router()*len(router).
1977  */
1978  if (smartlist_len(routerlist->old_routers) <
1979  smartlist_len(routerlist->routers))
1980  goto done;
1981 
1982  /* Sort by identity, then fix indices. */
1984  /* Fix indices. */
1985  for (i = 0; i < smartlist_len(routerlist->old_routers); ++i) {
1986  signed_descriptor_t *r = smartlist_get(routerlist->old_routers, i);
1987  r->routerlist_index = i;
1988  }
1989 
1990  /* Iterate through the list from back to front, so when we remove descriptors
1991  * we don't mess up groups we haven't gotten to. */
1992  for (i = smartlist_len(routerlist->old_routers)-1; i >= 0; --i) {
1993  signed_descriptor_t *r = smartlist_get(routerlist->old_routers, i);
1994  if (!cur_id) {
1995  cur_id = r->identity_digest;
1996  hi = i;
1997  }
1998  if (tor_memneq(cur_id, r->identity_digest, DIGEST_LEN)) {
2000  cutoff, i+1, hi, retain);
2001  cur_id = r->identity_digest;
2002  hi = i;
2003  }
2004  }
2005  if (hi>=0)
2006  routerlist_remove_old_cached_routers_with_id(now, cutoff, 0, hi, retain);
2007  //routerlist_assert_ok(routerlist);
2008 
2009  done:
2010  digestset_free(retain);
2011  router_rebuild_store(RRS_DONT_REMOVE_OLD, &routerlist->desc_store);
2012  router_rebuild_store(RRS_DONT_REMOVE_OLD,&routerlist->extrainfo_store);
2013 }
2014 
2015 /** We just added a new set of descriptors. Take whatever extra steps
2016  * we need. */
2017 void
2019 {
2020  // XXXX use pubsub mechanism here.
2021 
2022  tor_assert(sl);
2025  if (ri->purpose == ROUTER_PURPOSE_BRIDGE)
2026  learned_bridge_descriptor(ri, from_cache);
2027  if (ri->needs_retest_if_added) {
2028  ri->needs_retest_if_added = 0;
2030  }
2031  } SMARTLIST_FOREACH_END(ri);
2032 }
2033 
2034 /**
2035  * Code to parse a single router descriptor and insert it into the
2036  * routerlist. Return -1 if the descriptor was ill-formed; 0 if the
2037  * descriptor was well-formed but could not be added; and 1 if the
2038  * descriptor was added.
2039  *
2040  * If we don't add it and <b>msg</b> is not NULL, then assign to
2041  * *<b>msg</b> a static string describing the reason for refusing the
2042  * descriptor.
2043  *
2044  * This is used only by the controller.
2045  */
2046 int
2047 router_load_single_router(const char *s, uint8_t purpose, int cache,
2048  const char **msg)
2049 {
2050  routerinfo_t *ri;
2052  smartlist_t *lst;
2053  char annotation_buf[ROUTER_ANNOTATION_BUF_LEN];
2054  tor_assert(msg);
2055  *msg = NULL;
2056 
2057  tor_snprintf(annotation_buf, sizeof(annotation_buf),
2058  "@source controller\n"
2059  "@purpose %s\n", router_purpose_to_string(purpose));
2060 
2061  if (!(ri = router_parse_entry_from_string(s, NULL, 1, 0,
2062  annotation_buf, NULL))) {
2063  log_warn(LD_DIR, "Error parsing router descriptor; dropping.");
2064  *msg = "Couldn't parse router descriptor.";
2065  return -1;
2066  }
2067  tor_assert(ri->purpose == purpose);
2068  if (router_is_me(ri)) {
2069  log_warn(LD_DIR, "Router's identity key matches mine; dropping.");
2070  *msg = "Router's identity key matches mine.";
2071  routerinfo_free(ri);
2072  return 0;
2073  }
2074 
2075  if (!cache) /* obey the preference of the controller */
2076  ri->cache_info.do_not_cache = 1;
2077 
2078  lst = smartlist_new();
2079  smartlist_add(lst, ri);
2081 
2082  r = router_add_to_routerlist(ri, msg, 0, 0);
2083  if (!WRA_WAS_ADDED(r)) {
2084  /* we've already assigned to *msg now, and ri is already freed */
2085  tor_assert(*msg);
2086  if (r == ROUTER_AUTHDIR_REJECTS)
2087  log_warn(LD_DIR, "Couldn't add router to list: %s Dropping.", *msg);
2088  smartlist_free(lst);
2089  return 0;
2090  } else {
2092  smartlist_free(lst);
2093  log_debug(LD_DIR, "Added router to list");
2094  return 1;
2095  }
2096 }
2097 
2098 /** Given a string <b>s</b> containing some routerdescs, parse it and put the
2099  * routers into our directory. If saved_location is SAVED_NOWHERE, the routers
2100  * are in response to a query to the network: cache them by adding them to
2101  * the journal.
2102  *
2103  * Return the number of routers actually added.
2104  *
2105  * If <b>requested_fingerprints</b> is provided, it must contain a list of
2106  * uppercased fingerprints. Do not update any router whose
2107  * fingerprint is not on the list; after updating a router, remove its
2108  * fingerprint from the list.
2109  *
2110  * If <b>descriptor_digests</b> is non-zero, then the requested_fingerprints
2111  * are descriptor digests. Otherwise they are identity digests.
2112  */
2113 int
2114 router_load_routers_from_string(const char *s, const char *eos,
2115  saved_location_t saved_location,
2116  smartlist_t *requested_fingerprints,
2117  int descriptor_digests,
2118  const char *prepend_annotations)
2119 {
2120  smartlist_t *routers = smartlist_new(), *changed = smartlist_new();
2121  char fp[HEX_DIGEST_LEN+1];
2122  const char *msg;
2123  int from_cache = (saved_location != SAVED_NOWHERE);
2124  int allow_annotations = (saved_location != SAVED_NOWHERE);
2125  int any_changed = 0;
2126  smartlist_t *invalid_digests = smartlist_new();
2127 
2128  router_parse_list_from_string(&s, eos, routers, saved_location, 0,
2129  allow_annotations, prepend_annotations,
2130  invalid_digests);
2131 
2133 
2134  log_info(LD_DIR, "%d elements to add", smartlist_len(routers));
2135 
2136  SMARTLIST_FOREACH_BEGIN(routers, routerinfo_t *, ri) {
2138  char d[DIGEST_LEN];
2139  if (requested_fingerprints) {
2140  base16_encode(fp, sizeof(fp), descriptor_digests ?
2141  ri->cache_info.signed_descriptor_digest :
2142  ri->cache_info.identity_digest,
2143  DIGEST_LEN);
2144  if (smartlist_contains_string(requested_fingerprints, fp)) {
2145  smartlist_string_remove(requested_fingerprints, fp);
2146  } else {
2147  char *requested =
2148  smartlist_join_strings(requested_fingerprints," ",0,NULL);
2149  log_warn(LD_DIR,
2150  "We received a router descriptor with a fingerprint (%s) "
2151  "that we never requested. (We asked for: %s.) Dropping.",
2152  fp, requested);
2153  tor_free(requested);
2154  routerinfo_free(ri);
2155  continue;
2156  }
2157  }
2158 
2159  memcpy(d, ri->cache_info.signed_descriptor_digest, DIGEST_LEN);
2160  r = router_add_to_routerlist(ri, &msg, from_cache, !from_cache);
2161  if (WRA_WAS_ADDED(r)) {
2162  any_changed++;
2163  smartlist_add(changed, ri);
2164  routerlist_descriptors_added(changed, from_cache);
2165  smartlist_clear(changed);
2166  } else if (WRA_NEVER_DOWNLOADABLE(r)) {
2167  download_status_t *dl_status;
2169  if (dl_status) {
2170  log_info(LD_GENERAL, "Marking router %s as never downloadable",
2171  hex_str(d, DIGEST_LEN));
2173  }
2174  }
2175  } SMARTLIST_FOREACH_END(ri);
2176 
2177  SMARTLIST_FOREACH_BEGIN(invalid_digests, const uint8_t *, bad_digest) {
2178  /* This digest is never going to be parseable. */
2179  base16_encode(fp, sizeof(fp), (char*)bad_digest, DIGEST_LEN);
2180  if (requested_fingerprints && descriptor_digests) {
2181  if (! smartlist_contains_string(requested_fingerprints, fp)) {
2182  /* But we didn't ask for it, so we should assume shennanegans. */
2183  continue;
2184  }
2185  smartlist_string_remove(requested_fingerprints, fp);
2186  }
2187  download_status_t *dls;
2188  dls = router_get_dl_status_by_descriptor_digest((char*)bad_digest);
2189  if (dls) {
2190  log_info(LD_GENERAL, "Marking router with descriptor %s as unparseable, "
2191  "and therefore undownloadable", fp);
2193  }
2194  } SMARTLIST_FOREACH_END(bad_digest);
2195  SMARTLIST_FOREACH(invalid_digests, uint8_t *, d, tor_free(d));
2196  smartlist_free(invalid_digests);
2197 
2199 
2200  if (any_changed)
2202 
2203  smartlist_free(routers);
2204  smartlist_free(changed);
2205 
2206  return any_changed;
2207 }
2208 
2209 /** Parse one or more extrainfos from <b>s</b> (ending immediately before
2210  * <b>eos</b> if <b>eos</b> is present). Other arguments are as for
2211  * router_load_routers_from_string(). */
2212 void
2213 router_load_extrainfo_from_string(const char *s, const char *eos,
2214  saved_location_t saved_location,
2215  smartlist_t *requested_fingerprints,
2216  int descriptor_digests)
2217 {
2218  smartlist_t *extrainfo_list = smartlist_new();
2219  const char *msg;
2220  int from_cache = (saved_location != SAVED_NOWHERE);
2221  smartlist_t *invalid_digests = smartlist_new();
2222 
2223  router_parse_list_from_string(&s, eos, extrainfo_list, saved_location, 1, 0,
2224  NULL, invalid_digests);
2225 
2226  log_info(LD_DIR, "%d elements to add", smartlist_len(extrainfo_list));
2227 
2228  SMARTLIST_FOREACH_BEGIN(extrainfo_list, extrainfo_t *, ei) {
2229  uint8_t d[DIGEST_LEN];
2230  memcpy(d, ei->cache_info.signed_descriptor_digest, DIGEST_LEN);
2231  was_router_added_t added =
2232  router_add_extrainfo_to_routerlist(ei, &msg, from_cache, !from_cache);
2233  if (WRA_WAS_ADDED(added) && requested_fingerprints) {
2234  char fp[HEX_DIGEST_LEN+1];
2235  base16_encode(fp, sizeof(fp), descriptor_digests ?
2236  ei->cache_info.signed_descriptor_digest :
2237  ei->cache_info.identity_digest,
2238  DIGEST_LEN);
2239  smartlist_string_remove(requested_fingerprints, fp);
2240  /* We silently let relays stuff us with extrainfos we didn't ask for,
2241  * so long as we would have wanted them anyway. Since we always fetch
2242  * all the extrainfos we want, and we never actually act on them
2243  * inside Tor, this should be harmless. */
2244  } else if (WRA_NEVER_DOWNLOADABLE(added)) {
2246  if (sd) {
2247  log_info(LD_GENERAL, "Marking extrainfo with descriptor %s as "
2248  "unparseable, and therefore undownloadable",
2249  hex_str((char*)d,DIGEST_LEN));
2251  }
2252  }
2253  } SMARTLIST_FOREACH_END(ei);
2254 
2255  SMARTLIST_FOREACH_BEGIN(invalid_digests, const uint8_t *, bad_digest) {
2256  /* This digest is never going to be parseable. */
2257  char fp[HEX_DIGEST_LEN+1];
2258  base16_encode(fp, sizeof(fp), (char*)bad_digest, DIGEST_LEN);
2259  if (requested_fingerprints) {
2260  if (! smartlist_contains_string(requested_fingerprints, fp)) {
2261  /* But we didn't ask for it, so we should assume shennanegans. */
2262  continue;
2263  }
2264  smartlist_string_remove(requested_fingerprints, fp);
2265  }
2266  signed_descriptor_t *sd =
2267  router_get_by_extrainfo_digest((char*)bad_digest);
2268  if (sd) {
2269  log_info(LD_GENERAL, "Marking extrainfo with descriptor %s as "
2270  "unparseable, and therefore undownloadable", fp);
2272  }
2273  } SMARTLIST_FOREACH_END(bad_digest);
2274  SMARTLIST_FOREACH(invalid_digests, uint8_t *, d, tor_free(d));
2275  smartlist_free(invalid_digests);
2276 
2278  router_rebuild_store(0, &router_get_routerlist()->extrainfo_store);
2279 
2280  smartlist_free(extrainfo_list);
2281 }
2282 
2283 /** Return true iff the latest ns-flavored consensus includes a descriptor
2284  * whose digest is that of <b>desc</b>. */
2285 static int
2287 {
2288  const routerstatus_t *rs;
2290  FLAV_NS);
2291 
2292  if (consensus) {
2293  rs = networkstatus_vote_find_entry(consensus, desc->identity_digest);
2294  if (rs && tor_memeq(rs->descriptor_digest,
2296  return 1;
2297  }
2298  return 0;
2299 }
2300 
2301 /** Update downloads for router descriptors and/or microdescriptors as
2302  * appropriate. */
2303 void
2305 {
2307  return;
2310 }
2311 
2312 /** Clear all our timeouts for fetching v3 directory stuff, and then
2313  * give it all a try again. */
2314 void
2316 {
2317  (void)now;
2318 
2319  log_debug(LD_GENERAL,
2320  "In routerlist_retry_directory_downloads()");
2321 
2325 }
2326 
2327 /** Return true iff <b>router</b> does not permit exit streams.
2328  */
2329 int
2331 {
2332  return router->policy_is_reject_star;
2333 }
2334 
2335 /** For every current directory connection whose purpose is <b>purpose</b>,
2336  * and where the resource being downloaded begins with <b>prefix</b>, split
2337  * rest of the resource into base16 fingerprints (or base64 fingerprints if
2338  * purpose==DIR_PURPOSE_FETCH_MICRODESC), decode them, and set the
2339  * corresponding elements of <b>result</b> to a nonzero value.
2340  */
2341 void
2342 list_pending_downloads(digestmap_t *result, digest256map_t *result256,
2343  int purpose, const char *prefix)
2344 {
2345  const size_t p_len = strlen(prefix);
2346  smartlist_t *tmp = smartlist_new();
2347  smartlist_t *conns = get_connection_array();
2348  int flags = DSR_HEX;
2349  if (purpose == DIR_PURPOSE_FETCH_MICRODESC)
2350  flags = DSR_DIGEST256|DSR_BASE64;
2351 
2352  tor_assert(result || result256);
2353 
2354  SMARTLIST_FOREACH_BEGIN(conns, connection_t *, conn) {
2355  if (conn->type == CONN_TYPE_DIR &&
2356  conn->purpose == purpose &&
2357  !conn->marked_for_close) {
2358  const char *resource = TO_DIR_CONN(conn)->requested_resource;
2359  if (!strcmpstart(resource, prefix))
2360  dir_split_resource_into_fingerprints(resource + p_len,
2361  tmp, NULL, flags);
2362  }
2363  } SMARTLIST_FOREACH_END(conn);
2364 
2365  if (result) {
2366  SMARTLIST_FOREACH(tmp, char *, d,
2367  {
2368  digestmap_set(result, d, (void*)1);
2369  tor_free(d);
2370  });
2371  } else if (result256) {
2372  SMARTLIST_FOREACH(tmp, uint8_t *, d,
2373  {
2374  digest256map_set(result256, d, (void*)1);
2375  tor_free(d);
2376  });
2377  }
2378  smartlist_free(tmp);
2379 }
2380 
2381 /** For every router descriptor (or extra-info document if <b>extrainfo</b> is
2382  * true) we are currently downloading by descriptor digest, set result[d] to
2383  * (void*)1. */
2384 static void
2385 list_pending_descriptor_downloads(digestmap_t *result, int extrainfo)
2386 {
2387  int purpose =
2389  list_pending_downloads(result, NULL, purpose, "d/");
2390 }
2391 
2392 /** For every microdescriptor we are currently downloading by descriptor
2393  * digest, set result[d] to (void*)1.
2394  */
2395 void
2396 list_pending_microdesc_downloads(digest256map_t *result)
2397 {
2399 }
2400 
2401 /** Launch downloads for all the descriptors whose digests or digests256
2402  * are listed as digests[i] for lo <= i < hi. (Lo and hi may be out of
2403  * range.) If <b>source</b> is given, download from <b>source</b>;
2404  * otherwise, download from an appropriate random directory server.
2405  */
2406 MOCK_IMPL(STATIC void,
2408  int purpose, smartlist_t *digests,
2409  int lo, int hi, int pds_flags))
2410 {
2411  char *resource, *cp;
2412  int digest_len, enc_digest_len;
2413  const char *sep;
2414  int b64_256;
2415  smartlist_t *tmp;
2416 
2417  if (purpose == DIR_PURPOSE_FETCH_MICRODESC) {
2418  /* Microdescriptors are downloaded by "-"-separated base64-encoded
2419  * 256-bit digests. */
2420  digest_len = DIGEST256_LEN;
2421  enc_digest_len = BASE64_DIGEST256_LEN + 1;
2422  sep = "-";
2423  b64_256 = 1;
2424  } else {
2425  digest_len = DIGEST_LEN;
2426  enc_digest_len = HEX_DIGEST_LEN + 1;
2427  sep = "+";
2428  b64_256 = 0;
2429  }
2430 
2431  if (lo < 0)
2432  lo = 0;
2433  if (hi > smartlist_len(digests))
2434  hi = smartlist_len(digests);
2435 
2436  if (hi-lo <= 0)
2437  return;
2438 
2439  tmp = smartlist_new();
2440 
2441  for (; lo < hi; ++lo) {
2442  cp = tor_malloc(enc_digest_len);
2443  if (b64_256) {
2444  digest256_to_base64(cp, smartlist_get(digests, lo));
2445  } else {
2446  base16_encode(cp, enc_digest_len, smartlist_get(digests, lo),
2447  digest_len);
2448  }
2449  smartlist_add(tmp, cp);
2450  }
2451 
2452  cp = smartlist_join_strings(tmp, sep, 0, NULL);
2453  tor_asprintf(&resource, "d/%s.z", cp);
2454 
2455  SMARTLIST_FOREACH(tmp, char *, cp1, tor_free(cp1));
2456  smartlist_free(tmp);
2457  tor_free(cp);
2458 
2459  if (source) {
2460  /* We know which authority or directory mirror we want. */
2463  directory_request_set_resource(req, resource);
2465  directory_request_free(req);
2466  } else {
2468  pds_flags, DL_WANT_ANY_DIRSERVER);
2469  }
2470  tor_free(resource);
2471 }
2472 
2473 /** Return the max number of hashes to put in a URL for a given request.
2474  */
2475 static int
2476 max_dl_per_request(const or_options_t *options, int purpose)
2477 {
2478  /* Since squid does not like URLs >= 4096 bytes we limit it to 96.
2479  * 4096 - strlen(http://[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535
2480  * /tor/server/d/.z) == 4026
2481  * 4026/41 (40 for the hash and 1 for the + that separates them) => 98
2482  * So use 96 because it's a nice number.
2483  *
2484  * For microdescriptors, the calculation is
2485  * 4096 - strlen(http://[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535
2486  * /tor/micro/d/.z) == 4027
2487  * 4027/44 (43 for the hash and 1 for the - that separates them) => 91
2488  * So use 90 because it's a nice number.
2489  */
2490  int max = 96;
2491  if (purpose == DIR_PURPOSE_FETCH_MICRODESC) {
2492  max = 90;
2493  }
2494  /* If we're going to tunnel our connections, we can ask for a lot more
2495  * in a request. */
2496  if (dirclient_must_use_begindir(options)) {
2497  max = 500;
2498  }
2499  return max;
2500 }
2501 
2502 /** Don't split our requests so finely that we are requesting fewer than
2503  * this number per server. (Grouping more than this at once leads to
2504  * diminishing returns.) */
2505 #define MIN_DL_PER_REQUEST 32
2506 /** To prevent a single screwy cache from confusing us by selective reply,
2507  * try to split our requests into at least this many requests. */
2508 #define MIN_REQUESTS 3
2509 /** If we want fewer than this many descriptors, wait until we
2510  * want more, or until TestingClientMaxIntervalWithoutRequest has passed. */
2511 #define MAX_DL_TO_DELAY 16
2512 
2513 /** Given a <b>purpose</b> (FETCH_MICRODESC or FETCH_SERVERDESC) and a list of
2514  * router descriptor digests or microdescriptor digest256s in
2515  * <b>downloadable</b>, decide whether to delay fetching until we have more.
2516  * If we don't want to delay, launch one or more requests to the appropriate
2517  * directory authorities.
2518  */
2519 void
2521  smartlist_t *downloadable,
2522  const routerstatus_t *source, time_t now)
2523 {
2524  const or_options_t *options = get_options();
2525  const char *descname;
2526  const int fetch_microdesc = (purpose == DIR_PURPOSE_FETCH_MICRODESC);
2527  int n_downloadable = smartlist_len(downloadable);
2528 
2529  int i, n_per_request, max_dl_per_req;
2530  const char *req_plural = "", *rtr_plural = "";
2531  int pds_flags = PDS_RETRY_IF_NO_SERVERS;
2532 
2533  tor_assert(fetch_microdesc || purpose == DIR_PURPOSE_FETCH_SERVERDESC);
2534  descname = fetch_microdesc ? "microdesc" : "routerdesc";
2535 
2536  if (!n_downloadable)
2537  return;
2538 
2539  if (!dirclient_fetches_dir_info_early(options)) {
2540  if (n_downloadable >= MAX_DL_TO_DELAY) {
2541  log_debug(LD_DIR,
2542  "There are enough downloadable %ss to launch requests.",
2543  descname);
2544  } else if (! router_have_minimum_dir_info()) {
2545  log_debug(LD_DIR,
2546  "We are only missing %d %ss, but we'll fetch anyway, since "
2547  "we don't yet have enough directory info.",
2548  n_downloadable, descname);
2549  } else {
2550 
2551  /* should delay */
2554  return;
2555 
2557  log_info(LD_DIR,
2558  "There are not many downloadable %ss, but we've "
2559  "been waiting long enough (%d seconds). Downloading.",
2560  descname,
2562  } else {
2563  log_info(LD_DIR,
2564  "There are not many downloadable %ss, but we haven't "
2565  "tried downloading descriptors recently. Downloading.",
2566  descname);
2567  }
2568  }
2569  }
2570 
2571  if (!authdir_mode(options)) {
2572  /* If we wind up going to the authorities, we want to only open one
2573  * connection to each authority at a time, so that we don't overload
2574  * them. We do this by setting PDS_NO_EXISTING_SERVERDESC_FETCH
2575  * regardless of whether we're a cache or not.
2576  *
2577  * Setting this flag can make initiate_descriptor_downloads() ignore
2578  * requests. We need to make sure that we do in fact call
2579  * update_router_descriptor_downloads() later on, once the connections
2580  * have succeeded or failed.
2581  */
2582  pds_flags |= fetch_microdesc ?
2585  }
2586 
2587  n_per_request = CEIL_DIV(n_downloadable, MIN_REQUESTS);
2588  max_dl_per_req = max_dl_per_request(options, purpose);
2589 
2590  if (n_per_request > max_dl_per_req)
2591  n_per_request = max_dl_per_req;
2592 
2593  if (n_per_request < MIN_DL_PER_REQUEST) {
2594  n_per_request = MIN(MIN_DL_PER_REQUEST, n_downloadable);
2595  }
2596 
2597  if (n_downloadable > n_per_request)
2598  req_plural = rtr_plural = "s";
2599  else if (n_downloadable > 1)
2600  rtr_plural = "s";
2601 
2602  log_info(LD_DIR,
2603  "Launching %d request%s for %d %s%s, %d at a time",
2604  CEIL_DIV(n_downloadable, n_per_request), req_plural,
2605  n_downloadable, descname, rtr_plural, n_per_request);
2606  smartlist_sort_digests(downloadable);
2607  for (i=0; i < n_downloadable; i += n_per_request) {
2608  initiate_descriptor_downloads(source, purpose,
2609  downloadable, i, i+n_per_request,
2610  pds_flags);
2611  }
2613 }
2614 
2615 /** For any descriptor that we want that's currently listed in
2616  * <b>consensus</b>, download it as appropriate. */
2617 void
2619  networkstatus_t *consensus)
2620 {
2621  const or_options_t *options = get_options();
2622  digestmap_t *map = NULL;
2623  smartlist_t *no_longer_old = smartlist_new();
2624  smartlist_t *downloadable = smartlist_new();
2625  routerstatus_t *source = NULL;
2626  int authdir = authdir_mode(options);
2627  int n_delayed=0, n_have=0, n_would_reject=0, n_wouldnt_use=0,
2628  n_inprogress=0, n_in_oldrouters=0;
2629 
2630  if (dirclient_too_idle_to_fetch_descriptors(options, now))
2631  goto done;
2632  if (!consensus)
2633  goto done;
2634 
2635  if (is_vote) {
2636  /* where's it from, so we know whom to ask for descriptors */
2637  dir_server_t *ds;
2638  networkstatus_voter_info_t *voter = smartlist_get(consensus->voters, 0);
2639  tor_assert(voter);
2641  if (ds)
2642  source = &(ds->fake_status);
2643  else
2644  log_warn(LD_DIR, "couldn't lookup source from vote?");
2645  }
2646 
2647  map = digestmap_new();
2649  SMARTLIST_FOREACH_BEGIN(consensus->routerstatus_list, void *, rsp) {
2650  routerstatus_t *rs;
2651  vote_routerstatus_t *vrs;
2652  if (is_vote) {
2653  rs = &(((vote_routerstatus_t *)rsp)->status);
2654  vrs = rsp;
2655  } else {
2656  rs = rsp;
2657  vrs = NULL;
2658  }
2659  signed_descriptor_t *sd;
2661  const routerinfo_t *ri;
2662  ++n_have;
2663  if (!(ri = router_get_by_id_digest(rs->identity_digest)) ||
2664  tor_memneq(ri->cache_info.signed_descriptor_digest,
2666  /* We have a descriptor with this digest, but either there is no
2667  * entry in routerlist with the same ID (!ri), or there is one,
2668  * but the identity digest differs (memneq).
2669  */
2670  smartlist_add(no_longer_old, sd);
2671  ++n_in_oldrouters; /* We have it in old_routers. */
2672  }
2673  continue; /* We have it already. */
2674  }
2675  if (digestmap_get(map, rs->descriptor_digest)) {
2676  ++n_inprogress;
2677  continue; /* We have an in-progress download. */
2678  }
2679  if (!download_status_is_ready(&rs->dl_status, now)) {
2680  ++n_delayed; /* Not ready for retry. */
2681  continue;
2682  }
2683  if (authdir && is_vote && dirserv_would_reject_router(rs, vrs)) {
2684  ++n_would_reject;
2685  continue; /* We would throw it out immediately. */
2686  }
2687  if (!we_want_to_fetch_flavor(options, consensus->flavor) &&
2688  !client_would_use_router(rs, now)) {
2689  ++n_wouldnt_use;
2690  continue; /* We would never use it ourself. */
2691  }
2692  if (is_vote && source) {
2693  char time_bufnew[ISO_TIME_LEN+1];
2694  char time_bufold[ISO_TIME_LEN+1];
2695  const routerinfo_t *oldrouter;
2696  oldrouter = router_get_by_id_digest(rs->identity_digest);
2697  format_iso_time(time_bufnew, rs->published_on);
2698  if (oldrouter)
2699  format_iso_time(time_bufold, oldrouter->cache_info.published_on);
2700  log_info(LD_DIR, "Learned about %s (%s vs %s) from %s's vote (%s)",
2702  time_bufnew,
2703  oldrouter ? time_bufold : "none",
2704  source->nickname, oldrouter ? "known" : "unknown");
2705  }
2706  smartlist_add(downloadable, rs->descriptor_digest);
2707  } SMARTLIST_FOREACH_END(rsp);
2708 
2709  if (!authdir_mode_v3(options)
2710  && smartlist_len(no_longer_old)) {
2712  log_info(LD_DIR, "%d router descriptors listed in consensus are "
2713  "currently in old_routers; making them current.",
2714  smartlist_len(no_longer_old));
2715  SMARTLIST_FOREACH_BEGIN(no_longer_old, signed_descriptor_t *, sd) {
2716  const char *msg;
2718  time_t tmp_cert_expiration_time;
2719  routerinfo_t *ri = routerlist_reparse_old(rl, sd);
2720  if (!ri) {
2721  log_warn(LD_BUG, "Failed to re-parse a router.");
2722  continue;
2723  }
2724  /* need to remember for below, since add_to_routerlist may free. */
2725  tmp_cert_expiration_time = ri->cert_expiration_time;
2726 
2727  r = router_add_to_routerlist(ri, &msg, 1, 0);
2728  if (WRA_WAS_OUTDATED(r)) {
2729  log_warn(LD_DIR, "Couldn't add re-parsed router: %s. This isn't "
2730  "usually a big deal, but you should make sure that your "
2731  "clock and timezone are set correctly.",
2732  msg?msg:"???");
2733  if (r == ROUTER_CERTS_EXPIRED) {
2734  char time_cons[ISO_TIME_LEN+1];
2735  char time_cert_expires[ISO_TIME_LEN+1];
2736  format_iso_time(time_cons, consensus->valid_after);
2737  format_iso_time(time_cert_expires, tmp_cert_expiration_time);
2738  log_warn(LD_DIR, " (I'm looking at a consensus from %s; This "
2739  "router's certificates began expiring at %s.)",
2740  time_cons, time_cert_expires);
2741  }
2742  }
2743  } SMARTLIST_FOREACH_END(sd);
2745  }
2746 
2747  log_info(LD_DIR,
2748  "%d router descriptors downloadable. %d delayed; %d present "
2749  "(%d of those were in old_routers); %d would_reject; "
2750  "%d wouldnt_use; %d in progress.",
2751  smartlist_len(downloadable), n_delayed, n_have, n_in_oldrouters,
2752  n_would_reject, n_wouldnt_use, n_inprogress);
2753 
2755  downloadable, source, now);
2756 
2757  digestmap_free(map, NULL);
2758  done:
2759  smartlist_free(downloadable);
2760  smartlist_free(no_longer_old);
2761 }
2762 
2763 /** Launch downloads for router status as needed. */
2764 void
2766 {
2767  const or_options_t *options = get_options();
2768  if (should_delay_dir_fetches(options, NULL))
2769  return;
2770  if (!we_fetch_router_descriptors(options))
2771  return;
2772 
2775 }
2776 
2777 /** Launch extrainfo downloads as needed. */
2778 void
2780 {
2781  const or_options_t *options = get_options();
2782  routerlist_t *rl;
2783  smartlist_t *wanted;
2784  digestmap_t *pending;
2785  int old_routers, i, max_dl_per_req;
2786  int n_no_ei = 0, n_pending = 0, n_have = 0, n_delay = 0, n_bogus[2] = {0,0};
2787  if (! options->DownloadExtraInfo)
2788  return;
2789  if (should_delay_dir_fetches(options, NULL))
2790  return;
2792  return;
2793 
2794  pending = digestmap_new();
2796  rl = router_get_routerlist();
2797  wanted = smartlist_new();
2798  for (old_routers = 0; old_routers < 2; ++old_routers) {
2799  smartlist_t *lst = old_routers ? rl->old_routers : rl->routers;
2800  for (i = 0; i < smartlist_len(lst); ++i) {
2801  signed_descriptor_t *sd;
2802  char *d;
2803  if (old_routers)
2804  sd = smartlist_get(lst, i);
2805  else
2806  sd = &((routerinfo_t*)smartlist_get(lst, i))->cache_info;
2807  if (sd->is_extrainfo)
2808  continue; /* This should never happen. */
2809  if (old_routers && !router_get_by_id_digest(sd->identity_digest))
2810  continue; /* Couldn't check the signature if we got it. */
2811  if (sd->extrainfo_is_bogus)
2812  continue;
2813  d = sd->extra_info_digest;
2814  if (tor_digest_is_zero(d)) {
2815  ++n_no_ei;
2816  continue;
2817  }
2818  if (eimap_get(rl->extra_info_map, d)) {
2819  ++n_have;
2820  continue;
2821  }
2822  if (!download_status_is_ready(&sd->ei_dl_status, now)) {
2823  ++n_delay;
2824  continue;
2825  }
2826  if (digestmap_get(pending, d)) {
2827  ++n_pending;
2828  continue;
2829  }
2830 
2832  if (sd2 != sd) {
2833  if (sd2 != NULL) {
2834  char d1[HEX_DIGEST_LEN+1], d2[HEX_DIGEST_LEN+1];
2835  char d3[HEX_DIGEST_LEN+1], d4[HEX_DIGEST_LEN+1];
2836  base16_encode(d1, sizeof(d1), sd->identity_digest, DIGEST_LEN);
2837  base16_encode(d2, sizeof(d2), sd2->identity_digest, DIGEST_LEN);
2838  base16_encode(d3, sizeof(d3), d, DIGEST_LEN);
2839  base16_encode(d4, sizeof(d3), sd2->extra_info_digest, DIGEST_LEN);
2840 
2841  log_info(LD_DIR, "Found an entry in %s with mismatched "
2842  "router_get_by_extrainfo_digest() value. This has ID %s "
2843  "but the entry in the map has ID %s. This has EI digest "
2844  "%s and the entry in the map has EI digest %s.",
2845  old_routers?"old_routers":"routers",
2846  d1, d2, d3, d4);
2847  } else {
2848  char d1[HEX_DIGEST_LEN+1], d2[HEX_DIGEST_LEN+1];
2849  base16_encode(d1, sizeof(d1), sd->identity_digest, DIGEST_LEN);
2850  base16_encode(d2, sizeof(d2), d, DIGEST_LEN);
2851 
2852  log_info(LD_DIR, "Found an entry in %s with NULL "
2853  "router_get_by_extrainfo_digest() value. This has ID %s "
2854  "and EI digest %s.",
2855  old_routers?"old_routers":"routers",
2856  d1, d2);
2857  }
2858  ++n_bogus[old_routers];
2859  continue;
2860  }
2861  smartlist_add(wanted, d);
2862  }
2863  }
2864  digestmap_free(pending, NULL);
2865 
2866  log_info(LD_DIR, "Extrainfo download status: %d router with no ei, %d "
2867  "with present ei, %d delaying, %d pending, %d downloadable, %d "
2868  "bogus in routers, %d bogus in old_routers",
2869  n_no_ei, n_have, n_delay, n_pending, smartlist_len(wanted),
2870  n_bogus[0], n_bogus[1]);
2871 
2872  smartlist_shuffle(wanted);
2873 
2874  max_dl_per_req = max_dl_per_request(options, DIR_PURPOSE_FETCH_EXTRAINFO);
2875  for (i = 0; i < smartlist_len(wanted); i += max_dl_per_req) {
2877  wanted, i, i+max_dl_per_req,
2879  }
2880 
2881  smartlist_free(wanted);
2882 }
2883 
2884 /** Reset the consensus and extra-info download failure count on all routers.
2885  * When we get a new consensus,
2886  * routers_update_status_from_consensus_networkstatus() will reset the
2887  * download statuses on the descriptors in that consensus.
2888  */
2889 void
2891 {
2892  log_debug(LD_GENERAL,
2893  "In router_reset_descriptor_download_failures()");
2894 
2897  if (!routerlist)
2898  return;
2899  /* We want to download *all* extra-info descriptors, not just those in
2900  * the consensus we currently have (or are about to have) */
2902  {
2903  download_status_reset(&ri->cache_info.ei_dl_status);
2904  });
2906  {
2907  download_status_reset(&sd->ei_dl_status);
2908  });
2909 }
2910 
2911 /** Any changes in a router descriptor's publication time larger than this are
2912  * automatically non-cosmetic. */
2913 #define ROUTER_MAX_COSMETIC_TIME_DIFFERENCE (2*60*60)
2914 
2915 /** We allow uptime to vary from how much it ought to be by this much. */
2916 #define ROUTER_ALLOW_UPTIME_DRIFT (6*60*60)
2917 
2918 /** Return true iff the only differences between r1 and r2 are such that
2919  * would not cause a recent (post 0.1.1.6) dirserver to republish.
2920  */
2921 int
2923 {
2924  time_t r1pub, r2pub;
2925  time_t time_difference;
2926  tor_assert(r1 && r2);
2927 
2928  /* r1 should be the one that was published first. */
2929  if (r1->cache_info.published_on > r2->cache_info.published_on) {
2930  const routerinfo_t *ri_tmp = r2;
2931  r2 = r1;
2932  r1 = ri_tmp;
2933  }
2934 
2935  /* If any key fields differ, they're different. */
2936  if (!tor_addr_eq(&r1->ipv4_addr, &r2->ipv4_addr) ||
2937  strcasecmp(r1->nickname, r2->nickname) ||
2938  r1->ipv4_orport != r2->ipv4_orport ||
2939  !tor_addr_eq(&r1->ipv6_addr, &r2->ipv6_addr) ||
2940  r1->ipv6_orport != r2->ipv6_orport ||
2941  r1->ipv4_dirport != r2->ipv4_dirport ||
2942  r1->purpose != r2->purpose ||
2943  r1->onion_pkey_len != r2->onion_pkey_len ||
2944  !tor_memeq(r1->onion_pkey, r2->onion_pkey, r1->onion_pkey_len) ||
2946  strcasecmp(r1->platform, r2->platform) ||
2947  (r1->contact_info && !r2->contact_info) || /* contact_info is optional */
2948  (!r1->contact_info && r2->contact_info) ||
2949  (r1->contact_info && r2->contact_info &&
2950  strcasecmp(r1->contact_info, r2->contact_info)) ||
2951  r1->is_hibernating != r2->is_hibernating ||
2955  return 0;
2956  if ((r1->declared_family == NULL) != (r2->declared_family == NULL))
2957  return 0;
2958  if (r1->declared_family && r2->declared_family) {
2959  int i, n;
2960  if (smartlist_len(r1->declared_family)!=smartlist_len(r2->declared_family))
2961  return 0;
2962  n = smartlist_len(r1->declared_family);
2963  for (i=0; i < n; ++i) {
2964  if (strcasecmp(smartlist_get(r1->declared_family, i),
2965  smartlist_get(r2->declared_family, i)))
2966  return 0;
2967  }
2968  }
2969 
2970  /* Did bandwidth change a lot? */
2971  if ((r1->bandwidthcapacity < r2->bandwidthcapacity/2) ||
2972  (r2->bandwidthcapacity < r1->bandwidthcapacity/2))
2973  return 0;
2974 
2975  /* Did the bandwidthrate or bandwidthburst change? */
2976  if ((r1->bandwidthrate != r2->bandwidthrate) ||
2977  (r1->bandwidthburst != r2->bandwidthburst))
2978  return 0;
2979 
2980  /* Has enough time passed between the publication times? */
2982  < r2->cache_info.published_on)
2983  return 0;
2984 
2985  /* Did uptime fail to increase by approximately the amount we would think,
2986  * give or take some slop? */
2987  r1pub = r1->cache_info.published_on;
2988  r2pub = r2->cache_info.published_on;
2989  time_difference = r2->uptime - (r1->uptime + (r2pub - r1pub));
2990  if (time_difference < 0)
2991  time_difference = - time_difference;
2992  if (time_difference > ROUTER_ALLOW_UPTIME_DRIFT &&
2993  time_difference > r1->uptime * .05 &&
2994  time_difference > r2->uptime * .05)
2995  return 0;
2996 
2997  /* Otherwise, the difference is cosmetic. */
2998  return 1;
2999 }
3000 
3001 /** Check whether <b>sd</b> describes a router descriptor compatible with the
3002  * extrainfo document <b>ei</b>.
3003  *
3004  * <b>identity_pkey</b> (which must also be provided) is RSA1024 identity key
3005  * for the router. We use it to check the signature of the extrainfo document,
3006  * if it has not already been checked.
3007  *
3008  * If no router is compatible with <b>ei</b>, <b>ei</b> should be
3009  * dropped. Return 0 for "compatible", return 1 for "reject, and inform
3010  * whoever uploaded <b>ei</b>, and return -1 for "reject silently.". If
3011  * <b>msg</b> is present, set *<b>msg</b> to a description of the
3012  * incompatibility (if any).
3013  *
3014  * Set the extrainfo_is_bogus field in <b>sd</b> if the digests matched
3015  * but the extrainfo was nonetheless incompatible.
3016  **/
3017 int
3019  extrainfo_t *ei,
3020  signed_descriptor_t *sd,
3021  const char **msg)
3022 {
3023  int digest_matches, digest256_matches, r=1;
3024  tor_assert(identity_pkey);
3025  tor_assert(sd);
3026  tor_assert(ei);
3027 
3028  if (ei->bad_sig) {
3029  if (msg) *msg = "Extrainfo signature was bad, or signed with wrong key.";
3030  return 1;
3031  }
3032 
3033  digest_matches = tor_memeq(ei->cache_info.signed_descriptor_digest,
3035  /* Set digest256_matches to 1 if the digest is correct, or if no
3036  * digest256 was in the ri. */
3037  digest256_matches = tor_memeq(ei->digest256,
3039  digest256_matches |=
3041 
3042  /* The identity must match exactly to have been generated at the same time
3043  * by the same router. */
3044  if (tor_memneq(sd->identity_digest,
3045  ei->cache_info.identity_digest,
3046  DIGEST_LEN)) {
3047  if (msg) *msg = "Extrainfo nickname or identity did not match routerinfo";
3048  goto err; /* different servers */
3049  }
3050 
3052  ei->cache_info.signing_key_cert)) {
3053  if (msg) *msg = "Extrainfo signing key cert didn't match routerinfo";
3054  goto err; /* different servers */
3055  }
3056 
3057  if (ei->pending_sig) {
3058  char signed_digest[128];
3059  if (crypto_pk_public_checksig(identity_pkey,
3060  signed_digest, sizeof(signed_digest),
3061  ei->pending_sig, ei->pending_sig_len) != DIGEST_LEN ||
3062  tor_memneq(signed_digest, ei->cache_info.signed_descriptor_digest,
3063  DIGEST_LEN)) {
3064  ei->bad_sig = 1;
3065  tor_free(ei->pending_sig);
3066  if (msg) *msg = "Extrainfo signature bad, or signed with wrong key";
3067  goto err; /* Bad signature, or no match. */
3068  }
3069 
3070  ei->cache_info.send_unencrypted = sd->send_unencrypted;
3071  tor_free(ei->pending_sig);
3072  }
3073 
3074  if (ei->cache_info.published_on < sd->published_on) {
3075  if (msg) *msg = "Extrainfo published time did not match routerdesc";
3076  goto err;
3077  } else if (ei->cache_info.published_on > sd->published_on) {
3078  if (msg) *msg = "Extrainfo published time did not match routerdesc";
3079  r = -1;
3080  goto err;
3081  }
3082 
3083  if (!digest256_matches && !digest_matches) {
3084  if (msg) *msg = "Neither digest256 or digest matched "
3085  "digest from routerdesc";
3086  goto err;
3087  }
3088 
3089  if (!digest256_matches) {
3090  if (msg) *msg = "Extrainfo digest did not match digest256 from routerdesc";
3091  goto err; /* Digest doesn't match declared value. */
3092  }
3093 
3094  if (!digest_matches) {
3095  if (msg) *msg = "Extrainfo digest did not match value from routerdesc";
3096  goto err; /* Digest doesn't match declared value. */
3097  }
3098 
3099  return 0;
3100  err:
3101  if (digest_matches) {
3102  /* This signature was okay, and the digest was right: This is indeed the
3103  * corresponding extrainfo. But insanely, it doesn't match the routerinfo
3104  * that lists it. Don't try to fetch this one again. */
3105  sd->extrainfo_is_bogus = 1;
3106  }
3107 
3108  return r;
3109 }
3110 
3111 /* Does ri have a valid ntor onion key?
3112  * Valid ntor onion keys exist and have at least one non-zero byte. */
3113 int
3114 routerinfo_has_curve25519_onion_key(const routerinfo_t *ri)
3115 {
3116  if (!ri) {
3117  return 0;
3118  }
3119 
3120  if (!ri->onion_curve25519_pkey) {
3121  return 0;
3122  }
3123 
3124  if (fast_mem_is_zero((const char*)ri->onion_curve25519_pkey->public_key,
3126  return 0;
3127  }
3128 
3129  return 1;
3130 }
3131 
3132 /* Is rs running a tor version known to support EXTEND2 cells?
3133  * If allow_unknown_versions is true, return true if we can't tell
3134  * (from a versions line or a protocols line) whether it supports extend2
3135  * cells.
3136  * Otherwise, return false if the version is unknown. */
3137 int
3138 routerstatus_version_supports_extend2_cells(const routerstatus_t *rs,
3139  int allow_unknown_versions)
3140 {
3141  if (!rs) {
3142  return allow_unknown_versions;
3143  }
3144 
3145  if (!rs->pv.protocols_known) {
3146  return allow_unknown_versions;
3147  }
3148 
3149  return rs->pv.supports_extend2_cells;
3150 }
3151 
3152 /** Assert that the internal representation of <b>rl</b> is
3153  * self-consistent. */
3154 void
3156 {
3157  routerinfo_t *r2;
3158  signed_descriptor_t *sd2;
3159  if (!rl)
3160  return;
3162  r2 = rimap_get(rl->identity_map, r->cache_info.identity_digest);
3163  tor_assert(r == r2);
3164  sd2 = sdmap_get(rl->desc_digest_map,
3165  r->cache_info.signed_descriptor_digest);
3166  tor_assert(&(r->cache_info) == sd2);
3167  tor_assert(r->cache_info.routerlist_index == r_sl_idx);
3168  /* XXXX
3169  *
3170  * Hoo boy. We need to fix this one, and the fix is a bit tricky, so
3171  * commenting this out is just a band-aid.
3172  *
3173  * The problem is that, although well-behaved router descriptors
3174  * should never have the same value for their extra_info_digest, it's
3175  * possible for ill-behaved routers to claim whatever they like there.
3176  *
3177  * The real answer is to trash desc_by_eid_map and instead have
3178  * something that indicates for a given extra-info digest we want,
3179  * what its download status is. We'll do that as a part of routerlist
3180  * refactoring once consensus directories are in. For now,
3181  * this rep violation is probably harmless: an adversary can make us
3182  * reset our retry count for an extrainfo, but that's not the end
3183  * of the world. Changing the representation in 0.2.0.x would just
3184  * destabilize the codebase.
3185  if (!tor_digest_is_zero(r->cache_info.extra_info_digest)) {
3186  signed_descriptor_t *sd3 =
3187  sdmap_get(rl->desc_by_eid_map, r->cache_info.extra_info_digest);
3188  tor_assert(sd3 == &(r->cache_info));
3189  }
3190  */
3191  } SMARTLIST_FOREACH_END(r);
3193  r2 = rimap_get(rl->identity_map, sd->identity_digest);
3194  tor_assert(!r2 || sd != &(r2->cache_info));
3195  sd2 = sdmap_get(rl->desc_digest_map, sd->signed_descriptor_digest);
3196  tor_assert(sd == sd2);
3197  tor_assert(sd->routerlist_index == sd_sl_idx);
3198  /* XXXX see above.
3199  if (!tor_digest_is_zero(sd->extra_info_digest)) {
3200  signed_descriptor_t *sd3 =
3201  sdmap_get(rl->desc_by_eid_map, sd->extra_info_digest);
3202  tor_assert(sd3 == sd);
3203  }
3204  */
3205  } SMARTLIST_FOREACH_END(sd);
3206 
3207  RIMAP_FOREACH(rl->identity_map, d, r) {
3208  tor_assert(tor_memeq(r->cache_info.identity_digest, d, DIGEST_LEN));
3210  SDMAP_FOREACH(rl->desc_digest_map, d, sd) {
3211  tor_assert(tor_memeq(sd->signed_descriptor_digest, d, DIGEST_LEN));
3213  SDMAP_FOREACH(rl->desc_by_eid_map, d, sd) {
3215  tor_assert(sd);
3216  tor_assert(tor_memeq(sd->extra_info_digest, d, DIGEST_LEN));
3218  EIMAP_FOREACH(rl->extra_info_map, d, ei) {
3219  signed_descriptor_t *sd;
3220  tor_assert(tor_memeq(ei->cache_info.signed_descriptor_digest,
3221  d, DIGEST_LEN));
3222  sd = sdmap_get(rl->desc_by_eid_map,
3223  ei->cache_info.signed_descriptor_digest);
3224  // tor_assert(sd); // XXXX see above
3225  if (sd) {
3226  tor_assert(tor_memeq(ei->cache_info.signed_descriptor_digest,
3228  }
3230 }
3231 
3232 /** Allocate and return a new string representing the contact info
3233  * and platform string for <b>router</b>,
3234  * surrounded by quotes and using standard C escapes.
3235  *
3236  * THIS FUNCTION IS NOT REENTRANT. Don't call it from outside the main
3237  * thread. Also, each call invalidates the last-returned value, so don't
3238  * try log_warn(LD_GENERAL, "%s %s", esc_router_info(a), esc_router_info(b));
3239  *
3240  * If <b>router</b> is NULL, it just frees its internal memory and returns.
3241  */
3242 const char *
3244 {
3245  static char *info=NULL;
3246  char *esc_contact, *esc_platform;
3247  tor_free(info);
3248 
3249  if (!router)
3250  return NULL; /* we're exiting; just free the memory we use */
3251 
3252  esc_contact = esc_for_log(router->contact_info);
3253  esc_platform = esc_for_log(router->platform);
3254 
3255  tor_asprintf(&info, "Contact %s, Platform %s", esc_contact, esc_platform);
3256  tor_free(esc_contact);
3257  tor_free(esc_platform);
3258 
3259  return info;
3260 }
3261 
3262 /** Helper for sorting: compare two routerinfos by their identity
3263  * digest. */
3264 static int
3265 compare_routerinfo_by_id_digest_(const void **a, const void **b)
3266 {
3267  routerinfo_t *first = *(routerinfo_t **)a, *second = *(routerinfo_t **)b;
3268  return fast_memcmp(first->cache_info.identity_digest,
3269  second->cache_info.identity_digest,
3270  DIGEST_LEN);
3271 }
3272 
3273 /** Sort a list of routerinfo_t in ascending order of identity digest. */
3274 void
3276 {
3278 }
3279 
3280 /** Called when we change a node set, or when we reload the geoip IPv4 list:
3281  * recompute all country info in all configuration node sets and in the
3282  * routerlist. */
3283 void
3285 {
3286  const or_options_t *options = get_options();
3287 
3288  if (options->EntryNodes)
3290  if (options->ExitNodes)
3292  if (options->MiddleNodes)
3294  if (options->ExcludeNodes)
3296  if (options->ExcludeExitNodes)
3298  if (options->ExcludeExitNodesUnion_)
3300 
3302 }
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#define log_fn(severity, domain, args,...)
Definition: log.h:283
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Definition: routerlist.c:2114
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Definition: routerinfo_st.h:115
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Header file for networkstatus.c.
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Definition: or.h:163
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Definition: di_ops.c:107
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Header file for dirlist.c.
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Definition: bridges.c:928
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Definition: routerlist.c:1782
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Definition: routerinfo_st.h:50
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Header file for circuitlist.c.
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Header file for mainloop.c.
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Definition: digest_sizes.h:20
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Definition: or_options_st.h:130
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Definition: routerinfo_st.h:106
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Definition: signed_descriptor_st.h:37
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Definition: routerparse.c:394
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#define MIN_DL_PER_REQUEST
Definition: routerlist.c:2505
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Definition: routerlist.c:156
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Definition: routerlist.c:880
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Header for crypto_format.c.
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Definition: directory.h:39
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Definition: digestset.c:30
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Definition: signed_descriptor_st.h:44
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Header file for circuitbuild.c.
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Definition: process_descs.c:374
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Definition: routerlist_st.h:18
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Definition: networkstatus.c:1401
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tor_addr_t ipv4_addr
Definition: routerinfo_st.h:25
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#define LD_FS
Definition: log.h:70
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#define tor_memneq(a, b, sz)
Definition: di_ops.h:21
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#define RFTS_BIN
Definition: files.h:99
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int authdir_wants_to_reject_router(routerinfo_t *ri, const char **msg, int complain, int *valid_out)
Definition: process_descs.c:574
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void routerlist_retry_directory_downloads(time_t now)
Definition: routerlist.c:2315
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networkstatus_t * networkstatus_get_latest_consensus(void)
Definition: networkstatus.c:1390
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Definition: node_st.h:34
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void directory_request_set_routerstatus(directory_request_t *req, const routerstatus_t *status)
Definition: dirclient.c:1162
RFTS_IGNORE_MISSING
#define RFTS_IGNORE_MISSING
Definition: files.h:101
vote_routerstatus_st.h
Routerstatus (vote entry) structure.
router_reload_router_list_impl
static int router_reload_router_list_impl(desc_store_t *store)
Definition: routerlist.c:393
protover_summary_flags_t::supports_extend2_cells
unsigned int supports_extend2_cells
Definition: or.h:817
networkstatus_t::flavor
consensus_flavor_t flavor
Definition: networkstatus_st.h:28
routerlist_find_my_routerinfo
const routerinfo_t * routerlist_find_my_routerinfo(void)
Definition: routerlist.c:627
torcert.h
Header for torcert.c.
max_dl_per_request
static int max_dl_per_request(const or_options_t *options, int purpose)
Definition: routerlist.c:2476
vote_routerstatus_t
Definition: vote_routerstatus_st.h:18
signed_descriptor_reset
static void signed_descriptor_reset(signed_descriptor_t *sd)
Definition: routerlist.c:982
router_get_dl_status_by_descriptor_digest
download_status_t * router_get_dl_status_by_descriptor_digest(const char *d)
Definition: networkstatus.c:816
directory.h
Header file for directory.c.
routerstatus_t::published_on
time_t published_on
Definition: routerstatus_st.h:24
tor_digest_is_zero
int tor_digest_is_zero(const char *digest)
Definition: util_string.c:96
routerinfo_t::policy_is_reject_star
unsigned int policy_is_reject_star
Definition: routerinfo_st.h:77
or_options_t::ExcludeNodes
struct routerset_t * ExcludeNodes
Definition: or_options_st.h:120
networkstatus_reset_warnings
void networkstatus_reset_warnings(void)
Definition: networkstatus.c:193
extrainfo_t::pending_sig
char * pending_sig
Definition: extrainfo_st.h:29
smartlist_string_remove
void smartlist_string_remove(smartlist_t *sl, const char *element)
Definition: smartlist.c:74
networkstatus_get_reasonably_live_consensus
networkstatus_t * networkstatus_get_reasonably_live_consensus(time_t now, int flavor)
Definition: networkstatus.c:1477
routerlist_replace
static void routerlist_replace(routerlist_t *rl, routerinfo_t *ri_old, routerinfo_t *ri_new)
Definition: routerlist.c:1387
signed_descriptor_t::signed_descriptor_digest
char signed_descriptor_digest[DIGEST_LEN]
Definition: signed_descriptor_st.h:29
router_rebuild_store
static int router_rebuild_store(int flags, desc_store_t *store)
Definition: routerlist.c:239
desc_get_store
static desc_store_t * desc_get_store(routerlist_t *rl, const signed_descriptor_t *sd)
Definition: routerlist.c:186
dirclient_fetches_dir_info_early
int dirclient_fetches_dir_info_early(const or_options_t *options)
Definition: dirclient_modes.c:72
escaped
const char * escaped(const char *s)
Definition: escape.c:126
strcmpstart
int strcmpstart(const char *s1, const char *s2)
Definition: util_string.c:215
we_fetch_router_descriptors
int we_fetch_router_descriptors(const or_options_t *options)
Definition: microdesc.c:1075
SAVED_IN_JOURNAL
@ SAVED_IN_JOURNAL
Definition: or.h:761
smartlist_del
void smartlist_del(smartlist_t *sl, int idx)
Definition: smartlist_core.c:214
desc_store_t::fname_base
const char * fname_base
Definition: desc_store_st.h:27
networkstatus_voter_info_st.h
Single consensus voter structure.
signed_descriptor_free_
static void signed_descriptor_free_(signed_descriptor_t *sd)
Definition: routerlist.c:967
routerinfo_t::exit_policy
smartlist_t * exit_policy
Definition: routerinfo_st.h:59
download_status_t
Definition: download_status_st.h:41
routerlist_st.h
Router descriptor list structure.
authmode.h
Header file for directory authority mode.
get_connection_array
smartlist_t * get_connection_array(void)
Definition: mainloop.c:453
router_reset_descriptor_download_failures
void router_reset_descriptor_download_failures(void)
Definition: routerlist.c:2890
or_options_t::ExcludeExitNodes
struct routerset_t * ExcludeExitNodes
Definition: or_options_st.h:124
nodelist.h
Header file for nodelist.c.
DIR_PURPOSE_FETCH_EXTRAINFO
#define DIR_PURPOSE_FETCH_EXTRAINFO
Definition: directory.h:42
WRA_WAS_OUTDATED
static int WRA_WAS_OUTDATED(was_router_added_t s)
Definition: routerlist.h:116
routerlist.h
Header file for routerlist.c.
routerlist_t::desc_store
desc_store_t desc_store
Definition: routerlist_st.h:39
dir_server_t::fake_status
routerstatus_t fake_status
Definition: dir_server_st.h:51
networkstatus_voter_info_t
Definition: networkstatus_voter_info_st.h:16
routerset.h
Header file for routerset.c.
routerinfo_t::supports_tunnelled_dir_requests
unsigned int supports_tunnelled_dir_requests
Definition: routerinfo_st.h:86
PDS_NO_EXISTING_SERVERDESC_FETCH
#define PDS_NO_EXISTING_SERVERDESC_FETCH
Definition: node_select.h:67
initiate_descriptor_downloads
STATIC void initiate_descriptor_downloads(const routerstatus_t *source, int purpose, smartlist_t *digests, int lo, int hi, int pds_flags)
Definition: routerlist.c:2409
or_options_t::DownloadExtraInfo
int DownloadExtraInfo
Definition: or_options_st.h:645
routerinfo_t::declared_family
smartlist_t * declared_family
Definition: routerinfo_st.h:65
smartlist_contains_string
int smartlist_contains_string(const smartlist_t *sl, const char *element)
Definition: smartlist.c:93
node_has_curve25519_onion_key
int node_has_curve25519_onion_key(const node_t *node)
Definition: nodelist.c:1929
routerinfo_st.h
Router descriptor structure.
MIN_REQUESTS
#define MIN_REQUESTS
Definition: routerlist.c:2508
DIGEST256_LEN
#define DIGEST256_LEN
Definition: digest_sizes.h:23
dir_server_t
Definition: dir_server_st.h:21
routerlist_t::extra_info_map
struct digest_ei_map_t * extra_info_map
Definition: routerlist_st.h:26
node_select.h
Header file for node_select.c.
routerinfo_t::contact_info
char * contact_info
Definition: routerinfo_st.h:67
extendinfo.h
Header for core/or/extendinfo.c.
crypto_pk_public_checksig
int crypto_pk_public_checksig(const crypto_pk_t *env, char *to, size_t tolen, const char *from, size_t fromlen)
Definition: crypto_rsa_nss.c:513
networkstatus_t::routerstatus_list
smartlist_t * routerstatus_list
Definition: networkstatus_st.h:96
saved_location_t
saved_location_t
Definition: or.h:747
document_signature_st.h
Authority signature structure.
routers_update_status_from_consensus_networkstatus
void routers_update_status_from_consensus_networkstatus(smartlist_t *routers, int reset_failures)
Definition: networkstatus.c:2284
file_status
file_status_t file_status(const char *filename)
Definition: files.c:212
hex_digest_nickname_matches
int hex_digest_nickname_matches(const char *hexdigest, const char *identity_digest, const char *nickname)
Definition: routerlist.c:720
PDS_NO_EXISTING_MICRODESC_FETCH
#define PDS_NO_EXISTING_MICRODESC_FETCH
Definition: node_select.h:73
routerlist_descriptors_added
void routerlist_descriptors_added(smartlist_t *sl, int from_cache)
Definition: routerlist.c:2018
WRA_WAS_ADDED
static int WRA_WAS_ADDED(was_router_added_t s)
Definition: routerlist.h:106
protover_summary_flags_t::protocols_known
unsigned int protocols_known
Definition: or.h:813
connection_t
Definition: connection_st.h:45
node_allows_single_hop_exits
int node_allows_single_hop_exits(const node_t *node)
Definition: nodelist.c:1488
desc_store_t::type
store_type_t type
Definition: desc_store_st.h:33
router_get_by_extrainfo_digest
signed_descriptor_t * router_get_by_extrainfo_digest(const char *digest)
Definition: routerlist.c:797
routerstatus_t::pv
protover_summary_flags_t pv
Definition: routerstatus_st.h:68
LOG_INFO
#define LOG_INFO
Definition: log.h:45
signed_descriptor_t::ei_dl_status
download_status_t ei_dl_status
Definition: signed_descriptor_st.h:42
router_get_by_descriptor_digest
signed_descriptor_t * router_get_by_descriptor_digest(const char *digest)
Definition: routerlist.c:784
crypto_rand.h
Common functions for using (pseudo-)random number generators.
routerlist
static routerlist_t * routerlist
Definition: routerlist.c:147
control_events.h
Header file for control_events.c.
get_options
const or_options_t * get_options(void)
Definition: config.c:932
routerstatus_t::descriptor_digest
char descriptor_digest[DIGEST256_LEN]
Definition: routerstatus_st.h:31
desc_store_t::journal_len
size_t journal_len
Definition: desc_store_st.h:36
rep_hist_note_router_unreachable
void rep_hist_note_router_unreachable(const char *id, time_t when)
Definition: rephist.c:301
router_get_advertised_bandwidth
uint32_t router_get_advertised_bandwidth(const routerinfo_t *router)
Definition: routerlist.c:643
routerinfo_incompatible_with_extrainfo
int routerinfo_incompatible_with_extrainfo(const crypto_pk_t *identity_pkey, extrainfo_t *ei, signed_descriptor_t *sd, const char **msg)
Definition: routerlist.c:3018
SAVED_IN_CACHE
@ SAVED_IN_CACHE
Definition: or.h:754
or_options_t::ExitNodes
struct routerset_t * ExitNodes
Definition: or_options_st.h:108
signed_desc_append_to_journal
static int signed_desc_append_to_journal(signed_descriptor_t *desc, desc_store_t *store)
Definition: routerlist.c:198
routerlist_remove_old_cached_routers_with_id
static void routerlist_remove_old_cached_routers_with_id(time_t now, time_t cutoff, int lo, int hi, digestset_t *retain)
Definition: routerlist.c:1806
routerinfo_t::onion_pkey
char * onion_pkey
Definition: routerinfo_st.h:37
node_is_unreliable
int node_is_unreliable(const node_t *node, int need_uptime, int need_capacity, int need_guard)
Definition: nodelist.c:2255
MAX_NICKNAME_LEN
#define MAX_NICKNAME_LEN
Definition: or.h:112
or_options_t::MiddleNodes
struct routerset_t * MiddleNodes
Definition: or_options_st.h:111
smartlist_clear
void smartlist_clear(smartlist_t *sl)
Definition: smartlist_core.c:50
list_pending_descriptor_downloads
static void list_pending_descriptor_downloads(digestmap_t *result, int extrainfo)
Definition: routerlist.c:2385
directory_request_set_resource
void directory_request_set_resource(directory_request_t *req, const char *resource)
Definition: dirclient.c:1045
extrainfo_free_
void extrainfo_free_(extrainfo_t *extrainfo)
Definition: routerlist.c:950
signed_desc_digest_is_recognized
static int signed_desc_digest_is_recognized(signed_descriptor_t *desc)
Definition: routerlist.c:2286
firewall_is_fascist_dir
int firewall_is_fascist_dir(void)
Definition: policies.c:367
dirserv_single_reachability_test
void dirserv_single_reachability_test(time_t now, routerinfo_t *router)
Definition: reachability.c:130
compare_old_routers_by_identity_
static int compare_old_routers_by_identity_(const void **_a, const void **_b)
Definition: routerlist.c:1770
router_load_extrainfo_from_string
void router_load_extrainfo_from_string(const char *s, const char *eos, saved_location_t saved_location, smartlist_t *requested_fingerprints, int descriptor_digests)
Definition: routerlist.c:2213
routerlist_find_elt_
static int routerlist_find_elt_(smartlist_t *sl, void *ri, int idx)
Definition: routerlist.c:1083
signed_descriptor_t::signing_key_cert
struct tor_cert_st * signing_key_cert
Definition: signed_descriptor_st.h:39
nodelist_get_list
const smartlist_t * nodelist_get_list(void)
Definition: nodelist.c:967
tor_cert_opt_eq
int tor_cert_opt_eq(const tor_cert_t *cert1, const tor_cert_t *cert2)
Definition: torcert.c:315
trusteddirserver_get_by_v3_auth_digest
dir_server_t * trusteddirserver_get_by_v3_auth_digest(const char *digest)
Definition: dirlist.c:199
router_descriptor_is_older_than
int router_descriptor_is_older_than(const routerinfo_t *router, int seconds)
Definition: routerlist.c:1546
extrainfo_insert
STATIC was_router_added_t extrainfo_insert(routerlist_t *rl, extrainfo_t *ei, int warn_if_incompatible)
Definition: routerlist.c:1150
connection.h
Header file for connection.c.
directory_caches_dir_info
int directory_caches_dir_info(const or_options_t *options)
Definition: dirserv.c:94
router_parse_list_from_string
int router_parse_list_from_string(const char **s, const char *eos, smartlist_t *dest, saved_location_t saved_location, int want_extrainfo, int allow_annotations, const char *prepend_annotations, smartlist_t *invalid_digests_out)
Definition: routerparse.c:249
directory_request_new
directory_request_t * directory_request_new(uint8_t dir_purpose)
Definition: dirclient.c:948
signed_descriptor_get_annotations
const char * signed_descriptor_get_annotations(const signed_descriptor_t *desc)
Definition: routerlist.c:888
smartlist_shuffle
void smartlist_shuffle(smartlist_t *sl)
Definition: crypto_rand.c:602
extrainfo_st.h
A relay's extra-info structure.
networkstatus_t::valid_after
time_t valid_after
Definition: networkstatus_st.h:33
dirserv.h
Header file for dirserv.c.
server_mode
int server_mode(const or_options_t *options)
Definition: routermode.c:34
router_reset_status_download_failures
void router_reset_status_download_failures(void)
Definition: dirlist.c:135
download_status_is_ready
int download_status_is_ready(download_status_t *dls, time_t now)
Definition: dlstatus.c:381
update_extrainfo_downloads
void update_extrainfo_downloads(time_t now)
Definition: routerlist.c:2779
signed_descriptor_t::saved_offset
off_t saved_offset
Definition: signed_descriptor_st.h:47
dirclient.h
Header file for dirclient.c.
digestset_add
void digestset_add(digestset_t *set, const char *digest)
Definition: digestset.c:44
node_supports_v3_rendezvous_point
bool node_supports_v3_rendezvous_point(const node_t *node)
Definition: nodelist.c:1191
ROUTER_MAX_COSMETIC_TIME_DIFFERENCE
#define ROUTER_MAX_COSMETIC_TIME_DIFFERENCE
Definition: routerlist.c:2913
tor_asprintf
int tor_asprintf(char **strp, const char *fmt,...)
Definition: printf.c:75
networkstatus_reset_download_failures
void networkstatus_reset_download_failures(void)
Definition: networkstatus.c:206
smartlist_sort_digests
void smartlist_sort_digests(smartlist_t *sl)
Definition: smartlist.c:824
SMARTLIST_FOREACH_BEGIN
#define SMARTLIST_FOREACH_BEGIN(sl, type, var)
Definition: smartlist_foreach.h:78
dlstatus.h
Header file for dlstatus.c.
log_fn_ratelim
#define log_fn_ratelim(ratelim, severity, domain, args,...)
Definition: log.h:288
crypto_pk_t
Definition: crypto_rsa_nss.c:37
update_microdesc_downloads
void update_microdesc_downloads(time_t now)
Definition: microdesc.c:993
router_get_routerlist
routerlist_t * router_get_routerlist(void)
Definition: routerlist.c:895
fast_memcmp
#define fast_memcmp(a, b, c)
Definition: di_ops.h:28
dir_connection_st.h
Client/server directory connection structure.
list_pending_microdesc_downloads
void list_pending_microdesc_downloads(digest256map_t *result)
Definition: routerlist.c:2396
networkstatus_vote_find_mutable_entry
routerstatus_t * networkstatus_vote_find_mutable_entry(networkstatus_t *ns, const char *digest)
Definition: networkstatus.c:716
HEX_DIGEST_LEN
#define HEX_DIGEST_LEN
Definition: crypto_digest.h:35
or_options_t::UseBridges
int UseBridges
Definition: or_options_st.h:256
LOG_WARN
#define LOG_WARN
Definition: log.h:53
node_st.h
Node information structure.
router_get_my_extrainfo
extrainfo_t * router_get_my_extrainfo(void)
Definition: router.c:1838
extrainfo_t::bad_sig
unsigned int bad_sig
Definition: extrainfo_st.h:26
or_options_t::EntryNodes
struct routerset_t * EntryNodes
Definition: or_options_st.h:114
was_router_added_t
was_router_added_t
Definition: routerlist.h:17
compare_routerinfo_by_id_digest_
static int compare_routerinfo_by_id_digest_(const void **a, const void **b)
Definition: routerlist.c:3265
router_describe
const char * router_describe(const routerinfo_t *ri)
Definition: describe.c:137
policies.h
Header file for policies.c.
TO_DIR_CONN
dir_connection_t * TO_DIR_CONN(connection_t *c)
Definition: directory.c:89
update_consensus_router_descriptor_downloads
void update_consensus_router_descriptor_downloads(time_t now, int is_vote, networkstatus_t *consensus)
Definition: routerlist.c:2618
routerinfo_t::uptime
long uptime
Definition: routerinfo_st.h:64
ROUTER_ANNOTATION_BUF_LEN
#define ROUTER_ANNOTATION_BUF_LEN
Definition: or.h:804
dirclient_too_idle_to_fetch_descriptors
int dirclient_too_idle_to_fetch_descriptors(const or_options_t *options, time_t now)
Definition: dirclient_modes.c:94
config.h
Header file for config.c.
hexdigest_to_digest
int hexdigest_to_digest(const char *hexdigest, char *digest)
Definition: routerlist.c:749
router_is_me
int router_is_me(const routerinfo_t *router)
Definition: router.c:1752
PDS_RETRY_IF_NO_SERVERS
#define PDS_RETRY_IF_NO_SERVERS
Definition: node_select.h:54
router_get_advertised_bandwidth_capped
uint32_t router_get_advertised_bandwidth_capped(const routerinfo_t *router)
Definition: routerlist.c:657
routerlist_free_all
void routerlist_free_all(void)
Definition: routerlist.c:1515
reachable_addr_allows_node
int reachable_addr_allows_node(const node_t *node, firewall_connection_t fw_connection, int pref_only)
Definition: policies.c:690
routerlist_assert_ok
void routerlist_assert_ok(const routerlist_t *rl)
Definition: routerlist.c:3155
routerinfo_free_
void routerinfo_free_(routerinfo_t *router)
Definition: routerlist.c:920
client_would_use_router
int client_would_use_router(const routerstatus_t *rs, time_t now)
Definition: networkstatus.c:2607
esc_for_log
char * esc_for_log(const char *s)
Definition: escape.c:30
node_t::is_valid
unsigned int is_valid
Definition: node_st.h:65
tor_log
void tor_log(int severity, log_domain_mask_t domain, const char *format,...)
Definition: log.c:590
routerinfo_t::is_hibernating
unsigned int is_hibernating
Definition: routerinfo_st.h:68
router_add_running_nodes_to_smartlist
void router_add_running_nodes_to_smartlist(smartlist_t *sl, int flags)
Definition: routerlist.c:615
signed_descriptor_t::published_on
time_t published_on
Definition: signed_descriptor_st.h:33
router_get_mutable_by_digest
routerinfo_t * router_get_mutable_by_digest(const char *digest)
Definition: routerlist.c:762
should_delay_dir_fetches
int should_delay_dir_fetches(const or_options_t *options, const char **msg_out)
Definition: networkstatus.c:1253
ROUTER_PURPOSE_GENERAL
#define ROUTER_PURPOSE_GENERAL
Definition: routerinfo_st.h:98
signed_descriptor_t
Definition: signed_descriptor_st.h:18
or_options_t
Definition: or_options_st.h:64
addr_policies_eq
int addr_policies_eq(const smartlist_t *a, const smartlist_t *b)
Definition: policies.c:1304
refresh_all_country_info
void refresh_all_country_info(void)
Definition: routerlist.c:3284
signed_descriptor_t::routerlist_index
int routerlist_index
Definition: signed_descriptor_st.h:50
STATIC
#define STATIC
Definition: testsupport.h:32
compare_duration_idx_
static int compare_duration_idx_(const void *_d1, const void *_d2)
Definition: routerlist.c:1790
control_event_descriptors_changed
int control_event_descriptors_changed(smartlist_t *routers)
Definition: control_events.c:1448
signed_descriptor_t::signed_descriptor_body
char * signed_descriptor_body
Definition: signed_descriptor_st.h:22
signed_descriptor_t::signed_descriptor_len
size_t signed_descriptor_len
Definition: signed_descriptor_st.h:26
router_have_minimum_dir_info
int router_have_minimum_dir_info(void)
Definition: nodelist.c:2347
routerparse.h
Header file for routerparse.c.
routerinfo_t::nickname
char * nickname
Definition: routerinfo_st.h:22
LD_DIR
#define LD_DIR
Definition: log.h:88
networkstatus_st.h
Networkstatus consensus/vote structure.
smartlist_sort
void smartlist_sort(smartlist_t *sl, int(*compare)(const void **a, const void **b))
Definition: smartlist.c:334
directory_request_t
struct directory_request_t directory_request_t
Definition: dirclient.h:52
dirclient_modes.h
Header for feature/dirclient/dirclient_modes.c.
routerstatus_t::identity_digest
char identity_digest[DIGEST_LEN]
Definition: routerstatus_st.h:27
networkstatus_t
Definition: networkstatus_st.h:26
SAVED_NOWHERE
@ SAVED_NOWHERE
Definition: or.h:750
router_dir_info_changed
void router_dir_info_changed(void)
Definition: nodelist.c:2390
MAX_DL_TO_DELAY
#define MAX_DL_TO_DELAY
Definition: routerlist.c:2511
esc_router_info
const char * esc_router_info(const routerinfo_t *router)
Definition: routerlist.c:3243
node_has_preferred_descriptor
int node_has_preferred_descriptor(const node_t *node, int for_direct_connect)
Definition: nodelist.c:1420
routerinfo_t::bandwidthrate
uint32_t bandwidthrate
Definition: routerinfo_st.h:54
node_t::is_running
unsigned int is_running
Definition: node_st.h:63
smartlist_t
Definition: smartlist_core.h:26
smartlist_join_strings
char * smartlist_join_strings(smartlist_t *sl, const char *join, int terminate, size_t *len_out)
Definition: smartlist.c:279
tor_addr_eq
#define tor_addr_eq(a, b)
Definition: address.h:280
routerlist_remove
void routerlist_remove(routerlist_t *rl, routerinfo_t *ri, int make_old, time_t now)
Definition: routerlist.c:1275
routerlist_free_
void routerlist_free_(routerlist_t *rl)
Definition: routerlist.c:1028
rephist.h
Header file for rephist.c.
signed_descriptor_move
static void signed_descriptor_move(signed_descriptor_t *dest, signed_descriptor_t *src)
Definition: routerlist.c:993
router_add_to_routerlist
was_router_added_t router_add_to_routerlist(routerinfo_t *router, const char **msg, int from_cache, int from_fetch)
Definition: routerlist.c:1573
desc_store_t::mmap
tor_mmap_t * mmap
Definition: desc_store_st.h:31
authdir_mode
int authdir_mode(const or_options_t *options)
Definition: authmode.c:25
routerinfo_t::onion_curve25519_pkey
struct curve25519_public_key_t * onion_curve25519_pkey
Definition: routerinfo_st.h:43
routerlist_remove_old
static void routerlist_remove_old(routerlist_t *rl, signed_descriptor_t *sd, int idx)
Definition: routerlist.c:1334
ratelim_t
Definition: ratelim.h:42
or.h
Master header file for Tor-specific functionality.
routerinfo_t::cert_expiration_time
time_t cert_expiration_time
Definition: routerinfo_st.h:46
signed_descriptor_t::extra_info_digest
char extra_info_digest[DIGEST_LEN]
Definition: signed_descriptor_st.h:35