1 /* Copyright 2001 Matej Pfajfar.
2 * Copyright 2001-2004 Roger Dingledine.
3 * Copyright 2004-2005 Roger Dingledine, Nick Mathewson. */
4 /* See LICENSE for licensing information */
6 const char routerlist_c_id
[] =
12 * maintain and access the global list of routerinfos for known
18 /****************************************************************************/
20 /* static function prototypes */
21 static routerstatus_t
*router_pick_directory_server_impl(int requireother
,
23 int for_v2_directory
);
24 static routerstatus_t
*router_pick_trusteddirserver_impl(
25 int need_v1_authority
, int requireother
, int fascistfirewall
);
26 static void mark_all_trusteddirservers_up(void);
27 static int router_nickname_is_in_list(routerinfo_t
*router
, const char *list
);
28 static int router_nickname_matches(routerinfo_t
*router
, const char *nickname
);
29 static void routerstatus_list_update_from_networkstatus(time_t now
);
30 static void local_routerstatus_free(local_routerstatus_t
*rs
);
31 static void trusted_dir_server_free(trusted_dir_server_t
*ds
);
32 static void update_networkstatus_cache_downloads(time_t now
);
33 static void update_networkstatus_client_downloads(time_t now
);
34 static int signed_desc_digest_is_recognized(signed_descriptor_t
*desc
);
35 static void routerlist_assert_ok(routerlist_t
*rl
);
37 #define MAX_DESCRIPTORS_PER_ROUTER 5
39 /****************************************************************************/
41 /** Global list of a trusted_dir_server_t object for each trusted directory
43 static smartlist_t
*trusted_dir_servers
= NULL
;
45 /** Global list of all of the routers that we know about. */
46 static routerlist_t
*routerlist
= NULL
;
48 /** Global list of all of the current network_status documents that we know
49 * about. This list is kept sorted by published_on. */
50 static smartlist_t
*networkstatus_list
= NULL
;
52 /** Global list of local_routerstatus_t for each router, known or unknown. */
53 static smartlist_t
*routerstatus_list
= NULL
;
55 /** True iff any member of networkstatus_list has changed since the last time
56 * we called routerstatus_list_update_from_networkstatus(). */
57 static int networkstatus_list_has_changed
= 0;
59 /** True iff any element of routerstatus_list has changed since the last
60 * time we called routers_update_all_from_networkstatus().*/
61 static int routerstatus_list_has_changed
= 0;
63 /** List of strings for nicknames we've already warned about and that are
64 * still unknown / unavailable. */
65 static smartlist_t
*warned_nicknames
= NULL
;
67 /** List of strings for nicknames or fingerprints we've already warned about
68 * and that are still conflicted. */
69 static smartlist_t
*warned_conflicts
= NULL
;
71 /** The last time we tried to download any routerdesc, or 0 for "never". We
72 * use this to rate-limit download attempts when the number of routerdescs to
74 static time_t last_routerdesc_download_attempted
= 0;
76 /** The last time we tried to download a networkstatus, or 0 for "never". We
77 * use this to rate-limit download attempts for directory caches (including
78 * mirrors). Clients don't use this now. */
79 static time_t last_networkstatus_download_attempted
= 0;
82 static int have_warned_about_unverified_status
= 0;
83 static int have_warned_about_old_version
= 0;
84 static int have_warned_about_new_version
= 0;
86 /** Repopulate our list of network_status_t objects from the list cached on
87 * disk. Return 0 on success, -1 on failure. */
89 router_reload_networkstatus(void)
95 tor_assert(get_options()->DataDirectory
);
96 if (!networkstatus_list
)
97 networkstatus_list
= smartlist_create();
99 tor_snprintf(filename
,sizeof(filename
),"%s/cached-status",
100 get_options()->DataDirectory
);
101 entries
= tor_listdir(filename
);
102 SMARTLIST_FOREACH(entries
, const char *, fn
, {
103 char buf
[DIGEST_LEN
];
104 if (strlen(fn
) != HEX_DIGEST_LEN
||
105 base16_decode(buf
, sizeof(buf
), fn
, strlen(fn
))) {
107 "Skipping cached-status file with unexpected name \"%s\"",fn
);
110 tor_snprintf(filename
,sizeof(filename
),"%s/cached-status/%s",
111 get_options()->DataDirectory
, fn
);
112 s
= read_file_to_str(filename
, 0);
115 if (router_set_networkstatus(s
, st
.st_mtime
, NS_FROM_CACHE
, NULL
)<0) {
116 warn(LD_FS
, "Couldn't load networkstatus from \"%s\"",filename
);
121 SMARTLIST_FOREACH(entries
, char *, fn
, tor_free(fn
));
122 smartlist_free(entries
);
123 networkstatus_list_clean(time(NULL
));
124 routers_update_all_from_networkstatus();
128 /* Router descriptor storage.
130 * Routerdescs are stored in a big file, named "cached-routers". As new
131 * routerdescs arrive, we append them to a journal file named
132 * "cached-routers.new".
134 * From time to time, we replace "cached-routers" with a new file containing
135 * only the live, non-superseded descriptors, and clear cached-routers.new.
137 * On startup, we read both files.
140 /** The size of the router log, in bytes. */
141 static size_t router_journal_len
= 0;
142 /** The size of the router store, in bytes. */
143 static size_t router_store_len
= 0;
144 /** Total bytes dropped since last rebuild. */
145 static size_t router_bytes_dropped
= 0;
147 /** Helper: return 1 iff the router log is so big we want to rebuild the
150 router_should_rebuild_store(void)
152 if (router_store_len
> (1<<16))
153 return (router_journal_len
> router_store_len
/ 2 ||
154 router_bytes_dropped
> router_store_len
/ 2);
156 return router_journal_len
> (1<<15);
159 /** Add the <b>len</b>-type router descriptor in <b>s</b> to the router
162 router_append_to_journal(signed_descriptor_t
*desc
)
164 or_options_t
*options
= get_options();
165 size_t fname_len
= strlen(options
->DataDirectory
)+32;
166 char *fname
= tor_malloc(fname_len
);
167 const char *body
= signed_descriptor_get_body(desc
);
168 size_t len
= desc
->signed_descriptor_len
;
170 tor_snprintf(fname
, fname_len
, "%s/cached-routers.new",
171 options
->DataDirectory
);
173 tor_assert(len
== strlen(body
));
175 if (append_bytes_to_file(fname
, body
, len
, 0)) {
176 warn(LD_FS
, "Unable to store router descriptor");
182 router_journal_len
+= len
;
186 /** If the journal is too long, or if <b>force</b> is true, then atomically
187 * replace the router store with the routers currently in our routerlist, and
188 * clear the journal. Return 0 on success, -1 on failure.
191 router_rebuild_store(int force
)
194 or_options_t
*options
;
196 smartlist_t
*chunk_list
= NULL
;
200 if (!force
&& !router_should_rebuild_store())
205 /* Don't save deadweight. */
206 routerlist_remove_old_routers();
208 options
= get_options();
209 fname_len
= strlen(options
->DataDirectory
)+32;
210 fname
= tor_malloc(fname_len
);
211 tor_snprintf(fname
, fname_len
, "%s/cached-routers", options
->DataDirectory
);
212 chunk_list
= smartlist_create();
214 for (i
= 0; i
< 2; ++i
) {
215 smartlist_t
*lst
= (i
== 0) ? routerlist
->old_routers
:
217 SMARTLIST_FOREACH(lst
, void *, ptr
,
219 signed_descriptor_t
*sd
= (i
==0) ?
220 ((signed_descriptor_t
*)ptr
): &((routerinfo_t
*)ptr
)->cache_info
;
222 const char *body
= signed_descriptor_get_body(sd
);
224 warn(LD_BUG
, "Bug! No descriptor available for router.");
227 c
= tor_malloc(sizeof(sized_chunk_t
));
229 c
->len
= sd
->signed_descriptor_len
;
230 smartlist_add(chunk_list
, c
);
233 if (write_chunks_to_file(fname
, chunk_list
, 0)<0) {
234 warn(LD_FS
, "Error writing router store to disk.");
238 tor_snprintf(fname
, fname_len
, "%s/cached-routers.new",
239 options
->DataDirectory
);
241 write_str_to_file(fname
, "", 0);
244 router_store_len
= len
;
245 router_journal_len
= 0;
246 router_bytes_dropped
= 0;
250 SMARTLIST_FOREACH(chunk_list
, sized_chunk_t
*, c
, tor_free(c
));
251 smartlist_free(chunk_list
);
256 /* Load all cached router descriptors from the store. Return 0 on success and
260 router_reload_router_list(void)
262 or_options_t
*options
= get_options();
263 size_t fname_len
= strlen(options
->DataDirectory
)+32;
264 char *fname
= tor_malloc(fname_len
);
269 router_get_routerlist(); /* mallocs and inits it in place */
271 router_journal_len
= router_store_len
= 0;
273 for (j
= 0; j
< 2; ++j
) {
275 tor_snprintf(fname
, fname_len
,
276 (j
==0)?"%s/cached-routers":"%s/cached-routers.new",
277 options
->DataDirectory
);
278 contents
= read_file_to_str(fname
, 0);
282 router_store_len
= st
.st_size
;
284 router_journal_len
= st
.st_size
;
285 router_load_routers_from_string(contents
, 1, NULL
);
291 if (router_journal_len
) {
292 /* Always clear the journal on startup.*/
293 router_rebuild_store(1);
295 /* Don't cache expired routers. (This is in an else because
296 * router_rebuild_store() also calls remove_old_routers().) */
297 routerlist_remove_old_routers();
303 /** Set *<b>outp</b> to a smartlist containing a list of
304 * trusted_dir_server_t * for all known trusted dirservers. Callers
305 * must not modify the list or its contents.
308 router_get_trusted_dir_servers(smartlist_t
**outp
)
310 if (!trusted_dir_servers
)
311 trusted_dir_servers
= smartlist_create();
313 *outp
= trusted_dir_servers
;
316 /** Try to find a running dirserver. If there are no running dirservers
317 * in our routerlist and <b>retry_if_no_servers</b> is non-zero,
318 * set all the authoritative ones as running again, and pick one;
319 * if there are then no dirservers at all in our routerlist,
320 * reload the routerlist and try one last time. If for_runningrouters is
321 * true, then only pick a dirserver that can answer runningrouters queries
322 * (that is, a trusted dirserver, or one running 0.0.9rc5-cvs or later).
323 * Don't pick an authority if any non-authority is viable.
324 * Other args are as in router_pick_directory_server_impl().
327 router_pick_directory_server(int requireother
,
329 int for_v2_directory
,
330 int retry_if_no_servers
)
332 routerstatus_t
*choice
;
337 choice
= router_pick_directory_server_impl(requireother
, fascistfirewall
,
339 if (choice
|| !retry_if_no_servers
)
343 "No reachable router entries for dirservers. Trying them all again.");
344 /* mark all authdirservers as up again */
345 mark_all_trusteddirservers_up();
347 choice
= router_pick_directory_server_impl(requireother
, fascistfirewall
,
352 info(LD_DIR
,"Still no %s router entries. Reloading and trying again.",
353 fascistfirewall
? "reachable" : "known");
354 if (router_reload_router_list()) {
357 /* give it one last try */
358 choice
= router_pick_directory_server_impl(requireother
, fascistfirewall
,
363 /** Return the trusted_dir_server_t for the directory authority whose identity
364 * key hashes to <b>digest</b>, or NULL if no such authority is known.
366 trusted_dir_server_t
*
367 router_get_trusteddirserver_by_digest(const char *digest
)
369 if (!trusted_dir_servers
)
372 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ds
,
374 if (!memcmp(ds
->digest
, digest
, DIGEST_LEN
))
381 /** Try to find a running trusted dirserver. If there are no running
382 * trusted dirservers and <b>retry_if_no_servers</b> is non-zero,
383 * set them all as running again, and try again.
384 * If <b>need_v1_authority</b> is set, return only trusted servers
385 * that are authorities for the V1 directory protocol.
386 * Other args are as in router_pick_trusteddirserver_impl().
389 router_pick_trusteddirserver(int need_v1_authority
,
392 int retry_if_no_servers
)
394 routerstatus_t
*choice
;
396 choice
= router_pick_trusteddirserver_impl(need_v1_authority
,
397 requireother
, fascistfirewall
);
398 if (choice
|| !retry_if_no_servers
)
401 info(LD_DIR
,"No trusted dirservers are reachable. Trying them all again.");
402 mark_all_trusteddirservers_up();
403 return router_pick_trusteddirserver_impl(need_v1_authority
,
404 requireother
, fascistfirewall
);
407 /** Pick a random running verified directory server/mirror from our
408 * routerlist. Don't pick an authority if any non-authorities are viable.
409 * If <b>fascistfirewall</b>,
410 * make sure the router we pick is allowed by our firewall options.
411 * If <b>requireother</b>, it cannot be us. If <b>for_v2_directory</b>,
412 * choose a directory server new enough to support the v2 directory
415 static routerstatus_t
*
416 router_pick_directory_server_impl(int requireother
, int fascistfirewall
,
417 int for_v2_directory
)
419 routerstatus_t
*result
;
421 smartlist_t
*trusted
;
423 if (!routerstatus_list
)
426 /* Find all the running dirservers we know about. */
427 sl
= smartlist_create();
428 trusted
= smartlist_create();
429 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, _local_status
,
431 routerstatus_t
*status
= &(_local_status
->status
);
433 if (!status
->is_running
|| !status
->dir_port
|| !status
->is_valid
)
435 if (requireother
&& router_digest_is_me(status
->identity_digest
))
437 if (fascistfirewall
) {
438 if (!fascist_firewall_allows_address(status
->addr
, status
->dir_port
))
441 is_trusted
= router_digest_is_trusted_dir(status
->identity_digest
);
442 if (for_v2_directory
&& !(status
->is_v2_dir
|| is_trusted
))
444 smartlist_add(is_trusted
? trusted
: sl
, status
);
447 if (smartlist_len(sl
))
448 result
= smartlist_choose(sl
);
450 result
= smartlist_choose(trusted
);
452 smartlist_free(trusted
);
456 /** Choose randomly from among the trusted dirservers that are up. If
457 * <b>fascistfirewall</b>, make sure the port we pick is allowed by our
458 * firewall options. If <b>requireother</b>, it cannot be us. If
459 * <b>need_v1_authority</b>, choose a trusted authority for the v1 directory
462 static routerstatus_t
*
463 router_pick_trusteddirserver_impl(int need_v1_authority
,
464 int requireother
, int fascistfirewall
)
469 sl
= smartlist_create();
470 me
= router_get_my_routerinfo();
472 if (!trusted_dir_servers
)
475 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, d
,
477 if (!d
->is_running
) continue;
478 if (need_v1_authority
&& !d
->is_v1_authority
)
480 if (requireother
&& me
&& router_digest_is_me(d
->digest
))
482 if (fascistfirewall
) {
483 if (!fascist_firewall_allows_address(d
->addr
, d
->dir_port
))
486 smartlist_add(sl
, &d
->fake_status
);
489 rs
= smartlist_choose(sl
);
494 /** Go through and mark the authoritative dirservers as up. */
496 mark_all_trusteddirservers_up(void)
499 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
500 if (router_digest_is_trusted_dir(router
->cache_info
.identity_digest
) &&
501 router
->dir_port
> 0) {
502 router
->is_running
= 1;
505 if (trusted_dir_servers
) {
506 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, dir
,
508 local_routerstatus_t
*rs
;
510 dir
->n_networkstatus_failures
= 0;
511 rs
= router_get_combined_status_by_digest(dir
->digest
);
513 rs
->status
.is_running
= 1;
516 last_networkstatus_download_attempted
= 0;
519 /** Reset all internal variables used to count failed downloads of network
522 router_reset_status_download_failures(void)
524 mark_all_trusteddirservers_up();
528 /** Return 0 if \\exists an authoritative dirserver that's currently
529 * thought to be running, else return 1.
531 /* XXXX Nobody calls this function. Should it go away? */
533 all_trusted_directory_servers_down(void)
535 if (!trusted_dir_servers
)
537 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, dir
,
538 if (dir
->is_running
) return 0);
543 /** Add all the family of <b>router</b> to the smartlist <b>sl</b>.
544 * This is used to make sure we don't pick siblings in a single path.
547 routerlist_add_family(smartlist_t
*sl
, routerinfo_t
*router
)
552 if (!router
->declared_family
)
555 /* Add every r such that router declares familyness with r, and r
556 * declares familyhood with router. */
557 SMARTLIST_FOREACH(router
->declared_family
, const char *, n
,
559 if (!(r
= router_get_by_nickname(n
, 0)))
561 if (!r
->declared_family
)
563 SMARTLIST_FOREACH(r
->declared_family
, const char *, n2
,
565 if (router_nickname_matches(router
, n2
))
566 smartlist_add(sl
, r
);
570 /* If the user declared any families locally, honor those too. */
571 for (cl
= get_options()->NodeFamilies
; cl
; cl
= cl
->next
) {
572 if (router_nickname_is_in_list(router
, cl
->value
)) {
573 add_nickname_list_to_smartlist(sl
, cl
->value
, 0, 1, 1);
578 /** Given a comma-and-whitespace separated list of nicknames, see which
579 * nicknames in <b>list</b> name routers in our routerlist that are
580 * currently running. Add the routerinfos for those routers to <b>sl</b>.
583 add_nickname_list_to_smartlist(smartlist_t
*sl
, const char *list
,
585 int warn_if_down
, int warn_if_unnamed
)
587 routerinfo_t
*router
;
588 smartlist_t
*nickname_list
;
589 int have_dir_info
= router_have_minimum_dir_info();
592 return; /* nothing to do */
595 nickname_list
= smartlist_create();
596 if (!warned_nicknames
)
597 warned_nicknames
= smartlist_create();
599 smartlist_split_string(nickname_list
, list
, ",",
600 SPLIT_SKIP_SPACE
|SPLIT_IGNORE_BLANK
, 0);
602 SMARTLIST_FOREACH(nickname_list
, const char *, nick
, {
604 if (!is_legal_nickname_or_hexdigest(nick
)) {
605 warn(LD_CONFIG
, "Nickname '%s' is misformed; skipping", nick
);
608 router
= router_get_by_nickname(nick
, warn_if_unnamed
);
609 warned
= smartlist_string_isin(warned_nicknames
, nick
);
611 if (!must_be_running
|| router
->is_running
) {
612 smartlist_add(sl
,router
);
614 smartlist_string_remove(warned_nicknames
, nick
);
617 log_fn(warn_if_down
? LOG_WARN
: LOG_DEBUG
, LD_CONFIG
,
618 "Nickname list includes '%s' which is known but down.",nick
);
619 smartlist_add(warned_nicknames
, tor_strdup(nick
));
624 log_fn(have_dir_info
? LOG_WARN
: LOG_INFO
, LD_CONFIG
,
625 "Nickname list includes '%s' which isn't a known router.",nick
);
626 smartlist_add(warned_nicknames
, tor_strdup(nick
));
630 SMARTLIST_FOREACH(nickname_list
, char *, nick
, tor_free(nick
));
631 smartlist_free(nickname_list
);
634 /** Return 1 iff any member of the comma-separated list <b>list</b> is an
635 * acceptable nickname or hexdigest for <b>router</b>. Else return 0.
638 router_nickname_is_in_list(routerinfo_t
*router
, const char *list
)
640 smartlist_t
*nickname_list
;
644 return 0; /* definitely not */
647 nickname_list
= smartlist_create();
648 smartlist_split_string(nickname_list
, list
, ",",
649 SPLIT_SKIP_SPACE
|SPLIT_IGNORE_BLANK
, 0);
650 SMARTLIST_FOREACH(nickname_list
, const char *, cp
,
651 if (router_nickname_matches(router
, cp
)) {v
=1;break;});
652 SMARTLIST_FOREACH(nickname_list
, char *, cp
, tor_free(cp
));
653 smartlist_free(nickname_list
);
657 /** Add every router from our routerlist that is currently running to
661 router_add_running_routers_to_smartlist(smartlist_t
*sl
, int allow_unverified
,
662 int need_uptime
, int need_capacity
)
667 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
669 if (router
->is_running
&&
670 (router
->is_verified
||
672 !router_is_unreliable(router
, need_uptime
, need_capacity
)))) {
673 /* If it's running, and either it's verified or we're ok picking
674 * unverified routers and this one is suitable.
676 smartlist_add(sl
, router
);
681 /** Look through the routerlist until we find a router that has my key.
684 routerlist_find_my_routerinfo(void)
689 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
691 if (router_is_me(router
))
697 /** Find a router that's up, that has this IP address, and
698 * that allows exit to this address:port, or return NULL if there
702 router_find_exact_exit_enclave(const char *address
, uint16_t port
)
707 if (!tor_inet_aton(address
, &in
))
708 return NULL
; /* it's not an IP already */
709 addr
= ntohl(in
.s_addr
);
711 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
713 if (router
->is_running
&&
714 router
->addr
== addr
&&
715 router_compare_addr_to_addr_policy(addr
, port
, router
->exit_policy
) ==
716 ADDR_POLICY_ACCEPTED
)
722 /** Return 1 if <b>router</b> is not suitable for these parameters, else 0.
723 * If <b>need_uptime</b> is non-zero, we require a minimum uptime.
724 * If <b>need_capacity</b> is non-zero, we require a minimum advertised
728 router_is_unreliable(routerinfo_t
*router
, int need_uptime
, int need_capacity
)
730 if (need_uptime
&& !router
->is_stable
)
732 if (need_capacity
&& !router
->is_fast
)
737 /** Remove from routerlist <b>sl</b> all routers who have a low uptime. */
739 routerlist_sl_remove_unreliable_routers(smartlist_t
*sl
)
742 routerinfo_t
*router
;
744 for (i
= 0; i
< smartlist_len(sl
); ++i
) {
745 router
= smartlist_get(sl
, i
);
746 if (router_is_unreliable(router
, 1, 0)) {
747 // log(LOG_DEBUG, "Router '%s' has insufficient uptime; deleting.",
748 // router->nickname);
749 smartlist_del(sl
, i
--);
754 #define MAX_BELIEVABLE_BANDWIDTH 1500000 /* 1.5 MB/sec */
756 /** Choose a random element of router list <b>sl</b>, weighted by
757 * the advertised bandwidth of each router.
760 routerlist_sl_choose_by_bandwidth(smartlist_t
*sl
)
763 routerinfo_t
*router
;
764 smartlist_t
*bandwidths
;
765 uint32_t this_bw
, tmp
, total_bw
=0, rand_bw
;
768 /* First count the total bandwidth weight, and make a smartlist
770 bandwidths
= smartlist_create();
771 for (i
= 0; i
< smartlist_len(sl
); ++i
) {
772 router
= smartlist_get(sl
, i
);
773 this_bw
= (router
->bandwidthcapacity
< router
->bandwidthrate
) ?
774 router
->bandwidthcapacity
: router
->bandwidthrate
;
775 /* if they claim something huge, don't believe it */
776 if (this_bw
> MAX_BELIEVABLE_BANDWIDTH
)
777 this_bw
= MAX_BELIEVABLE_BANDWIDTH
;
778 p
= tor_malloc(sizeof(uint32_t));
780 smartlist_add(bandwidths
, p
);
784 SMARTLIST_FOREACH(bandwidths
, uint32_t*, p
, tor_free(p
));
785 smartlist_free(bandwidths
);
786 return smartlist_choose(sl
);
788 /* Second, choose a random value from the bandwidth weights. */
789 rand_bw
= crypto_rand_int(total_bw
);
790 /* Last, count through sl until we get to the element we picked */
793 tor_assert(i
< smartlist_len(sl
));
794 p
= smartlist_get(bandwidths
, i
);
799 SMARTLIST_FOREACH(bandwidths
, uint32_t*, p
, tor_free(p
));
800 smartlist_free(bandwidths
);
801 return (routerinfo_t
*)smartlist_get(sl
, i
);
804 /** Return a random running router from the routerlist. If any node
805 * named in <b>preferred</b> is available, pick one of those. Never
806 * pick a node named in <b>excluded</b>, or whose routerinfo is in
807 * <b>excludedsmartlist</b>, even if they are the only nodes
808 * available. If <b>strict</b> is true, never pick any node besides
809 * those in <b>preferred</b>.
810 * If <b>need_uptime</b> is non-zero and any router has more than
811 * a minimum uptime, return one of those.
812 * If <b>need_capacity</b> is non-zero, weight your choice by the
813 * advertised capacity of each router.
816 router_choose_random_node(const char *preferred
,
817 const char *excluded
,
818 smartlist_t
*excludedsmartlist
,
819 int need_uptime
, int need_capacity
,
820 int allow_unverified
, int strict
)
822 smartlist_t
*sl
, *excludednodes
;
823 routerinfo_t
*choice
= NULL
;
825 excludednodes
= smartlist_create();
826 add_nickname_list_to_smartlist(excludednodes
,excluded
,0,0,1);
828 /* Try the preferred nodes first. Ignore need_uptime and need_capacity,
829 * since the user explicitly asked for these nodes. */
831 sl
= smartlist_create();
832 add_nickname_list_to_smartlist(sl
,preferred
,1,1,1);
833 smartlist_subtract(sl
,excludednodes
);
834 if (excludedsmartlist
)
835 smartlist_subtract(sl
,excludedsmartlist
);
836 choice
= smartlist_choose(sl
);
839 if (!choice
&& !strict
) {
840 /* Then give up on our preferred choices: any node
841 * will do that has the required attributes. */
842 sl
= smartlist_create();
843 router_add_running_routers_to_smartlist(sl
, allow_unverified
,
844 need_uptime
, need_capacity
);
845 smartlist_subtract(sl
,excludednodes
);
846 if (excludedsmartlist
)
847 smartlist_subtract(sl
,excludedsmartlist
);
849 routerlist_sl_remove_unreliable_routers(sl
);
851 choice
= routerlist_sl_choose_by_bandwidth(sl
);
853 choice
= smartlist_choose(sl
);
855 if (!choice
&& (need_uptime
|| need_capacity
)) {
856 /* try once more -- recurse but with fewer restrictions. */
857 info(LD_CIRC
, "We couldn't find any live%s%s routers; falling back "
858 "to list of all routers.",
859 need_capacity
?", fast":"",
860 need_uptime
?", stable":"");
861 choice
= router_choose_random_node(
862 NULL
, excluded
, excludedsmartlist
, 0, 0, allow_unverified
, 0);
865 smartlist_free(excludednodes
);
867 warn(LD_CIRC
,"No available nodes when trying to choose node. Failing.");
871 /** Return true iff the digest of <b>router</b>'s identity key,
872 * encoded in hexadecimal, matches <b>hexdigest</b> (which is
873 * optionally prefixed with a single dollar sign). Return false if
874 * <b>hexdigest</b> is malformed, or it doesn't match. */
876 router_hex_digest_matches(routerinfo_t
*router
, const char *hexdigest
)
878 char digest
[DIGEST_LEN
];
879 tor_assert(hexdigest
);
880 if (hexdigest
[0] == '$')
883 /* XXXXNM Any place that uses this inside a loop could probably do better. */
884 if (strlen(hexdigest
) != HEX_DIGEST_LEN
||
885 base16_decode(digest
, DIGEST_LEN
, hexdigest
, HEX_DIGEST_LEN
)<0)
887 return (!memcmp(digest
, router
->cache_info
.identity_digest
, DIGEST_LEN
));
890 /** Return true if <b>router</b>'s nickname matches <b>nickname</b>
891 * (case-insensitive), or if <b>router's</b> identity key digest
892 * matches a hexadecimal value stored in <b>nickname</b>. Return
893 * false otherwise. */
895 router_nickname_matches(routerinfo_t
*router
, const char *nickname
)
897 if (nickname
[0]!='$' && !strcasecmp(router
->nickname
, nickname
))
899 return router_hex_digest_matches(router
, nickname
);
902 /** Return the router in our routerlist whose (case-insensitive)
903 * nickname or (case-sensitive) hexadecimal key digest is
904 * <b>nickname</b>. Return NULL if no such router is known.
907 router_get_by_nickname(const char *nickname
, int warn_if_unnamed
)
910 char digest
[DIGEST_LEN
];
911 routerinfo_t
*best_match
=NULL
;
914 tor_assert(nickname
);
917 if (nickname
[0] == '$')
918 return router_get_by_hexdigest(nickname
);
919 if (server_mode(get_options()) &&
920 !strcasecmp(nickname
, get_options()->Nickname
))
921 return router_get_my_routerinfo();
923 maybedigest
= (strlen(nickname
) == HEX_DIGEST_LEN
) &&
924 (base16_decode(digest
,DIGEST_LEN
,nickname
,HEX_DIGEST_LEN
) == 0);
926 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
928 if (!strcasecmp(router
->nickname
, nickname
)) {
929 if (router
->is_named
)
935 } else if (maybedigest
&&
936 !memcmp(digest
, router
->cache_info
.identity_digest
, DIGEST_LEN
)
943 if (warn_if_unnamed
&& n_matches
> 1) {
944 smartlist_t
*fps
= smartlist_create();
945 int any_unwarned
= 0;
946 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
948 local_routerstatus_t
*rs
;
951 char fp
[HEX_DIGEST_LEN
+1];
952 if (strcasecmp(router
->nickname
, nickname
))
954 rs
= router_get_combined_status_by_digest(
955 router
->cache_info
.identity_digest
);
956 if (!rs
->name_lookup_warned
) {
957 rs
->name_lookup_warned
= 1;
960 base16_encode(fp
, sizeof(fp
),
961 router
->cache_info
.identity_digest
, DIGEST_LEN
);
962 dlen
= 32 + HEX_DIGEST_LEN
+ strlen(router
->address
);
963 desc
= tor_malloc(dlen
);
964 tor_snprintf(desc
, dlen
, "\"$%s\" for the one at %s:%d",
965 fp
, router
->address
, router
->or_port
);
966 smartlist_add(fps
, desc
);
969 char *alternatives
= smartlist_join_strings(fps
, "; ",0,NULL
);
970 warn(LD_CONFIG
, "There are multiple matches for the nickname \"%s\","
971 " but none is listed as named by the directory authories. "
972 "Choosing one arbitrarily. If you meant one in particular, "
973 "you should say %s.", nickname
, alternatives
);
974 tor_free(alternatives
);
976 SMARTLIST_FOREACH(fps
, char *, cp
, tor_free(cp
));
978 } else if (warn_if_unnamed
) {
979 local_routerstatus_t
*rs
= router_get_combined_status_by_digest(
980 best_match
->cache_info
.identity_digest
);
981 if (rs
&& !rs
->name_lookup_warned
) {
982 char fp
[HEX_DIGEST_LEN
+1];
983 base16_encode(fp
, sizeof(fp
),
984 best_match
->cache_info
.identity_digest
, DIGEST_LEN
);
985 warn(LD_CONFIG
, "You specified a server \"%s\" by name, but the "
986 "directory authorities do not have a listing for this name. "
987 "To make sure you get the same server in the future, refer to "
988 "it by key, as \"$%s\".", nickname
, fp
);
989 rs
->name_lookup_warned
= 1;
998 /** Try to find a routerinfo for <b>digest</b>. If we don't have one,
999 * return 1. If we do, ask tor_version_as_new_as() for the answer.
1002 router_digest_version_as_new_as(const char *digest
, const char *cutoff
)
1004 routerinfo_t
*router
= router_get_by_digest(digest
);
1007 return tor_version_as_new_as(router
->platform
, cutoff
);
1010 /** Return true iff <b>digest</b> is the digest of the identity key of
1011 * a trusted directory. */
1013 router_digest_is_trusted_dir(const char *digest
)
1015 if (!trusted_dir_servers
)
1017 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ent
,
1018 if (!memcmp(digest
, ent
->digest
, DIGEST_LEN
)) return 1);
1022 /** Return the router in our routerlist whose hexadecimal key digest
1023 * is <b>hexdigest</b>. Return NULL if no such router is known. */
1025 router_get_by_hexdigest(const char *hexdigest
)
1027 char digest
[DIGEST_LEN
];
1029 tor_assert(hexdigest
);
1032 if (hexdigest
[0]=='$')
1034 if (strlen(hexdigest
) != HEX_DIGEST_LEN
||
1035 base16_decode(digest
,DIGEST_LEN
,hexdigest
,HEX_DIGEST_LEN
) < 0)
1038 return router_get_by_digest(digest
);
1041 /** Return the router in our routerlist whose 20-byte key digest
1042 * is <b>digest</b>. Return NULL if no such router is known. */
1044 router_get_by_digest(const char *digest
)
1048 if (!routerlist
) return NULL
;
1050 // routerlist_assert_ok(routerlist);
1052 return digestmap_get(routerlist
->identity_map
, digest
);
1055 /** Return the router in our routerlist whose 20-byte descriptor
1056 * is <b>digest</b>. Return NULL if no such router is known. */
1057 signed_descriptor_t
*
1058 router_get_by_descriptor_digest(const char *digest
)
1062 if (!routerlist
) return NULL
;
1064 return digestmap_get(routerlist
->desc_digest_map
, digest
);
1068 signed_descriptor_get_body(signed_descriptor_t
*desc
)
1070 return desc
->signed_descriptor_body
;
1073 /** Return the current list of all known routers. */
1075 router_get_routerlist(void)
1078 routerlist
= tor_malloc_zero(sizeof(routerlist_t
));
1079 routerlist
->routers
= smartlist_create();
1080 routerlist
->old_routers
= smartlist_create();
1081 routerlist
->identity_map
= digestmap_new();
1082 routerlist
->desc_digest_map
= digestmap_new();
1087 /** Free all storage held by <b>router</b>. */
1089 routerinfo_free(routerinfo_t
*router
)
1094 tor_free(router
->cache_info
.signed_descriptor_body
);
1095 tor_free(router
->address
);
1096 tor_free(router
->nickname
);
1097 tor_free(router
->platform
);
1098 tor_free(router
->contact_info
);
1099 if (router
->onion_pkey
)
1100 crypto_free_pk_env(router
->onion_pkey
);
1101 if (router
->identity_pkey
)
1102 crypto_free_pk_env(router
->identity_pkey
);
1103 if (router
->declared_family
) {
1104 SMARTLIST_FOREACH(router
->declared_family
, char *, s
, tor_free(s
));
1105 smartlist_free(router
->declared_family
);
1107 addr_policy_free(router
->exit_policy
);
1111 /** Release storage held by <b>sd</b>. */
1113 signed_descriptor_free(signed_descriptor_t
*sd
)
1115 tor_free(sd
->signed_descriptor_body
);
1119 /** Extract a signed_descriptor_t from a routerinfo, and free the routerinfo.
1121 static signed_descriptor_t
*
1122 signed_descriptor_from_routerinfo(routerinfo_t
*ri
)
1124 signed_descriptor_t
*sd
= tor_malloc_zero(sizeof(signed_descriptor_t
));
1125 memcpy(sd
, &(ri
->cache_info
), sizeof(signed_descriptor_t
));
1126 ri
->cache_info
.signed_descriptor_body
= NULL
;
1127 routerinfo_free(ri
);
1131 /** Free all storage held by a routerlist <b>rl</b> */
1133 routerlist_free(routerlist_t
*rl
)
1136 digestmap_free(rl
->identity_map
, NULL
);
1137 digestmap_free(rl
->desc_digest_map
, NULL
);
1138 SMARTLIST_FOREACH(rl
->routers
, routerinfo_t
*, r
,
1139 routerinfo_free(r
));
1140 SMARTLIST_FOREACH(rl
->old_routers
, signed_descriptor_t
*, sd
,
1141 signed_descriptor_free(sd
));
1142 smartlist_free(rl
->routers
);
1143 smartlist_free(rl
->old_routers
);
1148 dump_routerlist_mem_usage(int severity
)
1150 uint64_t livedescs
= 0;
1151 uint64_t olddescs
= 0;
1154 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, r
,
1155 livedescs
+= r
->cache_info
.signed_descriptor_len
);
1156 SMARTLIST_FOREACH(routerlist
->old_routers
, signed_descriptor_t
*, sd
,
1157 olddescs
+= sd
->signed_descriptor_len
);
1159 log(severity
, LD_GENERAL
,
1160 "In %d live descriptors: "U64_FORMAT
" bytes. "
1161 "In %d old descriptors: "U64_FORMAT
" bytes.",
1162 smartlist_len(routerlist
->routers
), U64_PRINTF_ARG(livedescs
),
1163 smartlist_len(routerlist
->old_routers
), U64_PRINTF_ARG(olddescs
));
1166 /** Return non-zero if we have a lot of extra descriptors in our
1167 * routerlist, and should get rid of some of them. Else return 0.
1169 * We should be careful to not return true too eagerly, since we
1170 * could churn. By using "+1" below, we make sure this function
1171 * only returns true at most every smartlist_len(rl-\>routers)
1175 routerlist_is_overfull(routerlist_t
*rl
)
1177 return smartlist_len(rl
->old_routers
) >
1178 smartlist_len(rl
->routers
)*(MAX_DESCRIPTORS_PER_ROUTER
+1);
1182 _routerlist_find_elt(smartlist_t
*sl
, void *ri
, int idx
)
1184 if (idx
< 0 || smartlist_get(sl
, idx
) != ri
) {
1186 SMARTLIST_FOREACH(sl
, routerinfo_t
*, r
,
1195 /** Insert an item <b>ri</b> into the routerlist <b>rl</b>, updating indices
1198 routerlist_insert(routerlist_t
*rl
, routerinfo_t
*ri
)
1200 digestmap_set(rl
->identity_map
, ri
->cache_info
.identity_digest
, ri
);
1201 digestmap_set(rl
->desc_digest_map
, ri
->cache_info
.signed_descriptor_digest
,
1203 smartlist_add(rl
->routers
, ri
);
1204 // routerlist_assert_ok(rl);
1208 routerlist_insert_old(routerlist_t
*rl
, routerinfo_t
*ri
)
1210 if (get_options()->DirPort
&&
1211 !digestmap_get(rl
->desc_digest_map
,
1212 ri
->cache_info
.signed_descriptor_digest
)) {
1213 signed_descriptor_t
*sd
= signed_descriptor_from_routerinfo(ri
);
1214 digestmap_set(rl
->desc_digest_map
, sd
->signed_descriptor_digest
, sd
);
1215 smartlist_add(rl
->old_routers
, sd
);
1217 routerinfo_free(ri
);
1219 // routerlist_assert_ok(rl);
1222 /** Remove an item <b>ri</b> into the routerlist <b>rl</b>, updating indices
1223 * as needed. If <b>idx</b> is nonnegative and smartlist_get(rl->routers,
1224 * idx) == ri, we don't need to do a linear search over the list to decide
1225 * which to remove. We fill the gap in rl->routers with a later element in
1226 * the list, if any exists. <b>ri</b> is freed. */
1228 routerlist_remove(routerlist_t
*rl
, routerinfo_t
*ri
, int idx
, int make_old
)
1230 routerinfo_t
*ri_tmp
;
1231 idx
= _routerlist_find_elt(rl
->routers
, ri
, idx
);
1234 smartlist_del(rl
->routers
, idx
);
1235 ri_tmp
= digestmap_remove(rl
->identity_map
, ri
->cache_info
.identity_digest
);
1236 tor_assert(ri_tmp
== ri
);
1237 if (make_old
&& get_options()->DirPort
) {
1238 signed_descriptor_t
*sd
;
1239 sd
= signed_descriptor_from_routerinfo(ri
);
1240 smartlist_add(rl
->old_routers
, sd
);
1241 digestmap_set(rl
->desc_digest_map
, sd
->signed_descriptor_digest
, sd
);
1243 ri_tmp
= digestmap_remove(rl
->desc_digest_map
,
1244 ri
->cache_info
.signed_descriptor_digest
);
1245 tor_assert(ri_tmp
== ri
);
1246 router_bytes_dropped
+= ri
->cache_info
.signed_descriptor_len
;
1247 routerinfo_free(ri
);
1249 // routerlist_assert_ok(rl);
1253 routerlist_remove_old(routerlist_t
*rl
, signed_descriptor_t
*sd
, int idx
)
1255 signed_descriptor_t
*sd_tmp
;
1256 idx
= _routerlist_find_elt(rl
->old_routers
, sd
, idx
);
1259 smartlist_del(rl
->old_routers
, idx
);
1260 sd_tmp
= digestmap_remove(rl
->desc_digest_map
,
1261 sd
->signed_descriptor_digest
);
1262 tor_assert(sd_tmp
== sd
);
1263 router_bytes_dropped
+= sd
->signed_descriptor_len
;
1264 signed_descriptor_free(sd
);
1265 // routerlist_assert_ok(rl);
1268 /** Remove <b>ri_old</b> from the routerlist <b>rl</b>, and replace it with
1269 * <b>ri_new</b>, updating all index info. If <b>idx</b> is nonnegative and
1270 * smartlist_get(rl->routers, idx) == ri, we don't need to do a linear
1271 * search over the list to decide which to remove. We put ri_new in the same
1272 * index as ri_old, if possible. ri is freed as appropriate. */
1274 routerlist_replace(routerlist_t
*rl
, routerinfo_t
*ri_old
,
1275 routerinfo_t
*ri_new
, int idx
, int make_old
)
1277 tor_assert(ri_old
!= ri_new
);
1278 idx
= _routerlist_find_elt(rl
->routers
, ri_old
, idx
);
1280 smartlist_set(rl
->routers
, idx
, ri_new
);
1282 warn(LD_BUG
, "Appending entry from routerlist_replace.");
1283 routerlist_insert(rl
, ri_new
);
1286 if (memcmp(ri_old
->cache_info
.identity_digest
,
1287 ri_new
->cache_info
.identity_digest
, DIGEST_LEN
)) {
1288 /* digests don't match; digestmap_set won't replace */
1289 digestmap_remove(rl
->identity_map
, ri_old
->cache_info
.identity_digest
);
1291 digestmap_set(rl
->identity_map
, ri_new
->cache_info
.identity_digest
, ri_new
);
1292 digestmap_set(rl
->desc_digest_map
,
1293 ri_new
->cache_info
.signed_descriptor_digest
, &(ri_new
->cache_info
));
1295 if (make_old
&& get_options()->DirPort
) {
1296 signed_descriptor_t
*sd
= signed_descriptor_from_routerinfo(ri_old
);
1297 smartlist_add(rl
->old_routers
, sd
);
1298 digestmap_set(rl
->desc_digest_map
, sd
->signed_descriptor_digest
, sd
);
1300 if (memcmp(ri_old
->cache_info
.signed_descriptor_digest
,
1301 ri_new
->cache_info
.signed_descriptor_digest
,
1303 /* digests don't match; digestmap_set didn't replace */
1304 digestmap_remove(rl
->desc_digest_map
,
1305 ri_old
->cache_info
.signed_descriptor_digest
);
1307 routerinfo_free(ri_old
);
1309 // routerlist_assert_ok(rl);
1312 /** Free all memory held by the routerlist module. */
1314 routerlist_free_all(void)
1317 routerlist_free(routerlist
);
1319 if (warned_nicknames
) {
1320 SMARTLIST_FOREACH(warned_nicknames
, char *, cp
, tor_free(cp
));
1321 smartlist_free(warned_nicknames
);
1322 warned_nicknames
= NULL
;
1324 if (warned_conflicts
) {
1325 SMARTLIST_FOREACH(warned_conflicts
, char *, cp
, tor_free(cp
));
1326 smartlist_free(warned_conflicts
);
1327 warned_conflicts
= NULL
;
1329 if (trusted_dir_servers
) {
1330 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ds
,
1331 trusted_dir_server_free(ds
));
1332 smartlist_free(trusted_dir_servers
);
1333 trusted_dir_servers
= NULL
;
1335 if (networkstatus_list
) {
1336 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
1337 networkstatus_free(ns
));
1338 smartlist_free(networkstatus_list
);
1339 networkstatus_list
= NULL
;
1341 if (routerstatus_list
) {
1342 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
1343 local_routerstatus_free(rs
));
1344 smartlist_free(routerstatus_list
);
1345 routerstatus_list
= NULL
;
1349 /** Free all storage held by the routerstatus object <b>rs</b>. */
1351 routerstatus_free(routerstatus_t
*rs
)
1356 /** Free all storage held by the local_routerstatus object <b>rs</b>. */
1358 local_routerstatus_free(local_routerstatus_t
*rs
)
1363 /** Free all storage held by the networkstatus object <b>ns</b>. */
1365 networkstatus_free(networkstatus_t
*ns
)
1367 tor_free(ns
->source_address
);
1368 tor_free(ns
->contact
);
1369 if (ns
->signing_key
)
1370 crypto_free_pk_env(ns
->signing_key
);
1371 tor_free(ns
->client_versions
);
1372 tor_free(ns
->server_versions
);
1374 SMARTLIST_FOREACH(ns
->entries
, routerstatus_t
*, rs
,
1375 routerstatus_free(rs
));
1376 smartlist_free(ns
->entries
);
1381 /** Forget that we have issued any router-related warnings, so that we'll
1382 * warn again if we see the same errors. */
1384 routerlist_reset_warnings(void)
1386 if (!warned_nicknames
)
1387 warned_nicknames
= smartlist_create();
1388 SMARTLIST_FOREACH(warned_nicknames
, char *, cp
, tor_free(cp
));
1389 smartlist_clear(warned_nicknames
); /* now the list is empty. */
1391 if (!warned_conflicts
)
1392 warned_conflicts
= smartlist_create();
1393 SMARTLIST_FOREACH(warned_conflicts
, char *, cp
, tor_free(cp
));
1394 smartlist_clear(warned_conflicts
); /* now the list is empty. */
1396 if (!routerstatus_list
)
1397 routerstatus_list
= smartlist_create();
1398 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
1399 rs
->name_lookup_warned
= 0);
1401 have_warned_about_unverified_status
= 0;
1402 have_warned_about_old_version
= 0;
1403 have_warned_about_new_version
= 0;
1406 /** Mark the router with ID <b>digest</b> as non-running in our routerlist. */
1408 router_mark_as_down(const char *digest
)
1410 routerinfo_t
*router
;
1411 local_routerstatus_t
*status
;
1414 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, d
,
1415 if (!memcmp(d
->digest
, digest
, DIGEST_LEN
))
1418 router
= router_get_by_digest(digest
);
1420 debug(LD_DIR
,"Marking router '%s' as down.",router
->nickname
);
1421 if (router_is_me(router
) && !we_are_hibernating())
1422 warn(LD_NET
, "We just marked ourself as down. Are your external "
1423 "addresses reachable?");
1424 router
->is_running
= 0;
1426 status
= router_get_combined_status_by_digest(digest
);
1428 status
->status
.is_running
= 0;
1432 /** Add <b>router</b> to the routerlist, if we don't already have it. Replace
1433 * older entries (if any) with the same key. Note: Callers should not hold
1434 * their pointers to <b>router</b> if this function fails; <b>router</b>
1435 * will either be inserted into the routerlist or freed.
1437 * Returns >= 0 if the router was added; less than 0 if it was not.
1439 * If we're returning non-zero, then assign to *<b>msg</b> a static string
1440 * describing the reason for not liking the routerinfo.
1442 * If the return value is less than -1, there was a problem with the
1443 * routerinfo. If the return value is equal to -1, then the routerinfo was
1444 * fine, but out-of-date. If the return value is equal to 1, the
1445 * routerinfo was accepted, but we should notify the generator of the
1446 * descriptor using the message *<b>msg</b>.
1448 * If <b>from_cache</b>, this descriptor came from our disk cache. If
1449 * <b>from_fetch</b>, we received it in response to a request we made.
1450 * (If both are false, that means it was uploaded to us as an auth dir
1451 * server or via the controller.)
1453 * This function should be called *after*
1454 * routers_update_status_from_networkstatus; subsequently, you should call
1455 * router_rebuild_store and control_event_descriptors_changed.
1457 * XXXX never replace your own descriptor.
1460 router_add_to_routerlist(routerinfo_t
*router
, const char **msg
,
1461 int from_cache
, int from_fetch
)
1464 char id_digest
[DIGEST_LEN
];
1465 int authdir
= get_options()->AuthoritativeDir
;
1466 int authdir_verified
= 0;
1471 router_get_routerlist();
1473 /* XXXX NM If this assert doesn't trigger, we should remove the id_digest
1475 crypto_pk_get_digest(router
->identity_pkey
, id_digest
);
1476 tor_assert(!memcmp(id_digest
, router
->cache_info
.identity_digest
,
1479 /* Make sure that we haven't already got this exact descriptor. */
1480 if (digestmap_get(routerlist
->desc_digest_map
,
1481 router
->cache_info
.signed_descriptor_digest
)) {
1482 info(LD_DIR
, "Dropping descriptor that we already have for router '%s'",
1484 *msg
= "Router descriptor was not new.";
1485 routerinfo_free(router
);
1489 if (routerlist_is_overfull(routerlist
))
1490 routerlist_remove_old_routers();
1493 if (authdir_wants_to_reject_router(router
, msg
,
1494 !from_cache
&& !from_fetch
)) {
1496 routerinfo_free(router
);
1499 authdir_verified
= router
->is_verified
;
1500 } else if (from_fetch
) {
1501 /* Only check the descriptor digest against the network statuses when
1502 * we are receiving in response to a fetch. */
1503 if (!signed_desc_digest_is_recognized(&router
->cache_info
)) {
1504 warn(LD_DIR
, "Dropping unrecognized descriptor for router '%s'",
1506 *msg
= "Router descriptor is not referenced by any network-status.";
1507 routerinfo_free(router
);
1512 /* If we have a router with this name, and the identity key is the same,
1513 * choose the newer one. If the identity key has changed, and one of the
1514 * routers is named, drop the unnamed ones. (If more than one are named,
1515 * drop the old ones.)
1517 for (i
= 0; i
< smartlist_len(routerlist
->routers
); ++i
) {
1518 routerinfo_t
*old_router
= smartlist_get(routerlist
->routers
, i
);
1519 if (!crypto_pk_cmp_keys(router
->identity_pkey
,old_router
->identity_pkey
)) {
1520 if (router
->cache_info
.published_on
<=
1521 old_router
->cache_info
.published_on
) {
1522 /* Same key, but old */
1523 debug(LD_DIR
, "Skipping not-new descriptor for router '%s'",
1525 routerlist_insert_old(routerlist
, router
);
1526 *msg
= "Router descriptor was not new.";
1529 /* Same key, new. */
1530 int unreachable
= 0;
1531 debug(LD_DIR
, "Replacing entry for router '%s/%s' [%s]",
1532 router
->nickname
, old_router
->nickname
,
1533 hex_str(id_digest
,DIGEST_LEN
));
1534 if (router
->addr
== old_router
->addr
&&
1535 router
->or_port
== old_router
->or_port
) {
1536 /* these carry over when the address and orport are unchanged.*/
1537 router
->last_reachable
= old_router
->last_reachable
;
1538 router
->testing_since
= old_router
->testing_since
;
1539 router
->num_unreachable_notifications
=
1540 old_router
->num_unreachable_notifications
;
1543 dirserv_thinks_router_is_blatantly_unreachable(router
,
1545 if (router
->num_unreachable_notifications
>= 3) {
1547 notice(LD_DIR
, "Notifying server '%s' that it's unreachable. "
1548 "(ContactInfo '%s', platform '%s').",
1550 router
->contact_info
? router
->contact_info
: "",
1551 router
->platform
? router
->platform
: "");
1553 info(LD_DIR
,"'%s' may be unreachable -- the %d previous "
1554 "descriptors were thought to be unreachable.",
1555 router
->nickname
, router
->num_unreachable_notifications
);
1556 router
->num_unreachable_notifications
++;
1559 routerlist_replace(routerlist
, old_router
, router
, i
, 1);
1561 router_append_to_journal(&router
->cache_info
);
1563 directory_set_dirty();
1564 *msg
= unreachable
? "Dirserver believes your ORPort is unreachable" :
1565 authdir_verified
? "Verified server updated" :
1566 ("Unverified server updated. (Have you sent us your key "
1568 return unreachable
? 1 : 0;
1570 } else if (!strcasecmp(router
->nickname
, old_router
->nickname
)) {
1571 /* nicknames match, keys don't. */
1572 if (router
->is_named
) {
1573 /* The new verified router replaces the old one; remove the
1574 * old one. And carry on to the end of the list, in case
1575 * there are more old unverified routers with this nickname
1577 /* mark-for-close connections using the old key, so we can
1578 * make new ones with the new key.
1581 while ((conn
= connection_or_get_by_identity_digest(
1582 old_router
->cache_info
.identity_digest
))) {
1583 // And LD_OR? XXXXNM
1584 info(LD_DIR
,"Closing conn to router '%s'; there is now a named "
1585 "router with that name.",
1586 old_router
->nickname
);
1587 connection_mark_for_close(conn
);
1589 routerlist_remove(routerlist
, old_router
, i
--, 0);
1590 } else if (old_router
->is_named
) {
1591 /* Can't replace a verified router with an unverified one. */
1592 debug(LD_DIR
, "Skipping unverified entry for verified router '%s'",
1594 routerinfo_free(router
);
1596 "Already have named router with same nickname and different key.";
1601 /* We haven't seen a router with this name before. Add it to the end of
1603 routerlist_insert(routerlist
, router
);
1605 router_append_to_journal(&router
->cache_info
);
1606 directory_set_dirty();
1611 _compare_old_routers_by_identity(const void **_a
, const void **_b
)
1614 const signed_descriptor_t
*r1
= *_a
, *r2
= *_b
;
1615 if ((i
= memcmp(r1
->identity_digest
, r2
->identity_digest
, DIGEST_LEN
)))
1617 return r1
->published_on
- r2
->published_on
;
1620 struct duration_idx_t
{
1627 _compare_duration_idx(const void *_d1
, const void *_d2
)
1629 const struct duration_idx_t
*d1
= _d1
;
1630 const struct duration_idx_t
*d2
= _d2
;
1631 return d1
->duration
- d2
->duration
;
1634 /** The range <b>lo</b> through <b>hi</b> inclusive of routerlist->old_routers
1635 * must contain routerinfo_t with the same identity and with publication time
1636 * in ascending order. Remove members from this range until there are no more
1637 * than MAX_DESCRIPTORS_PER_ROUTER remaining. Start by removing the oldest
1638 * members from before <b>cutoff</b>, then remove members which were current
1639 * for the lowest amount of time. The order of members of old_routers at
1640 * indices <b>lo</b> or higher may be changed.
1643 routerlist_remove_old_cached_routers_with_id(time_t cutoff
, int lo
, int hi
,
1644 digestmap_t
*retain
)
1646 int i
, n
= hi
-lo
+1, n_extra
;
1648 struct duration_idx_t
*lifespans
;
1649 uint8_t *rmv
, *must_keep
;
1650 smartlist_t
*lst
= routerlist
->old_routers
;
1653 tor_assert(hi
< smartlist_len(lst
));
1654 tor_assert(lo
<= hi
);
1655 ident
= ((signed_descriptor_t
*)smartlist_get(lst
, lo
))->identity_digest
;
1656 for (i
= lo
+1; i
<= hi
; ++i
) {
1657 signed_descriptor_t
*r
= smartlist_get(lst
, i
);
1658 tor_assert(!memcmp(ident
, r
->identity_digest
, DIGEST_LEN
));
1662 /* Check whether we need to do anything at all. */
1663 n_extra
= n
- MAX_DESCRIPTORS_PER_ROUTER
;
1667 lifespans
= tor_malloc_zero(sizeof(struct duration_idx_t
)*n
);
1668 rmv
= tor_malloc_zero(sizeof(uint8_t)*n
);
1669 must_keep
= tor_malloc_zero(sizeof(uint8_t)*n
);
1670 /* Set lifespans to contain the lifespan and index of each server. */
1671 /* Set rmv[i-lo]=1 if we're going to remove a server for being too old. */
1672 for (i
= lo
; i
<= hi
; ++i
) {
1673 signed_descriptor_t
*r
= smartlist_get(lst
, i
);
1674 signed_descriptor_t
*r_next
;
1675 lifespans
[i
-lo
].idx
= i
;
1676 if (retain
&& digestmap_get(retain
, r
->signed_descriptor_digest
)) {
1677 must_keep
[i
-lo
] = 1;
1680 r_next
= smartlist_get(lst
, i
+1);
1681 tor_assert(r
->published_on
<= r_next
->published_on
);
1682 lifespans
[i
-lo
].duration
= (r_next
->published_on
- r
->published_on
);
1685 lifespans
[i
-lo
].duration
= INT_MAX
;
1687 if (!must_keep
[i
-lo
] && r
->published_on
< cutoff
&& n_rmv
< n_extra
) {
1689 lifespans
[i
-lo
].old
= 1;
1694 if (n_rmv
< n_extra
) {
1696 * We aren't removing enough servers for being old. Sort lifespans by
1697 * the duration of liveness, and remove the ones we're not already going to
1698 * remove based on how long they were alive.
1700 qsort(lifespans
, n
, sizeof(struct duration_idx_t
), _compare_duration_idx
);
1701 for (i
= 0; i
< n
&& n_rmv
< n_extra
; ++i
) {
1702 if (!must_keep
[lifespans
[i
].idx
-lo
] && !lifespans
[i
].old
) {
1703 rmv
[lifespans
[i
].idx
-lo
] = 1;
1709 for (i
= hi
; i
>= lo
; --i
) {
1711 routerlist_remove_old(routerlist
, smartlist_get(lst
, i
), i
);
1713 tor_free(must_keep
);
1715 tor_free(lifespans
);
1718 /** Deactivate any routers from the routerlist that are more than
1719 * ROUTER_MAX_AGE seconds old; remove old routers from the list of
1720 * cached routers if we have too many.
1723 routerlist_remove_old_routers(void)
1726 const char *cur_id
= NULL
;
1728 routerinfo_t
*router
;
1729 signed_descriptor_t
*sd
;
1730 digestmap_t
*retain
;
1731 or_options_t
*options
= get_options();
1732 if (!routerlist
|| !networkstatus_list
)
1735 retain
= digestmap_new();
1736 if (server_mode(options
) && options
->DirPort
) {
1737 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
1739 SMARTLIST_FOREACH(ns
->entries
, routerstatus_t
*, rs
,
1740 digestmap_set(retain
, rs
->descriptor_digest
, (void*)1));
1745 cutoff
= now
- ROUTER_MAX_AGE
;
1746 /* Remove too-old members of routerlist->routers. */
1747 for (i
= 0; i
< smartlist_len(routerlist
->routers
); ++i
) {
1748 router
= smartlist_get(routerlist
->routers
, i
);
1749 if (router
->cache_info
.published_on
<= cutoff
&&
1750 !digestmap_get(retain
, router
->cache_info
.signed_descriptor_digest
)) {
1751 /* Too old. Remove it. */
1752 info(LD_DIR
, "Forgetting obsolete (too old) routerinfo for router '%s'",
1754 routerlist_remove(routerlist
, router
, i
--, 1);
1758 /* Remove far-too-old members of routerlist->old_routers. */
1759 cutoff
= now
- OLD_ROUTER_DESC_MAX_AGE
;
1760 for (i
= 0; i
< smartlist_len(routerlist
->old_routers
); ++i
) {
1761 sd
= smartlist_get(routerlist
->old_routers
, i
);
1762 if (sd
->published_on
<= cutoff
&&
1763 !digestmap_get(retain
, sd
->signed_descriptor_digest
)) {
1764 /* Too old. Remove it. */
1765 routerlist_remove_old(routerlist
, sd
, i
--);
1769 /* Now we're looking at routerlist->old_routers for extraneous
1770 * members. (We'd keep all the members if we could, but we'd like to save
1771 * space.) First, check whether we have too many router descriptors, total.
1772 * We're okay with having too many for some given router, so long as the
1773 * total number doesn't approach MAX_DESCRIPTORS_PER_ROUTER*len(router).
1775 if (smartlist_len(routerlist
->old_routers
) <
1776 smartlist_len(routerlist
->routers
) * (MAX_DESCRIPTORS_PER_ROUTER
- 1))
1779 smartlist_sort(routerlist
->old_routers
, _compare_old_routers_by_identity
);
1781 /* Iterate through the list from back to front, so when we remove descriptors
1782 * we don't mess up groups we haven't gotten to. */
1783 for (i
= smartlist_len(routerlist
->old_routers
)-1; i
>= 0; --i
) {
1784 signed_descriptor_t
*r
= smartlist_get(routerlist
->old_routers
, i
);
1786 cur_id
= r
->identity_digest
;
1789 if (memcmp(cur_id
, r
->identity_digest
, DIGEST_LEN
)) {
1790 routerlist_remove_old_cached_routers_with_id(cutoff
, i
+1, hi
, retain
);
1791 cur_id
= r
->identity_digest
;
1796 routerlist_remove_old_cached_routers_with_id(cutoff
, 0, hi
, retain
);
1797 routerlist_assert_ok(routerlist
);
1800 digestmap_free(retain
, NULL
);
1804 * Code to parse a single router descriptor and insert it into the
1805 * routerlist. Return -1 if the descriptor was ill-formed; 0 if the
1806 * descriptor was well-formed but could not be added; and 1 if the
1807 * descriptor was added.
1809 * If we don't add it and <b>msg</b> is not NULL, then assign to
1810 * *<b>msg</b> a static string describing the reason for refusing the
1813 * This is used only by the controller.
1816 router_load_single_router(const char *s
, const char **msg
)
1823 if (!(ri
= router_parse_entry_from_string(s
, NULL
))) {
1824 warn(LD_DIR
, "Error parsing router descriptor; dropping.");
1825 *msg
= "Couldn't parse router descriptor.";
1828 if (router_is_me(ri
)) {
1829 warn(LD_DIR
, "Router's identity key matches mine; dropping.");
1830 *msg
= "Router's identity key matches mine.";
1831 routerinfo_free(ri
);
1835 lst
= smartlist_create();
1836 smartlist_add(lst
, ri
);
1837 routers_update_status_from_networkstatus(lst
, 0);
1839 if (router_add_to_routerlist(ri
, msg
, 0, 0)<0) {
1840 warn(LD_DIR
, "Couldn't add router to list: %s Dropping.",
1841 *msg
?*msg
:"(No message).");
1842 /* we've already assigned to *msg now, and ri is already freed */
1843 smartlist_free(lst
);
1846 control_event_descriptors_changed(lst
);
1847 smartlist_free(lst
);
1848 debug(LD_DIR
, "Added router to list");
1853 /** Given a string <b>s</b> containing some routerdescs, parse it and put the
1854 * routers into our directory. If <b>from_cache</b> is false, the routers
1855 * are in response to a query to the network: cache them.
1857 * If <b>requested_fingerprints</b> is provided, it must contain a list of
1858 * uppercased identity fingerprints. Do not update any router whose
1859 * fingerprint is not on the list; after updating a router, remove its
1860 * fingerprint from the list.
1863 router_load_routers_from_string(const char *s
, int from_cache
,
1864 smartlist_t
*requested_fingerprints
)
1866 smartlist_t
*routers
= smartlist_create(), *changed
= smartlist_create();
1867 char fp
[HEX_DIGEST_LEN
+1];
1870 router_parse_list_from_string(&s
, routers
);
1872 routers_update_status_from_networkstatus(routers
, !from_cache
);
1874 info(LD_DIR
, "%d elements to add", smartlist_len(routers
));
1876 SMARTLIST_FOREACH(routers
, routerinfo_t
*, ri
,
1878 base16_encode(fp
, sizeof(fp
), ri
->cache_info
.signed_descriptor_digest
,
1880 if (requested_fingerprints
) {
1881 if (smartlist_string_isin(requested_fingerprints
, fp
)) {
1882 smartlist_string_remove(requested_fingerprints
, fp
);
1885 smartlist_join_strings(requested_fingerprints
," ",0,NULL
);
1887 "We received a router descriptor with a fingerprint (%s) "
1888 "that we never requested. (We asked for: %s.) Dropping.",
1890 tor_free(requested
);
1891 routerinfo_free(ri
);
1896 if (router_add_to_routerlist(ri
, &msg
, from_cache
, !from_cache
) >= 0)
1897 smartlist_add(changed
, ri
);
1900 if (smartlist_len(changed
))
1901 control_event_descriptors_changed(changed
);
1903 routerlist_assert_ok(routerlist
);
1904 router_rebuild_store(0);
1906 smartlist_free(routers
);
1907 smartlist_free(changed
);
1910 /** Helper: return a newly allocated string containing the name of the filename
1911 * where we plan to cache <b>ns</b>. */
1913 networkstatus_get_cache_filename(const networkstatus_t
*ns
)
1915 const char *datadir
= get_options()->DataDirectory
;
1916 size_t len
= strlen(datadir
)+64;
1917 char fp
[HEX_DIGEST_LEN
+1];
1918 char *fn
= tor_malloc(len
+1);
1919 base16_encode(fp
, HEX_DIGEST_LEN
+1, ns
->identity_digest
, DIGEST_LEN
);
1920 tor_snprintf(fn
, len
, "%s/cached-status/%s",datadir
,fp
);
1924 /** Helper for smartlist_sort: Compare two networkstatus objects by
1925 * publication date. */
1927 _compare_networkstatus_published_on(const void **_a
, const void **_b
)
1929 const networkstatus_t
*a
= *_a
, *b
= *_b
;
1930 if (a
->published_on
< b
->published_on
)
1932 else if (a
->published_on
> b
->published_on
)
1938 /** Add the parsed neworkstatus in <b>ns</b> (with original document in
1939 * <b>s</b> to the disk cache (and the in-memory directory server cache) as
1942 add_networkstatus_to_cache(const char *s
,
1943 networkstatus_source_t source
,
1944 networkstatus_t
*ns
)
1946 if (source
!= NS_FROM_CACHE
) {
1947 char *fn
= networkstatus_get_cache_filename(ns
);
1948 if (write_str_to_file(fn
, s
, 0)<0) {
1949 notice(LD_FS
, "Couldn't write cached network status to \"%s\"", fn
);
1954 if (get_options()->DirPort
)
1955 dirserv_set_cached_networkstatus_v2(s
,
1956 ns
->identity_digest
,
1962 /** How far in the future do we allow a network-status to get before removing
1964 #define NETWORKSTATUS_ALLOW_SKEW (48*60*60)
1965 /** Given a string <b>s</b> containing a network status that we received at
1966 * <b>arrived_at</b> from <b>source</b>, try to parse it, see if we want to
1967 * store it, and put it into our cache is necessary.
1969 * If <b>source</b> is NS_FROM_DIR or NS_FROM_CACHE, do not replace our
1970 * own networkstatus_t (if we're a directory server).
1972 * If <b>source</b> is NS_FROM_CACHE, do not write our networkstatus_t to the
1975 * If <b>requested_fingerprints</b> is provided, it must contain a list of
1976 * uppercased identity fingerprints. Do not update any networkstatus whose
1977 * fingerprint is not on the list; after updating a networkstatus, remove its
1978 * fingerprint from the list.
1980 * Return 0 on success, -1 on failure.
1982 * Callers should make sure that routers_update_all_from_networkstatus() is
1983 * invoked after this function succeeds.
1986 router_set_networkstatus(const char *s
, time_t arrived_at
,
1987 networkstatus_source_t source
, smartlist_t
*requested_fingerprints
)
1989 networkstatus_t
*ns
;
1993 trusted_dir_server_t
*trusted_dir
= NULL
;
1994 const char *source_desc
= NULL
;
1995 char fp
[HEX_DIGEST_LEN
+1];
1996 char published
[ISO_TIME_LEN
+1];
1998 ns
= networkstatus_parse_from_string(s
);
2000 warn(LD_DIR
, "Couldn't parse network status.");
2003 base16_encode(fp
, HEX_DIGEST_LEN
+1, ns
->identity_digest
, DIGEST_LEN
);
2005 router_get_trusteddirserver_by_digest(ns
->identity_digest
))) {
2006 info(LD_DIR
, "Network status was signed, but not by an authoritative "
2007 "directory we recognize.");
2008 if (!get_options()->DirPort
) {
2009 networkstatus_free(ns
);
2014 source_desc
= trusted_dir
->description
;
2017 if (arrived_at
> now
)
2020 ns
->received_on
= arrived_at
;
2022 format_iso_time(published
, ns
->published_on
);
2024 if (ns
->published_on
> now
+ NETWORKSTATUS_ALLOW_SKEW
) {
2025 warn(LD_GENERAL
, "Network status from %s was published in the future "
2026 "(%s GMT). Somebody is skewed here: check your clock. Not caching.",
2027 source_desc
, published
);
2031 if (!networkstatus_list
)
2032 networkstatus_list
= smartlist_create();
2034 if (source
== NS_FROM_DIR
&& router_digest_is_me(ns
->identity_digest
)) {
2035 /* Don't replace our own networkstatus when we get it from somebody else.*/
2036 networkstatus_free(ns
);
2040 if (requested_fingerprints
) {
2041 if (smartlist_string_isin(requested_fingerprints
, fp
)) {
2042 smartlist_string_remove(requested_fingerprints
, fp
);
2045 smartlist_join_strings(requested_fingerprints
," ",0,NULL
);
2047 "We received a network status with a fingerprint (%s) that we "
2048 "never requested. (We asked for: %s.) Dropping.", fp
, requested
);
2049 tor_free(requested
);
2055 if (!skewed
&& get_options()->DirPort
) {
2056 add_networkstatus_to_cache(s
, source
, ns
);
2057 networkstatus_free(ns
);
2062 if (source
!= NS_FROM_CACHE
&& trusted_dir
)
2063 trusted_dir
->n_networkstatus_failures
= 0;
2066 for (i
=0; i
< smartlist_len(networkstatus_list
); ++i
) {
2067 networkstatus_t
*old_ns
= smartlist_get(networkstatus_list
, i
);
2069 if (!memcmp(old_ns
->identity_digest
, ns
->identity_digest
, DIGEST_LEN
)) {
2070 if (!memcmp(old_ns
->networkstatus_digest
,
2071 ns
->networkstatus_digest
, DIGEST_LEN
)) {
2072 /* Same one we had before. */
2073 networkstatus_free(ns
);
2075 "Not replacing network-status from %s (published %s); "
2076 "we already have it.",
2077 trusted_dir
->description
, published
);
2078 if (old_ns
->received_on
< arrived_at
) {
2079 if (source
!= NS_FROM_CACHE
) {
2080 char *fn
= networkstatus_get_cache_filename(old_ns
);
2081 /* We use mtime to tell when it arrived, so update that. */
2085 old_ns
->received_on
= arrived_at
;
2088 } else if (old_ns
->published_on
>= ns
->published_on
) {
2089 char old_published
[ISO_TIME_LEN
+1];
2090 format_iso_time(old_published
, old_ns
->published_on
);
2092 "Not replacing network-status from %s (published %s);"
2093 " we have a newer one (published %s) for this authority.",
2094 trusted_dir
->description
, published
,
2096 networkstatus_free(ns
);
2099 networkstatus_free(old_ns
);
2100 smartlist_set(networkstatus_list
, i
, ns
);
2108 smartlist_add(networkstatus_list
, ns
);
2110 SMARTLIST_FOREACH(ns
->entries
, routerstatus_t
*, rs
,
2112 if (!router_get_by_descriptor_digest(rs
->descriptor_digest
))
2113 rs
->need_to_mirror
= 1;
2116 info(LD_DIR
, "Setting networkstatus %s %s (published %s)",
2117 source
== NS_FROM_CACHE
?"cached from":
2118 (source
==NS_FROM_DIR
?"downloaded from":"generated for"),
2119 trusted_dir
->description
, published
);
2120 networkstatus_list_has_changed
= 1;
2122 smartlist_sort(networkstatus_list
, _compare_networkstatus_published_on
);
2125 add_networkstatus_to_cache(s
, source
, ns
);
2127 networkstatus_list_update_recent(now
);
2132 /** How old do we allow a network-status to get before removing it
2134 #define MAX_NETWORKSTATUS_AGE (10*24*60*60)
2135 /** Remove all very-old network_status_t objects from memory and from the
2138 networkstatus_list_clean(time_t now
)
2141 if (!networkstatus_list
)
2144 for (i
= 0; i
< smartlist_len(networkstatus_list
); ++i
) {
2145 networkstatus_t
*ns
= smartlist_get(networkstatus_list
, i
);
2146 char *fname
= NULL
;;
2147 if (ns
->published_on
+ MAX_NETWORKSTATUS_AGE
> now
)
2149 /* Okay, this one is too old. Remove it from the list, and delete it
2150 * from the cache. */
2151 smartlist_del(networkstatus_list
, i
--);
2152 fname
= networkstatus_get_cache_filename(ns
);
2153 if (file_status(fname
) == FN_FILE
) {
2154 info(LD_DIR
, "Removing too-old networkstatus in %s", fname
);
2158 if (get_options()->DirPort
) {
2159 dirserv_set_cached_networkstatus_v2(NULL
, ns
->identity_digest
, 0);
2161 networkstatus_free(ns
);
2165 /** Helper for bsearching a list of routerstatus_t pointers.*/
2167 _compare_digest_to_routerstatus_entry(const void *_key
, const void **_member
)
2169 const char *key
= _key
;
2170 const routerstatus_t
*rs
= *_member
;
2171 return memcmp(key
, rs
->identity_digest
, DIGEST_LEN
);
2174 /** Return the entry in <b>ns</b> for the identity digest <b>digest</b>, or
2175 * NULL if none was found. */
2176 static routerstatus_t
*
2177 networkstatus_find_entry(networkstatus_t
*ns
, const char *digest
)
2179 return smartlist_bsearch(ns
->entries
, digest
,
2180 _compare_digest_to_routerstatus_entry
);
2183 /** Return the consensus view of the status of the router whose digest is
2184 * <b>digest</b>, or NULL if we don't know about any such router. */
2185 local_routerstatus_t
*
2186 router_get_combined_status_by_digest(const char *digest
)
2188 if (!routerstatus_list
)
2190 return smartlist_bsearch(routerstatus_list
, digest
,
2191 _compare_digest_to_routerstatus_entry
);
2194 /** Return true iff any networkstatus includes a descriptor whose digest
2195 * is that of <b>desc</b>. */
2197 signed_desc_digest_is_recognized(signed_descriptor_t
*desc
)
2200 if (!networkstatus_list
)
2203 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
2205 if (!(rs
= networkstatus_find_entry(ns
, desc
->identity_digest
)))
2207 if (!memcmp(rs
->descriptor_digest
,
2208 desc
->signed_descriptor_digest
, DIGEST_LEN
))
2214 /* XXXX These should be configurable, perhaps? NM */
2215 #define AUTHORITY_NS_CACHE_INTERVAL 5*60
2216 #define NONAUTHORITY_NS_CACHE_INTERVAL 15*60
2217 /** We are a directory server, and so cache network_status documents.
2218 * Initiate downloads as needed to update them. For authorities, this means
2219 * asking each trusted directory for its network-status. For caches, this
2220 * means asking a random authority for all network-statuses.
2223 update_networkstatus_cache_downloads(time_t now
)
2225 int authority
= authdir_mode(get_options());
2227 authority
? AUTHORITY_NS_CACHE_INTERVAL
: NONAUTHORITY_NS_CACHE_INTERVAL
;
2229 if (last_networkstatus_download_attempted
+ interval
>= now
)
2231 if (!trusted_dir_servers
)
2234 last_networkstatus_download_attempted
= now
;
2237 /* An authority launches a separate connection for everybody. */
2238 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ds
,
2240 char resource
[HEX_DIGEST_LEN
+6];
2241 if (router_digest_is_me(ds
->digest
))
2243 if (connection_get_by_type_addr_port_purpose(
2244 CONN_TYPE_DIR
, ds
->addr
, ds
->dir_port
,
2245 DIR_PURPOSE_FETCH_NETWORKSTATUS
)) {
2246 /* We are already fetching this one. */
2249 strlcpy(resource
, "fp/", sizeof(resource
));
2250 base16_encode(resource
+3, sizeof(resource
)-3, ds
->digest
, DIGEST_LEN
);
2251 strlcat(resource
, ".z", sizeof(resource
));
2252 directory_initiate_command_routerstatus(
2253 &ds
->fake_status
, DIR_PURPOSE_FETCH_NETWORKSTATUS
,
2254 0, /* Not private */
2256 NULL
, 0 /* No payload. */);
2259 /* A non-authority cache launches one connection to a random authority. */
2260 /* (Check whether we're currently fetching network-status objects.) */
2261 if (!connection_get_by_type_purpose(CONN_TYPE_DIR
,
2262 DIR_PURPOSE_FETCH_NETWORKSTATUS
))
2263 directory_get_from_dirserver(DIR_PURPOSE_FETCH_NETWORKSTATUS
,"all.z",1);
2267 /*XXXX Should these be configurable? NM*/
2268 /** How old (in seconds) can a network-status be before we try replacing it? */
2269 #define NETWORKSTATUS_MAX_VALIDITY (48*60*60)
2270 /** How long (in seconds) does a client wait after getting a network status
2271 * before downloading the next in sequence? */
2272 #define NETWORKSTATUS_CLIENT_DL_INTERVAL (30*60)
2273 /* How many times do we allow a networkstatus download to fail before we
2274 * assume that the authority isn't publishing? */
2275 #define NETWORKSTATUS_N_ALLOWABLE_FAILURES 3
2276 /** We are not a directory cache or authority. Update our network-status list
2277 * by launching a new directory fetch for enough network-status documents "as
2278 * necessary". See function comments for implementation details.
2281 update_networkstatus_client_downloads(time_t now
)
2283 int n_live
= 0, needed
= 0, n_running_dirservers
, n_dirservers
, i
;
2284 int most_recent_idx
= -1;
2285 trusted_dir_server_t
*most_recent
= NULL
;
2286 time_t most_recent_received
= 0;
2287 char *resource
, *cp
;
2288 size_t resource_len
;
2290 if (connection_get_by_type_purpose(CONN_TYPE_DIR
,
2291 DIR_PURPOSE_FETCH_NETWORKSTATUS
))
2294 /* This is a little tricky. We want to download enough network-status
2295 * objects so that we have at least half of them under
2296 * NETWORKSTATUS_MAX_VALIDITY publication time. We want to download a new
2297 * *one* if the most recent one's publication time is under
2298 * NETWORKSTATUS_CLIENT_DL_INTERVAL.
2300 if (!trusted_dir_servers
|| !smartlist_len(trusted_dir_servers
))
2302 n_dirservers
= n_running_dirservers
= smartlist_len(trusted_dir_servers
);
2303 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ds
,
2305 networkstatus_t
*ns
= networkstatus_get_by_digest(ds
->digest
);
2308 if (ds
->n_networkstatus_failures
> NETWORKSTATUS_N_ALLOWABLE_FAILURES
) {
2309 --n_running_dirservers
;
2312 if (ns
->published_on
> now
-NETWORKSTATUS_MAX_VALIDITY
)
2314 if (!most_recent
|| ns
->received_on
> most_recent_received
) {
2315 most_recent_idx
= ds_sl_idx
; /* magic variable from FOREACH */
2317 most_recent_received
= ns
->received_on
;
2321 /* Download enough so we have at least half live, but no more than all the
2322 * trusted dirservers we know.
2324 if (n_live
< (n_dirservers
/2)+1)
2325 needed
= (n_dirservers
/2)+1-n_live
;
2326 if (needed
> n_running_dirservers
)
2327 needed
= n_running_dirservers
;
2330 info(LD_DIR
, "For %d/%d running directory servers, we have %d live"
2331 " network-status documents. Downloading %d.",
2332 n_running_dirservers
, n_dirservers
, n_live
, needed
);
2334 /* Also, download at least 1 every NETWORKSTATUS_CLIENT_DL_INTERVAL. */
2335 if (n_running_dirservers
&&
2336 most_recent_received
< now
-NETWORKSTATUS_CLIENT_DL_INTERVAL
&&
2338 info(LD_DIR
, "Our most recent network-status document (from %s) "
2339 "is %d seconds old; downloading another.",
2340 most_recent
?most_recent
->description
:"nobody",
2341 (int)(now
-most_recent_received
));
2348 /* If no networkstatus was found, choose a dirserver at random as "most
2350 if (most_recent_idx
<0)
2351 most_recent_idx
= crypto_rand_int(n_dirservers
);
2353 /* Build a request string for all the resources we want. */
2354 resource_len
= needed
* (HEX_DIGEST_LEN
+1) + 6;
2355 resource
= tor_malloc(resource_len
);
2356 memcpy(resource
, "fp/", 3);
2358 for (i
= most_recent_idx
+1; needed
; ++i
) {
2359 trusted_dir_server_t
*ds
;
2360 if (i
>= n_dirservers
)
2362 ds
= smartlist_get(trusted_dir_servers
, i
);
2363 if (ds
->n_networkstatus_failures
> NETWORKSTATUS_N_ALLOWABLE_FAILURES
)
2365 base16_encode(cp
, HEX_DIGEST_LEN
+1, ds
->digest
, DIGEST_LEN
);
2366 cp
+= HEX_DIGEST_LEN
;
2371 memcpy(cp
, ".z", 3);
2372 directory_get_from_dirserver(DIR_PURPOSE_FETCH_NETWORKSTATUS
, resource
, 1);
2376 /** Launch requests for networkstatus documents as appropriate. */
2378 update_networkstatus_downloads(time_t now
)
2380 or_options_t
*options
= get_options();
2381 if (server_mode(options
) && options
->DirPort
)
2382 update_networkstatus_cache_downloads(time(NULL
));
2384 update_networkstatus_client_downloads(time(NULL
));
2387 /** Decide whether a given addr:port is definitely accepted,
2388 * definitely rejected, probably accepted, or probably rejected by a
2389 * given policy. If <b>addr</b> is 0, we don't know the IP of the
2390 * target address. If <b>port</b> is 0, we don't know the port of the
2393 * For now, the algorithm is pretty simple: we look for definite and
2394 * uncertain matches. The first definite match is what we guess; if
2395 * it was preceded by no uncertain matches of the opposite policy,
2396 * then the guess is definite; otherwise it is probable. (If we
2397 * have a known addr and port, all matches are definite; if we have an
2398 * unknown addr/port, any address/port ranges other than "all" are
2401 * We could do better by assuming that some ranges never match typical
2402 * addresses (127.0.0.1, and so on). But we'll try this for now.
2404 addr_policy_result_t
2405 router_compare_addr_to_addr_policy(uint32_t addr
, uint16_t port
,
2406 addr_policy_t
*policy
)
2408 int maybe_reject
= 0;
2409 int maybe_accept
= 0;
2412 addr_policy_t
*tmpe
;
2414 for (tmpe
=policy
; tmpe
; tmpe
=tmpe
->next
) {
2417 /* Address is unknown. */
2418 if ((port
>= tmpe
->prt_min
&& port
<= tmpe
->prt_max
) ||
2419 (!port
&& tmpe
->prt_min
<=1 && tmpe
->prt_max
>=65535)) {
2420 /* The port definitely matches. */
2421 if (tmpe
->msk
== 0) {
2427 /* The port maybe matches. */
2431 /* Address is known */
2432 if ((addr
& tmpe
->msk
) == (tmpe
->addr
& tmpe
->msk
)) {
2433 if (port
>= tmpe
->prt_min
&& port
<= tmpe
->prt_max
) {
2434 /* Exact match for the policy */
2442 if (tmpe
->policy_type
== ADDR_POLICY_REJECT
)
2448 if (tmpe
->policy_type
== ADDR_POLICY_ACCEPT
) {
2449 /* If we already hit a clause that might trigger a 'reject', than we
2450 * can't be sure of this certain 'accept'.*/
2451 return maybe_reject
? ADDR_POLICY_PROBABLY_ACCEPTED
:
2452 ADDR_POLICY_ACCEPTED
;
2454 return maybe_accept
? ADDR_POLICY_PROBABLY_REJECTED
:
2455 ADDR_POLICY_REJECTED
;
2459 /* accept all by default. */
2460 return maybe_reject
? ADDR_POLICY_PROBABLY_ACCEPTED
: ADDR_POLICY_ACCEPTED
;
2463 /** Return 1 if all running sufficiently-stable routers will reject
2464 * addr:port, return 0 if any might accept it. */
2466 router_exit_policy_all_routers_reject(uint32_t addr
, uint16_t port
,
2469 addr_policy_result_t r
;
2470 if (!routerlist
) return 1;
2472 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
2474 if (router
->is_running
&&
2475 !router_is_unreliable(router
, need_uptime
, 0)) {
2476 r
= router_compare_addr_to_addr_policy(addr
, port
, router
->exit_policy
);
2477 if (r
!= ADDR_POLICY_REJECTED
&& r
!= ADDR_POLICY_PROBABLY_REJECTED
)
2478 return 0; /* this one could be ok. good enough. */
2481 return 1; /* all will reject. */
2485 * If <b>policy</b> implicitly allows connections to any port in the
2486 * IP set <b>addr</b>/<b>mask</b>, then set *<b>policy_out</b> to the
2487 * part of the policy that allows it, and return 1. Else return 0.
2489 * A policy allows an IP:Port combination <em>implicitly</em> if
2490 * it is included in a *: pattern, or in a fallback pattern.
2493 policy_includes_addr_mask_implicitly(addr_policy_t
*policy
,
2494 uint32_t addr
, uint32_t mask
,
2495 addr_policy_t
**policy_out
)
2498 tor_assert(policy_out
);
2500 addr2
= addr
| ~mask
;
2501 for (; policy
; policy
=policy
->next
) {
2502 /* Does this policy cover all of the address range we're looking at? */
2503 /* Boolean logic time: range X is contained in range Y if, for
2504 * each bit B, all possible values of B in X are values of B in Y.
2505 * In "addr", we have every fixed bit set to its value, and every
2506 * free bit set to 0. In "addr2", we have every fixed bit set to
2507 * its value, and every free bit set to 1. So if addr and addr2 are
2508 * both in the policy, the range is covered by the policy.
2510 uint32_t p_addr
= policy
->addr
& policy
->msk
;
2511 if (p_addr
== (addr
& policy
->msk
) &&
2512 p_addr
== (addr2
& policy
->msk
) &&
2513 (policy
->prt_min
<= 1 && policy
->prt_max
== 65535)) {
2516 /* Does this policy cover some of the address range we're looking at? */
2517 /* Boolean logic time: range X and range Y intersect if there is
2518 * some z such that z & Xmask == Xaddr and z & Ymask == Yaddr.
2519 * This is FALSE iff there is some bit b where Xmask == yMask == 1
2520 * and Xaddr != Yaddr. So if X intersects with Y iff at every
2521 * place where Xmask&Ymask==1, Xaddr == Yaddr, or equivalently,
2522 * Xaddr&Xmask&Ymask == Yaddr&Xmask&Ymask.
2524 if ((policy
->addr
& policy
->msk
& mask
) == (addr
& policy
->msk
) &&
2525 policy
->policy_type
== ADDR_POLICY_ACCEPT
) {
2526 *policy_out
= policy
;
2534 /** If <b>policy</b> implicitly allows connections to any port on
2535 * 127.*, 192.168.*, etc, then warn (if <b>should_warn</b> is set) and return
2536 * true. Else return false.
2539 exit_policy_implicitly_allows_local_networks(addr_policy_t
*policy
,
2545 uint32_t addr
; uint32_t mask
; const char *network
;
2546 } private_networks
[] = {
2547 { 0x7f000000, 0xff000000, "localhost (127.0.0.0/8)" },
2548 { 0x0a000000, 0xff000000, "addresses in private network 10.0.0.0/8" },
2549 { 0xa9fe0000, 0xffff0000, "addresses in private network 169.254.0.0/16" },
2550 { 0xac100000, 0xfff00000, "addresses in private network 172.16.0.0/12" },
2551 { 0xc0a80000, 0xffff0000, "addresses in private network 192.168.0.0/16" },
2554 for (i
=0; private_networks
[i
].addr
; ++i
) {
2556 /* log_fn(LOG_INFO,"Checking network %s", private_networks[i].network); */
2557 if (policy_includes_addr_mask_implicitly(
2558 policy
, private_networks
[i
].addr
, private_networks
[i
].mask
, &p
)) {
2560 warn(LD_CONFIG
, "Exit policy %s implicitly accepts %s",
2561 p
?p
->string
:"(default)",
2562 private_networks
[i
].network
);
2570 /** Return true iff <b>router</b> does not permit exit streams.
2573 router_exit_policy_rejects_all(routerinfo_t
*router
)
2575 return router_compare_addr_to_addr_policy(0, 0, router
->exit_policy
)
2576 == ADDR_POLICY_REJECTED
;
2579 /** Add to the list of authorized directory servers one at
2580 * <b>address</b>:<b>port</b>, with identity key <b>digest</b>. If
2581 * <b>address</b> is NULL, add ourself. */
2583 add_trusted_dir_server(const char *nickname
, const char *address
,
2584 uint16_t port
, const char *digest
, int supports_v1
)
2586 trusted_dir_server_t
*ent
;
2588 char *hostname
= NULL
;
2590 if (!trusted_dir_servers
)
2591 trusted_dir_servers
= smartlist_create();
2593 if (!address
) { /* The address is us; we should guess. */
2594 if (resolve_my_address(get_options(), &a
, &hostname
) < 0) {
2596 "Couldn't find a suitable address when adding ourself as a "
2597 "trusted directory server.");
2601 if (tor_lookup_hostname(address
, &a
)) {
2602 warn(LD_CONFIG
, "Unable to lookup address for directory server at '%s'",
2606 hostname
= tor_strdup(address
);
2610 ent
= tor_malloc_zero(sizeof(trusted_dir_server_t
));
2611 ent
->nickname
= nickname
? tor_strdup(nickname
) : NULL
;
2612 ent
->address
= hostname
;
2614 ent
->dir_port
= port
;
2615 ent
->is_running
= 1;
2616 ent
->is_v1_authority
= supports_v1
;
2617 memcpy(ent
->digest
, digest
, DIGEST_LEN
);
2619 dlen
= 64 + strlen(hostname
) + (nickname
?strlen(nickname
):0);
2620 ent
->description
= tor_malloc(dlen
);
2622 tor_snprintf(ent
->description
, dlen
, "directory server \"%s\" at %s:%d",
2623 nickname
, hostname
, (int)port
);
2625 tor_snprintf(ent
->description
, dlen
, "directory server at %s:%d",
2626 hostname
, (int)port
);
2628 ent
->fake_status
.addr
= ent
->addr
;
2629 memcpy(ent
->fake_status
.identity_digest
, digest
, DIGEST_LEN
);
2631 strlcpy(ent
->fake_status
.nickname
, nickname
,
2632 sizeof(ent
->fake_status
.nickname
));
2634 ent
->fake_status
.nickname
[0] = '\0';
2635 ent
->fake_status
.dir_port
= ent
->dir_port
;
2637 smartlist_add(trusted_dir_servers
, ent
);
2640 /** Free storage held in <b>ds</b> */
2642 trusted_dir_server_free(trusted_dir_server_t
*ds
)
2644 tor_free(ds
->nickname
);
2645 tor_free(ds
->description
);
2646 tor_free(ds
->address
);
2650 /** Remove all members from the list of trusted dir servers. */
2652 clear_trusted_dir_servers(void)
2654 if (trusted_dir_servers
) {
2655 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ent
,
2656 trusted_dir_server_free(ent
));
2657 smartlist_clear(trusted_dir_servers
);
2659 trusted_dir_servers
= smartlist_create();
2663 /** Return the network status with a given identity digest. */
2665 networkstatus_get_by_digest(const char *digest
)
2667 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
2669 if (!memcmp(ns
->identity_digest
, digest
, DIGEST_LEN
))
2675 /** If the network-status list has changed since the last time we called this
2676 * function, update the status of every routerinfo from the network-status
2680 routers_update_all_from_networkstatus(void)
2682 #define SELF_OPINION_INTERVAL 90*60
2685 if (!routerlist
|| !networkstatus_list
||
2686 (!networkstatus_list_has_changed
&& !routerstatus_list_has_changed
))
2690 if (networkstatus_list_has_changed
)
2691 routerstatus_list_update_from_networkstatus(now
);
2693 routers_update_status_from_networkstatus(routerlist
->routers
, 0);
2695 me
= router_get_my_routerinfo();
2696 if (me
&& !have_warned_about_unverified_status
) {
2697 int n_recent
= 0, n_listing
= 0, n_valid
= 0, n_named
= 0;
2699 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
2701 if (ns
->received_on
+ SELF_OPINION_INTERVAL
< now
)
2704 if (!(rs
= networkstatus_find_entry(ns
, me
->cache_info
.identity_digest
)))
2713 if (n_recent
>= 2 && n_listing
>= 2) {
2714 /* XXX When we have more than 3 dirservers, these warnings
2715 * might become spurious depending on which combination of
2716 * network-statuses we have. Perhaps we should wait until we
2717 * have tried all of them? -RD */
2718 if (n_valid
<= n_recent
/2) {
2720 "%d/%d recent directory servers list us as invalid. Please "
2721 "consider sending your identity fingerprint to the tor-ops.",
2722 n_recent
-n_valid
, n_recent
);
2723 have_warned_about_unverified_status
= 1;
2724 } else if (!n_named
) { // (n_named <= n_recent/2) {
2725 warn(LD_GENERAL
, "0/%d recent directory servers recognize this "
2726 "server. Please consider sending your identity fingerprint to "
2729 have_warned_about_unverified_status
= 1;
2734 entry_guards_set_status_from_directory();
2736 if (!have_warned_about_old_version
) {
2738 int n_recommended
= 0;
2739 int is_server
= server_mode(get_options());
2740 version_status_t consensus
= VS_RECOMMENDED
;
2741 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
2743 version_status_t vs
;
2744 if (!ns
->recommends_versions
||
2745 ns
->received_on
+ SELF_OPINION_INTERVAL
< now
)
2747 vs
= tor_version_is_obsolete(
2748 VERSION
, is_server
? ns
->server_versions
: ns
->client_versions
);
2749 if (vs
== VS_RECOMMENDED
)
2751 if (n_recent
++ == 0) {
2753 } else if (consensus
!= vs
) {
2754 consensus
= version_status_join(consensus
, vs
);
2757 if (n_recent
> 2 && n_recommended
< n_recent
/2) {
2758 if (consensus
== VS_NEW
|| consensus
== VS_NEW_IN_SERIES
) {
2759 if (!have_warned_about_new_version
) {
2760 notice(LD_GENERAL
, "This version of Tor (%s) is newer than any "
2761 "recommended version%s, according to %d/%d recent network "
2764 consensus
== VS_NEW_IN_SERIES
? " in its series" : "",
2765 n_recent
-n_recommended
, n_recent
);
2766 have_warned_about_new_version
= 1;
2769 notice(LD_GENERAL
, "This version of Tor (%s) is %s, according to "
2770 "%d/%d recent network statuses.",
2771 VERSION
, consensus
== VS_OLD
? "obsolete" : "not recommended",
2772 n_recent
-n_recommended
, n_recent
);
2773 have_warned_about_old_version
= 1;
2776 info(LD_GENERAL
, "%d/%d recent directories think my version is ok.",
2777 n_recommended
, n_recent
);
2781 routerstatus_list_has_changed
= 0;
2784 /** Allow any network-status newer than this to influence our view of who's
2786 #define DEFAULT_RUNNING_INTERVAL 60*60
2787 /** If possible, always allow at least this many network-statuses to influence
2788 * our view of who's running. */
2789 #define MIN_TO_INFLUENCE_RUNNING 3
2791 /** Change the is_recent field of each member of networkstatus_list so that
2792 * all members more recent than DEFAULT_RUNNING_INTERVAL are recent, and
2793 * at least the MIN_TO_INFLUENCE_RUNNING most recent members are resent, and no
2794 * others are recent. Set networkstatus_list_has_changed if anything happeed.
2797 networkstatus_list_update_recent(time_t now
)
2799 int n_statuses
, n_recent
, changed
, i
;
2800 char published
[ISO_TIME_LEN
+1];
2802 if (!networkstatus_list
)
2805 n_statuses
= smartlist_len(networkstatus_list
);
2808 for (i
=n_statuses
-1; i
>= 0; --i
) {
2809 networkstatus_t
*ns
= smartlist_get(networkstatus_list
, i
);
2810 trusted_dir_server_t
*ds
=
2811 router_get_trusteddirserver_by_digest(ns
->identity_digest
);
2812 const char *src
= ds
?ds
->description
:ns
->source_address
;
2813 if (n_recent
< MIN_TO_INFLUENCE_RUNNING
||
2814 ns
->published_on
+ DEFAULT_RUNNING_INTERVAL
> now
) {
2815 if (!ns
->is_recent
) {
2816 format_iso_time(published
, ns
->published_on
);
2818 "Networkstatus from %s (published %s) is now \"recent\"",
2825 if (ns
->is_recent
) {
2826 format_iso_time(published
, ns
->published_on
);
2828 "Networkstatus from %s (published %s) is no longer \"recent\"",
2836 networkstatus_list_has_changed
= 1;
2839 /** Helper for routerstatus_list_update_from_networkstatus: remember how many
2840 * authorities recommend a given descriptor digest. */
2844 } desc_digest_count_t
;
2846 /** Update our view of router status (as stored in routerstatus_list) from the
2847 * current set of network status documents (as stored in networkstatus_list).
2848 * Do nothing unless the network status list has changed since the last time
2849 * this function was called.
2852 routerstatus_list_update_from_networkstatus(time_t now
)
2854 or_options_t
*options
= get_options();
2855 int n_trusted
, n_statuses
, n_recent
= 0, n_naming
= 0;
2858 networkstatus_t
**networkstatus
;
2859 smartlist_t
*result
;
2861 char conflict
[DIGEST_LEN
]; /* Sentinel value */
2862 desc_digest_count_t
*digest_counts
= NULL
;
2864 networkstatus_list_update_recent(now
);
2866 if (!networkstatus_list_has_changed
)
2868 if (!networkstatus_list
)
2869 networkstatus_list
= smartlist_create();
2870 if (!routerstatus_list
)
2871 routerstatus_list
= smartlist_create();
2872 if (!trusted_dir_servers
)
2873 trusted_dir_servers
= smartlist_create();
2874 if (!warned_conflicts
)
2875 warned_conflicts
= smartlist_create();
2877 n_trusted
= smartlist_len(trusted_dir_servers
);
2878 n_statuses
= smartlist_len(networkstatus_list
);
2880 if (n_statuses
< (n_trusted
/2)+1) {
2881 /* Not enough statuses to adjust status. */
2882 notice(LD_DIR
,"Not enough statuses to update router status list. (%d/%d)",
2883 n_statuses
, n_trusted
);
2887 info(LD_DIR
, "Rebuilding router status list.");
2889 index
= tor_malloc(sizeof(int)*n_statuses
);
2890 size
= tor_malloc(sizeof(int)*n_statuses
);
2891 networkstatus
= tor_malloc(sizeof(networkstatus_t
*)*n_statuses
);
2892 for (i
= 0; i
< n_statuses
; ++i
) {
2894 networkstatus
[i
] = smartlist_get(networkstatus_list
, i
);
2895 size
[i
] = smartlist_len(networkstatus
[i
]->entries
);
2896 if (networkstatus
[i
]->binds_names
)
2898 if (networkstatus
[i
]->is_recent
)
2902 /** Iterate over all entries in all networkstatuses, and build
2903 * name_map as a map from lc nickname to identity digest. If there
2904 * is a conflict on that nickname, map the lc nickname to conflict.
2906 name_map
= strmap_new();
2907 memset(conflict
, 0xff, sizeof(conflict
));
2908 for (i
= 0; i
< n_statuses
; ++i
) {
2909 if (!networkstatus
[i
]->binds_names
)
2911 SMARTLIST_FOREACH(networkstatus
[i
]->entries
, routerstatus_t
*, rs
,
2913 const char *other_digest
;
2916 other_digest
= strmap_get_lc(name_map
, rs
->nickname
);
2917 warned
= smartlist_string_isin(warned_conflicts
, rs
->nickname
);
2918 if (!other_digest
) {
2919 strmap_set_lc(name_map
, rs
->nickname
, rs
->identity_digest
);
2921 smartlist_string_remove(warned_conflicts
, rs
->nickname
);
2922 } else if (memcmp(other_digest
, rs
->identity_digest
, DIGEST_LEN
) &&
2923 other_digest
!= conflict
) {
2925 int should_warn
= options
->DirPort
&& options
->AuthoritativeDir
;
2926 char fp1
[HEX_DIGEST_LEN
+1];
2927 char fp2
[HEX_DIGEST_LEN
+1];
2928 base16_encode(fp1
, sizeof(fp1
), other_digest
, DIGEST_LEN
);
2929 base16_encode(fp2
, sizeof(fp2
), rs
->identity_digest
, DIGEST_LEN
);
2930 log_fn(should_warn
? LOG_WARN
: LOG_INFO
, LD_DIR
,
2931 "Naming authorities disagree about which key goes with %s. "
2933 rs
->nickname
, fp1
, fp2
);
2934 strmap_set_lc(name_map
, rs
->nickname
, conflict
);
2935 smartlist_add(warned_conflicts
, tor_strdup(rs
->nickname
));
2939 smartlist_string_remove(warned_conflicts
, rs
->nickname
);
2944 result
= smartlist_create();
2945 digest_counts
= tor_malloc_zero(sizeof(desc_digest_count_t
)*n_statuses
);
2947 /* Iterate through all of the sorted routerstatus lists in lockstep.
2949 * - For 0 <= i < n_statuses: index[i] is an index into
2950 * networkstatus[i]->entries, which has size[i] elements.
2951 * - For i1, i2, j such that 0 <= i1 < n_statuses, 0 <= i2 < n_statues, 0 <=
2952 * j < index[i1], networkstatus[i1]->entries[j]->identity_digest <
2953 * networkstatus[i2]->entries[index[i2]]->identity_digest.
2955 * (That is, the indices are always advanced past lower digest before
2959 int n_running
=0, n_named
=0, n_valid
=0, n_listing
=0;
2960 int n_v2_dir
=0, n_fast
=0, n_stable
=0, n_exit
=0;
2961 int n_desc_digests
=0, highest_count
=0;
2962 const char *the_name
= NULL
;
2963 local_routerstatus_t
*rs_out
, *rs_old
;
2964 routerstatus_t
*rs
, *most_recent
;
2965 networkstatus_t
*ns
;
2966 const char *lowest
= NULL
;
2968 /* Find out which of the digests appears first. */
2969 for (i
= 0; i
< n_statuses
; ++i
) {
2970 if (index
[i
] < size
[i
]) {
2971 rs
= smartlist_get(networkstatus
[i
]->entries
, index
[i
]);
2972 if (!lowest
|| memcmp(rs
->identity_digest
, lowest
, DIGEST_LEN
)<0)
2973 lowest
= rs
->identity_digest
;
2977 /* We're out of routers. Great! */
2980 /* Okay. The routers at networkstatus[i]->entries[index[i]] whose digests
2981 * match "lowest" are next in order. Iterate over them, incrementing those
2982 * index[i] as we go. */
2983 for (i
= 0; i
< n_statuses
; ++i
) {
2984 if (index
[i
] >= size
[i
])
2986 ns
= networkstatus
[i
];
2987 rs
= smartlist_get(ns
->entries
, index
[i
]);
2988 if (memcmp(rs
->identity_digest
, lowest
, DIGEST_LEN
))
2990 /* At this point, we know that we're looking at a routersatus with
2991 * identity "lowest".
2995 /* Should we name this router? Only if all the names from naming
2996 * authorities match. */
2997 if (rs
->is_named
&& ns
->binds_names
) {
2999 the_name
= rs
->nickname
;
3000 if (!strcasecmp(rs
->nickname
, the_name
)) {
3002 } else if (strcmp(the_name
,"**mismatch**")) {
3003 char hd
[HEX_DIGEST_LEN
+1];
3004 base16_encode(hd
, HEX_DIGEST_LEN
+1, rs
->identity_digest
, DIGEST_LEN
);
3005 if (! smartlist_string_isin(warned_conflicts
, hd
)) {
3006 warn(LD_DIR
, "Naming authorities disagree about nicknames for $%s "
3007 "(\"%s\" vs \"%s\")",
3008 hd
, the_name
, rs
->nickname
);
3009 smartlist_add(warned_conflicts
, tor_strdup(hd
));
3011 the_name
= "**mismatch**";
3014 /* Keep a running count of how often which descriptor digests
3016 for (j
= 0; j
< n_desc_digests
; ++j
) {
3017 if (!memcmp(rs
->descriptor_digest
,
3018 digest_counts
[j
].rs
->descriptor_digest
, DIGEST_LEN
)) {
3019 if (++digest_counts
[j
].count
> highest_count
)
3020 highest_count
= digest_counts
[j
].count
;
3024 digest_counts
[n_desc_digests
].rs
= rs
;
3025 digest_counts
[n_desc_digests
].count
= 1;
3030 /* Now tally up the easily-tallied flags. */
3033 if (rs
->is_running
&& ns
->is_recent
)
3044 /* Go over the descriptor digests and figure out which descriptor we
3047 for (i
= 0; i
< n_desc_digests
; ++i
) {
3048 /* If any digest appears twice or more, ignore those that don't.*/
3049 if (highest_count
>= 2 && digest_counts
[i
].count
< 2)
3052 digest_counts
[i
].rs
->published_on
> most_recent
->published_on
)
3053 most_recent
= digest_counts
[i
].rs
;
3055 rs_out
= tor_malloc_zero(sizeof(local_routerstatus_t
));
3056 memcpy(&rs_out
->status
, most_recent
, sizeof(routerstatus_t
));
3057 /* Copy status info about this router, if we had any before. */
3058 if ((rs_old
= router_get_combined_status_by_digest(lowest
))) {
3059 if (!memcmp(rs_out
->status
.descriptor_digest
,
3060 most_recent
->descriptor_digest
, DIGEST_LEN
)) {
3061 rs_out
->n_download_failures
= rs_old
->n_download_failures
;
3062 rs_out
->next_attempt_at
= rs_old
->next_attempt_at
;
3064 rs_out
->name_lookup_warned
= rs_old
->name_lookup_warned
;
3066 smartlist_add(result
, rs_out
);
3067 debug(LD_DIR
, "Router '%s' is listed by %d/%d directories, "
3068 "named by %d/%d, validated by %d/%d, and %d/%d recent directories "
3069 "think it's running.",
3070 rs_out
->status
.nickname
,
3071 n_listing
, n_statuses
, n_named
, n_naming
, n_valid
, n_statuses
,
3072 n_running
, n_recent
);
3073 rs_out
->status
.is_named
= 0;
3074 if (the_name
&& strcmp(the_name
, "**mismatch**") && n_named
> 0) {
3075 const char *d
= strmap_get_lc(name_map
, the_name
);
3076 if (d
&& d
!= conflict
)
3077 rs_out
->status
.is_named
= 1;
3078 if (smartlist_string_isin(warned_conflicts
, rs_out
->status
.nickname
))
3079 smartlist_string_remove(warned_conflicts
, rs_out
->status
.nickname
);
3081 if (rs_out
->status
.is_named
)
3082 strlcpy(rs_out
->status
.nickname
, the_name
,
3083 sizeof(rs_out
->status
.nickname
));
3084 rs_out
->status
.is_valid
= n_valid
> n_statuses
/2;
3085 rs_out
->status
.is_running
= n_running
> n_recent
/2;
3086 rs_out
->status
.is_exit
= n_exit
> n_statuses
/2;
3087 rs_out
->status
.is_fast
= n_fast
> n_statuses
/2;
3088 rs_out
->status
.is_stable
= n_stable
> n_statuses
/2;
3089 rs_out
->status
.is_v2_dir
= n_v2_dir
> n_statuses
/2;
3091 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
3092 local_routerstatus_free(rs
));
3093 smartlist_free(routerstatus_list
);
3094 routerstatus_list
= result
;
3096 tor_free(networkstatus
);
3099 tor_free(digest_counts
);
3100 strmap_free(name_map
, NULL
);
3102 networkstatus_list_has_changed
= 0;
3103 routerstatus_list_has_changed
= 1;
3106 /** Given a list <b>routers</b> of routerinfo_t *, update each routers's
3107 * is_named, is_verified, and is_running fields according to our current
3108 * networkstatus_t documents. */
3110 routers_update_status_from_networkstatus(smartlist_t
*routers
,
3113 trusted_dir_server_t
*ds
;
3114 local_routerstatus_t
*rs
;
3115 routerstatus_t
*rs2
;
3116 or_options_t
*options
= get_options();
3117 int authdir
= options
->AuthoritativeDir
;
3118 int namingdir
= options
->AuthoritativeDir
&&
3119 options
->NamingAuthoritativeDir
;
3121 if (!routerstatus_list
)
3124 SMARTLIST_FOREACH(routers
, routerinfo_t
*, router
,
3126 const char *digest
= router
->cache_info
.identity_digest
;
3127 rs
= router_get_combined_status_by_digest(digest
);
3128 ds
= router_get_trusteddirserver_by_digest(digest
);
3134 router
->is_named
= rs
->status
.is_named
;
3137 /* If we're an authdir, don't believe others. */
3138 router
->is_verified
= rs
->status
.is_valid
;
3139 router
->is_running
= rs
->status
.is_running
;
3140 router
->is_fast
= rs
->status
.is_fast
;
3141 router
->is_stable
= rs
->status
.is_stable
;
3143 if (router
->is_running
&& ds
) {
3144 ds
->n_networkstatus_failures
= 0;
3146 if (reset_failures
) {
3147 rs
->n_download_failures
= 0;
3148 rs
->next_attempt_at
= 0;
3151 /* Note that we have this descriptor. This may be redundant? */
3152 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
3154 rs2
= networkstatus_find_entry(ns
, router
->cache_info
.identity_digest
);
3155 if (rs2
&& !memcmp(rs2
->descriptor_digest
,
3156 router
->cache_info
.signed_descriptor_digest
,
3158 rs2
->need_to_mirror
= 0;
3163 /** For every router descriptor we are currently downloading by descriptor
3164 * digest, set result[d] to 1. */
3166 list_pending_descriptor_downloads(digestmap_t
*result
)
3168 const char *prefix
= "d/";
3169 size_t p_len
= strlen(prefix
);
3171 connection_t
**carray
;
3172 smartlist_t
*tmp
= smartlist_create();
3175 get_connection_array(&carray
, &n_conns
);
3177 for (i
= 0; i
< n_conns
; ++i
) {
3178 connection_t
*conn
= carray
[i
];
3179 if (conn
->type
== CONN_TYPE_DIR
&&
3180 conn
->purpose
== DIR_PURPOSE_FETCH_SERVERDESC
&&
3181 !conn
->marked_for_close
) {
3182 if (!strcmpstart(conn
->requested_resource
, prefix
))
3183 dir_split_resource_into_fingerprints(conn
->requested_resource
+p_len
,
3187 SMARTLIST_FOREACH(tmp
, char *, d
,
3189 digestmap_set(result
, d
, (void*)1);
3192 smartlist_free(tmp
);
3195 /** Launch downloads for the all the descriptors whose digests are listed
3196 * as digests[i] for lo <= i < hi. (Lo and hi may be out of range.)
3197 * If <b>source</b> is given, download from <b>source</b>; otherwise,
3198 * download from an appropriate random directory server.
3201 initiate_descriptor_downloads(routerstatus_t
*source
,
3202 smartlist_t
*digests
,
3206 char *resource
, *cp
;
3212 if (hi
> smartlist_len(digests
))
3213 hi
= smartlist_len(digests
);
3215 r_len
= 8 + (HEX_DIGEST_LEN
+1)*n
;
3216 cp
= resource
= tor_malloc(r_len
);
3217 memcpy(cp
, "d/", 2);
3219 for (i
= lo
; i
< hi
; ++i
) {
3220 base16_encode(cp
, r_len
-(cp
-resource
),
3221 smartlist_get(digests
,i
), DIGEST_LEN
);
3222 cp
+= HEX_DIGEST_LEN
;
3225 memcpy(cp
-1, ".z", 3);
3228 /* We know which authority we want. */
3229 directory_initiate_command_routerstatus(source
,
3230 DIR_PURPOSE_FETCH_SERVERDESC
,
3231 0, /* not private */
3234 directory_get_from_dirserver(DIR_PURPOSE_FETCH_SERVERDESC
,
3241 /** Return new list of ID fingerprints for routers that we (as a client) would
3244 static smartlist_t
*
3245 router_list_client_downloadable(void)
3247 #define MAX_OLD_SERVER_DOWNLOAD_RATE 2*60*60
3248 #define ESTIMATED_PROPAGATION_TIME 10*60
3249 int n_downloadable
= 0;
3250 smartlist_t
*downloadable
= smartlist_create();
3251 digestmap_t
*downloading
;
3252 time_t now
= time(NULL
);
3253 /* these are just used for logging */
3254 int n_not_ready
= 0, n_in_progress
= 0, n_uptodate
= 0,
3255 n_obsolete
= 0, n_too_young
= 0, n_wouldnt_use
= 0;
3257 if (!routerstatus_list
)
3258 return downloadable
;
3260 downloading
= digestmap_new();
3261 list_pending_descriptor_downloads(downloading
);
3263 routerstatus_list_update_from_networkstatus(now
);
3264 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
3267 if (rs
->status
.published_on
+ ROUTER_MAX_AGE
< now
) {
3268 /* This one is too old to consider. */
3270 } else if (digestmap_get(downloading
, rs
->status
.descriptor_digest
)) {
3271 /* We're downloading this one now. */
3273 } else if (!rs
->status
.is_running
) {
3274 /* If we had this router descriptor, we wouldn't even bother using it. */
3276 } else if (router_get_by_descriptor_digest(rs
->status
.descriptor_digest
)) {
3277 /* We have the 'best' descriptor for this router. */
3279 } else if ((ri
= router_get_by_digest(rs
->status
.identity_digest
)) &&
3280 ri
->cache_info
.published_on
> rs
->status
.published_on
) {
3281 /* Oddly, we have a descriptor more recent than the 'best' one, but it
3282 was once best. So that's okay. */
3284 } else if (rs
->status
.published_on
+ ESTIMATED_PROPAGATION_TIME
> now
) {
3285 /* Most caches probably don't have this descriptor yet. */
3287 } else if (rs
->next_attempt_at
> now
) {
3288 /* We failed too recently to try again. */
3291 /* Okay, time to try it. */
3292 smartlist_add(downloadable
, rs
->status
.descriptor_digest
);
3299 "%d router descriptors are downloadable. %d are too old to consider. "
3300 "%d are in progress. %d are up-to-date. %d are too young to consider. "
3301 "%d are non-useful. %d failed too recently to retry.",
3302 n_downloadable
, n_obsolete
, n_in_progress
, n_uptodate
, n_too_young
,
3303 n_wouldnt_use
, n_not_ready
);
3306 digestmap_free(downloading
, NULL
);
3307 return downloadable
;
3310 /** Initiate new router downloads as needed.
3312 * We only allow one router descriptor download at a time.
3313 * If we have less than two network-status documents, we ask
3314 * a directory for "all descriptors."
3315 * Otherwise, we ask for all descriptors that we think are different
3316 * from what we have.
3319 update_router_descriptor_client_downloads(time_t now
)
3321 #define MAX_DL_PER_REQUEST 128
3322 #define MIN_DL_PER_REQUEST 4
3323 #define MIN_REQUESTS 3
3324 #define MAX_DL_TO_DELAY 16
3325 #define MAX_CLIENT_INTERVAL_WITHOUT_REQUEST 10*60
3326 #define MAX_SERVER_INTERVAL_WITHOUT_REQUEST 1*60
3327 smartlist_t
*downloadable
= NULL
;
3328 int should_delay
, n_downloadable
;
3329 or_options_t
*options
= get_options();
3331 if (server_mode(options
) && options
->DirPort
) {
3332 warn(LD_BUG
, "Called router_descriptor_client_downloads() on a mirror?");
3335 if (networkstatus_list
&& smartlist_len(networkstatus_list
) < 2) {
3336 /* XXXX Is this redundant? -NM */
3337 info(LD_DIR
, "Not enough networkstatus documents to launch requests.");
3340 downloadable
= router_list_client_downloadable();
3341 n_downloadable
= smartlist_len(downloadable
);
3342 if (n_downloadable
>= MAX_DL_TO_DELAY
) {
3344 "There are enough downloadable routerdescs to launch requests.");
3346 } else if (n_downloadable
== 0) {
3347 // debug(LD_DIR, "No routerdescs need to be downloaded.");
3350 should_delay
= (last_routerdesc_download_attempted
+
3351 MAX_CLIENT_INTERVAL_WITHOUT_REQUEST
) > now
;
3354 // debug(LD_DIR, "There are not many downloadable routerdescs; "
3355 // "waiting till we have some more.");
3357 info(LD_DIR
, "There are not many downloadable routerdescs, but we've "
3358 "been waiting long enough (%d seconds). Downloading.",
3359 (int)(now
-last_routerdesc_download_attempted
));
3362 if (! should_delay
) {
3363 int i
, n_per_request
;
3364 n_per_request
= (n_downloadable
+MIN_REQUESTS
-1) / MIN_REQUESTS
;
3365 if (n_per_request
> MAX_DL_PER_REQUEST
)
3366 n_per_request
= MAX_DL_PER_REQUEST
;
3367 if (n_per_request
< MIN_DL_PER_REQUEST
)
3368 n_per_request
= MIN_DL_PER_REQUEST
;
3370 info(LD_DIR
, "Launching %d request%s for %d router%s, %d at a time",
3371 (n_downloadable
+n_per_request
-1)/n_per_request
,
3372 n_downloadable
>n_per_request
?"s":"",
3373 n_downloadable
, n_downloadable
>1?"s":"", n_per_request
);
3374 for (i
=0; i
< n_downloadable
; i
+= n_per_request
) {
3375 initiate_descriptor_downloads(NULL
, downloadable
, i
, i
+n_per_request
);
3377 last_routerdesc_download_attempted
= now
;
3379 smartlist_free(downloadable
);
3384 update_router_descriptor_cache_downloads(time_t now
)
3386 smartlist_t
**downloadable
; /* For each authority, what can we dl from it? */
3387 smartlist_t
**download_from
; /* ... and, what will we dl from it? */
3388 digestmap_t
*map
; /* Which descs are in progress, or assigned? */
3391 or_options_t
*options
= get_options();
3393 if (!(server_mode(options
) && options
->DirPort
)) {
3394 warn(LD_BUG
, "Called update_router_descriptor_cache_downloads() "
3395 "on a non-mirror?");
3398 if (!networkstatus_list
|| !smartlist_len(networkstatus_list
))
3401 map
= digestmap_new();
3402 n
= smartlist_len(networkstatus_list
);
3404 downloadable
= tor_malloc_zero(sizeof(smartlist_t
*) * n
);
3405 download_from
= tor_malloc_zero(sizeof(smartlist_t
*) * n
);
3407 /* Set map[d]=1 for the digest of every descriptor that we are currently
3409 list_pending_descriptor_downloads(map
);
3411 /* For the digest of every descriptor that we don't have, and that we aren't
3412 * downloading, add d to downloadable[i] if the i'th networkstatus knows
3413 * about that descriptor, and we haven't already failed to get that
3414 * descriptor from the corresponding authority.
3417 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
3419 smartlist_t
*dl
= smartlist_create();
3420 downloadable
[ns_sl_idx
] = dl
;
3421 download_from
[ns_sl_idx
] = smartlist_create();
3422 SMARTLIST_FOREACH(ns
->entries
, routerstatus_t
* , rs
,
3424 if (!rs
->need_to_mirror
)
3426 if (router_get_by_descriptor_digest(rs
->descriptor_digest
)) {
3427 warn(LD_BUG
, "We have a router descriptor, but need_to_mirror=1.");
3428 rs
->need_to_mirror
= 0;
3431 if (options
->AuthoritativeDir
&& dirserv_would_reject_router(rs
)) {
3432 rs
->need_to_mirror
= 0;
3435 if (digestmap_get(map
, rs
->descriptor_digest
)) {
3436 /* We're downloading it already. */
3439 /* We could download it from this guy. */
3440 smartlist_add(dl
, rs
->descriptor_digest
);
3446 /* At random, assign descriptors to authorities such that:
3447 * - if d is a member of some downloadable[x], d is a member of some
3448 * download_from[y]. (Everything we want to download, we try to download
3450 * - If d is a mamber of download_from[y], d is a member of downloadable[y].
3451 * (We only try to download descriptors from authorities who claim to have
3453 * - No d is a member of download_from[x] and download_from[y] s.t. x != y.
3454 * (We don't try to download anything from two authorities concurrently.)
3456 while (n_download
) {
3457 int which_ns
= crypto_rand_int(n
);
3458 smartlist_t
*dl
= downloadable
[which_ns
];
3462 if (!smartlist_len(dl
))
3464 idx
= crypto_rand_int(smartlist_len(dl
));
3465 d
= smartlist_get(dl
, idx
);
3466 if (! digestmap_get(map
, d
)) {
3467 smartlist_add(download_from
[which_ns
], d
);
3468 digestmap_set(map
, d
, (void*) 1);
3470 smartlist_del(dl
, idx
);
3474 /* Now, we can actually launch our requests. */
3475 for (i
=0; i
<n
; ++i
) {
3476 networkstatus_t
*ns
= smartlist_get(networkstatus_list
, i
);
3477 trusted_dir_server_t
*ds
=
3478 router_get_trusteddirserver_by_digest(ns
->identity_digest
);
3479 smartlist_t
*dl
= download_from
[i
];
3481 warn(LD_BUG
, "Networkstatus with no corresponding authority!");
3484 if (! smartlist_len(dl
))
3486 info(LD_DIR
, "Requesting %d descriptors from authority \"%s\"",
3487 smartlist_len(dl
), ds
->nickname
);
3488 for (j
=0; j
< smartlist_len(dl
); j
+= MAX_DL_PER_REQUEST
) {
3489 initiate_descriptor_downloads(&(ds
->fake_status
), dl
, j
,
3490 j
+MAX_DL_PER_REQUEST
);
3494 for (i
=0; i
<n
; ++i
) {
3495 smartlist_free(download_from
[i
]);
3496 smartlist_free(downloadable
[i
]);
3498 tor_free(download_from
);
3499 tor_free(downloadable
);
3500 digestmap_free(map
,NULL
);
3505 update_router_descriptor_downloads(time_t now
)
3507 or_options_t
*options
= get_options();
3508 if (server_mode(options
) && options
->DirPort
) {
3509 update_router_descriptor_cache_downloads(now
);
3511 update_router_descriptor_client_downloads(now
);
3515 /** Return true iff we have enough networkstatus and router information to
3516 * start building circuits. Right now, this means "at least 2 networkstatus
3517 * documents, and at least 1/4 of expected routers." */
3518 //XXX should consider whether we have enough exiting nodes here.
3520 router_have_minimum_dir_info(void)
3522 int tot
= 0, num_running
= 0;
3524 static int have_enough
= 0;
3525 if (!networkstatus_list
|| !routerlist
) {
3529 n_ns
= smartlist_len(networkstatus_list
);
3534 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
3535 tot
+= smartlist_len(ns
->entries
));
3537 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
3539 if (rs
->status
.is_running
)
3542 res
= smartlist_len(routerlist
->routers
) >= (avg
/4) && num_running
> 2;
3544 if (res
&& !have_enough
) {
3545 log(LOG_NOTICE
, LD_DIR
,
3546 "We now have enough directory information to build circuits.");
3548 if (!res
&& have_enough
) {
3549 log(LOG_NOTICE
, LD_DIR
,"Our directory information is no longer up-to-date "
3550 "enough to build circuits.%s",
3551 num_running
> 2 ? "" : " (Not enough servers seem reachable -- "
3552 "is your network connection down?)");
3558 /** Reset the descriptor download failure count on all routers, so that we
3559 * can retry any long-failed routers immediately.
3562 router_reset_descriptor_download_failures(void)
3564 if (!routerstatus_list
)
3566 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
3568 rs
->n_download_failures
= 0;
3569 rs
->next_attempt_at
= 0;
3571 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
3572 SMARTLIST_FOREACH(ns
->entries
, routerstatus_t
*, rs
,
3574 if (!router_get_by_descriptor_digest(rs
->descriptor_digest
))
3575 rs
->need_to_mirror
= 1;
3577 last_routerdesc_download_attempted
= 0;
3580 /** Return true iff the only differences between r1 and r2 are such that
3581 * would not cause a recent (post 0.1.1.6) dirserver to republish.
3584 router_differences_are_cosmetic(routerinfo_t
*r1
, routerinfo_t
*r2
)
3586 time_t r1pub
, r2pub
;
3587 tor_assert(r1
&& r2
);
3589 /* r1 should be the one that was published first. */
3590 if (r1
->cache_info
.published_on
> r2
->cache_info
.published_on
) {
3591 routerinfo_t
*ri_tmp
= r2
;
3596 /* If any key fields differ, they're different. */
3597 if (strcasecmp(r1
->address
, r2
->address
) ||
3598 strcasecmp(r1
->nickname
, r2
->nickname
) ||
3599 r1
->or_port
!= r2
->or_port
||
3600 r1
->dir_port
!= r2
->dir_port
||
3601 crypto_pk_cmp_keys(r1
->onion_pkey
, r2
->onion_pkey
) ||
3602 crypto_pk_cmp_keys(r1
->identity_pkey
, r2
->identity_pkey
) ||
3603 strcasecmp(r1
->platform
, r2
->platform
) ||
3604 (r1
->contact_info
&& !r2
->contact_info
) || /* contact_info is optional */
3605 (!r1
->contact_info
&& r2
->contact_info
) ||
3606 (r1
->contact_info
&& r2
->contact_info
&&
3607 strcasecmp(r1
->contact_info
, r2
->contact_info
)) ||
3608 r1
->is_hibernating
!= r2
->is_hibernating
||
3609 config_cmp_addr_policies(r1
->exit_policy
, r2
->exit_policy
))
3611 if ((r1
->declared_family
== NULL
) != (r2
->declared_family
== NULL
))
3613 if (r1
->declared_family
&& r2
->declared_family
) {
3615 if (smartlist_len(r1
->declared_family
)!=smartlist_len(r2
->declared_family
))
3617 n
= smartlist_len(r1
->declared_family
);
3618 for (i
=0; i
< n
; ++i
) {
3619 if (strcasecmp(smartlist_get(r1
->declared_family
, i
),
3620 smartlist_get(r2
->declared_family
, i
)))
3625 /* Did bandwidth change a lot? */
3626 if ((r1
->bandwidthcapacity
< r2
->bandwidthcapacity
/2) ||
3627 (r2
->bandwidthcapacity
< r1
->bandwidthcapacity
/2))
3630 /* Did more than 12 hours pass? */
3631 if (r1
->cache_info
.published_on
+ 12*60*60 < r2
->cache_info
.published_on
)
3634 /* Did uptime fail to increase by approximately the amount we would think,
3635 * give or take 30 minutes? */
3636 r1pub
= r1
->cache_info
.published_on
;
3637 r2pub
= r2
->cache_info
.published_on
;
3638 if (abs(r2
->uptime
- (r1
->uptime
+ (r2pub
- r1pub
))))
3641 /* Otherwise, the difference is cosmetic. */
3646 routerlist_assert_ok(routerlist_t
*rl
)
3648 digestmap_iter_t
*iter
;
3650 signed_descriptor_t
*sd2
;
3653 SMARTLIST_FOREACH(rl
->routers
, routerinfo_t
*, r
,
3655 r2
= digestmap_get(rl
->identity_map
, r
->cache_info
.identity_digest
);
3656 tor_assert(r
== r2
);
3657 sd2
= digestmap_get(rl
->desc_digest_map
,
3658 r
->cache_info
.signed_descriptor_digest
);
3659 tor_assert(&(r
->cache_info
) == sd2
);
3661 SMARTLIST_FOREACH(rl
->old_routers
, signed_descriptor_t
*, sd
,
3663 r2
= digestmap_get(rl
->identity_map
, sd
->identity_digest
);
3664 tor_assert(sd
!= &(r2
->cache_info
));
3665 sd2
= digestmap_get(rl
->desc_digest_map
, sd
->signed_descriptor_digest
);
3666 tor_assert(sd
== sd2
);
3668 iter
= digestmap_iter_init(rl
->identity_map
);
3669 while (!digestmap_iter_done(iter
)) {
3673 digestmap_iter_get(iter
, &d
, &_r
);
3675 tor_assert(!memcmp(r
->cache_info
.identity_digest
, d
, DIGEST_LEN
));
3676 iter
= digestmap_iter_next(rl
->identity_map
, iter
);
3678 iter
= digestmap_iter_init(rl
->desc_digest_map
);
3679 while (!digestmap_iter_done(iter
)) {
3682 signed_descriptor_t
*sd
;
3683 digestmap_iter_get(iter
, &d
, &_sd
);
3685 tor_assert(!memcmp(sd
->signed_descriptor_digest
, d
, DIGEST_LEN
));
3686 iter
= digestmap_iter_next(rl
->desc_digest_map
, iter
);