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
[] = "$Id$";
11 * maintain and access the global list of routerinfos for known
17 /****************************************************************************/
19 /** Global list of a trusted_dir_server_t object for each trusted directory
21 static smartlist_t
*trusted_dir_servers
= NULL
;
23 /* static function prototypes */
24 static routerinfo_t
*router_pick_directory_server_impl(int requireother
,
26 int for_v2_directory
);
27 static trusted_dir_server_t
*router_pick_trusteddirserver_impl(
28 int need_v1_support
, int requireother
, int fascistfirewall
);
29 static void mark_all_trusteddirservers_up(void);
30 static int router_nickname_is_in_list(routerinfo_t
*router
, const char *list
);
31 static int router_nickname_matches(routerinfo_t
*router
, const char *nickname
);
32 static void routerstatus_list_update_from_networkstatus(time_t now
);
33 static void local_routerstatus_free(local_routerstatus_t
*rs
);
34 static void trusted_dir_server_free(trusted_dir_server_t
*ds
);
35 static void update_networkstatus_cache_downloads(time_t now
);
36 static void update_networkstatus_client_downloads(time_t now
);
37 static int routerdesc_digest_is_recognized(const char *identity
,
39 static void routerlist_assert_ok(routerlist_t
*rl
);
41 /****************************************************************************/
44 * Functions to manage and access our list of known routers. (Note:
45 * dirservers maintain a separate, independent list of known router
49 /** Global list of all of the routers that we know about. */
50 static routerlist_t
*routerlist
= NULL
;
52 extern int has_fetched_directory
; /**< from main.c */
54 /** Global list of all of the current network_status documents that we know
55 * about. This list is kept sorted by published_on. */
56 static smartlist_t
*networkstatus_list
= NULL
;
57 /** Global list of local_routerstatus_t for each router, known or unknown. */
58 static smartlist_t
*routerstatus_list
= NULL
;
59 /** True iff any member of networkstatus_list has changed since the last time
60 * we called routerstatus_list_update_from_networkstatus(). */
61 static int networkstatus_list_has_changed
= 0;
62 /** True iff any element of routerstatus_list has changed since the last
63 * time we called routers_update_all_from_networkstatus().*/
64 static int routerstatus_list_has_changed
= 0;
65 /** List of strings for nicknames we've already warned about and that are
66 * still unknown / unavailable. */
67 static smartlist_t
*warned_nicknames
= NULL
;
68 /** List of strings for nicknames or fingerprints we've already warned about
69 * and that are still conflicted. */
70 static smartlist_t
*warned_conflicts
= NULL
;
72 /** The last time we tried to download any routerdesc, or 0 for "never". We
73 * use this to rate-limit download attempts when the number of routerdescs to
75 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 (fn
[0] == '.') /* skip . and .. */
106 if (strlen(fn
) != HEX_DIGEST_LEN
||
107 base16_decode(buf
, sizeof(buf
), fn
, strlen(fn
))) {
109 "Skipping cached-status file with unexpected name \"%s\"",fn
);
112 tor_snprintf(filename
,sizeof(filename
),"%s/cached-status/%s",
113 get_options()->DataDirectory
, fn
);
114 s
= read_file_to_str(filename
, 0);
117 if (router_set_networkstatus(s
, st
.st_mtime
, NS_FROM_CACHE
, NULL
)<0) {
118 warn(LD_FS
, "Couldn't load networkstatus from \"%s\"",filename
);
123 SMARTLIST_FOREACH(entries
, char *, fn
, tor_free(fn
));
124 smartlist_free(entries
);
125 networkstatus_list_clean(time(NULL
));
126 routers_update_all_from_networkstatus();
130 /* Router descriptor storage.
132 * Routerdescs are stored in a big file, named "cached-routers". As new
133 * routerdescs arrive, we append them to a journal file named
134 * "cached-routers.new".
136 * From time to time, we replace "cached-routers" with a new file containing
137 * only the live, non-superseded descriptors, and clear cached-routers.new.
139 * On startup, we read both files.
142 /** The size of the router log, in bytes. */
143 static size_t router_journal_len
= 0;
144 /** The size of the router store, in bytes. */
145 static size_t router_store_len
= 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;
155 return router_journal_len
> (1<<15);
158 /** Add the <b>len</b>-type router descriptor in <b>s</b> to the router
161 router_append_to_journal(const char *s
, size_t len
)
163 or_options_t
*options
= get_options();
164 size_t fname_len
= strlen(options
->DataDirectory
)+32;
165 char *fname
= tor_malloc(len
);
167 tor_snprintf(fname
, fname_len
, "%s/cached-routers.new",
168 options
->DataDirectory
);
173 if (append_bytes_to_file(fname
, s
, len
, 0)) {
174 warn(LD_FS
, "Unable to store router descriptor");
180 router_journal_len
+= len
;
184 /** If the journal is too long, or if <b>force</b> is true, then atomically
185 * replace the router store with the routers currently in our routerlist, and
186 * clear the journal. Return 0 on success, -1 on failure.
189 router_rebuild_store(int force
)
192 or_options_t
*options
;
194 smartlist_t
*chunk_list
= NULL
;
198 if (!force
&& !router_should_rebuild_store())
203 /* Don't save deadweight. */
204 routerlist_remove_old_routers(ROUTER_MAX_AGE
);
206 options
= get_options();
207 fname_len
= strlen(options
->DataDirectory
)+32;
208 fname
= tor_malloc(fname_len
);
209 tor_snprintf(fname
, fname_len
, "%s/cached-routers", options
->DataDirectory
);
210 chunk_list
= smartlist_create();
212 for (i
= 0; i
< 2; ++i
) {
213 smartlist_t
*lst
= (i
== 0) ? routerlist
->old_routers
: routerlist
->routers
;
214 SMARTLIST_FOREACH(lst
, routerinfo_t
*, ri
,
217 if (!ri
->signed_descriptor
) {
218 warn(LD_BUG
, "Bug! No descriptor stored for router '%s'.",
222 c
= tor_malloc(sizeof(sized_chunk_t
));
223 c
->bytes
= ri
->signed_descriptor
;
224 c
->len
= ri
->signed_descriptor_len
;
225 smartlist_add(chunk_list
, c
);
228 if (write_chunks_to_file(fname
, chunk_list
, 0)<0) {
229 warn(LD_FS
, "Error writing router store to disk.");
233 tor_snprintf(fname
, fname_len
, "%s/cached-routers.new",
234 options
->DataDirectory
);
236 write_str_to_file(fname
, "", 0);
239 router_store_len
= len
;
240 router_journal_len
= 0;
244 SMARTLIST_FOREACH(chunk_list
, sized_chunk_t
*, c
, tor_free(c
));
245 smartlist_free(chunk_list
);
250 /* Load all cached router descriptors from the store. Return 0 on success and
254 router_reload_router_list(void)
256 or_options_t
*options
= get_options();
257 size_t fname_len
= strlen(options
->DataDirectory
)+32;
258 char *fname
= tor_malloc(fname_len
);
263 router_get_routerlist();
265 router_journal_len
= router_store_len
= 0;
267 for (j
= 0; j
< 2; ++j
) {
269 tor_snprintf(fname
, fname_len
,
270 (j
==0)?"%s/cached-routers":"%s/cached-routers.new",
271 options
->DataDirectory
);
272 contents
= read_file_to_str(fname
, 0);
276 router_store_len
= st
.st_size
;
278 router_journal_len
= st
.st_size
;
279 router_load_routers_from_string(contents
, 1, NULL
);
285 /* Don't cache expired routers. */
286 routerlist_remove_old_routers(ROUTER_MAX_AGE
);
288 if (router_journal_len
) {
289 /* Always clear the journal on startup.*/
290 router_rebuild_store(1);
295 /** Set *<b>outp</b> to a smartlist containing a list of
296 * trusted_dir_server_t * for all known trusted dirservers. Callers
297 * must not modify the list or its contents.
300 router_get_trusted_dir_servers(smartlist_t
**outp
)
302 if (!trusted_dir_servers
)
303 trusted_dir_servers
= smartlist_create();
305 *outp
= trusted_dir_servers
;
308 /** Try to find a running dirserver. If there are no running dirservers
309 * in our routerlist and <b>retry_if_no_servers</b> is non-zero,
310 * set all the authoritative ones as running again, and pick one;
311 * if there are then no dirservers at all in our routerlist,
312 * reload the routerlist and try one last time. If for_runningrouters is
313 * true, then only pick a dirserver that can answer runningrouters queries
314 * (that is, a trusted dirserver, or one running 0.0.9rc5-cvs or later).
315 * Other args are as in router_pick_directory_server_impl().
318 router_pick_directory_server(int requireother
,
320 int for_v2_directory
,
321 int retry_if_no_servers
)
323 routerinfo_t
*choice
;
328 choice
= router_pick_directory_server_impl(requireother
, fascistfirewall
,
330 if (choice
|| !retry_if_no_servers
)
333 info(LD_DIR
,"No reachable router entries for dirservers. Trying them all again.");
334 /* mark all authdirservers as up again */
335 mark_all_trusteddirservers_up();
337 choice
= router_pick_directory_server_impl(requireother
, fascistfirewall
,
342 info(LD_DIR
,"Still no %s router entries. Reloading and trying again.",
343 firewall_is_fascist() ? "reachable" : "known");
344 has_fetched_directory
=0; /* reset it */
345 if (router_reload_router_list()) {
348 /* give it one last try */
349 choice
= router_pick_directory_server_impl(requireother
, 0,
354 trusted_dir_server_t
*
355 router_get_trusteddirserver_by_digest(const char *digest
)
357 if (!trusted_dir_servers
)
360 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ds
,
362 if (!memcmp(ds
->digest
, digest
, DIGEST_LEN
))
369 /** Try to find a running trusted dirserver. If there are no running
370 * trusted dirservers and <b>retry_if_no_servers</b> is non-zero,
371 * set them all as running again, and try again.
372 * Other args are as in router_pick_trusteddirserver_impl().
374 trusted_dir_server_t
*
375 router_pick_trusteddirserver(int need_v1_support
,
378 int retry_if_no_servers
)
380 trusted_dir_server_t
*choice
;
382 choice
= router_pick_trusteddirserver_impl(need_v1_support
,
383 requireother
, fascistfirewall
);
384 if (choice
|| !retry_if_no_servers
)
387 info(LD_DIR
,"No trusted dirservers are reachable. Trying them all again.");
388 mark_all_trusteddirservers_up();
389 return router_pick_trusteddirserver_impl(need_v1_support
,
390 requireother
, fascistfirewall
);
393 /** Pick a random running verified directory server/mirror from our
395 * If <b>fascistfirewall</b> and we're not using a proxy,
396 * make sure the port we pick is allowed by options-\>firewallports.
397 * If <b>requireother</b>, it cannot be us. If <b>for_v2_directory</b>,
398 * choose a directory server new enough to support the v2 directory
401 static routerinfo_t
*
402 router_pick_directory_server_impl(int requireother
, int fascistfirewall
,
403 int for_v2_directory
)
405 routerinfo_t
*result
;
411 if (get_options()->HttpProxy
)
414 /* Find all the running dirservers we know about. */
415 sl
= smartlist_create();
416 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
418 if (!router
->is_running
|| !router
->dir_port
|| !router
->is_verified
)
420 if (requireother
&& router_is_me(router
))
422 if (fascistfirewall
) {
423 if (!fascist_firewall_allows_address(router
->addr
, router
->dir_port
))
426 /* Before 0.1.1.6-alpha, only trusted dirservers served status info.
427 * Before 0.1.1.7-alpha, retrieving nonexistent server IDs could bork
428 * the directory server.
430 if (for_v2_directory
&&
431 !(tor_version_as_new_as(router
->platform
,"0.1.1.7-alpha") ||
432 router_digest_is_trusted_dir(router
->identity_digest
)))
434 smartlist_add(sl
, router
);
437 result
= smartlist_choose(sl
);
442 /** Choose randomly from among the trusted dirservers that are up.
443 * If <b>fascistfirewall</b> and we're not using a proxy,
444 * make sure the port we pick is allowed by options-\>firewallports.
445 * If <b>requireother</b>, it cannot be us. If <b>need_v1_support</b>, choose
446 * a trusted authority for the v1 directory system.
448 static trusted_dir_server_t
*
449 router_pick_trusteddirserver_impl(int need_v1_support
,
450 int requireother
, int fascistfirewall
)
454 trusted_dir_server_t
*ds
;
455 sl
= smartlist_create();
456 me
= router_get_my_routerinfo();
458 if (!trusted_dir_servers
)
461 if (get_options()->HttpProxy
)
464 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, d
,
466 if (!d
->is_running
) continue;
467 if (need_v1_support
&& !d
->supports_v1_protocol
)
469 if (requireother
&& me
&&
470 !memcmp(me
->identity_digest
, d
->digest
, DIGEST_LEN
))
472 if (fascistfirewall
) {
473 if (!fascist_firewall_allows_address(d
->addr
, d
->dir_port
))
476 smartlist_add(sl
, d
);
479 ds
= smartlist_choose(sl
);
484 /** Go through and mark the authoritative dirservers as up. */
486 mark_all_trusteddirservers_up(void)
489 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
490 if (router_digest_is_trusted_dir(router
->identity_digest
) &&
491 router
->dir_port
> 0) {
492 router
->is_running
= 1;
495 if (trusted_dir_servers
) {
496 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, dir
,
499 dir
->n_networkstatus_failures
= 0;
502 last_networkstatus_download_attempted
= 0;
505 /** Reset all internal variables used to count failed downloads of network
508 router_reset_status_download_failures(void)
510 mark_all_trusteddirservers_up();
513 /** Return 0 if \\exists an authoritative dirserver that's currently
514 * thought to be running, else return 1.
517 all_trusted_directory_servers_down(void)
519 if (!trusted_dir_servers
)
521 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, dir
,
522 if (dir
->is_running
) return 0);
526 /** Add all the family of <b>router</b> to the smartlist <b>sl</b>.
527 * This is used to make sure we don't pick siblings in a single path.
530 routerlist_add_family(smartlist_t
*sl
, routerinfo_t
*router
)
535 if (!router
->declared_family
)
538 /* Add every r such that router declares familyness with r, and r
539 * declares familyhood with router. */
540 SMARTLIST_FOREACH(router
->declared_family
, const char *, n
,
542 if (!(r
= router_get_by_nickname(n
, 0)))
544 if (!r
->declared_family
)
546 SMARTLIST_FOREACH(r
->declared_family
, const char *, n2
,
548 if (router_nickname_matches(router
, n2
))
549 smartlist_add(sl
, r
);
553 /* If the user declared any families locally, honor those too. */
554 for (cl
= get_options()->NodeFamilies
; cl
; cl
= cl
->next
) {
555 if (router_nickname_is_in_list(router
, cl
->value
)) {
556 add_nickname_list_to_smartlist(sl
, cl
->value
, 1, 1);
561 /** Given a comma-and-whitespace separated list of nicknames, see which
562 * nicknames in <b>list</b> name routers in our routerlist that are
563 * currently running. Add the routerinfos for those routers to <b>sl</b>.
566 add_nickname_list_to_smartlist(smartlist_t
*sl
, const char *list
, int warn_if_down
, int warn_if_unnamed
)
568 routerinfo_t
*router
;
569 smartlist_t
*nickname_list
;
572 return; /* nothing to do */
575 nickname_list
= smartlist_create();
576 if (!warned_nicknames
)
577 warned_nicknames
= smartlist_create();
579 smartlist_split_string(nickname_list
, list
, ",",
580 SPLIT_SKIP_SPACE
|SPLIT_IGNORE_BLANK
, 0);
582 SMARTLIST_FOREACH(nickname_list
, const char *, nick
, {
584 if (!is_legal_nickname_or_hexdigest(nick
)) {
585 warn(LD_CONFIG
, "Nickname %s is misformed; skipping", nick
);
588 router
= router_get_by_nickname(nick
, warn_if_unnamed
);
589 warned
= smartlist_string_isin(warned_nicknames
, nick
);
591 if (router
->is_running
) {
592 smartlist_add(sl
,router
);
594 smartlist_string_remove(warned_nicknames
, nick
);
597 log_fn(warn_if_down
? LOG_WARN
: LOG_DEBUG
, LD_CONFIG
,
598 "Nickname list includes '%s' which is known but down.",nick
);
599 smartlist_add(warned_nicknames
, tor_strdup(nick
));
604 log_fn(has_fetched_directory
? LOG_WARN
: LOG_INFO
, LD_CONFIG
,
605 "Nickname list includes '%s' which isn't a known router.",nick
);
606 smartlist_add(warned_nicknames
, tor_strdup(nick
));
610 SMARTLIST_FOREACH(nickname_list
, char *, nick
, tor_free(nick
));
611 smartlist_free(nickname_list
);
614 /** Return 1 iff any member of the comma-separated list <b>list</b> is an
615 * acceptable nickname or hexdigest for <b>router</b>. Else return 0.
618 router_nickname_is_in_list(routerinfo_t
*router
, const char *list
)
620 smartlist_t
*nickname_list
;
624 return 0; /* definitely not */
627 nickname_list
= smartlist_create();
628 smartlist_split_string(nickname_list
, list
, ",",
629 SPLIT_SKIP_SPACE
|SPLIT_IGNORE_BLANK
, 0);
630 SMARTLIST_FOREACH(nickname_list
, const char *, cp
,
631 if (router_nickname_matches(router
, cp
)) {v
=1;break;});
632 SMARTLIST_FOREACH(nickname_list
, char *, cp
, tor_free(cp
));
633 smartlist_free(nickname_list
);
637 /** Add every router from our routerlist that is currently running to
641 router_add_running_routers_to_smartlist(smartlist_t
*sl
, int allow_unverified
,
642 int need_uptime
, int need_capacity
)
647 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
649 if (router
->is_running
&&
650 (router
->is_verified
||
652 !router_is_unreliable(router
, need_uptime
, need_capacity
)))) {
653 /* If it's running, and either it's verified or we're ok picking
654 * unverified routers and this one is suitable.
656 smartlist_add(sl
, router
);
661 /** Look through the routerlist until we find a router that has my key.
664 routerlist_find_my_routerinfo(void)
669 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
671 if (router_is_me(router
))
677 /** Find a router that's up, that has this IP address, and
678 * that allows exit to this address:port, or return NULL if there
682 router_find_exact_exit_enclave(const char *address
, uint16_t port
)
687 if (!tor_inet_aton(address
, &in
))
688 return NULL
; /* it's not an IP already */
689 addr
= ntohl(in
.s_addr
);
691 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
693 if (router
->is_running
&&
694 router
->addr
== addr
&&
695 router_compare_addr_to_addr_policy(addr
, port
, router
->exit_policy
) ==
696 ADDR_POLICY_ACCEPTED
)
702 /** Return 1 if <b>router</b> is not suitable for these parameters, else 0.
703 * If <b>need_uptime</b> is non-zero, we require a minimum uptime.
704 * If <b>need_capacity</b> is non-zero, we require a minimum advertised
708 router_is_unreliable(routerinfo_t
*router
, int need_uptime
, int need_capacity
)
710 if (need_uptime
&& router
->uptime
< ROUTER_REQUIRED_MIN_UPTIME
)
712 if (need_capacity
&& router
->bandwidthcapacity
< ROUTER_REQUIRED_MIN_BANDWIDTH
)
717 /** Remove from routerlist <b>sl</b> all routers who have a low uptime. */
719 routerlist_sl_remove_unreliable_routers(smartlist_t
*sl
)
722 routerinfo_t
*router
;
724 for (i
= 0; i
< smartlist_len(sl
); ++i
) {
725 router
= smartlist_get(sl
, i
);
726 if (router_is_unreliable(router
, 1, 0)) {
727 // log(LOG_DEBUG, "Router '%s' has insufficient uptime; deleting.",
728 // router->nickname);
729 smartlist_del(sl
, i
--);
734 #define MAX_BELIEVABLE_BANDWIDTH 2000000 /* 2 MB/sec */
736 /** Choose a random element of router list <b>sl</b>, weighted by
737 * the advertised bandwidth of each router.
740 routerlist_sl_choose_by_bandwidth(smartlist_t
*sl
)
743 routerinfo_t
*router
;
744 smartlist_t
*bandwidths
;
745 uint32_t this_bw
, tmp
, total_bw
=0, rand_bw
;
748 /* First count the total bandwidth weight, and make a smartlist
750 bandwidths
= smartlist_create();
751 for (i
= 0; i
< smartlist_len(sl
); ++i
) {
752 router
= smartlist_get(sl
, i
);
753 this_bw
= (router
->bandwidthcapacity
< router
->bandwidthrate
) ?
754 router
->bandwidthcapacity
: router
->bandwidthrate
;
755 /* if they claim something huge, don't believe it */
756 if (this_bw
> MAX_BELIEVABLE_BANDWIDTH
)
757 this_bw
= MAX_BELIEVABLE_BANDWIDTH
;
758 p
= tor_malloc(sizeof(uint32_t));
760 smartlist_add(bandwidths
, p
);
764 SMARTLIST_FOREACH(bandwidths
, uint32_t*, p
, tor_free(p
));
765 smartlist_free(bandwidths
);
766 return smartlist_choose(sl
);
768 /* Second, choose a random value from the bandwidth weights. */
769 rand_bw
= crypto_rand_int(total_bw
);
770 /* Last, count through sl until we get to the element we picked */
773 tor_assert(i
< smartlist_len(sl
));
774 p
= smartlist_get(bandwidths
, i
);
779 SMARTLIST_FOREACH(bandwidths
, uint32_t*, p
, tor_free(p
));
780 smartlist_free(bandwidths
);
781 return (routerinfo_t
*)smartlist_get(sl
, i
);
784 /** Return a random running router from the routerlist. If any node
785 * named in <b>preferred</b> is available, pick one of those. Never
786 * pick a node named in <b>excluded</b>, or whose routerinfo is in
787 * <b>excludedsmartlist</b>, even if they are the only nodes
788 * available. If <b>strict</b> is true, never pick any node besides
789 * those in <b>preferred</b>.
790 * If <b>need_uptime</b> is non-zero, don't return a router with less
791 * than a minimum uptime.
792 * If <b>need_capacity</b> is non-zero, weight your choice by the
793 * advertised capacity of each router.
796 router_choose_random_node(const char *preferred
,
797 const char *excluded
,
798 smartlist_t
*excludedsmartlist
,
799 int need_uptime
, int need_capacity
,
800 int allow_unverified
, int strict
)
802 smartlist_t
*sl
, *excludednodes
;
803 routerinfo_t
*choice
;
805 excludednodes
= smartlist_create();
806 add_nickname_list_to_smartlist(excludednodes
,excluded
,0,1);
808 /* Try the preferred nodes first. Ignore need_uptime and need_capacity,
809 * since the user explicitly asked for these nodes. */
810 sl
= smartlist_create();
811 add_nickname_list_to_smartlist(sl
,preferred
,1,1);
812 smartlist_subtract(sl
,excludednodes
);
813 if (excludedsmartlist
)
814 smartlist_subtract(sl
,excludedsmartlist
);
815 choice
= smartlist_choose(sl
);
817 if (!choice
&& !strict
) {
818 /* Then give up on our preferred choices: any node
819 * will do that has the required attributes. */
820 sl
= smartlist_create();
821 router_add_running_routers_to_smartlist(sl
, allow_unverified
,
822 need_uptime
, need_capacity
);
823 smartlist_subtract(sl
,excludednodes
);
824 if (excludedsmartlist
)
825 smartlist_subtract(sl
,excludedsmartlist
);
827 routerlist_sl_remove_unreliable_routers(sl
);
829 choice
= routerlist_sl_choose_by_bandwidth(sl
);
831 choice
= smartlist_choose(sl
);
834 smartlist_free(excludednodes
);
836 warn(LD_CIRC
,"No available nodes when trying to choose node. Failing.");
840 /** Return true iff the digest of <b>router</b>'s identity key,
841 * encoded in hexadecimal, matches <b>hexdigest</b> (which is
842 * optionally prefixed with a single dollar sign). Return false if
843 * <b>hexdigest</b> is malformed, or it doesn't match. */
845 router_hex_digest_matches(routerinfo_t
*router
, const char *hexdigest
)
847 char digest
[DIGEST_LEN
];
848 tor_assert(hexdigest
);
849 if (hexdigest
[0] == '$')
852 if (strlen(hexdigest
) != HEX_DIGEST_LEN
||
853 base16_decode(digest
, DIGEST_LEN
, hexdigest
, HEX_DIGEST_LEN
)<0)
855 return (!memcmp(digest
, router
->identity_digest
, DIGEST_LEN
));
858 /** Return true if <b>router</b>'s nickname matches <b>nickname</b>
859 * (case-insensitive), or if <b>router's</b> identity key digest
860 * matches a hexadecimal value stored in <b>nickname</b>. Return
861 * false otherwise. */
863 router_nickname_matches(routerinfo_t
*router
, const char *nickname
)
865 if (nickname
[0]!='$' && !strcasecmp(router
->nickname
, nickname
))
867 return router_hex_digest_matches(router
, nickname
);
870 /** Return the router in our routerlist whose (case-insensitive)
871 * nickname or (case-sensitive) hexadecimal key digest is
872 * <b>nickname</b>. Return NULL if no such router is known.
875 router_get_by_nickname(const char *nickname
, int warn_if_unnamed
)
878 char digest
[DIGEST_LEN
];
879 routerinfo_t
*best_match
=NULL
;
882 tor_assert(nickname
);
885 if (nickname
[0] == '$')
886 return router_get_by_hexdigest(nickname
);
887 if (server_mode(get_options()) &&
888 !strcasecmp(nickname
, get_options()->Nickname
))
889 return router_get_my_routerinfo();
891 maybedigest
= (strlen(nickname
) == HEX_DIGEST_LEN
) &&
892 (base16_decode(digest
,DIGEST_LEN
,nickname
,HEX_DIGEST_LEN
) == 0);
894 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
896 if (!strcasecmp(router
->nickname
, nickname
)) {
897 if (router
->is_named
)
903 } else if (maybedigest
&&
904 !memcmp(digest
, router
->identity_digest
, DIGEST_LEN
)) {
910 if (warn_if_unnamed
&& n_matches
> 1) {
911 smartlist_t
*fps
= smartlist_create();
912 int any_unwarned
= 0;
913 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
915 local_routerstatus_t
*rs
;
918 char fp
[HEX_DIGEST_LEN
+1];
919 if (strcasecmp(router
->nickname
, nickname
))
921 rs
=router_get_combined_status_by_digest(router
->identity_digest
);
922 if (!rs
->name_lookup_warned
) {
923 rs
->name_lookup_warned
= 1;
926 base16_encode(fp
, sizeof(fp
), router
->identity_digest
, DIGEST_LEN
);
927 dlen
= 32 + HEX_DIGEST_LEN
+ strlen(router
->address
);
928 desc
= tor_malloc(dlen
);
929 tor_snprintf(desc
, dlen
, "\"$%s\" for the one at %s:%d",
930 fp
, router
->address
, router
->or_port
);
931 smartlist_add(fps
, desc
);
934 char *alternatives
= smartlist_join_strings(fps
, "; ",0,NULL
);
935 warn(LD_CONFIG
, "There are multiple matches for the nickname \"%s\","
936 " but none is listed as named by the directory authories. "
937 "Choosing one arbitrarily. If you meant one in particular, "
938 "you should say %s.", nickname
, alternatives
);
939 tor_free(alternatives
);
941 SMARTLIST_FOREACH(fps
, char *, cp
, tor_free(cp
));
943 } else if (warn_if_unnamed
) {
944 local_routerstatus_t
*rs
=
945 router_get_combined_status_by_digest(best_match
->identity_digest
);
946 if (rs
&& !rs
->name_lookup_warned
) {
947 char fp
[HEX_DIGEST_LEN
+1];
948 base16_encode(fp
, sizeof(fp
), best_match
->identity_digest
, DIGEST_LEN
);
949 warn(LD_CONFIG
, "You specified a server \"%s\" by name, but the "
950 "directory authorities do not have a listing for this name. "
951 "To make sure you get the same server in the future, refer to "
952 "it by key, as \"$%s\".", nickname
, fp
);
953 rs
->name_lookup_warned
= 1;
962 /** Return true iff <b>digest</b> is the digest of the identity key of
963 * a trusted directory. */
965 router_digest_is_trusted_dir(const char *digest
)
967 if (!trusted_dir_servers
)
969 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ent
,
970 if (!memcmp(digest
, ent
->digest
, DIGEST_LEN
)) return 1);
974 /** Return the router in our routerlist whose hexadecimal key digest
975 * is <b>hexdigest</b>. Return NULL if no such router is known. */
977 router_get_by_hexdigest(const char *hexdigest
)
979 char digest
[DIGEST_LEN
];
981 tor_assert(hexdigest
);
984 if (hexdigest
[0]=='$')
986 if (strlen(hexdigest
) != HEX_DIGEST_LEN
||
987 base16_decode(digest
,DIGEST_LEN
,hexdigest
,HEX_DIGEST_LEN
) < 0)
990 return router_get_by_digest(digest
);
993 /** Return the router in our routerlist whose 20-byte key digest
994 * is <b>digest</b>. Return NULL if no such router is known. */
996 router_get_by_digest(const char *digest
)
1000 if (!routerlist
) return NULL
;
1002 // routerlist_assert_ok(routerlist);
1004 return digestmap_get(routerlist
->identity_map
, digest
);
1007 /** Return the router in our routerlist whose 20-byte descriptor
1008 * is <b>digest</b>. Return NULL if no such router is known. */
1010 router_get_by_descriptor_digest(const char *digest
)
1014 if (!routerlist
) return NULL
;
1016 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
1018 if (0 == memcmp(router
->signed_descriptor_digest
, digest
, DIGEST_LEN
))
1025 /** Return the current list of all known routers. */
1027 router_get_routerlist(void)
1030 routerlist
= tor_malloc_zero(sizeof(routerlist_t
));
1031 routerlist
->routers
= smartlist_create();
1032 routerlist
->old_routers
= smartlist_create();
1033 routerlist
->identity_map
= digestmap_new();
1034 routerlist
->desc_digest_map
= digestmap_new();
1039 /** Free all storage held by <b>router</b>. */
1041 routerinfo_free(routerinfo_t
*router
)
1046 tor_free(router
->signed_descriptor
);
1047 tor_free(router
->address
);
1048 tor_free(router
->nickname
);
1049 tor_free(router
->platform
);
1050 tor_free(router
->contact_info
);
1051 if (router
->onion_pkey
)
1052 crypto_free_pk_env(router
->onion_pkey
);
1053 if (router
->identity_pkey
)
1054 crypto_free_pk_env(router
->identity_pkey
);
1055 if (router
->declared_family
) {
1056 SMARTLIST_FOREACH(router
->declared_family
, char *, s
, tor_free(s
));
1057 smartlist_free(router
->declared_family
);
1059 addr_policy_free(router
->exit_policy
);
1063 /** Allocate a fresh copy of <b>router</b> */
1065 routerinfo_copy(const routerinfo_t
*router
)
1068 addr_policy_t
**e
, *tmp
;
1070 r
= tor_malloc(sizeof(routerinfo_t
));
1071 memcpy(r
, router
, sizeof(routerinfo_t
));
1073 r
->address
= tor_strdup(r
->address
);
1074 r
->nickname
= tor_strdup(r
->nickname
);
1075 r
->platform
= tor_strdup(r
->platform
);
1076 if (r
->signed_descriptor
)
1077 r
->signed_descriptor
= tor_strdup(r
->signed_descriptor
);
1079 r
->onion_pkey
= crypto_pk_dup_key(r
->onion_pkey
);
1080 if (r
->identity_pkey
)
1081 r
->identity_pkey
= crypto_pk_dup_key(r
->identity_pkey
);
1082 e
= &r
->exit_policy
;
1084 tmp
= tor_malloc(sizeof(addr_policy_t
));
1085 memcpy(tmp
,*e
,sizeof(addr_policy_t
));
1087 (*e
)->string
= tor_strdup((*e
)->string
);
1090 if (r
->declared_family
) {
1091 r
->declared_family
= smartlist_create();
1092 SMARTLIST_FOREACH(router
->declared_family
, const char *, s
,
1093 smartlist_add(r
->declared_family
, tor_strdup(s
)));
1098 /** Free all storage held by a routerlist <b>rl</b> */
1100 routerlist_free(routerlist_t
*rl
)
1103 digestmap_free(rl
->identity_map
, NULL
);
1104 digestmap_free(rl
->desc_digest_map
, NULL
);
1105 SMARTLIST_FOREACH(rl
->routers
, routerinfo_t
*, r
,
1106 routerinfo_free(r
));
1107 SMARTLIST_FOREACH(rl
->old_routers
, routerinfo_t
*, r
,
1108 routerinfo_free(r
));
1109 smartlist_free(rl
->routers
);
1110 smartlist_free(rl
->old_routers
);
1115 _routerlist_find_elt(smartlist_t
*sl
, routerinfo_t
*ri
, int idx
)
1117 if (idx
< 0 || smartlist_get(sl
, idx
) != ri
) {
1119 SMARTLIST_FOREACH(sl
, routerinfo_t
*, r
,
1128 /** Insert an item <b>ri</b> into the routerlist <b>rl</b>, updating indices
1131 routerlist_insert(routerlist_t
*rl
, routerinfo_t
*ri
)
1133 digestmap_set(rl
->identity_map
, ri
->identity_digest
, ri
);
1134 digestmap_set(rl
->desc_digest_map
, ri
->signed_descriptor_digest
, ri
);
1135 smartlist_add(rl
->routers
, ri
);
1136 // routerlist_assert_ok(rl);
1140 routerlist_insert_old(routerlist_t
*rl
, routerinfo_t
*ri
)
1142 if (get_options()->DirPort
) {
1143 digestmap_set(rl
->desc_digest_map
, ri
->signed_descriptor_digest
, ri
);
1144 smartlist_add(rl
->old_routers
, ri
);
1146 routerinfo_free(ri
);
1148 // routerlist_assert_ok(rl);
1151 /** Remove an item <b>ri</b> into the routerlist <b>rl</b>, updating indices
1152 * as needed. If <b>idx</b> is nonnegative and smartlist_get(rl->routers,
1153 * idx) == ri, we don't need to do a linear search over the list to decide
1154 * which to remove. We fill the gap rl->routers with a later element in
1155 * the list, if any exists. ri is freed..*/
1157 routerlist_remove(routerlist_t
*rl
, routerinfo_t
*ri
, int idx
, int make_old
)
1159 routerinfo_t
*ri_tmp
;
1160 idx
= _routerlist_find_elt(rl
->routers
, ri
, idx
);
1163 smartlist_del(rl
->routers
, idx
);
1164 ri_tmp
= digestmap_remove(rl
->identity_map
, ri
->identity_digest
);
1165 tor_assert(ri_tmp
== ri
);
1166 if (make_old
&& get_options()->DirPort
) {
1167 smartlist_add(rl
->old_routers
, ri
);
1169 ri_tmp
= digestmap_remove(rl
->desc_digest_map
,
1170 ri
->signed_descriptor_digest
);
1171 tor_assert(ri_tmp
== ri
);
1172 routerinfo_free(ri
);
1174 // routerlist_assert_ok(rl);
1178 routerlist_remove_old(routerlist_t
*rl
, routerinfo_t
*ri
, int idx
)
1180 routerinfo_t
*ri_tmp
;
1181 idx
= _routerlist_find_elt(rl
->old_routers
, ri
, idx
);
1184 smartlist_del(rl
->old_routers
, idx
);
1185 ri_tmp
= digestmap_remove(rl
->desc_digest_map
,
1186 ri
->signed_descriptor_digest
);
1187 tor_assert(ri_tmp
== ri
);
1188 routerinfo_free(ri
);
1189 // routerlist_assert_ok(rl);
1192 /** Remove <b>ri_old</b> from the routerlist <b>rl</b>, and replace it with
1193 * <b>ri_new</b>, updating all index info. If <b>idx</b> is nonnegative and
1194 * smartlist_get(rl->routers, idx) == ri, we don't need to do a linear
1195 * search over the list to decide which to remove. We put ri_new in the same
1196 * index as ri_old, if possible. ri is freed as appropriate */
1198 routerlist_replace(routerlist_t
*rl
, routerinfo_t
*ri_old
,
1199 routerinfo_t
*ri_new
, int idx
, int make_old
)
1201 tor_assert(ri_old
!= ri_new
);
1202 idx
= _routerlist_find_elt(rl
->routers
, ri_old
, idx
);
1204 smartlist_set(rl
->routers
, idx
, ri_new
);
1206 warn(LD_BUG
, "Appending entry from routerlist_replace.");
1207 routerlist_insert(rl
, ri_new
);
1210 if (memcmp(ri_old
->identity_digest
, ri_new
->identity_digest
, DIGEST_LEN
)) {
1211 /* digests don't match; digestmap_set won't replace */
1212 digestmap_remove(rl
->identity_map
, ri_old
->identity_digest
);
1214 digestmap_set(rl
->identity_map
, ri_new
->identity_digest
, ri_new
);
1215 digestmap_set(rl
->desc_digest_map
, ri_new
->signed_descriptor_digest
, ri_new
);
1217 if (make_old
&& get_options()->DirPort
) {
1218 smartlist_add(rl
->old_routers
, ri_old
);
1220 if (memcmp(ri_old
->signed_descriptor_digest
,
1221 ri_new
->signed_descriptor_digest
,
1223 /* digests don't match; digestmap_set didn't replace */
1224 digestmap_remove(rl
->desc_digest_map
, ri_old
->signed_descriptor_digest
);
1226 routerinfo_free(ri_old
);
1228 // routerlist_assert_ok(rl);
1231 /** Free all memory held by the rouerlist module */
1233 routerlist_free_all(void)
1236 routerlist_free(routerlist
);
1238 if (warned_nicknames
) {
1239 SMARTLIST_FOREACH(warned_nicknames
, char *, cp
, tor_free(cp
));
1240 smartlist_free(warned_nicknames
);
1241 warned_nicknames
= NULL
;
1243 if (warned_conflicts
) {
1244 SMARTLIST_FOREACH(warned_conflicts
, char *, cp
, tor_free(cp
));
1245 smartlist_free(warned_conflicts
);
1246 warned_conflicts
= NULL
;
1248 if (trusted_dir_servers
) {
1249 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ds
,
1250 trusted_dir_server_free(ds
));
1251 smartlist_free(trusted_dir_servers
);
1252 trusted_dir_servers
= NULL
;
1254 if (networkstatus_list
) {
1255 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
1256 networkstatus_free(ns
));
1257 smartlist_free(networkstatus_list
);
1258 networkstatus_list
= NULL
;
1260 if (routerstatus_list
) {
1261 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
1262 local_routerstatus_free(rs
));
1263 smartlist_free(routerstatus_list
);
1264 routerstatus_list
= NULL
;
1268 /** Free all storage held by the routerstatus object <b>rs</b>. */
1270 routerstatus_free(routerstatus_t
*rs
)
1275 /** Free all storage held by the local_routerstatus object <b>rs</b>. */
1277 local_routerstatus_free(local_routerstatus_t
*rs
)
1282 /** Free all storage held by the networkstatus object <b>ns</b>. */
1284 networkstatus_free(networkstatus_t
*ns
)
1286 tor_free(ns
->source_address
);
1287 tor_free(ns
->contact
);
1288 if (ns
->signing_key
)
1289 crypto_free_pk_env(ns
->signing_key
);
1290 tor_free(ns
->client_versions
);
1291 tor_free(ns
->server_versions
);
1293 SMARTLIST_FOREACH(ns
->entries
, routerstatus_t
*, rs
, routerstatus_free(rs
));
1294 smartlist_free(ns
->entries
);
1299 /** Forget that we have issued any router-related warnings, so that we'll
1300 * warn again if we see the same errors. */
1302 routerlist_reset_warnings(void)
1304 if (!warned_nicknames
)
1305 warned_nicknames
= smartlist_create();
1306 SMARTLIST_FOREACH(warned_nicknames
, char *, cp
, tor_free(cp
));
1307 smartlist_clear(warned_nicknames
); /* now the list is empty. */
1309 if (!warned_conflicts
)
1310 warned_conflicts
= smartlist_create();
1311 SMARTLIST_FOREACH(warned_conflicts
, char *, cp
, tor_free(cp
));
1312 smartlist_clear(warned_conflicts
); /* now the list is empty. */
1314 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
1315 rs
->name_lookup_warned
= 0);
1317 have_warned_about_unverified_status
= 0;
1318 have_warned_about_old_version
= 0;
1319 have_warned_about_new_version
= 0;
1322 /** Mark the router with ID <b>digest</b> as non-running in our routerlist. */
1324 router_mark_as_down(const char *digest
)
1326 routerinfo_t
*router
;
1329 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, d
,
1330 if (!memcmp(d
->digest
, digest
, DIGEST_LEN
))
1333 router
= router_get_by_digest(digest
);
1334 if (!router
) /* we don't seem to know about him in the first place */
1336 debug(LD_DIR
,"Marking router '%s' as down.",router
->nickname
);
1337 if (router_is_me(router
) && !we_are_hibernating())
1338 warn(LD_NET
, "We just marked ourself as down. Are your external addresses reachable?");
1339 router
->is_running
= 0;
1342 /** Add <b>router</b> to the routerlist, if we don't already have it. Replace
1343 * older entries (if any) with the same key. Note: Callers should not hold
1344 * their pointers to <b>router</b> if this function fails; <b>router</b>
1345 * will either be inserted into the routerlist or freed.
1347 * Returns >= 0 if the router was added; less than 0 if it was not.
1349 * If we're returning non-zero, then assign to *<b>msg</b> a static string
1350 * describing the reason for not liking the routerinfo.
1352 * If the return value is less than -1, there was a problem with the
1353 * routerinfo. If the return value is equal to -1, then the routerinfo was
1354 * fine, but out-of-date. If the return value is equal to 1, the
1355 * routerinfo was accepted, but we should notify the generator of the
1356 * descriptor using the message *<b>msg</b>.
1358 * This function should be called *after*
1359 * routers_update_status_from_networkstatus; subsequenctly, you should call
1360 * router_rebuild_store and control_event_descriptors_changed.
1362 * XXXX never replace your own descriptor.
1365 router_add_to_routerlist(routerinfo_t
*router
, const char **msg
,
1369 char id_digest
[DIGEST_LEN
];
1370 int authdir
= get_options()->AuthoritativeDir
;
1371 int authdir_verified
= 0;
1376 router_get_routerlist();
1378 /* XXXX NM If this assert doesn't trigger, we should remove the id_digest
1380 crypto_pk_get_digest(router
->identity_pkey
, id_digest
);
1381 tor_assert(!memcmp(id_digest
, router
->identity_digest
, DIGEST_LEN
));
1383 /* Make sure that we haven't already got this exact descriptor. */
1384 if (digestmap_get(routerlist
->desc_digest_map
,
1385 router
->signed_descriptor_digest
)) {
1386 info(LD_DIR
, "Dropping descriptor that we already have for router '%s'",
1388 *msg
= "Router descriptor was not new.";
1393 if (authdir_wants_to_reject_router(router
, msg
))
1395 authdir_verified
= router
->is_verified
;
1398 if (! router->xx_is_recognized && !from_cache) {
1399 log_fn(LOG_WARN, "Dropping unrecognized descriptor for router '%s'",
1406 /* If we have a router with this name, and the identity key is the same,
1407 * choose the newer one. If the identity key has changed, drop the router.
1409 for (i
= 0; i
< smartlist_len(routerlist
->routers
); ++i
) {
1410 routerinfo_t
*old_router
= smartlist_get(routerlist
->routers
, i
);
1411 if (!crypto_pk_cmp_keys(router
->identity_pkey
,old_router
->identity_pkey
)) {
1412 if (router
->published_on
<= old_router
->published_on
) {
1413 /* Same key, but old */
1414 debug(LD_DIR
, "Skipping not-new descriptor for router '%s'",
1416 routerlist_insert_old(routerlist
, router
);
1417 *msg
= "Router descriptor was not new.";
1420 /* Same key, new. */
1421 int unreachable
= 0;
1422 debug(LD_DIR
, "Replacing entry for router '%s/%s' [%s]",
1423 router
->nickname
, old_router
->nickname
,
1424 hex_str(id_digest
,DIGEST_LEN
));
1425 if (router
->addr
== old_router
->addr
&&
1426 router
->or_port
== old_router
->or_port
) {
1427 /* these carry over when the address and orport are unchanged.*/
1428 router
->last_reachable
= old_router
->last_reachable
;
1429 router
->testing_since
= old_router
->testing_since
;
1430 router
->num_unreachable_notifications
=
1431 old_router
->num_unreachable_notifications
;
1434 dirserv_thinks_router_is_blatantly_unreachable(router
, time(NULL
))) {
1435 if (router
->num_unreachable_notifications
>= 3) {
1437 notice(LD_DIR
, "Notifying server '%s' that it's unreachable. (ContactInfo '%s', platform '%s').",
1438 router
->nickname
, router
->contact_info
? router
->contact_info
: "",
1439 router
->platform
? router
->platform
: "");
1441 info(LD_DIR
,"'%s' may be unreachable -- the %d previous descriptors were thought to be unreachable.", router
->nickname
, router
->num_unreachable_notifications
);
1442 router
->num_unreachable_notifications
++;
1445 routerlist_replace(routerlist
, old_router
, router
, i
, 1);
1447 router_append_to_journal(router
->signed_descriptor
,
1448 router
->signed_descriptor_len
);
1449 directory_set_dirty();
1450 *msg
= unreachable
? "Dirserver believes your ORPort is unreachable" :
1451 authdir_verified
? "Verified server updated" :
1452 "Unverified server updated. (Have you sent us your key fingerprint?)";
1453 return unreachable
? 1 : 0;
1455 } else if (!strcasecmp(router
->nickname
, old_router
->nickname
)) {
1456 /* nicknames match, keys don't. */
1457 if (router
->is_named
) {
1458 /* The new verified router replaces the old one; remove the
1459 * old one. And carry on to the end of the list, in case
1460 * there are more old unverified routers with this nickname
1462 /* mark-for-close connections using the old key, so we can
1463 * make new ones with the new key.
1466 while ((conn
= connection_get_by_identity_digest(
1467 old_router
->identity_digest
, CONN_TYPE_OR
))) {
1468 // And LD_OR? XXXXNM
1469 info(LD_DIR
,"Closing conn to router '%s'; there is now a named router with that name.",
1470 old_router
->nickname
);
1471 connection_mark_for_close(conn
);
1473 routerlist_remove(routerlist
, old_router
, i
--, 0);
1474 } else if (old_router
->is_named
) {
1475 /* Can't replace a verified router with an unverified one. */
1476 debug(LD_DIR
, "Skipping unverified entry for verified router '%s'",
1478 routerinfo_free(router
);
1479 *msg
= "Already have named router with same nickname and different key.";
1484 /* We haven't seen a router with this name before. Add it to the end of
1486 routerlist_insert(routerlist
, router
);
1488 router_append_to_journal(router
->signed_descriptor
,
1489 router
->signed_descriptor_len
);
1490 directory_set_dirty();
1494 #define MAX_DESCRIPTORS_PER_ROUTER 5
1496 /** Remove any routers from the routerlist that are more than <b>age</b>
1500 routerlist_remove_old_routers(int age
)
1504 routerinfo_t
*router
;
1508 cutoff
= time(NULL
) - age
;
1509 for (i
= 0; i
< smartlist_len(routerlist
->routers
); ++i
) {
1510 router
= smartlist_get(routerlist
->routers
, i
);
1511 if (router
->published_on
<= cutoff
) {
1512 /* Too old. Remove it. */
1513 info(LD_DIR
,"Forgetting obsolete (too old) routerinfo for router '%s'", router
->nickname
);
1514 routerlist_remove(routerlist
, router
, i
--, 1);
1521 _compare_old_routers_by_identity(const void **_a
, const void **_b
)
1524 const routerinfo_t
*r1
= *_a
, *r2
= *_b
;
1525 if ((i
= memcmp(r1
->identity_digest
, r2
->identity_digest
, DIGEST_LEN
)))
1527 return r1
->published_on
- r2
->published_on
;
1530 struct duration_idx_t
{
1537 _compare_duration_idx(const void *_d1
, const void *_d2
)
1539 const struct duration_idx_t
*d1
= _d1
;
1540 const struct duration_idx_t
*d2
= _d2
;
1541 return d1
->duration
- d2
->duration
;
1544 /** The range <b>lo</b> through <b>hi</b> inclusive of routerlist->old_routers
1545 * must contain routerinfo_t with the same identity and with publication time
1546 * in ascending order. Remove members from this range until there are no more
1547 * than MAX_DESCRIPTORS_PER_ROUTER remaining. Start by removing the oldest
1548 * members from before <b>cutoff</b>, then remove members which were current
1549 * for the lowest amount of time. The order of members of old_routers at
1550 * indices <b>lo</b> or higher may be changed.
1553 routerlist_remove_old_cached_routers_with_id(time_t cutoff
, int lo
, int hi
)
1555 int i
, n
= hi
-lo
+1, n_extra
;
1557 struct duration_idx_t
*lifespans
;
1559 smartlist_t
*lst
= routerlist
->old_routers
;
1562 tor_assert(hi
< smartlist_len(lst
));
1563 tor_assert(lo
<= hi
);
1564 ident
= ((routerinfo_t
*)smartlist_get(lst
, lo
))->identity_digest
;
1565 for (i
= lo
+1; i
<= hi
; ++i
) {
1566 routerinfo_t
*r
= smartlist_get(lst
, i
);
1567 tor_assert(!memcmp(ident
, r
->identity_digest
, DIGEST_LEN
));
1571 /* Check whether we need to do anything at all. */
1572 n_extra
= n
- MAX_DESCRIPTORS_PER_ROUTER
;
1577 lifespans
= tor_malloc_zero(sizeof(struct duration_idx_t
)*n
);
1578 rmv
= tor_malloc_zero(sizeof(uint8_t)*n
);
1579 /* Set lifespans to contain the lifespan and index of each server. */
1580 /* Set rmv[i-lo]=1 if we're going to remove a server for being too old. */
1581 for (i
= lo
; i
<= hi
; ++i
) {
1582 routerinfo_t
*r
= smartlist_get(lst
, i
);
1583 routerinfo_t
*r_next
;
1584 lifespans
[i
].idx
= i
;
1586 r_next
= smartlist_get(lst
, i
+1);
1587 tor_assert(r
->published_on
<= r_next
->published_on
);
1588 lifespans
[i
].duration
= r_next
->published_on
- r
->published_on
;
1591 lifespans
[i
].duration
= INT_MAX
;
1593 if (r
->published_on
< cutoff
&& n_rmv
< n_extra
) {
1595 lifespans
[i
].old
= 1;
1600 if (n_rmv
< n_extra
) {
1602 * We aren't removing enough servers for being old. Sort lifespans by
1603 * the duration of liveness, and remove the ones we're not already going to
1604 * remove based on how long they were alive.
1606 qsort(lifespans
, n
, sizeof(struct duration_idx_t
), _compare_duration_idx
);
1607 for (i
= 0; i
< n
&& n_rmv
< n_extra
; ++i
) {
1608 if (!lifespans
[i
].old
) {
1609 rmv
[lifespans
[i
].idx
-lo
] = 1;
1615 for (i
= hi
; i
>= lo
; ++i
) {
1617 routerlist_remove_old(routerlist
, smartlist_get(lst
, i
), i
);
1620 tor_free(lifespans
);
1624 routerlist_remove_old_cached_routers(void)
1627 const char *cur_id
= NULL
;
1632 /* First, check whether we have too many router descriptors, total. We're
1633 * okay with having too many for some given router, so long as the total
1634 * number doesn't much exceed
1636 if (smartlist_len(routerlist
->old_routers
) <
1637 smartlist_len(routerlist
->routers
) * (MAX_DESCRIPTORS_PER_ROUTER
- 1))
1640 smartlist_sort(routerlist
->old_routers
, _compare_old_routers_by_identity
);
1642 cutoff
= time(NULL
) - ROUTER_MAX_AGE
;
1644 /* Iterate through the list from back to front, so when we remove descriptors
1645 * we don't mess up groups we haven't gotten to. */
1646 for (i
= smartlist_len(routerlist
->old_routers
)-1; i
>= 0; --i
) {
1647 routerinfo_t
*r
= smartlist_get(routerlist
->old_routers
, i
);
1649 cur_id
= r
->identity_digest
;
1652 if (memcmp(cur_id
, r
->identity_digest
, DIGEST_LEN
)) {
1653 routerlist_remove_old_cached_routers_with_id(cutoff
, i
+1, hi
);
1657 routerlist_remove_old_cached_routers_with_id(cutoff
, 0, hi
);
1661 * Code to parse a single router descriptor and insert it into the
1662 * routerlist. Return -1 if the descriptor was ill-formed; 0 if the
1663 * descriptor was well-formed but could not be added; and 1 if the
1664 * descriptor was added.
1666 * If we don't add it and <b>msg</b> is not NULL, then assign to
1667 * *<b>msg</b> a static string describing the reason for refusing the
1670 * This is used only by the controller.
1673 router_load_single_router(const char *s
, const char **msg
)
1680 if (!(ri
= router_parse_entry_from_string(s
, NULL
))) {
1681 warn(LD_DIR
, "Error parsing router descriptor; dropping.");
1682 *msg
= "Couldn't parse router descriptor.";
1685 if (router_is_me(ri
)) {
1686 warn(LD_DIR
, "Router's identity key matches mine; dropping.");
1687 *msg
= "Router's identity key matches mine.";
1688 routerinfo_free(ri
);
1692 lst
= smartlist_create();
1693 smartlist_add(lst
, ri
);
1694 routers_update_status_from_networkstatus(lst
, 0, 1);
1696 if (router_add_to_routerlist(ri
, msg
, 0)<0) {
1697 warn(LD_DIR
, "Couldn't add router to list: %s Dropping.",
1698 *msg
?*msg
:"(No message).");
1699 /* we've already assigned to *msg now, and ri is already freed */
1700 smartlist_free(lst
);
1703 control_event_descriptors_changed(lst
);
1704 smartlist_free(lst
);
1705 debug(LD_DIR
, "Added router to list");
1710 /** Given a string <b>s</b> containing some routerdescs, parse it and put the
1711 * routers into our directory. If <b>from_cache</b> is false, the routers
1712 * have come from the network: cache them.
1714 * If <b>requested_fingerprints</b> is provided, it must contain a list of
1715 * uppercased identity fingerprints. Do not update any router whose
1716 * fingerprint is not on the list; after updating a router, remove its
1717 * fingerprint from the list.
1720 router_load_routers_from_string(const char *s
, int from_cache
,
1721 smartlist_t
*requested_fingerprints
)
1723 smartlist_t
*routers
= smartlist_create(), *changed
= smartlist_create();
1724 char fp
[HEX_DIGEST_LEN
+1];
1727 router_parse_list_from_string(&s
, routers
);
1729 routers_update_status_from_networkstatus(routers
, !from_cache
, from_cache
);
1731 SMARTLIST_FOREACH(routers
, routerinfo_t
*, ri
,
1733 base16_encode(fp
, sizeof(fp
), ri
->identity_digest
, DIGEST_LEN
);
1734 if (requested_fingerprints
) {
1735 if (smartlist_string_isin(requested_fingerprints
, fp
)) {
1736 smartlist_string_remove(requested_fingerprints
, fp
);
1739 smartlist_join_strings(requested_fingerprints
," ",0,NULL
);
1740 warn(LD_DIR
, "We received a router descriptor with a fingerprint (%s) that we never requested. (We asked for: %s.) Dropping.", fp
, requested
);
1741 tor_free(requested
);
1742 routerinfo_free(ri
);
1747 if (router_add_to_routerlist(ri
, &msg
, from_cache
) >= 0)
1748 smartlist_add(changed
, ri
);
1751 if (smartlist_len(changed
))
1752 control_event_descriptors_changed(changed
);
1754 routerlist_assert_ok(routerlist
);
1755 router_rebuild_store(0);
1757 smartlist_free(routers
);
1758 smartlist_free(changed
);
1761 /** Helper: return a newly allocated string containing the name of the filename
1762 * where we plan to cache <b>ns</b>. */
1764 networkstatus_get_cache_filename(const networkstatus_t
*ns
)
1766 const char *datadir
= get_options()->DataDirectory
;
1767 size_t len
= strlen(datadir
)+64;
1768 char fp
[HEX_DIGEST_LEN
+1];
1769 char *fn
= tor_malloc(len
+1);
1770 base16_encode(fp
, HEX_DIGEST_LEN
+1, ns
->identity_digest
, DIGEST_LEN
);
1771 tor_snprintf(fn
, len
, "%s/cached-status/%s",datadir
,fp
);
1775 /** Helper for smartlist_sort: Compare two networkstatus objects by
1776 * publication date. */
1778 _compare_networkstatus_published_on(const void **_a
, const void **_b
)
1780 const networkstatus_t
*a
= *_a
, *b
= *_b
;
1781 if (a
->published_on
< b
->published_on
)
1783 else if (a
->published_on
> b
->published_on
)
1789 /** How far in the future do we allow a network-status to get before removing
1791 #define NETWORKSTATUS_ALLOW_SKEW (48*60*60)
1792 /** Given a string <b>s</b> containing a network status that we received at
1793 * <b>arrived_at</b> from <b>source</b>, try to parse it, see if we want to
1794 * store it, and put it into our cache is necessary.
1796 * If <b>source</b> is NS_FROM_DIR or NS_FROM_CACHE, do not replace our
1797 * own networkstatus_t (if we're a directory server).
1799 * If <b>source</b> is NS_FROM_CACHE, do not write our networkstatus_t to the
1802 * If <b>requested_fingerprints</b> is provided, it must contain a list of
1803 * uppercased identity fingerprints. Do not update any networkstatus whose
1804 * fingerprint is not on the list; after updating a networkstatus, remove its
1805 * fingerprint from the list.
1807 * Return 0 on success, -1 on failure.
1809 * Callers should make sure that routers_update_all_from_networkstatus() is
1810 * invoked after this function succeeds.
1813 router_set_networkstatus(const char *s
, time_t arrived_at
,
1814 networkstatus_source_t source
, smartlist_t
*requested_fingerprints
)
1816 networkstatus_t
*ns
;
1820 trusted_dir_server_t
*trusted_dir
;
1821 char fp
[HEX_DIGEST_LEN
+1];
1822 char published
[ISO_TIME_LEN
+1];
1824 ns
= networkstatus_parse_from_string(s
);
1826 warn(LD_DIR
, "Couldn't parse network status.");
1829 if (!(trusted_dir
=router_get_trusteddirserver_by_digest(ns
->identity_digest
))) {
1830 info(LD_DIR
, "Network status was signed, but not by an authoritative directory we recognize.");
1831 networkstatus_free(ns
);
1835 if (arrived_at
> now
)
1838 ns
->received_on
= arrived_at
;
1840 format_iso_time(published
, ns
->published_on
);
1842 if (ns
->published_on
> now
+ NETWORKSTATUS_ALLOW_SKEW
) {
1843 warn(LD_GENERAL
, "Network status from %s was published in the future (%s GMT). Somebody is skewed here: check your clock. Not caching.", trusted_dir
->description
, published
);
1847 if (!networkstatus_list
)
1848 networkstatus_list
= smartlist_create();
1850 if (source
== NS_FROM_DIR
&& router_digest_is_me(ns
->identity_digest
)) {
1851 /* Don't replace our own networkstatus when we get it from somebody else. */
1852 networkstatus_free(ns
);
1856 base16_encode(fp
, HEX_DIGEST_LEN
+1, ns
->identity_digest
, DIGEST_LEN
);
1858 if (requested_fingerprints
) {
1859 if (smartlist_string_isin(requested_fingerprints
, fp
)) {
1860 smartlist_string_remove(requested_fingerprints
, fp
);
1862 char *requested
= smartlist_join_strings(requested_fingerprints
," ",0,NULL
);
1863 warn(LD_DIR
, "We received a network status with a fingerprint (%s) that we never requested. (We asked for: %s.) Dropping.", fp
, requested
);
1864 tor_free(requested
);
1869 if (source
!= NS_FROM_CACHE
)
1870 trusted_dir
->n_networkstatus_failures
= 0;
1873 for (i
=0; i
< smartlist_len(networkstatus_list
); ++i
) {
1874 networkstatus_t
*old_ns
= smartlist_get(networkstatus_list
, i
);
1876 if (!memcmp(old_ns
->identity_digest
, ns
->identity_digest
, DIGEST_LEN
)) {
1877 if (!memcmp(old_ns
->networkstatus_digest
,
1878 ns
->networkstatus_digest
, DIGEST_LEN
)) {
1879 /* Same one we had before. */
1880 networkstatus_free(ns
);
1882 "Not replacing network-status from %s (published %s); "
1883 "we already have it.",
1884 trusted_dir
->description
, published
);
1885 if (old_ns
->received_on
< arrived_at
) {
1886 if (source
!= NS_FROM_CACHE
) {
1887 char *fn
= networkstatus_get_cache_filename(old_ns
);
1888 /* We use mtime to tell when it arrived, so update that. */
1892 old_ns
->received_on
= arrived_at
;
1895 } else if (old_ns
->published_on
>= ns
->published_on
) {
1896 char old_published
[ISO_TIME_LEN
+1];
1897 format_iso_time(old_published
, old_ns
->published_on
);
1899 "Not replacing network-status from %s (published %s);"
1900 " we have a newer one (published %s) for this authority.",
1901 trusted_dir
->description
, published
,
1903 networkstatus_free(ns
);
1906 networkstatus_free(old_ns
);
1907 smartlist_set(networkstatus_list
, i
, ns
);
1915 smartlist_add(networkstatus_list
, ns
);
1917 info(LD_DIR
, "Setting networkstatus %s %s (published %s)",
1918 source
== NS_FROM_CACHE
?"cached from":
1919 (source
==NS_FROM_DIR
?"downloaded from":"generated for"),
1920 trusted_dir
->description
, published
);
1921 networkstatus_list_has_changed
= 1;
1923 smartlist_sort(networkstatus_list
, _compare_networkstatus_published_on
);
1925 if (source
!= NS_FROM_CACHE
&& !skewed
) {
1926 char *fn
= networkstatus_get_cache_filename(ns
);
1927 if (write_str_to_file(fn
, s
, 0)<0) {
1928 notice(LD_FS
, "Couldn't write cached network status to \"%s\"", fn
);
1933 networkstatus_list_update_recent(now
);
1935 if (get_options()->DirPort
&& !skewed
)
1936 dirserv_set_cached_networkstatus_v2(s
,
1937 ns
->identity_digest
,
1943 /** How old do we allow a network-status to get before removing it completely? */
1944 #define MAX_NETWORKSTATUS_AGE (10*24*60*60)
1945 /** Remove all very-old network_status_t objects from memory and from the
1948 networkstatus_list_clean(time_t now
)
1951 if (!networkstatus_list
)
1954 for (i
= 0; i
< smartlist_len(networkstatus_list
); ++i
) {
1955 networkstatus_t
*ns
= smartlist_get(networkstatus_list
, i
);
1956 char *fname
= NULL
;;
1957 if (ns
->published_on
+ MAX_NETWORKSTATUS_AGE
> now
)
1959 /* Okay, this one is too old. Remove it from the list, and delete it
1960 * from the cache. */
1961 smartlist_del(networkstatus_list
, i
--);
1962 fname
= networkstatus_get_cache_filename(ns
);
1963 if (file_status(fname
) == FN_FILE
) {
1964 info(LD_DIR
, "Removing too-old networkstatus in %s", fname
);
1968 if (get_options()->DirPort
) {
1969 dirserv_set_cached_networkstatus_v2(NULL
, ns
->identity_digest
, 0);
1971 networkstatus_free(ns
);
1975 /** Helper for bsearching a list of routerstatus_t pointers.*/
1977 _compare_digest_to_routerstatus_entry(const void *_key
, const void **_member
)
1979 const char *key
= _key
;
1980 const routerstatus_t
*rs
= *_member
;
1981 return memcmp(key
, rs
->identity_digest
, DIGEST_LEN
);
1984 /** Return the entry in <b>ns</b> for the identity digest <b>digest</b>, or
1985 * NULL if none was found. */
1986 static routerstatus_t
*
1987 networkstatus_find_entry(networkstatus_t
*ns
, const char *digest
)
1989 return smartlist_bsearch(ns
->entries
, digest
,
1990 _compare_digest_to_routerstatus_entry
);
1993 /** Return the consensus view of the status of the router whose digest is
1994 * <b>digest</b>, or NULL if we don't know about any such router. */
1995 local_routerstatus_t
*
1996 router_get_combined_status_by_digest(const char *digest
)
1998 if (!routerstatus_list
)
2000 return smartlist_bsearch(routerstatus_list
, digest
,
2001 _compare_digest_to_routerstatus_entry
);
2006 routerdesc_digest_is_recognized(const char *identity
, const char *digest
)
2009 if (!networkstatus_list
)
2012 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
2014 if (!(rs
= networkstatus_find_entry(ns
, identity
)))
2016 if (!memcmp(rs
->descriptor_digest
, digest
, DIGEST_LEN
))
2022 /* XXXX These should be configurable, perhaps? NM */
2023 #define AUTHORITY_NS_CACHE_INTERVAL 10*60
2024 #define NONAUTHORITY_NS_CACHE_INTERVAL 15*60
2025 /** We are a directory server, and so cache network_status documents.
2026 * Initiate downloads as needed to update them. For authorities, this means
2027 * asking each trusted directory for its network-status. For caches, this
2028 * means asking a random authority for all network-statuses.
2031 update_networkstatus_cache_downloads(time_t now
)
2033 int authority
= authdir_mode(get_options());
2035 authority
? AUTHORITY_NS_CACHE_INTERVAL
: NONAUTHORITY_NS_CACHE_INTERVAL
;
2037 if (last_networkstatus_download_attempted
+ interval
>= now
)
2039 if (!trusted_dir_servers
)
2042 last_networkstatus_download_attempted
= now
;
2045 /* An authority launches a separate connection for everybody. */
2046 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ds
,
2048 char resource
[HEX_DIGEST_LEN
+6];
2049 if (router_digest_is_me(ds
->digest
))
2051 if (connection_get_by_type_addr_port_purpose(
2052 CONN_TYPE_DIR
, ds
->addr
, ds
->dir_port
,
2053 DIR_PURPOSE_FETCH_NETWORKSTATUS
)) {
2054 /* We are already fetching this one. */
2057 strlcpy(resource
, "fp/", sizeof(resource
));
2058 base16_encode(resource
+3, sizeof(resource
)-3, ds
->digest
, DIGEST_LEN
);
2059 strlcat(resource
, ".z", sizeof(resource
));
2060 directory_get_from_dirserver(DIR_PURPOSE_FETCH_NETWORKSTATUS
,resource
,1);
2063 /* A non-authority cache launches one connection to a random authority. */
2064 /* (Check whether we're currently fetching network-status objects.) */
2065 if (!connection_get_by_type_purpose(CONN_TYPE_DIR
,
2066 DIR_PURPOSE_FETCH_NETWORKSTATUS
))
2067 directory_get_from_dirserver(DIR_PURPOSE_FETCH_NETWORKSTATUS
,"all.z",1);
2071 /*XXXX Should these be configurable? NM*/
2072 /** How old (in seconds) can a network-status be before we try replacing it? */
2073 #define NETWORKSTATUS_MAX_VALIDITY (48*60*60)
2074 /** How long (in seconds) does a client wait after getting a network status
2075 * before downloading the next in sequence? */
2076 #define NETWORKSTATUS_CLIENT_DL_INTERVAL (30*60)
2077 /* How many times do we allow a networkstatus download to fail before we
2078 * assume that the authority isn't publishing? */
2079 #define NETWORKSTATUS_N_ALLOWABLE_FAILURES 3
2080 /** We are not a directory cache or authority. Update our network-status list
2081 * by launching a new directory fetch for enough network-status documents "as
2082 * necessary". See function comments for implementation details.
2085 update_networkstatus_client_downloads(time_t now
)
2087 int n_live
= 0, needed
= 0, n_running_dirservers
, n_dirservers
, i
;
2088 int most_recent_idx
= -1;
2089 trusted_dir_server_t
*most_recent
= NULL
;
2090 time_t most_recent_received
= 0;
2091 char *resource
, *cp
;
2092 size_t resource_len
;
2094 if (connection_get_by_type_purpose(CONN_TYPE_DIR
,
2095 DIR_PURPOSE_FETCH_NETWORKSTATUS
))
2098 /* This is a little tricky. We want to download enough network-status
2099 * objects so that we have at least half of them under
2100 * NETWORKSTATUS_MAX_VALIDITY publication time. We want to download a new
2101 * *one* if the most recent one's publication time is under
2102 * NETWORKSTATUS_CLIENT_DL_INTERVAL.
2104 if (!trusted_dir_servers
|| !smartlist_len(trusted_dir_servers
))
2106 n_dirservers
= n_running_dirservers
= smartlist_len(trusted_dir_servers
);
2107 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ds
,
2109 networkstatus_t
*ns
= networkstatus_get_by_digest(ds
->digest
);
2112 if (ds
->n_networkstatus_failures
> NETWORKSTATUS_N_ALLOWABLE_FAILURES
) {
2113 --n_running_dirservers
;
2116 if (ns
->published_on
> now
-NETWORKSTATUS_MAX_VALIDITY
)
2118 if (!most_recent
|| ns
->received_on
> most_recent_received
) {
2119 most_recent_idx
= ds_sl_idx
; /* magic variable from FOREACH */
2121 most_recent_received
= ns
->received_on
;
2125 /* Download enough so we have at least half live, but no more than all the
2126 * trusted dirservers we know.
2128 if (n_live
< (n_dirservers
/2)+1)
2129 needed
= (n_dirservers
/2)+1-n_live
;
2130 if (needed
> n_running_dirservers
)
2131 needed
= n_running_dirservers
;
2134 info(LD_DIR
, "For %d/%d running directory servers, we have %d live"
2135 " network-status documents. Downloading %d.",
2136 n_running_dirservers
, n_dirservers
, n_live
, needed
);
2138 /* Also, download at least 1 every NETWORKSTATUS_CLIENT_DL_INTERVAL. */
2139 if (n_running_dirservers
&&
2140 most_recent_received
< now
-NETWORKSTATUS_CLIENT_DL_INTERVAL
&& needed
< 1) {
2141 info(LD_DIR
, "Our most recent network-status document (from %s) "
2142 "is %d seconds old; downloading another.",
2143 most_recent
?most_recent
->description
:"nobody",
2144 (int)(now
-most_recent_received
));
2151 /* If no networkstatus was found, choose a dirserver at random as "most
2153 if (most_recent_idx
<0)
2154 most_recent_idx
= crypto_rand_int(n_dirservers
);
2156 /* Build a request string for all the resources we want. */
2157 resource_len
= needed
* (HEX_DIGEST_LEN
+1) + 6;
2158 resource
= tor_malloc(resource_len
);
2159 memcpy(resource
, "fp/", 3);
2161 for (i
= most_recent_idx
+1; needed
; ++i
) {
2162 trusted_dir_server_t
*ds
;
2163 if (i
>= n_dirservers
)
2165 ds
= smartlist_get(trusted_dir_servers
, i
);
2166 if (ds
->n_networkstatus_failures
> NETWORKSTATUS_N_ALLOWABLE_FAILURES
)
2168 base16_encode(cp
, HEX_DIGEST_LEN
+1, ds
->digest
, DIGEST_LEN
);
2169 cp
+= HEX_DIGEST_LEN
;
2174 memcpy(cp
, ".z", 3);
2175 directory_get_from_dirserver(DIR_PURPOSE_FETCH_NETWORKSTATUS
, resource
, 1);
2181 update_networkstatus_downloads(time_t now
)
2183 or_options_t
*options
= get_options();
2184 if (server_mode(options
) && options
->DirPort
)
2185 update_networkstatus_cache_downloads(time(NULL
));
2187 update_networkstatus_client_downloads(time(NULL
));
2190 /** Decide whether a given addr:port is definitely accepted,
2191 * definitely rejected, probably accepted, or probably rejected by a
2192 * given policy. If <b>addr</b> is 0, we don't know the IP of the
2193 * target address. If <b>port</b> is 0, we don't know the port of the
2196 * For now, the algorithm is pretty simple: we look for definite and
2197 * uncertain matches. The first definite match is what we guess; if
2198 * it was preceded by no uncertain matches of the opposite policy,
2199 * then the guess is definite; otherwise it is probable. (If we
2200 * have a known addr and port, all matches are definite; if we have an
2201 * unknown addr/port, any address/port ranges other than "all" are
2204 * We could do better by assuming that some ranges never match typical
2205 * addresses (127.0.0.1, and so on). But we'll try this for now.
2207 addr_policy_result_t
2208 router_compare_addr_to_addr_policy(uint32_t addr
, uint16_t port
,
2209 addr_policy_t
*policy
)
2211 int maybe_reject
= 0;
2212 int maybe_accept
= 0;
2215 addr_policy_t
*tmpe
;
2217 for (tmpe
=policy
; tmpe
; tmpe
=tmpe
->next
) {
2220 /* Address is unknown. */
2221 if ((port
>= tmpe
->prt_min
&& port
<= tmpe
->prt_max
) ||
2222 (!port
&& tmpe
->prt_min
<=1 && tmpe
->prt_max
>=65535)) {
2223 /* The port definitely matches. */
2224 if (tmpe
->msk
== 0) {
2230 /* The port maybe matches. */
2234 /* Address is known */
2235 if ((addr
& tmpe
->msk
) == (tmpe
->addr
& tmpe
->msk
)) {
2236 if (port
>= tmpe
->prt_min
&& port
<= tmpe
->prt_max
) {
2237 /* Exact match for the policy */
2245 if (tmpe
->policy_type
== ADDR_POLICY_REJECT
)
2251 if (tmpe
->policy_type
== ADDR_POLICY_ACCEPT
) {
2252 /* If we already hit a clause that might trigger a 'reject', than we
2253 * can't be sure of this certain 'accept'.*/
2254 return maybe_reject
? ADDR_POLICY_PROBABLY_ACCEPTED
: ADDR_POLICY_ACCEPTED
;
2256 return maybe_accept
? ADDR_POLICY_PROBABLY_REJECTED
: ADDR_POLICY_REJECTED
;
2260 /* accept all by default. */
2261 return maybe_reject
? ADDR_POLICY_PROBABLY_ACCEPTED
: ADDR_POLICY_ACCEPTED
;
2264 /** Return 1 if all running sufficiently-stable routers will reject
2265 * addr:port, return 0 if any might accept it. */
2267 router_exit_policy_all_routers_reject(uint32_t addr
, uint16_t port
,
2270 addr_policy_result_t r
;
2271 if (!routerlist
) return 1;
2273 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, router
,
2275 if (router
->is_running
&&
2276 !router_is_unreliable(router
, need_uptime
, 0)) {
2277 r
= router_compare_addr_to_addr_policy(addr
, port
, router
->exit_policy
);
2278 if (r
!= ADDR_POLICY_REJECTED
&& r
!= ADDR_POLICY_PROBABLY_REJECTED
)
2279 return 0; /* this one could be ok. good enough. */
2282 return 1; /* all will reject. */
2286 * If <b>policy</b> implicitly allows connections to any port in the
2287 * IP set <b>addr</b>/<b>mask</b>, then set *<b>policy_out</b> to the
2288 * part of the policy that allows it, and return 1. Else return 0.
2290 * A policy allows an IP:Port combination <em>implicitly</em> if
2291 * it is included in a *: pattern, or in a fallback pattern.
2294 policy_includes_addr_mask_implicitly(addr_policy_t
*policy
,
2295 uint32_t addr
, uint32_t mask
,
2296 addr_policy_t
**policy_out
)
2299 tor_assert(policy_out
);
2301 addr2
= addr
| ~mask
;
2302 for (; policy
; policy
=policy
->next
) {
2303 /* Does this policy cover all of the address range we're looking at? */
2304 /* Boolean logic time: range X is contained in range Y if, for
2305 * each bit B, all possible values of B in X are values of B in Y.
2306 * In "addr", we have every fixed bit set to its value, and every
2307 * free bit set to 0. In "addr2", we have every fixed bit set to
2308 * its value, and every free bit set to 1. So if addr and addr2 are
2309 * both in the policy, the range is covered by the policy.
2311 uint32_t p_addr
= policy
->addr
& policy
->msk
;
2312 if (p_addr
== (addr
& policy
->msk
) &&
2313 p_addr
== (addr2
& policy
->msk
) &&
2314 (policy
->prt_min
<= 1 && policy
->prt_max
== 65535)) {
2317 /* Does this policy cover some of the address range we're looking at? */
2318 /* Boolean logic time: range X and range Y intersect if there is
2319 * some z such that z & Xmask == Xaddr and z & Ymask == Yaddr.
2320 * This is FALSE iff there is some bit b where Xmask == yMask == 1
2321 * and Xaddr != Yaddr. So if X intersects with Y iff at every
2322 * place where Xmask&Ymask==1, Xaddr == Yaddr, or equivalently,
2323 * Xaddr&Xmask&Ymask == Yaddr&Xmask&Ymask.
2325 if ((policy
->addr
& policy
->msk
& mask
) == (addr
& policy
->msk
) &&
2326 policy
->policy_type
== ADDR_POLICY_ACCEPT
) {
2327 *policy_out
= policy
;
2335 /** If <b>policy</b> implicitly allows connections to any port on
2336 * 127.*, 192.168.*, etc, then warn (if <b>warn</b> is set) and return
2337 * true. Else return false.
2340 exit_policy_implicitly_allows_local_networks(addr_policy_t
*policy
,
2346 uint32_t addr
; uint32_t mask
; const char *network
;
2347 } private_networks
[] = {
2348 { 0x7f000000, 0xff000000, "localhost (127.0.0.0/8)" },
2349 { 0x0a000000, 0xff000000, "addresses in private network 10.0.0.0/8" },
2350 { 0xa9fe0000, 0xffff0000, "addresses in private network 169.254.0.0/16" },
2351 { 0xac100000, 0xfff00000, "addresses in private network 172.16.0.0/12" },
2352 { 0xc0a80000, 0xffff0000, "addresses in private network 192.168.0.0/16" },
2355 for (i
=0; private_networks
[i
].addr
; ++i
) {
2357 /* log_fn(LOG_INFO,"Checking network %s", private_networks[i].network); */
2358 if (policy_includes_addr_mask_implicitly(
2359 policy
, private_networks
[i
].addr
, private_networks
[i
].mask
, &p
)) {
2361 warn(LD_CONFIG
, "Exit policy %s implicitly accepts %s",
2362 p
?p
->string
:"(default)",
2363 private_networks
[i
].network
);
2371 /** Return true iff <b>router</b> does not permit exit streams.
2374 router_exit_policy_rejects_all(routerinfo_t
*router
)
2376 return router_compare_addr_to_addr_policy(0, 0, router
->exit_policy
)
2377 == ADDR_POLICY_REJECTED
;
2380 /** Add to the list of authorized directory servers one at
2381 * <b>address</b>:<b>port</b>, with identity key <b>digest</b>. If
2382 * <b>address</b> is NULL, add ourself. */
2384 add_trusted_dir_server(const char *nickname
, const char *address
,
2385 uint16_t port
, const char *digest
, int supports_v1
)
2387 trusted_dir_server_t
*ent
;
2389 char *hostname
= NULL
;
2391 if (!trusted_dir_servers
)
2392 trusted_dir_servers
= smartlist_create();
2394 if (!address
) { /* The address is us; we should guess. */
2395 if (resolve_my_address(get_options(), &a
, &hostname
) < 0) {
2396 warn(LD_CONFIG
, "Couldn't find a suitable address when adding ourself as a trusted directory server.");
2400 if (tor_lookup_hostname(address
, &a
)) {
2401 warn(LD_CONFIG
, "Unable to lookup address for directory server at %s",
2405 hostname
= tor_strdup(address
);
2409 ent
= tor_malloc_zero(sizeof(trusted_dir_server_t
));
2410 ent
->nickname
= nickname
? tor_strdup(nickname
) : NULL
;
2411 ent
->address
= hostname
;
2413 ent
->dir_port
= port
;
2414 ent
->is_running
= 1;
2415 ent
->supports_v1_protocol
= supports_v1
;
2416 memcpy(ent
->digest
, digest
, DIGEST_LEN
);
2418 dlen
= 64 + strlen(hostname
) + (nickname
?strlen(nickname
):0);
2419 ent
->description
= tor_malloc(dlen
);
2421 tor_snprintf(ent
->description
, dlen
, "directory server \"%s\" at %s:%d",
2422 nickname
, hostname
, (int)port
);
2424 tor_snprintf(ent
->description
, dlen
, "directory server at %s:%d",
2425 hostname
, (int)port
);
2427 smartlist_add(trusted_dir_servers
, ent
);
2430 /** Free storage held in <b>ds</b> */
2432 trusted_dir_server_free(trusted_dir_server_t
*ds
)
2434 tor_free(ds
->nickname
);
2435 tor_free(ds
->description
);
2436 tor_free(ds
->address
);
2440 /** Remove all members from the list of trusted dir servers. */
2442 clear_trusted_dir_servers(void)
2444 if (trusted_dir_servers
) {
2445 SMARTLIST_FOREACH(trusted_dir_servers
, trusted_dir_server_t
*, ent
,
2446 trusted_dir_server_free(ent
));
2447 smartlist_clear(trusted_dir_servers
);
2449 trusted_dir_servers
= smartlist_create();
2453 /** Return the network status with a given identity digest. */
2455 networkstatus_get_by_digest(const char *digest
)
2457 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
2459 if (!memcmp(ns
->identity_digest
, digest
, DIGEST_LEN
))
2465 /** If the network-status list has changed since the last time we called this
2466 * function, update the status of every router from the network-status list.
2469 routers_update_all_from_networkstatus(void)
2471 #define SELF_OPINION_INTERVAL 90*60
2474 if (!routerlist
|| !networkstatus_list
||
2475 (!networkstatus_list_has_changed
&& !routerstatus_list_has_changed
))
2479 if (networkstatus_list_has_changed
)
2480 routerstatus_list_update_from_networkstatus(now
);
2482 routers_update_status_from_networkstatus(routerlist
->routers
, 0, 0);
2484 me
= router_get_my_routerinfo();
2485 if (me
&& !have_warned_about_unverified_status
) {
2486 int n_recent
= 0, n_listing
= 0, n_valid
= 0, n_named
= 0;
2488 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
2490 if (ns
->received_on
+ SELF_OPINION_INTERVAL
< now
)
2493 if (!(rs
= networkstatus_find_entry(ns
, me
->identity_digest
)))
2502 if (n_recent
>= 2 && n_listing
>= 2) {
2503 if (n_valid
<= n_recent
/2) {
2504 warn(LD_GENERAL
, "%d/%d recent directory servers list us as invalid. Please consider sending your identity fingerprint to the tor-ops.",
2505 n_recent
-n_valid
, n_recent
);
2506 have_warned_about_unverified_status
= 1;
2507 } else if (n_named
<= n_recent
/2) {
2508 warn(LD_GENERAL
, "%d/%d recent directory servers list us as unnamed. Please consider sending your identity fingerprint to the tor-ops.",
2509 n_recent
-n_valid
, n_recent
);
2510 have_warned_about_unverified_status
= 1;
2515 helper_nodes_set_status_from_directory();
2517 if (!have_warned_about_old_version
) {
2519 int n_recommended
= 0;
2520 int is_server
= server_mode(get_options());
2521 version_status_t consensus
= VS_RECOMMENDED
;
2522 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
2524 version_status_t vs
;
2525 if (!ns
->recommends_versions
||
2526 ns
->received_on
+ SELF_OPINION_INTERVAL
< now
)
2528 vs
= tor_version_is_obsolete(
2529 VERSION
, is_server
? ns
->server_versions
: ns
->client_versions
);
2530 if (vs
== VS_RECOMMENDED
)
2532 if (n_recent
++ == 0) {
2534 } else if (consensus
!= vs
) {
2535 consensus
= version_status_join(consensus
, vs
);
2538 if (n_recent
> 2 && n_recommended
< n_recent
/2) {
2539 if (consensus
== VS_NEW
|| consensus
== VS_NEW_IN_SERIES
) {
2540 if (!have_warned_about_new_version
) {
2541 notice(LD_GENERAL
, "This version of Tor (%s) is newer than any recommended version%s, according to %d/%d recent network statuses.",
2542 VERSION
, consensus
== VS_NEW_IN_SERIES
? " in its series" : "",
2543 n_recent
-n_recommended
, n_recent
);
2544 have_warned_about_new_version
= 1;
2547 notice(LD_GENERAL
, "This version of Tor (%s) is %s, according to %d/%d recent network statuses.",
2548 VERSION
, consensus
== VS_OLD
? "obsolete" : "not recommended",
2549 n_recent
-n_recommended
, n_recent
);
2550 have_warned_about_old_version
= 1;
2553 info(LD_GENERAL
, "%d/%d recent directories think my version is ok.",
2554 n_recommended
, n_recent
);
2558 routerstatus_list_has_changed
= 0;
2561 /** Allow any network-status newer than this to influence our view of who's
2563 #define DEFAULT_RUNNING_INTERVAL 60*60
2564 /** If possible, always allow at least this many network-statuses to influence
2565 * our view of who's running. */
2566 #define MIN_TO_INFLUENCE_RUNNING 3
2568 /** Change the is_recent field of each member of networkstatus_list so that
2569 * all members more recent than DEFAULT_RUNNING_INTERVAL are recent, and
2570 * at least the MIN_TO_INFLUENCE_RUNNING most recent members are resent, and no
2571 * others are recent. Set networkstatus_list_has_changed if anything happeed.
2574 networkstatus_list_update_recent(time_t now
)
2576 int n_statuses
, n_recent
, changed
, i
;
2577 char published
[ISO_TIME_LEN
+1];
2579 if (!networkstatus_list
)
2582 n_statuses
= smartlist_len(networkstatus_list
);
2585 for (i
=n_statuses
-1; i
>= 0; --i
) {
2586 networkstatus_t
*ns
= smartlist_get(networkstatus_list
, i
);
2587 trusted_dir_server_t
*ds
=
2588 router_get_trusteddirserver_by_digest(ns
->identity_digest
);
2589 const char *src
= ds
?ds
->description
:ns
->source_address
;
2590 if (n_recent
< MIN_TO_INFLUENCE_RUNNING
||
2591 ns
->published_on
+ DEFAULT_RUNNING_INTERVAL
> now
) {
2592 if (!ns
->is_recent
) {
2593 format_iso_time(published
, ns
->published_on
);
2595 "Networkstatus from %s (published %s) is now \"recent\"",
2602 if (ns
->is_recent
) {
2603 format_iso_time(published
, ns
->published_on
);
2605 "Networkstatus from %s (published %s) is no longer \"recent\"",
2613 networkstatus_list_has_changed
= 1;
2616 /** Update our view of router status (as stored in routerstatus_list) from
2617 * the current set of network status documents (as stored in networkstatus_list).
2618 * Do nothing unless the network status list has changed since the last time
2619 * this function was called.
2622 routerstatus_list_update_from_networkstatus(time_t now
)
2624 or_options_t
*options
= get_options();
2625 int n_trusted
, n_statuses
, n_recent
=0, n_naming
=0;
2629 networkstatus_t
**networkstatus
;
2630 smartlist_t
*result
;
2632 char conflict
[DIGEST_LEN
];
2634 networkstatus_list_update_recent(now
);
2636 if (!networkstatus_list_has_changed
)
2638 if (!networkstatus_list
)
2639 networkstatus_list
= smartlist_create();
2640 if (!routerstatus_list
)
2641 routerstatus_list
= smartlist_create();
2642 if (!trusted_dir_servers
)
2643 trusted_dir_servers
= smartlist_create();
2644 if (!warned_conflicts
)
2645 warned_conflicts
= smartlist_create();
2647 n_trusted
= smartlist_len(trusted_dir_servers
);
2648 n_statuses
= smartlist_len(networkstatus_list
);
2650 if (n_statuses
< (n_trusted
/2)+1) {
2651 /* Not enough statuses to adjust status. */
2652 notice(LD_DIR
,"Not enough statuses to update router status list. (%d/%d)",
2653 n_statuses
, n_trusted
);
2657 info(LD_DIR
, "Rebuilding router status list.");
2659 index
= tor_malloc(sizeof(int)*n_statuses
);
2660 size
= tor_malloc(sizeof(int)*n_statuses
);
2661 networkstatus
= tor_malloc(sizeof(networkstatus_t
*)*n_statuses
);
2662 for (i
= 0; i
< n_statuses
; ++i
) {
2664 networkstatus
[i
] = smartlist_get(networkstatus_list
, i
);
2665 size
[i
] = smartlist_len(networkstatus
[i
]->entries
);
2666 if (networkstatus
[i
]->binds_names
)
2668 if (networkstatus
[i
]->is_recent
)
2672 name_map
= strmap_new();
2673 memset(conflict
, 0xff, sizeof(conflict
));
2674 for (i
= 0; i
< n_statuses
; ++i
) {
2675 if (!networkstatus
[i
]->binds_names
)
2677 SMARTLIST_FOREACH(networkstatus
[i
]->entries
, routerstatus_t
*, rs
,
2679 const char *other_digest
;
2682 other_digest
= strmap_get_lc(name_map
, rs
->nickname
);
2683 warned
= smartlist_string_isin(warned_conflicts
, rs
->nickname
);
2684 if (!other_digest
) {
2685 strmap_set_lc(name_map
, rs
->nickname
, rs
->identity_digest
);
2687 smartlist_string_remove(warned_conflicts
, rs
->nickname
);
2688 } else if (memcmp(other_digest
, rs
->identity_digest
, DIGEST_LEN
) &&
2689 other_digest
!= conflict
) {
2691 int should_warn
= options
->DirPort
&& options
->AuthoritativeDir
;
2692 char fp1
[HEX_DIGEST_LEN
+1];
2693 char fp2
[HEX_DIGEST_LEN
+1];
2694 base16_encode(fp1
, sizeof(fp1
), other_digest
, DIGEST_LEN
);
2695 base16_encode(fp2
, sizeof(fp2
), rs
->identity_digest
, DIGEST_LEN
);
2696 log_fn(should_warn
? LOG_WARN
: LOG_INFO
, LD_DIR
,
2697 "Naming authorities disagree about which key goes with %s. ($%s vs $%s)",
2698 rs
->nickname
, fp1
, fp2
);
2699 strmap_set_lc(name_map
, rs
->nickname
, conflict
);
2700 smartlist_add(warned_conflicts
, tor_strdup(rs
->nickname
));
2704 smartlist_string_remove(warned_conflicts
, rs
->nickname
);
2709 result
= smartlist_create();
2711 /* Iterate through all of the sorted routerstatus lists in step.
2713 * - For 0 <= i < n_statuses: index[i] is an index into
2714 * networkstatus[i]->entries, which has size[i] elements.
2715 * - For i1, i2, j such that 0 <= i1 < n_statuses, 0 <= i2 < n_statues, 0 <=
2716 * j < index[i1], networkstatus[i1]->entries[j]->identity_digest <
2717 * networkstatus[i2]->entries[index[i2]]->identity_digest.
2719 * (That is, the indices are always advanced past lower digest before
2723 int n_running
=0, n_named
=0, n_valid
=0, n_listing
=0;
2724 const char *the_name
= NULL
;
2725 local_routerstatus_t
*rs_out
, *rs_old
;
2726 routerstatus_t
*rs
, *most_recent
;
2727 networkstatus_t
*ns
;
2728 const char *lowest
= NULL
;
2729 /* Find out which of the digests appears first. */
2730 for (i
= 0; i
< n_statuses
; ++i
) {
2731 if (index
[i
] < size
[i
]) {
2732 rs
= smartlist_get(networkstatus
[i
]->entries
, index
[i
]);
2733 if (!lowest
|| memcmp(rs
->identity_digest
, lowest
, DIGEST_LEN
)<0)
2734 lowest
= rs
->identity_digest
;
2738 /* We're out of routers. Great! */
2741 /* Okay. The routers at networkstatus[i]->entries[index[i]] whose digests
2742 * match "lowest" are next in order. Iterate over them, incrementing those
2743 * index[i] as we go. */
2746 for (i
= 0; i
< n_statuses
; ++i
) {
2747 if (index
[i
] >= size
[i
])
2749 ns
= networkstatus
[i
];
2750 rs
= smartlist_get(ns
->entries
, index
[i
]);
2751 if (memcmp(rs
->identity_digest
, lowest
, DIGEST_LEN
))
2755 if (!most_recent
|| rs
->published_on
> most_recent
->published_on
)
2757 if (rs
->is_named
&& ns
->binds_names
) {
2759 the_name
= rs
->nickname
;
2760 if (!strcasecmp(rs
->nickname
, the_name
)) {
2762 } else if (strcmp(the_name
,"**mismatch**")) {
2763 char hd
[HEX_DIGEST_LEN
+1];
2764 base16_encode(hd
, HEX_DIGEST_LEN
+1, rs
->identity_digest
, DIGEST_LEN
);
2765 if (! smartlist_string_isin(warned_conflicts
, hd
)) {
2766 warn(LD_DIR
, "Naming authorities disagree about nicknames for $%s (\"%s\" vs \"%s\")",
2767 hd
, the_name
, rs
->nickname
);
2768 smartlist_add(warned_conflicts
, tor_strdup(hd
));
2770 the_name
= "**mismatch**";
2775 if (rs
->is_running
&& ns
->is_recent
)
2778 rs_out
= tor_malloc_zero(sizeof(local_routerstatus_t
));
2779 memcpy(&rs_out
->status
, most_recent
, sizeof(routerstatus_t
));
2780 if ((rs_old
= router_get_combined_status_by_digest(lowest
))) {
2781 rs_out
->n_download_failures
= rs_old
->n_download_failures
;
2782 rs_out
->next_attempt_at
= rs_old
->next_attempt_at
;
2783 rs_out
->name_lookup_warned
= rs_old
->name_lookup_warned
;
2785 smartlist_add(result
, rs_out
);
2786 debug(LD_DIR
, "Router '%s' is listed by %d/%d directories, "
2787 "named by %d/%d, validated by %d/%d, and %d/%d recent directories "
2788 "think it's running.",
2789 rs_out
->status
.nickname
,
2790 n_listing
, n_statuses
, n_named
, n_naming
, n_valid
, n_statuses
,
2791 n_running
, n_recent
);
2792 rs_out
->status
.is_named
= 0;
2793 if (the_name
&& strcmp(the_name
, "**mismatch**") && n_named
> 0) {
2794 const char *d
= strmap_get_lc(name_map
, the_name
);
2795 if (d
&& d
!= conflict
)
2796 rs_out
->status
.is_named
= 1;
2797 if (smartlist_string_isin(warned_conflicts
, rs_out
->status
.nickname
))
2798 smartlist_string_remove(warned_conflicts
, rs_out
->status
.nickname
);
2800 if (rs_out
->status
.is_named
)
2801 strlcpy(rs_out
->status
.nickname
, the_name
, sizeof(rs_out
->status
.nickname
));
2802 rs_out
->status
.is_valid
= n_valid
> n_statuses
/2;
2803 rs_out
->status
.is_running
= n_running
> n_recent
/2;
2805 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
2806 local_routerstatus_free(rs
));
2807 smartlist_free(routerstatus_list
);
2808 routerstatus_list
= result
;
2810 tor_free(networkstatus
);
2813 strmap_free(name_map
, NULL
);
2815 networkstatus_list_has_changed
= 0;
2816 routerstatus_list_has_changed
= 1;
2819 /** Given a list <b>routers</b> of routerinfo_t *, update each routers's
2820 * is_named, is_verified, and is_running fields according to our current
2821 * networkstatus_t documents. */
2823 routers_update_status_from_networkstatus(smartlist_t
*routers
, int reset_failures
, int assume_recognized
)
2825 trusted_dir_server_t
*ds
;
2826 local_routerstatus_t
*rs
;
2827 or_options_t
*options
= get_options();
2828 int authdir
= options
->AuthoritativeDir
;
2829 int namingdir
= options
->AuthoritativeDir
&&
2830 options
->NamingAuthoritativeDir
;
2832 if (!routerstatus_list
)
2835 SMARTLIST_FOREACH(routers
, routerinfo_t
*, router
,
2837 rs
= router_get_combined_status_by_digest(router
->identity_digest
);
2838 ds
= router_get_trusteddirserver_by_digest(router
->identity_digest
);
2844 router
->is_named
= rs
->status
.is_named
;
2847 /* If we're an authdir, don't believe others. */
2848 router
->is_verified
= rs
->status
.is_valid
;
2849 router
->is_running
= rs
->status
.is_running
;
2851 if (router
->is_running
&& ds
) {
2852 ds
->n_networkstatus_failures
= 0;
2854 if (assume_recognized
) {
2855 router
->xx_is_recognized
= 1;
2857 if (!router
->xx_is_recognized
) {
2858 router
->xx_is_recognized
= routerdesc_digest_is_recognized(
2859 router
->identity_digest
, router
->signed_descriptor_digest
);
2861 router
->xx_is_extra_new
= router
->published_on
> rs
->status
.published_on
;
2863 if (reset_failures
&& router
->xx_is_recognized
) {
2864 rs
->n_download_failures
= 0;
2865 rs
->next_attempt_at
= 0;
2870 /** Return new list of ID fingerprints for superseded routers. A router is
2871 * superseded if any network-status has a router with a different digest
2872 * published more recently, or if it is listed in the network-status but not
2873 * in the router list.
2875 static smartlist_t
*
2876 router_list_downloadable(void)
2878 #define MAX_OLD_SERVER_DOWNLOAD_RATE 2*60*60
2879 int n_conns
, i
, n_downloadable
= 0;
2880 connection_t
**carray
;
2881 smartlist_t
*superseded
= smartlist_create();
2882 smartlist_t
*downloading
;
2883 time_t now
= time(NULL
);
2884 int mirror
= server_mode(get_options()) && get_options()->DirPort
;
2885 /* these are just used for logging */
2886 int n_not_ready
= 0, n_in_progress
= 0, n_uptodate
= 0, n_skip_old
= 0,
2887 n_obsolete
= 0, xx_n_unrecognized
= 0, xx_n_extra_new
= 0, xx_n_both
= 0,
2890 if (!routerstatus_list
)
2893 get_connection_array(&carray
, &n_conns
);
2895 routerstatus_list_update_from_networkstatus(now
);
2897 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
2899 if (rs
->status
.published_on
+ ROUTER_MAX_AGE
< now
) {
2900 rs
->should_download
= 0;
2902 } if (rs
->next_attempt_at
< now
) {
2903 rs
->should_download
= 1;
2907 char fp[HEX_DIGEST_LEN+1];
2908 base16_encode(fp, HEX_DIGEST_LEN+1, rs->status.identity_digest, DIGEST_LEN);
2909 log_fn(LOG_NOTICE, "Not yet ready to download %s (%d more seconds)", fp,
2910 (int)(rs->next_attempt_at-now));
2912 rs
->should_download
= 0;
2917 downloading
= smartlist_create();
2918 for (i
= 0; i
< n_conns
; ++i
) {
2919 connection_t
*conn
= carray
[i
];
2920 if (conn
->type
== CONN_TYPE_DIR
&&
2921 conn
->purpose
== DIR_PURPOSE_FETCH_SERVERDESC
&&
2922 !conn
->marked_for_close
) {
2923 if (!strcmpstart(conn
->requested_resource
, "all"))
2925 dir_split_resource_into_fingerprints(conn
->requested_resource
,
2926 downloading
, NULL
, 1);
2930 if (n_downloadable
) {
2931 SMARTLIST_FOREACH(downloading
, const char *, d
,
2933 local_routerstatus_t
*rs
;
2934 if ((rs
= router_get_combined_status_by_digest(d
)) && rs
->should_download
) {
2935 rs
->should_download
= 0;
2941 SMARTLIST_FOREACH(downloading
, char *, cp
, tor_free(cp
));
2942 smartlist_free(downloading
);
2943 if (!n_downloadable
)
2946 if (routerlist
&& n_downloadable
) {
2947 SMARTLIST_FOREACH(routerlist
->routers
, routerinfo_t
*, ri
,
2949 local_routerstatus_t
*rs
;
2950 if (!(rs
= router_get_combined_status_by_digest(ri
->identity_digest
)) ||
2951 !rs
->should_download
) {
2952 // log_fn(LOG_NOTICE, "No status for %s", fp);
2955 if (!ri
->xx_is_recognized
) {
2956 ++xx_n_unrecognized
;
2957 if (ri
->xx_is_extra_new
)
2960 if (ri
->xx_is_extra_new
)
2963 /* Change this "or" to be an "and" once dirs generate hashes right.
2964 * Remove the version check once older versions are uncommon.
2966 if (!memcmp(ri
->signed_descriptor_digest
, rs
->status
.descriptor_digest
,
2968 rs
->status
.published_on
<= ri
->published_on
) {
2970 rs
->should_download
= 0;
2972 } else if (!mirror
&&
2974 !tor_version_as_new_as(ri
->platform
, "0.1.1.6-alpha") &&
2975 ri
->published_on
+ MAX_OLD_SERVER_DOWNLOAD_RATE
> now
) {
2976 /* Same digest, or date is up-to-date, or we have a comparatively recent
2977 * server with an old version.
2978 * No need to download it. */
2979 // log_fn(LOG_NOTICE, "Up-to-date status for %s", fp);
2981 if (!ri
->xx_is_recognized
)
2983 rs
->should_download
= 0;
2986 char t1[ISO_TIME_LEN+1];
2987 char t2[ISO_TIME_LEN+1];
2988 format_iso_time(t1, rs->satus.published_on);
2989 format_iso_time(t2, ri->published_on);
2990 log_fn(LOG_NOTICE, "Out-of-date status for %s %s (%d %d) [%s %s]", fp,
2992 !memcmp(ri->signed_descriptor_digest,rs->status.descriptor_digest,
2994 rs->published_on < ri->published_on,
3000 info(LD_DIR
, "%d router descriptors are downloadable; "
3001 "%d are up to date; %d are in progress; "
3002 "%d are not ready to retry; "
3003 "%d are not published recently enough to be worthwhile; "
3004 "%d are running pre-0.1.1.6 Tors and aren't stale enough to replace. "
3005 "%d have unrecognized descriptor hashes; %d are newer than the dirs "
3006 "have told us about; %d are both unrecognized and newer than any "
3007 "publication date in the networkstatus; %d are both "
3008 "unrecognized and running a pre-0.1.1.6 version.",
3009 n_downloadable
, n_uptodate
, n_in_progress
, n_not_ready
,
3010 n_obsolete
, n_skip_old
, xx_n_unrecognized
, xx_n_extra_new
, xx_n_both
,
3013 if (!n_downloadable
)
3016 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
3018 if (rs
->should_download
) {
3019 char *fp
= tor_malloc(HEX_DIGEST_LEN
+1);
3020 base16_encode(fp
, HEX_DIGEST_LEN
+1, rs
->status
.identity_digest
, DIGEST_LEN
);
3021 smartlist_add(superseded
, fp
);
3028 /** Initiate new router downloads as needed.
3030 * We only allow one router descriptor download at a time.
3031 * If we have less than two network-status documents, we ask
3032 * a directory for "all descriptors."
3033 * Otherwise, we ask for all descriptors that we think are different
3034 * from what we have.
3037 update_router_descriptor_downloads(time_t now
)
3039 #define MAX_DL_PER_REQUEST 128
3040 #define MIN_DL_PER_REQUEST 4
3041 #define MIN_REQUESTS 3
3042 #define MAX_DL_TO_DELAY 16
3043 #define MAX_CLIENT_INTERVAL_WITHOUT_REQUEST 10*60
3044 #define MAX_SERVER_INTERVAL_WITHOUT_REQUEST 1*60
3045 smartlist_t
*downloadable
= NULL
;
3047 int dirserv
= server_mode(get_options()) && get_options()->DirPort
;
3048 int should_delay
, n_downloadable
;
3049 if (!networkstatus_list
|| smartlist_len(networkstatus_list
)<2)
3053 notice(LD_DIR
, "Launching request for all routers");
3054 last_routerdesc_download_attempted
= now
;
3055 directory_get_from_dirserver(DIR_PURPOSE_FETCH_SERVERDESC
,"all.z",1);
3059 downloadable
= router_list_downloadable();
3060 n_downloadable
= smartlist_len(downloadable
);
3061 if (n_downloadable
>= MAX_DL_TO_DELAY
) {
3063 "There are enough downloadable routerdescs to launch requests.");
3065 } else if (n_downloadable
== 0) {
3066 debug(LD_DIR
, "No routerdescs need to be downloaded.");
3070 should_delay
= (last_routerdesc_download_attempted
+
3071 MAX_SERVER_INTERVAL_WITHOUT_REQUEST
) > now
;
3073 should_delay
= (last_routerdesc_download_attempted
+
3074 MAX_CLIENT_INTERVAL_WITHOUT_REQUEST
) > now
;
3077 debug(LD_DIR
, "There are not many downloadable routerdescs; waiting till we have some more.");
3079 info(LD_DIR
, "There are not many downloadable routerdescs, but we've been waiting long enough (%d seconds). Downloading.",
3080 (int)(now
-last_routerdesc_download_attempted
));
3083 if (! should_delay
) {
3084 int i
, j
, n_per_request
=MAX_DL_PER_REQUEST
;
3085 size_t r_len
= MAX_DL_PER_REQUEST
*(HEX_DIGEST_LEN
+1)+16;
3086 char *resource
= tor_malloc(r_len
);
3089 n_per_request
= (n_downloadable
+MIN_REQUESTS
-1) / MIN_REQUESTS
;
3090 if (n_per_request
> MAX_DL_PER_REQUEST
)
3091 n_per_request
= MAX_DL_PER_REQUEST
;
3092 if (n_per_request
< MIN_DL_PER_REQUEST
)
3093 n_per_request
= MIN_DL_PER_REQUEST
;
3095 info(LD_DIR
, "Launching %d request%s for %d router%s, %d at a time",
3096 (n_downloadable
+n_per_request
-1)/n_per_request
,
3097 n_downloadable
>n_per_request
?"s":"",
3098 n_downloadable
, n_downloadable
>1?"s":"", n_per_request
);
3099 for (i
=0; i
< n_downloadable
; i
+= n_per_request
) {
3100 char *cp
= resource
;
3101 memcpy(resource
, "fp/", 3);
3103 for (j
=i
; j
< i
+n_per_request
&& j
< n_downloadable
; ++j
) {
3104 memcpy(cp
, smartlist_get(downloadable
, j
), HEX_DIGEST_LEN
);
3105 cp
+= HEX_DIGEST_LEN
;
3108 memcpy(cp
-1, ".z", 3);
3109 directory_get_from_dirserver(DIR_PURPOSE_FETCH_SERVERDESC
,resource
,1);
3111 last_routerdesc_download_attempted
= now
;
3114 SMARTLIST_FOREACH(downloadable
, char *, c
, tor_free(c
));
3115 smartlist_free(downloadable
);
3118 /** Return true iff we have enough networkstatus and router information to
3119 * start building circuits. Right now, this means "at least 2 networkstatus
3120 * documents, and at least 1/4 of expected routers." */
3122 router_have_minimum_dir_info(void)
3125 if (!networkstatus_list
|| smartlist_len(networkstatus_list
)<2 ||
3128 SMARTLIST_FOREACH(networkstatus_list
, networkstatus_t
*, ns
,
3129 tot
+= smartlist_len(ns
->entries
));
3130 avg
= tot
/ smartlist_len(networkstatus_list
);
3131 return smartlist_len(routerlist
->routers
) > (avg
/4);
3134 /** Reset the descriptor download failure count on all routers, so that we
3135 * can retry any long-failed routers immediately.
3138 router_reset_descriptor_download_failures(void)
3140 if (!routerstatus_list
)
3142 SMARTLIST_FOREACH(routerstatus_list
, local_routerstatus_t
*, rs
,
3144 rs
->n_download_failures
= 0;
3145 rs
->next_attempt_at
= 0;
3147 last_routerdesc_download_attempted
= 0;
3150 /** Return true iff the only differences between r1 and r2 are such that
3151 * would not cause a recent (post 0.1.1.6) direserver to republish.
3154 router_differences_are_cosmetic(routerinfo_t
*r1
, routerinfo_t
*r2
)
3156 tor_assert(r1
&& r2
);
3158 /* post-0.1.1.6 servers know what they're doing. */
3159 if (tor_version_as_new_as(r1
->platform
, "0.1.1.6-alpha") ||
3160 tor_version_as_new_as(r2
->platform
, "0.1.1.6-alpha"))
3163 /* r1 should be the one that was published first. */
3164 if (r1
->published_on
> r2
->published_on
) {
3165 routerinfo_t
*ri_tmp
= r2
;
3170 /* If any key fields differ, they're different. */
3171 if (strcasecmp(r1
->address
, r2
->address
) ||
3172 strcasecmp(r1
->nickname
, r2
->nickname
) ||
3173 r1
->or_port
!= r2
->or_port
||
3174 r1
->dir_port
!= r2
->dir_port
||
3175 crypto_pk_cmp_keys(r1
->onion_pkey
, r2
->onion_pkey
) ||
3176 crypto_pk_cmp_keys(r1
->identity_pkey
, r2
->identity_pkey
) ||
3177 strcasecmp(r1
->platform
, r2
->platform
) ||
3178 (r1
->contact_info
&& !r2
->contact_info
) || /* contact_info is optional */
3179 (!r1
->contact_info
&& r2
->contact_info
) ||
3180 (r1
->contact_info
&& r2
->contact_info
&& strcasecmp(r1
->contact_info
, r2
->contact_info
)) ||
3181 r1
->is_hibernating
!= r2
->is_hibernating
||
3182 config_cmp_addr_policies(r1
->exit_policy
, r2
->exit_policy
))
3184 if ((r1
->declared_family
== NULL
) != (r2
->declared_family
== NULL
))
3186 if (r1
->declared_family
&& r2
->declared_family
) {
3188 if (smartlist_len(r1
->declared_family
)!=smartlist_len(r2
->declared_family
))
3190 n
= smartlist_len(r1
->declared_family
);
3191 for (i
=0; i
< n
; ++i
) {
3192 if (strcasecmp(smartlist_get(r1
->declared_family
, i
),
3193 smartlist_get(r2
->declared_family
, i
)))
3198 /* Did bandwidth change a lot? */
3199 if ((r1
->bandwidthcapacity
< r2
->bandwidthcapacity
/2) ||
3200 (r2
->bandwidthcapacity
< r1
->bandwidthcapacity
/2))
3203 /* Did more than 12 hours pass? */
3204 if (r1
->published_on
+ 12*60*60 < r2
->published_on
)
3207 /* Did uptime fail to increase by approximately the amount we would think,
3208 * give or take 30 minutes? */
3209 if (abs(r2
->uptime
- (r1
->uptime
+ (r2
->published_on
-r1
->published_on
)))>30*60)
3212 /* Otherwise, the difference is cosmetic. */
3217 routerlist_assert_ok(routerlist_t
*rl
)
3219 digestmap_iter_t
*iter
;
3223 SMARTLIST_FOREACH(rl
->routers
, routerinfo_t
*, r
,
3225 r2
= digestmap_get(rl
->identity_map
, r
->identity_digest
);
3226 tor_assert(r
== r2
);
3227 r2
= digestmap_get(rl
->desc_digest_map
, r
->signed_descriptor_digest
);
3228 tor_assert(r
== r2
);
3230 SMARTLIST_FOREACH(rl
->old_routers
, routerinfo_t
*, r
,
3232 r2
= digestmap_get(rl
->identity_map
, r
->identity_digest
);
3233 tor_assert(r
!= r2
);
3234 r2
= digestmap_get(rl
->desc_digest_map
, r
->signed_descriptor_digest
);
3235 tor_assert(r
== r2
);
3237 iter
= digestmap_iter_init(rl
->identity_map
);
3238 while (!digestmap_iter_done(iter
)) {
3242 digestmap_iter_get(iter
, &d
, &_r
);
3244 tor_assert(!memcmp(r
->identity_digest
, d
, DIGEST_LEN
));
3245 iter
= digestmap_iter_next(rl
->identity_map
, iter
);
3247 iter
= digestmap_iter_init(rl
->desc_digest_map
);
3248 while (!digestmap_iter_done(iter
)) {
3252 digestmap_iter_get(iter
, &d
, &_r
);
3254 tor_assert(!memcmp(r
->signed_descriptor_digest
, d
, DIGEST_LEN
));
3255 iter
= digestmap_iter_next(rl
->desc_digest_map
, iter
);