1 /* Copyright (c) 2001-2004, Roger Dingledine.
2 * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
3 * Copyright (c) 2007-2011, The Tor Project, Inc. */
4 /* See LICENSE for licensing information */
7 #if defined(EXPORTMALLINFO) && defined(HAVE_MALLOC_H) && defined(HAVE_MALLINFO)
15 * \brief Code to send and fetch directories and router
16 * descriptors via HTTP. Directories use dirserv.c to generate the
17 * results; clients use routers.c to parse them.
20 /* In-points to directory.c:
22 * - directory_post_to_dirservers(), called from
23 * router_upload_dir_desc_to_dirservers() in router.c
24 * upload_service_descriptor() in rendservice.c
25 * - directory_get_from_dirserver(), called from
26 * rend_client_refetch_renddesc() in rendclient.c
27 * run_scheduled_events() in main.c
29 * - connection_dir_process_inbuf(), called from
30 * connection_process_inbuf() in connection.c
31 * - connection_dir_finished_flushing(), called from
32 * connection_finished_flushing() in connection.c
33 * - connection_dir_finished_connecting(), called from
34 * connection_finished_connecting() in connection.c
36 static void directory_send_command(dir_connection_t
*conn
,
37 int purpose
, int direct
, const char *resource
,
38 const char *payload
, size_t payload_len
,
39 int supports_conditional_consensus
,
40 time_t if_modified_since
);
41 static int directory_handle_command(dir_connection_t
*conn
);
42 static int body_is_plausible(const char *body
, size_t body_len
, int purpose
);
43 static int purpose_needs_anonymity(uint8_t dir_purpose
,
44 uint8_t router_purpose
);
45 static char *http_get_header(const char *headers
, const char *which
);
46 static void http_set_address_origin(const char *headers
, connection_t
*conn
);
47 static void connection_dir_download_networkstatus_failed(
48 dir_connection_t
*conn
, int status_code
);
49 static void connection_dir_download_routerdesc_failed(dir_connection_t
*conn
);
50 static void connection_dir_download_cert_failed(
51 dir_connection_t
*conn
, int status_code
);
52 static void dir_networkstatus_download_failed(smartlist_t
*failed
,
54 static void dir_routerdesc_download_failed(smartlist_t
*failed
,
58 int was_descriptor_digests
);
59 static void note_client_request(int purpose
, int compressed
, size_t bytes
);
60 static int client_likes_consensus(networkstatus_t
*v
, const char *want_url
);
62 static void directory_initiate_command_rend(const char *address
,
63 const tor_addr_t
*addr
,
66 int supports_conditional_consensus
,
67 int supports_begindir
,
70 uint8_t router_purpose
,
71 int anonymized_connection
,
75 time_t if_modified_since
,
76 const rend_data_t
*rend_query
);
78 /********* START VARIABLES **********/
80 /** How far in the future do we allow a directory server to tell us it is
81 * before deciding that one of us has the wrong time? */
82 #define ALLOW_DIRECTORY_TIME_SKEW (30*60)
84 #define X_ADDRESS_HEADER "X-Your-Address-Is: "
86 /** HTTP cache control: how long do we tell proxies they can cache each
87 * kind of document we serve? */
88 #define FULL_DIR_CACHE_LIFETIME (60*60)
89 #define RUNNINGROUTERS_CACHE_LIFETIME (20*60)
90 #define DIRPORTFRONTPAGE_CACHE_LIFETIME (20*60)
91 #define NETWORKSTATUS_CACHE_LIFETIME (5*60)
92 #define ROUTERDESC_CACHE_LIFETIME (30*60)
93 #define ROUTERDESC_BY_DIGEST_CACHE_LIFETIME (48*60*60)
94 #define ROBOTS_CACHE_LIFETIME (24*60*60)
96 /********* END VARIABLES ************/
98 /** Return true iff the directory purpose 'purpose' must use an
99 * anonymous connection to a directory. */
101 purpose_needs_anonymity(uint8_t dir_purpose
, uint8_t router_purpose
)
103 if (get_options()->AllDirActionsPrivate
)
105 if (router_purpose
== ROUTER_PURPOSE_BRIDGE
&& has_completed_circuit
)
106 return 1; /* if no circuits yet, we may need this info to bootstrap. */
107 if (dir_purpose
== DIR_PURPOSE_UPLOAD_DIR
||
108 dir_purpose
== DIR_PURPOSE_UPLOAD_VOTE
||
109 dir_purpose
== DIR_PURPOSE_UPLOAD_SIGNATURES
||
110 dir_purpose
== DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
||
111 dir_purpose
== DIR_PURPOSE_FETCH_STATUS_VOTE
||
112 dir_purpose
== DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
||
113 dir_purpose
== DIR_PURPOSE_FETCH_CONSENSUS
||
114 dir_purpose
== DIR_PURPOSE_FETCH_CERTIFICATE
||
115 dir_purpose
== DIR_PURPOSE_FETCH_SERVERDESC
||
116 dir_purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
)
121 /** Return a newly allocated string describing <b>auth</b>. */
123 authority_type_to_string(authority_type_t auth
)
126 smartlist_t
*lst
= smartlist_create();
127 if (auth
& V1_AUTHORITY
)
128 smartlist_add(lst
, (void*)"V1");
129 if (auth
& V2_AUTHORITY
)
130 smartlist_add(lst
, (void*)"V2");
131 if (auth
& V3_AUTHORITY
)
132 smartlist_add(lst
, (void*)"V3");
133 if (auth
& BRIDGE_AUTHORITY
)
134 smartlist_add(lst
, (void*)"Bridge");
135 if (auth
& HIDSERV_AUTHORITY
)
136 smartlist_add(lst
, (void*)"Hidden service");
137 if (smartlist_len(lst
)) {
138 result
= smartlist_join_strings(lst
, ", ", 0, NULL
);
140 result
= tor_strdup("[Not an authority]");
146 /** Return a string describing a given directory connection purpose. */
148 dir_conn_purpose_to_string(int purpose
)
152 case DIR_PURPOSE_FETCH_RENDDESC
:
153 return "hidden-service descriptor fetch";
154 case DIR_PURPOSE_UPLOAD_DIR
:
155 return "server descriptor upload";
156 case DIR_PURPOSE_UPLOAD_RENDDESC
:
157 return "hidden-service descriptor upload";
158 case DIR_PURPOSE_UPLOAD_VOTE
:
159 return "server vote upload";
160 case DIR_PURPOSE_UPLOAD_SIGNATURES
:
161 return "consensus signature upload";
162 case DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
:
163 return "network-status fetch";
164 case DIR_PURPOSE_FETCH_SERVERDESC
:
165 return "server descriptor fetch";
166 case DIR_PURPOSE_FETCH_EXTRAINFO
:
167 return "extra-info fetch";
168 case DIR_PURPOSE_FETCH_CONSENSUS
:
169 return "consensus network-status fetch";
170 case DIR_PURPOSE_FETCH_CERTIFICATE
:
171 return "authority cert fetch";
172 case DIR_PURPOSE_FETCH_STATUS_VOTE
:
173 return "status vote fetch";
174 case DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
:
175 return "consensus signature fetch";
176 case DIR_PURPOSE_FETCH_RENDDESC_V2
:
177 return "hidden-service v2 descriptor fetch";
178 case DIR_PURPOSE_UPLOAD_RENDDESC_V2
:
179 return "hidden-service v2 descriptor upload";
182 log_warn(LD_BUG
, "Called with unknown purpose %d", purpose
);
186 /** Return true iff <b>identity_digest</b> is the digest of a router we
187 * believe to support extrainfo downloads. (If <b>is_authority</b> we do
188 * additional checking that's only valid for authorities.) */
190 router_supports_extrainfo(const char *identity_digest
, int is_authority
)
192 routerinfo_t
*ri
= router_get_by_digest(identity_digest
);
195 if (ri
->caches_extra_info
)
197 if (is_authority
&& ri
->platform
&&
198 tor_version_as_new_as(ri
->platform
, "Tor 0.2.0.0-alpha-dev (r10070)"))
202 routerstatus_t
*rs
= router_get_consensus_status_by_id(identity_digest
);
203 if (rs
&& rs
->version_supports_extrainfo_upload
)
209 /** Return true iff any trusted directory authority has accepted our
212 * We consider any authority sufficient because waiting for all of
213 * them means it never happens while any authority is down; we don't
214 * go for something more complex in the middle (like \>1/3 or \>1/2 or
215 * \>=1/2) because that doesn't seem necessary yet.
218 directories_have_accepted_server_descriptor(void)
220 smartlist_t
*servers
= router_get_trusted_dir_servers();
221 or_options_t
*options
= get_options();
222 SMARTLIST_FOREACH(servers
, trusted_dir_server_t
*, d
, {
223 if ((d
->type
& options
->_PublishServerDescriptor
) &&
224 d
->has_accepted_serverdesc
) {
231 /** Start a connection to every suitable directory authority, using
232 * connection purpose 'purpose' and uploading the payload 'payload'
233 * (length 'payload_len'). The purpose should be one of
234 * 'DIR_PURPOSE_UPLOAD_DIR' or 'DIR_PURPOSE_UPLOAD_RENDDESC'.
236 * <b>type</b> specifies what sort of dir authorities (V1, V2,
237 * HIDSERV, BRIDGE) we should upload to.
239 * If <b>extrainfo_len</b> is nonzero, the first <b>payload_len</b> bytes of
240 * <b>payload</b> hold a router descriptor, and the next <b>extrainfo_len</b>
241 * bytes of <b>payload</b> hold an extra-info document. Upload the descriptor
242 * to all authorities, and the extra-info document to all authorities that
246 directory_post_to_dirservers(uint8_t dir_purpose
, uint8_t router_purpose
,
247 authority_type_t type
,
249 size_t payload_len
, size_t extrainfo_len
)
252 smartlist_t
*dirservers
= router_get_trusted_dir_servers();
254 tor_assert(dirservers
);
255 /* This tries dirservers which we believe to be down, but ultimately, that's
256 * harmless, and we may as well err on the side of getting things uploaded.
258 SMARTLIST_FOREACH_BEGIN(dirservers
, trusted_dir_server_t
*, ds
) {
259 routerstatus_t
*rs
= &(ds
->fake_status
);
260 size_t upload_len
= payload_len
;
263 if ((type
& ds
->type
) == 0)
266 found
= 1; /* at least one authority of this type was listed */
267 if (dir_purpose
== DIR_PURPOSE_UPLOAD_DIR
)
268 ds
->has_accepted_serverdesc
= 0;
270 if (extrainfo_len
&& router_supports_extrainfo(ds
->digest
, 1)) {
271 upload_len
+= extrainfo_len
;
272 log_info(LD_DIR
, "Uploading an extrainfo too (length %d)",
273 (int) extrainfo_len
);
275 tor_addr_from_ipv4h(&ds_addr
, ds
->addr
);
276 post_via_tor
= purpose_needs_anonymity(dir_purpose
, router_purpose
) ||
277 !fascist_firewall_allows_address_dir(&ds_addr
, ds
->dir_port
);
278 directory_initiate_command_routerstatus(rs
, dir_purpose
,
281 NULL
, payload
, upload_len
, 0);
282 } SMARTLIST_FOREACH_END(ds
);
284 char *s
= authority_type_to_string(type
);
285 log_warn(LD_DIR
, "Publishing server descriptor to directory authorities "
286 "of type '%s', but no authorities of that type listed!", s
);
291 /** Start a connection to a random running directory server, using
292 * connection purpose <b>dir_purpose</b>, intending to fetch descriptors
293 * of purpose <b>router_purpose</b>, and requesting <b>resource</b>.
294 * Use <b>pds_flags</b> as arguments to router_pick_directory_server()
295 * or router_pick_trusteddirserver().
298 directory_get_from_dirserver(uint8_t dir_purpose
, uint8_t router_purpose
,
299 const char *resource
, int pds_flags
)
301 routerstatus_t
*rs
= NULL
;
302 or_options_t
*options
= get_options();
303 int prefer_authority
= directory_fetches_from_authorities(options
);
304 int get_via_tor
= purpose_needs_anonymity(dir_purpose
, router_purpose
);
305 authority_type_t type
;
306 time_t if_modified_since
= 0;
308 /* FFFF we could break this switch into its own function, and call
309 * it elsewhere in directory.c. -RD */
310 switch (dir_purpose
) {
311 case DIR_PURPOSE_FETCH_EXTRAINFO
:
312 type
= EXTRAINFO_CACHE
|
313 (router_purpose
== ROUTER_PURPOSE_BRIDGE
? BRIDGE_AUTHORITY
:
316 case DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
:
319 case DIR_PURPOSE_FETCH_SERVERDESC
:
320 type
= (router_purpose
== ROUTER_PURPOSE_BRIDGE
? BRIDGE_AUTHORITY
:
323 case DIR_PURPOSE_FETCH_RENDDESC
:
324 type
= HIDSERV_AUTHORITY
;
326 case DIR_PURPOSE_FETCH_STATUS_VOTE
:
327 case DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
:
330 case DIR_PURPOSE_FETCH_CONSENSUS
:
331 case DIR_PURPOSE_FETCH_CERTIFICATE
:
335 log_warn(LD_BUG
, "Unexpected purpose %d", (int)dir_purpose
);
339 if (dir_purpose
== DIR_PURPOSE_FETCH_CONSENSUS
) {
340 networkstatus_t
*v
= networkstatus_get_latest_consensus();
342 if_modified_since
= v
->valid_after
+ 180;
345 if (!options
->FetchServerDescriptors
&& type
!= HIDSERV_AUTHORITY
)
349 if (options
->UseBridges
&& type
!= BRIDGE_AUTHORITY
) {
350 /* want to ask a running bridge for which we have a descriptor. */
351 /* XXX022 we assume that all of our bridges can answer any
352 * possible directory question. This won't be true forever. -RD */
353 /* It certainly is not true with conditional consensus downloading,
354 * so, for now, never assume the server supports that. */
355 routerinfo_t
*ri
= choose_random_entry(NULL
);
358 tor_addr_from_ipv4h(&addr
, ri
->addr
);
359 directory_initiate_command(ri
->address
, &addr
,
361 0, /* don't use conditional consensus url */
362 1, ri
->cache_info
.identity_digest
,
365 0, resource
, NULL
, 0, if_modified_since
);
367 log_notice(LD_DIR
, "Ignoring directory request, since no bridge "
368 "nodes are available yet.");
371 if (prefer_authority
|| type
== BRIDGE_AUTHORITY
) {
372 /* only ask authdirservers, and don't ask myself */
373 rs
= router_pick_trusteddirserver(type
, pds_flags
);
374 if (rs
== NULL
&& (pds_flags
& PDS_NO_EXISTING_SERVERDESC_FETCH
)) {
375 /* We don't want to fetch from any authorities that we're currently
376 * fetching server descriptors from, and we got no match. Did we
377 * get no match because all the authorities have connections
378 * fetching server descriptors (in which case we should just
379 * return,) or because all the authorities are down or on fire or
380 * unreachable or something (in which case we should go on with
381 * our fallback code)? */
382 pds_flags
&= ~PDS_NO_EXISTING_SERVERDESC_FETCH
;
383 rs
= router_pick_trusteddirserver(type
, pds_flags
);
385 log_debug(LD_DIR
, "Deferring serverdesc fetch: all authorities "
391 if (!rs
&& type
!= BRIDGE_AUTHORITY
) {
392 /* anybody with a non-zero dirport will do */
393 rs
= router_pick_directory_server(type
, pds_flags
);
395 log_info(LD_DIR
, "No router found for %s; falling back to "
396 "dirserver list.", dir_conn_purpose_to_string(dir_purpose
));
397 rs
= router_pick_trusteddirserver(type
, pds_flags
);
399 get_via_tor
= 1; /* last resort: try routing it via Tor */
403 } else { /* get_via_tor */
404 /* Never use fascistfirewall; we're going via Tor. */
405 if (dir_purpose
== DIR_PURPOSE_FETCH_RENDDESC
) {
406 /* only ask hidserv authorities, any of them will do */
407 pds_flags
|= PDS_IGNORE_FASCISTFIREWALL
|PDS_ALLOW_SELF
;
408 rs
= router_pick_trusteddirserver(HIDSERV_AUTHORITY
, pds_flags
);
410 /* anybody with a non-zero dirport will do. Disregard firewalls. */
411 pds_flags
|= PDS_IGNORE_FASCISTFIREWALL
;
412 rs
= router_pick_directory_server(type
, pds_flags
);
413 /* If we have any hope of building an indirect conn, we know some router
414 * descriptors. If (rs==NULL), we can't build circuits anyway, so
415 * there's no point in falling back to the authorities in this case. */
420 directory_initiate_command_routerstatus(rs
, dir_purpose
,
427 "While fetching directory info, "
428 "no running dirservers known. Will try again later. "
429 "(purpose %d)", dir_purpose
);
430 if (!purpose_needs_anonymity(dir_purpose
, router_purpose
)) {
431 /* remember we tried them all and failed. */
432 directory_all_unreachable(time(NULL
));
437 /** As directory_get_from_dirserver, but initiates a request to <i>every</i>
438 * directory authority other than ourself. Only for use by authorities when
439 * searching for missing information while voting. */
441 directory_get_from_all_authorities(uint8_t dir_purpose
,
442 uint8_t router_purpose
,
443 const char *resource
)
445 tor_assert(dir_purpose
== DIR_PURPOSE_FETCH_STATUS_VOTE
||
446 dir_purpose
== DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
);
448 SMARTLIST_FOREACH(router_get_trusted_dir_servers(),
449 trusted_dir_server_t
*, ds
,
452 if (router_digest_is_me(ds
->digest
))
454 if (!(ds
->type
& V3_AUTHORITY
))
456 rs
= &ds
->fake_status
;
457 directory_initiate_command_routerstatus(rs
, dir_purpose
, router_purpose
,
458 0, resource
, NULL
, 0, 0);
462 /** Same as directory_initiate_command_routerstatus(), but accepts
463 * rendezvous data to fetch a hidden service descriptor. */
465 directory_initiate_command_routerstatus_rend(routerstatus_t
*status
,
467 uint8_t router_purpose
,
468 int anonymized_connection
,
469 const char *resource
,
472 time_t if_modified_since
,
473 const rend_data_t
*rend_query
)
475 routerinfo_t
*router
;
476 char address_buf
[INET_NTOA_BUF_LEN
+1];
480 router
= router_get_by_digest(status
->identity_digest
);
481 if (!router
&& anonymized_connection
) {
482 log_info(LD_DIR
, "Not sending anonymized request to directory '%s'; we "
483 "don't have its router descriptor.", status
->nickname
);
486 address
= router
->address
;
488 in
.s_addr
= htonl(status
->addr
);
489 tor_inet_ntoa(&in
, address_buf
, sizeof(address_buf
));
490 address
= address_buf
;
492 tor_addr_from_ipv4h(&addr
, status
->addr
);
493 directory_initiate_command_rend(address
, &addr
,
494 status
->or_port
, status
->dir_port
,
495 status
->version_supports_conditional_consensus
,
496 status
->version_supports_begindir
,
497 status
->identity_digest
,
498 dir_purpose
, router_purpose
,
499 anonymized_connection
, resource
,
500 payload
, payload_len
, if_modified_since
,
504 /** Launch a new connection to the directory server <b>status</b> to
505 * upload or download a server or rendezvous
506 * descriptor. <b>dir_purpose</b> determines what
507 * kind of directory connection we're launching, and must be one of
508 * DIR_PURPOSE_{FETCH|UPLOAD}_{DIR|RENDDESC|RENDDESC_V2}. <b>router_purpose</b>
509 * specifies the descriptor purposes we have in mind (currently only
510 * used for FETCH_DIR).
512 * When uploading, <b>payload</b> and <b>payload_len</b> determine the content
513 * of the HTTP post. Otherwise, <b>payload</b> should be NULL.
515 * When fetching a rendezvous descriptor, <b>resource</b> is the service ID we
519 directory_initiate_command_routerstatus(routerstatus_t
*status
,
521 uint8_t router_purpose
,
522 int anonymized_connection
,
523 const char *resource
,
526 time_t if_modified_since
)
528 directory_initiate_command_routerstatus_rend(status
, dir_purpose
,
530 anonymized_connection
, resource
,
531 payload
, payload_len
,
532 if_modified_since
, NULL
);
535 /** Return true iff <b>conn</b> is the client side of a directory connection
536 * we launched to ourself in order to determine the reachability of our
539 directory_conn_is_self_reachability_test(dir_connection_t
*conn
)
541 if (conn
->requested_resource
&&
542 !strcmpstart(conn
->requested_resource
,"authority")) {
543 routerinfo_t
*me
= router_get_my_routerinfo();
545 router_digest_is_me(conn
->identity_digest
) &&
546 tor_addr_eq_ipv4h(&conn
->_base
.addr
, me
->addr
) && /*XXXX prop 118*/
547 me
->dir_port
== conn
->_base
.port
)
553 /** Called when we are unable to complete the client's request to a directory
554 * server due to a network error: Mark the router as down and try again if
558 connection_dir_request_failed(dir_connection_t
*conn
)
560 if (directory_conn_is_self_reachability_test(conn
)) {
561 return; /* this was a test fetch. don't retry. */
563 if (entry_list_can_grow(get_options()))
564 router_set_status(conn
->identity_digest
, 0); /* don't try him again */
565 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
) {
566 log_info(LD_DIR
, "Giving up on directory server at '%s'; retrying",
567 conn
->_base
.address
);
568 connection_dir_download_networkstatus_failed(conn
, -1);
569 } else if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_SERVERDESC
||
570 conn
->_base
.purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
) {
571 log_info(LD_DIR
, "Giving up on directory server at '%s'; retrying",
572 conn
->_base
.address
);
573 connection_dir_download_routerdesc_failed(conn
);
574 } else if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_CONSENSUS
) {
575 networkstatus_consensus_download_failed(0);
576 } else if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_CERTIFICATE
) {
577 log_info(LD_DIR
, "Giving up on directory server at '%s'; retrying",
578 conn
->_base
.address
);
579 connection_dir_download_cert_failed(conn
, 0);
580 } else if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
) {
581 log_info(LD_DIR
, "Giving up downloading detached signatures from '%s'",
582 conn
->_base
.address
);
583 } else if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_STATUS_VOTE
) {
584 log_info(LD_DIR
, "Giving up downloading votes from '%s'",
585 conn
->_base
.address
);
589 /** Called when an attempt to download one or more network status
590 * documents on connection <b>conn</b> failed. Decide whether to
591 * retry the fetch now, later, or never.
594 connection_dir_download_networkstatus_failed(dir_connection_t
*conn
,
597 if (!conn
->requested_resource
) {
598 /* We never reached directory_send_command, which means that we never
599 * opened a network connection. Either we're out of sockets, or the
600 * network is down. Either way, retrying would be pointless. */
603 if (!strcmpstart(conn
->requested_resource
, "all")) {
604 /* We're a non-authoritative directory cache; try again. Ignore status
605 * code, since we don't want to keep trying forever in a tight loop
606 * if all the authorities are shutting us out. */
607 smartlist_t
*trusted_dirs
= router_get_trusted_dir_servers();
608 SMARTLIST_FOREACH(trusted_dirs
, trusted_dir_server_t
*, ds
,
609 download_status_failed(&ds
->v2_ns_dl_status
, 0));
610 directory_get_from_dirserver(conn
->_base
.purpose
, conn
->router_purpose
,
611 "all.z", 0 /* don't retry_if_no_servers */);
612 } else if (!strcmpstart(conn
->requested_resource
, "fp/")) {
613 /* We were trying to download by fingerprint; mark them all as having
614 * failed, and possibly retry them later.*/
615 smartlist_t
*failed
= smartlist_create();
616 dir_split_resource_into_fingerprints(conn
->requested_resource
+3,
618 if (smartlist_len(failed
)) {
619 dir_networkstatus_download_failed(failed
, status_code
);
620 SMARTLIST_FOREACH(failed
, char *, cp
, tor_free(cp
));
622 smartlist_free(failed
);
626 /** Called when an attempt to download one or more router descriptors
627 * or extra-info documents on connection <b>conn</b> failed.
630 connection_dir_download_routerdesc_failed(dir_connection_t
*conn
)
632 /* No need to increment the failure count for routerdescs, since
633 * it's not their fault. */
635 /* No need to relaunch descriptor downloads here: we already do it
636 * every 10 or 60 seconds (FOO_DESCRIPTOR_RETRY_INTERVAL) in main.c. */
637 tor_assert(conn
->_base
.purpose
== DIR_PURPOSE_FETCH_SERVERDESC
||
638 conn
->_base
.purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
);
643 /** Called when an attempt to fetch a certificate fails. */
645 connection_dir_download_cert_failed(dir_connection_t
*conn
, int status
)
648 tor_assert(conn
->_base
.purpose
== DIR_PURPOSE_FETCH_CERTIFICATE
);
650 if (!conn
->requested_resource
)
652 failed
= smartlist_create();
653 dir_split_resource_into_fingerprints(conn
->requested_resource
+3,
655 SMARTLIST_FOREACH(failed
, char *, cp
,
657 authority_cert_dl_failed(cp
, status
);
660 smartlist_free(failed
);
662 update_certificate_downloads(time(NULL
));
665 /** Evaluate the situation and decide if we should use an encrypted
666 * "begindir-style" connection for this directory request.
667 * 1) If or_port is 0, or it's a direct conn and or_port is firewalled
668 * or we're a dir mirror, no.
669 * 2) If we prefer to avoid begindir conns, and we're not fetching or
670 * publishing a bridge relay descriptor, no.
674 directory_command_should_use_begindir(or_options_t
*options
,
675 const tor_addr_t
*addr
,
676 int or_port
, uint8_t router_purpose
,
677 int anonymized_connection
)
680 return 0; /* We don't know an ORPort -- no chance. */
681 if (!anonymized_connection
)
682 if (!fascist_firewall_allows_address_or(addr
, or_port
) ||
683 directory_fetches_from_authorities(options
) ||
684 (server_mode(options
) && !options
->Address
))
685 return 0; /* We're firewalled or are acting like a relay -- also no. */
686 if (!options
->TunnelDirConns
&&
687 router_purpose
!= ROUTER_PURPOSE_BRIDGE
)
688 return 0; /* We prefer to avoid using begindir conns. Fine. */
692 /** Helper for directory_initiate_command_routerstatus: send the
693 * command to a server whose address is <b>address</b>, whose IP is
694 * <b>addr</b>, whose directory port is <b>dir_port</b>, whose tor version
695 * <b>supports_begindir</b>, and whose identity key digest is
698 directory_initiate_command(const char *address
, const tor_addr_t
*_addr
,
699 uint16_t or_port
, uint16_t dir_port
,
700 int supports_conditional_consensus
,
701 int supports_begindir
, const char *digest
,
702 uint8_t dir_purpose
, uint8_t router_purpose
,
703 int anonymized_connection
, const char *resource
,
704 const char *payload
, size_t payload_len
,
705 time_t if_modified_since
)
707 directory_initiate_command_rend(address
, _addr
, or_port
, dir_port
,
708 supports_conditional_consensus
,
709 supports_begindir
, digest
, dir_purpose
,
710 router_purpose
, anonymized_connection
,
711 resource
, payload
, payload_len
,
712 if_modified_since
, NULL
);
715 /** Same as directory_initiate_command(), but accepts rendezvous data to
716 * fetch a hidden service descriptor. */
718 directory_initiate_command_rend(const char *address
, const tor_addr_t
*_addr
,
719 uint16_t or_port
, uint16_t dir_port
,
720 int supports_conditional_consensus
,
721 int supports_begindir
, const char *digest
,
722 uint8_t dir_purpose
, uint8_t router_purpose
,
723 int anonymized_connection
,
724 const char *resource
,
725 const char *payload
, size_t payload_len
,
726 time_t if_modified_since
,
727 const rend_data_t
*rend_query
)
729 dir_connection_t
*conn
;
730 or_options_t
*options
= get_options();
731 int socket_error
= 0;
732 int use_begindir
= supports_begindir
&&
733 directory_command_should_use_begindir(options
, _addr
,
734 or_port
, router_purpose
, anonymized_connection
);
739 tor_assert(or_port
|| dir_port
);
742 tor_addr_copy(&addr
, _addr
);
744 log_debug(LD_DIR
, "anonymized %d, use_begindir %d.",
745 anonymized_connection
, use_begindir
);
747 log_debug(LD_DIR
, "Initiating %s", dir_conn_purpose_to_string(dir_purpose
));
749 conn
= dir_connection_new(AF_INET
);
751 /* set up conn so it's got all the data we need to remember */
752 tor_addr_copy(&conn
->_base
.addr
, &addr
);
753 conn
->_base
.port
= use_begindir
? or_port
: dir_port
;
754 conn
->_base
.address
= tor_strdup(address
);
755 memcpy(conn
->identity_digest
, digest
, DIGEST_LEN
);
757 conn
->_base
.purpose
= dir_purpose
;
758 conn
->router_purpose
= router_purpose
;
760 /* give it an initial state */
761 conn
->_base
.state
= DIR_CONN_STATE_CONNECTING
;
763 /* decide whether we can learn our IP address from this conn */
764 conn
->dirconn_direct
= !anonymized_connection
;
766 /* copy rendezvous data, if any */
768 conn
->rend_data
= rend_data_dup(rend_query
);
770 if (!anonymized_connection
&& !use_begindir
) {
771 /* then we want to connect to dirport directly */
773 if (options
->HttpProxy
) {
774 tor_addr_from_ipv4h(&addr
, options
->HttpProxyAddr
);
775 dir_port
= options
->HttpProxyPort
;
778 switch (connection_connect(TO_CONN(conn
), conn
->_base
.address
, &addr
,
779 dir_port
, &socket_error
)) {
781 connection_dir_request_failed(conn
); /* retry if we want */
782 /* XXX we only pass 'conn' above, not 'resource', 'payload',
783 * etc. So in many situations it can't retry! -RD */
784 connection_free(TO_CONN(conn
));
787 /* start flushing conn */
788 conn
->_base
.state
= DIR_CONN_STATE_CLIENT_SENDING
;
791 /* queue the command on the outbuf */
792 directory_send_command(conn
, dir_purpose
, 1, resource
,
793 payload
, payload_len
,
794 supports_conditional_consensus
,
796 connection_watch_events(TO_CONN(conn
), EV_READ
| EV_WRITE
);
797 /* writable indicates finish, readable indicates broken link,
798 error indicates broken link in windowsland. */
800 } else { /* we want to connect via a tor connection */
801 edge_connection_t
*linked_conn
;
803 /* If it's an anonymized connection, remember the fact that we
804 * wanted it for later: maybe we'll want it again soon. */
805 if (anonymized_connection
&& use_begindir
)
806 rep_hist_note_used_internal(time(NULL
), 0, 1);
807 else if (anonymized_connection
&& !use_begindir
)
808 rep_hist_note_used_port(time(NULL
), conn
->_base
.port
);
810 /* make an AP connection
811 * populate it and add it at the right state
815 connection_ap_make_link(conn
->_base
.address
, conn
->_base
.port
,
816 digest
, use_begindir
, conn
->dirconn_direct
);
818 log_warn(LD_NET
,"Making tunnel to dirserver failed.");
819 connection_mark_for_close(TO_CONN(conn
));
822 connection_link_connections(TO_CONN(conn
), TO_CONN(linked_conn
));
824 if (connection_add(TO_CONN(conn
)) < 0) {
825 log_warn(LD_NET
,"Unable to add connection for link to dirserver.");
826 connection_mark_for_close(TO_CONN(conn
));
829 conn
->_base
.state
= DIR_CONN_STATE_CLIENT_SENDING
;
830 /* queue the command on the outbuf */
831 directory_send_command(conn
, dir_purpose
, 0, resource
,
832 payload
, payload_len
,
833 supports_conditional_consensus
,
835 connection_watch_events(TO_CONN(conn
), EV_READ
| EV_WRITE
);
836 connection_start_reading(TO_CONN(linked_conn
));
840 /** Return true iff anything we say on <b>conn</b> is being encrypted before
841 * we send it to the client/server. */
843 connection_dir_is_encrypted(dir_connection_t
*conn
)
845 /* Right now it's sufficient to see if conn is or has been linked, since
846 * the only thing it could be linked to is an edge connection on a
847 * circuit, and the only way it could have been unlinked is at the edge
848 * connection getting closed.
850 return TO_CONN(conn
)->linked
;
853 /** Helper for sorting
855 * sort strings alphabetically
858 _compare_strs(const void **a
, const void **b
)
860 const char *s1
= *a
, *s2
= *b
;
861 return strcmp(s1
, s2
);
864 #define CONDITIONAL_CONSENSUS_FPR_LEN 3
865 #if (CONDITIONAL_CONSENSUS_FPR_LEN > DIGEST_LEN)
866 #error "conditional consensus fingerprint length is larger than digest length"
869 /** Return the URL we should use for a consensus download.
871 * This url depends on whether or not the server we go to
872 * is sufficiently new to support conditional consensus downloading,
873 * i.e. GET .../consensus/<b>fpr</b>+<b>fpr</b>+<b>fpr</b>
876 directory_get_consensus_url(int supports_conditional_consensus
)
881 if (supports_conditional_consensus
) {
882 char *authority_id_list
;
883 smartlist_t
*authority_digets
= smartlist_create();
885 SMARTLIST_FOREACH(router_get_trusted_dir_servers(),
886 trusted_dir_server_t
*, ds
,
889 if (!(ds
->type
& V3_AUTHORITY
))
892 hex
= tor_malloc(2*CONDITIONAL_CONSENSUS_FPR_LEN
+1);
893 base16_encode(hex
, 2*CONDITIONAL_CONSENSUS_FPR_LEN
+1,
894 ds
->v3_identity_digest
, CONDITIONAL_CONSENSUS_FPR_LEN
);
895 smartlist_add(authority_digets
, hex
);
897 smartlist_sort(authority_digets
, _compare_strs
);
898 authority_id_list
= smartlist_join_strings(authority_digets
,
901 len
= strlen(authority_id_list
)+64;
902 url
= tor_malloc(len
);
903 tor_snprintf(url
, len
, "/tor/status-vote/current/consensus/%s.z",
906 SMARTLIST_FOREACH(authority_digets
, char *, cp
, tor_free(cp
));
907 smartlist_free(authority_digets
);
908 tor_free(authority_id_list
);
910 url
= tor_strdup("/tor/status-vote/current/consensus.z");
915 /** Queue an appropriate HTTP command on conn-\>outbuf. The other args
916 * are as in directory_initiate_command.
919 directory_send_command(dir_connection_t
*conn
,
920 int purpose
, int direct
, const char *resource
,
921 const char *payload
, size_t payload_len
,
922 int supports_conditional_consensus
,
923 time_t if_modified_since
)
925 char proxystring
[256];
926 char proxyauthstring
[256];
927 char hoststring
[128];
928 char imsstring
[RFC1123_TIME_LEN
+32];
931 const char *httpcommand
= NULL
;
935 tor_assert(conn
->_base
.type
== CONN_TYPE_DIR
);
937 tor_free(conn
->requested_resource
);
939 conn
->requested_resource
= tor_strdup(resource
);
941 /* come up with a string for which Host: we want */
942 if (conn
->_base
.port
== 80) {
943 strlcpy(hoststring
, conn
->_base
.address
, sizeof(hoststring
));
945 tor_snprintf(hoststring
, sizeof(hoststring
),"%s:%d",
946 conn
->_base
.address
, conn
->_base
.port
);
949 /* Format if-modified-since */
950 if (!if_modified_since
) {
953 char b
[RFC1123_TIME_LEN
+1];
954 format_rfc1123_time(b
, if_modified_since
);
955 tor_snprintf(imsstring
, sizeof(imsstring
), "\r\nIf-Modified-Since: %s", b
);
958 /* come up with some proxy lines, if we're using one. */
959 if (direct
&& get_options()->HttpProxy
) {
960 char *base64_authenticator
=NULL
;
961 const char *authenticator
= get_options()->HttpProxyAuthenticator
;
963 tor_snprintf(proxystring
, sizeof(proxystring
),"http://%s", hoststring
);
965 base64_authenticator
= alloc_http_authenticator(authenticator
);
966 if (!base64_authenticator
)
967 log_warn(LD_BUG
, "Encoding http authenticator failed");
969 if (base64_authenticator
) {
970 tor_snprintf(proxyauthstring
, sizeof(proxyauthstring
),
971 "\r\nProxy-Authorization: Basic %s",
972 base64_authenticator
);
973 tor_free(base64_authenticator
);
975 proxyauthstring
[0] = 0;
979 proxyauthstring
[0] = 0;
983 case DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
:
984 tor_assert(resource
);
986 len
= strlen(resource
)+32;
987 url
= tor_malloc(len
);
988 tor_snprintf(url
, len
, "/tor/status/%s", resource
);
990 case DIR_PURPOSE_FETCH_CONSENSUS
:
991 tor_assert(!resource
);
992 tor_assert(!payload
);
994 url
= directory_get_consensus_url(supports_conditional_consensus
);
995 log_info(LD_DIR
, "Downloading consensus from %s using %s",
998 case DIR_PURPOSE_FETCH_CERTIFICATE
:
999 tor_assert(resource
);
1000 tor_assert(!payload
);
1001 httpcommand
= "GET";
1002 len
= strlen(resource
)+32;
1003 url
= tor_malloc(len
);
1004 tor_snprintf(url
, len
, "/tor/keys/%s", resource
);
1006 case DIR_PURPOSE_FETCH_STATUS_VOTE
:
1007 tor_assert(resource
);
1008 tor_assert(!payload
);
1009 httpcommand
= "GET";
1010 len
= strlen(resource
)+32;
1011 url
= tor_malloc(len
);
1012 tor_snprintf(url
, len
, "/tor/status-vote/next/%s.z", resource
);
1014 case DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
:
1015 tor_assert(!resource
);
1016 tor_assert(!payload
);
1017 httpcommand
= "GET";
1018 url
= tor_strdup("/tor/status-vote/next/consensus-signatures.z");
1020 case DIR_PURPOSE_FETCH_SERVERDESC
:
1021 tor_assert(resource
);
1022 httpcommand
= "GET";
1023 len
= strlen(resource
)+32;
1024 url
= tor_malloc(len
);
1025 tor_snprintf(url
, len
, "/tor/server/%s", resource
);
1027 case DIR_PURPOSE_FETCH_EXTRAINFO
:
1028 tor_assert(resource
);
1029 httpcommand
= "GET";
1030 len
= strlen(resource
)+32;
1031 url
= tor_malloc(len
);
1032 tor_snprintf(url
, len
, "/tor/extra/%s", resource
);
1034 case DIR_PURPOSE_UPLOAD_DIR
:
1035 tor_assert(!resource
);
1036 tor_assert(payload
);
1037 httpcommand
= "POST";
1038 url
= tor_strdup("/tor/");
1040 case DIR_PURPOSE_UPLOAD_VOTE
:
1041 tor_assert(!resource
);
1042 tor_assert(payload
);
1043 httpcommand
= "POST";
1044 url
= tor_strdup("/tor/post/vote");
1046 case DIR_PURPOSE_UPLOAD_SIGNATURES
:
1047 tor_assert(!resource
);
1048 tor_assert(payload
);
1049 httpcommand
= "POST";
1050 url
= tor_strdup("/tor/post/consensus-signature");
1052 case DIR_PURPOSE_FETCH_RENDDESC
:
1053 tor_assert(resource
);
1054 tor_assert(!payload
);
1056 /* this must be true or we wouldn't be doing the lookup */
1057 tor_assert(strlen(resource
) <= REND_SERVICE_ID_LEN_BASE32
);
1058 /* This breaks the function abstraction. */
1059 conn
->rend_data
= tor_malloc_zero(sizeof(rend_data_t
));
1060 strlcpy(conn
->rend_data
->onion_address
, resource
,
1061 sizeof(conn
->rend_data
->onion_address
));
1062 conn
->rend_data
->rend_desc_version
= 0;
1064 httpcommand
= "GET";
1065 /* Request the most recent versioned descriptor. */
1066 // (XXXX We were going to switch this to fetch rendezvous1 descriptors,
1067 // but that never got testing, and it wasn't a good design.)
1068 len
= strlen(resource
)+32;
1069 url
= tor_malloc(len
);
1070 tor_snprintf(url
, len
, "/tor/rendezvous/%s", resource
);
1072 case DIR_PURPOSE_FETCH_RENDDESC_V2
:
1073 tor_assert(resource
);
1074 tor_assert(strlen(resource
) <= REND_DESC_ID_V2_LEN_BASE32
);
1075 tor_assert(!payload
);
1076 conn
->rend_data
->rend_desc_version
= 2;
1077 httpcommand
= "GET";
1078 len
= strlen(resource
) + 32;
1079 url
= tor_malloc(len
);
1080 tor_snprintf(url
, len
, "/tor/rendezvous2/%s", resource
);
1082 case DIR_PURPOSE_UPLOAD_RENDDESC
:
1083 tor_assert(!resource
);
1084 tor_assert(payload
);
1085 httpcommand
= "POST";
1086 url
= tor_strdup("/tor/rendezvous/publish");
1088 case DIR_PURPOSE_UPLOAD_RENDDESC_V2
:
1089 tor_assert(!resource
);
1090 tor_assert(payload
);
1091 httpcommand
= "POST";
1092 url
= tor_strdup("/tor/rendezvous2/publish");
1099 if (strlen(proxystring
) + strlen(url
) >= 4096) {
1101 "Squid does not like URLs longer than 4095 bytes, and this "
1102 "one is %d bytes long: %s%s",
1103 (int)(strlen(proxystring
) + strlen(url
)), proxystring
, url
);
1106 tor_snprintf(request
, sizeof(request
), "%s %s", httpcommand
, proxystring
);
1107 connection_write_to_buf(request
, strlen(request
), TO_CONN(conn
));
1108 connection_write_to_buf(url
, strlen(url
), TO_CONN(conn
));
1111 if (!strcmp(httpcommand
, "GET") && !payload
) {
1112 tor_snprintf(request
, sizeof(request
),
1113 " HTTP/1.0\r\nHost: %s%s%s\r\n\r\n",
1118 tor_snprintf(request
, sizeof(request
),
1119 " HTTP/1.0\r\nContent-Length: %lu\r\nHost: %s%s%s\r\n\r\n",
1120 payload
? (unsigned long)payload_len
: 0,
1125 connection_write_to_buf(request
, strlen(request
), TO_CONN(conn
));
1128 /* then send the payload afterwards too */
1129 connection_write_to_buf(payload
, payload_len
, TO_CONN(conn
));
1133 /** Parse an HTTP request string <b>headers</b> of the form
1135 * "\%s [http[s]://]\%s HTTP/1..."
1137 * If it's well-formed, strdup the second \%s into *<b>url</b>, and
1138 * nul-terminate it. If the url doesn't start with "/tor/", rewrite it
1139 * so it does. Return 0.
1140 * Otherwise, return -1.
1143 parse_http_url(const char *headers
, char **url
)
1145 char *s
, *start
, *tmp
;
1147 s
= (char *)eat_whitespace_no_nl(headers
);
1149 s
= (char *)find_whitespace(s
); /* get past GET/POST */
1151 s
= (char *)eat_whitespace_no_nl(s
);
1153 start
= s
; /* this is it, assuming it's valid */
1154 s
= (char *)find_whitespace(start
);
1157 /* tolerate the http[s] proxy style of putting the hostname in the url */
1158 if (s
-start
>= 4 && !strcmpstart(start
,"http")) {
1162 if (s
-tmp
>= 3 && !strcmpstart(tmp
,"://")) {
1163 tmp
= strchr(tmp
+3, '/');
1164 if (tmp
&& tmp
< s
) {
1165 log_debug(LD_DIR
,"Skipping over 'http[s]://hostname' string");
1171 if (s
-start
< 5 || strcmpstart(start
,"/tor/")) { /* need to rewrite it */
1172 *url
= tor_malloc(s
- start
+ 5);
1173 strlcpy(*url
,"/tor", s
-start
+5);
1174 strlcat((*url
)+4, start
, s
-start
+1);
1176 *url
= tor_strndup(start
, s
-start
);
1181 /** Return a copy of the first HTTP header in <b>headers</b> whose key is
1182 * <b>which</b>. The key should be given with a terminating colon and space;
1183 * this function copies everything after, up to but not including the
1184 * following \\r\\n. */
1186 http_get_header(const char *headers
, const char *which
)
1188 const char *cp
= headers
;
1190 if (!strcasecmpstart(cp
, which
)) {
1192 cp
+= strlen(which
);
1193 if ((eos
= strchr(cp
,'\r')))
1194 return tor_strndup(cp
, eos
-cp
);
1196 return tor_strdup(cp
);
1198 cp
= strchr(cp
, '\n');
1205 /** If <b>headers</b> indicates that a proxy was involved, then rewrite
1206 * <b>conn</b>-\>address to describe our best guess of the address that
1207 * originated this HTTP request. */
1209 http_set_address_origin(const char *headers
, connection_t
*conn
)
1213 fwd
= http_get_header(headers
, "Forwarded-For: ");
1215 fwd
= http_get_header(headers
, "X-Forwarded-For: ");
1218 if (!tor_inet_aton(fwd
, &in
) || is_internal_IP(ntohl(in
.s_addr
), 0)) {
1219 log_debug(LD_DIR
, "Ignoring unrecognized or internal IP %s",
1224 tor_free(conn
->address
);
1225 conn
->address
= tor_strdup(fwd
);
1230 /** Parse an HTTP response string <b>headers</b> of the form
1232 * "HTTP/1.\%d \%d\%s\r\n...".
1235 * If it's well-formed, assign the status code to *<b>code</b> and
1236 * return 0. Otherwise, return -1.
1238 * On success: If <b>date</b> is provided, set *date to the Date
1239 * header in the http headers, or 0 if no such header is found. If
1240 * <b>compression</b> is provided, set *<b>compression</b> to the
1241 * compression method given in the Content-Encoding header, or 0 if no
1242 * such header is found, or -1 if the value of the header is not
1243 * recognized. If <b>reason</b> is provided, strdup the reason string
1247 parse_http_response(const char *headers
, int *code
, time_t *date
,
1248 compress_method_t
*compression
, char **reason
)
1251 char datestr
[RFC1123_TIME_LEN
+1];
1252 smartlist_t
*parsed_headers
;
1253 tor_assert(headers
);
1256 while (TOR_ISSPACE(*headers
)) headers
++; /* tolerate leading whitespace */
1258 if (tor_sscanf(headers
, "HTTP/1.%u %u", &n1
, &n2
) < 2 ||
1259 (n1
!= 0 && n1
!= 1) ||
1260 (n2
< 100 || n2
>= 600)) {
1261 log_warn(LD_HTTP
,"Failed to parse header %s",escaped(headers
));
1266 parsed_headers
= smartlist_create();
1267 smartlist_split_string(parsed_headers
, headers
, "\n",
1268 SPLIT_SKIP_SPACE
|SPLIT_IGNORE_BLANK
, -1);
1270 smartlist_t
*status_line_elements
= smartlist_create();
1271 tor_assert(smartlist_len(parsed_headers
));
1272 smartlist_split_string(status_line_elements
,
1273 smartlist_get(parsed_headers
, 0),
1274 " ", SPLIT_SKIP_SPACE
|SPLIT_IGNORE_BLANK
, 3);
1275 tor_assert(smartlist_len(status_line_elements
) <= 3);
1276 if (smartlist_len(status_line_elements
) == 3) {
1277 *reason
= smartlist_get(status_line_elements
, 2);
1278 smartlist_set(status_line_elements
, 2, NULL
); /* Prevent free */
1280 SMARTLIST_FOREACH(status_line_elements
, char *, cp
, tor_free(cp
));
1281 smartlist_free(status_line_elements
);
1285 SMARTLIST_FOREACH(parsed_headers
, const char *, s
,
1286 if (!strcmpstart(s
, "Date: ")) {
1287 strlcpy(datestr
, s
+6, sizeof(datestr
));
1288 /* This will do nothing on failure, so we don't need to check
1289 the result. We shouldn't warn, since there are many other valid
1290 date formats besides the one we use. */
1291 parse_rfc1123_time(datestr
, date
);
1296 const char *enc
= NULL
;
1297 SMARTLIST_FOREACH(parsed_headers
, const char *, s
,
1298 if (!strcmpstart(s
, "Content-Encoding: ")) {
1301 if (!enc
|| !strcmp(enc
, "identity")) {
1302 *compression
= NO_METHOD
;
1303 } else if (!strcmp(enc
, "deflate") || !strcmp(enc
, "x-deflate")) {
1304 *compression
= ZLIB_METHOD
;
1305 } else if (!strcmp(enc
, "gzip") || !strcmp(enc
, "x-gzip")) {
1306 *compression
= GZIP_METHOD
;
1308 log_info(LD_HTTP
, "Unrecognized content encoding: %s. Trying to deal.",
1310 *compression
= UNKNOWN_METHOD
;
1313 SMARTLIST_FOREACH(parsed_headers
, char *, s
, tor_free(s
));
1314 smartlist_free(parsed_headers
);
1319 /** Return true iff <b>body</b> doesn't start with a plausible router or
1320 * running-list or directory opening. This is a sign of possible compression.
1323 body_is_plausible(const char *body
, size_t len
, int purpose
)
1327 return 1; /* empty bodies don't need decompression */
1330 if (purpose
!= DIR_PURPOSE_FETCH_RENDDESC
) {
1331 if (!strcmpstart(body
,"router") ||
1332 !strcmpstart(body
,"signed-directory") ||
1333 !strcmpstart(body
,"network-status") ||
1334 !strcmpstart(body
,"running-routers"))
1336 for (i
=0;i
<32;++i
) {
1337 if (!TOR_ISPRINT(body
[i
]) && !TOR_ISSPACE(body
[i
]))
1346 /** Called when we've just fetched a bunch of router descriptors in
1347 * <b>body</b>. The list <b>which</b>, if present, holds digests for
1348 * descriptors we requested: descriptor digests if <b>descriptor_digests</b>
1349 * is true, or identity digests otherwise. Parse the descriptors, validate
1350 * them, and annotate them as having purpose <b>purpose</b> and as having been
1351 * downloaded from <b>source</b>.
1353 * Return the number of routers actually added. */
1355 load_downloaded_routers(const char *body
, smartlist_t
*which
,
1356 int descriptor_digests
,
1361 char time_buf
[ISO_TIME_LEN
+1];
1363 int general
= router_purpose
== ROUTER_PURPOSE_GENERAL
;
1364 format_iso_time(time_buf
, time(NULL
));
1367 if (tor_snprintf(buf
, sizeof(buf
),
1368 "@downloaded-at %s\n"
1370 "%s%s%s", time_buf
, escaped(source
),
1371 !general
? "@purpose " : "",
1372 !general
? router_purpose_to_string(router_purpose
) : "",
1373 !general
? "\n" : "")<0)
1376 added
= router_load_routers_from_string(body
, NULL
, SAVED_NOWHERE
, which
,
1377 descriptor_digests
, buf
);
1378 control_event_bootstrap(BOOTSTRAP_STATUS_LOADING_DESCRIPTORS
,
1379 count_loading_descriptors_progress());
1383 /** We are a client, and we've finished reading the server's
1384 * response. Parse it and act appropriately.
1386 * If we're still happy with using this directory server in the future, return
1387 * 0. Otherwise return -1; and the caller should consider trying the request
1390 * The caller will take care of marking the connection for close.
1393 connection_dir_client_reached_eof(dir_connection_t
*conn
)
1397 char *reason
= NULL
;
1398 size_t body_len
=0, orig_len
=0;
1400 time_t date_header
=0;
1402 compress_method_t compression
;
1405 int allow_partial
= (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_SERVERDESC
||
1406 conn
->_base
.purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
);
1407 int was_compressed
=0;
1408 time_t now
= time(NULL
);
1410 switch (fetch_from_buf_http(conn
->_base
.inbuf
,
1411 &headers
, MAX_HEADERS_SIZE
,
1412 &body
, &body_len
, MAX_DIR_DL_SIZE
,
1414 case -1: /* overflow */
1415 log_warn(LD_PROTOCOL
,
1416 "'fetch' response too large (server '%s:%d'). Closing.",
1417 conn
->_base
.address
, conn
->_base
.port
);
1421 "'fetch' response not all here, but we're at eof. Closing.");
1423 /* case 1, fall through */
1425 orig_len
= body_len
;
1427 if (parse_http_response(headers
, &status_code
, &date_header
,
1428 &compression
, &reason
) < 0) {
1429 log_warn(LD_HTTP
,"Unparseable headers (server '%s:%d'). Closing.",
1430 conn
->_base
.address
, conn
->_base
.port
);
1431 tor_free(body
); tor_free(headers
);
1434 if (!reason
) reason
= tor_strdup("[no reason given]");
1437 "Received response from directory server '%s:%d': %d %s",
1438 conn
->_base
.address
, conn
->_base
.port
, status_code
,
1441 /* now check if it's got any hints for us about our IP address. */
1442 if (conn
->dirconn_direct
) {
1443 char *guess
= http_get_header(headers
, X_ADDRESS_HEADER
);
1445 router_new_address_suggestion(guess
, conn
);
1450 if (date_header
> 0) {
1451 /* The date header was written very soon after we sent our request,
1452 * so compute the skew as the difference between sending the request
1453 * and the date header. (We used to check now-date_header, but that's
1454 * inaccurate if we spend a lot of time downloading.)
1456 delta
= conn
->_base
.timestamp_lastwritten
- date_header
;
1457 if (labs(delta
)>ALLOW_DIRECTORY_TIME_SKEW
) {
1459 int trusted
= router_digest_is_trusted_dir(conn
->identity_digest
);
1460 format_time_interval(dbuf
, sizeof(dbuf
), delta
);
1461 log_fn(trusted
? LOG_WARN
: LOG_INFO
,
1463 "Received directory with skewed time (server '%s:%d'): "
1464 "It seems that our clock is %s by %s, or that theirs is %s. "
1465 "Tor requires an accurate clock to work: please check your time, "
1466 "timezone, and date settings.",
1467 conn
->_base
.address
, conn
->_base
.port
,
1468 delta
>0 ? "ahead" : "behind", dbuf
,
1469 delta
>0 ? "behind" : "ahead");
1470 skewed
= 1; /* don't check the recommended-versions line */
1471 control_event_general_status(trusted
? LOG_WARN
: LOG_NOTICE
,
1472 "CLOCK_SKEW SKEW=%ld SOURCE=DIRSERV:%s:%d",
1473 delta
, conn
->_base
.address
, conn
->_base
.port
);
1475 log_debug(LD_HTTP
, "Time on received directory is within tolerance; "
1476 "we are %ld seconds skewed. (That's okay.)", delta
);
1479 (void) skewed
; /* skewed isn't used yet. */
1481 if (status_code
== 503 && body_len
< 16) {
1483 trusted_dir_server_t
*ds
;
1484 log_info(LD_DIR
,"Received http status code %d (%s) from server "
1485 "'%s:%d'. I'll try again soon.",
1486 status_code
, escaped(reason
), conn
->_base
.address
,
1488 if ((rs
= router_get_consensus_status_by_id(conn
->identity_digest
)))
1489 rs
->last_dir_503_at
= now
;
1490 if ((ds
= router_get_trusteddirserver_by_digest(conn
->identity_digest
)))
1491 ds
->fake_status
.last_dir_503_at
= now
;
1493 tor_free(body
); tor_free(headers
); tor_free(reason
);
1495 } else if (status_code
== 503) {
1496 /* XXXX022 Remove this once every server with bug 539 is obsolete. */
1497 log_info(LD_DIR
, "Server at '%s:%d' sent us a 503 response, but included "
1498 "a body anyway. We'll pretend it gave us a 200.",
1499 conn
->_base
.address
, conn
->_base
.port
);
1503 plausible
= body_is_plausible(body
, body_len
, conn
->_base
.purpose
);
1504 if (compression
!= NO_METHOD
|| !plausible
) {
1505 char *new_body
= NULL
;
1507 compress_method_t guessed
= detect_compression_method(body
, body_len
);
1508 if (compression
== UNKNOWN_METHOD
|| guessed
!= compression
) {
1509 /* Tell the user if we don't believe what we're told about compression.*/
1510 const char *description1
, *description2
;
1511 if (compression
== ZLIB_METHOD
)
1512 description1
= "as deflated";
1513 else if (compression
== GZIP_METHOD
)
1514 description1
= "as gzipped";
1515 else if (compression
== NO_METHOD
)
1516 description1
= "as uncompressed";
1518 description1
= "with an unknown Content-Encoding";
1519 if (guessed
== ZLIB_METHOD
)
1520 description2
= "deflated";
1521 else if (guessed
== GZIP_METHOD
)
1522 description2
= "gzipped";
1523 else if (!plausible
)
1524 description2
= "confusing binary junk";
1526 description2
= "uncompressed";
1528 log_info(LD_HTTP
, "HTTP body from server '%s:%d' was labeled %s, "
1529 "but it seems to be %s.%s",
1530 conn
->_base
.address
, conn
->_base
.port
, description1
,
1532 (compression
>0 && guessed
>0)?" Trying both.":"");
1534 /* Try declared compression first if we can. */
1535 if (compression
== GZIP_METHOD
|| compression
== ZLIB_METHOD
)
1536 tor_gzip_uncompress(&new_body
, &new_len
, body
, body_len
, compression
,
1537 !allow_partial
, LOG_PROTOCOL_WARN
);
1538 /* Okay, if that didn't work, and we think that it was compressed
1539 * differently, try that. */
1541 (guessed
== GZIP_METHOD
|| guessed
== ZLIB_METHOD
) &&
1542 compression
!= guessed
)
1543 tor_gzip_uncompress(&new_body
, &new_len
, body
, body_len
, guessed
,
1544 !allow_partial
, LOG_PROTOCOL_WARN
);
1545 /* If we're pretty sure that we have a compressed directory, and
1546 * we didn't manage to uncompress it, then warn and bail. */
1547 if (!plausible
&& !new_body
) {
1548 log_fn(LOG_PROTOCOL_WARN
, LD_HTTP
,
1549 "Unable to decompress HTTP body (server '%s:%d').",
1550 conn
->_base
.address
, conn
->_base
.port
);
1551 tor_free(body
); tor_free(headers
); tor_free(reason
);
1562 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
) {
1563 smartlist_t
*which
= NULL
;
1564 v2_networkstatus_source_t source
;
1566 log_info(LD_DIR
,"Received networkstatus objects (size %d) from server "
1567 "'%s:%d'",(int) body_len
, conn
->_base
.address
, conn
->_base
.port
);
1568 if (status_code
!= 200) {
1570 "Received http status code %d (%s) from server "
1571 "'%s:%d' while fetching \"/tor/status/%s\". I'll try again soon.",
1572 status_code
, escaped(reason
), conn
->_base
.address
,
1573 conn
->_base
.port
, conn
->requested_resource
);
1574 tor_free(body
); tor_free(headers
); tor_free(reason
);
1575 connection_dir_download_networkstatus_failed(conn
, status_code
);
1578 if (conn
->requested_resource
&&
1579 !strcmpstart(conn
->requested_resource
,"fp/")) {
1580 source
= NS_FROM_DIR_BY_FP
;
1581 which
= smartlist_create();
1582 dir_split_resource_into_fingerprints(conn
->requested_resource
+3,
1584 } else if (conn
->requested_resource
&&
1585 !strcmpstart(conn
->requested_resource
, "all")) {
1586 source
= NS_FROM_DIR_ALL
;
1587 which
= smartlist_create();
1588 SMARTLIST_FOREACH(router_get_trusted_dir_servers(),
1589 trusted_dir_server_t
*, ds
,
1591 char *hex
= tor_malloc(HEX_DIGEST_LEN
+1);
1592 base16_encode(hex
, HEX_DIGEST_LEN
+1, ds
->digest
, DIGEST_LEN
);
1593 smartlist_add(which
, hex
);
1596 /* XXXX Can we even end up here? -- weasel*/
1597 source
= NS_FROM_DIR_BY_FP
;
1598 log_warn(LD_BUG
, "We received a networkstatus but we didn't ask "
1599 "for it by fp, nor did we ask for all.");
1603 char *next
= strstr(cp
, "\nnetwork-status-version");
1606 /* learn from it, and then remove it from 'which' */
1607 if (router_set_networkstatus_v2(cp
, now
, source
, which
)<0)
1615 /* launches router downloads as needed */
1616 routers_update_all_from_networkstatus(now
, 2);
1617 directory_info_has_arrived(now
, 0);
1619 if (smartlist_len(which
)) {
1620 dir_networkstatus_download_failed(which
, status_code
);
1622 SMARTLIST_FOREACH(which
, char *, s
, tor_free(s
));
1623 smartlist_free(which
);
1627 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_CONSENSUS
) {
1629 if (status_code
!= 200) {
1630 int severity
= (status_code
== 304) ? LOG_INFO
: LOG_WARN
;
1631 log(severity
, LD_DIR
,
1632 "Received http status code %d (%s) from server "
1633 "'%s:%d' while fetching consensus directory.",
1634 status_code
, escaped(reason
), conn
->_base
.address
,
1636 tor_free(body
); tor_free(headers
); tor_free(reason
);
1637 networkstatus_consensus_download_failed(status_code
);
1640 log_info(LD_DIR
,"Received consensus directory (size %d) from server "
1641 "'%s:%d'",(int) body_len
, conn
->_base
.address
, conn
->_base
.port
);
1642 if ((r
=networkstatus_set_current_consensus(body
, 0))<0) {
1643 log_fn(r
<-1?LOG_WARN
:LOG_INFO
, LD_DIR
,
1644 "Unable to load consensus directory downloaded from "
1645 "server '%s:%d'. I'll try again soon.",
1646 conn
->_base
.address
, conn
->_base
.port
);
1647 tor_free(body
); tor_free(headers
); tor_free(reason
);
1648 networkstatus_consensus_download_failed(0);
1651 /* launches router downloads as needed */
1652 routers_update_all_from_networkstatus(now
, 3);
1653 directory_info_has_arrived(now
, 0);
1654 log_info(LD_DIR
, "Successfully loaded consensus.");
1657 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_CERTIFICATE
) {
1658 if (status_code
!= 200) {
1660 "Received http status code %d (%s) from server "
1661 "'%s:%d' while fetching \"/tor/keys/%s\".",
1662 status_code
, escaped(reason
), conn
->_base
.address
,
1663 conn
->_base
.port
, conn
->requested_resource
);
1664 connection_dir_download_cert_failed(conn
, status_code
);
1665 tor_free(body
); tor_free(headers
); tor_free(reason
);
1668 log_info(LD_DIR
,"Received authority certificates (size %d) from server "
1669 "'%s:%d'",(int) body_len
, conn
->_base
.address
, conn
->_base
.port
);
1670 if (trusted_dirs_load_certs_from_string(body
, 0, 1)<0) {
1671 log_warn(LD_DIR
, "Unable to parse fetched certificates");
1672 connection_dir_download_cert_failed(conn
, status_code
);
1674 directory_info_has_arrived(now
, 0);
1675 log_info(LD_DIR
, "Successfully loaded certificates from fetch.");
1678 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_STATUS_VOTE
) {
1681 log_info(LD_DIR
,"Got votes (size %d) from server %s:%d",
1682 (int) body_len
, conn
->_base
.address
, conn
->_base
.port
);
1683 if (status_code
!= 200) {
1685 "Received http status code %d (%s) from server "
1686 "'%s:%d' while fetching \"/tor/status-vote/next/%s.z\".",
1687 status_code
, escaped(reason
), conn
->_base
.address
,
1688 conn
->_base
.port
, conn
->requested_resource
);
1689 tor_free(body
); tor_free(headers
); tor_free(reason
);
1692 dirvote_add_vote(body
, &msg
, &st
);
1694 log_warn(LD_DIR
, "Error adding retrieved vote: %s", msg
);
1696 log_info(LD_DIR
, "Added vote(s) successfully [msg: %s]", msg
);
1699 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
) {
1700 const char *msg
= NULL
;
1701 log_info(LD_DIR
,"Got detached signatures (size %d) from server %s:%d",
1702 (int) body_len
, conn
->_base
.address
, conn
->_base
.port
);
1703 if (status_code
!= 200) {
1705 "Received http status code %d (%s) from server "
1706 "'%s:%d' while fetching \"/tor/status-vote/consensus-signatures.z\".",
1707 status_code
, escaped(reason
), conn
->_base
.address
,
1709 tor_free(body
); tor_free(headers
); tor_free(reason
);
1712 if (dirvote_add_signatures(body
, conn
->_base
.address
, &msg
)<0) {
1713 log_warn(LD_DIR
, "Problem adding detached signatures from %s:%d: %s",
1714 conn
->_base
.address
, conn
->_base
.port
, msg
?msg
:"???");
1718 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_SERVERDESC
||
1719 conn
->_base
.purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
) {
1720 int was_ei
= conn
->_base
.purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
;
1721 smartlist_t
*which
= NULL
;
1722 int n_asked_for
= 0;
1723 int descriptor_digests
= conn
->requested_resource
&&
1724 !strcmpstart(conn
->requested_resource
,"d/");
1725 log_info(LD_DIR
,"Received %s (size %d) from server '%s:%d'",
1726 was_ei
? "extra server info" : "server info",
1727 (int)body_len
, conn
->_base
.address
, conn
->_base
.port
);
1728 if (conn
->requested_resource
&&
1729 (!strcmpstart(conn
->requested_resource
,"d/") ||
1730 !strcmpstart(conn
->requested_resource
,"fp/"))) {
1731 which
= smartlist_create();
1732 dir_split_resource_into_fingerprints(conn
->requested_resource
+
1733 (descriptor_digests
? 2 : 3),
1735 n_asked_for
= smartlist_len(which
);
1737 if (status_code
!= 200) {
1738 int dir_okay
= status_code
== 404 ||
1739 (status_code
== 400 && !strcmp(reason
, "Servers unavailable."));
1740 /* 404 means that it didn't have them; no big deal.
1741 * Older (pre-0.1.1.8) servers said 400 Servers unavailable instead. */
1742 log_fn(dir_okay
? LOG_INFO
: LOG_WARN
, LD_DIR
,
1743 "Received http status code %d (%s) from server '%s:%d' "
1744 "while fetching \"/tor/server/%s\". I'll try again soon.",
1745 status_code
, escaped(reason
), conn
->_base
.address
,
1746 conn
->_base
.port
, conn
->requested_resource
);
1748 connection_dir_download_routerdesc_failed(conn
);
1750 dir_routerdesc_download_failed(which
, status_code
,
1751 conn
->router_purpose
,
1752 was_ei
, descriptor_digests
);
1753 SMARTLIST_FOREACH(which
, char *, cp
, tor_free(cp
));
1754 smartlist_free(which
);
1756 tor_free(body
); tor_free(headers
); tor_free(reason
);
1757 return dir_okay
? 0 : -1;
1759 /* Learn the routers, assuming we requested by fingerprint or "all"
1762 * We use "authority" to fetch our own descriptor for
1763 * testing, and to fetch bridge descriptors for bootstrapping. Ignore
1764 * the output of "authority" requests unless we are using bridges,
1765 * since otherwise they'll be the response from reachability tests,
1766 * and we don't really want to add that to our routerlist. */
1767 if (which
|| (conn
->requested_resource
&&
1768 (!strcmpstart(conn
->requested_resource
, "all") ||
1769 (!strcmpstart(conn
->requested_resource
, "authority") &&
1770 get_options()->UseBridges
)))) {
1771 /* as we learn from them, we remove them from 'which' */
1773 router_load_extrainfo_from_string(body
, NULL
, SAVED_NOWHERE
, which
,
1774 descriptor_digests
);
1776 //router_load_routers_from_string(body, NULL, SAVED_NOWHERE, which,
1777 // descriptor_digests, conn->router_purpose);
1778 if (load_downloaded_routers(body
, which
, descriptor_digests
,
1779 conn
->router_purpose
,
1780 conn
->_base
.address
))
1781 directory_info_has_arrived(now
, 0);
1784 if (which
) { /* mark remaining ones as failed */
1785 log_info(LD_DIR
, "Received %d/%d %s requested from %s:%d",
1786 n_asked_for
-smartlist_len(which
), n_asked_for
,
1787 was_ei
? "extra-info documents" : "router descriptors",
1788 conn
->_base
.address
, (int)conn
->_base
.port
);
1789 if (smartlist_len(which
)) {
1790 dir_routerdesc_download_failed(which
, status_code
,
1791 conn
->router_purpose
,
1792 was_ei
, descriptor_digests
);
1794 SMARTLIST_FOREACH(which
, char *, cp
, tor_free(cp
));
1795 smartlist_free(which
);
1797 if (directory_conn_is_self_reachability_test(conn
))
1798 router_dirport_found_reachable();
1801 if (conn
->_base
.purpose
== DIR_PURPOSE_UPLOAD_DIR
) {
1802 switch (status_code
) {
1804 trusted_dir_server_t
*ds
=
1805 router_get_trusteddirserver_by_digest(conn
->identity_digest
);
1806 char *rejected_hdr
= http_get_header(headers
,
1807 "X-Descriptor-Not-New: ");
1810 if (!strcmp(rejected_hdr
, "Yes")) {
1811 log_info(LD_GENERAL
,
1812 "Authority '%s' declined our descriptor (not new)",
1814 /* XXXX use this information; be sure to upload next one
1816 /* XXXX021 On further thought, the task above implies that we're
1817 * basing our regenerate-descriptor time on when we uploaded the
1818 * last descriptor, not on the published time of the last
1819 * descriptor. If those are different, that's a bad thing to
1823 tor_free(rejected_hdr
);
1825 log_info(LD_GENERAL
,"eof (status 200) after uploading server "
1826 "descriptor: finished.");
1827 control_event_server_status(
1828 LOG_NOTICE
, "ACCEPTED_SERVER_DESCRIPTOR DIRAUTH=%s:%d",
1829 conn
->_base
.address
, conn
->_base
.port
);
1831 ds
->has_accepted_serverdesc
= 1;
1832 if (directories_have_accepted_server_descriptor())
1833 control_event_server_status(LOG_NOTICE
, "GOOD_SERVER_DESCRIPTOR");
1837 log_warn(LD_GENERAL
,"http status 400 (%s) response from "
1838 "dirserver '%s:%d'. Please correct.",
1839 escaped(reason
), conn
->_base
.address
, conn
->_base
.port
);
1840 control_event_server_status(LOG_WARN
,
1841 "BAD_SERVER_DESCRIPTOR DIRAUTH=%s:%d REASON=\"%s\"",
1842 conn
->_base
.address
, conn
->_base
.port
, escaped(reason
));
1845 log_warn(LD_GENERAL
,
1846 "http status %d (%s) reason unexpected while uploading "
1847 "descriptor to server '%s:%d').",
1848 status_code
, escaped(reason
), conn
->_base
.address
,
1852 /* return 0 in all cases, since we don't want to mark any
1853 * dirservers down just because they don't like us. */
1856 if (conn
->_base
.purpose
== DIR_PURPOSE_UPLOAD_VOTE
) {
1857 switch (status_code
) {
1859 log_notice(LD_DIR
,"Uploaded a vote to dirserver %s:%d",
1860 conn
->_base
.address
, conn
->_base
.port
);
1864 log_warn(LD_DIR
,"http status 400 (%s) response after uploading "
1865 "vote to dirserver '%s:%d'. Please correct.",
1866 escaped(reason
), conn
->_base
.address
, conn
->_base
.port
);
1869 log_warn(LD_GENERAL
,
1870 "http status %d (%s) reason unexpected while uploading "
1871 "vote to server '%s:%d').",
1872 status_code
, escaped(reason
), conn
->_base
.address
,
1876 /* return 0 in all cases, since we don't want to mark any
1877 * dirservers down just because they don't like us. */
1880 if (conn
->_base
.purpose
== DIR_PURPOSE_UPLOAD_SIGNATURES
) {
1881 switch (status_code
) {
1883 log_notice(LD_DIR
,"Uploaded signature(s) to dirserver %s:%d",
1884 conn
->_base
.address
, conn
->_base
.port
);
1888 log_warn(LD_DIR
,"http status 400 (%s) response after uploading "
1889 "signatures to dirserver '%s:%d'. Please correct.",
1890 escaped(reason
), conn
->_base
.address
, conn
->_base
.port
);
1893 log_warn(LD_GENERAL
,
1894 "http status %d (%s) reason unexpected while uploading "
1895 "signatures to server '%s:%d').",
1896 status_code
, escaped(reason
), conn
->_base
.address
,
1900 /* return 0 in all cases, since we don't want to mark any
1901 * dirservers down just because they don't like us. */
1904 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_RENDDESC
) {
1905 tor_assert(conn
->rend_data
);
1906 log_info(LD_REND
,"Received rendezvous descriptor (size %d, status %d "
1908 (int)body_len
, status_code
, escaped(reason
));
1909 switch (status_code
) {
1911 if (rend_cache_store(body
, body_len
, 0) < -1) {
1912 log_warn(LD_REND
,"Failed to parse rendezvous descriptor.");
1913 /* Any pending rendezvous attempts will notice when
1914 * connection_about_to_close_connection()
1915 * cleans this dir conn up. */
1916 /* We could retry. But since v0 descriptors are going out of
1917 * style, it isn't worth the hassle. We'll do better in v2. */
1919 /* Success, or at least there's a v2 descriptor already
1920 * present. Notify pending connections about this. */
1921 conn
->_base
.purpose
= DIR_PURPOSE_HAS_FETCHED_RENDDESC
;
1922 rend_client_desc_trynow(conn
->rend_data
->onion_address
, -1);
1926 /* Not there. Pending connections will be notified when
1927 * connection_about_to_close_connection() cleans this conn up. */
1931 "http status 400 (%s). Dirserver didn't like our "
1932 "rendezvous query?", escaped(reason
));
1935 log_warn(LD_REND
,"http status %d (%s) response unexpected while "
1936 "fetching hidden service descriptor (server '%s:%d').",
1937 status_code
, escaped(reason
), conn
->_base
.address
,
1943 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_RENDDESC_V2
) {
1944 tor_assert(conn
->rend_data
);
1945 log_info(LD_REND
,"Received rendezvous descriptor (size %d, status %d "
1947 (int)body_len
, status_code
, escaped(reason
));
1948 switch (status_code
) {
1950 switch (rend_cache_store_v2_desc_as_client(body
, conn
->rend_data
)) {
1952 log_warn(LD_REND
,"Fetching v2 rendezvous descriptor failed. "
1953 "Retrying at another directory.");
1954 /* We'll retry when connection_about_to_close_connection()
1955 * cleans this dir conn up. */
1958 /* We already have a v0 descriptor here. Ignoring this one
1959 * and _not_ performing another request. */
1960 log_info(LD_REND
, "Successfully fetched v2 rendezvous "
1961 "descriptor, but we already have a v0 descriptor.");
1962 conn
->_base
.purpose
= DIR_PURPOSE_HAS_FETCHED_RENDDESC
;
1965 /* success. notify pending connections about this. */
1966 log_info(LD_REND
, "Successfully fetched v2 rendezvous "
1968 conn
->_base
.purpose
= DIR_PURPOSE_HAS_FETCHED_RENDDESC
;
1969 rend_client_desc_trynow(conn
->rend_data
->onion_address
, -1);
1974 /* Not there. We'll retry when
1975 * connection_about_to_close_connection() cleans this conn up. */
1976 log_info(LD_REND
,"Fetching v2 rendezvous descriptor failed: "
1977 "Retrying at another directory.");
1980 log_warn(LD_REND
, "Fetching v2 rendezvous descriptor failed: "
1981 "http status 400 (%s). Dirserver didn't like our "
1982 "v2 rendezvous query? Retrying at another directory.",
1986 log_warn(LD_REND
, "Fetching v2 rendezvous descriptor failed: "
1987 "http status %d (%s) response unexpected while "
1988 "fetching v2 hidden service descriptor (server '%s:%d'). "
1989 "Retrying at another directory.",
1990 status_code
, escaped(reason
), conn
->_base
.address
,
1996 if (conn
->_base
.purpose
== DIR_PURPOSE_UPLOAD_RENDDESC
||
1997 conn
->_base
.purpose
== DIR_PURPOSE_UPLOAD_RENDDESC_V2
) {
1998 log_info(LD_REND
,"Uploaded rendezvous descriptor (status %d "
2000 status_code
, escaped(reason
));
2001 switch (status_code
) {
2004 "Uploading rendezvous descriptor: finished with status "
2005 "200 (%s)", escaped(reason
));
2008 log_warn(LD_REND
,"http status 400 (%s) response from dirserver "
2009 "'%s:%d'. Malformed rendezvous descriptor?",
2010 escaped(reason
), conn
->_base
.address
, conn
->_base
.port
);
2013 log_info(LD_REND
,"http status 503 (%s) response from dirserver "
2014 "'%s:%d'. Node is (currently) not acting as v2 hidden "
2015 "service directory.",
2016 escaped(reason
), conn
->_base
.address
, conn
->_base
.port
);
2019 log_warn(LD_REND
,"http status %d (%s) response unexpected (server "
2021 status_code
, escaped(reason
), conn
->_base
.address
,
2026 note_client_request(conn
->_base
.purpose
, was_compressed
, orig_len
);
2027 tor_free(body
); tor_free(headers
); tor_free(reason
);
2031 /** Called when a directory connection reaches EOF. */
2033 connection_dir_reached_eof(dir_connection_t
*conn
)
2036 if (conn
->_base
.state
!= DIR_CONN_STATE_CLIENT_READING
) {
2037 log_info(LD_HTTP
,"conn reached eof, not reading. [state=%d] Closing.",
2039 connection_close_immediate(TO_CONN(conn
)); /* error: give up on flushing */
2040 connection_mark_for_close(TO_CONN(conn
));
2044 retval
= connection_dir_client_reached_eof(conn
);
2045 if (retval
== 0) /* success */
2046 conn
->_base
.state
= DIR_CONN_STATE_CLIENT_FINISHED
;
2047 connection_mark_for_close(TO_CONN(conn
));
2051 /** If any directory object is arriving, and it's over 10MB large, we're
2052 * getting DoS'd. (As of 0.1.2.x, raw directories are about 1MB, and we never
2053 * ask for more than 96 router descriptors at a time.)
2055 #define MAX_DIRECTORY_OBJECT_SIZE (10*(1<<20))
2057 /** Read handler for directory connections. (That's connections <em>to</em>
2058 * directory servers and connections <em>at</em> directory servers.)
2061 connection_dir_process_inbuf(dir_connection_t
*conn
)
2064 tor_assert(conn
->_base
.type
== CONN_TYPE_DIR
);
2066 /* Directory clients write, then read data until they receive EOF;
2067 * directory servers read data until they get an HTTP command, then
2068 * write their response (when it's finished flushing, they mark for
2072 /* If we're on the dirserver side, look for a command. */
2073 if (conn
->_base
.state
== DIR_CONN_STATE_SERVER_COMMAND_WAIT
) {
2074 if (directory_handle_command(conn
) < 0) {
2075 connection_mark_for_close(TO_CONN(conn
));
2081 if (buf_datalen(conn
->_base
.inbuf
) > MAX_DIRECTORY_OBJECT_SIZE
) {
2082 log_warn(LD_HTTP
, "Too much data received from directory connection: "
2083 "denial of service attempt, or you need to upgrade?");
2084 connection_mark_for_close(TO_CONN(conn
));
2088 if (!conn
->_base
.inbuf_reached_eof
)
2089 log_debug(LD_HTTP
,"Got data, not eof. Leaving on inbuf.");
2093 /** Create an http response for the client <b>conn</b> out of
2094 * <b>status</b> and <b>reason_phrase</b>. Write it to <b>conn</b>.
2097 write_http_status_line(dir_connection_t
*conn
, int status
,
2098 const char *reason_phrase
)
2101 if (tor_snprintf(buf
, sizeof(buf
), "HTTP/1.0 %d %s\r\n\r\n",
2102 status
, reason_phrase
? reason_phrase
: "OK") < 0) {
2103 log_warn(LD_BUG
,"status line too long.");
2106 connection_write_to_buf(buf
, strlen(buf
), TO_CONN(conn
));
2109 /** Write the header for an HTTP/1.0 response onto <b>conn</b>-\>outbuf,
2110 * with <b>type</b> as the Content-Type.
2112 * If <b>length</b> is nonnegative, it is the Content-Length.
2113 * If <b>encoding</b> is provided, it is the Content-Encoding.
2114 * If <b>cache_lifetime</b> is greater than 0, the content may be cached for
2115 * up to cache_lifetime seconds. Otherwise, the content may not be cached. */
2117 write_http_response_header_impl(dir_connection_t
*conn
, ssize_t length
,
2118 const char *type
, const char *encoding
,
2119 const char *extra_headers
,
2120 long cache_lifetime
)
2122 char date
[RFC1123_TIME_LEN
+1];
2125 time_t now
= time(NULL
);
2129 format_rfc1123_time(date
, now
);
2131 tor_snprintf(cp
, sizeof(tmp
),
2132 "HTTP/1.0 200 OK\r\nDate: %s\r\n",
2136 tor_snprintf(cp
, sizeof(tmp
)-(cp
-tmp
), "Content-Type: %s\r\n", type
);
2139 if (!is_local_addr(&conn
->_base
.addr
)) {
2140 /* Don't report the source address for a nearby/private connection.
2141 * Otherwise we tend to mis-report in cases where incoming ports are
2142 * being forwarded to a Tor server running behind the firewall. */
2143 tor_snprintf(cp
, sizeof(tmp
)-(cp
-tmp
),
2144 X_ADDRESS_HEADER
"%s\r\n", conn
->_base
.address
);
2148 tor_snprintf(cp
, sizeof(tmp
)-(cp
-tmp
),
2149 "Content-Encoding: %s\r\n", encoding
);
2153 tor_snprintf(cp
, sizeof(tmp
)-(cp
-tmp
),
2154 "Content-Length: %ld\r\n", (long)length
);
2157 if (cache_lifetime
> 0) {
2158 char expbuf
[RFC1123_TIME_LEN
+1];
2159 format_rfc1123_time(expbuf
, now
+ cache_lifetime
);
2160 /* We could say 'Cache-control: max-age=%d' here if we start doing
2162 tor_snprintf(cp
, sizeof(tmp
)-(cp
-tmp
),
2163 "Expires: %s\r\n", expbuf
);
2165 } else if (cache_lifetime
== 0) {
2166 /* We could say 'Cache-control: no-cache' here if we start doing
2168 strlcpy(cp
, "Pragma: no-cache\r\n", sizeof(tmp
)-(cp
-tmp
));
2171 if (extra_headers
) {
2172 strlcpy(cp
, extra_headers
, sizeof(tmp
)-(cp
-tmp
));
2175 if (sizeof(tmp
)-(cp
-tmp
) > 3)
2176 memcpy(cp
, "\r\n", 3);
2179 connection_write_to_buf(tmp
, strlen(tmp
), TO_CONN(conn
));
2182 /** As write_http_response_header_impl, but sets encoding and content-typed
2183 * based on whether the response will be <b>compressed</b> or not. */
2185 write_http_response_header(dir_connection_t
*conn
, ssize_t length
,
2186 int compressed
, long cache_lifetime
)
2188 write_http_response_header_impl(conn
, length
,
2189 compressed
?"application/octet-stream":"text/plain",
2190 compressed
?"deflate":"identity",
2195 #ifdef INSTRUMENT_DOWNLOADS
2196 typedef struct request_t
{
2197 uint64_t bytes
; /**< How many bytes have we transferred? */
2198 uint64_t count
; /**< How many requests have we made? */
2201 /** Map used to keep track of how much data we've up/downloaded in what kind
2202 * of request. Maps from request type to pointer to request_t. */
2203 static strmap_t
*request_map
= NULL
;
2205 /** Record that a client request of <b>purpose</b> was made, and that
2206 * <b>bytes</b> bytes of possibly <b>compressed</b> data were sent/received.
2207 * Used to keep track of how much we've up/downloaded in what kind of
2210 note_client_request(int purpose
, int compressed
, size_t bytes
)
2213 const char *kind
= NULL
;
2215 case DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
: kind
= "dl/status"; break;
2216 case DIR_PURPOSE_FETCH_CONSENSUS
: kind
= "dl/consensus"; break;
2217 case DIR_PURPOSE_FETCH_CERTIFICATE
: kind
= "dl/cert"; break;
2218 case DIR_PURPOSE_FETCH_STATUS_VOTE
: kind
= "dl/vote"; break;
2219 case DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
: kind
= "dl/detached_sig";
2221 case DIR_PURPOSE_FETCH_SERVERDESC
: kind
= "dl/server"; break;
2222 case DIR_PURPOSE_FETCH_EXTRAINFO
: kind
= "dl/extra"; break;
2223 case DIR_PURPOSE_UPLOAD_DIR
: kind
= "dl/ul-dir"; break;
2224 case DIR_PURPOSE_UPLOAD_VOTE
: kind
= "dl/ul-vote"; break;
2225 case DIR_PURPOSE_UPLOAD_SIGNATURES
: kind
= "dl/ul-sig"; break;
2226 case DIR_PURPOSE_FETCH_RENDDESC
: kind
= "dl/rend"; break;
2227 case DIR_PURPOSE_FETCH_RENDDESC_V2
: kind
= "dl/rend2"; break;
2228 case DIR_PURPOSE_UPLOAD_RENDDESC
: kind
= "dl/ul-rend"; break;
2229 case DIR_PURPOSE_UPLOAD_RENDDESC_V2
: kind
= "dl/ul-rend2"; break;
2232 key
= tor_malloc(256);
2233 tor_snprintf(key
, 256, "%s%s", kind
, compressed
?".z":"");
2235 key
= tor_malloc(256);
2236 tor_snprintf(key
, 256, "unknown purpose (%d)%s",
2237 purpose
, compressed
?".z":"");
2239 note_request(key
, bytes
);
2243 /** Helper: initialize the request map to instrument downloads. */
2245 ensure_request_map_initialized(void)
2248 request_map
= strmap_new();
2251 /** Called when we just transmitted or received <b>bytes</b> worth of data
2252 * because of a request of type <b>key</b> (an arbitrary identifier): adds
2253 * <b>bytes</b> to the total associated with key. */
2255 note_request(const char *key
, size_t bytes
)
2258 ensure_request_map_initialized();
2260 r
= strmap_get(request_map
, key
);
2262 r
= tor_malloc_zero(sizeof(request_t
));
2263 strmap_set(request_map
, key
, r
);
2269 /** Return a newly allocated string holding a summary of bytes used per
2272 directory_dump_request_log(void)
2277 strmap_iter_t
*iter
;
2279 ensure_request_map_initialized();
2281 lines
= smartlist_create();
2283 for (iter
= strmap_iter_init(request_map
);
2284 !strmap_iter_done(iter
);
2285 iter
= strmap_iter_next(request_map
, iter
)) {
2289 strmap_iter_get(iter
, &key
, &val
);
2291 tor_snprintf(tmp
, sizeof(tmp
), "%s "U64_FORMAT
" "U64_FORMAT
"\n",
2292 key
, U64_PRINTF_ARG(r
->bytes
), U64_PRINTF_ARG(r
->count
));
2293 smartlist_add(lines
, tor_strdup(tmp
));
2295 smartlist_sort_strings(lines
);
2296 result
= smartlist_join_strings(lines
, "", 0, NULL
);
2297 SMARTLIST_FOREACH(lines
, char *, cp
, tor_free(cp
));
2298 smartlist_free(lines
);
2303 note_client_request(int purpose
, int compressed
, size_t bytes
)
2311 note_request(const char *key
, size_t bytes
)
2318 directory_dump_request_log(void)
2320 return tor_strdup("Not supported.");
2324 /** Decide whether a client would accept the consensus we have
2326 * Clients can say they only want a consensus if it's signed by more
2327 * than half the authorities in a list. They pass this list in
2328 * the url as "...consensus/<b>fpr</b>+<b>fpr</b>+<b>fpr</b>".
2330 * <b>fpr</b> may be an abbreviated fingerprint, i.e. only a left substring
2331 * of the full authority identity digest. (Only strings of even length,
2332 * i.e. encodings of full bytes, are handled correctly. In the case
2333 * of an odd number of hex digits the last one is silently ignored.)
2335 * Returns 1 if more than half of the requested authorities signed the
2336 * consensus, 0 otherwise.
2339 client_likes_consensus(networkstatus_t
*v
, const char *want_url
)
2341 smartlist_t
*want_authorities
= smartlist_create();
2345 dir_split_resource_into_fingerprints(want_url
, want_authorities
, NULL
, 0, 0);
2346 need_at_least
= smartlist_len(want_authorities
)/2+1;
2347 SMARTLIST_FOREACH(want_authorities
, const char *, d
, {
2348 char want_digest
[DIGEST_LEN
];
2349 size_t want_len
= strlen(d
)/2;
2350 if (want_len
> DIGEST_LEN
)
2351 want_len
= DIGEST_LEN
;
2353 if (base16_decode(want_digest
, DIGEST_LEN
, d
, want_len
*2) < 0) {
2354 log_warn(LD_DIR
,"Failed to decode requested authority digest %s.", d
);
2358 SMARTLIST_FOREACH(v
->voters
, networkstatus_voter_info_t
*, vi
, {
2359 if (vi
->signature
&&
2360 !memcmp(vi
->identity_digest
, want_digest
, want_len
)) {
2366 /* early exit, if we already have enough */
2367 if (have
>= need_at_least
)
2371 SMARTLIST_FOREACH(want_authorities
, char *, d
, tor_free(d
));
2372 smartlist_free(want_authorities
);
2373 return (have
>= need_at_least
);
2376 /** Helper function: called when a dirserver gets a complete HTTP GET
2377 * request. Look for a request for a directory or for a rendezvous
2378 * service descriptor. On finding one, write a response into
2379 * conn-\>outbuf. If the request is unrecognized, send a 400.
2380 * Always return 0. */
2382 directory_handle_command_get(dir_connection_t
*conn
, const char *headers
,
2383 const char *body
, size_t body_len
)
2386 char *url
, *url_mem
, *header
;
2387 or_options_t
*options
= get_options();
2388 time_t if_modified_since
= 0;
2392 /* We ignore the body of a GET request. */
2396 log_debug(LD_DIRSERV
,"Received GET command.");
2398 conn
->_base
.state
= DIR_CONN_STATE_SERVER_WRITING
;
2400 if (parse_http_url(headers
, &url
) < 0) {
2401 write_http_status_line(conn
, 400, "Bad request");
2404 if ((header
= http_get_header(headers
, "If-Modified-Since: "))) {
2406 if (parse_http_time(header
, &tm
) == 0) {
2407 if_modified_since
= tor_timegm(&tm
);
2409 /* The correct behavior on a malformed If-Modified-Since header is to
2410 * act as if no If-Modified-Since header had been given. */
2413 log_debug(LD_DIRSERV
,"rewritten url as '%s'.", url
);
2416 url_len
= strlen(url
);
2417 compressed
= url_len
> 2 && !strcmp(url
+url_len
-2, ".z");
2419 url
[url_len
-2] = '\0';
2423 if (!strcmp(url
,"/tor/")) {
2424 const char *frontpage
= get_dirportfrontpage();
2427 dlen
= strlen(frontpage
);
2428 /* Let's return a disclaimer page (users shouldn't use V1 anymore,
2429 and caches don't fetch '/', so this is safe). */
2431 /* [We don't check for write_bucket_low here, since we want to serve
2432 * this page no matter what.] */
2433 note_request(url
, dlen
);
2434 write_http_response_header_impl(conn
, dlen
, "text/html", "identity",
2435 NULL
, DIRPORTFRONTPAGE_CACHE_LIFETIME
);
2436 connection_write_to_buf(frontpage
, dlen
, TO_CONN(conn
));
2439 /* if no disclaimer file, fall through and continue */
2442 if (!strcmp(url
,"/tor/") || !strcmp(url
,"/tor/dir")) { /* v1 dir fetch */
2443 cached_dir_t
*d
= dirserv_get_directory();
2446 log_info(LD_DIRSERV
,"Client asked for the mirrored directory, but we "
2447 "don't have a good one yet. Sending 503 Dir not available.");
2448 write_http_status_line(conn
, 503, "Directory unavailable");
2451 if (d
->published
< if_modified_since
) {
2452 write_http_status_line(conn
, 304, "Not modified");
2456 dlen
= compressed
? d
->dir_z_len
: d
->dir_len
;
2458 if (global_write_bucket_low(TO_CONN(conn
), dlen
, 1)) {
2459 log_debug(LD_DIRSERV
,
2460 "Client asked for the mirrored directory, but we've been "
2461 "writing too many bytes lately. Sending 503 Dir busy.");
2462 write_http_status_line(conn
, 503, "Directory busy, try again later");
2466 note_request(url
, dlen
);
2468 log_debug(LD_DIRSERV
,"Dumping %sdirectory to client.",
2469 compressed
?"compressed ":"");
2470 write_http_response_header(conn
, dlen
, compressed
,
2471 FULL_DIR_CACHE_LIFETIME
);
2472 conn
->cached_dir
= d
;
2473 conn
->cached_dir_offset
= 0;
2475 conn
->zlib_state
= tor_zlib_new(0, ZLIB_METHOD
);
2478 /* Prime the connection with some data. */
2479 conn
->dir_spool_src
= DIR_SPOOL_CACHED_DIR
;
2480 connection_dirserv_flushed_some(conn
);
2484 if (!strcmp(url
,"/tor/running-routers")) { /* running-routers fetch */
2485 cached_dir_t
*d
= dirserv_get_runningrouters();
2487 write_http_status_line(conn
, 503, "Directory unavailable");
2490 if (d
->published
< if_modified_since
) {
2491 write_http_status_line(conn
, 304, "Not modified");
2494 dlen
= compressed
? d
->dir_z_len
: d
->dir_len
;
2496 if (global_write_bucket_low(TO_CONN(conn
), dlen
, 1)) {
2497 log_info(LD_DIRSERV
,
2498 "Client asked for running-routers, but we've been "
2499 "writing too many bytes lately. Sending 503 Dir busy.");
2500 write_http_status_line(conn
, 503, "Directory busy, try again later");
2503 note_request(url
, dlen
);
2504 write_http_response_header(conn
, dlen
, compressed
,
2505 RUNNINGROUTERS_CACHE_LIFETIME
);
2506 connection_write_to_buf(compressed
? d
->dir_z
: d
->dir
, dlen
,
2511 if (!strcmpstart(url
,"/tor/status/")
2512 || !strcmpstart(url
, "/tor/status-vote/current/consensus")) {
2513 /* v2 or v3 network status fetch. */
2514 smartlist_t
*dir_fps
= smartlist_create();
2515 int is_v3
= !strcmpstart(url
, "/tor/status-vote");
2516 const char *request_type
= NULL
;
2517 const char *key
= url
+ strlen("/tor/status/");
2518 long lifetime
= NETWORKSTATUS_CACHE_LIFETIME
;
2520 dirserv_get_networkstatus_v2_fingerprints(dir_fps
, key
);
2521 if (!strcmpstart(key
, "fp/"))
2522 request_type
= compressed
?"/tor/status/fp.z":"/tor/status/fp";
2523 else if (!strcmpstart(key
, "authority"))
2524 request_type
= compressed
?"/tor/status/authority.z":
2525 "/tor/status/authority";
2526 else if (!strcmpstart(key
, "all"))
2527 request_type
= compressed
?"/tor/status/all.z":"/tor/status/all";
2529 request_type
= "/tor/status/?";
2531 networkstatus_t
*v
= networkstatus_get_latest_consensus();
2532 time_t now
= time(NULL
);
2533 #define CONSENSUS_URL_PREFIX "/tor/status-vote/current/consensus/"
2535 !strcmpstart(url
, CONSENSUS_URL_PREFIX
) &&
2536 !client_likes_consensus(v
, url
+ strlen(CONSENSUS_URL_PREFIX
))) {
2537 write_http_status_line(conn
, 404, "Consensus not signed by sufficient "
2538 "number of requested authorities");
2539 smartlist_free(dir_fps
);
2543 smartlist_add(dir_fps
, tor_memdup("\0\0\0\0\0\0\0\0\0\0"
2544 "\0\0\0\0\0\0\0\0\0\0", 20));
2545 request_type
= compressed
?"v3.z":"v3";
2546 lifetime
= (v
&& v
->fresh_until
> now
) ? v
->fresh_until
- now
: 0;
2549 if (!smartlist_len(dir_fps
)) { /* we failed to create/cache cp */
2550 write_http_status_line(conn
, 503, "Network status object unavailable");
2551 smartlist_free(dir_fps
);
2555 if (!dirserv_remove_old_statuses(dir_fps
, if_modified_since
)) {
2556 write_http_status_line(conn
, 404, "Not found");
2557 SMARTLIST_FOREACH(dir_fps
, char *, cp
, tor_free(cp
));
2558 smartlist_free(dir_fps
);
2560 } else if (!smartlist_len(dir_fps
)) {
2561 write_http_status_line(conn
, 304, "Not modified");
2562 SMARTLIST_FOREACH(dir_fps
, char *, cp
, tor_free(cp
));
2563 smartlist_free(dir_fps
);
2567 dlen
= dirserv_estimate_data_size(dir_fps
, 0, compressed
);
2568 if (global_write_bucket_low(TO_CONN(conn
), dlen
, 2)) {
2569 log_debug(LD_DIRSERV
,
2570 "Client asked for network status lists, but we've been "
2571 "writing too many bytes lately. Sending 503 Dir busy.");
2572 write_http_status_line(conn
, 503, "Directory busy, try again later");
2573 SMARTLIST_FOREACH(dir_fps
, char *, fp
, tor_free(fp
));
2574 smartlist_free(dir_fps
);
2578 #ifdef ENABLE_GEOIP_STATS
2580 geoip_client_action_t act
=
2581 is_v3
? GEOIP_CLIENT_NETWORKSTATUS
: GEOIP_CLIENT_NETWORKSTATUS_V2
;
2583 if (tor_inet_aton((TO_CONN(conn
))->address
, &in
))
2584 geoip_note_client_seen(act
, ntohl(in
.s_addr
), time(NULL
));
2588 // note_request(request_type,dlen);
2589 (void) request_type
;
2590 write_http_response_header(conn
, -1, compressed
,
2591 smartlist_len(dir_fps
) == 1 ? lifetime
: 0);
2592 conn
->fingerprint_stack
= dir_fps
;
2594 conn
->zlib_state
= tor_zlib_new(0, ZLIB_METHOD
);
2596 /* Prime the connection with some data. */
2597 conn
->dir_spool_src
= DIR_SPOOL_NETWORKSTATUS
;
2598 connection_dirserv_flushed_some(conn
);
2602 if (!strcmpstart(url
,"/tor/status-vote/current/") ||
2603 !strcmpstart(url
,"/tor/status-vote/next/")) {
2604 /* XXXX If-modified-since is only implemented for the current
2605 * consensus: that's probably fine, since it's the only vote document
2606 * people fetch much. */
2608 ssize_t body_len
= 0;
2609 ssize_t estimated_len
= 0;
2610 smartlist_t
*items
= smartlist_create();
2611 smartlist_t
*dir_items
= smartlist_create();
2612 int lifetime
= 60; /* XXXX022 should actually use vote intervals. */
2613 url
+= strlen("/tor/status-vote/");
2614 current
= !strcmpstart(url
, "current/");
2615 url
= strchr(url
, '/');
2618 if (!strcmp(url
, "consensus")) {
2620 tor_assert(!current
); /* we handle current consensus specially above,
2621 * since it wants to be spooled. */
2622 if ((item
= dirvote_get_pending_consensus()))
2623 smartlist_add(items
, (char*)item
);
2624 } else if (!current
&& !strcmp(url
, "consensus-signatures")) {
2625 /* XXXX the spec says that we should implement
2626 * current/consensus-signatures too. It doesn't seem to be needed,
2629 if ((item
=dirvote_get_pending_detached_signatures()))
2630 smartlist_add(items
, (char*)item
);
2631 } else if (!strcmp(url
, "authority")) {
2632 const cached_dir_t
*d
;
2633 int flags
= DGV_BY_ID
|
2634 (current
? DGV_INCLUDE_PREVIOUS
: DGV_INCLUDE_PENDING
);
2635 if ((d
=dirvote_get_vote(NULL
, flags
)))
2636 smartlist_add(dir_items
, (cached_dir_t
*)d
);
2638 const cached_dir_t
*d
;
2639 smartlist_t
*fps
= smartlist_create();
2641 if (!strcmpstart(url
, "d/")) {
2643 flags
= DGV_INCLUDE_PENDING
| DGV_INCLUDE_PREVIOUS
;
2646 (current
? DGV_INCLUDE_PREVIOUS
: DGV_INCLUDE_PENDING
);
2648 dir_split_resource_into_fingerprints(url
, fps
, NULL
, 1, 1);
2649 SMARTLIST_FOREACH(fps
, char *, fp
, {
2650 if ((d
= dirvote_get_vote(fp
, flags
)))
2651 smartlist_add(dir_items
, (cached_dir_t
*)d
);
2654 smartlist_free(fps
);
2656 if (!smartlist_len(dir_items
) && !smartlist_len(items
)) {
2657 write_http_status_line(conn
, 404, "Not found");
2660 SMARTLIST_FOREACH(dir_items
, cached_dir_t
*, d
,
2661 body_len
+= compressed
? d
->dir_z_len
: d
->dir_len
);
2662 estimated_len
+= body_len
;
2663 SMARTLIST_FOREACH(items
, const char *, item
, {
2664 size_t ln
= strlen(item
);
2666 estimated_len
+= ln
/2;
2668 body_len
+= ln
; estimated_len
+= ln
;
2672 if (global_write_bucket_low(TO_CONN(conn
), estimated_len
, 2)) {
2673 write_http_status_line(conn
, 503, "Directory busy, try again later.");
2676 write_http_response_header(conn
, body_len
? body_len
: -1, compressed
,
2679 if (smartlist_len(items
)) {
2681 conn
->zlib_state
= tor_zlib_new(1, ZLIB_METHOD
);
2682 SMARTLIST_FOREACH(items
, const char *, c
,
2683 connection_write_to_buf_zlib(c
, strlen(c
), conn
, 0));
2684 connection_write_to_buf_zlib("", 0, conn
, 1);
2686 SMARTLIST_FOREACH(items
, const char *, c
,
2687 connection_write_to_buf(c
, strlen(c
), TO_CONN(conn
)));
2690 SMARTLIST_FOREACH(dir_items
, cached_dir_t
*, d
,
2691 connection_write_to_buf(compressed
? d
->dir_z
: d
->dir
,
2692 compressed
? d
->dir_z_len
: d
->dir_len
,
2696 smartlist_free(items
);
2697 smartlist_free(dir_items
);
2701 if (!strcmpstart(url
,"/tor/server/") ||
2702 (!options
->BridgeAuthoritativeDir
&&
2703 !options
->BridgeRelay
&& !strcmpstart(url
,"/tor/extra/"))) {
2706 const char *request_type
= NULL
;
2707 int cache_lifetime
= 0;
2708 int is_extra
= !strcmpstart(url
,"/tor/extra/");
2709 url
+= is_extra
? strlen("/tor/extra/") : strlen("/tor/server/");
2710 conn
->fingerprint_stack
= smartlist_create();
2711 res
= dirserv_get_routerdesc_fingerprints(conn
->fingerprint_stack
, url
,
2713 !connection_dir_is_encrypted(conn
),
2716 if (!strcmpstart(url
, "fp/")) {
2717 request_type
= compressed
?"/tor/server/fp.z":"/tor/server/fp";
2718 if (smartlist_len(conn
->fingerprint_stack
) == 1)
2719 cache_lifetime
= ROUTERDESC_CACHE_LIFETIME
;
2720 } else if (!strcmpstart(url
, "authority")) {
2721 request_type
= compressed
?"/tor/server/authority.z":
2722 "/tor/server/authority";
2723 cache_lifetime
= ROUTERDESC_CACHE_LIFETIME
;
2724 } else if (!strcmpstart(url
, "all")) {
2725 request_type
= compressed
?"/tor/server/all.z":"/tor/server/all";
2726 cache_lifetime
= FULL_DIR_CACHE_LIFETIME
;
2727 } else if (!strcmpstart(url
, "d/")) {
2728 request_type
= compressed
?"/tor/server/d.z":"/tor/server/d";
2729 if (smartlist_len(conn
->fingerprint_stack
) == 1)
2730 cache_lifetime
= ROUTERDESC_BY_DIGEST_CACHE_LIFETIME
;
2732 request_type
= "/tor/server/?";
2734 (void) request_type
; /* usable for note_request. */
2735 if (!strcmpstart(url
, "d/"))
2736 conn
->dir_spool_src
=
2737 is_extra
? DIR_SPOOL_EXTRA_BY_DIGEST
: DIR_SPOOL_SERVER_BY_DIGEST
;
2739 conn
->dir_spool_src
=
2740 is_extra
? DIR_SPOOL_EXTRA_BY_FP
: DIR_SPOOL_SERVER_BY_FP
;
2742 if (!dirserv_have_any_serverdesc(conn
->fingerprint_stack
,
2743 conn
->dir_spool_src
)) {
2749 write_http_status_line(conn
, 404, msg
);
2751 dlen
= dirserv_estimate_data_size(conn
->fingerprint_stack
,
2753 if (global_write_bucket_low(TO_CONN(conn
), dlen
, 2)) {
2754 log_info(LD_DIRSERV
,
2755 "Client asked for server descriptors, but we've been "
2756 "writing too many bytes lately. Sending 503 Dir busy.");
2757 write_http_status_line(conn
, 503, "Directory busy, try again later");
2758 conn
->dir_spool_src
= DIR_SPOOL_NONE
;
2761 write_http_response_header(conn
, -1, compressed
, cache_lifetime
);
2763 conn
->zlib_state
= tor_zlib_new(1, ZLIB_METHOD
);
2764 /* Prime the connection with some data. */
2765 connection_dirserv_flushed_some(conn
);
2770 if (!strcmpstart(url
,"/tor/keys/")) {
2771 smartlist_t
*certs
= smartlist_create();
2773 if (!strcmp(url
, "/tor/keys/all")) {
2774 authority_cert_get_all(certs
);
2775 } else if (!strcmp(url
, "/tor/keys/authority")) {
2776 authority_cert_t
*cert
= get_my_v3_authority_cert();
2778 smartlist_add(certs
, cert
);
2779 } else if (!strcmpstart(url
, "/tor/keys/fp/")) {
2780 smartlist_t
*fps
= smartlist_create();
2781 dir_split_resource_into_fingerprints(url
+strlen("/tor/keys/fp/"),
2783 SMARTLIST_FOREACH(fps
, char *, d
, {
2784 authority_cert_t
*c
= authority_cert_get_newest_by_id(d
);
2785 if (c
) smartlist_add(certs
, c
);
2788 smartlist_free(fps
);
2789 } else if (!strcmpstart(url
, "/tor/keys/sk/")) {
2790 smartlist_t
*fps
= smartlist_create();
2791 dir_split_resource_into_fingerprints(url
+strlen("/tor/keys/sk/"),
2793 SMARTLIST_FOREACH(fps
, char *, d
, {
2794 authority_cert_t
*c
= authority_cert_get_by_sk_digest(d
);
2795 if (c
) smartlist_add(certs
, c
);
2798 smartlist_free(fps
);
2799 } else if (!strcmpstart(url
, "/tor/keys/fp-sk/")) {
2800 smartlist_t
*fp_sks
= smartlist_create();
2801 dir_split_resource_into_fingerprint_pairs(url
+strlen("/tor/keys/fp-sk/"),
2803 SMARTLIST_FOREACH(fp_sks
, fp_pair_t
*, pair
, {
2804 authority_cert_t
*c
= authority_cert_get_by_digests(pair
->first
,
2806 if (c
) smartlist_add(certs
, c
);
2809 smartlist_free(fp_sks
);
2811 write_http_status_line(conn
, 400, "Bad request");
2814 if (!smartlist_len(certs
)) {
2815 write_http_status_line(conn
, 404, "Not found");
2818 SMARTLIST_FOREACH(certs
, authority_cert_t
*, c
,
2819 if (c
->cache_info
.published_on
< if_modified_since
)
2820 SMARTLIST_DEL_CURRENT(certs
, c
));
2821 if (!smartlist_len(certs
)) {
2822 write_http_status_line(conn
, 304, "Not modified");
2826 SMARTLIST_FOREACH(certs
, authority_cert_t
*, c
,
2827 len
+= c
->cache_info
.signed_descriptor_len
);
2829 if (global_write_bucket_low(TO_CONN(conn
), compressed
?len
/2:len
, 2)) {
2830 write_http_status_line(conn
, 503, "Directory busy, try again later.");
2834 write_http_response_header(conn
, compressed
?-1:len
, compressed
, 60*60);
2836 conn
->zlib_state
= tor_zlib_new(1, ZLIB_METHOD
);
2837 SMARTLIST_FOREACH(certs
, authority_cert_t
*, c
,
2838 connection_write_to_buf_zlib(c
->cache_info
.signed_descriptor_body
,
2839 c
->cache_info
.signed_descriptor_len
,
2841 connection_write_to_buf_zlib("", 0, conn
, 1);
2843 SMARTLIST_FOREACH(certs
, authority_cert_t
*, c
,
2844 connection_write_to_buf(c
->cache_info
.signed_descriptor_body
,
2845 c
->cache_info
.signed_descriptor_len
,
2849 smartlist_free(certs
);
2853 if (options
->HidServDirectoryV2
&&
2854 !strcmpstart(url
,"/tor/rendezvous2/")) {
2855 /* Handle v2 rendezvous descriptor fetch request. */
2857 const char *query
= url
+ strlen("/tor/rendezvous2/");
2858 if (strlen(query
) == REND_DESC_ID_V2_LEN_BASE32
) {
2859 log_info(LD_REND
, "Got a v2 rendezvous descriptor request for ID '%s'",
2861 switch (rend_cache_lookup_v2_desc_as_dir(query
, &descp
)) {
2863 write_http_response_header(conn
, strlen(descp
), 0, 0);
2864 connection_write_to_buf(descp
, strlen(descp
), TO_CONN(conn
));
2866 case 0: /* well-formed but not present */
2867 write_http_status_line(conn
, 404, "Not found");
2869 case -1: /* not well-formed */
2870 write_http_status_line(conn
, 400, "Bad request");
2873 } else { /* not well-formed */
2874 write_http_status_line(conn
, 400, "Bad request");
2879 if (options
->HSAuthoritativeDir
&& !strcmpstart(url
,"/tor/rendezvous/")) {
2880 /* rendezvous descriptor fetch */
2883 const char *query
= url
+strlen("/tor/rendezvous/");
2885 log_info(LD_REND
, "Handling rendezvous descriptor get");
2886 switch (rend_cache_lookup_desc(query
, 0, &descp
, &desc_len
)) {
2888 write_http_response_header_impl(conn
, desc_len
,
2889 "application/octet-stream",
2891 note_request("/tor/rendezvous?/", desc_len
);
2892 /* need to send descp separately, because it may include NULs */
2893 connection_write_to_buf(descp
, desc_len
, TO_CONN(conn
));
2894 /* report successful fetch to statistic */
2895 if (options
->HSAuthorityRecordStats
) {
2896 hs_usage_note_fetch_total(query
, time(NULL
));
2897 hs_usage_note_fetch_successful(query
, time(NULL
));
2900 case 0: /* well-formed but not present */
2901 write_http_status_line(conn
, 404, "Not found");
2902 /* report (unsuccessful) fetch to statistic */
2903 if (options
->HSAuthorityRecordStats
) {
2904 hs_usage_note_fetch_total(query
, time(NULL
));
2907 case -1: /* not well-formed */
2908 write_http_status_line(conn
, 400, "Bad request");
2914 if (options
->BridgeAuthoritativeDir
&&
2915 options
->BridgePassword
&&
2916 connection_dir_is_encrypted(conn
) &&
2917 !strcmp(url
,"/tor/networkstatus-bridges")) {
2919 char *secret
= alloc_http_authenticator(options
->BridgePassword
);
2921 header
= http_get_header(headers
, "Authorization: Basic ");
2923 /* now make sure the password is there and right */
2924 if (!header
|| strcmp(header
, secret
)) {
2925 write_http_status_line(conn
, 404, "Not found");
2933 /* all happy now. send an answer. */
2934 status
= networkstatus_getinfo_by_purpose("bridge", time(NULL
));
2935 dlen
= strlen(status
);
2936 write_http_response_header(conn
, dlen
, 0, 0);
2937 connection_write_to_buf(status
, dlen
, TO_CONN(conn
));
2942 if (!strcmpstart(url
,"/tor/bytes.txt")) {
2943 char *bytes
= directory_dump_request_log();
2944 size_t len
= strlen(bytes
);
2945 write_http_response_header(conn
, len
, 0, 0);
2946 connection_write_to_buf(bytes
, len
, TO_CONN(conn
));
2951 if (!strcmp(url
,"/tor/robots.txt")) { /* /robots.txt will have been
2952 rewritten to /tor/robots.txt */
2953 char robots
[] = "User-agent: *\r\nDisallow: /\r\n";
2954 size_t len
= strlen(robots
);
2955 write_http_response_header(conn
, len
, 0, ROBOTS_CACHE_LIFETIME
);
2956 connection_write_to_buf(robots
, len
, TO_CONN(conn
));
2960 if (!strcmp(url
,"/tor/dbg-stability.txt")) {
2961 const char *stability
;
2963 if (options
->BridgeAuthoritativeDir
||
2964 ! authdir_mode_tests_reachability(options
) ||
2965 ! (stability
= rep_hist_get_router_stability_doc(time(NULL
)))) {
2966 write_http_status_line(conn
, 404, "Not found.");
2970 len
= strlen(stability
);
2971 write_http_response_header(conn
, len
, 0, 0);
2972 connection_write_to_buf(stability
, len
, TO_CONN(conn
));
2976 #if defined(EXPORTMALLINFO) && defined(HAVE_MALLOC_H) && defined(HAVE_MALLINFO)
2977 #define ADD_MALLINFO_LINE(x) do { \
2978 tor_snprintf(tmp, sizeof(tmp), "%s %d\n", #x, mi.x); \
2979 smartlist_add(lines, tor_strdup(tmp)); \
2982 if (!strcmp(url
,"/tor/mallinfo.txt") &&
2983 (tor_addr_eq_ipv4h(&conn
->_base
.addr
, 0x7f000001ul
))) {
2990 memset(&mi
, 0, sizeof(mi
));
2992 lines
= smartlist_create();
2994 ADD_MALLINFO_LINE(arena
)
2995 ADD_MALLINFO_LINE(ordblks
)
2996 ADD_MALLINFO_LINE(smblks
)
2997 ADD_MALLINFO_LINE(hblks
)
2998 ADD_MALLINFO_LINE(hblkhd
)
2999 ADD_MALLINFO_LINE(usmblks
)
3000 ADD_MALLINFO_LINE(fsmblks
)
3001 ADD_MALLINFO_LINE(uordblks
)
3002 ADD_MALLINFO_LINE(fordblks
)
3003 ADD_MALLINFO_LINE(keepcost
)
3005 result
= smartlist_join_strings(lines
, "", 0, NULL
);
3006 SMARTLIST_FOREACH(lines
, char *, cp
, tor_free(cp
));
3007 smartlist_free(lines
);
3009 len
= strlen(result
);
3010 write_http_response_header(conn
, len
, 0, 0);
3011 connection_write_to_buf(result
, len
, TO_CONN(conn
));
3017 /* we didn't recognize the url */
3018 write_http_status_line(conn
, 404, "Not found");
3025 /** Helper function: called when a dirserver gets a complete HTTP POST
3026 * request. Look for an uploaded server descriptor or rendezvous
3027 * service descriptor. On finding one, process it and write a
3028 * response into conn-\>outbuf. If the request is unrecognized, send a
3029 * 400. Always return 0. */
3031 directory_handle_command_post(dir_connection_t
*conn
, const char *headers
,
3032 const char *body
, size_t body_len
)
3035 or_options_t
*options
= get_options();
3037 log_debug(LD_DIRSERV
,"Received POST command.");
3039 conn
->_base
.state
= DIR_CONN_STATE_SERVER_WRITING
;
3041 if (parse_http_url(headers
, &url
) < 0) {
3042 write_http_status_line(conn
, 400, "Bad request");
3045 log_debug(LD_DIRSERV
,"rewritten url as '%s'.", url
);
3047 /* Handle v2 rendezvous service publish request. */
3048 if (options
->HidServDirectoryV2
&&
3049 !strcmpstart(url
,"/tor/rendezvous2/publish")) {
3050 switch (rend_cache_store_v2_desc_as_dir(body
)) {
3052 log_info(LD_REND
, "Rejected v2 rend descriptor (length %d) from %s "
3053 "since we're not currently a hidden service directory.",
3054 (int)body_len
, conn
->_base
.address
);
3055 write_http_status_line(conn
, 503, "Currently not acting as v2 "
3056 "hidden service directory");
3059 log_warn(LD_REND
, "Rejected v2 rend descriptor (length %d) from %s.",
3060 (int)body_len
, conn
->_base
.address
);
3061 write_http_status_line(conn
, 400,
3062 "Invalid v2 service descriptor rejected");
3065 write_http_status_line(conn
, 200, "Service descriptor (v2) stored");
3066 log_info(LD_REND
, "Handled v2 rendezvous descriptor post: accepted");
3071 if (!authdir_mode(options
)) {
3072 /* we just provide cached directories; we don't want to
3073 * receive anything. */
3074 write_http_status_line(conn
, 400, "Nonauthoritative directory does not "
3075 "accept posted server descriptors");
3079 if (authdir_mode_handles_descs(options
, -1) &&
3080 !strcmp(url
,"/tor/")) { /* server descriptor post */
3081 const char *msg
= "[None]";
3082 uint8_t purpose
= authdir_mode_bridge(options
) ?
3083 ROUTER_PURPOSE_BRIDGE
: ROUTER_PURPOSE_GENERAL
;
3084 was_router_added_t r
= dirserv_add_multiple_descriptors(body
, purpose
,
3085 conn
->_base
.address
, &msg
);
3087 if (WRA_WAS_ADDED(r
))
3088 dirserv_get_directory(); /* rebuild and write to disk */
3090 if (r
== ROUTER_ADDED_NOTIFY_GENERATOR
) {
3091 /* Accepted with a message. */
3092 log_info(LD_DIRSERV
,
3093 "Problematic router descriptor or extra-info from %s "
3095 conn
->_base
.address
, msg
);
3096 write_http_status_line(conn
, 400, msg
);
3097 } else if (r
== ROUTER_ADDED_SUCCESSFULLY
) {
3098 write_http_status_line(conn
, 200, msg
);
3099 } else if (WRA_WAS_OUTDATED(r
)) {
3100 write_http_response_header_impl(conn
, -1, NULL
, NULL
,
3101 "X-Descriptor-Not-New: Yes\r\n", -1);
3103 log_info(LD_DIRSERV
,
3104 "Rejected router descriptor or extra-info from %s "
3106 conn
->_base
.address
, msg
);
3107 write_http_status_line(conn
, 400, msg
);
3112 if (options
->HSAuthoritativeDir
&&
3113 !strcmpstart(url
,"/tor/rendezvous/publish")) {
3114 /* rendezvous descriptor post */
3115 log_info(LD_REND
, "Handling rendezvous descriptor post.");
3116 if (rend_cache_store(body
, body_len
, 1) < 0) {
3117 log_fn(LOG_PROTOCOL_WARN
, LD_DIRSERV
,
3118 "Rejected rend descriptor (length %d) from %s.",
3119 (int)body_len
, conn
->_base
.address
);
3120 write_http_status_line(conn
, 400,
3121 "Invalid v0 service descriptor rejected");
3123 write_http_status_line(conn
, 200, "Service descriptor (v0) stored");
3128 if (authdir_mode_v3(options
) &&
3129 !strcmp(url
,"/tor/post/vote")) { /* v3 networkstatus vote */
3130 const char *msg
= "OK";
3132 if (dirvote_add_vote(body
, &msg
, &status
)) {
3133 write_http_status_line(conn
, status
, "Vote stored");
3136 write_http_status_line(conn
, status
, msg
);
3141 if (authdir_mode_v3(options
) &&
3142 !strcmp(url
,"/tor/post/consensus-signature")) { /* sigs on consensus. */
3143 const char *msg
= NULL
;
3144 if (dirvote_add_signatures(body
, conn
->_base
.address
, &msg
)>=0) {
3145 write_http_status_line(conn
, 200, msg
?msg
:"Signatures stored");
3147 log_warn(LD_DIR
, "Unable to store signatures posted by %s: %s",
3148 conn
->_base
.address
, msg
?msg
:"???");
3149 write_http_status_line(conn
, 400, msg
?msg
:"Unable to store signatures");
3154 /* we didn't recognize the url */
3155 write_http_status_line(conn
, 404, "Not found");
3162 /** Called when a dirserver receives data on a directory connection;
3163 * looks for an HTTP request. If the request is complete, remove it
3164 * from the inbuf, try to process it; otherwise, leave it on the
3165 * buffer. Return a 0 on success, or -1 on error.
3168 directory_handle_command(dir_connection_t
*conn
)
3170 char *headers
=NULL
, *body
=NULL
;
3175 tor_assert(conn
->_base
.type
== CONN_TYPE_DIR
);
3177 switch (fetch_from_buf_http(conn
->_base
.inbuf
,
3178 &headers
, MAX_HEADERS_SIZE
,
3179 &body
, &body_len
, MAX_DIR_UL_SIZE
, 0)) {
3180 case -1: /* overflow */
3181 log_warn(LD_DIRSERV
,
3182 "Invalid input from address '%s'. Closing.",
3183 conn
->_base
.address
);
3186 log_debug(LD_DIRSERV
,"command not all here yet.");
3188 /* case 1, fall through */
3191 http_set_address_origin(headers
, TO_CONN(conn
));
3192 //log_debug(LD_DIRSERV,"headers %s, body %s.", headers, body);
3194 if (!strncasecmp(headers
,"GET",3))
3195 r
= directory_handle_command_get(conn
, headers
, body
, body_len
);
3196 else if (!strncasecmp(headers
,"POST",4))
3197 r
= directory_handle_command_post(conn
, headers
, body
, body_len
);
3199 log_fn(LOG_PROTOCOL_WARN
, LD_PROTOCOL
,
3200 "Got headers %s with unknown command. Closing.",
3205 tor_free(headers
); tor_free(body
);
3209 /** Write handler for directory connections; called when all data has
3210 * been flushed. Close the connection or wait for a response as
3214 connection_dir_finished_flushing(dir_connection_t
*conn
)
3217 tor_assert(conn
->_base
.type
== CONN_TYPE_DIR
);
3219 switch (conn
->_base
.state
) {
3220 case DIR_CONN_STATE_CLIENT_SENDING
:
3221 log_debug(LD_DIR
,"client finished sending command.");
3222 conn
->_base
.state
= DIR_CONN_STATE_CLIENT_READING
;
3223 connection_stop_writing(TO_CONN(conn
));
3225 case DIR_CONN_STATE_SERVER_WRITING
:
3226 log_debug(LD_DIRSERV
,"Finished writing server response. Closing.");
3227 connection_mark_for_close(TO_CONN(conn
));
3230 log_warn(LD_BUG
,"called in unexpected state %d.",
3232 tor_fragile_assert();
3238 /** Connected handler for directory connections: begin sending data to the
3241 connection_dir_finished_connecting(dir_connection_t
*conn
)
3244 tor_assert(conn
->_base
.type
== CONN_TYPE_DIR
);
3245 tor_assert(conn
->_base
.state
== DIR_CONN_STATE_CONNECTING
);
3247 log_debug(LD_HTTP
,"Dir connection to router %s:%u established.",
3248 conn
->_base
.address
,conn
->_base
.port
);
3250 conn
->_base
.state
= DIR_CONN_STATE_CLIENT_SENDING
; /* start flushing conn */
3254 /** Called when one or more networkstatus fetches have failed (with uppercase
3255 * fingerprints listed in <b>failed</b>). Mark those fingerprints as having
3256 * failed once, unless they failed with status code 503. */
3258 dir_networkstatus_download_failed(smartlist_t
*failed
, int status_code
)
3260 if (status_code
== 503)
3262 SMARTLIST_FOREACH(failed
, const char *, fp
,
3264 char digest
[DIGEST_LEN
];
3265 trusted_dir_server_t
*dir
;
3266 if (base16_decode(digest
, DIGEST_LEN
, fp
, strlen(fp
))<0) {
3267 log_warn(LD_BUG
, "Called with bad fingerprint in list: %s",
3271 dir
= router_get_trusteddirserver_by_digest(digest
);
3274 download_status_failed(&dir
->v2_ns_dl_status
, status_code
);
3278 /** Schedule for when servers should download things in general. */
3279 static const int server_dl_schedule
[] = {
3280 0, 0, 0, 60, 60, 60*2, 60*5, 60*15, INT_MAX
3282 /** Schedule for when clients should download things in general. */
3283 static const int client_dl_schedule
[] = {
3284 0, 0, 60, 60*5, 60*10, INT_MAX
3286 /** Schedule for when servers should download consensuses. */
3287 static const int server_consensus_dl_schedule
[] = {
3288 0, 0, 60, 60*5, 60*10, 60*30, 60*30, 60*30, 60*30, 60*30, 60*60, 60*60*2
3290 /** Schedule for when clients should download consensuses. */
3291 static const int client_consensus_dl_schedule
[] = {
3292 0, 0, 60, 60*5, 60*10, 60*30, 60*60, 60*60, 60*60, 60*60*3, 60*60*6, 60*60*12
3294 /** Schedule for when clients should download bridge descriptors. */
3295 static const int bridge_dl_schedule
[] = {
3296 60*60, 15*60, 15*60, 60*60
3299 /** Decide which download schedule we want to use, and then return a
3300 * pointer to it along with a pointer to its length. Helper function for
3301 * download_status_increment_failure() and download_status_reset(). */
3303 find_dl_schedule_and_len(download_status_t
*dls
, int server
,
3304 const int **schedule
, size_t *schedule_len
)
3306 switch (dls
->schedule
) {
3307 case DL_SCHED_GENERIC
:
3309 *schedule
= server_dl_schedule
;
3310 *schedule_len
= sizeof(server_dl_schedule
)/sizeof(int);
3312 *schedule
= client_dl_schedule
;
3313 *schedule_len
= sizeof(client_dl_schedule
)/sizeof(int);
3316 case DL_SCHED_CONSENSUS
:
3318 *schedule
= server_consensus_dl_schedule
;
3319 *schedule_len
= sizeof(server_consensus_dl_schedule
)/sizeof(int);
3321 *schedule
= client_consensus_dl_schedule
;
3322 *schedule_len
= sizeof(client_consensus_dl_schedule
)/sizeof(int);
3325 case DL_SCHED_BRIDGE
:
3326 *schedule
= bridge_dl_schedule
;
3327 *schedule_len
= sizeof(bridge_dl_schedule
)/sizeof(int);
3334 /** Called when an attempt to download <b>dls</b> has failed with HTTP status
3335 * <b>status_code</b>. Increment the failure count (if the code indicates a
3336 * real failure) and set <b>dls</b>-\>next_attempt_at to an appropriate time
3339 download_status_increment_failure(download_status_t
*dls
, int status_code
,
3340 const char *item
, int server
, time_t now
)
3342 const int *schedule
;
3343 size_t schedule_len
;
3346 if (status_code
!= 503 || server
) {
3347 if (dls
->n_download_failures
< IMPOSSIBLE_TO_DOWNLOAD
-1)
3348 ++dls
->n_download_failures
;
3351 find_dl_schedule_and_len(dls
, server
, &schedule
, &schedule_len
);
3353 if (dls
->n_download_failures
< schedule_len
)
3354 increment
= schedule
[dls
->n_download_failures
];
3355 else if (dls
->n_download_failures
== IMPOSSIBLE_TO_DOWNLOAD
)
3356 increment
= INT_MAX
;
3358 increment
= schedule
[schedule_len
-1];
3360 if (increment
< INT_MAX
)
3361 dls
->next_attempt_at
= now
+increment
;
3363 dls
->next_attempt_at
= TIME_MAX
;
3367 log_debug(LD_DIR
, "%s failed %d time(s); I'll try again immediately.",
3368 item
, (int)dls
->n_download_failures
);
3369 else if (dls
->next_attempt_at
< TIME_MAX
)
3370 log_debug(LD_DIR
, "%s failed %d time(s); I'll try again in %d seconds.",
3371 item
, (int)dls
->n_download_failures
,
3372 (int)(dls
->next_attempt_at
-now
));
3374 log_debug(LD_DIR
, "%s failed %d time(s); Giving up for a while.",
3375 item
, (int)dls
->n_download_failures
);
3377 return dls
->next_attempt_at
;
3380 /** Reset <b>dls</b> so that it will be considered downloadable
3381 * immediately, and/or to show that we don't need it anymore.
3383 * (We find the zeroth element of the download schedule, and set
3384 * next_attempt_at to be the appropriate offset from 'now'. In most
3385 * cases this means setting it to 'now', so the item will be immediately
3386 * downloadable; in the case of bridge descriptors, the zeroth element
3387 * is an hour from now.) */
3389 download_status_reset(download_status_t
*dls
)
3391 const int *schedule
;
3392 size_t schedule_len
;
3394 find_dl_schedule_and_len(dls
, get_options()->DirPort
,
3395 &schedule
, &schedule_len
);
3397 dls
->n_download_failures
= 0;
3398 dls
->next_attempt_at
= time(NULL
) + schedule
[0];
3401 /** Called when one or more routerdesc (or extrainfo, if <b>was_extrainfo</b>)
3402 * fetches have failed (with uppercase fingerprints listed in <b>failed</b>,
3403 * either as descriptor digests or as identity digests based on
3404 * <b>was_descriptor_digests</b>).
3407 dir_routerdesc_download_failed(smartlist_t
*failed
, int status_code
,
3409 int was_extrainfo
, int was_descriptor_digests
)
3411 char digest
[DIGEST_LEN
];
3412 time_t now
= time(NULL
);
3413 int server
= directory_fetches_from_authorities(get_options());
3414 if (!was_descriptor_digests
) {
3415 if (router_purpose
== ROUTER_PURPOSE_BRIDGE
) {
3416 tor_assert(!was_extrainfo
); /* not supported yet */
3417 SMARTLIST_FOREACH(failed
, const char *, cp
,
3419 if (base16_decode(digest
, DIGEST_LEN
, cp
, strlen(cp
))<0) {
3420 log_warn(LD_BUG
, "Malformed fingerprint in list: %s",
3424 retry_bridge_descriptor_fetch_directly(digest
);
3427 return; /* FFFF should implement for other-than-router-purpose someday */
3429 SMARTLIST_FOREACH(failed
, const char *, cp
,
3431 download_status_t
*dls
= NULL
;
3432 if (base16_decode(digest
, DIGEST_LEN
, cp
, strlen(cp
)) < 0) {
3433 log_warn(LD_BUG
, "Malformed fingerprint in list: %s", escaped(cp
));
3436 if (was_extrainfo
) {
3437 signed_descriptor_t
*sd
=
3438 router_get_by_extrainfo_digest(digest
);
3440 dls
= &sd
->ei_dl_status
;
3442 dls
= router_get_dl_status_by_descriptor_digest(digest
);
3444 if (!dls
|| dls
->n_download_failures
>= MAX_ROUTERDESC_DOWNLOAD_FAILURES
)
3446 download_status_increment_failure(dls
, status_code
, cp
, server
, now
);
3449 /* No need to relaunch descriptor downloads here: we already do it
3450 * every 10 or 60 seconds (FOO_DESCRIPTOR_RETRY_INTERVAL) in main.c. */
3453 /** Helper. Compare two fp_pair_t objects, and return -1, 0, or 1 as
3456 _compare_pairs(const void **a
, const void **b
)
3458 const fp_pair_t
*fp1
= *a
, *fp2
= *b
;
3460 if ((r
= memcmp(fp1
->first
, fp2
->first
, DIGEST_LEN
)))
3463 return memcmp(fp1
->second
, fp2
->second
, DIGEST_LEN
);
3466 /** Divide a string <b>res</b> of the form FP1-FP2+FP3-FP4...[.z], where each
3467 * FP is a hex-encoded fingerprint, into a sequence of distinct sorted
3468 * fp_pair_t. Skip malformed pairs. On success, return 0 and add those
3469 * fp_pair_t into <b>pairs_out</b>. On failure, return -1. */
3471 dir_split_resource_into_fingerprint_pairs(const char *res
,
3472 smartlist_t
*pairs_out
)
3474 smartlist_t
*pairs_tmp
= smartlist_create();
3475 smartlist_t
*pairs_result
= smartlist_create();
3477 smartlist_split_string(pairs_tmp
, res
, "+", 0, 0);
3478 if (smartlist_len(pairs_tmp
)) {
3479 char *last
= smartlist_get(pairs_tmp
,smartlist_len(pairs_tmp
)-1);
3480 size_t last_len
= strlen(last
);
3481 if (last_len
> 2 && !strcmp(last
+last_len
-2, ".z")) {
3482 last
[last_len
-2] = '\0';
3485 SMARTLIST_FOREACH_BEGIN(pairs_tmp
, char *, cp
) {
3486 if (strlen(cp
) != HEX_DIGEST_LEN
*2+1) {
3488 "Skipping digest pair %s with non-standard length.", escaped(cp
));
3489 } else if (cp
[HEX_DIGEST_LEN
] != '-') {
3491 "Skipping digest pair %s with missing dash.", escaped(cp
));
3494 if (base16_decode(pair
.first
, DIGEST_LEN
, cp
, HEX_DIGEST_LEN
)<0 ||
3495 base16_decode(pair
.second
,
3496 DIGEST_LEN
, cp
+HEX_DIGEST_LEN
+1, HEX_DIGEST_LEN
)<0) {
3497 log_info(LD_DIR
, "Skipping non-decodable digest pair %s", escaped(cp
));
3499 smartlist_add(pairs_result
, tor_memdup(&pair
, sizeof(pair
)));
3503 } SMARTLIST_FOREACH_END(cp
);
3504 smartlist_free(pairs_tmp
);
3507 smartlist_sort(pairs_result
, _compare_pairs
);
3508 smartlist_uniq(pairs_result
, _compare_pairs
, _tor_free
);
3510 smartlist_add_all(pairs_out
, pairs_result
);
3511 smartlist_free(pairs_result
);
3515 /** Given a directory <b>resource</b> request, containing zero
3516 * or more strings separated by plus signs, followed optionally by ".z", store
3517 * the strings, in order, into <b>fp_out</b>. If <b>compressed_out</b> is
3518 * non-NULL, set it to 1 if the resource ends in ".z", else set it to 0. If
3519 * decode_hex is true, then delete all elements that aren't hex digests, and
3520 * decode the rest. If sort_uniq is true, then sort the list and remove
3524 dir_split_resource_into_fingerprints(const char *resource
,
3525 smartlist_t
*fp_out
, int *compressed_out
,
3526 int decode_hex
, int sort_uniq
)
3528 smartlist_t
*fp_tmp
= smartlist_create();
3530 smartlist_split_string(fp_tmp
, resource
, "+", 0, 0);
3532 *compressed_out
= 0;
3533 if (smartlist_len(fp_tmp
)) {
3534 char *last
= smartlist_get(fp_tmp
,smartlist_len(fp_tmp
)-1);
3535 size_t last_len
= strlen(last
);
3536 if (last_len
> 2 && !strcmp(last
+last_len
-2, ".z")) {
3537 last
[last_len
-2] = '\0';
3539 *compressed_out
= 1;
3544 char *cp
, *d
= NULL
;
3545 for (i
= 0; i
< smartlist_len(fp_tmp
); ++i
) {
3546 cp
= smartlist_get(fp_tmp
, i
);
3547 if (strlen(cp
) != HEX_DIGEST_LEN
) {
3549 "Skipping digest %s with non-standard length.", escaped(cp
));
3550 smartlist_del_keeporder(fp_tmp
, i
--);
3553 d
= tor_malloc_zero(DIGEST_LEN
);
3554 if (base16_decode(d
, DIGEST_LEN
, cp
, HEX_DIGEST_LEN
)<0) {
3555 log_info(LD_DIR
, "Skipping non-decodable digest %s", escaped(cp
));
3556 smartlist_del_keeporder(fp_tmp
, i
--);
3559 smartlist_set(fp_tmp
, i
, d
);
3567 smartlist_t
*fp_tmp2
= smartlist_create();
3570 smartlist_sort_digests(fp_tmp
);
3572 smartlist_sort_strings(fp_tmp
);
3573 if (smartlist_len(fp_tmp
))
3574 smartlist_add(fp_tmp2
, smartlist_get(fp_tmp
, 0));
3575 for (i
= 1; i
< smartlist_len(fp_tmp
); ++i
) {
3576 char *cp
= smartlist_get(fp_tmp
, i
);
3577 char *last
= smartlist_get(fp_tmp2
, smartlist_len(fp_tmp2
)-1);
3579 if ((decode_hex
&& memcmp(cp
, last
, DIGEST_LEN
))
3580 || (!decode_hex
&& strcasecmp(cp
, last
)))
3581 smartlist_add(fp_tmp2
, cp
);
3585 smartlist_free(fp_tmp
);
3588 smartlist_add_all(fp_out
, fp_tmp
);
3589 smartlist_free(fp_tmp
);