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patch "15" from karsten: don't retry a v2 renddesc fetch

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if we have a perfectly good v0 renddesc.


svn:r13265
This commit is contained in:
Roger Dingledine 2008-01-24 22:49:14 +00:00
parent 0ddd28b75e
commit d262fff20d
2 changed files with 50 additions and 20 deletions
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17
src/or/directory.c
View File

@ -1798,16 +1798,27 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
(int)body_len, status_code, escaped(reason));
switch (status_code) {
case 200:
if (rend_cache_store_v2_desc_as_client(body, NULL) < 0) {
switch (rend_cache_store_v2_desc_as_client(body, NULL)) {
case -2:
log_warn(LD_REND,"Fetching v2 rendezvous descriptor failed. "
"Retrying at another directory.");
/* We'll retry when connection_about_to_close_connection()
* cleans this dir conn up. */
} else {
break;
case -1:
/* We already have a v0 descriptor here. Ignoring this one
* and _not_ performing another request. */
log_info(LD_REND, "Successfully fetched v2 rendezvous "
"descriptor, but we already have a v0 descriptor.");
conn->_base.purpose = DIR_PURPOSE_HAS_FETCHED_RENDDESC;
break;
default:
/* success. notify pending connections about this. */
log_info(LD_REND, "Successfully fetched rendezvous descriptor.");
log_info(LD_REND, "Successfully fetched v2 rendezvous "
"descriptor.");
conn->_base.purpose = DIR_PURPOSE_HAS_FETCHED_RENDDESC;
rend_client_desc_here(conn->rend_query);
break;
}
break;
case 404:

39
src/or/rendcommon.c
View File

@ -830,8 +830,11 @@ rend_cache_lookup_v2_desc_as_dir(const char *desc_id, const char **desc)
}
/** Parse *desc, calculate its service id, and store it in the cache.
* If we have a newer descriptor with the same ID, ignore this one.
* If we have a newer v0 descriptor with the same ID, ignore this one.
* If we have an older descriptor with the same ID, replace it.
* If we are acting as client due to the published flag and have any v2
* descriptor with the same ID, reject this one in order to not get
* confused with having both versions for the same service.
* Return -1 if it's malformed or otherwise rejected; return 0 if
* it's the same or older than one we've already got; return 1 if
* it's novel. The published flag tells us if we store the descriptor
@ -857,7 +860,6 @@ rend_cache_store(const char *desc, size_t desc_len, int published)
rend_service_descriptor_free(parsed);
return -1;
}
tor_snprintf(key, sizeof(key), "0%s", query);
now = time(NULL);
if (parsed->timestamp < now-REND_CACHE_MAX_AGE-REND_CACHE_MAX_SKEW) {
log_fn(LOG_PROTOCOL_WARN, LD_REND,
@ -871,10 +873,18 @@ rend_cache_store(const char *desc, size_t desc_len, int published)
rend_service_descriptor_free(parsed);
return -1;
}
/* Do we have a v2 descriptor and fetched this descriptor as a client? */
tor_snprintf(key, sizeof(key), "2%s", query);
if (!published && strmap_get_lc(rend_cache, key)) {
log_info(LD_REND, "We already have a v2 descriptor for service %s.",
safe_str(query));
return -1;
}
/* report novel publication to statistics */
if (published && options->HSAuthorityRecordStats) {
hs_usage_note_publish_total(query, now);
}
tor_snprintf(key, sizeof(key), "0%s", query);
e = (rend_cache_entry_t*) strmap_get_lc(rend_cache, key);
if (e && e->parsed->timestamp > parsed->timestamp) {
log_info(LD_REND,"We already have a newer service descriptor %s with the "
@ -1028,11 +1038,13 @@ rend_cache_store_v2_desc_as_dir(const char *desc)
* <b>NULL</b> if decryption is not necessary), and store the descriptor to
* the local cache under its version and service id.
*
* If we have a newer descriptor with the same ID, ignore this one.
* If we have a newer v2 descriptor with the same ID, ignore this one.
* If we have an older descriptor with the same ID, replace it.
* Return -1 if it's malformed or otherwise rejected; return 0 if
* it's the same or older than one we've already got; return 1 if
* it's novel.
* If we have any v0 descriptor with the same ID, reject this one in order
* to not get confused with having both versions for the same service.
* Return -2 if it's malformed or otherwise rejected; return -1 if we
* already have a v0 descriptor here; return 0 if it's the same or older
* than one we've already got; return 1 if it's novel.
*/
int
rend_cache_store_v2_desc_as_client(const char *desc,
@ -1072,14 +1084,14 @@ rend_cache_store_v2_desc_as_client(const char *desc,
if (parsed) rend_service_descriptor_free(parsed);
tor_free(intro_content);
log_warn(LD_REND, "Could not parse descriptor.");
return -1;
return -2;
}
/* Compute service ID from public key. */
if (rend_get_service_id(parsed->pk, service_id)<0) {
log_warn(LD_REND, "Couldn't compute service ID.");
rend_service_descriptor_free(parsed);
tor_free(intro_content);
return -1;
return -2;
}
/* Decode/decrypt introduction points. */
if (intro_content) {
@ -1088,7 +1100,7 @@ rend_cache_store_v2_desc_as_client(const char *desc,
log_warn(LD_PROTOCOL,"Couldn't decode/decrypt introduction points.");
rend_service_descriptor_free(parsed);
tor_free(intro_content);
return -1;
return -2;
}
} else {
parsed->intro_nodes = smartlist_create();
@ -1100,13 +1112,20 @@ rend_cache_store_v2_desc_as_client(const char *desc,
log_warn(LD_REND, "Service descriptor with service ID %s is too old.",
service_id);
rend_service_descriptor_free(parsed);
return -1;
return -2;
}
/* Is descriptor too far in the future? */
if (parsed->timestamp > now + REND_CACHE_MAX_SKEW) {
log_warn(LD_REND, "Service descriptor with service ID %s is too far in "
"the future.", service_id);
rend_service_descriptor_free(parsed);
return -2;
}
/* Do we have a v0 descriptor? */
tor_snprintf(key, sizeof(key), "0%s", service_id);
if (strmap_get_lc(rend_cache, key)) {
log_info(LD_REND, "We already have a v0 descriptor for service ID %s.",
service_id);
return -1;
}
/* Do we already have a newer descriptor? */