Add bridge descriptor download status queries to GETINFO

This commit is contained in:
Andrea Shepard 2016-06-28 16:12:58 +00:00
parent 8798ca4be2
commit c692900728
3 changed files with 98 additions and 0 deletions

View File

@ -2353,6 +2353,48 @@ getinfo_helper_downloads_desc(const char *desc_req,
}
}
/** Handle the bridge download cases for getinfo_helper_downloads() */
static void
getinfo_helper_downloads_bridge(const char *bridge_req,
download_status_t **dl_to_emit,
smartlist_t **digest_list,
const char **errmsg)
{
char bridge_digest[DIGEST_LEN];
/*
* Two cases to handle here:
*
* Case 1: bridge_req = "bridges"
* - Emit a list of all bridge identity digests, which we get by
* calling list_bridge_identities(); this can return NULL if we are
* not using bridges.
*
* Case 2: bridge_req = <fp>
* - Check on the specified fingerprint and emit its download_status_t
* using get_bridge_dl_status_by_id().
*/
if (strcmp(bridge_req, "bridges") == 0) {
*digest_list = list_bridge_identities();
if (!(*digest_list)) {
*errmsg = "We don't seem to be using bridges";
}
} else if (strlen(bridge_req) == HEX_DIGEST_LEN) {
if (base16_decode(bridge_digest, DIGEST_LEN,
bridge_req, strlen(bridge_req)) == DIGEST_LEN) {
/* Okay we got a digest-shaped thing; try asking for it */
*dl_to_emit = get_bridge_dl_status_by_id(bridge_digest);
if (!(*dl_to_emit)) {
*errmsg = "No such bridge identity digest found";
}
} else {
*errmsg = "That didn't look like a digest";
}
} else {
*errmsg = "Unknown bridge descriptor download status query";
}
}
/** Implementation helper for GETINFO: knows the answers for questions about
* download status information. */
static int
@ -2377,14 +2419,21 @@ getinfo_helper_downloads(control_connection_t *control_conn,
getinfo_helper_downloads_networkstatus(
question + strlen("downloads/networkstatus/"),
&dl_to_emit, errmsg);
/* Certificates? */
} else if (!strcmpstart(question, "downloads/cert/")) {
getinfo_helper_downloads_cert(
question + strlen("downloads/cert/"),
&dl_to_emit, &digest_list, errmsg);
/* Router descriptors? */
} else if (!strcmpstart(question, "downloads/desc/")) {
getinfo_helper_downloads_desc(
question + strlen("downloads/desc/"),
&dl_to_emit, &digest_list, errmsg);
/* Bridge descriptors? */
} else if (!strcmpstart(question, "downloads/bridge/")) {
getinfo_helper_downloads_bridge(
question + strlen("downloads/bridge/"),
&dl_to_emit, &digest_list, errmsg);
} else {
*errmsg = "Unknown download status query";
}
@ -2882,6 +2931,14 @@ static const getinfo_item_t getinfo_items[] = {
"Return a list of known router descriptor digests"),
DOC("downloads/desc/<desc>",
"Return a download status for a given descriptor digest"),
PREFIX("downloads/bridge/", downloads,
"Download statuses for bridge descriptors, by bridge identity "
"digest"),
DOC("downloads/bridge/bridges",
"Return a list of configured bridge identity digests with download "
"statuses"),
DOC("downloads/bridge/<desc>",
"Return a download status for a given bridge identity digest"),
ITEM("info/names", misc,
"List of GETINFO options, types, and documentation."),
ITEM("events/names", misc,

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@ -2424,6 +2424,44 @@ num_bridges_usable(void)
return n_options;
}
/** Return a smartlist containing all bridge identity digests */
smartlist_t *
list_bridge_identities(void)
{
smartlist_t *result = NULL;
char *digest_tmp;
if (get_options()->UseBridges && bridge_list) {
result = smartlist_new();
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, b) {
digest_tmp = tor_malloc(DIGEST_LEN);
memcpy(digest_tmp, b->identity, DIGEST_LEN);
smartlist_add(result, digest_tmp);
} SMARTLIST_FOREACH_END(b);
}
return result;
}
/** Get the download status for a bridge descriptor given its identity */
download_status_t *
get_bridge_dl_status_by_id(const char *digest)
{
download_status_t *dl = NULL;
if (digest && get_options()->UseBridges && bridge_list) {
SMARTLIST_FOREACH_BEGIN(bridge_list, bridge_info_t *, b) {
if (memcmp(digest, b->identity, DIGEST_LEN) == 0) {
dl = &(b->fetch_status);
break;
}
} SMARTLIST_FOREACH_END(b);
}
return dl;
}
/** Return 1 if we have at least one descriptor for an entry guard
* (bridge or member of EntryNodes) and all descriptors we know are
* down. Else return 0. If <b>act</b> is 1, then mark the down guards

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@ -179,5 +179,8 @@ guard_get_guardfraction_bandwidth(guardfraction_bandwidth_t *guardfraction_bw,
int orig_bandwidth,
uint32_t guardfraction_percentage);
smartlist_t * list_bridge_identities(void);
download_status_t * get_bridge_dl_status_by_id(const char *digest);
#endif