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Use correct logic to decide whether there are more directory servers to retry.

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svn:r3257
This commit is contained in:
Nick Mathewson 2005-01-03 20:51:24 +00:00
parent 65c4fa2614
commit 0c4186d6ee
5 changed files with 36 additions and 28 deletions
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32
src/or/directory.c
View File

@ -143,9 +143,12 @@ directory_post_to_dirservers(uint8_t purpose, const char *payload,
* connection purpose 'purpose' requesting 'resource'. The purpose
* should be one of 'DIR_PURPOSE_FETCH_DIR',
* 'DIR_PURPOSE_FETCH_RENDDESC', 'DIR_PURPOSE_FETCH_RUNNING_LIST.'
* If <b>retry_if_no_servers</b>, then if all the possible servers seem
* down, mark them up and try again.
*/
void
directory_get_from_dirserver(uint8_t purpose, const char *resource)
directory_get_from_dirserver(uint8_t purpose, const char *resource,
int retry_if_no_servers)
{
routerinfo_t *r = NULL;
trusted_dir_server_t *ds = NULL;
@ -155,30 +158,34 @@ directory_get_from_dirserver(uint8_t purpose, const char *resource)
purpose == DIR_PURPOSE_FETCH_RUNNING_LIST) {
if (advertised_server_mode()) {
/* only ask authdirservers, and don't ask myself */
ds = router_pick_trusteddirserver(1, fascistfirewall);
ds = router_pick_trusteddirserver(1, fascistfirewall,
retry_if_no_servers);
} else {
/* anybody with a non-zero dirport will do */
r = router_pick_directory_server(1, fascistfirewall,
purpose==DIR_PURPOSE_FETCH_RUNNING_LIST);
purpose==DIR_PURPOSE_FETCH_RUNNING_LIST,
retry_if_no_servers);
if (!r) {
log_fn(LOG_INFO, "No router found for %s; falling back to dirserver list",
purpose == DIR_PURPOSE_FETCH_RUNNING_LIST
? "status list" : "directory");
ds = router_pick_trusteddirserver(1, fascistfirewall);
ds = router_pick_trusteddirserver(1, fascistfirewall,
retry_if_no_servers);
}
}
} else { // (purpose == DIR_PURPOSE_FETCH_RENDDESC)
/* only ask authdirservers, any of them will do */
/* Never use fascistfirewall; we're going via Tor. */
ds = router_pick_trusteddirserver(0, 0);
ds = router_pick_trusteddirserver(0, 0, retry_if_no_servers);
}
if (r)
directory_initiate_command_router(r, purpose, resource, NULL, 0);
else if (ds)
directory_initiate_command_trusted_dir(ds, purpose, resource, NULL, 0);
else
else {
log_fn(LOG_WARN,"No running dirservers known. Not trying. (purpose %d)", purpose);
}
}
/** Launch a new connection to the directory server <b>router</b> to upload or
@ -222,16 +229,9 @@ connection_dir_connect_failed(connection_t *conn)
router_mark_as_down(conn->identity_digest); /* don't try him again */
if (conn->purpose == DIR_PURPOSE_FETCH_DIR ||
conn->purpose == DIR_PURPOSE_FETCH_RUNNING_LIST) {
/* XXX This should possibly take into account that
* !advertised_server_mode() allows us to use more directory
* servers, and fascistfirewall allows us to use less.
*/
if (!all_trusted_directory_servers_down()) {
log_fn(LOG_INFO,"Giving up on dirserver '%s'; trying another.", conn->address);
directory_get_from_dirserver(conn->purpose, NULL);
} else {
log_fn(LOG_INFO,"Giving up on dirserver '%s'; no more to try.", conn->address);
}
log_fn(LOG_INFO, "Giving up on directory server at '%s'; retrying");
directory_get_from_dirserver(conn->purpose, NULL,
0 /* don't retry_if_no_servers */);
}
}

6
src/or/main.c
View File

@ -605,7 +605,7 @@ static void run_scheduled_events(time_t now) {
router_retry_connections();
}
directory_get_from_dirserver(DIR_PURPOSE_FETCH_DIR, NULL);
directory_get_from_dirserver(DIR_PURPOSE_FETCH_DIR, NULL, 1);
time_to_fetch_directory = now + options->DirFetchPeriod;
if (time_to_fetch_running_routers < now + options->StatusFetchPeriod) {
time_to_fetch_running_routers = now + options->StatusFetchPeriod;
@ -617,7 +617,7 @@ static void run_scheduled_events(time_t now) {
if (time_to_fetch_running_routers < now) {
if (!authdir_mode(options)) {
directory_get_from_dirserver(DIR_PURPOSE_FETCH_RUNNING_LIST, NULL);
directory_get_from_dirserver(DIR_PURPOSE_FETCH_RUNNING_LIST, NULL, 1);
}
time_to_fetch_running_routers = now + options->StatusFetchPeriod;
}
@ -779,7 +779,7 @@ static int do_hup(void) {
}
}
/* Fetch a new directory. Even authdirservers do this. */
directory_get_from_dirserver(DIR_PURPOSE_FETCH_DIR, NULL);
directory_get_from_dirserver(DIR_PURPOSE_FETCH_DIR, NULL, 1);
if (server_mode(options)) {
/* Restart cpuworker and dnsworker processes, so they get up-to-date
* configuration options. */

14
src/or/or.h
View File

@ -1313,12 +1313,13 @@ int assign_to_cpuworker(connection_t *cpuworker, unsigned char question_type,
int dir_policy_permits_address(uint32_t addr);
void directory_post_to_dirservers(uint8_t purpose, const char *payload,
size_t payload_len);
void directory_get_from_dirserver(uint8_t purpose, const char *resource);
void directory_get_from_dirserver(uint8_t purpose, const char *resource,
int retry_if_no_servers);
int connection_dir_reached_eof(connection_t *conn);
int connection_dir_process_inbuf(connection_t *conn);
int connection_dir_finished_flushing(connection_t *conn);
int connection_dir_finished_connecting(connection_t *conn);
int connection_dir_failed(connection_t *conn);
int connection_dir_connect_failed(connection_t *conn);
void parse_dir_policy(void);
/********************************* dirserv.c ***************************/
@ -1571,8 +1572,13 @@ typedef struct trusted_dir_server_t {
int router_reload_router_list(void);
void router_get_trusted_dir_servers(smartlist_t **outp);
routerinfo_t *router_pick_directory_server(int requireothers, int fascistfirewall, int for_running_routers);
trusted_dir_server_t *router_pick_trusteddirserver(int requireothers, int fascistfirewall);
routerinfo_t *router_pick_directory_server(int requireothers,
int fascistfirewall,
int for_running_routers,
int retry_if_no_servers);
trusted_dir_server_t *router_pick_trusteddirserver(int requireothers,
int fascistfirewall,
int retry_if_no_servers);
int all_trusted_directory_servers_down(void);
struct smartlist_t;
void routerlist_add_family(struct smartlist_t *sl, routerinfo_t *router);

2
src/or/rendclient.c
View File

@ -250,7 +250,7 @@ rend_client_refetch_renddesc(const char *query)
log_fn(LOG_INFO,"Would fetch a new renddesc here (for %s), but one is already in progress.", query);
} else {
/* not one already; initiate a dir rend desc lookup */
directory_get_from_dirserver(DIR_PURPOSE_FETCH_RENDDESC, query);
directory_get_from_dirserver(DIR_PURPOSE_FETCH_RENDDESC, query, 1);
}
}

10
src/or/routerlist.c
View File

@ -95,7 +95,8 @@ void router_get_trusted_dir_servers(smartlist_t **outp)
*/
routerinfo_t *router_pick_directory_server(int requireothers,
int fascistfirewall,
int for_runningrouters) {
int for_runningrouters,
int retry_if_no_servers) {
routerinfo_t *choice;
if (!routerlist)
@ -103,7 +104,7 @@ routerinfo_t *router_pick_directory_server(int requireothers,
choice = router_pick_directory_server_impl(requireothers, fascistfirewall,
for_runningrouters);
if (choice)
if (choice || !retry_if_no_servers)
return choice;
log_fn(LOG_INFO,"No reachable router entries for dirservers. Trying them all again.");
@ -128,11 +129,12 @@ routerinfo_t *router_pick_directory_server(int requireothers,
}
trusted_dir_server_t *router_pick_trusteddirserver(int requireothers,
int fascistfirewall) {
int fascistfirewall,
int retry_if_no_servers) {
trusted_dir_server_t *choice;
choice = router_pick_trusteddirserver_impl(requireothers, fascistfirewall);
if (choice)
if (choice || !retry_if_no_servers)
return choice;
log_fn(LOG_INFO,"No trusted dirservers are reachable. Trying them all again.");