/* Returns 1 if a failover server candidate is available.
Close connection and return 0 if none was found.
*/
int failover_server(int conn)
{
int server = conns[conn].server;
DEBUG(2, "failover_server(%d)", conn);
if (server_alg & ALG_STUBBORN) {
DEBUG(2, "Won't failover because we are stubborn");
close_conn(conn);
return 0;
}
if (server == abuse_server) {
DEBUG(2, "Won't failover from abuse server");
close_conn(conn);
return 0;
}
if (server == emerg_server) {
DEBUG(2, "Already using emergency server, won't fail over");
close_conn(conn);
return 0;
}
if (conns[conn].upfd != -1) {
close(conns[conn].upfd);
conns[conn].upfd = -1;
}
do {
server = (server+1) % nservers;
DEBUG(2, "Intend to try server %d", server);
if (try_server(server, conn)) return 1;
} while (server != conns[conn].initial);
DEBUG(1, "using emergency server, remember to reset flag");
emergency = 1;
if (try_server(emerg_server, conn)) return 1;
close_conn(conn);
return 0;
}
BaconMessageConnection *
bacon_message_connection_new (const char *prefix)
{
BaconMessageConnection *conn;
g_return_val_if_fail (prefix != NULL, NULL);
conn = g_new0 (BaconMessageConnection, 1);
conn->path = socket_filename (prefix);
if (test_is_socket (conn->path) == FALSE)
{
if (!try_server (conn))
{
bacon_message_connection_free (conn);
return NULL;
}
conn->is_server = TRUE;
return conn;
}
if (try_client (conn) == FALSE)
{
unlink (conn->path);
try_server (conn);
if (conn->fd == -1)
{
bacon_message_connection_free (conn);
return NULL;
}
conn->is_server = TRUE;
return conn;
}
conn->is_server = FALSE;
return conn;
}
/* Returns 1 if a failover server candidate is available.
Close connection and return 0 if none was found.
*/
int failover_server(int conn)
{
int server = conns[conn].server;
DEBUG(2, "failover_server(%d): server = %d", conn, server);
if (server_alg & ALG_STUBBORN) {
DEBUG(2, "Won't failover because we are stubborn");
close_conn(conn);
return 0;
}
if (server == ABUSE_SERVER) {
DEBUG(2, "Won't failover from abuse server (%d)", abuse_server);
close_conn(conn);
return 0;
}
if (server == EMERGENCY_SERVER) {
DEBUG(2, "Already using emergency server (%d), won't fail over", emerg_server);
close_conn(conn);
return 0;
}
if (conns[conn].upfd != -1) {
close(conns[conn].upfd);
conns[conn].upfd = -1;
}
/* there needs to be at least two regular servers in order to fail over to something else */
/* and if we couldn't find a candidate for initial_server, we're not going to find one now */
if (nservers > 1 && server != NO_SERVER) {
DEBUG(2, "Trying to find failover server. server = %d, initial = %d, nservers = %d", server, conns[conn].initial, nservers);
do {
server = (server+1) % nservers;
DEBUG(2, "Intend to try server %d", server);
if (try_server(server, conn)) return 1;
} while (server != conns[conn].initial);
}
DEBUG(1, "using emergency server, remember to reset flag");
emergency = 1;
if (try_server(emerg_server, conn)) return 1;
close_conn(conn);
return 0;
}