int mongo_replset_connect(mongo_connection* conn) {
int res = 0;
mongo_host_port* node;
conn->sock = 0;
conn->connected = 0;
/* First iterate over the seed nodes to get the canonical list of hosts
* from the replica set. Break out once we have a host list.
*/
node = conn->replset->seeds;
while( node != NULL ) {
res = mongo_socket_connect( conn, (const char*)&node->host, node->port );
if( res != MONGO_OK )
return MONGO_ERROR;
mongo_replset_check_seed( conn );
if( conn->replset->hosts )
break;
node = node->next;
}
/* Iterate over the host list, checking for the primary node. */
if( !conn->replset->hosts ) {
conn->err = MONGO_CONN_CANNOT_FIND_PRIMARY;
return MONGO_ERROR;
}
else {
node = conn->replset->hosts;
while( node != NULL ) {
res = mongo_socket_connect( conn, (const char*)&node->host, node->port );
if( res == MONGO_OK ) {
if( mongo_replset_check_host( conn ) != MONGO_OK )
return MONGO_ERROR;
/* Primary found, so return. */
else if( conn->replset->primary_connected )
return MONGO_OK;
/* No primary, so close the connection. */
else {
mongo_close_socket( conn->sock );
conn->sock = 0;
conn->connected = 0;
}
}
node = node->next;
}
}
conn->err = MONGO_CONN_CANNOT_FIND_PRIMARY;
return MONGO_ERROR;
}
mongo_conn_return mongo_replset_connect(mongo_connection* conn) {
int connect_error = 0;
mongo_host_port* node;
conn->sock = 0;
conn->connected = 0;
/* First iterate over the seed nodes to get the canonical list of hosts
* from the replica set. Break out once we have a host list.
*/
node = conn->replset->seeds;
while( node != NULL ) {
connect_error = mongo_socket_connect( conn, (const char*)&node->host, node->port );
if( connect_error == 0 ) {
if ( (connect_error = mongo_replset_check_seed( conn )) )
return connect_error;
}
if( conn->replset->hosts )
break;
node = node->next;
}
/* Iterate over the host list, checking for the primary node. */
if( !conn->replset->hosts )
return mongo_conn_cannot_find_primary;
else {
node = conn->replset->hosts;
while( node != NULL ) {
connect_error = mongo_socket_connect( conn, (const char*)&node->host, node->port );
if( connect_error == 0 ) {
if ( (connect_error = mongo_replset_check_host( conn )) )
return connect_error;
/* Primary found, so return. */
else if( conn->replset->primary_connected )
return 0;
/* No primary, so close the connection. */
else {
mongo_close_socket( conn->sock );
conn->sock = 0;
conn->connected = 0;
}
}
node = node->next;
}
}
return mongo_conn_cannot_find_primary;
}