zmq_msg_routing_id(3) ===================== NAME ---- zmq_msg_routing_id - return routing ID for message, if any SYNOPSIS -------- *uint32_t zmq_msg_routing_id (zmq_msg_t '*message');* DESCRIPTION ----------- The _zmq_msg_routing_id()_ function returns the routing ID for the message, if any. The routing ID is set on all messages received from a 'ZMQ_SERVER' socket. To send a message to a 'ZMQ_SERVER' socket you must set the routing ID of a connected 'ZMQ_CLIENT' peer. Routing IDs are transient. RETURN VALUE ------------ The _zmq_msg_routing_id()_ function shall return zero if there is no routing ID, otherwise it shall return an unsigned 32-bit integer greater than zero. EXAMPLE ------- .Receiving a client message and routing ID ---- void *ctx = zmq_ctx_new (); assert (ctx); void *server = zmq_socket (ctx, ZMQ_SERVER); assert (server); int rc = zmq_bind (server, "tcp://127.0.0.1:8080"); assert (rc == 0); zmq_msg_t message; rc = zmq_msg_init (&message); assert (rc == 0); // Receive a message from socket rc = zmq_msg_recv (server, &message, 0); assert (rc != -1); uint32_t routing_id = zmq_msg_routing_id (&message); assert (routing_id); ---- SEE ALSO -------- linkzmq:zmq_msg_set_routing_id[3] AUTHORS ------- This page was written by the 0MQ community. To make a change please read the 0MQ Contribution Policy at .