ZMQ_MSG_ROUTING_ID - Online Linux Manual Page

Section : 3
Updated : 01/21/2023
Source : 0MQ 4​.3​.4
Note : 0MQ Manual
NAMEzmq_msg_routing_id − return routing ID for message, if any
SYNOPSISuint32_t zmq_msg_routing_id (zmq_msg_t *message);
DESCRIPTIONThe 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 VALUEThe 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​.
EXAMPLEReceiving 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 ALSOzmq_msg_set_routing_id(3)
AUTHORSThis page was written by the 0MQ community​. To make a change please read the 0MQ Contribution Policy at http://www​.zeromq​.org/docs:contributing​. 0
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