mirror of
https://github.com/zeromq/libzmq.git
synced 2024-12-31 01:43:02 +08:00
62 lines
1.4 KiB
Plaintext
62 lines
1.4 KiB
Plaintext
|
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 <http://www.zeromq.org/docs:contributing>.
|