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.\"     Title: zmq_msg_set_routing_id
.\"    Author: [see the "AUTHORS" section]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 10/23/2023
.\"    Manual: 0MQ Manual
.\"    Source: 0MQ 4.3.5
.\"  Language: English
.\"
.TH "ZMQ_MSG_SET_ROUTING_" "3" "10/23/2023" "0MQ 4\&.3\&.5" "0MQ Manual"
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.SH "NAME"
zmq_msg_set_routing_id \- set routing ID property on message
.SH "SYNOPSIS"
.sp
\fBint zmq_msg_set_routing_id (zmq_msg_t \fR\fB\fI*message\fR\fR\fB, uint32_t \fR\fB\fIrouting_id\fR\fR\fB);\fR
.SH "DESCRIPTION"
.sp
The \fIzmq_msg_set_routing_id()\fR function sets the \fIrouting_id\fR specified, on the the message pointed to by the \fImessage\fR argument\&. The \fIrouting_id\fR must be greater than zero\&. To get a valid routing ID, you must receive a message from a \fIZMQ_SERVER\fR socket, and use the libzmq:zmq_msg_routing_id method\&. Routing IDs are transient\&.
.SH "RETURN VALUE"
.sp
The \fIzmq_msg_set_routing_id()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&.
.SH "ERRORS"
.PP
\fBEINVAL\fR
.RS 4
The provided
\fIrouting_id\fR
is zero\&.
.RE
.SH "SEE ALSO"
.sp
\fBzmq_msg_routing_id\fR(3) \fBzmq\fR(7)
.SH "AUTHORS"
.sp
This page was written by the 0MQ community\&. To make a change please read the 0MQ Contribution Policy at \m[blue]\fBhttp://www\&.zeromq\&.org/docs:contributing\fR\m[]\&.