ZMQ_BIND
Section: 0MQ Manual (3)
Updated: 11/23/2012
Index Return to Main Contents
NAME
zmq_bind - accept incoming connections on a socketSYNOPSIS
int zmq_bind (void *socket, const char *endpoint);
DESCRIPTION
The zmq_bind() function binds the socket to a local endpoint and then accepts incoming connections on that endpoint.
The endpoint is a string consisting of a transport:// followed by an address. The transport specifies the underlying protocol to use. The address specifies the transport-specific address to bind to.
0MQ provides the the following transports:
tcp
- unicast transport using TCP, see zmq_tcp(7)
ipc
- local inter-process communication transport, see zmq_ipc(7)
inproc
- local in-process (inter-thread) communication transport, see zmq_inproc(7)
pgm, epgm
- reliable multicast transport using PGM, see zmq_pgm(7)
Every 0MQ socket type except ZMQ_PAIR supports one-to-many and many-to-one semantics. The precise semantics depend on the socket type and are defined in zmq_socket(3).
The ipc and tcp transports accept wildcard addresses: see zmq_ipc(7) and zmq_tcp(7) for details.
-
Note
the address syntax may be different for zmq_bind() and zmq_connect() especially for the tcp, pgm and epgm transports.
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Note
following a zmq_bind(), the socket enters a mute state unless or until at least one incoming or outgoing connection is made, at which point the socket enters a ready state. In the mute state, the socket blocks or drops messages according to the socket type, as defined in zmq_socket(3). By contrast, following a libzmq:zmq_connect[3], the socket enters the ready state.
RETURN VALUE
The zmq_bind() function returns zero if successful. Otherwise it returns -1 and sets errno to one of the values defined below.
ERRORS
EINVAL
- The endpoint supplied is invalid.
EPROTONOSUPPORT
- The requested transport protocol is not supported.
ENOCOMPATPROTO
- The requested transport protocol is not compatible with the socket type.
EADDRINUSE
- The requested address is already in use.
EADDRNOTAVAIL
- The requested address was not local.
ENODEV
- The requested address specifies a nonexistent interface.
ETERM
- The 0MQ context associated with the specified socket was terminated.
ENOTSOCK
- The provided socket was invalid.
EMTHREAD
- No I/O thread is available to accomplish the task.
EXAMPLE
Binding a publisher socket to an in-process and a TCP transport.
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/* Create a ZMQ_PUB socket */ void *socket = zmq_socket (context, ZMQ_PUB); assert (socket); /* Bind it to a in-process transport with the address 'my_publisher' */ int rc = zmq_bind (socket, "inproc://my_publisher"); assert (rc == 0); /* Bind it to a TCP transport on port 5555 of the 'eth0' interface */ rc = zmq_bind (socket, "tcp://eth0:5555"); assert (rc == 0);
SEE ALSO
zmq_connect(3) zmq_socket(3) zmq(7)
AUTHORS
This 0MQ manual page was written by Pieter Hintjens <m[blue]ph@imatix.comm[][1]>, Martin Sustrik <m[blue]sustrik@250bpm.comm[][2]> and Martin Lucina <m[blue]mato@kotelna.skm[][3]>.
NOTES
- 1.
-
ph@imatix.com
- mailto:ph@imatix.com
- 2.
-
sustrik@250bpm.com
- mailto:sustrik@250bpm.com
- 3.
-
mato@kotelna.sk
- mailto:mato@kotelna.sk
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- RETURN VALUE
- ERRORS
- EXAMPLE
- SEE ALSO
- AUTHORS
- NOTES