ØMQ Manual - ØMQ/3.3.0
zmq_bind - accept incoming connections on a socket
int zmq_bind (void *socket, const char *endpoint);
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.
ØMQ provides the the following transports:
- unicast transport using TCP, see zmq_tcp(7)
- local inter-process communication transport, see zmq_ipc(7)
- local in-process (inter-thread) communication transport, see zmq_inproc(7)
- pgm, epgm
- reliable multicast transport using PGM, see zmq_pgm(7)
Every ØMQ 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 address syntax may be different for zmq_bind() and zmq_connect() especially for the tcp, pgm and epgm transports.
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, the socket enters the ready state.
The zmq_bind() function returns zero if successful. Otherwise it returns -1 and sets errno to one of the values defined below.
- The endpoint supplied is invalid.
- The requested transport protocol is not supported.
- The requested transport protocol is not compatible with the socket type.
- The requested address is already in use.
- The requested address was not local.
- The requested address specifies a nonexistent interface.
- The ØMQ context associated with the specified socket was terminated.
- The provided socket was invalid.
- No I/O thread is available to accomplish the task.
Binding a publisher socket to an in-process and a tcp transport
/* 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);
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