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104 lines
2.9 KiB
Plaintext
104 lines
2.9 KiB
Plaintext
zmq_tcp(7)
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==========
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NAME
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----
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zmq_tcp - 0MQ unicast transport using TCP
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SYNOPSIS
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--------
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TCP is an ubiquitous, reliable, unicast transport. When connecting distributed
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applications over a network with 0MQ, using the TCP transport will likely be
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your first choice.
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ADDRESSING
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----------
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A 0MQ endpoint is a string consisting of a 'transport'`://` followed by an
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'address'. The 'transport' specifies the underlying protocol to use. The
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'address' specifies the transport-specific address to connect to.
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For the TCP transport, the transport is `tcp`, and the meaning of the
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'address' part is defined below.
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Assigning a local address to a socket
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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When assigning a local address to a socket using _zmq_bind()_ with the 'tcp'
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transport, the 'endpoint' shall be interpreted as an 'interface' followed by a
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colon and the TCP port number to use.
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An 'interface' may be specified by either of the following:
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* The wild-card `*`, meaning all available interfaces.
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* The primary IPv4 or IPv6 address assigned to the interface, in its numeric
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representation.
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* The non-portable interface name as defined by the operating system.
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The TCP port number may be specified by:
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* A numeric value, usually above 1024 on POSIX systems.
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* The wild-card `*`, meaning a system-assigned ephemeral port.
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When using ephemeral ports, the caller should retrieve the actual assigned
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port using the ZMQ_LAST_ENDPOINT socket option. See linkzmq:zmq_getsockopt[3]
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for details.
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Connecting a socket
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~~~~~~~~~~~~~~~~~~~
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When connecting a socket to a peer address using _zmq_connect()_ with the 'tcp'
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transport, the 'endpoint' shall be interpreted as a 'peer address' followed by
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a colon and the TCP port number to use.
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A 'peer address' may be specified by either of the following:
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* The DNS name of the peer.
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* The IPv4 or IPv6 address of the peer, in its numeric representation.
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Note: A description of the ZeroMQ Message Transport Protocol (ZMTP) which is
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used by the TCP transport can be found at <http://rfc.zeromq.org/spec:15>
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EXAMPLES
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--------
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.Assigning a local address to a socket
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----
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// TCP port 5555 on all available interfaces
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rc = zmq_bind(socket, "tcp:/// :5555");
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assert (rc == 0);
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// TCP port 5555 on the local loop-back interface on all platforms
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rc = zmq_bind(socket, "tcp://127.0.0.1:5555");
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assert (rc == 0);
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// TCP port 5555 on the first Ethernet network interface on Linux
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rc = zmq_bind(socket, "tcp://eth0:5555");
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assert (rc == 0);
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----
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.Connecting a socket
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----
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// Connecting using an IP address
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rc = zmq_connect(socket, "tcp://192.168.1.1:5555");
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assert (rc == 0);
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// Connecting using a DNS name
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rc = zmq_connect(socket, "tcp://server1:5555");
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assert (rc == 0);
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----
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SEE ALSO
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--------
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linkzmq:zmq_bind[3]
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linkzmq:zmq_connect[3]
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linkzmq:zmq_pgm[7]
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linkzmq:zmq_ipc[7]
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linkzmq:zmq_inproc[7]
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linkzmq:zmq[7]
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AUTHORS
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-------
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This 0MQ manual page was written by Pieter Hintjens <ph@imatix.com>,
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Martin Sustrik <sustrik@250bpm.com> and Martin Lucina <mato@kotelna.sk>.
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