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XS_CONNECT(3)                Crossroads I/O Manual               XS_CONNECT(3)


NAME

       xs_connect - connect a socket


SYNOPSIS

       int xs_connect (void *socket, const char *endpoint);


DESCRIPTION

       The xs_connect() function shall connect the socket referenced by the
       socket argument to the endpoint specified by the endpoint argument.

       The endpoint argument is a string consisting of two parts as follows:
       transport://address. The transport part specifies the underlying
       transport protocol to use. The meaning of the address part is specific
       to the underlying transport protocol selected.

       The following transports are defined:

       inproc
           local in-process (inter-thread) communication transport, see
           xs_inproc(7)

       ipc
           local inter-process communication transport, see xs_ipc(7)

       tcp
           unicast transport using TCP, see xs_tcp(7)

       pgm, epgm
           reliable multicast transport using PGM, see xs_pgm(7)

       With the exception of XS_PAIR sockets, a single socket may be connected
       to multiple endpoints using xs_connect(), while simultaneously
       accepting incoming connections from multiple endpoints bound to the
       socket using xs_bind(). Refer to xs_socket(3) for a description of the
       exact semantics involved when connecting or binding a socket to
       multiple endpoints.

           Note

           The connection will not be performed immediately but as needed by
           the library. Thus a successful invocation of xs_connect() does not
           indicate that a physical connection was or can actually be
           established.


RETURN VALUE

       The xs_connect() function shall return endpoint ID if successful.
       Otherwise it shall return -1 and set errno to one of the values defined
       below.


ERRORS

       EINVAL
           The endpoint supplied is invalid.

       ENAMETOOLONG
           The supplied name was too long.

       EPROTONOSUPPORT
           The requested transport protocol is not supported.

       ENOCOMPATPROTO
           The requested transport protocol is not compatible with the socket
           type.

       ETERM
           The context associated with the specified socket was terminated.

       ENOTSOCK
           The provided socket was invalid.


EXAMPLE

       Connecting a subscriber socket to an in-process and a TCP transport.

           /* Create a XS_SUB socket */
           void *socket = xs_socket (context, XS_SUB);
           assert (socket);
           /* Connect it to an in-process transport with the address 'my_publisher' */
           int rc = xs_connect (socket, "inproc://my_publisher");
           assert (rc != -1);
           /* Connect it to the host server001, port 5555 using a TCP transport */
           rc = xs_connect (socket, "tcp://server001:5555");
           assert (rc != -1);


SEE ALSO

       xs_bind(3) xs_socket(3) xs(7)


AUTHORS

       The Crossroads documentation was written by Martin Sustrik
       <sustrik@250bpm.com[1]> and Martin Lucina <martin@lucina.net[2]>.


NOTES

        1. sustrik@250bpm.com
           mailto:sustrik@250bpm.com

        2. martin@lucina.net
           mailto:martin@lucina.net

Crossroads I/O 1.2.0              02/17/2016                     XS_CONNECT(3)

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