NN_DEVICE(3) nanomsg manual NN_DEVICE(3)NAMEnn_device - start a device
SYNOPSIS
#include <nanomsg/nn.h>
int nn_device (int s1, int s2);
DESCRIPTION
Starts a device to forward messages between two sockets. If both
sockets are valid, nn_device function loops and sends and messages
received from s1 to s2 and vice versa. If only one socket is valid and
the other is negative, nn_device works in a "loopback" mode — it loops
and sends any messages received from the socket back to itself.
To break the loop and make nn_device function exit use nn_term(3)
function.
RETURN VALUE
The function loops until it hits an error. In such case it returns -1
and sets errno to one of the values defined below.
ERRORS
EBADF
One of the provided sockets is invalid.
EINVAL
Either one of the socket is not an AF_SP_RAW socket; or the two
sockets don’t belong to the same protocol; or the directionality of
the sockets doesn’t fit (e.g. attempt to join two SINK sockets to
form a device).
EINTR
The operation was interrupted by delivery of a signal.
ETERM
The library is terminating.
EXAMPLE
int s1 = nn_socket (AF_SP_RAW, NN_REQ);
nn_bind (s1, "tcp://127.0.0.1:5555");
int s2 = nn_socket (AF_SP_RAW, NN_REP);
nn_bind (s2, "tcp://127.0.0.1:5556");
nn_device (s1, s2);
SEE ALSOnn_socket(3)nn_term(3)nanomsg(7)AUTHORS
Martin Sustrik <sustrik@250bpm.com[1]>
NOTES
1. sustrik@250bpm.com
mailto:sustrik@250bpm.com
nanomsg Unknown 12/23/2015 NN_DEVICE(3)
