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NN_DEVICE(3) nanomsg 1.1.5 NN_DEVICE(3) NAME nn_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 any 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 the nn_term(3) function. RETURN VALUE The function loops until it hits an error. In such a 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 ALSO nn_socket(3) nn_term(3) nanomsg(7) AUTHORS Martin Sustrik <sustrik@250bpm.com> 2018-10-15 NN_DEVICE(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLE | SEE ALSO | AUTHORS
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