This documentation is for version v1.3.0 of NNG, but the latest released version is v1.7.2. see the documentation for v1.7.2 for the most up-to-date information.

SYNOPSIS

#include <nng/nng.h>

int nng_socket_id(nng_socket s);

DESCRIPTION

The nng_socket_id() function returns a positive identifier for the socket s, if it is valid. Otherwise it returns -1.

A socket is considered valid if it was ever opened with a protocol constructor, such as the nng_req0_open() function. Sockets that are allocated on the stack or statically should be initialized with the macro NNG_SOCKET_INITIALIZER to ensure that they cannot be confused with a valid socket before they are opened.

RETURN VALUES

This function returns the positive value for the socket identifier, or -1 if the socket is invalid.

ERRORS

None.

SEE ALSO