nng_socket_proto_id(3)

NNG_SOCKET_PROTO_ID(3)

NNG Reference Manual

NNG_SOCKET_PROTO_ID(3)

NAME

nng_socket_proto_id - obtain the socket protocol id

#include <nng/nng.h>
int nng_socket_proto_id(nng_socket s, uint16_t *id);
int nng_socket_peer_id(nng_socket s, uint16_t *id);

These functions store the 16-bit protocol identifier of either the socket s, or its natural peer, in id.

Tip

These functions should be used in place of the NNG_OPT_PROTO and NNG_OPT_PEER
options in new code.

These functions return zero on success, or an error if the socket is invalid.

NNG_ECLOSED

Parameter s does not refer to an open socket.