socketpair

socketpair

Creates a Connected Socket Pair

Portability: UNIX compatible

#include <sys/types.h>
#include <sys/socket.h>

int socketpair(int domain, int type, int protocol, int fd[2]);

socketpair creates a connected pair of unnamed sockets. The arguments are:

domain: specifies the addressing family that will be used to interpret addresses. AF_UNIX must be specified.
type: specifies the communication service type: either SOCK_STREAM or SOCK_DGRAM may be specified.
protocol: specifies the protocol to be used with the socket pair. This number corresponds to the p_proto field of the protoent structure. If a 0 is specified, the system will select the protocol. Refer to The BSD UNIX Socket Library for information about the protoent structure.
fd: is an array used to hold the file descriptors for the sockets.

If socketpair is successful, it returns 0 ; otherwise, it returns a -1 and sets errno to indicate the type of error.

socketpair is only vaild when integrated sockets are in use.

socketpair is portable to other environments, including most UNIX systems that implement BSD sockets.