Linux uses c to obtain the Client ip address on the tcp socket server.

# Include <sys/socket. h>
# Include <arpa/inet. h>

.........

Struct sockaddr_in sa;
Int len;

.........

Len = sizeof (sa );
If (! Getpeername (sockconn, (struct sockaddr *) & sa, & len ))
{
Memset (SQL );
Snprintf (SQL, 1024, "client login. ip: % s, port: % d", inet_ntoa (sa. sin_addr), ntohs (sa. sin_port ));
Snprintf (machine_ip, 17, "% s", inet_ntoa (sa. sin_addr ));
Mylog (SQL );
}

Many of the header files on the Internet are win. I have searched for a long time to find the files that can be used in linux.