socket domain에 따른 값

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>

void main(){

        socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
        socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
        socket(PF_LOCAL, SOCK_STREAM, IPPROTO_TCP);
        socket(PF_PACKET, SOCK_STREAM, IPPROTO_TCP);
        socket(PF_IPX, SOCK_STREAM, IPPROTO_TCP);
        socket(PF_FILE, SOCK_STREAM, 0);


}