_socket
s = _socket(AF_INET, SOCK_STREAM, 0);
s = _socket(AF_INET, SOCK_DGRAM, 0);
_socket(int, int, int);
*sockp = _socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
extern int _socket(int, int, int);
*sockp = _socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
extern int _socket(int, int, int);
extern int _socket(int, int, int);
s = _socket(AF_INET, type, 0);
if ((sock = _socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
extern int _socket(int, int, int);
if ((sock = _socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
extern int _socket(int, int, int);