ref: c371fd5f4d42288acf734fcf7474b6a916ac4cf6
dir: /kern/devip.h/
enum { S_TCP, S_UDP }; int so_socket(int, unsigned char*); void so_connect(int, unsigned char*, unsigned short); void so_getsockname(int, unsigned char*, unsigned short*); void so_bind(int, int, unsigned short, unsigned char*); void so_listen(int); int so_send(int, void*, int, int); int so_recv(int, void*, int, int); int so_accept(int, unsigned char*, unsigned short*); int so_getservbyname(char*, char*, char*); int so_gethostbyname(char*, char**, int);