ref: 8ac89d66a50b7718ab4cefca9e3dad64af58d3d2
dir: /sys/src/cmd/unix/drawterm/kern/devip.h/
enum { S_TCP, S_UDP }; int so_socket(int type); void so_connect(int, unsigned long, unsigned short); void so_getsockname(int, unsigned long*, unsigned short*); void so_bind(int, int, unsigned short); void so_listen(int); int so_send(int, void*, int, int); int so_recv(int, void*, int, int); int so_accept(int, unsigned long*, unsigned short*); int so_getservbyname(char*, char*, char*); int so_gethostbyname(char*, char**, int); char* hostlookup(char*);