Sockets services

bsd:u

Cmd	Name
0	Initialize
1
2	socket
3
4
5
6
7
8	recv
9
10	send
11	sendto
12	accept
13	bind
14	connect
15
16	getsockname
17
18	listen
19
20
21	setsockopt
22	shutdown
23
24
25
26	close
27
28