1 #include <u.h>
2 #include <libc.h>
3 #include <ip.h>
4 
5 static uchar loopbacknet[IPaddrlen] = {
6 	0, 0, 0, 0,
7 	0, 0, 0, 0,
8 	0, 0, 0xff, 0xff,
9 	127, 0, 0, 0
10 };
11 static uchar loopbackmask[IPaddrlen] = {
12 	0xff, 0xff, 0xff, 0xff,
13 	0xff, 0xff, 0xff, 0xff,
14 	0xff, 0xff, 0xff, 0xff,
15 	0xff, 0, 0, 0
16 };
17 
18 /* find first ip addr that isn't the friggin loopback address */
19 /* unless there are no others */
20 int
21 myipaddr(uchar *ip, char *net)
22 {
23 	Ipifc *nifc;
24 	Iplifc *lifc;
25 	Ipifc *ifc;
26 	uchar mynet[IPaddrlen];
27 
28 	ifc = readipifc(net, nil, -1);
29 	for(nifc = ifc; nifc; nifc = nifc->next)
30 		for(lifc = nifc->lifc; lifc; lifc = lifc->next){
31 			maskip(lifc->ip, loopbackmask, mynet);
32 			if(ipcmp(mynet, loopbacknet) == 0){
33 				continue;
34 			}
35 			if(ipcmp(lifc->ip, IPnoaddr) != 0){
36 				ipmove(ip, lifc->ip);
37 				freeipifc(ifc);
38 				return 0;
39 			}
40 		}
41 	ipmove(ip, IPnoaddr);
42 	freeipifc(ifc);
43 	return -1;
44 }