/*
* find first ip addr suitable for proto and
* that isn't the friggin loopback address.
* deprecate link-local and multicast addresses.
*/
static int
myipvnaddr(uint8_t *ip, struct proto *proto, char *net)
{
int ipisv4, wantv4;
struct ipifc *nifc;
struct iplifc *lifc;
uint8_t mynet[IPaddrlen], linklocal[IPaddrlen];
static struct ipifc *ifc;
ipmove(linklocal, IPnoaddr);
wantv4 = proto->version == 4;
ifc = readipifc(net, ifc, -1);
for(nifc = ifc; nifc; nifc = nifc->next)
for(lifc = nifc->lifc; lifc; lifc = lifc->next){
maskip(lifc->ip, loopbackmask, mynet);
if(ipcmp(mynet, loopbacknet) == 0)
continue;
if(ISIPV6MCAST(lifc->ip) || ISIPV6LINKLOCAL(lifc->ip)) {
ipmove(linklocal, lifc->ip);
continue;
}
ipisv4 = isv4(lifc->ip) != 0;
if(ipcmp(lifc->ip, IPnoaddr) != 0 && wantv4 == ipisv4){
ipmove(ip, lifc->ip);
return 0;
}
}
/* no global unicast addrs found, fall back to link-local, if any */
ipmove(ip, linklocal);
return ipcmp(ip, IPnoaddr) == 0? -1: 0;
}
void
pipifc(void)
{
Ipifc *ip, *nip;
Iplifc *lifc;
char buf[100];
int l, i;
fmtinstall('I', eipfmt);
fmtinstall('M', eipfmt);
ip = readipifc(netroot, nil, -1);
l = 7;
for(nip = ip; nip; nip = nip->next){
for(lifc = nip->lifc; lifc; lifc = lifc->next){
i = snprint(buf, sizeof buf, "%I", lifc->ip);
if(i > l)
l = i;
i = snprint(buf, sizeof buf, "%I", lifc->net);
if(i > l)
l = i;
}
}
for(nip = ip; nip; nip = nip->next){
for(lifc = nip->lifc; lifc; lifc = lifc->next)
Bprint(&out, "%-12s %5d %-*I %5M %-*I %8lud %8lud %8lud %8lud\n",
nip->dev, nip->mtu,
l, lifc->ip, lifc->mask, l, lifc->net,
nip->pktin, nip->pktout,
nip->errin, nip->errout);
}
Bflush(&out);
}
// find first ip addr that isn't the friggin loopback address
// unless there are no others
int
myipaddr(uchar *ip, char *net)
{
Ipifc *nifc;
Iplifc *lifc;
static Ipifc *ifc;
uchar mynet[IPaddrlen];
ifc = readipifc(net, ifc, -1);
for(nifc = ifc; nifc; nifc = nifc->next)
for(lifc = nifc->lifc; lifc; lifc = lifc->next){
/* unspecified */
if(ipcmp(lifc->ip, IPnoaddr) == 0)
continue;
/* ipv6 loopback */
if(ipcmp(lifc->ip, loopback6) == 0)
continue;
/* ipv4 loopback */
maskip(lifc->ip, loopbackmask, mynet);
if(ipcmp(mynet, loopbacknet) == 0)
continue;
ipmove(ip, lifc->ip);
return 0;
}
ipmove(ip, IPnoaddr);
return -1;
}
static uchar*
getipv4addr(void)
{
Ipifc *nifc;
Iplifc *lifc;
static Ipifc *ifc;
ifc = readipifc("/net", ifc, -1);
for(nifc = ifc; nifc; nifc = nifc->next)
for(lifc = nifc->lifc; lifc; lifc = lifc->next)
if(ipcmp(lifc->ip, IPnoaddr) != 0 && ipcmp(lifc->ip, v4prefix) != 0)
return lifc->ip;
return nil;
}
void
main(void)
{
Ipifc *ifc, *list;
Iplifc *lifc;
int i;
fmtinstall('I', eipfmt);
fmtinstall('M', eipfmt);
list = readipifc("/net", nil, -1);
for(ifc = list; ifc; ifc = ifc->next){
print("ipifc %s %d\n", ifc->dev, ifc->mtu);
for(lifc = ifc->lifc; lifc; lifc = lifc->next)
print("\t%I %M %I\n", lifc->ip, lifc->mask, lifc->net);
}
}
void
readifcs(void)
{
Ipifc *ifc;
Iplifc *lifc;
Ifc *ip;
Bnet *bn;
Route route;
int i;
ifcs = readipifc(netdir, ifcs, -1);
i = 0;
for(ifc = ifcs; ifc != nil; ifc = ifc->next){
for(lifc = ifc->lifc; lifc != nil && i < Nifc; lifc = lifc->next){
// ignore any interfaces that aren't v4
if(memcmp(lifc->ip, v4prefix, IPaddrlen-IPv4addrlen) != 0)
continue;
ip = &ialloc.ifc[i++];
v6tov4(ip->addr, lifc->ip);
v6tov4mask(ip->mask, lifc->mask);
v6tov4(ip->net, lifc->net);
ip->cmask = v4defmask(ip->net);
v4maskip(ip->net, ip->cmask, ip->cnet);
ip->bcast = 0;
/* add as a route */
memmove(route.mask, ip->mask, Pasize);
memmove(route.dest, ip->net, Pasize);
memset(route.gate, 0, Pasize);
route.metric = 0;
considerroute(&route);
/* mark as broadcast */
if(bnets == 0)
ip->bcast = 1;
else for(bn = bnets; bn; bn = bn->next)
if(memcmp(bn->addr, ip->net, Pasize) == 0){
ip->bcast = 1;
break;
}
}
}
ialloc.nifc = i;
}
int
myetheraddr(uchar *to, char *dev)
{
Ipifc *ifclist, *ifc;
ifclist = readipifc(nil, nil, -1);
for(ifc=ifclist; ifc; ifc=ifc->next){
if(dev && strcmp(ifc->dev, dev) != 0)
continue;
if(memcmp(zea, ifc->ether, 6) == 0)
continue;
memmove(to, ifc->ether, 6);
freeipifc(ifclist);
return 0;
}
freeipifc(ifclist);
werrstr("no ethernet devices");
return -1;
}
