static void ipifcregisterproxy(Fs *f, Ipifc *ifc, uint8_t *ip) { Conv **cp, **e; Ipifc *nifc; Iplifc *lifc; Medium *m; uint8_t net[IPaddrlen]; /* register the address on any network that will proxy for us */ e = &f->ipifc->conv[f->ipifc->nc]; if(!isv4(ip)) { /* V6 */ for(cp = f->ipifc->conv; cp < e; cp++){ if(*cp == nil || (nifc = (Ipifc*)(*cp)->ptcl) == ifc) continue; rlock(nifc); m = nifc->medium; if(m == nil || m->addmulti == nil) { runlock(nifc); continue; } for(lifc = nifc->lifc; lifc; lifc = lifc->next){ maskip(ip, lifc->mask, net); if(ipcmp(net, lifc->remote) == 0) { /* add solicited-node multicast addr */ ipv62smcast(net, ip); addselfcache(f, nifc, lifc, net, Rmulti); arpenter(f, V6, ip, nifc->mac, 6, 0); // (*m->addmulti)(nifc, net, ip); break; } } runlock(nifc); } } else { /* V4 */ for(cp = f->ipifc->conv; cp < e; cp++){ if(*cp == nil || (nifc = (Ipifc*)(*cp)->ptcl) == ifc) continue; rlock(nifc); m = nifc->medium; if(m == nil || m->areg == nil){ runlock(nifc); continue; } for(lifc = nifc->lifc; lifc; lifc = lifc->next){ maskip(ip, lifc->mask, net); if(ipcmp(net, lifc->remote) == 0){ (*m->areg)(nifc, ip); break; } } runlock(nifc); } } }
/* * add an address to an interface. */ char* ipifcadd(Ipifc *ifc, char **argv, int argc, int tentative, Iplifc *lifcp) { int i, type, mtu, sendnbrdisc = 0; uint8_t ip[IPaddrlen], mask[IPaddrlen], rem[IPaddrlen]; uint8_t bcast[IPaddrlen], net[IPaddrlen]; Iplifc *lifc, **l; Fs *f; if(ifc->medium == nil) return "ipifc not yet bound to device"; f = ifc->conv->p->f; type = Rifc; memset(ip, 0, IPaddrlen); memset(mask, 0, IPaddrlen); memset(rem, 0, IPaddrlen); switch(argc){ case 6: if(strcmp(argv[5], "proxy") == 0) type |= Rproxy; /* fall through */ case 5: mtu = strtoul(argv[4], 0, 0); if(mtu >= ifc->medium->mintu && mtu <= ifc->medium->maxtu) ifc->maxtu = mtu; /* fall through */ case 4: if (parseip(ip, argv[1]) == -1 || parseip(rem, argv[3]) == -1) return Ebadip; parseipmask(mask, argv[2]); maskip(rem, mask, net); break; case 3: if (parseip(ip, argv[1]) == -1) return Ebadip; parseipmask(mask, argv[2]); maskip(ip, mask, rem); maskip(rem, mask, net); break; case 2: if (parseip(ip, argv[1]) == -1) return Ebadip; memmove(mask, defmask(ip), IPaddrlen); maskip(ip, mask, rem); maskip(rem, mask, net); break; default: return Ebadarg; } if(isv4(ip)) tentative = 0; wlock(ifc); /* ignore if this is already a local address for this ifc */ for(lifc = ifc->lifc; lifc; lifc = lifc->next) { if(ipcmp(lifc->local, ip) == 0) { if(lifc->tentative != tentative) lifc->tentative = tentative; if(lifcp) { lifc->onlink = lifcp->onlink; lifc->autoflag = lifcp->autoflag; lifc->validlt = lifcp->validlt; lifc->preflt = lifcp->preflt; lifc->origint = lifcp->origint; } goto out; } } /* add the address to the list of logical ifc's for this ifc */ lifc = smalloc(sizeof(Iplifc)); ipmove(lifc->local, ip); ipmove(lifc->mask, mask); ipmove(lifc->remote, rem); ipmove(lifc->net, net); lifc->tentative = tentative; if(lifcp) { lifc->onlink = lifcp->onlink; lifc->autoflag = lifcp->autoflag; lifc->validlt = lifcp->validlt; lifc->preflt = lifcp->preflt; lifc->origint = lifcp->origint; } else { /* default values */ lifc->onlink = lifc->autoflag = 1; lifc->validlt = lifc->preflt = ~0L; lifc->origint = NOW / 1000; } lifc->next = nil; for(l = &ifc->lifc; *l; l = &(*l)->next) ; *l = lifc; /* check for point-to-point interface */ if(ipcmp(ip, v6loopback)) /* skip v6 loopback, it's a special address */ if(ipcmp(mask, IPallbits) == 0) type |= Rptpt; /* add local routes */ if(isv4(ip)) v4addroute(f, tifc, rem+IPv4off, mask+IPv4off, rem+IPv4off, type); else v6addroute(f, tifc, rem, mask, rem, type); addselfcache(f, ifc, lifc, ip, Runi); if((type & (Rproxy|Rptpt)) == (Rproxy|Rptpt)){ ipifcregisterproxy(f, ifc, rem); goto out; } if(isv4(ip) || ipcmp(ip, IPnoaddr) == 0) { /* add subnet directed broadcast address to the self cache */ for(i = 0; i < IPaddrlen; i++) bcast[i] = (ip[i] & mask[i]) | ~mask[i]; addselfcache(f, ifc, lifc, bcast, Rbcast); /* add subnet directed network address to the self cache */ for(i = 0; i < IPaddrlen; i++) bcast[i] = (ip[i] & mask[i]) & mask[i]; addselfcache(f, ifc, lifc, bcast, Rbcast); /* add network directed broadcast address to the self cache */ memmove(mask, defmask(ip), IPaddrlen); for(i = 0; i < IPaddrlen; i++) bcast[i] = (ip[i] & mask[i]) | ~mask[i]; addselfcache(f, ifc, lifc, bcast, Rbcast); /* add network directed network address to the self cache */ memmove(mask, defmask(ip), IPaddrlen); for(i = 0; i < IPaddrlen; i++) bcast[i] = (ip[i] & mask[i]) & mask[i]; addselfcache(f, ifc, lifc, bcast, Rbcast); addselfcache(f, ifc, lifc, IPv4bcast, Rbcast); } else { if(ipcmp(ip, v6loopback) == 0) { /* add node-local mcast address */ addselfcache(f, ifc, lifc, v6allnodesN, Rmulti); /* add route for all node multicast */ v6addroute(f, tifc, v6allnodesN, v6allnodesNmask, v6allnodesN, Rmulti); } /* add all nodes multicast address */ addselfcache(f, ifc, lifc, v6allnodesL, Rmulti); /* add route for all nodes multicast */ v6addroute(f, tifc, v6allnodesL, v6allnodesLmask, v6allnodesL, Rmulti); /* add solicited-node multicast address */ ipv62smcast(bcast, ip); addselfcache(f, ifc, lifc, bcast, Rmulti); sendnbrdisc = 1; } /* register the address on this network for address resolution */ if(isv4(ip) && ifc->medium->areg != nil) (*ifc->medium->areg)(ifc, ip); out: wunlock(ifc); if(tentative && sendnbrdisc) icmpns(f, 0, SRC_UNSPEC, ip, TARG_MULTI, ifc->mac); return nil; }
static void ipifcregisterproxy(struct Fs *f, struct Ipifc *ifc, uint8_t * ip) { struct conv **cp, **e; struct Ipifc *nifc; struct Iplifc *lifc; struct medium *m; uint8_t net[IPaddrlen]; /* register the address on any network that will proxy for us */ e = &f->ipifc->conv[f->ipifc->nc]; if (!isv4(ip)) { // V6 for (cp = f->ipifc->conv; cp < e; cp++) { if (*cp == NULL) continue; nifc = (struct Ipifc *)(*cp)->ptcl; if (nifc == ifc) continue; rlock(&nifc->rwlock); m = nifc->m; if (m == NULL || m->addmulti == NULL) { runlock(&nifc->rwlock); continue; } for (lifc = nifc->lifc; lifc; lifc = lifc->next) { maskip(ip, lifc->mask, net); if (ipcmp(net, lifc->remote) == 0) { /* add solicited-node multicast address */ ipv62smcast(net, ip); addselfcache(f, nifc, lifc, net, Rmulti); arpenter(f, V6, ip, nifc->mac, 6, 0); //(*m->addmulti)(nifc, net, ip); break; } } runlock(&nifc->rwlock); } return; } else { // V4 for (cp = f->ipifc->conv; cp < e; cp++) { if (*cp == NULL) continue; nifc = (struct Ipifc *)(*cp)->ptcl; if (nifc == ifc) continue; rlock(&nifc->rwlock); m = nifc->m; if (m == NULL || m->areg == NULL) { runlock(&nifc->rwlock); continue; } for (lifc = nifc->lifc; lifc; lifc = lifc->next) { maskip(ip, lifc->mask, net); if (ipcmp(net, lifc->remote) == 0) { (*m->areg) (nifc, ip); break; } } runlock(&nifc->rwlock); } } }