static void nhrp_interface_update_nbma(struct interface *ifp)
{
struct nhrp_interface *nifp = ifp->info, *nbmanifp = NULL;
struct interface *nbmaifp = NULL;
union sockunion nbma;
sockunion_family(&nbma) = AF_UNSPEC;
if (nifp->source)
nbmaifp = if_lookup_by_name(nifp->source);
switch (ifp->ll_type) {
case ZEBRA_LLT_IPGRE: {
struct in_addr saddr = {0};
netlink_gre_get_info(ifp->ifindex, &nifp->grekey, &nifp->linkidx, &saddr);
debugf(NHRP_DEBUG_IF, "%s: GRE: %x %x %x", ifp->name, nifp->grekey, nifp->linkidx, saddr.s_addr);
if (saddr.s_addr)
sockunion_set(&nbma, AF_INET, (u_char *) &saddr.s_addr, sizeof(saddr.s_addr));
else if (!nbmaifp && nifp->linkidx != IFINDEX_INTERNAL)
nbmaifp = if_lookup_by_index(nifp->linkidx);
}
break;
default:
break;
}
if (nbmaifp)
nbmanifp = nbmaifp->info;
if (nbmaifp != nifp->nbmaifp) {
if (nifp->nbmaifp)
notifier_del(&nifp->nbmanifp_notifier);
nifp->nbmaifp = nbmaifp;
if (nbmaifp) {
notifier_add(&nifp->nbmanifp_notifier, &nbmanifp->notifier_list, nhrp_interface_interface_notifier);
debugf(NHRP_DEBUG_IF, "%s: bound to %s", ifp->name, nbmaifp->name);
}
}
if (nbmaifp) {
if (sockunion_family(&nbma) == AF_UNSPEC)
nbma = nbmanifp->afi[AFI_IP].addr;
nhrp_interface_update_mtu(ifp, AFI_IP);
nhrp_interface_update_source(ifp);
}
if (!sockunion_same(&nbma, &nifp->nbma)) {
nifp->nbma = nbma;
nhrp_interface_update(nifp->ifp);
debugf(NHRP_DEBUG_IF, "%s: NBMA address changed", ifp->name);
notifier_call(&nifp->notifier_list, NOTIFY_INTERFACE_NBMA_CHANGED);
}
nhrp_interface_update(ifp);
}
struct bfd_peer *
bfd_peer_lookup (union sockunion *su, int ifindex, u_char peer_type)
{
struct bfd_peer *peer;
struct listnode *node;
for (node = listhead (bfd_peer_list); node; nextnode (node))
{
peer = getdata (node);
if (sockunion_same (&peer->su, su) &&
peer->ifindex == ifindex && peer->type == peer_type)
return peer;
}
return NULL;
}
static void nhrp_interface_update_address(struct interface *ifp, afi_t afi, int force)
{
const int family = afi2family(afi);
struct nhrp_interface *nifp = ifp->info;
struct nhrp_afi_data *if_ad = &nifp->afi[afi];
struct nhrp_cache *nc;
struct connected *c, *best;
struct listnode *cnode;
union sockunion addr;
char buf[PREFIX_STRLEN];
/* Select new best match preferring primary address */
best = NULL;
for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, c)) {
if (PREFIX_FAMILY(c->address) != family)
continue;
if (best == NULL) {
best = c;
continue;
}
if ((best->flags & ZEBRA_IFA_SECONDARY) && !(c->flags & ZEBRA_IFA_SECONDARY)) {
best = c;
continue;
}
if (!(best->flags & ZEBRA_IFA_SECONDARY) && (c->flags & ZEBRA_IFA_SECONDARY))
continue;
if (best->address->prefixlen > c->address->prefixlen) {
best = c;
continue;
}
if (best->address->prefixlen < c->address->prefixlen)
continue;
}
/* On NHRP interfaces a host prefix is required */
if (best && if_ad->configured && best->address->prefixlen != 8 * prefix_blen(best->address)) {
zlog_notice("%s: %s is not a host prefix", ifp->name,
prefix2str(best->address, buf, sizeof buf));
best = NULL;
}
/* Update address if it changed */
if (best)
prefix2sockunion(best->address, &addr);
else
memset(&addr, 0, sizeof(addr));
if (!force && sockunion_same(&if_ad->addr, &addr))
return;
if (sockunion_family(&if_ad->addr) != AF_UNSPEC) {
nc = nhrp_cache_get(ifp, &if_ad->addr, 0);
if (nc) nhrp_cache_update_binding(nc, NHRP_CACHE_LOCAL, -1, NULL, 0, NULL);
}
debugf(NHRP_DEBUG_KERNEL, "%s: IPv%d address changed to %s",
ifp->name, afi == AFI_IP ? 4 : 6,
best ? prefix2str(best->address, buf, sizeof buf) : "(none)");
if_ad->addr = addr;
if (if_ad->configured && sockunion_family(&if_ad->addr) != AF_UNSPEC) {
nc = nhrp_cache_get(ifp, &addr, 1);
if (nc) nhrp_cache_update_binding(nc, NHRP_CACHE_LOCAL, 0, NULL, 0, NULL);
}
notifier_call(&nifp->notifier_list, NOTIFY_INTERFACE_ADDRESS_CHANGED);
}
