static int
bgp_update_address (struct interface *ifp, const union sockunion *dst,
union sockunion *addr)
{
struct prefix *p, *sel, *d;
struct connected *connected;
struct listnode *node;
int common;
d = sockunion2hostprefix (dst);
sel = NULL;
common = -1;
for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, connected))
{
p = connected->address;
if (p->family != d->family)
continue;
if (prefix_common_bits (p, d) > common)
{
sel = p;
common = prefix_common_bits (sel, d);
}
}
prefix_free (d);
if (!sel)
return 1;
prefix2sockunion (sel, addr);
return 0;
}
int bgp_md5_set_prefix(struct prefix *p, const char *password)
{
int ret = 0;
union sockunion su;
struct listnode *node;
struct bgp_listener *listener;
/* Set or unset the password on the listen socket(s). */
frr_elevate_privs(&bgpd_privs)
{
for (ALL_LIST_ELEMENTS_RO(bm->listen_sockets, node, listener))
if (listener->su.sa.sa_family == p->family) {
prefix2sockunion(p, &su);
ret = bgp_md5_set_socket(listener->fd, &su,
p->prefixlen,
password);
break;
}
}
return ret;
}
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);
}
