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;
sockunion2hostprefix (dst, &d);
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);
}
}
if (!sel)
return 1;
prefix2sockunion (sel, addr);
return 0;
}
int nhrp_route_get_nexthop(const union sockunion *addr, struct prefix *p,
union sockunion *via, struct interface **ifp)
{
struct route_node *rn;
struct route_info *ri;
struct prefix lookup;
afi_t afi = family2afi(sockunion_family(addr));
char buf[PREFIX_STRLEN];
sockunion2hostprefix(addr, &lookup);
rn = route_node_match(zebra_rib[afi], &lookup);
if (!rn)
return 0;
ri = rn->info;
if (ri->nhrp_ifp) {
debugf(NHRP_DEBUG_ROUTE, "lookup %s: nhrp_if=%s",
prefix2str(&lookup, buf, sizeof buf),
ri->nhrp_ifp->name);
if (via)
sockunion_family(via) = AF_UNSPEC;
if (ifp)
*ifp = ri->nhrp_ifp;
} else {
debugf(NHRP_DEBUG_ROUTE, "lookup %s: zebra route dev %s",
prefix2str(&lookup, buf, sizeof buf),
ri->ifp ? ri->ifp->name : "(none)");
if (via)
*via = ri->via;
if (ifp)
*ifp = ri->ifp;
}
if (p)
*p = rn->p;
route_unlock_node(rn);
return 1;
}
