int pim_nexthop_lookup(struct pim_nexthop *nexthop,
struct in_addr addr)
{
struct pim_zlookup_nexthop nexthop_tab[PIM_NEXTHOP_IFINDEX_TAB_SIZE];
int num_ifindex;
struct interface *ifp;
int first_ifindex;
num_ifindex = zclient_lookup_nexthop(qpim_zclient_lookup, nexthop_tab,
PIM_NEXTHOP_IFINDEX_TAB_SIZE,
addr, PIM_NEXTHOP_LOOKUP_MAX);
if (num_ifindex < 1) {
char addr_str[100];
pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
zlog_warn("%s %s: could not find nexthop ifindex for address %s",
__FILE__, __PRETTY_FUNCTION__,
addr_str);
return -1;
}
first_ifindex = nexthop_tab[0].ifindex;
if (num_ifindex > 1) {
char addr_str[100];
pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
zlog_info("%s %s: FIXME ignoring multiple nexthop ifindex'es num_ifindex=%d for address %s (using only ifindex=%d)",
__FILE__, __PRETTY_FUNCTION__,
num_ifindex, addr_str, first_ifindex);
/* debug warning only, do not return */
}
ifp = if_lookup_by_index(first_ifindex);
if (!ifp) {
char addr_str[100];
pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
zlog_warn("%s %s: could not find interface for ifindex %d (address %s)",
__FILE__, __PRETTY_FUNCTION__,
first_ifindex, addr_str);
return -2;
}
if (!ifp->info) {
char addr_str[100];
pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
zlog_warn("%s: multicast not enabled on input interface %s (ifindex=%d, RPF for source %s)",
__PRETTY_FUNCTION__,
ifp->name, first_ifindex, addr_str);
/* debug warning only, do not return */
}
if (PIM_DEBUG_PIM_TRACE) {
char nexthop_str[100];
char addr_str[100];
pim_inet4_dump("<nexthop?>", nexthop_tab[0].nexthop_addr, nexthop_str, sizeof(nexthop_str));
pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
zlog_debug("%s %s: found nexthop %s for address %s: interface %s ifindex=%d metric=%d pref=%d",
__FILE__, __PRETTY_FUNCTION__,
nexthop_str, addr_str,
ifp->name, first_ifindex,
nexthop_tab[0].route_metric,
nexthop_tab[0].protocol_distance);
}
/* update nextop data */
nexthop->interface = ifp;
nexthop->mrib_nexthop_addr = nexthop_tab[0].nexthop_addr;
nexthop->mrib_metric_preference = nexthop_tab[0].protocol_distance;
nexthop->mrib_route_metric = nexthop_tab[0].route_metric;
return 0;
}
static int fib_lookup_if_vif_index(struct in_addr addr)
{
struct pim_zlookup_nexthop nexthop_tab[PIM_NEXTHOP_IFINDEX_TAB_SIZE];
int num_ifindex;
int vif_index;
int first_ifindex;
num_ifindex = zclient_lookup_nexthop(qpim_zclient_lookup, nexthop_tab,
PIM_NEXTHOP_IFINDEX_TAB_SIZE, addr,
PIM_NEXTHOP_LOOKUP_MAX);
if (num_ifindex < 1) {
char addr_str[100];
pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
zlog_warn("%s %s: could not find nexthop ifindex for address %s",
__FILE__, __PRETTY_FUNCTION__,
addr_str);
return -1;
}
first_ifindex = nexthop_tab[0].ifindex;
if (num_ifindex > 1) {
char addr_str[100];
pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
zlog_info("%s %s: FIXME ignoring multiple nexthop ifindex'es num_ifindex=%d for address %s (using only ifindex=%d)",
__FILE__, __PRETTY_FUNCTION__,
num_ifindex, addr_str, first_ifindex);
/* debug warning only, do not return */
}
if (PIM_DEBUG_ZEBRA) {
char addr_str[100];
pim_inet4_dump("<ifaddr?>", addr, addr_str, sizeof(addr_str));
zlog_debug("%s %s: found nexthop ifindex=%d (interface %s) for address %s",
__FILE__, __PRETTY_FUNCTION__,
first_ifindex, ifindex2ifname(first_ifindex), addr_str);
}
vif_index = pim_if_find_vifindex_by_ifindex(first_ifindex);
if (vif_index < 1) {
char addr_str[100];
pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
zlog_warn("%s %s: low vif_index=%d < 1 nexthop for address %s",
__FILE__, __PRETTY_FUNCTION__,
vif_index, addr_str);
return -2;
}
zassert(qpim_mroute_oif_highest_vif_index < MAXVIFS);
if (vif_index > qpim_mroute_oif_highest_vif_index) {
char addr_str[100];
pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
zlog_warn("%s %s: high vif_index=%d > highest_vif_index=%d nexthop for address %s",
__FILE__, __PRETTY_FUNCTION__,
vif_index, qpim_mroute_oif_highest_vif_index, addr_str);
zlog_warn("%s %s: pim disabled on interface %s vif_index=%d ?",
__FILE__, __PRETTY_FUNCTION__,
ifindex2ifname(vif_index),
vif_index);
return -3;
}
return vif_index;
}