nh.bh_type = BLACKHOLE_NULL;
}
+ /*
+ * Ignore our own messages.
+ */
+ if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid)
+ return;
+
if (dest.sa.sa_family == AF_INET) {
struct prefix p;
else
p.prefixlen = ip_masklen(mask.sin.sin_addr);
- /* Catch self originated messages and match them against our
- * current RIB.
- * At the same time, ignore unconfirmed messages, they should be
- * tracked
- * by rtm_write() and kernel_rtm_ipv4().
- */
- if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) {
- char buf[PREFIX_STRLEN], gate_buf[INET_ADDRSTRLEN];
- int ret;
- if (!IS_ZEBRA_DEBUG_RIB)
- return;
- ret = rib_lookup_ipv4_route((struct prefix_ipv4 *)&p,
- &gate, VRF_DEFAULT);
- prefix2str(&p, buf, sizeof(buf));
- switch (rtm->rtm_type) {
- case RTM_ADD:
- case RTM_GET:
- case RTM_CHANGE:
- /* The kernel notifies us about a new route in
- FIB created by us.
- Do we have a correspondent entry in our RIB?
- */
- switch (ret) {
- case ZEBRA_RIB_NOTFOUND:
- zlog_debug(
- "%s: %s %s: desync: RR isn't yet in RIB, while already in FIB",
- __func__,
- lookup_msg(rtm_type_str,
- rtm->rtm_type, NULL),
- buf);
- break;
- case ZEBRA_RIB_FOUND_CONNECTED:
- case ZEBRA_RIB_FOUND_NOGATE:
- inet_ntop(AF_INET, &gate.sin.sin_addr,
- gate_buf, INET_ADDRSTRLEN);
- zlog_debug(
- "%s: %s %s: desync: RR is in RIB, but gate differs (ours is %s)",
- __func__,
- lookup_msg(rtm_type_str,
- rtm->rtm_type, NULL),
- buf, gate_buf);
- break;
- case ZEBRA_RIB_FOUND_EXACT: /* RIB RR == FIB RR
- */
- zlog_debug(
- "%s: %s %s: done Ok", __func__,
- lookup_msg(rtm_type_str,
- rtm->rtm_type, NULL),
- buf);
- rib_lookup_and_dump(
- (struct prefix_ipv4 *)&p,
- VRF_DEFAULT);
- return;
- break;
- }
- break;
- case RTM_DELETE:
- /* The kernel notifies us about a route deleted
- by us. Do we still
- have it in the RIB? Do we have anything
- instead? */
- switch (ret) {
- case ZEBRA_RIB_FOUND_EXACT:
- zlog_debug(
- "%s: %s %s: desync: RR is still in RIB, while already not in FIB",
- __func__,
- lookup_msg(rtm_type_str,
- rtm->rtm_type, NULL),
- buf);
- rib_lookup_and_dump(
- (struct prefix_ipv4 *)&p,
- VRF_DEFAULT);
- break;
- case ZEBRA_RIB_FOUND_CONNECTED:
- case ZEBRA_RIB_FOUND_NOGATE:
- zlog_debug(
- "%s: %s %s: desync: RR is still in RIB, plus gate differs",
- __func__,
- lookup_msg(rtm_type_str,
- rtm->rtm_type, NULL),
- buf);
- rib_lookup_and_dump(
- (struct prefix_ipv4 *)&p,
- VRF_DEFAULT);
- break;
- case ZEBRA_RIB_NOTFOUND: /* RIB RR == FIB RR */
- zlog_debug(
- "%s: %s %s: done Ok", __func__,
- lookup_msg(rtm_type_str,
- rtm->rtm_type, NULL),
- buf);
- rib_lookup_and_dump(
- (struct prefix_ipv4 *)&p,
- VRF_DEFAULT);
- return;
- break;
- }
- break;
- default:
- zlog_debug(
- "%s: %s: warning: loopback RTM of type %s received",
- __func__, buf,
- lookup_msg(rtm_type_str, rtm->rtm_type,
- NULL));
- }
- return;
- }
-
/* Change, delete the old prefix, we have no further information
* to specify the route really
*/
&nh, 0, 0, 0, true);
}
if (dest.sa.sa_family == AF_INET6) {
- /* One day we might have a debug section here like one in the
- * IPv4 case above. Just ignore own messages at the moment.
- */
- if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid)
- return;
struct prefix p;
ifindex_t ifindex = 0;
return NULL;
}
-/*
- * This clone function, unlike its original rib_lookup_ipv4(), checks
- * if specified IPv4 route record (prefix/mask -> gate) exists in
- * the whole RIB and has ROUTE_ENTRY_SELECTED_FIB set.
- *
- * Return values:
- * -1: error
- * 0: exact match found
- * 1: a match was found with a different gate
- * 2: connected route found
- * 3: no matches found
- */
-int rib_lookup_ipv4_route(struct prefix_ipv4 *p, union sockunion *qgate,
- vrf_id_t vrf_id)
-{
- struct route_table *table;
- struct route_node *rn;
- struct route_entry *match = NULL;
- struct nexthop *nexthop;
- int nexthops_active;
- rib_dest_t *dest;
-
- /* Lookup table. */
- table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id);
- if (!table)
- return ZEBRA_RIB_LOOKUP_ERROR;
-
- /* Scan the RIB table for exactly matching RIB entry. */
- rn = route_node_lookup(table, (struct prefix *)p);
-
- /* No route for this prefix. */
- if (!rn)
- return ZEBRA_RIB_NOTFOUND;
-
- /* Unlock node. */
- route_unlock_node(rn);
- dest = rib_dest_from_rnode(rn);
-
- /* Find out if a "selected" RR for the discovered RIB entry exists ever.
- */
- if (dest && dest->selected_fib
- && !CHECK_FLAG(dest->selected_fib->status, ROUTE_ENTRY_REMOVED))
- match = dest->selected_fib;
-
- /* None such found :( */
- if (!match)
- return ZEBRA_RIB_NOTFOUND;
-
- if (match->type == ZEBRA_ROUTE_CONNECT)
- return ZEBRA_RIB_FOUND_CONNECTED;
-
- /* Ok, we have a cood candidate, let's check it's nexthop list... */
- nexthops_active = 0;
- for (ALL_NEXTHOPS(match->ng, nexthop))
- if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) {
- nexthops_active = 1;
- if (nexthop->gate.ipv4.s_addr == sockunion2ip(qgate))
- return ZEBRA_RIB_FOUND_EXACT;
- if (IS_ZEBRA_DEBUG_RIB) {
- char gate_buf[INET_ADDRSTRLEN],
- qgate_buf[INET_ADDRSTRLEN];
- inet_ntop(AF_INET, &nexthop->gate.ipv4.s_addr,
- gate_buf, INET_ADDRSTRLEN);
- inet_ntop(AF_INET, &sockunion2ip(qgate),
- qgate_buf, INET_ADDRSTRLEN);
- zlog_debug("%s: qgate == %s, %s == %s",
- __func__, qgate_buf,
- nexthop->rparent ? "rgate" : "gate",
- gate_buf);
- }
- }
-
- if (nexthops_active)
- return ZEBRA_RIB_FOUND_NOGATE;
-
- return ZEBRA_RIB_NOTFOUND;
-}
-
#define RIB_SYSTEM_ROUTE(R) \
((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT)
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