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pimd, zebra: Allow v6 based nexthops to work in pim

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When we get a v6 address/ifindex combo back from
a v4 lookup.  Check to see if the outgoing
interface only has one neighbor and if so
use that neighbors loopback address as
the route to use.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
Donald Sharp 2016-09-07 15:36:43 -04:00
parent 99deb321fc
commit 12c7b75bce
1 changed files with 13 additions and 16 deletions
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29
pimd/pim_zlookup.c
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@ -217,19 +217,11 @@ static int zclient_read_nexthop(struct zclient *zlookup,
return -6;
}
length -= MIN_LEN;
for (i = 0; i < nexthop_num; ++i) {
enum nexthop_types_t nexthop_type;
struct pim_neighbor *nbr;
if (length < 1) {
zlog_err("%s: socket %d empty input expecting nexthop_type: len=%d",
__func__, zlookup->sock, length);
return -7;
}
nexthop_type = stream_getc(s);
--length;
if (num_ifindex >= tab_size) {
char addr_str[100];
pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str));
@ -243,13 +235,7 @@ static int zclient_read_nexthop(struct zclient *zlookup,
case NEXTHOP_TYPE_IPV4_IFINDEX:
nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET;
if (nexthop_type == NEXTHOP_TYPE_IPV4_IFINDEX) {
if (length < 4) {
zlog_err("%s: socket %d short input expecting nexthop IPv4-addr: len=%d",
__func__, zlookup->sock, length);
return -8;
}
nexthop_tab[num_ifindex].nexthop_addr.u.prefix4.s_addr = stream_get_ipv4(s);
length -= 4;
}
else {
nexthop_tab[num_ifindex].nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY;
@ -262,7 +248,6 @@ static int zclient_read_nexthop(struct zclient *zlookup,
case NEXTHOP_TYPE_IPV4:
nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET;
nexthop_tab[num_ifindex].nexthop_addr.u.prefix4.s_addr = stream_get_ipv4(s);
length -= 4;
nexthop_tab[num_ifindex].ifindex = 0;
nexthop_tab[num_ifindex].protocol_distance = distance;
nexthop_tab[num_ifindex].route_metric = metric;
@ -277,6 +262,18 @@ static int zclient_read_nexthop(struct zclient *zlookup,
}
++num_ifindex;
break;
case NEXTHOP_TYPE_IPV6_IFINDEX:
nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET6;
stream_get (&nexthop_tab[num_ifindex].nexthop_addr.u.prefix6, s, 16);
nexthop_tab[num_ifindex].ifindex = stream_getl (s);
nbr = pim_neighbor_find_if (if_lookup_by_index_vrf (nexthop_tab[num_ifindex].ifindex, VRF_DEFAULT));
if (nbr)
{
nexthop_tab[num_ifindex].nexthop_addr.family = AF_INET;
nexthop_tab[num_ifindex].nexthop_addr.u.prefix4 = nbr->source_addr;
}
++num_ifindex;
break;
default:
/* do nothing */
{