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zebra: add rib_match_ipv6_multicast variant

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... for IPv6, analogous to v4.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
This commit is contained in:
David Lamparter 2022-04-26 14:29:38 +02:00
parent d1b7dfbe08
commit 425fd200c9
2 changed files with 59 additions and 0 deletions
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3
zebra/rib.h
View File

@ -424,6 +424,9 @@ extern struct route_entry *rib_match(afi_t afi, safi_t safi, vrf_id_t vrf_id,
extern struct route_entry *rib_match_ipv4_multicast(vrf_id_t vrf_id,
struct in_addr addr,
struct route_node **rn_out);
extern struct route_entry *rib_match_ipv6_multicast(vrf_id_t vrf_id,
struct in6_addr addr,
struct route_node **rn_out);
extern struct route_entry *rib_lookup_ipv4(struct prefix_ipv4 *p,
vrf_id_t vrf_id);

56
zebra/zebra_rib.c
View File

@ -487,6 +487,62 @@ struct route_entry *rib_match_ipv4_multicast(vrf_id_t vrf_id,
return re;
}
struct route_entry *rib_match_ipv6_multicast(vrf_id_t vrf_id,
struct in6_addr addr,
struct route_node **rn_out)
{
struct route_entry *re = NULL, *mre = NULL, *ure = NULL;
struct route_node *m_rn = NULL, *u_rn = NULL;
union g_addr gaddr = {.ipv6 = addr};
switch (zrouter.ipv4_multicast_mode) {
case MCAST_MRIB_ONLY:
return rib_match(AFI_IP6, SAFI_MULTICAST, vrf_id, &gaddr,
rn_out);
case MCAST_URIB_ONLY:
return rib_match(AFI_IP6, SAFI_UNICAST, vrf_id, &gaddr, rn_out);
case MCAST_NO_CONFIG:
case MCAST_MIX_MRIB_FIRST:
re = mre = rib_match(AFI_IP6, SAFI_MULTICAST, vrf_id, &gaddr,
&m_rn);
if (!mre)
re = ure = rib_match(AFI_IP6, SAFI_UNICAST, vrf_id,
&gaddr, &u_rn);
break;
case MCAST_MIX_DISTANCE:
mre = rib_match(AFI_IP6, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn);
ure = rib_match(AFI_IP6, SAFI_UNICAST, vrf_id, &gaddr, &u_rn);
if (mre && ure)
re = ure->distance < mre->distance ? ure : mre;
else if (mre)
re = mre;
else if (ure)
re = ure;
break;
case MCAST_MIX_PFXLEN:
mre = rib_match(AFI_IP6, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn);
ure = rib_match(AFI_IP6, SAFI_UNICAST, vrf_id, &gaddr, &u_rn);
if (mre && ure)
re = u_rn->p.prefixlen > m_rn->p.prefixlen ? ure : mre;
else if (mre)
re = mre;
else if (ure)
re = ure;
break;
}
if (rn_out)
*rn_out = (re == mre) ? m_rn : u_rn;
if (IS_ZEBRA_DEBUG_RIB)
zlog_debug("%s: %pI6: vrf: %s(%u) found %s, using %s", __func__,
&addr, vrf_id_to_name(vrf_id), vrf_id,
mre ? (ure ? "MRIB+URIB" : "MRIB")
: ure ? "URIB" : "nothing",
re == ure ? "URIB" : re == mre ? "MRIB" : "none");
return re;
}
struct route_entry *rib_lookup_ipv4(struct prefix_ipv4 *p, vrf_id_t vrf_id)
{
struct route_table *table;