diff options
Diffstat (limited to 'zebra/zebra_rib.c')
| -rw-r--r-- | zebra/zebra_rib.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/zebra/zebra_rib.c b/zebra/zebra_rib.c index abef90fb..effe2338 100644 --- a/zebra/zebra_rib.c +++ b/zebra/zebra_rib.c @@ -75,6 +75,9 @@ static const struct /* Vector for routing table. */ static vector vrf_vector; +/* RPF lookup behaviour */ +static enum multicast_mode ipv4_multicast_mode = MCAST_NO_CONFIG; + static void _rnode_zlog(const char *_func, struct route_node *rn, int priority, const char *msgfmt, ...) @@ -782,6 +785,78 @@ rib_match_ipv4_safi (struct in_addr addr, safi_t safi, int skip_bgp, } struct rib * +rib_match_ipv4_multicast (struct in_addr addr, struct route_node **rn_out) +{ + struct rib *rib = NULL, *mrib = NULL, *urib = NULL; + struct route_node *m_rn = NULL, *u_rn = NULL; + int skip_bgp = 0; /* bool */ + + switch (ipv4_multicast_mode) + { + case MCAST_MRIB_ONLY: + return rib_match_ipv4_safi (addr, SAFI_MULTICAST, skip_bgp, rn_out); + case MCAST_URIB_ONLY: + return rib_match_ipv4_safi (addr, SAFI_UNICAST, skip_bgp, rn_out); + case MCAST_NO_CONFIG: + case MCAST_MIX_MRIB_FIRST: + rib = mrib = rib_match_ipv4_safi (addr, SAFI_MULTICAST, skip_bgp, &m_rn); + if (!mrib) + rib = urib = rib_match_ipv4_safi (addr, SAFI_UNICAST, skip_bgp, &u_rn); + break; + case MCAST_MIX_DISTANCE: + mrib = rib_match_ipv4_safi (addr, SAFI_MULTICAST, skip_bgp, &m_rn); + urib = rib_match_ipv4_safi (addr, SAFI_UNICAST, skip_bgp, &u_rn); + if (mrib && urib) + rib = urib->distance < mrib->distance ? urib : mrib; + else if (mrib) + rib = mrib; + else if (urib) + rib = urib; + break; + case MCAST_MIX_PFXLEN: + mrib = rib_match_ipv4_safi (addr, SAFI_MULTICAST, skip_bgp, &m_rn); + urib = rib_match_ipv4_safi (addr, SAFI_UNICAST, skip_bgp, &u_rn); + if (mrib && urib) + rib = u_rn->p.prefixlen > m_rn->p.prefixlen ? urib : mrib; + else if (mrib) + rib = mrib; + else if (urib) + rib = urib; + break; + } + + if (rn_out) + *rn_out = (rib == mrib) ? m_rn : u_rn; + + if (IS_ZEBRA_DEBUG_RIB) + { + char buf[BUFSIZ]; + inet_ntop (AF_INET, &addr, buf, BUFSIZ); + + zlog_debug("%s: %s: found %s, using %s", + __func__, buf, + mrib ? (urib ? "MRIB+URIB" : "MRIB") : + urib ? "URIB" : "nothing", + rib == urib ? "URIB" : rib == mrib ? "MRIB" : "none"); + } + return rib; +} + +void +multicast_mode_ipv4_set (enum multicast_mode mode) +{ + if (IS_ZEBRA_DEBUG_RIB) + zlog_debug("%s: multicast lookup mode set (%d)", __func__, mode); + ipv4_multicast_mode = mode; +} + +enum multicast_mode +multicast_mode_ipv4_get (void) +{ + return ipv4_multicast_mode; +} + +struct rib * rib_lookup_ipv4 (struct prefix_ipv4 *p) { struct route_table *table; |