diff options
Diffstat (limited to 'lib/prefix.c')
| -rw-r--r-- | lib/prefix.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/lib/prefix.c b/lib/prefix.c index 35b679ab90..a34921956f 100644 --- a/lib/prefix.c +++ b/lib/prefix.c @@ -601,6 +601,53 @@ int prefix_match(const struct prefix *n, const struct prefix *p) if (np[offset] != pp[offset]) return 0; return 1; + +} + +/* + * n is a type5 evpn prefix. This function tries to see if there is an + * ip-prefix within n which matches prefix p + * If n includes p prefix then return 1 else return 0. + */ +int evpn_type5_prefix_match(const struct prefix *n, const struct prefix *p) +{ + int offset; + int shift; + int prefixlen; + const uint8_t *np, *pp; + struct prefix_evpn *evp; + + if (n->family != AF_EVPN) + return 0; + + evp = (struct prefix_evpn *)n; + pp = p->u.val; + + if ((evp->prefix.route_type != 5) || + (p->family == AF_INET6 && !is_evpn_prefix_ipaddr_v6(evp)) || + (p->family == AF_INET && !is_evpn_prefix_ipaddr_v4(evp)) || + (is_evpn_prefix_ipaddr_none(evp))) + return 0; + + prefixlen = evp->prefix.prefix_addr.ip_prefix_length; + np = &evp->prefix.prefix_addr.ip.ip.addr; + + /* If n's prefix is longer than p's one return 0. */ + if (prefixlen > p->prefixlen) + return 0; + + offset = prefixlen / PNBBY; + shift = prefixlen % PNBBY; + + if (shift) + if (maskbit[shift] & (np[offset] ^ pp[offset])) + return 0; + + while (offset--) + if (np[offset] != pp[offset]) + return 0; + return 1; + } /* If n includes p then return 1 else return 0. Prefix mask is not considered */ |