diff options
Diffstat (limited to 'usr.sbin/bgpd/util.c')
| -rw-r--r-- | usr.sbin/bgpd/util.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/usr.sbin/bgpd/util.c b/usr.sbin/bgpd/util.c index 76589b60c37..b361b8c3a7c 100644 --- a/usr.sbin/bgpd/util.c +++ b/usr.sbin/bgpd/util.c @@ -1,4 +1,4 @@ -/* $OpenBSD: util.c,v 1.5 2008/11/06 21:16:27 claudio Exp $ */ +/* $OpenBSD: util.c,v 1.6 2009/06/12 16:42:53 claudio Exp $ */ /* * Copyright (c) 2006 Claudio Jeker <claudio@openbsd.org> @@ -250,3 +250,29 @@ aspath_extract(const void *seg, int pos) memcpy(&as, ptr, sizeof(u_int32_t)); return (ntohl(as)); } + +in_addr_t +prefixlen2mask(u_int8_t prefixlen) +{ + if (prefixlen == 0) + return (0); + + return (0xffffffff << (32 - prefixlen)); +} + +void +inet6applymask(struct in6_addr *dest, const struct in6_addr *src, int prefixlen) +{ + struct in6_addr mask; + int i; + + bzero(&mask, sizeof(mask)); + for (i = 0; i < prefixlen / 8; i++) + mask.s6_addr[i] = 0xff; + i = prefixlen % 8; + if (i) + mask.s6_addr[prefixlen / 8] = 0xff00 >> i; + + for (i = 0; i < 16; i++) + dest->s6_addr[i] = src->s6_addr[i] & mask.s6_addr[i]; +} |