diff options
Diffstat (limited to 'common/inet.c')
| -rw-r--r-- | common/inet.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/common/inet.c b/common/inet.c index e272bd21..934eba19 100644 --- a/common/inet.c +++ b/common/inet.c @@ -35,7 +35,7 @@ #ifndef lint static char copyright[] = -"$Id: inet.c,v 1.10 2005/03/17 20:14:58 dhankins Exp $ Copyright (c) 2004-2005 Internet Systems Consortium. All rights reserved.\n"; +"$Id: inet.c,v 1.11 2006/05/15 15:07:49 dhankins Exp $ Copyright (c) 2004-2005 Internet Systems Consortium. All rights reserved.\n"; #endif /* not lint */ #include "dhcpd.h" @@ -185,6 +185,31 @@ int addr_eq (addr1, addr2) return memcmp (addr1.iabuf, addr2.iabuf, addr1.len) == 0; } +/* addr_match + * + * compares an IP address against a network/mask combination + * by ANDing the IP with the mask and seeing whether the result + * matches the masked network value. + */ +int +addr_match(addr, match) + struct iaddr *addr; + struct iaddrmatch *match; +{ + int i; + + if (addr->len != match->addr.len) + return 0; + + i = 0; + for (i = 0 ; i < addr->len ; i++) { + if ((addr->iabuf[i] & match->mask.iabuf[i]) != + match->addr.iabuf[i]) + return 0; + } + return 1; +} + char *piaddr (addr) struct iaddr addr; { |