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Drop packets, that have a Class-D address as source address.

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Implements the first half of PR 7003.
This commit is contained in:
hwr 1999-05-03 21:14:47 +00:00
parent f499d38511
commit 33a8a5933b
1 changed files with 10 additions and 1 deletions
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11
sys/netinet/ip_input.c
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@ -1,4 +1,4 @@
/* $NetBSD: ip_input.c,v 1.84 1999/04/07 05:34:32 proff Exp $ */
/* $NetBSD: ip_input.c,v 1.85 1999/05/03 21:14:47 hwr Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -340,6 +340,15 @@ next:
}
ip = mtod(m, struct ip *);
}
/*
* we drop packets that have a multicast address as source
* as wanted by rfc 1112
*/
if (IN_MULTICAST(ip->ip_src.s_addr)) {
ipstat.ips_odropped++;
goto bad;
}
if (in_cksum(m, hlen) != 0) {
ipstat.ips_badsum++;
goto bad;