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Bound the ICMP type bitmap now that it doesn't cover all possible

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ICMP type values.
This commit is contained in:
Alexander Langer 1998-01-05 00:08:57 +00:00
parent 51b5c80f31
commit 4afea9ab84
1 changed files with 3 additions and 2 deletions
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5
sys/netinet/ip_fw.c
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@ -12,7 +12,7 @@
*
* This software is provided ``AS IS'' without any warranties of any kind.
*
* $Id: ip_fw.c,v 1.67 1997/12/27 18:44:56 alex Exp $
* $Id: ip_fw.c,v 1.68 1998/01/04 22:36:12 alex Exp $
*/
/*
@ -154,7 +154,8 @@ icmptype_match(struct icmp *icmp, struct ip_fw *f)
type = icmp->icmp_type;
/* check for matching type in the bitmap */
if (f->fw_icmptypes[type / (sizeof(unsigned) * 8)] &
if (type < IP_FW_ICMPTYPES_DIM * sizeof(unsigned) * 8 &&
f->fw_icmptypes[type / (sizeof(unsigned) * 8)] &
(1U << (type % (8 * sizeof(unsigned)))))
return(1);