Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

don't try to parse packets with short iphlen. 

From: tcpdump.org (bugtraq june 99)
This commit is contained in:
itojun 2000-02-03 17:42:01 +00:00
parent fd2fd888ef
commit b4d29cbd68
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
usr.sbin/tcpdump/print-ip.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: print-ip.c,v 1.9 1999/08/26 14:52:04 itojun Exp $ */
/* $NetBSD: print-ip.c,v 1.10 2000/02/03 17:42:01 itojun Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
@ -27,7 +27,7 @@
static const char rcsid[] =
"@(#) Header: print-ip.c,v 1.66 97/05/28 12:51:43 leres Exp (LBL)";
#else
__RCSID("$NetBSD: print-ip.c,v 1.9 1999/08/26 14:52:04 itojun Exp $");
__RCSID("$NetBSD: print-ip.c,v 1.10 2000/02/03 17:42:01 itojun Exp $");
#endif
#endif
@ -384,6 +384,10 @@ ip_print(register const u_char *bp, register u_int length)
return;
}
hlen = ip->ip_hl * 4;
if (hlen < sizeof (struct ip)) {
(void)printf("bad-hlen %d", hlen);
return;
}
len = ntohs(ip->ip_len);
if (length < len)