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Don't try to print an NFS packet over TCP when there's not enough space

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for an RPC header (--> garbage && coredumps).
This commit is contained in:
fvdl 1996-05-26 18:35:14 +00:00
parent 2aa93b359f
commit 9ba6417ed1
1 changed files with 7 additions and 3 deletions
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10
usr.sbin/tcpdump/print-tcp.c
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@ -1,4 +1,4 @@
/* $NetBSD: print-tcp.c,v 1.6 1996/05/20 00:41:14 fvdl Exp $ */
/* $NetBSD: print-tcp.c,v 1.7 1996/05/26 18:35:14 fvdl Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
@ -37,6 +37,8 @@ static char rcsid[] =
#include <netinet/tcp.h>
#include <netinet/tcpip.h>
#include <rpc/rpc.h>
#include <stdio.h>
#ifdef __STDC__
#include <stdlib.h>
@ -122,12 +124,14 @@ tcp_print(register const u_char *bp, register int length,
* to NFS print routines.
*/
if (!qflag) {
if (length > 0 && dport == NFS_PORT) {
if ((u_char *)tp + 4 + sizeof(struct rpc_msg) <= snapend &&
dport == NFS_PORT) {
nfsreq_print((u_char *)tp + hlen + 4, length,
(u_char *)ip);
return;
}
else if (length > 0 && sport == NFS_PORT) {
else if ((u_char *)tp + 4 + sizeof(struct rpc_msg) <= snapend &&
sport == NFS_PORT) {
nfsreply_print((u_char *)tp + hlen + 4, length,
(u_char *)ip);
return;