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Don't overwrite the checksum fields when checking them. There's no reason to 

do this, and it screws up ICMP replies.
XXX The returned IP checksum and length are still wrong.
This commit is contained in:
mycroft 1999-01-19 21:58:40 +00:00
parent bef0af5311
commit fc1211a6ab
3 changed files with 6 additions and 6 deletions
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4
sys/netinet/ip_input.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: ip_input.c,v 1.77 1999/01/11 22:35:06 thorpej Exp $ */
/* $NetBSD: ip_input.c,v 1.78 1999/01/19 21:58:40 mycroft Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -340,7 +340,7 @@ next:
}
ip = mtod(m, struct ip *);
}
if ((ip->ip_sum = in_cksum(m, hlen)) != 0) {
if (in_cksum(m, hlen) != 0) {
ipstat.ips_badsum++;
goto bad;
}

4
sys/netinet/tcp_input.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: tcp_input.c,v 1.72 1998/12/18 21:38:02 thorpej Exp $ */
/* $NetBSD: tcp_input.c,v 1.73 1999/01/19 21:58:41 mycroft Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
@ -486,7 +486,7 @@ tcp_input(m, va_alist)
bzero(ti->ti_x1, sizeof ti->ti_x1);
ti->ti_len = (u_int16_t)tlen;
HTONS(ti->ti_len);
if ((ti->ti_sum = in_cksum(m, len)) != 0) {
if (in_cksum(m, len) != 0) {
tcpstat.tcps_rcvbadsum++;
goto drop;
}

4
sys/netinet/udp_usrreq.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: udp_usrreq.c,v 1.45 1999/01/11 22:35:07 thorpej Exp $ */
/* $NetBSD: udp_usrreq.c,v 1.46 1999/01/19 21:58:41 mycroft Exp $ */
/*
* Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
@ -164,7 +164,7 @@ udp_input(m, va_alist)
bzero(((struct ipovly *)ip)->ih_x1,
sizeof ((struct ipovly *)ip)->ih_x1);
((struct ipovly *)ip)->ih_len = uh->uh_ulen;
if ((uh->uh_sum = in_cksum(m, len + sizeof (struct ip))) != 0) {
if (in_cksum(m, len + sizeof (struct ip)) != 0) {
udpstat.udps_badsum++;
m_freem(m);
return;