diff options
| author |   deraadt <deraadt@openbsd.org> | 1998-12-31 11:16:55 +0000 |
|---|---|---|
| committer | deraadt <deraadt@openbsd.org> | 1998-12-31 11:16:55 +0000 |
| commit | fcd0d5d60497698469f6b05d559875abc6772b0f (patch) | |
| tree | 8a1aa7537da84562fd4341c4ce0ae64f813b1f03 | |
| parent | typo; jon@oaktree.co.uk (diff) | |
| download | wireguard-openbsd-fcd0d5d60497698469f6b05d559875abc6772b0f.tar.xz wireguard-openbsd-fcd0d5d60497698469f6b05d559875abc6772b0f.zip | |
mangle uh_sum as before, but recover it for icmp errors
| -rw-r--r-- | sys/netinet/udp_usrreq.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c index 1fe83330053..b248fcd48ee 100644 --- a/sys/netinet/udp_usrreq.c +++ b/sys/netinet/udp_usrreq.c @@ -1,4 +1,4 @@ -/* $OpenBSD: udp_usrreq.c,v 1.16 1998/12/28 23:54:58 deraadt Exp $ */ +/* $OpenBSD: udp_usrreq.c,v 1.17 1998/12/31 11:16:55 deraadt Exp $ */ /* $NetBSD: udp_usrreq.c,v 1.28 1996/03/16 23:54:03 christos Exp $ */ /* @@ -113,6 +113,7 @@ udp_input(m, va_alist) struct ip save_ip; int iphlen; va_list ap; + u_int16_t savesum; va_start(ap, m); iphlen = va_arg(ap, int); @@ -168,11 +169,12 @@ udp_input(m, va_alist) * from W.R.Stevens: check incoming udp cksums even if * udpcksum is not set. */ + savesum = uh->uh_sum; if (uh->uh_sum) { bzero(((struct ipovly *)ip)->ih_x1, sizeof ((struct ipovly *)ip)->ih_x1); ((struct ipovly *)ip)->ih_len = uh->uh_ulen; - if (in_cksum(m, len + sizeof (struct ip)) != 0) { + if ((uh->uh_sum = in_cksum(m, len + sizeof (struct ip))) != 0) { udpstat.udps_badsum++; m_freem(m); return; @@ -291,6 +293,7 @@ udp_input(m, va_alist) HTONS(ip->ip_len); HTONS(ip->ip_id); HTONS(ip->ip_off); + uh->uh_sum = savesum; icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); return; } |