d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add comment about udp checksums being off in BSD 4.2 compatibility mode.

Browse Source 
Submitted by: Dr. Markus Waldeck
PR: kern/106657
This commit is contained in:
imp 2006-12-31 21:34:53 +00:00
parent b790270fcf
commit 426d73c762
1 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/netinet/udp_usrreq.c
View File

@ -93,10 +93,17 @@
* UDP protocol implementation.
* Per RFC 768, August, 1980.
*/
/*
* BSD 4.2 defaulted the udp checksum to be off. Turning off udp
* checksums removes the only data integrety mechanism for packets and
* malformed packets that would otherwise be discarded by bad checksums
* may cause problems (espeically for NFS data blocks).
*/
#ifndef COMPAT_42
static int udpcksum = 1;
#else
static int udpcksum = 0; /* XXX */
static int udpcksum = 0;
#endif
SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
&udpcksum, 0, "");