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	Bruce M Simpson <bms@spc.org>
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Date: Wed,  3 Sep 2003 01:28:05 +0100 (BST)
From: Bruce M Simpson <bms@spc.org>
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Subject: kern/56343: IP_ONESBCAST breaks udp checksums
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>Number:         56343
>Category:       kern
>Synopsis:       IP_ONESBCAST breaks udp checksums
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Sep 02 17:30:16 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     Bruce M Simpson
>Release:        FreeBSD 5.1-RELEASE i386
>Organization:
>Environment:
System: FreeBSD saboteur.dek.spc.org 5.1-RELEASE FreeBSD 5.1-RELEASE #4: Wed Aug 20 07:43:54 BST 2003 root@saboteur.dek.spc.org:/usr/src/sys/i386/compile/SABOTEUR i386


	
>Description:
	My IP_ONESBCAST code does not handle non-deferred checksums correctly.
	Checksum offloading obscured the problem.
>How-To-Repeat:
	Generate traffic using IP_ONESBCAST and observe broken checksums
	using tcpdump.
>Fix:

	


>Release-Note:
>Audit-Trail:
>Unformatted: