kern/56343: IP_ONESBCAST breaks udp checksums
Bruce M Simpson
bms at spc.org
Tue Sep 2 17:30:22 PDT 2003
>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 at 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:
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