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kern/40969: IPSEC sessions no longer establish (or send any traffic)

>Number:         40969
>Category:       kern
>Synopsis:       IPSEC sessions no longer establish (or send any traffic)
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Mar 06 01:15:01 +0000 2009
>Originator:     Geoff C. Wing
>Release:        NetBSD 5.99.7
System: NetBSD 5.99.7 NetBSD 5.99.7 (G) #0: Tue Mar 3 
12:19:02 EST 2009 i386
Architecture: i386
Machine: i386
        IPSEC sessions (esp tunnel in my case) no longer establish
        themselves.  This is due to sys/netkey/key.c:1.164
        revision 1.164
        date: 2009/01/28 19:06:03;  author: skd;  state: Exp;  lines: +4 -4
        These comparison functions return 0 on match.  Fix sense of test.
        For the two functions - key_cmpsaidx_withmode() and
        key_cmpsaidx_exactly() - which had return code comparisons
        changed there are comments above each:
 * OUT:
 *      1 : equal
 *      0 : not equal
        which clearly indicate that they return 1 on match, not 0.

        This wrong change was also made to src/sys/netipsec/key.c in
        the same commit but it was subsequently reverted.
        Use it.  Code inspection.
        Undo sys/netkey/key.c:1.164

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