Date: Fri, 20 Dec 2013 11:18:17 GMT From: John P Hartmann <jphartmann@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/185023: Closing tun<n> interface deconfigures IP address Message-ID: <201312201118.rBKBIHxX042826@oldred.freebsd.org> Resent-Message-ID: <201312201120.rBKBK1m2009712@freefall.freebsd.org>
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>Number: 185023
>Category: kern
>Synopsis: Closing tun<n> interface deconfigures IP address
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Dec 20 11:20:01 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: John P Hartmann
>Release: 9.1
>Organization:
Self
>Environment:
[root@fb91 ~]# uname -a
FreeBSD fb91.jphartmann.net 9.1-RELEASE-p7 FreeBSD 9.1-RELEASE-p7 #0: Mon Sep 9 21:34:37 UTC 2013 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
>Description:
When a /dev/tun special file is closed, it loses its assigned IP address.
Looks like it happens near line 467 of if_tun.c (the close routine), but I am not sure exactly where.
>How-To-Repeat:
[root@fb91 ~]# ifconfig tun0 up 10.0.0.103 10.0.0.104
[root@fb91 ~]# ifconfig tun0
tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1500
options=80000<LINKSTATE>
inet6 fe80::7254:d2ff:fe45:e0a0%tun0 prefixlen 64 scopeid 0x5
inet 10.0.0.103 --> 10.0.0.104 netmask 0xff000000
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
[root@fb91 ~]# cat /dev/tun0
^C
[root@fb91 ~]# ifconfig tun0
tun0: flags=8010<POINTOPOINT,MULTICAST> metric 0 mtu 1500
options=80000<LINKSTATE>
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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