Date: Thu, 22 Sep 2005 12:30:39 GMT From: Kwint <kwint@vianet.lt> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/86456: arp program hangs Message-ID: <200509221230.j8MCUdrX083017@www.freebsd.org> Resent-Message-ID: <200509221240.j8MCe67D095159@freefall.freebsd.org>
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>Number: 86456
>Category: misc
>Synopsis: arp program hangs
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Sep 22 12:40:06 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator: Kwint
>Release: FreeBSD 4.9-RELEASE
>Organization:
VIANET
>Environment:
FreeBSD gw.vianet.lt 4.9-RELEASE FreeBSD 4.9-RELEASE #7: Mon Aug 16 16:20:58 EEST 2004 kwint@gw.vianet:/usr/src/sys/compile/GATEWAY i386
>Description:
arp -da hangs unpredictably.
I mean some two or three times it deletes arp entries, but then doing again arp -da it hangs in the middle of deleting arp enries. I found that it just loops in rtmsg(int cmd, struct sockaddr_inarp *dst, struct sockaddr_dl *sdl) function in this loop:
do {
l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
it gets rtm->rtm_seq=0 and rtm->rtm_pid=0 every time.
>How-To-Repeat:
do continuos arp -da, I did it in shell script
or, change /usr/sbin/arp source code to continuosly do arp -da
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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