From owner-freebsd-bugs  Sat Jun  8 18: 5:25 2002
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Date: Sat, 8 Jun 2002 18:05:21 -0700 (PDT)
From: <cjc@FreeBSD.org>
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To: phisto@mail.ru, cjc@FreeBSD.org, freebsd-bugs@FreeBSD.org
Subject: Re: misc/38672: ifconfig+alias
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Synopsis: ifconfig+alias

State-Changed-From-To: closed->open
State-Changed-By: cjc
State-Changed-When: Sat Jun 8 18:04:59 PDT 2002
State-Changed-Why: 
No, there is a bug here. Look again at the last configuration (my '^'s
added),

nevermind# ifconfig fxp0
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet xxx.xxx.x.10 netmask 0xffffffc0 broadcast xxx.xxx.x.63
        inet xxx.xxx.x.20 netmask 0xffffff00 broadcast xxx.xxx.x.255
                                          ^^
        ether 00:20:ed:29:33:33
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
nevermind# ifconfig fxp0 inet xxx.xxx.x.20 netmask 255.255.255.192
alias
ifconfig: ioctl (SIOCAIFADDR): File exists
nevermind# ifconfig fxp0
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet xxx.xxx.x.10 netmask 0xffffffc0 broadcast xxx.xxx.x.63
        inet xxx.xxx.x.20 netmask 0xffffffc0 broadcast xxx.xxx.x.63
                                          ^^
        ether 00:20:ed:29:33:33
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active

The bug here is that the netmask and broadcast _are_ changed despite
the fact that an invalid alias is being added. When ifconfig(8) errors
out like that, it shouldn't be leaving a broken entry.


http://www.freebsd.org/cgi/query-pr.cgi?pr=38672

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