Date: Thu, 05 Dec 2013 19:30:34 +0000 From: Jase Thew <jase@FreeBSD.org> To: freebsd-stable@FreeBSD.org Subject: stable/9 -> stable/10 upgrade: No longer able to use loopback alias addresses as source addresses Message-ID: <52A0D45A.7040309@FreeBSD.org>
next in thread | raw e-mail | index | archive | help
[-- Attachment #1 --]
Hi folks,
I've recently upgraded one of my test machines from stable/9 to
stable/10 and have found that I'm no longer able to use loopback alias
addresses as source addresses. When attempting to do so, I'm receiving
"Can't assign requested address" errors. I've also confirmed this in an
up-to-date HEAD VM.
└[~]> ifconfig lo0
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2
inet 127.0.0.1 netmask 0xff000000
inet 127.0.1.1 netmask 0xffffffff
inet 127.0.1.2 netmask 0xffffffff
inet 127.0.1.3 netmask 0xffffffff
inet 127.0.1.4 netmask 0xffffffff
inet 127.0.1.5 netmask 0xffffffff
inet 127.0.1.6 netmask 0xffffffff
inet 127.0.1.7 netmask 0xffffffff
inet 127.0.1.8 netmask 0xffffffff
nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
└[~]> netstat -rn -f inet | grep lo0
88.198.54.184 link#1 UHS 0 0 lo0
127.0.0.1 link#2 UH 0 172 lo0
127.0.1.1 link#2 UH 0 0 lo0
127.0.1.2 link#2 UH 0 0 lo0
127.0.1.3 link#2 UH 0 0 lo0
127.0.1.4 link#2 UH 0 0 lo0
127.0.1.5 link#2 UH 0 0 lo0
127.0.1.6 link#2 UH 0 0 lo0
127.0.1.7 link#2 UH 0 0 lo0
127.0.1.8 link#2 UH 0 0 lo0
From a ktrace of telnet -4 -s 127.0.1.2 google.co.uk 80 :
2127 telnet CALL socket(PF_INET,SOCK_STREAM,IPPROTO_TCP)
2127 telnet RET socket 3
2127 telnet CALL getuid
2127 telnet RET getuid 0
2127 telnet CALL setuid(0)
2127 telnet RET setuid 0
2127 telnet CALL setsockopt(0x3,0,0x3,0x61e790,0x4)
2127 telnet RET setsockopt 0
2127 telnet CALL bind(0x3,0x8034160f0,0x10)
2127 telnet STRU struct sockaddr { AF_INET, 127.0.1.2:0 }
2127 telnet RET bind 0
2127 telnet CALL connect(0x3,0x8034161f0,0x10)
2127 telnet STRU struct sockaddr { AF_INET, 173.194.112.88:80 }
2127 telnet RET connect -1 errno 49 Can't assign requested address
With pretty much an identical lo0 setup on stable/8 and stable/9, this
works correctly.
Is this change of behaviour by design (and if so, how is one able to use
loopback jails and have them be able to contact the outside world short
of using some kind of proxy), or is this a bug?
Regards,
--
Jase Thew
jase@FreeBSD.org
FreeBSD Ports Committer
[-- Attachment #2 --]
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.21 (MingW32)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/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=8EAW
-----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?52A0D45A.7040309>