Bug#576569: Does not fall back to IPv4 if IPv6 address is unreachable

martin f krafft madduck at debian.org
Mon Apr 5 17:33:43 UTC 2010

Package: libsoup2.4-1
Version: 2.29.91-1
Severity: normal
Tags: ipv6

My IPv6 route to home is currently down. libsoup does not handle
this like it should. For instance, curl just falls back to IPv4:

  % curl --verbose --cacert /etc/ssl/certs/cacert.org.pem https://domine.madduck.net
  * About to connect() to domine.madduck.net port 443 (#0)
  *   Trying 2001:1620:2018:2::4d6d:8b5a... Network is unreachable
  *   Trying connected
  * Connected to domine.madduck.net ( port 443 (#0)

I don't have any debug output for libsoup, but I ran into this:

  Problem: http://www.mail-archive.com/syncevolution@syncevolution.org/msg00440.html
  Solution: http://www.mail-archive.com/syncevolution@syncevolution.org/msg00451.html

and the verdict is quite clear: libsoup does not try IPv4 after it
failed to connect to IPv6. I think it should.

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.33-2-686 (SMP w/1 CPU core)
Locale: LANG=en_GB, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libsoup2.4-1 depends on:
ii  libc6                   2.10.2-6         Embedded GNU C Library: Shared lib
ii  libgcrypt11             1.4.5-2          LGPL Crypto library - runtime libr
ii  libglib2.0-0            2.22.4-1         The GLib library of C routines
ii  libgnutls26             2.8.5-2          the GNU TLS library - runtime libr
ii  libxml2                 2.7.6.dfsg-2+b1  GNOME XML library
ii  zlib1g                  1: compression library - runtime

libsoup2.4-1 recommends no packages.

libsoup2.4-1 suggests no packages.

-- no debconf information

 .''`.   martin f. krafft <madduck at d.o>      Related projects:
: :'  :  proud Debian developer               http://debiansystem.info
`. `'`   http://people.debian.org/~madduck    http://vcs-pkg.org
  `-  Debian - when you have better things to do than fixing systems
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