[Bug 1685] New: ssh attempts v4 connection w/v6 BindAddress setting in ssh config

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=1685

           Summary: ssh attempts v4 connection w/v6 BindAddress setting in
                    ssh config
           Product: Portable OpenSSH
           Version: 5.3p1
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Miscellaneous
        AssignedTo: unassigned-bugs at mindrot.org
        ReportedBy: lippard-mindrot at discord.org


The following error occurs (from sshconnect) in my mixed IPv6/v4
environment when ssh'ing from one machine to another (IP addresses have
been obfuscated)                                   

ssh -vv openapple      
OpenSSH_5.3, OpenSSL 0.9.8k 25 Mar 2009
debug1: Reading configuration data /home/lippard/.ssh/config
debug1: Applying options for openapple
debug1: Reading configuration data /etc/ssh/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to openapple [10.22.5.50] port 2222.
getaddrinfo: 2001:470:d:19a:d0::100: no address associated with name
debug1: Connecting to openapple [2001:470:d:19a:d5::50] port 2222.

The getaddrinfo error occurs because I have an ssh config which sets
the BindAddress to 2001:470:d:19a:d0::100 when I ssh to host
openapple.  openapple has a DNS A record of 10.22.5.50 and an AAAA
record of 2001:470:d:19a:d5::50 (both of which have appropriate rDNS).  

Looks like ssh is failing to recognize that my BindAddress is an IPv6
address rather than a DNS name, despite the fact that ":" is not a
valid character in DNS names.  Given my BindAddress setting, it should
not be attempting an IPv4 connection in the first place.

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