rsync - Aug 2006 - DO NOT REPLY [Bug 4016] New: literal IPv6 addresses not supported in ssh protocol

https://bugzilla.samba.org/show_bug.cgi?id=4016

           Summary: literal IPv6 addresses not supported in ssh protocol
           Product: rsync
           Version: 2.6.9
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: core
        AssignedTo: wayned@samba.org
        ReportedBy: david.madore@ens.fr
         QAContact: rsync-qa@samba.org


It seems that literal IPv6 addresses are supported in rsync:// URI's (this
was
bug 1675, which is now fixed), but not in ssh.  For example, compare the
following behavior of rsync and scp:

vega david ~ $ rsync -av '[fe80::213:d4ff:fee9:3951%eth1]:./empty' /tmp/
ssh: fe80::213:d4ff:fee9:3951%eth1]: Name or service not known
rsync: connection unexpectedly closed (0 bytes received so far) [receiver]
rsync error: unexplained error (code 255) at io.c(463) [receiver=2.6.8]
vega david ~ $ scp -p '[fe80::213:d4ff:fee9:3951%eth1]:./empty' /tmp/
Password:
empty                                         100%    0     0.0KB/s   00:00
vega david ~ $ ssh fe80::213:d4ff:fee9:3951%eth1
Password:
Linux neptune 2.6.16-2-k7 #1 Sat Jul 15 23:05:41 UTC 2006 i686
<...>

Here I used link-local IPv6 addresses with a scope identifier just to emphasize
(and also because you don't need real IPv6 connectivity or any kind of setup
to
test this), but it doesn't work any better with (non-scoped) global
addresses:

vega david ~ $ rsync -av '[2001:7a8:7171:37:213:d4ff:fee9:3951]:./empty'
/tmp/
ssh: 2001:7a8:7171:37:213:d4ff:fee9:3951]: Name or service not known
rsync: connection unexpectedly closed (0 bytes received so far) [receiver]
rsync error: unexplained error (code 255) at io.c(463) [receiver=2.6.8]
vega david ~ $ scp -p '[2001:7a8:7171:37:213:d4ff:fee9:3951]:./empty'
/tmp/
Password:
empty                                         100%    0     0.0KB/s   00:00

This is with rsync version 2.6.8, but I also tried with today's CVS.

I'd be really glad if this were fixed (especially for scoped ll addresses,
as
there's no way to register them in DNS, so they *must* be literal, and in
some
cases, when DHCP is out of order or something, ll IPv6 is the best kind of
connection one can achieve!).

I emphasize that this is not a dup of bug 1675.

Happy hacking!


-- 
Configure bugmail: https://bugzilla.samba.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug, or are watching the QA contact.

https://bugzilla.samba.org/show_bug.cgi?id=4016





------- Comment #1 from wayned@samba.org  2006-09-17 20:17 MST -------
Created an attachment (id=2144)
 --> (https://bugzilla.samba.org/attachment.cgi?id=2144&action=view)
Fix to avoid skipping the leading '['

This patch gets rid of the code that skips the leading '[' before
handing the
hostname off to ssh.  I believe that this should work OK, but I can't test
it
at the moment (since I can't test IPv6 at the moment).  The other option
would
be to leave the leading '[' stripped and to add stripping of the
trailing ']'.


-- 
Configure bugmail: https://bugzilla.samba.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug, or are watching the QA contact.

https://bugzilla.samba.org/show_bug.cgi?id=4016


wayned@samba.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED




------- Comment #2 from wayned@samba.org  2006-09-17 20:21 MST -------
This fix was checked into CVS.


-- 
Configure bugmail: https://bugzilla.samba.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug, or are watching the QA contact.

https://bugzilla.samba.org/show_bug.cgi?id=4016


david.madore@ens.fr changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |




------- Comment #3 from david.madore@ens.fr  2006-09-18 05:16 MST -------
Unfortunately, ssh will not accept hostnames within brackets (I think it should
be more liberal in what it accepts), so you need to strip both '[' and
']'.


-- 
Configure bugmail: https://bugzilla.samba.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug, or are watching the QA contact.

https://bugzilla.samba.org/show_bug.cgi?id=4016





------- Comment #4 from david.madore@ens.fr  2006-09-18 05:21 MST -------
(By the way, on most systems - Linux, FreeBSD, OpenBSD, etc. - you might be
able to test IPv6, even without a global IPv6 address, just by loading the
module at boot and using link-local addresses, or, if even that's not an
option, using ::1 which is the IPv6 loopback.)


-- 
Configure bugmail: https://bugzilla.samba.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug, or are watching the QA contact.

https://bugzilla.samba.org/show_bug.cgi?id=4016


wayned@samba.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|                            |FIXED




------- Comment #5 from wayned@samba.org  2006-09-30 01:14 MST -------
I checked-in a fix for this last week.


-- 
Configure bugmail: https://bugzilla.samba.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug, or are watching the QA contact.