[Pidgin] #14755: bonjour file transfer broken when IPv6 is activated in avahi

[Pidgin]

#14755: bonjour file transfer broken when IPv6 is activated in avahi
----------------------------------------------+-----------------------------
 Reporter:  tux                               |     Owner:  datallah
     Type:  defect                            |    Status:  new     
Component:  Bonjour                           |   Version:  2.10.0  
 Keywords:  bonjour ipv6 file transfer avahi  |  
----------------------------------------------+-----------------------------
 When ipv6 is activated in avahi then libpurple/pidgin prefers and tries to
 do the file transfer via IPv6 as it should.

 However this fails:
 {{{
 proxy: Error connecting to 2001:6f8:587:0:4:64ff:fea4:29b2:47505
 (Connection refused).
 }}}

 To me it looks like the receiver side only creates an IPv4 listening
 socket and therefore does not accept IPv6 connection attempts:
 {{{
 $ sudo netstat -tulpen | grep pidgin
 tcp        0      0 0.0.0.0:47505           0.0.0.0:*               LISTEN
 1000       15154       17281/lt-pidgin
 tcp        0      0 0.0.0.0:5298            0.0.0.0:*               LISTEN
 1000       14747       17281/lt-pidgin
 tcp6       0      0 :::5298                 :::*                    LISTEN
 1000       14746       17281/lt-pidgin
 }}}

 This might be the case due to the AF_INET in:

 libpurple/protocols/bonjour/bonjour_ft.c, bonjour_bytestreams_init() ->
 libpurple/network.c, purple_network_listen_range() ->
 purple_network_listen_range_family() -> purple_network_do_listen() ->
 listenfd = socket(AF_INET, socket_type, 0)

 I tested all this with two pidgin 2.10.0 instances on two Debian testing
 VMs. Plus the following patch posted to the mailing list:
 http://pidgin.im/pipermail/devel/2011-November/010482.html . This patch
 took me one step further, without it no accept-dialog and save-to-dialog
 popped up on the receiver side.

 Note: Even with this patch I suspect there might still be issues for the
 bonjour file transfer similar to the ones there were prior this patch for
 bonjour messaging with IPv6 for link local addresses.

-- 
Ticket URL: <http://developer.pidgin.im/ticket/14755>
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