URL:
<http://gna.org/bugs/?17020>
Summary: IPv6: Improve connecting to dual-stack system
Project: Freeciv
Submitted by: None
Submitted on: Donnerstag 04.11.2010 um 14:50 CET
Category: client
Severity: 3 - Normal
Priority: 5 - Normal
Status: None
Assigned to: None
Originator Email: [email protected]
Open/Closed: Open
Release: r18414
Discussion Lock: Any
Operating System: None
Planned Release:
_______________________________________________________
Details:
I ran into a problem when setting up a game with two machines, both having
IPv6 connectivity: Both, server and client have global, public IPv6 addresses
and are able to connect to the internet via IPv6. For some reason (totally
unrelated), the server only bound to the IPv4 any-address. When trying to
connect to the host name, the IPv6 address was returned and tried, but no
connection could be made. Instead of trying the IPv4 address which was
returned as well, the client simply gave up and reported "connection
refused".
The attached patch implements the expected behavior: It iterates over all
addresses returned by getaddrinfo(3) and tries to establish a connection. If
connecting to an address fails, it continues with the next returned address.
This is the default behavior under UNIX and has the huge benefit of "working
just like any other program". For example, whether IPv4 or IPv6 is preferred
is controlled via the "/etc/gai.conf" configuration file and if a domain name
resolves to multiple addresses they will be tried in a pseudo-random
(round-robin) fashion.
In all likelihood this patch has some flaws. For example, I'm not 100%
certain if and where the file descriptor gets closed. Also, it is possible
that under Windows includes or defines are missing.
Best regards,
—octo
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Donnerstag 04.11.2010 um 14:50 CET Name: freeciv-ipv6-connect.patch
Size: 2kB By: None
<http://gna.org/bugs/download.php?file_id=11118>
_______________________________________________________
Reply to this item at:
<http://gna.org/bugs/?17020>
_______________________________________________
Nachricht geschickt von/durch Gna!
http://gna.org/
_______________________________________________
Freeciv-dev mailing list
[email protected]
https://mail.gna.org/listinfo/freeciv-dev
