[Qt-interest] Wish-List-ing (Was: What is likely to be in Qt 4.8?)

[Abdelrazak Younes]

On 02/25/2011 04:02 PM, Thiago Macieira wrote:
> Em sexta-feira, 25 de fevereiro de 2011, às 15:17:06, Abdelrazak Younes
> escreveu:
>> On 02/24/2011 08:31 PM, Thiago Macieira wrote:
>>> On Thursday, 24 de February de 2011 19:03:10 Dan White wrote:
>>>> With all the speculation about the contents of the next release, I
>>>> thought I would ask if anyone has given any consideration to
>>>> Multicast support ?
>>> You mean like the one that is in Qt 4.8?
>>>
>>> http://qt.gitorious.org/qt/qt/blobs/master/src/network/socket/qudpsocket
>>> .h#line80
>> That's very interesting and welcome!
>>
>> Any chance to get support IGMP report as well? (in response to IGMP
>> queries I mean)
> The Operating System will do it for you. Multicast group membership is
> achieved by sending and replying to IGMP messages.

Very good, I didn't know that, thanks for the info.

>> I guess this works only with IPV4/IGMP, any chance for IPV6/MLD ?
> Again, this is the OS's job. Whereas multicast on IPv4 (and hence IGMP) was
> optional, multicasting on IPv6 is mandatory. MLD is not a separate protocol,
> it's part of ICMPv6.
>
> The /sbin/ipmaddr (or /sbin/ip maddr) command on Linux lists the multicast
> addresses (hence the name) that the OS is listening on. It should do IGMP
> conversations on any non-local addresses.

Aha, thanks!

> Trivia: we added multicast support because we've been designing a protocol for
> our distributed compile farm that has (had) an election mechanism similar to
> SMB, but using multicasting in a way similar to what IGMP does.

Even if you did that for something else, I suspect that video over IP 
will be the main use for it ;-)

Anyway, thanks again for this, I look forward to using it.

Abdel.