I dunno nothing about STUN Client but you can do several things to gurantee
order and single packet receival from UDP protocol usage. For instance:
- To maintain order: On the receiver you have to keep a list wich
receives the packets and puts them in order (you're gonna have to have a
Packet ID or something for comparison).
- To avoid duplicates: Simply dispose the packets that have their Packet
ID's less or equal to the last processed packet ID (this implies you are
gonna have to process all the packets that are in order and that have their
predecessors already been processed - oh, you can remove all the processed
packets from the Packet List to save resources).
Just an idea, please correct me if I'm wrong.
Marcelo Grossi
----- Original Message -----
From: "Arno Garrels" <[EMAIL PROTECTED]>
To: "ICS support mailing" <twsocket@elists.org>
Sent: Tuesday, August 15, 2006 2:41 PM
Subject: [twsocket] Implementing STUN, RFC3489
> Francois PIETTE wrote in
> Re: [twsocket] UDP Concept doubt:
>>
>> UDP packets are not fragmented at the application level, but you may
>> get
>> duplicates, or miss some packet, recieve the packets in incorrect
>> order.
>> Those conditions are very difficult to reproduce on a small LAN. You
>> have to
>> have a large LAN with different speed in different subnet and have
>> several
>> routes between points A and B. You are likely to get the problems on
>> the
>> internet when communicating between systems with long routes between
>> them
>
> So how can I ever work around those problems? I want to write a simple
> STUN client component but UDP is the proto :( except upon SSL conections.
> Never done anything in UDP so far.
>
> ---
> Arno Garrels [TeamICS]
> http://www.overbyte.be/eng/overbyte/teamics.html
>
>
>
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