[Xastir] UDP frames

[Alan Crosswell]

My aprsdigi code does UDP multicast.  Could be a good source of test traffic 
and/or an implementation to conform to:-)  I couldn't agree more that UDP is the 
perfect IP protocol to use for something that has application-level error 
correction.  Futhermore UDP multicast is the closes thing to RF broadcast.

http://aprsdigi.sf.net
/a


Wes Johnston wrote:
> In as far as I know, bob doesn't want an ack from everyone.... only
> messages(nothing do to with the transport layer), and if they are not ack'ed,
> then the APRS client would initiate another packet.  Broadcast with TCP would
> be a nightmare with potentially 254 ack's and 254packets / aprs packet on the
> subnet.
> 
> UDP has the same function as UI frames, and bob b lives with collisions on UI
> frames all the time.
> 
> wes
> --
> 
> 
> 
> Quoting Gerry Creager n5jxs <gerry.creager at tamu.edu>:
> 
> 
>>The conventional wisdom on the APRS list is that UDP is evil, because
>>Bob wants an ack from everyone.  Every time.  Never mind that APRS uses
>>UI data to work.
>>
>>Steve D. has supported him in the past.  I'm still working on him, but
>>not real actively.
>>
>>I expect the next generation of the IS will look more like multicast
>>than connected unicast, but that's my opinion.
>>
>>Would it work?  Sure.  Would it be as "reliable" as the connected
>>version?  I suspect that statistically, it would be, but the occasional
>>lost packet would be seized on a failure.
>>
>>gerry
>>
>>Wes Johnston wrote:
>>
>>>This is probably a silly question... but some of my best ideas start out
>>>silly....
>>>
>>>There was talk on the APRS sig last week about hooking up an 802.11b card
>>
>>to an
>>
>>>amp, and transmitting UDP frames to the local subnet broadcast address.
>>
>>Can we
>>
>>>do that with xastir?  Can we rx UDP frames with xastir? I know scott miller
>>
>>was
>>
>>>talking about using network broadcast of UDP for open trac.... so could it
>>
>>be
>>
>>>implemented now?
>>>
>>>wes
>>>_______________________________________________
>>>Xastir mailing list
>>>Xastir at xastir.org
>>>https://lists.xastir.org/mailman/listinfo/xastir
>>>
>>
>>--
>>Gerry Creager -- gerry.creager at tamu.edu
>>Texas Mesonet -- AATLT, Texas A&M University
>>Cell: 979.229.5301 Office: 979.458.4020
>>FAX:  979.847.8578 Pager:  979.228.0173
>>Office: 903A Eller Bldg, TAMU, College Station, TX 77843
>>
> 
> 
> _______________________________________________
> Xastir mailing list
> Xastir at xastir.org
> https://lists.xastir.org/mailman/listinfo/xastir
>