[asterisk-dev] The New CDR system
tim at mexuar.com
Sun Apr 1 01:15:16 MST 2007
On 31 Mar 2007, at 17:17, Rod Dorman wrote:
> On Saturday, March 31, 2007, 09:43:53, critch wrote:
>> On Sat, 2007-03-31 at 10:59 +0300, Tzafrir Cohen wrote:
>>> But CDR data really needs what TCP has to offer.
>>> What you do is re-implement TCP (or TCP/with a bit of SSL). While it
>>> might work, ,it is not as good as the original.
>> The only thing needed is guarenteed delivery. IAX full frames in UDP
>> already do that. Seems to work fine for most people.
> I can understand Tzafrir's point of view. The IAX2 protocol draft
> "Full frames are sent reliably, so all full frames require an
> immediate acknowledgment upon receipt"
> whereas TCP utilizes a sliding window protocol that doesn't
> require an
> ACK for every individual transmission.
Actually if you cared to it would be legitmate for an IAX implementation
to ACK a number of fullframes by just acking the _last_ one, this
implicitly acks all the earlier full-frames in that call.
IAX is more like TCP in this respect than it is similar to other UDP
protocols (SNMP for example) where indeed each packet needs its own
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