[asterisk-dev] [Code Review] 4328: res_pjsip: Document transport selection process

[Joshua Colp]

> On Jan. 12, 2015, 10:50 p.m., Mark Michelson wrote:
> > * "The transport type from above is used to determine which SRV record to look up. This means that the original URI *must* include the transport type for TCP and TLS types."
> > What if the URI is a SIPS URI? Does that have any bearing on transport selection?
> > 
> > * "The first configured transport matching the transport type and address family is selected"
> > What does this mean? Can a user influence which transport is "first" ?
> > 
> > * I really can't make sense of the "Multi-homed Transport Selection" section. Specifically, what is meant by "Source matches source in message" ?
> > 
> > * In the "connection-less protocol with maddr" section, what does "transport type" refer to? I assume it's a ;transport parameter from a URI, but which URI? Same goes for the "connection-less protocol without rport" section.
> > 
> > * "Configure a transport for each interface. The default transport will be the first one you choose."
> > I don't understand that second sentence. Does that mean the first transport in the configuration file is the default transport?
> > 
> > * Some "why" statements regarding the strategies for IPv4 and IPv6 would be useful. Why shouldn't an IPv6 wildcard be used, for instance?

It has been updated some.


- Joshua


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On Jan. 12, 2015, 1:33 p.m., Joshua Colp wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
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> 
> (Updated Jan. 12, 2015, 1:33 p.m.)
> 
> 
> Review request for Asterisk Developers.
> 
> 
> Repository: Asterisk
> 
> 
> Description
> -------
> 
> The transport selection process of PJSIP (and by extension some of our own logic) can be a dark dark thing. To help illuminate what happens I have created a wiki page[1] which goes through (based on the message type) the process by which a transport is chosen and how it can potentially change.
> 
> Stuff to look at:
> 1. Is this detailed enough?
> 2. Can you follow it? If not, how could it be made clearer?
> 3. Are there additional common issues that should be covered?
> 
> [1] https://wiki.asterisk.org/wiki/display/~jcolp/Transport+Selection
> 
> 
> Diffs
> -----
> 
> 
> Diff: https://reviewboard.asterisk.org/r/4328/diff/
> 
> 
> Testing
> -------
> 
> I opened the wiki page. It opened.
> 
> 
> Thanks,
> 
> Joshua Colp
> 
>

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