[Freeswitch-users] NAPTR and TCP transport

Lawrence Conroy lconroy at insensate.co.uk
Tue Nov 10 03:25:13 MSK 2015 

Hi again,
 I sure hope that Sofia doesn't treat the flag as case sensitive.
SIP NAPTRs were specified in RFC3263. That in turn called up the overall NAPTR definition (at the time), which was in RFC2915.
In 2915 (section2, page 4), it do say:
"   Flags
      A <character-string> containing flags to control aspects of the
      rewriting and interpretation of the fields in the record.  Flags
      are single characters from the set [A-Z0-9].  The case of the
      alphabetic characters is not significant.
"

Honestly, if those records are wrong I'm going blind: the NAPTRs look OK to me (as do the SRVs to which they point).
From the log, sofia does consider the TCP NAPTR, but rejects it (maybe 'cos the URI didn't have a transport value).
Sure your fine chaps have changed a lot in fS, but .... see <http://sofia-sip.sourceforge.net/refdocs/tport/>

atb,  Lawrence


On 9 Nov 2015, at 23:48, Brian West <brian at freeswitch.org> wrote:

> can you change "S" to "s" in your record and test again please.
> 
> On Mon, Nov 9, 2015 at 5:35 PM, Stanislav Sinyagin <ssinyagin at gmail.com> wrote:
> sure, you can send your calls any time to:
> 
> sip:attendant at demo.voxserv.net
> sip:attendant at tdemo.voxserv.net
> 
> or create NAPTR records in your own domain which point to my SRV records.
> 
> But so far, I couldn't find any error in the syntax, and the UDP record actually works.
> 
> 
> 
> 
> 
> 
> On Tue, Nov 10, 2015 at 12:29 AM, Brian West <brian at freeswitch.org> wrote:
> I think your NAPTR records are wrong.  I'll double check.
> 
> On Mon, Nov 9, 2015 at 5:24 PM, Stanislav Sinyagin <ssinyagin at gmail.com> wrote:
> Brian, it doesn't look like there's a dependency on priority and weight:  the domain "tdemo.voxserv.net" has only one NAPTR record, and it's not taken into account. I will file a jira ticket for this.
> 
> 
> sres.c:3572 sres_log_response() sres_resolver_receive(0xb5001798, 0xb5075bd8) id=32124 (from [10.1.31.38]:53)
> nta.c:10465 outgoing_answer_naptr() nta: tdemo.voxserv.net. IN NAPTR 100 100 "S" "SIP+D2T" "" _sip._tcp.demo.voxserv.net. (tport not used)
> nua_stack.c:271 nua_stack_event() nua(0xb5637938): event r_invite 503 DNS Error
> 
> On Mon, Nov 9, 2015 at 9:15 PM, Brian West <brian at freeswitch.org> wrote:
> Set the priority to 0  (tcp) and 20 (udp), then the weight to 0 on both.  Then swap the priorities and see if sofia is just dyslexic 
> 
> 
> /b
> 
> On Mon, Nov 9, 2015 at 12:01 PM, Lawrence Conroy <lconroy at insensate.co.uk> wrote:
> Hi again,
>  thanks for putting up the tdemo zone.
> Looking at your log, fS DOES get both NAPTRs and process them in the correct order. fS *is* doing the sorting, as your DNS server appears to round robin randomisation on the records in the DNS. Good news: fS gets and parses the DNS correctly; Bad news: behaviour must be in the bowels of Sofia :/
> all the best & thanks
>   Lawrence
> 
> On 9 Nov 2015, at 16:59, Stanislav Sinyagin <ssinyagin at gmail.com> wrote:
> 
> > the user at domain is a remote SIP URI, and the DNS points to port 5080 on the remote server.
> >
> > Here's sofia loglevel 9. It receives two NAPTR records, and takes the one for SIP. It prints "tport not used" -- probably that's the clue why it doesn't try to use TCP.
> >
> >
> >
> >
> > sres.c:3572 sres_log_response() sres_resolver_receive(0x17af08, 0x1a3ff8) id=36650 (from [10.1.31.38]:53)
> > nta.c:10465 outgoing_answer_naptr() nta: demo.voxserv.net. IN NAPTR 100 100 "S" "SIP+D2T" "" _sip._tcp.demo.voxserv.net. (tport not used)
> > nta.c:10465 outgoing_answer_naptr() nta: demo.voxserv.net. IN NAPTR 110 100 "S" "SIP+D2U" "" _sip._udp.demo.voxserv.net.
> > sres_cache.c:272 sres_cache_get() sres_cache_get(0x164408, SRV, "_sip._udp.demo.voxserv.net.") called
> > sres_cache.c:318 sres_cache_get() sres_cache_get(0x164408, SRV, "_sip._udp.demo.voxserv.net.") returned 1 entries
> > nta.c:10598 outgoing_query_srv() nta: for "demo.voxserv.net" query "_sip._udp.demo.voxserv.net." SRV (cached)
> > nta.c:10694 outgoing_answer_srv() nta: _sip._udp.demo.voxserv.net. IN SRV 10 0  5080 ph02.trrtrr.net. (udp)
> >
> >
> >
> >
> > On Mon, Nov 9, 2015 at 5:36 PM, Brian West <brian at freeswitch.org> wrote:
> > sofia loglevel all 9, watch the debug, is user at domain locally registered or a remote user/domain?
> >
> > On Mon, Nov 9, 2015 at 9:45 AM, Stanislav Sinyagin <ssinyagin at gmail.com> wrote:
> > the records are actually documented here, and you can feel free to
> > send calls to these extensions:
> > http://voxserv.ch/demolab.html
> >
> > The "tdemo.voxserv.net" points to the same service, but for TCP only.
> >
> >
> >
> >
> > On Mon, Nov 9, 2015 at 4:00 PM, Lawrence Conroy <lconroy at insensate.co.uk> wrote:
> > > Hi there,
> > >  from experience of running NAPTR record interops, it was common for libraries/apps to ignore the "weights" and just take the first record in the DNS message.
> > > [I don't have recent fS source to hand to check].
> > >
> > > More interesting is your comment that, with a single NAPTER, fS silently fails.
> > > Perhaps give an example by removing the 100/110 udp NAPTR (just leaving the tcp NAPTR)?
> > > [and flushing the fS local DNS cache, of course :]
> > >
> > > all the best,
> > >   Lawrence
> > >
> > >
> > > On 9 Nov 2015, at 13:17, Stanislav Sinyagin <ssinyagin at gmail.com> wrote:
> > >
> > >> $ dig naptr demo.voxserv.net
> > >>
> > >> ; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> naptr demo.voxserv.net
> > >> ;; global options: +cmd
> > >> ;; Got answer:
> > >> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19044
> > >> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
> > >>
> > >> ;; QUESTION SECTION:
> > >> ;demo.voxserv.net.              IN      NAPTR
> > >>
> > >> ;; ANSWER SECTION:
> > >> demo.voxserv.net.       600     IN      NAPTR   110 100 "S" "SIP+D2U" "" _sip._udp.demo.voxserv.net.
> > >> demo.voxserv.net.       600     IN      NAPTR   100 100 "S" "SIP+D2T" "" _sip._tcp.demo.voxserv.net.
> > >>
> > >> ;; Query time: 206 msec
> > >> ;; SERVER: 91.214.168.168#53(91.214.168.168)
> > >> ;; WHEN: Mon Nov  9 14:17:30 2015
> > >> ;; MSG SIZE  rcvd: 144
> > >>
> > >>
> > >>
> > >>
> > >> On Mon, Nov 9, 2015 at 1:41 PM, Brian West <brian at freeswitch.org> wrote:
> > >> You're in a NAPTR records may be incorrect, example pleas
> > >>
> > >>
> > >> On Monday, November 9, 2015, Stanislav Sinyagin <ssinyagin at gmail.com> wrote:
> > >> If I specify a bridge destination as "sofia/external/USER at DOMAIN", and
> > >> that domain has a NAPTR record specifying TCP transport as more
> > >> preferred, FreeSWITCH is still sending a UDP INVITE.
> > >>
> > >> If the domain has only a NAPTR record for TCP transport, the call
> > >> fails without sending any INVITE.
> > >>
> > >> It works with TCP if I add ";transport=tcp" to the bridge string.
> > >>
> > >> does this look like a bug, or it was set so with some reason?
> > >>
> > >> _________________________________________________________________________
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> > >> --
> > >> Brian West
> > >> brian at freeswitch.org
> > >>
> > >>
> > >>
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> > >>
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> > >>
> > >>
> > >>
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> > >
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> >
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> >
> > --
> > Brian West
> > brian at freeswitch.org
> >
> >
> >
> > Twitter: @FreeSWITCH , @briankwest
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> >
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> >
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> >
> >
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> >
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> 
> _________________________________________________________________________
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> 
> 
> -- 
> Brian West
> brian at freeswitch.org
> 
> 
> 
> Twitter: @FreeSWITCH , @briankwest
> http://www.freeswitchbook.com
> http://www.freeswitchcookbook.com
> 
> Got Bugs? Report them here! | Reddit: /r/freeswitch
> 
> T:+19184209001 | F:+19184209002 | M:+1918424WEST (9378)
> iNUM:+883 5100 1420 9001 | ISN:410*543 | Skype:briankwest
> 
> 
> _________________________________________________________________________
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> 
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> 
> _________________________________________________________________________
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> 
> 
> -- 
> Brian West
> brian at freeswitch.org
> 
> 
> 
> Twitter: @FreeSWITCH , @briankwest
> http://www.freeswitchbook.com
> http://www.freeswitchcookbook.com
> 
> Got Bugs? Report them here! | Reddit: /r/freeswitch
> 
> T:+19184209001 | F:+19184209002 | M:+1918424WEST (9378)
> iNUM:+883 5100 1420 9001 | ISN:410*543 | Skype:briankwest
> 
> 
> _________________________________________________________________________
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> 
> _________________________________________________________________________
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> 
> 
> -- 
> Brian West
> brian at freeswitch.org
> 
> 
> 
> Twitter: @FreeSWITCH , @briankwest
> http://www.freeswitchbook.com
> http://www.freeswitchcookbook.com
> 
> Got Bugs? Report them here! | Reddit: /r/freeswitch
> 
> T:+19184209001 | F:+19184209002 | M:+1918424WEST (9378)
> iNUM:+883 5100 1420 9001 | ISN:410*543 | Skype:briankwest
> 
> _________________________________________________________________________
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