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Re: [Linphone-developers] Linphone unable to resolve DNS correctly

From: Swinney C.
Subject: Re: [Linphone-developers] Linphone unable to resolve DNS correctly
Date: Thu, 27 Jun 2013 14:22:51 +0100

Hi All,

Can I take it from the lack of response that Linphone does not support
DNS SRV name resolution? If so, this is going to cause many problems and
simply will not work with many SIP deployments. Are there any future
plans to incorporate this into the client?


-----Original Message-----
From: address@hidden
On Behalf Of Swinney C.
Sent: 22 June 2013 23:06
To: address@hidden; address@hidden
Subject: [Linphone-developers] Linphone unable to resolve DNS correctly


We have tried to use Linphone to make calls to SIP user registered with
SIP address based on our root domain but it appears that the client
cannot resolve DNS entries correctly. 

We have SRV records in the root domain zone along with NAPTR records
such that:                 IN      SRV     0 0 1720                 IN      SRV     0 0 1719                            IN      SRV     0 0 5060                            IN      SRV     0 0 5060                           IN      SRV     0 0 5061      NAPTR   30 100 "S" "SIP+D2U" ""      NAPTR   20 100 "S" "SIP+D2T" ""      NAPTR   10 100 "S" "SIPS+D2T" ""

However, we also have an 'A' record in the root domain that points to an
IP address of the webserver. When trying to call anyone using
sip:address@hidden, Linphone is unable to resolve the server that will
handle SIP calls (i.e. and insists on trying to contact
the server in the A record.

Output from the Linphone debug shows:
message: eXosip_dnsutils_naptr_lookup: About to ask for
message: DNS resolution with
message: getaddrinfo returned the following addresses:
message: IP_Add_of_A_Record port 5060

This is an issue with Linphone as other clients (Cisco, Ekiga and
others) are able to request SRV records and interpret them correctly.

Is there any chance that Linphone can be developed to use DNS SRV
records as I don't see how it will be able to call SIP addresses based
on a root domain?



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