Re: [Linphone-users] Linphone-users Digest, Vol 113, Issue 16

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Today's Topics:

   1. intermittant problems in using sip proxy (neeraj gupta)
   2. Getting Linphone to lookup SRV records in a DNS    zone as well
as a NAPTR record (Swinney C.)

----------------------------------------------------------------------

Message: 1
Date: Thu, 26 Apr 2012 14:08:02 -0700 (PDT)
From: neeraj gupta <address@hidden>
To: address@hidden
Subject: [Linphone-users] intermittant problems in using sip proxy
Message-ID:
    <address@hidden>
Content-Type: text/plain; charset="us-ascii"

Hello

I face the following problems sometimes (at this time I am facing the problems):

1. I do get Registration successful (nguptalap2) on my laptop
2. I do get Registration successful (nguptaph) or (nguptaph1) on my smart phone.

But when I try to make a call from nguptalap2 to nguptaph or nguptaph1 I get User not found
Similarly if I try to make a call from nguptaph or nguptaph1 to nguptalap2 I get User not found error

Second problem: the smart phone sentds Options message and receives Authentication required response from the proxy.

Any help in this would be appreciated.

Thanks

Neeraj Gupta
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Message: 2
Date: Fri, 27 Apr 2012 00:38:56 +0100
From: "Swinney C." <address@hidden>
To: <address@hidden>
Subject: [Linphone-users] Getting Linphone to lookup SRV records in a
    DNS    zone as well as a NAPTR record
Message-ID:
    <address@hidden>

Content-Type: text/plain; charset="us-ascii"

Hi All,

We have been trialling several SIP client and whilst LinPhone looks
quite good, there seems to be a drawback in its implementation when
trying to resolve SIP URI domain names to get the registered SIP service
for that domain name.

We have only added SRV records to the DNS zone in order to point SIP URI
lookups to our SIP service. We have register both UDP and TCP on 5060 to
point to the public interface for our SIP entrance gatekeeper.

However, when you make a SIP call in LinPhone using a URI (e.g.
address@hidden), LinPhone first gets the local DNS servers then tries to
look up a NAPTR record. When this fails, LinPhone simply appends 5060 to
the domain name lookup which resolve to the standard A host record. Of
course, the IP address resolved is actually pointing to the wrong server
- in fact the web server.

Other SIP clients do not seem to have this issue and resolve the correct
IP address from the SRV record as expected.

Example debug output from LinPhone:

---------------------------------------------------------------------

message: eXosip_dnsutils_naptr: DNS server (0): localdnssrv.com

message: eXosip_dnsutils_naptr_lookup: About to ask for domain.com
NAPTR'

message: DNS resolution with domain.com:5060

message: getaddrinfo returned the following addresses:

message: x.x.x.x port 5060 --------------------------- (Resolved IP
address of web server on A record)

message: Message sent: (to dest=x.x.x.x:5060)

------------------------------------------------------------------------
-------

Is there any way to force LinPhone to lookup the SRV record instead of
the NAPTR record, or should we have NAPTR records in our DNS zone as
well? We also utilise H.323 and IAX.

Cheers,

Chris

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End of Linphone-users Digest, Vol 113, Issue 16
***********************************************

From:	neeraj gupta
Subject:	Re: [Linphone-users] Linphone-users Digest, Vol 113, Issue 16
Date:	Fri, 27 Apr 2012 11:21:41 -0700 (PDT)