[SIP Beyond VoIP] Presence problems continuation

Hadzhiev, Tihomir tihomir.hadzhiev at acision.com
Tue Sep 18 16:22:58 CEST 2012


Hi Adrian,

I fully see this. However I'm still puzzled. As I have stated already, both the SIP <-> XMPP and MSRP <-> XMPP messaging is working for me. There for I'm puzzled. If the DNS settings were not correct, then the rest would not have worked either.

Also, the NOTIFY, in the error message, does this mean that  there is a SIP package Notify which cannot be sent correctly ?

Thanks,
Tihomir

From: Adrian Georgescu [mailto:ag at ag-projects.com]
Sent: Tuesday, September 18, 2012 4:19 PM
To: Hadzhiev, Tihomir
Cc: sipbeyondvoip at lists.ag-projects.com
Subject: Re: [SIP Beyond VoIP] Presence problems continuation

Error: No nameserver is in DNS resolver


On Sep 18, 2012, at 3:07 PM, Hadzhiev, Tihomir wrote:


The thing is indeed that this is a closed system, e.g. a Host system which runs the DNS, and a virtual machine which runs the Sylk and the Presence. So I'm getting confused now with the explanation below. Indeed nobody changes the DNS entries :)

Tiho

From: Adrian Georgescu [mailto:ag at ag-projects.com]
Sent: Tuesday, September 18, 2012 2:03 PM
To: Hadzhiev, Tihomir
Cc: sipbeyondvoip at lists.ag-projects.com<mailto:sipbeyondvoip at lists.ag-projects.com>
Subject: Re: [SIP Beyond VoIP] Presence problems continuation

It looks like somebody is changing your DNS resolver and removes any name servers from your machine network configuration.

Find out who does this and get rid of it or use static DNS entries.

Adrian


On Sep 18, 2012, at 1:51 PM, Hadzhiev, Tihomir wrote:



Hi Adrian,

I have checked around and it happened that 1-st problem is that when my ISP user logs in , the Subscribe for the XMPP domain is not routed correctly towards SYLK.

That's done now and I can see in tcpdump, e.g. done correctly ( even though it forward also the Subscribe for the SIP domain ( 1 user though ).

But now the following problem appeared:

Starting factory <sylk.applications.xmppgateway.xmpp.DeferredS2SClientFactory object at 0x7f43cc5e9c90>
/etc/resolv.conf changed, reparsing
Resolver added ('10.226.20.240', 53) to server list
Resolver added ('10.226.32.45', 53) to server list
DNSDatagramProtocol starting on 62773
Starting protocol <twisted.names.dns.DNSDatagramProtocol object at 0x7f43cc9b7cd0>
[xmppgateway] Presence session established sip:alice at open-ims.test --> xmpp:tihoparvi at testing.com
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/twisted/internet/base.py", line 773, in runUntilCurrent
    f(*a, **kw)
  File "/root/src/sylkserver/sylk/applications/__init__.py", line 139, in handle_notification
    handler(notification)
  File "/root/src/sylkserver/sylk/applications/__init__.py", line 167, in _NH_SIPIncomingSubscriptionGotSubscribe
    app.incoming_subscription(subscribe_request, notification.data)
  File "/root/src/sylkserver/sylk/applications/xmppgateway/__init__.py", line 133, in incoming_subscription
    handler.add_sip_subscription(subscribe_request)
  File "/root/src/sylkserver/sylk/applications/xmppgateway/presence.py", line 88, in add_sip_subscription
    subscription.accept_pending()
  File "_core.subscription.pxi", line 507, in sipsimple.core._core.IncomingSubscription.accept_pending (sipsimple/core/_core.c:102989)
  File "_core.subscription.pxi", line 648, in sipsimple.core._core.IncomingSubscription._send_notify (sipsimple/core/_core.c:105185)
PJSIPError: Could not send NOTIFY request: No nameserver is in DNS resolver (PJLIB_UTIL_EDNSNONS)
[xmppgateway] Presence session established sip:alice at open-ims.test --> xmpp:tihovroti at testing.com
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/twisted/internet/base.py", line 773, in runUntilCurrent
    f(*a, **kw)
  File "/root/src/sylkserver/sylk/applications/__init__.py", line 139, in handle_notification
    handler(notification)
  File "/root/src/sylkserver/sylk/applications/__init__.py", line 167, in _NH_SIPIncomingSubscriptionGotSubscribe
    app.incoming_subscription(subscribe_request, notification.data)
  File "/root/src/sylkserver/sylk/applications/xmppgateway/__init__.py", line 133, in incoming_subscription
    handler.add_sip_subscription(subscribe_request)
  File "/root/src/sylkserver/sylk/applications/xmppgateway/presence.py", line 88, in add_sip_subscription
    subscription.accept_pending()
  File "_core.subscription.pxi", line 507, in sipsimple.core._core.IncomingSubscription.accept_pending (sipsimple/core/_core.c:102989)
  File "_core.subscription.pxi", line 648, in sipsimple.core._core.IncomingSubscription._send_notify (sipsimple/core/_core.c:105185)
PJSIPError: Could not send NOTIFY request: No nameserver is in DNS resolver (PJLIB_UTIL_EDNSNONS)
(UDP Port 62773 Closed)
Stopping protocol <twisted.names.dns.DNSDatagramProtocol object at 0x7f43cc9b7cd0>
Starting factory <sylk.applications.xmppgateway.xmpp.DeferredS2SClientFactory object at 0x7f43cca6d410>
DNSDatagramProtocol starting on 46209
Starting protocol <twisted.names.dns.DNSDatagramProtocol object at 0x7f43cca6d510>
(UDP Port 46209 Closed)
Stopping protocol <twisted.names.dns.DNSDatagramProtocol object at 0x7f43cca6d510>
Incoming connection 0 from u'testing.com' to u'open-ims.test' established
Stopping factory <sylk.applications.xmppgateway.xmpp.DeferredS2SClientFactory object at 0x7f43cca6d410>
Outgoing connection 0 from u'open-ims.test' to u'testing.com' established
error: Exception occured in observer <sylk.applications.xmppgateway.presence.S2XPresenceHandler object at 0x7f43cc5ed9d0> while handling notification 'XMPPSubscriptionChangedState'
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/application/notification.py", line 216, in post_notification
    observer.handle_notification(notification)
  File "/root/src/sylkserver/sylk/applications/xmppgateway/presence.py", line 137, in handle_notification
    handler(notification)
  File "/root/src/sylkserver/sylk/applications/xmppgateway/presence.py", line 153, in _NH_XMPPSubscriptionChangedState
    subscription.accept(content_type, pidf_doc)
  File "_core.subscription.pxi", line 534, in sipsimple.core._core.IncomingSubscription.accept (sipsimple/core/_core.c:103475)
  File "_core.subscription.pxi", line 648, in sipsimple.core._core.IncomingSubscription._send_notify (sipsimple/core/_core.c:105185)
PJSIPError: Could not send NOTIFY request: No nameserver is in DNS resolver (PJLIB_UTIL_EDNSNONS)


Attached is also full trace of all entities on SYLK.

Thanks,
Tiho



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