[SIP Beyond VoIP] Presence problems continuation

Adrian Georgescu ag at ag-projects.com
Tue Sep 18 14:03:17 CEST 2012


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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