Error during Onvif.connect

[LODYZ]

Error during Onvif.connect

[faithoflifedev]

Hi @LODYZ , I really don't know what's happening with that connection issue. I've read here - https://dart.dev/tools/pub/troubleshoot - that anti-virus software can cause the issue.

I also found that one of the code changes that you referred to here - LODYZ@aed87fa - did not make it into the new build. I've published v2.1.0-dev.9 that includes the change.

[LODYZ]

Hi @faithoflifedev, i've inspected the situation and probably found the problem.

Using the Flutter DevTools i noticed that:
3 post calls:

1. getSystemDateAndTime -> response 200

<?xml version="1.0" encoding="UTF-8"?><s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing"><s:Header/><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><GetSystemDateAndTime xmlns="http://www.onvif.org/ver10/device/wsdl"/></s:Body></s:Envelope>

2. GetServices -> response 500
   request:
   <?xml version="1.0" encoding="UTF-8"?><s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing"><s:Header/><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><GetServices xmlns="http://www.onvif.org/ver10/device/wsdl"><IncludeCapability>true</IncludeCapability></GetServices></s:Body></s:Envelope>
   response:
   <?xml version="1.0" encoding="UTF-8"?> <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope" xmlns:SOAP-ENC="http://www.w3.org/2003/05/soap-encoding" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:chan="http://schemas.microsoft.com/ws/2005/02/duplex" xmlns:wsa5="http://www.w3.org/2005/08/addressing" xmlns:c14n="http://www.w3.org/2001/10/xml-exc-c14n#" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" xmlns:xenc="http://www.w3.org/2001/04/xmlenc#" xmlns:wsc="http://schemas.xmlsoap.org/ws/2005/02/sc" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:ns2="http://www.onvif.org/ver10/pacs" xmlns:xmime="http://tempuri.org/xmime.xsd" xmlns:xop="http://www.w3.org/2004/08/xop/include" xmlns:tt="http://www.onvif.org/ver10/schema" xmlns:wsrfbf="http://docs.oasis-open.org/wsrf/bf-2" xmlns:wstop="http://docs.oasis-open.org/wsn/t-1" xmlns:wsrfr="http://docs.oasis-open.org/wsrf/r-2" xmlns:ns1="http://www.onvif.org/ver10/accesscontrol/wsdl" xmlns:ns3="http://www.onvif.org/ver10/actionengine/wsdl" xmlns:tad="http://www.onvif.org/ver10/analyticsdevice/wsdl" xmlns:tds="http://www.onvif.org/ver10/device/wsdl" xmlns:timg="http://www.onvif.org/ver20/imaging/wsdl" xmlns:tptz="http://www.onvif.org/ver20/ptz/wsdl" xmlns:trc="http://www.onvif.org/ver10/recording/wsdl" xmlns:trt="http://www.onvif.org/ver10/media/wsdl" xmlns:trv="http://www.onvif.org/ver10/receiver/wsdl" xmlns:tse="http://www.onvif.org/ver10/search/wsdl" xmlns:vifsvr="http://www.onvif.org/ver10/events/wsdl/PullPointSubscriptionBinding" xmlns:vifsvr10="http://www.onvif.org/ver20/analytics/wsdl/AnalyticsEngineBinding" xmlns:vifsvr2="http://www.onvif.org/ver10/events/wsdl/EventBinding" xmlns:tev="http://www.onvif.org/ver10/events/wsdl" xmlns:vifsvr3="http://www.onvif.org/ver10/events/wsdl/SubscriptionManagerBinding" xmlns:vifsvr4="http://www.onvif.org/ver10/events/wsdl/NotificationProducerBinding" xmlns:vifsvr5="http://www.onvif.org/ver10/events/wsdl/NotificationConsumerBinding" xmlns:vifsvr6="http://www.onvif.org/ver10/events/wsdl/PullPointBinding" xmlns:vifsvr7="http://www.onvif.org/ver10/events/wsdl/CreatePullPointBinding" xmlns:vifsvr8="http://www.onvif.org/ver10/events/wsdl/PausableSubscriptionManagerBinding" xmlns:wsnt="http://docs.oasis-open.org/wsn/b-2" xmlns:vifsvr9="http://www.onvif.org/ver20/analytics/wsdl/RuleEngineBinding" xmlns:tan="http://www.onvif.org/ver20/analytics/wsdl" xmlns:ter="http://www.onvif.org/ver10/error" xmlns:tns1="http://www.onvif.org/ver10/topics"><SOAP-ENV:Header></SOAP-ENV:Header><SOAP-ENV:Body><SOAP-ENV:Fault><SOAP-ENV:Code><SOAP-ENV:Value>ter:Unauthorized</SOAP-ENV:Value><SOAP-ENV:Subcode><SOAP-ENV:Value>ter:Unauthorized</SOAP-ENV:Value></SOAP-ENV:Subcode></SOAP-ENV:Code><SOAP-ENV:Reason><SOAP-ENV:Text xml:lang="en">**Sender not Authorized**</SOAP-ENV:Text></SOAP-ENV:Reason></SOAP-ENV:Fault></SOAP-ENV:Body></SOAP-ENV:Envelope>
3. GetCapabilities -> response 500 (like the previous point)

At this point i compared this connection phase with "my" v2.0.13+19 version.
Here the request also contains authentication in the header:

<?xml version="1.0" encoding="UTF-8"?> <s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing"> <s:Header> <Security xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" s:mustUnderstand="1"> <UsernameToken> <Username>replaced</Username> <Password Type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordDigest">replaced=</Password> <Nonce EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary">replaced==</Nonce> <Created xmlns="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">2023-03-13T22:41:41.000143Z </Created> </UsernameToken> </Security> </s:Header> <s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <GetServices xmlns="http://www.onvif.org/ver10/device/wsdl"> <IncludeCapability>true</IncludeCapability> </GetServices> </s:Body> </s:Envelope>

In conclusion i think this famous "Connection closed while receiving data" error is simply an authentication problem.

I hope it could be useful. Let me know if you find a match.
Thanks in advance

[faithoflifedev]

@LODYZ, I think we have some progress here. It looks like the device you are using requires an authenticated header for the GetServices request, while all the devices that I've tested to date do not require this. I've now published v2.1.0-dev.10 that adds the authenticated header when making the request.

Let me know if this resolves the issue for you.

[LODYZ]

Hi @faithoflifedev, problem solved 🎉

[faithoflifedev]

Hi @LODYZ,

I've finally gotten access to a device that allowed me to recreate this issue for a specific Onvif command. For the media2.getStreamUri request, the Onvif supplied wsdl description wasn't updated properly to match the official spec - https://www.onvif.org/specs/srv/media/ONVIF-Media2-Service-Spec.pdf - so the SOAP request the code was building was incorrect and some devices like the Lorex LNB4421SB throw a "Connection closed" error rather than the documented env:Sender - ter:InvalidArgVal that would actually be useful.

Even though this wasn't your specific issue, I'm adding this here so that the related issue is at least somewhat documented. The moral of the story is that there are errors in the spec documents and also bad spec implementations on devices that cause a double whammy for troubleshooting.

The next release will have the "Connection closed" issue resolved for and media2.getStreamUri requests.