Hello,
It seems that after InformResponse CWMP doesn’t send cookie anymore in the TCP session. Below is the detailed description. It can than result in 400 invalid session. This doesn’t seem as a CPE issue as CPE sends the Cookie in order of Session.
- CPE sends inform
- ACS replys with infrom response with cookie
- CPE reply with with cookie and content length 0
- ACS replys with GPV and no cookie
- CPE replys with result and cookie
- ACS replys with GPV and no cookie
- CPE replys with result and cookie
- ACS replys with no content and no cookie
This kind of behaviour will/might/should always result in invalid session. It is not vendor related. I also have a .pcap trace file recorded directly on the ACS server which I can share.
// CPE REQUEST
POST / HTTP/1.1
Host: 1.1.1.1:7547
User-Agent: BCM3383wvg–0813.1
Connection: keep-alive
SOAPAction:
Content-Type: text/xml
Content-Length: 2372
<SOAP-ENV:Envelope
xmlns:SOAP-ENV=“http://schemas.xmlsoap.org/soap/envelope/”
xmlns:SOAP-ENC=“http://schemas.xmlsoap.org/soap/encoding/”
xmlns:xsd=“http://www.w3.org/2001/XMLSchema”
xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance”
xmlns:cwmp=“urn:dslforum-org:cwmp-1-3”>
SOAP-ENV:Header
<cwmp:ID SOAP-ENV:mustUnderstand=“1”>300933305</cwmp:ID>
</SOAP-ENV:Header>
SOAP-ENV:Body
cwmp:Inform
Technicolor
28BE9B
CGA2121
383FB36280B6
6 CONNECTION REQUEST
1
2020-10-08T12:48:45
0
Device.DeviceInfo.HardwareVersion
1.0
Device.DeviceInfo.SoftwareVersion
CGA2121E-ES-13-E113C5-c7410r5714-190513
Device.DeviceInfo.ProvisioningCode
Device.ManagementServer.ConnectionRequestURL
http://1.1.1.1:7547/
Device.ManagementServer.ParameterKey
Device.ManagementServer.AliasBasedAddressing
false
</cwmp:Inform>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
// GENIEACS REPLY WITH COOKIE
HTTP/1.1 200 OK
Content-Length: 529
Server: GenieACS/1.2.2+20201008104452
SOAPServer: GenieACS/1.2.2+20201008104452
Content-Type: text/xml; charset=“utf-8”
Set-Cookie: session=6cc1828b629278c8
Date: Thu, 08 Oct 2020 10:48:55 GMT
Connection: keep-alive
<soap-env:Envelope xmlns:soap-enc=“http://schemas.xmlsoap.org/soap/encoding/” xmlns:soap-env=“http://schemas.xmlsoap.org/soap/envelope/” xmlns:xsd=“http://www.w3.org/2001/XMLSchema” xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance” xmlns:cwmp=“urn:dslforum-org:cwmp-1-3”>soap-env:Header<cwmp:ID soap-env:mustUnderstand=“1”>300933305</cwmp:ID></soap-env:Header>soap-env:Bodycwmp:InformResponse1</cwmp:InformResponse></soap-env:Body></soap-env:Envelope>
// CPE REPLY WITH COOKIE
POST / HTTP/1.1
Host: 1.1.1.1:7547
User-Agent: BCM3383wvg–0813.1
Connection: keep-alive
Cookie: session=6cc1828b629278c8
Content-Length: 0
// GENIEACS REPLY WITH NO COOKIE
HTTP/1.1 200 OK
Content-Length: 643
Server: GenieACS/1.2.2+20201008104452
SOAPServer: GenieACS/1.2.2+20201008104452
Content-Type: text/xml; charset=“utf-8”
Date: Thu, 08 Oct 2020 10:48:55 GMT
Connection: keep-alive
<soap-env:Envelope xmlns:soap-enc=“http://schemas.xmlsoap.org/soap/encoding/” xmlns:soap-env=“http://schemas.xmlsoap.org/soap/envelope/” xmlns:xsd=“http://www.w3.org/2001/XMLSchema” xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance” xmlns:cwmp=“urn:dslforum-org:cwmp-1-3”>soap-env:Header<cwmp:ID soap-env:mustUnderstand=“1”>17507d3ff8b0000</cwmp:ID></soap-env:Header>soap-env:Bodycwmp:GetParameterValuesDevice.IP.Interface.1.IPv4Address.1.IPAddress</cwmp:GetParameterValues></soap-env:Body></soap-env:Envelope>
// CPE REPLY WITH COOKIE
POST / HTTP/1.1
Host: 1.1.1.1:7547
User-Agent: BCM3383wvg–0813.1
Connection: keep-alive
SOAPAction:
Cookie: session=6cc1828b629278c8
Content-Type: text/xml
Content-Length: 758
<SOAP-ENV:Envelope
xmlns:SOAP-ENV=“http://schemas.xmlsoap.org/soap/envelope/”
xmlns:SOAP-ENC=“http://schemas.xmlsoap.org/soap/encoding/”
xmlns:xsd=“http://www.w3.org/2001/XMLSchema”
xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance”
xmlns:cwmp=“urn:dslforum-org:cwmp-1-3”>
SOAP-ENV:Header
<cwmp:ID SOAP-ENV:mustUnderstand=“1”>17507d3ff8b0000</cwmp:ID>
</SOAP-ENV:Header>
SOAP-ENV:Body
cwmp:GetParameterValuesResponse
Device.IP.Interface.1.IPv4Address.1.IPAddress
1.1.1.1
</cwmp:GetParameterValuesResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
// GENIEACS REPLY WITH NO COOKIE
HTTP/1.1 200 OK
Content-Length: 801
Server: GenieACS/1.2.2+20201008104452
SOAPServer: GenieACS/1.2.2+20201008104452
Content-Type: text/xml; charset=“utf-8”
Date: Thu, 08 Oct 2020 10:48:55 GMT
Connection: keep-alive
<soap-env:Envelope xmlns:soap-enc=“http://schemas.xmlsoap.org/soap/encoding/” xmlns:soap-env=“http://schemas.xmlsoap.org/soap/envelope/” xmlns:xsd=“http://www.w3.org/2001/XMLSchema” xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance” xmlns:cwmp=“urn:dslforum-org:cwmp-1-3”>soap-env:Header<cwmp:ID soap-env:mustUnderstand=“1”>17507d3ff8b0100</cwmp:ID></soap-env:Header>soap-env:Bodycwmp:GetParameterValuesDevice.NAT.PortMapping.11.ExternalPortDevice.NAT.PortMapping.12.ExternalPortDevice.NAT.PortMapping.13.ExternalPortDevice.NAT.PortMapping.14.ExternalPort</cwmp:GetParameterValues></soap-env:Body></soap-env:Envelope>
// CPE REPLY WITH COOKIE
POST / HTTP/1.1
Host: 1.1.1.1:7547
User-Agent: BCM3383wvg–0813.1
Connection: keep-alive
SOAPAction:
Cookie: session=6cc1828b629278c8
Content-Type: text/xml
Content-Length: 1185
<SOAP-ENV:Envelope
xmlns:SOAP-ENV=“http://schemas.xmlsoap.org/soap/envelope/”
xmlns:SOAP-ENC=“http://schemas.xmlsoap.org/soap/encoding/”
xmlns:xsd=“http://www.w3.org/2001/XMLSchema”
xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance”
xmlns:cwmp=“urn:dslforum-org:cwmp-1-3”>
SOAP-ENV:Header
<cwmp:ID SOAP-ENV:mustUnderstand=“1”>17507d3ff8b0100</cwmp:ID>
</SOAP-ENV:Header>
SOAP-ENV:Body
cwmp:GetParameterValuesResponse
Device.NAT.PortMapping.14.ExternalPort
8080
Device.NAT.PortMapping.13.ExternalPort
7547
Device.NAT.PortMapping.12.ExternalPort
7547
Device.NAT.PortMapping.11.ExternalPort
161
</cwmp:GetParameterValuesResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
// GENIEACS REPLY WITH NO COOKIE
HTTP/1.1 204 No Content
Content-Length: 0
Server: GenieACS/1.2.2+20201008104452
SOAPServer: GenieACS/1.2.2+20201008104452
Connection: close
Date: Thu, 08 Oct 2020 10:48:55 GMT