NAT type detection from a HTTP request

Hello there
I got two JAVA class : httpServer and httpClient. Running in two different machines. Server is listening to a HTTP port in one machine and on the other hand client is sending its machine IP from other PC to the server. But the client is behind a NAT. Now I can detect in my httpServer class that it is behind a NAT. I check the requesting IP and the IP send inside the packet payload. If they are different, I decide there is a NAT in between. But how can I know from such HTTP request-response what kind of NAT I am behind? This is important to know because with symmetric NAT
(http://en.wikipedia.org/wiki/Network_address_translation) , where the NAT binding also include the outgoing address as well, my application is having problem.
I have solution like STUN/TURN server implementation. But I would like to know the type of NAT my client is behind without any extra deployment such as STUN or TURN server.
Any suggestion to detect type of NAT without any extra deployment and merely from HTTP request-response JAVA APIs?
Mohammed Jubaer Arif.

Thanks
It seems you are asking me to configure the NAT, may be with some programming. Or may be I should run the server class on the NAT machine.
But my client and server classes will be all over the world. Thus I think it is not a practical solution to ask the NATs to assist me. The intelligence should be in my client and server messaging.
So I was wondering, is there any way out for me to get the NAT type with JAVA programming, in the server side once I get a request from the client side. But without any extra deployment.
But as you said �There's not much of NAT types.� :(
Mohammed Jubaer Arif

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003C2E [B2BCORE.0040.0001] HTTP/1.1 200
003C2F [B2BCORE.0064.0017] Proxy Header <--Connection established
003C30 [B2BCORE.0038.0002] --> POST /invoke/wm.b2b.cxml:receiveCXML HTTP/1.0
003C31 [B2BCORE.0038.0002] --> User-Agent: Mozilla/4.0 [en] (WinNT; I)
003C32 [B2BCORE.0038.0002] --> Accept: image/gif, /
003C33 [B2BCORE.0038.0002] --> Host: www.qab2b.xxx.com:443
003C34 [B2BCORE.0038.0002] --> Proxy-Authorization: Basic YWJ1c2luZXNzY29ubmVjdG9yOmFidXNpbjA0
003C35 [B2BCORE.0038.0002] --> Authorization: Basic U0ZSQ2VnZXRlbDoyMDA3KkVBSV9TRlI=
003C36 [B2BCORE.0038.0002] > Content-type: multipart/mixed; boundary="--=_Part_0_1941981.1219399983635"
003C37 [B2BCORE.0038.0002] --> Message-ID: <7159395.1219399983666.JavaMail.SYSTEM@sw0030>
003C38 [B2BCORE.0038.0002] --> Mime-Version: 1.0
003C39 [B2BCORE.0038.0002] --> Content-Length: 188225
003C3A [B2BCORE.0040.0001] HTTP/1.0 200
003C3B [B2BCORE.0041.0001] ssnid=86087kPxFCsECcmXU5DHUAInKY9mEIIU-9355222; path=/;
003C3C [B2BCORE.0038.0002] <-- Set-Cookie: ssnid=86087kPxFCsECcmXU5DHUAInKY9mEIIU-9355222; path=/;
003C3D [B2BCORE.0038.0002] <-- Content-Type: multipart/mixed; boundary="----=_Part_0_1941981.1219399983635"
003C3E [B2BCORE.0038.0002] <-- Connection: Close
003C3F [B2BCORE.0038.0002] <-- Content-Length: 0
003C40 [B2BCORE.0049.0008] Sequence : index=8 depth=3
003C41 [B2BCORE.0049.0008] Sequence : index=6 depth=2
003C42 [B2BCORE.0049.0008] Sequence : index=1 depth=3
003C43 [B2BCORE.0049.0005] Invoke : index=1 depth=4
003C44 [B2BCORE.0049.0008] Sequence : index=2 depth=3
003C45 [B2BCORE.0049.0005] Invoke : index=1 depth=4
003C46 [B2BCORE.0049.0008] Sequence : index=3 depth=3
003C47 [B2BCORE.0049.0005] Invoke : index=1 depth=4
003C48 [B2BSERV.0048.9999] Array index out of range: -1
003C49 [B2BCORE.0049.0008] Sequence : index=4 depth=3
003C4A [B2BCORE.0050.0004] Copy failed: (Simple) No source data available: to=/returnedStatusCode(0), from=/returnHttp(0)/cXML(0)/Response(0)/Status(0)/@code(0)
003C4B [B2BCORE.0050.0004] Copy failed: (Simple) No source data available: to=/returnedMessage(0), from=/returnHttp(0)/cXML(0)/Response(0)/Status(0)/*body(0)
003C4C [B2BCORE.0050.0004] Copy failed: (Simple) No source data available: to=/returnedText(0), from=/returnHttp(0)/cXML(0)/Response(0)/Status(0)/@text(0)
003C4D [B2BCORE.0049.0008] Sequence : index=5 depth=3
003C4E [B2BCORE.0049.0008] Sequence : index=6 depth=3
003C4F [B2BCORE.0049.0008] Sequence : index=7 depth=2
003C50 [B2BCORE.0049.0008] Sequence : index=2 depth=1
003C51 [B2BSERV.0056.0003] Unable to send mail. Illegal address
error java log on server>logs>error:
2008-08-22 12:16:33 CEST java.lang.ArrayIndexOutOfBoundsException: Array index out of range: -1
     at com.wm.util.List.elementAt(List.java:101)
     at com.wm.lang.xml.token.BlockInputBuffer.getChar(BlockInputBuffer.java:59)
     at com.wm.lang.xml.TextNode.appendSqueezedText(TextNode.java:178)
     at com.wm.lang.xml.ElementNode.appendSqueezedText(ElementNode.java:333)
     at com.wm.lang.xml.ElementNode.getTextOfChildren(ElementNode.java:309)
     at com.wm.lang.xml.Document.getTextOfChildren(Document.java:542)
     at com.wm.app.b2b.services.DocumentToRecordService.recursiveCollect(DocumentToRecordService.java:661)
     at com.wm.app.b2b.services.DocumentToRecordService.bind(DocumentToRecordService.java:356)
     at pub.web.documentToRecord(web.java:667)
     at java.lang.reflect.Method.invoke(Native Method)
     at com.wm.app.b2b.server.JavaService.baseInvoke(JavaService.java:281)
     at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:693)
     at com.wm.app.b2b.server.BaseService.invoke(BaseService.java:140)
     at com.wm.lang.flow.FlowInvoke.invoke(FlowInvoke.java:292)
     at com.wm.lang.flow.FlowState.invokeNode(FlowState.java:559)
     at com.wm.lang.flow.FlowState.step(FlowState.java:430)
     at com.wm.lang.flow.FlowState.invoke(FlowState.java:400)
     at com.wm.app.b2b.server.FlowSvcImpl.baseInvoke(FlowSvcImpl.java:1786)
     at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:693)
     at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:455)
     at com.wm.app.b2b.server.Service.doInvoke(Service.java:495)
     at com.wm.app.b2b.server.Service.doInvoke(Service.java:392)
     at wm.PartnerMgr.gateway.transport.B2B.OutboundProcess(B2B.java:157)
     at java.lang.reflect.Method.invoke(Native Method)
     at com.wm.app.b2b.server.JavaService.baseInvoke(JavaService.java:281)
     at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:693)
     at com.wm.app.b2b.server.BaseService.invoke(BaseService.java:140)
     at com.wm.lang.flow.FlowInvoke.invoke(FlowInvoke.java:292)
     at com.wm.lang.flow.FlowState.invokeNode(FlowState.java:559)
     at com.wm.lang.flow.FlowState.step(FlowState.java:430)
     at com.wm.lang.flow.FlowState.invoke(FlowState.java:400)
     at com.wm.app.b2b.server.FlowSvcImpl.baseInvoke(FlowSvcImpl.java:1786)
     at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:693)
     at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:455)
     at com.wm.app.b2b.server.Service.doInvoke(Service.java:495)
     at com.wm.app.b2b.server.Service.doInvoke(Service.java:464)
     at wm.PartnerMgr.gateway.runtime.InboundProcess(runtime.java:423)
     at pub.sap.transport.RFC.InboundProcess(RFC.java:190)
     at java.lang.reflect.Method.invoke(Native Method)
     at com.wm.app.b2b.server.JavaService.baseInvoke(JavaService.java:281)
     at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:693)
     at com.wm.app.b2b.server.ServiceManager.invoke(ServiceManager.java:455)
     at com.wm.app.b2b.server.Service.doInvoke(Service.java:495)
     at com.wm.app.b2b.server.Service.doInvoke(Service.java:464)
     at com.wm.pkg.sap.rfc.Listener.handleRequest(Listener.java:286)
     at com.sap.mw.jco.JCO$Server.dispatchRequest(JCO.java:6022)
     at com.sap.mw.idoc.jco.JCoIDoc$Server.dispatchRequest(JCoIDoc.java:10120)
     at com.wm.pkg.sap.rfc.Listener.dispatchRequest(Listener.java:186)
     at com.sap.mw.jco.rfc.MiddlewareRFC$Server.nativeListen(Native Method)
     at com.sap.mw.jco.rfc.MiddlewareRFC$Server.listen(MiddlewareRFC.java:1070)
     at com.sap.mw.jco.JCO$Server.listen(JCO.java:5797)
     at com.sap.mw.jco.JCO$Server.run(JCO.java:5731)
     at com.wm.pkg.sap.rfc.Listener.run(Listener.java:101)
     at java.lang.Thread.run(Thread.java:479)
Thanks for your support on this eai.
Regards,
Laurent.

ok, I think we do not need the save/loadPipeline things, because you can debug the flow without that. I first thought you act as HTTP server, but you issue the client call in the flow itself.
Looking at the logs more carefully, it shows for example:
Copy failed: (Simple) No source data available: to=/returnedStatusCode(0), from=/returnHttp(0)/cXML(0)/Response(0)/Status(0)/@code(0)
But you say have that input:
<?xml version="1.0"?>
<!DOCTYPE cXML SYSTEM "http://xml.cXML.org/schemas/cXML/1.2.011/cXML.dtd">
<cXML version="1.2.011" payloadID="20080825171850716.18637uTQ9ExzheaK+H6b7O9oCAQWPzHA-9355222.8b3632def70da7220004d0b6" timestamp="2008-08-25T17:18:50-CEST">
<Response>
<Status code="500">No cXML document received from sender.</Status>
</Response>
</cXML>
So we see that your mappings assumptions do not match the result structure.
The other problem is that you get a status 500 and do not receive a cXML document, but that might be ok, depending on what parameters you pass to the other HTTP server. At least, you get a meaningful error message back from the server, meaning communication is ok.
I suggest you first correct those "copy failed" issues and then check by single-stepping where exactly the flow fails and check that input again.
By the way, when I feed the above cXML into recordToDocument, it works fine. Did you specify other input parameters besides "node" (e.g. recordName) ? And again, are you on Core Fix 8 ?
CSY

Passing Cookies from Previous Web HTTP Request to the Next

Hi,
I have two Web Http Requests. The first one performs a Login and the second one executes another method called ListRecoveryPlans.
First SOAP calls for Login looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap-url>https://srm-app-003:9007</soap-url>
<connection>
<name>srm_connection_test_01</name>
<terminate-on-exit>false</terminate-on-exit>
</connection>
<SOAP-ENV:Body>
<urn:SrmLogin xmlns:urn="urn:srm0">
<urn:_this xmlns:urn="urn" type="SrmApi">Srm</urn:_this>
<urn:username>cisco\xxx</urn:username>
<urn:password>xxx</urn:password>
</urn:SrmLogin>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
The second soap looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap-url>https://srm-app-003:9007</soap-url>
<connection>
<name>srm_connection_test_01</name>
<terminate-on-exit>false</terminate-on-exit>
</connection>
<connectionCookie>
<name>
<xsl:text disable-output-escaping="no">DE78D964-DDF4-40B6-BCB7-BEB44624826D</xsl:text>
</name>
</connectionCookie>
<SOAP-ENV:Body>
<urn:ListRecoveryPlans xmlns:urn="urn:srm0">
<urn:_this xmlns:urn="urn" type="SrmApi">
<xsl:text disable-output-escaping="no">Srm</xsl:text>
</urn:_this>
</urn:ListRecoveryPlans>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
In addition, under the Cookies tab for the ListRecoveryPlans request, I passed the cookies from the previous request:
However, I am getting a "session is not authenticated" error.
The remote server returned an error: (500) Internal Server Error.
<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Body>
<soapenv:Fault><faultcode>ServerFaultCode</faultcode><faultstring>The session is not authenticated.</faultstring><detail><SecurityErrorFault xmlns="urn:srm0" xsi:type="SecurityError"></SecurityErrorFault></detail></soapenv:Fault>
</soapenv:Body>
</soapenv:Envelope>
Can you shed some light on how I can fix this issue? I am using CPO v. 2.2.0.1409.
Thank you.
Regards,
Mary Jane Cofino

Hi,
Thank you for the prompt reply.
For the first request, here is the response header I am getting
I checked the "Accept cookies from this request" checkbox button and am now getting a new error:
The remote server returned an error: (500) Internal Server Error.
<?xml version="1.0" encoding="UTF-8"?>
http://schemas.xmlsoap.org/soap/encoding/"
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
ServerFaultCodeThe object has already been deleted or has not been completely created
Regards,
Mary Jane Cofino

NAT type detection from a HTTP request

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