Qworum Enterprise specification, version 1.0
The use of Qworum in private networks requires a valid Enterprise license. The present specification describes the use cases that are covered by the license, and how user agents verify the validity of the license.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [Keywords].
A valid Enterprise license is required for calls (using the call statement) and redirections (using the goto statement) to Qworum services that are hosted inside a private network [IPaddress], except for direct calls by RPC clients which are always allowed. Localhost-to-localhost [Loopback] calls also do not require an Enterprise license.
If a call is forbidden according to these rules, then user agents MUST raise an authorization fault instead of performing the call.
In order to check the license status of the private network in which it is located, a user agent MUST send a POST request to the Enterprise License Validation Service at http://user-agent.qworum.com/mediator/enterprise. It then receives a response with the status code 200. The content type of both the request body and the response body is application/xml.
For example, a user agent might send the following request body to the Enterprise License Validation Service:
<message> <head> <!-- The user-agent element identifies the Qworum implementation, which may be a web browser, a web browser add-on, etc. --> <user-agent>email@example.com</user-agent> </head> </message>
If the private network from which the user agent is sending the request has a valid Enterprise license, then the Enterprise License Validation Service might send back a message such as the following in its response:
<message> <head> <address>220.127.116.11</address> </head> <body> <!-- Valid license --> <intranet cidr='18.104.22.168/29'> <expires>2012.12.31</expires> </intranet> </body> </message>
The address element contains the user agent's current IP address, as seen by the Enterprise License Validation Service. The private network associated to the Enterprise license is identified by its IP address block in CIDR notation [CIDR].
If the private network from which the user agent is sending the request does not have a valid Enterprise license, then there are two possibilities.
If the Enterprise License Validation Service has a private network that matches the user agent's current IP address in its database, but the private network does not have a valid Enterprise license, then the service might send a message such as the following in its response:
<message> <head> <address>22.214.171.124</address> </head> <body> <!-- Expired license --> <intranet cidr='126.96.36.199/29'> <expires>none</expires> </intranet> </body> </message>
Finally, if the Enterprise License Validation Service does not have a private network that matches the user agent's current IP address in its database, then it might send a message such as the following in its response:
<message> <head> <address>188.8.131.52</address> </head> <!-- Unknown private network --> </message>
In this case, the user agent MUST assume that the private network has only one internet IP address assigned to it (as indicated by the address element), and that it does not have a valid Enterprise license.
User agents which implement the present version of the Qworum Enterprise specification MUST NOT implement any other system wherein the right to call Qworum services hosted in private networks can be purchased.
|[XML]||Tim Bray, Jean Paoli, C. M. Sperberg-McQueen, Eve Maler, François Yergeau, Extensible Markup Language (XML), W3C Recommendation|
|[Keywords]||Bradner, B., Key words for use in RFCs to Indicate Requirement Levels, RFC 2119|
|[Loopback]||Loopback IP address|
|[CIDR]||V. Fuller, T. Li, Classless Inter-domain Routing (CIDR): The Internet Address Assignment and Aggregation Plan, RFC 4632|
|2011.10.25||Changed Enterprise License Validation Service host to user-agent.qworum.com.|
|2011.09.11||Added support for RPC clients.|
|2010.10.25||Message format changed (private networks are now identified by their IP address block, contract identifiers are no longer used).|
© Copyright 2010 Doğa Armangil. All Rights Reserved.
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