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Handle traffic redirection PCF policy

Rohan requested to merge redirct-policy into develop

  • This MR adds support for handling policy with traffic redirection support based on type URL.

  • Redirection is tested with single vpp upf scenario. Refer basic-vpp-pcf-redirection.yaml for more details.

oai-cn5g-fed/docker-compose$ docker exec -it gnbsim-vpp curl --interface 12.1.1.2 google.com
<!DOCTYPE html>
<html>
<!--
<?xml version="1.0" encoding="UTF-8"?><WISPAccessGatewayParam xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://www.acmewisp.com/WISPAccessGatewayParam.xsd"><Proxy><MessageType>110</MessageType><ResponseCode>200</ResponseCode><NextURL>facebook.com</NextURL></Proxy></WISPAccessGatewayParam>
-->
   <head>
      <title>Redirection</title>
      <meta http-equiv="refresh" content="0; URL=facebook.com">
   </head>
   <body>
      Please <a href='facebook.com'>click here</a> to continue
   </body>
</html>
  • How to configure redirection policy 
- flowDescription: permit out ip from any to assigned
redirection-scenario:
  redirectInfo:
    redirectEnabled: true
    redirectAddressType: URL
    redirectServerAddress: facebook.com
  • We can restrict destination in flowDescription to pertucular destination (e.g. UE ---> 8.8.8.8) as below, but it will only handle packets with this destination. And we need one more low precedence PDR/FAR to handle rest of the traffic. This is out of the scope currently.
- flowDescription: permit out ip from 8.8.8.8 to assigned
Edited by Rohan

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