Implement Forwarding Action Rules (FAR)

[navarrothiago]

The apply rules path diagram is available here.
Uplink data flow using GTP GPDU.

Test Case:

• CP: Create Packet Detection Rule (PDR)
• CP: Map Tunnel Endpoint ID (TEID) to PDR in userland
• CP: Map Session Endpoint ID (SEID) to Session in userland
• CP: Insert in the maps used to store PDRs by teid (key)
• Generate traffic GPDU traffic, filling the teid with the same value of the previous steps (see here for more details)
• UP:Filter GPDU in XDP
• UP: Restore the PDRs by TEID received from GPDU
• UP: For each PDR, match the PDRs attribuites accoding to data flow (UP, DL):
  • The TEID from GTP GPDU with the TEID stored in PDR.
  • Source IP from IP header with source address stored in PDI.
  • Interface from PDI with ACCESS or CORE interface (it depends on if it is UL or DL).
• UP: Restore the Session by SEID available in matched PDR
• UP: Apply the Forwarding Action Rules (FAR)
• CP: Check the output