flow_dissector: Add PPPoE dissectors

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Allow to dissect PPPoE specific fields which are:
- session ID (16 bits)
- ppp protocol (16 bits)
- type (16 bits) - this is PPPoE ethertype, for now only
  ETH_P_PPP_SES is supported, possible ETH_P_PPP_DISC
  in the future

The goal is to make the following TC command possible:

  # tc filter add dev ens6f0 ingress prio 1 protocol ppp_ses \
      flower \
        pppoe_sid 12 \
        ppp_proto ip \
      action drop

Note that only PPPoE Session is supported.

Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Acked-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

...

This commit is contained in:

Wojciech Drewek 2022-07-18 14:18:10 +02:00 • committed by Tony Nguyen

parent 35d099da41

commit 46126db9c8

3 changed files with 73 additions and 7 deletions

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14

include/linux/ppp_defs.h

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13

include/net/flow_dissector.h

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61

net/core/flow_dissector.c

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