Missing support for `option forwarded` (RFC 7239) in Dataplane API (v3.1.0)

[m-a-rahal-os]

Hello !

The option forwarded (RFC 7239) doesn't seem to be supported in HAProxy Dataplane API v3.1.0 — unlike option forwardfor, which is properly handled.

I searched everywhere for it:

1. Not mentioned in API specification (v3)
2. Not found in source code: when searching for "forwarded", all 10 results are not related this feature.
3. When manually adding "option forwarded" to my backend config, the GET backend call doesn't detect it at all, here's an example:
   HAProxy version 3.2.0-1
   HAProxy Data Plane API v3.1.5 6934995

backend backend_name1 from unnamed_defaults_1
  mode http
  option forwarded

With this, the endpoint (GET /v3/services/haproxy/configuration/backends/backend_name1) returns:

{
  "from": "unnamed_defaults_1",
  "mode": "http",
  "name": "backend_name1"
}

But option forwardfor is parsed correctly:

GET /v3/services/haproxy/configuration/backends/backend_name1 returns:

{
  "forwardfor": {
    "enabled": "enabled"
  },
  "from": "unnamed_defaults_1",
  "mode": "http",
  "name": "backend_name1"
}

---

Related issues

• Problem in adding option inside backend #338: closed, but the responder seems to have mistaken the "forwarded" option for "forwardfor"

Thanks for your time !