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989bf80fe8
* Support controller user attribution in audit logs
This PR supports associating audit logs with the controller user.
## Implementation:
- Add `ControlledContext { conn_audit_token }` to `PunchHole`, `RequestRelay`, and `FetchLocalAddr`.
- The server sends a controller-user identity snapshot to the controlled client through rendezvous messages.
- The controlled client sends the token back to the server when posting the `on_open` conn audit or IP whitelist alarm audit.
- This lets the server attach the controller user to audit logs.
## How the controlled client helps identify the controller user:
- Conn audit: sends the token to the server in `on_open`; the server creates the audit log and caches the user snapshot.
- File audit: sends `id` and `conn_id`; the server uses them to find the cached user snapshot.
- Alarm audit: IP whitelist sends the token directly; other alarm logs send `id` and `conn_id`, and the server uses them to find the cached user
snapshot.
## Compatibility:
- Supported only for logs created with a new server and a new controlled client.
- Does not require upgrading the controller client.
## Test
- [x] New/old clients connected to new/old servers, and conn/file/alarm audit logs worked normally.
- [x] New client connected to new server generated searchable conn/file/alarm audit logs.
- [x] Punch hole, local addr, and relay paths worked with audit logs and control role on new/old servers.
- [x] Direct IP connections produced audit logs, but do not support user audit.
Signed-off-by: 21pages <sunboeasy@gmail.com>
* rename conn_audit_token to conn_audit_ref
Signed-off-by: 21pages <sunboeasy@gmail.com>
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Signed-off-by: 21pages <sunboeasy@gmail.com>