feat(acl-filter,config): Add restriction for user ACLs "scope: flow"

[qmonnet]

For user ACLs, "scope: flow" is only supported when the peering uses either masquerade or port forwarding for each connection; otherwise, we do not currently track flow, and cannot apply flow-scoped rules.

Add the relevant restriction at validation time.

Link: #1625

[coderabbitai]

📝 Walkthrough

Walkthrough

Changes

ACL validation now restricts scope: flow to peering manifests with masquerade or port-forwarding support. Conversion tests pass explicit scope values, and filter tests use masquerade-backed overlays for related-flow behavior.

ACL flow-scope validation

Layer / File(s)	Summary
Flow-scope validation and coverage config/src/external/overlay/acl.rs	Validation uses shared ConfigResult, checks expose support for flow scope, and adds acceptance and rejection tests.
Scoped rule conversion fixtures config/src/converters/k8s/config/acl.rs	Conversion test helpers and call sites now pass explicit packet, flow, or unset scope values.

Masquerade-backed filter tests

Layer / File(s)	Summary
Related-flow filter coverage acl-filter/src/tests.rs	Adds a masquerade overlay builder and uses it for allowed-reply and explicit-deny flow-scope tests.

Possibly related issues

• githedgehog/dataplane#1651 — Directly covers validation of scope: flow against expose capabilities.

Possibly related PRs

• githedgehog/dataplane#1618 — Related ACL scope validation and conversion changes.
• githedgehog/dataplane#1634 — Implements dataplane enforcement for flow-scoped related-flow matching.

Suggested reviewers: fredi-raspall

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the new validation restriction for user ACLs with scope: flow.
Description check	✅ Passed	The description matches the change by explaining the new validation restriction and when scope: flow is supported.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@config/src/external/overlay/acl.rs`:
- Around line 421-424: Fix the format string in the ACL validation error
construction to close the rule name’s quote before the explanatory text,
preserving the existing self.name interpolation and message content.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 7a08a4e0-fdc1-4dc1-ba3b-8ab2814c636f

📥 Commits

Reviewing files that changed from the base of the PR and between fcdf254 and 2e7d576.

📒 Files selected for processing (3)

• acl-filter/src/tests.rs
• config/src/converters/k8s/config/acl.rs
• config/src/external/overlay/acl.rs

[Copilot]

Pull request overview

Adds config-time validation to reject user ACL rules with scope: flow when the peering configuration cannot guarantee flow tracking (currently only established via masquerade / port-forwarding), aligning behavior with the current dataplane capabilities described in #1625.

Changes:

• Add scope: flow validation during ACL rule validation, with accompanying unit tests in the config model.
• Update k8s ACL converter test helpers to plumb the CRD scope field through rule construction.
• Adjust acl-filter semantic tests to build an overlay that includes masquerade so flow-scoped ACLs pass new validation.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
config/src/external/overlay/acl.rs	Introduces scope: flow validation at config validation time and adds tests covering acceptance/rejection.
config/src/converters/k8s/config/acl.rs	Updates test rule-builder helper to accept scope and updates test cases accordingly.
acl-filter/src/tests.rs	Updates flow-scope tests to use a masquerade peering so the new config validation accepts scope: flow.

[coderabbitai]

🧹 Nitpick comments (1)

config/src/external/overlay/acl.rs (1)

1094-1106: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

Cover the port-forwarding acceptance path.

The positive test covers masquerade only; add an equivalent port-forwarding case to protect the other supported branch.

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@config/src/external/overlay/acl.rs` around lines 1094 - 1106, Extend
test_flow_scope_valid_with_flow_tracking to cover the port-forwarding branch in
addition to masquerade. Build the right-hand manifest with the existing
port-forwarding fixture or helper, create the equivalent rule and pattern, and
assert validation succeeds for that case.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In `@config/src/external/overlay/acl.rs`:
- Around line 1094-1106: Extend test_flow_scope_valid_with_flow_tracking to
cover the port-forwarding branch in addition to masquerade. Build the right-hand
manifest with the existing port-forwarding fixture or helper, create the
equivalent rule and pattern, and assert validation succeeds for that case.

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: ad2d1cec-6513-4fb9-ae07-ec4bff98b9a4

📥 Commits

Reviewing files that changed from the base of the PR and between 2e7d576 and d13384d.

📒 Files selected for processing (3)

• acl-filter/src/tests.rs
• config/src/converters/k8s/config/acl.rs
• config/src/external/overlay/acl.rs

🚧 Files skipped from review as they are similar to previous changes (2)

• acl-filter/src/tests.rs
• config/src/converters/k8s/config/acl.rs

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.