vrp-ir 0.6.0

Source-traceable structured IR for Huawei VRP configurations (parse-time SourceRef).

vrp-ir

Source-traceable structured IR for Huawei VRP configurations.

vrp-ir parses an offline Huawei VRP configuration file (display current-configuration output / saved .cfg) into a structured, typed model where every parsed value carries a SourceRef back to the exact file + line it came from.

Huawei VRP .cfg  ──►  structured IR  ──►  every field knows its source line

Status: v0.6 / alpha. Routing/switching (VLAN, VRF RD/RT, interfaces, ACL, static routes) and USG firewall (firewall zone, security-policy, nat-policy, nat server, ip address-set / ip service-set objects, hrp, and the management plane — user-interface con/vty, ssh server cipher, aaa local-users, telnet/http switches) parsed with full source provenance, plus a security acceptance audit (vrp-ir audit, 13 checks) whose findings cite the exact config line. Roadmap below.

💼 Commercial — vrp-ir is the open core of AegisTwin, a Huawei security-integration acceptance workbench. Need customer-grade acceptance reports, a readiness review, or multi-vendor coverage? See Commercial / support.

Why this exists (the gap)

The network-automation ecosystem is rich, but a specific combination is missing:

• Batfish is excellent, but its source explicitly marks Huawei VRP as UNSUPPORTED.
• ntc-templates has ~35 Huawei display show-command templates, but no display current-configuration (config-file) parser.
• ciscoconfparse2 is Cisco-centric and only exposes an integer .linenum per line — not field-level provenance.
• No open-source tool exposes field → file:line provenance for parsed config facts.

vrp-ir fills exactly that gap: Huawei VRP config file → semantic model with per-field source traceability. This is what acceptance/audit work needs — when a value looks wrong, jump straight to the line, don't grep the raw config.

Install

pip install vrp-ir            # once published to PyPI
# or, from source:
pip install -e .

Quick start (CLI)

vrp-ir parse examples/sample-vrp.cfg     # routing / switching
vrp-ir parse examples/sample-usg.cfg     # USG firewall (zones / policy / nat-policy / objects / hrp)

{
  "hostname": { "value": "CORE-FW-01", "source": { "file": "...", "line": 2, "col": 8 } },
  "interfaces": [
    {
      "name": { "value": "GigabitEthernet0/0/1", "source": { "line": 9 } },
      "ipv4": [
        { "address": { "value": "10.10.10.1", "source": { "line": 11 } },
          "prefix_length": { "value": 24, "source": { "line": 11 } } }
      ]
    }
  ]
}

Quick start (Python)

from vrp_ir import parse_file

cfg = parse_file("examples/sample-vrp.cfg")
print(cfg.hostname.value)                       # CORE-FW-01
ip = cfg.interfaces[0].ipv4[0]
print(ip.address.value, ip.prefix_length.value) # 10.10.10.1 24
print(ip.address.source)                        # examples/sample-vrp.cfg:11  ← provenance

Security acceptance audit (v0.6)

Turn the source-traceable IR into a security acceptance report: each check is a small test case (intent), and every finding cites the exact config line it is based on — so a reviewer jumps straight to the offending line.

vrp-ir audit examples/sample-usg-risky.cfg            # Markdown acceptance report
vrp-ir audit examples/sample-usg.cfg --format json    # machine-readable JSON
vrp-ir audit examples/sample-usg-risky.cfg --strict   # exit 1 if any check fails (CI gate)

### ❌ `FW-DEFAULT-DENY` [CRITICAL] — Security-policy default action denies unmatched traffic
Default action is 'permit': all traffic matching no rule is allowed (permit-any).
**Evidence**:
- `examples/sample-usg-risky.cfg:14` — `default action permit`

Checks (13): policy default-deny (permit-any); permit-scope (rules not narrowed by zone/address, dereferencing address-set references so an object that resolves to 0.0.0.0/0 is still flagged); permit rules without session logging; one-interface-per-zone; address-set equal to any; HRP enabled; HRP enabled but heartbeat interface/peer incomplete; management plane — Telnet/HTTP enabled (cleartext), VTY accepting Telnet, VTY without an inbound source ACL, weak SSH ciphers (CBC/3DES/DES), and local AAA users granted the Telnet service. See a full rendered report at docs/acceptance-report-example.md.

Design principles

• Zero runtime dependencies in the core — easy to embed.
• Reuse, don't reinvent. vrp-ir is a thin VRP-config + provenance layer. It complements (does not replace) ntc-templates (show-command parsing), hier_config (VRP diff/remediation), napalm (live-device collection) and Batfish (multi-vendor analysis). Topology/analysis layers will integrate these rather than rebuild them.
• Provenance first. If we can't say where a value came from, we don't surface it.

Roadmap

• v0.1: hostname + interface basics with SourceRef. ✅
• v0.2: VLANs (batch ranges), VRF (RD/RT), interface enhancements (link-type, trunk allow-pass ranges, Eth-Trunk, dot1q subinterfaces, secondary IPv4, VRF binding), ACLs, static routes. ✅
• v0.3: Huawei USG firewall objects — firewall zone, security-policy (rule name with zones / addresses / services / profiles / action / logging), nat server, hrp (the global OSS gap; Batfish drops VRP entirely). ✅
• v0.4: security acceptance audit — test-case schema (testCase ↔ intent ↔ evidenceRef) + a Markdown/JSON report generator; vrp-ir audit with seed firewall checks, each citing its source line. ✅
• v0.5: nat-policy blocks, ip address-set / ip service-set objects, telnet/http management switches; audit at 9 checks — address-set dereference in permit-scope, address-set-equals-any, HRP consistency, cleartext management (Telnet / HTTP). ✅
• v0.6 (now): management-plane access baseline (driven by real-world config corpus) — user-interface con/vty (protocol inbound / inbound ACL / auth mode), ssh server cipher, aaa local-users; audit grows to 13 checks (VTY-accepts-Telnet, VTY-no-ACL, weak-SSH-cipher, AAA-user-Telnet). ✅
• v0.6.x (next): SNMP community, NTP / Syslog presence, NAT correctness, vsys; widen the test corpus.
• Later: Huawei security-device coverage (USG / WAF / AntiDDoS / 4A).

Commercial / support

vrp-ir is free and open source (Apache-2.0). It is the open foundation of AegisTwin — a carrier/data-center security-integration acceptance workbench (HLD/LLD → traceable topology → acceptance advisor → evidence chain → sign-off report). If you need:

• Huawei security-device acceptance (USG/WAF/AntiDDoS/4A),
• HLD/LLD → traceable acceptance test cases,
• customer-grade, auditable acceptance reports (incl. MLPS / carrier formats),

→ open an issue tagged commercial, or reach out about a paid workflow review / design-partner pilot.

Contributing

See CONTRIBUTING.md. Real (de-identified) VRP config snippets that we parse incorrectly make the best issues.

License

Apache-2.0.