Add Vodafone Station (ARRIS TG3442DE) cable modem provider

[njoerd114]

Summary

• New VodafoneStationProvider for the ARRIS TG3442DE ("Vodafone Station", Vodafone DE) cable gateway (provider key: vodafone-station)
• Ports the TG path of the MIT-licensed DOCSight driver (itsDNNS/docsight, app/drivers/vodafone_station.py), which is battle-tested against firmware 01.05.063.13.EURO.PC20 (DOCSight issue Fix L2 path analysis for daisy-chain switch topologies #40); my device runs 01.05.063.15.EURO.PC20
• Authenticates via AES-CCM encrypted login: PBKDF2-HMAC-SHA256 (1000 iterations, 16-byte key) derived from the login page's mySalt/myIv JS vars, POST to /php/ajaxSet_Password.php, CSRF nonce decrypted from the response (AAD "nonce")
• Polls DOCSIS data from /php/status_docsis_data.php (HTML-embedded json_dsData / json_usData JS arrays)
• Handles TG quirks: power format "-1.2 dBmV/1158.8 dBuV", OFDM/OFDMA frequency ranges ("start~end" Hz, band center), SNR as "41.8 dB", credential cookie extracted from base_95x.js
• Stale-session recovery: on HTTP 400/401/403, invalidates the session, re-authenticates, and retries once (the modem allows a single active admin session)
• Session state is per-configured-CM, so multiple TG3442DEs can be monitored without cross-talk
• Plugs into the existing ICableModemProvider strategy — no changes needed to the poll loop, InfluxDB writer, alert evaluator, or UI

Test plan

• Add a Vodafone Station (TG3442DE) in Settings with the new provider
• Test Connection button succeeds and reports channel counts
• Polling populates DS/US channel charts (power, SNR, FEC) in the CM panel
• Incorrect credentials produce a clear error (login Fail/Lockout), not a crash
• Provider dropdown shows the correct label

Environment: personal homelab deployment. Happy to provide UniFi device model / controller version if useful.

[tvancott42]

Checking this out now. Not sure if it'll make the v2.6.0 multi-WAN-monitoring release, but it'll follow soon after. Do you have a HAR capture of the flow? This should be possible if you either have a reference for any gotchas during the flow, or a HAR trace.