Fix ONVIF auto-discovery and improve service compatibility

[Copilot]

ONVIF camera auto-discovery was broken — devices were invisible to NVRs and ONVIF clients. Multiple root causes plus missing service handlers that caused clients to reject the device post-discovery.

Discovery fixes (onvif_discovery.sh)

• Multicast reception: Added allmulti flag, ip maddr add group join, and WiFi power-save disable — without these, busybox nc never receives Probe packets on most embedded WiFi interfaces
• Reliable Hello: Separated periodic Hello sender (30s) into independent background process — previously coupled to the nc listen loop, so if nc -w blocked (common busybox bug), Hello stopped entirely
• timeout fallback: Wraps nc with timeout command when available, since busybox nc -w is unreliable across versions
• Process cleanup: Stop handler now kills grandchild processes (nc spawned by Hello subshell)

setup_multicast() {
  ifconfig "$IFACE" multicast 2>/dev/null
  ifconfig "$IFACE" allmulti 2>/dev/null        # bypass kernel multicast filter
  ip maddr add 239.255.255.250 dev "$IFACE"    # IGMP group join
  iw dev "$IFACE" set power_save off 2>/dev/null # prevent WiFi dropping multicast
}

Auth fix (lighttpd.conf)

• Exempted /onvif/* and /cgi-bin/onvif_* paths from HTTP digest auth — ONVIF uses WS-Security, not HTTP auth

Device service — 6 new handlers

• GetServiceCapabilities, GetDiscoveryMode, GetHostname, GetDNS, GetNetworkProtocols, GetNetworkDefaultGateway
• Standard XAddrs paths (/onvif/device_service instead of CGI paths)

Media service — 8 new handlers

• GetServiceCapabilities, GetVideoEncoderConfigurationOptions, GetVideoSourceConfigurationOptions, GetCompatibleVideoEncoderConfigurations
• GetVideoSourceConfiguration, GetVideoEncoderConfiguration (singular, by token)
• GetAudioSourceConfigurations, GetAudioEncoderConfigurations
• Sub-stream profile support throughout

---

📍 Connect Copilot coding agent with Jira, Azure Boards or Linear to delegate work to Copilot in one click without leaving your project management tool.