On a multi-homed host the discovery layer used to walk net.Interfaces()
and pick the first non-loopback IPv4 NIC, while UPnP/SSDP bound a
wildcard UDP socket and let the kernel route the multicast send. That
meant --bind on soundtouch-web only moved the HTTP listener; the
discovery still went out whatever interface the kernel preferred (often
the wrong one on hosts where the speakers sit behind a secondary NIC).
Introduce a separate DiscoveryInterface knob:
* pkg/config: DiscoveryInterface field + DISCOVERY_INTERFACE env var.
* pkg/discovery/mdns: NewMDNSDiscoveryServiceWithInterface; the
interface resolver now honours an explicit name and validates it
has a usable IPv4 address before handing it to hashicorp/mdns.
* pkg/discovery/upnp: when an interface is configured, bind the UDP
socket's source IP to the NIC's IPv4 and call
ipv4.PacketConn.SetMulticastInterface so M-SEARCH leaves the right
NIC. Without an interface, behaviour is unchanged.
* cmd/soundtouch-web: new --interface flag (DISCOVERY_INTERFACE env)
plumbed into the config before the discovery service is built.
go.mod/go.sum reflect promoting golang.org/x/net from indirect to a
direct dependency (now imported for ipv4.PacketConn).
Refs #264.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Replace serial number-based directory structure with deviceId from device /info
- Extract migration logic to handle transition from old to new directory structure
- Fix directory resolution bug that prevented proper migration to deviceId-based paths
- Ensure all device data (Presets.xml, Sources.xml, Recents.xml) preserved during transition
- Add configurable migration with --migration-enabled and --migration-dry-run flags
- Update DeviceInfo.xml to reflect authoritative deviceId from device's /info endpoint
- Directory structure now: /devices/{deviceId}/ instead of /devices/{serialNumber}/
This aligns the directory structure with the device's self-declared identity
and ensures data consistency with the device's /info endpoint.
Major improvements to device discovery system:
🔧 **SSDP Discovery Fixed**:
- Fixed networking issue where SSDP used connected UDP socket instead of UDP listener
- SSDP now properly receives unicast responses from multicast requests
- UPnP discovery now works reliably and finds all MediaRenderer devices
✨ **Enhanced DiscoveredDevice Model**:
- Added consistent URL fields (APIBaseURL, InfoURL) for all discovery methods
- Added protocol-specific fields (UPnPLocation, UPnPUSN, MDNSHostname, etc.)
- Added DiscoveryMethod tracking to show how devices were found
- Added device merging support for same device found via multiple protocols
🚀 **Unified Discovery Improvements**:
- Fixed device merging logic to properly combine protocol-specific data
- Discovery methods now correctly show combinations like 'Configuration+SSDP/UPnP+mDNS/Bonjour'
- Removed duplicate configuration device loading in individual services
- All three discovery methods (SSDP, mDNS, Configuration) work together seamlessly
🛠 **Updated Tools & Examples**:
- Updated soundtouch-cli to display new consistent field structure
- Enhanced all example programs with better device information display
- Added new unified discovery example demonstrating all three methods
- Fixed context timeout issues in example programs
📋 **Comprehensive Testing**:
- All tests updated and passing
- Real-world validation with actual Bose SoundTouch devices
- Confirmed discovery methods properly merge device data
Every discovered device now has consistent http://host:port/info URLs regardless
of discovery method, while preserving valuable protocol-specific metadata.
- Reference original API documentation source from Bose Corporation
- Link to official Bose SoundTouch End-of-Life page
- Clarify this is an independent implementation
- Add disclaimer about non-affiliation with Bose Corporation
- Provide both online and local documentation references
- Fix bodyclose issues by properly closing WebSocket response body
- Fix errcheck issues by checking errors on resp.Body.Close(), conn.Close(), etc.
- Fix errorlint issue by using errors.As() instead of type assertion
- Fix nilerr issue by adding proper logging for UPnP discovery failures
- Fix gocritic issues:
- Convert if-else chains to switch statements
- Fix parameter type combining (paramTypeCombine)
- Fix range value copying (rangeValCopy)
- Fix exitAfterDefer by calling cancel() before log.Fatalf()
- Add package comments to fix revive package-comments issues
- Rename ClientConfig to Config to avoid type name stuttering
- Add missing exported constant comments
- Fix unused parameter issues by renaming to _
- Fix empty block issues
- Add t.Helper() to test helper functions
- Update User-Agent and fix GetNetworkSummary behavior to match test expectations
Reduces linting issues from 151 to 108 (28% improvement).
All tests now pass.
Features Added:
• mDNS/Bonjour discovery using hashicorp/mdns library
• Unified discovery service combining UPnP + mDNS + configuration
• Parallel discovery execution for optimal performance
• Comprehensive logging for both UPnP and mDNS discovery
• Network diagnostic tools for troubleshooting
New Discovery Methods:
• Configuration-based (fastest, most reliable)
• UPnP/SSDP discovery (widely supported, enhanced logging)
• mDNS/Bonjour discovery (Apple ecosystem friendly)
New Programs & Tools:
• cmd/example-mdns - Standalone mDNS discovery testing
• cmd/example-upnp - Isolated UPnP/SSDP discovery testing
• cmd/mdns-scanner - Network diagnostic tool for mDNS services
Enhanced Build System:
• make dev-mdns / dev-mdns-verbose (mDNS testing)
• make dev-upnp / dev-upnp-verbose (UPnP testing)
• make dev-scan-all (scan all network services)
• make dev-scan-soundtouch (scan for SoundTouch services)
Documentation:
• docs/DISCOVERY.md - Comprehensive discovery guide
• Updated README.md with new features and commands
• Full API documentation and troubleshooting guide
Technical Improvements:
• Detailed request/response logging for UPnP M-SEARCH
• Step-by-step mDNS service discovery tracking
• IP address resolution with IPv4/IPv6 handling
• Service name parsing and device info extraction
• Robust error handling and network diagnostics
Backward Compatibility:
• No breaking changes to existing APIs
• All existing tests pass
• CLI interface unchanged but enhanced
• Legacy UPnP-only service still available
- Implement HTTP client with XML support for SoundTouch Web API
- Add UPnP device discovery with SSDP protocol
- Create type-safe Go models for API responses
- Build CLI tool with device discovery and info commands
- Add comprehensive configuration management via .env and env vars
- Include extensive documentation (API endpoints, patterns, development guide)
- Translate all German documentation to English
- Set up modern Go project structure with testing framework
- Add Makefile for cross-platform builds and development workflow
Features:
✅ Device discovery (UPnP + manual configuration)
✅ Device information retrieval
✅ XML request/response handling
✅ CLI interface with flexible device targeting
✅ Cross-platform compatibility
✅ Comprehensive test coverage with mock data
✅ Production-ready configuration management
Tobias GesellchenandClaude Opus 4.7