v0.11.3 — Resilient Public IP Discovery

Resilient Public IP Discovery

Multi-Server STUN Fallback

• Public IP discovery now tries multiple STUN servers in sequence for resilience
• Server list: Google (primary + backup) and Cloudflare on different ports
• Improves success rate in restrictive network environments

DNS-Based Fallback via Akamai whoami

• NEW: If all STUN servers fail, falls back to DNS TXT query to whoami.ds.akahelp.net
• DNS queries work in captive portal environments where STUN/UDP may be blocked
• Parses the ip field from Akamai's response to extract public IPv4

Unified getPublicIPv4() Function

• Tiered discovery: STUN (fast, ~10-50ms) → DNS (reliable, ~50-100ms)
• Both Segmentation.swift and Traceroute.swift now use the unified approach
• New error type PublicIPError provides details when all methods fail

Why This Matters

• Hotel/corporate networks often block non-standard UDP ports (STUN)
• Captive portals must allow DNS for the portal itself to function
• This change significantly improves public IP detection in edge cases

Full Changelog: v0.11.2...v0.11.3

What's Changed

• feat(probe): modernize TCP/UDP probes with DispatchSource I/O (v0.11.2) by @dweekly in #11
• feat(stun): resilient public IP discovery with DNS fallback (v0.11.3) by @dweekly in #12

Full Changelog: v0.11.1...v0.11.3