v0.2.0

via v0.2.0 — IPv6 Support & Comprehensive Test Suite

Highlights

• IPv6 traceroute with single-family auto-select and -4/-6 force flags
• Cross-platform CI on Ubuntu, macOS, and Windows (Go 1.25.6)
• ~700 tests across unit, golden snapshot, teatest e2e, integration, mutation, and fuzz layers
• Per-package coverage floors enforced in CI
• Zero breaking changes from v0.1.0

New

• IPv6 traceroute — via now runs over IPv4 or IPv6. Auto-select prefers IPv6 when both target AAAA and local v6 transport are available.
  via google.com # auto (prefers v6 if available)
  via -4 google.com # force IPv4
  via -6 google.com # force IPv6

When -6 is requested but the target has no AAAA (or the host has no v6 transport), via exits with a clear error rather than silently falling back.

• IP family config — ip_family = "auto" | "4" | "6" in ~/.config/via/config.toml; also available in the Settings menu (Esc → Probe Settings → IP family).
• Dynamic v6 column width — the IP column widens automatically for v6 addresses in both the live TUI and report mode.
• v6 in every export format — JSON, CSV, and DOT all handle v6 addresses correctly (DOT node IDs sanitized to remain valid graphviz).
• v6 ASN enrichment — uses origin6.asn.cymru.com for AAAA hops.

Quality

• Cross-platform CI matrix on every push and PR
• Weekly fuzz workflow across every parser (ParseInnerHeader, TCPChecksum, parseTCPResponse, parseOriginResponse, parseASNameResponse, config.Load)
• 72% mutation kill rate baseline — the test suite catches deliberate code corruptions
• Opt-in make soak-test for real-network validation (never on CI)

Install

Homebrew

brew upgrade tonhe/tap/viaduct

From source

git clone https://github.com/tonhe/viaduct.git
cd viaduct
git checkout v0.2.0
make install

Linux users can avoid sudo by granting raw-socket capability once:
sudo setcap cap_net_raw+ep $(which via)

Changelog

• d09ad60 release: v0.2.0 — IPv6 support and cross-platform test suite