On hosts where IPv6 is configured but not routed (common on cloud VMs),
Telegram media downloads fail because the pinned DNS lookup may return
IPv6 addresses first. Even though autoSelectFamily (Happy Eyeballs) is
enabled, the round-robin pinned lookup serves individual IPv6 addresses
that fail before IPv4 is attempted.
Sort resolved addresses so IPv4 comes first, ensuring both Happy Eyeballs
and single-address round-robin try the working address family first.
Fixes#23975
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add optional urlAllowlist config at tools.web level that restricts which
URLs can be accessed by web tools:
- Config types (types.tools.ts): Add urlAllowlist?: string[] to tools.web
- Zod schema: Add urlAllowlist field to ToolsWebSchema
- Schema help: Add help text for the new config fields
- web_search: Filter Brave search results by allowlist (provider=brave)
- web_fetch: Block URLs not matching allowlist before fetching
- ssrf.ts: Export normalizeHostnameAllowlist and matchesHostnameAllowlist
URL matching supports:
- Exact domain match (example.com)
- Wildcard patterns (*.github.com)
When urlAllowlist is not configured, all URLs are allowed (backwards compatible).
Tests: Add web-tools.url-allowlist.test.ts with 23 tests covering:
- URL allowlist resolution from config
- Wildcard pattern matching
- web_fetch error response format
- Brave search result filtering
