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feat: add TCP DNS plugin with SOCKS5 proxy support

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Extract shared DNS wire-format helpers into src/derp/dns.py so both
the UDP plugin (dns.py) and the new TCP plugin (tdns.py) share the
same encode/decode/build/parse logic.

The !tdns command routes queries through the SOCKS5 proxy via
derp.http.open_connection, using TCP framing (2-byte length prefix).
Default server: 1.1.1.1.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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user
2026-02-15 16:09:35 +01:00
parent 1bdba0ea06
commit 26063a0e8f
8 changed files with 542 additions and 153 deletions
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4
docs/CHEATSHEET.md
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@@ -152,9 +152,11 @@ files, login.
!username list # List services by category
!username john # Full scan (~25 services)
!username john github # Check single service
!dns example.com # A record lookup
!dns example.com # A record lookup (UDP, local resolver)
!dns 1.2.3.4 # Reverse PTR lookup
!dns example.com MX # Specific type (A/AAAA/MX/NS/TXT/CNAME/PTR/SOA)
!tdns example.com # A record lookup (TCP via SOCKS5 proxy)
!tdns example.com MX @8.8.8.8 # Explicit type + custom server
!cert example.com # CT log lookup (max 5 domains)
!whois example.com # WHOIS domain lookup
!whois 8.8.8.8 # WHOIS IP lookup