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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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docs/USAGE.md
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@@ -82,6 +82,7 @@ format = "text" # Log format: "text" (default) or "json"
| `!topic [text]` | Set or query channel topic (admin) |
| `!mode <mode> [args]` | Set channel mode (admin) |
| `!dns <target> [type]` | DNS lookup (A, AAAA, MX, NS, TXT, CNAME, PTR, SOA) |
| `!tdns <target> [type] [@server]` | TCP DNS lookup via SOCKS5 proxy |
| `!encode <fmt> <text>` | Encode text (b64, hex, url, rot13) |
| `!decode <fmt> <text>` | Decode text (b64, hex, url, rot13) |
| `!hash [algo] <text>` | Generate hash digests (md5, sha1, sha256, sha512) |