2178d6a70c
A maintainable, extensible BitTorrent client (C11, Linux/io_uring) targeting 10 GbE saturation. All torrent functionality is built from scratch; liburing is the only linked third-party dependency on the data path. Implements Phases 1-7 of the roadmap: - core: page-aligned buffer pool, MPMC/Treiber queues, bitfields, worker pool - crypto: SHA-1/256 (SHA-NI + scalar), Merkle (BEP-52), RC4 (MSE) - bencode/metainfo: zero-copy parser, v1/v2/hybrid .torrent + magnet - peer: sans-IO wire codec, MSE/PE handshake state machine, BEP-10, ut_metadata, PEX - piece/storage: block-level multi-peer engine, rarest-first + endgame, per-file completion events + single-file relocate (move-as-you-finish) - tracker/dht: HTTP + UDP (BEP-15) trackers, BEP-5 KRPC iterative lookup - platform: io_uring reactor (SQPOLL, registered buffers, SEND_ZC) - surface: versioned RPC, native plugin ABI, sandboxed Lua scripting, nautd/nautctl Verified against libtorrent (single/multi/hybrid, MSE, magnet-via-DHT, swarm); unit + interop tests green; ASan/UBSan/TSan clean. Scripting reference in docs/scripting.md. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
27 lines
976 B
Python
27 lines
976 B
Python
#!/usr/bin/env python3
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"""Minimal BEP-15 UDP tracker for the Phase 4 integration test."""
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import socket
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import struct
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import sys
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peer_port = int(sys.argv[1])
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connection_id = 0x0102030405060708
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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sock.bind(("127.0.0.1", 0))
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print("PORT %d" % sock.getsockname()[1], flush=True)
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while True:
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packet, addr = sock.recvfrom(2048)
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if len(packet) >= 16 and packet[8:12] == b"\x00\x00\x00\x00":
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sock.sendto(struct.pack("!IIQ", 0, struct.unpack("!I", packet[12:16])[0],
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connection_id), addr)
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continue
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if len(packet) >= 98 and packet[8:12] == b"\x00\x00\x00\x01":
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txid = struct.unpack("!I", packet[12:16])[0]
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response = (
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struct.pack("!IIIII", 1, txid, 1800, 0, 1)
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+ socket.inet_aton("127.0.0.1")
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+ struct.pack("!H", peer_port)
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)
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sock.sendto(response, addr)
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print("REQUEST announce", flush=True)
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