没有从 bittorrent 对等握手中收到任何数据

问题描述

我在 bit Torrent 协议上遇到了一些问题.我正在向一些对等方发送握手消息.我的客户端基本上连接到列表中的每个对等点，然后发送握手".代码如下 -

I'm having some trouble on the bit torrent protocol. I'm at the point of sending a handshake message to some peers. I have my client basically connect to every peer in list then send the 'handshake'. Code is below -

peer_id = 'autobahn012345678bit'
peer_id = peer_id.encode('utf-8')
pstr = 'BitTorrent protocol'
pstr = pstr.encode('utf-8')
pstrlen = chr(19)
pstrlen = pstrlen.encode('utf-8')
reserved = chr(0) * 8
reserved = reserved.encode('utf-8')

有我要发送的变量.我的消息是 -

There are my variables that I'm sending. My msg is -

msg = (pstrlen + pstr + reserved + new.torrent_hash() + peer_id)

根据比特洪流规范，我的消息是 49 + len(pstr) 的适当长度 -

Based on the bit torrent specification my message is the appropriate len of 49 + len(pstr) -

lenmsg = (pstrlen + reserved + new.torrent_hash() + peer_id)

print(lenmsg)
print(len(lenmsg))

输出 -

b'\x13\x00\x00\x00\x00\x00\x00\x00\x00\x94z\xb0\x12\xbd\x1b\xf1\x1fO\x1d)\xf8\xfa\x1e\xabs\xa8_\xe7\x93autobahn012345678bit'
49

整个消息看起来像这样 -

the entire message looks like this -

b'\x13\x00\x00\x00\x00\x00\x00\x00\x00\x94z\xb0\x12\xbd\x1b\xf1\x1fO\x1d)\xf8\xfa\x1e\xabs\xa8_\xe7\x93autobahn012345678bit'

我的主要问题是我没有收到任何数据.我有 socket.settimeout(4) 并且它会超时?

My main problem being I don't receive any data back. I have the socket.settimeout(4) and it'll just timeout?

推荐答案

输出不正确，缺少BitTorrent 协议".
正确的握手字符串长度为 68 个字节.

The output is incorrect, it misses 'BitTorrent protocol'.
A proper handshake string is 68 bytes long.

应该是:

\x13BitTorrent protocol\x00\x00\x00\x00\x00\x00\x00\x00\x94z\xb0\x12\xbd\x1b\xf1\x1fO\x1d)\xf8\xfa\x1e\xabs\xa8_\xe7\x93autobahn012345678bit

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