Question

在实施Bittorrent协议时，与对等方进行通信并遇到一些传入的对等方消息时遇到问题：这些消息的缓冲区包含大约200个“ 255”值，然后包含大约200个随机数。问题是我在这种有效负载的规范定义中找不到。缓冲区中第一个或第四个字节描述的消息类型，在我的情况下，它们都等于255，并且没有这种消息类型（可用类型为1-8、16、21-23）

缓冲区的数组表示形式：

[255,255,255,255,255,239,254,255,255,255,255,255,255,255,255,247,255,255,255,255,255,255,255,255,255,255,223,255,255,255,255,255,255,255,255,255,255,255,255,255,254,255,255,255,239,255,254,237,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,239,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,251,255,255,255,255,255,255,255,255,255,255,255,255,253,191,255,255,255,255,255,255,253,255,255,255,255,255,255,255,255,255,255,255,249,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,247,255,255,255,255,255,255,255,254,191,255,127,255,247,255,255,255,255,255,255,255,255,255,255,255,255,255,0,0,0,5,4,0,0,3,11,0,0,0,5,4,0,0,5,196,0,0,0,5,4,0,0,1,186,0,0,0,5,4,0,0,2,102,0,0,0,5,4,0,0,2,95,0,0,0,5,4,0,0,6,7,0,0,0,5,4,0,0,4,30,0,0,0,5,4,0,0,4,190,0,0,0,5,4,0,0,4,189,0,0,0,5,4,0,0,2,47,0,0,0,5,4,0,0,1,19,0,0,0,5,4,0,0,0,28,0,0,0,5,4,0,0,0,223,0,0,0,5,4,0,0,2,75,0,0,0,5,4,0,0,4,33,0,0,0,5,4,0,0,1,31,0,0,0,5,4,0,0,1,100,0,0,0,5,4,0,0,6,24,0,0,0,5,4,0,0,3,181,0,0,0,5,4,0,0,4,94,0,0,0,5,4,0,0,2,99,0,0,0,5,4,0,0,6,44,0,0,0,5,4,0,0,0,74,0,0,0,5,4,0,0,6,9,0,0,0,1,1]

Answer 1

您所拥有的是一条位域消息，其中缺少长度，类型和可能的一些数据的开头，24条 have 消息和一条取消锁定 strong>消息。

255,255,255,255,255,239,254,255,255,255,255,255,255,255,255,247,255,255,255,255,255,255,255,255,255,255,223,255,255,255,255,255,255,255,255,255,255,255,255,255,254,255,255,255,239,255,254,237,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,239,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,251,255,255,255,255,255,255,255,255,255,255,255,255,253,191,255,255,255,255,255,255,253,255,255,255,255,255,255,255,255,255,255,255,249,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,247,255,255,255,255,255,255,255,254,191,255,127,255,247,255,255,255,255,255,255,255,255,255,255,255,255,255,
0,0,0,5,4,0,0,3,11,
0,0,0,5,4,0,0,5,196,
0,0,0,5,4,0,0,1,186,
0,0,0,5,4,0,0,2,102,
0,0,0,5,4,0,0,2,95,
0,0,0,5,4,0,0,6,7,
0,0,0,5,4,0,0,4,30,
0,0,0,5,4,0,0,4,190,
0,0,0,5,4,0,0,4,189,
0,0,0,5,4,0,0,2,47,
0,0,0,5,4,0,0,1,19,
0,0,0,5,4,0,0,0,28,
0,0,0,5,4,0,0,0,223,
0,0,0,5,4,0,0,2,75,
0,0,0,5,4,0,0,4,33,
0,0,0,5,4,0,0,1,31,
0,0,0,5,4,0,0,1,100,
0,0,0,5,4,0,0,6,24,
0,0,0,5,4,0,0,3,181,
0,0,0,5,4,0,0,4,94,
0,0,0,5,4,0,0,2,99,
0,0,0,5,4,0,0,6,44,
0,0,0,5,4,0,0,0,74,
0,0,0,5,4,0,0,6,9,
0,0,0,1,1

BitTorrent的“点对点”连接由两个单向字节流组成，每个方向上一个。从接收缓冲区读取数据流时，不要期望每次都能得到一条完整的消息。您必须自己将流拆分为消息。另外，请做好准备，使响应对等方很可能在握手结束后立即开始发送消息。

Node js peerwire协议实现

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