Question

我正在使用python创建一个Bittorrent客户端，并为流媒体文件进行扭曲，并且我已成功完成此操作。

我正在使用Twisted Framework连接到跟踪器和对等方。我可以从跟踪器中检索对等列表，并通过为每个对等体执行reactor.connectTCP()函数来连接它们。

但我的客户端无法侦听TCP连接。意味着没有来自对等方的传入连接。我在给定端口使用reactor.listenTCP()。我在请求数据包中使用的相同端口，我发送给跟踪器的通知请求。我发送给跟踪器的请求数据包生成如下：

def udp_create_announce_request(connection_id, payload, s_port):
    action = 0x1 #action (1 = announce)
    transaction_id = udp_get_transaction_id()
    buf = struct.pack("!q", connection_id)                                  #first 8 bytes is connection id
    buf += struct.pack("!i", action)                                        #next 4 bytes is action 
    buf += struct.pack("!i", transaction_id)                                #followed by 4 byte transaction id
    buf += struct.pack("!20s", urllib.unquote(payload['info_hash']))        #the info hash of the torrent we announce ourselves in
    buf += struct.pack("!20s", urllib.unquote(payload['peer_id']))          #the peer_id we announce
    buf += struct.pack("!q", int(urllib.unquote(payload['downloaded'])))    #number of bytes downloaded
    buf += struct.pack("!q", int(urllib.unquote(payload['left'])))          #number of bytes left
    buf += struct.pack("!q", int(urllib.unquote(payload['uploaded'])))      #number of bytes uploaded
    buf += struct.pack("!i", 0x2)                                           #event 2 denotes start of downloading
    buf += struct.pack("!i", 0x0)                                           #IP address set to 0. Response received to the sender of this packet. IP decided by tracker. 
    key = udp_get_transaction_id()                                          #Unique key randomized by client
    buf += struct.pack("!i", key)
    buf += struct.pack("!i", -1)                                            #Number of peers required. Set to -1 for default
    buf += struct.pack("!i", int(urllib.unquote(payload['port'])))          #port on which response will be sent
return (buf, transaction_id)

创建数据包时是否有错误？或者没有同行试图连接到我的cliet的端口有不同的原因？ Twisted中的Factory和Protocol实现是否存在问题？

修改

反应堆调用的顺序如下：

factory = protocol.ServerFactory()
factory.protocol = Echo
self.reactor.listenTCP(self.port, factory)    
for peer in peers:
    self.reactor.connectTCP(peer.ip, peer.port, peerProtocol, timeout=10) # Working Properly
reactor.run()

Echo协议定义为：

class Echo(protocol.Protocol):
    """This is just about the simplest possible protocol""" 
    def dataReceived(self, data):
        "As soon as any data is received, write it back."
        print "Hello", data 
        # Never Printed

另外$ netstat -na | grep '{PORT}'其中PORT是侦听端口，显示正确的端口设置以侦听

没有Bittorrent客户端的传入对等连接

修改

0 个答案: