Question

我的应用程序需要在socks4a代理上使用Tor。目前我的来自tor的回复被报告为成功，但根据维基百科文章SOCKS，没有报告的袜子4a变体所需的Port或Ip：

字段1：空字节
  字段2：状态，1字节：

0x5a =授予的请求
  0x5b =请求被拒绝或失败
  0x5c =请求失败
  0x5d =请求失败

字段3：网络字节顺序端口号，2字节
  字段4：网络字节顺序IP地址，4字节

Tor没有填写第3和第4栏，为什么要这样做以及如何解决？

袜子握手的结果：

Request: 0x04, 0x01, 0x00, 0x50, 0x00, 0x00, 0x00, 0x08, 0x00, 0x77,    
0x77, 0x77, 0x2E, 0x67, 0x6F, 0x6F, 0x67, 0x6C, 0x65, 0x2E, 0x63, 0x6F, 0x6D, 0x00

Response from Tor: 0x00, 0x5A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00

源代码：

retval = connect(in_Socket, in_Socks, socksLen);    //Connecting to Socks Server

    if (retval != 0)
       return retval;                       //Error if !=0

    if (szUserId)
       lPacketLen += strlen(szUserId);   //If there is a userid, add its length to the packet length

    lPacketLen += strlen(szHostName);   //www.google.com
    lPacketLen += 1;
    char *packet = new char[lPacketLen];//Allocate a packet
    memset(packet, 0x00, lPacketLen);   //Init to zero
    packet[0] = SOCKS_VER4;             //Socks version: 0x4
    packet[1] = 0x01;                   //Connect code

    memcpy(packet + 2,(char *)&(((sockaddr_in *)in_szName)->sin_port),2);   //Copy the port, 80 in this case

    //Send a Malformed IP, as per Socks4a states
    packet[4] = 0x00;
    packet[5] = 0x00;
    packet[6] = 0x00;
    packet[7] = 0x8;

    int IDLen = strlen(szUserId);
    if (szUserId)                              //If there was a userid, copy it now
        memcpy(packet + 8, szUserId, ++IDLen); //Account for null terminator /0
    else
        packet[8] = 0; //Send null ID if none provided

    //Write the hostname we want Tor to resolve, i used www.google.com
    memcpy(packet + 8 + IDLen, szHostName, strlen(szHostName) + 1);

    if (m_Interval == 0)
        Sleep(SOCKS_INTERVAL);
    else
        Sleep(m_Interval);

    printf("\nRequest: ");
    PrintArray(packet, lPacketLen);


    send(in_Socket, packet, lPacketLen, 0); //Send the packet
    delete[] packet;        //Unallocate the packet

    char reply[8];          //Allocate memory for the reply packet
    memset(reply, 0, 8);    //Init To 0

    long bytesRecv = 0;
    bytesRecv = recv(in_Socket, reply, 8, 0);   //Get the reply packet

    printf("\nResponse from Tor: ");
    PrintArray(reply, 8);

    //Check Reply Codes later

Answer 1

Tor似乎将此视为可选字段，它似乎记住连接地址，解析它，然后在握手后将任何数据转发到已解析的域。

Tor Socks4a响应不完整

1 个答案: