socket_由于目标机器积极拒绝_无法连接的解决办法

要在WEB上远程管理客户端软件。那我们就仿路由器那种模式用SOCKET来解决吧。

做了个DEMO，本机测试OK，拿到别的机器上做服务器，提示由于目标机器积极拒绝，无法连接。

查询各种资料，有的说是端口没开，有的说是服务没开。

各种雾水啊！仔细一想，问题可能出在本机在局域网IP上，而不是用127.0.0.1。

更正代码后，问题解决。下面演示服务器端代码的关键部分。

protected void Listen()

        {

 

MessageBox.Show("start listening");

stringip = "";

System.Net.IPHostEntryIpEntry = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName());

 

for (int i = 0; i != IpEntry.AddressList.Length; i++)

            {

if (!IpEntry.AddressList[i].IsIPv6LinkLocal)

                {

ip= IpEntry.AddressList[i].ToString();

                }

            }

IPEndPointipend = new IPEndPoint(IPAddress.Parse(ip), 8000);

            Socket sc = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

sc.Bind(ipend);

           Socket acc;

while (true)

{ sc.Listen(1);

acc= sc.Accept();

 

byte[] buff = new byte[1024];

intrecbyte = acc.Receive(buff, buff.Length, 0);

if (recbyte == 0)

break;

stringreciveval = "";

reciveval += Encoding.GetEncoding("gb2312").GetString(buff, 0, recbyte);

                    string returnval = "开始升级";

byte[] returnBy = Encoding.GetEncoding("gb2312").GetBytes(returnval);

acc.Send(returnBy, returnBy.Length, 0);

 

            }

acc.Close();

sc.Close();

        }

 

public string sendMessage()

    {

IPEndPointipend = new IPEndPoint(IPAddress.Parse("192.168.XXX.XXX"),8000);

        Socket sc = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);

sc.Connect(ipend);

        string message = "请升级软件";

byte[] bt = Encoding.GetEncoding("gb2312").GetBytes(message);

sc.Send(bt,bt.Length,0);

 

byte[] rebuff = new byte[1024];

intrecive = sc.Receive(rebuff, rebuff.Length, 0);

stringreturnval = "";

returnval += Encoding.GetEncoding("gb2312").GetString(rebuff, 0, recive);

sc.Close();

 

returnreturnval;

 

    }