tcp服務端為C++代碼，在Windows下實現，代碼如下：

// a TCP Server

#define WIN32_LEAN_AND_MEAN

#define _WINSOCK_DEPRECATED_NO_WARNINGS

#include

#include

#include

// add a static library

#pragma comment(lib,"ws2_32.lib")

int main()

{

WORD ver = MAKEWORD(2,2);

WSADATA dat;

WSAStartup(ver,&dat);

//----------------------------

// 1. build a socket

SOCKET sock = socket(AF_INET,SOCK_STREAM,0);//IPPROTO_TCP

// 2. bind a port

sockaddr_in addr = {};// address

addr.sin_family = AF_INET;

u_short port = 4567;

addr.sin_port = htons(port); // host to net short

addr.sin_addr.S_un.S_addr = INADDR_ANY;//inet_addr("127.0.0.1");

int bind_ret = bind(sock,(sockaddr*)&addr,sizeof(sockaddr_in));

if(bind_ret == SOCKET_ERROR) // check whether binding is ok.

{

//printf("Failed to bind the socket");

std::cout << " - Failed to bind the socket @" << port << std::endl;

}

// 3. listen

int listen_ret = listen(sock,5);

if(listen_ret == SOCKET_ERROR)

{

std::cout << " - Listening error" << std::endl;

}

else

{

std::cout << " - Listening & Waiting for a connection..." << std::endl;

}

// 4. accept

sockaddr_in clientAddr = {};

int nAddrLen = sizeof(sockaddr_in);

char msgBuf[] = "welcome,this is tcp_server";

while(true)

{

SOCKET conn_sock = accept(sock,(sockaddr*)&clientAddr,&nAddrLen);

if(conn_sock == INVALID_SOCKET)

{

std::cout << " - Error:Accepted a invalid client socket." << std::endl;

return -1;

}

std::cout << " - Connection from:" << inet_ntoa(clientAddr.sin_addr) << std::endl;

// 5. send data to client

send(conn_sock,msgBuf,strlen(msgBuf)+1,0);

}

// 6. close socket

closesocket(sock);

//----------------------------

WSACleanup();

return 0;

}

客戶端代碼，連接tcp服務器，用python實現

#tcp client

import socket

if __name__ == '__main__':

s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

addr=('127.0.0.1',4567)

s.connect(addr)

s.sendall(b'client_5001')

data = s.recv(1024)

print(data.decode('utf8'))

總結

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