TCP通信-优快云博客

本文链接：https://blog.youkuaiyun.com/scq2099yt/article/details/2137003

本文提供了一个简单的TCP客户端和服务端的实现示例，使用Winsock库在Windows环境下进行开发。客户端向服务端发送消息，服务端接收并打印该消息。

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TCP客户端源程序
#include <stdio.h>
#include <winsock2.h>
#pragma comment(lib, "WS2_32.lib")

#define BUF_SIZE 1024
#define SERVER_IP "127.0.0.1"
#define SERVER_PORT 5678

int main(int argc, char* argv)
{
WSADATA wsaData;
SOCKADDR_IN serverAddr;
SOCKET socketC;
char sendbuf[BUF_SIZE] = "Hello TCP World!";

WSAStartup(MAKEWORD(1,1), &wsaData);

socketC = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(SERVER_PORT);
serverAddr.sin_addr.s_addr = inet_addr(SERVER_IP);

connect(socketC, (SOCKADDR*)&serverAddr, sizeof(serverAddr));

send(socketC, sendbuf,sizeof(sendbuf), 0);

closesocket(socketC);

WSACleanup();

return 0:
}

TCP服务器端源程序
#include <stdio.h>
#include <winsock2.h>
#pragma comment(lib, "WS2_32.lib")

#define BUF_SIZE 1024
#define SERVER_IP "127.0.0.1"
#define SERVER_PORT 5678

int main(int argc, char** argv)
{
WSADATA wsaData;
SOCKET socketL; // socket for listening
SOCKET socketC; // socket for Communication
SOCKADDR_IN serverAddr;
int nRet = -1;
char recvbuf[BUF_SIZE];

WSAStartup(MAKEWORD(1,1), &wsaData);

socketL = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(SERVER_PORT);
serverAddr.sin_addr.s_addr = htonl(INADDR_ANY);

bind(socketL, (SOCKADDR*)&serverAddr, sizeof(serverAddr));

listen(socketL, 5);

socketC = accept(socketL, NULL, NULL);
if (socketC != INVALID_SOCKET)
{
nRet = recv(socketC, recvbuf, sizeof(recvbuf), 0);
if (nRet > 0)
printf("%s ", recvbuf);
}

closesocket(socketC);
closesocket(socketL);

WSACleanup();

return 0;
}