windows环境下C语言socket编程_mingw socket编程 cmake-优快云博客

最近由于实验需要，要求写一个c程序与java程序通信的软件，为了测试首先写了一个windows环境下c语言的socket（tcp）通信程序。

首先socket通信的步骤：

图一 socket通信步骤（转载)

图二三次握手协议（转载）

图三三次握手协议（转载）

代码服务器端

    #include <winsock2.h>
    #include <windows.h>
    #pragma comment(lib,"ws2_32.lib")

    int main(int argc, char* argv[])
    {
       //初始化WSA
       WORD sockVersion = MAKEWORD(2, 2);
       WSADATA wsaData;
       if (WSAStartup(sockVersion, &wsaData) != 0)
       {
           return 0;
       }

       //创建套接字
       SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
       if (slisten == INVALID_SOCKET)
       {
           printf("socket error !");
           return 0;
       }

       //绑定IP和端口
       struct sockaddr_in sin;
       sin.sin_family = AF_INET;
       sin.sin_port = htons(8888);
       sin.sin_addr.S_un.S_addr = INADDR_ANY;
       if (bind(slisten, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR)
       {
           printf("bind error !");
       }

       //开始监听
       if (listen(slisten, 5) == SOCKET_ERROR)
       {
           printf("listen error !");
           return 0;
       }

       //循环接收数据
       SOCKET sClient;
       struct sockaddr_in remoteAddr;
       int nAddrlen = sizeof(remoteAddr);
       //char revData[255];
       printf("等待连接...\n");
       sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
       while (1)
       {
           char revData[255];
           //printf("等待连接...\n");
           //sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
           if (sClient == INVALID_SOCKET)
           {
               printf("accept error !");
               continue;
           }
           printf("接受到一个连接：%s \r\n", inet_ntoa(remoteAddr.sin_addr));

           //接收数据
           int ret = recv(sClient, revData, 255, 0);
           //printf(ret);
           if (ret > 0)
           {
               revData[ret] = 0x00;
               printf(revData);
           }
           //发送数据
           char * sendData = "你好，TCP客户端！\n";
           send(sClient, sendData, strlen(sendData), 0);
       }
           closesocket(sClient);
       closesocket(slisten);
       WSACleanup();
       return 0;
    }

代码客户端

    #include <winsock2.h>
    #include <windows.h>
    #pragma comment(lib,"ws2_32.lib")
    #include <STDIO.H>
    int main(int argc, char* argv[])
    {
       WORD sockVersion = MAKEWORD(2, 2);
       WSADATA data;
       if (WSAStartup(sockVersion, &data) != 0)
       {
           return 0;
       }

       SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
       if (sclient == INVALID_SOCKET)
       {
           printf("invalid socket !");
           return 0;
       }

       struct sockaddr_in serAddr;
       serAddr.sin_family = AF_INET;
       serAddr.sin_port = htons(8888);
       serAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
       if (connect(sclient, (struct sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
       {
           printf("connect error !");
           closesocket(sclient);
           return 0;
       }
       for (int i = 0; i < 1000; i++)
       {

           char * sendData = "csi接收二进制文件未解析\n";
           send(sclient, sendData, strlen(sendData), 0);
           char recData[255];
           /*int ret = recv(sclient, recData, 255, 0);
           if (ret > 0)
           {

               recData[ret] = 0x00;
               //printf(recData);
               printf("%d%s",i,recData);
           }
           */
       }
       closesocket(sclient);
       WSACleanup();
       return 0;
    }