TCP,UDP WINSOCK通信 VC

#include <stdio.h> #include <winsock.h> void main() { WSADATA wsaData; WORD wVersonRequested; int err; wVersonRequested = MAKEWORD(2, 2); //SOCKET 版本信息 err = WSAStartup(wVersonRequested, &wsaData); if(err != 0) { printf("WINDOWS SOCKET2.2初始化失败!\n"); return; } SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); //创建套接字 SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY); addrSrv.sin_family = AF_INET; addrSrv.sin_port = htons(9999); bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)); //绑定本地IP和端口号 listen(sockSrv, 5); //监听 printf("=================监听中=================\n"); SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); while (1)//循环等待 { char sendBuf[100]; SOCKET sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); //接受连接 sprintf(sendBuf, "[%s]：欢迎来到SOCKET测试平台!\n", inet_ntoa(addrClient.sin_addr)); send(sockConn, sendBuf, strlen(sendBuf)+1, 0); //发送信息 char recvBuf[100]; recv(sockConn, recvBuf, 100, 0); //接受信息 sprintf(recvBuf, "%s[%s]!\n", recvBuf, inet_ntoa(addrClient.sin_addr)); printf("%s", recvBuf); closesocket(sockConn); //关闭连接套接字 } }