Windows sockets网络开发-基本TCP套接字编程

1、服务器

// vs_demo.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include <Windows.h>#include <WinSock2.h>#pragma comment(lib, "ws2_32.lib")#define  LISTEN_PORT 5000#define  BUFFER_SIZE 1024int server_daemon(){WSADATA wsd;SOCKET sock_listen;int rc;if(WSAStartup(MAKEWORD(2,2), &wsd) != 0){printf("error:WSAStartup failed!\n");return -1;}//create socketsock_listen = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if(INVALID_SOCKET == sock_listen){printf("error:socket failed!\n");WSACleanup();return -2;}//set socket addresssockaddr_in local_addr;local_addr.sin_family = AF_INET;local_addr.sin_port = htons(LISTEN_PORT);local_addr.sin_addr.s_addr = INADDR_ANY;//bindrc = bind(sock_listen, (struct sockaddr*)&local_addr, sizeof(sockaddr_in));if(SOCKET_ERROR == rc){printf("error:bind failed!\n");closesocket(sock_listen);WSACleanup();return -3;}//listenrc = listen(sock_listen, 5);if(SOCKET_ERROR == rc){printf("error:listen failed!\n");closesocket(sock_listen);WSACleanup();return -4;}//accept client's connectionsockaddr_in remote_addr;int remote_len = sizeof(remote_addr);SOCKET sock_conn = accept(sock_listen, (struct sockaddr*)&remote_addr, &remote_len);if(INVALID_SOCKET == rc){printf("error: accept failed!\n");closesocket(sock_listen);WSACleanup();return -5;}//recv datachar buffer[BUFFER_SIZE] = {0};rc = recv(sock_conn, buffer, BUFFER_SIZE, 0);char buffer1[BUFFER_SIZE] = {0};rc = recv(sock_conn, buffer1, BUFFER_SIZE, 0);//客户端调用多少次send，服务器端调用多少次的recvif(SOCKET_ERROR == rc){printf("error:recv failed!\n");closesocket(sock_listen);closesocket(sock_conn);WSACleanup();return -6;}printf("[recv]: %s\n", buffer);//exitclosesocket(sock_listen);closesocket(sock_conn);WSACleanup();return 0;}int _tmain(int argc, _TCHAR* argv[]){server_daemon();getchar();return 0;}

2、客户端

// vs_demo.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include <Windows.h>#include <WinSock2.h>#pragma comment(lib, "ws2_32.lib")#define  LISTEN_PORT 5000#define  BUFFER_SIZE 1024int client_daemon(){WSADATA wsd;if(WSAStartup(MAKEWORD(2,2),&wsd) !=0){printf("error:WSAStartup failed!\n");return -1;}SOCKET sock_conn;sock_conn = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if(INVALID_SOCKET == sock_conn){printf("error:socket failed!\n");WSACleanup();return -2;}//server addresssockaddr_in server_addr;server_addr.sin_family = AF_INET;server_addr.sin_port = htons(LISTEN_PORT);server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");//connectint rc = connect(sock_conn, (struct sockaddr*)&server_addr, sizeof(server_addr));if(SOCKET_ERROR == rc){printf("error:connect failed!\n");closesocket(sock_conn);WSACleanup();return -3;}//send datachar buffer[BUFFER_SIZE] = {0};strcpy_s(buffer, sizeof(buffer), "Hello,Server!");rc = send(sock_conn, buffer,(int) strlen(buffer), 0);char buffer1[BUFFER_SIZE] = {0};strcpy_s(buffer1, sizeof(buffer1), "this is tcp data!");rc = send(sock_conn, buffer1,(int) strlen(buffer1), 0);if(SOCKET_ERROR == rc){printf("error:send failed!\n");closesocket(sock_conn);WSACleanup();return -4;}printf("[send]: %s\n",buffer);//close socketclosesocket(sock_conn);WSACleanup();return 0;}int _tmain(int argc, _TCHAR* argv[]){client_daemon();getchar();return 0;}