1. 基于TCP协议的C/S模式
Server
#include <iostream>
#include <WinSock2.h> //网络头文件
using namespace std;
#pragma comment(lib, "WS2_32.lib") //网络库
int main()
{
WSADATA wsaData;
//打开网络库
if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
{
cout << "WSAStartup 无法初始化" << endl;
return 0;
}
//校验版本
if (2 != HIBYTE(wsaData.wVersion) || 2 != LOBYTE(wsaData.wVersion))
{
//说明版本不对,清理网络库
WSACleanup();
return 0;
}
//创建Socket
SOCKET socket_server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (socket_server == INVALID_SOCKET)
{
cout << "创建Socket无效" << endl;
WSACleanup();
return 0;
}
//绑定地址与端口
SOCKADDR_IN addr;
int addr_len = sizeof(SOCKADDR_IN);
int port = 9901;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
if (bind(socket_server, (const SOCKADDR*)&addr, addr_len) == SOCKET_ERROR)
{
cout << "绑定失败" << endl;
closesocket(socket_server);
WSACleanup();
return 0;
}
//开始监听
if (listen(socket_server, SOMAXCONN) == SOCKET_ERROR)
{
cout << "监听失败" << endl;
closesocket(socket_server);
WSACleanup();
return 0;
}
//创建客户端socket
SOCKET socket_client;
SOCKADDR_IN from;
int len = sizeof(from);
socket_client = accept(socket_server, (SOCKADDR*)&from, &len);
if (socket_client == INVALID_SOCKET)
{
cout << "创建客户端socket失败" << endl;
closesocket(socket_server);
WSACleanup();
return 0;
}
//与客户端收发消息
char buf[1500];
int buf_len = 1024;
while (1)
{
ZeroMemory(buf, sizeof(buf));
if (0 == recv(socket_client, buf, buf_len, 0))
{
cout << "连接已关闭" << endl;
closesocket(socket_server);
WSACleanup();
return 0;
}
cout << buf << endl;
if (strcmp(buf, "quit") == 0)
{
break;
}
}
closesocket(socket_server);
closesocket(socket_client);
WSACleanup();
system("pause");
return 0;
}
Client
#include <iostream>
#include <WinSock2.h>
using namespace std;
#pragma comment(lib, "WS2_32.lib")
int main()
{
//打开网络库
WSADATA WsaData;
if( WSAStartup(MAKEWORD(2,2), &WsaData) != 0 )
{
cout << "WsaData无法初始化" << endl;
}
//校验版本
if ( 2 != HIBYTE(WsaData.wVersion) || 2 != LOBYTE(WsaData.wVersion) )
{
//说明版本不对,清理网络库
WSACleanup();
return 0;
}
//创建套接字
SOCKET socket_server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (socket_server == INVALID_SOCKET)
{
cout << "创建Socket无效" << endl;
WSACleanup();
return 0;
}
//连接到服务器
//需要服务器的ip地址和端口号
SOCKADDR_IN addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(9901);
addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
if ( connect(socket_server, (SOCKADDR*)&addr, sizeof(addr)) == SOCKET_ERROR )
{
cout << "连接服务器失败" << endl;
WSACleanup();
return 0;
}
while (1)
{
char buf[1400];
cin >> buf;
if (strcmp(buf, "quit") == 0)
{
send(socket_server, buf, strlen(buf), 0);
break;
}
send(socket_server, buf, strlen(buf), 0);
}
closesocket(socket_server);
WSACleanup();
system("pause");
return 0;
}
2.基于UDP协议的C/S模式
Server
#include <WinSock2.h>
using namespace std;
#pragma comment(lib, "WS2_32.lib")
int main()
{
//打开网络库
WSADATA wsaData;
if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0)
{
cout << "打开网络库失败" << endl;
return 0;
}
//创建套接字
SOCKET server_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
SOCKADDR_IN addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(9901);
addr.sin_addr.S_un.S_addr = inet_addr("192.168.100.140");
if(bind(server_socket, (SOCKADDR*)&addr, sizeof(addr)) == SOCKET_ERROR)
{
cout << "绑定套接字失败!!!" <<endl;
closesocket(server_socket);
WSACleanup();
return 0;
}
while (true)
{
char buf[1500];
ZeroMemory(buf, sizeof(buf));
//发送数据的主机地址
SOCKADDR_IN client_addr;
int len = sizeof(client_addr);
recvfrom(server_socket, buf, sizeof(buf), 0, (SOCKADDR*)&client_addr, &len);
cout << buf << endl;
if (strcmp(buf, "quit") == 0)
{
break;
}
}
WSACleanup();
system("pause");
return 0;
}
#include <WinSock2.h>
using namespace std;
#pragma comment(lib, "WS2_32.lib")
{
//打开网络库
WSADATA WsaData;
if (WSAStartup(MAKEWORD(2,2), &WsaData) != 0)
{
cout << "打开网络库失败" << endl;
return 0;
}
SOCKET server_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (server_socket == INVALID_SOCKET)
{
cout << "创建socket失败" << endl;
WSACleanup();
return 0;
}
SOCKADDR_IN addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(9901);
addr.sin_addr.S_un.S_addr = inet_addr("192.168.100.140");
{
char buf[1400];
cin >> buf;
sendto(server_socket, buf, strlen(buf), 0, (SOCKADDR*)&addr, sizeof(addr));
if (strcmp(buf, "quit") == 0)
{
break;
}
}
WSACleanup();
system("pause");
return 0;
}