游戏网络通讯方式基于TCP

#include "stdafx.h"
#include< stdio.h >
#include< stdlib.h >
#include< windows.h >
#include< winsock.h >
#include< string.h >

#pragma comment( lib, "ws2_32.lib" )

#define PORT 2046
#define BACKLOG 10
#define TRUE 1

int _tmain(int argc, _TCHAR* argv[])
{
//判断是否输入了端口号
/*if (argc != 2){
printf("Usage: %s PortNumber/n", argv[0]);
exit(-1);
}*/
//把端口号转化成整数
/*short port;
if ((port = atoi(argv[1])) == 0){
printf("端口号有误！");
exit(-1);
}*/
WSADATA wsa;
//初始化套接字DLL
if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0){
printf("套接字初始化失败!");
exit(-1);
}
//创建套接字
SOCKET serverSocket;
if ((serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET){
printf("创建套接字失败！");
exit(-1);
}
struct sockaddr_in serverAddress;
memset(&serverAddress, 0, sizeof(sockaddr_in));
serverAddress.sin_family = AF_INET;
serverAddress.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
serverAddress.sin_port = htons(PORT);
//绑定
if (bind(serverSocket, (sockaddr*)&serverAddress, sizeof(serverAddress)) == SOCKET_ERROR){
printf("套接字绑定到端口失败！端口: %d\n", PORT);
exit(-1);
}
//进入侦听状态
if (listen(serverSocket, SOMAXCONN) == SOCKET_ERROR){
printf("侦听失败！");
exit(-1);
}
printf("Server %d is listening......\n", PORT);
while (true)
{
SOCKET clientSocket;//用来和客户端通信的套接字
struct sockaddr_in clientAddress;//用来和客户端通信的套接字地址
memset(&clientAddress, 0, sizeof(clientAddress));
int addrlen = sizeof(clientAddress);
//接受连接
if ((clientSocket = accept(serverSocket, (sockaddr*)&clientAddress, &addrlen)) == INVALID_SOCKET){
printf("接受客户端连接失败！");
closesocket(clientSocket);
continue;
}
printf("Accept connection from %s\n", inet_ntoa(clientAddress.sin_addr));
char buf[4096];
//while (1){
//接收数据
int bytes;
if ((bytes = recv(clientSocket, buf, sizeof(buf), 0)) == SOCKET_ERROR){
printf("接收数据失败!\n");
closesocket(clientSocket);
continue;
}
buf[bytes] = '\0';
printf("Message from %s: %s\n", inet_ntoa(clientAddress.sin_addr), buf);
if (send(clientSocket, buf, bytes, 0) == SOCKET_ERROR){
printf("发送数据失败！");
closesocket(clientSocket);
continue;
}
closesocket(clientSocket);
//清理套接字占用的资源
printf("%s exit!\n", inet_ntoa(clientAddress.sin_addr));
}

WSACleanup();
return 0;
}

</pre><pre name="code" class="cpp">#include "stdafx.h"
#include< stdio.h >
#include< stdlib.h >
#include< windows.h >
#include< winsock.h >
#include< string.h >

#pragma comment( lib, "ws2_32.lib" )

#define PORT 2046
#define BACKLOG 10
#define TRUE 1
#define MAXDATASIZE 100

int _tmain(int argc, _TCHAR* argv[])
{
//判断是否输入了IP地址和端口号
/*if (argc != 3){
printf("Usage: %s IPAddress PortNumber/n", argv[0]);
exit(-1);
}*/
//把字符串的IP地址转化为u_long
unsigned long ip = inet_addr("127.0.0.1");
/*if ((ip = inet_addr(argv[1])) == INADDR_NONE){
printf("不合法的IP地址：%s", argv[1]);
exit(-1);
}*/
//把端口号转化成整数
//short port;
/*if ((port = atoi(argv[2])) == 0){
printf("端口号有误！");
exit(-1);
}*/
printf("Connecting to %s:%d......\n", inet_ntoa(*(in_addr*)&ip), PORT);
WSADATA wsa;
//初始化套接字DLL
if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0){
printf("套接字初始化失败!");
exit(-1);
}
while (1){
//创建套接字
SOCKET sock;
if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET){
printf("创建套接字失败！");
exit(-1);
}
struct sockaddr_in serverAddress;
memset(&serverAddress, 0, sizeof(sockaddr_in));
serverAddress.sin_family = AF_INET;
serverAddress.sin_addr.S_un.S_addr = ip;
serverAddress.sin_port = htons(PORT);
//建立和服务器的连接
if (connect(sock, (sockaddr*)&serverAddress, sizeof(serverAddress)) == SOCKET_ERROR){
printf("建立连接失败！");
exit(-1);
}
char buf[4096];

printf(">");
//从控制台读取一行数据
gets(buf);
int index = 0;
while (buf[index])
{
buf[index]=buf[index]^0xf;
index++;
}
//发送给服务器
if (send(sock, buf, strlen(buf), 0) == SOCKET_ERROR){
printf("发送数据失败！");
exit(-1);
}
int bytes;
if ((bytes = recv(sock, buf, sizeof(buf), 0)) == SOCKET_ERROR){
printf("接收数据失败!/n");
exit(-1);
}
index = 0;
while (buf[index])
{
buf[index] = buf[index] ^ 0xf;
index++;
}
buf[bytes] = '\0';
printf("Message from %s: %s\n", inet_ntoa(serverAddress.sin_addr), buf);
closesocket(sock);
}
//清理套接字占用的资源
WSACleanup();
return 0;
}