client移植到linux平台下
#define WIN32_LEAN_AND_MEAN //windows.h和WinSock2.h有宏定义冲突，导致WinSock2.h必须要在windows.h前引用，定义该宏后可不用强制位置
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#ifdef _WIN32
#include<windows.h>
#include<WinSock2.h>
#else
#include<unistd.h>
#include<arpa/inet.h>
#include<cstring>
#define INVALID_SOCKET (SOCKET)(~0)
#define SOCKET_ERROR (-1)
#define SOCKET int
#endif
#include<iostream>
#include<thread>
#pragma comment(lib, "ws2_32.lib") //method_1
enum CMD
{
CMD_LOGIN,
CMD_LOGIN_RESULT,
CMD_LOGOUT,
CMD_LOGOUT_RESULT,
CMD_NEW_USER_JOIN,
CMD_EXIT
};
struct DataHeader
{
short data_length;
short cmd;
};
struct Login : public DataHeader
{
Login()
{
data_length = sizeof(Login);
cmd = CMD_LOGIN;
}
char username[32];
char password[32];
};
struct LoginResult : public DataHeader
{
LoginResult()
{
data_length = sizeof(LoginResult);
cmd = CMD_LOGIN_RESULT;
}
int result;
};
struct Logout : public DataHeader
{
Logout()
{
data_length = sizeof(Logout);
cmd = CMD_LOGOUT;
}
char username[32];
};
struct LogoutResult : public DataHeader
{
LogoutResult()
{
data_length = sizeof(LogoutResult);
cmd = CMD_LOGOUT_RESULT;
}
int result;
};
struct NewUserJOIN : public DataHeader
{
NewUserJOIN()
{
data_length = sizeof(NewUserJOIN);
cmd = CMD_NEW_USER_JOIN;
}
int sock;
};
bool judge_return_value(const char* function_name, int ret)
{
if (SOCKET_ERROR == ret)
{
std::cout << function_name << "错误" << std::endl;
return false;
}
return true;
}
bool return_value_error(const char* function_name, int ret)
{
if (SOCKET_ERROR == ret)
{
std::cout << function_name << "错误" << std::endl;
return true;
}
return false;
}
bool flag = true;
void cmdThread(SOCKET sock)
{
char send_buf[128] = {};
while (true)
{
//输入数据
std::cin >> send_buf;
if (strncmp(send_buf, "exit", sizeof("exit")) == 0)
{
DataHeader header = { 0, CMD_EXIT };
int buf_len = send(sock, (char*)&header, sizeof(DataHeader), 0);
flag = false;
judge_return_value("send", buf_len);
break;
}
else if (strncmp(send_buf, "login", sizeof("login")) == 0)
{
Login info = {};
strcpy(info.username, "aaron");
strcpy(info.password, "123456");
int buf_len = send(sock, (char*)&info, sizeof(Login), 0);
judge_return_value("send", buf_len);
LoginResult res = {};
buf_len = recv(sock, (char*)&res, sizeof(LoginResult), 0);
judge_return_value("recv", buf_len);
std::cout << "数据指令：" << res.cmd << "，数据长度：" << res.data_length << "，返回：" << res.result << std::endl;
}
else if (strncmp(send_buf, "logout", sizeof("logout")) == 0)
{
Logout info = {};
strcpy(info.username, "aaron");
int buf_len = send(sock, (char*)&info, sizeof(Logout), 0);
judge_return_value("send", buf_len);
LogoutResult res = {};
buf_len = recv(sock, (char*)&res, sizeof(LoginResult), 0);
judge_return_value("recv", buf_len);
std::cout << "数据指令：" << res.cmd << "，数据长度：" << res.data_length << "，返回：" << res.result << std::endl;
}
}
}
int main()
{
#ifdef _WIN32
WORD ver = MAKEWORD(2, 2);
WSADATA dat;
WSAStartup(ver, &dat); //Windows socket网络环境的启动函数，需要引入ws2_32库文件，可以使用method_1,也可以在属性界面链接器的输入选项添加依赖项
#endif
//创建socket
SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); //客户端的地址由系统自动分配，不需要绑定
//连接服务器
sockaddr_in server_addr = {};
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(6666);
#ifdef _WIN32
server_addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
#else
server_addr.sin_addr.s_addr = inet_addr("192.168.73.132");
#endif
int ret = connect(sock, (sockaddr*)&server_addr, sizeof(sockaddr_in)); //如果未发生错误，则返回零
judge_return_value("connect", ret);
//接受消息
char buf[128] = {};
int buf_len = recv(sock, buf, 128, 0);
judge_return_value("recv", buf_len);
std::cout << buf << std::endl;
char recv_buf[128] = {};
char send_buf[128] = {};
std::thread t(cmdThread, sock); //创建线程输入cmd
t.detach();
while (flag)
{
fd_set readfds;
FD_ZERO(&readfds);
FD_SET(sock, &readfds);
timeval time = { 0, 0 }; //设置等待时间为0，即非阻塞模式
int ret = select(sock + 1, &readfds, 0, 0, &time);
if (FD_ISSET(sock, &readfds))
{
DataHeader header = {};
int buf_len = recv(sock, (char*)&header, sizeof(DataHeader), 0);
NewUserJOIN new_user = {};
buf_len = recv(sock, (char *)&new_user + sizeof(DataHeader), sizeof(NewUserJOIN) - sizeof(DataHeader), 0); //如果未发生错误， send 将返回发送的总字节数，该字节数可能小于 len 参数中请求发送的数量
return_value_error("recv", buf_len);
std::cout << "新客户：" << new_user.sock << "加入" << std::endl;
}
}
std::cout << "连接退出" << std::endl;
getchar();
//关闭套接字
#ifdef _WIN32
closesocket(sock);
WSACleanup();
#else
close(sock);
#endif
return 0;
}
但是这样会导致主线程和cmd线程争抢服务器发来的包
server移植到linux平台下
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include<windows.h>
#include<WinSock2.h>
#pragma comment(lib,"ws2_32.lib")
#else
#include<unistd.h> //uni std
#include<arpa/inet.h>
#include<string.h>
#define SOCKET int
#define INVALID_SOCKET (SOCKET)(~0)
#define SOCKET_ERROR (-1)
#endif
#include<stdio.h>
#include<thread>
#include<vector>
#pragma comment(lib,"ws2_32.lib")
enum CMD
{
CMD_LOGIN,
CMD_LOGIN_RESULT,
CMD_LOGOUT,
CMD_LOGOUT_RESULT,
CMD_NEW_USER_JOIN,
CMD_ERROR
};
struct DataHeader
{
short dataLength;
short cmd;
};
//DataPackage
struct Login : public DataHeader
{
Login()
{
dataLength = sizeof(Login);
cmd = CMD_LOGIN;
}
char userName[32];
char PassWord[32];
};
struct LoginResult : public DataHeader
{
LoginResult()
{
dataLength = sizeof(LoginResult);
cmd = CMD_LOGIN_RESULT;
result = 0;
}
int result;
};
struct Logout : public DataHeader
{
Logout()
{
dataLength = sizeof(Logout);
cmd = CMD_LOGOUT;
}
char userName[32];
};
struct LogoutResult : public DataHeader
{
LogoutResult()
{
dataLength = sizeof(LogoutResult);
cmd = CMD_LOGOUT_RESULT;
result = 0;
}
int result;
};
struct NewUserJoin : public DataHeader
{
NewUserJoin()
{
dataLength = sizeof(NewUserJoin);
cmd = CMD_NEW_USER_JOIN;
scok = 0;
}
int scok;
};
std::vector<SOCKET> g_clients;
int processor(SOCKET _cSock)
{
//缓冲区
char szRecv[4096] = {};
// 5 接收客户端数据
int nLen = (int)recv(_cSock, szRecv, sizeof(DataHeader), 0);
DataHeader* header = (DataHeader*)szRecv;
if (nLen <= 0)
{
printf("客户端<Socket=%d>已退出，任务结束。\n", _cSock);
return -1;
}
switch (header->cmd)
{
case CMD_LOGIN:
{
recv(_cSock, szRecv + sizeof(DataHeader), header->dataLength - sizeof(DataHeader), 0);
Login* login = (Login*)szRecv;
printf("收到客户端<Socket=%d>请求：CMD_LOGIN,数据长度：%d,userName=%s PassWord=%s\n", _cSock, login->dataLength, login->userName, login->PassWord);
//忽略判断用户密码是否正确的过程
LoginResult ret;
send(_cSock, (char*)&ret, sizeof(LoginResult), 0);
}
break;
case CMD_LOGOUT:
{
recv(_cSock, szRecv + sizeof(DataHeader), header->dataLength - sizeof(DataHeader), 0);
Logout* logout = (Logout*)szRecv;
printf("收到客户端<Socket=%d>请求：CMD_LOGOUT,数据长度：%d,userName=%s \n", _cSock, logout->dataLength, logout->userName);
//忽略判断用户密码是否正确的过程
LogoutResult ret;
send(_cSock, (char*)&ret, sizeof(ret), 0);
}
break;
default:
{
DataHeader header = { 0,CMD_ERROR };
send(_cSock, (char*)&header, sizeof(header), 0);
}
break;
}
return 0;
}
int main()
{
#ifdef _WIN32
//启动Windows socket 2.x环境
WORD ver = MAKEWORD(2, 2);
WSADATA dat;
WSAStartup(ver, &dat);
//------------
#endif
//-- 用Socket API建立简易TCP服务端
// 1 建立一个socket 套接字
SOCKET _sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
// 2 bind 绑定用于接受客户端连接的网络端口
sockaddr_in _sin = {};
_sin.sin_family = AF_INET;
_sin.sin_port = htons(4567);//host to net unsigned short
#ifdef _WIN32
_sin.sin_addr.S_un.S_addr = INADDR_ANY;//inet_addr("127.0.0.1");
#else
_sin.sin_addr.s_addr = INADDR_ANY;
#endif
if (SOCKET_ERROR == bind(_sock, (sockaddr*)&_sin, sizeof(_sin)))
{
printf("错误,绑定网络端口失败...\n");
}
else {
printf("绑定网络端口成功...\n");
}
// 3 listen 监听网络端口
if (SOCKET_ERROR == listen(_sock, 5))
{
printf("错误,监听网络端口失败...\n");
}
else {
printf("监听网络端口成功...\n");
}
while (true)
{
//伯克利套接字 BSD socket
fd_set fdRead;//描述符（socket） 集合
fd_set fdWrite;
fd_set fdExp;
//清理集合
FD_ZERO(&fdRead);
FD_ZERO(&fdWrite);
FD_ZERO(&fdExp);
//将描述符（socket）加入集合
FD_SET(_sock, &fdRead);
FD_SET(_sock, &fdWrite);
FD_SET(_sock, &fdExp);
SOCKET maxSock = _sock;
for (int n = (int)g_clients.size() - 1; n >= 0; n--)
{
FD_SET(g_clients[n], &fdRead);
if (maxSock < g_clients[n])
{
maxSock = g_clients[n];
}
}
///nfds 是一个整数值 是指fd_set集合中所有描述符(socket)的范围，而不是数量
///既是所有文件描述符最大值+1 在Windows中这个参数可以写0
timeval t = { 1,0 };
int ret = select(maxSock + 1, &fdRead, &fdWrite, &fdExp, &t);
if (ret < 0)
{
printf("select任务结束。\n");
break;
}
//判断描述符（socket）是否在集合中
if (FD_ISSET(_sock, &fdRead))
{
FD_CLR(_sock, &fdRead);
// 4 accept 等待接受客户端连接
sockaddr_in clientAddr = {};
int nAddrLen = sizeof(sockaddr_in);
SOCKET _cSock = INVALID_SOCKET;
#ifdef _WIN32
_cSock = accept(_sock, (sockaddr*)&clientAddr, &nAddrLen);
#else
_cSock = accept(_sock, (sockaddr*)&clientAddr, (socklen_t *)&nAddrLen);
#endif
if (INVALID_SOCKET == _cSock)
{
printf("错误,接受到无效客户端SOCKET...\n");
}
else
{
for (int n = (int)g_clients.size() - 1; n >= 0; n--)
{
NewUserJoin userJoin;
send(g_clients[n], (const char*)&userJoin, sizeof(NewUserJoin), 0);
}
g_clients.push_back(_cSock);
printf("新客户端加入：socket = %d,IP = %s \n", (int)_cSock, inet_ntoa(clientAddr.sin_addr));
}
}
for (int n = (int)g_clients.size() - 1; n >= 0; n--)
{
if (FD_ISSET(g_clients[n], &fdRead))
{
if (-1 == processor(g_clients[n]))
{
auto iter = g_clients.begin() + n;//std::vector<SOCKET>::iterator
if (iter != g_clients.end())
{
g_clients.erase(iter);
}
}
}
}
//printf("空闲时间处理其它业务..\n");
}
#ifdef _WIN32
for (int n = (int)g_clients.size() - 1; n >= 0; n--)
{
closesocket(g_clients[n]);
}
// 8 关闭套节字closesocket
closesocket(_sock);
//------------
//清除Windows socket环境
WSACleanup();
#else
for (int n = (int)g_clients.size() - 1; n >= 0; n--)
{
close(g_clients[n]);
}
// 8 关闭套节字closesocket
close(_sock);
#endif
printf("已退出。\n");
getchar();
return 0;
}