1 将客户端移植到Linux和MAC OS
1.1 概述
我们这里把将客户端移植到Linux和MAC OS,由于Linux和MAC OS都是从Unix继承而来,所以两者关于socket部分操作接口完全相同。我们只需要关注和windows之间的差异即可。
1.2 客户端移植代码
客户端移植代码如下:
client.cpp:
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#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>
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;
};
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("与服务器断开连接,任务结束。\n");
return -1;
}
switch (header->cmd)
{
case CMD_LOGIN_RESULT:
{
recv(_cSock, szRecv + sizeof(DataHeader), header->dataLength - sizeof(DataHeader), 0);
LoginResult* login = (LoginResult*)szRecv;
printf("收到服务端消息:CMD_LOGIN_RESULT,数据长度:%d\n", login->dataLength);
}
break;
case CMD_LOGOUT_RESULT:
{
recv(_cSock, szRecv + sizeof(DataHeader), header->dataLength - sizeof(DataHeader), 0);
LogoutResult* logout = (LogoutResult*)szRecv;
printf("收到服务端消息:CMD_LOGOUT_RESULT,数据长度:%d\n", logout->dataLength);
}
break;
case CMD_NEW_USER_JOIN:
{
recv(_cSock, szRecv + sizeof(DataHeader), header->dataLength - sizeof(DataHeader), 0);
NewUserJoin* userJoin = (NewUserJoin*)szRecv;
printf("收到服务端消息:CMD_NEW_USER_JOIN,数据长度:%d\n", userJoin->dataLength);
}
break;
}
return 0;
}
bool g_bRun = true;
void cmdThread(SOCKET sock)
{
while (true)
{
char cmdBuf[256] = {};
scanf("%s", cmdBuf);
if (0 == strcmp(cmdBuf, "exit"))
{
g_bRun = false;
printf("退出cmdThread线程\n");
break;
}
else if (0 == strcmp(cmdBuf, "login"))
{
Login login;
strcpy(login.userName, "lyd");
strcpy(login.PassWord, "lydmm");
send(sock, (const char*)&login, sizeof(Login), 0);
}
else if (0 == strcmp(cmdBuf, "logout"))
{
Logout logout;
strcpy(logout.userName, "lyd");
send(sock, (const char*)&logout, sizeof(Logout), 0);
}
else {
printf("不支持的命令。\n");
}
}
}
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客户端
// 1 建立一个socket
SOCKET _sock = socket(AF_INET, SOCK_STREAM, 0);
if (INVALID_SOCKET == _sock)
{
printf("错误,建立Socket失败...\n");
}
else {
printf("建立Socket成功...\n");
}
// 2 连接服务器 connect
sockaddr_in _sin = {};
_sin.sin_family = AF_INET;
_sin.sin_port = htons(4567);
#ifdef _WIN32
_sin.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
#else
_sin.sin_addr.s_addr = inet_addr("192.168.74.1");
#endif
int ret = connect(_sock, (sockaddr*)&_sin, sizeof(sockaddr_in));
if (SOCKET_ERROR == ret)
{
printf("错误,连接服务器失败...\n");
}
else {
printf("连接服务器成功...\n");
}
//启动线程
std::thread t1(cmdThread, _sock);
t1.detach();
while (g_bRun)
{
fd_set fdReads;
FD_ZERO(&fdReads);
FD_SET(_sock, &fdReads);
timeval t = { 1,0 };
int ret = select(_sock + 1, &fdReads, 0, 0, &t);
if (ret < 0)
{
printf("select任务结束1\n");
break;
}
if (FD_ISSET(_sock, &fdReads))
{
FD_CLR(_sock, &fdReads);
if (-1 == processor(_sock))
{
printf("select任务结束2\n");
break;
}
}
//printf("空闲时间处理其它业务..\n");
//Sleep(1000);
}
// 7 关闭套节字closesocket
#ifdef _WIN32
closesocket(_sock);
//清除Windows socket环境
WSACleanup();
#else
close(_sock);
#endif
printf("已退出。\n");
getchar();
return 0;
}
编译选项:g++ client.cpp -std=c++11 -pthread -o client
。
参考资料: