TCP/IP(Transmission Control Protocol/Internet Protocol)即传输控制协议/网间协议,是一个工业标准的协议集,它是为广域网(WANs)设计的。UDP(User Data Protocol,用户数据报协议)是与TCP相对应的协议。它是属于TCP/IP协议族中的一种。
Socket是应用层与TCP/IP协议族通信的中间软件抽象层,它是一组接口。在设计模式中,Socket其实就是一个门面模式,它把复杂的TCP/IP协议族隐藏在Socket接口后面,对用户来说,一组简单的接口就是全部,让Socket去组织数据,以符合指定的协议。
与Socket相关的网络编程服务器端实现
#include <iostream>
#include <Windows.h>
using namespace std;
#define PORT 4000
#define IP_ADDRESS "127.0.0.1" DWORD WINAPI ClientThread(LPVOID lpParameter)
{
SOCKET CientSocket = (SOCKET)lpParameter;
int Ret = 0;
char RecvBuffer[MAX_PATH]; while ( true )
{
memset(RecvBuffer, 0x00, sizeof(RecvBuffer));
Ret = recv(CientSocket, RecvBuffer, MAX_PATH, 0);
if ( Ret == 0 || Ret == SOCKET_ERROR )
{
cout<<"客户端退出!"<<endl;
break;
}
cout<<"接收到客户信息为:"<<RecvBuffer<<endl;
} return 0;
} int main(int argc, char* argv[])
{
WSADATA Ws;
SOCKET ServerSocket, CientSocket;
struct sockaddr_in LocalAddr, ClientAddr;
int Ret = 0;
int AddrLen = 0;
HANDLE hThread = NULL; //Init Windows Socket
if ( WSAStartup(MAKEWORD(2,2), &Ws) != 0 )
{
cout<<"Init Windows Socket Failed::"<<GetLastError()<<endl;
return -1; }
//Create Socket
ServerSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (ServerSocket == INVALID_SOCKET )
{
cout<<"Create Socket Failed::"<<GetLastError()<<endl;
return -1;
} LocalAddr.sin_family = AF_INET;
LocalAddr.sin_addr.s_addr = inet_addr(IP_ADDRESS);
LocalAddr.sin_port = htons(PORT);
memset(LocalAddr.sin_zero, 0x00, 8); //Bind Socket
Ret = bind(ServerSocket, (struct sockaddr*)&LocalAddr, sizeof(LocalAddr));
if ( Ret != 0 )
{
cout<<"Bind Socket Failed::"<<GetLastError()<<endl;
return -1;
} Ret = listen(ServerSocket, 10);
if ( Ret != 0 )
{
cout<<"listen Socket Failed::"<<GetLastError()<<endl;
return -1;
} cout<<"服务端已经启动"<<endl; while ( true )
{
AddrLen = sizeof(ClientAddr);
CientSocket = accept(ServerSocket, (struct sockaddr*)&ClientAddr, &AddrLen);
if ( CientSocket == INVALID_SOCKET )
{
cout<<"Accept Failed::"<<GetLastError()<<endl;
break;
} cout<<"客户端连接::"<<inet_ntoa(ClientAddr.sin_addr)<<":"<<ClientAddr.sin_port<<endl; hThread = CreateThread(NULL, 0, ClientThread, (LPVOID)CientSocket, 0, NULL);
if ( hThread == NULL )
{
cout<<"Create Thread Failed!"<<endl;
break;
} CloseHandle(hThread);
}
closesocket(ServerSocket);
closesocket(CientSocket);
WSACleanup();
return 0;
}
客户端实现:
//Client.cpp
#include <iostream>
#include <Windows.h> using namespace std; #define PORT 4000
#define IP_ADDRESS "127.0.0.1" int main(int argc, char* argv[])
{
WSADATA Ws;
SOCKET CientSocket;
struct sockaddr_in ServerAddr;
int Ret = 0;
int AddrLen = 0;
HANDLE hThread = NULL;
char SendBuffer[MAX_PATH]; //Init Windows Socket
if ( WSAStartup(MAKEWORD(2,2), &Ws) != 0 )
{
cout<<"Init Windows Socket Failed::"<<GetLastError()<<endl;
return -1;
} //Create Socket
CientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if ( CientSocket == INVALID_SOCKET )
{
cout<<"Create Socket Failed::"<<GetLastError()<<endl;
return -1;
} ServerAddr.sin_family = AF_INET;
ServerAddr.sin_addr.s_addr = inet_addr(IP_ADDRESS);
ServerAddr.sin_port = htons(PORT);
memset(ServerAddr.sin_zero, 0x00, 8); Ret = connect(CientSocket,(struct sockaddr*)&ServerAddr, sizeof(ServerAddr));
if ( Ret == SOCKET_ERROR )
{
cout<<"Connect Error::"<<GetLastError()<<endl;
return -1;
}
else
{
cout<<"连接成功!"<<endl;
} while ( true )
{
cin.getline(SendBuffer, sizeof(SendBuffer));
Ret = send(CientSocket, SendBuffer, (int)strlen(SendBuffer), 0);
if ( Ret == SOCKET_ERROR )
{
cout<<"Send Info Error::"<<GetLastError()<<endl;
break;
}
} closesocket(CientSocket);
WSACleanup(); return 0;
}