c++實現socket通訊測試

伺服器端代碼：

// socketTest.cpp : 定義控制台應用程式的進入點。//#include "stdafx.h"#include <iostream>#include <winsock.h>#pragma  comment (lib,"ws2_32.lib")#define  MAXBUFLEN 256#define  PORT 44965using namespace std;int _tmain(int argc, _TCHAR* argv[]){WSADATA Data;SOCKADDR_IN serverSockAddr;SOCKADDR_IN clientSockAddr;SOCKET serversocket;  //其實就是一個unsig int類型，用來記錄已經建立或者尚未建立的通訊端號SOCKET clientsocket;int addrlen = sizeof(SOCKADDR_IN);   //16int status;int numrcv;char buffer[MAXBUFLEN];//初始化windows Socket Dllstatus = WSAStartup(MAKEWORD(1,1),&Data);if (0!=status){cout<<"初始化失敗"<<endl;}//清0memset(&serverSockAddr,0,sizeof(serverSockAddr));//初始化serverSockAddr.sin_port = htons(PORT);serverSockAddr.sin_family = AF_INET;    //指定地址協議族serverSockAddr.sin_addr.s_addr = htonl(INADDR_ANY);  //初始化ip地址0,0,0,0 任何ip都可以串連//建立通訊端serversocket = socket(AF_INET,SOCK_STREAM/*通訊端類型*/,0/*通訊端使用的特定協議*/);if (INVALID_SOCKET == serversocket){cout<<"建立socket失敗"<<endl;}//綁定socket到特定地址(結構體地址)status = bind(serversocket,(LPSOCKADDR)&serverSockAddr,sizeof(serverSockAddr));if (SOCKET_ERROR==status){cout<<"綁定地址失敗"<<endl;}//允許外來申請連結請求，或者說就是監聽status = listen(serversocket/*通訊端號*/,2/*最大容許連結的通訊端個數*/);if (SOCKET_ERROR == status){cout<<"監聽失敗"<<endl;}//當有請求申請是就接受連結請求clientsocket = accept(serversocket,(LPSOCKADDR)&clientsocket,&addrlen);while(1){numrcv = recv(clientsocket/*已經建立的通訊端*/,buffer/*接受輸入資料緩衝器的指標*/,MAXBUFLEN/*接受緩衝區大小*/,0/*傳輸控制方式*/);if ((0==numrcv)||(numrcv==SOCKET_ERROR)){cout<<"連結受到限制"<<endl;status = closesocket(clientsocket);if (SOCKET_ERROR==status)cout<<"取消連結失敗"<<endl;status = WSACleanup();if (SOCKET_ERROR==status)cout<<"清理連結失敗"<<endl;return(1);}cout<<"接受到用戶端發過來的訊息內容是："<<buffer<<endl;cout<<"輸入想要發送給用戶端發送的訊息內容並按斷行符號發送"<<endl;int numsnt;char *toSendtxt=new char[256];cin>>toSendtxt;numsnt=send(clientsocket, toSendtxt, strlen(toSendtxt) + 1, 0);if (numsnt != (int)strlen(toSendtxt) + 1){cout << "Connection terminated" << endl;status=closesocket(clientsocket);if (status == SOCKET_ERROR)cout<< "ERROR: closesocket unsuccessful" << endl;status=WSACleanup();if (status == SOCKET_ERROR)cout<< "ERROR: WSACleanup unsuccessful" << endl;return(1);}cout<<"等待繼續接受用戶端發來的訊息.........."<<endl;}return 0;}/*總結通訊伺服器端，建立一個socket通訊，        socket()                    綁定這個socket到地址結構體，bind()監聽外來申請建立連結請求,   listen() 接受外來申請的連結請求,     accept()接受用戶端發來的訊息內容，  recv()向用戶端發送訊息，          send()*/

 

用戶端代碼：

// socketclientTest.cpp : 定義控制台應用程式的進入點。//#include "stdafx.h"#include <iostream>#include <winsock.h>#pragma comment(lib,"ws2_32.lib")#define  MAXBUFLEN 256#define PORT 44965#define DEST_IP_ADDR "127.0.0.1" //想要連結的目標Server addressusing namespace std;int _tmain(int argc, _TCHAR* argv[]){WSADATA Data;SOCKADDR_IN destSockAddr;SOCKET destSocket;unsigned long destAddr;int status;/* initialize the Windows Socket DLL */status=WSAStartup(MAKEWORD(1, 1), &Data);if (status != 0)cout<< "ERROR: WSAStartup unsuccessful"<<endl;/* convert IP address into in_addr form */destAddr=inet_addr(DEST_IP_ADDR);/* copy destAddr into sockaddr_in structure */memcpy(&destSockAddr.sin_addr, &destAddr, sizeof(destAddr));/* specify the port portion of the address */destSockAddr.sin_port=htons(PORT);/* specify the address family as Internet */destSockAddr.sin_family=AF_INET;/* create a socket */destSocket=socket(AF_INET, SOCK_STREAM, 0);if (destSocket == INVALID_SOCKET){cout<< "ERROR: socket unsuccessful" << endl;status=WSACleanup();if (status == SOCKET_ERROR)cout<< "ERROR: WSACleanup unsuccessful" << endl;return(1);}cout<< "Trying to connect to IP Address: " << DEST_IP_ADDR <<endl;/* connect to the server */status=connect(destSocket, (LPSOCKADDR)&destSockAddr, sizeof(destSockAddr));if (status == SOCKET_ERROR){cout<< "ERROR: connect unsuccessful" << endl;status=closesocket(destSocket);if (status == SOCKET_ERROR)cout<< "ERROR: closesocket unsuccessful"<< endl;status=WSACleanup();if (status == SOCKET_ERROR)cout<< "ERROR: WSACleanup unsuccessful"<< endl;return(1);}cout << "Connected..." << endl;while(1){int numsnt;char *toSendtxt=new char[256];cout << "輸入想要發送給伺服器的訊息內容並按斷行符號發送:" << endl;cin>>toSendtxt;numsnt=send(destSocket, toSendtxt, strlen(toSendtxt) + 1, 0);if (numsnt != (int)strlen(toSendtxt) + 1){cout << "Connection terminated" << endl;status=closesocket(destSocket);if (status == SOCKET_ERROR)cout<< "ERROR: closesocket unsuccessful" << endl;status=WSACleanup();if (status == SOCKET_ERROR)cout<< "ERROR: WSACleanup unsuccessful" << endl;return(1);}/* Wait before sending the message again */cout<<"向伺服器發送的訊息已經成功發送現在等待接受伺服器發來的訊息......"<<endl;int numrcv;char buffer[MAXBUFLEN];numrcv = recv(destSocket/*已經建立的通訊端*/,buffer/*接受輸入資料緩衝器的指標*/,MAXBUFLEN/*接受緩衝區大小*/,0/*傳輸控制方式*/);if ((0==numrcv)||(numrcv==SOCKET_ERROR)){cout<<"連結受到限制"<<endl;status = closesocket(destSocket);if (SOCKET_ERROR==status)cout<<"取消連結失敗"<<endl;status = WSACleanup();if (SOCKET_ERROR==status)cout<<"清理連結失敗"<<endl;return(1);}cout<<"伺服器發來的訊息內容是："<<buffer<<endl;} /* while */return 0;}/*總結通訊用戶端，  建立一個socket通訊，          socket()                    連結目標伺服器端，            connect()                    向伺服器發送訊息，            send()接受伺服器端發來的訊息內容，  recv()*/