Я делаю сервер, клиентское приложение на основе c ++ консоли.
Что я сделал до сих пор:
- Я могу подключиться к серверу.
- Я могу отправлять сообщения на сервер.
- Сервер может отправлять сообщения обратно.
Но что я не могу понять, как я могу позволить серверу выступать также как клиент для отправки сообщений клиенту, пока он обрабатывает полученные сообщения от клиента?
Люди могут использовать это как пример: D
Хорошо, я также опубликую некоторые части кода:
Сервер:
#include "stdafx.h"
using namespace std;
//our main function
void main()
{
int numClients;
long antwoord;
char chatname[100];
char bericht[250]; //messages
char sbericht[250]; //smessages
//here we set the Winsock-DLL to start
WSAData wsaData;
WORD DLLVERSION;
DLLVERSION = MAKEWORD(2,1);
//here the Winsock-DLL will be started with WSAStartup
//version of the DLL
antwoord = WSAStartup(DLLVERSION, &wsaData);
if(antwoord != 0)
{
WSACleanup();
exit(1);
}
else
{
cout << "WSA started successfully" <<endl;
cout << "The status: \n" << wsaData.szSystemStatus <<endl;
}
//the DLL is started
//structure of our socket is being created
SOCKADDR_IN addr;
//addr is our struct
int addrlen = sizeof(addr);
//socket sListen - will listen to incoming connections
SOCKET sListen;
//socket sConnect - will be operating if a connection is found.
SOCKET sConnect;
//setup of our sockets
//opgezocht op internet - AF_INET bekend dat het lid is van de internet familie
//Sock_STREAM betekenend dat onze socket een verbinding georiënteerde socket is.
sConnect = socket(AF_INET,SOCK_STREAM,NULL);
//now we have setup our struct
//inet_addr is our IP adres of our socket(it will be the localhost ip
//that will be 127.0.0.1
addr.sin_addr.s_addr = inet_addr("192.168.1.103");
//retype of the family
addr.sin_family = AF_INET;
//now the server has the ip(127.0.0.1)
//and the port number (4444)
addr.sin_port = htons(4444);
//here we will define the setup for the sListen-socket
sListen = socket(AF_INET,SOCK_STREAM,NULL);
if (sConnect == INVALID_SOCKET)
{
cout << "Error at socket(): \n" << WSAGetLastError() <<endl;
WSACleanup();
}
else
{
cout << "Connect socket() is OK!" <<endl;
}
if(sListen == INVALID_SOCKET)
{
cout << "Error at socket(): \n" << WSAGetLastError() <<endl;
WSACleanup();
}
else
{
cout << "Listen socket() is OK!" <<endl;
}
//here the sListen-socket will be bind
//we say that the socket has the IP adress of (127.0.0.1) and is on port (4444)
//we let the socket become the struct "addr"
if(bind(sListen, (SOCKADDR*)&addr, sizeof(addr)) == SOCKET_ERROR)
{
cout << "bind() failed: \n" << WSAGetLastError() <<endl;
WSACleanup();
exit(1);
}
else{
cout << "bind() is OK!" <<endl;
}
//here we will tell what the server must do when a connection is found
//therefor we will create an endless loop
cout << "Waiting for a incoming connection..." <<endl;
for(;;)
{
//now we let the socket listen for incoming connections
//SOMAXCOMM heeft het nut dat het dan voordurend luisterd naar inkomende verbindingen zonder limiet
listen(sListen, SOMAXCONN);
while(numClients < SOMAXCONN)
{
//if a connection is found: show the message!
if(sConnect = accept(sListen, (SOCKADDR*)&addr, &addrlen))
{
cout << "A Connection was found!" <<endl;
antwoord = send(sConnect, "Welcome to our chat:", 21,NULL);
if(antwoord > 1)
{
antwoord = recv(sConnect, sbericht, sizeof(sbericht), NULL);
antwoord = recv(sConnect, chatname, sizeof(chatname), NULL);
while(antwoord = recv(sConnect, sbericht, sizeof(sbericht), NULL) && (antwoord = recv(sConnect, sbericht, sizeof(sbericht), NULL)) )
{
antwoord = send(sConnect, sbericht, sizeof(sbericht), NULL);
antwoord = send(sConnect, chatname, sizeof(chatname), NULL);
}
}
else
{
cout << "The connection to the client has been lost... \n" << "please exit the server." <<endl;
break;
}
numClients++;
}
}
}
}
Клиент:
// ChatServer.cpp : Defines the entry point for the console application.
//
//include of the stdafx.h file where importent files are being included
#include "stdafx.h"
using namespace std;
void smessage()
{
}
//our main function
int main()
{
//here we set the Winsock-DLL to start
string bevestiging;
char chatname[100];
char bericht[250];
char sbericht[250];
string strbericht;
string strsbericht;
long antwoord;
//here the Winsock-DLL will be started with WSAStartup
//version of the DLL
WSAData wsaData;
WORD DLLVERSION;
DLLVERSION = MAKEWORD(2,1);
antwoord = WSAStartup(DLLVERSION, &wsaData);
if(antwoord != 0)
{
exit(1);
}
else
{
cout << "WSA started successfully" <<endl;
cout << "The status: \n" << wsaData.szSystemStatus <<endl;
}
SOCKADDR_IN addr;
int addrlen = sizeof(addr);
SOCKET sConnect;
sConnect = socket(AF_INET, SOCK_STREAM, NULL);
if (sConnect == INVALID_SOCKET)
{
cout << "Error at socket(): \n" << WSAGetLastError() <<endl;
}
else
{
cout << "socket() is OK!\n" <<endl;
}
addr.sin_addr.s_addr = inet_addr("192.168.1.103");
addr.sin_family = AF_INET;
addr.sin_port = htons(4444);
cout << "What is your chat name?" <<endl;
cin.getline(chatname, 100);
cout << "Do you want to connect to the server? [Y/N]" <<endl;
cin >> bevestiging;
if (bevestiging == "N")
{
exit(1);
}
else
{
if(bevestiging == "Y")
{
connect(sConnect, (SOCKADDR*)&addr, sizeof(addr));
antwoord = recv(sConnect, bericht, sizeof(bericht), NULL);
strbericht = bericht;
cout << strbericht << chatname <<endl;
while(true)
{
if(antwoord > 1)
{
cin.clear();
cin.sync();
cout << chatname << " :" <<endl;
cin.getline(sbericht, 250);
antwoord = send(sConnect, sbericht, sizeof(sbericht), NULL);
antwoord = send(sConnect, chatname, sizeof(chatname), NULL);
while(antwoord = send(sConnect, sbericht, sizeof(sbericht), NULL) && (antwoord = send(sConnect, sbericht, sizeof(sbericht), NULL)))
{
antwoord = recv(sConnect, sbericht, sizeof(sbericht), NULL);
antwoord = recv(sConnect, chatname, sizeof(chatname), NULL);
cout << chatname << ":" <<endl;
cout << sbericht <<endl;
cin.getline(sbericht, 250);
}
}
else
{
cout << "The connection to the server has been lost... \n" << "please exit the client." <<endl;
}
}
}
}
}