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Highly Adaptive Penguin
Join Date: May 2005
Location: United States
Posts: 251
Rep Power: 4 
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problem with network program
im created a simple chat program, but it doesnt send or receive messages very well, and you have to send a message before you can receive the one that was sent to you. does anyone have any suggestions?
here's the code for the server:
#include<winsock.h>
#include<iostream.h>
#include<string.h>
#include<conio.h>
#include<fstream.h>
#pragma comment(lib,"wsock32.lib")
#define MAX_CLIENTS 30
int net;
int client_count=0;
ofstream outfile;
char data[50];
char rdata[50];
SOCKET server;
SOCKET client;
int main()
{
WORD sockversion;
WSADATA wsaData;
sockversion=MAKEWORD(1,1);
WSAStartup(sockversion,&wsaData);
if((server=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP))!=INVALID_SOCKET)
{
sockaddr_in sin;
sin.sin_family=PF_INET;
sin.sin_port=htons(14567);
sin.sin_addr.s_addr=INADDR_ANY;
if((net=bind(server,(LPSOCKADDR)&sin,sizeof(sin)))!=SOCKET_ERROR)
{
if((net=listen(server,MAX_CLIENTS))!=SOCKET_ERROR)
{
client_count++;
cout<<"client found\n";
if(client_count<=MAX_CLIENTS)
{
if((client=accept(server,NULL,NULL))!=SOCKET_ERROR)
{
cout<<client_count<<'\n';
do
{
cout<<"enter message: ";
cin.get(data,49);
cin.ignore(80,'\n');
if((net=send(server,data,sizeof(data),NULL))!=SOCKET_ERROR || (net=recv(client,rdata,49,NULL))!=SOCKET_ERROR)
{
if(strlen(rdata)==NULL)
{
cout<<" ";
}
else
{
cout<<rdata<<'\n';
}
}
}while(client_count!>MAX_CLIENTS);
}
else
{
cout<<"failed accept\n";
WSACleanup();
closesocket(server);
closesocket(client);
}
}
else
{
cout<<"server cant handle anymore clients";
WSACleanup();
closesocket(server);
closesocket(client);
}
}
else
{
client_count--;
cout<<"failed listen\n";
WSACleanup();
closesocket(server);
closesocket(client);
}
}
else
{
cout<<"failed bind\n";
WSACleanup();
closesocket(server);
closesocket(client);
}
}
else
{
cout<<"invalid socket\n";
WSACleanup();
closesocket(server);
closesocket(client);
}
return(client_count);
}
and here's the client:
#include<winsock.h>
#include<iostream.h>
#include<string.h>
#include<conio.h>
#include<fstream.h>
#pragma comment(lib,"wsock32.lib")
int net;
char data[50];
char rdata[50];
ofstream outfile;
SOCKET server;
SOCKET client;
int main()
{
WORD sockversion;
WSADATA wsaData;
sockversion=MAKEWORD(1,1);
WSAStartup(sockversion,&wsaData);
if((client=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP))!=INVALID_SOCKET)
{
sockaddr_in sin;
sin.sin_family=PF_INET;
sin.sin_port=htons(14567);
sin.sin_addr.s_addr=inet_addr("127.0.0.1");
sockaddr_in from;
int fromlen=sizeof(from);
if((net=connect(client,(LPSOCKADDR)&sin,sizeof(sin)))!=SOCKET_ERROR)
{
cout<<"<connected to "<<inet_ntoa(from.sin_addr)<<">"<<'\n';
cout<<"<on port "<<"8888"<<">"<<'\n';
do
{
cout<<"enter a message ";
cin.get(data,49);
cin.ignore(80,'\n');
cout<<rdata<<'\n';
if((net=send(client,data,sizeof(data),NULL))!=SOCKET_ERROR || (net=recv(server,rdata,49,NULL))!=SOCKET_ERROR)
{
if(strlen(rdata)==NULL)
{
cout<<" ";
}
else
{
cout<<rdata<<'\n';
}
}
}while(!NULL);
}
else
{
cout<<"failed to connect to server\n";
WSACleanup();
closesocket(client);
closesocket(server);
}
}
else
{
cout<<"invalid socket\n";
WSACleanup();
closesocket(client);
closesocket(server);
}
} |