Yes I know the name of the BBS so please don't mention it :). I need to set a Windows socket to Non-Blocking and my attempts at searching have obviously failed. Sooner the better I hate to mention it but this project is due tomorrow and i believe the only true error in it is that it is blocking.
Or atleast help me with this. Problems arise at run time in both the server and client. First off in the Client the names are sent fine and recieved but the prompt for the user to begin typing does not appear until the server sends something to it. Then after something is sent to it (it displays it fine) the clients stops. It does not display the prompt again and will not accept input which leads me to believe that it is blocking somewhere and I thought that I fixed that with the ioctlsocket(). In the server you can send information to the client but after that first send it stops in the same fashion as the client. Here is the full source:
#include <winsock.h>
#include <string.h>
#include <iostream.h>
#include "tal0n.h"
#define PORT 5050
#define MAX 256
int main()
{
WSADATA info;
int status = 0;
Winsock Programmer's FAQ: Information for New Winsockers::
Sep 22, 2008 2.9 - How can I test my Winsock application without setting up a network? . All of the non-blocking socket methods lend themselves to
http://tangentsoft.net/wskfaq/newbie.htmlHOME |
Networking [Archive] - UNIX Socket FAQ::
Setting to Local IP · Connect()'ing with a non-blocking socket · probs in ending a timeouts in recv/send · Setting up a Non-Blocking Socket (Windows)
http://www.developerweb.net/forum/archive/index.php/f-62.htmlHOME |
u_long NonBlock = 1;
int Wait = -1;
int nbytes = 1;
tal0n chat;
if ( WSAStartup(MAKEWORD(1, 1), &info) != 0 )
{
cerr << "Error in WSAStartup." << endl;
return 0;
}
while ( status != 3 )
{
int choice = chat.Display();
switch ( choice )
{
case 1: // Server
{
fd_set readfds, master;
int control = 0, len;
int sockfd, newfd = -1, curfd, fdmax;
char ReC[MAX], MsG[MAX], Name[20], Them[MAX];
struct sockaddr_in client;
FD_ZERO( &master );
FD_ZERO( &readfds );
sockfd = chat.ServerSet( PORT );
FD_SET( sockfd, &master );
fdmax = sockfd;
cout << "Running..." << endl;
if ( ioctlsocket( sockfd, FIONBIO, &NonBlock ) == SOCKET_ERROR )
{
cout << WSAGetLastError() << endl;
return 0;
}
while ( 1 )
{
readfds = master;
if ( select( fdmax+1, &readfds, NULL, NULL, NULL ) <= 0 )
{
cerr << "Error in Call to Select()" << endl;
closesocket( sockfd );
return 0;
}
for ( int i=0; i <= fdmax; i++ )
{
if ( FD_ISSET( i, &master ) )
{
if ( i == sockfd )
{
if ( control == 0 )
{
cout << "newuser" << endl;
int sin_size = sizeof(struct sockaddr);
if ( (newfd = accept( sockfd, (struct sockaddr *)&client, &sin_size)) == -1 )
{
cout << "Error in accept" << endl;
return 0;
}
else
{
if ( ioctlsocket( newfd, FIONBIO, &NonBlock ) == SOCKET_ERROR )
{
cout << WSAGetLastError() << endl;
return 0;
}
cout << "Waiting for Screen Name." << endl;
while( Wait == -1 )
{
if ( (Wait = recv(newfd, Them, MAX, 0)) > 7775-8407::
Setting up proper name 7884 [cremes.devli] Adding "allow ::1" also makes this . Windows XP SP2 socket issues 7945 [dan.hatfield] I'm trying to determine
http://blade.nagaokaut.ac.jp/ruby/ruby-core/thr7775-8407.htmlHOME |
comp.sys.hp.hpux::
Re: PCNFS & WINDOWS SERVICES FOR UNIX, Kevin Collins Re: Nonblocking socket, Rick Jones; Re: Nonblocking socket, Henrik Goldman; Re: Nonblocking socket,
http://unix.derkeiler.com/Newsgroups/comp.sys.hp.hpux/2006-06/HOME |
0 )
break;
}
Wait = -1;
cout << "You are talking with " << Them << endl;
cout << "Enter you screen name for today's conversation: ";
cin >> Name;
cout << "Sending your name." << endl;
QSocketDevice Class::
bind() is used by servers for setting up incoming connections. you use a QSocketNotifier on Windows, the socket is immediately made nonblocking.
http://doc.trolltech.com/qtopia2.2/html/qsocketdevice.htmlHOME |
Allegra » Blog Archive » TCP Stack Flaking Out::
Aug 18, 2006 But when using a non-blocking socket, overflowing the TCP stack will raise the following exception on Windows:
http://laurentszyster.be/blog/tcp-stack-flaking-out/HOME |
if ( send( newfd, Name, strlen(Name), 0 ) == -1 )
{
cerr << "Error in Send" << endl;
return 0;
}
cout << "Name sent." << endl;
}
curfd = newfd;
}
control++;
}
else if( i == newfd )
{
cout << "person talking2" << endl;
if ( (nbytes = recv( i, ReC, MAX, 0 )) <= 0 )
{
cerr << "The Client has disconnected." << endl;
return 0;
}
else if ( nbytes > 0 )
{
strcat( Them, ": " );
strcat( Them, ReC );
for ( int i = 0; (unsigned)i < strlen(Them); i++ )
cout << Them[i];
cout << endl;
}
}
}
}
cout << "] ";
cin.ignore( 80, 'n' );
cin.getline( MsG, MAX, 'n' );
len = strlen( MsG );
if ( len > MAX )
cout << "Your entered message is too long." <<endl;
else
{
if ( chat.quitme( MsG ) == 1 )
{
if ( send( curfd, MsG, len, 0 ) == -1 )
{
cerr << "Error in SenD (Bad)." << endl;
closesocket(newfd);
return 0;
}
cout << "You have quit" << endl;
}
else
{
if ( send( curfd, MsG, len, 0) == -1 )
{
cerr << "Error in SenD (Good)." << endl;
closesocket(newfd);
return 0;
}
cout << "Good" << endl;
}
}
}
break;
}
case 2: // Client
{
fd_set readfds, master;
char RemoteIP[20];
int sockfd, fdmax;
char RecV[MAX], MyName[20], HisName[MAX], BuF[MAX];
FD_ZERO( &master );
FD_ZERO( &readfds );
cout << "Enter the IP to connect to: ";
cin >> RemoteIP;
sockfd = chat.ClientSet( RemoteIP, PORT );
if ( ioctlsocket( sockfd, FIONBIO, &NonBlock ) == SOCKET_ERROR )
{
cout << WSAGetLastError() << endl;
return 0;
}
FD_SET( sockfd, &master );
fdmax = sockfd;
cout << "Enter your desired screen name: ";
cin >> MyName;
cout << "Sending Screen Name." << endl;
if( send( sockfd, MyName, strlen(MyName), 0) == 0 )
{
cerr << "Error in Send." << endl;
closesocket(sockfd);
return 0;
}
cout << "Screen Name sent." << endl;
cout << "Retrieving Screen Name." << endl;
while( Wait == -1 )
{
if ( (Wait = recv(sockfd, HisName, MAX, 0)) > 0 )
break;
}
Wait = -1;
cout << "You are now talking with " << HisName << endl;
while( 1 )
{
readfds = master;
if ( select( fdmax+1, &readfds, NULL, NULL, NULL ) <= 0 )
{
cerr << "Error in Call to Select()" << endl;
closesocket( sockfd );
return 0;
}
if ( FD_ISSET( sockfd, &readfds ) )
{
if ( (nbytes = recv( sockfd, RecV, MAX, 0)) <= 0 )
{
cerr << "The server has disconnected." << endl;
closesocket( sockfd );
return 0;
}
else if ( nbytes > 0 )
{
strcat( HisName, ": " );
strcat( HisName, RecV );
for( int i = 0; (unsigned)i < strlen(HisName); i++ )
cout << HisName[i];
cout << endl;
}
}
int MsgLen;
cout << "] ";
cin.ignore( 80, 'n' );
cin.getline( BuF, MAX, 'n' );
MsgLen = strlen( BuF );
if ( MsgLen > MAX )
cout << "You entered to big of a message." << endl;
else
{
if ( chat.quitme( BuF ) == 1 )
{
if ( send( sockfd, BuF, MsgLen, 0 ) == -1 )
{
cerr << "Error in SenD." << endl;
closesocket(sockfd);
return 0;
}
cout << "You have quited" << endl;
}
else
{
if ( send( sockfd, BuF, MsgLen, 0) == -1 )
{
cerr << "Error in SenD." << endl;
closesocket(sockfd);
return 0;
}
cout << "Good" << endl;
}
}
}
break;
}
case 3:
{
cout << "Goodbye" << endl;
break;
}
default:
cerr << "Invalid choice. Please try again." << endl;
break;
}
status = choice;
}
}
This is different than the one that I have been working on in the fact that is is peer-to-peer instead of many clients. Help is GREATLY appreciated at this point.
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|
Setting up a Non-Blocking Socket (Windows)