Programming Forums > Application Development > C++

d_heyzie · Jul 8th, 2006, 10:05 AM

hi, im trying to learn how to use winsock in C++ programs so ive tried to make a small client/server thing where the client sends a message and the server responds. My problem is that, although they are connecting, and i think they are probably recieving the messages, i cant get the recieved message to be displayed on the console window.

(Toggle Plain Text)

 send(sockfd, *ping, 4, 0);
    
    if(errno == -1)
    {
             cout <<"Send failed!" << endl;
    }
    else
    cout <<"Client> " << *ping << endl;
    
    recv(sockfd, *buf, 256, 0);
    
    if(errno == -1)
    {
             cout <<"Recv failed!" << endl;
    }
    else
    cout <<"Server> " << *buf << endl;

(Section of Client code where i believe the problem lies)

(Toggle Plain Text)

   recv(new_sockfd, *buf, 256, 0);
    if(errno == -1)
    {
             cout <<"failed to recieve" << endl;
    }
    else
    cout <<"Client> " << *buf << endl;
    
    
    send(new_sockfd, *pong, 4, 0);
    if(errno == -1)
    {
             cout <<"Failed to send msg!" << endl;
    }
    else
    cout <<"Server> " << *pong << endl;

(Section of Server code where i believe the problem lies)

Client OUTPUT:
Client> ping
Server> (some wierd stuff that im not gonna bother to write)

Server OUTPUT:
Client> (blank)
Server> pong

HAYELLP!!!

Cache · Jul 8th, 2006, 10:55 AM

You should show how 'ping', 'pong', and 'buf' are declared. The dereferencing you're doing doesn't look right, but it depends on what 'buf' ect is to say what is right.

d_heyzie · Jul 8th, 2006, 7:36 PM

yeah, long after i posted i thought i shoulda probably done that, but i fixed it anyway. I had to change the type i was using from char* to char. I still have a little odd output but i should be able to fix that. ty

Jul 8th, 2006, 10:05 AM	#1
d_heyzie Newbie Join Date: Jan 2006 Posts: 22 Rep Power: 0	help with displaying message hi, im trying to learn how to use winsock in C++ programs so ive tried to make a small client/server thing where the client sends a message and the server responds. My problem is that, although they are connecting, and i think they are probably recieving the messages, i cant get the recieved message to be displayed on the console window. (Toggle Plain Text) send(sockfd, ping, 4, 0); if(errno == -1) { cout <<"Send failed!" << endl; } else cout <<"Client> " << ping << endl; recv(sockfd, buf, 256, 0); if(errno == -1) { cout <<"Recv failed!" << endl; } else cout <<"Server> " << buf << endl; send(sockfd, ping, 4, 0); if(errno == -1) { cout <<"Send failed!" << endl; } else cout <<"Client> " << ping << endl; recv(sockfd, buf, 256, 0); if(errno == -1) { cout <<"Recv failed!" << endl; } else cout <<"Server> " << buf << endl; (Section of Client code where i believe the problem lies) (Toggle Plain Text) recv(new_sockfd, buf, 256, 0); if(errno == -1) { cout <<"failed to recieve" << endl; } else cout <<"Client> " << buf << endl; send(new_sockfd, pong, 4, 0); if(errno == -1) { cout <<"Failed to send msg!" << endl; } else cout <<"Server> " << pong << endl; recv(new_sockfd, buf, 256, 0); if(errno == -1) { cout <<"failed to recieve" << endl; } else cout <<"Client> " << buf << endl; send(new_sockfd, pong, 4, 0); if(errno == -1) { cout <<"Failed to send msg!" << endl; } else cout <<"Server> " << pong << endl; (Section of Server code where i believe the problem lies) Client OUTPUT: Client> ping Server> (some wierd stuff that im not gonna bother to write) Server OUTPUT: Client> (blank) Server> pong HAYELLP!!!

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Jul 8th, 2006, 10:55 AM	#2
Cache Hobbyist Join Date: Sep 2005 Posts: 261 Rep Power: 4	You should show how 'ping', 'pong', and 'buf' are declared. The dereferencing you're doing doesn't look right, but it depends on what 'buf' ect is to say what is right.

Jul 8th, 2006, 7:36 PM	#3
d_heyzie Newbie Join Date: Jan 2006 Posts: 22 Rep Power: 0	yeah, long after i posted i thought i shoulda probably done that, but i fixed it anyway. I had to change the type i was using from char* to char. I still have a little odd output but i should be able to fix that. ty

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Programming Forums > Application Development > C++

help with displaying message