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Simple Winsock Question?

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Join Date: Dec 2008

Posts: 117

Reputation: u8sand is on a distinguished road

Solved Threads: 15

u8sand

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Junior Poster

Simple Winsock Question?

Jan 10th, 2009

Hello everyone. Im sure this is a simple winsock question but maybe im wrong...
I searched everywhere and keep hitting dead ends.
Im just learning how to use winsock and still have yet to find a good tutorial. But i found a class which i will start with. Only problem is...
When i try to recv(...); the program waits until it receives somthing. Is there a way to do like:

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char msg[256];
bool quit = false;
while(!quit)
{
    if(recv(msg)) // as it goes through the loop, if it received somthing
        cout << "User: " << msg << endl; // display it
    if(GetKeyState(VK_RETURN)<0) // when you type enter
    {
        cout << "Message: "; // prompt for your message
        cin.getline(msg,256); // input your message
        send(msg); // send it
    }
    if(GetKeyState(VK_ESCAPE)<0)
        quit = true;
}
char msg[256];
bool quit = false;
while(!quit)
{
    if(recv(msg)) // as it goes through the loop, if it received somthing
        cout << "User: " << msg << endl; // display it
    if(GetKeyState(VK_RETURN)<0) // when you type enter
    {
        cout << "Message: "; // prompt for your message
        cin.getline(msg,256); // input your message
        send(msg); // send it
    }
    if(GetKeyState(VK_ESCAPE)<0)
        quit = true;
}

And if you know of a good winsock tutorial that starts from the very basics, doesent do like the windows ones and most of them and just gives u what you put. I wana actualy understand what im doing : /

Thanks!

BTW: i know this code would never work and/or come up w/ errors, its just a general idea of what i would like to do.

Last edited by u8sand; Jan 10th, 2009 at 10:45 pm.

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Join Date: Dec 2004

Posts: 2,413

Reputation: Comatose is a jewel in the rough

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Comatose

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Taboo Programmer

Re: Simple Winsock Question?

Jan 10th, 2009

You can use ioctl on the socket with FIONBIO. Should make the socket "non-blocking" which allows it to basically continue if there is nothing on the socket. Alternative, use threads, with function pointers (or functors), and let the socket block

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Join Date: Dec 2008

Posts: 117

Reputation: u8sand is on a distinguished road

Solved Threads: 15

u8sand

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Junior Poster

Re: Simple Winsock Question?

Jan 10th, 2009

Im sorry. What is ioctl or FIONBIO? and in what way would i use function pointers?
Sorry, im new to winsock programing.

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Join Date: Dec 2004

Posts: 2,413

Reputation: Comatose is a jewel in the rough

Solved Threads: 211

Comatose

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Taboo Programmer

Re: Simple Winsock Question?

Jan 10th, 2009

ioctl is a function to alter the way input/output is controlled/handled/works. http://msdn.microsoft.com/en-us/libr...50(VS.85).aspx is a helpful site about using ioctl with winsock. One of the constants that you pass to ioctl, in order to stop the socket from blocking (blocking means waits for input) is FIONBIO.
The alternative measure is a messy way to do things, and mostly was put there jokingly. While threads and function pointers can be a great asset (when designed very carefully), they usually lead to more trouble than they end up being worth.