WSAGetLastError() returns 10022

Hi.

I just started learning networking and I managed to make this code:

Code:

---

#include <winsock.h>
#include <iostream>
using namespace std;

int RequestedVersion = 2;

void DoStuff()
{
    SOCKET hSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (hSocket == INVALID_SOCKET) { cout << "Unable to create a socket" << endl; return; }
   
    sockaddr_in sockAddr;

    sockAddr.sin_family = AF_INET;
    sockAddr.sin_port = htons(80);
    sockAddr.sin_addr.S_un.S_addr = inet_addr("72.14.221.104");

    // Connect to the server
    if (connect(hSocket, (sockaddr*)(&sockAddr), sizeof(sockAddr))!=0)
    {
        // error handling code 
                cout << "Connection failed!" << endl;
    }
    else { cout << "Socket is connected" << endl; }
   
    if (bind(hSocket, (sockaddr*)(&sockAddr), sizeof(sockAddr))!=0)
    {
        cout << "Binding failed (" << WSAGetLastError() << ")" << endl;
    }
   
}


int main()
{
    WSADATA wsadata;
    if (WSAStartup(MAKEWORD(RequestedVersion, 0), &wsadata) == 0)
    {
        cout << "Startup was successful!" << endl;
        if (RequestedVersion >= wsadata.wVersion)
        {
            cout << "Version " << wsadata.wVersion << endl;
        }
       
        DoStuff();
       
        system("pause");
        if (WSACleanup())
        {
            cout << "Cleanup failed!" << endl;
        }
    }
    else
    {
        cout << "Startup failed!" << endl;
    }
}

---

it gives the following output when run:
Startup was successful!
Version 2
Socket is connected
Binding failed (10022)
Press any key to continue . . .

So I can't figure out what's wrong. Please help or direct me. Thank you!

Why are you binding the socket after connecting?

Anyway, look at bind: the second parameter is the local address for the socket. If 72.14.221.104 is not a local IP assigned to your computer, it's definitely going to fail.

Interesting. I thought binding was needed to associate the connection with the socket.
But now i don't get it. What is binding meant for afterall? And what is a "local IP assigned to my computer"?

In short, binding is for servers. Or if you want a specific outgoing port, but you only want that in extremely rare special circumstances, and you have to do it before calling connect().

A local IP ... well, each computer can have more than one IP. You usually have two: the local loopback 127.0.0.1, and whatever your internet/ethernet IP is. Some computers have more: my server/router has 4: one external, two on the ethernet, and the loopack.
A local IP is one that is assigned to the computer the program is running on and not some other computer somewhere in the world.

I tried to create a program for connecting to an internet server and that's it.
I understood, that first I need to make a socket by using a function called socket() and i have to pass the parameters to define the type of the connection (socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);).

Then I make an object of sockaddr_in and fill in the necessary variables with the data about "which server do i want to connect to and which port of the server to use".

then i have to use the function connect() to actually request a connection with the server.

I managed to do that part. But then I saw a function called bind() and it was said that it is used for associating a connection with a socket - i thought it was necessary before sending and receiveing data, but then it started bugging me with errors.

So I don't have to use bind() afterall?
Maybe you could recommend a good tutorial(not the ones that are in the sticky posts).

No, you don't need bind(). And I don't know any good tutorials. I'm not an expert in network programming, not even remotely - the answer to this question just about exhausted my knowledge, and I had to look up some stuff in the manpages.

Ok. Thank you for helping me. I think I can move on in the tutorial now.