Question

I have a socket() function call in my code.(using C language):
socket(AF_INET, SOCK_STREAM, 0))
I want that it should result in error.(INVALID_SOCKET)
Do we have some way out so that above function call results in error.
Like stopping some services,etc

Answer 1

Since you say this is in your code, you could define your own implementation of socket that always returns INVALID_SOCKET:

int socket(int domain, int type, int protocol)
{
    return INVALID_SOCKET;
}

If you link with the object file that defines your version of socket before linking with the real version, the linker will send all calls to socket to your implementation.