Help with pointer syntax

I am trying to understand some socket code. One of the function calls is as follows:

Code:

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msgsock = accept(sock, (struct sockaddr *)0, (int *)0);

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Just wondering what the syntax for the last two arguments means and how it works.

Thanks in advance.

In this example, you are saying accept a connection on sock and you are not collecting any information about who that is (since the destination address for the last two arguments is 0). It might be a better practice to just use NULL here, if accept() will accept that.

The reason you might need to cast zero would be that accept() expects a pointer of some specific sort.

both are NULL pointers cast to the proper type