code10.c

struct sock *inet_csk_accept(struct sock *sk)
{
    struct sock *newsk = NULL;   /* client socket */

    /* Make sure that this socket is listening, and that it has something pending. */
    lock_sock(sk);
    if (sk->sk_state == TCP_LISTEN)
        if ("there are completed connections waiting to be accepted")
            newsk = get_first_connection(sk);
    release_sock(sk);
    return newsk;
}