In funciton:
static int tcp_v4_init_sock(struct sock *sk)
{
struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
...
}
Why can struct sock convert to struct tcp_sock?
Yes,
static struct sock *sk_prot_alloc(struct proto *prot, gfp_t priority,
int family)
{
struct sock *sk;
sk = kmalloc(prot->obj_size, priority);
...
}
Although inn the function above, prot->obj_size equals to sizeof(struct
tcp_sock), I still can not understand this type conversion.
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