Ejemplos de netlink_broadcast_deliver en C++ (Cpp)

Ejemplo n.º 1

int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 pid,
		      u32 group, int allocation)
{
	struct sock *sk;
	struct sk_buff *skb2 = NULL;
	int protocol = ssk->protocol;
	int failure = 0, delivered = 0;

	/* While we sleep in clone, do not allow to change socket list */

	netlink_lock_table();

	for (sk = nl_table[protocol]; sk; sk = sk->next) {
		if (ssk == sk)
			continue;

		if (sk->protinfo.af_netlink->pid == pid ||
		    !(sk->protinfo.af_netlink->groups&group))
			continue;

		if (failure) {
			netlink_overrun(sk);
			continue;
		}

		sock_hold(sk);
		if (skb2 == NULL) {
			if (atomic_read(&skb->users) != 1) {
				skb2 = skb_clone(skb, allocation);
			} else {
				skb2 = skb;
				atomic_inc(&skb->users);
			}
		}
		if (skb2 == NULL) {
			netlink_overrun(sk);
			/* Clone failed. Notify ALL listeners. */
			failure = 1;
		} else if (netlink_broadcast_deliver(sk, skb2)) {
			netlink_overrun(sk);
		} else {
			delivered = 1;
			skb2 = NULL;
		}
		sock_put(sk);
	}

	netlink_unlock_table();

	if (skb2)
		kfree_skb(skb2);
	kfree_skb(skb);

	if (delivered)
		return 0;
	if (failure)
		return -ENOBUFS;
	return -ESRCH;
}

Ejemplo n.º 2

static inline int do_one_broadcast(struct sock *sk,
				   struct netlink_broadcast_data *p)
{
	struct netlink_opt *nlk = nlk_sk(sk);
	int val;

	if (p->exclude_sk == sk)
		goto out;

	if (nlk->pid == p->pid || !(nlk->groups & p->group))
		goto out;

	if (p->failure) {
		netlink_overrun(sk);
		goto out;
	}

	sock_hold(sk);
	if (p->skb2 == NULL) {
		if (atomic_read(&p->skb->users) != 1) {
			p->skb2 = skb_clone(p->skb, p->allocation);
		} else {
			p->skb2 = p->skb;
			atomic_inc(&p->skb->users);
		}
	}
	if (p->skb2 == NULL) {
		netlink_overrun(sk);
		/* Clone failed. Notify ALL listeners. */
		p->failure = 1;
	} else if ((val = netlink_broadcast_deliver(sk, p->skb2)) < 0) {
		netlink_overrun(sk);
	} else {
		p->congested |= val;
		p->delivered = 1;
		p->skb2 = NULL;
	}
	sock_put(sk);

out:
	return 0;
}