Esempi in C++ (Cpp) per ND_NLMSG_DATA

Esempio n. 1

File: netlink_k.c Progetto: AllenWeb/linux

static void netlink_rcv_cb(struct sk_buff *skb)
{
	struct nlmsghdr *nlh;
	struct net_device *dev;
	u32 mlen;
	void *msg;
	int ifindex;

	if (skb->len >= NLMSG_SPACE(0)) {
		nlh = (struct nlmsghdr *)skb->data;

		if (skb->len < nlh->nlmsg_len ||
		nlh->nlmsg_len > ND_MAX_MSG_LEN) {
			printk(KERN_ERR "Invalid length (%d,%d)\n", skb->len,
				nlh->nlmsg_len);
			return;
		}

		memcpy(&ifindex, ND_NLMSG_IFIDX(nlh), ND_IFINDEX_LEN);
		msg = ND_NLMSG_DATA(nlh);
		mlen = ND_NLMSG_R_LEN(nlh);

		if (rcv_cb) {
			dev = dev_get_by_index(&init_net, ifindex);
			if (dev) {
				rcv_cb(dev, nlh->nlmsg_type, msg, mlen);
				dev_put(dev);
			} else
				printk(KERN_ERR "dev_get_by_index(%d) "
					"is not found.\n", ifindex);
		} else
			printk(KERN_ERR "Unregistered Callback\n");
	}
}

Esempio n. 2

File: netlink_k.c Progetto: Chong-Li/cse522

static void netlink_rcv_cb(struct sk_buff *skb)
{
	struct nlmsghdr	*nlh;
	struct net_device *dev;
	u32 mlen;
	void *msg;
	int ifindex;

	if (!rcv_cb) {
		pr_err("nl cb - unregistered\n");
		return;
	}

	if (skb->len < NLMSG_HDRLEN) {
		pr_err("nl cb - invalid skb length\n");
		return;
	}

	nlh = (struct nlmsghdr *)skb->data;

	if (skb->len < nlh->nlmsg_len || nlh->nlmsg_len > ND_MAX_MSG_LEN) {
		pr_err("nl cb - invalid length (%d,%d)\n",
		       skb->len, nlh->nlmsg_len);
		return;
	}

	memcpy(&ifindex, ND_NLMSG_IFIDX(nlh), ND_IFINDEX_LEN);
	msg = ND_NLMSG_DATA(nlh);
	mlen = ND_NLMSG_R_LEN(nlh);

	dev = dev_get_by_index(&init_net, ifindex);
	if (dev) {
		rcv_cb(dev, nlh->nlmsg_type, msg, mlen);
		dev_put(dev);
	} else {
		pr_err("nl cb - dev (%d) not found\n", ifindex);
	}
}