C++ (Cpp) ovs_ip_tun_rx_dstの例

コード例 #1

ファイル: ip_gre.c プロジェクト: exuuwen/study

static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi)
{
	struct net *net = dev_net(skb->dev);
	struct metadata_dst tun_dst;
	struct ip_tunnel_net *itn;
	const struct iphdr *iph;
	struct ip_tunnel *tunnel;

	if (tpi->proto != htons(ETH_P_TEB))
		return PACKET_REJECT;

	itn = net_generic(net, gre_tap_net_id);

	iph = ip_hdr(skb);
	tunnel = rcu_dereference(itn->collect_md_tun);
	if (tunnel) {
		__be16 flags;
		__be64 tun_id;
		int err;


		skb_pop_mac_header(skb);
		flags = tpi->flags & (TUNNEL_CSUM | TUNNEL_KEY);
		tun_id = key_to_tunnel_id(tpi->key);
		ovs_ip_tun_rx_dst(&tun_dst, skb, flags, tun_id, 0);

		skb_reset_network_header(skb);
		err = IP_ECN_decapsulate(iph, skb);
		if (unlikely(err)) {
			if (err > 1) {
				++tunnel->dev->stats.rx_frame_errors;
				++tunnel->dev->stats.rx_errors;
				return PACKET_REJECT;
			}
		}

		ovs_ip_tunnel_rcv(tunnel->dev, skb, &tun_dst);
		return PACKET_RCVD;
	}
	return PACKET_REJECT;
}

コード例 #2

ファイル: ip_gre.c プロジェクト: openvswitch/ovs

static int __ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi,
		       struct ip_tunnel_net *itn, int hdr_len, bool raw_proto)
{
	struct metadata_dst tun_dst;
	const struct iphdr *iph;
	struct ip_tunnel *tunnel;

	iph = ip_hdr(skb);
	tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, tpi->flags,
				  iph->saddr, iph->daddr, tpi->key);

	if (tunnel) {
		if (__iptunnel_pull_header(skb, hdr_len, tpi->proto,
					   raw_proto, false) < 0)
			goto drop;

		if (tunnel->dev->type != ARPHRD_NONE)
			skb_pop_mac_header(skb);
		else
			skb_reset_mac_header(skb);
		if (tunnel->collect_md) {
			__be16 flags;
			__be64 tun_id;

			flags = tpi->flags & (TUNNEL_CSUM | TUNNEL_KEY);
			tun_id = key32_to_tunnel_id(tpi->key);
			ovs_ip_tun_rx_dst(&tun_dst, skb, flags, tun_id, 0);
		}

		ovs_ip_tunnel_rcv(tunnel->dev, skb, &tun_dst);
		return PACKET_RCVD;
	}
	return PACKET_NEXT;

drop:
	kfree_skb(skb);
	return PACKET_RCVD;
}