53 static int vti_input(struct sk_buff *skb, int nexthdr, __be32 spi,  in vti_input()  argument
57 	const struct iphdr *iph = ip_hdr(skb);  in vti_input()
58 	struct net *net = dev_net(skb->dev);  in vti_input()
61 	tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY,  in vti_input()
64 		if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))  in vti_input()
67 		XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = tunnel;  in vti_input()
69 		return xfrm_input(skb, nexthdr, spi, encap_type);  in vti_input()
74 	kfree_skb(skb);  in vti_input()
78 static int vti_rcv(struct sk_buff *skb)  in vti_rcv()  argument
80 	XFRM_SPI_SKB_CB(skb)->family = AF_INET;  in vti_rcv()
81 	XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);  in vti_rcv()
83 	return vti_input(skb, ip_hdr(skb)->protocol, 0, 0);  in vti_rcv()
86 static int vti_rcv_cb(struct sk_buff *skb, int err)  in vti_rcv_cb()  argument
92 	struct ip_tunnel *tunnel = XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4;  in vti_rcv_cb()
93 	u32 orig_mark = skb->mark;  in vti_rcv_cb()
108 	x = xfrm_input_state(skb);  in vti_rcv_cb()
111 	skb->mark = be32_to_cpu(tunnel->parms.i_key);  in vti_rcv_cb()
112 	ret = xfrm_policy_check(NULL, XFRM_POLICY_IN, skb, family);  in vti_rcv_cb()
113 	skb->mark = orig_mark;  in vti_rcv_cb()
118 	skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(skb->dev)));  in vti_rcv_cb()
119 	skb->dev = dev;  in vti_rcv_cb()
125 	tstats->rx_bytes += skb->len;  in vti_rcv_cb()
152 static netdev_tx_t vti_xmit(struct sk_buff *skb, struct net_device *dev,  in vti_xmit()  argument
157 	struct dst_entry *dst = skb_dst(skb);  in vti_xmit()
191 			dst_link_failure(skb);  in vti_xmit()
196 	skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(dev)));  in vti_xmit()
197 	skb_dst_set(skb, dst);  in vti_xmit()
198 	skb->dev = skb_dst(skb)->dev;  in vti_xmit()
200 	err = dst_output(skb);  in vti_xmit()
202 		err = skb->len;  in vti_xmit()
207 	dst_link_failure(skb);  in vti_xmit()
210 	kfree_skb(skb);  in vti_xmit()
217 static netdev_tx_t vti_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)  in vti_tunnel_xmit()  argument
224 	switch (skb->protocol) {  in vti_tunnel_xmit()
226 		xfrm_decode_session(skb, &fl, AF_INET);  in vti_tunnel_xmit()
227 		memset(IPCB(skb), 0, sizeof(*IPCB(skb)));  in vti_tunnel_xmit()
230 		xfrm_decode_session(skb, &fl, AF_INET6);  in vti_tunnel_xmit()
231 		memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));  in vti_tunnel_xmit()
235 		dev_kfree_skb(skb);  in vti_tunnel_xmit()
242 	return vti_xmit(skb, dev, &fl);  in vti_tunnel_xmit()
245 static int vti4_err(struct sk_buff *skb, u32 info)  in vti4_err()  argument
254 	struct net *net = dev_net(skb->dev);  in vti4_err()
255 	const struct iphdr *iph = (const struct iphdr *)skb->data;  in vti4_err()
259 	tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY,  in vti4_err()
268 		esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));  in vti4_err()
272 		ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));  in vti4_err()
276 		ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2));  in vti4_err()
283 	switch (icmp_hdr(skb)->type) {  in vti4_err()
285 		if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)  in vti4_err()
298 	if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH)  in vti4_err()
299 		ipv4_update_pmtu(skb, net, info, 0, 0, protocol, 0);  in vti4_err()
301 		ipv4_redirect(skb, net, 0, 0, protocol, 0);  in vti4_err()
506 static int vti_fill_info(struct sk_buff *skb, const struct net_device *dev)  in vti_fill_info()  argument
511 	nla_put_u32(skb, IFLA_VTI_LINK, p->link);  in vti_fill_info()
512 	nla_put_be32(skb, IFLA_VTI_IKEY, p->i_key);  in vti_fill_info()
513 	nla_put_be32(skb, IFLA_VTI_OKEY, p->o_key);  in vti_fill_info()
514 	nla_put_in_addr(skb, IFLA_VTI_LOCAL, p->iph.saddr);  in vti_fill_info()
515 	nla_put_in_addr(skb, IFLA_VTI_REMOTE, p->iph.daddr);  in vti_fill_info()