75 static bool check_6rd(struct ip_tunnel *tunnel, const struct in6_addr *v6dst,
469 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_tunnel_uninit()  local
470 	struct sit_net *sitn = net_generic(tunnel->net, sit_net_id);  in ipip6_tunnel_uninit()
475 		ipip6_tunnel_unlink(sitn, tunnel);  in ipip6_tunnel_uninit()
476 		ipip6_tunnel_del_prl(tunnel, NULL);  in ipip6_tunnel_uninit()
478 	ip_tunnel_dst_reset_all(tunnel);  in ipip6_tunnel_uninit()
593 static inline bool is_spoofed_6rd(struct ip_tunnel *tunnel, const __be32 v4addr,  in is_spoofed_6rd()  argument
597 	if (check_6rd(tunnel, v6addr, &v4embed) && v4addr != v4embed)  in is_spoofed_6rd()
614 static bool only_dnatted(const struct ip_tunnel *tunnel,  in only_dnatted()  argument
620 	prefix_len = tunnel->ip6rd.prefixlen + 32  in only_dnatted()
621 		- tunnel->ip6rd.relay_prefixlen;  in only_dnatted()
625 	return ipv6_chk_custom_prefix(v6dst, prefix_len, tunnel->dev);  in only_dnatted()
631 			      struct ip_tunnel *tunnel)  in packet_is_spoofed()  argument
635 	if (tunnel->dev->priv_flags & IFF_ISATAP) {  in packet_is_spoofed()
636 		if (!isatap_chksrc(skb, iph, tunnel))  in packet_is_spoofed()
642 	if (tunnel->dev->flags & IFF_POINTOPOINT)  in packet_is_spoofed()
647 	if (unlikely(is_spoofed_6rd(tunnel, iph->saddr, &ipv6h->saddr))) {  in packet_is_spoofed()
654 	if (likely(!is_spoofed_6rd(tunnel, iph->daddr, &ipv6h->daddr)))  in packet_is_spoofed()
657 	if (only_dnatted(tunnel, &ipv6h->daddr))  in packet_is_spoofed()
669 	struct ip_tunnel *tunnel;  in ipip6_rcv()  local
672 	tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev,  in ipip6_rcv()
674 	if (tunnel) {  in ipip6_rcv()
677 		if (tunnel->parms.iph.protocol != IPPROTO_IPV6 &&  in ipip6_rcv()
678 		    tunnel->parms.iph.protocol != 0)  in ipip6_rcv()
686 		if (packet_is_spoofed(skb, iph, tunnel)) {  in ipip6_rcv()
687 			tunnel->dev->stats.rx_errors++;  in ipip6_rcv()
691 		__skb_tunnel_rx(skb, tunnel->dev, tunnel->net);  in ipip6_rcv()
699 				++tunnel->dev->stats.rx_frame_errors;  in ipip6_rcv()
700 				++tunnel->dev->stats.rx_errors;  in ipip6_rcv()
705 		tstats = this_cpu_ptr(tunnel->dev->tstats);  in ipip6_rcv()
731 	struct ip_tunnel *tunnel;  in ipip_rcv()  local
734 	tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev,  in ipip_rcv()
736 	if (tunnel) {  in ipip_rcv()
737 		if (tunnel->parms.iph.protocol != IPPROTO_IPIP &&  in ipip_rcv()
738 		    tunnel->parms.iph.protocol != 0)  in ipip_rcv()
745 		return ip_tunnel_rcv(tunnel, skb, &tpi, log_ecn_error);  in ipip_rcv()
759 static bool check_6rd(struct ip_tunnel *tunnel, const struct in6_addr *v6dst,  in check_6rd()  argument
763 	if (ipv6_prefix_equal(v6dst, &tunnel->ip6rd.prefix,  in check_6rd()
764 			      tunnel->ip6rd.prefixlen)) {  in check_6rd()
769 		pbw0 = tunnel->ip6rd.prefixlen >> 5;  in check_6rd()
770 		pbi0 = tunnel->ip6rd.prefixlen & 0x1f;  in check_6rd()
773 		    tunnel->ip6rd.relay_prefixlen;  in check_6rd()
775 		pbi1 = pbi0 - tunnel->ip6rd.relay_prefixlen;  in check_6rd()
780 		*v4dst = tunnel->ip6rd.relay_prefix | htonl(d);  in check_6rd()
793 static inline __be32 try_6rd(struct ip_tunnel *tunnel,  in try_6rd()  argument
797 	check_6rd(tunnel, v6dst, &dst);  in try_6rd()
809 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_tunnel_xmit()  local
810 	const struct iphdr  *tiph = &tunnel->parms.iph;  in ipip6_tunnel_xmit()
812 	u8     tos = tunnel->parms.iph.tos;  in ipip6_tunnel_xmit()
825 	int t_hlen = tunnel->hlen + sizeof(struct iphdr);  in ipip6_tunnel_xmit()
861 		dst = try_6rd(tunnel, &iph6->daddr);  in ipip6_tunnel_xmit()
893 	rt = ip_route_output_ports(tunnel->net, &fl4, NULL,  in ipip6_tunnel_xmit()
897 				   tunnel->parms.link);  in ipip6_tunnel_xmit()
935 		if (tunnel->parms.iph.daddr && skb_dst(skb))  in ipip6_tunnel_xmit()
945 	if (tunnel->err_count > 0) {  in ipip6_tunnel_xmit()
947 				tunnel->err_time + IPTUNNEL_ERR_TIMEO)) {  in ipip6_tunnel_xmit()
948 			tunnel->err_count--;  in ipip6_tunnel_xmit()
951 			tunnel->err_count = 0;  in ipip6_tunnel_xmit()
979 	if (ip_tunnel_encap(skb, tunnel, &protocol, &fl4) < 0) {  in ipip6_tunnel_xmit()
988 			    !net_eq(tunnel->net, dev_net(dev)));  in ipip6_tunnel_xmit()
1003 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip_tunnel_xmit()  local
1004 	const struct iphdr  *tiph = &tunnel->parms.iph;  in ipip_tunnel_xmit()
1045 	struct ip_tunnel *tunnel;  in ipip6_tunnel_bind_dev()  local
1049 	tunnel = netdev_priv(dev);  in ipip6_tunnel_bind_dev()
1050 	iph = &tunnel->parms.iph;  in ipip6_tunnel_bind_dev()
1053 		struct rtable *rt = ip_route_output_ports(tunnel->net, &fl4,  in ipip6_tunnel_bind_dev()
1059 							  tunnel->parms.link);  in ipip6_tunnel_bind_dev()
1068 	if (!tdev && tunnel->parms.link)  in ipip6_tunnel_bind_dev()
1069 		tdev = __dev_get_by_index(tunnel->net, tunnel->parms.link);  in ipip6_tunnel_bind_dev()
1072 		int t_hlen = tunnel->hlen + sizeof(struct iphdr);  in ipip6_tunnel_bind_dev()
1322 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_tunnel_change_mtu()  local
1323 	int t_hlen = tunnel->hlen + sizeof(struct iphdr);  in ipip6_tunnel_change_mtu()
1343 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_dev_free()  local
1345 	free_percpu(tunnel->dst_cache);  in ipip6_dev_free()
1358 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_tunnel_setup()  local
1359 	int t_hlen = tunnel->hlen + sizeof(struct iphdr);  in ipip6_tunnel_setup()
1377 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_tunnel_init()  local
1379 	tunnel->dev = dev;  in ipip6_tunnel_init()
1380 	tunnel->net = dev_net(dev);  in ipip6_tunnel_init()
1381 	strcpy(tunnel->parms.name, dev->name);  in ipip6_tunnel_init()
1388 	tunnel->dst_cache = alloc_percpu(struct ip_tunnel_dst);  in ipip6_tunnel_init()
1389 	if (!tunnel->dst_cache) {  in ipip6_tunnel_init()
1399 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_fb_tunnel_init()  local
1400 	struct iphdr *iph = &tunnel->parms.iph;  in ipip6_fb_tunnel_init()
1410 	rcu_assign_pointer(sitn->tunnels_wc[0], tunnel);  in ipip6_fb_tunnel_init()
1666 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_fill_info()  local
1667 	struct ip_tunnel_parm *parm = &tunnel->parms;  in ipip6_fill_info()
1682 			     &tunnel->ip6rd.prefix) ||  in ipip6_fill_info()
1684 			    tunnel->ip6rd.relay_prefix) ||  in ipip6_fill_info()
1686 			tunnel->ip6rd.prefixlen) ||  in ipip6_fill_info()
1688 			tunnel->ip6rd.relay_prefixlen))  in ipip6_fill_info()
1693 			tunnel->encap.type) ||  in ipip6_fill_info()
1695 			tunnel->encap.sport) ||  in ipip6_fill_info()
1697 			tunnel->encap.dport) ||  in ipip6_fill_info()
1699 			tunnel->encap.flags))  in ipip6_fill_info()