71 static bool check_6rd(struct ip_tunnel *tunnel, const struct in6_addr *v6dst,
473 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_tunnel_uninit()  local
474 	struct sit_net *sitn = net_generic(tunnel->net, sit_net_id);  in ipip6_tunnel_uninit()
479 		ipip6_tunnel_unlink(sitn, tunnel);  in ipip6_tunnel_uninit()
480 		ipip6_tunnel_del_prl(tunnel, NULL);  in ipip6_tunnel_uninit()
482 	dst_cache_reset(&tunnel->dst_cache);  in ipip6_tunnel_uninit()
564 static inline bool is_spoofed_6rd(struct ip_tunnel *tunnel, const __be32 v4addr,  in is_spoofed_6rd()  argument
568 	if (check_6rd(tunnel, v6addr, &v4embed) && v4addr != v4embed)  in is_spoofed_6rd()
585 static bool only_dnatted(const struct ip_tunnel *tunnel,  in only_dnatted()  argument
591 	prefix_len = tunnel->ip6rd.prefixlen + 32  in only_dnatted()
592 		- tunnel->ip6rd.relay_prefixlen;  in only_dnatted()
596 	return ipv6_chk_custom_prefix(v6dst, prefix_len, tunnel->dev);  in only_dnatted()
602 			      struct ip_tunnel *tunnel)  in packet_is_spoofed()  argument
606 	if (tunnel->dev->priv_flags & IFF_ISATAP) {  in packet_is_spoofed()
607 		if (!isatap_chksrc(skb, iph, tunnel))  in packet_is_spoofed()
613 	if (tunnel->dev->flags & IFF_POINTOPOINT)  in packet_is_spoofed()
618 	if (unlikely(is_spoofed_6rd(tunnel, iph->saddr, &ipv6h->saddr))) {  in packet_is_spoofed()
625 	if (likely(!is_spoofed_6rd(tunnel, iph->daddr, &ipv6h->daddr)))  in packet_is_spoofed()
628 	if (only_dnatted(tunnel, &ipv6h->daddr))  in packet_is_spoofed()
640 	struct ip_tunnel *tunnel;  in ipip6_rcv()  local
645 	tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev,  in ipip6_rcv()
647 	if (tunnel) {  in ipip6_rcv()
650 		if (tunnel->parms.iph.protocol != IPPROTO_IPV6 &&  in ipip6_rcv()
651 		    tunnel->parms.iph.protocol != 0)  in ipip6_rcv()
657 		skb->dev = tunnel->dev;  in ipip6_rcv()
659 		if (packet_is_spoofed(skb, iph, tunnel)) {  in ipip6_rcv()
660 			tunnel->dev->stats.rx_errors++;  in ipip6_rcv()
665 		    !net_eq(tunnel->net, dev_net(tunnel->dev))))  in ipip6_rcv()
678 				++tunnel->dev->stats.rx_frame_errors;  in ipip6_rcv()
679 				++tunnel->dev->stats.rx_errors;  in ipip6_rcv()
684 		tstats = this_cpu_ptr(tunnel->dev->tstats);  in ipip6_rcv()
717 	struct ip_tunnel *tunnel;  in sit_tunnel_rcv()  local
723 	tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev,  in sit_tunnel_rcv()
725 	if (tunnel) {  in sit_tunnel_rcv()
728 		if (tunnel->parms.iph.protocol != ipproto &&  in sit_tunnel_rcv()
729 		    tunnel->parms.iph.protocol != 0)  in sit_tunnel_rcv()
742 		return ip_tunnel_rcv(tunnel, skb, tpi, NULL, log_ecn_error);  in sit_tunnel_rcv()
768 static bool check_6rd(struct ip_tunnel *tunnel, const struct in6_addr *v6dst,  in check_6rd()  argument
772 	if (ipv6_prefix_equal(v6dst, &tunnel->ip6rd.prefix,  in check_6rd()
773 			      tunnel->ip6rd.prefixlen)) {  in check_6rd()
778 		pbw0 = tunnel->ip6rd.prefixlen >> 5;  in check_6rd()
779 		pbi0 = tunnel->ip6rd.prefixlen & 0x1f;  in check_6rd()
781 		d = tunnel->ip6rd.relay_prefixlen < 32 ?  in check_6rd()
783 		    tunnel->ip6rd.relay_prefixlen : 0;  in check_6rd()
785 		pbi1 = pbi0 - tunnel->ip6rd.relay_prefixlen;  in check_6rd()
790 		*v4dst = tunnel->ip6rd.relay_prefix | htonl(d);  in check_6rd()
803 static inline __be32 try_6rd(struct ip_tunnel *tunnel,  in try_6rd()  argument
807 	check_6rd(tunnel, v6dst, &dst);  in try_6rd()
819 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_tunnel_xmit()  local
820 	const struct iphdr  *tiph = &tunnel->parms.iph;  in ipip6_tunnel_xmit()
822 	u8     tos = tunnel->parms.iph.tos;  in ipip6_tunnel_xmit()
834 	int t_hlen = tunnel->hlen + sizeof(struct iphdr);  in ipip6_tunnel_xmit()
867 		dst = try_6rd(tunnel, &iph6->daddr);  in ipip6_tunnel_xmit()
899 	flowi4_init_output(&fl4, tunnel->parms.link, tunnel->fwmark,  in ipip6_tunnel_xmit()
902 			   sock_net_uid(tunnel->net, NULL));  in ipip6_tunnel_xmit()
904 	rt = dst_cache_get_ip4(&tunnel->dst_cache, &fl4.saddr);  in ipip6_tunnel_xmit()
906 		rt = ip_route_output_flow(tunnel->net, &fl4, NULL);  in ipip6_tunnel_xmit()
911 		dst_cache_set_ip4(&tunnel->dst_cache, &rt->dst, fl4.saddr);  in ipip6_tunnel_xmit()
946 		if (tunnel->parms.iph.daddr)  in ipip6_tunnel_xmit()
956 	if (tunnel->err_count > 0) {  in ipip6_tunnel_xmit()
958 				tunnel->err_time + IPTUNNEL_ERR_TIMEO)) {  in ipip6_tunnel_xmit()
959 			tunnel->err_count--;  in ipip6_tunnel_xmit()
962 			tunnel->err_count = 0;  in ipip6_tunnel_xmit()
990 	if (ip_tunnel_encap(skb, tunnel, &protocol, &fl4) < 0) {  in ipip6_tunnel_xmit()
998 		      df, !net_eq(tunnel->net, dev_net(dev)));  in ipip6_tunnel_xmit()
1012 	struct ip_tunnel *tunnel = netdev_priv(dev);  in sit_tunnel_xmit__()  local
1013 	const struct iphdr  *tiph = &tunnel->parms.iph;  in sit_tunnel_xmit__()
1062 	struct ip_tunnel *tunnel;  in ipip6_tunnel_bind_dev()  local
1066 	tunnel = netdev_priv(dev);  in ipip6_tunnel_bind_dev()
1067 	iph = &tunnel->parms.iph;  in ipip6_tunnel_bind_dev()
1070 		struct rtable *rt = ip_route_output_ports(tunnel->net, &fl4,  in ipip6_tunnel_bind_dev()
1076 							  tunnel->parms.link);  in ipip6_tunnel_bind_dev()
1085 	if (!tdev && tunnel->parms.link)  in ipip6_tunnel_bind_dev()
1086 		tdev = __dev_get_by_index(tunnel->net, tunnel->parms.link);  in ipip6_tunnel_bind_dev()
1089 		int t_hlen = tunnel->hlen + sizeof(struct iphdr);  in ipip6_tunnel_bind_dev()
1359 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_dev_free()  local
1361 	dst_cache_destroy(&tunnel->dst_cache);  in ipip6_dev_free()
1373 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_tunnel_setup()  local
1374 	int t_hlen = tunnel->hlen + sizeof(struct iphdr);  in ipip6_tunnel_setup()
1395 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_tunnel_init()  local
1398 	tunnel->dev = dev;  in ipip6_tunnel_init()
1399 	tunnel->net = dev_net(dev);  in ipip6_tunnel_init()
1400 	strcpy(tunnel->parms.name, dev->name);  in ipip6_tunnel_init()
1407 	err = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL);  in ipip6_tunnel_init()
1419 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_fb_tunnel_init()  local
1420 	struct iphdr *iph = &tunnel->parms.iph;  in ipip6_fb_tunnel_init()
1430 	rcu_assign_pointer(sitn->tunnels_wc[0], tunnel);  in ipip6_fb_tunnel_init()
1701 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipip6_fill_info()  local
1702 	struct ip_tunnel_parm *parm = &tunnel->parms;  in ipip6_fill_info()
1713 	    nla_put_u32(skb, IFLA_IPTUN_FWMARK, tunnel->fwmark))  in ipip6_fill_info()
1718 			     &tunnel->ip6rd.prefix) ||  in ipip6_fill_info()
1720 			    tunnel->ip6rd.relay_prefix) ||  in ipip6_fill_info()
1722 			tunnel->ip6rd.prefixlen) ||  in ipip6_fill_info()
1724 			tunnel->ip6rd.relay_prefixlen))  in ipip6_fill_info()
1729 			tunnel->encap.type) ||  in ipip6_fill_info()
1731 			tunnel->encap.sport) ||  in ipip6_fill_info()
1733 			tunnel->encap.dport) ||  in ipip6_fill_info()
1735 			tunnel->encap.flags))  in ipip6_fill_info()