68 	bool	(*func)(struct sk_buff *skb, int offset);
77 static bool ip6_tlvopt_unknown(struct sk_buff *skb, int optoff,  in ip6_tlvopt_unknown()  argument
91 	switch ((skb_network_header(skb)[optoff] & 0xC0) >> 6) {  in ip6_tlvopt_unknown()
102 		if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr))  in ip6_tlvopt_unknown()
106 		icmpv6_param_prob(skb, ICMPV6_UNK_OPTION, optoff);  in ip6_tlvopt_unknown()
111 	kfree_skb(skb);  in ip6_tlvopt_unknown()
118 			  struct sk_buff *skb,  in ip6_parse_tlv()  argument
121 	int len = (skb_transport_header(skb)[1] + 1) << 3;  in ip6_parse_tlv()
122 	const unsigned char *nh = skb_network_header(skb);  in ip6_parse_tlv()
123 	int off = skb_network_header_len(skb);  in ip6_parse_tlv()
134 	if (skb_transport_offset(skb) + len > skb_headlen(skb))  in ip6_parse_tlv()
184 					if (curr->func(skb, off) == false)  in ip6_parse_tlv()
190 			    !ip6_tlvopt_unknown(skb, off, disallow_unknowns))  in ip6_parse_tlv()
203 	kfree_skb(skb);  in ip6_parse_tlv()
212 static bool ipv6_dest_hao(struct sk_buff *skb, int optoff)  in ipv6_dest_hao()  argument
215 	struct inet6_skb_parm *opt = IP6CB(skb);  in ipv6_dest_hao()
216 	struct ipv6hdr *ipv6h = ipv6_hdr(skb);  in ipv6_dest_hao()
226 	hao = (struct ipv6_destopt_hao *)(skb_network_header(skb) + optoff);  in ipv6_dest_hao()
240 	ret = xfrm6_input_addr(skb, (xfrm_address_t *)&ipv6h->daddr,  in ipv6_dest_hao()
245 	if (skb_cloned(skb)) {  in ipv6_dest_hao()
246 		if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))  in ipv6_dest_hao()
250 		hao = (struct ipv6_destopt_hao *)(skb_network_header(skb) +  in ipv6_dest_hao()
252 		ipv6h = ipv6_hdr(skb);  in ipv6_dest_hao()
255 	if (skb->ip_summed == CHECKSUM_COMPLETE)  in ipv6_dest_hao()
256 		skb->ip_summed = CHECKSUM_NONE;  in ipv6_dest_hao()
260 	if (skb->tstamp == 0)  in ipv6_dest_hao()
261 		__net_timestamp(skb);  in ipv6_dest_hao()
266 	kfree_skb(skb);  in ipv6_dest_hao()
281 static int ipv6_destopt_rcv(struct sk_buff *skb)  in ipv6_destopt_rcv()  argument
283 	struct inet6_dev *idev = __in6_dev_get(skb->dev);  in ipv6_destopt_rcv()
284 	struct inet6_skb_parm *opt = IP6CB(skb);  in ipv6_destopt_rcv()
288 	struct dst_entry *dst = skb_dst(skb);  in ipv6_destopt_rcv()
289 	struct net *net = dev_net(skb->dev);  in ipv6_destopt_rcv()
292 	if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) ||  in ipv6_destopt_rcv()
293 	    !pskb_may_pull(skb, (skb_transport_offset(skb) +  in ipv6_destopt_rcv()
294 				 ((skb_transport_header(skb)[1] + 1) << 3)))) {  in ipv6_destopt_rcv()
298 		kfree_skb(skb);  in ipv6_destopt_rcv()
302 	extlen = (skb_transport_header(skb)[1] + 1) << 3;  in ipv6_destopt_rcv()
306 	opt->lastopt = opt->dst1 = skb_network_header_len(skb);  in ipv6_destopt_rcv()
311 	if (ip6_parse_tlv(tlvprocdestopt_lst, skb,  in ipv6_destopt_rcv()
313 		skb->transport_header += extlen;  in ipv6_destopt_rcv()
314 		opt = IP6CB(skb);  in ipv6_destopt_rcv()
327 static void seg6_update_csum(struct sk_buff *skb)  in seg6_update_csum()  argument
337 	hdr = (struct ipv6_sr_hdr *)skb_transport_header(skb);  in seg6_update_csum()
348 	update_csum_diff4(skb, from, to);  in seg6_update_csum()
352 	update_csum_diff16(skb, (__be32 *)(&ipv6_hdr(skb)->daddr),  in seg6_update_csum()
356 static int ipv6_srh_rcv(struct sk_buff *skb)  in ipv6_srh_rcv()  argument
358 	struct inet6_skb_parm *opt = IP6CB(skb);  in ipv6_srh_rcv()
359 	struct net *net = dev_net(skb->dev);  in ipv6_srh_rcv()
365 	hdr = (struct ipv6_sr_hdr *)skb_transport_header(skb);  in ipv6_srh_rcv()
367 	idev = __in6_dev_get(skb->dev);  in ipv6_srh_rcv()
374 		kfree_skb(skb);  in ipv6_srh_rcv()
379 	if (!seg6_hmac_validate_skb(skb)) {  in ipv6_srh_rcv()
380 		kfree_skb(skb);  in ipv6_srh_rcv()
390 			skb_postpull_rcsum(skb, skb_network_header(skb),  in ipv6_srh_rcv()
391 					   skb_network_header_len(skb));  in ipv6_srh_rcv()
393 			if (!pskb_pull(skb, offset)) {  in ipv6_srh_rcv()
394 				kfree_skb(skb);  in ipv6_srh_rcv()
397 			skb_postpull_rcsum(skb, skb_transport_header(skb),  in ipv6_srh_rcv()
400 			skb_reset_network_header(skb);  in ipv6_srh_rcv()
401 			skb_reset_transport_header(skb);  in ipv6_srh_rcv()
402 			skb->encapsulation = 0;  in ipv6_srh_rcv()
404 			__skb_tunnel_rx(skb, skb->dev, net);  in ipv6_srh_rcv()
406 			netif_rx(skb);  in ipv6_srh_rcv()
410 		opt->srcrt = skb_network_header_len(skb);  in ipv6_srh_rcv()
412 		skb->transport_header += (hdr->hdrlen + 1) << 3;  in ipv6_srh_rcv()
413 		opt->nhoff = (&hdr->nexthdr) - skb_network_header(skb);  in ipv6_srh_rcv()
420 		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,  in ipv6_srh_rcv()
422 				   skb_network_header(skb)));  in ipv6_srh_rcv()
426 	if (skb_cloned(skb)) {  in ipv6_srh_rcv()
427 		if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) {  in ipv6_srh_rcv()
428 			__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),  in ipv6_srh_rcv()
430 			kfree_skb(skb);  in ipv6_srh_rcv()
435 	hdr = (struct ipv6_sr_hdr *)skb_transport_header(skb);  in ipv6_srh_rcv()
440 	skb_push(skb, sizeof(struct ipv6hdr));  in ipv6_srh_rcv()
442 	if (skb->ip_summed == CHECKSUM_COMPLETE)  in ipv6_srh_rcv()
443 		seg6_update_csum(skb);  in ipv6_srh_rcv()
445 	ipv6_hdr(skb)->daddr = *addr;  in ipv6_srh_rcv()
447 	skb_dst_drop(skb);  in ipv6_srh_rcv()
449 	ip6_route_input(skb);  in ipv6_srh_rcv()
451 	if (skb_dst(skb)->error) {  in ipv6_srh_rcv()
452 		dst_input(skb);  in ipv6_srh_rcv()
456 	if (skb_dst(skb)->dev->flags & IFF_LOOPBACK) {  in ipv6_srh_rcv()
457 		if (ipv6_hdr(skb)->hop_limit <= 1) {  in ipv6_srh_rcv()
459 			icmpv6_send(skb, ICMPV6_TIME_EXCEED,  in ipv6_srh_rcv()
461 			kfree_skb(skb);  in ipv6_srh_rcv()
464 		ipv6_hdr(skb)->hop_limit--;  in ipv6_srh_rcv()
466 		skb_pull(skb, sizeof(struct ipv6hdr));  in ipv6_srh_rcv()
470 	dst_input(skb);  in ipv6_srh_rcv()
480 static int ipv6_rthdr_rcv(struct sk_buff *skb)  in ipv6_rthdr_rcv()  argument
482 	struct inet6_dev *idev = __in6_dev_get(skb->dev);  in ipv6_rthdr_rcv()
483 	struct inet6_skb_parm *opt = IP6CB(skb);  in ipv6_rthdr_rcv()
489 	struct net *net = dev_net(skb->dev);  in ipv6_rthdr_rcv()
492 	idev = __in6_dev_get(skb->dev);  in ipv6_rthdr_rcv()
496 	if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) ||  in ipv6_rthdr_rcv()
497 	    !pskb_may_pull(skb, (skb_transport_offset(skb) +  in ipv6_rthdr_rcv()
498 				 ((skb_transport_header(skb)[1] + 1) << 3)))) {  in ipv6_rthdr_rcv()
500 		kfree_skb(skb);  in ipv6_rthdr_rcv()
504 	hdr = (struct ipv6_rt_hdr *)skb_transport_header(skb);  in ipv6_rthdr_rcv()
506 	if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ||  in ipv6_rthdr_rcv()
507 	    skb->pkt_type != PACKET_HOST) {  in ipv6_rthdr_rcv()
509 		kfree_skb(skb);  in ipv6_rthdr_rcv()
515 		return ipv6_srh_rcv(skb);  in ipv6_rthdr_rcv()
528 				kfree_skb(skb);  in ipv6_rthdr_rcv()
537 		opt->lastopt = opt->srcrt = skb_network_header_len(skb);  in ipv6_rthdr_rcv()
538 		skb->transport_header += (hdr->hdrlen + 1) << 3;  in ipv6_rthdr_rcv()
541 		opt->nhoff = (&hdr->nexthdr) - skb_network_header(skb);  in ipv6_rthdr_rcv()
553 			kfree_skb(skb);  in ipv6_rthdr_rcv()
571 		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,  in ipv6_rthdr_rcv()
573 				   skb_network_header(skb)));  in ipv6_rthdr_rcv()
580 	if (skb_cloned(skb)) {  in ipv6_rthdr_rcv()
582 		if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) {  in ipv6_rthdr_rcv()
583 			__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),  in ipv6_rthdr_rcv()
585 			kfree_skb(skb);  in ipv6_rthdr_rcv()
588 		hdr = (struct ipv6_rt_hdr *)skb_transport_header(skb);  in ipv6_rthdr_rcv()
591 	if (skb->ip_summed == CHECKSUM_COMPLETE)  in ipv6_rthdr_rcv()
592 		skb->ip_summed = CHECKSUM_NONE;  in ipv6_rthdr_rcv()
603 		if (xfrm6_input_addr(skb, (xfrm_address_t *)addr,  in ipv6_rthdr_rcv()
604 				     (xfrm_address_t *)&ipv6_hdr(skb)->saddr,  in ipv6_rthdr_rcv()
607 			kfree_skb(skb);  in ipv6_rthdr_rcv()
610 		if (!ipv6_chk_home_addr(dev_net(skb_dst(skb)->dev), addr)) {  in ipv6_rthdr_rcv()
612 			kfree_skb(skb);  in ipv6_rthdr_rcv()
623 		kfree_skb(skb);  in ipv6_rthdr_rcv()
628 	*addr = ipv6_hdr(skb)->daddr;  in ipv6_rthdr_rcv()
629 	ipv6_hdr(skb)->daddr = daddr;  in ipv6_rthdr_rcv()
631 	skb_dst_drop(skb);  in ipv6_rthdr_rcv()
632 	ip6_route_input(skb);  in ipv6_rthdr_rcv()
633 	if (skb_dst(skb)->error) {  in ipv6_rthdr_rcv()
634 		skb_push(skb, skb->data - skb_network_header(skb));  in ipv6_rthdr_rcv()
635 		dst_input(skb);  in ipv6_rthdr_rcv()
639 	if (skb_dst(skb)->dev->flags&IFF_LOOPBACK) {  in ipv6_rthdr_rcv()
640 		if (ipv6_hdr(skb)->hop_limit <= 1) {  in ipv6_rthdr_rcv()
642 			icmpv6_send(skb, ICMPV6_TIME_EXCEED, ICMPV6_EXC_HOPLIMIT,  in ipv6_rthdr_rcv()
644 			kfree_skb(skb);  in ipv6_rthdr_rcv()
647 		ipv6_hdr(skb)->hop_limit--;  in ipv6_rthdr_rcv()
651 	skb_push(skb, skb->data - skb_network_header(skb));  in ipv6_rthdr_rcv()
652 	dst_input(skb);  in ipv6_rthdr_rcv()
657 	icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,  in ipv6_rthdr_rcv()
658 			  (&hdr->type) - skb_network_header(skb));  in ipv6_rthdr_rcv()
716 static inline struct inet6_dev *ipv6_skb_idev(struct sk_buff *skb)  in ipv6_skb_idev()  argument
718 	return skb_dst(skb) ? ip6_dst_idev(skb_dst(skb)) : __in6_dev_get(skb->dev);  in ipv6_skb_idev()
721 static inline struct net *ipv6_skb_net(struct sk_buff *skb)  in ipv6_skb_net()  argument
723 	return skb_dst(skb) ? dev_net(skb_dst(skb)->dev) : dev_net(skb->dev);  in ipv6_skb_net()
728 static bool ipv6_hop_ra(struct sk_buff *skb, int optoff)  in ipv6_hop_ra()  argument
730 	const unsigned char *nh = skb_network_header(skb);  in ipv6_hop_ra()
733 		IP6CB(skb)->flags |= IP6SKB_ROUTERALERT;  in ipv6_hop_ra()
734 		memcpy(&IP6CB(skb)->ra, nh + optoff + 2, sizeof(IP6CB(skb)->ra));  in ipv6_hop_ra()
739 	kfree_skb(skb);  in ipv6_hop_ra()
745 static bool ipv6_hop_jumbo(struct sk_buff *skb, int optoff)  in ipv6_hop_jumbo()  argument
747 	const unsigned char *nh = skb_network_header(skb);  in ipv6_hop_jumbo()
748 	struct inet6_dev *idev = __in6_dev_get_safely(skb->dev);  in ipv6_hop_jumbo()
749 	struct net *net = ipv6_skb_net(skb);  in ipv6_hop_jumbo()
762 		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, optoff+2);  in ipv6_hop_jumbo()
765 	if (ipv6_hdr(skb)->payload_len) {  in ipv6_hop_jumbo()
767 		icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, optoff);  in ipv6_hop_jumbo()
771 	if (pkt_len > skb->len - sizeof(struct ipv6hdr)) {  in ipv6_hop_jumbo()
776 	if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr)))  in ipv6_hop_jumbo()
779 	IP6CB(skb)->flags |= IP6SKB_JUMBOGRAM;  in ipv6_hop_jumbo()
783 	kfree_skb(skb);  in ipv6_hop_jumbo()
789 static bool ipv6_hop_calipso(struct sk_buff *skb, int optoff)  in ipv6_hop_calipso()  argument
791 	const unsigned char *nh = skb_network_header(skb);  in ipv6_hop_calipso()
799 	if (!calipso_validate(skb, nh + optoff))  in ipv6_hop_calipso()
805 	kfree_skb(skb);  in ipv6_hop_calipso()
825 int ipv6_parse_hopopts(struct sk_buff *skb)  in ipv6_parse_hopopts()  argument
827 	struct inet6_skb_parm *opt = IP6CB(skb);  in ipv6_parse_hopopts()
828 	struct net *net = dev_net(skb->dev);  in ipv6_parse_hopopts()
837 	if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + 8) ||  in ipv6_parse_hopopts()
838 	    !pskb_may_pull(skb, (sizeof(struct ipv6hdr) +  in ipv6_parse_hopopts()
839 				 ((skb_transport_header(skb)[1] + 1) << 3)))) {  in ipv6_parse_hopopts()
841 		kfree_skb(skb);  in ipv6_parse_hopopts()
845 	extlen = (skb_transport_header(skb)[1] + 1) << 3;  in ipv6_parse_hopopts()
850 	if (ip6_parse_tlv(tlvprochopopt_lst, skb,  in ipv6_parse_hopopts()
852 		skb->transport_header += extlen;  in ipv6_parse_hopopts()
853 		opt = IP6CB(skb);  in ipv6_parse_hopopts()
870 static void ipv6_push_rthdr0(struct sk_buff *skb, u8 *proto,  in ipv6_push_rthdr0()  argument
879 	phdr = skb_push(skb, (ihdr->rt_hdr.hdrlen + 1) << 3);  in ipv6_push_rthdr0()
895 static void ipv6_push_rthdr4(struct sk_buff *skb, u8 *proto,  in ipv6_push_rthdr4()  argument
905 	sr_phdr = skb_push(skb, plen);  in ipv6_push_rthdr4()
928 		if (skb->dev)  in ipv6_push_rthdr4()
929 			net = dev_net(skb->dev);  in ipv6_push_rthdr4()
930 		else if (skb->sk)  in ipv6_push_rthdr4()
931 			net = sock_net(skb->sk);  in ipv6_push_rthdr4()
944 static void ipv6_push_rthdr(struct sk_buff *skb, u8 *proto,  in ipv6_push_rthdr()  argument
952 		ipv6_push_rthdr0(skb, proto, opt, addr_p, saddr);  in ipv6_push_rthdr()
955 		ipv6_push_rthdr4(skb, proto, opt, addr_p, saddr);  in ipv6_push_rthdr()
962 static void ipv6_push_exthdr(struct sk_buff *skb, u8 *proto, u8 type, struct ipv6_opt_hdr *opt)  in ipv6_push_exthdr()  argument
964 	struct ipv6_opt_hdr *h = skb_push(skb, ipv6_optlen(opt));  in ipv6_push_exthdr()
971 void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,  in ipv6_push_nfrag_opts()  argument
976 		ipv6_push_rthdr(skb, proto, opt->srcrt, daddr, saddr);  in ipv6_push_nfrag_opts()
982 			ipv6_push_exthdr(skb, proto, NEXTHDR_DEST, opt->dst0opt);  in ipv6_push_nfrag_opts()
985 		ipv6_push_exthdr(skb, proto, NEXTHDR_HOP, opt->hopopt);  in ipv6_push_nfrag_opts()
988 void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, u8 *proto)  in ipv6_push_frag_opts()  argument
991 		ipv6_push_exthdr(skb, proto, NEXTHDR_DEST, opt->dst1opt);  in ipv6_push_frag_opts()