263 	const struct iphdr *iph;  in ip_rcv_options()  local
277 	iph = ip_hdr(skb);  in ip_rcv_options()
279 	opt->optlen = iph->ihl*4 - sizeof(struct iphdr);  in ip_rcv_options()
293 							     &iph->saddr,  in ip_rcv_options()
294 							     &iph->daddr);  in ip_rcv_options()
308 static bool ip_can_use_hint(const struct sk_buff *skb, const struct iphdr *iph,  in ip_can_use_hint()  argument
311 	return hint && !skb_dst(skb) && ip_hdr(hint)->daddr == iph->daddr &&  in ip_can_use_hint()
312 	       ip_hdr(hint)->tos == iph->tos;  in ip_can_use_hint()
321 	const struct iphdr *iph = ip_hdr(skb);  in ip_rcv_finish_core()  local
325 	if (ip_can_use_hint(skb, iph, hint)) {  in ip_rcv_finish_core()
326 		drop_reason = ip_route_use_hint(skb, iph->daddr, iph->saddr,  in ip_rcv_finish_core()
327 						ip4h_dscp(iph), dev, hint);  in ip_rcv_finish_core()
336 	    !ip_is_fragment(iph)) {  in ip_rcv_finish_core()
337 		switch (iph->protocol) {  in ip_rcv_finish_core()
343 				iph = ip_hdr(skb);  in ip_rcv_finish_core()
353 				iph = ip_hdr(skb);  in ip_rcv_finish_core()
364 		drop_reason = ip_route_input_noref(skb, iph->daddr, iph->saddr,  in ip_rcv_finish_core()
365 						   ip4h_dscp(iph), dev);  in ip_rcv_finish_core()
387 	if (iph->ihl > 5 && ip_rcv_options(skb, dev))  in ip_rcv_finish_core()
456 	const struct iphdr *iph;  in ip_rcv_core()  local
481 	iph = ip_hdr(skb);  in ip_rcv_core()
494 	if (iph->ihl < 5 || iph->version != 4)  in ip_rcv_core()
501 		       IPSTATS_MIB_NOECTPKTS + (iph->tos & INET_ECN_MASK),  in ip_rcv_core()
504 	if (!pskb_may_pull(skb, iph->ihl*4))  in ip_rcv_core()
507 	iph = ip_hdr(skb);  in ip_rcv_core()
509 	if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))  in ip_rcv_core()
512 	len = iph_totlen(skb, iph);  in ip_rcv_core()
517 	} else if (len < (iph->ihl*4))  in ip_rcv_core()
529 	iph = ip_hdr(skb);  in ip_rcv_core()
530 	skb->transport_header = skb->network_header + iph->ihl*4;  in ip_rcv_core()