260 	const struct iphdr *iph;  in ip_rcv_options()  local
274 	iph = ip_hdr(skb);  in ip_rcv_options()
276 	opt->optlen = iph->ihl*4 - sizeof(struct iphdr);  in ip_rcv_options()
290 							     &iph->saddr,  in ip_rcv_options()
291 							     &iph->daddr);  in ip_rcv_options()
305 static bool ip_can_use_hint(const struct sk_buff *skb, const struct iphdr *iph,  in ip_can_use_hint()  argument
308 	return hint && !skb_dst(skb) && ip_hdr(hint)->daddr == iph->daddr &&  in ip_can_use_hint()
309 	       ip_hdr(hint)->tos == iph->tos;  in ip_can_use_hint()
318 	const struct iphdr *iph = ip_hdr(skb);  in ip_rcv_finish_core()  local
323 	if (ip_can_use_hint(skb, iph, hint)) {  in ip_rcv_finish_core()
324 		err = ip_route_use_hint(skb, iph->daddr, iph->saddr, iph->tos,  in ip_rcv_finish_core()
333 	    !ip_is_fragment(iph)) {  in ip_rcv_finish_core()
335 		int protocol = iph->protocol;  in ip_rcv_finish_core()
344 			iph = ip_hdr(skb);  in ip_rcv_finish_core()
353 		err = ip_route_input_noref(skb, iph->daddr, iph->saddr,  in ip_rcv_finish_core()
354 					   iph->tos, dev);  in ip_rcv_finish_core()
370 	if (iph->ihl > 5 && ip_rcv_options(skb, dev))  in ip_rcv_finish_core()
437 	const struct iphdr *iph;  in ip_rcv_core()  local
457 	iph = ip_hdr(skb);  in ip_rcv_core()
470 	if (iph->ihl < 5 || iph->version != 4)  in ip_rcv_core()
477 		       IPSTATS_MIB_NOECTPKTS + (iph->tos & INET_ECN_MASK),  in ip_rcv_core()
480 	if (!pskb_may_pull(skb, iph->ihl*4))  in ip_rcv_core()
483 	iph = ip_hdr(skb);  in ip_rcv_core()
485 	if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))  in ip_rcv_core()
488 	len = ntohs(iph->tot_len);  in ip_rcv_core()
492 	} else if (len < (iph->ihl*4))  in ip_rcv_core()
504 	iph = ip_hdr(skb);  in ip_rcv_core()
505 	skb->transport_header = skb->network_header + iph->ihl*4;  in ip_rcv_core()