From: Nazarov Sergey <s-naza...@yandex.ru> Date: Fri, 22 Feb 2019 19:35:29 +0300
> I tried to analyze the cases of using icmp_send in kernel. It > indirectly used by many protocols: ARP, IP, UDP, Netfilter, IPVS, > IPIP, GRE over IP, CLIP, XFRM, CIPSOv4. Different IP tunnels and > XFRM operating directly over IP layer and if using own skb->cb data, > having IP header data in front of it. CLIP uses icmp_send for > packets from arp queue only. So, If I right, only TCP layer moves > IP header data and only CIPSOv4 operates on both IP and TCP layers > now. Ok.
