ipip_hdr 19 net/ipv4/xfrm4_mode_tunnel.c struct iphdr *inner_iph = ipip_hdr(skb); ipip_hdr 82 net/ipv4/xfrm4_mode_tunnel.c ipv4_copy_dscp(XFRM_MODE_SKB_CB(skb)->tos, ipip_hdr(skb));