1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * INET An implementation of the TCP/IP protocol suite for the LINUX 4*4882a593Smuzhiyun * operating system. INET is implemented using the BSD Socket 5*4882a593Smuzhiyun * interface as the means of communication with the user level. 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Definitions for the IP protocol. 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * Version: @(#)ip.h 1.0.2 04/28/93 10*4882a593Smuzhiyun * 11*4882a593Smuzhiyun * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 12*4882a593Smuzhiyun */ 13*4882a593Smuzhiyun #ifndef _LINUX_IP_H 14*4882a593Smuzhiyun #define _LINUX_IP_H 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #include <linux/skbuff.h> 17*4882a593Smuzhiyun #include <uapi/linux/ip.h> 18*4882a593Smuzhiyun ip_hdr(const struct sk_buff * skb)19*4882a593Smuzhiyunstatic inline struct iphdr *ip_hdr(const struct sk_buff *skb) 20*4882a593Smuzhiyun { 21*4882a593Smuzhiyun return (struct iphdr *)skb_network_header(skb); 22*4882a593Smuzhiyun } 23*4882a593Smuzhiyun inner_ip_hdr(const struct sk_buff * skb)24*4882a593Smuzhiyunstatic inline struct iphdr *inner_ip_hdr(const struct sk_buff *skb) 25*4882a593Smuzhiyun { 26*4882a593Smuzhiyun return (struct iphdr *)skb_inner_network_header(skb); 27*4882a593Smuzhiyun } 28*4882a593Smuzhiyun ipip_hdr(const struct sk_buff * skb)29*4882a593Smuzhiyunstatic inline struct iphdr *ipip_hdr(const struct sk_buff *skb) 30*4882a593Smuzhiyun { 31*4882a593Smuzhiyun return (struct iphdr *)skb_transport_header(skb); 32*4882a593Smuzhiyun } 33*4882a593Smuzhiyun ip_transport_len(const struct sk_buff * skb)34*4882a593Smuzhiyunstatic inline unsigned int ip_transport_len(const struct sk_buff *skb) 35*4882a593Smuzhiyun { 36*4882a593Smuzhiyun return ntohs(ip_hdr(skb)->tot_len) - skb_network_header_len(skb); 37*4882a593Smuzhiyun } 38*4882a593Smuzhiyun #endif /* _LINUX_IP_H */ 39