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

source code of linux/include/linux/ip.h