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 | |
19 | static inline struct iphdr *ip_hdr(const struct sk_buff *skb) |
20 | { |
21 | return (struct iphdr *)skb_network_header(skb); |
22 | } |
23 | |
24 | static inline struct iphdr *inner_ip_hdr(const struct sk_buff *skb) |
25 | { |
26 | return (struct iphdr *)skb_inner_network_header(skb); |
27 | } |
28 | |
29 | static inline struct iphdr *ipip_hdr(const struct sk_buff *skb) |
30 | { |
31 | return (struct iphdr *)skb_transport_header(skb); |
32 | } |
33 | |
34 | static 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 | |