| 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 | |
|---|
