| | 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 */ |
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