The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/include/linux/ip.h

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    1 /*
    2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
    3  *              operating system.  INET is implemented using the  BSD Socket
    4  *              interface as the means of communication with the user level.
    5  *
    6  *              Definitions for the IP protocol.
    7  *
    8  * Version:     @(#)ip.h        1.0.2   04/28/93
    9  *
   10  * Authors:     Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
   11  *
   12  *              This program is free software; you can redistribute it and/or
   13  *              modify it under the terms of the GNU General Public License
   14  *              as published by the Free Software Foundation; either version
   15  *              2 of the License, or (at your option) any later version.
   16  */
   17 #ifndef _LINUX_IP_H
   18 #define _LINUX_IP_H
   19 
   20 #include <linux/skbuff.h>
   21 #include <uapi/linux/ip.h>
   22 
   23 static inline struct iphdr *ip_hdr(const struct sk_buff *skb)
   24 {
   25         return (struct iphdr *)skb_network_header(skb);
   26 }
   27 
   28 static inline struct iphdr *inner_ip_hdr(const struct sk_buff *skb)
   29 {
   30         return (struct iphdr *)skb_inner_network_header(skb);
   31 }
   32 
   33 static inline struct iphdr *ipip_hdr(const struct sk_buff *skb)
   34 {
   35         return (struct iphdr *)skb_transport_header(skb);
   36 }
   37 #endif  /* _LINUX_IP_H */

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