LXR linux/include/linux/icmp.h

   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 ICMP protocol.
   7 *
   8 * Version:     @(#)icmp.h      1.0.3   04/28/93
   9 *
  10 * Author:      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_ICMP_H
  18#define _LINUX_ICMP_H
  19
  20#include <linux/skbuff.h>
  21#include <uapi/linux/icmp.h>
  22
  23static inline struct icmphdr *icmp_hdr(const struct sk_buff *skb)
  24{
  25        return (struct icmphdr *)skb_transport_header(skb);
  26}
  27
  28static inline bool icmp_is_err(int type)
  29{
  30        switch (type) {
  31        case ICMP_DEST_UNREACH:
  32        case ICMP_SOURCE_QUENCH:
  33        case ICMP_REDIRECT:
  34        case ICMP_TIME_EXCEEDED:
  35        case ICMP_PARAMETERPROB:
  36                return true;
  37        }
  38
  39        return false;
  40}
  41
  42#endif  /* _LINUX_ICMP_H */
  43