LXR linux-old/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#define ICMP_ECHOREPLY          0       /* Echo Reply                   */
  21#define ICMP_DEST_UNREACH       3       /* Destination Unreachable      */
  22#define ICMP_SOURCE_QUENCH      4       /* Source Quench                */
  23#define ICMP_REDIRECT           5       /* Redirect (change route)      */
  24#define ICMP_ECHO               8       /* Echo Request                 */
  25#define ICMP_TIME_EXCEEDED      11      /* Time Exceeded                */
  26#define ICMP_PARAMETERPROB      12      /* Parameter Problem            */
  27#define ICMP_TIMESTAMP          13      /* Timestamp Request            */
  28#define ICMP_TIMESTAMPREPLY     14      /* Timestamp Reply              */
  29#define ICMP_INFO_REQUEST       15      /* Information Request          */
  30#define ICMP_INFO_REPLY         16      /* Information Reply            */
  31#define ICMP_ADDRESS            17      /* Address Mask Request         */
  32#define ICMP_ADDRESSREPLY       18      /* Address Mask Reply           */
  33#define NR_ICMP_TYPES           18
  34
  35
  36/* Codes for UNREACH. */
  37#define ICMP_NET_UNREACH        0       /* Network Unreachable          */
  38#define ICMP_HOST_UNREACH       1       /* Host Unreachable             */
  39#define ICMP_PROT_UNREACH       2       /* Protocol Unreachable         */
  40#define ICMP_PORT_UNREACH       3       /* Port Unreachable             */
  41#define ICMP_FRAG_NEEDED        4       /* Fragmentation Needed/DF set  */
  42#define ICMP_SR_FAILED          5       /* Source Route failed          */
  43#define ICMP_NET_UNKNOWN        6
  44#define ICMP_HOST_UNKNOWN       7
  45#define ICMP_HOST_ISOLATED      8
  46#define ICMP_NET_ANO            9
  47#define ICMP_HOST_ANO           10
  48#define ICMP_NET_UNR_TOS        11
  49#define ICMP_HOST_UNR_TOS       12
  50#define ICMP_PKT_FILTERED       13      /* Packet filtered */
  51#define ICMP_PREC_VIOLATION     14      /* Precedence violation */
  52#define ICMP_PREC_CUTOFF        15      /* Precedence cut off */
  53#define NR_ICMP_UNREACH         15      /* instead of hardcoding immediate value */
  54
  55/* Codes for REDIRECT. */
  56#define ICMP_REDIR_NET          0       /* Redirect Net                 */
  57#define ICMP_REDIR_HOST         1       /* Redirect Host                */
  58#define ICMP_REDIR_NETTOS       2       /* Redirect Net for TOS         */
  59#define ICMP_REDIR_HOSTTOS      3       /* Redirect Host for TOS        */
  60
  61/* Codes for TIME_EXCEEDED. */
  62#define ICMP_EXC_TTL            0       /* TTL count exceeded           */
  63#define ICMP_EXC_FRAGTIME       1       /* Fragment Reass time exceeded */
  64
  65
  66struct icmphdr {
  67  __u8          type;
  68  __u8          code;
  69  __u16         checksum;
  70  union {
  71        struct {
  72                __u16   id;
  73                __u16   sequence;
  74        } echo;
  75        __u32   gateway;
  76        struct {
  77                __u16   __unused;
  78                __u16   mtu;
  79        } frag;
  80  } un;
  81};
  82
  83/*
  84 *      constants for (set|get)sockopt
  85 */
  86
  87#define ICMP_FILTER                     1
  88
  89struct icmp_filter {
  90        __u32           data;
  91};
  92
  93
  94#endif  /* _LINUX_ICMP_H */
  95