include/uapi/linux/icmp.h

   1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   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 ICMP protocol.
   8  *
   9  * Version:     @(#)icmp.h      1.0.3   04/28/93
  10  *
  11  * Author:      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  12  *
  13  *              This program is free software; you can redistribute it and/or
  14  *              modify it under the terms of the GNU General Public License
  15  *              as published by the Free Software Foundation; either version
  16  *              2 of the License, or (at your option) any later version.
  17  */
  18 #ifndef _UAPI_LINUX_ICMP_H
  19 #define _UAPI_LINUX_ICMP_H
  20
  21 #include <linux/types.h>
  22
  23 #define ICMP_ECHOREPLY          0       /* Echo Reply                   */
  24 #define ICMP_DEST_UNREACH       3       /* Destination Unreachable      */
  25 #define ICMP_SOURCE_QUENCH      4       /* Source Quench                */
  26 #define ICMP_REDIRECT           5       /* Redirect (change route)      */
  27 #define ICMP_ECHO               8       /* Echo Request                 */
  28 #define ICMP_TIME_EXCEEDED      11      /* Time Exceeded                */
  29 #define ICMP_PARAMETERPROB      12      /* Parameter Problem            */
  30 #define ICMP_TIMESTAMP          13      /* Timestamp Request            */
  31 #define ICMP_TIMESTAMPREPLY     14      /* Timestamp Reply              */
  32 #define ICMP_INFO_REQUEST       15      /* Information Request          */
  33 #define ICMP_INFO_REPLY         16      /* Information Reply            */
  34 #define ICMP_ADDRESS            17      /* Address Mask Request         */
  35 #define ICMP_ADDRESSREPLY       18      /* Address Mask Reply           */
  36 #define NR_ICMP_TYPES           18
  37
  38
  39 /* Codes for UNREACH. */
  40 #define ICMP_NET_UNREACH        0       /* Network Unreachable          */
  41 #define ICMP_HOST_UNREACH       1       /* Host Unreachable             */
  42 #define ICMP_PROT_UNREACH       2       /* Protocol Unreachable         */
  43 #define ICMP_PORT_UNREACH       3       /* Port Unreachable             */
  44 #define ICMP_FRAG_NEEDED        4       /* Fragmentation Needed/DF set  */
  45 #define ICMP_SR_FAILED          5       /* Source Route failed          */
  46 #define ICMP_NET_UNKNOWN        6
  47 #define ICMP_HOST_UNKNOWN       7
  48 #define ICMP_HOST_ISOLATED      8
  49 #define ICMP_NET_ANO            9
  50 #define ICMP_HOST_ANO           10
  51 #define ICMP_NET_UNR_TOS        11
  52 #define ICMP_HOST_UNR_TOS       12
  53 #define ICMP_PKT_FILTERED       13      /* Packet filtered */
  54 #define ICMP_PREC_VIOLATION     14      /* Precedence violation */
  55 #define ICMP_PREC_CUTOFF        15      /* Precedence cut off */
  56 #define NR_ICMP_UNREACH         15      /* instead of hardcoding immediate value */
  57
  58 /* Codes for REDIRECT. */
  59 #define ICMP_REDIR_NET          0       /* Redirect Net                 */
  60 #define ICMP_REDIR_HOST         1       /* Redirect Host                */
  61 #define ICMP_REDIR_NETTOS       2       /* Redirect Net for TOS         */
  62 #define ICMP_REDIR_HOSTTOS      3       /* Redirect Host for TOS        */
  63
  64 /* Codes for TIME_EXCEEDED. */
  65 #define ICMP_EXC_TTL            0       /* TTL count exceeded           */
  66 #define ICMP_EXC_FRAGTIME       1       /* Fragment Reass time exceeded */
  67
  68
  69 struct icmphdr {
  70   __u8          type;
  71   __u8          code;
  72   __sum16       checksum;
  73   union {
  74         struct {
  75                 __be16  id;
  76                 __be16  sequence;
  77         } echo;
  78         __be32  gateway;
  79         struct {
  80                 __be16  __unused;
  81                 __be16  mtu;
  82         } frag;
  83         __u8    reserved[4];
  84   } un;
  85 };
  86
  87
  88 /*
  89  *      constants for (set|get)sockopt
  90  */
  91
  92 #define ICMP_FILTER                     1
  93
  94 struct icmp_filter {
  95         __u32           data;
  96 };
  97
  98
  99 #endif /* _UAPI_LINUX_ICMP_H */