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TOMOYO Linux Cross Reference
Linux/include/uapi/linux/icmp.h

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  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 #include <asm/byteorder.h>
 23 #include <linux/if.h>
 24 #include <linux/in6.h>
 25 
 26 #define ICMP_ECHOREPLY          0       /* Echo Reply                   */
 27 #define ICMP_DEST_UNREACH       3       /* Destination Unreachable      */
 28 #define ICMP_SOURCE_QUENCH      4       /* Source Quench                */
 29 #define ICMP_REDIRECT           5       /* Redirect (change route)      */
 30 #define ICMP_ECHO               8       /* Echo Request                 */
 31 #define ICMP_TIME_EXCEEDED      11      /* Time Exceeded                */
 32 #define ICMP_PARAMETERPROB      12      /* Parameter Problem            */
 33 #define ICMP_TIMESTAMP          13      /* Timestamp Request            */
 34 #define ICMP_TIMESTAMPREPLY     14      /* Timestamp Reply              */
 35 #define ICMP_INFO_REQUEST       15      /* Information Request          */
 36 #define ICMP_INFO_REPLY         16      /* Information Reply            */
 37 #define ICMP_ADDRESS            17      /* Address Mask Request         */
 38 #define ICMP_ADDRESSREPLY       18      /* Address Mask Reply           */
 39 #define NR_ICMP_TYPES           18
 40 
 41 
 42 /* Codes for UNREACH. */
 43 #define ICMP_NET_UNREACH        0       /* Network Unreachable          */
 44 #define ICMP_HOST_UNREACH       1       /* Host Unreachable             */
 45 #define ICMP_PROT_UNREACH       2       /* Protocol Unreachable         */
 46 #define ICMP_PORT_UNREACH       3       /* Port Unreachable             */
 47 #define ICMP_FRAG_NEEDED        4       /* Fragmentation Needed/DF set  */
 48 #define ICMP_SR_FAILED          5       /* Source Route failed          */
 49 #define ICMP_NET_UNKNOWN        6
 50 #define ICMP_HOST_UNKNOWN       7
 51 #define ICMP_HOST_ISOLATED      8
 52 #define ICMP_NET_ANO            9
 53 #define ICMP_HOST_ANO           10
 54 #define ICMP_NET_UNR_TOS        11
 55 #define ICMP_HOST_UNR_TOS       12
 56 #define ICMP_PKT_FILTERED       13      /* Packet filtered */
 57 #define ICMP_PREC_VIOLATION     14      /* Precedence violation */
 58 #define ICMP_PREC_CUTOFF        15      /* Precedence cut off */
 59 #define NR_ICMP_UNREACH         15      /* instead of hardcoding immediate value */
 60 
 61 /* Codes for REDIRECT. */
 62 #define ICMP_REDIR_NET          0       /* Redirect Net                 */
 63 #define ICMP_REDIR_HOST         1       /* Redirect Host                */
 64 #define ICMP_REDIR_NETTOS       2       /* Redirect Net for TOS         */
 65 #define ICMP_REDIR_HOSTTOS      3       /* Redirect Host for TOS        */
 66 
 67 /* Codes for TIME_EXCEEDED. */
 68 #define ICMP_EXC_TTL            0       /* TTL count exceeded           */
 69 #define ICMP_EXC_FRAGTIME       1       /* Fragment Reass time exceeded */
 70 
 71 /* Codes for EXT_ECHO (PROBE) */
 72 #define ICMP_EXT_ECHO                   42
 73 #define ICMP_EXT_ECHOREPLY              43
 74 #define ICMP_EXT_CODE_MAL_QUERY         1       /* Malformed Query */
 75 #define ICMP_EXT_CODE_NO_IF             2       /* No such Interface */
 76 #define ICMP_EXT_CODE_NO_TABLE_ENT      3       /* No such Table Entry */
 77 #define ICMP_EXT_CODE_MULT_IFS          4       /* Multiple Interfaces Satisfy Query */
 78 
 79 /* Constants for EXT_ECHO (PROBE) */
 80 #define ICMP_EXT_ECHOREPLY_ACTIVE       (1 << 2)/* active bit in reply message */
 81 #define ICMP_EXT_ECHOREPLY_IPV4         (1 << 1)/* ipv4 bit in reply message */
 82 #define ICMP_EXT_ECHOREPLY_IPV6         1       /* ipv6 bit in reply message */
 83 #define ICMP_EXT_ECHO_CTYPE_NAME        1
 84 #define ICMP_EXT_ECHO_CTYPE_INDEX       2
 85 #define ICMP_EXT_ECHO_CTYPE_ADDR        3
 86 #define ICMP_AFI_IP                     1       /* Address Family Identifier for ipv4 */
 87 #define ICMP_AFI_IP6                    2       /* Address Family Identifier for ipv6 */
 88 
 89 struct icmphdr {
 90   __u8          type;
 91   __u8          code;
 92   __sum16       checksum;
 93   union {
 94         struct {
 95                 __be16  id;
 96                 __be16  sequence;
 97         } echo;
 98         __be32  gateway;
 99         struct {
100                 __be16  __unused;
101                 __be16  mtu;
102         } frag;
103         __u8    reserved[4];
104   } un;
105 };
106 
107 
108 /*
109  *      constants for (set|get)sockopt
110  */
111 
112 #define ICMP_FILTER                     1
113 
114 struct icmp_filter {
115         __u32           data;
116 };
117 
118 /* RFC 4884 extension struct: one per message */
119 struct icmp_ext_hdr {
120 #if defined(__LITTLE_ENDIAN_BITFIELD)
121         __u8            reserved1:4,
122                         version:4;
123 #elif defined(__BIG_ENDIAN_BITFIELD)
124         __u8            version:4,
125                         reserved1:4;
126 #else
127 #error  "Please fix <asm/byteorder.h>"
128 #endif
129         __u8            reserved2;
130         __sum16         checksum;
131 };
132 
133 /* RFC 4884 extension object header: one for each object */
134 struct icmp_extobj_hdr {
135         __be16          length;
136         __u8            class_num;
137         __u8            class_type;
138 };
139 
140 /* RFC 8335: 2.1 Header for c-type 3 payload */
141 struct icmp_ext_echo_ctype3_hdr {
142         __be16          afi;
143         __u8            addrlen;
144         __u8            reserved;
145 };
146 
147 /* RFC 8335: 2.1 Interface Identification Object */
148 struct icmp_ext_echo_iio {
149         struct icmp_extobj_hdr extobj_hdr;
150         union {
151                 char name[IFNAMSIZ];
152                 __be32 ifindex;
153                 struct {
154                         struct icmp_ext_echo_ctype3_hdr ctype3_hdr;
155                         union {
156                                 __be32          ipv4_addr;
157                                 struct in6_addr ipv6_addr;
158                         } ip_addr;
159                 } addr;
160         } ident;
161 };
162 #endif /* _UAPI_LINUX_ICMP_H */
163 

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