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01: /*
02:  * INET         An implementation of the TCP/IP protocol suite for the LINUX
03:  *              operating system.  INET is implemented using the  BSD Socket
04:  *              interface as the means of communication with the user level.
05:  *
06:  *              Definitions for the ICMP protocol.
07:  *
08:  * Version:     @(#)icmp.h      1.0.3   04/28/93
09:  *
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/types.h>
21: 
22: #define ICMP_ECHOREPLY          0       /* Echo Reply                   */
23: #define ICMP_DEST_UNREACH       3       /* Destination Unreachable      */
24: #define ICMP_SOURCE_QUENCH      4       /* Source Quench                */
25: #define ICMP_REDIRECT           5       /* Redirect (change route)      */
26: #define ICMP_ECHO               8       /* Echo Request                 */
27: #define ICMP_TIME_EXCEEDED      11      /* Time Exceeded                */
28: #define ICMP_PARAMETERPROB      12      /* Parameter Problem            */
29: #define ICMP_TIMESTAMP          13      /* Timestamp Request            */
30: #define ICMP_TIMESTAMPREPLY     14      /* Timestamp Reply              */
31: #define ICMP_INFO_REQUEST       15      /* Information Request          */
32: #define ICMP_INFO_REPLY         16      /* Information Reply            */
33: #define ICMP_ADDRESS            17      /* Address Mask Request         */
34: #define ICMP_ADDRESSREPLY       18      /* Address Mask Reply           */
35: #define NR_ICMP_TYPES           18
36: 
37: 
38: /* Codes for UNREACH. */
39: #define ICMP_NET_UNREACH        0       /* Network Unreachable          */
40: #define ICMP_HOST_UNREACH       1       /* Host Unreachable             */
41: #define ICMP_PROT_UNREACH       2       /* Protocol Unreachable         */
42: #define ICMP_PORT_UNREACH       3       /* Port Unreachable             */
43: #define ICMP_FRAG_NEEDED        4       /* Fragmentation Needed/DF set  */
44: #define ICMP_SR_FAILED          5       /* Source Route failed          */
45: #define ICMP_NET_UNKNOWN        6
46: #define ICMP_HOST_UNKNOWN       7
47: #define ICMP_HOST_ISOLATED      8
48: #define ICMP_NET_ANO            9
49: #define ICMP_HOST_ANO           10
50: #define ICMP_NET_UNR_TOS        11
51: #define ICMP_HOST_UNR_TOS       12
52: #define ICMP_PKT_FILTERED       13      /* Packet filtered */
53: #define ICMP_PREC_VIOLATION     14      /* Precedence violation */
54: #define ICMP_PREC_CUTOFF        15      /* Precedence cut off */
55: #define NR_ICMP_UNREACH         15      /* instead of hardcoding immediate value */
56: 
57: /* Codes for REDIRECT. */
58: #define ICMP_REDIR_NET          0       /* Redirect Net                 */
59: #define ICMP_REDIR_HOST         1       /* Redirect Host                */
60: #define ICMP_REDIR_NETTOS       2       /* Redirect Net for TOS         */
61: #define ICMP_REDIR_HOSTTOS      3       /* Redirect Host for TOS        */
62: 
63: /* Codes for TIME_EXCEEDED. */
64: #define ICMP_EXC_TTL            0       /* TTL count exceeded           */
65: #define ICMP_EXC_FRAGTIME       1       /* Fragment Reass time exceeded */
66: 
67: 
68: struct icmphdr {
69:   __u8          type;
70:   __u8          code;
71:   __sum16       checksum;
72:   union {
73:         struct {
74:                 __be16  id;
75:                 __be16  sequence;
76:         } echo;
77:         __be32  gateway;
78:         struct {
79:                 __be16  __unused;
80:                 __be16  mtu;
81:         } frag;
82:   } un;
83: };
84: 
85: 
86: /*
87:  *      constants for (set|get)sockopt
88:  */
89: 
90: #define ICMP_FILTER                     1
91: 
92: struct icmp_filter {
93:         __u32           data;
94: };
95: 
96: 
97: #endif  /* _LINUX_ICMP_H */
98: 

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