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1 /* |
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2 * INET An implementation of the TCP/IP protocol suite for the LINUX |
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3 * operating system. INET is implemented using the BSD Socket |
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4 * interface as the means of communication with the user level. |
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5 * |
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6 * Definitions for the ICMP protocol. |
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7 * |
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8 * Version: @(#)icmp.h 1.0.3 04/28/93 |
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9 * |
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10 * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
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11 * |
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12 * This program is free software; you can redistribute it and/or |
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13 * modify it under the terms of the GNU General Public License |
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14 * as published by the Free Software Foundation; either version |
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15 * 2 of the License, or (at your option) any later version. |
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16 */ |
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17 #ifndef _LINUX_ICMP_H |
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18 #define _LINUX_ICMP_H |
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19 |
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20 #include <linux/types.h> |
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21 |
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22 #define ICMP_ECHOREPLY 0 /* Echo Reply */ |
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23 #define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ |
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24 #define ICMP_SOURCE_QUENCH 4 /* Source Quench */ |
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25 #define ICMP_REDIRECT 5 /* Redirect (change route) */ |
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26 #define ICMP_ECHO 8 /* Echo Request */ |
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27 #define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ |
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28 #define ICMP_PARAMETERPROB 12 /* Parameter Problem */ |
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29 #define ICMP_TIMESTAMP 13 /* Timestamp Request */ |
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30 #define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */ |
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31 #define ICMP_INFO_REQUEST 15 /* Information Request */ |
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32 #define ICMP_INFO_REPLY 16 /* Information Reply */ |
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33 #define ICMP_ADDRESS 17 /* Address Mask Request */ |
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34 #define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */ |
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35 #define NR_ICMP_TYPES 18 |
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36 |
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37 |
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38 /* Codes for UNREACH. */ |
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39 #define ICMP_NET_UNREACH 0 /* Network Unreachable */ |
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40 #define ICMP_HOST_UNREACH 1 /* Host Unreachable */ |
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41 #define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */ |
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42 #define ICMP_PORT_UNREACH 3 /* Port Unreachable */ |
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43 #define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */ |
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44 #define ICMP_SR_FAILED 5 /* Source Route failed */ |
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45 #define ICMP_NET_UNKNOWN 6 |
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46 #define ICMP_HOST_UNKNOWN 7 |
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47 #define ICMP_HOST_ISOLATED 8 |
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48 #define ICMP_NET_ANO 9 |
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49 #define ICMP_HOST_ANO 10 |
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50 #define ICMP_NET_UNR_TOS 11 |
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51 #define ICMP_HOST_UNR_TOS 12 |
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52 #define ICMP_PKT_FILTERED 13 /* Packet filtered */ |
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53 #define ICMP_PREC_VIOLATION 14 /* Precedence violation */ |
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54 #define ICMP_PREC_CUTOFF 15 /* Precedence cut off */ |
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55 #define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */ |
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56 |
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57 /* Codes for REDIRECT. */ |
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58 #define ICMP_REDIR_NET 0 /* Redirect Net */ |
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59 #define ICMP_REDIR_HOST 1 /* Redirect Host */ |
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60 #define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */ |
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61 #define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */ |
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62 |
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63 /* Codes for TIME_EXCEEDED. */ |
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64 #define ICMP_EXC_TTL 0 /* TTL count exceeded */ |
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65 #define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */ |
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66 |
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67 |
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68 struct icmphdr { |
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69 __u8 type; |
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70 __u8 code; |
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71 __sum16 checksum; |
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72 union { |
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73 struct { |
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74 __be16 id; |
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75 __be16 sequence; |
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76 } echo; |
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77 __be32 gateway; |
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78 struct { |
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79 __be16 __unused; |
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80 __be16 mtu; |
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81 } frag; |
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82 } un; |
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83 }; |
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84 |
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85 #ifdef __KERNEL__ |
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86 #include <linux/skbuff.h> |
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87 |
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88 static inline struct icmphdr *icmp_hdr(const struct sk_buff *skb) |
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89 { |
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90 return (struct icmphdr *)skb_transport_header(skb); |
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91 } |
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92 #endif |
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93 |
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94 /* |
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95 * constants for (set|get)sockopt |
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96 */ |
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97 |
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98 #define ICMP_FILTER 1 |
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99 |
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100 struct icmp_filter { |
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101 __u32 data; |
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102 }; |
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103 |
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104 |
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105 #endif /* _LINUX_ICMP_H */ |