1 ip_icmp.h |
1 /* IP_ICMP.H |
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2 * |
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3 * Portions copyright (c) 1997-1999 Symbian Ltd. All rights reserved. |
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4 */ |
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5 |
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6 /** @file |
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7 @publishedAll |
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8 @released |
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9 */ |
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10 |
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11 /* |
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12 * Copyright (c) 1982, 1986 Regents of the University of California. |
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13 * All rights reserved. |
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14 * |
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15 * Redistribution and use in source and binary forms are permitted |
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16 * provided that this notice is preserved and that due credit is given |
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17 * to the University of California at Berkeley. The name of the University |
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18 * may not be used to endorse or promote products derived from this |
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19 * software without specific prior written permission. This software |
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20 * is provided ``as is'' without express or implied warranty. |
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21 */ |
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22 |
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23 /* |
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24 * Interface Control Message Protocol Definitions. |
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25 * Per RFC 792, September 1981. |
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26 */ |
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27 |
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28 #ifndef _NETINET_IP_ICMP_H |
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29 #define _NETINET_IP_ICMP_H |
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30 |
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31 #include <libc\netinet\net_types.h> |
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32 #include <libc\netinet\in.h> |
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33 #include <libc\netinet\ip.h> |
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34 |
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35 #ifdef __cplusplus |
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36 extern "C" { |
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37 #endif |
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38 |
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39 /** |
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40 Structure of an icmp header. |
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41 */ |
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42 struct icmp { |
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43 u_char icmp_type; /* type of message, see below */ |
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44 u_char icmp_code; /* type sub code */ |
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45 u_short icmp_cksum; /* ones complement cksum of struct */ |
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46 union { |
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47 u_char ih_pptr; /* ICMP_PARAMPROB */ |
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48 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ |
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49 struct ih_idseq { |
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50 n_short icd_id; |
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51 n_short icd_seq; |
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52 } ih_idseq; |
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53 int ih_void; |
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54 } icmp_hun; |
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55 #define icmp_pptr icmp_hun.ih_pptr |
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56 #define icmp_gwaddr icmp_hun.ih_gwaddr |
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57 #define icmp_id icmp_hun.ih_idseq.icd_id |
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58 #define icmp_seq icmp_hun.ih_idseq.icd_seq |
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59 #define icmp_void icmp_hun.ih_void |
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60 union { |
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61 struct id_ts { |
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62 n_time its_otime; |
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63 n_time its_rtime; |
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64 n_time its_ttime; |
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65 } id_ts; |
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66 struct id_ip { |
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67 struct ip idi_ip; |
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68 /* options and then 64 bits of data */ |
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69 } id_ip; |
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70 u_long id_mask; |
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71 char id_data[1]; |
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72 } icmp_dun; |
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73 #define icmp_otime icmp_dun.id_ts.its_otime |
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74 #define icmp_rtime icmp_dun.id_ts.its_rtime |
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75 #define icmp_ttime icmp_dun.id_ts.its_ttime |
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76 #define icmp_ip icmp_dun.id_ip.idi_ip |
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77 #define icmp_mask icmp_dun.id_mask |
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78 #define icmp_data icmp_dun.id_data |
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79 }; |
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80 |
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81 /** |
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82 Lower bounds on packet lengths for various types. |
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83 For the error advice packets must first insure that the |
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84 packet is large enought to contain the returned ip header. |
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85 Only then can we do the check to see if 64 bits of packet |
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86 data have been returned, since we need to check the returned |
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87 ip header length. |
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88 */ |
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89 #define ICMP_MINLEN 8 /* abs minimum */ |
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90 #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ |
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91 #define ICMP_MASKLEN 12 /* address mask */ |
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92 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ |
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93 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) |
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94 /* N.B.: must separately check that ip_hl >= 5 */ |
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95 |
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96 /** |
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97 Definition of type and code field values. |
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98 */ |
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99 #define ICMP_ECHOREPLY 0 /* echo reply */ |
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100 #define ICMP_UNREACH 3 /* dest unreachable, codes: */ |
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101 #define ICMP_UNREACH_NET 0 /* bad net */ |
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102 #define ICMP_UNREACH_HOST 1 /* bad host */ |
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103 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ |
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104 #define ICMP_UNREACH_PORT 3 /* bad port */ |
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105 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ |
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106 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ |
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107 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ |
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108 #define ICMP_REDIRECT 5 /* shorter route, codes: */ |
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109 #define ICMP_REDIRECT_NET 0 /* for network */ |
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110 #define ICMP_REDIRECT_HOST 1 /* for host */ |
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111 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ |
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112 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ |
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113 #define ICMP_ECHO 8 /* echo service */ |
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114 #define ICMP_TIMXCEED 11 /* time exceeded, code: */ |
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115 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ |
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116 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ |
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117 #define ICMP_PARAMPROB 12 /* ip header bad */ |
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118 #define ICMP_TSTAMP 13 /* timestamp request */ |
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119 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ |
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120 #define ICMP_IREQ 15 /* information request */ |
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121 #define ICMP_IREQREPLY 16 /* information reply */ |
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122 #define ICMP_MASKREQ 17 /* address mask request */ |
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123 #define ICMP_MASKREPLY 18 /* address mask reply */ |
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124 #define ICMP_MAXTYPE 18 |
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125 |
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126 #define ICMP_INFOTYPE(type) \ |
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127 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ |
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128 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ |
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129 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ |
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130 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) |
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131 |
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132 #ifdef __cplusplus |
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133 } |
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134 #endif |
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135 |
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136 #endif /* _NETINET_IP_ICMP_H */ |