1 | /* |
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2 | * Copyright (c) 1982, 1986, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | * |
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33 | * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93 |
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34 | * $Id$ |
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35 | */ |
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36 | |
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37 | #ifndef _NETINET_IP_ICMP_H_ |
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38 | #define _NETINET_IP_ICMP_H_ |
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39 | |
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40 | /* |
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41 | * Interface Control Message Protocol Definitions. |
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42 | * Per RFC 792, September 1981. |
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43 | */ |
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44 | |
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45 | /* |
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46 | * Internal of an ICMP Router Advertisement |
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47 | */ |
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48 | struct icmp_ra_addr { |
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49 | u_int32_t ira_addr; |
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50 | u_int32_t ira_preference; |
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51 | }; |
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52 | |
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53 | /* |
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54 | * Structure of an icmp header. |
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55 | */ |
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56 | struct icmp { |
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57 | u_char icmp_type; /* type of message, see below */ |
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58 | u_char icmp_code; /* type sub code */ |
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59 | u_short icmp_cksum; /* ones complement cksum of struct */ |
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60 | union { |
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61 | u_char ih_pptr; /* ICMP_PARAMPROB */ |
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62 | struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ |
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63 | struct ih_idseq { |
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64 | n_short icd_id; |
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65 | n_short icd_seq; |
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66 | } ih_idseq; |
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67 | int ih_void; |
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68 | |
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69 | /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ |
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70 | struct ih_pmtu { |
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71 | n_short ipm_void; |
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72 | n_short ipm_nextmtu; |
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73 | } ih_pmtu; |
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74 | |
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75 | struct ih_rtradv { |
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76 | u_char irt_num_addrs; |
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77 | u_char irt_wpa; |
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78 | u_int16_t irt_lifetime; |
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79 | } ih_rtradv; |
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80 | } icmp_hun; |
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81 | #define icmp_pptr icmp_hun.ih_pptr |
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82 | #define icmp_gwaddr icmp_hun.ih_gwaddr |
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83 | #define icmp_id icmp_hun.ih_idseq.icd_id |
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84 | #define icmp_seq icmp_hun.ih_idseq.icd_seq |
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85 | #define icmp_void icmp_hun.ih_void |
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86 | #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void |
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87 | #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu |
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88 | #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs |
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89 | #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa |
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90 | #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime |
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91 | union { |
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92 | struct id_ts { |
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93 | n_time its_otime; |
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94 | n_time its_rtime; |
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95 | n_time its_ttime; |
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96 | } id_ts; |
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97 | struct id_ip { |
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98 | struct ip idi_ip; |
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99 | /* options and then 64 bits of data */ |
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100 | } id_ip; |
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101 | struct icmp_ra_addr id_radv; |
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102 | u_long id_mask; |
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103 | char id_data[1]; |
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104 | } icmp_dun; |
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105 | #define icmp_otime icmp_dun.id_ts.its_otime |
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106 | #define icmp_rtime icmp_dun.id_ts.its_rtime |
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107 | #define icmp_ttime icmp_dun.id_ts.its_ttime |
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108 | #define icmp_ip icmp_dun.id_ip.idi_ip |
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109 | #define icmp_radv icmp_dun.id_radv |
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110 | #define icmp_mask icmp_dun.id_mask |
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111 | #define icmp_data icmp_dun.id_data |
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112 | }; |
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113 | |
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114 | /* |
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115 | * Lower bounds on packet lengths for various types. |
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116 | * For the error advice packets must first insure that the |
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117 | * packet is large enough to contain the returned ip header. |
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118 | * Only then can we do the check to see if 64 bits of packet |
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119 | * data have been returned, since we need to check the returned |
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120 | * ip header length. |
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121 | */ |
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122 | #define ICMP_MINLEN 8 /* abs minimum */ |
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123 | #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ |
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124 | #define ICMP_MASKLEN 12 /* address mask */ |
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125 | #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ |
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126 | #ifndef _IP_VHL |
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127 | #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) |
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128 | /* N.B.: must separately check that ip_hl >= 5 */ |
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129 | #else |
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130 | #define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8) |
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131 | /* N.B.: must separately check that header length >= 5 */ |
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132 | #endif |
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133 | |
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134 | /* |
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135 | * Definition of type and code field values. |
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136 | */ |
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137 | #define ICMP_ECHOREPLY 0 /* echo reply */ |
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138 | #define ICMP_UNREACH 3 /* dest unreachable, codes: */ |
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139 | #define ICMP_UNREACH_NET 0 /* bad net */ |
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140 | #define ICMP_UNREACH_HOST 1 /* bad host */ |
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141 | #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ |
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142 | #define ICMP_UNREACH_PORT 3 /* bad port */ |
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143 | #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ |
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144 | #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ |
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145 | #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ |
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146 | #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ |
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147 | #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ |
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148 | #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ |
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149 | #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ |
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150 | #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ |
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151 | #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ |
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152 | #define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */ |
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153 | #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */ |
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154 | #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */ |
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155 | #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ |
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156 | #define ICMP_REDIRECT 5 /* shorter route, codes: */ |
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157 | #define ICMP_REDIRECT_NET 0 /* for network */ |
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158 | #define ICMP_REDIRECT_HOST 1 /* for host */ |
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159 | #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ |
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160 | #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ |
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161 | #define ICMP_ECHO 8 /* echo service */ |
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162 | #define ICMP_ROUTERADVERT 9 /* router advertisement */ |
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163 | #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ |
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164 | #define ICMP_TIMXCEED 11 /* time exceeded, code: */ |
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165 | #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ |
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166 | #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ |
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167 | #define ICMP_PARAMPROB 12 /* ip header bad */ |
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168 | #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ |
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169 | #define ICMP_TSTAMP 13 /* timestamp request */ |
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170 | #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ |
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171 | #define ICMP_IREQ 15 /* information request */ |
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172 | #define ICMP_IREQREPLY 16 /* information reply */ |
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173 | #define ICMP_MASKREQ 17 /* address mask request */ |
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174 | #define ICMP_MASKREPLY 18 /* address mask reply */ |
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175 | |
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176 | #define ICMP_MAXTYPE 18 |
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177 | |
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178 | #define ICMP_INFOTYPE(type) \ |
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179 | ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ |
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180 | (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ |
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181 | (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ |
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182 | (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ |
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183 | (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) |
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184 | |
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185 | #ifdef KERNEL |
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186 | void icmp_error __P((struct mbuf *, int, int, n_long, struct ifnet *)); |
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187 | void icmp_input __P((struct mbuf *, int)); |
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188 | #endif |
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189 | |
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190 | #endif |
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