1 | #include <machine/rtems-bsd-user-space.h> |
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2 | |
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3 | /* |
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4 | * Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996 |
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5 | * The Regents of the University of California. All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms are permitted |
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8 | * provided that the above copyright notice and this paragraph are |
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9 | * duplicated in all such forms and that any documentation, |
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10 | * advertising materials, and other materials related to such |
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11 | * distribution and use acknowledge that the software was developed |
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12 | * by the University of California, Lawrence Berkeley Laboratory, |
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13 | * Berkeley, CA. The name of the University may not be used to |
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14 | * endorse or promote products derived from this software without |
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15 | * specific prior written permission. |
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16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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17 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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19 | * |
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20 | * Initial contribution from Jeff Honig (jch@MITCHELL.CIT.CORNELL.EDU). |
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21 | */ |
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22 | |
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23 | #ifndef lint |
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24 | static const char rcsid[] _U_ = |
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25 | "@(#) $Header: /tcpdump/master/tcpdump/print-egp.c,v 1.38 2006-02-11 22:13:24 hannes Exp $ (LBL)"; |
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26 | #endif |
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27 | |
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28 | #ifdef HAVE_CONFIG_H |
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29 | #include "config.h" |
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30 | #endif |
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31 | |
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32 | #include <tcpdump-stdinc.h> |
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33 | |
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34 | #include <stdio.h> |
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35 | |
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36 | #include "interface.h" |
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37 | #include "addrtoname.h" |
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38 | #include "extract.h" |
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39 | |
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40 | #include "ip.h" |
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41 | |
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42 | struct egp_packet { |
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43 | u_int8_t egp_version; |
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44 | #define EGP_VERSION 2 |
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45 | u_int8_t egp_type; |
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46 | #define EGPT_ACQUIRE 3 |
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47 | #define EGPT_REACH 5 |
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48 | #define EGPT_POLL 2 |
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49 | #define EGPT_UPDATE 1 |
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50 | #define EGPT_ERROR 8 |
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51 | u_int8_t egp_code; |
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52 | #define EGPC_REQUEST 0 |
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53 | #define EGPC_CONFIRM 1 |
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54 | #define EGPC_REFUSE 2 |
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55 | #define EGPC_CEASE 3 |
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56 | #define EGPC_CEASEACK 4 |
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57 | #define EGPC_HELLO 0 |
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58 | #define EGPC_HEARDU 1 |
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59 | u_int8_t egp_status; |
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60 | #define EGPS_UNSPEC 0 |
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61 | #define EGPS_ACTIVE 1 |
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62 | #define EGPS_PASSIVE 2 |
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63 | #define EGPS_NORES 3 |
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64 | #define EGPS_ADMIN 4 |
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65 | #define EGPS_GODOWN 5 |
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66 | #define EGPS_PARAM 6 |
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67 | #define EGPS_PROTO 7 |
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68 | #define EGPS_INDET 0 |
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69 | #define EGPS_UP 1 |
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70 | #define EGPS_DOWN 2 |
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71 | #define EGPS_UNSOL 0x80 |
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72 | u_int16_t egp_checksum; |
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73 | u_int16_t egp_as; |
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74 | u_int16_t egp_sequence; |
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75 | union { |
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76 | u_int16_t egpu_hello; |
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77 | u_int8_t egpu_gws[2]; |
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78 | u_int16_t egpu_reason; |
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79 | #define EGPR_UNSPEC 0 |
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80 | #define EGPR_BADHEAD 1 |
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81 | #define EGPR_BADDATA 2 |
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82 | #define EGPR_NOREACH 3 |
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83 | #define EGPR_XSPOLL 4 |
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84 | #define EGPR_NORESP 5 |
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85 | #define EGPR_UVERSION 6 |
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86 | } egp_handg; |
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87 | #define egp_hello egp_handg.egpu_hello |
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88 | #define egp_intgw egp_handg.egpu_gws[0] |
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89 | #define egp_extgw egp_handg.egpu_gws[1] |
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90 | #define egp_reason egp_handg.egpu_reason |
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91 | union { |
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92 | u_int16_t egpu_poll; |
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93 | u_int32_t egpu_sourcenet; |
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94 | } egp_pands; |
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95 | #define egp_poll egp_pands.egpu_poll |
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96 | #define egp_sourcenet egp_pands.egpu_sourcenet |
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97 | }; |
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98 | |
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99 | const char *egp_acquire_codes[] = { |
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100 | "request", |
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101 | "confirm", |
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102 | "refuse", |
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103 | "cease", |
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104 | "cease_ack" |
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105 | }; |
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106 | |
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107 | const char *egp_acquire_status[] = { |
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108 | "unspecified", |
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109 | "active_mode", |
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110 | "passive_mode", |
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111 | "insufficient_resources", |
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112 | "administratively_prohibited", |
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113 | "going_down", |
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114 | "parameter_violation", |
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115 | "protocol_violation" |
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116 | }; |
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117 | |
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118 | const char *egp_reach_codes[] = { |
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119 | "hello", |
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120 | "i-h-u" |
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121 | }; |
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122 | |
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123 | const char *egp_status_updown[] = { |
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124 | "indeterminate", |
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125 | "up", |
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126 | "down" |
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127 | }; |
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128 | |
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129 | const char *egp_reasons[] = { |
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130 | "unspecified", |
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131 | "bad_EGP_header_format", |
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132 | "bad_EGP_data_field_format", |
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133 | "reachability_info_unavailable", |
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134 | "excessive_polling_rate", |
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135 | "no_response", |
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136 | "unsupported_version" |
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137 | }; |
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138 | |
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139 | static void |
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140 | egpnrprint(register const struct egp_packet *egp) |
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141 | { |
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142 | register const u_int8_t *cp; |
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143 | u_int32_t addr; |
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144 | register u_int32_t net; |
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145 | register u_int netlen; |
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146 | int gateways, distances, networks; |
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147 | int t_gateways; |
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148 | const char *comma; |
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149 | |
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150 | addr = egp->egp_sourcenet; |
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151 | if (IN_CLASSA(addr)) { |
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152 | net = addr & IN_CLASSA_NET; |
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153 | netlen = 1; |
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154 | } else if (IN_CLASSB(addr)) { |
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155 | net = addr & IN_CLASSB_NET; |
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156 | netlen = 2; |
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157 | } else if (IN_CLASSC(addr)) { |
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158 | net = addr & IN_CLASSC_NET; |
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159 | netlen = 3; |
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160 | } else { |
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161 | net = 0; |
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162 | netlen = 0; |
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163 | } |
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164 | cp = (u_int8_t *)(egp + 1); |
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165 | |
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166 | t_gateways = egp->egp_intgw + egp->egp_extgw; |
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167 | for (gateways = 0; gateways < t_gateways; ++gateways) { |
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168 | /* Pickup host part of gateway address */ |
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169 | addr = 0; |
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170 | TCHECK2(cp[0], 4 - netlen); |
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171 | switch (netlen) { |
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172 | |
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173 | case 1: |
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174 | addr = *cp++; |
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175 | /* fall through */ |
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176 | case 2: |
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177 | addr = (addr << 8) | *cp++; |
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178 | /* fall through */ |
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179 | case 3: |
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180 | addr = (addr << 8) | *cp++; |
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181 | } |
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182 | addr |= net; |
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183 | TCHECK2(cp[0], 1); |
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184 | distances = *cp++; |
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185 | printf(" %s %s ", |
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186 | gateways < (int)egp->egp_intgw ? "int" : "ext", |
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187 | ipaddr_string(&addr)); |
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188 | |
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189 | comma = ""; |
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190 | putchar('('); |
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191 | while (--distances >= 0) { |
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192 | TCHECK2(cp[0], 2); |
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193 | printf("%sd%d:", comma, (int)*cp++); |
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194 | comma = ", "; |
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195 | networks = *cp++; |
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196 | while (--networks >= 0) { |
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197 | /* Pickup network number */ |
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198 | TCHECK2(cp[0], 1); |
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199 | addr = (u_int32_t)*cp++ << 24; |
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200 | if (IN_CLASSB(addr)) { |
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201 | TCHECK2(cp[0], 1); |
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202 | addr |= (u_int32_t)*cp++ << 16; |
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203 | } else if (!IN_CLASSA(addr)) { |
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204 | TCHECK2(cp[0], 2); |
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205 | addr |= (u_int32_t)*cp++ << 16; |
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206 | addr |= (u_int32_t)*cp++ << 8; |
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207 | } |
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208 | printf(" %s", ipaddr_string(&addr)); |
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209 | } |
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210 | } |
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211 | putchar(')'); |
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212 | } |
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213 | return; |
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214 | trunc: |
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215 | fputs("[|]", stdout); |
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216 | } |
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217 | |
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218 | void |
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219 | egp_print(register const u_int8_t *bp, register u_int length) |
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220 | { |
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221 | register const struct egp_packet *egp; |
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222 | register int status; |
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223 | register int code; |
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224 | register int type; |
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225 | |
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226 | egp = (struct egp_packet *)bp; |
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227 | if (!TTEST2(*egp, length)) { |
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228 | printf("[|egp]"); |
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229 | return; |
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230 | } |
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231 | |
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232 | if (!vflag) { |
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233 | printf("EGPv%u, AS %u, seq %u, length %u", |
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234 | egp->egp_version, |
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235 | EXTRACT_16BITS(&egp->egp_as), |
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236 | EXTRACT_16BITS(&egp->egp_sequence), |
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237 | length); |
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238 | return; |
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239 | } else |
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240 | printf("EGPv%u, length %u", |
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241 | egp->egp_version, |
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242 | length); |
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243 | |
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244 | if (egp->egp_version != EGP_VERSION) { |
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245 | printf("[version %d]", egp->egp_version); |
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246 | return; |
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247 | } |
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248 | |
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249 | type = egp->egp_type; |
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250 | code = egp->egp_code; |
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251 | status = egp->egp_status; |
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252 | |
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253 | switch (type) { |
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254 | case EGPT_ACQUIRE: |
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255 | printf(" acquire"); |
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256 | switch (code) { |
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257 | case EGPC_REQUEST: |
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258 | case EGPC_CONFIRM: |
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259 | printf(" %s", egp_acquire_codes[code]); |
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260 | switch (status) { |
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261 | case EGPS_UNSPEC: |
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262 | case EGPS_ACTIVE: |
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263 | case EGPS_PASSIVE: |
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264 | printf(" %s", egp_acquire_status[status]); |
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265 | break; |
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266 | |
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267 | default: |
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268 | printf(" [status %d]", status); |
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269 | break; |
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270 | } |
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271 | printf(" hello:%d poll:%d", |
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272 | EXTRACT_16BITS(&egp->egp_hello), |
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273 | EXTRACT_16BITS(&egp->egp_poll)); |
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274 | break; |
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275 | |
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276 | case EGPC_REFUSE: |
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277 | case EGPC_CEASE: |
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278 | case EGPC_CEASEACK: |
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279 | printf(" %s", egp_acquire_codes[code]); |
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280 | switch (status ) { |
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281 | case EGPS_UNSPEC: |
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282 | case EGPS_NORES: |
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283 | case EGPS_ADMIN: |
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284 | case EGPS_GODOWN: |
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285 | case EGPS_PARAM: |
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286 | case EGPS_PROTO: |
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287 | printf(" %s", egp_acquire_status[status]); |
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288 | break; |
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289 | |
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290 | default: |
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291 | printf("[status %d]", status); |
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292 | break; |
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293 | } |
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294 | break; |
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295 | |
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296 | default: |
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297 | printf("[code %d]", code); |
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298 | break; |
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299 | } |
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300 | break; |
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301 | |
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302 | case EGPT_REACH: |
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303 | switch (code) { |
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304 | |
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305 | case EGPC_HELLO: |
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306 | case EGPC_HEARDU: |
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307 | printf(" %s", egp_reach_codes[code]); |
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308 | if (status <= EGPS_DOWN) |
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309 | printf(" state:%s", egp_status_updown[status]); |
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310 | else |
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311 | printf(" [status %d]", status); |
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312 | break; |
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313 | |
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314 | default: |
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315 | printf("[reach code %d]", code); |
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316 | break; |
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317 | } |
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318 | break; |
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319 | |
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320 | case EGPT_POLL: |
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321 | printf(" poll"); |
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322 | if (egp->egp_status <= EGPS_DOWN) |
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323 | printf(" state:%s", egp_status_updown[status]); |
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324 | else |
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325 | printf(" [status %d]", status); |
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326 | printf(" net:%s", ipaddr_string(&egp->egp_sourcenet)); |
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327 | break; |
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328 | |
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329 | case EGPT_UPDATE: |
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330 | printf(" update"); |
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331 | if (status & EGPS_UNSOL) { |
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332 | status &= ~EGPS_UNSOL; |
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333 | printf(" unsolicited"); |
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334 | } |
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335 | if (status <= EGPS_DOWN) |
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336 | printf(" state:%s", egp_status_updown[status]); |
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337 | else |
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338 | printf(" [status %d]", status); |
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339 | printf(" %s int %d ext %d", |
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340 | ipaddr_string(&egp->egp_sourcenet), |
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341 | egp->egp_intgw, |
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342 | egp->egp_extgw); |
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343 | if (vflag) |
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344 | egpnrprint(egp); |
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345 | break; |
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346 | |
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347 | case EGPT_ERROR: |
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348 | printf(" error"); |
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349 | if (status <= EGPS_DOWN) |
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350 | printf(" state:%s", egp_status_updown[status]); |
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351 | else |
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352 | printf(" [status %d]", status); |
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353 | |
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354 | if (EXTRACT_16BITS(&egp->egp_reason) <= EGPR_UVERSION) |
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355 | printf(" %s", egp_reasons[EXTRACT_16BITS(&egp->egp_reason)]); |
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356 | else |
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357 | printf(" [reason %d]", EXTRACT_16BITS(&egp->egp_reason)); |
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358 | break; |
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359 | |
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360 | default: |
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361 | printf("[type %d]", type); |
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362 | break; |
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363 | } |
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364 | } |
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