1 | #include <machine/rtems-bsd-user-space.h> |
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2 | |
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3 | /* |
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4 | * Redistribution and use in source and binary forms, with or without |
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5 | * modification, are permitted provided that: (1) source code |
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6 | * distributions retain the above copyright notice and this paragraph |
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7 | * in its entirety, and (2) distributions including binary code include |
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8 | * the above copyright notice and this paragraph in its entirety in |
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9 | * the documentation or other materials provided with the distribution. |
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10 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND |
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11 | * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT |
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12 | * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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13 | * FOR A PARTICULAR PURPOSE. |
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14 | * |
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15 | * Original code by Hannes Gredler (hannes@juniper.net) |
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16 | */ |
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17 | |
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18 | #ifndef lint |
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19 | static const char rcsid[] _U_ = |
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20 | "@(#) $Header: /tcpdump/master/tcpdump/print-bfd.c,v 1.10 2006-02-02 06:35:52 hannes Exp $"; |
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21 | #endif |
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22 | |
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23 | #ifdef HAVE_CONFIG_H |
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24 | #include "config.h" |
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25 | #endif |
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26 | |
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27 | #include <tcpdump-stdinc.h> |
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28 | |
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29 | #include <stdio.h> |
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30 | #include <stdlib.h> |
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31 | |
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32 | #include "interface.h" |
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33 | #include "extract.h" |
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34 | #include "addrtoname.h" |
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35 | |
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36 | #include "udp.h" |
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37 | |
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38 | /* |
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39 | * Control packet, BFDv0, draft-katz-ward-bfd-01.txt |
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40 | * |
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41 | * 0 1 2 3 |
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42 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
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43 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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44 | * |Vers | Diag |H|D|P|F| Rsvd | Detect Mult | Length | |
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45 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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46 | * | My Discriminator | |
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47 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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48 | * | Your Discriminator | |
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49 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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50 | * | Desired Min TX Interval | |
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51 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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52 | * | Required Min RX Interval | |
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53 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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54 | * | Required Min Echo RX Interval | |
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55 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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56 | */ |
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57 | |
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58 | /* |
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59 | * Control packet, BFDv1, draft-ietf-bfd-base-02.txt |
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60 | * |
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61 | * 0 1 2 3 |
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62 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
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63 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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64 | * |Vers | Diag |Sta|P|F|C|A|D|R| Detect Mult | Length | |
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65 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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66 | * | My Discriminator | |
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67 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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68 | * | Your Discriminator | |
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69 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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70 | * | Desired Min TX Interval | |
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71 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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72 | * | Required Min RX Interval | |
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73 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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74 | * | Required Min Echo RX Interval | |
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75 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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76 | */ |
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77 | |
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78 | struct bfd_header_t { |
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79 | u_int8_t version_diag; |
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80 | u_int8_t flags; |
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81 | u_int8_t detect_time_multiplier; |
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82 | u_int8_t length; |
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83 | u_int8_t my_discriminator[4]; |
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84 | u_int8_t your_discriminator[4]; |
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85 | u_int8_t desired_min_tx_interval[4]; |
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86 | u_int8_t required_min_rx_interval[4]; |
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87 | u_int8_t required_min_echo_interval[4]; |
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88 | }; |
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89 | |
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90 | /* |
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91 | * An optional Authentication Header may be present |
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92 | * |
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93 | * 0 1 2 3 |
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94 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
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95 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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96 | * | Auth Type | Auth Len | Authentication Data... | |
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97 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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98 | */ |
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99 | |
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100 | struct bfd_auth_header_t { |
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101 | u_int8_t auth_type; |
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102 | u_int8_t auth_len; |
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103 | u_int8_t auth_data; |
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104 | }; |
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105 | |
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106 | static const struct tok bfd_v1_authentication_values[] = { |
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107 | { 0, "Reserved" }, |
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108 | { 1, "Simple Password" }, |
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109 | { 2, "Keyed MD5" }, |
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110 | { 3, "Meticulous Keyed MD5" }, |
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111 | { 4, "Keyed SHA1" }, |
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112 | { 5, "Meticulous Keyed SHA1" }, |
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113 | { 0, NULL } |
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114 | }; |
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115 | |
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116 | #define BFD_EXTRACT_VERSION(x) (((x)&0xe0)>>5) |
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117 | #define BFD_EXTRACT_DIAG(x) ((x)&0x1f) |
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118 | |
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119 | static const struct tok bfd_port_values[] = { |
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120 | { BFD_CONTROL_PORT, "Control" }, |
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121 | { BFD_ECHO_PORT, "Echo" }, |
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122 | { 0, NULL } |
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123 | }; |
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124 | |
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125 | |
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126 | static const struct tok bfd_diag_values[] = { |
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127 | { 0, "No Diagnostic" }, |
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128 | { 1, "Control Detection Time Expired" }, |
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129 | { 2, "Echo Function Failed" }, |
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130 | { 3, "Neighbor Signaled Session Down" }, |
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131 | { 4, "Forwarding Plane Reset" }, |
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132 | { 5, "Path Down" }, |
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133 | { 6, "Concatenated Path Down" }, |
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134 | { 7, "Administratively Down" }, |
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135 | { 8, "Reverse Concatenated Path Down" }, |
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136 | { 0, NULL } |
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137 | }; |
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138 | |
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139 | static const struct tok bfd_v0_flag_values[] = { |
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140 | { 0x80, "I Hear You" }, |
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141 | { 0x40, "Demand" }, |
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142 | { 0x20, "Poll" }, |
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143 | { 0x10, "Final" }, |
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144 | { 0x08, "Reserved" }, |
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145 | { 0x04, "Reserved" }, |
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146 | { 0x02, "Reserved" }, |
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147 | { 0x01, "Reserved" }, |
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148 | { 0, NULL } |
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149 | }; |
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150 | |
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151 | #define BFD_FLAG_AUTH 0x04 |
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152 | |
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153 | static const struct tok bfd_v1_flag_values[] = { |
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154 | { 0x20, "Poll" }, |
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155 | { 0x10, "Final" }, |
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156 | { 0x08, "Control Plane Independent" }, |
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157 | { BFD_FLAG_AUTH, "Authentication Present" }, |
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158 | { 0x02, "Demand" }, |
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159 | { 0x01, "Reserved" }, |
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160 | { 0, NULL } |
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161 | }; |
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162 | |
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163 | static const struct tok bfd_v1_state_values[] = { |
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164 | { 0, "AdminDown" }, |
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165 | { 1, "Down" }, |
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166 | { 2, "Init" }, |
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167 | { 3, "Up" }, |
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168 | { 0, NULL } |
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169 | }; |
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170 | |
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171 | void |
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172 | bfd_print(register const u_char *pptr, register u_int len, register u_int port) |
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173 | { |
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174 | const struct bfd_header_t *bfd_header; |
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175 | const struct bfd_auth_header_t *bfd_auth_header; |
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176 | u_int8_t version = 0; |
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177 | |
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178 | bfd_header = (const struct bfd_header_t *)pptr; |
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179 | if (port == BFD_CONTROL_PORT) { |
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180 | TCHECK(*bfd_header); |
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181 | version = BFD_EXTRACT_VERSION(bfd_header->version_diag); |
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182 | } else if (port == BFD_ECHO_PORT) { |
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183 | /* Echo is BFD v1 only */ |
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184 | version = 1; |
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185 | } |
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186 | switch ((port << 8) | version) { |
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187 | |
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188 | /* BFDv0 */ |
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189 | case (BFD_CONTROL_PORT << 8): |
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190 | if (vflag < 1 ) |
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191 | { |
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192 | printf("BFDv%u, %s, Flags: [%s], length: %u", |
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193 | version, |
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194 | tok2str(bfd_port_values, "unknown (%u)", port), |
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195 | bittok2str(bfd_v0_flag_values, "none", bfd_header->flags), |
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196 | len); |
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197 | return; |
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198 | } |
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199 | |
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200 | printf("BFDv%u, length: %u\n\t%s, Flags: [%s], Diagnostic: %s (0x%02x)", |
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201 | version, |
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202 | len, |
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203 | tok2str(bfd_port_values, "unknown (%u)", port), |
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204 | bittok2str(bfd_v0_flag_values, "none", bfd_header->flags), |
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205 | tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(bfd_header->version_diag)), |
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206 | BFD_EXTRACT_DIAG(bfd_header->version_diag)); |
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207 | |
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208 | printf("\n\tDetection Timer Multiplier: %u (%u ms Detection time), BFD Length: %u", |
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209 | bfd_header->detect_time_multiplier, |
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210 | bfd_header->detect_time_multiplier * EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000, |
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211 | bfd_header->length); |
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212 | |
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213 | |
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214 | printf("\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator)); |
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215 | printf(", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator)); |
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216 | printf("\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000); |
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217 | printf("\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000); |
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218 | printf("\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000); |
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219 | break; |
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220 | |
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221 | /* BFDv1 */ |
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222 | case (BFD_CONTROL_PORT << 8 | 1): |
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223 | if (vflag < 1 ) |
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224 | { |
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225 | printf("BFDv%u, %s, State %s, Flags: [%s], length: %u", |
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226 | version, |
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227 | tok2str(bfd_port_values, "unknown (%u)", port), |
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228 | tok2str(bfd_v1_state_values, "unknown (%u)", (bfd_header->flags & 0xc0) >> 6), |
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229 | bittok2str(bfd_v1_flag_values, "none", bfd_header->flags & 0x3f), |
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230 | len); |
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231 | return; |
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232 | } |
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233 | |
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234 | printf("BFDv%u, length: %u\n\t%s, State %s, Flags: [%s], Diagnostic: %s (0x%02x)", |
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235 | version, |
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236 | len, |
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237 | tok2str(bfd_port_values, "unknown (%u)", port), |
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238 | tok2str(bfd_v1_state_values, "unknown (%u)", (bfd_header->flags & 0xc0) >> 6), |
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239 | bittok2str(bfd_v1_flag_values, "none", bfd_header->flags & 0x3f), |
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240 | tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(bfd_header->version_diag)), |
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241 | BFD_EXTRACT_DIAG(bfd_header->version_diag)); |
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242 | |
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243 | printf("\n\tDetection Timer Multiplier: %u (%u ms Detection time), BFD Length: %u", |
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244 | bfd_header->detect_time_multiplier, |
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245 | bfd_header->detect_time_multiplier * EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000, |
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246 | bfd_header->length); |
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247 | |
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248 | |
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249 | printf("\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator)); |
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250 | printf(", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator)); |
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251 | printf("\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000); |
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252 | printf("\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000); |
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253 | printf("\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000); |
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254 | |
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255 | if (bfd_header->flags & BFD_FLAG_AUTH) { |
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256 | pptr += sizeof (const struct bfd_header_t); |
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257 | bfd_auth_header = (const struct bfd_auth_header_t *)pptr; |
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258 | TCHECK2(*bfd_auth_header, sizeof(const struct bfd_auth_header_t)); |
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259 | printf("\n\t%s (%u) Authentication, length %u present", |
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260 | tok2str(bfd_v1_authentication_values,"Unknown",bfd_auth_header->auth_type), |
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261 | bfd_auth_header->auth_type, |
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262 | bfd_auth_header->auth_len); |
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263 | } |
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264 | break; |
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265 | |
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266 | /* BFDv0 */ |
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267 | case (BFD_ECHO_PORT << 8): /* not yet supported - fall through */ |
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268 | /* BFDv1 */ |
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269 | case (BFD_ECHO_PORT << 8 | 1): |
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270 | |
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271 | default: |
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272 | printf("BFD, %s, length: %u", |
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273 | tok2str(bfd_port_values, "unknown (%u)", port), |
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274 | len); |
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275 | if (vflag >= 1) { |
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276 | if(!print_unknown_data(pptr,"\n\t",len)) |
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277 | return; |
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278 | } |
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279 | break; |
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280 | } |
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281 | return; |
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282 | |
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283 | trunc: |
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284 | printf("[|BFD]"); |
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285 | } |
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