The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Redistribution and use in source and binary forms, with or without |
| 3 | * modification, are permitted provided that: (1) source code |
| 4 | * distributions retain the above copyright notice and this paragraph |
| 5 | * in its entirety, and (2) distributions including binary code include |
| 6 | * the above copyright notice and this paragraph in its entirety in |
| 7 | * the documentation or other materials provided with the distribution. |
| 8 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND |
| 9 | * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT |
| 10 | * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 11 | * FOR A PARTICULAR PURPOSE. |
| 12 | * |
| 13 | * Original code by Hannes Gredler (hannes@juniper.net) |
| 14 | */ |
| 15 | |
| 16 | #ifndef lint |
| 17 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 18 | "@(#) $Header: /tcpdump/master/tcpdump/print-bfd.c,v 1.10 2006-02-02 06:35:52 hannes Exp $"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 19 | #endif |
| 20 | |
| 21 | #ifdef HAVE_CONFIG_H |
| 22 | #include "config.h" |
| 23 | #endif |
| 24 | |
| 25 | #include <tcpdump-stdinc.h> |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | #include <stdlib.h> |
| 29 | |
| 30 | #include "interface.h" |
| 31 | #include "extract.h" |
| 32 | #include "addrtoname.h" |
| 33 | |
| 34 | #include "udp.h" |
| 35 | |
| 36 | /* |
| 37 | * Control packet, BFDv0, draft-katz-ward-bfd-01.txt |
| 38 | * |
| 39 | * 0 1 2 3 |
| 40 | * 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 |
| 41 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 42 | * |Vers | Diag |H|D|P|F| Rsvd | Detect Mult | Length | |
| 43 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 44 | * | My Discriminator | |
| 45 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 46 | * | Your Discriminator | |
| 47 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 48 | * | Desired Min TX Interval | |
| 49 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 50 | * | Required Min RX Interval | |
| 51 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 52 | * | Required Min Echo RX Interval | |
| 53 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 54 | */ |
| 55 | |
| 56 | /* |
| 57 | * Control packet, BFDv1, draft-ietf-bfd-base-02.txt |
| 58 | * |
| 59 | * 0 1 2 3 |
| 60 | * 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 |
| 61 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 62 | * |Vers | Diag |Sta|P|F|C|A|D|R| Detect Mult | Length | |
| 63 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 64 | * | My Discriminator | |
| 65 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 66 | * | Your Discriminator | |
| 67 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 68 | * | Desired Min TX Interval | |
| 69 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 70 | * | Required Min RX Interval | |
| 71 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 72 | * | Required Min Echo RX Interval | |
| 73 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 74 | */ |
| 75 | |
| 76 | struct bfd_header_t { |
| 77 | u_int8_t version_diag; |
| 78 | u_int8_t flags; |
| 79 | u_int8_t detect_time_multiplier; |
| 80 | u_int8_t length; |
| 81 | u_int8_t my_discriminator[4]; |
| 82 | u_int8_t your_discriminator[4]; |
| 83 | u_int8_t desired_min_tx_interval[4]; |
| 84 | u_int8_t required_min_rx_interval[4]; |
| 85 | u_int8_t required_min_echo_interval[4]; |
| 86 | }; |
| 87 | |
| 88 | /* |
| 89 | * An optional Authentication Header may be present |
| 90 | * |
| 91 | * 0 1 2 3 |
| 92 | * 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 |
| 93 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 94 | * | Auth Type | Auth Len | Authentication Data... | |
| 95 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 96 | */ |
| 97 | |
| 98 | struct bfd_auth_header_t { |
| 99 | u_int8_t auth_type; |
| 100 | u_int8_t auth_len; |
| 101 | u_int8_t auth_data; |
| 102 | }; |
| 103 | |
| 104 | static const struct tok bfd_v1_authentication_values[] = { |
| 105 | { 0, "Reserved" }, |
| 106 | { 1, "Simple Password" }, |
| 107 | { 2, "Keyed MD5" }, |
| 108 | { 3, "Meticulous Keyed MD5" }, |
| 109 | { 4, "Keyed SHA1" }, |
| 110 | { 5, "Meticulous Keyed SHA1" }, |
| 111 | { 0, NULL } |
| 112 | }; |
| 113 | |
| 114 | #define BFD_EXTRACT_VERSION(x) (((x)&0xe0)>>5) |
| 115 | #define BFD_EXTRACT_DIAG(x) ((x)&0x1f) |
| 116 | |
| 117 | static const struct tok bfd_port_values[] = { |
| 118 | { BFD_CONTROL_PORT, "Control" }, |
| 119 | { BFD_ECHO_PORT, "Echo" }, |
| 120 | { 0, NULL } |
| 121 | }; |
| 122 | |
| 123 | |
| 124 | static const struct tok bfd_diag_values[] = { |
| 125 | { 0, "No Diagnostic" }, |
| 126 | { 1, "Control Detection Time Expired" }, |
| 127 | { 2, "Echo Function Failed" }, |
| 128 | { 3, "Neighbor Signaled Session Down" }, |
| 129 | { 4, "Forwarding Plane Reset" }, |
| 130 | { 5, "Path Down" }, |
| 131 | { 6, "Concatenated Path Down" }, |
| 132 | { 7, "Administratively Down" }, |
| 133 | { 8, "Reverse Concatenated Path Down" }, |
| 134 | { 0, NULL } |
| 135 | }; |
| 136 | |
| 137 | static const struct tok bfd_v0_flag_values[] = { |
| 138 | { 0x80, "I Hear You" }, |
| 139 | { 0x40, "Demand" }, |
| 140 | { 0x20, "Poll" }, |
| 141 | { 0x10, "Final" }, |
| 142 | { 0x08, "Reserved" }, |
| 143 | { 0x04, "Reserved" }, |
| 144 | { 0x02, "Reserved" }, |
| 145 | { 0x01, "Reserved" }, |
| 146 | { 0, NULL } |
| 147 | }; |
| 148 | |
| 149 | #define BFD_FLAG_AUTH 0x04 |
| 150 | |
| 151 | static const struct tok bfd_v1_flag_values[] = { |
| 152 | { 0x20, "Poll" }, |
| 153 | { 0x10, "Final" }, |
| 154 | { 0x08, "Control Plane Independent" }, |
| 155 | { BFD_FLAG_AUTH, "Authentication Present" }, |
| 156 | { 0x02, "Demand" }, |
| 157 | { 0x01, "Reserved" }, |
| 158 | { 0, NULL } |
| 159 | }; |
| 160 | |
| 161 | static const struct tok bfd_v1_state_values[] = { |
| 162 | { 0, "AdminDown" }, |
| 163 | { 1, "Down" }, |
| 164 | { 2, "Init" }, |
| 165 | { 3, "Up" }, |
| 166 | { 0, NULL } |
| 167 | }; |
| 168 | |
| 169 | void |
| 170 | bfd_print(register const u_char *pptr, register u_int len, register u_int port) |
| 171 | { |
| 172 | const struct bfd_header_t *bfd_header; |
| 173 | const struct bfd_auth_header_t *bfd_auth_header; |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 174 | u_int8_t version = 0; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 175 | |
| 176 | bfd_header = (const struct bfd_header_t *)pptr; |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 177 | if (port == BFD_CONTROL_PORT) { |
| 178 | TCHECK(*bfd_header); |
| 179 | version = BFD_EXTRACT_VERSION(bfd_header->version_diag); |
| 180 | } else if (port == BFD_ECHO_PORT) { |
| 181 | /* Echo is BFD v1 only */ |
| 182 | version = 1; |
| 183 | } |
| 184 | switch ((port << 8) | version) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 185 | |
| 186 | /* BFDv0 */ |
| 187 | case (BFD_CONTROL_PORT << 8): |
| 188 | if (vflag < 1 ) |
| 189 | { |
| 190 | printf("BFDv%u, %s, Flags: [%s], length: %u", |
| 191 | version, |
| 192 | tok2str(bfd_port_values, "unknown (%u)", port), |
| 193 | bittok2str(bfd_v0_flag_values, "none", bfd_header->flags), |
| 194 | len); |
| 195 | return; |
| 196 | } |
| 197 | |
| 198 | printf("BFDv%u, length: %u\n\t%s, Flags: [%s], Diagnostic: %s (0x%02x)", |
| 199 | version, |
| 200 | len, |
| 201 | tok2str(bfd_port_values, "unknown (%u)", port), |
| 202 | bittok2str(bfd_v0_flag_values, "none", bfd_header->flags), |
| 203 | tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(bfd_header->version_diag)), |
| 204 | BFD_EXTRACT_DIAG(bfd_header->version_diag)); |
| 205 | |
| 206 | printf("\n\tDetection Timer Multiplier: %u (%u ms Detection time), BFD Length: %u", |
| 207 | bfd_header->detect_time_multiplier, |
| 208 | bfd_header->detect_time_multiplier * EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000, |
| 209 | bfd_header->length); |
| 210 | |
| 211 | |
| 212 | printf("\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator)); |
| 213 | printf(", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator)); |
| 214 | printf("\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000); |
| 215 | printf("\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000); |
| 216 | printf("\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000); |
| 217 | break; |
| 218 | |
| 219 | /* BFDv1 */ |
| 220 | case (BFD_CONTROL_PORT << 8 | 1): |
| 221 | if (vflag < 1 ) |
| 222 | { |
| 223 | printf("BFDv%u, %s, State %s, Flags: [%s], length: %u", |
| 224 | version, |
| 225 | tok2str(bfd_port_values, "unknown (%u)", port), |
| 226 | tok2str(bfd_v1_state_values, "unknown (%u)", (bfd_header->flags & 0xc0) >> 6), |
| 227 | bittok2str(bfd_v1_flag_values, "none", bfd_header->flags & 0x3f), |
| 228 | len); |
| 229 | return; |
| 230 | } |
| 231 | |
| 232 | printf("BFDv%u, length: %u\n\t%s, State %s, Flags: [%s], Diagnostic: %s (0x%02x)", |
| 233 | version, |
| 234 | len, |
| 235 | tok2str(bfd_port_values, "unknown (%u)", port), |
| 236 | tok2str(bfd_v1_state_values, "unknown (%u)", (bfd_header->flags & 0xc0) >> 6), |
| 237 | bittok2str(bfd_v1_flag_values, "none", bfd_header->flags & 0x3f), |
| 238 | tok2str(bfd_diag_values,"unknown",BFD_EXTRACT_DIAG(bfd_header->version_diag)), |
| 239 | BFD_EXTRACT_DIAG(bfd_header->version_diag)); |
| 240 | |
| 241 | printf("\n\tDetection Timer Multiplier: %u (%u ms Detection time), BFD Length: %u", |
| 242 | bfd_header->detect_time_multiplier, |
| 243 | bfd_header->detect_time_multiplier * EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000, |
| 244 | bfd_header->length); |
| 245 | |
| 246 | |
| 247 | printf("\n\tMy Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->my_discriminator)); |
| 248 | printf(", Your Discriminator: 0x%08x", EXTRACT_32BITS(bfd_header->your_discriminator)); |
| 249 | printf("\n\t Desired min Tx Interval: %4u ms", EXTRACT_32BITS(bfd_header->desired_min_tx_interval)/1000); |
| 250 | printf("\n\t Required min Rx Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_rx_interval)/1000); |
| 251 | printf("\n\t Required min Echo Interval: %4u ms", EXTRACT_32BITS(bfd_header->required_min_echo_interval)/1000); |
| 252 | |
| 253 | if (bfd_header->flags & BFD_FLAG_AUTH) { |
| 254 | pptr += sizeof (const struct bfd_header_t); |
| 255 | bfd_auth_header = (const struct bfd_auth_header_t *)pptr; |
| 256 | TCHECK2(*bfd_auth_header, sizeof(const struct bfd_auth_header_t)); |
| 257 | printf("\n\t%s (%u) Authentication, length %u present", |
| 258 | tok2str(bfd_v1_authentication_values,"Unknown",bfd_auth_header->auth_type), |
| 259 | bfd_auth_header->auth_type, |
| 260 | bfd_auth_header->auth_len); |
| 261 | } |
| 262 | break; |
| 263 | |
| 264 | /* BFDv0 */ |
| 265 | case (BFD_ECHO_PORT << 8): /* not yet supported - fall through */ |
| 266 | /* BFDv1 */ |
| 267 | case (BFD_ECHO_PORT << 8 | 1): |
| 268 | |
| 269 | default: |
| 270 | printf("BFD, %s, length: %u", |
| 271 | tok2str(bfd_port_values, "unknown (%u)", port), |
| 272 | len); |
| 273 | if (vflag >= 1) { |
| 274 | if(!print_unknown_data(pptr,"\n\t",len)) |
| 275 | return; |
| 276 | } |
| 277 | break; |
| 278 | } |
| 279 | return; |
| 280 | |
| 281 | trunc: |
| 282 | printf("[|BFD]"); |
| 283 | } |