The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are permitted |
| 6 | * provided that the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, |
| 8 | * advertising materials, and other materials related to such |
| 9 | * distribution and use acknowledge that the software was developed |
| 10 | * by the University of California, Lawrence Berkeley Laboratory, |
| 11 | * Berkeley, CA. The name of the University may not be used to |
| 12 | * endorse or promote products derived from this software without |
| 13 | * specific prior written permission. |
| 14 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 15 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 16 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 17 | * |
| 18 | * Initial contribution from Jeff Honig (jch@MITCHELL.CIT.CORNELL.EDU). |
| 19 | */ |
| 20 | |
| 21 | #ifndef lint |
| 22 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 23 | "@(#) $Header: /tcpdump/master/tcpdump/print-egp.c,v 1.38 2006-02-11 22:13:24 hannes Exp $ (LBL)"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 24 | #endif |
| 25 | |
| 26 | #ifdef HAVE_CONFIG_H |
| 27 | #include "config.h" |
| 28 | #endif |
| 29 | |
| 30 | #include <tcpdump-stdinc.h> |
| 31 | |
| 32 | #include <stdio.h> |
| 33 | |
| 34 | #include "interface.h" |
| 35 | #include "addrtoname.h" |
| 36 | #include "extract.h" |
| 37 | |
| 38 | #include "ip.h" |
| 39 | |
| 40 | struct egp_packet { |
| 41 | u_int8_t egp_version; |
| 42 | #define EGP_VERSION 2 |
| 43 | u_int8_t egp_type; |
| 44 | #define EGPT_ACQUIRE 3 |
| 45 | #define EGPT_REACH 5 |
| 46 | #define EGPT_POLL 2 |
| 47 | #define EGPT_UPDATE 1 |
| 48 | #define EGPT_ERROR 8 |
| 49 | u_int8_t egp_code; |
| 50 | #define EGPC_REQUEST 0 |
| 51 | #define EGPC_CONFIRM 1 |
| 52 | #define EGPC_REFUSE 2 |
| 53 | #define EGPC_CEASE 3 |
| 54 | #define EGPC_CEASEACK 4 |
| 55 | #define EGPC_HELLO 0 |
| 56 | #define EGPC_HEARDU 1 |
| 57 | u_int8_t egp_status; |
| 58 | #define EGPS_UNSPEC 0 |
| 59 | #define EGPS_ACTIVE 1 |
| 60 | #define EGPS_PASSIVE 2 |
| 61 | #define EGPS_NORES 3 |
| 62 | #define EGPS_ADMIN 4 |
| 63 | #define EGPS_GODOWN 5 |
| 64 | #define EGPS_PARAM 6 |
| 65 | #define EGPS_PROTO 7 |
| 66 | #define EGPS_INDET 0 |
| 67 | #define EGPS_UP 1 |
| 68 | #define EGPS_DOWN 2 |
| 69 | #define EGPS_UNSOL 0x80 |
| 70 | u_int16_t egp_checksum; |
| 71 | u_int16_t egp_as; |
| 72 | u_int16_t egp_sequence; |
| 73 | union { |
| 74 | u_int16_t egpu_hello; |
| 75 | u_int8_t egpu_gws[2]; |
| 76 | u_int16_t egpu_reason; |
| 77 | #define EGPR_UNSPEC 0 |
| 78 | #define EGPR_BADHEAD 1 |
| 79 | #define EGPR_BADDATA 2 |
| 80 | #define EGPR_NOREACH 3 |
| 81 | #define EGPR_XSPOLL 4 |
| 82 | #define EGPR_NORESP 5 |
| 83 | #define EGPR_UVERSION 6 |
| 84 | } egp_handg; |
| 85 | #define egp_hello egp_handg.egpu_hello |
| 86 | #define egp_intgw egp_handg.egpu_gws[0] |
| 87 | #define egp_extgw egp_handg.egpu_gws[1] |
| 88 | #define egp_reason egp_handg.egpu_reason |
| 89 | union { |
| 90 | u_int16_t egpu_poll; |
| 91 | u_int32_t egpu_sourcenet; |
| 92 | } egp_pands; |
| 93 | #define egp_poll egp_pands.egpu_poll |
| 94 | #define egp_sourcenet egp_pands.egpu_sourcenet |
| 95 | }; |
| 96 | |
| 97 | const char *egp_acquire_codes[] = { |
| 98 | "request", |
| 99 | "confirm", |
| 100 | "refuse", |
| 101 | "cease", |
| 102 | "cease_ack" |
| 103 | }; |
| 104 | |
| 105 | const char *egp_acquire_status[] = { |
| 106 | "unspecified", |
| 107 | "active_mode", |
| 108 | "passive_mode", |
| 109 | "insufficient_resources", |
| 110 | "administratively_prohibited", |
| 111 | "going_down", |
| 112 | "parameter_violation", |
| 113 | "protocol_violation" |
| 114 | }; |
| 115 | |
| 116 | const char *egp_reach_codes[] = { |
| 117 | "hello", |
| 118 | "i-h-u" |
| 119 | }; |
| 120 | |
| 121 | const char *egp_status_updown[] = { |
| 122 | "indeterminate", |
| 123 | "up", |
| 124 | "down" |
| 125 | }; |
| 126 | |
| 127 | const char *egp_reasons[] = { |
| 128 | "unspecified", |
| 129 | "bad_EGP_header_format", |
| 130 | "bad_EGP_data_field_format", |
| 131 | "reachability_info_unavailable", |
| 132 | "excessive_polling_rate", |
| 133 | "no_response", |
| 134 | "unsupported_version" |
| 135 | }; |
| 136 | |
| 137 | static void |
| 138 | egpnrprint(register const struct egp_packet *egp) |
| 139 | { |
| 140 | register const u_int8_t *cp; |
| 141 | u_int32_t addr; |
| 142 | register u_int32_t net; |
| 143 | register u_int netlen; |
| 144 | int gateways, distances, networks; |
| 145 | int t_gateways; |
| 146 | const char *comma; |
| 147 | |
| 148 | addr = egp->egp_sourcenet; |
| 149 | if (IN_CLASSA(addr)) { |
| 150 | net = addr & IN_CLASSA_NET; |
| 151 | netlen = 1; |
| 152 | } else if (IN_CLASSB(addr)) { |
| 153 | net = addr & IN_CLASSB_NET; |
| 154 | netlen = 2; |
| 155 | } else if (IN_CLASSC(addr)) { |
| 156 | net = addr & IN_CLASSC_NET; |
| 157 | netlen = 3; |
| 158 | } else { |
| 159 | net = 0; |
| 160 | netlen = 0; |
| 161 | } |
| 162 | cp = (u_int8_t *)(egp + 1); |
| 163 | |
| 164 | t_gateways = egp->egp_intgw + egp->egp_extgw; |
| 165 | for (gateways = 0; gateways < t_gateways; ++gateways) { |
| 166 | /* Pickup host part of gateway address */ |
| 167 | addr = 0; |
| 168 | TCHECK2(cp[0], 4 - netlen); |
| 169 | switch (netlen) { |
| 170 | |
| 171 | case 1: |
| 172 | addr = *cp++; |
| 173 | /* fall through */ |
| 174 | case 2: |
| 175 | addr = (addr << 8) | *cp++; |
| 176 | /* fall through */ |
| 177 | case 3: |
| 178 | addr = (addr << 8) | *cp++; |
| 179 | } |
| 180 | addr |= net; |
| 181 | TCHECK2(cp[0], 1); |
| 182 | distances = *cp++; |
| 183 | printf(" %s %s ", |
| 184 | gateways < (int)egp->egp_intgw ? "int" : "ext", |
| 185 | ipaddr_string(&addr)); |
| 186 | |
| 187 | comma = ""; |
| 188 | putchar('('); |
| 189 | while (--distances >= 0) { |
| 190 | TCHECK2(cp[0], 2); |
| 191 | printf("%sd%d:", comma, (int)*cp++); |
| 192 | comma = ", "; |
| 193 | networks = *cp++; |
| 194 | while (--networks >= 0) { |
| 195 | /* Pickup network number */ |
| 196 | TCHECK2(cp[0], 1); |
| 197 | addr = (u_int32_t)*cp++ << 24; |
| 198 | if (IN_CLASSB(addr)) { |
| 199 | TCHECK2(cp[0], 1); |
| 200 | addr |= (u_int32_t)*cp++ << 16; |
| 201 | } else if (!IN_CLASSA(addr)) { |
| 202 | TCHECK2(cp[0], 2); |
| 203 | addr |= (u_int32_t)*cp++ << 16; |
| 204 | addr |= (u_int32_t)*cp++ << 8; |
| 205 | } |
| 206 | printf(" %s", ipaddr_string(&addr)); |
| 207 | } |
| 208 | } |
| 209 | putchar(')'); |
| 210 | } |
| 211 | return; |
| 212 | trunc: |
| 213 | fputs("[|]", stdout); |
| 214 | } |
| 215 | |
| 216 | void |
| 217 | egp_print(register const u_int8_t *bp, register u_int length) |
| 218 | { |
| 219 | register const struct egp_packet *egp; |
| 220 | register int status; |
| 221 | register int code; |
| 222 | register int type; |
| 223 | |
| 224 | egp = (struct egp_packet *)bp; |
| 225 | if (!TTEST2(*egp, length)) { |
| 226 | printf("[|egp]"); |
| 227 | return; |
| 228 | } |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 229 | |
| 230 | if (!vflag) { |
| 231 | printf("EGPv%u, AS %u, seq %u, length %u", |
| 232 | egp->egp_version, |
| 233 | EXTRACT_16BITS(&egp->egp_as), |
| 234 | EXTRACT_16BITS(&egp->egp_sequence), |
| 235 | length); |
| 236 | return; |
| 237 | } else |
| 238 | printf("EGPv%u, length %u", |
| 239 | egp->egp_version, |
| 240 | length); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 241 | |
| 242 | if (egp->egp_version != EGP_VERSION) { |
| 243 | printf("[version %d]", egp->egp_version); |
| 244 | return; |
| 245 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 246 | |
| 247 | type = egp->egp_type; |
| 248 | code = egp->egp_code; |
| 249 | status = egp->egp_status; |
| 250 | |
| 251 | switch (type) { |
| 252 | case EGPT_ACQUIRE: |
| 253 | printf(" acquire"); |
| 254 | switch (code) { |
| 255 | case EGPC_REQUEST: |
| 256 | case EGPC_CONFIRM: |
| 257 | printf(" %s", egp_acquire_codes[code]); |
| 258 | switch (status) { |
| 259 | case EGPS_UNSPEC: |
| 260 | case EGPS_ACTIVE: |
| 261 | case EGPS_PASSIVE: |
| 262 | printf(" %s", egp_acquire_status[status]); |
| 263 | break; |
| 264 | |
| 265 | default: |
| 266 | printf(" [status %d]", status); |
| 267 | break; |
| 268 | } |
| 269 | printf(" hello:%d poll:%d", |
| 270 | EXTRACT_16BITS(&egp->egp_hello), |
| 271 | EXTRACT_16BITS(&egp->egp_poll)); |
| 272 | break; |
| 273 | |
| 274 | case EGPC_REFUSE: |
| 275 | case EGPC_CEASE: |
| 276 | case EGPC_CEASEACK: |
| 277 | printf(" %s", egp_acquire_codes[code]); |
| 278 | switch (status ) { |
| 279 | case EGPS_UNSPEC: |
| 280 | case EGPS_NORES: |
| 281 | case EGPS_ADMIN: |
| 282 | case EGPS_GODOWN: |
| 283 | case EGPS_PARAM: |
| 284 | case EGPS_PROTO: |
| 285 | printf(" %s", egp_acquire_status[status]); |
| 286 | break; |
| 287 | |
| 288 | default: |
| 289 | printf("[status %d]", status); |
| 290 | break; |
| 291 | } |
| 292 | break; |
| 293 | |
| 294 | default: |
| 295 | printf("[code %d]", code); |
| 296 | break; |
| 297 | } |
| 298 | break; |
| 299 | |
| 300 | case EGPT_REACH: |
| 301 | switch (code) { |
| 302 | |
| 303 | case EGPC_HELLO: |
| 304 | case EGPC_HEARDU: |
| 305 | printf(" %s", egp_reach_codes[code]); |
| 306 | if (status <= EGPS_DOWN) |
| 307 | printf(" state:%s", egp_status_updown[status]); |
| 308 | else |
| 309 | printf(" [status %d]", status); |
| 310 | break; |
| 311 | |
| 312 | default: |
| 313 | printf("[reach code %d]", code); |
| 314 | break; |
| 315 | } |
| 316 | break; |
| 317 | |
| 318 | case EGPT_POLL: |
| 319 | printf(" poll"); |
| 320 | if (egp->egp_status <= EGPS_DOWN) |
| 321 | printf(" state:%s", egp_status_updown[status]); |
| 322 | else |
| 323 | printf(" [status %d]", status); |
| 324 | printf(" net:%s", ipaddr_string(&egp->egp_sourcenet)); |
| 325 | break; |
| 326 | |
| 327 | case EGPT_UPDATE: |
| 328 | printf(" update"); |
| 329 | if (status & EGPS_UNSOL) { |
| 330 | status &= ~EGPS_UNSOL; |
| 331 | printf(" unsolicited"); |
| 332 | } |
| 333 | if (status <= EGPS_DOWN) |
| 334 | printf(" state:%s", egp_status_updown[status]); |
| 335 | else |
| 336 | printf(" [status %d]", status); |
| 337 | printf(" %s int %d ext %d", |
| 338 | ipaddr_string(&egp->egp_sourcenet), |
| 339 | egp->egp_intgw, |
| 340 | egp->egp_extgw); |
| 341 | if (vflag) |
| 342 | egpnrprint(egp); |
| 343 | break; |
| 344 | |
| 345 | case EGPT_ERROR: |
| 346 | printf(" error"); |
| 347 | if (status <= EGPS_DOWN) |
| 348 | printf(" state:%s", egp_status_updown[status]); |
| 349 | else |
| 350 | printf(" [status %d]", status); |
| 351 | |
| 352 | if (EXTRACT_16BITS(&egp->egp_reason) <= EGPR_UVERSION) |
| 353 | printf(" %s", egp_reasons[EXTRACT_16BITS(&egp->egp_reason)]); |
| 354 | else |
| 355 | printf(" [reason %d]", EXTRACT_16BITS(&egp->egp_reason)); |
| 356 | break; |
| 357 | |
| 358 | default: |
| 359 | printf("[type %d]", type); |
| 360 | break; |
| 361 | } |
| 362 | } |