1/* 2 * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 * 21 * PPTP support contributed by Motonori Shindo (mshindo@mshindo.net) 22 */ 23 24/* \summary: Point-to-Point Tunnelling Protocol (PPTP) printer */ 25 26/* specification: RFC 2637 */ 27 28#ifdef HAVE_CONFIG_H 29#include <config.h> 30#endif 31 32#include "netdissect-stdinc.h" 33 34#include "netdissect.h" 35#include "extract.h" 36 37 38#define PPTP_MSG_TYPE_CTRL 1 /* Control Message */ 39#define PPTP_MSG_TYPE_MGMT 2 /* Management Message (currently not used */ 40#define PPTP_MAGIC_COOKIE 0x1a2b3c4d /* for sanity check */ 41 42#define PPTP_CTRL_MSG_TYPE_SCCRQ 1 43#define PPTP_CTRL_MSG_TYPE_SCCRP 2 44#define PPTP_CTRL_MSG_TYPE_StopCCRQ 3 45#define PPTP_CTRL_MSG_TYPE_StopCCRP 4 46#define PPTP_CTRL_MSG_TYPE_ECHORQ 5 47#define PPTP_CTRL_MSG_TYPE_ECHORP 6 48#define PPTP_CTRL_MSG_TYPE_OCRQ 7 49#define PPTP_CTRL_MSG_TYPE_OCRP 8 50#define PPTP_CTRL_MSG_TYPE_ICRQ 9 51#define PPTP_CTRL_MSG_TYPE_ICRP 10 52#define PPTP_CTRL_MSG_TYPE_ICCN 11 53#define PPTP_CTRL_MSG_TYPE_CCRQ 12 54#define PPTP_CTRL_MSG_TYPE_CDN 13 55#define PPTP_CTRL_MSG_TYPE_WEN 14 56#define PPTP_CTRL_MSG_TYPE_SLI 15 57 58#define PPTP_FRAMING_CAP_ASYNC_MASK 0x00000001 /* Asynchronous */ 59#define PPTP_FRAMING_CAP_SYNC_MASK 0x00000002 /* Synchronous */ 60 61#define PPTP_BEARER_CAP_ANALOG_MASK 0x00000001 /* Analog */ 62#define PPTP_BEARER_CAP_DIGITAL_MASK 0x00000002 /* Digital */ 63 64static const char *pptp_message_type_string[] = { 65 "NOT_DEFINED", /* 0 Not defined in the RFC2637 */ 66 "SCCRQ", /* 1 Start-Control-Connection-Request */ 67 "SCCRP", /* 2 Start-Control-Connection-Reply */ 68 "StopCCRQ", /* 3 Stop-Control-Connection-Request */ 69 "StopCCRP", /* 4 Stop-Control-Connection-Reply */ 70 "ECHORQ", /* 5 Echo Request */ 71 "ECHORP", /* 6 Echo Reply */ 72 73 "OCRQ", /* 7 Outgoing-Call-Request */ 74 "OCRP", /* 8 Outgoing-Call-Reply */ 75 "ICRQ", /* 9 Incoming-Call-Request */ 76 "ICRP", /* 10 Incoming-Call-Reply */ 77 "ICCN", /* 11 Incoming-Call-Connected */ 78 "CCRQ", /* 12 Call-Clear-Request */ 79 "CDN", /* 13 Call-Disconnect-Notify */ 80 81 "WEN", /* 14 WAN-Error-Notify */ 82 83 "SLI" /* 15 Set-Link-Info */ 84#define PPTP_MAX_MSGTYPE_INDEX 16 85}; 86 87/* common for all PPTP control messages */ 88struct pptp_hdr { 89 nd_uint16_t length; 90 nd_uint16_t msg_type; 91 nd_uint32_t magic_cookie; 92 nd_uint16_t ctrl_msg_type; 93 nd_uint16_t reserved0; 94}; 95 96struct pptp_msg_sccrq { 97 nd_uint16_t proto_ver; 98 nd_uint16_t reserved1; 99 nd_uint32_t framing_cap; 100 nd_uint32_t bearer_cap; 101 nd_uint16_t max_channel; 102 nd_uint16_t firm_rev; 103 nd_byte hostname[64]; 104 nd_byte vendor[64]; 105}; 106 107struct pptp_msg_sccrp { 108 nd_uint16_t proto_ver; 109 nd_uint8_t result_code; 110 nd_uint8_t err_code; 111 nd_uint32_t framing_cap; 112 nd_uint32_t bearer_cap; 113 nd_uint16_t max_channel; 114 nd_uint16_t firm_rev; 115 nd_byte hostname[64]; 116 nd_byte vendor[64]; 117}; 118 119struct pptp_msg_stopccrq { 120 nd_uint8_t reason; 121 nd_uint8_t reserved1; 122 nd_uint16_t reserved2; 123}; 124 125struct pptp_msg_stopccrp { 126 nd_uint8_t result_code; 127 nd_uint8_t err_code; 128 nd_uint16_t reserved1; 129}; 130 131struct pptp_msg_echorq { 132 nd_uint32_t id; 133}; 134 135struct pptp_msg_echorp { 136 nd_uint32_t id; 137 nd_uint8_t result_code; 138 nd_uint8_t err_code; 139 nd_uint16_t reserved1; 140}; 141 142struct pptp_msg_ocrq { 143 nd_uint16_t call_id; 144 nd_uint16_t call_ser; 145 nd_uint32_t min_bps; 146 nd_uint32_t max_bps; 147 nd_uint32_t bearer_type; 148 nd_uint32_t framing_type; 149 nd_uint16_t recv_winsiz; 150 nd_uint16_t pkt_proc_delay; 151 nd_uint16_t phone_no_len; 152 nd_uint16_t reserved1; 153 nd_byte phone_no[64]; 154 nd_byte subaddr[64]; 155}; 156 157struct pptp_msg_ocrp { 158 nd_uint16_t call_id; 159 nd_uint16_t peer_call_id; 160 nd_uint8_t result_code; 161 nd_uint8_t err_code; 162 nd_uint16_t cause_code; 163 nd_uint32_t conn_speed; 164 nd_uint16_t recv_winsiz; 165 nd_uint16_t pkt_proc_delay; 166 nd_uint32_t phy_chan_id; 167}; 168 169struct pptp_msg_icrq { 170 nd_uint16_t call_id; 171 nd_uint16_t call_ser; 172 nd_uint32_t bearer_type; 173 nd_uint32_t phy_chan_id; 174 nd_uint16_t dialed_no_len; 175 nd_uint16_t dialing_no_len; 176 nd_byte dialed_no[64]; /* DNIS */ 177 nd_byte dialing_no[64]; /* CLID */ 178 nd_byte subaddr[64]; 179}; 180 181struct pptp_msg_icrp { 182 nd_uint16_t call_id; 183 nd_uint16_t peer_call_id; 184 nd_uint8_t result_code; 185 nd_uint8_t err_code; 186 nd_uint16_t recv_winsiz; 187 nd_uint16_t pkt_proc_delay; 188 nd_uint16_t reserved1; 189}; 190 191struct pptp_msg_iccn { 192 nd_uint16_t peer_call_id; 193 nd_uint16_t reserved1; 194 nd_uint32_t conn_speed; 195 nd_uint16_t recv_winsiz; 196 nd_uint16_t pkt_proc_delay; 197 nd_uint32_t framing_type; 198}; 199 200struct pptp_msg_ccrq { 201 nd_uint16_t call_id; 202 nd_uint16_t reserved1; 203}; 204 205struct pptp_msg_cdn { 206 nd_uint16_t call_id; 207 nd_uint8_t result_code; 208 nd_uint8_t err_code; 209 nd_uint16_t cause_code; 210 nd_uint16_t reserved1; 211 nd_byte call_stats[128]; 212}; 213 214struct pptp_msg_wen { 215 nd_uint16_t peer_call_id; 216 nd_uint16_t reserved1; 217 nd_uint32_t crc_err; 218 nd_uint32_t framing_err; 219 nd_uint32_t hardware_overrun; 220 nd_uint32_t buffer_overrun; 221 nd_uint32_t timeout_err; 222 nd_uint32_t align_err; 223}; 224 225struct pptp_msg_sli { 226 nd_uint16_t peer_call_id; 227 nd_uint16_t reserved1; 228 nd_uint32_t send_accm; 229 nd_uint32_t recv_accm; 230}; 231 232/* attributes that appear more than once in above messages: 233 234 Number of 235 occurrence attributes 236 -------------------------------------- 237 2 uint32_t bearer_cap; 238 2 uint32_t bearer_type; 239 6 uint16_t call_id; 240 2 uint16_t call_ser; 241 2 uint16_t cause_code; 242 2 uint32_t conn_speed; 243 6 uint8_t err_code; 244 2 uint16_t firm_rev; 245 2 uint32_t framing_cap; 246 2 uint32_t framing_type; 247 2 u_char hostname[64]; 248 2 uint32_t id; 249 2 uint16_t max_channel; 250 5 uint16_t peer_call_id; 251 2 uint32_t phy_chan_id; 252 4 uint16_t pkt_proc_delay; 253 2 uint16_t proto_ver; 254 4 uint16_t recv_winsiz; 255 2 uint8_t reserved1; 256 9 uint16_t reserved1; 257 6 uint8_t result_code; 258 2 u_char subaddr[64]; 259 2 u_char vendor[64]; 260 261 so I will prepare print out functions for these attributes (except for 262 reserved*). 263*/ 264 265#define PRINT_RESERVED_IF_NOT_ZERO_1(reserved) \ 266 if (GET_U_1(reserved)) \ 267 ND_PRINT(" [ERROR: reserved=%u must be zero]", \ 268 GET_U_1(reserved)); 269 270#define PRINT_RESERVED_IF_NOT_ZERO_2(reserved) \ 271 if (GET_BE_U_2(reserved)) \ 272 ND_PRINT(" [ERROR: reserved=%u must be zero]", \ 273 GET_BE_U_2(reserved)); 274 275/******************************************/ 276/* Attribute-specific print out functions */ 277/******************************************/ 278 279static void 280pptp_bearer_cap_print(netdissect_options *ndo, 281 const nd_uint32_t bearer_cap) 282{ 283 ND_PRINT(" BEARER_CAP(%s%s)", 284 GET_BE_U_4(bearer_cap) & PPTP_BEARER_CAP_DIGITAL_MASK ? "D" : "", 285 GET_BE_U_4(bearer_cap) & PPTP_BEARER_CAP_ANALOG_MASK ? "A" : ""); 286} 287 288static const struct tok pptp_btype_str[] = { 289 { 1, "A" }, /* Analog */ 290 { 2, "D" }, /* Digital */ 291 { 3, "Any" }, 292 { 0, NULL } 293}; 294 295static void 296pptp_bearer_type_print(netdissect_options *ndo, 297 const nd_uint32_t bearer_type) 298{ 299 ND_PRINT(" BEARER_TYPE(%s)", 300 tok2str(pptp_btype_str, "?", GET_BE_U_4(bearer_type))); 301} 302 303static void 304pptp_call_id_print(netdissect_options *ndo, 305 const nd_uint16_t call_id) 306{ 307 ND_PRINT(" CALL_ID(%u)", GET_BE_U_2(call_id)); 308} 309 310static void 311pptp_call_ser_print(netdissect_options *ndo, 312 const nd_uint16_t call_ser) 313{ 314 ND_PRINT(" CALL_SER_NUM(%u)", GET_BE_U_2(call_ser)); 315} 316 317static void 318pptp_cause_code_print(netdissect_options *ndo, 319 const nd_uint16_t cause_code) 320{ 321 ND_PRINT(" CAUSE_CODE(%u)", GET_BE_U_2(cause_code)); 322} 323 324static void 325pptp_conn_speed_print(netdissect_options *ndo, 326 const nd_uint32_t conn_speed) 327{ 328 ND_PRINT(" CONN_SPEED(%u)", GET_BE_U_4(conn_speed)); 329} 330 331static const struct tok pptp_errcode_str[] = { 332 { 0, "None" }, 333 { 1, "Not-Connected" }, 334 { 2, "Bad-Format" }, 335 { 3, "Bad-Value" }, 336 { 4, "No-Resource" }, 337 { 5, "Bad-Call-ID" }, 338 { 6, "PAC-Error" }, 339 { 0, NULL } 340}; 341 342static void 343pptp_err_code_print(netdissect_options *ndo, 344 const nd_uint8_t err_code) 345{ 346 ND_PRINT(" ERR_CODE(%u", GET_U_1(err_code)); 347 if (ndo->ndo_vflag) { 348 ND_PRINT(":%s", 349 tok2str(pptp_errcode_str, "?", GET_U_1(err_code))); 350 } 351 ND_PRINT(")"); 352} 353 354static void 355pptp_firm_rev_print(netdissect_options *ndo, 356 const nd_uint16_t firm_rev) 357{ 358 ND_PRINT(" FIRM_REV(%u)", GET_BE_U_2(firm_rev)); 359} 360 361static void 362pptp_framing_cap_print(netdissect_options *ndo, 363 const nd_uint32_t framing_cap) 364{ 365 ND_PRINT(" FRAME_CAP("); 366 if (GET_BE_U_4(framing_cap) & PPTP_FRAMING_CAP_ASYNC_MASK) { 367 ND_PRINT("A"); /* Async */ 368 } 369 if (GET_BE_U_4(framing_cap) & PPTP_FRAMING_CAP_SYNC_MASK) { 370 ND_PRINT("S"); /* Sync */ 371 } 372 ND_PRINT(")"); 373} 374 375static const struct tok pptp_ftype_str[] = { 376 { 1, "A" }, /* Async */ 377 { 2, "S" }, /* Sync */ 378 { 3, "E" }, /* Either */ 379 { 0, NULL } 380}; 381 382static void 383pptp_framing_type_print(netdissect_options *ndo, 384 const nd_uint32_t framing_type) 385{ 386 ND_PRINT(" FRAME_TYPE(%s)", 387 tok2str(pptp_ftype_str, "?", GET_BE_U_4(framing_type))); 388} 389 390static void 391pptp_hostname_print(netdissect_options *ndo, 392 const u_char *hostname) 393{ 394 ND_PRINT(" HOSTNAME("); 395 nd_printjnp(ndo, hostname, 64); 396 ND_PRINT(")"); 397} 398 399static void 400pptp_id_print(netdissect_options *ndo, 401 const nd_uint32_t id) 402{ 403 ND_PRINT(" ID(%u)", GET_BE_U_4(id)); 404} 405 406static void 407pptp_max_channel_print(netdissect_options *ndo, 408 const nd_uint16_t max_channel) 409{ 410 ND_PRINT(" MAX_CHAN(%u)", GET_BE_U_2(max_channel)); 411} 412 413static void 414pptp_peer_call_id_print(netdissect_options *ndo, 415 const nd_uint16_t peer_call_id) 416{ 417 ND_PRINT(" PEER_CALL_ID(%u)", GET_BE_U_2(peer_call_id)); 418} 419 420static void 421pptp_phy_chan_id_print(netdissect_options *ndo, 422 const nd_uint32_t phy_chan_id) 423{ 424 ND_PRINT(" PHY_CHAN_ID(%u)", GET_BE_U_4(phy_chan_id)); 425} 426 427static void 428pptp_pkt_proc_delay_print(netdissect_options *ndo, 429 const nd_uint16_t pkt_proc_delay) 430{ 431 ND_PRINT(" PROC_DELAY(%u)", GET_BE_U_2(pkt_proc_delay)); 432} 433 434static void 435pptp_proto_ver_print(netdissect_options *ndo, 436 const nd_uint16_t proto_ver) 437{ 438 ND_PRINT(" PROTO_VER(%u.%u)", /* Version.Revision */ 439 GET_BE_U_2(proto_ver) >> 8, 440 GET_BE_U_2(proto_ver) & 0xff); 441} 442 443static void 444pptp_recv_winsiz_print(netdissect_options *ndo, 445 const nd_uint16_t recv_winsiz) 446{ 447 ND_PRINT(" RECV_WIN(%u)", GET_BE_U_2(recv_winsiz)); 448} 449 450static const struct tok pptp_scrrp_str[] = { 451 { 1, "Successful channel establishment" }, 452 { 2, "General error" }, 453 { 3, "Command channel already exists" }, 454 { 4, "Requester is not authorized to establish a command channel" }, 455 { 5, "The protocol version of the requester is not supported" }, 456 { 0, NULL } 457}; 458 459static const struct tok pptp_echorp_str[] = { 460 { 1, "OK" }, 461 { 2, "General Error" }, 462 { 0, NULL } 463}; 464 465static const struct tok pptp_ocrp_str[] = { 466 { 1, "Connected" }, 467 { 2, "General Error" }, 468 { 3, "No Carrier" }, 469 { 4, "Busy" }, 470 { 5, "No Dial Tone" }, 471 { 6, "Time-out" }, 472 { 7, "Do Not Accept" }, 473 { 0, NULL } 474}; 475 476static const struct tok pptp_icrp_str[] = { 477 { 1, "Connect" }, 478 { 2, "General Error" }, 479 { 3, "Do Not Accept" }, 480 { 0, NULL } 481}; 482 483static const struct tok pptp_cdn_str[] = { 484 { 1, "Lost Carrier" }, 485 { 2, "General Error" }, 486 { 3, "Admin Shutdown" }, 487 { 4, "Request" }, 488 { 0, NULL } 489}; 490 491static void 492pptp_result_code_print(netdissect_options *ndo, 493 const nd_uint8_t result_code, int ctrl_msg_type) 494{ 495 ND_PRINT(" RESULT_CODE(%u", GET_U_1(result_code)); 496 if (ndo->ndo_vflag) { 497 const struct tok *dict = 498 ctrl_msg_type == PPTP_CTRL_MSG_TYPE_SCCRP ? pptp_scrrp_str : 499 ctrl_msg_type == PPTP_CTRL_MSG_TYPE_StopCCRP ? pptp_echorp_str : 500 ctrl_msg_type == PPTP_CTRL_MSG_TYPE_ECHORP ? pptp_echorp_str : 501 ctrl_msg_type == PPTP_CTRL_MSG_TYPE_OCRP ? pptp_ocrp_str : 502 ctrl_msg_type == PPTP_CTRL_MSG_TYPE_ICRP ? pptp_icrp_str : 503 ctrl_msg_type == PPTP_CTRL_MSG_TYPE_CDN ? pptp_cdn_str : 504 NULL; /* assertion error */ 505 if (dict != NULL) 506 ND_PRINT(":%s", 507 tok2str(dict, "?", GET_U_1(result_code))); 508 } 509 ND_PRINT(")"); 510} 511 512static void 513pptp_subaddr_print(netdissect_options *ndo, 514 const u_char *subaddr) 515{ 516 ND_PRINT(" SUB_ADDR("); 517 nd_printjnp(ndo, subaddr, 64); 518 ND_PRINT(")"); 519} 520 521static void 522pptp_vendor_print(netdissect_options *ndo, 523 const u_char *vendor) 524{ 525 ND_PRINT(" VENDOR("); 526 nd_printjnp(ndo, vendor, 64); 527 ND_PRINT(")"); 528} 529 530/************************************/ 531/* PPTP message print out functions */ 532/************************************/ 533static void 534pptp_sccrq_print(netdissect_options *ndo, 535 const u_char *dat) 536{ 537 const struct pptp_msg_sccrq *ptr = (const struct pptp_msg_sccrq *)dat; 538 539 pptp_proto_ver_print(ndo, ptr->proto_ver); 540 PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); 541 pptp_framing_cap_print(ndo, ptr->framing_cap); 542 pptp_bearer_cap_print(ndo, ptr->bearer_cap); 543 pptp_max_channel_print(ndo, ptr->max_channel); 544 pptp_firm_rev_print(ndo, ptr->firm_rev); 545 pptp_hostname_print(ndo, ptr->hostname); 546 pptp_vendor_print(ndo, ptr->vendor); 547} 548 549static void 550pptp_sccrp_print(netdissect_options *ndo, 551 const u_char *dat) 552{ 553 const struct pptp_msg_sccrp *ptr = (const struct pptp_msg_sccrp *)dat; 554 555 pptp_proto_ver_print(ndo, ptr->proto_ver); 556 pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_SCCRP); 557 pptp_err_code_print(ndo, ptr->err_code); 558 pptp_framing_cap_print(ndo, ptr->framing_cap); 559 pptp_bearer_cap_print(ndo, ptr->bearer_cap); 560 pptp_max_channel_print(ndo, ptr->max_channel); 561 pptp_firm_rev_print(ndo, ptr->firm_rev); 562 pptp_hostname_print(ndo, ptr->hostname); 563 pptp_vendor_print(ndo, ptr->vendor); 564} 565 566static void 567pptp_stopccrq_print(netdissect_options *ndo, 568 const u_char *dat) 569{ 570 const struct pptp_msg_stopccrq *ptr = (const struct pptp_msg_stopccrq *)dat; 571 572 ND_PRINT(" REASON(%u", GET_U_1(ptr->reason)); 573 if (ndo->ndo_vflag) { 574 switch (GET_U_1(ptr->reason)) { 575 case 1: 576 ND_PRINT(":None"); 577 break; 578 case 2: 579 ND_PRINT(":Stop-Protocol"); 580 break; 581 case 3: 582 ND_PRINT(":Stop-Local-Shutdown"); 583 break; 584 default: 585 ND_PRINT(":?"); 586 break; 587 } 588 } 589 ND_PRINT(")"); 590 PRINT_RESERVED_IF_NOT_ZERO_1(ptr->reserved1); 591 PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved2); 592} 593 594static void 595pptp_stopccrp_print(netdissect_options *ndo, 596 const u_char *dat) 597{ 598 const struct pptp_msg_stopccrp *ptr = (const struct pptp_msg_stopccrp *)dat; 599 600 pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_StopCCRP); 601 pptp_err_code_print(ndo, ptr->err_code); 602 PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); 603} 604 605static void 606pptp_echorq_print(netdissect_options *ndo, 607 const u_char *dat) 608{ 609 const struct pptp_msg_echorq *ptr = (const struct pptp_msg_echorq *)dat; 610 611 pptp_id_print(ndo, ptr->id); 612} 613 614static void 615pptp_echorp_print(netdissect_options *ndo, 616 const u_char *dat) 617{ 618 const struct pptp_msg_echorp *ptr = (const struct pptp_msg_echorp *)dat; 619 620 pptp_id_print(ndo, ptr->id); 621 pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_ECHORP); 622 pptp_err_code_print(ndo, ptr->err_code); 623 PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); 624} 625 626static void 627pptp_ocrq_print(netdissect_options *ndo, 628 const u_char *dat) 629{ 630 const struct pptp_msg_ocrq *ptr = (const struct pptp_msg_ocrq *)dat; 631 632 pptp_call_id_print(ndo, ptr->call_id); 633 pptp_call_ser_print(ndo, ptr->call_ser); 634 ND_PRINT(" MIN_BPS(%u)", GET_BE_U_4(ptr->min_bps)); 635 ND_PRINT(" MAX_BPS(%u)", GET_BE_U_4(ptr->max_bps)); 636 pptp_bearer_type_print(ndo, ptr->bearer_type); 637 pptp_framing_type_print(ndo, ptr->framing_type); 638 pptp_recv_winsiz_print(ndo, ptr->recv_winsiz); 639 pptp_pkt_proc_delay_print(ndo, ptr->pkt_proc_delay); 640 ND_PRINT(" PHONE_NO_LEN(%u)", GET_BE_U_2(ptr->phone_no_len)); 641 PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); 642 ND_PRINT(" PHONE_NO("); 643 nd_printjnp(ndo, ptr->phone_no, 644 ND_MIN(64, GET_BE_U_2(ptr->phone_no_len))); 645 ND_PRINT(")"); 646 pptp_subaddr_print(ndo, ptr->subaddr); 647} 648 649static void 650pptp_ocrp_print(netdissect_options *ndo, 651 const u_char *dat) 652{ 653 const struct pptp_msg_ocrp *ptr = (const struct pptp_msg_ocrp *)dat; 654 655 pptp_call_id_print(ndo, ptr->call_id); 656 pptp_peer_call_id_print(ndo, ptr->peer_call_id); 657 pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_OCRP); 658 pptp_err_code_print(ndo, ptr->err_code); 659 pptp_cause_code_print(ndo, ptr->cause_code); 660 pptp_conn_speed_print(ndo, ptr->conn_speed); 661 pptp_recv_winsiz_print(ndo, ptr->recv_winsiz); 662 pptp_pkt_proc_delay_print(ndo, ptr->pkt_proc_delay); 663 pptp_phy_chan_id_print(ndo, ptr->phy_chan_id); 664} 665 666static void 667pptp_icrq_print(netdissect_options *ndo, 668 const u_char *dat) 669{ 670 const struct pptp_msg_icrq *ptr = (const struct pptp_msg_icrq *)dat; 671 672 pptp_call_id_print(ndo, ptr->call_id); 673 pptp_call_ser_print(ndo, ptr->call_ser); 674 pptp_bearer_type_print(ndo, ptr->bearer_type); 675 pptp_phy_chan_id_print(ndo, ptr->phy_chan_id); 676 ND_PRINT(" DIALED_NO_LEN(%u)", GET_BE_U_2(ptr->dialed_no_len)); 677 ND_PRINT(" DIALING_NO_LEN(%u)", GET_BE_U_2(ptr->dialing_no_len)); 678 ND_PRINT(" DIALED_NO("); 679 nd_printjnp(ndo, ptr->dialed_no, 680 ND_MIN(64, GET_BE_U_2(ptr->dialed_no_len))); 681 ND_PRINT(")"); 682 ND_PRINT(" DIALING_NO("); 683 nd_printjnp(ndo, ptr->dialing_no, 684 ND_MIN(64, GET_BE_U_2(ptr->dialing_no_len))); 685 ND_PRINT(")"); 686 pptp_subaddr_print(ndo, ptr->subaddr); 687} 688 689static void 690pptp_icrp_print(netdissect_options *ndo, 691 const u_char *dat) 692{ 693 const struct pptp_msg_icrp *ptr = (const struct pptp_msg_icrp *)dat; 694 695 pptp_call_id_print(ndo, ptr->call_id); 696 pptp_peer_call_id_print(ndo, ptr->peer_call_id); 697 pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_ICRP); 698 pptp_err_code_print(ndo, ptr->err_code); 699 pptp_recv_winsiz_print(ndo, ptr->recv_winsiz); 700 pptp_pkt_proc_delay_print(ndo, ptr->pkt_proc_delay); 701 PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); 702} 703 704static void 705pptp_iccn_print(netdissect_options *ndo, 706 const u_char *dat) 707{ 708 const struct pptp_msg_iccn *ptr = (const struct pptp_msg_iccn *)dat; 709 710 pptp_peer_call_id_print(ndo, ptr->peer_call_id); 711 PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); 712 pptp_conn_speed_print(ndo, ptr->conn_speed); 713 pptp_recv_winsiz_print(ndo, ptr->recv_winsiz); 714 pptp_pkt_proc_delay_print(ndo, ptr->pkt_proc_delay); 715 pptp_framing_type_print(ndo, ptr->framing_type); 716} 717 718static void 719pptp_ccrq_print(netdissect_options *ndo, 720 const u_char *dat) 721{ 722 const struct pptp_msg_ccrq *ptr = (const struct pptp_msg_ccrq *)dat; 723 724 pptp_call_id_print(ndo, ptr->call_id); 725 PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); 726} 727 728static void 729pptp_cdn_print(netdissect_options *ndo, 730 const u_char *dat) 731{ 732 const struct pptp_msg_cdn *ptr = (const struct pptp_msg_cdn *)dat; 733 734 pptp_call_id_print(ndo, ptr->call_id); 735 pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_CDN); 736 pptp_err_code_print(ndo, ptr->err_code); 737 pptp_cause_code_print(ndo, ptr->cause_code); 738 PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); 739 ND_PRINT(" CALL_STATS("); 740 nd_printjnp(ndo, ptr->call_stats, 128); 741 ND_PRINT(")"); 742} 743 744static void 745pptp_wen_print(netdissect_options *ndo, 746 const u_char *dat) 747{ 748 const struct pptp_msg_wen *ptr = (const struct pptp_msg_wen *)dat; 749 750 pptp_peer_call_id_print(ndo, ptr->peer_call_id); 751 PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); 752 ND_PRINT(" CRC_ERR(%u)", GET_BE_U_4(ptr->crc_err)); 753 ND_PRINT(" FRAMING_ERR(%u)", GET_BE_U_4(ptr->framing_err)); 754 ND_PRINT(" HARDWARE_OVERRUN(%u)", GET_BE_U_4(ptr->hardware_overrun)); 755 ND_PRINT(" BUFFER_OVERRUN(%u)", GET_BE_U_4(ptr->buffer_overrun)); 756 ND_PRINT(" TIMEOUT_ERR(%u)", GET_BE_U_4(ptr->timeout_err)); 757 ND_PRINT(" ALIGN_ERR(%u)", GET_BE_U_4(ptr->align_err)); 758} 759 760static void 761pptp_sli_print(netdissect_options *ndo, 762 const u_char *dat) 763{ 764 const struct pptp_msg_sli *ptr = (const struct pptp_msg_sli *)dat; 765 766 pptp_peer_call_id_print(ndo, ptr->peer_call_id); 767 PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); 768 ND_PRINT(" SEND_ACCM(0x%08x)", GET_BE_U_4(ptr->send_accm)); 769 ND_PRINT(" RECV_ACCM(0x%08x)", GET_BE_U_4(ptr->recv_accm)); 770} 771 772void 773pptp_print(netdissect_options *ndo, 774 const u_char *dat) 775{ 776 const struct pptp_hdr *hdr; 777 uint32_t mc; 778 uint16_t ctrl_msg_type; 779 780 ndo->ndo_protocol = "pptp"; 781 ND_PRINT(": "); 782 nd_print_protocol(ndo); 783 784 hdr = (const struct pptp_hdr *)dat; 785 786 if (ndo->ndo_vflag) { 787 ND_PRINT(" Length=%u", GET_BE_U_2(hdr->length)); 788 } 789 if (ndo->ndo_vflag) { 790 switch(GET_BE_U_2(hdr->msg_type)) { 791 case PPTP_MSG_TYPE_CTRL: 792 ND_PRINT(" CTRL-MSG"); 793 break; 794 case PPTP_MSG_TYPE_MGMT: 795 ND_PRINT(" MGMT-MSG"); 796 break; 797 default: 798 ND_PRINT(" UNKNOWN-MSG-TYPE"); 799 break; 800 } 801 } 802 803 mc = GET_BE_U_4(hdr->magic_cookie); 804 if (mc != PPTP_MAGIC_COOKIE) { 805 ND_PRINT(" UNEXPECTED Magic-Cookie!!(%08x)", mc); 806 } 807 if (ndo->ndo_vflag || mc != PPTP_MAGIC_COOKIE) { 808 ND_PRINT(" Magic-Cookie=%08x", mc); 809 } 810 ctrl_msg_type = GET_BE_U_2(hdr->ctrl_msg_type); 811 if (ctrl_msg_type < PPTP_MAX_MSGTYPE_INDEX) { 812 ND_PRINT(" CTRL_MSGTYPE=%s", 813 pptp_message_type_string[ctrl_msg_type]); 814 } else { 815 ND_PRINT(" UNKNOWN_CTRL_MSGTYPE(%u)", ctrl_msg_type); 816 } 817 PRINT_RESERVED_IF_NOT_ZERO_2(hdr->reserved0); 818 819 dat += 12; 820 821 switch(ctrl_msg_type) { 822 case PPTP_CTRL_MSG_TYPE_SCCRQ: 823 pptp_sccrq_print(ndo, dat); 824 break; 825 case PPTP_CTRL_MSG_TYPE_SCCRP: 826 pptp_sccrp_print(ndo, dat); 827 break; 828 case PPTP_CTRL_MSG_TYPE_StopCCRQ: 829 pptp_stopccrq_print(ndo, dat); 830 break; 831 case PPTP_CTRL_MSG_TYPE_StopCCRP: 832 pptp_stopccrp_print(ndo, dat); 833 break; 834 case PPTP_CTRL_MSG_TYPE_ECHORQ: 835 pptp_echorq_print(ndo, dat); 836 break; 837 case PPTP_CTRL_MSG_TYPE_ECHORP: 838 pptp_echorp_print(ndo, dat); 839 break; 840 case PPTP_CTRL_MSG_TYPE_OCRQ: 841 pptp_ocrq_print(ndo, dat); 842 break; 843 case PPTP_CTRL_MSG_TYPE_OCRP: 844 pptp_ocrp_print(ndo, dat); 845 break; 846 case PPTP_CTRL_MSG_TYPE_ICRQ: 847 pptp_icrq_print(ndo, dat); 848 break; 849 case PPTP_CTRL_MSG_TYPE_ICRP: 850 pptp_icrp_print(ndo, dat); 851 break; 852 case PPTP_CTRL_MSG_TYPE_ICCN: 853 pptp_iccn_print(ndo, dat); 854 break; 855 case PPTP_CTRL_MSG_TYPE_CCRQ: 856 pptp_ccrq_print(ndo, dat); 857 break; 858 case PPTP_CTRL_MSG_TYPE_CDN: 859 pptp_cdn_print(ndo, dat); 860 break; 861 case PPTP_CTRL_MSG_TYPE_WEN: 862 pptp_wen_print(ndo, dat); 863 break; 864 case PPTP_CTRL_MSG_TYPE_SLI: 865 pptp_sli_print(ndo, dat); 866 break; 867 default: 868 /* do nothing */ 869 break; 870 } 871} 872