The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1990, 1991, 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, 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 | |
| 22 | #ifndef lint |
| 23 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 24 | "@(#)$Header: /tcpdump/master/tcpdump/print-fr.c,v 1.51 2006-06-23 22:20:32 hannes Exp $ (LBL)"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 25 | #endif |
| 26 | |
| 27 | #ifdef HAVE_CONFIG_H |
| 28 | #include "config.h" |
| 29 | #endif |
| 30 | |
| 31 | #include <tcpdump-stdinc.h> |
| 32 | |
| 33 | #include <stdio.h> |
| 34 | #include <string.h> |
| 35 | #include <pcap.h> |
| 36 | |
| 37 | #include "addrtoname.h" |
| 38 | #include "interface.h" |
| 39 | #include "ethertype.h" |
| 40 | #include "nlpid.h" |
| 41 | #include "extract.h" |
| 42 | #include "oui.h" |
| 43 | |
| 44 | static void frf15_print(const u_char *, u_int); |
| 45 | |
| 46 | /* |
| 47 | * the frame relay header has a variable length |
| 48 | * |
| 49 | * the EA bit determines if there is another byte |
| 50 | * in the header |
| 51 | * |
| 52 | * minimum header length is 2 bytes |
| 53 | * maximum header length is 4 bytes |
| 54 | * |
| 55 | * 7 6 5 4 3 2 1 0 |
| 56 | * +----+----+----+----+----+----+----+----+ |
| 57 | * | DLCI (6 bits) | CR | EA | |
| 58 | * +----+----+----+----+----+----+----+----+ |
| 59 | * | DLCI (4 bits) |FECN|BECN| DE | EA | |
| 60 | * +----+----+----+----+----+----+----+----+ |
| 61 | * | DLCI (7 bits) | EA | |
| 62 | * +----+----+----+----+----+----+----+----+ |
| 63 | * | DLCI (6 bits) |SDLC| EA | |
| 64 | * +----+----+----+----+----+----+----+----+ |
| 65 | */ |
| 66 | |
| 67 | #define FR_EA_BIT 0x01 |
| 68 | |
| 69 | #define FR_CR_BIT 0x02000000 |
| 70 | #define FR_DE_BIT 0x00020000 |
| 71 | #define FR_BECN_BIT 0x00040000 |
| 72 | #define FR_FECN_BIT 0x00080000 |
| 73 | #define FR_SDLC_BIT 0x00000002 |
| 74 | |
| 75 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 76 | static const struct tok fr_header_flag_values[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 77 | { FR_CR_BIT, "C!" }, |
| 78 | { FR_DE_BIT, "DE" }, |
| 79 | { FR_BECN_BIT, "BECN" }, |
| 80 | { FR_FECN_BIT, "FECN" }, |
| 81 | { FR_SDLC_BIT, "sdlcore" }, |
| 82 | { 0, NULL } |
| 83 | }; |
| 84 | |
| 85 | /* FRF.15 / FRF.16 */ |
| 86 | #define MFR_B_BIT 0x80 |
| 87 | #define MFR_E_BIT 0x40 |
| 88 | #define MFR_C_BIT 0x20 |
| 89 | #define MFR_BEC_MASK (MFR_B_BIT | MFR_E_BIT | MFR_C_BIT) |
| 90 | #define MFR_CTRL_FRAME (MFR_B_BIT | MFR_E_BIT | MFR_C_BIT) |
| 91 | #define MFR_FRAG_FRAME (MFR_B_BIT | MFR_E_BIT ) |
| 92 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 93 | static const struct tok frf_flag_values[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 94 | { MFR_B_BIT, "Begin" }, |
| 95 | { MFR_E_BIT, "End" }, |
| 96 | { MFR_C_BIT, "Control" }, |
| 97 | { 0, NULL } |
| 98 | }; |
| 99 | |
| 100 | /* Finds out Q.922 address length, DLCI and flags. Returns 0 on success |
| 101 | * save the flags dep. on address length |
| 102 | */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 103 | static int parse_q922_addr(const u_char *p, u_int *dlci, |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 104 | u_int *addr_len, u_int8_t *flags) |
| 105 | { |
| 106 | if ((p[0] & FR_EA_BIT)) |
| 107 | return -1; |
| 108 | |
| 109 | *addr_len = 2; |
| 110 | *dlci = ((p[0] & 0xFC) << 2) | ((p[1] & 0xF0) >> 4); |
| 111 | |
| 112 | flags[0] = p[0] & 0x02; /* populate the first flag fields */ |
| 113 | flags[1] = p[1] & 0x0c; |
| 114 | flags[2] = 0; /* clear the rest of the flags */ |
| 115 | flags[3] = 0; |
| 116 | |
| 117 | if (p[1] & FR_EA_BIT) |
| 118 | return 0; /* 2-byte Q.922 address */ |
| 119 | |
| 120 | p += 2; |
| 121 | (*addr_len)++; /* 3- or 4-byte Q.922 address */ |
| 122 | if ((p[0] & FR_EA_BIT) == 0) { |
| 123 | *dlci = (*dlci << 7) | (p[0] >> 1); |
| 124 | (*addr_len)++; /* 4-byte Q.922 address */ |
| 125 | p++; |
| 126 | } |
| 127 | |
| 128 | if ((p[0] & FR_EA_BIT) == 0) |
| 129 | return -1; /* more than 4 bytes of Q.922 address? */ |
| 130 | |
| 131 | flags[3] = p[0] & 0x02; |
| 132 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 133 | *dlci = (*dlci << 6) | (p[0] >> 2); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 134 | |
| 135 | return 0; |
| 136 | } |
| 137 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 138 | char *q922_string(const u_char *p) { |
| 139 | |
| 140 | static u_int dlci, addr_len; |
| 141 | static u_int8_t flags[4]; |
| 142 | static char buffer[sizeof("DLCI xxxxxxxxxx")]; |
| 143 | memset(buffer, 0, sizeof(buffer)); |
| 144 | |
| 145 | if (parse_q922_addr(p, &dlci, &addr_len, flags) == 0){ |
| 146 | snprintf(buffer, sizeof(buffer), "DLCI %u", dlci); |
| 147 | } |
| 148 | |
| 149 | return buffer; |
| 150 | } |
| 151 | |
| 152 | |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 153 | /* Frame Relay packet structure, with flags and CRC removed |
| 154 | |
| 155 | +---------------------------+ |
| 156 | | Q.922 Address* | |
| 157 | +-- --+ |
| 158 | | | |
| 159 | +---------------------------+ |
| 160 | | Control (UI = 0x03) | |
| 161 | +---------------------------+ |
| 162 | | Optional Pad (0x00) | |
| 163 | +---------------------------+ |
| 164 | | NLPID | |
| 165 | +---------------------------+ |
| 166 | | . | |
| 167 | | . | |
| 168 | | . | |
| 169 | | Data | |
| 170 | | . | |
| 171 | | . | |
| 172 | +---------------------------+ |
| 173 | |
| 174 | * Q.922 addresses, as presently defined, are two octets and |
| 175 | contain a 10-bit DLCI. In some networks Q.922 addresses |
| 176 | may optionally be increased to three or four octets. |
| 177 | */ |
| 178 | |
| 179 | static u_int |
| 180 | fr_hdrlen(const u_char *p, u_int addr_len) |
| 181 | { |
| 182 | if (!p[addr_len + 1] /* pad exist */) |
| 183 | return addr_len + 1 /* UI */ + 1 /* pad */ + 1 /* NLPID */; |
| 184 | else |
| 185 | return addr_len + 1 /* UI */ + 1 /* NLPID */; |
| 186 | } |
| 187 | |
| 188 | static void |
| 189 | fr_hdr_print(int length, u_int addr_len, u_int dlci, u_int8_t *flags, u_int16_t nlpid) |
| 190 | { |
| 191 | if (qflag) { |
| 192 | (void)printf("Q.922, DLCI %u, length %u: ", |
| 193 | dlci, |
| 194 | length); |
| 195 | } else { |
| 196 | if (nlpid <= 0xff) /* if its smaller than 256 then its a NLPID */ |
| 197 | (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], NLPID %s (0x%02x), length %u: ", |
| 198 | addr_len, |
| 199 | dlci, |
| 200 | bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)), |
| 201 | tok2str(nlpid_values,"unknown", nlpid), |
| 202 | nlpid, |
| 203 | length); |
| 204 | else /* must be an ethertype */ |
| 205 | (void)printf("Q.922, hdr-len %u, DLCI %u, Flags [%s], cisco-ethertype %s (0x%04x), length %u: ", |
| 206 | addr_len, |
| 207 | dlci, |
| 208 | bittok2str(fr_header_flag_values, "none", EXTRACT_32BITS(flags)), |
| 209 | tok2str(ethertype_values, "unknown", nlpid), |
| 210 | nlpid, |
| 211 | length); |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | u_int |
| 216 | fr_if_print(const struct pcap_pkthdr *h, register const u_char *p) |
| 217 | { |
| 218 | register u_int length = h->len; |
| 219 | register u_int caplen = h->caplen; |
| 220 | |
| 221 | TCHECK2(*p, 4); /* minimum frame header length */ |
| 222 | |
| 223 | if ((length = fr_print(p, length)) == 0) |
| 224 | return (0); |
| 225 | else |
| 226 | return length; |
| 227 | trunc: |
| 228 | printf("[|fr]"); |
| 229 | return caplen; |
| 230 | } |
| 231 | |
| 232 | u_int |
| 233 | fr_print(register const u_char *p, u_int length) |
| 234 | { |
| 235 | u_int16_t extracted_ethertype; |
| 236 | u_int dlci; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 237 | u_int addr_len; |
| 238 | u_int16_t nlpid; |
| 239 | u_int hdr_len; |
| 240 | u_int8_t flags[4]; |
| 241 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 242 | if (parse_q922_addr(p, &dlci, &addr_len, flags)) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 243 | printf("Q.922, invalid address"); |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | TCHECK2(*p,addr_len+1+1); |
| 248 | hdr_len = fr_hdrlen(p, addr_len); |
| 249 | TCHECK2(*p,hdr_len); |
| 250 | |
| 251 | if (p[addr_len] != 0x03 && dlci != 0) { |
| 252 | |
| 253 | /* lets figure out if we have cisco style encapsulation: */ |
| 254 | extracted_ethertype = EXTRACT_16BITS(p+addr_len); |
| 255 | |
| 256 | if (eflag) |
| 257 | fr_hdr_print(length, addr_len, dlci, flags, extracted_ethertype); |
| 258 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 259 | if (ethertype_print(gndo, extracted_ethertype, |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 260 | p+addr_len+ETHERTYPE_LEN, |
| 261 | length-addr_len-ETHERTYPE_LEN, |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 262 | length-addr_len-ETHERTYPE_LEN) == 0) |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 263 | /* ether_type not known, probably it wasn't one */ |
| 264 | printf("UI %02x! ", p[addr_len]); |
| 265 | else |
| 266 | return hdr_len; |
| 267 | } |
| 268 | |
| 269 | if (!p[addr_len + 1]) { /* pad byte should be used with 3-byte Q.922 */ |
| 270 | if (addr_len != 3) |
| 271 | printf("Pad! "); |
| 272 | } else if (addr_len == 3) |
| 273 | printf("No pad! "); |
| 274 | |
| 275 | nlpid = p[hdr_len - 1]; |
| 276 | |
| 277 | if (eflag) |
| 278 | fr_hdr_print(length, addr_len, dlci, flags, nlpid); |
| 279 | p += hdr_len; |
| 280 | length -= hdr_len; |
| 281 | |
| 282 | switch (nlpid) { |
| 283 | case NLPID_IP: |
| 284 | ip_print(gndo, p, length); |
| 285 | break; |
| 286 | |
| 287 | #ifdef INET6 |
| 288 | case NLPID_IP6: |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 289 | ip6_print(gndo, p, length); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 290 | break; |
| 291 | #endif |
| 292 | case NLPID_CLNP: |
| 293 | case NLPID_ESIS: |
| 294 | case NLPID_ISIS: |
| 295 | isoclns_print(p-1, length+1, length+1); /* OSI printers need the NLPID field */ |
| 296 | break; |
| 297 | |
| 298 | case NLPID_SNAP: |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 299 | if (snap_print(p, length, length, 0) == 0) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 300 | /* ether_type not known, print raw packet */ |
| 301 | if (!eflag) |
| 302 | fr_hdr_print(length + hdr_len, hdr_len, |
| 303 | dlci, flags, nlpid); |
| 304 | if (!suppress_default_print) |
| 305 | default_print(p - hdr_len, length + hdr_len); |
| 306 | } |
| 307 | break; |
| 308 | |
| 309 | case NLPID_Q933: |
| 310 | q933_print(p, length); |
| 311 | break; |
| 312 | |
| 313 | case NLPID_MFR: |
| 314 | frf15_print(p, length); |
| 315 | break; |
| 316 | |
| 317 | case NLPID_PPP: |
| 318 | ppp_print(p, length); |
| 319 | break; |
| 320 | |
| 321 | default: |
| 322 | if (!eflag) |
| 323 | fr_hdr_print(length + hdr_len, addr_len, |
| 324 | dlci, flags, nlpid); |
| 325 | if (!xflag) |
| 326 | default_print(p, length); |
| 327 | } |
| 328 | |
| 329 | return hdr_len; |
| 330 | |
| 331 | trunc: |
| 332 | printf("[|fr]"); |
| 333 | return 0; |
| 334 | |
| 335 | } |
| 336 | |
| 337 | u_int |
| 338 | mfr_if_print(const struct pcap_pkthdr *h, register const u_char *p) |
| 339 | { |
| 340 | register u_int length = h->len; |
| 341 | register u_int caplen = h->caplen; |
| 342 | |
| 343 | TCHECK2(*p, 2); /* minimum frame header length */ |
| 344 | |
| 345 | if ((length = mfr_print(p, length)) == 0) |
| 346 | return (0); |
| 347 | else |
| 348 | return length; |
| 349 | trunc: |
| 350 | printf("[|mfr]"); |
| 351 | return caplen; |
| 352 | } |
| 353 | |
| 354 | |
| 355 | #define MFR_CTRL_MSG_ADD_LINK 1 |
| 356 | #define MFR_CTRL_MSG_ADD_LINK_ACK 2 |
| 357 | #define MFR_CTRL_MSG_ADD_LINK_REJ 3 |
| 358 | #define MFR_CTRL_MSG_HELLO 4 |
| 359 | #define MFR_CTRL_MSG_HELLO_ACK 5 |
| 360 | #define MFR_CTRL_MSG_REMOVE_LINK 6 |
| 361 | #define MFR_CTRL_MSG_REMOVE_LINK_ACK 7 |
| 362 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 363 | static const struct tok mfr_ctrl_msg_values[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 364 | { MFR_CTRL_MSG_ADD_LINK, "Add Link" }, |
| 365 | { MFR_CTRL_MSG_ADD_LINK_ACK, "Add Link ACK" }, |
| 366 | { MFR_CTRL_MSG_ADD_LINK_REJ, "Add Link Reject" }, |
| 367 | { MFR_CTRL_MSG_HELLO, "Hello" }, |
| 368 | { MFR_CTRL_MSG_HELLO_ACK, "Hello ACK" }, |
| 369 | { MFR_CTRL_MSG_REMOVE_LINK, "Remove Link" }, |
| 370 | { MFR_CTRL_MSG_REMOVE_LINK_ACK, "Remove Link ACK" }, |
| 371 | { 0, NULL } |
| 372 | }; |
| 373 | |
| 374 | #define MFR_CTRL_IE_BUNDLE_ID 1 |
| 375 | #define MFR_CTRL_IE_LINK_ID 2 |
| 376 | #define MFR_CTRL_IE_MAGIC_NUM 3 |
| 377 | #define MFR_CTRL_IE_TIMESTAMP 5 |
| 378 | #define MFR_CTRL_IE_VENDOR_EXT 6 |
| 379 | #define MFR_CTRL_IE_CAUSE 7 |
| 380 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 381 | static const struct tok mfr_ctrl_ie_values[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 382 | { MFR_CTRL_IE_BUNDLE_ID, "Bundle ID"}, |
| 383 | { MFR_CTRL_IE_LINK_ID, "Link ID"}, |
| 384 | { MFR_CTRL_IE_MAGIC_NUM, "Magic Number"}, |
| 385 | { MFR_CTRL_IE_TIMESTAMP, "Timestamp"}, |
| 386 | { MFR_CTRL_IE_VENDOR_EXT, "Vendor Extension"}, |
| 387 | { MFR_CTRL_IE_CAUSE, "Cause"}, |
| 388 | { 0, NULL } |
| 389 | }; |
| 390 | |
| 391 | #define MFR_ID_STRING_MAXLEN 50 |
| 392 | |
| 393 | struct ie_tlv_header_t { |
| 394 | u_int8_t ie_type; |
| 395 | u_int8_t ie_len; |
| 396 | }; |
| 397 | |
| 398 | u_int |
| 399 | mfr_print(register const u_char *p, u_int length) |
| 400 | { |
| 401 | u_int tlen,idx,hdr_len = 0; |
| 402 | u_int16_t sequence_num; |
| 403 | u_int8_t ie_type,ie_len; |
| 404 | const u_int8_t *tptr; |
| 405 | |
| 406 | |
| 407 | /* |
| 408 | * FRF.16 Link Integrity Control Frame |
| 409 | * |
| 410 | * 7 6 5 4 3 2 1 0 |
| 411 | * +----+----+----+----+----+----+----+----+ |
| 412 | * | B | E | C=1| 0 0 0 0 | EA | |
| 413 | * +----+----+----+----+----+----+----+----+ |
| 414 | * | 0 0 0 0 0 0 0 0 | |
| 415 | * +----+----+----+----+----+----+----+----+ |
| 416 | * | message type | |
| 417 | * +----+----+----+----+----+----+----+----+ |
| 418 | */ |
| 419 | |
| 420 | TCHECK2(*p, 4); /* minimum frame header length */ |
| 421 | |
| 422 | if ((p[0] & MFR_BEC_MASK) == MFR_CTRL_FRAME && p[1] == 0) { |
| 423 | printf("FRF.16 Control, Flags [%s], %s, length %u", |
| 424 | bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK)), |
| 425 | tok2str(mfr_ctrl_msg_values,"Unknown Message (0x%02x)",p[2]), |
| 426 | length); |
| 427 | tptr = p + 3; |
| 428 | tlen = length -3; |
| 429 | hdr_len = 3; |
| 430 | |
| 431 | if (!vflag) |
| 432 | return hdr_len; |
| 433 | |
| 434 | while (tlen>sizeof(struct ie_tlv_header_t)) { |
| 435 | TCHECK2(*tptr, sizeof(struct ie_tlv_header_t)); |
| 436 | ie_type=tptr[0]; |
| 437 | ie_len=tptr[1]; |
| 438 | |
| 439 | printf("\n\tIE %s (%u), length %u: ", |
| 440 | tok2str(mfr_ctrl_ie_values,"Unknown",ie_type), |
| 441 | ie_type, |
| 442 | ie_len); |
| 443 | |
| 444 | /* infinite loop check */ |
| 445 | if (ie_type == 0 || ie_len <= sizeof(struct ie_tlv_header_t)) |
| 446 | return hdr_len; |
| 447 | |
| 448 | TCHECK2(*tptr,ie_len); |
| 449 | tptr+=sizeof(struct ie_tlv_header_t); |
| 450 | /* tlv len includes header */ |
| 451 | ie_len-=sizeof(struct ie_tlv_header_t); |
| 452 | tlen-=sizeof(struct ie_tlv_header_t); |
| 453 | |
| 454 | switch (ie_type) { |
| 455 | |
| 456 | case MFR_CTRL_IE_MAGIC_NUM: |
| 457 | printf("0x%08x",EXTRACT_32BITS(tptr)); |
| 458 | break; |
| 459 | |
| 460 | case MFR_CTRL_IE_BUNDLE_ID: /* same message format */ |
| 461 | case MFR_CTRL_IE_LINK_ID: |
| 462 | for (idx = 0; idx < ie_len && idx < MFR_ID_STRING_MAXLEN; idx++) { |
| 463 | if (*(tptr+idx) != 0) /* don't print null termination */ |
| 464 | safeputchar(*(tptr+idx)); |
| 465 | else |
| 466 | break; |
| 467 | } |
| 468 | break; |
| 469 | |
| 470 | case MFR_CTRL_IE_TIMESTAMP: |
| 471 | if (ie_len == sizeof(struct timeval)) { |
| 472 | ts_print((const struct timeval *)tptr); |
| 473 | break; |
| 474 | } |
| 475 | /* fall through and hexdump if no unix timestamp */ |
| 476 | |
| 477 | /* |
| 478 | * FIXME those are the defined IEs that lack a decoder |
| 479 | * you are welcome to contribute code ;-) |
| 480 | */ |
| 481 | |
| 482 | case MFR_CTRL_IE_VENDOR_EXT: |
| 483 | case MFR_CTRL_IE_CAUSE: |
| 484 | |
| 485 | default: |
| 486 | if (vflag <= 1) |
| 487 | print_unknown_data(tptr,"\n\t ",ie_len); |
| 488 | break; |
| 489 | } |
| 490 | |
| 491 | /* do we want to see a hexdump of the IE ? */ |
| 492 | if (vflag > 1 ) |
| 493 | print_unknown_data(tptr,"\n\t ",ie_len); |
| 494 | |
| 495 | tlen-=ie_len; |
| 496 | tptr+=ie_len; |
| 497 | } |
| 498 | return hdr_len; |
| 499 | } |
| 500 | /* |
| 501 | * FRF.16 Fragmentation Frame |
| 502 | * |
| 503 | * 7 6 5 4 3 2 1 0 |
| 504 | * +----+----+----+----+----+----+----+----+ |
| 505 | * | B | E | C=0|seq. (high 4 bits) | EA | |
| 506 | * +----+----+----+----+----+----+----+----+ |
| 507 | * | sequence (low 8 bits) | |
| 508 | * +----+----+----+----+----+----+----+----+ |
| 509 | * | DLCI (6 bits) | CR | EA | |
| 510 | * +----+----+----+----+----+----+----+----+ |
| 511 | * | DLCI (4 bits) |FECN|BECN| DE | EA | |
| 512 | * +----+----+----+----+----+----+----+----+ |
| 513 | */ |
| 514 | |
| 515 | sequence_num = (p[0]&0x1e)<<7 | p[1]; |
| 516 | /* whole packet or first fragment ? */ |
| 517 | if ((p[0] & MFR_BEC_MASK) == MFR_FRAG_FRAME || |
| 518 | (p[0] & MFR_BEC_MASK) == MFR_B_BIT) { |
| 519 | printf("FRF.16 Frag, seq %u, Flags [%s], ", |
| 520 | sequence_num, |
| 521 | bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK))); |
| 522 | hdr_len = 2; |
| 523 | fr_print(p+hdr_len,length-hdr_len); |
| 524 | return hdr_len; |
| 525 | } |
| 526 | |
| 527 | /* must be a middle or the last fragment */ |
| 528 | printf("FRF.16 Frag, seq %u, Flags [%s]", |
| 529 | sequence_num, |
| 530 | bittok2str(frf_flag_values,"none",(p[0] & MFR_BEC_MASK))); |
| 531 | print_unknown_data(p,"\n\t",length); |
| 532 | |
| 533 | return hdr_len; |
| 534 | |
| 535 | trunc: |
| 536 | printf("[|mfr]"); |
| 537 | return length; |
| 538 | } |
| 539 | |
| 540 | /* an NLPID of 0xb1 indicates a 2-byte |
| 541 | * FRF.15 header |
| 542 | * |
| 543 | * 7 6 5 4 3 2 1 0 |
| 544 | * +----+----+----+----+----+----+----+----+ |
| 545 | * ~ Q.922 header ~ |
| 546 | * +----+----+----+----+----+----+----+----+ |
| 547 | * | NLPID (8 bits) | NLPID=0xb1 |
| 548 | * +----+----+----+----+----+----+----+----+ |
| 549 | * | B | E | C |seq. (high 4 bits) | R | |
| 550 | * +----+----+----+----+----+----+----+----+ |
| 551 | * | sequence (low 8 bits) | |
| 552 | * +----+----+----+----+----+----+----+----+ |
| 553 | */ |
| 554 | |
| 555 | #define FR_FRF15_FRAGTYPE 0x01 |
| 556 | |
| 557 | static void |
| 558 | frf15_print (const u_char *p, u_int length) { |
| 559 | |
| 560 | u_int16_t sequence_num, flags; |
| 561 | |
| 562 | flags = p[0]&MFR_BEC_MASK; |
| 563 | sequence_num = (p[0]&0x1e)<<7 | p[1]; |
| 564 | |
| 565 | printf("FRF.15, seq 0x%03x, Flags [%s],%s Fragmentation, length %u", |
| 566 | sequence_num, |
| 567 | bittok2str(frf_flag_values,"none",flags), |
| 568 | p[0]&FR_FRF15_FRAGTYPE ? "Interface" : "End-to-End", |
| 569 | length); |
| 570 | |
| 571 | /* TODO: |
| 572 | * depending on all permutations of the B, E and C bit |
| 573 | * dig as deep as we can - e.g. on the first (B) fragment |
| 574 | * there is enough payload to print the IP header |
| 575 | * on non (B) fragments it depends if the fragmentation |
| 576 | * model is end-to-end or interface based wether we want to print |
| 577 | * another Q.922 header |
| 578 | */ |
| 579 | |
| 580 | } |
| 581 | |
| 582 | /* |
| 583 | * Q.933 decoding portion for framerelay specific. |
| 584 | */ |
| 585 | |
| 586 | /* Q.933 packet format |
| 587 | Format of Other Protocols |
| 588 | using Q.933 NLPID |
| 589 | +-------------------------------+ |
| 590 | | Q.922 Address | |
| 591 | +---------------+---------------+ |
| 592 | |Control 0x03 | NLPID 0x08 | |
| 593 | +---------------+---------------+ |
| 594 | | L2 Protocol ID | |
| 595 | | octet 1 | octet 2 | |
| 596 | +-------------------------------+ |
| 597 | | L3 Protocol ID | |
| 598 | | octet 2 | octet 2 | |
| 599 | +-------------------------------+ |
| 600 | | Protocol Data | |
| 601 | +-------------------------------+ |
| 602 | | FCS | |
| 603 | +-------------------------------+ |
| 604 | */ |
| 605 | |
| 606 | /* L2 (Octet 1)- Call Reference Usually is 0x0 */ |
| 607 | |
| 608 | /* |
| 609 | * L2 (Octet 2)- Message Types definition 1 byte long. |
| 610 | */ |
| 611 | /* Call Establish */ |
| 612 | #define MSG_TYPE_ESC_TO_NATIONAL 0x00 |
| 613 | #define MSG_TYPE_ALERT 0x01 |
| 614 | #define MSG_TYPE_CALL_PROCEEDING 0x02 |
| 615 | #define MSG_TYPE_CONNECT 0x07 |
| 616 | #define MSG_TYPE_CONNECT_ACK 0x0F |
| 617 | #define MSG_TYPE_PROGRESS 0x03 |
| 618 | #define MSG_TYPE_SETUP 0x05 |
| 619 | /* Call Clear */ |
| 620 | #define MSG_TYPE_DISCONNECT 0x45 |
| 621 | #define MSG_TYPE_RELEASE 0x4D |
| 622 | #define MSG_TYPE_RELEASE_COMPLETE 0x5A |
| 623 | #define MSG_TYPE_RESTART 0x46 |
| 624 | #define MSG_TYPE_RESTART_ACK 0x4E |
| 625 | /* Status */ |
| 626 | #define MSG_TYPE_STATUS 0x7D |
| 627 | #define MSG_TYPE_STATUS_ENQ 0x75 |
| 628 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 629 | static const struct tok fr_q933_msg_values[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 630 | { MSG_TYPE_ESC_TO_NATIONAL, "ESC to National" }, |
| 631 | { MSG_TYPE_ALERT, "Alert" }, |
| 632 | { MSG_TYPE_CALL_PROCEEDING, "Call proceeding" }, |
| 633 | { MSG_TYPE_CONNECT, "Connect" }, |
| 634 | { MSG_TYPE_CONNECT_ACK, "Connect ACK" }, |
| 635 | { MSG_TYPE_PROGRESS, "Progress" }, |
| 636 | { MSG_TYPE_SETUP, "Setup" }, |
| 637 | { MSG_TYPE_DISCONNECT, "Disconnect" }, |
| 638 | { MSG_TYPE_RELEASE, "Release" }, |
| 639 | { MSG_TYPE_RELEASE_COMPLETE, "Release Complete" }, |
| 640 | { MSG_TYPE_RESTART, "Restart" }, |
| 641 | { MSG_TYPE_RESTART_ACK, "Restart ACK" }, |
| 642 | { MSG_TYPE_STATUS, "Status Reply" }, |
| 643 | { MSG_TYPE_STATUS_ENQ, "Status Enquiry" }, |
| 644 | { 0, NULL } |
| 645 | }; |
| 646 | |
| 647 | #define MSG_ANSI_LOCKING_SHIFT 0x95 |
| 648 | |
| 649 | #define FR_LMI_ANSI_REPORT_TYPE_IE 0x01 |
| 650 | #define FR_LMI_ANSI_LINK_VERIFY_IE_91 0x19 /* details? */ |
| 651 | #define FR_LMI_ANSI_LINK_VERIFY_IE 0x03 |
| 652 | #define FR_LMI_ANSI_PVC_STATUS_IE 0x07 |
| 653 | |
| 654 | #define FR_LMI_CCITT_REPORT_TYPE_IE 0x51 |
| 655 | #define FR_LMI_CCITT_LINK_VERIFY_IE 0x53 |
| 656 | #define FR_LMI_CCITT_PVC_STATUS_IE 0x57 |
| 657 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 658 | static const struct tok fr_q933_ie_values_codeset5[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 659 | { FR_LMI_ANSI_REPORT_TYPE_IE, "ANSI Report Type" }, |
| 660 | { FR_LMI_ANSI_LINK_VERIFY_IE_91, "ANSI Link Verify" }, |
| 661 | { FR_LMI_ANSI_LINK_VERIFY_IE, "ANSI Link Verify" }, |
| 662 | { FR_LMI_ANSI_PVC_STATUS_IE, "ANSI PVC Status" }, |
| 663 | { FR_LMI_CCITT_REPORT_TYPE_IE, "CCITT Report Type" }, |
| 664 | { FR_LMI_CCITT_LINK_VERIFY_IE, "CCITT Link Verify" }, |
| 665 | { FR_LMI_CCITT_PVC_STATUS_IE, "CCITT PVC Status" }, |
| 666 | { 0, NULL } |
| 667 | }; |
| 668 | |
| 669 | #define FR_LMI_REPORT_TYPE_IE_FULL_STATUS 0 |
| 670 | #define FR_LMI_REPORT_TYPE_IE_LINK_VERIFY 1 |
| 671 | #define FR_LMI_REPORT_TYPE_IE_ASYNC_PVC 2 |
| 672 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 673 | static const struct tok fr_lmi_report_type_ie_values[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 674 | { FR_LMI_REPORT_TYPE_IE_FULL_STATUS, "Full Status" }, |
| 675 | { FR_LMI_REPORT_TYPE_IE_LINK_VERIFY, "Link verify" }, |
| 676 | { FR_LMI_REPORT_TYPE_IE_ASYNC_PVC, "Async PVC Status" }, |
| 677 | { 0, NULL } |
| 678 | }; |
| 679 | |
| 680 | /* array of 16 codepages - currently we only support codepage 1,5 */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 681 | static const struct tok *fr_q933_ie_codesets[] = { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 682 | NULL, |
| 683 | fr_q933_ie_values_codeset5, |
| 684 | NULL, |
| 685 | NULL, |
| 686 | NULL, |
| 687 | fr_q933_ie_values_codeset5, |
| 688 | NULL, |
| 689 | NULL, |
| 690 | NULL, |
| 691 | NULL, |
| 692 | NULL, |
| 693 | NULL, |
| 694 | NULL, |
| 695 | NULL, |
| 696 | NULL, |
| 697 | NULL |
| 698 | }; |
| 699 | |
| 700 | static int fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p, |
| 701 | const u_char *p); |
| 702 | |
| 703 | typedef int (*codeset_pr_func_t)(const struct ie_tlv_header_t *ie_p, |
| 704 | const u_char *p); |
| 705 | |
| 706 | /* array of 16 codepages - currently we only support codepage 1,5 */ |
| 707 | static codeset_pr_func_t fr_q933_print_ie_codeset[] = { |
| 708 | NULL, |
| 709 | fr_q933_print_ie_codeset5, |
| 710 | NULL, |
| 711 | NULL, |
| 712 | NULL, |
| 713 | fr_q933_print_ie_codeset5, |
| 714 | NULL, |
| 715 | NULL, |
| 716 | NULL, |
| 717 | NULL, |
| 718 | NULL, |
| 719 | NULL, |
| 720 | NULL, |
| 721 | NULL, |
| 722 | NULL, |
| 723 | NULL |
| 724 | }; |
| 725 | |
| 726 | void |
| 727 | q933_print(const u_char *p, u_int length) |
| 728 | { |
| 729 | const u_char *ptemp = p; |
| 730 | struct ie_tlv_header_t *ie_p; |
| 731 | int olen; |
| 732 | int is_ansi = 0; |
| 733 | u_int codeset; |
| 734 | u_int ie_is_known = 0; |
| 735 | |
| 736 | if (length < 9) { /* shortest: Q.933a LINK VERIFY */ |
| 737 | printf("[|q.933]"); |
| 738 | return; |
| 739 | } |
| 740 | |
| 741 | codeset = p[2]&0x0f; /* extract the codeset */ |
| 742 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 743 | if (p[2] == MSG_ANSI_LOCKING_SHIFT) { |
| 744 | is_ansi = 1; |
| 745 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 746 | |
| 747 | printf("%s", eflag ? "" : "Q.933, "); |
| 748 | |
| 749 | /* printing out header part */ |
| 750 | printf("%s, codeset %u", is_ansi ? "ANSI" : "CCITT", codeset); |
| 751 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 752 | if (p[0]) { |
| 753 | printf(", Call Ref: 0x%02x", p[0]); |
| 754 | } |
| 755 | if (vflag) { |
| 756 | printf(", %s (0x%02x), length %u", |
| 757 | tok2str(fr_q933_msg_values, |
| 758 | "unknown message", p[1]), |
| 759 | p[1], |
| 760 | length); |
| 761 | } else { |
| 762 | printf(", %s", |
| 763 | tok2str(fr_q933_msg_values, |
| 764 | "unknown message 0x%02x", p[1])); |
| 765 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 766 | |
| 767 | olen = length; /* preserve the original length for non verbose mode */ |
| 768 | |
| 769 | if (length < (u_int)(2 - is_ansi)) { |
| 770 | printf("[|q.933]"); |
| 771 | return; |
| 772 | } |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 773 | length -= 2 + is_ansi; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 774 | ptemp += 2 + is_ansi; |
| 775 | |
| 776 | /* Loop through the rest of IE */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 777 | while (length > sizeof(struct ie_tlv_header_t)) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 778 | ie_p = (struct ie_tlv_header_t *)ptemp; |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 779 | if (length < sizeof(struct ie_tlv_header_t) || |
| 780 | length < sizeof(struct ie_tlv_header_t) + ie_p->ie_len) { |
| 781 | if (vflag) { /* not bark if there is just a trailer */ |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 782 | printf("\n[|q.933]"); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 783 | } else { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 784 | printf(", length %u",olen); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 785 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 786 | return; |
| 787 | } |
| 788 | |
| 789 | /* lets do the full IE parsing only in verbose mode |
| 790 | * however some IEs (DLCI Status, Link Verify) |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 791 | * are also interestting in non-verbose mode */ |
| 792 | if (vflag) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 793 | printf("\n\t%s IE (0x%02x), length %u: ", |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 794 | tok2str(fr_q933_ie_codesets[codeset], |
| 795 | "unknown", ie_p->ie_type), |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 796 | ie_p->ie_type, |
| 797 | ie_p->ie_len); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 798 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 799 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 800 | /* sanity check */ |
| 801 | if (ie_p->ie_type == 0 || ie_p->ie_len == 0) { |
| 802 | return; |
| 803 | } |
| 804 | |
| 805 | if (fr_q933_print_ie_codeset[codeset] != NULL) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 806 | ie_is_known = fr_q933_print_ie_codeset[codeset](ie_p, ptemp); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 807 | } |
| 808 | |
| 809 | if (vflag >= 1 && !ie_is_known) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 810 | print_unknown_data(ptemp+2,"\n\t",ie_p->ie_len); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 811 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 812 | |
| 813 | /* do we want to see a hexdump of the IE ? */ |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 814 | if (vflag> 1 && ie_is_known) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 815 | print_unknown_data(ptemp+2,"\n\t ",ie_p->ie_len); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 816 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 817 | |
| 818 | length = length - ie_p->ie_len - 2; |
| 819 | ptemp = ptemp + ie_p->ie_len + 2; |
| 820 | } |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 821 | if (!vflag) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 822 | printf(", length %u",olen); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 823 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 824 | } |
| 825 | |
| 826 | static int |
| 827 | fr_q933_print_ie_codeset5(const struct ie_tlv_header_t *ie_p, const u_char *p) |
| 828 | { |
| 829 | u_int dlci; |
| 830 | |
| 831 | switch (ie_p->ie_type) { |
| 832 | |
| 833 | case FR_LMI_ANSI_REPORT_TYPE_IE: /* fall through */ |
| 834 | case FR_LMI_CCITT_REPORT_TYPE_IE: |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 835 | if (vflag) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 836 | printf("%s (%u)", |
| 837 | tok2str(fr_lmi_report_type_ie_values,"unknown",p[2]), |
| 838 | p[2]); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 839 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 840 | return 1; |
| 841 | |
| 842 | case FR_LMI_ANSI_LINK_VERIFY_IE: /* fall through */ |
| 843 | case FR_LMI_CCITT_LINK_VERIFY_IE: |
| 844 | case FR_LMI_ANSI_LINK_VERIFY_IE_91: |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 845 | if (!vflag) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 846 | printf(", "); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 847 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 848 | printf("TX Seq: %3d, RX Seq: %3d", p[2], p[3]); |
| 849 | return 1; |
| 850 | |
| 851 | case FR_LMI_ANSI_PVC_STATUS_IE: /* fall through */ |
| 852 | case FR_LMI_CCITT_PVC_STATUS_IE: |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 853 | if (!vflag) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 854 | printf(", "); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 855 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 856 | /* now parse the DLCI information element. */ |
| 857 | if ((ie_p->ie_len < 3) || |
| 858 | (p[2] & 0x80) || |
| 859 | ((ie_p->ie_len == 3) && !(p[3] & 0x80)) || |
| 860 | ((ie_p->ie_len == 4) && ((p[3] & 0x80) || !(p[4] & 0x80))) || |
| 861 | ((ie_p->ie_len == 5) && ((p[3] & 0x80) || (p[4] & 0x80) || |
| 862 | !(p[5] & 0x80))) || |
| 863 | (ie_p->ie_len > 5) || |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 864 | !(p[ie_p->ie_len + 1] & 0x80)) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 865 | printf("Invalid DLCI IE"); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 866 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 867 | |
| 868 | dlci = ((p[2] & 0x3F) << 4) | ((p[3] & 0x78) >> 3); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 869 | if (ie_p->ie_len == 4) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 870 | dlci = (dlci << 6) | ((p[4] & 0x7E) >> 1); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 871 | } |
| 872 | else if (ie_p->ie_len == 5) { |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 873 | dlci = (dlci << 13) | (p[4] & 0x7F) | ((p[5] & 0x7E) >> 1); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 874 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 875 | |
| 876 | printf("DLCI %u: status %s%s", dlci, |
| 877 | p[ie_p->ie_len + 1] & 0x8 ? "New, " : "", |
| 878 | p[ie_p->ie_len + 1] & 0x2 ? "Active" : "Inactive"); |
| 879 | return 1; |
| 880 | } |
| 881 | |
| 882 | return 0; |
| 883 | } |