1 /* 2 * Copyright (c) 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 #include <sys/cdefs.h> 23 #ifndef lint 24 #if 0 25 static const char rcsid[] _U_ = 26 "@(#) Header: /tcpdump/master/tcpdump/print-wb.c,v 1.33 2004-03-24 04:06:28 guy Exp (LBL)"; 27 #else 28 __RCSID("$NetBSD: print-wb.c,v 1.2 2010/12/05 05:11:31 christos Exp $"); 29 #endif 30 #endif 31 32 #ifdef HAVE_CONFIG_H 33 #include "config.h" 34 #endif 35 36 #include <tcpdump-stdinc.h> 37 38 #include <stdio.h> 39 40 #include "interface.h" 41 #include "addrtoname.h" 42 #include "extract.h" 43 44 /* XXX need to add byte-swapping macros! */ 45 /* XXX - you mean like the ones in "extract.h"? */ 46 47 /* 48 * Largest packet size. Everything should fit within this space. 49 * For instance, multiline objects are sent piecewise. 50 */ 51 #define MAXFRAMESIZE 1024 52 53 /* 54 * Multiple drawing ops can be sent in one packet. Each one starts on a 55 * an even multiple of DOP_ALIGN bytes, which must be a power of two. 56 */ 57 #define DOP_ALIGN 4 58 #define DOP_ROUNDUP(x) ((((int)(x)) + (DOP_ALIGN - 1)) & ~(DOP_ALIGN - 1)) 59 #define DOP_NEXT(d)\ 60 ((struct dophdr *)((u_char *)(d) + \ 61 DOP_ROUNDUP(EXTRACT_16BITS(&(d)->dh_len) + sizeof(*(d))))) 62 63 /* 64 * Format of the whiteboard packet header. 65 * The transport level header. 66 */ 67 struct pkt_hdr { 68 u_int32_t ph_src; /* site id of source */ 69 u_int32_t ph_ts; /* time stamp (for skew computation) */ 70 u_int16_t ph_version; /* version number */ 71 u_char ph_type; /* message type */ 72 u_char ph_flags; /* message flags */ 73 }; 74 75 /* Packet types */ 76 #define PT_DRAWOP 0 /* drawing operation */ 77 #define PT_ID 1 /* announcement packet */ 78 #define PT_RREQ 2 /* repair request */ 79 #define PT_RREP 3 /* repair reply */ 80 #define PT_KILL 4 /* terminate participation */ 81 #define PT_PREQ 5 /* page vector request */ 82 #define PT_PREP 7 /* page vector reply */ 83 84 #ifdef PF_USER 85 #undef PF_USER /* {Digital,Tru64} UNIX define this, alas */ 86 #endif 87 88 /* flags */ 89 #define PF_USER 0x01 /* hint that packet has interactive data */ 90 #define PF_VIS 0x02 /* only visible ops wanted */ 91 92 struct PageID { 93 u_int32_t p_sid; /* session id of initiator */ 94 u_int32_t p_uid; /* page number */ 95 }; 96 97 struct dophdr { 98 u_int32_t dh_ts; /* sender's timestamp */ 99 u_int16_t dh_len; /* body length */ 100 u_char dh_flags; 101 u_char dh_type; /* body type */ 102 /* body follows */ 103 }; 104 /* 105 * Drawing op sub-types. 106 */ 107 #define DT_RECT 2 108 #define DT_LINE 3 109 #define DT_ML 4 110 #define DT_DEL 5 111 #define DT_XFORM 6 112 #define DT_ELL 7 113 #define DT_CHAR 8 114 #define DT_STR 9 115 #define DT_NOP 10 116 #define DT_PSCODE 11 117 #define DT_PSCOMP 12 118 #define DT_REF 13 119 #define DT_SKIP 14 120 #define DT_HOLE 15 121 #define DT_MAXTYPE 15 122 123 /* 124 * A drawing operation. 125 */ 126 struct pkt_dop { 127 struct PageID pd_page; /* page that operations apply to */ 128 u_int32_t pd_sseq; /* start sequence number */ 129 u_int32_t pd_eseq; /* end sequence number */ 130 /* drawing ops follow */ 131 }; 132 133 /* 134 * A repair request. 135 */ 136 struct pkt_rreq { 137 u_int32_t pr_id; /* source id of drawops to be repaired */ 138 struct PageID pr_page; /* page of drawops */ 139 u_int32_t pr_sseq; /* start seqno */ 140 u_int32_t pr_eseq; /* end seqno */ 141 }; 142 143 /* 144 * A repair reply. 145 */ 146 struct pkt_rrep { 147 u_int32_t pr_id; /* original site id of ops */ 148 struct pkt_dop pr_dop; 149 /* drawing ops follow */ 150 }; 151 152 struct id_off { 153 u_int32_t id; 154 u_int32_t off; 155 }; 156 157 struct pgstate { 158 u_int32_t slot; 159 struct PageID page; 160 u_int16_t nid; 161 u_int16_t rsvd; 162 /* seqptr's */ 163 }; 164 165 /* 166 * An announcement packet. 167 */ 168 struct pkt_id { 169 u_int32_t pi_mslot; 170 struct PageID pi_mpage; /* current page */ 171 struct pgstate pi_ps; 172 /* seqptr's */ 173 /* null-terminated site name */ 174 }; 175 176 struct pkt_preq { 177 struct PageID pp_page; 178 u_int32_t pp_low; 179 u_int32_t pp_high; 180 }; 181 182 struct pkt_prep { 183 u_int32_t pp_n; /* size of pageid array */ 184 /* pgstate's follow */ 185 }; 186 187 static int 188 wb_id(const struct pkt_id *id, u_int len) 189 { 190 int i; 191 const char *cp; 192 const struct id_off *io; 193 char c; 194 int nid; 195 196 printf(" wb-id:"); 197 if (len < sizeof(*id) || (u_char *)(id + 1) > snapend) 198 return (-1); 199 len -= sizeof(*id); 200 201 printf(" %u/%s:%u (max %u/%s:%u) ", 202 EXTRACT_32BITS(&id->pi_ps.slot), 203 ipaddr_string(&id->pi_ps.page.p_sid), 204 EXTRACT_32BITS(&id->pi_ps.page.p_uid), 205 EXTRACT_32BITS(&id->pi_mslot), 206 ipaddr_string(&id->pi_mpage.p_sid), 207 EXTRACT_32BITS(&id->pi_mpage.p_uid)); 208 209 nid = EXTRACT_16BITS(&id->pi_ps.nid); 210 len -= sizeof(*io) * nid; 211 io = (struct id_off *)(id + 1); 212 cp = (char *)(io + nid); 213 if ((u_char *)cp + len <= snapend) { 214 putchar('"'); 215 (void)fn_print((u_char *)cp, (u_char *)cp + len); 216 putchar('"'); 217 } 218 219 c = '<'; 220 for (i = 0; i < nid && (u_char *)(io + 1) <= snapend; ++io, ++i) { 221 printf("%c%s:%u", 222 c, ipaddr_string(&io->id), EXTRACT_32BITS(&io->off)); 223 c = ','; 224 } 225 if (i >= nid) { 226 printf(">"); 227 return (0); 228 } 229 return (-1); 230 } 231 232 static int 233 wb_rreq(const struct pkt_rreq *rreq, u_int len) 234 { 235 printf(" wb-rreq:"); 236 if (len < sizeof(*rreq) || (u_char *)(rreq + 1) > snapend) 237 return (-1); 238 239 printf(" please repair %s %s:%u<%u:%u>", 240 ipaddr_string(&rreq->pr_id), 241 ipaddr_string(&rreq->pr_page.p_sid), 242 EXTRACT_32BITS(&rreq->pr_page.p_uid), 243 EXTRACT_32BITS(&rreq->pr_sseq), 244 EXTRACT_32BITS(&rreq->pr_eseq)); 245 return (0); 246 } 247 248 static int 249 wb_preq(const struct pkt_preq *preq, u_int len) 250 { 251 printf(" wb-preq:"); 252 if (len < sizeof(*preq) || (u_char *)(preq + 1) > snapend) 253 return (-1); 254 255 printf(" need %u/%s:%u", 256 EXTRACT_32BITS(&preq->pp_low), 257 ipaddr_string(&preq->pp_page.p_sid), 258 EXTRACT_32BITS(&preq->pp_page.p_uid)); 259 return (0); 260 } 261 262 static int 263 wb_prep(const struct pkt_prep *prep, u_int len) 264 { 265 int n; 266 const struct pgstate *ps; 267 const u_char *ep = snapend; 268 269 printf(" wb-prep:"); 270 if (len < sizeof(*prep)) { 271 return (-1); 272 } 273 n = EXTRACT_32BITS(&prep->pp_n); 274 ps = (const struct pgstate *)(prep + 1); 275 while (--n >= 0 && (u_char *)(ps + 1) <= ep) { 276 const struct id_off *io, *ie; 277 char c = '<'; 278 279 printf(" %u/%s:%u", 280 EXTRACT_32BITS(&ps->slot), 281 ipaddr_string(&ps->page.p_sid), 282 EXTRACT_32BITS(&ps->page.p_uid)); 283 io = (struct id_off *)(ps + 1); 284 for (ie = io + ps->nid; io < ie && (u_char *)(io + 1) <= ep; ++io) { 285 printf("%c%s:%u", c, ipaddr_string(&io->id), 286 EXTRACT_32BITS(&io->off)); 287 c = ','; 288 } 289 printf(">"); 290 ps = (struct pgstate *)io; 291 } 292 return ((u_char *)ps <= ep? 0 : -1); 293 } 294 295 296 const char *dopstr[] = { 297 "dop-0!", 298 "dop-1!", 299 "RECT", 300 "LINE", 301 "ML", 302 "DEL", 303 "XFORM", 304 "ELL", 305 "CHAR", 306 "STR", 307 "NOP", 308 "PSCODE", 309 "PSCOMP", 310 "REF", 311 "SKIP", 312 "HOLE", 313 }; 314 315 static int 316 wb_dops(const struct dophdr *dh, u_int32_t ss, u_int32_t es) 317 { 318 printf(" <"); 319 for ( ; ss <= es; ++ss) { 320 register int t = dh->dh_type; 321 322 if (t > DT_MAXTYPE) 323 printf(" dop-%d!", t); 324 else { 325 printf(" %s", dopstr[t]); 326 if (t == DT_SKIP || t == DT_HOLE) { 327 u_int32_t ts = EXTRACT_32BITS(&dh->dh_ts); 328 printf("%d", ts - ss + 1); 329 if (ss > ts || ts > es) { 330 printf("[|]"); 331 if (ts < ss) 332 return (0); 333 } 334 ss = ts; 335 } 336 } 337 dh = DOP_NEXT(dh); 338 if ((u_char *)dh > snapend) { 339 printf("[|wb]"); 340 break; 341 } 342 } 343 printf(" >"); 344 return (0); 345 } 346 347 static int 348 wb_rrep(const struct pkt_rrep *rrep, u_int len) 349 { 350 const struct pkt_dop *dop = &rrep->pr_dop; 351 352 printf(" wb-rrep:"); 353 if (len < sizeof(*rrep) || (u_char *)(rrep + 1) > snapend) 354 return (-1); 355 len -= sizeof(*rrep); 356 357 printf(" for %s %s:%u<%u:%u>", 358 ipaddr_string(&rrep->pr_id), 359 ipaddr_string(&dop->pd_page.p_sid), 360 EXTRACT_32BITS(&dop->pd_page.p_uid), 361 EXTRACT_32BITS(&dop->pd_sseq), 362 EXTRACT_32BITS(&dop->pd_eseq)); 363 364 if (vflag) 365 return (wb_dops((const struct dophdr *)(dop + 1), 366 EXTRACT_32BITS(&dop->pd_sseq), 367 EXTRACT_32BITS(&dop->pd_eseq))); 368 return (0); 369 } 370 371 static int 372 wb_drawop(const struct pkt_dop *dop, u_int len) 373 { 374 printf(" wb-dop:"); 375 if (len < sizeof(*dop) || (u_char *)(dop + 1) > snapend) 376 return (-1); 377 len -= sizeof(*dop); 378 379 printf(" %s:%u<%u:%u>", 380 ipaddr_string(&dop->pd_page.p_sid), 381 EXTRACT_32BITS(&dop->pd_page.p_uid), 382 EXTRACT_32BITS(&dop->pd_sseq), 383 EXTRACT_32BITS(&dop->pd_eseq)); 384 385 if (vflag) 386 return (wb_dops((const struct dophdr *)(dop + 1), 387 EXTRACT_32BITS(&dop->pd_sseq), 388 EXTRACT_32BITS(&dop->pd_eseq))); 389 return (0); 390 } 391 392 /* 393 * Print whiteboard multicast packets. 394 */ 395 void 396 wb_print(register const void *hdr, register u_int len) 397 { 398 register const struct pkt_hdr *ph; 399 400 ph = (const struct pkt_hdr *)hdr; 401 if (len < sizeof(*ph) || (u_char *)(ph + 1) > snapend) { 402 printf("[|wb]"); 403 return; 404 } 405 len -= sizeof(*ph); 406 407 if (ph->ph_flags) 408 printf("*"); 409 switch (ph->ph_type) { 410 411 case PT_KILL: 412 printf(" wb-kill"); 413 return; 414 415 case PT_ID: 416 if (wb_id((struct pkt_id *)(ph + 1), len) >= 0) 417 return; 418 break; 419 420 case PT_RREQ: 421 if (wb_rreq((struct pkt_rreq *)(ph + 1), len) >= 0) 422 return; 423 break; 424 425 case PT_RREP: 426 if (wb_rrep((struct pkt_rrep *)(ph + 1), len) >= 0) 427 return; 428 break; 429 430 case PT_DRAWOP: 431 if (wb_drawop((struct pkt_dop *)(ph + 1), len) >= 0) 432 return; 433 break; 434 435 case PT_PREQ: 436 if (wb_preq((struct pkt_preq *)(ph + 1), len) >= 0) 437 return; 438 break; 439 440 case PT_PREP: 441 if (wb_prep((struct pkt_prep *)(ph + 1), len) >= 0) 442 return; 443 break; 444 445 default: 446 printf(" wb-%d!", ph->ph_type); 447 return; 448 } 449 } 450