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