print-wb.c revision 1.11
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 __RCSID("$NetBSD: print-wb.c,v 1.11 2023/08/17 20:19:40 christos Exp $"); 25 #endif 26 27 /* \summary: White Board printer */ 28 29 #ifdef HAVE_CONFIG_H 30 #include <config.h> 31 #endif 32 33 #include "netdissect-stdinc.h" 34 35 #define ND_LONGJMP_FROM_TCHECK 36 #include "netdissect.h" 37 #include "addrtoname.h" 38 #include "extract.h" 39 40 41 #if 0 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 #endif 48 49 /* 50 * Multiple drawing ops can be sent in one packet. Each one starts on a 51 * an even multiple of DOP_ALIGN bytes, which must be a power of two. 52 */ 53 #define DOP_ALIGN 4 54 #define DOP_ROUNDUP(x) roundup2(x, DOP_ALIGN) 55 #define DOP_NEXT(d)\ 56 ((const struct dophdr *)((const u_char *)(d) + \ 57 DOP_ROUNDUP(GET_BE_U_2((d)->dh_len) + sizeof(*(d))))) 58 59 /* 60 * Format of the whiteboard packet header. 61 * The transport level header. 62 */ 63 struct pkt_hdr { 64 nd_uint32_t ph_src; /* site id of source */ 65 nd_uint32_t ph_ts; /* time stamp (for skew computation) */ 66 nd_uint16_t ph_version; /* version number */ 67 nd_uint8_t ph_type; /* message type */ 68 nd_uint8_t ph_flags; /* message flags */ 69 }; 70 71 /* Packet types */ 72 #define PT_DRAWOP 0 /* drawing operation */ 73 #define PT_ID 1 /* announcement packet */ 74 #define PT_RREQ 2 /* repair request */ 75 #define PT_RREP 3 /* repair reply */ 76 #define PT_KILL 4 /* terminate participation */ 77 #define PT_PREQ 5 /* page vector request */ 78 #define PT_PREP 7 /* page vector reply */ 79 80 #if 0 81 #ifdef PF_USER 82 #undef PF_USER /* {Digital,Tru64} UNIX define this, alas */ 83 #endif 84 85 /* flags */ 86 #define PF_USER 0x01 /* hint that packet has interactive data */ 87 #define PF_VIS 0x02 /* only visible ops wanted */ 88 #endif 89 90 struct PageID { 91 nd_uint32_t p_sid; /* session id of initiator */ 92 nd_uint32_t p_uid; /* page number */ 93 }; 94 95 struct dophdr { 96 nd_uint32_t dh_ts; /* sender's timestamp */ 97 nd_uint16_t dh_len; /* body length */ 98 nd_uint8_t dh_flags; 99 nd_uint8_t dh_type; /* body type */ 100 /* body follows */ 101 }; 102 /* 103 * Drawing op sub-types. 104 */ 105 #define DT_RECT 2 106 #define DT_LINE 3 107 #define DT_ML 4 108 #define DT_DEL 5 109 #define DT_XFORM 6 110 #define DT_ELL 7 111 #define DT_CHAR 8 112 #define DT_STR 9 113 #define DT_NOP 10 114 #define DT_PSCODE 11 115 #define DT_PSCOMP 12 116 #define DT_REF 13 117 #define DT_SKIP 14 118 #define DT_HOLE 15 119 static const struct tok dop_str[] = { 120 { DT_RECT, "RECT" }, 121 { DT_LINE, "LINE" }, 122 { DT_ML, "ML" }, 123 { DT_DEL, "DEL" }, 124 { DT_XFORM, "XFORM" }, 125 { DT_ELL, "ELL" }, 126 { DT_CHAR, "CHAR" }, 127 { DT_STR, "STR" }, 128 { DT_NOP, "NOP" }, 129 { DT_PSCODE, "PSCODE" }, 130 { DT_PSCOMP, "PSCOMP" }, 131 { DT_REF, "REF" }, 132 { DT_SKIP, "SKIP" }, 133 { DT_HOLE, "HOLE" }, 134 { 0, NULL } 135 }; 136 137 /* 138 * A drawing operation. 139 */ 140 struct pkt_dop { 141 struct PageID pd_page; /* page that operations apply to */ 142 nd_uint32_t pd_sseq; /* start sequence number */ 143 nd_uint32_t pd_eseq; /* end sequence number */ 144 /* drawing ops follow */ 145 }; 146 147 /* 148 * A repair request. 149 */ 150 struct pkt_rreq { 151 nd_uint32_t pr_id; /* source id of drawops to be repaired */ 152 struct PageID pr_page; /* page of drawops */ 153 nd_uint32_t pr_sseq; /* start seqno */ 154 nd_uint32_t pr_eseq; /* end seqno */ 155 }; 156 157 /* 158 * A repair reply. 159 */ 160 struct pkt_rrep { 161 nd_uint32_t pr_id; /* original site id of ops */ 162 struct pkt_dop pr_dop; 163 /* drawing ops follow */ 164 }; 165 166 struct id_off { 167 nd_uint32_t id; 168 nd_uint32_t off; 169 }; 170 171 struct pgstate { 172 nd_uint32_t slot; 173 struct PageID page; 174 nd_uint16_t nid; 175 nd_uint16_t rsvd; 176 /* seqptr's */ 177 }; 178 179 /* 180 * An announcement packet. 181 */ 182 struct pkt_id { 183 nd_uint32_t pi_mslot; 184 struct PageID pi_mpage; /* current page */ 185 struct pgstate pi_ps; 186 /* seqptr's */ 187 /* null-terminated site name */ 188 }; 189 190 struct pkt_preq { 191 struct PageID pp_page; 192 nd_uint32_t pp_low; 193 nd_uint32_t pp_high; 194 }; 195 196 struct pkt_prep { 197 nd_uint32_t pp_n; /* size of pageid array */ 198 /* pgstate's follow */ 199 }; 200 201 static int 202 wb_id(netdissect_options *ndo, 203 const struct pkt_id *id, u_int len) 204 { 205 u_int i; 206 const u_char *sitename; 207 const struct id_off *io; 208 char c; 209 u_int nid; 210 211 ND_PRINT(" wb-id:"); 212 if (len < sizeof(*id)) 213 return (-1); 214 len -= sizeof(*id); 215 216 ND_PRINT(" %u/%s:%u (max %u/%s:%u) ", 217 GET_BE_U_4(id->pi_ps.slot), 218 GET_IPADDR_STRING(id->pi_ps.page.p_sid), 219 GET_BE_U_4(id->pi_ps.page.p_uid), 220 GET_BE_U_4(id->pi_mslot), 221 GET_IPADDR_STRING(id->pi_mpage.p_sid), 222 GET_BE_U_4(id->pi_mpage.p_uid)); 223 /* now the rest of the fixed-size part of struct pkt_id */ 224 ND_TCHECK_SIZE(id); 225 226 nid = GET_BE_U_2(id->pi_ps.nid); 227 if (len < sizeof(*io) * nid) 228 return (-1); 229 len -= sizeof(*io) * nid; 230 io = (const struct id_off *)(id + 1); 231 sitename = (const u_char *)(io + nid); 232 233 c = '<'; 234 for (i = 0; i < nid; ++io, ++i) { 235 ND_PRINT("%c%s:%u", 236 c, GET_IPADDR_STRING(io->id), GET_BE_U_4(io->off)); 237 c = ','; 238 } 239 ND_PRINT("> \""); 240 nd_printjnp(ndo, sitename, len); 241 ND_PRINT("\""); 242 return (0); 243 } 244 245 static int 246 wb_rreq(netdissect_options *ndo, 247 const struct pkt_rreq *rreq, u_int len) 248 { 249 ND_PRINT(" wb-rreq:"); 250 if (len < sizeof(*rreq)) 251 return (-1); 252 253 ND_PRINT(" please repair %s %s:%u<%u:%u>", 254 GET_IPADDR_STRING(rreq->pr_id), 255 GET_IPADDR_STRING(rreq->pr_page.p_sid), 256 GET_BE_U_4(rreq->pr_page.p_uid), 257 GET_BE_U_4(rreq->pr_sseq), 258 GET_BE_U_4(rreq->pr_eseq)); 259 return (0); 260 } 261 262 static int 263 wb_preq(netdissect_options *ndo, 264 const struct pkt_preq *preq, u_int len) 265 { 266 ND_PRINT(" wb-preq:"); 267 if (len < sizeof(*preq)) 268 return (-1); 269 270 ND_PRINT(" need %u/%s:%u", 271 GET_BE_U_4(preq->pp_low), 272 GET_IPADDR_STRING(preq->pp_page.p_sid), 273 GET_BE_U_4(preq->pp_page.p_uid)); 274 /* now the rest of the fixed-size part of struct pkt_req */ 275 ND_TCHECK_SIZE(preq); 276 return (0); 277 } 278 279 static int 280 wb_prep(netdissect_options *ndo, 281 const struct pkt_prep *prep, u_int len) 282 { 283 u_int n; 284 const struct pgstate *ps; 285 286 ND_PRINT(" wb-prep:"); 287 if (len < sizeof(*prep)) 288 return (-1); 289 n = GET_BE_U_4(prep->pp_n); 290 ps = (const struct pgstate *)(prep + 1); 291 while (n != 0) { 292 const struct id_off *io, *ie; 293 char c = '<'; 294 295 ND_PRINT(" %u/%s:%u", 296 GET_BE_U_4(ps->slot), 297 GET_IPADDR_STRING(ps->page.p_sid), 298 GET_BE_U_4(ps->page.p_uid)); 299 /* now the rest of the fixed-size part of struct pgstate */ 300 ND_TCHECK_SIZE(ps); 301 io = (const struct id_off *)(ps + 1); 302 for (ie = io + GET_U_1(ps->nid); io < ie; ++io) { 303 ND_PRINT("%c%s:%u", c, GET_IPADDR_STRING(io->id), 304 GET_BE_U_4(io->off)); 305 c = ','; 306 } 307 ND_PRINT(">"); 308 ps = (const struct pgstate *)io; 309 n--; 310 } 311 return 0; 312 } 313 314 static void 315 wb_dops(netdissect_options *ndo, const struct pkt_dop *dop, 316 uint32_t ss, uint32_t es) 317 { 318 const struct dophdr *dh = (const struct dophdr *)((const u_char *)dop + sizeof(*dop)); 319 320 ND_PRINT(" <"); 321 for ( ; ss <= es; ++ss) { 322 u_int t; 323 324 t = GET_U_1(dh->dh_type); 325 326 ND_PRINT(" %s", tok2str(dop_str, "dop-%u!", t)); 327 if (t == DT_SKIP || t == DT_HOLE) { 328 uint32_t ts = GET_BE_U_4(dh->dh_ts); 329 ND_PRINT("%u", ts - ss + 1); 330 if (ss > ts || ts > es) { 331 ND_PRINT("[|]"); 332 if (ts < ss) 333 return; 334 } 335 ss = ts; 336 } 337 dh = DOP_NEXT(dh); 338 } 339 ND_PRINT(" >"); 340 } 341 342 static int 343 wb_rrep(netdissect_options *ndo, 344 const struct pkt_rrep *rrep, u_int len) 345 { 346 const struct pkt_dop *dop = &rrep->pr_dop; 347 348 ND_PRINT(" wb-rrep:"); 349 if (len < sizeof(*rrep)) 350 return (-1); 351 len -= sizeof(*rrep); 352 353 ND_PRINT(" for %s %s:%u<%u:%u>", 354 GET_IPADDR_STRING(rrep->pr_id), 355 GET_IPADDR_STRING(dop->pd_page.p_sid), 356 GET_BE_U_4(dop->pd_page.p_uid), 357 GET_BE_U_4(dop->pd_sseq), 358 GET_BE_U_4(dop->pd_eseq)); 359 360 if (ndo->ndo_vflag) 361 wb_dops(ndo, dop, 362 GET_BE_U_4(dop->pd_sseq), 363 GET_BE_U_4(dop->pd_eseq)); 364 return (0); 365 } 366 367 static int 368 wb_drawop(netdissect_options *ndo, 369 const struct pkt_dop *dop, u_int len) 370 { 371 ND_PRINT(" wb-dop:"); 372 if (len < sizeof(*dop)) 373 return (-1); 374 len -= sizeof(*dop); 375 376 ND_PRINT(" %s:%u<%u:%u>", 377 GET_IPADDR_STRING(dop->pd_page.p_sid), 378 GET_BE_U_4(dop->pd_page.p_uid), 379 GET_BE_U_4(dop->pd_sseq), 380 GET_BE_U_4(dop->pd_eseq)); 381 382 if (ndo->ndo_vflag) 383 wb_dops(ndo, dop, 384 GET_BE_U_4(dop->pd_sseq), 385 GET_BE_U_4(dop->pd_eseq)); 386 return (0); 387 } 388 389 /* 390 * Print whiteboard multicast packets. 391 */ 392 UNALIGNED_OK 393 void 394 wb_print(netdissect_options *ndo, 395 const u_char *hdr, u_int len) 396 { 397 const struct pkt_hdr *ph; 398 uint8_t type; 399 int print_result; 400 401 ndo->ndo_protocol = "wb"; 402 ph = (const struct pkt_hdr *)hdr; 403 if (len < sizeof(*ph)) 404 goto invalid; 405 ND_TCHECK_SIZE(ph); 406 len -= sizeof(*ph); 407 408 if (GET_U_1(ph->ph_flags)) 409 ND_PRINT("*"); 410 type = GET_U_1(ph->ph_type); 411 switch (type) { 412 413 case PT_KILL: 414 ND_PRINT(" wb-kill"); 415 return; 416 417 case PT_ID: 418 print_result = wb_id(ndo, (const struct pkt_id *)(ph + 1), len); 419 break; 420 421 case PT_RREQ: 422 print_result = wb_rreq(ndo, (const struct pkt_rreq *)(ph + 1), len); 423 break; 424 425 case PT_RREP: 426 print_result = wb_rrep(ndo, (const struct pkt_rrep *)(ph + 1), len); 427 break; 428 429 case PT_DRAWOP: 430 print_result = wb_drawop(ndo, (const struct pkt_dop *)(ph + 1), len); 431 break; 432 433 case PT_PREQ: 434 print_result = wb_preq(ndo, (const struct pkt_preq *)(ph + 1), len); 435 break; 436 437 case PT_PREP: 438 print_result = wb_prep(ndo, (const struct pkt_prep *)(ph + 1), len); 439 break; 440 441 default: 442 ND_PRINT(" wb-%u!", type); 443 print_result = -1; 444 } 445 if (print_result < 0) 446 goto invalid; 447 return; 448 449 invalid: 450 nd_print_invalid(ndo); 451 } 452
Indexes created Mon Aug 17 00:26:26 UTC 2026