contrib/tcpdump-3.8.3/print-wb.c

   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 1.30.2.3 2004/03/24 04:06:52 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 }