sbin/routed/trace.c

   1 /*
   2  * Copyright (c) 1983, 1988, 1993
   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 the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)trace.c  8.1 (Berkeley) 6/5/93
  30  * $FreeBSD: src/sbin/routed/trace.c,v 1.5.2.1 2002/11/07 17:19:13 imp Exp $
  31  */
  32
  33 #define RIPCMDS
  34 #include "defs.h"
  35 #include "pathnames.h"
  36 #include <sys/stat.h>
  37 #include <sys/signal.h>
  38 #include <fcntl.h>
  39
  40 #define NRECORDS        50              /* size of circular trace buffer */
  41
  42 int     tracelevel, new_tracelevel;
  43 FILE    *ftrace;                /* output trace file */
  44 static const char *sigtrace_pat = "%s";
  45 static char savetracename[MAXPATHLEN+1];
  46 char    inittracename[MAXPATHLEN+1];
  47 int     file_trace;                     /* 1=tracing to file, not stdout */
  48
  49 static void trace_dump(void);
  50 static void tmsg(const char *, ...) __printflike(1, 2);
  51
  52
  53 /* convert string to printable characters
  54  */
  55 static char *
  56 qstring(u_char *s, int len)
  57 {
  58         static char buf[8*20+1];
  59         char *p;
  60         u_char *s2, c;
  61
  62
  63         for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
  64                 c = *s++;
  65                 if (c == '\0') {
  66                         for (s2 = s+1; s2 < &s[len]; s2++) {
  67                                 if (*s2 != '\0')
  68                                         break;
  69                         }
  70                         if (s2 >= &s[len])
  71                             goto exit;
  72                 }
  73
  74                 if (c >= ' ' && c < 0x7f && c != '\\') {
  75                         *p++ = c;
  76                         continue;
  77                 }
  78                 *p++ = '\\';
  79                 switch (c) {
  80                 case '\\':
  81                         *p++ = '\\';
  82                         break;
  83                 case '\n':
  84                         *p++= 'n';
  85                         break;
  86                 case '\r':
  87                         *p++= 'r';
  88                         break;
  89                 case '\t':
  90                         *p++ = 't';
  91                         break;
  92                 case '\b':
  93                         *p++ = 'b';
  94                         break;
  95                 default:
  96                         p += sprintf(p,"%o",c);
  97                         break;
  98                 }
  99         }
 100 exit:
 101         *p = '\0';
 102         return buf;
 103 }
 104
 105
 106 /* convert IP address to a string, but not into a single buffer
 107  */
 108 char *
 109 naddr_ntoa(naddr a)
 110 {
 111 #define NUM_BUFS 4
 112         static int bufno;
 113         static struct {
 114             char    str[16];            /* xxx.xxx.xxx.xxx\0 */
 115         } bufs[NUM_BUFS];
 116         char *s;
 117         struct in_addr addr;
 118
 119         addr.s_addr = a;
 120         s = strcpy(bufs[bufno].str, inet_ntoa(addr));
 121         bufno = (bufno+1) % NUM_BUFS;
 122         return s;
 123 #undef NUM_BUFS
 124 }
 125
 126
 127 const char *
 128 saddr_ntoa(struct sockaddr *sa)
 129 {
 130         return (sa == NULL) ? "?" : naddr_ntoa(S_ADDR(sa));
 131 }
 132
 133
 134 static char *
 135 ts(time_t secs) {
 136         static char s[20];
 137
 138         secs += epoch.tv_sec;
 139         memcpy(s, ctime(&secs)+11, 8);
 140         s[8] = '\0';
 141         return s;
 142 }
 143
 144
 145 /* On each event, display a time stamp.
 146  * This assumes that 'now' is update once for each event, and
 147  * that at least now.tv_usec changes.
 148  */
 149 static struct timeval lastlog_time;
 150
 151 void
 152 lastlog(void)
 153 {
 154         if (lastlog_time.tv_sec != now.tv_sec
 155             || lastlog_time.tv_usec != now.tv_usec) {
 156                 fprintf(ftrace, "-- %s --\n", ts(now.tv_sec));
 157                 lastlog_time = now;
 158         }
 159 }
 160
 161
 162 static void
 163 tmsg(const char *p, ...)
 164 {
 165         va_list args;
 166
 167         if (ftrace != NULL) {
 168                 lastlog();
 169                 va_start(args, p);
 170                 vfprintf(ftrace, p, args);
 171                 fputc('\n',ftrace);
 172                 fflush(ftrace);
 173         }
 174 }
 175
 176
 177 void
 178 trace_close(int zap_stdio)
 179 {
 180         int fd;
 181
 182
 183         fflush(stdout);
 184         fflush(stderr);
 185
 186         if (ftrace != NULL && zap_stdio) {
 187                 if (ftrace != stdout)
 188                         fclose(ftrace);
 189                 ftrace = NULL;
 190                 fd = open(_PATH_DEVNULL, O_RDWR);
 191                 if (isatty(STDIN_FILENO))
 192                         dup2(fd, STDIN_FILENO);
 193                 if (isatty(STDOUT_FILENO))
 194                         dup2(fd, STDOUT_FILENO);
 195                 if (isatty(STDERR_FILENO))
 196                         dup2(fd, STDERR_FILENO);
 197                 close(fd);
 198         }
 199         lastlog_time.tv_sec = 0;
 200 }
 201
 202
 203 void
 204 trace_flush(void)
 205 {
 206         if (ftrace != NULL) {
 207                 fflush(ftrace);
 208                 if (ferror(ftrace))
 209                         trace_off("tracing off: %s", strerror(ferror(ftrace)));
 210         }
 211 }
 212
 213
 214 void
 215 trace_off(const char *p, ...)
 216 {
 217         va_list args;
 218
 219
 220         if (ftrace != NULL) {
 221                 lastlog();
 222                 va_start(args, p);
 223                 vfprintf(ftrace, p, args);
 224                 fputc('\n',ftrace);
 225         }
 226         trace_close(file_trace);
 227
 228         new_tracelevel = tracelevel = 0;
 229 }
 230
 231
 232 /* log a change in tracing
 233  */
 234 void
 235 tracelevel_msg(const char *pat,
 236                int dump)                /* -1=no dump, 0=default, 1=force */
 237 {
 238         static const char *off_msgs[MAX_TRACELEVEL] = {
 239                 "Tracing actions stopped",
 240                 "Tracing packets stopped",
 241                 "Tracing packet contents stopped",
 242                 "Tracing kernel changes stopped",
 243         };
 244         static const char *on_msgs[MAX_TRACELEVEL] = {
 245                 "Tracing actions started",
 246                 "Tracing packets started",
 247                 "Tracing packet contents started",
 248                 "Tracing kernel changes started",
 249         };
 250         u_int old_tracelevel = tracelevel;
 251
 252
 253         if (new_tracelevel < 0)
 254                 new_tracelevel = 0;
 255         else if (new_tracelevel > MAX_TRACELEVEL)
 256                 new_tracelevel = MAX_TRACELEVEL;
 257
 258         if (new_tracelevel < tracelevel) {
 259                 if (new_tracelevel <= 0) {
 260                         trace_off(pat, off_msgs[0]);
 261                 } else do {
 262                         tmsg(pat, off_msgs[tracelevel]);
 263                 }
 264                 while (--tracelevel != new_tracelevel);
 265
 266         } else if (new_tracelevel > tracelevel) {
 267                 do {
 268                         tmsg(pat, on_msgs[tracelevel++]);
 269                 } while (tracelevel != new_tracelevel);
 270         }
 271
 272         if (dump > 0
 273             || (dump == 0 && old_tracelevel == 0 && tracelevel != 0))
 274                 trace_dump();
 275 }
 276
 277
 278 void
 279 set_tracefile(const char *filename,
 280               const char *pat,
 281               int dump)                 /* -1=no dump, 0=default, 1=force */
 282 {
 283         struct stat stbuf;
 284         FILE *n_ftrace;
 285         const char *fn;
 286
 287
 288         /* Allow a null filename to increase the level if the trace file
 289          * is already open or if coming from a trusted source, such as
 290          * a signal or the command line.
 291          */
 292         if (filename == NULL || filename[0] == '\0') {
 293                 filename = NULL;
 294                 if (ftrace == NULL) {
 295                         if (inittracename[0] == '\0') {
 296                                 msglog("missing trace file name");
 297                                 return;
 298                         }
 299                         fn = inittracename;
 300                 } else {
 301                         fn = NULL;
 302                 }
 303
 304         } else if (!strcmp(filename,"dump/../table")) {
 305                 trace_dump();
 306                 return;
 307
 308         } else {
 309                 /* Allow the file specified with "-T file" to be reopened,
 310                  * but require all other names specified over the net to
 311                  * match the official path.  The path can specify a directory
 312                  * in which the file is to be created.
 313                  */
 314                 if (strcmp(filename, inittracename)
 315 #ifdef _PATH_TRACE
 316                     && (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
 317                         || strstr(filename,"../")
 318                         || 0 > stat(_PATH_TRACE, &stbuf))
 319 #endif
 320                     ) {
 321                         msglog("wrong trace file \"%s\"", filename);
 322                         return;
 323                 }
 324
 325                 /* If the new tracefile exists, it must be a regular file.
 326                  */
 327                 if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
 328                         msglog("wrong type (%#x) of trace file \"%s\"",
 329                                stbuf.st_mode, filename);
 330                         return;
 331                 }
 332
 333                 fn = filename;
 334         }
 335
 336         if (fn != NULL) {
 337                 n_ftrace = fopen(fn, "a");
 338                 if (n_ftrace == NULL) {
 339                         msglog("failed to open trace file \"%s\" %s",
 340                                fn, strerror(errno));
 341                         if (fn == inittracename)
 342                                 inittracename[0] = '\0';
 343                         return;
 344                 }
 345
 346                 tmsg("switch to trace file %s", fn);
 347
 348                 trace_close(file_trace = 1);
 349
 350                 if (fn != savetracename)
 351                         strncpy(savetracename, fn, sizeof(savetracename)-1);
 352                 ftrace = n_ftrace;
 353
 354                 fflush(stdout);
 355                 fflush(stderr);
 356                 dup2(fileno(ftrace), STDOUT_FILENO);
 357                 dup2(fileno(ftrace), STDERR_FILENO);
 358         }
 359
 360         if (new_tracelevel == 0 || filename == NULL)
 361                 new_tracelevel++;
 362         tracelevel_msg(pat, dump != 0 ? dump : (filename != NULL));
 363 }
 364
 365
 366 /* ARGSUSED */
 367 void
 368 sigtrace_on(__unused int s)
 369 {
 370         new_tracelevel++;
 371         sigtrace_pat = "SIGUSR1: %s";
 372 }
 373
 374
 375 /* ARGSUSED */
 376 void
 377 sigtrace_off(__unused int s)
 378 {
 379         new_tracelevel--;
 380         sigtrace_pat = "SIGUSR2: %s";
 381 }
 382
 383
 384 /* Set tracing after a signal.
 385  */
 386 void
 387 set_tracelevel(void)
 388 {
 389         if (new_tracelevel == tracelevel)
 390                 return;
 391
 392         /* If tracing entirely off, and there was no tracefile specified
 393          * on the command line, then leave it off.
 394          */
 395         if (new_tracelevel > tracelevel && ftrace == NULL) {
 396                 if (savetracename[0] != '\0') {
 397                         set_tracefile(savetracename,sigtrace_pat,0);
 398                 } else if (inittracename[0] != '\0') {
 399                                 set_tracefile(inittracename,sigtrace_pat,0);
 400                 } else {
 401                         new_tracelevel = 0;
 402                         return;
 403                 }
 404         } else {
 405                 tracelevel_msg(sigtrace_pat, 0);
 406         }
 407 }
 408
 409
 410 /* display an address
 411  */
 412 char *
 413 addrname(naddr  addr,                   /* in network byte order */
 414          naddr  mask,
 415          int    force)                  /* 0=show mask if nonstandard, */
 416 {                                       /*      1=always show mask, 2=never */
 417 #define NUM_BUFS 4
 418         static int bufno;
 419         static struct {
 420             char    str[15+20];
 421         } bufs[NUM_BUFS];
 422         char *s, *sp;
 423         naddr dmask;
 424         int i;
 425
 426         s = strcpy(bufs[bufno].str, naddr_ntoa(addr));
 427         bufno = (bufno+1) % NUM_BUFS;
 428
 429         if (force == 1 || (force == 0 && mask != std_mask(addr))) {
 430                 sp = &s[strlen(s)];
 431
 432                 dmask = mask & -mask;
 433                 if (mask + dmask == 0) {
 434                         for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
 435                                 continue;
 436                         sprintf(sp, "/%d", 32-i);
 437
 438                 } else {
 439                         sprintf(sp, " (mask %#x)", (u_int)mask);
 440                 }
 441         }
 442
 443         return s;
 444 #undef NUM_BUFS
 445 }
 446
 447
 448 /* display a bit-field
 449  */
 450 struct bits {
 451         u_int   bits_mask;
 452         u_int   bits_clear;
 453         const char *bits_name;
 454 };
 455
 456 static struct bits if_bits[] = {
 457         { IFF_LOOPBACK,         0,              "LOOPBACK" },
 458         { IFF_POINTOPOINT,      0,              "PT-TO-PT" },
 459         { 0,                    0,              0}
 460 };
 461
 462 static struct bits is_bits[] = {
 463         { IS_ALIAS,             0,              "ALIAS" },
 464         { IS_SUBNET,            0,              "" },
 465         { IS_REMOTE,            (IS_NO_RDISC
 466                                  | IS_BCAST_RDISC), "REMOTE" },
 467         { IS_PASSIVE,           (IS_NO_RDISC
 468                                  | IS_NO_RIP
 469                                  | IS_NO_SUPER_AG
 470                                  | IS_PM_RDISC
 471                                  | IS_NO_AG),   "PASSIVE" },
 472         { IS_EXTERNAL,          0,              "EXTERNAL" },
 473         { IS_CHECKED,           0,              "" },
 474         { IS_ALL_HOSTS,         0,              "" },
 475         { IS_ALL_ROUTERS,       0,              "" },
 476         { IS_DISTRUST,          0,              "DISTRUST" },
 477         { IS_BROKE,             IS_SICK,        "BROKEN" },
 478         { IS_SICK,              0,              "SICK" },
 479         { IS_DUP,               0,              "DUPLICATE" },
 480         { IS_REDIRECT_OK,       0,              "REDIRECT_OK" },
 481         { IS_NEED_NET_SYN,      0,              "" },
 482         { IS_NO_AG,             IS_NO_SUPER_AG, "NO_AG" },
 483         { IS_NO_SUPER_AG,       0,              "NO_SUPER_AG" },
 484         { (IS_NO_RIPV1_IN
 485            | IS_NO_RIPV2_IN
 486            | IS_NO_RIPV1_OUT
 487            | IS_NO_RIPV2_OUT),  0,              "NO_RIP" },
 488         { (IS_NO_RIPV1_IN
 489            | IS_NO_RIPV1_OUT),  0,              "RIPV2" },
 490         { IS_NO_RIPV1_IN,       0,              "NO_RIPV1_IN" },
 491         { IS_NO_RIPV2_IN,       0,              "NO_RIPV2_IN" },
 492         { IS_NO_RIPV1_OUT,      0,              "NO_RIPV1_OUT" },
 493         { IS_NO_RIPV2_OUT,      0,              "NO_RIPV2_OUT" },
 494         { (IS_NO_ADV_IN
 495            | IS_NO_SOL_OUT
 496            | IS_NO_ADV_OUT),    IS_BCAST_RDISC, "NO_RDISC" },
 497         { IS_NO_SOL_OUT,        0,              "NO_SOLICIT" },
 498         { IS_SOL_OUT,           0,              "SEND_SOLICIT" },
 499         { IS_NO_ADV_OUT,        IS_BCAST_RDISC, "NO_RDISC_ADV" },
 500         { IS_ADV_OUT,           0,              "RDISC_ADV" },
 501         { IS_BCAST_RDISC,       0,              "BCAST_RDISC" },
 502         { IS_PM_RDISC,          0,              "" },
 503         { 0,                    0,              "%#x"}
 504 };
 505
 506 static struct bits rs_bits[] = {
 507         { RS_IF,                0,              "IF" },
 508         { RS_NET_INT,           RS_NET_SYN,     "NET_INT" },
 509         { RS_NET_SYN,           0,              "NET_SYN" },
 510         { RS_SUBNET,            0,              "" },
 511         { RS_LOCAL,             0,              "LOCAL" },
 512         { RS_MHOME,             0,              "MHOME" },
 513         { RS_STATIC,            0,              "STATIC" },
 514         { RS_RDISC,             0,              "RDISC" },
 515         { 0,                    0,              "%#x"}
 516 };
 517
 518
 519 static void
 520 trace_bits(const struct bits *tbl,
 521            u_int field,
 522            int force)
 523 {
 524         u_int b;
 525         char c;
 526
 527         if (force) {
 528                 putc('<', ftrace);
 529                 c = 0;
 530         } else {
 531                 c = '<';
 532         }
 533
 534         while (field != 0
 535                && (b = tbl->bits_mask) != 0) {
 536                 if ((b & field) == b) {
 537                         if (tbl->bits_name[0] != '\0') {
 538                                 if (c)
 539                                         putc(c, ftrace);
 540                                 fprintf(ftrace, "%s", tbl->bits_name);
 541                                 c = '|';
 542                         }
 543                         if (0 == (field &= ~(b | tbl->bits_clear)))
 544                                 break;
 545                 }
 546                 tbl++;
 547         }
 548         if (field != 0 && tbl->bits_name != NULL) {
 549                 if (c)
 550                         putc(c, ftrace);
 551                 fprintf(ftrace, tbl->bits_name, field);
 552                 c = '|';
 553         }
 554
 555         if (c != '<' || force)
 556                 fputs("> ", ftrace);
 557 }
 558
 559
 560 char *
 561 rtname(naddr dst,
 562        naddr mask,
 563        naddr gate)
 564 {
 565         static char buf[3*4+3+1+2+3     /* "xxx.xxx.xxx.xxx/xx-->" */
 566                         +3*4+3+1];      /* "xxx.xxx.xxx.xxx" */
 567         int i;
 568
 569         i = sprintf(buf, "%-16s-->", addrname(dst, mask, 0));
 570         sprintf(&buf[i], "%-*s", 15+20-MAX(20,i), naddr_ntoa(gate));
 571         return buf;
 572 }
 573
 574
 575 static void
 576 print_rts(struct rt_spare *rts,
 577           int force_metric,             /* -1=suppress, 0=default */
 578           int force_ifp,                /* -1=suppress, 0=default */
 579           int force_router,             /* -1=suppress, 0=default, 1=display */
 580           int force_tag,                /* -1=suppress, 0=default, 1=display */
 581           int force_time)               /* 0=suppress, 1=display */
 582 {
 583         int i;
 584
 585
 586         if (force_metric >= 0)
 587                 fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
 588         if (force_ifp >= 0)
 589                 fprintf(ftrace, "%s ", (rts->rts_ifp == 0 ?
 590                                         "if?" : rts->rts_ifp->int_name));
 591         if (force_router > 0
 592             || (force_router == 0 && rts->rts_router != rts->rts_gate))
 593                 fprintf(ftrace, "router=%s ", naddr_ntoa(rts->rts_router));
 594         if (force_time > 0)
 595                 fprintf(ftrace, "%s ", ts(rts->rts_time));
 596         if (force_tag > 0
 597             || (force_tag == 0 && rts->rts_tag != 0))
 598                 fprintf(ftrace, "tag=%#x ", ntohs(rts->rts_tag));
 599         if (rts->rts_de_ag != 0) {
 600                 for (i = 1; (u_int)(1 << i) <= rts->rts_de_ag; i++)
 601                         continue;
 602                 fprintf(ftrace, "de_ag=%d ", i);
 603         }
 604
 605 }
 606
 607
 608 void
 609 trace_if(const char *act,
 610          struct interface *ifp)
 611 {
 612         if (!TRACEACTIONS || ftrace == NULL)
 613                 return;
 614
 615         lastlog();
 616         fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
 617         fprintf(ftrace, "%-15s-->%-15s ",
 618                 naddr_ntoa(ifp->int_addr),
 619                 addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
 620                           ? ifp->int_dstaddr : htonl(ifp->int_net)),
 621                          ifp->int_mask, 1));
 622         if (ifp->int_metric != 0)
 623                 fprintf(ftrace, "metric=%d ", ifp->int_metric);
 624         if (!IS_RIP_OUT_OFF(ifp->int_state)
 625             && ifp->int_d_metric != 0)
 626                 fprintf(ftrace, "fake_default=%d ", ifp->int_d_metric);
 627         trace_bits(if_bits, ifp->int_if_flags, 0);
 628         trace_bits(is_bits, ifp->int_state, 0);
 629         fputc('\n',ftrace);
 630 }
 631
 632
 633 void
 634 trace_upslot(struct rt_entry *rt,
 635              struct rt_spare *rts,
 636              struct rt_spare *new)
 637 {
 638         if (!TRACEACTIONS || ftrace == NULL)
 639                 return;
 640
 641         if (rts->rts_gate == new->rts_gate
 642             && rts->rts_router == new->rts_router
 643             && rts->rts_metric == new->rts_metric
 644             && rts->rts_tag == new->rts_tag
 645             && rts->rts_de_ag == new->rts_de_ag)
 646                 return;
 647
 648         lastlog();
 649         if (new->rts_gate == 0) {
 650                 fprintf(ftrace, "Del #%d %-35s ",
 651                         (int)(rts - rt->rt_spares),
 652                         rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 653                 print_rts(rts, 0,0,0,0,
 654                           (rts != rt->rt_spares
 655                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 656
 657         } else if (rts->rts_gate != RIP_DEFAULT) {
 658                 fprintf(ftrace, "Chg #%d %-35s ",
 659                         (int)(rts - rt->rt_spares),
 660                         rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 661                 print_rts(rts, 0,0,
 662                           rts->rts_gate != new->rts_gate,
 663                           rts->rts_tag != new->rts_tag,
 664                           rts != rt->rt_spares || AGE_RT(rt->rt_state,
 665                                                         rt->rt_ifp));
 666
 667                 fprintf(ftrace, "\n       %19s%-16s ", "",
 668                         (new->rts_gate != rts->rts_gate
 669                         ? naddr_ntoa(new->rts_gate) : ""));
 670                 print_rts(new,
 671                           -(new->rts_metric == rts->rts_metric),
 672                           -(new->rts_ifp == rts->rts_ifp),
 673                           0,
 674                           rts->rts_tag != new->rts_tag,
 675                           (new->rts_time != rts->rts_time
 676                            && (rts != rt->rt_spares
 677                                || AGE_RT(rt->rt_state, new->rts_ifp))));
 678
 679         } else {
 680                 fprintf(ftrace, "Add #%d %-35s ",
 681                         (int)(rts - rt->rt_spares),
 682                         rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
 683                 print_rts(new, 0,0,0,0,
 684                           (rts != rt->rt_spares
 685                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 686         }
 687         fputc('\n',ftrace);
 688 }
 689
 690
 691 /* miscellaneous message checked by the caller
 692  */
 693 void
 694 trace_misc(const char *p, ...)
 695 {
 696         va_list args;
 697
 698         if (ftrace == NULL)
 699                 return;
 700
 701         lastlog();
 702         va_start(args, p);
 703         vfprintf(ftrace, p, args);
 704         fputc('\n',ftrace);
 705 }
 706
 707
 708 /* display a message if tracing actions
 709  */
 710 void
 711 trace_act(const char *p, ...)
 712 {
 713         va_list args;
 714
 715         if (!TRACEACTIONS || ftrace == NULL)
 716                 return;
 717
 718         lastlog();
 719         va_start(args, p);
 720         vfprintf(ftrace, p, args);
 721         fputc('\n',ftrace);
 722 }
 723
 724
 725 /* display a message if tracing packets
 726  */
 727 void
 728 trace_pkt(const char *p, ...)
 729 {
 730         va_list args;
 731
 732         if (!TRACEPACKETS || ftrace == NULL)
 733                 return;
 734
 735         lastlog();
 736         va_start(args, p);
 737         vfprintf(ftrace, p, args);
 738         fputc('\n',ftrace);
 739 }
 740
 741
 742 void
 743 trace_change(struct rt_entry *rt,
 744              u_int      state,
 745              struct     rt_spare *new,
 746              const char *label)
 747 {
 748         if (ftrace == NULL)
 749                 return;
 750
 751         if (rt->rt_metric == new->rts_metric
 752             && rt->rt_gate == new->rts_gate
 753             && rt->rt_router == new->rts_router
 754             && rt->rt_state == state
 755             && rt->rt_tag == new->rts_tag
 756             && rt->rt_de_ag == new->rts_de_ag)
 757                 return;
 758
 759         lastlog();
 760         fprintf(ftrace, "%s %-35s ",
 761                 label, rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 762         print_rts(rt->rt_spares,
 763                   0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
 764         trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
 765
 766         fprintf(ftrace, "\n%*s %19s%-16s ",
 767                 (int)strlen(label), "", "",
 768                 (rt->rt_gate != new->rts_gate
 769                  ? naddr_ntoa(new->rts_gate) : ""));
 770         print_rts(new,
 771                   -(new->rts_metric == rt->rt_metric),
 772                   -(new->rts_ifp == rt->rt_ifp),
 773                   0,
 774                   rt->rt_tag != new->rts_tag,
 775                   (rt->rt_time != new->rts_time
 776                    && AGE_RT(rt->rt_state,new->rts_ifp)));
 777         if (rt->rt_state != state)
 778                 trace_bits(rs_bits, state, 1);
 779         fputc('\n',ftrace);
 780 }
 781
 782
 783 void
 784 trace_add_del(const char * action, struct rt_entry *rt)
 785 {
 786         if (ftrace == NULL)
 787                 return;
 788
 789         lastlog();
 790         fprintf(ftrace, "%s    %-35s ",
 791                 action, rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 792         print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
 793         trace_bits(rs_bits, rt->rt_state, 0);
 794         fputc('\n',ftrace);
 795 }
 796
 797
 798 /* ARGSUSED */
 799 static int
 800 walk_trace(struct radix_node *rn, __unused struct walkarg *w)
 801 {
 802 #define RT ((struct rt_entry *)rn)
 803         struct rt_spare *rts;
 804         int i;
 805
 806         fprintf(ftrace, "  %-35s ",
 807                 rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
 808         print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp));
 809         trace_bits(rs_bits, RT->rt_state, 0);
 810         if (RT->rt_poison_time >= now_garbage
 811             && RT->rt_poison_metric < RT->rt_metric)
 812                 fprintf(ftrace, "pm=%d@%s",
 813                         RT->rt_poison_metric, ts(RT->rt_poison_time));
 814
 815         rts = &RT->rt_spares[1];
 816         for (i = 1; i < NUM_SPARES; i++, rts++) {
 817                 if (rts->rts_gate != RIP_DEFAULT) {
 818                         fprintf(ftrace,"\n    #%d%15s%-16s ",
 819                                 i, "", naddr_ntoa(rts->rts_gate));
 820                         print_rts(rts, 0,0,0,0,1);
 821                 }
 822         }
 823         fputc('\n',ftrace);
 824
 825         return 0;
 826 }
 827
 828
 829 static void
 830 trace_dump(void)
 831 {
 832         struct interface *ifp;
 833
 834         if (ftrace == NULL)
 835                 return;
 836         lastlog();
 837
 838         fputs("current daemon state:\n", ftrace);
 839         for (ifp = ifnet; ifp != NULL; ifp = ifp->int_next)
 840                 trace_if("", ifp);
 841         rn_walktree(rhead, walk_trace, 0);
 842 }
 843
 844
 845 void
 846 trace_rip(const char *dir1, const char *dir2,
 847           struct sockaddr_in *who,
 848           struct interface *ifp,
 849           struct rip *msg,
 850           int size)                     /* total size of message */
 851 {
 852         struct netinfo *n, *lim;
 853 #       define NA ((struct netauth*)n)
 854         int i, seen_route;
 855
 856         if (!TRACEPACKETS || ftrace == NULL)
 857                 return;
 858
 859         lastlog();
 860         if (msg->rip_cmd >= RIPCMD_MAX
 861             || msg->rip_vers == 0) {
 862                 fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
 863                         " %s.%d size=%d\n",
 864                         dir1, msg->rip_vers, msg->rip_cmd, dir2,
 865                         naddr_ntoa(who->sin_addr.s_addr),
 866                         ntohs(who->sin_port),
 867                         size);
 868                 return;
 869         }
 870
 871         fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
 872                 dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
 873                 naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
 874                 ifp ? " via " : "", ifp ? ifp->int_name : "");
 875         if (!TRACECONTENTS)
 876                 return;
 877
 878         seen_route = 0;
 879         switch (msg->rip_cmd) {
 880         case RIPCMD_REQUEST:
 881         case RIPCMD_RESPONSE:
 882                 n = msg->rip_nets;
 883                 lim = (struct netinfo *)((char*)msg + size);
 884                 for (; n < lim; n++) {
 885                         if (!seen_route
 886                             && n->n_family == RIP_AF_UNSPEC
 887                             && ntohl(n->n_metric) == HOPCNT_INFINITY
 888                             && msg->rip_cmd == RIPCMD_REQUEST
 889                             && (n+1 == lim
 890                                 || (n+2 == lim
 891                                     && (n+1)->n_family == RIP_AF_AUTH))) {
 892                                 fputs("\tQUERY ", ftrace);
 893                                 if (n->n_dst != 0)
 894                                         fprintf(ftrace, "%s ",
 895                                                 naddr_ntoa(n->n_dst));
 896                                 if (n->n_mask != 0)
 897                                         fprintf(ftrace, "mask=%#x ",
 898                                                 (u_int)ntohl(n->n_mask));
 899                                 if (n->n_nhop != 0)
 900                                         fprintf(ftrace, "nhop=%s ",
 901                                                 naddr_ntoa(n->n_nhop));
 902                                 if (n->n_tag != 0)
 903                                         fprintf(ftrace, "tag=%#x ",
 904                                                 ntohs(n->n_tag));
 905                                 fputc('\n',ftrace);
 906                                 continue;
 907                         }
 908
 909                         if (n->n_family == RIP_AF_AUTH) {
 910                                 if (NA->a_type == RIP_AUTH_PW
 911                                     && n == msg->rip_nets) {
 912                                         fprintf(ftrace, "\tPassword"
 913                                                 " Authentication:"
 914                                                 " \"%s\"\n",
 915                                                 qstring(NA->au.au_pw,
 916                                                         RIP_AUTH_PW_LEN));
 917                                         continue;
 918                                 }
 919
 920                                 if (NA->a_type == RIP_AUTH_MD5
 921                                     && n == msg->rip_nets) {
 922                                         fprintf(ftrace,
 923                                                 "\tMD5 Auth"
 924                                                 " pkt_len=%d KeyID=%u"
 925                                                 " auth_len=%d"
 926                                                 " seqno=%#x"
 927                                                 " rsvd=%#x,%#x\n",
 928                                             ntohs(NA->au.a_md5.md5_pkt_len),
 929                                             NA->au.a_md5.md5_keyid,
 930                                             NA->au.a_md5.md5_auth_len,
 931                                             (int)ntohl(NA->au.a_md5.md5_seqno),
 932                                             (int)ntohs(NA->au.a_md5.rsvd[0]),
 933                                             (int)ntohs(NA->au.a_md5.rsvd[1]));
 934                                         continue;
 935                                 }
 936                                 fprintf(ftrace,
 937                                         "\tAuthentication type %d: ",
 938                                         ntohs(NA->a_type));
 939                                 for (i = 0;
 940                                      i < (int)sizeof(NA->au.au_pw);
 941                                      i++)
 942                                         fprintf(ftrace, "%02x ",
 943                                                 NA->au.au_pw[i]);
 944                                 fputc('\n',ftrace);
 945                                 continue;
 946                         }
 947
 948                         seen_route = 1;
 949                         if (n->n_family != RIP_AF_INET) {
 950                                 fprintf(ftrace,
 951                                         "\t(af %d) %-18s mask=%#x ",
 952                                         ntohs(n->n_family),
 953                                         naddr_ntoa(n->n_dst),
 954                                         (u_int)ntohl(n->n_mask));
 955                         } else if (msg->rip_vers == RIPv1) {
 956                                 fprintf(ftrace, "\t%-18s ",
 957                                         addrname(n->n_dst, ntohl(n->n_mask),
 958                                                  n->n_mask==0 ? 2 : 1));
 959                         } else {
 960                                 fprintf(ftrace, "\t%-18s ",
 961                                         addrname(n->n_dst, ntohl(n->n_mask),
 962                                                  n->n_mask==0 ? 2 : 0));
 963                         }
 964                         fprintf(ftrace, "metric=%-2d ",
 965                                 (u_int)ntohl(n->n_metric));
 966                         if (n->n_nhop != 0)
 967                                 fprintf(ftrace, " nhop=%s ",
 968                                         naddr_ntoa(n->n_nhop));
 969                         if (n->n_tag != 0)
 970                                 fprintf(ftrace, "tag=%#x", ntohs(n->n_tag));
 971                         fputc('\n',ftrace);
 972                 }
 973                 if (size != (char *)n - (char *)msg)
 974                         fprintf(ftrace, "truncated record, len %d\n", size);
 975                 break;
 976
 977         case RIPCMD_TRACEON:
 978                 fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
 979                         msg->rip_tracefile);
 980                 break;
 981
 982         case RIPCMD_TRACEOFF:
 983                 break;
 984         }
 985 }