sbin/routed/trace.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1983, 1988, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $FreeBSD$
  32  */
  33
  34 #define RIPCMDS
  35 #include "defs.h"
  36 #include "pathnames.h"
  37 #include <sys/stat.h>
  38 #include <sys/signal.h>
  39 #include <fcntl.h>
  40
  41 __RCSID("$FreeBSD$");
  42
  43
  44
  45 int     tracelevel, new_tracelevel;
  46 FILE    *ftrace;                        /* output trace file */
  47 static const char *sigtrace_pat = "%s";
  48 static char savetracename[PATH_MAX];
  49 char    inittracename[PATH_MAX];
  50 static int file_trace;                  /* 1=tracing to file, not stdout */
  51
  52 static void trace_dump(void);
  53 static void tmsg(const char *, ...) PATTRIB(1,2);
  54
  55
  56 /* convert string to printable characters
  57  */
  58 static char *
  59 qstring(u_char *s, int len)
  60 {
  61         static char buf[8*20+1];
  62         char *p;
  63         u_char *s2, c;
  64
  65
  66         for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
  67                 c = *s++;
  68                 if (c == '\0') {
  69                         for (s2 = s+1; s2 < &s[len]; s2++) {
  70                                 if (*s2 != '\0')
  71                                         break;
  72                         }
  73                         if (s2 >= &s[len])
  74                             goto exit;
  75                 }
  76
  77                 if (c >= ' ' && c < 0x7f && c != '\\') {
  78                         *p++ = c;
  79                         continue;
  80                 }
  81                 *p++ = '\\';
  82                 switch (c) {
  83                 case '\\':
  84                         *p++ = '\\';
  85                         break;
  86                 case '\n':
  87                         *p++= 'n';
  88                         break;
  89                 case '\r':
  90                         *p++= 'r';
  91                         break;
  92                 case '\t':
  93                         *p++ = 't';
  94                         break;
  95                 case '\b':
  96                         *p++ = 'b';
  97                         break;
  98                 default:
  99                         p += sprintf(p,"%o",c);
 100                         break;
 101                 }
 102         }
 103 exit:
 104         *p = '\0';
 105         return buf;
 106 }
 107
 108
 109 /* convert IP address to a string, but not into a single buffer
 110  */
 111 char *
 112 naddr_ntoa(naddr a)
 113 {
 114 #define NUM_BUFS 4
 115         static int bufno;
 116         static struct {
 117             char    str[16];            /* xxx.xxx.xxx.xxx\0 */
 118         } bufs[NUM_BUFS];
 119         char *s;
 120         struct in_addr addr;
 121
 122         addr.s_addr = a;
 123         s = strcpy(bufs[bufno].str, inet_ntoa(addr));
 124         bufno = (bufno+1) % NUM_BUFS;
 125         return s;
 126 #undef NUM_BUFS
 127 }
 128
 129
 130 const char *
 131 saddr_ntoa(struct sockaddr *sa)
 132 {
 133         return (sa == NULL) ? "?" : naddr_ntoa(S_ADDR(sa));
 134 }
 135
 136
 137 static char *
 138 ts(time_t secs) {
 139         static char s[20];
 140
 141         secs += epoch.tv_sec;
 142         memcpy(s, ctime(&secs)+11, 8);
 143         s[8] = '\0';
 144         return s;
 145 }
 146
 147
 148 /* On each event, display a time stamp.
 149  * This assumes that 'now' is update once for each event, and
 150  * that at least now.tv_usec changes.
 151  */
 152 static struct timeval lastlog_time;
 153
 154 void
 155 lastlog(void)
 156 {
 157         if (lastlog_time.tv_sec != now.tv_sec
 158             || lastlog_time.tv_usec != now.tv_usec) {
 159                 (void)fprintf(ftrace, "-- %s --\n", ts(now.tv_sec));
 160                 lastlog_time = now;
 161         }
 162 }
 163
 164
 165 static void
 166 tmsg(const char *p, ...)
 167 {
 168         va_list args;
 169
 170         if (ftrace != NULL) {
 171                 lastlog();
 172                 va_start(args, p);
 173                 vfprintf(ftrace, p, args);
 174                 va_end(args);
 175                 (void)fputc('\n',ftrace);
 176                 fflush(ftrace);
 177         }
 178 }
 179
 180
 181 void
 182 trace_close(int zap_stdio)
 183 {
 184         int fd;
 185
 186
 187         fflush(stdout);
 188         fflush(stderr);
 189
 190         if (ftrace != NULL && zap_stdio) {
 191                 if (ftrace != stdout)
 192                         fclose(ftrace);
 193                 ftrace = NULL;
 194                 fd = open(_PATH_DEVNULL, O_RDWR);
 195                 if (fd < 0)
 196                         return;
 197                 if (isatty(STDIN_FILENO))
 198                         (void)dup2(fd, STDIN_FILENO);
 199                 if (isatty(STDOUT_FILENO))
 200                         (void)dup2(fd, STDOUT_FILENO);
 201                 if (isatty(STDERR_FILENO))
 202                         (void)dup2(fd, STDERR_FILENO);
 203                 (void)close(fd);
 204         }
 205         lastlog_time.tv_sec = 0;
 206 }
 207
 208
 209 void
 210 trace_flush(void)
 211 {
 212         if (ftrace != NULL) {
 213                 fflush(ftrace);
 214                 if (ferror(ftrace))
 215                         trace_off("tracing off: %s", strerror(ferror(ftrace)));
 216         }
 217 }
 218
 219
 220 void
 221 trace_off(const char *p, ...)
 222 {
 223         va_list args;
 224
 225
 226         if (ftrace != NULL) {
 227                 lastlog();
 228                 va_start(args, p);
 229                 vfprintf(ftrace, p, args);
 230                 va_end(args);
 231                 (void)fputc('\n',ftrace);
 232         }
 233         trace_close(file_trace);
 234
 235         new_tracelevel = tracelevel = 0;
 236 }
 237
 238
 239 /* log a change in tracing
 240  */
 241 void
 242 tracelevel_msg(const char *pat,
 243                int dump)                /* -1=no dump, 0=default, 1=force */
 244 {
 245         static const char * const off_msgs[MAX_TRACELEVEL] = {
 246                 "Tracing actions stopped",
 247                 "Tracing packets stopped",
 248                 "Tracing packet contents stopped",
 249                 "Tracing kernel changes stopped",
 250         };
 251         static const char * const on_msgs[MAX_TRACELEVEL] = {
 252                 "Tracing actions started",
 253                 "Tracing packets started",
 254                 "Tracing packet contents started",
 255                 "Tracing kernel changes started",
 256         };
 257         u_int old_tracelevel = tracelevel;
 258
 259
 260         if (new_tracelevel < 0)
 261                 new_tracelevel = 0;
 262         else if (new_tracelevel > MAX_TRACELEVEL)
 263                 new_tracelevel = MAX_TRACELEVEL;
 264
 265         if (new_tracelevel < tracelevel) {
 266                 if (new_tracelevel <= 0) {
 267                         trace_off(pat, off_msgs[0]);
 268                 } else do {
 269                         tmsg(pat, off_msgs[tracelevel]);
 270                 }
 271                 while (--tracelevel != new_tracelevel);
 272
 273         } else if (new_tracelevel > tracelevel) {
 274                 do {
 275                         tmsg(pat, on_msgs[tracelevel++]);
 276                 } while (tracelevel != new_tracelevel);
 277         }
 278
 279         if (dump > 0
 280             || (dump == 0 && old_tracelevel == 0 && tracelevel != 0))
 281                 trace_dump();
 282 }
 283
 284
 285 void
 286 set_tracefile(const char *filename,
 287               const char *pat,
 288               int dump)                 /* -1=no dump, 0=default, 1=force */
 289 {
 290         struct stat stbuf;
 291         FILE *n_ftrace;
 292         const char *fn;
 293
 294
 295         /* Allow a null filename to increase the level if the trace file
 296          * is already open or if coming from a trusted source, such as
 297          * a signal or the command line.
 298          */
 299         if (filename == NULL || filename[0] == '\0') {
 300                 filename = NULL;
 301                 if (ftrace == NULL) {
 302                         if (inittracename[0] == '\0') {
 303                                 msglog("missing trace file name");
 304                                 return;
 305                         }
 306                         fn = inittracename;
 307                 } else {
 308                         fn = NULL;
 309                 }
 310
 311         } else if (!strcmp(filename,"dump/../table")) {
 312                 trace_dump();
 313                 return;
 314
 315         } else {
 316                 /* Allow the file specified with "-T file" to be reopened,
 317                  * but require all other names specified over the net to
 318                  * match the official path.  The path can specify a directory
 319                  * in which the file is to be created.
 320                  */
 321                 if (strcmp(filename, inittracename)
 322 #ifdef _PATH_TRACE
 323                     && (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
 324                         || strstr(filename,"../")
 325                         || 0 > stat(_PATH_TRACE, &stbuf))
 326 #endif
 327                     ) {
 328                         msglog("wrong trace file \"%s\"", filename);
 329                         return;
 330                 }
 331
 332                 /* If the new tracefile exists, it must be a regular file.
 333                  */
 334                 if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
 335                         msglog("wrong type (%#x) of trace file \"%s\"",
 336                                stbuf.st_mode, filename);
 337                         return;
 338                 }
 339
 340                 fn = filename;
 341         }
 342
 343         if (fn != NULL) {
 344                 n_ftrace = fopen(fn, "a");
 345                 if (n_ftrace == NULL) {
 346                         msglog("failed to open trace file \"%s\" %s",
 347                                fn, strerror(errno));
 348                         if (fn == inittracename)
 349                                 inittracename[0] = '\0';
 350                         return;
 351                 }
 352
 353                 tmsg("switch to trace file %s", fn);
 354
 355                 trace_close(file_trace = 1);
 356
 357                 if (fn != savetracename)
 358                         strncpy(savetracename, fn, sizeof(savetracename)-1);
 359                 ftrace = n_ftrace;
 360
 361                 fflush(stdout);
 362                 fflush(stderr);
 363                 dup2(fileno(ftrace), STDOUT_FILENO);
 364                 dup2(fileno(ftrace), STDERR_FILENO);
 365         }
 366
 367         if (new_tracelevel == 0 || filename == NULL)
 368                 new_tracelevel++;
 369         tracelevel_msg(pat, dump != 0 ? dump : (filename != NULL));
 370 }
 371
 372
 373 /* ARGSUSED */
 374 void
 375 sigtrace_on(int s UNUSED)
 376 {
 377         new_tracelevel++;
 378         sigtrace_pat = "SIGUSR1: %s";
 379 }
 380
 381
 382 /* ARGSUSED */
 383 void
 384 sigtrace_off(int s UNUSED)
 385 {
 386         new_tracelevel--;
 387         sigtrace_pat = "SIGUSR2: %s";
 388 }
 389
 390
 391 /* Set tracing after a signal.
 392  */
 393 void
 394 set_tracelevel(void)
 395 {
 396         if (new_tracelevel == tracelevel)
 397                 return;
 398
 399         /* If tracing entirely off, and there was no tracefile specified
 400          * on the command line, then leave it off.
 401          */
 402         if (new_tracelevel > tracelevel && ftrace == NULL) {
 403                 if (savetracename[0] != '\0') {
 404                         set_tracefile(savetracename,sigtrace_pat,0);
 405                 } else if (inittracename[0] != '\0') {
 406                                 set_tracefile(inittracename,sigtrace_pat,0);
 407                 } else {
 408                         new_tracelevel = 0;
 409                         return;
 410                 }
 411         } else {
 412                 tracelevel_msg(sigtrace_pat, 0);
 413         }
 414 }
 415
 416
 417 /* display an address
 418  */
 419 char *
 420 addrname(naddr  addr,                   /* in network byte order */
 421          naddr  mask,
 422          int    force)                  /* 0=show mask if nonstandard, */
 423 {                                       /*      1=always show mask, 2=never */
 424 #define NUM_BUFS 4
 425         static int bufno;
 426         static struct {
 427             char    str[15+20];
 428         } bufs[NUM_BUFS];
 429         char *s, *sp;
 430         naddr dmask;
 431         size_t l;
 432         int i;
 433
 434         strlcpy(bufs[bufno].str, naddr_ntoa(addr), sizeof(bufs[bufno].str));
 435         s = bufs[bufno].str;
 436         l = sizeof(bufs[bufno].str);
 437         bufno = (bufno+1) % NUM_BUFS;
 438
 439         if (force == 1 || (force == 0 && mask != std_mask(addr))) {
 440                 sp = &s[strlen(s)];
 441
 442                 dmask = mask & -mask;
 443                 if (mask + dmask == 0) {
 444                         for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
 445                                 continue;
 446                         (void)snprintf(sp, s + l - sp, "/%d", 32-i);
 447
 448                 } else {
 449                         (void)snprintf(sp, s + l - sp, " (mask %#x)",
 450                             (u_int)mask);
 451                 }
 452         }
 453
 454         return s;
 455 #undef NUM_BUFS
 456 }
 457
 458
 459 /* display a bit-field
 460  */
 461 struct bits {
 462         u_int   bits_mask;
 463         u_int   bits_clear;
 464         const char *bits_name;
 465 };
 466
 467 static const struct bits if_bits[] = {
 468         { IFF_LOOPBACK,         0,              "LOOPBACK" },
 469         { IFF_POINTOPOINT,      0,              "PT-TO-PT" },
 470         { 0,                    0,              0}
 471 };
 472
 473 static const struct bits is_bits[] = {
 474         { IS_ALIAS,             0,              "ALIAS" },
 475         { IS_SUBNET,            0,              "" },
 476         { IS_REMOTE,            (IS_NO_RDISC
 477                                  | IS_BCAST_RDISC), "REMOTE" },
 478         { IS_PASSIVE,           (IS_NO_RDISC
 479                                  | IS_NO_RIP
 480                                  | IS_NO_SUPER_AG
 481                                  | IS_PM_RDISC
 482                                  | IS_NO_AG),   "PASSIVE" },
 483         { IS_EXTERNAL,          0,              "EXTERNAL" },
 484         { IS_CHECKED,           0,              "" },
 485         { IS_ALL_HOSTS,         0,              "" },
 486         { IS_ALL_ROUTERS,       0,              "" },
 487         { IS_DISTRUST,          0,              "DISTRUST" },
 488         { IS_BROKE,             IS_SICK,        "BROKEN" },
 489         { IS_SICK,              0,              "SICK" },
 490         { IS_DUP,               0,              "DUPLICATE" },
 491         { IS_REDIRECT_OK,       0,              "REDIRECT_OK" },
 492         { IS_NEED_NET_SYN,      0,              "" },
 493         { IS_NO_AG,             IS_NO_SUPER_AG, "NO_AG" },
 494         { IS_NO_SUPER_AG,       0,              "NO_SUPER_AG" },
 495         { (IS_NO_RIPV1_IN
 496            | IS_NO_RIPV2_IN
 497            | IS_NO_RIPV1_OUT
 498            | IS_NO_RIPV2_OUT),  0,              "NO_RIP" },
 499         { (IS_NO_RIPV1_IN
 500            | IS_NO_RIPV1_OUT),  0,              "RIPV2" },
 501         { IS_NO_RIPV1_IN,       0,              "NO_RIPV1_IN" },
 502         { IS_NO_RIPV2_IN,       0,              "NO_RIPV2_IN" },
 503         { IS_NO_RIPV1_OUT,      0,              "NO_RIPV1_OUT" },
 504         { IS_NO_RIPV2_OUT,      0,              "NO_RIPV2_OUT" },
 505         { (IS_NO_ADV_IN
 506            | IS_NO_SOL_OUT
 507            | IS_NO_ADV_OUT),    IS_BCAST_RDISC, "NO_RDISC" },
 508         { IS_NO_SOL_OUT,        0,              "NO_SOLICIT" },
 509         { IS_SOL_OUT,           0,              "SEND_SOLICIT" },
 510         { IS_NO_ADV_OUT,        IS_BCAST_RDISC, "NO_RDISC_ADV" },
 511         { IS_ADV_OUT,           0,              "RDISC_ADV" },
 512         { IS_BCAST_RDISC,       0,              "BCAST_RDISC" },
 513         { IS_PM_RDISC,          0,              "" },
 514         { 0,                    0,              "%#x"}
 515 };
 516
 517 static const struct bits rs_bits[] = {
 518         { RS_IF,                0,              "IF" },
 519         { RS_NET_INT,           RS_NET_SYN,     "NET_INT" },
 520         { RS_NET_SYN,           0,              "NET_SYN" },
 521         { RS_SUBNET,            0,              "" },
 522         { RS_LOCAL,             0,              "LOCAL" },
 523         { RS_MHOME,             0,              "MHOME" },
 524         { RS_STATIC,            0,              "STATIC" },
 525         { RS_RDISC,             0,              "RDISC" },
 526         { 0,                    0,              "%#x"}
 527 };
 528
 529
 530 static void
 531 trace_bits(const struct bits *tbl,
 532            u_int field,
 533            int force)
 534 {
 535         u_int b;
 536         char c;
 537
 538         if (force) {
 539                 (void)putc('<', ftrace);
 540                 c = 0;
 541         } else {
 542                 c = '<';
 543         }
 544
 545         while (field != 0
 546                && (b = tbl->bits_mask) != 0) {
 547                 if ((b & field) == b) {
 548                         if (tbl->bits_name[0] != '\0') {
 549                                 if (c)
 550                                         (void)putc(c, ftrace);
 551                                 (void)fprintf(ftrace, "%s", tbl->bits_name);
 552                                 c = '|';
 553                         }
 554                         if (0 == (field &= ~(b | tbl->bits_clear)))
 555                                 break;
 556                 }
 557                 tbl++;
 558         }
 559         if (field != 0 && tbl->bits_name != NULL) {
 560                 if (c)
 561                         (void)putc(c, ftrace);
 562                 (void)fprintf(ftrace, tbl->bits_name, field);
 563                 c = '|';
 564         }
 565
 566         if (c != '<' || force)
 567                 (void)fputs("> ", ftrace);
 568 }
 569
 570
 571 char *
 572 rtname(naddr dst,
 573        naddr mask,
 574        naddr gate)
 575 {
 576         static char buf[3*4+3+1+2+3     /* "xxx.xxx.xxx.xxx/xx-->" */
 577                         +3*4+3+1];      /* "xxx.xxx.xxx.xxx" */
 578         int i;
 579
 580         i = sprintf(buf, "%-16s-->", addrname(dst, mask, 0));
 581         (void)sprintf(&buf[i], "%-*s", 15+20-MAX(20,i), naddr_ntoa(gate));
 582         return buf;
 583 }
 584
 585
 586 static void
 587 print_rts(struct rt_spare *rts,
 588           int force_metric,             /* -1=suppress, 0=default */
 589           int force_ifp,                /* -1=suppress, 0=default */
 590           int force_router,             /* -1=suppress, 0=default, 1=display */
 591           int force_tag,                /* -1=suppress, 0=default, 1=display */
 592           int force_time)               /* 0=suppress, 1=display */
 593 {
 594         int i;
 595
 596
 597         if (force_metric >= 0)
 598                 (void)fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
 599         if (force_ifp >= 0)
 600                 (void)fprintf(ftrace, "%s ", (rts->rts_ifp == NULL ?
 601                                               "if?" : rts->rts_ifp->int_name));
 602         if (force_router > 0
 603             || (force_router == 0 && rts->rts_router != rts->rts_gate))
 604                 (void)fprintf(ftrace, "router=%s ",
 605                               naddr_ntoa(rts->rts_router));
 606         if (force_time > 0)
 607                 (void)fprintf(ftrace, "%s ", ts(rts->rts_time));
 608         if (force_tag > 0
 609             || (force_tag == 0 && rts->rts_tag != 0))
 610                 (void)fprintf(ftrace, "tag=%#x ", ntohs(rts->rts_tag));
 611         if (rts->rts_de_ag != 0) {
 612                 for (i = 1; (u_int)(1 << i) <= rts->rts_de_ag; i++)
 613                         continue;
 614                 (void)fprintf(ftrace, "de_ag=%d ", i);
 615         }
 616
 617 }
 618
 619
 620 void
 621 trace_if(const char *act,
 622          struct interface *ifp)
 623 {
 624         if (!TRACEACTIONS || ftrace == NULL)
 625                 return;
 626
 627         lastlog();
 628         (void)fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
 629         (void)fprintf(ftrace, "%-15s-->%-15s ",
 630                       naddr_ntoa(ifp->int_addr),
 631                       addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
 632                                 ? ifp->int_dstaddr
 633                                 : htonl(ifp->int_net)),
 634                                ifp->int_mask, 1));
 635         if (ifp->int_metric != 0)
 636                 (void)fprintf(ftrace, "metric=%d ", ifp->int_metric);
 637         if (ifp->int_adj_inmetric != 0)
 638                 (void)fprintf(ftrace, "adj_inmetric=%u ",
 639                               ifp->int_adj_inmetric);
 640         if (ifp->int_adj_outmetric != 0)
 641                 (void)fprintf(ftrace, "adj_outmetric=%u ",
 642                               ifp->int_adj_outmetric);
 643         if (!IS_RIP_OUT_OFF(ifp->int_state)
 644             && ifp->int_d_metric != 0)
 645                 (void)fprintf(ftrace, "fake_default=%u ", ifp->int_d_metric);
 646         trace_bits(if_bits, ifp->int_if_flags, 0);
 647         trace_bits(is_bits, ifp->int_state, 0);
 648         (void)fputc('\n',ftrace);
 649 }
 650
 651
 652 void
 653 trace_upslot(struct rt_entry *rt,
 654              struct rt_spare *rts,
 655              struct rt_spare *new)
 656 {
 657         if (!TRACEACTIONS || ftrace == NULL)
 658                 return;
 659
 660         if (rts->rts_gate == new->rts_gate
 661             && rts->rts_router == new->rts_router
 662             && rts->rts_metric == new->rts_metric
 663             && rts->rts_tag == new->rts_tag
 664             && rts->rts_de_ag == new->rts_de_ag)
 665                 return;
 666
 667         lastlog();
 668         if (new->rts_gate == 0) {
 669                 (void)fprintf(ftrace, "Del #%d %-35s ",
 670                               (int)(rts - rt->rt_spares),
 671                               rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 672                 print_rts(rts, 0,0,0,0,
 673                           (rts != rt->rt_spares
 674                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 675
 676         } else if (rts->rts_gate != RIP_DEFAULT) {
 677                 (void)fprintf(ftrace, "Chg #%d %-35s ",
 678                               (int)(rts - rt->rt_spares),
 679                               rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 680                 print_rts(rts, 0,0,
 681                           rts->rts_gate != new->rts_gate,
 682                           rts->rts_tag != new->rts_tag,
 683                           rts != rt->rt_spares || AGE_RT(rt->rt_state,
 684                                                         rt->rt_ifp));
 685
 686                 (void)fprintf(ftrace, "\n       %19s%-16s ", "",
 687                               (new->rts_gate != rts->rts_gate
 688                                ? naddr_ntoa(new->rts_gate) : ""));
 689                 print_rts(new,
 690                           -(new->rts_metric == rts->rts_metric),
 691                           -(new->rts_ifp == rts->rts_ifp),
 692                           0,
 693                           rts->rts_tag != new->rts_tag,
 694                           (new->rts_time != rts->rts_time
 695                            && (rts != rt->rt_spares
 696                                || AGE_RT(rt->rt_state, new->rts_ifp))));
 697
 698         } else {
 699                 (void)fprintf(ftrace, "Add #%d %-35s ",
 700                               (int)(rts - rt->rt_spares),
 701                               rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
 702                 print_rts(new, 0,0,0,0,
 703                           (rts != rt->rt_spares
 704                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 705         }
 706         (void)fputc('\n',ftrace);
 707 }
 708
 709
 710 /* miscellaneous message checked by the caller
 711  */
 712 void
 713 trace_misc(const char *p, ...)
 714 {
 715         va_list args;
 716
 717         if (ftrace == NULL)
 718                 return;
 719
 720         lastlog();
 721         va_start(args, p);
 722         vfprintf(ftrace, p, args);
 723         va_end(args);
 724         (void)fputc('\n',ftrace);
 725 }
 726
 727
 728 /* display a message if tracing actions
 729  */
 730 void
 731 trace_act(const char *p, ...)
 732 {
 733         va_list args;
 734
 735         if (!TRACEACTIONS || ftrace == NULL)
 736                 return;
 737
 738         lastlog();
 739         va_start(args, p);
 740         vfprintf(ftrace, p, args);
 741         va_end(args);
 742         (void)fputc('\n',ftrace);
 743 }
 744
 745
 746 /* display a message if tracing packets
 747  */
 748 void
 749 trace_pkt(const char *p, ...)
 750 {
 751         va_list args;
 752
 753         if (!TRACEPACKETS || ftrace == NULL)
 754                 return;
 755
 756         lastlog();
 757         va_start(args, p);
 758         vfprintf(ftrace, p, args);
 759         va_end(args);
 760         (void)fputc('\n',ftrace);
 761 }
 762
 763
 764 void
 765 trace_change(struct rt_entry *rt,
 766              u_int      state,
 767              struct     rt_spare *new,
 768              const char *label)
 769 {
 770         if (ftrace == NULL)
 771                 return;
 772
 773         if (rt->rt_metric == new->rts_metric
 774             && rt->rt_gate == new->rts_gate
 775             && rt->rt_router == new->rts_router
 776             && rt->rt_state == state
 777             && rt->rt_tag == new->rts_tag
 778             && rt->rt_de_ag == new->rts_de_ag)
 779                 return;
 780
 781         lastlog();
 782         (void)fprintf(ftrace, "%s %-35s ",
 783                       label,
 784                       rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 785         print_rts(rt->rt_spares,
 786                   0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
 787         trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
 788
 789         (void)fprintf(ftrace, "\n%*s %19s%-16s ",
 790                       (int)strlen(label), "", "",
 791                       (rt->rt_gate != new->rts_gate
 792                        ? naddr_ntoa(new->rts_gate) : ""));
 793         print_rts(new,
 794                   -(new->rts_metric == rt->rt_metric),
 795                   -(new->rts_ifp == rt->rt_ifp),
 796                   0,
 797                   rt->rt_tag != new->rts_tag,
 798                   (rt->rt_time != new->rts_time
 799                    && AGE_RT(rt->rt_state,new->rts_ifp)));
 800         if (rt->rt_state != state)
 801                 trace_bits(rs_bits, state, 1);
 802         (void)fputc('\n',ftrace);
 803 }
 804
 805
 806 void
 807 trace_add_del(const char * action, struct rt_entry *rt)
 808 {
 809         if (ftrace == NULL)
 810                 return;
 811
 812         lastlog();
 813         (void)fprintf(ftrace, "%s    %-35s ",
 814                       action,
 815                       rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 816         print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
 817         trace_bits(rs_bits, rt->rt_state, 0);
 818         (void)fputc('\n',ftrace);
 819 }
 820
 821
 822 /* ARGSUSED */
 823 static int
 824 walk_trace(struct radix_node *rn,
 825            struct walkarg *w UNUSED)
 826 {
 827 #define RT ((struct rt_entry *)rn)
 828         struct rt_spare *rts;
 829         int i;
 830
 831         (void)fprintf(ftrace, "  %-35s ",
 832                       rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
 833         print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp));
 834         trace_bits(rs_bits, RT->rt_state, 0);
 835         if (RT->rt_poison_time >= now_garbage
 836             && RT->rt_poison_metric < RT->rt_metric)
 837                 (void)fprintf(ftrace, "pm=%d@%s",
 838                               RT->rt_poison_metric, ts(RT->rt_poison_time));
 839
 840         rts = &RT->rt_spares[1];
 841         for (i = 1; i < NUM_SPARES; i++, rts++) {
 842                 if (rts->rts_gate != RIP_DEFAULT) {
 843                         (void)fprintf(ftrace,"\n    #%d%15s%-16s ",
 844                                       i, "", naddr_ntoa(rts->rts_gate));
 845                         print_rts(rts, 0,0,0,0,1);
 846                 }
 847         }
 848         (void)fputc('\n',ftrace);
 849
 850         return 0;
 851 }
 852
 853
 854 static void
 855 trace_dump(void)
 856 {
 857         struct interface *ifp;
 858
 859         if (ftrace == NULL)
 860                 return;
 861         lastlog();
 862
 863         (void)fputs("current daemon state:\n", ftrace);
 864         LIST_FOREACH(ifp, &ifnet, int_list)
 865                 trace_if("", ifp);
 866         (void)rn_walktree(rhead, walk_trace, 0);
 867 }
 868
 869
 870 void
 871 trace_rip(const char *dir1, const char *dir2,
 872           struct sockaddr_in *who,
 873           struct interface *ifp,
 874           struct rip *msg,
 875           int size)                     /* total size of message */
 876 {
 877         struct netinfo *n, *lim;
 878 #       define NA ((struct netauth*)n)
 879         int i, seen_route;
 880
 881         if (!TRACEPACKETS || ftrace == NULL)
 882                 return;
 883
 884         lastlog();
 885         if (msg->rip_cmd >= RIPCMD_MAX
 886             || msg->rip_vers == 0) {
 887                 (void)fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
 888                               " %s.%d size=%d\n",
 889                               dir1, msg->rip_vers, msg->rip_cmd, dir2,
 890                               naddr_ntoa(who->sin_addr.s_addr),
 891                               ntohs(who->sin_port),
 892                               size);
 893                 return;
 894         }
 895
 896         (void)fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
 897                       dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
 898                       naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
 899                       ifp ? " via " : "", ifp ? ifp->int_name : "");
 900         if (!TRACECONTENTS)
 901                 return;
 902
 903         seen_route = 0;
 904         switch (msg->rip_cmd) {
 905         case RIPCMD_REQUEST:
 906         case RIPCMD_RESPONSE:
 907                 n = msg->rip_nets;
 908                 lim = (struct netinfo *)((char*)msg + size);
 909                 for (; n < lim; n++) {
 910                         if (!seen_route
 911                             && n->n_family == RIP_AF_UNSPEC
 912                             && ntohl(n->n_metric) == HOPCNT_INFINITY
 913                             && msg->rip_cmd == RIPCMD_REQUEST
 914                             && (n+1 == lim
 915                                 || (n+2 == lim
 916                                     && (n+1)->n_family == RIP_AF_AUTH))) {
 917                                 (void)fputs("\tQUERY ", ftrace);
 918                                 if (n->n_dst != 0)
 919                                         (void)fprintf(ftrace, "%s ",
 920                                                       naddr_ntoa(n->n_dst));
 921                                 if (n->n_mask != 0)
 922                                         (void)fprintf(ftrace, "mask=%#x ",
 923                                                       (u_int)ntohl(n->n_mask));
 924                                 if (n->n_nhop != 0)
 925                                         (void)fprintf(ftrace, "nhop=%s ",
 926                                                       naddr_ntoa(n->n_nhop));
 927                                 if (n->n_tag != 0)
 928                                         (void)fprintf(ftrace, "tag=%#x ",
 929                                                       ntohs(n->n_tag));
 930                                 (void)fputc('\n',ftrace);
 931                                 continue;
 932                         }
 933
 934                         if (n->n_family == RIP_AF_AUTH) {
 935                                 if (NA->a_type == RIP_AUTH_PW
 936                                     && n == msg->rip_nets) {
 937                                         (void)fprintf(ftrace, "\tPassword"
 938                                                       " Authentication:"
 939                                                       " \"%s\"\n",
 940                                                       qstring(NA->au.au_pw,
 941                                                           RIP_AUTH_PW_LEN));
 942                                         continue;
 943                                 }
 944
 945                                 if (NA->a_type == RIP_AUTH_MD5
 946                                     && n == msg->rip_nets) {
 947                                         (void)fprintf(ftrace,
 948                                                       "\tMD5 Auth"
 949                                                       " pkt_len=%d KeyID=%u"
 950                                                       " auth_len=%d"
 951                                                       " seqno=%#x"
 952                                                       " rsvd=%#x,%#x\n",
 953                                             ntohs(NA->au.a_md5.md5_pkt_len),
 954                                             NA->au.a_md5.md5_keyid,
 955                                             NA->au.a_md5.md5_auth_len,
 956                                             (int)ntohl(NA->au.a_md5.md5_seqno),
 957                                             (int)ntohs(NA->au.a_md5.rsvd[0]),
 958                                             (int)ntohs(NA->au.a_md5.rsvd[1]));
 959                                         continue;
 960                                 }
 961                                 (void)fprintf(ftrace,
 962                                               "\tAuthentication type %d: ",
 963                                               ntohs(NA->a_type));
 964                                 for (i = 0;
 965                                      i < (int)sizeof(NA->au.au_pw);
 966                                      i++)
 967                                         (void)fprintf(ftrace, "%02x ",
 968                                                       NA->au.au_pw[i]);
 969                                 (void)fputc('\n',ftrace);
 970                                 continue;
 971                         }
 972
 973                         seen_route = 1;
 974                         if (n->n_family != RIP_AF_INET) {
 975                                 (void)fprintf(ftrace,
 976                                               "\t(af %d) %-18s mask=%#x ",
 977                                               ntohs(n->n_family),
 978                                               naddr_ntoa(n->n_dst),
 979                                               (u_int)ntohl(n->n_mask));
 980                         } else if (msg->rip_vers == RIPv1) {
 981                                 (void)fprintf(ftrace, "\t%-18s ",
 982                                               addrname(n->n_dst,
 983                                                        ntohl(n->n_mask),
 984                                                        n->n_mask==0 ? 2 : 1));
 985                         } else {
 986                                 (void)fprintf(ftrace, "\t%-18s ",
 987                                               addrname(n->n_dst,
 988                                                        ntohl(n->n_mask),
 989                                                        n->n_mask==0 ? 2 : 0));
 990                         }
 991                         (void)fprintf(ftrace, "metric=%-2d ",
 992                                       (u_int)ntohl(n->n_metric));
 993                         if (n->n_nhop != 0)
 994                                 (void)fprintf(ftrace, " nhop=%s ",
 995                                               naddr_ntoa(n->n_nhop));
 996                         if (n->n_tag != 0)
 997                                 (void)fprintf(ftrace, "tag=%#x",
 998                                               ntohs(n->n_tag));
 999                         (void)fputc('\n',ftrace);
1000                 }
1001                 if (size != (char *)n - (char *)msg)
1002                         (void)fprintf(ftrace, "truncated record, len %d\n",
1003                                 size);
1004                 break;
1005
1006         case RIPCMD_TRACEON:
1007                 fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
1008                         msg->rip_tracefile);
1009                 break;
1010
1011         case RIPCMD_TRACEOFF:
1012                 break;
1013         }
1014 }