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  * 4. 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  * $FreeBSD$
  30  */
  31
  32 #define RIPCMDS
  33 #include "defs.h"
  34 #include "pathnames.h"
  35 #include <sys/stat.h>
  36 #include <sys/signal.h>
  37 #include <fcntl.h>
  38
  39 #ifdef __NetBSD__
  40 __RCSID("$NetBSD$");
  41 #elif defined(__FreeBSD__)
  42 __RCSID("$FreeBSD$");
  43 #else
  44 __RCSID("$Revision: 2.27 $");
  45 #ident "$Revision: 2.27 $"
  46 #endif
  47
  48
  49 #ifdef sgi
  50 /* use *stat64 for files on large file systems */
  51 #define stat    stat64
  52 #endif
  53
  54 int     tracelevel, new_tracelevel;
  55 FILE    *ftrace;                        /* output trace file */
  56 static const char *sigtrace_pat = "%s";
  57 static char savetracename[PATH_MAX];
  58 char    inittracename[PATH_MAX];
  59 static int file_trace;                  /* 1=tracing to file, not stdout */
  60
  61 static void trace_dump(void);
  62 static void tmsg(const char *, ...) PATTRIB(1,2);
  63
  64
  65 /* convert string to printable characters
  66  */
  67 static char *
  68 qstring(u_char *s, int len)
  69 {
  70         static char buf[8*20+1];
  71         char *p;
  72         u_char *s2, c;
  73
  74
  75         for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
  76                 c = *s++;
  77                 if (c == '\0') {
  78                         for (s2 = s+1; s2 < &s[len]; s2++) {
  79                                 if (*s2 != '\0')
  80                                         break;
  81                         }
  82                         if (s2 >= &s[len])
  83                             goto exit;
  84                 }
  85
  86                 if (c >= ' ' && c < 0x7f && c != '\\') {
  87                         *p++ = c;
  88                         continue;
  89                 }
  90                 *p++ = '\\';
  91                 switch (c) {
  92                 case '\\':
  93                         *p++ = '\\';
  94                         break;
  95                 case '\n':
  96                         *p++= 'n';
  97                         break;
  98                 case '\r':
  99                         *p++= 'r';
 100                         break;
 101                 case '\t':
 102                         *p++ = 't';
 103                         break;
 104                 case '\b':
 105                         *p++ = 'b';
 106                         break;
 107                 default:
 108                         p += sprintf(p,"%o",c);
 109                         break;
 110                 }
 111         }
 112 exit:
 113         *p = '\0';
 114         return buf;
 115 }
 116
 117
 118 /* convert IP address to a string, but not into a single buffer
 119  */
 120 char *
 121 naddr_ntoa(naddr a)
 122 {
 123 #define NUM_BUFS 4
 124         static int bufno;
 125         static struct {
 126             char    str[16];            /* xxx.xxx.xxx.xxx\0 */
 127         } bufs[NUM_BUFS];
 128         char *s;
 129         struct in_addr addr;
 130
 131         addr.s_addr = a;
 132         s = strcpy(bufs[bufno].str, inet_ntoa(addr));
 133         bufno = (bufno+1) % NUM_BUFS;
 134         return s;
 135 #undef NUM_BUFS
 136 }
 137
 138
 139 const char *
 140 saddr_ntoa(struct sockaddr *sa)
 141 {
 142         return (sa == NULL) ? "?" : naddr_ntoa(S_ADDR(sa));
 143 }
 144
 145
 146 static char *
 147 ts(time_t secs) {
 148         static char s[20];
 149
 150         secs += epoch.tv_sec;
 151 #ifdef sgi
 152         (void)cftime(s, "%T", &secs);
 153 #else
 154         memcpy(s, ctime(&secs)+11, 8);
 155         s[8] = '\0';
 156 #endif
 157         return s;
 158 }
 159
 160
 161 /* On each event, display a time stamp.
 162  * This assumes that 'now' is update once for each event, and
 163  * that at least now.tv_usec changes.
 164  */
 165 static struct timeval lastlog_time;
 166
 167 void
 168 lastlog(void)
 169 {
 170         if (lastlog_time.tv_sec != now.tv_sec
 171             || lastlog_time.tv_usec != now.tv_usec) {
 172                 (void)fprintf(ftrace, "-- %s --\n", ts(now.tv_sec));
 173                 lastlog_time = now;
 174         }
 175 }
 176
 177
 178 static void
 179 tmsg(const char *p, ...)
 180 {
 181         va_list args;
 182
 183         if (ftrace != NULL) {
 184                 lastlog();
 185                 va_start(args, p);
 186                 vfprintf(ftrace, p, args);
 187                 va_end(args);
 188                 (void)fputc('\n',ftrace);
 189                 fflush(ftrace);
 190         }
 191 }
 192
 193
 194 void
 195 trace_close(int zap_stdio)
 196 {
 197         int fd;
 198
 199
 200         fflush(stdout);
 201         fflush(stderr);
 202
 203         if (ftrace != NULL && zap_stdio) {
 204                 if (ftrace != stdout)
 205                         fclose(ftrace);
 206                 ftrace = NULL;
 207                 fd = open(_PATH_DEVNULL, O_RDWR);
 208                 if (fd < 0)
 209                         return;
 210                 if (isatty(STDIN_FILENO))
 211                         (void)dup2(fd, STDIN_FILENO);
 212                 if (isatty(STDOUT_FILENO))
 213                         (void)dup2(fd, STDOUT_FILENO);
 214                 if (isatty(STDERR_FILENO))
 215                         (void)dup2(fd, STDERR_FILENO);
 216                 (void)close(fd);
 217         }
 218         lastlog_time.tv_sec = 0;
 219 }
 220
 221
 222 void
 223 trace_flush(void)
 224 {
 225         if (ftrace != NULL) {
 226                 fflush(ftrace);
 227                 if (ferror(ftrace))
 228                         trace_off("tracing off: %s", strerror(ferror(ftrace)));
 229         }
 230 }
 231
 232
 233 void
 234 trace_off(const char *p, ...)
 235 {
 236         va_list args;
 237
 238
 239         if (ftrace != NULL) {
 240                 lastlog();
 241                 va_start(args, p);
 242                 vfprintf(ftrace, p, args);
 243                 va_end(args);
 244                 (void)fputc('\n',ftrace);
 245         }
 246         trace_close(file_trace);
 247
 248         new_tracelevel = tracelevel = 0;
 249 }
 250
 251
 252 /* log a change in tracing
 253  */
 254 void
 255 tracelevel_msg(const char *pat,
 256                int dump)                /* -1=no dump, 0=default, 1=force */
 257 {
 258         static const char * const off_msgs[MAX_TRACELEVEL] = {
 259                 "Tracing actions stopped",
 260                 "Tracing packets stopped",
 261                 "Tracing packet contents stopped",
 262                 "Tracing kernel changes stopped",
 263         };
 264         static const char * const on_msgs[MAX_TRACELEVEL] = {
 265                 "Tracing actions started",
 266                 "Tracing packets started",
 267                 "Tracing packet contents started",
 268                 "Tracing kernel changes started",
 269         };
 270         u_int old_tracelevel = tracelevel;
 271
 272
 273         if (new_tracelevel < 0)
 274                 new_tracelevel = 0;
 275         else if (new_tracelevel > MAX_TRACELEVEL)
 276                 new_tracelevel = MAX_TRACELEVEL;
 277
 278         if (new_tracelevel < tracelevel) {
 279                 if (new_tracelevel <= 0) {
 280                         trace_off(pat, off_msgs[0]);
 281                 } else do {
 282                         tmsg(pat, off_msgs[tracelevel]);
 283                 }
 284                 while (--tracelevel != new_tracelevel);
 285
 286         } else if (new_tracelevel > tracelevel) {
 287                 do {
 288                         tmsg(pat, on_msgs[tracelevel++]);
 289                 } while (tracelevel != new_tracelevel);
 290         }
 291
 292         if (dump > 0
 293             || (dump == 0 && old_tracelevel == 0 && tracelevel != 0))
 294                 trace_dump();
 295 }
 296
 297
 298 void
 299 set_tracefile(const char *filename,
 300               const char *pat,
 301               int dump)                 /* -1=no dump, 0=default, 1=force */
 302 {
 303         struct stat stbuf;
 304         FILE *n_ftrace;
 305         const char *fn;
 306
 307
 308         /* Allow a null filename to increase the level if the trace file
 309          * is already open or if coming from a trusted source, such as
 310          * a signal or the command line.
 311          */
 312         if (filename == NULL || filename[0] == '\0') {
 313                 filename = NULL;
 314                 if (ftrace == NULL) {
 315                         if (inittracename[0] == '\0') {
 316                                 msglog("missing trace file name");
 317                                 return;
 318                         }
 319                         fn = inittracename;
 320                 } else {
 321                         fn = NULL;
 322                 }
 323
 324         } else if (!strcmp(filename,"dump/../table")) {
 325                 trace_dump();
 326                 return;
 327
 328         } else {
 329                 /* Allow the file specified with "-T file" to be reopened,
 330                  * but require all other names specified over the net to
 331                  * match the official path.  The path can specify a directory
 332                  * in which the file is to be created.
 333                  */
 334                 if (strcmp(filename, inittracename)
 335 #ifdef _PATH_TRACE
 336                     && (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
 337                         || strstr(filename,"../")
 338                         || 0 > stat(_PATH_TRACE, &stbuf))
 339 #endif
 340                     ) {
 341                         msglog("wrong trace file \"%s\"", filename);
 342                         return;
 343                 }
 344
 345                 /* If the new tracefile exists, it must be a regular file.
 346                  */
 347                 if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
 348                         msglog("wrong type (%#x) of trace file \"%s\"",
 349                                stbuf.st_mode, filename);
 350                         return;
 351                 }
 352
 353                 fn = filename;
 354         }
 355
 356         if (fn != NULL) {
 357                 n_ftrace = fopen(fn, "a");
 358                 if (n_ftrace == NULL) {
 359                         msglog("failed to open trace file \"%s\" %s",
 360                                fn, strerror(errno));
 361                         if (fn == inittracename)
 362                                 inittracename[0] = '\0';
 363                         return;
 364                 }
 365
 366                 tmsg("switch to trace file %s", fn);
 367
 368                 trace_close(file_trace = 1);
 369
 370                 if (fn != savetracename)
 371                         strncpy(savetracename, fn, sizeof(savetracename)-1);
 372                 ftrace = n_ftrace;
 373
 374                 fflush(stdout);
 375                 fflush(stderr);
 376                 dup2(fileno(ftrace), STDOUT_FILENO);
 377                 dup2(fileno(ftrace), STDERR_FILENO);
 378         }
 379
 380         if (new_tracelevel == 0 || filename == NULL)
 381                 new_tracelevel++;
 382         tracelevel_msg(pat, dump != 0 ? dump : (filename != NULL));
 383 }
 384
 385
 386 /* ARGSUSED */
 387 void
 388 sigtrace_on(int s UNUSED)
 389 {
 390         new_tracelevel++;
 391         sigtrace_pat = "SIGUSR1: %s";
 392 }
 393
 394
 395 /* ARGSUSED */
 396 void
 397 sigtrace_off(int s UNUSED)
 398 {
 399         new_tracelevel--;
 400         sigtrace_pat = "SIGUSR2: %s";
 401 }
 402
 403
 404 /* Set tracing after a signal.
 405  */
 406 void
 407 set_tracelevel(void)
 408 {
 409         if (new_tracelevel == tracelevel)
 410                 return;
 411
 412         /* If tracing entirely off, and there was no tracefile specified
 413          * on the command line, then leave it off.
 414          */
 415         if (new_tracelevel > tracelevel && ftrace == NULL) {
 416                 if (savetracename[0] != '\0') {
 417                         set_tracefile(savetracename,sigtrace_pat,0);
 418                 } else if (inittracename[0] != '\0') {
 419                                 set_tracefile(inittracename,sigtrace_pat,0);
 420                 } else {
 421                         new_tracelevel = 0;
 422                         return;
 423                 }
 424         } else {
 425                 tracelevel_msg(sigtrace_pat, 0);
 426         }
 427 }
 428
 429
 430 /* display an address
 431  */
 432 char *
 433 addrname(naddr  addr,                   /* in network byte order */
 434          naddr  mask,
 435          int    force)                  /* 0=show mask if nonstandard, */
 436 {                                       /*      1=always show mask, 2=never */
 437 #define NUM_BUFS 4
 438         static int bufno;
 439         static struct {
 440             char    str[15+20];
 441         } bufs[NUM_BUFS];
 442         char *s, *sp;
 443         naddr dmask;
 444         size_t l;
 445         int i;
 446
 447         strlcpy(bufs[bufno].str, naddr_ntoa(addr), sizeof(bufs[bufno].str));
 448         s = bufs[bufno].str;
 449         l = sizeof(bufs[bufno].str);
 450         bufno = (bufno+1) % NUM_BUFS;
 451
 452         if (force == 1 || (force == 0 && mask != std_mask(addr))) {
 453                 sp = &s[strlen(s)];
 454
 455                 dmask = mask & -mask;
 456                 if (mask + dmask == 0) {
 457                         for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
 458                                 continue;
 459                         (void)snprintf(sp, s + l - sp, "/%d", 32-i);
 460
 461                 } else {
 462                         (void)snprintf(sp, s + l - sp, " (mask %#x)",
 463                             (u_int)mask);
 464                 }
 465         }
 466
 467         return s;
 468 #undef NUM_BUFS
 469 }
 470
 471
 472 /* display a bit-field
 473  */
 474 struct bits {
 475         u_int   bits_mask;
 476         u_int   bits_clear;
 477         const char *bits_name;
 478 };
 479
 480 static const struct bits if_bits[] = {
 481         { IFF_LOOPBACK,         0,              "LOOPBACK" },
 482         { IFF_POINTOPOINT,      0,              "PT-TO-PT" },
 483         { 0,                    0,              0}
 484 };
 485
 486 static const struct bits is_bits[] = {
 487         { IS_ALIAS,             0,              "ALIAS" },
 488         { IS_SUBNET,            0,              "" },
 489         { IS_REMOTE,            (IS_NO_RDISC
 490                                  | IS_BCAST_RDISC), "REMOTE" },
 491         { IS_PASSIVE,           (IS_NO_RDISC
 492                                  | IS_NO_RIP
 493                                  | IS_NO_SUPER_AG
 494                                  | IS_PM_RDISC
 495                                  | IS_NO_AG),   "PASSIVE" },
 496         { IS_EXTERNAL,          0,              "EXTERNAL" },
 497         { IS_CHECKED,           0,              "" },
 498         { IS_ALL_HOSTS,         0,              "" },
 499         { IS_ALL_ROUTERS,       0,              "" },
 500         { IS_DISTRUST,          0,              "DISTRUST" },
 501         { IS_BROKE,             IS_SICK,        "BROKEN" },
 502         { IS_SICK,              0,              "SICK" },
 503         { IS_DUP,               0,              "DUPLICATE" },
 504         { IS_REDIRECT_OK,       0,              "REDIRECT_OK" },
 505         { IS_NEED_NET_SYN,      0,              "" },
 506         { IS_NO_AG,             IS_NO_SUPER_AG, "NO_AG" },
 507         { IS_NO_SUPER_AG,       0,              "NO_SUPER_AG" },
 508         { (IS_NO_RIPV1_IN
 509            | IS_NO_RIPV2_IN
 510            | IS_NO_RIPV1_OUT
 511            | IS_NO_RIPV2_OUT),  0,              "NO_RIP" },
 512         { (IS_NO_RIPV1_IN
 513            | IS_NO_RIPV1_OUT),  0,              "RIPV2" },
 514         { IS_NO_RIPV1_IN,       0,              "NO_RIPV1_IN" },
 515         { IS_NO_RIPV2_IN,       0,              "NO_RIPV2_IN" },
 516         { IS_NO_RIPV1_OUT,      0,              "NO_RIPV1_OUT" },
 517         { IS_NO_RIPV2_OUT,      0,              "NO_RIPV2_OUT" },
 518         { (IS_NO_ADV_IN
 519            | IS_NO_SOL_OUT
 520            | IS_NO_ADV_OUT),    IS_BCAST_RDISC, "NO_RDISC" },
 521         { IS_NO_SOL_OUT,        0,              "NO_SOLICIT" },
 522         { IS_SOL_OUT,           0,              "SEND_SOLICIT" },
 523         { IS_NO_ADV_OUT,        IS_BCAST_RDISC, "NO_RDISC_ADV" },
 524         { IS_ADV_OUT,           0,              "RDISC_ADV" },
 525         { IS_BCAST_RDISC,       0,              "BCAST_RDISC" },
 526         { IS_PM_RDISC,          0,              "" },
 527         { 0,                    0,              "%#x"}
 528 };
 529
 530 static const struct bits rs_bits[] = {
 531         { RS_IF,                0,              "IF" },
 532         { RS_NET_INT,           RS_NET_SYN,     "NET_INT" },
 533         { RS_NET_SYN,           0,              "NET_SYN" },
 534         { RS_SUBNET,            0,              "" },
 535         { RS_LOCAL,             0,              "LOCAL" },
 536         { RS_MHOME,             0,              "MHOME" },
 537         { RS_STATIC,            0,              "STATIC" },
 538         { RS_RDISC,             0,              "RDISC" },
 539         { 0,                    0,              "%#x"}
 540 };
 541
 542
 543 static void
 544 trace_bits(const struct bits *tbl,
 545            u_int field,
 546            int force)
 547 {
 548         u_int b;
 549         char c;
 550
 551         if (force) {
 552                 (void)putc('<', ftrace);
 553                 c = 0;
 554         } else {
 555                 c = '<';
 556         }
 557
 558         while (field != 0
 559                && (b = tbl->bits_mask) != 0) {
 560                 if ((b & field) == b) {
 561                         if (tbl->bits_name[0] != '\0') {
 562                                 if (c)
 563                                         (void)putc(c, ftrace);
 564                                 (void)fprintf(ftrace, "%s", tbl->bits_name);
 565                                 c = '|';
 566                         }
 567                         if (0 == (field &= ~(b | tbl->bits_clear)))
 568                                 break;
 569                 }
 570                 tbl++;
 571         }
 572         if (field != 0 && tbl->bits_name != NULL) {
 573                 if (c)
 574                         (void)putc(c, ftrace);
 575                 (void)fprintf(ftrace, tbl->bits_name, field);
 576                 c = '|';
 577         }
 578
 579         if (c != '<' || force)
 580                 (void)fputs("> ", ftrace);
 581 }
 582
 583
 584 char *
 585 rtname(naddr dst,
 586        naddr mask,
 587        naddr gate)
 588 {
 589         static char buf[3*4+3+1+2+3     /* "xxx.xxx.xxx.xxx/xx-->" */
 590                         +3*4+3+1];      /* "xxx.xxx.xxx.xxx" */
 591         int i;
 592
 593         i = sprintf(buf, "%-16s-->", addrname(dst, mask, 0));
 594         (void)sprintf(&buf[i], "%-*s", 15+20-MAX(20,i), naddr_ntoa(gate));
 595         return buf;
 596 }
 597
 598
 599 static void
 600 print_rts(struct rt_spare *rts,
 601           int force_metric,             /* -1=suppress, 0=default */
 602           int force_ifp,                /* -1=suppress, 0=default */
 603           int force_router,             /* -1=suppress, 0=default, 1=display */
 604           int force_tag,                /* -1=suppress, 0=default, 1=display */
 605           int force_time)               /* 0=suppress, 1=display */
 606 {
 607         int i;
 608
 609
 610         if (force_metric >= 0)
 611                 (void)fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
 612         if (force_ifp >= 0)
 613                 (void)fprintf(ftrace, "%s ", (rts->rts_ifp == NULL ?
 614                                               "if?" : rts->rts_ifp->int_name));
 615         if (force_router > 0
 616             || (force_router == 0 && rts->rts_router != rts->rts_gate))
 617                 (void)fprintf(ftrace, "router=%s ",
 618                               naddr_ntoa(rts->rts_router));
 619         if (force_time > 0)
 620                 (void)fprintf(ftrace, "%s ", ts(rts->rts_time));
 621         if (force_tag > 0
 622             || (force_tag == 0 && rts->rts_tag != 0))
 623                 (void)fprintf(ftrace, "tag=%#x ", ntohs(rts->rts_tag));
 624         if (rts->rts_de_ag != 0) {
 625                 for (i = 1; (u_int)(1 << i) <= rts->rts_de_ag; i++)
 626                         continue;
 627                 (void)fprintf(ftrace, "de_ag=%d ", i);
 628         }
 629
 630 }
 631
 632
 633 void
 634 trace_if(const char *act,
 635          struct interface *ifp)
 636 {
 637         if (!TRACEACTIONS || ftrace == NULL)
 638                 return;
 639
 640         lastlog();
 641         (void)fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
 642         (void)fprintf(ftrace, "%-15s-->%-15s ",
 643                       naddr_ntoa(ifp->int_addr),
 644                       addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
 645                                 ? ifp->int_dstaddr
 646                                 : htonl(ifp->int_net)),
 647                                ifp->int_mask, 1));
 648         if (ifp->int_metric != 0)
 649                 (void)fprintf(ftrace, "metric=%d ", ifp->int_metric);
 650         if (ifp->int_adj_inmetric != 0)
 651                 (void)fprintf(ftrace, "adj_inmetric=%u ",
 652                               ifp->int_adj_inmetric);
 653         if (ifp->int_adj_outmetric != 0)
 654                 (void)fprintf(ftrace, "adj_outmetric=%u ",
 655                               ifp->int_adj_outmetric);
 656         if (!IS_RIP_OUT_OFF(ifp->int_state)
 657             && ifp->int_d_metric != 0)
 658                 (void)fprintf(ftrace, "fake_default=%u ", ifp->int_d_metric);
 659         trace_bits(if_bits, ifp->int_if_flags, 0);
 660         trace_bits(is_bits, ifp->int_state, 0);
 661         (void)fputc('\n',ftrace);
 662 }
 663
 664
 665 void
 666 trace_upslot(struct rt_entry *rt,
 667              struct rt_spare *rts,
 668              struct rt_spare *new)
 669 {
 670         if (!TRACEACTIONS || ftrace == NULL)
 671                 return;
 672
 673         if (rts->rts_gate == new->rts_gate
 674             && rts->rts_router == new->rts_router
 675             && rts->rts_metric == new->rts_metric
 676             && rts->rts_tag == new->rts_tag
 677             && rts->rts_de_ag == new->rts_de_ag)
 678                 return;
 679
 680         lastlog();
 681         if (new->rts_gate == 0) {
 682                 (void)fprintf(ftrace, "Del #%d %-35s ",
 683                               (int)(rts - rt->rt_spares),
 684                               rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 685                 print_rts(rts, 0,0,0,0,
 686                           (rts != rt->rt_spares
 687                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 688
 689         } else if (rts->rts_gate != RIP_DEFAULT) {
 690                 (void)fprintf(ftrace, "Chg #%d %-35s ",
 691                               (int)(rts - rt->rt_spares),
 692                               rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 693                 print_rts(rts, 0,0,
 694                           rts->rts_gate != new->rts_gate,
 695                           rts->rts_tag != new->rts_tag,
 696                           rts != rt->rt_spares || AGE_RT(rt->rt_state,
 697                                                         rt->rt_ifp));
 698
 699                 (void)fprintf(ftrace, "\n       %19s%-16s ", "",
 700                               (new->rts_gate != rts->rts_gate
 701                                ? naddr_ntoa(new->rts_gate) : ""));
 702                 print_rts(new,
 703                           -(new->rts_metric == rts->rts_metric),
 704                           -(new->rts_ifp == rts->rts_ifp),
 705                           0,
 706                           rts->rts_tag != new->rts_tag,
 707                           (new->rts_time != rts->rts_time
 708                            && (rts != rt->rt_spares
 709                                || AGE_RT(rt->rt_state, new->rts_ifp))));
 710
 711         } else {
 712                 (void)fprintf(ftrace, "Add #%d %-35s ",
 713                               (int)(rts - rt->rt_spares),
 714                               rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
 715                 print_rts(new, 0,0,0,0,
 716                           (rts != rt->rt_spares
 717                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 718         }
 719         (void)fputc('\n',ftrace);
 720 }
 721
 722
 723 /* miscellaneous message checked by the caller
 724  */
 725 void
 726 trace_misc(const char *p, ...)
 727 {
 728         va_list args;
 729
 730         if (ftrace == NULL)
 731                 return;
 732
 733         lastlog();
 734         va_start(args, p);
 735         vfprintf(ftrace, p, args);
 736         va_end(args);
 737         (void)fputc('\n',ftrace);
 738 }
 739
 740
 741 /* display a message if tracing actions
 742  */
 743 void
 744 trace_act(const char *p, ...)
 745 {
 746         va_list args;
 747
 748         if (!TRACEACTIONS || ftrace == NULL)
 749                 return;
 750
 751         lastlog();
 752         va_start(args, p);
 753         vfprintf(ftrace, p, args);
 754         va_end(args);
 755         (void)fputc('\n',ftrace);
 756 }
 757
 758
 759 /* display a message if tracing packets
 760  */
 761 void
 762 trace_pkt(const char *p, ...)
 763 {
 764         va_list args;
 765
 766         if (!TRACEPACKETS || ftrace == NULL)
 767                 return;
 768
 769         lastlog();
 770         va_start(args, p);
 771         vfprintf(ftrace, p, args);
 772         va_end(args);
 773         (void)fputc('\n',ftrace);
 774 }
 775
 776
 777 void
 778 trace_change(struct rt_entry *rt,
 779              u_int      state,
 780              struct     rt_spare *new,
 781              const char *label)
 782 {
 783         if (ftrace == NULL)
 784                 return;
 785
 786         if (rt->rt_metric == new->rts_metric
 787             && rt->rt_gate == new->rts_gate
 788             && rt->rt_router == new->rts_router
 789             && rt->rt_state == state
 790             && rt->rt_tag == new->rts_tag
 791             && rt->rt_de_ag == new->rts_de_ag)
 792                 return;
 793
 794         lastlog();
 795         (void)fprintf(ftrace, "%s %-35s ",
 796                       label,
 797                       rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 798         print_rts(rt->rt_spares,
 799                   0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
 800         trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
 801
 802         (void)fprintf(ftrace, "\n%*s %19s%-16s ",
 803                       (int)strlen(label), "", "",
 804                       (rt->rt_gate != new->rts_gate
 805                        ? naddr_ntoa(new->rts_gate) : ""));
 806         print_rts(new,
 807                   -(new->rts_metric == rt->rt_metric),
 808                   -(new->rts_ifp == rt->rt_ifp),
 809                   0,
 810                   rt->rt_tag != new->rts_tag,
 811                   (rt->rt_time != new->rts_time
 812                    && AGE_RT(rt->rt_state,new->rts_ifp)));
 813         if (rt->rt_state != state)
 814                 trace_bits(rs_bits, state, 1);
 815         (void)fputc('\n',ftrace);
 816 }
 817
 818
 819 void
 820 trace_add_del(const char * action, struct rt_entry *rt)
 821 {
 822         if (ftrace == NULL)
 823                 return;
 824
 825         lastlog();
 826         (void)fprintf(ftrace, "%s    %-35s ",
 827                       action,
 828                       rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 829         print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
 830         trace_bits(rs_bits, rt->rt_state, 0);
 831         (void)fputc('\n',ftrace);
 832 }
 833
 834
 835 /* ARGSUSED */
 836 static int
 837 walk_trace(struct radix_node *rn,
 838            struct walkarg *w UNUSED)
 839 {
 840 #define RT ((struct rt_entry *)rn)
 841         struct rt_spare *rts;
 842         int i;
 843
 844         (void)fprintf(ftrace, "  %-35s ",
 845                       rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
 846         print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp));
 847         trace_bits(rs_bits, RT->rt_state, 0);
 848         if (RT->rt_poison_time >= now_garbage
 849             && RT->rt_poison_metric < RT->rt_metric)
 850                 (void)fprintf(ftrace, "pm=%d@%s",
 851                               RT->rt_poison_metric, ts(RT->rt_poison_time));
 852
 853         rts = &RT->rt_spares[1];
 854         for (i = 1; i < NUM_SPARES; i++, rts++) {
 855                 if (rts->rts_gate != RIP_DEFAULT) {
 856                         (void)fprintf(ftrace,"\n    #%d%15s%-16s ",
 857                                       i, "", naddr_ntoa(rts->rts_gate));
 858                         print_rts(rts, 0,0,0,0,1);
 859                 }
 860         }
 861         (void)fputc('\n',ftrace);
 862
 863         return 0;
 864 }
 865
 866
 867 static void
 868 trace_dump(void)
 869 {
 870         struct interface *ifp;
 871
 872         if (ftrace == NULL)
 873                 return;
 874         lastlog();
 875
 876         (void)fputs("current daemon state:\n", ftrace);
 877         LIST_FOREACH(ifp, &ifnet, int_list)
 878                 trace_if("", ifp);
 879         (void)rn_walktree(rhead, walk_trace, 0);
 880 }
 881
 882
 883 void
 884 trace_rip(const char *dir1, const char *dir2,
 885           struct sockaddr_in *who,
 886           struct interface *ifp,
 887           struct rip *msg,
 888           int size)                     /* total size of message */
 889 {
 890         struct netinfo *n, *lim;
 891 #       define NA ((struct netauth*)n)
 892         int i, seen_route;
 893
 894         if (!TRACEPACKETS || ftrace == NULL)
 895                 return;
 896
 897         lastlog();
 898         if (msg->rip_cmd >= RIPCMD_MAX
 899             || msg->rip_vers == 0) {
 900                 (void)fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
 901                               " %s.%d size=%d\n",
 902                               dir1, msg->rip_vers, msg->rip_cmd, dir2,
 903                               naddr_ntoa(who->sin_addr.s_addr),
 904                               ntohs(who->sin_port),
 905                               size);
 906                 return;
 907         }
 908
 909         (void)fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
 910                       dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
 911                       naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
 912                       ifp ? " via " : "", ifp ? ifp->int_name : "");
 913         if (!TRACECONTENTS)
 914                 return;
 915
 916         seen_route = 0;
 917         switch (msg->rip_cmd) {
 918         case RIPCMD_REQUEST:
 919         case RIPCMD_RESPONSE:
 920                 n = msg->rip_nets;
 921                 lim = (struct netinfo *)((char*)msg + size);
 922                 for (; n < lim; n++) {
 923                         if (!seen_route
 924                             && n->n_family == RIP_AF_UNSPEC
 925                             && ntohl(n->n_metric) == HOPCNT_INFINITY
 926                             && msg->rip_cmd == RIPCMD_REQUEST
 927                             && (n+1 == lim
 928                                 || (n+2 == lim
 929                                     && (n+1)->n_family == RIP_AF_AUTH))) {
 930                                 (void)fputs("\tQUERY ", ftrace);
 931                                 if (n->n_dst != 0)
 932                                         (void)fprintf(ftrace, "%s ",
 933                                                       naddr_ntoa(n->n_dst));
 934                                 if (n->n_mask != 0)
 935                                         (void)fprintf(ftrace, "mask=%#x ",
 936                                                       (u_int)ntohl(n->n_mask));
 937                                 if (n->n_nhop != 0)
 938                                         (void)fprintf(ftrace, "nhop=%s ",
 939                                                       naddr_ntoa(n->n_nhop));
 940                                 if (n->n_tag != 0)
 941                                         (void)fprintf(ftrace, "tag=%#x ",
 942                                                       ntohs(n->n_tag));
 943                                 (void)fputc('\n',ftrace);
 944                                 continue;
 945                         }
 946
 947                         if (n->n_family == RIP_AF_AUTH) {
 948                                 if (NA->a_type == RIP_AUTH_PW
 949                                     && n == msg->rip_nets) {
 950                                         (void)fprintf(ftrace, "\tPassword"
 951                                                       " Authentication:"
 952                                                       " \"%s\"\n",
 953                                                       qstring(NA->au.au_pw,
 954                                                           RIP_AUTH_PW_LEN));
 955                                         continue;
 956                                 }
 957
 958                                 if (NA->a_type == RIP_AUTH_MD5
 959                                     && n == msg->rip_nets) {
 960                                         (void)fprintf(ftrace,
 961                                                       "\tMD5 Auth"
 962                                                       " pkt_len=%d KeyID=%u"
 963                                                       " auth_len=%d"
 964                                                       " seqno=%#x"
 965                                                       " rsvd=%#x,%#x\n",
 966                                             ntohs(NA->au.a_md5.md5_pkt_len),
 967                                             NA->au.a_md5.md5_keyid,
 968                                             NA->au.a_md5.md5_auth_len,
 969                                             (int)ntohl(NA->au.a_md5.md5_seqno),
 970                                             (int)ntohs(NA->au.a_md5.rsvd[0]),
 971                                             (int)ntohs(NA->au.a_md5.rsvd[1]));
 972                                         continue;
 973                                 }
 974                                 (void)fprintf(ftrace,
 975                                               "\tAuthentication type %d: ",
 976                                               ntohs(NA->a_type));
 977                                 for (i = 0;
 978                                      i < (int)sizeof(NA->au.au_pw);
 979                                      i++)
 980                                         (void)fprintf(ftrace, "%02x ",
 981                                                       NA->au.au_pw[i]);
 982                                 (void)fputc('\n',ftrace);
 983                                 continue;
 984                         }
 985
 986                         seen_route = 1;
 987                         if (n->n_family != RIP_AF_INET) {
 988                                 (void)fprintf(ftrace,
 989                                               "\t(af %d) %-18s mask=%#x ",
 990                                               ntohs(n->n_family),
 991                                               naddr_ntoa(n->n_dst),
 992                                               (u_int)ntohl(n->n_mask));
 993                         } else if (msg->rip_vers == RIPv1) {
 994                                 (void)fprintf(ftrace, "\t%-18s ",
 995                                               addrname(n->n_dst,
 996                                                        ntohl(n->n_mask),
 997                                                        n->n_mask==0 ? 2 : 1));
 998                         } else {
 999                                 (void)fprintf(ftrace, "\t%-18s ",
1000                                               addrname(n->n_dst,
1001                                                        ntohl(n->n_mask),
1002                                                        n->n_mask==0 ? 2 : 0));
1003                         }
1004                         (void)fprintf(ftrace, "metric=%-2d ",
1005                                       (u_int)ntohl(n->n_metric));
1006                         if (n->n_nhop != 0)
1007                                 (void)fprintf(ftrace, " nhop=%s ",
1008                                               naddr_ntoa(n->n_nhop));
1009                         if (n->n_tag != 0)
1010                                 (void)fprintf(ftrace, "tag=%#x",
1011                                               ntohs(n->n_tag));
1012                         (void)fputc('\n',ftrace);
1013                 }
1014                 if (size != (char *)n - (char *)msg)
1015                         (void)fprintf(ftrace, "truncated record, len %d\n",
1016                                 size);
1017                 break;
1018
1019         case RIPCMD_TRACEON:
1020                 fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
1021                         msg->rip_tracefile);
1022                 break;
1023
1024         case RIPCMD_TRACEOFF:
1025                 break;
1026         }
1027 }