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 #ifdef __NetBSD__
  42 __RCSID("$NetBSD$");
  43 #elif defined(__FreeBSD__)
  44 __RCSID("$FreeBSD$");
  45 #else
  46 __RCSID("$Revision: 2.27 $");
  47 #ident "$Revision: 2.27 $"
  48 #endif
  49
  50
  51 #ifdef sgi
  52 /* use *stat64 for files on large file systems */
  53 #define stat    stat64
  54 #endif
  55
  56 int     tracelevel, new_tracelevel;
  57 FILE    *ftrace;                        /* output trace file */
  58 static const char *sigtrace_pat = "%s";
  59 static char savetracename[PATH_MAX];
  60 char    inittracename[PATH_MAX];
  61 static int file_trace;                  /* 1=tracing to file, not stdout */
  62
  63 static void trace_dump(void);
  64 static void tmsg(const char *, ...) PATTRIB(1,2);
  65
  66
  67 /* convert string to printable characters
  68  */
  69 static char *
  70 qstring(u_char *s, int len)
  71 {
  72         static char buf[8*20+1];
  73         char *p;
  74         u_char *s2, c;
  75
  76
  77         for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
  78                 c = *s++;
  79                 if (c == '\0') {
  80                         for (s2 = s+1; s2 < &s[len]; s2++) {
  81                                 if (*s2 != '\0')
  82                                         break;
  83                         }
  84                         if (s2 >= &s[len])
  85                             goto exit;
  86                 }
  87
  88                 if (c >= ' ' && c < 0x7f && c != '\\') {
  89                         *p++ = c;
  90                         continue;
  91                 }
  92                 *p++ = '\\';
  93                 switch (c) {
  94                 case '\\':
  95                         *p++ = '\\';
  96                         break;
  97                 case '\n':
  98                         *p++= 'n';
  99                         break;
 100                 case '\r':
 101                         *p++= 'r';
 102                         break;
 103                 case '\t':
 104                         *p++ = 't';
 105                         break;
 106                 case '\b':
 107                         *p++ = 'b';
 108                         break;
 109                 default:
 110                         p += sprintf(p,"%o",c);
 111                         break;
 112                 }
 113         }
 114 exit:
 115         *p = '\0';
 116         return buf;
 117 }
 118
 119
 120 /* convert IP address to a string, but not into a single buffer
 121  */
 122 char *
 123 naddr_ntoa(naddr a)
 124 {
 125 #define NUM_BUFS 4
 126         static int bufno;
 127         static struct {
 128             char    str[16];            /* xxx.xxx.xxx.xxx\0 */
 129         } bufs[NUM_BUFS];
 130         char *s;
 131         struct in_addr addr;
 132
 133         addr.s_addr = a;
 134         s = strcpy(bufs[bufno].str, inet_ntoa(addr));
 135         bufno = (bufno+1) % NUM_BUFS;
 136         return s;
 137 #undef NUM_BUFS
 138 }
 139
 140
 141 const char *
 142 saddr_ntoa(struct sockaddr *sa)
 143 {
 144         return (sa == NULL) ? "?" : naddr_ntoa(S_ADDR(sa));
 145 }
 146
 147
 148 static char *
 149 ts(time_t secs) {
 150         static char s[20];
 151
 152         secs += epoch.tv_sec;
 153 #ifdef sgi
 154         (void)cftime(s, "%T", &secs);
 155 #else
 156         memcpy(s, ctime(&secs)+11, 8);
 157         s[8] = '\0';
 158 #endif
 159         return s;
 160 }
 161
 162
 163 /* On each event, display a time stamp.
 164  * This assumes that 'now' is update once for each event, and
 165  * that at least now.tv_usec changes.
 166  */
 167 static struct timeval lastlog_time;
 168
 169 void
 170 lastlog(void)
 171 {
 172         if (lastlog_time.tv_sec != now.tv_sec
 173             || lastlog_time.tv_usec != now.tv_usec) {
 174                 (void)fprintf(ftrace, "-- %s --\n", ts(now.tv_sec));
 175                 lastlog_time = now;
 176         }
 177 }
 178
 179
 180 static void
 181 tmsg(const char *p, ...)
 182 {
 183         va_list args;
 184
 185         if (ftrace != NULL) {
 186                 lastlog();
 187                 va_start(args, p);
 188                 vfprintf(ftrace, p, args);
 189                 va_end(args);
 190                 (void)fputc('\n',ftrace);
 191                 fflush(ftrace);
 192         }
 193 }
 194
 195
 196 void
 197 trace_close(int zap_stdio)
 198 {
 199         int fd;
 200
 201
 202         fflush(stdout);
 203         fflush(stderr);
 204
 205         if (ftrace != NULL && zap_stdio) {
 206                 if (ftrace != stdout)
 207                         fclose(ftrace);
 208                 ftrace = NULL;
 209                 fd = open(_PATH_DEVNULL, O_RDWR);
 210                 if (fd < 0)
 211                         return;
 212                 if (isatty(STDIN_FILENO))
 213                         (void)dup2(fd, STDIN_FILENO);
 214                 if (isatty(STDOUT_FILENO))
 215                         (void)dup2(fd, STDOUT_FILENO);
 216                 if (isatty(STDERR_FILENO))
 217                         (void)dup2(fd, STDERR_FILENO);
 218                 (void)close(fd);
 219         }
 220         lastlog_time.tv_sec = 0;
 221 }
 222
 223
 224 void
 225 trace_flush(void)
 226 {
 227         if (ftrace != NULL) {
 228                 fflush(ftrace);
 229                 if (ferror(ftrace))
 230                         trace_off("tracing off: %s", strerror(ferror(ftrace)));
 231         }
 232 }
 233
 234
 235 void
 236 trace_off(const char *p, ...)
 237 {
 238         va_list args;
 239
 240
 241         if (ftrace != NULL) {
 242                 lastlog();
 243                 va_start(args, p);
 244                 vfprintf(ftrace, p, args);
 245                 va_end(args);
 246                 (void)fputc('\n',ftrace);
 247         }
 248         trace_close(file_trace);
 249
 250         new_tracelevel = tracelevel = 0;
 251 }
 252
 253
 254 /* log a change in tracing
 255  */
 256 void
 257 tracelevel_msg(const char *pat,
 258                int dump)                /* -1=no dump, 0=default, 1=force */
 259 {
 260         static const char * const off_msgs[MAX_TRACELEVEL] = {
 261                 "Tracing actions stopped",
 262                 "Tracing packets stopped",
 263                 "Tracing packet contents stopped",
 264                 "Tracing kernel changes stopped",
 265         };
 266         static const char * const on_msgs[MAX_TRACELEVEL] = {
 267                 "Tracing actions started",
 268                 "Tracing packets started",
 269                 "Tracing packet contents started",
 270                 "Tracing kernel changes started",
 271         };
 272         u_int old_tracelevel = tracelevel;
 273
 274
 275         if (new_tracelevel < 0)
 276                 new_tracelevel = 0;
 277         else if (new_tracelevel > MAX_TRACELEVEL)
 278                 new_tracelevel = MAX_TRACELEVEL;
 279
 280         if (new_tracelevel < tracelevel) {
 281                 if (new_tracelevel <= 0) {
 282                         trace_off(pat, off_msgs[0]);
 283                 } else do {
 284                         tmsg(pat, off_msgs[tracelevel]);
 285                 }
 286                 while (--tracelevel != new_tracelevel);
 287
 288         } else if (new_tracelevel > tracelevel) {
 289                 do {
 290                         tmsg(pat, on_msgs[tracelevel++]);
 291                 } while (tracelevel != new_tracelevel);
 292         }
 293
 294         if (dump > 0
 295             || (dump == 0 && old_tracelevel == 0 && tracelevel != 0))
 296                 trace_dump();
 297 }
 298
 299
 300 void
 301 set_tracefile(const char *filename,
 302               const char *pat,
 303               int dump)                 /* -1=no dump, 0=default, 1=force */
 304 {
 305         struct stat stbuf;
 306         FILE *n_ftrace;
 307         const char *fn;
 308
 309
 310         /* Allow a null filename to increase the level if the trace file
 311          * is already open or if coming from a trusted source, such as
 312          * a signal or the command line.
 313          */
 314         if (filename == NULL || filename[0] == '\0') {
 315                 filename = NULL;
 316                 if (ftrace == NULL) {
 317                         if (inittracename[0] == '\0') {
 318                                 msglog("missing trace file name");
 319                                 return;
 320                         }
 321                         fn = inittracename;
 322                 } else {
 323                         fn = NULL;
 324                 }
 325
 326         } else if (!strcmp(filename,"dump/../table")) {
 327                 trace_dump();
 328                 return;
 329
 330         } else {
 331                 /* Allow the file specified with "-T file" to be reopened,
 332                  * but require all other names specified over the net to
 333                  * match the official path.  The path can specify a directory
 334                  * in which the file is to be created.
 335                  */
 336                 if (strcmp(filename, inittracename)
 337 #ifdef _PATH_TRACE
 338                     && (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
 339                         || strstr(filename,"../")
 340                         || 0 > stat(_PATH_TRACE, &stbuf))
 341 #endif
 342                     ) {
 343                         msglog("wrong trace file \"%s\"", filename);
 344                         return;
 345                 }
 346
 347                 /* If the new tracefile exists, it must be a regular file.
 348                  */
 349                 if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
 350                         msglog("wrong type (%#x) of trace file \"%s\"",
 351                                stbuf.st_mode, filename);
 352                         return;
 353                 }
 354
 355                 fn = filename;
 356         }
 357
 358         if (fn != NULL) {
 359                 n_ftrace = fopen(fn, "a");
 360                 if (n_ftrace == NULL) {
 361                         msglog("failed to open trace file \"%s\" %s",
 362                                fn, strerror(errno));
 363                         if (fn == inittracename)
 364                                 inittracename[0] = '\0';
 365                         return;
 366                 }
 367
 368                 tmsg("switch to trace file %s", fn);
 369
 370                 trace_close(file_trace = 1);
 371
 372                 if (fn != savetracename)
 373                         strncpy(savetracename, fn, sizeof(savetracename)-1);
 374                 ftrace = n_ftrace;
 375
 376                 fflush(stdout);
 377                 fflush(stderr);
 378                 dup2(fileno(ftrace), STDOUT_FILENO);
 379                 dup2(fileno(ftrace), STDERR_FILENO);
 380         }
 381
 382         if (new_tracelevel == 0 || filename == NULL)
 383                 new_tracelevel++;
 384         tracelevel_msg(pat, dump != 0 ? dump : (filename != NULL));
 385 }
 386
 387
 388 /* ARGSUSED */
 389 void
 390 sigtrace_on(int s UNUSED)
 391 {
 392         new_tracelevel++;
 393         sigtrace_pat = "SIGUSR1: %s";
 394 }
 395
 396
 397 /* ARGSUSED */
 398 void
 399 sigtrace_off(int s UNUSED)
 400 {
 401         new_tracelevel--;
 402         sigtrace_pat = "SIGUSR2: %s";
 403 }
 404
 405
 406 /* Set tracing after a signal.
 407  */
 408 void
 409 set_tracelevel(void)
 410 {
 411         if (new_tracelevel == tracelevel)
 412                 return;
 413
 414         /* If tracing entirely off, and there was no tracefile specified
 415          * on the command line, then leave it off.
 416          */
 417         if (new_tracelevel > tracelevel && ftrace == NULL) {
 418                 if (savetracename[0] != '\0') {
 419                         set_tracefile(savetracename,sigtrace_pat,0);
 420                 } else if (inittracename[0] != '\0') {
 421                                 set_tracefile(inittracename,sigtrace_pat,0);
 422                 } else {
 423                         new_tracelevel = 0;
 424                         return;
 425                 }
 426         } else {
 427                 tracelevel_msg(sigtrace_pat, 0);
 428         }
 429 }
 430
 431
 432 /* display an address
 433  */
 434 char *
 435 addrname(naddr  addr,                   /* in network byte order */
 436          naddr  mask,
 437          int    force)                  /* 0=show mask if nonstandard, */
 438 {                                       /*      1=always show mask, 2=never */
 439 #define NUM_BUFS 4
 440         static int bufno;
 441         static struct {
 442             char    str[15+20];
 443         } bufs[NUM_BUFS];
 444         char *s, *sp;
 445         naddr dmask;
 446         size_t l;
 447         int i;
 448
 449         strlcpy(bufs[bufno].str, naddr_ntoa(addr), sizeof(bufs[bufno].str));
 450         s = bufs[bufno].str;
 451         l = sizeof(bufs[bufno].str);
 452         bufno = (bufno+1) % NUM_BUFS;
 453
 454         if (force == 1 || (force == 0 && mask != std_mask(addr))) {
 455                 sp = &s[strlen(s)];
 456
 457                 dmask = mask & -mask;
 458                 if (mask + dmask == 0) {
 459                         for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
 460                                 continue;
 461                         (void)snprintf(sp, s + l - sp, "/%d", 32-i);
 462
 463                 } else {
 464                         (void)snprintf(sp, s + l - sp, " (mask %#x)",
 465                             (u_int)mask);
 466                 }
 467         }
 468
 469         return s;
 470 #undef NUM_BUFS
 471 }
 472
 473
 474 /* display a bit-field
 475  */
 476 struct bits {
 477         u_int   bits_mask;
 478         u_int   bits_clear;
 479         const char *bits_name;
 480 };
 481
 482 static const struct bits if_bits[] = {
 483         { IFF_LOOPBACK,         0,              "LOOPBACK" },
 484         { IFF_POINTOPOINT,      0,              "PT-TO-PT" },
 485         { 0,                    0,              0}
 486 };
 487
 488 static const struct bits is_bits[] = {
 489         { IS_ALIAS,             0,              "ALIAS" },
 490         { IS_SUBNET,            0,              "" },
 491         { IS_REMOTE,            (IS_NO_RDISC
 492                                  | IS_BCAST_RDISC), "REMOTE" },
 493         { IS_PASSIVE,           (IS_NO_RDISC
 494                                  | IS_NO_RIP
 495                                  | IS_NO_SUPER_AG
 496                                  | IS_PM_RDISC
 497                                  | IS_NO_AG),   "PASSIVE" },
 498         { IS_EXTERNAL,          0,              "EXTERNAL" },
 499         { IS_CHECKED,           0,              "" },
 500         { IS_ALL_HOSTS,         0,              "" },
 501         { IS_ALL_ROUTERS,       0,              "" },
 502         { IS_DISTRUST,          0,              "DISTRUST" },
 503         { IS_BROKE,             IS_SICK,        "BROKEN" },
 504         { IS_SICK,              0,              "SICK" },
 505         { IS_DUP,               0,              "DUPLICATE" },
 506         { IS_REDIRECT_OK,       0,              "REDIRECT_OK" },
 507         { IS_NEED_NET_SYN,      0,              "" },
 508         { IS_NO_AG,             IS_NO_SUPER_AG, "NO_AG" },
 509         { IS_NO_SUPER_AG,       0,              "NO_SUPER_AG" },
 510         { (IS_NO_RIPV1_IN
 511            | IS_NO_RIPV2_IN
 512            | IS_NO_RIPV1_OUT
 513            | IS_NO_RIPV2_OUT),  0,              "NO_RIP" },
 514         { (IS_NO_RIPV1_IN
 515            | IS_NO_RIPV1_OUT),  0,              "RIPV2" },
 516         { IS_NO_RIPV1_IN,       0,              "NO_RIPV1_IN" },
 517         { IS_NO_RIPV2_IN,       0,              "NO_RIPV2_IN" },
 518         { IS_NO_RIPV1_OUT,      0,              "NO_RIPV1_OUT" },
 519         { IS_NO_RIPV2_OUT,      0,              "NO_RIPV2_OUT" },
 520         { (IS_NO_ADV_IN
 521            | IS_NO_SOL_OUT
 522            | IS_NO_ADV_OUT),    IS_BCAST_RDISC, "NO_RDISC" },
 523         { IS_NO_SOL_OUT,        0,              "NO_SOLICIT" },
 524         { IS_SOL_OUT,           0,              "SEND_SOLICIT" },
 525         { IS_NO_ADV_OUT,        IS_BCAST_RDISC, "NO_RDISC_ADV" },
 526         { IS_ADV_OUT,           0,              "RDISC_ADV" },
 527         { IS_BCAST_RDISC,       0,              "BCAST_RDISC" },
 528         { IS_PM_RDISC,          0,              "" },
 529         { 0,                    0,              "%#x"}
 530 };
 531
 532 static const struct bits rs_bits[] = {
 533         { RS_IF,                0,              "IF" },
 534         { RS_NET_INT,           RS_NET_SYN,     "NET_INT" },
 535         { RS_NET_SYN,           0,              "NET_SYN" },
 536         { RS_SUBNET,            0,              "" },
 537         { RS_LOCAL,             0,              "LOCAL" },
 538         { RS_MHOME,             0,              "MHOME" },
 539         { RS_STATIC,            0,              "STATIC" },
 540         { RS_RDISC,             0,              "RDISC" },
 541         { 0,                    0,              "%#x"}
 542 };
 543
 544
 545 static void
 546 trace_bits(const struct bits *tbl,
 547            u_int field,
 548            int force)
 549 {
 550         u_int b;
 551         char c;
 552
 553         if (force) {
 554                 (void)putc('<', ftrace);
 555                 c = 0;
 556         } else {
 557                 c = '<';
 558         }
 559
 560         while (field != 0
 561                && (b = tbl->bits_mask) != 0) {
 562                 if ((b & field) == b) {
 563                         if (tbl->bits_name[0] != '\0') {
 564                                 if (c)
 565                                         (void)putc(c, ftrace);
 566                                 (void)fprintf(ftrace, "%s", tbl->bits_name);
 567                                 c = '|';
 568                         }
 569                         if (0 == (field &= ~(b | tbl->bits_clear)))
 570                                 break;
 571                 }
 572                 tbl++;
 573         }
 574         if (field != 0 && tbl->bits_name != NULL) {
 575                 if (c)
 576                         (void)putc(c, ftrace);
 577                 (void)fprintf(ftrace, tbl->bits_name, field);
 578                 c = '|';
 579         }
 580
 581         if (c != '<' || force)
 582                 (void)fputs("> ", ftrace);
 583 }
 584
 585
 586 char *
 587 rtname(naddr dst,
 588        naddr mask,
 589        naddr gate)
 590 {
 591         static char buf[3*4+3+1+2+3     /* "xxx.xxx.xxx.xxx/xx-->" */
 592                         +3*4+3+1];      /* "xxx.xxx.xxx.xxx" */
 593         int i;
 594
 595         i = sprintf(buf, "%-16s-->", addrname(dst, mask, 0));
 596         (void)sprintf(&buf[i], "%-*s", 15+20-MAX(20,i), naddr_ntoa(gate));
 597         return buf;
 598 }
 599
 600
 601 static void
 602 print_rts(struct rt_spare *rts,
 603           int force_metric,             /* -1=suppress, 0=default */
 604           int force_ifp,                /* -1=suppress, 0=default */
 605           int force_router,             /* -1=suppress, 0=default, 1=display */
 606           int force_tag,                /* -1=suppress, 0=default, 1=display */
 607           int force_time)               /* 0=suppress, 1=display */
 608 {
 609         int i;
 610
 611
 612         if (force_metric >= 0)
 613                 (void)fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
 614         if (force_ifp >= 0)
 615                 (void)fprintf(ftrace, "%s ", (rts->rts_ifp == NULL ?
 616                                               "if?" : rts->rts_ifp->int_name));
 617         if (force_router > 0
 618             || (force_router == 0 && rts->rts_router != rts->rts_gate))
 619                 (void)fprintf(ftrace, "router=%s ",
 620                               naddr_ntoa(rts->rts_router));
 621         if (force_time > 0)
 622                 (void)fprintf(ftrace, "%s ", ts(rts->rts_time));
 623         if (force_tag > 0
 624             || (force_tag == 0 && rts->rts_tag != 0))
 625                 (void)fprintf(ftrace, "tag=%#x ", ntohs(rts->rts_tag));
 626         if (rts->rts_de_ag != 0) {
 627                 for (i = 1; (u_int)(1 << i) <= rts->rts_de_ag; i++)
 628                         continue;
 629                 (void)fprintf(ftrace, "de_ag=%d ", i);
 630         }
 631
 632 }
 633
 634
 635 void
 636 trace_if(const char *act,
 637          struct interface *ifp)
 638 {
 639         if (!TRACEACTIONS || ftrace == NULL)
 640                 return;
 641
 642         lastlog();
 643         (void)fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
 644         (void)fprintf(ftrace, "%-15s-->%-15s ",
 645                       naddr_ntoa(ifp->int_addr),
 646                       addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
 647                                 ? ifp->int_dstaddr
 648                                 : htonl(ifp->int_net)),
 649                                ifp->int_mask, 1));
 650         if (ifp->int_metric != 0)
 651                 (void)fprintf(ftrace, "metric=%d ", ifp->int_metric);
 652         if (ifp->int_adj_inmetric != 0)
 653                 (void)fprintf(ftrace, "adj_inmetric=%u ",
 654                               ifp->int_adj_inmetric);
 655         if (ifp->int_adj_outmetric != 0)
 656                 (void)fprintf(ftrace, "adj_outmetric=%u ",
 657                               ifp->int_adj_outmetric);
 658         if (!IS_RIP_OUT_OFF(ifp->int_state)
 659             && ifp->int_d_metric != 0)
 660                 (void)fprintf(ftrace, "fake_default=%u ", ifp->int_d_metric);
 661         trace_bits(if_bits, ifp->int_if_flags, 0);
 662         trace_bits(is_bits, ifp->int_state, 0);
 663         (void)fputc('\n',ftrace);
 664 }
 665
 666
 667 void
 668 trace_upslot(struct rt_entry *rt,
 669              struct rt_spare *rts,
 670              struct rt_spare *new)
 671 {
 672         if (!TRACEACTIONS || ftrace == NULL)
 673                 return;
 674
 675         if (rts->rts_gate == new->rts_gate
 676             && rts->rts_router == new->rts_router
 677             && rts->rts_metric == new->rts_metric
 678             && rts->rts_tag == new->rts_tag
 679             && rts->rts_de_ag == new->rts_de_ag)
 680                 return;
 681
 682         lastlog();
 683         if (new->rts_gate == 0) {
 684                 (void)fprintf(ftrace, "Del #%d %-35s ",
 685                               (int)(rts - rt->rt_spares),
 686                               rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 687                 print_rts(rts, 0,0,0,0,
 688                           (rts != rt->rt_spares
 689                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 690
 691         } else if (rts->rts_gate != RIP_DEFAULT) {
 692                 (void)fprintf(ftrace, "Chg #%d %-35s ",
 693                               (int)(rts - rt->rt_spares),
 694                               rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 695                 print_rts(rts, 0,0,
 696                           rts->rts_gate != new->rts_gate,
 697                           rts->rts_tag != new->rts_tag,
 698                           rts != rt->rt_spares || AGE_RT(rt->rt_state,
 699                                                         rt->rt_ifp));
 700
 701                 (void)fprintf(ftrace, "\n       %19s%-16s ", "",
 702                               (new->rts_gate != rts->rts_gate
 703                                ? naddr_ntoa(new->rts_gate) : ""));
 704                 print_rts(new,
 705                           -(new->rts_metric == rts->rts_metric),
 706                           -(new->rts_ifp == rts->rts_ifp),
 707                           0,
 708                           rts->rts_tag != new->rts_tag,
 709                           (new->rts_time != rts->rts_time
 710                            && (rts != rt->rt_spares
 711                                || AGE_RT(rt->rt_state, new->rts_ifp))));
 712
 713         } else {
 714                 (void)fprintf(ftrace, "Add #%d %-35s ",
 715                               (int)(rts - rt->rt_spares),
 716                               rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
 717                 print_rts(new, 0,0,0,0,
 718                           (rts != rt->rt_spares
 719                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 720         }
 721         (void)fputc('\n',ftrace);
 722 }
 723
 724
 725 /* miscellaneous message checked by the caller
 726  */
 727 void
 728 trace_misc(const char *p, ...)
 729 {
 730         va_list args;
 731
 732         if (ftrace == NULL)
 733                 return;
 734
 735         lastlog();
 736         va_start(args, p);
 737         vfprintf(ftrace, p, args);
 738         va_end(args);
 739         (void)fputc('\n',ftrace);
 740 }
 741
 742
 743 /* display a message if tracing actions
 744  */
 745 void
 746 trace_act(const char *p, ...)
 747 {
 748         va_list args;
 749
 750         if (!TRACEACTIONS || ftrace == NULL)
 751                 return;
 752
 753         lastlog();
 754         va_start(args, p);
 755         vfprintf(ftrace, p, args);
 756         va_end(args);
 757         (void)fputc('\n',ftrace);
 758 }
 759
 760
 761 /* display a message if tracing packets
 762  */
 763 void
 764 trace_pkt(const char *p, ...)
 765 {
 766         va_list args;
 767
 768         if (!TRACEPACKETS || ftrace == NULL)
 769                 return;
 770
 771         lastlog();
 772         va_start(args, p);
 773         vfprintf(ftrace, p, args);
 774         va_end(args);
 775         (void)fputc('\n',ftrace);
 776 }
 777
 778
 779 void
 780 trace_change(struct rt_entry *rt,
 781              u_int      state,
 782              struct     rt_spare *new,
 783              const char *label)
 784 {
 785         if (ftrace == NULL)
 786                 return;
 787
 788         if (rt->rt_metric == new->rts_metric
 789             && rt->rt_gate == new->rts_gate
 790             && rt->rt_router == new->rts_router
 791             && rt->rt_state == state
 792             && rt->rt_tag == new->rts_tag
 793             && rt->rt_de_ag == new->rts_de_ag)
 794                 return;
 795
 796         lastlog();
 797         (void)fprintf(ftrace, "%s %-35s ",
 798                       label,
 799                       rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 800         print_rts(rt->rt_spares,
 801                   0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
 802         trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
 803
 804         (void)fprintf(ftrace, "\n%*s %19s%-16s ",
 805                       (int)strlen(label), "", "",
 806                       (rt->rt_gate != new->rts_gate
 807                        ? naddr_ntoa(new->rts_gate) : ""));
 808         print_rts(new,
 809                   -(new->rts_metric == rt->rt_metric),
 810                   -(new->rts_ifp == rt->rt_ifp),
 811                   0,
 812                   rt->rt_tag != new->rts_tag,
 813                   (rt->rt_time != new->rts_time
 814                    && AGE_RT(rt->rt_state,new->rts_ifp)));
 815         if (rt->rt_state != state)
 816                 trace_bits(rs_bits, state, 1);
 817         (void)fputc('\n',ftrace);
 818 }
 819
 820
 821 void
 822 trace_add_del(const char * action, struct rt_entry *rt)
 823 {
 824         if (ftrace == NULL)
 825                 return;
 826
 827         lastlog();
 828         (void)fprintf(ftrace, "%s    %-35s ",
 829                       action,
 830                       rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 831         print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
 832         trace_bits(rs_bits, rt->rt_state, 0);
 833         (void)fputc('\n',ftrace);
 834 }
 835
 836
 837 /* ARGSUSED */
 838 static int
 839 walk_trace(struct radix_node *rn,
 840            struct walkarg *w UNUSED)
 841 {
 842 #define RT ((struct rt_entry *)rn)
 843         struct rt_spare *rts;
 844         int i;
 845
 846         (void)fprintf(ftrace, "  %-35s ",
 847                       rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
 848         print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp));
 849         trace_bits(rs_bits, RT->rt_state, 0);
 850         if (RT->rt_poison_time >= now_garbage
 851             && RT->rt_poison_metric < RT->rt_metric)
 852                 (void)fprintf(ftrace, "pm=%d@%s",
 853                               RT->rt_poison_metric, ts(RT->rt_poison_time));
 854
 855         rts = &RT->rt_spares[1];
 856         for (i = 1; i < NUM_SPARES; i++, rts++) {
 857                 if (rts->rts_gate != RIP_DEFAULT) {
 858                         (void)fprintf(ftrace,"\n    #%d%15s%-16s ",
 859                                       i, "", naddr_ntoa(rts->rts_gate));
 860                         print_rts(rts, 0,0,0,0,1);
 861                 }
 862         }
 863         (void)fputc('\n',ftrace);
 864
 865         return 0;
 866 }
 867
 868
 869 static void
 870 trace_dump(void)
 871 {
 872         struct interface *ifp;
 873
 874         if (ftrace == NULL)
 875                 return;
 876         lastlog();
 877
 878         (void)fputs("current daemon state:\n", ftrace);
 879         LIST_FOREACH(ifp, &ifnet, int_list)
 880                 trace_if("", ifp);
 881         (void)rn_walktree(rhead, walk_trace, 0);
 882 }
 883
 884
 885 void
 886 trace_rip(const char *dir1, const char *dir2,
 887           struct sockaddr_in *who,
 888           struct interface *ifp,
 889           struct rip *msg,
 890           int size)                     /* total size of message */
 891 {
 892         struct netinfo *n, *lim;
 893 #       define NA ((struct netauth*)n)
 894         int i, seen_route;
 895
 896         if (!TRACEPACKETS || ftrace == NULL)
 897                 return;
 898
 899         lastlog();
 900         if (msg->rip_cmd >= RIPCMD_MAX
 901             || msg->rip_vers == 0) {
 902                 (void)fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
 903                               " %s.%d size=%d\n",
 904                               dir1, msg->rip_vers, msg->rip_cmd, dir2,
 905                               naddr_ntoa(who->sin_addr.s_addr),
 906                               ntohs(who->sin_port),
 907                               size);
 908                 return;
 909         }
 910
 911         (void)fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
 912                       dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
 913                       naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
 914                       ifp ? " via " : "", ifp ? ifp->int_name : "");
 915         if (!TRACECONTENTS)
 916                 return;
 917
 918         seen_route = 0;
 919         switch (msg->rip_cmd) {
 920         case RIPCMD_REQUEST:
 921         case RIPCMD_RESPONSE:
 922                 n = msg->rip_nets;
 923                 lim = (struct netinfo *)((char*)msg + size);
 924                 for (; n < lim; n++) {
 925                         if (!seen_route
 926                             && n->n_family == RIP_AF_UNSPEC
 927                             && ntohl(n->n_metric) == HOPCNT_INFINITY
 928                             && msg->rip_cmd == RIPCMD_REQUEST
 929                             && (n+1 == lim
 930                                 || (n+2 == lim
 931                                     && (n+1)->n_family == RIP_AF_AUTH))) {
 932                                 (void)fputs("\tQUERY ", ftrace);
 933                                 if (n->n_dst != 0)
 934                                         (void)fprintf(ftrace, "%s ",
 935                                                       naddr_ntoa(n->n_dst));
 936                                 if (n->n_mask != 0)
 937                                         (void)fprintf(ftrace, "mask=%#x ",
 938                                                       (u_int)ntohl(n->n_mask));
 939                                 if (n->n_nhop != 0)
 940                                         (void)fprintf(ftrace, "nhop=%s ",
 941                                                       naddr_ntoa(n->n_nhop));
 942                                 if (n->n_tag != 0)
 943                                         (void)fprintf(ftrace, "tag=%#x ",
 944                                                       ntohs(n->n_tag));
 945                                 (void)fputc('\n',ftrace);
 946                                 continue;
 947                         }
 948
 949                         if (n->n_family == RIP_AF_AUTH) {
 950                                 if (NA->a_type == RIP_AUTH_PW
 951                                     && n == msg->rip_nets) {
 952                                         (void)fprintf(ftrace, "\tPassword"
 953                                                       " Authentication:"
 954                                                       " \"%s\"\n",
 955                                                       qstring(NA->au.au_pw,
 956                                                           RIP_AUTH_PW_LEN));
 957                                         continue;
 958                                 }
 959
 960                                 if (NA->a_type == RIP_AUTH_MD5
 961                                     && n == msg->rip_nets) {
 962                                         (void)fprintf(ftrace,
 963                                                       "\tMD5 Auth"
 964                                                       " pkt_len=%d KeyID=%u"
 965                                                       " auth_len=%d"
 966                                                       " seqno=%#x"
 967                                                       " rsvd=%#x,%#x\n",
 968                                             ntohs(NA->au.a_md5.md5_pkt_len),
 969                                             NA->au.a_md5.md5_keyid,
 970                                             NA->au.a_md5.md5_auth_len,
 971                                             (int)ntohl(NA->au.a_md5.md5_seqno),
 972                                             (int)ntohs(NA->au.a_md5.rsvd[0]),
 973                                             (int)ntohs(NA->au.a_md5.rsvd[1]));
 974                                         continue;
 975                                 }
 976                                 (void)fprintf(ftrace,
 977                                               "\tAuthentication type %d: ",
 978                                               ntohs(NA->a_type));
 979                                 for (i = 0;
 980                                      i < (int)sizeof(NA->au.au_pw);
 981                                      i++)
 982                                         (void)fprintf(ftrace, "%02x ",
 983                                                       NA->au.au_pw[i]);
 984                                 (void)fputc('\n',ftrace);
 985                                 continue;
 986                         }
 987
 988                         seen_route = 1;
 989                         if (n->n_family != RIP_AF_INET) {
 990                                 (void)fprintf(ftrace,
 991                                               "\t(af %d) %-18s mask=%#x ",
 992                                               ntohs(n->n_family),
 993                                               naddr_ntoa(n->n_dst),
 994                                               (u_int)ntohl(n->n_mask));
 995                         } else if (msg->rip_vers == RIPv1) {
 996                                 (void)fprintf(ftrace, "\t%-18s ",
 997                                               addrname(n->n_dst,
 998                                                        ntohl(n->n_mask),
 999                                                        n->n_mask==0 ? 2 : 1));
1000                         } else {
1001                                 (void)fprintf(ftrace, "\t%-18s ",
1002                                               addrname(n->n_dst,
1003                                                        ntohl(n->n_mask),
1004                                                        n->n_mask==0 ? 2 : 0));
1005                         }
1006                         (void)fprintf(ftrace, "metric=%-2d ",
1007                                       (u_int)ntohl(n->n_metric));
1008                         if (n->n_nhop != 0)
1009                                 (void)fprintf(ftrace, " nhop=%s ",
1010                                               naddr_ntoa(n->n_nhop));
1011                         if (n->n_tag != 0)
1012                                 (void)fprintf(ftrace, "tag=%#x",
1013                                               ntohs(n->n_tag));
1014                         (void)fputc('\n',ftrace);
1015                 }
1016                 if (size != (char *)n - (char *)msg)
1017                         (void)fprintf(ftrace, "truncated record, len %d\n",
1018                                 size);
1019                 break;
1020
1021         case RIPCMD_TRACEON:
1022                 fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
1023                         msg->rip_tracefile);
1024                 break;
1025
1026         case RIPCMD_TRACEOFF:
1027                 break;
1028         }
1029 }