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 #define NRECORDS        50              /* size of circular trace buffer */
  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 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 == 0) ? "?" : 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 != 0) {
 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 != 0 && zap_stdio) {
 206                 if (ftrace != stdout)
 207                         fclose(ftrace);
 208                 ftrace = 0;
 209                 fd = open(_PATH_DEVNULL, O_RDWR);
 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 != 0) {
 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 != 0) {
 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 *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 *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 == 0 || filename[0] == '\0') {
 313                 filename = 0;
 314                 if (ftrace == 0) {
 315                         if (inittracename[0] == '\0') {
 316                                 msglog("missing trace file name");
 317                                 return;
 318                         }
 319                         fn = inittracename;
 320                 } else {
 321                         fn = 0;
 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 != 0) {
 357                 n_ftrace = fopen(fn, "a");
 358                 if (n_ftrace == 0) {
 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 == 0)
 381                 new_tracelevel++;
 382         tracelevel_msg(pat, dump != 0 ? dump : (filename != 0));
 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 == 0) {
 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         int i;
 445
 446         s = strcpy(bufs[bufno].str, naddr_ntoa(addr));
 447         bufno = (bufno+1) % NUM_BUFS;
 448
 449         if (force == 1 || (force == 0 && mask != std_mask(addr))) {
 450                 sp = &s[strlen(s)];
 451
 452                 dmask = mask & -mask;
 453                 if (mask + dmask == 0) {
 454                         for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
 455                                 continue;
 456                         (void)sprintf(sp, "/%d", 32-i);
 457
 458                 } else {
 459                         (void)sprintf(sp, " (mask %#x)", (u_int)mask);
 460                 }
 461         }
 462
 463         return s;
 464 #undef NUM_BUFS
 465 }
 466
 467
 468 /* display a bit-field
 469  */
 470 struct bits {
 471         u_int   bits_mask;
 472         u_int   bits_clear;
 473         const char *bits_name;
 474 };
 475
 476 static struct bits if_bits[] = {
 477         { IFF_LOOPBACK,         0,              "LOOPBACK" },
 478         { IFF_POINTOPOINT,      0,              "PT-TO-PT" },
 479         { 0,                    0,              0}
 480 };
 481
 482 static struct bits is_bits[] = {
 483         { IS_ALIAS,             0,              "ALIAS" },
 484         { IS_SUBNET,            0,              "" },
 485         { IS_REMOTE,            (IS_NO_RDISC
 486                                  | IS_BCAST_RDISC), "REMOTE" },
 487         { IS_PASSIVE,           (IS_NO_RDISC
 488                                  | IS_NO_RIP
 489                                  | IS_NO_SUPER_AG
 490                                  | IS_PM_RDISC
 491                                  | IS_NO_AG),   "PASSIVE" },
 492         { IS_EXTERNAL,          0,              "EXTERNAL" },
 493         { IS_CHECKED,           0,              "" },
 494         { IS_ALL_HOSTS,         0,              "" },
 495         { IS_ALL_ROUTERS,       0,              "" },
 496         { IS_DISTRUST,          0,              "DISTRUST" },
 497         { IS_BROKE,             IS_SICK,        "BROKEN" },
 498         { IS_SICK,              0,              "SICK" },
 499         { IS_DUP,               0,              "DUPLICATE" },
 500         { IS_REDIRECT_OK,       0,              "REDIRECT_OK" },
 501         { IS_NEED_NET_SYN,      0,              "" },
 502         { IS_NO_AG,             IS_NO_SUPER_AG, "NO_AG" },
 503         { IS_NO_SUPER_AG,       0,              "NO_SUPER_AG" },
 504         { (IS_NO_RIPV1_IN
 505            | IS_NO_RIPV2_IN
 506            | IS_NO_RIPV1_OUT
 507            | IS_NO_RIPV2_OUT),  0,              "NO_RIP" },
 508         { (IS_NO_RIPV1_IN
 509            | IS_NO_RIPV1_OUT),  0,              "RIPV2" },
 510         { IS_NO_RIPV1_IN,       0,              "NO_RIPV1_IN" },
 511         { IS_NO_RIPV2_IN,       0,              "NO_RIPV2_IN" },
 512         { IS_NO_RIPV1_OUT,      0,              "NO_RIPV1_OUT" },
 513         { IS_NO_RIPV2_OUT,      0,              "NO_RIPV2_OUT" },
 514         { (IS_NO_ADV_IN
 515            | IS_NO_SOL_OUT
 516            | IS_NO_ADV_OUT),    IS_BCAST_RDISC, "NO_RDISC" },
 517         { IS_NO_SOL_OUT,        0,              "NO_SOLICIT" },
 518         { IS_SOL_OUT,           0,              "SEND_SOLICIT" },
 519         { IS_NO_ADV_OUT,        IS_BCAST_RDISC, "NO_RDISC_ADV" },
 520         { IS_ADV_OUT,           0,              "RDISC_ADV" },
 521         { IS_BCAST_RDISC,       0,              "BCAST_RDISC" },
 522         { IS_PM_RDISC,          0,              "" },
 523         { 0,                    0,              "%#x"}
 524 };
 525
 526 static struct bits rs_bits[] = {
 527         { RS_IF,                0,              "IF" },
 528         { RS_NET_INT,           RS_NET_SYN,     "NET_INT" },
 529         { RS_NET_SYN,           0,              "NET_SYN" },
 530         { RS_SUBNET,            0,              "" },
 531         { RS_LOCAL,             0,              "LOCAL" },
 532         { RS_MHOME,             0,              "MHOME" },
 533         { RS_STATIC,            0,              "STATIC" },
 534         { RS_RDISC,             0,              "RDISC" },
 535         { 0,                    0,              "%#x"}
 536 };
 537
 538
 539 static void
 540 trace_bits(const struct bits *tbl,
 541            u_int field,
 542            int force)
 543 {
 544         u_int b;
 545         char c;
 546
 547         if (force) {
 548                 (void)putc('<', ftrace);
 549                 c = 0;
 550         } else {
 551                 c = '<';
 552         }
 553
 554         while (field != 0
 555                && (b = tbl->bits_mask) != 0) {
 556                 if ((b & field) == b) {
 557                         if (tbl->bits_name[0] != '\0') {
 558                                 if (c)
 559                                         (void)putc(c, ftrace);
 560                                 (void)fprintf(ftrace, "%s", tbl->bits_name);
 561                                 c = '|';
 562                         }
 563                         if (0 == (field &= ~(b | tbl->bits_clear)))
 564                                 break;
 565                 }
 566                 tbl++;
 567         }
 568         if (field != 0 && tbl->bits_name != 0) {
 569                 if (c)
 570                         (void)putc(c, ftrace);
 571                 (void)fprintf(ftrace, tbl->bits_name, field);
 572                 c = '|';
 573         }
 574
 575         if (c != '<' || force)
 576                 (void)fputs("> ", ftrace);
 577 }
 578
 579
 580 char *
 581 rtname(naddr dst,
 582        naddr mask,
 583        naddr gate)
 584 {
 585         static char buf[3*4+3+1+2+3     /* "xxx.xxx.xxx.xxx/xx-->" */
 586                         +3*4+3+1];      /* "xxx.xxx.xxx.xxx" */
 587         int i;
 588
 589         i = sprintf(buf, "%-16s-->", addrname(dst, mask, 0));
 590         (void)sprintf(&buf[i], "%-*s", 15+20-MAX(20,i), naddr_ntoa(gate));
 591         return buf;
 592 }
 593
 594
 595 static void
 596 print_rts(struct rt_spare *rts,
 597           int force_metric,             /* -1=suppress, 0=default */
 598           int force_ifp,                /* -1=suppress, 0=default */
 599           int force_router,             /* -1=suppress, 0=default, 1=display */
 600           int force_tag,                /* -1=suppress, 0=default, 1=display */
 601           int force_time)               /* 0=suppress, 1=display */
 602 {
 603         int i;
 604
 605
 606         if (force_metric >= 0)
 607                 (void)fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
 608         if (force_ifp >= 0)
 609                 (void)fprintf(ftrace, "%s ", (rts->rts_ifp == 0 ?
 610                                               "if?" : rts->rts_ifp->int_name));
 611         if (force_router > 0
 612             || (force_router == 0 && rts->rts_router != rts->rts_gate))
 613                 (void)fprintf(ftrace, "router=%s ",
 614                               naddr_ntoa(rts->rts_router));
 615         if (force_time > 0)
 616                 (void)fprintf(ftrace, "%s ", ts(rts->rts_time));
 617         if (force_tag > 0
 618             || (force_tag == 0 && rts->rts_tag != 0))
 619                 (void)fprintf(ftrace, "tag=%#x ", ntohs(rts->rts_tag));
 620         if (rts->rts_de_ag != 0) {
 621                 for (i = 1; (u_int)(1 << i) <= rts->rts_de_ag; i++)
 622                         continue;
 623                 (void)fprintf(ftrace, "de_ag=%d ", i);
 624         }
 625
 626 }
 627
 628
 629 void
 630 trace_if(const char *act,
 631          struct interface *ifp)
 632 {
 633         if (!TRACEACTIONS || ftrace == 0)
 634                 return;
 635
 636         lastlog();
 637         (void)fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
 638         (void)fprintf(ftrace, "%-15s-->%-15s ",
 639                       naddr_ntoa(ifp->int_addr),
 640                       addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
 641                                 ? ifp->int_dstaddr
 642                                 : htonl(ifp->int_net)),
 643                                ifp->int_mask, 1));
 644         if (ifp->int_metric != 0)
 645                 (void)fprintf(ftrace, "metric=%d ", ifp->int_metric);
 646         if (ifp->int_adj_inmetric != 0)
 647                 (void)fprintf(ftrace, "adj_inmetric=%u ",
 648                               ifp->int_adj_inmetric);
 649         if (ifp->int_adj_outmetric != 0)
 650                 (void)fprintf(ftrace, "adj_outmetric=%u ",
 651                               ifp->int_adj_outmetric);
 652         if (!IS_RIP_OUT_OFF(ifp->int_state)
 653             && ifp->int_d_metric != 0)
 654                 (void)fprintf(ftrace, "fake_default=%u ", ifp->int_d_metric);
 655         trace_bits(if_bits, ifp->int_if_flags, 0);
 656         trace_bits(is_bits, ifp->int_state, 0);
 657         (void)fputc('\n',ftrace);
 658 }
 659
 660
 661 void
 662 trace_upslot(struct rt_entry *rt,
 663              struct rt_spare *rts,
 664              struct rt_spare *new)
 665 {
 666         if (!TRACEACTIONS || ftrace == 0)
 667                 return;
 668
 669         if (rts->rts_gate == new->rts_gate
 670             && rts->rts_router == new->rts_router
 671             && rts->rts_metric == new->rts_metric
 672             && rts->rts_tag == new->rts_tag
 673             && rts->rts_de_ag == new->rts_de_ag)
 674                 return;
 675
 676         lastlog();
 677         if (new->rts_gate == 0) {
 678                 (void)fprintf(ftrace, "Del #%d %-35s ",
 679                               (int)(rts - rt->rt_spares),
 680                               rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 681                 print_rts(rts, 0,0,0,0,
 682                           (rts != rt->rt_spares
 683                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 684
 685         } else if (rts->rts_gate != RIP_DEFAULT) {
 686                 (void)fprintf(ftrace, "Chg #%d %-35s ",
 687                               (int)(rts - rt->rt_spares),
 688                               rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 689                 print_rts(rts, 0,0,
 690                           rts->rts_gate != new->rts_gate,
 691                           rts->rts_tag != new->rts_tag,
 692                           rts != rt->rt_spares || AGE_RT(rt->rt_state,
 693                                                         rt->rt_ifp));
 694
 695                 (void)fprintf(ftrace, "\n       %19s%-16s ", "",
 696                               (new->rts_gate != rts->rts_gate
 697                                ? naddr_ntoa(new->rts_gate) : ""));
 698                 print_rts(new,
 699                           -(new->rts_metric == rts->rts_metric),
 700                           -(new->rts_ifp == rts->rts_ifp),
 701                           0,
 702                           rts->rts_tag != new->rts_tag,
 703                           (new->rts_time != rts->rts_time
 704                            && (rts != rt->rt_spares
 705                                || AGE_RT(rt->rt_state, new->rts_ifp))));
 706
 707         } else {
 708                 (void)fprintf(ftrace, "Add #%d %-35s ",
 709                               (int)(rts - rt->rt_spares),
 710                               rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
 711                 print_rts(new, 0,0,0,0,
 712                           (rts != rt->rt_spares
 713                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 714         }
 715         (void)fputc('\n',ftrace);
 716 }
 717
 718
 719 /* miscellaneous message checked by the caller
 720  */
 721 void
 722 trace_misc(const char *p, ...)
 723 {
 724         va_list args;
 725
 726         if (ftrace == 0)
 727                 return;
 728
 729         lastlog();
 730         va_start(args, p);
 731         vfprintf(ftrace, p, args);
 732         va_end(args);
 733         (void)fputc('\n',ftrace);
 734 }
 735
 736
 737 /* display a message if tracing actions
 738  */
 739 void
 740 trace_act(const char *p, ...)
 741 {
 742         va_list args;
 743
 744         if (!TRACEACTIONS || ftrace == 0)
 745                 return;
 746
 747         lastlog();
 748         va_start(args, p);
 749         vfprintf(ftrace, p, args);
 750         va_end(args);
 751         (void)fputc('\n',ftrace);
 752 }
 753
 754
 755 /* display a message if tracing packets
 756  */
 757 void
 758 trace_pkt(const char *p, ...)
 759 {
 760         va_list args;
 761
 762         if (!TRACEPACKETS || ftrace == 0)
 763                 return;
 764
 765         lastlog();
 766         va_start(args, p);
 767         vfprintf(ftrace, p, args);
 768         va_end(args);
 769         (void)fputc('\n',ftrace);
 770 }
 771
 772
 773 void
 774 trace_change(struct rt_entry *rt,
 775              u_int      state,
 776              struct     rt_spare *new,
 777              const char *label)
 778 {
 779         if (ftrace == 0)
 780                 return;
 781
 782         if (rt->rt_metric == new->rts_metric
 783             && rt->rt_gate == new->rts_gate
 784             && rt->rt_router == new->rts_router
 785             && rt->rt_state == state
 786             && rt->rt_tag == new->rts_tag
 787             && rt->rt_de_ag == new->rts_de_ag)
 788                 return;
 789
 790         lastlog();
 791         (void)fprintf(ftrace, "%s %-35s ",
 792                       label,
 793                       rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 794         print_rts(rt->rt_spares,
 795                   0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
 796         trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
 797
 798         (void)fprintf(ftrace, "\n%*s %19s%-16s ",
 799                       (int)strlen(label), "", "",
 800                       (rt->rt_gate != new->rts_gate
 801                        ? naddr_ntoa(new->rts_gate) : ""));
 802         print_rts(new,
 803                   -(new->rts_metric == rt->rt_metric),
 804                   -(new->rts_ifp == rt->rt_ifp),
 805                   0,
 806                   rt->rt_tag != new->rts_tag,
 807                   (rt->rt_time != new->rts_time
 808                    && AGE_RT(rt->rt_state,new->rts_ifp)));
 809         if (rt->rt_state != state)
 810                 trace_bits(rs_bits, state, 1);
 811         (void)fputc('\n',ftrace);
 812 }
 813
 814
 815 void
 816 trace_add_del(const char * action, struct rt_entry *rt)
 817 {
 818         if (ftrace == 0)
 819                 return;
 820
 821         lastlog();
 822         (void)fprintf(ftrace, "%s    %-35s ",
 823                       action,
 824                       rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 825         print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
 826         trace_bits(rs_bits, rt->rt_state, 0);
 827         (void)fputc('\n',ftrace);
 828 }
 829
 830
 831 /* ARGSUSED */
 832 static int
 833 walk_trace(struct radix_node *rn,
 834            struct walkarg *w UNUSED)
 835 {
 836 #define RT ((struct rt_entry *)rn)
 837         struct rt_spare *rts;
 838         int i;
 839
 840         (void)fprintf(ftrace, "  %-35s ",
 841                       rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
 842         print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp));
 843         trace_bits(rs_bits, RT->rt_state, 0);
 844         if (RT->rt_poison_time >= now_garbage
 845             && RT->rt_poison_metric < RT->rt_metric)
 846                 (void)fprintf(ftrace, "pm=%d@%s",
 847                               RT->rt_poison_metric, ts(RT->rt_poison_time));
 848
 849         rts = &RT->rt_spares[1];
 850         for (i = 1; i < NUM_SPARES; i++, rts++) {
 851                 if (rts->rts_gate != RIP_DEFAULT) {
 852                         (void)fprintf(ftrace,"\n    #%d%15s%-16s ",
 853                                       i, "", naddr_ntoa(rts->rts_gate));
 854                         print_rts(rts, 0,0,0,0,1);
 855                 }
 856         }
 857         (void)fputc('\n',ftrace);
 858
 859         return 0;
 860 }
 861
 862
 863 static void
 864 trace_dump(void)
 865 {
 866         struct interface *ifp;
 867
 868         if (ftrace == 0)
 869                 return;
 870         lastlog();
 871
 872         (void)fputs("current daemon state:\n", ftrace);
 873         for (ifp = ifnet; ifp != 0; ifp = ifp->int_next)
 874                 trace_if("", ifp);
 875         (void)rn_walktree(rhead, walk_trace, 0);
 876 }
 877
 878
 879 void
 880 trace_rip(const char *dir1, const char *dir2,
 881           struct sockaddr_in *who,
 882           struct interface *ifp,
 883           struct rip *msg,
 884           int size)                     /* total size of message */
 885 {
 886         struct netinfo *n, *lim;
 887 #       define NA ((struct netauth*)n)
 888         int i, seen_route;
 889
 890         if (!TRACEPACKETS || ftrace == 0)
 891                 return;
 892
 893         lastlog();
 894         if (msg->rip_cmd >= RIPCMD_MAX
 895             || msg->rip_vers == 0) {
 896                 (void)fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
 897                               " %s.%d size=%d\n",
 898                               dir1, msg->rip_vers, msg->rip_cmd, dir2,
 899                               naddr_ntoa(who->sin_addr.s_addr),
 900                               ntohs(who->sin_port),
 901                               size);
 902                 return;
 903         }
 904
 905         (void)fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
 906                       dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
 907                       naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
 908                       ifp ? " via " : "", ifp ? ifp->int_name : "");
 909         if (!TRACECONTENTS)
 910                 return;
 911
 912         seen_route = 0;
 913         switch (msg->rip_cmd) {
 914         case RIPCMD_REQUEST:
 915         case RIPCMD_RESPONSE:
 916                 n = msg->rip_nets;
 917                 lim = (struct netinfo *)((char*)msg + size);
 918                 for (; n < lim; n++) {
 919                         if (!seen_route
 920                             && n->n_family == RIP_AF_UNSPEC
 921                             && ntohl(n->n_metric) == HOPCNT_INFINITY
 922                             && msg->rip_cmd == RIPCMD_REQUEST
 923                             && (n+1 == lim
 924                                 || (n+2 == lim
 925                                     && (n+1)->n_family == RIP_AF_AUTH))) {
 926                                 (void)fputs("\tQUERY ", ftrace);
 927                                 if (n->n_dst != 0)
 928                                         (void)fprintf(ftrace, "%s ",
 929                                                       naddr_ntoa(n->n_dst));
 930                                 if (n->n_mask != 0)
 931                                         (void)fprintf(ftrace, "mask=%#x ",
 932                                                       (u_int)ntohl(n->n_mask));
 933                                 if (n->n_nhop != 0)
 934                                         (void)fprintf(ftrace, "nhop=%s ",
 935                                                       naddr_ntoa(n->n_nhop));
 936                                 if (n->n_tag != 0)
 937                                         (void)fprintf(ftrace, "tag=%#x ",
 938                                                       ntohs(n->n_tag));
 939                                 (void)fputc('\n',ftrace);
 940                                 continue;
 941                         }
 942
 943                         if (n->n_family == RIP_AF_AUTH) {
 944                                 if (NA->a_type == RIP_AUTH_PW
 945                                     && n == msg->rip_nets) {
 946                                         (void)fprintf(ftrace, "\tPassword"
 947                                                       " Authentication:"
 948                                                       " \"%s\"\n",
 949                                                       qstring(NA->au.au_pw,
 950                                                           RIP_AUTH_PW_LEN));
 951                                         continue;
 952                                 }
 953
 954                                 if (NA->a_type == RIP_AUTH_MD5
 955                                     && n == msg->rip_nets) {
 956                                         (void)fprintf(ftrace,
 957                                                       "\tMD5 Auth"
 958                                                       " pkt_len=%d KeyID=%u"
 959                                                       " auth_len=%d"
 960                                                       " seqno=%#x"
 961                                                       " rsvd=%#x,%#x\n",
 962                                             ntohs(NA->au.a_md5.md5_pkt_len),
 963                                             NA->au.a_md5.md5_keyid,
 964                                             NA->au.a_md5.md5_auth_len,
 965                                             (int)ntohl(NA->au.a_md5.md5_seqno),
 966                                             (int)ntohs(NA->au.a_md5.rsvd[0]),
 967                                             (int)ntohs(NA->au.a_md5.rsvd[1]));
 968                                         continue;
 969                                 }
 970                                 (void)fprintf(ftrace,
 971                                               "\tAuthentication type %d: ",
 972                                               ntohs(NA->a_type));
 973                                 for (i = 0;
 974                                      i < (int)sizeof(NA->au.au_pw);
 975                                      i++)
 976                                         (void)fprintf(ftrace, "%02x ",
 977                                                       NA->au.au_pw[i]);
 978                                 (void)fputc('\n',ftrace);
 979                                 continue;
 980                         }
 981
 982                         seen_route = 1;
 983                         if (n->n_family != RIP_AF_INET) {
 984                                 (void)fprintf(ftrace,
 985                                               "\t(af %d) %-18s mask=%#x ",
 986                                               ntohs(n->n_family),
 987                                               naddr_ntoa(n->n_dst),
 988                                               (u_int)ntohl(n->n_mask));
 989                         } else if (msg->rip_vers == RIPv1) {
 990                                 (void)fprintf(ftrace, "\t%-18s ",
 991                                               addrname(n->n_dst,
 992                                                        ntohl(n->n_mask),
 993                                                        n->n_mask==0 ? 2 : 1));
 994                         } else {
 995                                 (void)fprintf(ftrace, "\t%-18s ",
 996                                               addrname(n->n_dst,
 997                                                        ntohl(n->n_mask),
 998                                                        n->n_mask==0 ? 2 : 0));
 999                         }
1000                         (void)fprintf(ftrace, "metric=%-2d ",
1001                                       (u_int)ntohl(n->n_metric));
1002                         if (n->n_nhop != 0)
1003                                 (void)fprintf(ftrace, " nhop=%s ",
1004                                               naddr_ntoa(n->n_nhop));
1005                         if (n->n_tag != 0)
1006                                 (void)fprintf(ftrace, "tag=%#x",
1007                                               ntohs(n->n_tag));
1008                         (void)fputc('\n',ftrace);
1009                 }
1010                 if (size != (char *)n - (char *)msg)
1011                         (void)fprintf(ftrace, "truncated record, len %d\n",
1012                                 size);
1013                 break;
1014
1015         case RIPCMD_TRACEON:
1016                 fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
1017                         msg->rip_tracefile);
1018                 break;
1019
1020         case RIPCMD_TRACEOFF:
1021                 break;
1022         }
1023 }