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