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  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgment:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * $FreeBSD: src/sbin/routed/trace.c,v 1.5.2.1 2002/11/07 17:19:13 imp Exp $
  34  * $DragonFly: src/sbin/routed/trace.c,v 1.3 2004/12/18 21:43:40 swildner Exp $
  35  */
  36
  37 #define RIPCMDS
  38 #include "defs.h"
  39 #include "pathnames.h"
  40 #include <sys/stat.h>
  41 #include <sys/signal.h>
  42 #include <fcntl.h>
  43
  44 #if !defined(sgi) && !defined(__NetBSD__)
  45 static char sccsid[] __attribute__((unused)) = "@(#)trace.c     8.1 (Berkeley) 6/5/93";
  46 #elif defined(__NetBSD__)
  47 __RCSID("$NetBSD$");
  48 #endif
  49 #ident "$FreeBSD: src/sbin/routed/trace.c,v 1.5.2.1 2002/11/07 17:19:13 imp Exp $"
  50
  51
  52 #ifdef sgi
  53 /* use *stat64 for files on large filesystems */
  54 #define stat    stat64
  55 #endif
  56
  57 #define NRECORDS        50              /* size of circular trace buffer */
  58
  59 int     tracelevel, new_tracelevel;
  60 FILE    *ftrace;                /* output trace file */
  61 static const char *sigtrace_pat = "%s";
  62 static char savetracename[MAXPATHLEN+1];
  63 char    inittracename[MAXPATHLEN+1];
  64 int     file_trace;                     /* 1=tracing to file, not stdout */
  65
  66 static void trace_dump(void);
  67 static void tmsg(const char *, ...) PATTRIB(1,2);
  68
  69
  70 /* convert string to printable characters
  71  */
  72 static char *
  73 qstring(u_char *s, int len)
  74 {
  75         static char buf[8*20+1];
  76         char *p;
  77         u_char *s2, c;
  78
  79
  80         for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
  81                 c = *s++;
  82                 if (c == '\0') {
  83                         for (s2 = s+1; s2 < &s[len]; s2++) {
  84                                 if (*s2 != '\0')
  85                                         break;
  86                         }
  87                         if (s2 >= &s[len])
  88                             goto exit;
  89                 }
  90
  91                 if (c >= ' ' && c < 0x7f && c != '\\') {
  92                         *p++ = c;
  93                         continue;
  94                 }
  95                 *p++ = '\\';
  96                 switch (c) {
  97                 case '\\':
  98                         *p++ = '\\';
  99                         break;
 100                 case '\n':
 101                         *p++= 'n';
 102                         break;
 103                 case '\r':
 104                         *p++= 'r';
 105                         break;
 106                 case '\t':
 107                         *p++ = 't';
 108                         break;
 109                 case '\b':
 110                         *p++ = 'b';
 111                         break;
 112                 default:
 113                         p += sprintf(p,"%o",c);
 114                         break;
 115                 }
 116         }
 117 exit:
 118         *p = '\0';
 119         return buf;
 120 }
 121
 122
 123 /* convert IP address to a string, but not into a single buffer
 124  */
 125 char *
 126 naddr_ntoa(naddr a)
 127 {
 128 #define NUM_BUFS 4
 129         static int bufno;
 130         static struct {
 131             char    str[16];            /* xxx.xxx.xxx.xxx\0 */
 132         } bufs[NUM_BUFS];
 133         char *s;
 134         struct in_addr addr;
 135
 136         addr.s_addr = a;
 137         s = strcpy(bufs[bufno].str, inet_ntoa(addr));
 138         bufno = (bufno+1) % NUM_BUFS;
 139         return s;
 140 #undef NUM_BUFS
 141 }
 142
 143
 144 const char *
 145 saddr_ntoa(struct sockaddr *sa)
 146 {
 147         return (sa == 0) ? "?" : naddr_ntoa(S_ADDR(sa));
 148 }
 149
 150
 151 static char *
 152 ts(time_t secs) {
 153         static char s[20];
 154
 155         secs += epoch.tv_sec;
 156 #ifdef sgi
 157         cftime(s, "%T", &secs);
 158 #else
 159         memcpy(s, ctime(&secs)+11, 8);
 160         s[8] = '\0';
 161 #endif
 162         return s;
 163 }
 164
 165
 166 /* On each event, display a time stamp.
 167  * This assumes that 'now' is update once for each event, and
 168  * that at least now.tv_usec changes.
 169  */
 170 static struct timeval lastlog_time;
 171
 172 void
 173 lastlog(void)
 174 {
 175         if (lastlog_time.tv_sec != now.tv_sec
 176             || lastlog_time.tv_usec != now.tv_usec) {
 177                 fprintf(ftrace, "-- %s --\n", ts(now.tv_sec));
 178                 lastlog_time = now;
 179         }
 180 }
 181
 182
 183 static void
 184 tmsg(const char *p, ...)
 185 {
 186         va_list args;
 187
 188         if (ftrace != 0) {
 189                 lastlog();
 190                 va_start(args, p);
 191                 vfprintf(ftrace, p, args);
 192                 fputc('\n',ftrace);
 193                 fflush(ftrace);
 194         }
 195 }
 196
 197
 198 void
 199 trace_close(int zap_stdio)
 200 {
 201         int fd;
 202
 203
 204         fflush(stdout);
 205         fflush(stderr);
 206
 207         if (ftrace != 0 && zap_stdio) {
 208                 if (ftrace != stdout)
 209                         fclose(ftrace);
 210                 ftrace = 0;
 211                 fd = open(_PATH_DEVNULL, O_RDWR);
 212                 if (isatty(STDIN_FILENO))
 213                         dup2(fd, STDIN_FILENO);
 214                 if (isatty(STDOUT_FILENO))
 215                         dup2(fd, STDOUT_FILENO);
 216                 if (isatty(STDERR_FILENO))
 217                         dup2(fd, STDERR_FILENO);
 218                 close(fd);
 219         }
 220         lastlog_time.tv_sec = 0;
 221 }
 222
 223
 224 void
 225 trace_flush(void)
 226 {
 227         if (ftrace != 0) {
 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 != 0) {
 242                 lastlog();
 243                 va_start(args, p);
 244                 vfprintf(ftrace, p, args);
 245                 fputc('\n',ftrace);
 246         }
 247         trace_close(file_trace);
 248
 249         new_tracelevel = tracelevel = 0;
 250 }
 251
 252
 253 /* log a change in tracing
 254  */
 255 void
 256 tracelevel_msg(const char *pat,
 257                int dump)                /* -1=no dump, 0=default, 1=force */
 258 {
 259         static const char *off_msgs[MAX_TRACELEVEL] = {
 260                 "Tracing actions stopped",
 261                 "Tracing packets stopped",
 262                 "Tracing packet contents stopped",
 263                 "Tracing kernel changes stopped",
 264         };
 265         static const char *on_msgs[MAX_TRACELEVEL] = {
 266                 "Tracing actions started",
 267                 "Tracing packets started",
 268                 "Tracing packet contents started",
 269                 "Tracing kernel changes started",
 270         };
 271         u_int old_tracelevel = tracelevel;
 272
 273
 274         if (new_tracelevel < 0)
 275                 new_tracelevel = 0;
 276         else if (new_tracelevel > MAX_TRACELEVEL)
 277                 new_tracelevel = MAX_TRACELEVEL;
 278
 279         if (new_tracelevel < tracelevel) {
 280                 if (new_tracelevel <= 0) {
 281                         trace_off(pat, off_msgs[0]);
 282                 } else do {
 283                         tmsg(pat, off_msgs[tracelevel]);
 284                 }
 285                 while (--tracelevel != new_tracelevel);
 286
 287         } else if (new_tracelevel > tracelevel) {
 288                 do {
 289                         tmsg(pat, on_msgs[tracelevel++]);
 290                 } while (tracelevel != new_tracelevel);
 291         }
 292
 293         if (dump > 0
 294             || (dump == 0 && old_tracelevel == 0 && tracelevel != 0))
 295                 trace_dump();
 296 }
 297
 298
 299 void
 300 set_tracefile(const char *filename,
 301               const char *pat,
 302               int dump)                 /* -1=no dump, 0=default, 1=force */
 303 {
 304         struct stat stbuf;
 305         FILE *n_ftrace;
 306         const char *fn;
 307
 308
 309         /* Allow a null filename to increase the level if the trace file
 310          * is already open or if coming from a trusted source, such as
 311          * a signal or the command line.
 312          */
 313         if (filename == 0 || filename[0] == '\0') {
 314                 filename = 0;
 315                 if (ftrace == 0) {
 316                         if (inittracename[0] == '\0') {
 317                                 msglog("missing trace file name");
 318                                 return;
 319                         }
 320                         fn = inittracename;
 321                 } else {
 322                         fn = 0;
 323                 }
 324
 325         } else if (!strcmp(filename,"dump/../table")) {
 326                 trace_dump();
 327                 return;
 328
 329         } else {
 330                 /* Allow the file specified with "-T file" to be reopened,
 331                  * but require all other names specified over the net to
 332                  * match the official path.  The path can specify a directory
 333                  * in which the file is to be created.
 334                  */
 335                 if (strcmp(filename, inittracename)
 336 #ifdef _PATH_TRACE
 337                     && (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
 338                         || strstr(filename,"../")
 339                         || 0 > stat(_PATH_TRACE, &stbuf))
 340 #endif
 341                     ) {
 342                         msglog("wrong trace file \"%s\"", filename);
 343                         return;
 344                 }
 345
 346                 /* If the new tracefile exists, it must be a regular file.
 347                  */
 348                 if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
 349                         msglog("wrong type (%#x) of trace file \"%s\"",
 350                                stbuf.st_mode, filename);
 351                         return;
 352                 }
 353
 354                 fn = filename;
 355         }
 356
 357         if (fn != 0) {
 358                 n_ftrace = fopen(fn, "a");
 359                 if (n_ftrace == 0) {
 360                         msglog("failed to open trace file \"%s\" %s",
 361                                fn, strerror(errno));
 362                         if (fn == inittracename)
 363                                 inittracename[0] = '\0';
 364                         return;
 365                 }
 366
 367                 tmsg("switch to trace file %s", fn);
 368
 369                 trace_close(file_trace = 1);
 370
 371                 if (fn != savetracename)
 372                         strncpy(savetracename, fn, sizeof(savetracename)-1);
 373                 ftrace = n_ftrace;
 374
 375                 fflush(stdout);
 376                 fflush(stderr);
 377                 dup2(fileno(ftrace), STDOUT_FILENO);
 378                 dup2(fileno(ftrace), STDERR_FILENO);
 379         }
 380
 381         if (new_tracelevel == 0 || filename == 0)
 382                 new_tracelevel++;
 383         tracelevel_msg(pat, dump != 0 ? dump : (filename != 0));
 384 }
 385
 386
 387 /* ARGSUSED */
 388 void
 389 sigtrace_on(int s UNUSED)
 390 {
 391         new_tracelevel++;
 392         sigtrace_pat = "SIGUSR1: %s";
 393 }
 394
 395
 396 /* ARGSUSED */
 397 void
 398 sigtrace_off(int s UNUSED)
 399 {
 400         new_tracelevel--;
 401         sigtrace_pat = "SIGUSR2: %s";
 402 }
 403
 404
 405 /* Set tracing after a signal.
 406  */
 407 void
 408 set_tracelevel(void)
 409 {
 410         if (new_tracelevel == tracelevel)
 411                 return;
 412
 413         /* If tracing entirely off, and there was no tracefile specified
 414          * on the command line, then leave it off.
 415          */
 416         if (new_tracelevel > tracelevel && ftrace == 0) {
 417                 if (savetracename[0] != '\0') {
 418                         set_tracefile(savetracename,sigtrace_pat,0);
 419                 } else if (inittracename[0] != '\0') {
 420                                 set_tracefile(inittracename,sigtrace_pat,0);
 421                 } else {
 422                         new_tracelevel = 0;
 423                         return;
 424                 }
 425         } else {
 426                 tracelevel_msg(sigtrace_pat, 0);
 427         }
 428 }
 429
 430
 431 /* display an address
 432  */
 433 char *
 434 addrname(naddr  addr,                   /* in network byte order */
 435          naddr  mask,
 436          int    force)                  /* 0=show mask if nonstandard, */
 437 {                                       /*      1=always show mask, 2=never */
 438 #define NUM_BUFS 4
 439         static int bufno;
 440         static struct {
 441             char    str[15+20];
 442         } bufs[NUM_BUFS];
 443         char *s, *sp;
 444         naddr dmask;
 445         int i;
 446
 447         s = strcpy(bufs[bufno].str, naddr_ntoa(addr));
 448         bufno = (bufno+1) % NUM_BUFS;
 449
 450         if (force == 1 || (force == 0 && mask != std_mask(addr))) {
 451                 sp = &s[strlen(s)];
 452
 453                 dmask = mask & -mask;
 454                 if (mask + dmask == 0) {
 455                         for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
 456                                 continue;
 457                         sprintf(sp, "/%d", 32-i);
 458
 459                 } else {
 460                         sprintf(sp, " (mask %#x)", (u_int)mask);
 461                 }
 462         }
 463
 464         return s;
 465 #undef NUM_BUFS
 466 }
 467
 468
 469 /* display a bit-field
 470  */
 471 struct bits {
 472         u_int   bits_mask;
 473         u_int   bits_clear;
 474         const char *bits_name;
 475 };
 476
 477 static struct bits if_bits[] = {
 478         { IFF_LOOPBACK,         0,              "LOOPBACK" },
 479         { IFF_POINTOPOINT,      0,              "PT-TO-PT" },
 480         { 0,                    0,              0}
 481 };
 482
 483 static struct bits is_bits[] = {
 484         { IS_ALIAS,             0,              "ALIAS" },
 485         { IS_SUBNET,            0,              "" },
 486         { IS_REMOTE,            (IS_NO_RDISC
 487                                  | IS_BCAST_RDISC), "REMOTE" },
 488         { IS_PASSIVE,           (IS_NO_RDISC
 489                                  | IS_NO_RIP
 490                                  | IS_NO_SUPER_AG
 491                                  | IS_PM_RDISC
 492                                  | IS_NO_AG),   "PASSIVE" },
 493         { IS_EXTERNAL,          0,              "EXTERNAL" },
 494         { IS_CHECKED,           0,              "" },
 495         { IS_ALL_HOSTS,         0,              "" },
 496         { IS_ALL_ROUTERS,       0,              "" },
 497         { IS_DISTRUST,          0,              "DISTRUST" },
 498         { IS_BROKE,             IS_SICK,        "BROKEN" },
 499         { IS_SICK,              0,              "SICK" },
 500         { IS_DUP,               0,              "DUPLICATE" },
 501         { IS_REDIRECT_OK,       0,              "REDIRECT_OK" },
 502         { IS_NEED_NET_SYN,      0,              "" },
 503         { IS_NO_AG,             IS_NO_SUPER_AG, "NO_AG" },
 504         { IS_NO_SUPER_AG,       0,              "NO_SUPER_AG" },
 505         { (IS_NO_RIPV1_IN
 506            | IS_NO_RIPV2_IN
 507            | IS_NO_RIPV1_OUT
 508            | IS_NO_RIPV2_OUT),  0,              "NO_RIP" },
 509         { (IS_NO_RIPV1_IN
 510            | IS_NO_RIPV1_OUT),  0,              "RIPV2" },
 511         { IS_NO_RIPV1_IN,       0,              "NO_RIPV1_IN" },
 512         { IS_NO_RIPV2_IN,       0,              "NO_RIPV2_IN" },
 513         { IS_NO_RIPV1_OUT,      0,              "NO_RIPV1_OUT" },
 514         { IS_NO_RIPV2_OUT,      0,              "NO_RIPV2_OUT" },
 515         { (IS_NO_ADV_IN
 516            | IS_NO_SOL_OUT
 517            | IS_NO_ADV_OUT),    IS_BCAST_RDISC, "NO_RDISC" },
 518         { IS_NO_SOL_OUT,        0,              "NO_SOLICIT" },
 519         { IS_SOL_OUT,           0,              "SEND_SOLICIT" },
 520         { IS_NO_ADV_OUT,        IS_BCAST_RDISC, "NO_RDISC_ADV" },
 521         { IS_ADV_OUT,           0,              "RDISC_ADV" },
 522         { IS_BCAST_RDISC,       0,              "BCAST_RDISC" },
 523         { IS_PM_RDISC,          0,              "" },
 524         { 0,                    0,              "%#x"}
 525 };
 526
 527 static struct bits rs_bits[] = {
 528         { RS_IF,                0,              "IF" },
 529         { RS_NET_INT,           RS_NET_SYN,     "NET_INT" },
 530         { RS_NET_SYN,           0,              "NET_SYN" },
 531         { RS_SUBNET,            0,              "" },
 532         { RS_LOCAL,             0,              "LOCAL" },
 533         { RS_MHOME,             0,              "MHOME" },
 534         { RS_STATIC,            0,              "STATIC" },
 535         { RS_RDISC,             0,              "RDISC" },
 536         { 0,                    0,              "%#x"}
 537 };
 538
 539
 540 static void
 541 trace_bits(const struct bits *tbl,
 542            u_int field,
 543            int force)
 544 {
 545         u_int b;
 546         char c;
 547
 548         if (force) {
 549                 putc('<', ftrace);
 550                 c = 0;
 551         } else {
 552                 c = '<';
 553         }
 554
 555         while (field != 0
 556                && (b = tbl->bits_mask) != 0) {
 557                 if ((b & field) == b) {
 558                         if (tbl->bits_name[0] != '\0') {
 559                                 if (c)
 560                                         putc(c, ftrace);
 561                                 fprintf(ftrace, "%s", tbl->bits_name);
 562                                 c = '|';
 563                         }
 564                         if (0 == (field &= ~(b | tbl->bits_clear)))
 565                                 break;
 566                 }
 567                 tbl++;
 568         }
 569         if (field != 0 && tbl->bits_name != 0) {
 570                 if (c)
 571                         putc(c, ftrace);
 572                 fprintf(ftrace, tbl->bits_name, field);
 573                 c = '|';
 574         }
 575
 576         if (c != '<' || force)
 577                 fputs("> ", ftrace);
 578 }
 579
 580
 581 char *
 582 rtname(naddr dst,
 583        naddr mask,
 584        naddr gate)
 585 {
 586         static char buf[3*4+3+1+2+3     /* "xxx.xxx.xxx.xxx/xx-->" */
 587                         +3*4+3+1];      /* "xxx.xxx.xxx.xxx" */
 588         int i;
 589
 590         i = sprintf(buf, "%-16s-->", addrname(dst, mask, 0));
 591         sprintf(&buf[i], "%-*s", 15+20-MAX(20,i), naddr_ntoa(gate));
 592         return buf;
 593 }
 594
 595
 596 static void
 597 print_rts(struct rt_spare *rts,
 598           int force_metric,             /* -1=suppress, 0=default */
 599           int force_ifp,                /* -1=suppress, 0=default */
 600           int force_router,             /* -1=suppress, 0=default, 1=display */
 601           int force_tag,                /* -1=suppress, 0=default, 1=display */
 602           int force_time)               /* 0=suppress, 1=display */
 603 {
 604         int i;
 605
 606
 607         if (force_metric >= 0)
 608                 fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
 609         if (force_ifp >= 0)
 610                 fprintf(ftrace, "%s ", (rts->rts_ifp == 0 ?
 611                                         "if?" : rts->rts_ifp->int_name));
 612         if (force_router > 0
 613             || (force_router == 0 && rts->rts_router != rts->rts_gate))
 614                 fprintf(ftrace, "router=%s ", naddr_ntoa(rts->rts_router));
 615         if (force_time > 0)
 616                 fprintf(ftrace, "%s ", ts(rts->rts_time));
 617         if (force_tag > 0
 618             || (force_tag == 0 && rts->rts_tag != 0))
 619                 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                 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         fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
 638         fprintf(ftrace, "%-15s-->%-15s ",
 639                 naddr_ntoa(ifp->int_addr),
 640                 addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
 641                           ? ifp->int_dstaddr : htonl(ifp->int_net)),
 642                          ifp->int_mask, 1));
 643         if (ifp->int_metric != 0)
 644                 fprintf(ftrace, "metric=%d ", ifp->int_metric);
 645         if (!IS_RIP_OUT_OFF(ifp->int_state)
 646             && ifp->int_d_metric != 0)
 647                 fprintf(ftrace, "fake_default=%d ", ifp->int_d_metric);
 648         trace_bits(if_bits, ifp->int_if_flags, 0);
 649         trace_bits(is_bits, ifp->int_state, 0);
 650         fputc('\n',ftrace);
 651 }
 652
 653
 654 void
 655 trace_upslot(struct rt_entry *rt,
 656              struct rt_spare *rts,
 657              struct rt_spare *new)
 658 {
 659         if (!TRACEACTIONS || ftrace == 0)
 660                 return;
 661
 662         if (rts->rts_gate == new->rts_gate
 663             && rts->rts_router == new->rts_router
 664             && rts->rts_metric == new->rts_metric
 665             && rts->rts_tag == new->rts_tag
 666             && rts->rts_de_ag == new->rts_de_ag)
 667                 return;
 668
 669         lastlog();
 670         if (new->rts_gate == 0) {
 671                 fprintf(ftrace, "Del #%d %-35s ",
 672                         (int)(rts - rt->rt_spares),
 673                         rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 674                 print_rts(rts, 0,0,0,0,
 675                           (rts != rt->rt_spares
 676                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 677
 678         } else if (rts->rts_gate != RIP_DEFAULT) {
 679                 fprintf(ftrace, "Chg #%d %-35s ",
 680                         (int)(rts - rt->rt_spares),
 681                         rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 682                 print_rts(rts, 0,0,
 683                           rts->rts_gate != new->rts_gate,
 684                           rts->rts_tag != new->rts_tag,
 685                           rts != rt->rt_spares || AGE_RT(rt->rt_state,
 686                                                         rt->rt_ifp));
 687
 688                 fprintf(ftrace, "\n       %19s%-16s ", "",
 689                         (new->rts_gate != rts->rts_gate
 690                         ? naddr_ntoa(new->rts_gate) : ""));
 691                 print_rts(new,
 692                           -(new->rts_metric == rts->rts_metric),
 693                           -(new->rts_ifp == rts->rts_ifp),
 694                           0,
 695                           rts->rts_tag != new->rts_tag,
 696                           (new->rts_time != rts->rts_time
 697                            && (rts != rt->rt_spares
 698                                || AGE_RT(rt->rt_state, new->rts_ifp))));
 699
 700         } else {
 701                 fprintf(ftrace, "Add #%d %-35s ",
 702                         (int)(rts - rt->rt_spares),
 703                         rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
 704                 print_rts(new, 0,0,0,0,
 705                           (rts != rt->rt_spares
 706                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 707         }
 708         fputc('\n',ftrace);
 709 }
 710
 711
 712 /* miscellaneous message checked by the caller
 713  */
 714 void
 715 trace_misc(const char *p, ...)
 716 {
 717         va_list args;
 718
 719         if (ftrace == 0)
 720                 return;
 721
 722         lastlog();
 723         va_start(args, p);
 724         vfprintf(ftrace, p, args);
 725         fputc('\n',ftrace);
 726 }
 727
 728
 729 /* display a message if tracing actions
 730  */
 731 void
 732 trace_act(const char *p, ...)
 733 {
 734         va_list args;
 735
 736         if (!TRACEACTIONS || ftrace == 0)
 737                 return;
 738
 739         lastlog();
 740         va_start(args, p);
 741         vfprintf(ftrace, p, args);
 742         fputc('\n',ftrace);
 743 }
 744
 745
 746 /* display a message if tracing packets
 747  */
 748 void
 749 trace_pkt(const char *p, ...)
 750 {
 751         va_list args;
 752
 753         if (!TRACEPACKETS || ftrace == 0)
 754                 return;
 755
 756         lastlog();
 757         va_start(args, p);
 758         vfprintf(ftrace, p, args);
 759         fputc('\n',ftrace);
 760 }
 761
 762
 763 void
 764 trace_change(struct rt_entry *rt,
 765              u_int      state,
 766              struct     rt_spare *new,
 767              const char *label)
 768 {
 769         if (ftrace == 0)
 770                 return;
 771
 772         if (rt->rt_metric == new->rts_metric
 773             && rt->rt_gate == new->rts_gate
 774             && rt->rt_router == new->rts_router
 775             && rt->rt_state == state
 776             && rt->rt_tag == new->rts_tag
 777             && rt->rt_de_ag == new->rts_de_ag)
 778                 return;
 779
 780         lastlog();
 781         fprintf(ftrace, "%s %-35s ",
 782                 label, rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 783         print_rts(rt->rt_spares,
 784                   0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
 785         trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
 786
 787         fprintf(ftrace, "\n%*s %19s%-16s ",
 788                 (int)strlen(label), "", "",
 789                 (rt->rt_gate != new->rts_gate
 790                  ? naddr_ntoa(new->rts_gate) : ""));
 791         print_rts(new,
 792                   -(new->rts_metric == rt->rt_metric),
 793                   -(new->rts_ifp == rt->rt_ifp),
 794                   0,
 795                   rt->rt_tag != new->rts_tag,
 796                   (rt->rt_time != new->rts_time
 797                    && AGE_RT(rt->rt_state,new->rts_ifp)));
 798         if (rt->rt_state != state)
 799                 trace_bits(rs_bits, state, 1);
 800         fputc('\n',ftrace);
 801 }
 802
 803
 804 void
 805 trace_add_del(const char * action, struct rt_entry *rt)
 806 {
 807         if (ftrace == 0)
 808                 return;
 809
 810         lastlog();
 811         fprintf(ftrace, "%s    %-35s ",
 812                 action, rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 813         print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
 814         trace_bits(rs_bits, rt->rt_state, 0);
 815         fputc('\n',ftrace);
 816 }
 817
 818
 819 /* ARGSUSED */
 820 static int
 821 walk_trace(struct radix_node *rn,
 822            struct walkarg *w UNUSED)
 823 {
 824 #define RT ((struct rt_entry *)rn)
 825         struct rt_spare *rts;
 826         int i;
 827
 828         fprintf(ftrace, "  %-35s ",
 829                 rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
 830         print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp));
 831         trace_bits(rs_bits, RT->rt_state, 0);
 832         if (RT->rt_poison_time >= now_garbage
 833             && RT->rt_poison_metric < RT->rt_metric)
 834                 fprintf(ftrace, "pm=%d@%s",
 835                         RT->rt_poison_metric, ts(RT->rt_poison_time));
 836
 837         rts = &RT->rt_spares[1];
 838         for (i = 1; i < NUM_SPARES; i++, rts++) {
 839                 if (rts->rts_gate != RIP_DEFAULT) {
 840                         fprintf(ftrace,"\n    #%d%15s%-16s ",
 841                                 i, "", naddr_ntoa(rts->rts_gate));
 842                         print_rts(rts, 0,0,0,0,1);
 843                 }
 844         }
 845         fputc('\n',ftrace);
 846
 847         return 0;
 848 }
 849
 850
 851 static void
 852 trace_dump(void)
 853 {
 854         struct interface *ifp;
 855
 856         if (ftrace == 0)
 857                 return;
 858         lastlog();
 859
 860         fputs("current daemon state:\n", ftrace);
 861         for (ifp = ifnet; ifp != 0; ifp = ifp->int_next)
 862                 trace_if("", ifp);
 863         rn_walktree(rhead, walk_trace, 0);
 864 }
 865
 866
 867 void
 868 trace_rip(const char *dir1, const char *dir2,
 869           struct sockaddr_in *who,
 870           struct interface *ifp,
 871           struct rip *msg,
 872           int size)                     /* total size of message */
 873 {
 874         struct netinfo *n, *lim;
 875 #       define NA ((struct netauth*)n)
 876         int i, seen_route;
 877
 878         if (!TRACEPACKETS || ftrace == 0)
 879                 return;
 880
 881         lastlog();
 882         if (msg->rip_cmd >= RIPCMD_MAX
 883             || msg->rip_vers == 0) {
 884                 fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
 885                         " %s.%d size=%d\n",
 886                         dir1, msg->rip_vers, msg->rip_cmd, dir2,
 887                         naddr_ntoa(who->sin_addr.s_addr),
 888                         ntohs(who->sin_port),
 889                         size);
 890                 return;
 891         }
 892
 893         fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
 894                 dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
 895                 naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
 896                 ifp ? " via " : "", ifp ? ifp->int_name : "");
 897         if (!TRACECONTENTS)
 898                 return;
 899
 900         seen_route = 0;
 901         switch (msg->rip_cmd) {
 902         case RIPCMD_REQUEST:
 903         case RIPCMD_RESPONSE:
 904                 n = msg->rip_nets;
 905                 lim = (struct netinfo *)((char*)msg + size);
 906                 for (; n < lim; n++) {
 907                         if (!seen_route
 908                             && n->n_family == RIP_AF_UNSPEC
 909                             && ntohl(n->n_metric) == HOPCNT_INFINITY
 910                             && msg->rip_cmd == RIPCMD_REQUEST
 911                             && (n+1 == lim
 912                                 || (n+2 == lim
 913                                     && (n+1)->n_family == RIP_AF_AUTH))) {
 914                                 fputs("\tQUERY ", ftrace);
 915                                 if (n->n_dst != 0)
 916                                         fprintf(ftrace, "%s ",
 917                                                 naddr_ntoa(n->n_dst));
 918                                 if (n->n_mask != 0)
 919                                         fprintf(ftrace, "mask=%#x ",
 920                                                 (u_int)ntohl(n->n_mask));
 921                                 if (n->n_nhop != 0)
 922                                         fprintf(ftrace, "nhop=%s ",
 923                                                 naddr_ntoa(n->n_nhop));
 924                                 if (n->n_tag != 0)
 925                                         fprintf(ftrace, "tag=%#x ",
 926                                                 ntohs(n->n_tag));
 927                                 fputc('\n',ftrace);
 928                                 continue;
 929                         }
 930
 931                         if (n->n_family == RIP_AF_AUTH) {
 932                                 if (NA->a_type == RIP_AUTH_PW
 933                                     && n == msg->rip_nets) {
 934                                         fprintf(ftrace, "\tPassword"
 935                                                 " Authentication:"
 936                                                 " \"%s\"\n",
 937                                                 qstring(NA->au.au_pw,
 938                                                         RIP_AUTH_PW_LEN));
 939                                         continue;
 940                                 }
 941
 942                                 if (NA->a_type == RIP_AUTH_MD5
 943                                     && n == msg->rip_nets) {
 944                                         fprintf(ftrace,
 945                                                 "\tMD5 Auth"
 946                                                 " pkt_len=%d KeyID=%u"
 947                                                 " auth_len=%d"
 948                                                 " seqno=%#x"
 949                                                 " rsvd=%#x,%#x\n",
 950                                             ntohs(NA->au.a_md5.md5_pkt_len),
 951                                             NA->au.a_md5.md5_keyid,
 952                                             NA->au.a_md5.md5_auth_len,
 953                                             (int)ntohl(NA->au.a_md5.md5_seqno),
 954                                             (int)ntohs(NA->au.a_md5.rsvd[0]),
 955                                             (int)ntohs(NA->au.a_md5.rsvd[1]));
 956                                         continue;
 957                                 }
 958                                 fprintf(ftrace,
 959                                         "\tAuthentication type %d: ",
 960                                         ntohs(NA->a_type));
 961                                 for (i = 0;
 962                                      i < (int)sizeof(NA->au.au_pw);
 963                                      i++)
 964                                         fprintf(ftrace, "%02x ",
 965                                                 NA->au.au_pw[i]);
 966                                 fputc('\n',ftrace);
 967                                 continue;
 968                         }
 969
 970                         seen_route = 1;
 971                         if (n->n_family != RIP_AF_INET) {
 972                                 fprintf(ftrace,
 973                                         "\t(af %d) %-18s mask=%#x ",
 974                                         ntohs(n->n_family),
 975                                         naddr_ntoa(n->n_dst),
 976                                         (u_int)ntohl(n->n_mask));
 977                         } else if (msg->rip_vers == RIPv1) {
 978                                 fprintf(ftrace, "\t%-18s ",
 979                                         addrname(n->n_dst, ntohl(n->n_mask),
 980                                                  n->n_mask==0 ? 2 : 1));
 981                         } else {
 982                                 fprintf(ftrace, "\t%-18s ",
 983                                         addrname(n->n_dst, ntohl(n->n_mask),
 984                                                  n->n_mask==0 ? 2 : 0));
 985                         }
 986                         fprintf(ftrace, "metric=%-2d ",
 987                                 (u_int)ntohl(n->n_metric));
 988                         if (n->n_nhop != 0)
 989                                 fprintf(ftrace, " nhop=%s ",
 990                                         naddr_ntoa(n->n_nhop));
 991                         if (n->n_tag != 0)
 992                                 fprintf(ftrace, "tag=%#x", ntohs(n->n_tag));
 993                         fputc('\n',ftrace);
 994                 }
 995                 if (size != (char *)n - (char *)msg)
 996                         fprintf(ftrace, "truncated record, len %d\n", size);
 997                 break;
 998
 999         case RIPCMD_TRACEON:
1000                 fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
1001                         msg->rip_tracefile);
1002                 break;
1003
1004         case RIPCMD_TRACEOFF:
1005                 break;
1006         }
1007 }