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  */
  35
  36 #define RIPCMDS
  37 #include "defs.h"
  38 #include "pathnames.h"
  39 #include <sys/stat.h>
  40 #include <sys/signal.h>
  41 #include <fcntl.h>
  42
  43 #if !defined(sgi) && !defined(__NetBSD__)
  44 static char sccsid[] __attribute__((unused)) = "@(#)trace.c     8.1 (Berkeley) 6/5/93";
  45 #elif defined(__NetBSD__)
  46 __RCSID("$NetBSD$");
  47 #endif
  48 #ident "$FreeBSD: src/sbin/routed/trace.c,v 1.5.2.1 2002/11/07 17:19:13 imp Exp $"
  49
  50
  51 #ifdef sgi
  52 /* use *stat64 for files on large filesystems */
  53 #define stat    stat64
  54 #endif
  55
  56 #define NRECORDS        50              /* size of circular trace buffer */
  57
  58 int     tracelevel, new_tracelevel;
  59 FILE    *ftrace;                /* output trace file */
  60 static const char *sigtrace_pat = "%s";
  61 static char savetracename[MAXPATHLEN+1];
  62 char    inittracename[MAXPATHLEN+1];
  63 int     file_trace;                     /* 1=tracing to file, not stdout */
  64
  65 static void trace_dump(void);
  66 static void tmsg(const char *, ...) PATTRIB(1,2);
  67
  68
  69 /* convert string to printable characters
  70  */
  71 static char *
  72 qstring(u_char *s, int len)
  73 {
  74         static char buf[8*20+1];
  75         char *p;
  76         u_char *s2, c;
  77
  78
  79         for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
  80                 c = *s++;
  81                 if (c == '\0') {
  82                         for (s2 = s+1; s2 < &s[len]; s2++) {
  83                                 if (*s2 != '\0')
  84                                         break;
  85                         }
  86                         if (s2 >= &s[len])
  87                             goto exit;
  88                 }
  89
  90                 if (c >= ' ' && c < 0x7f && c != '\\') {
  91                         *p++ = c;
  92                         continue;
  93                 }
  94                 *p++ = '\\';
  95                 switch (c) {
  96                 case '\\':
  97                         *p++ = '\\';
  98                         break;
  99                 case '\n':
 100                         *p++= 'n';
 101                         break;
 102                 case '\r':
 103                         *p++= 'r';
 104                         break;
 105                 case '\t':
 106                         *p++ = 't';
 107                         break;
 108                 case '\b':
 109                         *p++ = 'b';
 110                         break;
 111                 default:
 112                         p += sprintf(p,"%o",c);
 113                         break;
 114                 }
 115         }
 116 exit:
 117         *p = '\0';
 118         return buf;
 119 }
 120
 121
 122 /* convert IP address to a string, but not into a single buffer
 123  */
 124 char *
 125 naddr_ntoa(naddr a)
 126 {
 127 #define NUM_BUFS 4
 128         static int bufno;
 129         static struct {
 130             char    str[16];            /* xxx.xxx.xxx.xxx\0 */
 131         } bufs[NUM_BUFS];
 132         char *s;
 133         struct in_addr addr;
 134
 135         addr.s_addr = a;
 136         s = strcpy(bufs[bufno].str, inet_ntoa(addr));
 137         bufno = (bufno+1) % NUM_BUFS;
 138         return s;
 139 #undef NUM_BUFS
 140 }
 141
 142
 143 const char *
 144 saddr_ntoa(struct sockaddr *sa)
 145 {
 146         return (sa == 0) ? "?" : naddr_ntoa(S_ADDR(sa));
 147 }
 148
 149
 150 static char *
 151 ts(time_t secs) {
 152         static char s[20];
 153
 154         secs += epoch.tv_sec;
 155 #ifdef sgi
 156         (void)cftime(s, "%T", &secs);
 157 #else
 158         memcpy(s, ctime(&secs)+11, 8);
 159         s[8] = '\0';
 160 #endif
 161         return s;
 162 }
 163
 164
 165 /* On each event, display a time stamp.
 166  * This assumes that 'now' is update once for each event, and
 167  * that at least now.tv_usec changes.
 168  */
 169 static struct timeval lastlog_time;
 170
 171 void
 172 lastlog(void)
 173 {
 174         if (lastlog_time.tv_sec != now.tv_sec
 175             || lastlog_time.tv_usec != now.tv_usec) {
 176                 (void)fprintf(ftrace, "-- %s --\n", ts(now.tv_sec));
 177                 lastlog_time = now;
 178         }
 179 }
 180
 181
 182 static void
 183 tmsg(const char *p, ...)
 184 {
 185         va_list args;
 186
 187         if (ftrace != 0) {
 188                 lastlog();
 189                 va_start(args, p);
 190                 vfprintf(ftrace, p, args);
 191                 (void)fputc('\n',ftrace);
 192                 fflush(ftrace);
 193         }
 194 }
 195
 196
 197 void
 198 trace_close(int zap_stdio)
 199 {
 200         int fd;
 201
 202
 203         fflush(stdout);
 204         fflush(stderr);
 205
 206         if (ftrace != 0 && zap_stdio) {
 207                 if (ftrace != stdout)
 208                         fclose(ftrace);
 209                 ftrace = 0;
 210                 fd = open(_PATH_DEVNULL, O_RDWR);
 211                 if (isatty(STDIN_FILENO))
 212                         (void)dup2(fd, STDIN_FILENO);
 213                 if (isatty(STDOUT_FILENO))
 214                         (void)dup2(fd, STDOUT_FILENO);
 215                 if (isatty(STDERR_FILENO))
 216                         (void)dup2(fd, STDERR_FILENO);
 217                 (void)close(fd);
 218         }
 219         lastlog_time.tv_sec = 0;
 220 }
 221
 222
 223 void
 224 trace_flush(void)
 225 {
 226         if (ftrace != 0) {
 227                 fflush(ftrace);
 228                 if (ferror(ftrace))
 229                         trace_off("tracing off: %s", strerror(ferror(ftrace)));
 230         }
 231 }
 232
 233
 234 void
 235 trace_off(const char *p, ...)
 236 {
 237         va_list args;
 238
 239
 240         if (ftrace != 0) {
 241                 lastlog();
 242                 va_start(args, p);
 243                 vfprintf(ftrace, p, 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 (!IS_RIP_OUT_OFF(ifp->int_state)
 647             && ifp->int_d_metric != 0)
 648                 (void)fprintf(ftrace, "fake_default=%d ", ifp->int_d_metric);
 649         trace_bits(if_bits, ifp->int_if_flags, 0);
 650         trace_bits(is_bits, ifp->int_state, 0);
 651         (void)fputc('\n',ftrace);
 652 }
 653
 654
 655 void
 656 trace_upslot(struct rt_entry *rt,
 657              struct rt_spare *rts,
 658              struct rt_spare *new)
 659 {
 660         if (!TRACEACTIONS || ftrace == 0)
 661                 return;
 662
 663         if (rts->rts_gate == new->rts_gate
 664             && rts->rts_router == new->rts_router
 665             && rts->rts_metric == new->rts_metric
 666             && rts->rts_tag == new->rts_tag
 667             && rts->rts_de_ag == new->rts_de_ag)
 668                 return;
 669
 670         lastlog();
 671         if (new->rts_gate == 0) {
 672                 (void)fprintf(ftrace, "Del #%d %-35s ",
 673                               (int)(rts - rt->rt_spares),
 674                               rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 675                 print_rts(rts, 0,0,0,0,
 676                           (rts != rt->rt_spares
 677                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 678
 679         } else if (rts->rts_gate != RIP_DEFAULT) {
 680                 (void)fprintf(ftrace, "Chg #%d %-35s ",
 681                               (int)(rts - rt->rt_spares),
 682                               rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
 683                 print_rts(rts, 0,0,
 684                           rts->rts_gate != new->rts_gate,
 685                           rts->rts_tag != new->rts_tag,
 686                           rts != rt->rt_spares || AGE_RT(rt->rt_state,
 687                                                         rt->rt_ifp));
 688
 689                 (void)fprintf(ftrace, "\n       %19s%-16s ", "",
 690                               (new->rts_gate != rts->rts_gate
 691                                ? naddr_ntoa(new->rts_gate) : ""));
 692                 print_rts(new,
 693                           -(new->rts_metric == rts->rts_metric),
 694                           -(new->rts_ifp == rts->rts_ifp),
 695                           0,
 696                           rts->rts_tag != new->rts_tag,
 697                           (new->rts_time != rts->rts_time
 698                            && (rts != rt->rt_spares
 699                                || AGE_RT(rt->rt_state, new->rts_ifp))));
 700
 701         } else {
 702                 (void)fprintf(ftrace, "Add #%d %-35s ",
 703                               (int)(rts - rt->rt_spares),
 704                               rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
 705                 print_rts(new, 0,0,0,0,
 706                           (rts != rt->rt_spares
 707                            || AGE_RT(rt->rt_state,new->rts_ifp)));
 708         }
 709         (void)fputc('\n',ftrace);
 710 }
 711
 712
 713 /* miscellaneous message checked by the caller
 714  */
 715 void
 716 trace_misc(const char *p, ...)
 717 {
 718         va_list args;
 719
 720         if (ftrace == 0)
 721                 return;
 722
 723         lastlog();
 724         va_start(args, p);
 725         vfprintf(ftrace, p, args);
 726         (void)fputc('\n',ftrace);
 727 }
 728
 729
 730 /* display a message if tracing actions
 731  */
 732 void
 733 trace_act(const char *p, ...)
 734 {
 735         va_list args;
 736
 737         if (!TRACEACTIONS || ftrace == 0)
 738                 return;
 739
 740         lastlog();
 741         va_start(args, p);
 742         vfprintf(ftrace, p, args);
 743         (void)fputc('\n',ftrace);
 744 }
 745
 746
 747 /* display a message if tracing packets
 748  */
 749 void
 750 trace_pkt(const char *p, ...)
 751 {
 752         va_list args;
 753
 754         if (!TRACEPACKETS || ftrace == 0)
 755                 return;
 756
 757         lastlog();
 758         va_start(args, p);
 759         vfprintf(ftrace, p, args);
 760         (void)fputc('\n',ftrace);
 761 }
 762
 763
 764 void
 765 trace_change(struct rt_entry *rt,
 766              u_int      state,
 767              struct     rt_spare *new,
 768              const char *label)
 769 {
 770         if (ftrace == 0)
 771                 return;
 772
 773         if (rt->rt_metric == new->rts_metric
 774             && rt->rt_gate == new->rts_gate
 775             && rt->rt_router == new->rts_router
 776             && rt->rt_state == state
 777             && rt->rt_tag == new->rts_tag
 778             && rt->rt_de_ag == new->rts_de_ag)
 779                 return;
 780
 781         lastlog();
 782         (void)fprintf(ftrace, "%s %-35s ",
 783                       label,
 784                       rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 785         print_rts(rt->rt_spares,
 786                   0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
 787         trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
 788
 789         (void)fprintf(ftrace, "\n%*s %19s%-16s ",
 790                       (int)strlen(label), "", "",
 791                       (rt->rt_gate != new->rts_gate
 792                        ? naddr_ntoa(new->rts_gate) : ""));
 793         print_rts(new,
 794                   -(new->rts_metric == rt->rt_metric),
 795                   -(new->rts_ifp == rt->rt_ifp),
 796                   0,
 797                   rt->rt_tag != new->rts_tag,
 798                   (rt->rt_time != new->rts_time
 799                    && AGE_RT(rt->rt_state,new->rts_ifp)));
 800         if (rt->rt_state != state)
 801                 trace_bits(rs_bits, state, 1);
 802         (void)fputc('\n',ftrace);
 803 }
 804
 805
 806 void
 807 trace_add_del(const char * action, struct rt_entry *rt)
 808 {
 809         if (ftrace == 0)
 810                 return;
 811
 812         lastlog();
 813         (void)fprintf(ftrace, "%s    %-35s ",
 814                       action,
 815                       rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
 816         print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
 817         trace_bits(rs_bits, rt->rt_state, 0);
 818         (void)fputc('\n',ftrace);
 819 }
 820
 821
 822 /* ARGSUSED */
 823 static int
 824 walk_trace(struct radix_node *rn,
 825            struct walkarg *w UNUSED)
 826 {
 827 #define RT ((struct rt_entry *)rn)
 828         struct rt_spare *rts;
 829         int i;
 830
 831         (void)fprintf(ftrace, "  %-35s ",
 832                       rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
 833         print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp));
 834         trace_bits(rs_bits, RT->rt_state, 0);
 835         if (RT->rt_poison_time >= now_garbage
 836             && RT->rt_poison_metric < RT->rt_metric)
 837                 (void)fprintf(ftrace, "pm=%d@%s",
 838                               RT->rt_poison_metric, ts(RT->rt_poison_time));
 839
 840         rts = &RT->rt_spares[1];
 841         for (i = 1; i < NUM_SPARES; i++, rts++) {
 842                 if (rts->rts_gate != RIP_DEFAULT) {
 843                         (void)fprintf(ftrace,"\n    #%d%15s%-16s ",
 844                                       i, "", naddr_ntoa(rts->rts_gate));
 845                         print_rts(rts, 0,0,0,0,1);
 846                 }
 847         }
 848         (void)fputc('\n',ftrace);
 849
 850         return 0;
 851 }
 852
 853
 854 static void
 855 trace_dump(void)
 856 {
 857         struct interface *ifp;
 858
 859         if (ftrace == 0)
 860                 return;
 861         lastlog();
 862
 863         (void)fputs("current daemon state:\n", ftrace);
 864         for (ifp = ifnet; ifp != 0; ifp = ifp->int_next)
 865                 trace_if("", ifp);
 866         (void)rn_walktree(rhead, walk_trace, 0);
 867 }
 868
 869
 870 void
 871 trace_rip(const char *dir1, const char *dir2,
 872           struct sockaddr_in *who,
 873           struct interface *ifp,
 874           struct rip *msg,
 875           int size)                     /* total size of message */
 876 {
 877         struct netinfo *n, *lim;
 878 #       define NA ((struct netauth*)n)
 879         int i, seen_route;
 880
 881         if (!TRACEPACKETS || ftrace == 0)
 882                 return;
 883
 884         lastlog();
 885         if (msg->rip_cmd >= RIPCMD_MAX
 886             || msg->rip_vers == 0) {
 887                 (void)fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
 888                               " %s.%d size=%d\n",
 889                               dir1, msg->rip_vers, msg->rip_cmd, dir2,
 890                               naddr_ntoa(who->sin_addr.s_addr),
 891                               ntohs(who->sin_port),
 892                               size);
 893                 return;
 894         }
 895
 896         (void)fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
 897                       dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
 898                       naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
 899                       ifp ? " via " : "", ifp ? ifp->int_name : "");
 900         if (!TRACECONTENTS)
 901                 return;
 902
 903         seen_route = 0;
 904         switch (msg->rip_cmd) {
 905         case RIPCMD_REQUEST:
 906         case RIPCMD_RESPONSE:
 907                 n = msg->rip_nets;
 908                 lim = (struct netinfo *)((char*)msg + size);
 909                 for (; n < lim; n++) {
 910                         if (!seen_route
 911                             && n->n_family == RIP_AF_UNSPEC
 912                             && ntohl(n->n_metric) == HOPCNT_INFINITY
 913                             && msg->rip_cmd == RIPCMD_REQUEST
 914                             && (n+1 == lim
 915                                 || (n+2 == lim
 916                                     && (n+1)->n_family == RIP_AF_AUTH))) {
 917                                 (void)fputs("\tQUERY ", ftrace);
 918                                 if (n->n_dst != 0)
 919                                         (void)fprintf(ftrace, "%s ",
 920                                                       naddr_ntoa(n->n_dst));
 921                                 if (n->n_mask != 0)
 922                                         (void)fprintf(ftrace, "mask=%#x ",
 923                                                       (u_int)ntohl(n->n_mask));
 924                                 if (n->n_nhop != 0)
 925                                         (void)fprintf(ftrace, "nhop=%s ",
 926                                                       naddr_ntoa(n->n_nhop));
 927                                 if (n->n_tag != 0)
 928                                         (void)fprintf(ftrace, "tag=%#x ",
 929                                                       ntohs(n->n_tag));
 930                                 (void)fputc('\n',ftrace);
 931                                 continue;
 932                         }
 933
 934                         if (n->n_family == RIP_AF_AUTH) {
 935                                 if (NA->a_type == RIP_AUTH_PW
 936                                     && n == msg->rip_nets) {
 937                                         (void)fprintf(ftrace, "\tPassword"
 938                                                       " Authentication:"
 939                                                       " \"%s\"\n",
 940                                                       qstring(NA->au.au_pw,
 941                                                           RIP_AUTH_PW_LEN));
 942                                         continue;
 943                                 }
 944
 945                                 if (NA->a_type == RIP_AUTH_MD5
 946                                     && n == msg->rip_nets) {
 947                                         (void)fprintf(ftrace,
 948                                                       "\tMD5 Auth"
 949                                                       " pkt_len=%d KeyID=%u"
 950                                                       " auth_len=%d"
 951                                                       " seqno=%#x"
 952                                                       " rsvd=%#x,%#x\n",
 953                                             ntohs(NA->au.a_md5.md5_pkt_len),
 954                                             NA->au.a_md5.md5_keyid,
 955                                             NA->au.a_md5.md5_auth_len,
 956                                             (int)ntohl(NA->au.a_md5.md5_seqno),
 957                                             (int)ntohs(NA->au.a_md5.rsvd[0]),
 958                                             (int)ntohs(NA->au.a_md5.rsvd[1]));
 959                                         continue;
 960                                 }
 961                                 (void)fprintf(ftrace,
 962                                               "\tAuthentication type %d: ",
 963                                               ntohs(NA->a_type));
 964                                 for (i = 0;
 965                                      i < (int)sizeof(NA->au.au_pw);
 966                                      i++)
 967                                         (void)fprintf(ftrace, "%02x ",
 968                                                       NA->au.au_pw[i]);
 969                                 (void)fputc('\n',ftrace);
 970                                 continue;
 971                         }
 972
 973                         seen_route = 1;
 974                         if (n->n_family != RIP_AF_INET) {
 975                                 (void)fprintf(ftrace,
 976                                               "\t(af %d) %-18s mask=%#x ",
 977                                               ntohs(n->n_family),
 978                                               naddr_ntoa(n->n_dst),
 979                                               (u_int)ntohl(n->n_mask));
 980                         } else if (msg->rip_vers == RIPv1) {
 981                                 (void)fprintf(ftrace, "\t%-18s ",
 982                                               addrname(n->n_dst,
 983                                                        ntohl(n->n_mask),
 984                                                        n->n_mask==0 ? 2 : 1));
 985                         } else {
 986                                 (void)fprintf(ftrace, "\t%-18s ",
 987                                               addrname(n->n_dst,
 988                                                        ntohl(n->n_mask),
 989                                                        n->n_mask==0 ? 2 : 0));
 990                         }
 991                         (void)fprintf(ftrace, "metric=%-2d ",
 992                                       (u_int)ntohl(n->n_metric));
 993                         if (n->n_nhop != 0)
 994                                 (void)fprintf(ftrace, " nhop=%s ",
 995                                               naddr_ntoa(n->n_nhop));
 996                         if (n->n_tag != 0)
 997                                 (void)fprintf(ftrace, "tag=%#x",
 998                                               ntohs(n->n_tag));
 999                         (void)fputc('\n',ftrace);
1000                 }
1001                 if (size != (char *)n - (char *)msg)
1002                         (void)fprintf(ftrace, "truncated record, len %d\n",
1003                                 size);
1004                 break;
1005
1006         case RIPCMD_TRACEON:
1007                 fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
1008                         msg->rip_tracefile);
1009                 break;
1010
1011         case RIPCMD_TRACEOFF:
1012                 break;
1013         }
1014 }