1 /* $NetBSD: trace.c,v 1.33 2017/10/02 11:02:19 maya Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgment: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 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 #ifdef __NetBSD__ 44 __RCSID("$NetBSD: trace.c,v 1.33 2017/10/02 11:02:19 maya Exp $"); 45 #elif defined(__FreeBSD__) 46 __RCSID("$FreeBSD$"); 47 #else 48 __RCSID("Revision: 2.27 "); 49 #ident "Revision: 2.27 " 50 #endif 51 52 #define NRECORDS 50 /* size of circular trace buffer */ 53 54 int tracelevel, new_tracelevel; 55 FILE *ftrace = stdout; /* output trace file */ 56 static const char *sigtrace_pat = "%s"; 57 static char savetracename[MAXPATHLEN+1]; 58 char inittracename[MAXPATHLEN+1]; 59 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 int n; 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 n = snprintf(p, sizeof(buf) - (p - buf), "%o", c); 109 if (n <= 0) 110 goto exit; 111 p += n; 112 break; 113 } 114 } 115 exit: 116 *p = '\0'; 117 return buf; 118 } 119 120 121 /* convert IP address to a string, but not into a single buffer 122 */ 123 char * 124 naddr_ntoa(naddr a) 125 { 126 #define NUM_BUFS 4 127 static int bufno; 128 static struct { 129 char str[16]; /* xxx.xxx.xxx.xxx\0 */ 130 } bufs[NUM_BUFS]; 131 char *s; 132 struct in_addr addr; 133 134 addr.s_addr = a; 135 strlcpy(bufs[bufno].str, inet_ntoa(addr), sizeof(bufs[bufno].str)); 136 s = bufs[bufno].str; 137 bufno = (bufno+1) % NUM_BUFS; 138 return s; 139 #undef NUM_BUFS 140 } 141 142 143 const char * 144 saddr_ntoa(const 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 memcpy(s, ctime(&secs)+11, 8); 156 s[8] = '\0'; 157 158 return s; 159 } 160 161 162 /* On each event, display a time stamp. 163 * This assumes that 'now' is update once for each event, and 164 * that at least now.tv_usec changes. 165 */ 166 static struct timeval lastlog_time; 167 168 void 169 lastlog(void) 170 { 171 if (lastlog_time.tv_sec != now.tv_sec 172 || lastlog_time.tv_usec != now.tv_usec) { 173 (void)fprintf(ftrace, "-- %s --\n", ts(now.tv_sec)); 174 lastlog_time = now; 175 } 176 } 177 178 179 static void 180 tmsg(const char *p, ...) 181 { 182 va_list args; 183 184 if (ftrace != 0) { 185 lastlog(); 186 va_start(args, p); 187 vfprintf(ftrace, p, args); 188 va_end(args); 189 (void)fputc('\n',ftrace); 190 fflush(ftrace); 191 } 192 } 193 194 195 void 196 trace_close(int zap_stdio) 197 { 198 int fd; 199 200 201 fflush(stdout); 202 fflush(stderr); 203 204 if (ftrace != 0 && zap_stdio) { 205 if (ftrace != stdout) 206 fclose(ftrace); 207 ftrace = 0; 208 fd = open(_PATH_DEVNULL, O_RDWR); 209 if (fd == -1) 210 return; 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 va_end(args); 245 (void)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 strlcpy(savetracename, fn, sizeof(savetracename)); 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 size_t l; 446 int i; 447 448 strlcpy(bufs[bufno].str, naddr_ntoa(addr), sizeof(bufs[bufno].str)); 449 s = bufs[bufno].str; 450 l = sizeof(bufs[bufno].str); 451 bufno = (bufno+1) % NUM_BUFS; 452 453 if (force == 1 || (force == 0 && mask != std_mask(addr))) { 454 sp = &s[strlen(s)]; 455 456 dmask = mask & -mask; 457 if (mask + dmask == 0) { 458 for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++) 459 continue; 460 (void)snprintf(sp, s + l - sp, "/%d", 32-i); 461 462 } else { 463 (void)snprintf(sp, s + l - sp, " (mask %#x)", 464 (u_int)mask); 465 } 466 } 467 468 return s; 469 #undef NUM_BUFS 470 } 471 472 473 /* display a bit-field 474 */ 475 struct bits { 476 u_int bits_mask; 477 u_int bits_clear; 478 const char *bits_name; 479 }; 480 481 static struct bits if_bits[] = { 482 { IFF_LOOPBACK, 0, "LOOPBACK" }, 483 { IFF_POINTOPOINT, 0, "PT-TO-PT" }, 484 { 0, 0, 0} 485 }; 486 487 static struct bits is_bits[] = { 488 { IS_ALIAS, 0, "ALIAS" }, 489 { IS_SUBNET, 0, "" }, 490 { IS_REMOTE, (IS_NO_RDISC 491 | IS_BCAST_RDISC), "REMOTE" }, 492 { IS_PASSIVE, (IS_NO_RDISC 493 | IS_NO_RIP 494 | IS_NO_SUPER_AG 495 | IS_PM_RDISC 496 | IS_NO_AG), "PASSIVE" }, 497 { IS_EXTERNAL, 0, "EXTERNAL" }, 498 { IS_CHECKED, 0, "" }, 499 { IS_ALL_HOSTS, 0, "" }, 500 { IS_ALL_ROUTERS, 0, "" }, 501 { IS_DISTRUST, 0, "DISTRUST" }, 502 { IS_BROKE, IS_SICK, "BROKEN" }, 503 { IS_SICK, 0, "SICK" }, 504 { IS_DUP, 0, "DUPLICATE" }, 505 { IS_REDIRECT_OK, 0, "REDIRECT_OK" }, 506 { IS_NEED_NET_SYN, 0, "" }, 507 { IS_NO_AG, IS_NO_SUPER_AG, "NO_AG" }, 508 { IS_NO_SUPER_AG, 0, "NO_SUPER_AG" }, 509 { (IS_NO_RIPV1_IN 510 | IS_NO_RIPV2_IN 511 | IS_NO_RIPV1_OUT 512 | IS_NO_RIPV2_OUT), 0, "NO_RIP" }, 513 { (IS_NO_RIPV1_IN 514 | IS_NO_RIPV1_OUT), 0, "RIPV2" }, 515 { IS_NO_RIPV1_IN, 0, "NO_RIPV1_IN" }, 516 { IS_NO_RIPV2_IN, 0, "NO_RIPV2_IN" }, 517 { IS_NO_RIPV1_OUT, 0, "NO_RIPV1_OUT" }, 518 { IS_NO_RIPV2_OUT, 0, "NO_RIPV2_OUT" }, 519 { (IS_NO_ADV_IN 520 | IS_NO_SOL_OUT 521 | IS_NO_ADV_OUT), IS_BCAST_RDISC, "NO_RDISC" }, 522 { IS_NO_SOL_OUT, 0, "NO_SOLICIT" }, 523 { IS_SOL_OUT, 0, "SEND_SOLICIT" }, 524 { IS_NO_ADV_OUT, IS_BCAST_RDISC, "NO_RDISC_ADV" }, 525 { IS_ADV_OUT, 0, "RDISC_ADV" }, 526 { IS_BCAST_RDISC, 0, "BCAST_RDISC" }, 527 { IS_PM_RDISC, 0, "" }, 528 { 0, 0, "%#x"} 529 }; 530 531 static struct bits rs_bits[] = { 532 { RS_IF, 0, "IF" }, 533 { RS_NET_INT, RS_NET_SYN, "NET_INT" }, 534 { RS_NET_SYN, 0, "NET_SYN" }, 535 { RS_SUBNET, 0, "" }, 536 { RS_LOCAL, 0, "LOCAL" }, 537 { RS_MHOME, 0, "MHOME" }, 538 { RS_STATIC, 0, "STATIC" }, 539 { RS_RDISC, 0, "RDISC" }, 540 { 0, 0, "%#x"} 541 }; 542 543 544 static void 545 trace_bits(const struct bits *tbl, 546 u_int field, 547 int force) 548 { 549 u_int b; 550 char c; 551 552 if (force) { 553 (void)putc('<', ftrace); 554 c = 0; 555 } else { 556 c = '<'; 557 } 558 559 while (field != 0 560 && (b = tbl->bits_mask) != 0) { 561 if ((b & field) == b) { 562 if (tbl->bits_name[0] != '\0') { 563 if (c) 564 (void)putc(c, ftrace); 565 (void)fprintf(ftrace, "%s", tbl->bits_name); 566 c = '|'; 567 } 568 if (0 == (field &= ~(b | tbl->bits_clear))) 569 break; 570 } 571 tbl++; 572 } 573 if (field != 0 && tbl->bits_name != 0) { 574 if (c) 575 (void)putc(c, ftrace); 576 (void)fprintf(ftrace, tbl->bits_name, field); 577 c = '|'; 578 } 579 580 if (c != '<' || force) 581 (void)fputs("> ", ftrace); 582 } 583 584 585 char * 586 rtname(naddr dst, 587 naddr mask, 588 naddr gate) 589 { 590 static char buf[3*4+3+1+2+3 /* "xxx.xxx.xxx.xxx/xx-->" */ 591 +3*4+3+1]; /* "xxx.xxx.xxx.xxx" */ 592 int i; 593 594 i = snprintf(buf, sizeof(buf), "%-16s-->", addrname(dst, mask, 0)); 595 if (i < 0 || (size_t)i >= sizeof(buf)) 596 return buf; 597 (void)snprintf(&buf[i], sizeof(buf) - i, "%-*s", 15+20-MAX(20, i), 598 naddr_ntoa(gate)); 599 return buf; 600 } 601 602 603 static void 604 print_rts(struct rt_spare *rts, 605 int force_metric, /* -1=suppress, 0=default */ 606 int force_ifp, /* -1=suppress, 0=default */ 607 int force_router, /* -1=suppress, 0=default, 1=display */ 608 int force_tag, /* -1=suppress, 0=default, 1=display */ 609 int force_time) /* 0=suppress, 1=display */ 610 { 611 int i; 612 613 614 if (force_metric >= 0) 615 (void)fprintf(ftrace, "metric=%-2d ", rts->rts_metric); 616 if (force_ifp >= 0) 617 (void)fprintf(ftrace, "%s ", (rts->rts_ifp == 0 ? 618 "if?" : rts->rts_ifp->int_name)); 619 if (force_router > 0 620 || (force_router == 0 && rts->rts_router != rts->rts_gate)) 621 (void)fprintf(ftrace, "router=%s ", 622 naddr_ntoa(rts->rts_router)); 623 if (force_time > 0) 624 (void)fprintf(ftrace, "%s ", ts(rts->rts_time)); 625 if (force_tag > 0 626 || (force_tag == 0 && rts->rts_tag != 0)) 627 (void)fprintf(ftrace, "tag=%#x ", ntohs(rts->rts_tag)); 628 if (rts->rts_de_ag != 0) { 629 for (i = 1; (u_int)(1 << i) <= rts->rts_de_ag; i++) 630 continue; 631 (void)fprintf(ftrace, "de_ag=%d ", i); 632 } 633 634 } 635 636 637 void 638 trace_if(const char *act, 639 struct interface *ifp) 640 { 641 if (!TRACEACTIONS || ftrace == 0) 642 return; 643 644 lastlog(); 645 (void)fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name); 646 (void)fprintf(ftrace, "%-15s-->%-15s ", 647 naddr_ntoa(ifp->int_addr), 648 addrname(((ifp->int_if_flags & IFF_POINTOPOINT) 649 ? ifp->int_dstaddr 650 : htonl(ifp->int_net)), 651 ifp->int_mask, 1)); 652 if (ifp->int_metric != 0) 653 (void)fprintf(ftrace, "metric=%d ", ifp->int_metric); 654 if (ifp->int_adj_inmetric != 0) 655 (void)fprintf(ftrace, "adj_inmetric=%u ", 656 ifp->int_adj_inmetric); 657 if (ifp->int_adj_outmetric != 0) 658 (void)fprintf(ftrace, "adj_outmetric=%u ", 659 ifp->int_adj_outmetric); 660 if (!IS_RIP_OUT_OFF(ifp->int_state) 661 && ifp->int_d_metric != 0) 662 (void)fprintf(ftrace, "fake_default=%u ", ifp->int_d_metric); 663 trace_bits(if_bits, ifp->int_if_flags, 0); 664 trace_bits(is_bits, ifp->int_state, 0); 665 (void)fputc('\n',ftrace); 666 } 667 668 669 void 670 trace_upslot(struct rt_entry *rt, 671 struct rt_spare *rts, 672 struct rt_spare *new) 673 { 674 if (!TRACEACTIONS || ftrace == 0) 675 return; 676 677 if (rts->rts_gate == new->rts_gate 678 && rts->rts_router == new->rts_router 679 && rts->rts_metric == new->rts_metric 680 && rts->rts_tag == new->rts_tag 681 && rts->rts_de_ag == new->rts_de_ag) 682 return; 683 684 lastlog(); 685 if (new->rts_gate == 0) { 686 (void)fprintf(ftrace, "Del #%d %-35s ", 687 (int)(rts - rt->rt_spares), 688 rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate)); 689 print_rts(rts, 0,0,0,0, 690 (rts != rt->rt_spares 691 || AGE_RT(rt->rt_state,new->rts_ifp))); 692 693 } else if (rts->rts_gate != RIP_DEFAULT) { 694 (void)fprintf(ftrace, "Chg #%d %-35s ", 695 (int)(rts - rt->rt_spares), 696 rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate)); 697 print_rts(rts, 0,0, 698 rts->rts_gate != new->rts_gate, 699 rts->rts_tag != new->rts_tag, 700 rts != rt->rt_spares || AGE_RT(rt->rt_state, 701 rt->rt_ifp)); 702 703 (void)fprintf(ftrace, "\n %19s%-16s ", "", 704 (new->rts_gate != rts->rts_gate 705 ? naddr_ntoa(new->rts_gate) : "")); 706 print_rts(new, 707 -(new->rts_metric == rts->rts_metric), 708 -(new->rts_ifp == rts->rts_ifp), 709 0, 710 rts->rts_tag != new->rts_tag, 711 (new->rts_time != rts->rts_time 712 && (rts != rt->rt_spares 713 || AGE_RT(rt->rt_state, new->rts_ifp)))); 714 715 } else { 716 (void)fprintf(ftrace, "Add #%d %-35s ", 717 (int)(rts - rt->rt_spares), 718 rtname(rt->rt_dst, rt->rt_mask, new->rts_gate)); 719 print_rts(new, 0,0,0,0, 720 (rts != rt->rt_spares 721 || AGE_RT(rt->rt_state,new->rts_ifp))); 722 } 723 (void)fputc('\n',ftrace); 724 } 725 726 727 /* miscellaneous message checked by the caller 728 */ 729 void 730 trace_misc(const char *p, ...) 731 { 732 va_list args; 733 734 if (ftrace == 0) 735 return; 736 737 lastlog(); 738 va_start(args, p); 739 vfprintf(ftrace, p, args); 740 va_end(args); 741 (void)fputc('\n',ftrace); 742 } 743 744 745 /* display a message if tracing actions 746 */ 747 void 748 trace_act(const char *p, ...) 749 { 750 va_list args; 751 752 if (!TRACEACTIONS || ftrace == 0) 753 return; 754 755 lastlog(); 756 va_start(args, p); 757 vfprintf(ftrace, p, args); 758 va_end(args); 759 (void)fputc('\n',ftrace); 760 } 761 762 763 /* display a message if tracing packets 764 */ 765 void 766 trace_pkt(const char *p, ...) 767 { 768 va_list args; 769 770 if (!TRACEPACKETS || ftrace == 0) 771 return; 772 773 lastlog(); 774 va_start(args, p); 775 vfprintf(ftrace, p, args); 776 va_end(args); 777 (void)fputc('\n',ftrace); 778 } 779 780 781 void 782 trace_change(struct rt_entry *rt, 783 u_int state, 784 struct rt_spare *new, 785 const char *label) 786 { 787 if (ftrace == 0) 788 return; 789 790 if (rt->rt_metric == new->rts_metric 791 && rt->rt_gate == new->rts_gate 792 && rt->rt_router == new->rts_router 793 && rt->rt_state == state 794 && rt->rt_tag == new->rts_tag 795 && rt->rt_de_ag == new->rts_de_ag) 796 return; 797 798 lastlog(); 799 (void)fprintf(ftrace, "%s %-35s ", 800 label, 801 rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate)); 802 print_rts(rt->rt_spares, 803 0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp)); 804 trace_bits(rs_bits, rt->rt_state, rt->rt_state != state); 805 806 (void)fprintf(ftrace, "\n%*s %19s%-16s ", 807 (int)strlen(label), "", "", 808 (rt->rt_gate != new->rts_gate 809 ? naddr_ntoa(new->rts_gate) : "")); 810 print_rts(new, 811 -(new->rts_metric == rt->rt_metric), 812 -(new->rts_ifp == rt->rt_ifp), 813 0, 814 rt->rt_tag != new->rts_tag, 815 (rt->rt_time != new->rts_time 816 && AGE_RT(rt->rt_state,new->rts_ifp))); 817 if (rt->rt_state != state) 818 trace_bits(rs_bits, state, 1); 819 (void)fputc('\n',ftrace); 820 } 821 822 823 void 824 trace_add_del(const char * action, struct rt_entry *rt) 825 { 826 if (ftrace == 0) 827 return; 828 829 lastlog(); 830 (void)fprintf(ftrace, "%s %-35s ", 831 action, 832 rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate)); 833 print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp)); 834 trace_bits(rs_bits, rt->rt_state, 0); 835 (void)fputc('\n',ftrace); 836 } 837 838 839 /* ARGSUSED */ 840 static int 841 walk_trace(struct radix_node *rn, 842 struct walkarg *w UNUSED) 843 { 844 #define RT ((struct rt_entry *)rn) 845 struct rt_spare *rts; 846 int i; 847 848 (void)fprintf(ftrace, " %-35s ", 849 rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate)); 850 print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp)); 851 trace_bits(rs_bits, RT->rt_state, 0); 852 if (RT->rt_poison_time >= now_garbage 853 && RT->rt_poison_metric < RT->rt_metric) 854 (void)fprintf(ftrace, "pm=%d@%s", 855 RT->rt_poison_metric, ts(RT->rt_poison_time)); 856 857 rts = &RT->rt_spares[1]; 858 for (i = 1; i < NUM_SPARES; i++, rts++) { 859 if (rts->rts_gate != RIP_DEFAULT) { 860 (void)fprintf(ftrace,"\n #%d%15s%-16s ", 861 i, "", naddr_ntoa(rts->rts_gate)); 862 print_rts(rts, 0,0,0,0,1); 863 } 864 } 865 (void)fputc('\n',ftrace); 866 867 return 0; 868 } 869 870 871 static void 872 trace_dump(void) 873 { 874 struct interface *ifp; 875 876 if (ftrace == 0) 877 return; 878 lastlog(); 879 880 (void)fputs("current daemon state:\n", ftrace); 881 for (ifp = ifnet; ifp != 0; ifp = ifp->int_next) 882 trace_if("", ifp); 883 (void)rn_walktree(rhead, walk_trace, 0); 884 } 885 886 887 void 888 trace_rip(const char *dir1, const char *dir2, 889 struct sockaddr_in *who, 890 struct interface *ifp, 891 struct rip *msg, 892 int size) /* total size of message */ 893 { 894 struct netinfo *n, *lim; 895 # define NA ((struct netauth*)n) 896 int i, seen_route; 897 898 if (!TRACEPACKETS || ftrace == 0) 899 return; 900 901 lastlog(); 902 if (msg->rip_cmd >= RIPCMD_MAX 903 || msg->rip_vers == 0) { 904 (void)fprintf(ftrace, "%s bad RIPv%d cmd=%d %s" 905 " %s.%d size=%d\n", 906 dir1, msg->rip_vers, msg->rip_cmd, dir2, 907 naddr_ntoa(who->sin_addr.s_addr), 908 ntohs(who->sin_port), 909 size); 910 return; 911 } 912 913 (void)fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n", 914 dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2, 915 naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port), 916 ifp ? " via " : "", ifp ? ifp->int_name : ""); 917 if (!TRACECONTENTS) 918 return; 919 920 seen_route = 0; 921 switch (msg->rip_cmd) { 922 case RIPCMD_REQUEST: 923 case RIPCMD_RESPONSE: 924 n = msg->rip_nets; 925 lim = (struct netinfo *)((char*)msg + size); 926 for (; n < lim; n++) { 927 if (!seen_route 928 && n->n_family == RIP_AF_UNSPEC 929 && ntohl(n->n_metric) == HOPCNT_INFINITY 930 && msg->rip_cmd == RIPCMD_REQUEST 931 && (n+1 == lim 932 || (n+2 == lim 933 && (n+1)->n_family == RIP_AF_AUTH))) { 934 (void)fputs("\tQUERY ", ftrace); 935 if (n->n_dst != 0) 936 (void)fprintf(ftrace, "%s ", 937 naddr_ntoa(n->n_dst)); 938 if (n->n_mask != 0) 939 (void)fprintf(ftrace, "mask=%#x ", 940 (u_int)ntohl(n->n_mask)); 941 if (n->n_nhop != 0) 942 (void)fprintf(ftrace, "nhop=%s ", 943 naddr_ntoa(n->n_nhop)); 944 if (n->n_tag != 0) 945 (void)fprintf(ftrace, "tag=%#x ", 946 ntohs(n->n_tag)); 947 (void)fputc('\n',ftrace); 948 continue; 949 } 950 951 if (n->n_family == RIP_AF_AUTH) { 952 if (NA->a_type == RIP_AUTH_PW 953 && n == msg->rip_nets) { 954 (void)fprintf(ftrace, "\tPassword" 955 " Authentication:" 956 " \"%s\"\n", 957 qstring(NA->au.au_pw, 958 RIP_AUTH_PW_LEN)); 959 continue; 960 } 961 962 if (NA->a_type == RIP_AUTH_MD5 963 && n == msg->rip_nets) { 964 (void)fprintf(ftrace, 965 "\tMD5 Auth" 966 " pkt_len=%d KeyID=%u" 967 " auth_len=%d" 968 " seqno=%#x" 969 " rsvd=%#x,%#x\n", 970 ntohs(NA->au.a_md5.md5_pkt_len), 971 NA->au.a_md5.md5_keyid, 972 NA->au.a_md5.md5_auth_len, 973 (int)ntohl(NA->au.a_md5.md5_seqno), 974 (int)ntohs(NA->au.a_md5.rsvd[0]), 975 (int)ntohs(NA->au.a_md5.rsvd[1])); 976 continue; 977 } 978 (void)fprintf(ftrace, 979 "\tAuthentication type %d: ", 980 ntohs(NA->a_type)); 981 for (i = 0; 982 i < (int)sizeof(NA->au.au_pw); 983 i++) 984 (void)fprintf(ftrace, "%02x ", 985 NA->au.au_pw[i]); 986 (void)fputc('\n',ftrace); 987 continue; 988 } 989 990 seen_route = 1; 991 if (n->n_family != RIP_AF_INET) { 992 (void)fprintf(ftrace, 993 "\t(af %d) %-18s mask=%#x ", 994 ntohs(n->n_family), 995 naddr_ntoa(n->n_dst), 996 (u_int)ntohl(n->n_mask)); 997 } else if (msg->rip_vers == RIPv1) { 998 (void)fprintf(ftrace, "\t%-18s ", 999 addrname(n->n_dst, 1000 ntohl(n->n_mask), 1001 n->n_mask==0 ? 2 : 1)); 1002 } else { 1003 (void)fprintf(ftrace, "\t%-18s ", 1004 addrname(n->n_dst, 1005 ntohl(n->n_mask), 1006 n->n_mask==0 ? 2 : 0)); 1007 } 1008 (void)fprintf(ftrace, "metric=%-2d ", 1009 (u_int)ntohl(n->n_metric)); 1010 if (n->n_nhop != 0) 1011 (void)fprintf(ftrace, " nhop=%s ", 1012 naddr_ntoa(n->n_nhop)); 1013 if (n->n_tag != 0) 1014 (void)fprintf(ftrace, "tag=%#x", 1015 ntohs(n->n_tag)); 1016 (void)fputc('\n',ftrace); 1017 } 1018 if (size != (char *)n - (char *)msg) 1019 (void)fprintf(ftrace, "truncated record, len %d\n", 1020 size); 1021 break; 1022 1023 case RIPCMD_TRACEON: 1024 fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4, 1025 msg->rip_tracefile); 1026 break; 1027 1028 case RIPCMD_TRACEOFF: 1029 break; 1030 } 1031 } 1032