1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
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. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $FreeBSD$
32 */
33
34#define	RIPCMDS
35#include "defs.h"
36#include "pathnames.h"
37#include <sys/stat.h>
38#include <sys/signal.h>
39#include <fcntl.h>
40
41__RCSID("$FreeBSD$");
42
43
44
45int	tracelevel, new_tracelevel;
46FILE	*ftrace;			/* output trace file */
47static const char *sigtrace_pat = "%s";
48static char savetracename[PATH_MAX];
49char	inittracename[PATH_MAX];
50static int file_trace;			/* 1=tracing to file, not stdout */
51
52static void trace_dump(void);
53static void tmsg(const char *, ...) PATTRIB(1,2);
54
55
56/* convert string to printable characters
57 */
58static char *
59qstring(u_char *s, int len)
60{
61	static char buf[8*20+1];
62	char *p;
63	u_char *s2, c;
64
65
66	for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
67		c = *s++;
68		if (c == '\0') {
69			for (s2 = s+1; s2 < &s[len]; s2++) {
70				if (*s2 != '\0')
71					break;
72			}
73			if (s2 >= &s[len])
74			    goto exit;
75		}
76
77		if (c >= ' ' && c < 0x7f && c != '\\') {
78			*p++ = c;
79			continue;
80		}
81		*p++ = '\\';
82		switch (c) {
83		case '\\':
84			*p++ = '\\';
85			break;
86		case '\n':
87			*p++= 'n';
88			break;
89		case '\r':
90			*p++= 'r';
91			break;
92		case '\t':
93			*p++ = 't';
94			break;
95		case '\b':
96			*p++ = 'b';
97			break;
98		default:
99			p += sprintf(p,"%o",c);
100			break;
101		}
102	}
103exit:
104	*p = '\0';
105	return buf;
106}
107
108
109/* convert IP address to a string, but not into a single buffer
110 */
111char *
112naddr_ntoa(naddr a)
113{
114#define NUM_BUFS 4
115	static int bufno;
116	static struct {
117	    char    str[16];		/* xxx.xxx.xxx.xxx\0 */
118	} bufs[NUM_BUFS];
119	char *s;
120	struct in_addr addr;
121
122	addr.s_addr = a;
123	s = strcpy(bufs[bufno].str, inet_ntoa(addr));
124	bufno = (bufno+1) % NUM_BUFS;
125	return s;
126#undef NUM_BUFS
127}
128
129
130const char *
131saddr_ntoa(struct sockaddr *sa)
132{
133	return (sa == NULL) ? "?" : naddr_ntoa(S_ADDR(sa));
134}
135
136
137static char *
138ts(time_t secs) {
139	static char s[20];
140
141	secs += epoch.tv_sec;
142	memcpy(s, ctime(&secs)+11, 8);
143	s[8] = '\0';
144	return s;
145}
146
147
148/* On each event, display a time stamp.
149 * This assumes that 'now' is update once for each event, and
150 * that at least now.tv_usec changes.
151 */
152static struct timeval lastlog_time;
153
154void
155lastlog(void)
156{
157	if (lastlog_time.tv_sec != now.tv_sec
158	    || lastlog_time.tv_usec != now.tv_usec) {
159		(void)fprintf(ftrace, "-- %s --\n", ts(now.tv_sec));
160		lastlog_time = now;
161	}
162}
163
164
165static void
166tmsg(const char *p, ...)
167{
168	va_list args;
169
170	if (ftrace != NULL) {
171		lastlog();
172		va_start(args, p);
173		vfprintf(ftrace, p, args);
174		va_end(args);
175		(void)fputc('\n',ftrace);
176		fflush(ftrace);
177	}
178}
179
180
181void
182trace_close(int zap_stdio)
183{
184	int fd;
185
186
187	fflush(stdout);
188	fflush(stderr);
189
190	if (ftrace != NULL && zap_stdio) {
191		if (ftrace != stdout)
192			fclose(ftrace);
193		ftrace = NULL;
194		fd = open(_PATH_DEVNULL, O_RDWR);
195		if (fd < 0)
196			return;
197		if (isatty(STDIN_FILENO))
198			(void)dup2(fd, STDIN_FILENO);
199		if (isatty(STDOUT_FILENO))
200			(void)dup2(fd, STDOUT_FILENO);
201		if (isatty(STDERR_FILENO))
202			(void)dup2(fd, STDERR_FILENO);
203		(void)close(fd);
204	}
205	lastlog_time.tv_sec = 0;
206}
207
208
209void
210trace_flush(void)
211{
212	if (ftrace != NULL) {
213		fflush(ftrace);
214		if (ferror(ftrace))
215			trace_off("tracing off: %s", strerror(ferror(ftrace)));
216	}
217}
218
219
220void
221trace_off(const char *p, ...)
222{
223	va_list args;
224
225
226	if (ftrace != NULL) {
227		lastlog();
228		va_start(args, p);
229		vfprintf(ftrace, p, args);
230		va_end(args);
231		(void)fputc('\n',ftrace);
232	}
233	trace_close(file_trace);
234
235	new_tracelevel = tracelevel = 0;
236}
237
238
239/* log a change in tracing
240 */
241void
242tracelevel_msg(const char *pat,
243	       int dump)		/* -1=no dump, 0=default, 1=force */
244{
245	static const char * const off_msgs[MAX_TRACELEVEL] = {
246		"Tracing actions stopped",
247		"Tracing packets stopped",
248		"Tracing packet contents stopped",
249		"Tracing kernel changes stopped",
250	};
251	static const char * const on_msgs[MAX_TRACELEVEL] = {
252		"Tracing actions started",
253		"Tracing packets started",
254		"Tracing packet contents started",
255		"Tracing kernel changes started",
256	};
257	u_int old_tracelevel = tracelevel;
258
259
260	if (new_tracelevel < 0)
261		new_tracelevel = 0;
262	else if (new_tracelevel > MAX_TRACELEVEL)
263		new_tracelevel = MAX_TRACELEVEL;
264
265	if (new_tracelevel < tracelevel) {
266		if (new_tracelevel <= 0) {
267			trace_off(pat, off_msgs[0]);
268		} else do {
269			tmsg(pat, off_msgs[tracelevel]);
270		}
271		while (--tracelevel != new_tracelevel);
272
273	} else if (new_tracelevel > tracelevel) {
274		do {
275			tmsg(pat, on_msgs[tracelevel++]);
276		} while (tracelevel != new_tracelevel);
277	}
278
279	if (dump > 0
280	    || (dump == 0 && old_tracelevel == 0 && tracelevel != 0))
281		trace_dump();
282}
283
284
285void
286set_tracefile(const char *filename,
287	      const char *pat,
288	      int dump)			/* -1=no dump, 0=default, 1=force */
289{
290	struct stat stbuf;
291	FILE *n_ftrace;
292	const char *fn;
293
294
295	/* Allow a null filename to increase the level if the trace file
296	 * is already open or if coming from a trusted source, such as
297	 * a signal or the command line.
298	 */
299	if (filename == NULL || filename[0] == '\0') {
300		filename = NULL;
301		if (ftrace == NULL) {
302			if (inittracename[0] == '\0') {
303				msglog("missing trace file name");
304				return;
305			}
306			fn = inittracename;
307		} else {
308			fn = NULL;
309		}
310
311	} else if (!strcmp(filename,"dump/../table")) {
312		trace_dump();
313		return;
314
315	} else {
316		/* Allow the file specified with "-T file" to be reopened,
317		 * but require all other names specified over the net to
318		 * match the official path.  The path can specify a directory
319		 * in which the file is to be created.
320		 */
321		if (strcmp(filename, inittracename)
322#ifdef _PATH_TRACE
323		    && (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
324			|| strstr(filename,"../")
325			|| 0 > stat(_PATH_TRACE, &stbuf))
326#endif
327		    ) {
328			msglog("wrong trace file \"%s\"", filename);
329			return;
330		}
331
332		/* If the new tracefile exists, it must be a regular file.
333		 */
334		if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
335			msglog("wrong type (%#x) of trace file \"%s\"",
336			       stbuf.st_mode, filename);
337			return;
338		}
339
340		fn = filename;
341	}
342
343	if (fn != NULL) {
344		n_ftrace = fopen(fn, "a");
345		if (n_ftrace == NULL) {
346			msglog("failed to open trace file \"%s\" %s",
347			       fn, strerror(errno));
348			if (fn == inittracename)
349				inittracename[0] = '\0';
350			return;
351		}
352
353		tmsg("switch to trace file %s", fn);
354
355		trace_close(file_trace = 1);
356
357		if (fn != savetracename)
358			strncpy(savetracename, fn, sizeof(savetracename)-1);
359		ftrace = n_ftrace;
360
361		fflush(stdout);
362		fflush(stderr);
363		dup2(fileno(ftrace), STDOUT_FILENO);
364		dup2(fileno(ftrace), STDERR_FILENO);
365	}
366
367	if (new_tracelevel == 0 || filename == NULL)
368		new_tracelevel++;
369	tracelevel_msg(pat, dump != 0 ? dump : (filename != NULL));
370}
371
372
373/* ARGSUSED */
374void
375sigtrace_on(int s UNUSED)
376{
377	new_tracelevel++;
378	sigtrace_pat = "SIGUSR1: %s";
379}
380
381
382/* ARGSUSED */
383void
384sigtrace_off(int s UNUSED)
385{
386	new_tracelevel--;
387	sigtrace_pat = "SIGUSR2: %s";
388}
389
390
391/* Set tracing after a signal.
392 */
393void
394set_tracelevel(void)
395{
396	if (new_tracelevel == tracelevel)
397		return;
398
399	/* If tracing entirely off, and there was no tracefile specified
400	 * on the command line, then leave it off.
401	 */
402	if (new_tracelevel > tracelevel && ftrace == NULL) {
403		if (savetracename[0] != '\0') {
404			set_tracefile(savetracename,sigtrace_pat,0);
405		} else if (inittracename[0] != '\0') {
406				set_tracefile(inittracename,sigtrace_pat,0);
407		} else {
408			new_tracelevel = 0;
409			return;
410		}
411	} else {
412		tracelevel_msg(sigtrace_pat, 0);
413	}
414}
415
416
417/* display an address
418 */
419char *
420addrname(naddr	addr,			/* in network byte order */
421	 naddr	mask,
422	 int	force)			/* 0=show mask if nonstandard, */
423{					/*	1=always show mask, 2=never */
424#define NUM_BUFS 4
425	static int bufno;
426	static struct {
427	    char    str[15+20];
428	} bufs[NUM_BUFS];
429	char *s, *sp;
430	naddr dmask;
431	size_t l;
432	int i;
433
434	strlcpy(bufs[bufno].str, naddr_ntoa(addr), sizeof(bufs[bufno].str));
435	s = bufs[bufno].str;
436	l = sizeof(bufs[bufno].str);
437	bufno = (bufno+1) % NUM_BUFS;
438
439	if (force == 1 || (force == 0 && mask != std_mask(addr))) {
440		sp = &s[strlen(s)];
441
442		dmask = mask & -mask;
443		if (mask + dmask == 0) {
444			for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
445				continue;
446			(void)snprintf(sp, s + l - sp, "/%d", 32-i);
447
448		} else {
449			(void)snprintf(sp, s + l - sp, " (mask %#x)",
450			    (u_int)mask);
451		}
452	}
453
454	return s;
455#undef NUM_BUFS
456}
457
458
459/* display a bit-field
460 */
461struct bits {
462	u_int	bits_mask;
463	u_int	bits_clear;
464	const char *bits_name;
465};
466
467static const struct bits if_bits[] = {
468	{ IFF_LOOPBACK,		0,		"LOOPBACK" },
469	{ IFF_POINTOPOINT,	0,		"PT-TO-PT" },
470	{ 0,			0,		0}
471};
472
473static const struct bits is_bits[] = {
474	{ IS_ALIAS,		0,		"ALIAS" },
475	{ IS_SUBNET,		0,		"" },
476	{ IS_REMOTE,		(IS_NO_RDISC
477				 | IS_BCAST_RDISC), "REMOTE" },
478	{ IS_PASSIVE,		(IS_NO_RDISC
479				 | IS_NO_RIP
480				 | IS_NO_SUPER_AG
481				 | IS_PM_RDISC
482				 | IS_NO_AG),	"PASSIVE" },
483	{ IS_EXTERNAL,		0,		"EXTERNAL" },
484	{ IS_CHECKED,		0,		"" },
485	{ IS_ALL_HOSTS,		0,		"" },
486	{ IS_ALL_ROUTERS,	0,		"" },
487	{ IS_DISTRUST,		0,		"DISTRUST" },
488	{ IS_BROKE,		IS_SICK,	"BROKEN" },
489	{ IS_SICK,		0,		"SICK" },
490	{ IS_DUP,		0,		"DUPLICATE" },
491	{ IS_REDIRECT_OK,	0,		"REDIRECT_OK" },
492	{ IS_NEED_NET_SYN,	0,		"" },
493	{ IS_NO_AG,		IS_NO_SUPER_AG,	"NO_AG" },
494	{ IS_NO_SUPER_AG,	0,		"NO_SUPER_AG" },
495	{ (IS_NO_RIPV1_IN
496	   | IS_NO_RIPV2_IN
497	   | IS_NO_RIPV1_OUT
498	   | IS_NO_RIPV2_OUT),	0,		"NO_RIP" },
499	{ (IS_NO_RIPV1_IN
500	   | IS_NO_RIPV1_OUT),	0,		"RIPV2" },
501	{ IS_NO_RIPV1_IN,	0,		"NO_RIPV1_IN" },
502	{ IS_NO_RIPV2_IN,	0,		"NO_RIPV2_IN" },
503	{ IS_NO_RIPV1_OUT,	0,		"NO_RIPV1_OUT" },
504	{ IS_NO_RIPV2_OUT,	0,		"NO_RIPV2_OUT" },
505	{ (IS_NO_ADV_IN
506	   | IS_NO_SOL_OUT
507	   | IS_NO_ADV_OUT),	IS_BCAST_RDISC,	"NO_RDISC" },
508	{ IS_NO_SOL_OUT,	0,		"NO_SOLICIT" },
509	{ IS_SOL_OUT,		0,		"SEND_SOLICIT" },
510	{ IS_NO_ADV_OUT,	IS_BCAST_RDISC,	"NO_RDISC_ADV" },
511	{ IS_ADV_OUT,		0,		"RDISC_ADV" },
512	{ IS_BCAST_RDISC,	0,		"BCAST_RDISC" },
513	{ IS_PM_RDISC,		0,		"" },
514	{ 0,			0,		"%#x"}
515};
516
517static const struct bits rs_bits[] = {
518	{ RS_IF,		0,		"IF" },
519	{ RS_NET_INT,		RS_NET_SYN,	"NET_INT" },
520	{ RS_NET_SYN,		0,		"NET_SYN" },
521	{ RS_SUBNET,		0,		"" },
522	{ RS_LOCAL,		0,		"LOCAL" },
523	{ RS_MHOME,		0,		"MHOME" },
524	{ RS_STATIC,		0,		"STATIC" },
525	{ RS_RDISC,		0,		"RDISC" },
526	{ 0,			0,		"%#x"}
527};
528
529
530static void
531trace_bits(const struct bits *tbl,
532	   u_int field,
533	   int force)
534{
535	u_int b;
536	char c;
537
538	if (force) {
539		(void)putc('<', ftrace);
540		c = 0;
541	} else {
542		c = '<';
543	}
544
545	while (field != 0
546	       && (b = tbl->bits_mask) != 0) {
547		if ((b & field) == b) {
548			if (tbl->bits_name[0] != '\0') {
549				if (c)
550					(void)putc(c, ftrace);
551				(void)fprintf(ftrace, "%s", tbl->bits_name);
552				c = '|';
553			}
554			if (0 == (field &= ~(b | tbl->bits_clear)))
555				break;
556		}
557		tbl++;
558	}
559	if (field != 0 && tbl->bits_name != NULL) {
560		if (c)
561			(void)putc(c, ftrace);
562		(void)fprintf(ftrace, tbl->bits_name, field);
563		c = '|';
564	}
565
566	if (c != '<' || force)
567		(void)fputs("> ", ftrace);
568}
569
570
571char *
572rtname(naddr dst,
573       naddr mask,
574       naddr gate)
575{
576	static char buf[3*4+3+1+2+3	/* "xxx.xxx.xxx.xxx/xx-->" */
577			+3*4+3+1];	/* "xxx.xxx.xxx.xxx" */
578	int i;
579
580	i = sprintf(buf, "%-16s-->", addrname(dst, mask, 0));
581	(void)sprintf(&buf[i], "%-*s", 15+20-MAX(20,i), naddr_ntoa(gate));
582	return buf;
583}
584
585
586static void
587print_rts(struct rt_spare *rts,
588	  int force_metric,		/* -1=suppress, 0=default */
589	  int force_ifp,		/* -1=suppress, 0=default */
590	  int force_router,		/* -1=suppress, 0=default, 1=display */
591	  int force_tag,		/* -1=suppress, 0=default, 1=display */
592	  int force_time)		/* 0=suppress, 1=display */
593{
594	int i;
595
596
597	if (force_metric >= 0)
598		(void)fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
599	if (force_ifp >= 0)
600		(void)fprintf(ftrace, "%s ", (rts->rts_ifp == NULL ?
601					      "if?" : rts->rts_ifp->int_name));
602	if (force_router > 0
603	    || (force_router == 0 && rts->rts_router != rts->rts_gate))
604		(void)fprintf(ftrace, "router=%s ",
605			      naddr_ntoa(rts->rts_router));
606	if (force_time > 0)
607		(void)fprintf(ftrace, "%s ", ts(rts->rts_time));
608	if (force_tag > 0
609	    || (force_tag == 0 && rts->rts_tag != 0))
610		(void)fprintf(ftrace, "tag=%#x ", ntohs(rts->rts_tag));
611	if (rts->rts_de_ag != 0) {
612		for (i = 1; (u_int)(1 << i) <= rts->rts_de_ag; i++)
613			continue;
614		(void)fprintf(ftrace, "de_ag=%d ", i);
615	}
616
617}
618
619
620void
621trace_if(const char *act,
622	 struct interface *ifp)
623{
624	if (!TRACEACTIONS || ftrace == NULL)
625		return;
626
627	lastlog();
628	(void)fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
629	(void)fprintf(ftrace, "%-15s-->%-15s ",
630		      naddr_ntoa(ifp->int_addr),
631		      addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
632				? ifp->int_dstaddr
633				: htonl(ifp->int_net)),
634			       ifp->int_mask, 1));
635	if (ifp->int_metric != 0)
636		(void)fprintf(ftrace, "metric=%d ", ifp->int_metric);
637	if (ifp->int_adj_inmetric != 0)
638		(void)fprintf(ftrace, "adj_inmetric=%u ",
639			      ifp->int_adj_inmetric);
640	if (ifp->int_adj_outmetric != 0)
641		(void)fprintf(ftrace, "adj_outmetric=%u ",
642			      ifp->int_adj_outmetric);
643	if (!IS_RIP_OUT_OFF(ifp->int_state)
644	    && ifp->int_d_metric != 0)
645		(void)fprintf(ftrace, "fake_default=%u ", ifp->int_d_metric);
646	trace_bits(if_bits, ifp->int_if_flags, 0);
647	trace_bits(is_bits, ifp->int_state, 0);
648	(void)fputc('\n',ftrace);
649}
650
651
652void
653trace_upslot(struct rt_entry *rt,
654	     struct rt_spare *rts,
655	     struct rt_spare *new)
656{
657	if (!TRACEACTIONS || ftrace == NULL)
658		return;
659
660	if (rts->rts_gate == new->rts_gate
661	    && rts->rts_router == new->rts_router
662	    && rts->rts_metric == new->rts_metric
663	    && rts->rts_tag == new->rts_tag
664	    && rts->rts_de_ag == new->rts_de_ag)
665		return;
666
667	lastlog();
668	if (new->rts_gate == 0) {
669		(void)fprintf(ftrace, "Del #%d %-35s ",
670			      (int)(rts - rt->rt_spares),
671			      rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
672		print_rts(rts, 0,0,0,0,
673			  (rts != rt->rt_spares
674			   || AGE_RT(rt->rt_state,new->rts_ifp)));
675
676	} else if (rts->rts_gate != RIP_DEFAULT) {
677		(void)fprintf(ftrace, "Chg #%d %-35s ",
678			      (int)(rts - rt->rt_spares),
679			      rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
680		print_rts(rts, 0,0,
681			  rts->rts_gate != new->rts_gate,
682			  rts->rts_tag != new->rts_tag,
683			  rts != rt->rt_spares || AGE_RT(rt->rt_state,
684							rt->rt_ifp));
685
686		(void)fprintf(ftrace, "\n       %19s%-16s ", "",
687			      (new->rts_gate != rts->rts_gate
688			       ? naddr_ntoa(new->rts_gate) : ""));
689		print_rts(new,
690			  -(new->rts_metric == rts->rts_metric),
691			  -(new->rts_ifp == rts->rts_ifp),
692			  0,
693			  rts->rts_tag != new->rts_tag,
694			  (new->rts_time != rts->rts_time
695			   && (rts != rt->rt_spares
696			       || AGE_RT(rt->rt_state, new->rts_ifp))));
697
698	} else {
699		(void)fprintf(ftrace, "Add #%d %-35s ",
700			      (int)(rts - rt->rt_spares),
701			      rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
702		print_rts(new, 0,0,0,0,
703			  (rts != rt->rt_spares
704			   || AGE_RT(rt->rt_state,new->rts_ifp)));
705	}
706	(void)fputc('\n',ftrace);
707}
708
709
710/* miscellaneous message checked by the caller
711 */
712void
713trace_misc(const char *p, ...)
714{
715	va_list args;
716
717	if (ftrace == NULL)
718		return;
719
720	lastlog();
721	va_start(args, p);
722	vfprintf(ftrace, p, args);
723	va_end(args);
724	(void)fputc('\n',ftrace);
725}
726
727
728/* display a message if tracing actions
729 */
730void
731trace_act(const char *p, ...)
732{
733	va_list args;
734
735	if (!TRACEACTIONS || ftrace == NULL)
736		return;
737
738	lastlog();
739	va_start(args, p);
740	vfprintf(ftrace, p, args);
741	va_end(args);
742	(void)fputc('\n',ftrace);
743}
744
745
746/* display a message if tracing packets
747 */
748void
749trace_pkt(const char *p, ...)
750{
751	va_list args;
752
753	if (!TRACEPACKETS || ftrace == NULL)
754		return;
755
756	lastlog();
757	va_start(args, p);
758	vfprintf(ftrace, p, args);
759	va_end(args);
760	(void)fputc('\n',ftrace);
761}
762
763
764void
765trace_change(struct rt_entry *rt,
766	     u_int	state,
767	     struct	rt_spare *new,
768	     const char	*label)
769{
770	if (ftrace == NULL)
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
806void
807trace_add_del(const char * action, struct rt_entry *rt)
808{
809	if (ftrace == NULL)
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 */
823static int
824walk_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
854static void
855trace_dump(void)
856{
857	struct interface *ifp;
858
859	if (ftrace == NULL)
860		return;
861	lastlog();
862
863	(void)fputs("current daemon state:\n", ftrace);
864	LIST_FOREACH(ifp, &ifnet, int_list)
865		trace_if("", ifp);
866	(void)rn_walktree(rhead, walk_trace, 0);
867}
868
869
870void
871trace_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 == NULL)
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}
1015