1/*	$NetBSD: trace.c,v 1.31 2006/03/22 02:23:11 christos 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 1.31 2006/03/22 02:23:11 christos Exp $");
45#elif defined(__FreeBSD__)
46__RCSID("$FreeBSD$");
47#else
48__RCSID("Revision: 2.27 ");
49#ident "Revision: 2.27 "
50#endif
51
52
53#ifdef sgi
54/* use *stat64 for files on large filesystems */
55#define stat	stat64
56#endif
57
58#define	NRECORDS	50		/* size of circular trace buffer */
59
60int	tracelevel, new_tracelevel;
61FILE	*ftrace = stdout;		/* output trace file */
62static const char *sigtrace_pat = "%s";
63static char savetracename[MAXPATHLEN+1];
64char	inittracename[MAXPATHLEN+1];
65int	file_trace;			/* 1=tracing to file, not stdout */
66
67static void trace_dump(void);
68static void tmsg(const char *, ...) PATTRIB(1,2);
69
70
71/* convert string to printable characters
72 */
73static char *
74qstring(u_char *s, int len)
75{
76	static char buf[8*20+1];
77	char *p;
78	u_char *s2, c;
79	int n;
80
81	for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
82		c = *s++;
83		if (c == '\0') {
84			for (s2 = s+1; s2 < &s[len]; s2++) {
85				if (*s2 != '\0')
86					break;
87			}
88			if (s2 >= &s[len])
89			    goto exit;
90		}
91
92		if (c >= ' ' && c < 0x7f && c != '\\') {
93			*p++ = c;
94			continue;
95		}
96		*p++ = '\\';
97		switch (c) {
98		case '\\':
99			*p++ = '\\';
100			break;
101		case '\n':
102			*p++= 'n';
103			break;
104		case '\r':
105			*p++= 'r';
106			break;
107		case '\t':
108			*p++ = 't';
109			break;
110		case '\b':
111			*p++ = 'b';
112			break;
113		default:
114			n = snprintf(p, sizeof(buf) - (p - buf), "%o", c);
115			if (n <= 0)
116				goto exit;
117			p += n;
118			break;
119		}
120	}
121exit:
122	*p = '\0';
123	return buf;
124}
125
126
127/* convert IP address to a string, but not into a single buffer
128 */
129char *
130naddr_ntoa(naddr a)
131{
132#define NUM_BUFS 4
133	static int bufno;
134	static struct {
135	    char    str[16];		/* xxx.xxx.xxx.xxx\0 */
136	} bufs[NUM_BUFS];
137	char *s;
138	struct in_addr addr;
139
140	addr.s_addr = a;
141	strlcpy(bufs[bufno].str, inet_ntoa(addr), sizeof(bufs[bufno].str));
142	s = bufs[bufno].str;
143	bufno = (bufno+1) % NUM_BUFS;
144	return s;
145#undef NUM_BUFS
146}
147
148
149const char *
150saddr_ntoa(const struct sockaddr *sa)
151{
152	return (sa == 0) ? "?" : naddr_ntoa(S_ADDR(sa));
153}
154
155
156static char *
157ts(time_t secs) {
158	static char s[20];
159
160	secs += epoch.tv_sec;
161#ifdef sgi
162	(void)cftime(s, "%T", &secs);
163#else
164	memcpy(s, ctime(&secs)+11, 8);
165	s[8] = '\0';
166#endif
167	return s;
168}
169
170
171/* On each event, display a time stamp.
172 * This assumes that 'now' is update once for each event, and
173 * that at least now.tv_usec changes.
174 */
175static struct timeval lastlog_time;
176
177void
178lastlog(void)
179{
180	if (lastlog_time.tv_sec != now.tv_sec
181	    || lastlog_time.tv_usec != now.tv_usec) {
182		(void)fprintf(ftrace, "-- %s --\n", ts(now.tv_sec));
183		lastlog_time = now;
184	}
185}
186
187
188static void
189tmsg(const char *p, ...)
190{
191	va_list args;
192
193	if (ftrace != 0) {
194		lastlog();
195		va_start(args, p);
196		vfprintf(ftrace, p, args);
197		va_end(args);
198		(void)fputc('\n',ftrace);
199		fflush(ftrace);
200	}
201}
202
203
204void
205trace_close(int zap_stdio)
206{
207	int fd;
208
209
210	fflush(stdout);
211	fflush(stderr);
212
213	if (ftrace != 0 && zap_stdio) {
214		if (ftrace != stdout)
215			fclose(ftrace);
216		ftrace = 0;
217		fd = open(_PATH_DEVNULL, O_RDWR);
218		if (fd == -1)
219			return;
220		if (isatty(STDIN_FILENO))
221			(void)dup2(fd, STDIN_FILENO);
222		if (isatty(STDOUT_FILENO))
223			(void)dup2(fd, STDOUT_FILENO);
224		if (isatty(STDERR_FILENO))
225			(void)dup2(fd, STDERR_FILENO);
226		(void)close(fd);
227	}
228	lastlog_time.tv_sec = 0;
229}
230
231
232void
233trace_flush(void)
234{
235	if (ftrace != 0) {
236		fflush(ftrace);
237		if (ferror(ftrace))
238			trace_off("tracing off: %s", strerror(ferror(ftrace)));
239	}
240}
241
242
243void
244trace_off(const char *p, ...)
245{
246	va_list args;
247
248
249	if (ftrace != 0) {
250		lastlog();
251		va_start(args, p);
252		vfprintf(ftrace, p, args);
253		va_end(args);
254		(void)fputc('\n',ftrace);
255	}
256	trace_close(file_trace);
257
258	new_tracelevel = tracelevel = 0;
259}
260
261
262/* log a change in tracing
263 */
264void
265tracelevel_msg(const char *pat,
266	       int dump)		/* -1=no dump, 0=default, 1=force */
267{
268	static const char *off_msgs[MAX_TRACELEVEL] = {
269		"Tracing actions stopped",
270		"Tracing packets stopped",
271		"Tracing packet contents stopped",
272		"Tracing kernel changes stopped",
273	};
274	static const char *on_msgs[MAX_TRACELEVEL] = {
275		"Tracing actions started",
276		"Tracing packets started",
277		"Tracing packet contents started",
278		"Tracing kernel changes started",
279	};
280	u_int old_tracelevel = tracelevel;
281
282
283	if (new_tracelevel < 0)
284		new_tracelevel = 0;
285	else if (new_tracelevel > MAX_TRACELEVEL)
286		new_tracelevel = MAX_TRACELEVEL;
287
288	if (new_tracelevel < tracelevel) {
289		if (new_tracelevel <= 0) {
290			trace_off(pat, off_msgs[0]);
291		} else do {
292			tmsg(pat, off_msgs[tracelevel]);
293		}
294		while (--tracelevel != new_tracelevel);
295
296	} else if (new_tracelevel > tracelevel) {
297		do {
298			tmsg(pat, on_msgs[tracelevel++]);
299		} while (tracelevel != new_tracelevel);
300	}
301
302	if (dump > 0
303	    || (dump == 0 && old_tracelevel == 0 && tracelevel != 0))
304		trace_dump();
305}
306
307
308void
309set_tracefile(const char *filename,
310	      const char *pat,
311	      int dump)			/* -1=no dump, 0=default, 1=force */
312{
313	struct stat stbuf;
314	FILE *n_ftrace;
315	const char *fn;
316
317
318	/* Allow a null filename to increase the level if the trace file
319	 * is already open or if coming from a trusted source, such as
320	 * a signal or the command line.
321	 */
322	if (filename == 0 || filename[0] == '\0') {
323		filename = 0;
324		if (ftrace == 0) {
325			if (inittracename[0] == '\0') {
326				msglog("missing trace file name");
327				return;
328			}
329			fn = inittracename;
330		} else {
331			fn = 0;
332		}
333
334	} else if (!strcmp(filename,"dump/../table")) {
335		trace_dump();
336		return;
337
338	} else {
339		/* Allow the file specified with "-T file" to be reopened,
340		 * but require all other names specified over the net to
341		 * match the official path.  The path can specify a directory
342		 * in which the file is to be created.
343		 */
344		if (strcmp(filename, inittracename)
345#ifdef _PATH_TRACE
346		    && (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
347			|| strstr(filename,"../")
348			|| 0 > stat(_PATH_TRACE, &stbuf))
349#endif
350		    ) {
351			msglog("wrong trace file \"%s\"", filename);
352			return;
353		}
354
355		/* If the new tracefile exists, it must be a regular file.
356		 */
357		if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
358			msglog("wrong type (%#x) of trace file \"%s\"",
359			       stbuf.st_mode, filename);
360			return;
361		}
362
363		fn = filename;
364	}
365
366	if (fn != 0) {
367		n_ftrace = fopen(fn, "a");
368		if (n_ftrace == 0) {
369			msglog("failed to open trace file \"%s\" %s",
370			       fn, strerror(errno));
371			if (fn == inittracename)
372				inittracename[0] = '\0';
373			return;
374		}
375
376		tmsg("switch to trace file %s", fn);
377
378		trace_close(file_trace = 1);
379
380		if (fn != savetracename)
381			strlcpy(savetracename, fn, sizeof(savetracename));
382		ftrace = n_ftrace;
383
384		fflush(stdout);
385		fflush(stderr);
386		dup2(fileno(ftrace), STDOUT_FILENO);
387		dup2(fileno(ftrace), STDERR_FILENO);
388	}
389
390	if (new_tracelevel == 0 || filename == 0)
391		new_tracelevel++;
392	tracelevel_msg(pat, dump != 0 ? dump : (filename != 0));
393}
394
395
396/* ARGSUSED */
397void
398sigtrace_on(int s UNUSED)
399{
400	new_tracelevel++;
401	sigtrace_pat = "SIGUSR1: %s";
402}
403
404
405/* ARGSUSED */
406void
407sigtrace_off(int s UNUSED)
408{
409	new_tracelevel--;
410	sigtrace_pat = "SIGUSR2: %s";
411}
412
413
414/* Set tracing after a signal.
415 */
416void
417set_tracelevel(void)
418{
419	if (new_tracelevel == tracelevel)
420		return;
421
422	/* If tracing entirely off, and there was no tracefile specified
423	 * on the command line, then leave it off.
424	 */
425	if (new_tracelevel > tracelevel && ftrace == 0) {
426		if (savetracename[0] != '\0') {
427			set_tracefile(savetracename,sigtrace_pat,0);
428		} else if (inittracename[0] != '\0') {
429				set_tracefile(inittracename,sigtrace_pat,0);
430		} else {
431			new_tracelevel = 0;
432			return;
433		}
434	} else {
435		tracelevel_msg(sigtrace_pat, 0);
436	}
437}
438
439
440/* display an address
441 */
442char *
443addrname(naddr	addr,			/* in network byte order */
444	 naddr	mask,
445	 int	force)			/* 0=show mask if nonstandard, */
446{					/*	1=always show mask, 2=never */
447#define NUM_BUFS 4
448	static int bufno;
449	static struct {
450	    char    str[15+20];
451	} bufs[NUM_BUFS];
452	char *s, *sp;
453	naddr dmask;
454	size_t l;
455	int i;
456
457	strlcpy(bufs[bufno].str, naddr_ntoa(addr), sizeof(bufs[bufno].str));
458	s = bufs[bufno].str;
459	l = sizeof(bufs[bufno].str);
460	bufno = (bufno+1) % NUM_BUFS;
461
462	if (force == 1 || (force == 0 && mask != std_mask(addr))) {
463		sp = &s[strlen(s)];
464
465		dmask = mask & -mask;
466		if (mask + dmask == 0) {
467			for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
468				continue;
469			(void)snprintf(sp, s + l - sp, "/%d", 32-i);
470
471		} else {
472			(void)snprintf(sp, s + l - sp, " (mask %#x)",
473			    (u_int)mask);
474		}
475	}
476
477	return s;
478#undef NUM_BUFS
479}
480
481
482/* display a bit-field
483 */
484struct bits {
485	u_int	bits_mask;
486	u_int	bits_clear;
487	const char *bits_name;
488};
489
490static struct bits if_bits[] = {
491	{ IFF_LOOPBACK,		0,		"LOOPBACK" },
492	{ IFF_POINTOPOINT,	0,		"PT-TO-PT" },
493	{ 0,			0,		0}
494};
495
496static struct bits is_bits[] = {
497	{ IS_ALIAS,		0,		"ALIAS" },
498	{ IS_SUBNET,		0,		"" },
499	{ IS_REMOTE,		(IS_NO_RDISC
500				 | IS_BCAST_RDISC), "REMOTE" },
501	{ IS_PASSIVE,		(IS_NO_RDISC
502				 | IS_NO_RIP
503				 | IS_NO_SUPER_AG
504				 | IS_PM_RDISC
505				 | IS_NO_AG),	"PASSIVE" },
506	{ IS_EXTERNAL,		0,		"EXTERNAL" },
507	{ IS_CHECKED,		0,		"" },
508	{ IS_ALL_HOSTS,		0,		"" },
509	{ IS_ALL_ROUTERS,	0,		"" },
510	{ IS_DISTRUST,		0,		"DISTRUST" },
511	{ IS_BROKE,		IS_SICK,	"BROKEN" },
512	{ IS_SICK,		0,		"SICK" },
513	{ IS_DUP,		0,		"DUPLICATE" },
514	{ IS_REDIRECT_OK,	0,		"REDIRECT_OK" },
515	{ IS_NEED_NET_SYN,	0,		"" },
516	{ IS_NO_AG,		IS_NO_SUPER_AG,	"NO_AG" },
517	{ IS_NO_SUPER_AG,	0,		"NO_SUPER_AG" },
518	{ (IS_NO_RIPV1_IN
519	   | IS_NO_RIPV2_IN
520	   | IS_NO_RIPV1_OUT
521	   | IS_NO_RIPV2_OUT),	0,		"NO_RIP" },
522	{ (IS_NO_RIPV1_IN
523	   | IS_NO_RIPV1_OUT),	0,		"RIPV2" },
524	{ IS_NO_RIPV1_IN,	0,		"NO_RIPV1_IN" },
525	{ IS_NO_RIPV2_IN,	0,		"NO_RIPV2_IN" },
526	{ IS_NO_RIPV1_OUT,	0,		"NO_RIPV1_OUT" },
527	{ IS_NO_RIPV2_OUT,	0,		"NO_RIPV2_OUT" },
528	{ (IS_NO_ADV_IN
529	   | IS_NO_SOL_OUT
530	   | IS_NO_ADV_OUT),	IS_BCAST_RDISC,	"NO_RDISC" },
531	{ IS_NO_SOL_OUT,	0,		"NO_SOLICIT" },
532	{ IS_SOL_OUT,		0,		"SEND_SOLICIT" },
533	{ IS_NO_ADV_OUT,	IS_BCAST_RDISC,	"NO_RDISC_ADV" },
534	{ IS_ADV_OUT,		0,		"RDISC_ADV" },
535	{ IS_BCAST_RDISC,	0,		"BCAST_RDISC" },
536	{ IS_PM_RDISC,		0,		"" },
537	{ 0,			0,		"%#x"}
538};
539
540static struct bits rs_bits[] = {
541	{ RS_IF,		0,		"IF" },
542	{ RS_NET_INT,		RS_NET_SYN,	"NET_INT" },
543	{ RS_NET_SYN,		0,		"NET_SYN" },
544	{ RS_SUBNET,		0,		"" },
545	{ RS_LOCAL,		0,		"LOCAL" },
546	{ RS_MHOME,		0,		"MHOME" },
547	{ RS_STATIC,		0,		"STATIC" },
548	{ RS_RDISC,		0,		"RDISC" },
549	{ 0,			0,		"%#x"}
550};
551
552
553static void
554trace_bits(const struct bits *tbl,
555	   u_int field,
556	   int force)
557{
558	u_int b;
559	char c;
560
561	if (force) {
562		(void)putc('<', ftrace);
563		c = 0;
564	} else {
565		c = '<';
566	}
567
568	while (field != 0
569	       && (b = tbl->bits_mask) != 0) {
570		if ((b & field) == b) {
571			if (tbl->bits_name[0] != '\0') {
572				if (c)
573					(void)putc(c, ftrace);
574				(void)fprintf(ftrace, "%s", tbl->bits_name);
575				c = '|';
576			}
577			if (0 == (field &= ~(b | tbl->bits_clear)))
578				break;
579		}
580		tbl++;
581	}
582	if (field != 0 && tbl->bits_name != 0) {
583		if (c)
584			(void)putc(c, ftrace);
585		(void)fprintf(ftrace, tbl->bits_name, field);
586		c = '|';
587	}
588
589	if (c != '<' || force)
590		(void)fputs("> ", ftrace);
591}
592
593
594char *
595rtname(naddr dst,
596       naddr mask,
597       naddr gate)
598{
599	static char buf[3*4+3+1+2+3	/* "xxx.xxx.xxx.xxx/xx-->" */
600			+3*4+3+1];	/* "xxx.xxx.xxx.xxx" */
601	int i;
602
603	i = snprintf(buf, sizeof(buf), "%-16s-->", addrname(dst, mask, 0));
604	if (i < 0 || (size_t)i >= sizeof(buf))
605		return buf;
606	(void)snprintf(&buf[i], sizeof(buf) - i, "%-*s", 15+20-MAX(20, i),
607	    naddr_ntoa(gate));
608	return buf;
609}
610
611
612static void
613print_rts(struct rt_spare *rts,
614	  int force_metric,		/* -1=suppress, 0=default */
615	  int force_ifp,		/* -1=suppress, 0=default */
616	  int force_router,		/* -1=suppress, 0=default, 1=display */
617	  int force_tag,		/* -1=suppress, 0=default, 1=display */
618	  int force_time)		/* 0=suppress, 1=display */
619{
620	int i;
621
622
623	if (force_metric >= 0)
624		(void)fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
625	if (force_ifp >= 0)
626		(void)fprintf(ftrace, "%s ", (rts->rts_ifp == 0 ?
627					      "if?" : rts->rts_ifp->int_name));
628	if (force_router > 0
629	    || (force_router == 0 && rts->rts_router != rts->rts_gate))
630		(void)fprintf(ftrace, "router=%s ",
631			      naddr_ntoa(rts->rts_router));
632	if (force_time > 0)
633		(void)fprintf(ftrace, "%s ", ts(rts->rts_time));
634	if (force_tag > 0
635	    || (force_tag == 0 && rts->rts_tag != 0))
636		(void)fprintf(ftrace, "tag=%#x ", ntohs(rts->rts_tag));
637	if (rts->rts_de_ag != 0) {
638		for (i = 1; (u_int)(1 << i) <= rts->rts_de_ag; i++)
639			continue;
640		(void)fprintf(ftrace, "de_ag=%d ", i);
641	}
642
643}
644
645
646void
647trace_if(const char *act,
648	 struct interface *ifp)
649{
650	if (!TRACEACTIONS || ftrace == 0)
651		return;
652
653	lastlog();
654	(void)fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
655	(void)fprintf(ftrace, "%-15s-->%-15s ",
656		      naddr_ntoa(ifp->int_addr),
657		      addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
658				? ifp->int_dstaddr
659				: htonl(ifp->int_net)),
660			       ifp->int_mask, 1));
661	if (ifp->int_metric != 0)
662		(void)fprintf(ftrace, "metric=%d ", ifp->int_metric);
663	if (ifp->int_adj_inmetric != 0)
664		(void)fprintf(ftrace, "adj_inmetric=%u ",
665			      ifp->int_adj_inmetric);
666	if (ifp->int_adj_outmetric != 0)
667		(void)fprintf(ftrace, "adj_outmetric=%u ",
668			      ifp->int_adj_outmetric);
669	if (!IS_RIP_OUT_OFF(ifp->int_state)
670	    && ifp->int_d_metric != 0)
671		(void)fprintf(ftrace, "fake_default=%u ", ifp->int_d_metric);
672	trace_bits(if_bits, ifp->int_if_flags, 0);
673	trace_bits(is_bits, ifp->int_state, 0);
674	(void)fputc('\n',ftrace);
675}
676
677
678void
679trace_upslot(struct rt_entry *rt,
680	     struct rt_spare *rts,
681	     struct rt_spare *new)
682{
683	if (!TRACEACTIONS || ftrace == 0)
684		return;
685
686	if (rts->rts_gate == new->rts_gate
687	    && rts->rts_router == new->rts_router
688	    && rts->rts_metric == new->rts_metric
689	    && rts->rts_tag == new->rts_tag
690	    && rts->rts_de_ag == new->rts_de_ag)
691		return;
692
693	lastlog();
694	if (new->rts_gate == 0) {
695		(void)fprintf(ftrace, "Del #%d %-35s ",
696			      (int)(rts - rt->rt_spares),
697			      rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
698		print_rts(rts, 0,0,0,0,
699			  (rts != rt->rt_spares
700			   || AGE_RT(rt->rt_state,new->rts_ifp)));
701
702	} else if (rts->rts_gate != RIP_DEFAULT) {
703		(void)fprintf(ftrace, "Chg #%d %-35s ",
704			      (int)(rts - rt->rt_spares),
705			      rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
706		print_rts(rts, 0,0,
707			  rts->rts_gate != new->rts_gate,
708			  rts->rts_tag != new->rts_tag,
709			  rts != rt->rt_spares || AGE_RT(rt->rt_state,
710							rt->rt_ifp));
711
712		(void)fprintf(ftrace, "\n       %19s%-16s ", "",
713			      (new->rts_gate != rts->rts_gate
714			       ? naddr_ntoa(new->rts_gate) : ""));
715		print_rts(new,
716			  -(new->rts_metric == rts->rts_metric),
717			  -(new->rts_ifp == rts->rts_ifp),
718			  0,
719			  rts->rts_tag != new->rts_tag,
720			  (new->rts_time != rts->rts_time
721			   && (rts != rt->rt_spares
722			       || AGE_RT(rt->rt_state, new->rts_ifp))));
723
724	} else {
725		(void)fprintf(ftrace, "Add #%d %-35s ",
726			      (int)(rts - rt->rt_spares),
727			      rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
728		print_rts(new, 0,0,0,0,
729			  (rts != rt->rt_spares
730			   || AGE_RT(rt->rt_state,new->rts_ifp)));
731	}
732	(void)fputc('\n',ftrace);
733}
734
735
736/* miscellaneous message checked by the caller
737 */
738void
739trace_misc(const char *p, ...)
740{
741	va_list args;
742
743	if (ftrace == 0)
744		return;
745
746	lastlog();
747	va_start(args, p);
748	vfprintf(ftrace, p, args);
749	va_end(args);
750	(void)fputc('\n',ftrace);
751}
752
753
754/* display a message if tracing actions
755 */
756void
757trace_act(const char *p, ...)
758{
759	va_list args;
760
761	if (!TRACEACTIONS || ftrace == 0)
762		return;
763
764	lastlog();
765	va_start(args, p);
766	vfprintf(ftrace, p, args);
767	va_end(args);
768	(void)fputc('\n',ftrace);
769}
770
771
772/* display a message if tracing packets
773 */
774void
775trace_pkt(const char *p, ...)
776{
777	va_list args;
778
779	if (!TRACEPACKETS || ftrace == 0)
780		return;
781
782	lastlog();
783	va_start(args, p);
784	vfprintf(ftrace, p, args);
785	va_end(args);
786	(void)fputc('\n',ftrace);
787}
788
789
790void
791trace_change(struct rt_entry *rt,
792	     u_int	state,
793	     struct	rt_spare *new,
794	     const char	*label)
795{
796	if (ftrace == 0)
797		return;
798
799	if (rt->rt_metric == new->rts_metric
800	    && rt->rt_gate == new->rts_gate
801	    && rt->rt_router == new->rts_router
802	    && rt->rt_state == state
803	    && rt->rt_tag == new->rts_tag
804	    && rt->rt_de_ag == new->rts_de_ag)
805		return;
806
807	lastlog();
808	(void)fprintf(ftrace, "%s %-35s ",
809		      label,
810		      rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
811	print_rts(rt->rt_spares,
812		  0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
813	trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
814
815	(void)fprintf(ftrace, "\n%*s %19s%-16s ",
816		      (int)strlen(label), "", "",
817		      (rt->rt_gate != new->rts_gate
818		       ? naddr_ntoa(new->rts_gate) : ""));
819	print_rts(new,
820		  -(new->rts_metric == rt->rt_metric),
821		  -(new->rts_ifp == rt->rt_ifp),
822		  0,
823		  rt->rt_tag != new->rts_tag,
824		  (rt->rt_time != new->rts_time
825		   && AGE_RT(rt->rt_state,new->rts_ifp)));
826	if (rt->rt_state != state)
827		trace_bits(rs_bits, state, 1);
828	(void)fputc('\n',ftrace);
829}
830
831
832void
833trace_add_del(const char * action, struct rt_entry *rt)
834{
835	if (ftrace == 0)
836		return;
837
838	lastlog();
839	(void)fprintf(ftrace, "%s    %-35s ",
840		      action,
841		      rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
842	print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
843	trace_bits(rs_bits, rt->rt_state, 0);
844	(void)fputc('\n',ftrace);
845}
846
847
848/* ARGSUSED */
849static int
850walk_trace(struct radix_node *rn,
851	   struct walkarg *w UNUSED)
852{
853#define RT ((struct rt_entry *)rn)
854	struct rt_spare *rts;
855	int i;
856
857	(void)fprintf(ftrace, "  %-35s ",
858		      rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
859	print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp));
860	trace_bits(rs_bits, RT->rt_state, 0);
861	if (RT->rt_poison_time >= now_garbage
862	    && RT->rt_poison_metric < RT->rt_metric)
863		(void)fprintf(ftrace, "pm=%d@%s",
864			      RT->rt_poison_metric, ts(RT->rt_poison_time));
865
866	rts = &RT->rt_spares[1];
867	for (i = 1; i < NUM_SPARES; i++, rts++) {
868		if (rts->rts_gate != RIP_DEFAULT) {
869			(void)fprintf(ftrace,"\n    #%d%15s%-16s ",
870				      i, "", naddr_ntoa(rts->rts_gate));
871			print_rts(rts, 0,0,0,0,1);
872		}
873	}
874	(void)fputc('\n',ftrace);
875
876	return 0;
877}
878
879
880static void
881trace_dump(void)
882{
883	struct interface *ifp;
884
885	if (ftrace == 0)
886		return;
887	lastlog();
888
889	(void)fputs("current daemon state:\n", ftrace);
890	for (ifp = ifnet; ifp != 0; ifp = ifp->int_next)
891		trace_if("", ifp);
892	(void)rn_walktree(rhead, walk_trace, 0);
893}
894
895
896void
897trace_rip(const char *dir1, const char *dir2,
898	  struct sockaddr_in *who,
899	  struct interface *ifp,
900	  struct rip *msg,
901	  int size)			/* total size of message */
902{
903	struct netinfo *n, *lim;
904#	define NA ((struct netauth*)n)
905	int i, seen_route;
906
907	if (!TRACEPACKETS || ftrace == 0)
908		return;
909
910	lastlog();
911	if (msg->rip_cmd >= RIPCMD_MAX
912	    || msg->rip_vers == 0) {
913		(void)fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
914			      " %s.%d size=%d\n",
915			      dir1, msg->rip_vers, msg->rip_cmd, dir2,
916			      naddr_ntoa(who->sin_addr.s_addr),
917			      ntohs(who->sin_port),
918			      size);
919		return;
920	}
921
922	(void)fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
923		      dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
924		      naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
925		      ifp ? " via " : "", ifp ? ifp->int_name : "");
926	if (!TRACECONTENTS)
927		return;
928
929	seen_route = 0;
930	switch (msg->rip_cmd) {
931	case RIPCMD_REQUEST:
932	case RIPCMD_RESPONSE:
933		n = msg->rip_nets;
934		lim = (struct netinfo *)((char*)msg + size);
935		for (; n < lim; n++) {
936			if (!seen_route
937			    && n->n_family == RIP_AF_UNSPEC
938			    && ntohl(n->n_metric) == HOPCNT_INFINITY
939			    && msg->rip_cmd == RIPCMD_REQUEST
940			    && (n+1 == lim
941				|| (n+2 == lim
942				    && (n+1)->n_family == RIP_AF_AUTH))) {
943				(void)fputs("\tQUERY ", ftrace);
944				if (n->n_dst != 0)
945					(void)fprintf(ftrace, "%s ",
946						      naddr_ntoa(n->n_dst));
947				if (n->n_mask != 0)
948					(void)fprintf(ftrace, "mask=%#x ",
949						      (u_int)ntohl(n->n_mask));
950				if (n->n_nhop != 0)
951					(void)fprintf(ftrace, "nhop=%s ",
952						      naddr_ntoa(n->n_nhop));
953				if (n->n_tag != 0)
954					(void)fprintf(ftrace, "tag=%#x ",
955						      ntohs(n->n_tag));
956				(void)fputc('\n',ftrace);
957				continue;
958			}
959
960			if (n->n_family == RIP_AF_AUTH) {
961				if (NA->a_type == RIP_AUTH_PW
962				    && n == msg->rip_nets) {
963					(void)fprintf(ftrace, "\tPassword"
964						      " Authentication:"
965						      " \"%s\"\n",
966						      qstring(NA->au.au_pw,
967							  RIP_AUTH_PW_LEN));
968					continue;
969				}
970
971				if (NA->a_type == RIP_AUTH_MD5
972				    && n == msg->rip_nets) {
973					(void)fprintf(ftrace,
974						      "\tMD5 Auth"
975						      " pkt_len=%d KeyID=%u"
976						      " auth_len=%d"
977						      " seqno=%#x"
978						      " rsvd=%#x,%#x\n",
979					    ntohs(NA->au.a_md5.md5_pkt_len),
980					    NA->au.a_md5.md5_keyid,
981					    NA->au.a_md5.md5_auth_len,
982					    (int)ntohl(NA->au.a_md5.md5_seqno),
983					    (int)ntohs(NA->au.a_md5.rsvd[0]),
984					    (int)ntohs(NA->au.a_md5.rsvd[1]));
985					continue;
986				}
987				(void)fprintf(ftrace,
988					      "\tAuthentication type %d: ",
989					      ntohs(NA->a_type));
990				for (i = 0;
991				     i < (int)sizeof(NA->au.au_pw);
992				     i++)
993					(void)fprintf(ftrace, "%02x ",
994						      NA->au.au_pw[i]);
995				(void)fputc('\n',ftrace);
996				continue;
997			}
998
999			seen_route = 1;
1000			if (n->n_family != RIP_AF_INET) {
1001				(void)fprintf(ftrace,
1002					      "\t(af %d) %-18s mask=%#x ",
1003					      ntohs(n->n_family),
1004					      naddr_ntoa(n->n_dst),
1005					      (u_int)ntohl(n->n_mask));
1006			} else if (msg->rip_vers == RIPv1) {
1007				(void)fprintf(ftrace, "\t%-18s ",
1008					      addrname(n->n_dst,
1009						       ntohl(n->n_mask),
1010						       n->n_mask==0 ? 2 : 1));
1011			} else {
1012				(void)fprintf(ftrace, "\t%-18s ",
1013					      addrname(n->n_dst,
1014						       ntohl(n->n_mask),
1015						       n->n_mask==0 ? 2 : 0));
1016			}
1017			(void)fprintf(ftrace, "metric=%-2d ",
1018				      (u_int)ntohl(n->n_metric));
1019			if (n->n_nhop != 0)
1020				(void)fprintf(ftrace, " nhop=%s ",
1021					      naddr_ntoa(n->n_nhop));
1022			if (n->n_tag != 0)
1023				(void)fprintf(ftrace, "tag=%#x",
1024					      ntohs(n->n_tag));
1025			(void)fputc('\n',ftrace);
1026		}
1027		if (size != (char *)n - (char *)msg)
1028			(void)fprintf(ftrace, "truncated record, len %d\n",
1029				size);
1030		break;
1031
1032	case RIPCMD_TRACEON:
1033		fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
1034			msg->rip_tracefile);
1035		break;
1036
1037	case RIPCMD_TRACEOFF:
1038		break;
1039	}
1040}
1041