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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: releng/10.3/sbin/routed/trace.c 190718 2009-04-05 17:33:07Z phk $
30 */
31
32#define	RIPCMDS
33#include "defs.h"
34#include "pathnames.h"
35#include <sys/stat.h>
36#include <sys/signal.h>
37#include <fcntl.h>
38
39#ifdef __NetBSD__
40__RCSID("$NetBSD$");
41#elif defined(__FreeBSD__)
42__RCSID("$FreeBSD: releng/10.3/sbin/routed/trace.c 190718 2009-04-05 17:33:07Z phk $");
43#else
44__RCSID("$Revision: 2.27 $");
45#ident "$Revision: 2.27 $"
46#endif
47
48
49#ifdef sgi
50/* use *stat64 for files on large file systems */
51#define stat	stat64
52#endif
53
54int	tracelevel, new_tracelevel;
55FILE	*ftrace;			/* output trace file */
56static const char *sigtrace_pat = "%s";
57static char savetracename[PATH_MAX];
58char	inittracename[PATH_MAX];
59static int file_trace;			/* 1=tracing to file, not stdout */
60
61static void trace_dump(void);
62static void tmsg(const char *, ...) PATTRIB(1,2);
63
64
65/* convert string to printable characters
66 */
67static char *
68qstring(u_char *s, int len)
69{
70	static char buf[8*20+1];
71	char *p;
72	u_char *s2, c;
73
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			p += sprintf(p,"%o",c);
109			break;
110		}
111	}
112exit:
113	*p = '\0';
114	return buf;
115}
116
117
118/* convert IP address to a string, but not into a single buffer
119 */
120char *
121naddr_ntoa(naddr a)
122{
123#define NUM_BUFS 4
124	static int bufno;
125	static struct {
126	    char    str[16];		/* xxx.xxx.xxx.xxx\0 */
127	} bufs[NUM_BUFS];
128	char *s;
129	struct in_addr addr;
130
131	addr.s_addr = a;
132	s = strcpy(bufs[bufno].str, inet_ntoa(addr));
133	bufno = (bufno+1) % NUM_BUFS;
134	return s;
135#undef NUM_BUFS
136}
137
138
139const char *
140saddr_ntoa(struct sockaddr *sa)
141{
142	return (sa == 0) ? "?" : naddr_ntoa(S_ADDR(sa));
143}
144
145
146static char *
147ts(time_t secs) {
148	static char s[20];
149
150	secs += epoch.tv_sec;
151#ifdef sgi
152	(void)cftime(s, "%T", &secs);
153#else
154	memcpy(s, ctime(&secs)+11, 8);
155	s[8] = '\0';
156#endif
157	return s;
158}
159
160
161/* On each event, display a time stamp.
162 * This assumes that 'now' is update once for each event, and
163 * that at least now.tv_usec changes.
164 */
165static struct timeval lastlog_time;
166
167void
168lastlog(void)
169{
170	if (lastlog_time.tv_sec != now.tv_sec
171	    || lastlog_time.tv_usec != now.tv_usec) {
172		(void)fprintf(ftrace, "-- %s --\n", ts(now.tv_sec));
173		lastlog_time = now;
174	}
175}
176
177
178static void
179tmsg(const char *p, ...)
180{
181	va_list args;
182
183	if (ftrace != 0) {
184		lastlog();
185		va_start(args, p);
186		vfprintf(ftrace, p, args);
187		va_end(args);
188		(void)fputc('\n',ftrace);
189		fflush(ftrace);
190	}
191}
192
193
194void
195trace_close(int zap_stdio)
196{
197	int fd;
198
199
200	fflush(stdout);
201	fflush(stderr);
202
203	if (ftrace != 0 && zap_stdio) {
204		if (ftrace != stdout)
205			fclose(ftrace);
206		ftrace = 0;
207		fd = open(_PATH_DEVNULL, O_RDWR);
208		if (isatty(STDIN_FILENO))
209			(void)dup2(fd, STDIN_FILENO);
210		if (isatty(STDOUT_FILENO))
211			(void)dup2(fd, STDOUT_FILENO);
212		if (isatty(STDERR_FILENO))
213			(void)dup2(fd, STDERR_FILENO);
214		(void)close(fd);
215	}
216	lastlog_time.tv_sec = 0;
217}
218
219
220void
221trace_flush(void)
222{
223	if (ftrace != 0) {
224		fflush(ftrace);
225		if (ferror(ftrace))
226			trace_off("tracing off: %s", strerror(ferror(ftrace)));
227	}
228}
229
230
231void
232trace_off(const char *p, ...)
233{
234	va_list args;
235
236
237	if (ftrace != 0) {
238		lastlog();
239		va_start(args, p);
240		vfprintf(ftrace, p, args);
241		va_end(args);
242		(void)fputc('\n',ftrace);
243	}
244	trace_close(file_trace);
245
246	new_tracelevel = tracelevel = 0;
247}
248
249
250/* log a change in tracing
251 */
252void
253tracelevel_msg(const char *pat,
254	       int dump)		/* -1=no dump, 0=default, 1=force */
255{
256	static const char * const off_msgs[MAX_TRACELEVEL] = {
257		"Tracing actions stopped",
258		"Tracing packets stopped",
259		"Tracing packet contents stopped",
260		"Tracing kernel changes stopped",
261	};
262	static const char * const on_msgs[MAX_TRACELEVEL] = {
263		"Tracing actions started",
264		"Tracing packets started",
265		"Tracing packet contents started",
266		"Tracing kernel changes started",
267	};
268	u_int old_tracelevel = tracelevel;
269
270
271	if (new_tracelevel < 0)
272		new_tracelevel = 0;
273	else if (new_tracelevel > MAX_TRACELEVEL)
274		new_tracelevel = MAX_TRACELEVEL;
275
276	if (new_tracelevel < tracelevel) {
277		if (new_tracelevel <= 0) {
278			trace_off(pat, off_msgs[0]);
279		} else do {
280			tmsg(pat, off_msgs[tracelevel]);
281		}
282		while (--tracelevel != new_tracelevel);
283
284	} else if (new_tracelevel > tracelevel) {
285		do {
286			tmsg(pat, on_msgs[tracelevel++]);
287		} while (tracelevel != new_tracelevel);
288	}
289
290	if (dump > 0
291	    || (dump == 0 && old_tracelevel == 0 && tracelevel != 0))
292		trace_dump();
293}
294
295
296void
297set_tracefile(const char *filename,
298	      const char *pat,
299	      int dump)			/* -1=no dump, 0=default, 1=force */
300{
301	struct stat stbuf;
302	FILE *n_ftrace;
303	const char *fn;
304
305
306	/* Allow a null filename to increase the level if the trace file
307	 * is already open or if coming from a trusted source, such as
308	 * a signal or the command line.
309	 */
310	if (filename == 0 || filename[0] == '\0') {
311		filename = 0;
312		if (ftrace == 0) {
313			if (inittracename[0] == '\0') {
314				msglog("missing trace file name");
315				return;
316			}
317			fn = inittracename;
318		} else {
319			fn = 0;
320		}
321
322	} else if (!strcmp(filename,"dump/../table")) {
323		trace_dump();
324		return;
325
326	} else {
327		/* Allow the file specified with "-T file" to be reopened,
328		 * but require all other names specified over the net to
329		 * match the official path.  The path can specify a directory
330		 * in which the file is to be created.
331		 */
332		if (strcmp(filename, inittracename)
333#ifdef _PATH_TRACE
334		    && (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
335			|| strstr(filename,"../")
336			|| 0 > stat(_PATH_TRACE, &stbuf))
337#endif
338		    ) {
339			msglog("wrong trace file \"%s\"", filename);
340			return;
341		}
342
343		/* If the new tracefile exists, it must be a regular file.
344		 */
345		if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
346			msglog("wrong type (%#x) of trace file \"%s\"",
347			       stbuf.st_mode, filename);
348			return;
349		}
350
351		fn = filename;
352	}
353
354	if (fn != 0) {
355		n_ftrace = fopen(fn, "a");
356		if (n_ftrace == 0) {
357			msglog("failed to open trace file \"%s\" %s",
358			       fn, strerror(errno));
359			if (fn == inittracename)
360				inittracename[0] = '\0';
361			return;
362		}
363
364		tmsg("switch to trace file %s", fn);
365
366		trace_close(file_trace = 1);
367
368		if (fn != savetracename)
369			strncpy(savetracename, fn, sizeof(savetracename)-1);
370		ftrace = n_ftrace;
371
372		fflush(stdout);
373		fflush(stderr);
374		dup2(fileno(ftrace), STDOUT_FILENO);
375		dup2(fileno(ftrace), STDERR_FILENO);
376	}
377
378	if (new_tracelevel == 0 || filename == 0)
379		new_tracelevel++;
380	tracelevel_msg(pat, dump != 0 ? dump : (filename != 0));
381}
382
383
384/* ARGSUSED */
385void
386sigtrace_on(int s UNUSED)
387{
388	new_tracelevel++;
389	sigtrace_pat = "SIGUSR1: %s";
390}
391
392
393/* ARGSUSED */
394void
395sigtrace_off(int s UNUSED)
396{
397	new_tracelevel--;
398	sigtrace_pat = "SIGUSR2: %s";
399}
400
401
402/* Set tracing after a signal.
403 */
404void
405set_tracelevel(void)
406{
407	if (new_tracelevel == tracelevel)
408		return;
409
410	/* If tracing entirely off, and there was no tracefile specified
411	 * on the command line, then leave it off.
412	 */
413	if (new_tracelevel > tracelevel && ftrace == 0) {
414		if (savetracename[0] != '\0') {
415			set_tracefile(savetracename,sigtrace_pat,0);
416		} else if (inittracename[0] != '\0') {
417				set_tracefile(inittracename,sigtrace_pat,0);
418		} else {
419			new_tracelevel = 0;
420			return;
421		}
422	} else {
423		tracelevel_msg(sigtrace_pat, 0);
424	}
425}
426
427
428/* display an address
429 */
430char *
431addrname(naddr	addr,			/* in network byte order */
432	 naddr	mask,
433	 int	force)			/* 0=show mask if nonstandard, */
434{					/*	1=always show mask, 2=never */
435#define NUM_BUFS 4
436	static int bufno;
437	static struct {
438	    char    str[15+20];
439	} bufs[NUM_BUFS];
440	char *s, *sp;
441	naddr dmask;
442	int i;
443
444	s = strcpy(bufs[bufno].str, naddr_ntoa(addr));
445	bufno = (bufno+1) % NUM_BUFS;
446
447	if (force == 1 || (force == 0 && mask != std_mask(addr))) {
448		sp = &s[strlen(s)];
449
450		dmask = mask & -mask;
451		if (mask + dmask == 0) {
452			for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
453				continue;
454			(void)sprintf(sp, "/%d", 32-i);
455
456		} else {
457			(void)sprintf(sp, " (mask %#x)", (u_int)mask);
458		}
459	}
460
461	return s;
462#undef NUM_BUFS
463}
464
465
466/* display a bit-field
467 */
468struct bits {
469	u_int	bits_mask;
470	u_int	bits_clear;
471	const char *bits_name;
472};
473
474static const struct bits if_bits[] = {
475	{ IFF_LOOPBACK,		0,		"LOOPBACK" },
476	{ IFF_POINTOPOINT,	0,		"PT-TO-PT" },
477	{ 0,			0,		0}
478};
479
480static const struct bits is_bits[] = {
481	{ IS_ALIAS,		0,		"ALIAS" },
482	{ IS_SUBNET,		0,		"" },
483	{ IS_REMOTE,		(IS_NO_RDISC
484				 | IS_BCAST_RDISC), "REMOTE" },
485	{ IS_PASSIVE,		(IS_NO_RDISC
486				 | IS_NO_RIP
487				 | IS_NO_SUPER_AG
488				 | IS_PM_RDISC
489				 | IS_NO_AG),	"PASSIVE" },
490	{ IS_EXTERNAL,		0,		"EXTERNAL" },
491	{ IS_CHECKED,		0,		"" },
492	{ IS_ALL_HOSTS,		0,		"" },
493	{ IS_ALL_ROUTERS,	0,		"" },
494	{ IS_DISTRUST,		0,		"DISTRUST" },
495	{ IS_BROKE,		IS_SICK,	"BROKEN" },
496	{ IS_SICK,		0,		"SICK" },
497	{ IS_DUP,		0,		"DUPLICATE" },
498	{ IS_REDIRECT_OK,	0,		"REDIRECT_OK" },
499	{ IS_NEED_NET_SYN,	0,		"" },
500	{ IS_NO_AG,		IS_NO_SUPER_AG,	"NO_AG" },
501	{ IS_NO_SUPER_AG,	0,		"NO_SUPER_AG" },
502	{ (IS_NO_RIPV1_IN
503	   | IS_NO_RIPV2_IN
504	   | IS_NO_RIPV1_OUT
505	   | IS_NO_RIPV2_OUT),	0,		"NO_RIP" },
506	{ (IS_NO_RIPV1_IN
507	   | IS_NO_RIPV1_OUT),	0,		"RIPV2" },
508	{ IS_NO_RIPV1_IN,	0,		"NO_RIPV1_IN" },
509	{ IS_NO_RIPV2_IN,	0,		"NO_RIPV2_IN" },
510	{ IS_NO_RIPV1_OUT,	0,		"NO_RIPV1_OUT" },
511	{ IS_NO_RIPV2_OUT,	0,		"NO_RIPV2_OUT" },
512	{ (IS_NO_ADV_IN
513	   | IS_NO_SOL_OUT
514	   | IS_NO_ADV_OUT),	IS_BCAST_RDISC,	"NO_RDISC" },
515	{ IS_NO_SOL_OUT,	0,		"NO_SOLICIT" },
516	{ IS_SOL_OUT,		0,		"SEND_SOLICIT" },
517	{ IS_NO_ADV_OUT,	IS_BCAST_RDISC,	"NO_RDISC_ADV" },
518	{ IS_ADV_OUT,		0,		"RDISC_ADV" },
519	{ IS_BCAST_RDISC,	0,		"BCAST_RDISC" },
520	{ IS_PM_RDISC,		0,		"" },
521	{ 0,			0,		"%#x"}
522};
523
524static const struct bits rs_bits[] = {
525	{ RS_IF,		0,		"IF" },
526	{ RS_NET_INT,		RS_NET_SYN,	"NET_INT" },
527	{ RS_NET_SYN,		0,		"NET_SYN" },
528	{ RS_SUBNET,		0,		"" },
529	{ RS_LOCAL,		0,		"LOCAL" },
530	{ RS_MHOME,		0,		"MHOME" },
531	{ RS_STATIC,		0,		"STATIC" },
532	{ RS_RDISC,		0,		"RDISC" },
533	{ 0,			0,		"%#x"}
534};
535
536
537static void
538trace_bits(const struct bits *tbl,
539	   u_int field,
540	   int force)
541{
542	u_int b;
543	char c;
544
545	if (force) {
546		(void)putc('<', ftrace);
547		c = 0;
548	} else {
549		c = '<';
550	}
551
552	while (field != 0
553	       && (b = tbl->bits_mask) != 0) {
554		if ((b & field) == b) {
555			if (tbl->bits_name[0] != '\0') {
556				if (c)
557					(void)putc(c, ftrace);
558				(void)fprintf(ftrace, "%s", tbl->bits_name);
559				c = '|';
560			}
561			if (0 == (field &= ~(b | tbl->bits_clear)))
562				break;
563		}
564		tbl++;
565	}
566	if (field != 0 && tbl->bits_name != 0) {
567		if (c)
568			(void)putc(c, ftrace);
569		(void)fprintf(ftrace, tbl->bits_name, field);
570		c = '|';
571	}
572
573	if (c != '<' || force)
574		(void)fputs("> ", ftrace);
575}
576
577
578char *
579rtname(naddr dst,
580       naddr mask,
581       naddr gate)
582{
583	static char buf[3*4+3+1+2+3	/* "xxx.xxx.xxx.xxx/xx-->" */
584			+3*4+3+1];	/* "xxx.xxx.xxx.xxx" */
585	int i;
586
587	i = sprintf(buf, "%-16s-->", addrname(dst, mask, 0));
588	(void)sprintf(&buf[i], "%-*s", 15+20-MAX(20,i), naddr_ntoa(gate));
589	return buf;
590}
591
592
593static void
594print_rts(struct rt_spare *rts,
595	  int force_metric,		/* -1=suppress, 0=default */
596	  int force_ifp,		/* -1=suppress, 0=default */
597	  int force_router,		/* -1=suppress, 0=default, 1=display */
598	  int force_tag,		/* -1=suppress, 0=default, 1=display */
599	  int force_time)		/* 0=suppress, 1=display */
600{
601	int i;
602
603
604	if (force_metric >= 0)
605		(void)fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
606	if (force_ifp >= 0)
607		(void)fprintf(ftrace, "%s ", (rts->rts_ifp == 0 ?
608					      "if?" : rts->rts_ifp->int_name));
609	if (force_router > 0
610	    || (force_router == 0 && rts->rts_router != rts->rts_gate))
611		(void)fprintf(ftrace, "router=%s ",
612			      naddr_ntoa(rts->rts_router));
613	if (force_time > 0)
614		(void)fprintf(ftrace, "%s ", ts(rts->rts_time));
615	if (force_tag > 0
616	    || (force_tag == 0 && rts->rts_tag != 0))
617		(void)fprintf(ftrace, "tag=%#x ", ntohs(rts->rts_tag));
618	if (rts->rts_de_ag != 0) {
619		for (i = 1; (u_int)(1 << i) <= rts->rts_de_ag; i++)
620			continue;
621		(void)fprintf(ftrace, "de_ag=%d ", i);
622	}
623
624}
625
626
627void
628trace_if(const char *act,
629	 struct interface *ifp)
630{
631	if (!TRACEACTIONS || ftrace == 0)
632		return;
633
634	lastlog();
635	(void)fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
636	(void)fprintf(ftrace, "%-15s-->%-15s ",
637		      naddr_ntoa(ifp->int_addr),
638		      addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
639				? ifp->int_dstaddr
640				: htonl(ifp->int_net)),
641			       ifp->int_mask, 1));
642	if (ifp->int_metric != 0)
643		(void)fprintf(ftrace, "metric=%d ", ifp->int_metric);
644	if (ifp->int_adj_inmetric != 0)
645		(void)fprintf(ftrace, "adj_inmetric=%u ",
646			      ifp->int_adj_inmetric);
647	if (ifp->int_adj_outmetric != 0)
648		(void)fprintf(ftrace, "adj_outmetric=%u ",
649			      ifp->int_adj_outmetric);
650	if (!IS_RIP_OUT_OFF(ifp->int_state)
651	    && ifp->int_d_metric != 0)
652		(void)fprintf(ftrace, "fake_default=%u ", ifp->int_d_metric);
653	trace_bits(if_bits, ifp->int_if_flags, 0);
654	trace_bits(is_bits, ifp->int_state, 0);
655	(void)fputc('\n',ftrace);
656}
657
658
659void
660trace_upslot(struct rt_entry *rt,
661	     struct rt_spare *rts,
662	     struct rt_spare *new)
663{
664	if (!TRACEACTIONS || ftrace == 0)
665		return;
666
667	if (rts->rts_gate == new->rts_gate
668	    && rts->rts_router == new->rts_router
669	    && rts->rts_metric == new->rts_metric
670	    && rts->rts_tag == new->rts_tag
671	    && rts->rts_de_ag == new->rts_de_ag)
672		return;
673
674	lastlog();
675	if (new->rts_gate == 0) {
676		(void)fprintf(ftrace, "Del #%d %-35s ",
677			      (int)(rts - rt->rt_spares),
678			      rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
679		print_rts(rts, 0,0,0,0,
680			  (rts != rt->rt_spares
681			   || AGE_RT(rt->rt_state,new->rts_ifp)));
682
683	} else if (rts->rts_gate != RIP_DEFAULT) {
684		(void)fprintf(ftrace, "Chg #%d %-35s ",
685			      (int)(rts - rt->rt_spares),
686			      rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
687		print_rts(rts, 0,0,
688			  rts->rts_gate != new->rts_gate,
689			  rts->rts_tag != new->rts_tag,
690			  rts != rt->rt_spares || AGE_RT(rt->rt_state,
691							rt->rt_ifp));
692
693		(void)fprintf(ftrace, "\n       %19s%-16s ", "",
694			      (new->rts_gate != rts->rts_gate
695			       ? naddr_ntoa(new->rts_gate) : ""));
696		print_rts(new,
697			  -(new->rts_metric == rts->rts_metric),
698			  -(new->rts_ifp == rts->rts_ifp),
699			  0,
700			  rts->rts_tag != new->rts_tag,
701			  (new->rts_time != rts->rts_time
702			   && (rts != rt->rt_spares
703			       || AGE_RT(rt->rt_state, new->rts_ifp))));
704
705	} else {
706		(void)fprintf(ftrace, "Add #%d %-35s ",
707			      (int)(rts - rt->rt_spares),
708			      rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
709		print_rts(new, 0,0,0,0,
710			  (rts != rt->rt_spares
711			   || AGE_RT(rt->rt_state,new->rts_ifp)));
712	}
713	(void)fputc('\n',ftrace);
714}
715
716
717/* miscellaneous message checked by the caller
718 */
719void
720trace_misc(const char *p, ...)
721{
722	va_list args;
723
724	if (ftrace == 0)
725		return;
726
727	lastlog();
728	va_start(args, p);
729	vfprintf(ftrace, p, args);
730	va_end(args);
731	(void)fputc('\n',ftrace);
732}
733
734
735/* display a message if tracing actions
736 */
737void
738trace_act(const char *p, ...)
739{
740	va_list args;
741
742	if (!TRACEACTIONS || ftrace == 0)
743		return;
744
745	lastlog();
746	va_start(args, p);
747	vfprintf(ftrace, p, args);
748	va_end(args);
749	(void)fputc('\n',ftrace);
750}
751
752
753/* display a message if tracing packets
754 */
755void
756trace_pkt(const char *p, ...)
757{
758	va_list args;
759
760	if (!TRACEPACKETS || ftrace == 0)
761		return;
762
763	lastlog();
764	va_start(args, p);
765	vfprintf(ftrace, p, args);
766	va_end(args);
767	(void)fputc('\n',ftrace);
768}
769
770
771void
772trace_change(struct rt_entry *rt,
773	     u_int	state,
774	     struct	rt_spare *new,
775	     const char	*label)
776{
777	if (ftrace == 0)
778		return;
779
780	if (rt->rt_metric == new->rts_metric
781	    && rt->rt_gate == new->rts_gate
782	    && rt->rt_router == new->rts_router
783	    && rt->rt_state == state
784	    && rt->rt_tag == new->rts_tag
785	    && rt->rt_de_ag == new->rts_de_ag)
786		return;
787
788	lastlog();
789	(void)fprintf(ftrace, "%s %-35s ",
790		      label,
791		      rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
792	print_rts(rt->rt_spares,
793		  0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
794	trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
795
796	(void)fprintf(ftrace, "\n%*s %19s%-16s ",
797		      (int)strlen(label), "", "",
798		      (rt->rt_gate != new->rts_gate
799		       ? naddr_ntoa(new->rts_gate) : ""));
800	print_rts(new,
801		  -(new->rts_metric == rt->rt_metric),
802		  -(new->rts_ifp == rt->rt_ifp),
803		  0,
804		  rt->rt_tag != new->rts_tag,
805		  (rt->rt_time != new->rts_time
806		   && AGE_RT(rt->rt_state,new->rts_ifp)));
807	if (rt->rt_state != state)
808		trace_bits(rs_bits, state, 1);
809	(void)fputc('\n',ftrace);
810}
811
812
813void
814trace_add_del(const char * action, struct rt_entry *rt)
815{
816	if (ftrace == 0)
817		return;
818
819	lastlog();
820	(void)fprintf(ftrace, "%s    %-35s ",
821		      action,
822		      rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
823	print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
824	trace_bits(rs_bits, rt->rt_state, 0);
825	(void)fputc('\n',ftrace);
826}
827
828
829/* ARGSUSED */
830static int
831walk_trace(struct radix_node *rn,
832	   struct walkarg *w UNUSED)
833{
834#define RT ((struct rt_entry *)rn)
835	struct rt_spare *rts;
836	int i;
837
838	(void)fprintf(ftrace, "  %-35s ",
839		      rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
840	print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp));
841	trace_bits(rs_bits, RT->rt_state, 0);
842	if (RT->rt_poison_time >= now_garbage
843	    && RT->rt_poison_metric < RT->rt_metric)
844		(void)fprintf(ftrace, "pm=%d@%s",
845			      RT->rt_poison_metric, ts(RT->rt_poison_time));
846
847	rts = &RT->rt_spares[1];
848	for (i = 1; i < NUM_SPARES; i++, rts++) {
849		if (rts->rts_gate != RIP_DEFAULT) {
850			(void)fprintf(ftrace,"\n    #%d%15s%-16s ",
851				      i, "", naddr_ntoa(rts->rts_gate));
852			print_rts(rts, 0,0,0,0,1);
853		}
854	}
855	(void)fputc('\n',ftrace);
856
857	return 0;
858}
859
860
861static void
862trace_dump(void)
863{
864	struct interface *ifp;
865
866	if (ftrace == 0)
867		return;
868	lastlog();
869
870	(void)fputs("current daemon state:\n", ftrace);
871	LIST_FOREACH(ifp, &ifnet, int_list)
872		trace_if("", ifp);
873	(void)rn_walktree(rhead, walk_trace, 0);
874}
875
876
877void
878trace_rip(const char *dir1, const char *dir2,
879	  struct sockaddr_in *who,
880	  struct interface *ifp,
881	  struct rip *msg,
882	  int size)			/* total size of message */
883{
884	struct netinfo *n, *lim;
885#	define NA ((struct netauth*)n)
886	int i, seen_route;
887
888	if (!TRACEPACKETS || ftrace == 0)
889		return;
890
891	lastlog();
892	if (msg->rip_cmd >= RIPCMD_MAX
893	    || msg->rip_vers == 0) {
894		(void)fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
895			      " %s.%d size=%d\n",
896			      dir1, msg->rip_vers, msg->rip_cmd, dir2,
897			      naddr_ntoa(who->sin_addr.s_addr),
898			      ntohs(who->sin_port),
899			      size);
900		return;
901	}
902
903	(void)fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
904		      dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
905		      naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
906		      ifp ? " via " : "", ifp ? ifp->int_name : "");
907	if (!TRACECONTENTS)
908		return;
909
910	seen_route = 0;
911	switch (msg->rip_cmd) {
912	case RIPCMD_REQUEST:
913	case RIPCMD_RESPONSE:
914		n = msg->rip_nets;
915		lim = (struct netinfo *)((char*)msg + size);
916		for (; n < lim; n++) {
917			if (!seen_route
918			    && n->n_family == RIP_AF_UNSPEC
919			    && ntohl(n->n_metric) == HOPCNT_INFINITY
920			    && msg->rip_cmd == RIPCMD_REQUEST
921			    && (n+1 == lim
922				|| (n+2 == lim
923				    && (n+1)->n_family == RIP_AF_AUTH))) {
924				(void)fputs("\tQUERY ", ftrace);
925				if (n->n_dst != 0)
926					(void)fprintf(ftrace, "%s ",
927						      naddr_ntoa(n->n_dst));
928				if (n->n_mask != 0)
929					(void)fprintf(ftrace, "mask=%#x ",
930						      (u_int)ntohl(n->n_mask));
931				if (n->n_nhop != 0)
932					(void)fprintf(ftrace, "nhop=%s ",
933						      naddr_ntoa(n->n_nhop));
934				if (n->n_tag != 0)
935					(void)fprintf(ftrace, "tag=%#x ",
936						      ntohs(n->n_tag));
937				(void)fputc('\n',ftrace);
938				continue;
939			}
940
941			if (n->n_family == RIP_AF_AUTH) {
942				if (NA->a_type == RIP_AUTH_PW
943				    && n == msg->rip_nets) {
944					(void)fprintf(ftrace, "\tPassword"
945						      " Authentication:"
946						      " \"%s\"\n",
947						      qstring(NA->au.au_pw,
948							  RIP_AUTH_PW_LEN));
949					continue;
950				}
951
952				if (NA->a_type == RIP_AUTH_MD5
953				    && n == msg->rip_nets) {
954					(void)fprintf(ftrace,
955						      "\tMD5 Auth"
956						      " pkt_len=%d KeyID=%u"
957						      " auth_len=%d"
958						      " seqno=%#x"
959						      " rsvd=%#x,%#x\n",
960					    ntohs(NA->au.a_md5.md5_pkt_len),
961					    NA->au.a_md5.md5_keyid,
962					    NA->au.a_md5.md5_auth_len,
963					    (int)ntohl(NA->au.a_md5.md5_seqno),
964					    (int)ntohs(NA->au.a_md5.rsvd[0]),
965					    (int)ntohs(NA->au.a_md5.rsvd[1]));
966					continue;
967				}
968				(void)fprintf(ftrace,
969					      "\tAuthentication type %d: ",
970					      ntohs(NA->a_type));
971				for (i = 0;
972				     i < (int)sizeof(NA->au.au_pw);
973				     i++)
974					(void)fprintf(ftrace, "%02x ",
975						      NA->au.au_pw[i]);
976				(void)fputc('\n',ftrace);
977				continue;
978			}
979
980			seen_route = 1;
981			if (n->n_family != RIP_AF_INET) {
982				(void)fprintf(ftrace,
983					      "\t(af %d) %-18s mask=%#x ",
984					      ntohs(n->n_family),
985					      naddr_ntoa(n->n_dst),
986					      (u_int)ntohl(n->n_mask));
987			} else if (msg->rip_vers == RIPv1) {
988				(void)fprintf(ftrace, "\t%-18s ",
989					      addrname(n->n_dst,
990						       ntohl(n->n_mask),
991						       n->n_mask==0 ? 2 : 1));
992			} else {
993				(void)fprintf(ftrace, "\t%-18s ",
994					      addrname(n->n_dst,
995						       ntohl(n->n_mask),
996						       n->n_mask==0 ? 2 : 0));
997			}
998			(void)fprintf(ftrace, "metric=%-2d ",
999				      (u_int)ntohl(n->n_metric));
1000			if (n->n_nhop != 0)
1001				(void)fprintf(ftrace, " nhop=%s ",
1002					      naddr_ntoa(n->n_nhop));
1003			if (n->n_tag != 0)
1004				(void)fprintf(ftrace, "tag=%#x",
1005					      ntohs(n->n_tag));
1006			(void)fputc('\n',ftrace);
1007		}
1008		if (size != (char *)n - (char *)msg)
1009			(void)fprintf(ftrace, "truncated record, len %d\n",
1010				size);
1011		break;
1012
1013	case RIPCMD_TRACEON:
1014		fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
1015			msg->rip_tracefile);
1016		break;
1017
1018	case RIPCMD_TRACEOFF:
1019		break;
1020	}
1021}
1022