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
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
40int	tracelevel, new_tracelevel;
41FILE	*ftrace;			/* output trace file */
42static const char *sigtrace_pat = "%s";
43static char savetracename[PATH_MAX];
44char	inittracename[PATH_MAX];
45static int file_trace;			/* 1=tracing to file, not stdout */
46
47static void trace_dump(void);
48static void tmsg(const char *, ...) PATTRIB(1,2);
49
50
51/* convert string to printable characters
52 */
53static char *
54qstring(u_char *s, int len)
55{
56	static char buf[8*20+1];
57	char *p;
58	u_char *s2, c;
59
60
61	for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
62		c = *s++;
63		if (c == '\0') {
64			for (s2 = s+1; s2 < &s[len]; s2++) {
65				if (*s2 != '\0')
66					break;
67			}
68			if (s2 >= &s[len])
69			    goto exit;
70		}
71
72		if (c >= ' ' && c < 0x7f && c != '\\') {
73			*p++ = c;
74			continue;
75		}
76		*p++ = '\\';
77		switch (c) {
78		case '\\':
79			*p++ = '\\';
80			break;
81		case '\n':
82			*p++= 'n';
83			break;
84		case '\r':
85			*p++= 'r';
86			break;
87		case '\t':
88			*p++ = 't';
89			break;
90		case '\b':
91			*p++ = 'b';
92			break;
93		default:
94			p += sprintf(p,"%o",c);
95			break;
96		}
97	}
98exit:
99	*p = '\0';
100	return buf;
101}
102
103
104/* convert IP address to a string, but not into a single buffer
105 */
106char *
107naddr_ntoa(naddr a)
108{
109#define NUM_BUFS 4
110	static int bufno;
111	static struct {
112	    char    str[16];		/* xxx.xxx.xxx.xxx\0 */
113	} bufs[NUM_BUFS];
114	char *s;
115	struct in_addr addr;
116
117	addr.s_addr = a;
118	s = strcpy(bufs[bufno].str, inet_ntoa(addr));
119	bufno = (bufno+1) % NUM_BUFS;
120	return s;
121#undef NUM_BUFS
122}
123
124
125const char *
126saddr_ntoa(struct sockaddr *sa)
127{
128	return (sa == NULL) ? "?" : naddr_ntoa(S_ADDR(sa));
129}
130
131
132static char *
133ts(time_t secs) {
134	static char s[20];
135
136	secs += epoch.tv_sec;
137	memcpy(s, ctime(&secs)+11, 8);
138	s[8] = '\0';
139	return s;
140}
141
142
143/* On each event, display a time stamp.
144 * This assumes that 'now' is update once for each event, and
145 * that at least now.tv_usec changes.
146 */
147static struct timeval lastlog_time;
148
149void
150lastlog(void)
151{
152	if (lastlog_time.tv_sec != now.tv_sec
153	    || lastlog_time.tv_usec != now.tv_usec) {
154		(void)fprintf(ftrace, "-- %s --\n", ts(now.tv_sec));
155		lastlog_time = now;
156	}
157}
158
159
160static void
161tmsg(const char *p, ...)
162{
163	va_list args;
164
165	if (ftrace != NULL) {
166		lastlog();
167		va_start(args, p);
168		vfprintf(ftrace, p, args);
169		va_end(args);
170		(void)fputc('\n',ftrace);
171		fflush(ftrace);
172	}
173}
174
175
176void
177trace_close(int zap_stdio)
178{
179	int fd;
180
181
182	fflush(stdout);
183	fflush(stderr);
184
185	if (ftrace != NULL && zap_stdio) {
186		if (ftrace != stdout)
187			fclose(ftrace);
188		ftrace = NULL;
189		fd = open(_PATH_DEVNULL, O_RDWR);
190		if (fd < 0)
191			return;
192		if (isatty(STDIN_FILENO))
193			(void)dup2(fd, STDIN_FILENO);
194		if (isatty(STDOUT_FILENO))
195			(void)dup2(fd, STDOUT_FILENO);
196		if (isatty(STDERR_FILENO))
197			(void)dup2(fd, STDERR_FILENO);
198		(void)close(fd);
199	}
200	lastlog_time.tv_sec = 0;
201}
202
203
204void
205trace_flush(void)
206{
207	if (ftrace != NULL) {
208		fflush(ftrace);
209		if (ferror(ftrace))
210			trace_off("tracing off: %s", strerror(ferror(ftrace)));
211	}
212}
213
214
215void
216trace_off(const char *p, ...)
217{
218	va_list args;
219
220
221	if (ftrace != NULL) {
222		lastlog();
223		va_start(args, p);
224		vfprintf(ftrace, p, args);
225		va_end(args);
226		(void)fputc('\n',ftrace);
227	}
228	trace_close(file_trace);
229
230	new_tracelevel = tracelevel = 0;
231}
232
233
234/* log a change in tracing
235 */
236void
237tracelevel_msg(const char *pat,
238	       int dump)		/* -1=no dump, 0=default, 1=force */
239{
240	static const char * const off_msgs[MAX_TRACELEVEL] = {
241		"Tracing actions stopped",
242		"Tracing packets stopped",
243		"Tracing packet contents stopped",
244		"Tracing kernel changes stopped",
245	};
246	static const char * const on_msgs[MAX_TRACELEVEL] = {
247		"Tracing actions started",
248		"Tracing packets started",
249		"Tracing packet contents started",
250		"Tracing kernel changes started",
251	};
252	u_int old_tracelevel = tracelevel;
253
254
255	if (new_tracelevel < 0)
256		new_tracelevel = 0;
257	else if (new_tracelevel > MAX_TRACELEVEL)
258		new_tracelevel = MAX_TRACELEVEL;
259
260	if (new_tracelevel < tracelevel) {
261		if (new_tracelevel <= 0) {
262			trace_off(pat, off_msgs[0]);
263		} else do {
264			tmsg(pat, off_msgs[tracelevel]);
265		}
266		while (--tracelevel != new_tracelevel);
267
268	} else if (new_tracelevel > tracelevel) {
269		do {
270			tmsg(pat, on_msgs[tracelevel++]);
271		} while (tracelevel != new_tracelevel);
272	}
273
274	if (dump > 0
275	    || (dump == 0 && old_tracelevel == 0 && tracelevel != 0))
276		trace_dump();
277}
278
279
280void
281set_tracefile(const char *filename,
282	      const char *pat,
283	      int dump)			/* -1=no dump, 0=default, 1=force */
284{
285	struct stat stbuf;
286	FILE *n_ftrace;
287	const char *fn;
288
289
290	/* Allow a null filename to increase the level if the trace file
291	 * is already open or if coming from a trusted source, such as
292	 * a signal or the command line.
293	 */
294	if (filename == NULL || filename[0] == '\0') {
295		filename = NULL;
296		if (ftrace == NULL) {
297			if (inittracename[0] == '\0') {
298				msglog("missing trace file name");
299				return;
300			}
301			fn = inittracename;
302		} else {
303			fn = NULL;
304		}
305
306	} else if (!strcmp(filename,"dump/../table")) {
307		trace_dump();
308		return;
309
310	} else {
311		/* Allow the file specified with "-T file" to be reopened,
312		 * but require all other names specified over the net to
313		 * match the official path.  The path can specify a directory
314		 * in which the file is to be created.
315		 */
316		if (strcmp(filename, inittracename)
317#ifdef _PATH_TRACE
318		    && (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
319			|| strstr(filename,"../")
320			|| 0 > stat(_PATH_TRACE, &stbuf))
321#endif
322		    ) {
323			msglog("wrong trace file \"%s\"", filename);
324			return;
325		}
326
327		/* If the new tracefile exists, it must be a regular file.
328		 */
329		if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
330			msglog("wrong type (%#x) of trace file \"%s\"",
331			       stbuf.st_mode, filename);
332			return;
333		}
334
335		fn = filename;
336	}
337
338	if (fn != NULL) {
339		n_ftrace = fopen(fn, "a");
340		if (n_ftrace == NULL) {
341			msglog("failed to open trace file \"%s\" %s",
342			       fn, strerror(errno));
343			if (fn == inittracename)
344				inittracename[0] = '\0';
345			return;
346		}
347
348		tmsg("switch to trace file %s", fn);
349
350		trace_close(file_trace = 1);
351
352		if (fn != savetracename)
353			strncpy(savetracename, fn, sizeof(savetracename)-1);
354		ftrace = n_ftrace;
355
356		fflush(stdout);
357		fflush(stderr);
358		dup2(fileno(ftrace), STDOUT_FILENO);
359		dup2(fileno(ftrace), STDERR_FILENO);
360	}
361
362	if (new_tracelevel == 0 || filename == NULL)
363		new_tracelevel++;
364	tracelevel_msg(pat, dump != 0 ? dump : (filename != NULL));
365}
366
367
368/* ARGSUSED */
369void
370sigtrace_on(int s UNUSED)
371{
372	new_tracelevel++;
373	sigtrace_pat = "SIGUSR1: %s";
374}
375
376
377/* ARGSUSED */
378void
379sigtrace_off(int s UNUSED)
380{
381	new_tracelevel--;
382	sigtrace_pat = "SIGUSR2: %s";
383}
384
385
386/* Set tracing after a signal.
387 */
388void
389set_tracelevel(void)
390{
391	if (new_tracelevel == tracelevel)
392		return;
393
394	/* If tracing entirely off, and there was no tracefile specified
395	 * on the command line, then leave it off.
396	 */
397	if (new_tracelevel > tracelevel && ftrace == NULL) {
398		if (savetracename[0] != '\0') {
399			set_tracefile(savetracename,sigtrace_pat,0);
400		} else if (inittracename[0] != '\0') {
401				set_tracefile(inittracename,sigtrace_pat,0);
402		} else {
403			new_tracelevel = 0;
404			return;
405		}
406	} else {
407		tracelevel_msg(sigtrace_pat, 0);
408	}
409}
410
411
412/* display an address
413 */
414char *
415addrname(naddr	addr,			/* in network byte order */
416	 naddr	mask,
417	 int	force)			/* 0=show mask if nonstandard, */
418{					/*	1=always show mask, 2=never */
419#define NUM_BUFS 4
420	static int bufno;
421	static struct {
422	    char    str[15+20];
423	} bufs[NUM_BUFS];
424	char *s, *sp;
425	naddr dmask;
426	size_t l;
427	int i;
428
429	strlcpy(bufs[bufno].str, naddr_ntoa(addr), sizeof(bufs[bufno].str));
430	s = bufs[bufno].str;
431	l = sizeof(bufs[bufno].str);
432	bufno = (bufno+1) % NUM_BUFS;
433
434	if (force == 1 || (force == 0 && mask != std_mask(addr))) {
435		sp = &s[strlen(s)];
436
437		dmask = mask & -mask;
438		if (mask + dmask == 0) {
439			for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
440				continue;
441			(void)snprintf(sp, s + l - sp, "/%d", 32-i);
442
443		} else {
444			(void)snprintf(sp, s + l - sp, " (mask %#x)",
445			    (u_int)mask);
446		}
447	}
448
449	return s;
450#undef NUM_BUFS
451}
452
453
454/* display a bit-field
455 */
456struct bits {
457	u_int	bits_mask;
458	u_int	bits_clear;
459	const char *bits_name;
460};
461
462static const struct bits if_bits[] = {
463	{ IFF_LOOPBACK,		0,		"LOOPBACK" },
464	{ IFF_POINTOPOINT,	0,		"PT-TO-PT" },
465	{ 0,			0,		0}
466};
467
468static const struct bits is_bits[] = {
469	{ IS_ALIAS,		0,		"ALIAS" },
470	{ IS_SUBNET,		0,		"" },
471	{ IS_REMOTE,		(IS_NO_RDISC
472				 | IS_BCAST_RDISC), "REMOTE" },
473	{ IS_PASSIVE,		(IS_NO_RDISC
474				 | IS_NO_RIP
475				 | IS_NO_SUPER_AG
476				 | IS_PM_RDISC
477				 | IS_NO_AG),	"PASSIVE" },
478	{ IS_EXTERNAL,		0,		"EXTERNAL" },
479	{ IS_CHECKED,		0,		"" },
480	{ IS_ALL_HOSTS,		0,		"" },
481	{ IS_ALL_ROUTERS,	0,		"" },
482	{ IS_DISTRUST,		0,		"DISTRUST" },
483	{ IS_BROKE,		IS_SICK,	"BROKEN" },
484	{ IS_SICK,		0,		"SICK" },
485	{ IS_DUP,		0,		"DUPLICATE" },
486	{ IS_REDIRECT_OK,	0,		"REDIRECT_OK" },
487	{ IS_NEED_NET_SYN,	0,		"" },
488	{ IS_NO_AG,		IS_NO_SUPER_AG,	"NO_AG" },
489	{ IS_NO_SUPER_AG,	0,		"NO_SUPER_AG" },
490	{ (IS_NO_RIPV1_IN
491	   | IS_NO_RIPV2_IN
492	   | IS_NO_RIPV1_OUT
493	   | IS_NO_RIPV2_OUT),	0,		"NO_RIP" },
494	{ (IS_NO_RIPV1_IN
495	   | IS_NO_RIPV1_OUT),	0,		"RIPV2" },
496	{ IS_NO_RIPV1_IN,	0,		"NO_RIPV1_IN" },
497	{ IS_NO_RIPV2_IN,	0,		"NO_RIPV2_IN" },
498	{ IS_NO_RIPV1_OUT,	0,		"NO_RIPV1_OUT" },
499	{ IS_NO_RIPV2_OUT,	0,		"NO_RIPV2_OUT" },
500	{ (IS_NO_ADV_IN
501	   | IS_NO_SOL_OUT
502	   | IS_NO_ADV_OUT),	IS_BCAST_RDISC,	"NO_RDISC" },
503	{ IS_NO_SOL_OUT,	0,		"NO_SOLICIT" },
504	{ IS_SOL_OUT,		0,		"SEND_SOLICIT" },
505	{ IS_NO_ADV_OUT,	IS_BCAST_RDISC,	"NO_RDISC_ADV" },
506	{ IS_ADV_OUT,		0,		"RDISC_ADV" },
507	{ IS_BCAST_RDISC,	0,		"BCAST_RDISC" },
508	{ IS_PM_RDISC,		0,		"" },
509	{ 0,			0,		"%#x"}
510};
511
512static const struct bits rs_bits[] = {
513	{ RS_IF,		0,		"IF" },
514	{ RS_NET_INT,		RS_NET_SYN,	"NET_INT" },
515	{ RS_NET_SYN,		0,		"NET_SYN" },
516	{ RS_SUBNET,		0,		"" },
517	{ RS_LOCAL,		0,		"LOCAL" },
518	{ RS_MHOME,		0,		"MHOME" },
519	{ RS_STATIC,		0,		"STATIC" },
520	{ RS_RDISC,		0,		"RDISC" },
521	{ 0,			0,		"%#x"}
522};
523
524
525static void
526trace_bits(const struct bits *tbl,
527	   u_int field,
528	   int force)
529{
530	u_int b;
531	char c;
532
533	if (force) {
534		(void)putc('<', ftrace);
535		c = 0;
536	} else {
537		c = '<';
538	}
539
540	while (field != 0
541	       && (b = tbl->bits_mask) != 0) {
542		if ((b & field) == b) {
543			if (tbl->bits_name[0] != '\0') {
544				if (c)
545					(void)putc(c, ftrace);
546				(void)fprintf(ftrace, "%s", tbl->bits_name);
547				c = '|';
548			}
549			if (0 == (field &= ~(b | tbl->bits_clear)))
550				break;
551		}
552		tbl++;
553	}
554	if (field != 0 && tbl->bits_name != NULL) {
555		if (c)
556			(void)putc(c, ftrace);
557		(void)fprintf(ftrace, tbl->bits_name, field);
558		c = '|';
559	}
560
561	if (c != '<' || force)
562		(void)fputs("> ", ftrace);
563}
564
565
566char *
567rtname(naddr dst,
568       naddr mask,
569       naddr gate)
570{
571	static char buf[3*4+3+1+2+3	/* "xxx.xxx.xxx.xxx/xx-->" */
572			+3*4+3+1];	/* "xxx.xxx.xxx.xxx" */
573	int i;
574
575	i = sprintf(buf, "%-16s-->", addrname(dst, mask, 0));
576	(void)sprintf(&buf[i], "%-*s", 15+20-MAX(20,i), naddr_ntoa(gate));
577	return buf;
578}
579
580
581static void
582print_rts(struct rt_spare *rts,
583	  int force_metric,		/* -1=suppress, 0=default */
584	  int force_ifp,		/* -1=suppress, 0=default */
585	  int force_router,		/* -1=suppress, 0=default, 1=display */
586	  int force_tag,		/* -1=suppress, 0=default, 1=display */
587	  int force_time)		/* 0=suppress, 1=display */
588{
589	int i;
590
591
592	if (force_metric >= 0)
593		(void)fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
594	if (force_ifp >= 0)
595		(void)fprintf(ftrace, "%s ", (rts->rts_ifp == NULL ?
596					      "if?" : rts->rts_ifp->int_name));
597	if (force_router > 0
598	    || (force_router == 0 && rts->rts_router != rts->rts_gate))
599		(void)fprintf(ftrace, "router=%s ",
600			      naddr_ntoa(rts->rts_router));
601	if (force_time > 0)
602		(void)fprintf(ftrace, "%s ", ts(rts->rts_time));
603	if (force_tag > 0
604	    || (force_tag == 0 && rts->rts_tag != 0))
605		(void)fprintf(ftrace, "tag=%#x ", ntohs(rts->rts_tag));
606	if (rts->rts_de_ag != 0) {
607		for (i = 1; (u_int)(1 << i) <= rts->rts_de_ag; i++)
608			continue;
609		(void)fprintf(ftrace, "de_ag=%d ", i);
610	}
611
612}
613
614
615void
616trace_if(const char *act,
617	 struct interface *ifp)
618{
619	if (!TRACEACTIONS || ftrace == NULL)
620		return;
621
622	lastlog();
623	(void)fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
624	(void)fprintf(ftrace, "%-15s-->%-15s ",
625		      naddr_ntoa(ifp->int_addr),
626		      addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
627				? ifp->int_dstaddr
628				: htonl(ifp->int_net)),
629			       ifp->int_mask, 1));
630	if (ifp->int_metric != 0)
631		(void)fprintf(ftrace, "metric=%d ", ifp->int_metric);
632	if (ifp->int_adj_inmetric != 0)
633		(void)fprintf(ftrace, "adj_inmetric=%u ",
634			      ifp->int_adj_inmetric);
635	if (ifp->int_adj_outmetric != 0)
636		(void)fprintf(ftrace, "adj_outmetric=%u ",
637			      ifp->int_adj_outmetric);
638	if (!IS_RIP_OUT_OFF(ifp->int_state)
639	    && ifp->int_d_metric != 0)
640		(void)fprintf(ftrace, "fake_default=%u ", ifp->int_d_metric);
641	trace_bits(if_bits, ifp->int_if_flags, 0);
642	trace_bits(is_bits, ifp->int_state, 0);
643	(void)fputc('\n',ftrace);
644}
645
646
647void
648trace_upslot(struct rt_entry *rt,
649	     struct rt_spare *rts,
650	     struct rt_spare *new)
651{
652	if (!TRACEACTIONS || ftrace == NULL)
653		return;
654
655	if (rts->rts_gate == new->rts_gate
656	    && rts->rts_router == new->rts_router
657	    && rts->rts_metric == new->rts_metric
658	    && rts->rts_tag == new->rts_tag
659	    && rts->rts_de_ag == new->rts_de_ag)
660		return;
661
662	lastlog();
663	if (new->rts_gate == 0) {
664		(void)fprintf(ftrace, "Del #%d %-35s ",
665			      (int)(rts - rt->rt_spares),
666			      rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
667		print_rts(rts, 0,0,0,0,
668			  (rts != rt->rt_spares
669			   || AGE_RT(rt->rt_state,new->rts_ifp)));
670
671	} else if (rts->rts_gate != RIP_DEFAULT) {
672		(void)fprintf(ftrace, "Chg #%d %-35s ",
673			      (int)(rts - rt->rt_spares),
674			      rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
675		print_rts(rts, 0,0,
676			  rts->rts_gate != new->rts_gate,
677			  rts->rts_tag != new->rts_tag,
678			  rts != rt->rt_spares || AGE_RT(rt->rt_state,
679							rt->rt_ifp));
680
681		(void)fprintf(ftrace, "\n       %19s%-16s ", "",
682			      (new->rts_gate != rts->rts_gate
683			       ? naddr_ntoa(new->rts_gate) : ""));
684		print_rts(new,
685			  -(new->rts_metric == rts->rts_metric),
686			  -(new->rts_ifp == rts->rts_ifp),
687			  0,
688			  rts->rts_tag != new->rts_tag,
689			  (new->rts_time != rts->rts_time
690			   && (rts != rt->rt_spares
691			       || AGE_RT(rt->rt_state, new->rts_ifp))));
692
693	} else {
694		(void)fprintf(ftrace, "Add #%d %-35s ",
695			      (int)(rts - rt->rt_spares),
696			      rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
697		print_rts(new, 0,0,0,0,
698			  (rts != rt->rt_spares
699			   || AGE_RT(rt->rt_state,new->rts_ifp)));
700	}
701	(void)fputc('\n',ftrace);
702}
703
704
705/* miscellaneous message checked by the caller
706 */
707void
708trace_misc(const char *p, ...)
709{
710	va_list args;
711
712	if (ftrace == NULL)
713		return;
714
715	lastlog();
716	va_start(args, p);
717	vfprintf(ftrace, p, args);
718	va_end(args);
719	(void)fputc('\n',ftrace);
720}
721
722
723/* display a message if tracing actions
724 */
725void
726trace_act(const char *p, ...)
727{
728	va_list args;
729
730	if (!TRACEACTIONS || ftrace == NULL)
731		return;
732
733	lastlog();
734	va_start(args, p);
735	vfprintf(ftrace, p, args);
736	va_end(args);
737	(void)fputc('\n',ftrace);
738}
739
740
741/* display a message if tracing packets
742 */
743void
744trace_pkt(const char *p, ...)
745{
746	va_list args;
747
748	if (!TRACEPACKETS || ftrace == NULL)
749		return;
750
751	lastlog();
752	va_start(args, p);
753	vfprintf(ftrace, p, args);
754	va_end(args);
755	(void)fputc('\n',ftrace);
756}
757
758
759void
760trace_change(struct rt_entry *rt,
761	     u_int	state,
762	     struct	rt_spare *new,
763	     const char	*label)
764{
765	if (ftrace == NULL)
766		return;
767
768	if (rt->rt_metric == new->rts_metric
769	    && rt->rt_gate == new->rts_gate
770	    && rt->rt_router == new->rts_router
771	    && rt->rt_state == state
772	    && rt->rt_tag == new->rts_tag
773	    && rt->rt_de_ag == new->rts_de_ag)
774		return;
775
776	lastlog();
777	(void)fprintf(ftrace, "%s %-35s ",
778		      label,
779		      rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
780	print_rts(rt->rt_spares,
781		  0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
782	trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
783
784	(void)fprintf(ftrace, "\n%*s %19s%-16s ",
785		      (int)strlen(label), "", "",
786		      (rt->rt_gate != new->rts_gate
787		       ? naddr_ntoa(new->rts_gate) : ""));
788	print_rts(new,
789		  -(new->rts_metric == rt->rt_metric),
790		  -(new->rts_ifp == rt->rt_ifp),
791		  0,
792		  rt->rt_tag != new->rts_tag,
793		  (rt->rt_time != new->rts_time
794		   && AGE_RT(rt->rt_state,new->rts_ifp)));
795	if (rt->rt_state != state)
796		trace_bits(rs_bits, state, 1);
797	(void)fputc('\n',ftrace);
798}
799
800
801void
802trace_add_del(const char * action, struct rt_entry *rt)
803{
804	if (ftrace == NULL)
805		return;
806
807	lastlog();
808	(void)fprintf(ftrace, "%s    %-35s ",
809		      action,
810		      rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
811	print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
812	trace_bits(rs_bits, rt->rt_state, 0);
813	(void)fputc('\n',ftrace);
814}
815
816
817/* ARGSUSED */
818static int
819walk_trace(struct radix_node *rn,
820	   struct walkarg *w UNUSED)
821{
822#define RT ((struct rt_entry *)rn)
823	struct rt_spare *rts;
824	int i;
825
826	(void)fprintf(ftrace, "  %-35s ",
827		      rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
828	print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp));
829	trace_bits(rs_bits, RT->rt_state, 0);
830	if (RT->rt_poison_time >= now_garbage
831	    && RT->rt_poison_metric < RT->rt_metric)
832		(void)fprintf(ftrace, "pm=%d@%s",
833			      RT->rt_poison_metric, ts(RT->rt_poison_time));
834
835	rts = &RT->rt_spares[1];
836	for (i = 1; i < NUM_SPARES; i++, rts++) {
837		if (rts->rts_gate != RIP_DEFAULT) {
838			(void)fprintf(ftrace,"\n    #%d%15s%-16s ",
839				      i, "", naddr_ntoa(rts->rts_gate));
840			print_rts(rts, 0,0,0,0,1);
841		}
842	}
843	(void)fputc('\n',ftrace);
844
845	return 0;
846}
847
848
849static void
850trace_dump(void)
851{
852	struct interface *ifp;
853
854	if (ftrace == NULL)
855		return;
856	lastlog();
857
858	(void)fputs("current daemon state:\n", ftrace);
859	LIST_FOREACH(ifp, &ifnet, int_list)
860		trace_if("", ifp);
861	(void)rn_walktree(rhead, walk_trace, 0);
862}
863
864
865void
866trace_rip(const char *dir1, const char *dir2,
867	  struct sockaddr_in *who,
868	  struct interface *ifp,
869	  struct rip *msg,
870	  int size)			/* total size of message */
871{
872	struct netinfo *n, *lim;
873#	define NA ((struct netauth*)n)
874	int i, seen_route;
875
876	if (!TRACEPACKETS || ftrace == NULL)
877		return;
878
879	lastlog();
880	if (msg->rip_cmd >= RIPCMD_MAX
881	    || msg->rip_vers == 0) {
882		(void)fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
883			      " %s.%d size=%d\n",
884			      dir1, msg->rip_vers, msg->rip_cmd, dir2,
885			      naddr_ntoa(who->sin_addr.s_addr),
886			      ntohs(who->sin_port),
887			      size);
888		return;
889	}
890
891	(void)fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
892		      dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
893		      naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
894		      ifp ? " via " : "", ifp ? ifp->int_name : "");
895	if (!TRACECONTENTS)
896		return;
897
898	seen_route = 0;
899	switch (msg->rip_cmd) {
900	case RIPCMD_REQUEST:
901	case RIPCMD_RESPONSE:
902		n = msg->rip_nets;
903		lim = (struct netinfo *)((char*)msg + size);
904		for (; n < lim; n++) {
905			if (!seen_route
906			    && n->n_family == RIP_AF_UNSPEC
907			    && ntohl(n->n_metric) == HOPCNT_INFINITY
908			    && msg->rip_cmd == RIPCMD_REQUEST
909			    && (n+1 == lim
910				|| (n+2 == lim
911				    && (n+1)->n_family == RIP_AF_AUTH))) {
912				(void)fputs("\tQUERY ", ftrace);
913				if (n->n_dst != 0)
914					(void)fprintf(ftrace, "%s ",
915						      naddr_ntoa(n->n_dst));
916				if (n->n_mask != 0)
917					(void)fprintf(ftrace, "mask=%#x ",
918						      (u_int)ntohl(n->n_mask));
919				if (n->n_nhop != 0)
920					(void)fprintf(ftrace, "nhop=%s ",
921						      naddr_ntoa(n->n_nhop));
922				if (n->n_tag != 0)
923					(void)fprintf(ftrace, "tag=%#x ",
924						      ntohs(n->n_tag));
925				(void)fputc('\n',ftrace);
926				continue;
927			}
928
929			if (n->n_family == RIP_AF_AUTH) {
930				if (NA->a_type == RIP_AUTH_PW
931				    && n == msg->rip_nets) {
932					(void)fprintf(ftrace, "\tPassword"
933						      " Authentication:"
934						      " \"%s\"\n",
935						      qstring(NA->au.au_pw,
936							  RIP_AUTH_PW_LEN));
937					continue;
938				}
939
940				if (NA->a_type == RIP_AUTH_MD5
941				    && n == msg->rip_nets) {
942					(void)fprintf(ftrace,
943						      "\tMD5 Auth"
944						      " pkt_len=%d KeyID=%u"
945						      " auth_len=%d"
946						      " seqno=%#x"
947						      " rsvd=%#x,%#x\n",
948					    ntohs(NA->au.a_md5.md5_pkt_len),
949					    NA->au.a_md5.md5_keyid,
950					    NA->au.a_md5.md5_auth_len,
951					    (int)ntohl(NA->au.a_md5.md5_seqno),
952					    (int)ntohs(NA->au.a_md5.rsvd[0]),
953					    (int)ntohs(NA->au.a_md5.rsvd[1]));
954					continue;
955				}
956				(void)fprintf(ftrace,
957					      "\tAuthentication type %d: ",
958					      ntohs(NA->a_type));
959				for (i = 0;
960				     i < (int)sizeof(NA->au.au_pw);
961				     i++)
962					(void)fprintf(ftrace, "%02x ",
963						      NA->au.au_pw[i]);
964				(void)fputc('\n',ftrace);
965				continue;
966			}
967
968			seen_route = 1;
969			if (n->n_family != RIP_AF_INET) {
970				(void)fprintf(ftrace,
971					      "\t(af %d) %-18s mask=%#x ",
972					      ntohs(n->n_family),
973					      naddr_ntoa(n->n_dst),
974					      (u_int)ntohl(n->n_mask));
975			} else if (msg->rip_vers == RIPv1) {
976				(void)fprintf(ftrace, "\t%-18s ",
977					      addrname(n->n_dst,
978						       ntohl(n->n_mask),
979						       n->n_mask==0 ? 2 : 1));
980			} else {
981				(void)fprintf(ftrace, "\t%-18s ",
982					      addrname(n->n_dst,
983						       ntohl(n->n_mask),
984						       n->n_mask==0 ? 2 : 0));
985			}
986			(void)fprintf(ftrace, "metric=%-2d ",
987				      (u_int)ntohl(n->n_metric));
988			if (n->n_nhop != 0)
989				(void)fprintf(ftrace, " nhop=%s ",
990					      naddr_ntoa(n->n_nhop));
991			if (n->n_tag != 0)
992				(void)fprintf(ftrace, "tag=%#x",
993					      ntohs(n->n_tag));
994			(void)fputc('\n',ftrace);
995		}
996		if (size != (char *)n - (char *)msg)
997			(void)fprintf(ftrace, "truncated record, len %d\n",
998				size);
999		break;
1000
1001	case RIPCMD_TRACEON:
1002		fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
1003			msg->rip_tracefile);
1004		break;
1005
1006	case RIPCMD_TRACEOFF:
1007		break;
1008	}
1009}
1010