trace.c revision 331722 
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: stable/11/sbin/routed/trace.c 331722 2018-03-29 02:50:57Z eadler $
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: stable/11/sbin/routed/trace.c 331722 2018-03-29 02:50:57Z eadler $");
43#else
44__RCSID("$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 == NULL) ? "?" : 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 != NULL) {
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 != NULL && zap_stdio) {
204		if (ftrace != stdout)
205			fclose(ftrace);
206		ftrace = NULL;
207		fd = open(_PATH_DEVNULL, O_RDWR);
208		if (fd < 0)
209			return;
210		if (isatty(STDIN_FILENO))
211			(void)dup2(fd, STDIN_FILENO);
212		if (isatty(STDOUT_FILENO))
213			(void)dup2(fd, STDOUT_FILENO);
214		if (isatty(STDERR_FILENO))
215			(void)dup2(fd, STDERR_FILENO);
216		(void)close(fd);
217	}
218	lastlog_time.tv_sec = 0;
219}
220
221
222void
223trace_flush(void)
224{
225	if (ftrace != NULL) {
226		fflush(ftrace);
227		if (ferror(ftrace))
228			trace_off("tracing off: %s", strerror(ferror(ftrace)));
229	}
230}
231
232
233void
234trace_off(const char *p, ...)
235{
236	va_list args;
237
238
239	if (ftrace != NULL) {
240		lastlog();
241		va_start(args, p);
242		vfprintf(ftrace, p, args);
243		va_end(args);
244		(void)fputc('\n',ftrace);
245	}
246	trace_close(file_trace);
247
248	new_tracelevel = tracelevel = 0;
249}
250
251
252/* log a change in tracing
253 */
254void
255tracelevel_msg(const char *pat,
256	       int dump)		/* -1=no dump, 0=default, 1=force */
257{
258	static const char * const off_msgs[MAX_TRACELEVEL] = {
259		"Tracing actions stopped",
260		"Tracing packets stopped",
261		"Tracing packet contents stopped",
262		"Tracing kernel changes stopped",
263	};
264	static const char * const on_msgs[MAX_TRACELEVEL] = {
265		"Tracing actions started",
266		"Tracing packets started",
267		"Tracing packet contents started",
268		"Tracing kernel changes started",
269	};
270	u_int old_tracelevel = tracelevel;
271
272
273	if (new_tracelevel < 0)
274		new_tracelevel = 0;
275	else if (new_tracelevel > MAX_TRACELEVEL)
276		new_tracelevel = MAX_TRACELEVEL;
277
278	if (new_tracelevel < tracelevel) {
279		if (new_tracelevel <= 0) {
280			trace_off(pat, off_msgs[0]);
281		} else do {
282			tmsg(pat, off_msgs[tracelevel]);
283		}
284		while (--tracelevel != new_tracelevel);
285
286	} else if (new_tracelevel > tracelevel) {
287		do {
288			tmsg(pat, on_msgs[tracelevel++]);
289		} while (tracelevel != new_tracelevel);
290	}
291
292	if (dump > 0
293	    || (dump == 0 && old_tracelevel == 0 && tracelevel != 0))
294		trace_dump();
295}
296
297
298void
299set_tracefile(const char *filename,
300	      const char *pat,
301	      int dump)			/* -1=no dump, 0=default, 1=force */
302{
303	struct stat stbuf;
304	FILE *n_ftrace;
305	const char *fn;
306
307
308	/* Allow a null filename to increase the level if the trace file
309	 * is already open or if coming from a trusted source, such as
310	 * a signal or the command line.
311	 */
312	if (filename == NULL || filename[0] == '\0') {
313		filename = NULL;
314		if (ftrace == NULL) {
315			if (inittracename[0] == '\0') {
316				msglog("missing trace file name");
317				return;
318			}
319			fn = inittracename;
320		} else {
321			fn = NULL;
322		}
323
324	} else if (!strcmp(filename,"dump/../table")) {
325		trace_dump();
326		return;
327
328	} else {
329		/* Allow the file specified with "-T file" to be reopened,
330		 * but require all other names specified over the net to
331		 * match the official path.  The path can specify a directory
332		 * in which the file is to be created.
333		 */
334		if (strcmp(filename, inittracename)
335#ifdef _PATH_TRACE
336		    && (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
337			|| strstr(filename,"../")
338			|| 0 > stat(_PATH_TRACE, &stbuf))
339#endif
340		    ) {
341			msglog("wrong trace file \"%s\"", filename);
342			return;
343		}
344
345		/* If the new tracefile exists, it must be a regular file.
346		 */
347		if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
348			msglog("wrong type (%#x) of trace file \"%s\"",
349			       stbuf.st_mode, filename);
350			return;
351		}
352
353		fn = filename;
354	}
355
356	if (fn != NULL) {
357		n_ftrace = fopen(fn, "a");
358		if (n_ftrace == NULL) {
359			msglog("failed to open trace file \"%s\" %s",
360			       fn, strerror(errno));
361			if (fn == inittracename)
362				inittracename[0] = '\0';
363			return;
364		}
365
366		tmsg("switch to trace file %s", fn);
367
368		trace_close(file_trace = 1);
369
370		if (fn != savetracename)
371			strncpy(savetracename, fn, sizeof(savetracename)-1);
372		ftrace = n_ftrace;
373
374		fflush(stdout);
375		fflush(stderr);
376		dup2(fileno(ftrace), STDOUT_FILENO);
377		dup2(fileno(ftrace), STDERR_FILENO);
378	}
379
380	if (new_tracelevel == 0 || filename == NULL)
381		new_tracelevel++;
382	tracelevel_msg(pat, dump != 0 ? dump : (filename != NULL));
383}
384
385
386/* ARGSUSED */
387void
388sigtrace_on(int s UNUSED)
389{
390	new_tracelevel++;
391	sigtrace_pat = "SIGUSR1: %s";
392}
393
394
395/* ARGSUSED */
396void
397sigtrace_off(int s UNUSED)
398{
399	new_tracelevel--;
400	sigtrace_pat = "SIGUSR2: %s";
401}
402
403
404/* Set tracing after a signal.
405 */
406void
407set_tracelevel(void)
408{
409	if (new_tracelevel == tracelevel)
410		return;
411
412	/* If tracing entirely off, and there was no tracefile specified
413	 * on the command line, then leave it off.
414	 */
415	if (new_tracelevel > tracelevel && ftrace == NULL) {
416		if (savetracename[0] != '\0') {
417			set_tracefile(savetracename,sigtrace_pat,0);
418		} else if (inittracename[0] != '\0') {
419				set_tracefile(inittracename,sigtrace_pat,0);
420		} else {
421			new_tracelevel = 0;
422			return;
423		}
424	} else {
425		tracelevel_msg(sigtrace_pat, 0);
426	}
427}
428
429
430/* display an address
431 */
432char *
433addrname(naddr	addr,			/* in network byte order */
434	 naddr	mask,
435	 int	force)			/* 0=show mask if nonstandard, */
436{					/*	1=always show mask, 2=never */
437#define NUM_BUFS 4
438	static int bufno;
439	static struct {
440	    char    str[15+20];
441	} bufs[NUM_BUFS];
442	char *s, *sp;
443	naddr dmask;
444	size_t l;
445	int i;
446
447	strlcpy(bufs[bufno].str, naddr_ntoa(addr), sizeof(bufs[bufno].str));
448	s = bufs[bufno].str;
449	l = sizeof(bufs[bufno].str);
450	bufno = (bufno+1) % NUM_BUFS;
451
452	if (force == 1 || (force == 0 && mask != std_mask(addr))) {
453		sp = &s[strlen(s)];
454
455		dmask = mask & -mask;
456		if (mask + dmask == 0) {
457			for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
458				continue;
459			(void)snprintf(sp, s + l - sp, "/%d", 32-i);
460
461		} else {
462			(void)snprintf(sp, s + l - sp, " (mask %#x)",
463			    (u_int)mask);
464		}
465	}
466
467	return s;
468#undef NUM_BUFS
469}
470
471
472/* display a bit-field
473 */
474struct bits {
475	u_int	bits_mask;
476	u_int	bits_clear;
477	const char *bits_name;
478};
479
480static const struct bits if_bits[] = {
481	{ IFF_LOOPBACK,		0,		"LOOPBACK" },
482	{ IFF_POINTOPOINT,	0,		"PT-TO-PT" },
483	{ 0,			0,		0}
484};
485
486static const struct bits is_bits[] = {
487	{ IS_ALIAS,		0,		"ALIAS" },
488	{ IS_SUBNET,		0,		"" },
489	{ IS_REMOTE,		(IS_NO_RDISC
490				 | IS_BCAST_RDISC), "REMOTE" },
491	{ IS_PASSIVE,		(IS_NO_RDISC
492				 | IS_NO_RIP
493				 | IS_NO_SUPER_AG
494				 | IS_PM_RDISC
495				 | IS_NO_AG),	"PASSIVE" },
496	{ IS_EXTERNAL,		0,		"EXTERNAL" },
497	{ IS_CHECKED,		0,		"" },
498	{ IS_ALL_HOSTS,		0,		"" },
499	{ IS_ALL_ROUTERS,	0,		"" },
500	{ IS_DISTRUST,		0,		"DISTRUST" },
501	{ IS_BROKE,		IS_SICK,	"BROKEN" },
502	{ IS_SICK,		0,		"SICK" },
503	{ IS_DUP,		0,		"DUPLICATE" },
504	{ IS_REDIRECT_OK,	0,		"REDIRECT_OK" },
505	{ IS_NEED_NET_SYN,	0,		"" },
506	{ IS_NO_AG,		IS_NO_SUPER_AG,	"NO_AG" },
507	{ IS_NO_SUPER_AG,	0,		"NO_SUPER_AG" },
508	{ (IS_NO_RIPV1_IN
509	   | IS_NO_RIPV2_IN
510	   | IS_NO_RIPV1_OUT
511	   | IS_NO_RIPV2_OUT),	0,		"NO_RIP" },
512	{ (IS_NO_RIPV1_IN
513	   | IS_NO_RIPV1_OUT),	0,		"RIPV2" },
514	{ IS_NO_RIPV1_IN,	0,		"NO_RIPV1_IN" },
515	{ IS_NO_RIPV2_IN,	0,		"NO_RIPV2_IN" },
516	{ IS_NO_RIPV1_OUT,	0,		"NO_RIPV1_OUT" },
517	{ IS_NO_RIPV2_OUT,	0,		"NO_RIPV2_OUT" },
518	{ (IS_NO_ADV_IN
519	   | IS_NO_SOL_OUT
520	   | IS_NO_ADV_OUT),	IS_BCAST_RDISC,	"NO_RDISC" },
521	{ IS_NO_SOL_OUT,	0,		"NO_SOLICIT" },
522	{ IS_SOL_OUT,		0,		"SEND_SOLICIT" },
523	{ IS_NO_ADV_OUT,	IS_BCAST_RDISC,	"NO_RDISC_ADV" },
524	{ IS_ADV_OUT,		0,		"RDISC_ADV" },
525	{ IS_BCAST_RDISC,	0,		"BCAST_RDISC" },
526	{ IS_PM_RDISC,		0,		"" },
527	{ 0,			0,		"%#x"}
528};
529
530static const struct bits rs_bits[] = {
531	{ RS_IF,		0,		"IF" },
532	{ RS_NET_INT,		RS_NET_SYN,	"NET_INT" },
533	{ RS_NET_SYN,		0,		"NET_SYN" },
534	{ RS_SUBNET,		0,		"" },
535	{ RS_LOCAL,		0,		"LOCAL" },
536	{ RS_MHOME,		0,		"MHOME" },
537	{ RS_STATIC,		0,		"STATIC" },
538	{ RS_RDISC,		0,		"RDISC" },
539	{ 0,			0,		"%#x"}
540};
541
542
543static void
544trace_bits(const struct bits *tbl,
545	   u_int field,
546	   int force)
547{
548	u_int b;
549	char c;
550
551	if (force) {
552		(void)putc('<', ftrace);
553		c = 0;
554	} else {
555		c = '<';
556	}
557
558	while (field != 0
559	       && (b = tbl->bits_mask) != 0) {
560		if ((b & field) == b) {
561			if (tbl->bits_name[0] != '\0') {
562				if (c)
563					(void)putc(c, ftrace);
564				(void)fprintf(ftrace, "%s", tbl->bits_name);
565				c = '|';
566			}
567			if (0 == (field &= ~(b | tbl->bits_clear)))
568				break;
569		}
570		tbl++;
571	}
572	if (field != 0 && tbl->bits_name != NULL) {
573		if (c)
574			(void)putc(c, ftrace);
575		(void)fprintf(ftrace, tbl->bits_name, field);
576		c = '|';
577	}
578
579	if (c != '<' || force)
580		(void)fputs("> ", ftrace);
581}
582
583
584char *
585rtname(naddr dst,
586       naddr mask,
587       naddr gate)
588{
589	static char buf[3*4+3+1+2+3	/* "xxx.xxx.xxx.xxx/xx-->" */
590			+3*4+3+1];	/* "xxx.xxx.xxx.xxx" */
591	int i;
592
593	i = sprintf(buf, "%-16s-->", addrname(dst, mask, 0));
594	(void)sprintf(&buf[i], "%-*s", 15+20-MAX(20,i), naddr_ntoa(gate));
595	return buf;
596}
597
598
599static void
600print_rts(struct rt_spare *rts,
601	  int force_metric,		/* -1=suppress, 0=default */
602	  int force_ifp,		/* -1=suppress, 0=default */
603	  int force_router,		/* -1=suppress, 0=default, 1=display */
604	  int force_tag,		/* -1=suppress, 0=default, 1=display */
605	  int force_time)		/* 0=suppress, 1=display */
606{
607	int i;
608
609
610	if (force_metric >= 0)
611		(void)fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
612	if (force_ifp >= 0)
613		(void)fprintf(ftrace, "%s ", (rts->rts_ifp == NULL ?
614					      "if?" : rts->rts_ifp->int_name));
615	if (force_router > 0
616	    || (force_router == 0 && rts->rts_router != rts->rts_gate))
617		(void)fprintf(ftrace, "router=%s ",
618			      naddr_ntoa(rts->rts_router));
619	if (force_time > 0)
620		(void)fprintf(ftrace, "%s ", ts(rts->rts_time));
621	if (force_tag > 0
622	    || (force_tag == 0 && rts->rts_tag != 0))
623		(void)fprintf(ftrace, "tag=%#x ", ntohs(rts->rts_tag));
624	if (rts->rts_de_ag != 0) {
625		for (i = 1; (u_int)(1 << i) <= rts->rts_de_ag; i++)
626			continue;
627		(void)fprintf(ftrace, "de_ag=%d ", i);
628	}
629
630}
631
632
633void
634trace_if(const char *act,
635	 struct interface *ifp)
636{
637	if (!TRACEACTIONS || ftrace == NULL)
638		return;
639
640	lastlog();
641	(void)fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
642	(void)fprintf(ftrace, "%-15s-->%-15s ",
643		      naddr_ntoa(ifp->int_addr),
644		      addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
645				? ifp->int_dstaddr
646				: htonl(ifp->int_net)),
647			       ifp->int_mask, 1));
648	if (ifp->int_metric != 0)
649		(void)fprintf(ftrace, "metric=%d ", ifp->int_metric);
650	if (ifp->int_adj_inmetric != 0)
651		(void)fprintf(ftrace, "adj_inmetric=%u ",
652			      ifp->int_adj_inmetric);
653	if (ifp->int_adj_outmetric != 0)
654		(void)fprintf(ftrace, "adj_outmetric=%u ",
655			      ifp->int_adj_outmetric);
656	if (!IS_RIP_OUT_OFF(ifp->int_state)
657	    && ifp->int_d_metric != 0)
658		(void)fprintf(ftrace, "fake_default=%u ", ifp->int_d_metric);
659	trace_bits(if_bits, ifp->int_if_flags, 0);
660	trace_bits(is_bits, ifp->int_state, 0);
661	(void)fputc('\n',ftrace);
662}
663
664
665void
666trace_upslot(struct rt_entry *rt,
667	     struct rt_spare *rts,
668	     struct rt_spare *new)
669{
670	if (!TRACEACTIONS || ftrace == NULL)
671		return;
672
673	if (rts->rts_gate == new->rts_gate
674	    && rts->rts_router == new->rts_router
675	    && rts->rts_metric == new->rts_metric
676	    && rts->rts_tag == new->rts_tag
677	    && rts->rts_de_ag == new->rts_de_ag)
678		return;
679
680	lastlog();
681	if (new->rts_gate == 0) {
682		(void)fprintf(ftrace, "Del #%d %-35s ",
683			      (int)(rts - rt->rt_spares),
684			      rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
685		print_rts(rts, 0,0,0,0,
686			  (rts != rt->rt_spares
687			   || AGE_RT(rt->rt_state,new->rts_ifp)));
688
689	} else if (rts->rts_gate != RIP_DEFAULT) {
690		(void)fprintf(ftrace, "Chg #%d %-35s ",
691			      (int)(rts - rt->rt_spares),
692			      rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
693		print_rts(rts, 0,0,
694			  rts->rts_gate != new->rts_gate,
695			  rts->rts_tag != new->rts_tag,
696			  rts != rt->rt_spares || AGE_RT(rt->rt_state,
697							rt->rt_ifp));
698
699		(void)fprintf(ftrace, "\n       %19s%-16s ", "",
700			      (new->rts_gate != rts->rts_gate
701			       ? naddr_ntoa(new->rts_gate) : ""));
702		print_rts(new,
703			  -(new->rts_metric == rts->rts_metric),
704			  -(new->rts_ifp == rts->rts_ifp),
705			  0,
706			  rts->rts_tag != new->rts_tag,
707			  (new->rts_time != rts->rts_time
708			   && (rts != rt->rt_spares
709			       || AGE_RT(rt->rt_state, new->rts_ifp))));
710
711	} else {
712		(void)fprintf(ftrace, "Add #%d %-35s ",
713			      (int)(rts - rt->rt_spares),
714			      rtname(rt->rt_dst, rt->rt_mask, new->rts_gate));
715		print_rts(new, 0,0,0,0,
716			  (rts != rt->rt_spares
717			   || AGE_RT(rt->rt_state,new->rts_ifp)));
718	}
719	(void)fputc('\n',ftrace);
720}
721
722
723/* miscellaneous message checked by the caller
724 */
725void
726trace_misc(const char *p, ...)
727{
728	va_list args;
729
730	if (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 actions
742 */
743void
744trace_act(const char *p, ...)
745{
746	va_list args;
747
748	if (!TRACEACTIONS || 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
759/* display a message if tracing packets
760 */
761void
762trace_pkt(const char *p, ...)
763{
764	va_list args;
765
766	if (!TRACEPACKETS || ftrace == NULL)
767		return;
768
769	lastlog();
770	va_start(args, p);
771	vfprintf(ftrace, p, args);
772	va_end(args);
773	(void)fputc('\n',ftrace);
774}
775
776
777void
778trace_change(struct rt_entry *rt,
779	     u_int	state,
780	     struct	rt_spare *new,
781	     const char	*label)
782{
783	if (ftrace == NULL)
784		return;
785
786	if (rt->rt_metric == new->rts_metric
787	    && rt->rt_gate == new->rts_gate
788	    && rt->rt_router == new->rts_router
789	    && rt->rt_state == state
790	    && rt->rt_tag == new->rts_tag
791	    && rt->rt_de_ag == new->rts_de_ag)
792		return;
793
794	lastlog();
795	(void)fprintf(ftrace, "%s %-35s ",
796		      label,
797		      rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
798	print_rts(rt->rt_spares,
799		  0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
800	trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
801
802	(void)fprintf(ftrace, "\n%*s %19s%-16s ",
803		      (int)strlen(label), "", "",
804		      (rt->rt_gate != new->rts_gate
805		       ? naddr_ntoa(new->rts_gate) : ""));
806	print_rts(new,
807		  -(new->rts_metric == rt->rt_metric),
808		  -(new->rts_ifp == rt->rt_ifp),
809		  0,
810		  rt->rt_tag != new->rts_tag,
811		  (rt->rt_time != new->rts_time
812		   && AGE_RT(rt->rt_state,new->rts_ifp)));
813	if (rt->rt_state != state)
814		trace_bits(rs_bits, state, 1);
815	(void)fputc('\n',ftrace);
816}
817
818
819void
820trace_add_del(const char * action, struct rt_entry *rt)
821{
822	if (ftrace == NULL)
823		return;
824
825	lastlog();
826	(void)fprintf(ftrace, "%s    %-35s ",
827		      action,
828		      rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
829	print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
830	trace_bits(rs_bits, rt->rt_state, 0);
831	(void)fputc('\n',ftrace);
832}
833
834
835/* ARGSUSED */
836static int
837walk_trace(struct radix_node *rn,
838	   struct walkarg *w UNUSED)
839{
840#define RT ((struct rt_entry *)rn)
841	struct rt_spare *rts;
842	int i;
843
844	(void)fprintf(ftrace, "  %-35s ",
845		      rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
846	print_rts(&RT->rt_spares[0], 0,0,0,0, AGE_RT(RT->rt_state, RT->rt_ifp));
847	trace_bits(rs_bits, RT->rt_state, 0);
848	if (RT->rt_poison_time >= now_garbage
849	    && RT->rt_poison_metric < RT->rt_metric)
850		(void)fprintf(ftrace, "pm=%d@%s",
851			      RT->rt_poison_metric, ts(RT->rt_poison_time));
852
853	rts = &RT->rt_spares[1];
854	for (i = 1; i < NUM_SPARES; i++, rts++) {
855		if (rts->rts_gate != RIP_DEFAULT) {
856			(void)fprintf(ftrace,"\n    #%d%15s%-16s ",
857				      i, "", naddr_ntoa(rts->rts_gate));
858			print_rts(rts, 0,0,0,0,1);
859		}
860	}
861	(void)fputc('\n',ftrace);
862
863	return 0;
864}
865
866
867static void
868trace_dump(void)
869{
870	struct interface *ifp;
871
872	if (ftrace == NULL)
873		return;
874	lastlog();
875
876	(void)fputs("current daemon state:\n", ftrace);
877	LIST_FOREACH(ifp, &ifnet, int_list)
878		trace_if("", ifp);
879	(void)rn_walktree(rhead, walk_trace, 0);
880}
881
882
883void
884trace_rip(const char *dir1, const char *dir2,
885	  struct sockaddr_in *who,
886	  struct interface *ifp,
887	  struct rip *msg,
888	  int size)			/* total size of message */
889{
890	struct netinfo *n, *lim;
891#	define NA ((struct netauth*)n)
892	int i, seen_route;
893
894	if (!TRACEPACKETS || ftrace == NULL)
895		return;
896
897	lastlog();
898	if (msg->rip_cmd >= RIPCMD_MAX
899	    || msg->rip_vers == 0) {
900		(void)fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
901			      " %s.%d size=%d\n",
902			      dir1, msg->rip_vers, msg->rip_cmd, dir2,
903			      naddr_ntoa(who->sin_addr.s_addr),
904			      ntohs(who->sin_port),
905			      size);
906		return;
907	}
908
909	(void)fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
910		      dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
911		      naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
912		      ifp ? " via " : "", ifp ? ifp->int_name : "");
913	if (!TRACECONTENTS)
914		return;
915
916	seen_route = 0;
917	switch (msg->rip_cmd) {
918	case RIPCMD_REQUEST:
919	case RIPCMD_RESPONSE:
920		n = msg->rip_nets;
921		lim = (struct netinfo *)((char*)msg + size);
922		for (; n < lim; n++) {
923			if (!seen_route
924			    && n->n_family == RIP_AF_UNSPEC
925			    && ntohl(n->n_metric) == HOPCNT_INFINITY
926			    && msg->rip_cmd == RIPCMD_REQUEST
927			    && (n+1 == lim
928				|| (n+2 == lim
929				    && (n+1)->n_family == RIP_AF_AUTH))) {
930				(void)fputs("\tQUERY ", ftrace);
931				if (n->n_dst != 0)
932					(void)fprintf(ftrace, "%s ",
933						      naddr_ntoa(n->n_dst));
934				if (n->n_mask != 0)
935					(void)fprintf(ftrace, "mask=%#x ",
936						      (u_int)ntohl(n->n_mask));
937				if (n->n_nhop != 0)
938					(void)fprintf(ftrace, "nhop=%s ",
939						      naddr_ntoa(n->n_nhop));
940				if (n->n_tag != 0)
941					(void)fprintf(ftrace, "tag=%#x ",
942						      ntohs(n->n_tag));
943				(void)fputc('\n',ftrace);
944				continue;
945			}
946
947			if (n->n_family == RIP_AF_AUTH) {
948				if (NA->a_type == RIP_AUTH_PW
949				    && n == msg->rip_nets) {
950					(void)fprintf(ftrace, "\tPassword"
951						      " Authentication:"
952						      " \"%s\"\n",
953						      qstring(NA->au.au_pw,
954							  RIP_AUTH_PW_LEN));
955					continue;
956				}
957
958				if (NA->a_type == RIP_AUTH_MD5
959				    && n == msg->rip_nets) {
960					(void)fprintf(ftrace,
961						      "\tMD5 Auth"
962						      " pkt_len=%d KeyID=%u"
963						      " auth_len=%d"
964						      " seqno=%#x"
965						      " rsvd=%#x,%#x\n",
966					    ntohs(NA->au.a_md5.md5_pkt_len),
967					    NA->au.a_md5.md5_keyid,
968					    NA->au.a_md5.md5_auth_len,
969					    (int)ntohl(NA->au.a_md5.md5_seqno),
970					    (int)ntohs(NA->au.a_md5.rsvd[0]),
971					    (int)ntohs(NA->au.a_md5.rsvd[1]));
972					continue;
973				}
974				(void)fprintf(ftrace,
975					      "\tAuthentication type %d: ",
976					      ntohs(NA->a_type));
977				for (i = 0;
978				     i < (int)sizeof(NA->au.au_pw);
979				     i++)
980					(void)fprintf(ftrace, "%02x ",
981						      NA->au.au_pw[i]);
982				(void)fputc('\n',ftrace);
983				continue;
984			}
985
986			seen_route = 1;
987			if (n->n_family != RIP_AF_INET) {
988				(void)fprintf(ftrace,
989					      "\t(af %d) %-18s mask=%#x ",
990					      ntohs(n->n_family),
991					      naddr_ntoa(n->n_dst),
992					      (u_int)ntohl(n->n_mask));
993			} else if (msg->rip_vers == RIPv1) {
994				(void)fprintf(ftrace, "\t%-18s ",
995					      addrname(n->n_dst,
996						       ntohl(n->n_mask),
997						       n->n_mask==0 ? 2 : 1));
998			} else {
999				(void)fprintf(ftrace, "\t%-18s ",
1000					      addrname(n->n_dst,
1001						       ntohl(n->n_mask),
1002						       n->n_mask==0 ? 2 : 0));
1003			}
1004			(void)fprintf(ftrace, "metric=%-2d ",
1005				      (u_int)ntohl(n->n_metric));
1006			if (n->n_nhop != 0)
1007				(void)fprintf(ftrace, " nhop=%s ",
1008					      naddr_ntoa(n->n_nhop));
1009			if (n->n_tag != 0)
1010				(void)fprintf(ftrace, "tag=%#x",
1011					      ntohs(n->n_tag));
1012			(void)fputc('\n',ftrace);
1013		}
1014		if (size != (char *)n - (char *)msg)
1015			(void)fprintf(ftrace, "truncated record, len %d\n",
1016				size);
1017		break;
1018
1019	case RIPCMD_TRACEON:
1020		fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
1021			msg->rip_tracefile);
1022		break;
1023
1024	case RIPCMD_TRACEOFF:
1025		break;
1026	}
1027}
1028