[unix-history] / usr / src / sbin / routed / trace.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)trace.c	5.2 (Berkeley) %G%";
#endif not lint

/*
 * Routing Table Management Daemon
 */
#define	RIPCMDS
#include "defs.h"

#define	NRECORDS	50		/* size of circular trace buffer */
#ifdef DEBUG
FILE	*ftrace = stdout;
int	tracing = 1;
#endif

traceinit(ifp)
	register struct interface *ifp;
{

	if (iftraceinit(ifp, &ifp->int_input) &&
	    iftraceinit(ifp, &ifp->int_output))
		return;
	tracing = 0;
	fprintf(stderr, "traceinit: can't init %s\n", ifp->int_name);
}

static
iftraceinit(ifp, ifd)
	struct interface *ifp;
	register struct ifdebug *ifd;
{
	register struct iftrace *t;

	ifd->ifd_records =
	  (struct iftrace *)malloc(NRECORDS * sizeof (struct iftrace));
	if (ifd->ifd_records == 0)
		return (0);
	ifd->ifd_front = ifd->ifd_records;
	ifd->ifd_count = 0;
	for (t = ifd->ifd_records; t < ifd->ifd_records + NRECORDS; t++) {
		t->ift_size = 0;
		t->ift_packet = 0;
	}
	ifd->ifd_if = ifp;
	return (1);
}

traceon(file)
	char *file;
{

	if (ftrace != NULL)
		return;
	ftrace = fopen(file, "a");
	if (ftrace == NULL)
		return;
	dup2(fileno(ftrace), 1);
	dup2(fileno(ftrace), 2);
	tracing = 1;
}

traceoff()
{
	if (!tracing)
		return;
	if (ftrace != NULL)
		fclose(ftrace);
	ftrace = NULL;
	tracing = 0;
}

trace(ifd, who, p, len, m)
	register struct ifdebug *ifd;
	struct sockaddr *who;
	char *p;
	int len, m;
{
	register struct iftrace *t;

	if (ifd->ifd_records == 0)
		return;
	t = ifd->ifd_front++;
	if (ifd->ifd_front >= ifd->ifd_records + NRECORDS)
		ifd->ifd_front = ifd->ifd_records;
	if (ifd->ifd_count < NRECORDS)
		ifd->ifd_count++;
	if (t->ift_size > 0 && t->ift_size < len && t->ift_packet) {
		free(t->ift_packet);
		t->ift_packet = 0;
	}
	t->ift_stamp = time(0);
	t->ift_who = *who;
	if (len > 0 && t->ift_packet == 0) {
		t->ift_packet = malloc(len);
		if (t->ift_packet == 0)
			len = 0;
	}
	if (len > 0)
		bcopy(p, t->ift_packet, len);
	t->ift_size = len;
	t->ift_metric = m;
}

traceaction(fd, action, rt)
	FILE *fd;
	char *action;
	struct rt_entry *rt;
{
	struct sockaddr_in *dst, *gate;
	static struct bits {
		int	t_bits;
		char	*t_name;
	} flagbits[] = {
		{ RTF_UP,	"UP" },
		{ RTF_GATEWAY,	"GATEWAY" },
		{ RTF_HOST,	"HOST" },
		{ 0 }
	}, statebits[] = {
		{ RTS_PASSIVE,	"PASSIVE" },
		{ RTS_REMOTE,	"REMOTE" },
		{ RTS_INTERFACE,"INTERFACE" },
		{ RTS_CHANGED,	"CHANGED" },
		{ 0 }
	};
	register struct bits *p;
	register int first;
	char *cp;
	struct interface *ifp;

	if (fd == NULL)
		return;
	fprintf(fd, "%s ", action);
	dst = (struct sockaddr_in *)&rt->rt_dst;
	gate = (struct sockaddr_in *)&rt->rt_router;
	fprintf(fd, "dst %s, ", inet_ntoa(dst->sin_addr));
	fprintf(fd, "router %s, metric %d, flags",
	     inet_ntoa(gate->sin_addr), rt->rt_metric);
	cp = " %s";
	for (first = 1, p = flagbits; p->t_bits > 0; p++) {
		if ((rt->rt_flags & p->t_bits) == 0)
			continue;
		fprintf(fd, cp, p->t_name);
		if (first) {
			cp = "|%s";
			first = 0;
		}
	}
	fprintf(fd, " state");
	cp = " %s";
	for (first = 1, p = statebits; p->t_bits > 0; p++) {
		if ((rt->rt_state & p->t_bits) == 0)
			continue;
		fprintf(fd, cp, p->t_name);
		if (first) {
			cp = "|%s";
			first = 0;
		}
	}
	putc('\n', fd);
	if (!tracepackets && (rt->rt_state & RTS_PASSIVE) == 0 && rt->rt_ifp)
		dumpif(fd, rt->rt_ifp);
	fflush(fd);
}

dumpif(fd, ifp)
	register struct interface *ifp;
{
	if (ifp->int_input.ifd_count || ifp->int_output.ifd_count) {
		fprintf(fd, "*** Packet history for interface %s ***\n",
			ifp->int_name);
		dumptrace(fd, "to", &ifp->int_output);
		dumptrace(fd, "from", &ifp->int_input);
		fprintf(fd, "*** end packet history ***\n");
	}
	fflush(fd);
}

dumptrace(fd, dir, ifd)
	FILE *fd;
	char *dir;
	register struct ifdebug *ifd;
{
	register struct iftrace *t;
	char *cp = !strcmp(dir, "to") ? "Output" : "Input";

	if (ifd->ifd_front == ifd->ifd_records &&
	    ifd->ifd_front->ift_size == 0) {
		fprintf(fd, "%s: no packets.\n", cp);
		fflush(fd);
		return;
	}
	fprintf(fd, "%s trace:\n", cp);
	t = ifd->ifd_front - ifd->ifd_count;
	if (t < ifd->ifd_records)
		t += NRECORDS;
	for ( ; ifd->ifd_count; ifd->ifd_count--, t++) {
		if (t >= ifd->ifd_records + NRECORDS)
			t = ifd->ifd_records;
		if (t->ift_size == 0)
			continue;
		fprintf(fd, "%.24s: metric=%d\n", ctime(&t->ift_stamp),
			t->ift_metric);
		dumppacket(fd, dir, &t->ift_who, t->ift_packet, t->ift_size);
	}
}

dumppacket(fd, dir, who, cp, size)
	FILE *fd;
	struct sockaddr_in *who;		/* should be sockaddr */
	char *dir, *cp;
	register int size;
{
	register struct rip *msg = (struct rip *)cp;
	register struct netinfo *n;

	if (msg->rip_cmd && msg->rip_cmd < RIPCMD_MAX)
		fprintf(fd, "%s %s %s.%d", ripcmds[msg->rip_cmd],
		    dir, inet_ntoa(who->sin_addr), ntohs(who->sin_port));
	else {
		fprintf(fd, "Bad cmd 0x%x %s %x.%d\n", msg->rip_cmd,
		    dir, inet_ntoa(who->sin_addr), ntohs(who->sin_port));
		fprintf(fd, "size=%d cp=%x packet=%x\n", size, cp, packet);
		fflush(fd);
		return;
	}
	switch (msg->rip_cmd) {

	case RIPCMD_REQUEST:
	case RIPCMD_RESPONSE:
		fprintf(fd, ":\n");
		size -= 4 * sizeof (char);
		n = msg->rip_nets;
		for (; size > 0; n++, size -= sizeof (struct netinfo)) {
			if (size < sizeof (struct netinfo))
				break;
			fprintf(fd, "\tdst %s metric %d\n",
#define	satosin(sa)	((struct sockaddr_in *)&sa)
			     inet_ntoa(satosin(n->rip_dst)->sin_addr),
			     ntohl(n->rip_metric));
		}
		break;

	case RIPCMD_TRACEON:
		fprintf(fd, ", file=%*s\n", size, msg->rip_tracefile);
		break;

	case RIPCMD_TRACEOFF:
		fprintf(fd, "\n");
		break;
	}
	fflush(fd);
}
Commit	Line	Data
5ff67f98 DF	1	/*
	2	* Copyright (c) 1983 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*/
	6
f036a54d	7	#ifndef lint
9bd44906	8	static char sccsid[] = "@(#)trace.c 5.2 (Berkeley) %G%";
5ff67f98	9	#endif not lint
f036a54d SL	10
	11	/*
	12	* Routing Table Management Daemon
	13	*/
	14	#define RIPCMDS
7fe7fe74	15	#include "defs.h"
f036a54d SL	16
	17	#define NRECORDS 50 /* size of circular trace buffer */
	18	#ifdef DEBUG
	19	FILE *ftrace = stdout;
	20	int tracing = 1;
	21	#endif
	22
	23	traceinit(ifp)
	24	register struct interface *ifp;
	25	{
	26
	27	if (iftraceinit(ifp, &ifp->int_input) &&
	28	iftraceinit(ifp, &ifp->int_output))
	29	return;
	30	tracing = 0;
	31	fprintf(stderr, "traceinit: can't init %s\n", ifp->int_name);
	32	}
	33
	34	static
	35	iftraceinit(ifp, ifd)
	36	struct interface *ifp;
	37	register struct ifdebug *ifd;
	38	{
	39	register struct iftrace *t;
	40
	41	ifd->ifd_records =
	42	(struct iftrace )malloc(NRECORDS sizeof (struct iftrace));
	43	if (ifd->ifd_records == 0)
	44	return (0);
	45	ifd->ifd_front = ifd->ifd_records;
b7e4f8be	46	ifd->ifd_count = 0;
f036a54d SL	47	for (t = ifd->ifd_records; t < ifd->ifd_records + NRECORDS; t++) {
	48	t->ift_size = 0;
	49	t->ift_packet = 0;
	50	}
	51	ifd->ifd_if = ifp;
	52	return (1);
	53	}
	54
	55	traceon(file)
	56	char *file;
	57	{
	58
	59	if (ftrace != NULL)
	60	return;
	61	ftrace = fopen(file, "a");
	62	if (ftrace == NULL)
	63	return;
	64	dup2(fileno(ftrace), 1);
	65	dup2(fileno(ftrace), 2);
	66	tracing = 1;
	67	}
	68
	69	traceoff()
	70	{
	71	if (!tracing)
	72	return;
	73	if (ftrace != NULL)
	74	fclose(ftrace);
	75	ftrace = NULL;
	76	tracing = 0;
	77	}
	78
	79	trace(ifd, who, p, len, m)
	80	register struct ifdebug *ifd;
	81	struct sockaddr *who;
	82	char *p;
	83	int len, m;
	84	{
	85	register struct iftrace *t;
	86
	87	if (ifd->ifd_records == 0)
	88	return;
	89	t = ifd->ifd_front++;
	90	if (ifd->ifd_front >= ifd->ifd_records + NRECORDS)
	91	ifd->ifd_front = ifd->ifd_records;
b7e4f8be MK	92	if (ifd->ifd_count < NRECORDS)
b7e4f8be MK	93	ifd->ifd_count++;
9bd44906	94	if (t->ift_size > 0 && t->ift_size < len && t->ift_packet) {
f036a54d	95	free(t->ift_packet);
9bd44906 MK	96	t->ift_packet = 0;
9bd44906 MK	97	}
f036a54d SL	98	t->ift_stamp = time(0);
f036a54d SL	99	t->ift_who = *who;
9bd44906	100	if (len > 0 && t->ift_packet == 0) {
f036a54d	101	t->ift_packet = malloc(len);
9bd44906	102	if (t->ift_packet == 0)
f036a54d SL	103	len = 0;
f036a54d SL	104	}
9bd44906 MK	105	if (len > 0)
9bd44906 MK	106	bcopy(p, t->ift_packet, len);
f036a54d SL	107	t->ift_size = len;
	108	t->ift_metric = m;
	109	}
	110
	111	traceaction(fd, action, rt)
	112	FILE *fd;
	113	char *action;
	114	struct rt_entry *rt;
	115	{
	116	struct sockaddr_in dst, gate;
	117	static struct bits {
	118	int t_bits;
	119	char *t_name;
	120	} flagbits[] = {
	121	{ RTF_UP, "UP" },
	122	{ RTF_GATEWAY, "GATEWAY" },
	123	{ RTF_HOST, "HOST" },
	124	{ 0 }
	125	}, statebits[] = {
	126	{ RTS_PASSIVE, "PASSIVE" },
	127	{ RTS_REMOTE, "REMOTE" },
	128	{ RTS_INTERFACE,"INTERFACE" },
	129	{ RTS_CHANGED, "CHANGED" },
	130	{ 0 }
	131	};
	132	register struct bits *p;
	133	register int first;
	134	char *cp;
	135	struct interface *ifp;
	136
	137	if (fd == NULL)
	138	return;
	139	fprintf(fd, "%s ", action);
	140	dst = (struct sockaddr_in *)&rt->rt_dst;
	141	gate = (struct sockaddr_in *)&rt->rt_router;
2513c24a SL	142	fprintf(fd, "dst %s, ", inet_ntoa(dst->sin_addr));
	143	fprintf(fd, "router %s, metric %d, flags",
	144	inet_ntoa(gate->sin_addr), rt->rt_metric);
f036a54d SL	145	cp = " %s";
	146	for (first = 1, p = flagbits; p->t_bits > 0; p++) {
	147	if ((rt->rt_flags & p->t_bits) == 0)
	148	continue;
	149	fprintf(fd, cp, p->t_name);
	150	if (first) {
	151	cp = "\|%s";
	152	first = 0;
	153	}
	154	}
	155	fprintf(fd, " state");
	156	cp = " %s";
	157	for (first = 1, p = statebits; p->t_bits > 0; p++) {
	158	if ((rt->rt_state & p->t_bits) == 0)
	159	continue;
	160	fprintf(fd, cp, p->t_name);
	161	if (first) {
	162	cp = "\|%s";
	163	first = 0;
	164	}
	165	}
	166	putc('\n', fd);
d5568f13	167	if (!tracepackets && (rt->rt_state & RTS_PASSIVE) == 0 && rt->rt_ifp)
f036a54d SL	168	dumpif(fd, rt->rt_ifp);
	169	fflush(fd);
	170	}
	171
	172	dumpif(fd, ifp)
	173	register struct interface *ifp;
	174	{
b7e4f8be MK	175	if (ifp->int_input.ifd_count \|\| ifp->int_output.ifd_count) {
	176	fprintf(fd, "* Packet history for interface %s *\n",
	177	ifp->int_name);
	178	dumptrace(fd, "to", &ifp->int_output);
	179	dumptrace(fd, "from", &ifp->int_input);
	180	fprintf(fd, "* end packet history *\n");
	181	}
9bd44906	182	fflush(fd);
f036a54d SL	183	}
	184
	185	dumptrace(fd, dir, ifd)
	186	FILE *fd;
	187	char *dir;
	188	register struct ifdebug *ifd;
	189	{
	190	register struct iftrace *t;
	191	char *cp = !strcmp(dir, "to") ? "Output" : "Input";
	192
	193	if (ifd->ifd_front == ifd->ifd_records &&
	194	ifd->ifd_front->ift_size == 0) {
	195	fprintf(fd, "%s: no packets.\n", cp);
9bd44906	196	fflush(fd);
f036a54d SL	197	return;
	198	}
	199	fprintf(fd, "%s trace:\n", cp);
b7e4f8be MK	200	t = ifd->ifd_front - ifd->ifd_count;
	201	if (t < ifd->ifd_records)
	202	t += NRECORDS;
	203	for ( ; ifd->ifd_count; ifd->ifd_count--, t++) {
	204	if (t >= ifd->ifd_records + NRECORDS)
	205	t = ifd->ifd_records;
f036a54d SL	206	if (t->ift_size == 0)
	207	continue;
	208	fprintf(fd, "%.24s: metric=%d\n", ctime(&t->ift_stamp),
	209	t->ift_metric);
	210	dumppacket(fd, dir, &t->ift_who, t->ift_packet, t->ift_size);
	211	}
	212	}
	213
	214	dumppacket(fd, dir, who, cp, size)
	215	FILE *fd;
	216	struct sockaddr_in who; / should be sockaddr */
	217	char dir, cp;
	218	register int size;
	219	{
	220	register struct rip msg = (struct rip )cp;
	221	register struct netinfo *n;
	222
	223	if (msg->rip_cmd && msg->rip_cmd < RIPCMD_MAX)
2513c24a SL	224	fprintf(fd, "%s %s %s.%d", ripcmds[msg->rip_cmd],
2513c24a SL	225	dir, inet_ntoa(who->sin_addr), ntohs(who->sin_port));
f036a54d SL	226	else {
f036a54d SL	227	fprintf(fd, "Bad cmd 0x%x %s %x.%d\n", msg->rip_cmd,
2513c24a	228	dir, inet_ntoa(who->sin_addr), ntohs(who->sin_port));
f036a54d	229	fprintf(fd, "size=%d cp=%x packet=%x\n", size, cp, packet);
9bd44906	230	fflush(fd);
f036a54d SL	231	return;
	232	}
	233	switch (msg->rip_cmd) {
	234
	235	case RIPCMD_REQUEST:
	236	case RIPCMD_RESPONSE:
	237	fprintf(fd, ":\n");
	238	size -= 4 * sizeof (char);
	239	n = msg->rip_nets;
	240	for (; size > 0; n++, size -= sizeof (struct netinfo)) {
	241	if (size < sizeof (struct netinfo))
	242	break;
2513c24a SL	243	fprintf(fd, "\tdst %s metric %d\n",
	244	#define satosin(sa) ((struct sockaddr_in *)&sa)
	245	inet_ntoa(satosin(n->rip_dst)->sin_addr),
	246	ntohl(n->rip_metric));
f036a54d SL	247	}
	248	break;
	249
	250	case RIPCMD_TRACEON:
	251	fprintf(fd, ", file=%*s\n", size, msg->rip_tracefile);
	252	break;
	253
	254	case RIPCMD_TRACEOFF:
	255	fprintf(fd, "\n");
	256	break;
	257	}
9bd44906	258	fflush(fd);
f036a54d	259	}