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

#ifndef lint
static char sccsid[] = "@(#)trace.c	4.6 (Berkeley) %G%";
#endif

/*
 * 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_packet)
		free(t->ift_packet);
	t->ift_packet = 0;
	t->ift_stamp = time(0);
	t->ift_who = *who;
	if (len > 0) {
		t->ift_packet = malloc(len);
		if (t->ift_packet)
			bcopy(p, t->ift_packet, len);
		else
			len = 0;
	}
	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");
	}
}

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);
		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);
		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;
	}
}
Commit	Line	Data
f036a54d	1	#ifndef lint
b7e4f8be	2	static char sccsid[] = "@(#)trace.c 4.6 (Berkeley) %G%";
f036a54d SL	3	#endif
	4
	5	/*
	6	* Routing Table Management Daemon
	7	*/
	8	#define RIPCMDS
7fe7fe74	9	#include "defs.h"
f036a54d SL	10
	11	#define NRECORDS 50 /* size of circular trace buffer */
	12	#ifdef DEBUG
	13	FILE *ftrace = stdout;
	14	int tracing = 1;
	15	#endif
	16
	17	traceinit(ifp)
	18	register struct interface *ifp;
	19	{
	20
	21	if (iftraceinit(ifp, &ifp->int_input) &&
	22	iftraceinit(ifp, &ifp->int_output))
	23	return;
	24	tracing = 0;
	25	fprintf(stderr, "traceinit: can't init %s\n", ifp->int_name);
	26	}
	27
	28	static
	29	iftraceinit(ifp, ifd)
	30	struct interface *ifp;
	31	register struct ifdebug *ifd;
	32	{
	33	register struct iftrace *t;
	34
	35	ifd->ifd_records =
	36	(struct iftrace )malloc(NRECORDS sizeof (struct iftrace));
	37	if (ifd->ifd_records == 0)
	38	return (0);
	39	ifd->ifd_front = ifd->ifd_records;
b7e4f8be	40	ifd->ifd_count = 0;
f036a54d SL	41	for (t = ifd->ifd_records; t < ifd->ifd_records + NRECORDS; t++) {
	42	t->ift_size = 0;
	43	t->ift_packet = 0;
	44	}
	45	ifd->ifd_if = ifp;
	46	return (1);
	47	}
	48
	49	traceon(file)
	50	char *file;
	51	{
	52
	53	if (ftrace != NULL)
	54	return;
	55	ftrace = fopen(file, "a");
	56	if (ftrace == NULL)
	57	return;
	58	dup2(fileno(ftrace), 1);
	59	dup2(fileno(ftrace), 2);
	60	tracing = 1;
	61	}
	62
	63	traceoff()
	64	{
	65	if (!tracing)
	66	return;
	67	if (ftrace != NULL)
	68	fclose(ftrace);
	69	ftrace = NULL;
	70	tracing = 0;
	71	}
	72
	73	trace(ifd, who, p, len, m)
	74	register struct ifdebug *ifd;
	75	struct sockaddr *who;
	76	char *p;
	77	int len, m;
	78	{
	79	register struct iftrace *t;
	80
	81	if (ifd->ifd_records == 0)
	82	return;
	83	t = ifd->ifd_front++;
	84	if (ifd->ifd_front >= ifd->ifd_records + NRECORDS)
	85	ifd->ifd_front = ifd->ifd_records;
b7e4f8be MK	86	if (ifd->ifd_count < NRECORDS)
b7e4f8be MK	87	ifd->ifd_count++;
f036a54d SL	88	if (t->ift_size > 0 && t->ift_packet)
	89	free(t->ift_packet);
	90	t->ift_packet = 0;
	91	t->ift_stamp = time(0);
	92	t->ift_who = *who;
	93	if (len > 0) {
	94	t->ift_packet = malloc(len);
	95	if (t->ift_packet)
	96	bcopy(p, t->ift_packet, len);
	97	else
	98	len = 0;
	99	}
	100	t->ift_size = len;
	101	t->ift_metric = m;
	102	}
	103
	104	traceaction(fd, action, rt)
	105	FILE *fd;
	106	char *action;
	107	struct rt_entry *rt;
	108	{
	109	struct sockaddr_in dst, gate;
	110	static struct bits {
	111	int t_bits;
	112	char *t_name;
	113	} flagbits[] = {
	114	{ RTF_UP, "UP" },
	115	{ RTF_GATEWAY, "GATEWAY" },
	116	{ RTF_HOST, "HOST" },
	117	{ 0 }
	118	}, statebits[] = {
	119	{ RTS_PASSIVE, "PASSIVE" },
	120	{ RTS_REMOTE, "REMOTE" },
	121	{ RTS_INTERFACE,"INTERFACE" },
	122	{ RTS_CHANGED, "CHANGED" },
	123	{ 0 }
	124	};
	125	register struct bits *p;
	126	register int first;
	127	char *cp;
	128	struct interface *ifp;
	129
	130	if (fd == NULL)
	131	return;
	132	fprintf(fd, "%s ", action);
	133	dst = (struct sockaddr_in *)&rt->rt_dst;
	134	gate = (struct sockaddr_in *)&rt->rt_router;
2513c24a SL	135	fprintf(fd, "dst %s, ", inet_ntoa(dst->sin_addr));
	136	fprintf(fd, "router %s, metric %d, flags",
	137	inet_ntoa(gate->sin_addr), rt->rt_metric);
f036a54d SL	138	cp = " %s";
	139	for (first = 1, p = flagbits; p->t_bits > 0; p++) {
	140	if ((rt->rt_flags & p->t_bits) == 0)
	141	continue;
	142	fprintf(fd, cp, p->t_name);
	143	if (first) {
	144	cp = "\|%s";
	145	first = 0;
	146	}
	147	}
	148	fprintf(fd, " state");
	149	cp = " %s";
	150	for (first = 1, p = statebits; p->t_bits > 0; p++) {
	151	if ((rt->rt_state & p->t_bits) == 0)
	152	continue;
	153	fprintf(fd, cp, p->t_name);
	154	if (first) {
	155	cp = "\|%s";
	156	first = 0;
	157	}
	158	}
	159	putc('\n', fd);
d5568f13	160	if (!tracepackets && (rt->rt_state & RTS_PASSIVE) == 0 && rt->rt_ifp)
f036a54d SL	161	dumpif(fd, rt->rt_ifp);
	162	fflush(fd);
	163	}
	164
	165	dumpif(fd, ifp)
	166	register struct interface *ifp;
	167	{
b7e4f8be MK	168	if (ifp->int_input.ifd_count \|\| ifp->int_output.ifd_count) {
	169	fprintf(fd, "* Packet history for interface %s *\n",
	170	ifp->int_name);
	171	dumptrace(fd, "to", &ifp->int_output);
	172	dumptrace(fd, "from", &ifp->int_input);
	173	fprintf(fd, "* end packet history *\n");
	174	}
f036a54d SL	175	}
	176
	177	dumptrace(fd, dir, ifd)
	178	FILE *fd;
	179	char *dir;
	180	register struct ifdebug *ifd;
	181	{
	182	register struct iftrace *t;
	183	char *cp = !strcmp(dir, "to") ? "Output" : "Input";
	184
	185	if (ifd->ifd_front == ifd->ifd_records &&
	186	ifd->ifd_front->ift_size == 0) {
	187	fprintf(fd, "%s: no packets.\n", cp);
	188	return;
	189	}
	190	fprintf(fd, "%s trace:\n", cp);
b7e4f8be MK	191	t = ifd->ifd_front - ifd->ifd_count;
	192	if (t < ifd->ifd_records)
	193	t += NRECORDS;
	194	for ( ; ifd->ifd_count; ifd->ifd_count--, t++) {
	195	if (t >= ifd->ifd_records + NRECORDS)
	196	t = ifd->ifd_records;
f036a54d SL	197	if (t->ift_size == 0)
	198	continue;
	199	fprintf(fd, "%.24s: metric=%d\n", ctime(&t->ift_stamp),
	200	t->ift_metric);
	201	dumppacket(fd, dir, &t->ift_who, t->ift_packet, t->ift_size);
	202	}
	203	}
	204
	205	dumppacket(fd, dir, who, cp, size)
	206	FILE *fd;
	207	struct sockaddr_in who; / should be sockaddr */
	208	char dir, cp;
	209	register int size;
	210	{
	211	register struct rip msg = (struct rip )cp;
	212	register struct netinfo *n;
	213
	214	if (msg->rip_cmd && msg->rip_cmd < RIPCMD_MAX)
2513c24a SL	215	fprintf(fd, "%s %s %s.%d", ripcmds[msg->rip_cmd],
2513c24a SL	216	dir, inet_ntoa(who->sin_addr), ntohs(who->sin_port));
f036a54d SL	217	else {
f036a54d SL	218	fprintf(fd, "Bad cmd 0x%x %s %x.%d\n", msg->rip_cmd,
2513c24a	219	dir, inet_ntoa(who->sin_addr), ntohs(who->sin_port));
f036a54d SL	220	fprintf(fd, "size=%d cp=%x packet=%x\n", size, cp, packet);
	221	return;
	222	}
	223	switch (msg->rip_cmd) {
	224
	225	case RIPCMD_REQUEST:
	226	case RIPCMD_RESPONSE:
	227	fprintf(fd, ":\n");
	228	size -= 4 * sizeof (char);
	229	n = msg->rip_nets;
	230	for (; size > 0; n++, size -= sizeof (struct netinfo)) {
	231	if (size < sizeof (struct netinfo))
	232	break;
2513c24a SL	233	fprintf(fd, "\tdst %s metric %d\n",
	234	#define satosin(sa) ((struct sockaddr_in *)&sa)
	235	inet_ntoa(satosin(n->rip_dst)->sin_addr),
	236	ntohl(n->rip_metric));
f036a54d SL	237	}
	238	break;
	239
	240	case RIPCMD_TRACEON:
	241	fprintf(fd, ", file=%*s\n", size, msg->rip_tracefile);
	242	break;
	243
	244	case RIPCMD_TRACEOFF:
	245	fprintf(fd, "\n");
	246	break;
	247	}
	248	}