[mirror_iproute2.git] / tc / tc.c

/*
 * tc.c		"tc" utility frontend.
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 * Fixes:
 *
 * Petri Mattila <petri@prihateam.fi> 990308: wrong memset's resulted in faults
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <dlfcn.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <errno.h>

#include "SNAPSHOT.h"
#include "utils.h"
#include "tc_util.h"
#include "tc_common.h"
#include "namespace.h"

int show_stats;
int show_details;
int show_raw;
int show_pretty;
int show_graph;
int timestamp;

int batch_mode;
int use_iec;
int force;
bool use_names;
int json;

static char *conf_file;

struct rtnl_handle rth;

static void *BODY;	/* cached handle dlopen(NULL) */
static struct qdisc_util *qdisc_list;
static struct filter_util *filter_list;

static int print_noqopt(struct qdisc_util *qu, FILE *f,
			struct rtattr *opt)
{
	if (opt && RTA_PAYLOAD(opt))
		fprintf(f, "[Unknown qdisc, optlen=%u] ",
			(unsigned int) RTA_PAYLOAD(opt));
	return 0;
}

static int parse_noqopt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
{
	if (argc) {
		fprintf(stderr, "Unknown qdisc \"%s\", hence option \"%s\" is unparsable\n", qu->id, *argv);
		return -1;
	}
	return 0;
}

static int print_nofopt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 fhandle)
{
	if (opt && RTA_PAYLOAD(opt))
		fprintf(f, "fh %08x [Unknown filter, optlen=%u] ",
			fhandle, (unsigned int) RTA_PAYLOAD(opt));
	else if (fhandle)
		fprintf(f, "fh %08x ", fhandle);
	return 0;
}

static int parse_nofopt(struct filter_util *qu, char *fhandle, int argc, char **argv, struct nlmsghdr *n)
{
	__u32 handle;

	if (argc) {
		fprintf(stderr, "Unknown filter \"%s\", hence option \"%s\" is unparsable\n", qu->id, *argv);
		return -1;
	}
	if (fhandle) {
		struct tcmsg *t = NLMSG_DATA(n);

		if (get_u32(&handle, fhandle, 16)) {
			fprintf(stderr, "Unparsable filter ID \"%s\"\n", fhandle);
			return -1;
		}
		t->tcm_handle = handle;
	}
	return 0;
}

struct qdisc_util *get_qdisc_kind(const char *str)
{
	void *dlh;
	char buf[256];
	struct qdisc_util *q;

	for (q = qdisc_list; q; q = q->next)
		if (strcmp(q->id, str) == 0)
			return q;

	snprintf(buf, sizeof(buf), "%s/q_%s.so", get_tc_lib(), str);
	dlh = dlopen(buf, RTLD_LAZY);
	if (!dlh) {
		/* look in current binary, only open once */
		dlh = BODY;
		if (dlh == NULL) {
			dlh = BODY = dlopen(NULL, RTLD_LAZY);
			if (dlh == NULL)
				goto noexist;
		}
	}

	snprintf(buf, sizeof(buf), "%s_qdisc_util", str);
	q = dlsym(dlh, buf);
	if (q == NULL)
		goto noexist;

reg:
	q->next = qdisc_list;
	qdisc_list = q;
	return q;

noexist:
	q = calloc(1, sizeof(*q));
	if (q) {
		q->id = strdup(str);
		q->parse_qopt = parse_noqopt;
		q->print_qopt = print_noqopt;
		goto reg;
	}
	return q;
}


struct filter_util *get_filter_kind(const char *str)
{
	void *dlh;
	char buf[256];
	struct filter_util *q;

	for (q = filter_list; q; q = q->next)
		if (strcmp(q->id, str) == 0)
			return q;

	snprintf(buf, sizeof(buf), "%s/f_%s.so", get_tc_lib(), str);
	dlh = dlopen(buf, RTLD_LAZY);
	if (dlh == NULL) {
		dlh = BODY;
		if (dlh == NULL) {
			dlh = BODY = dlopen(NULL, RTLD_LAZY);
			if (dlh == NULL)
				goto noexist;
		}
	}

	snprintf(buf, sizeof(buf), "%s_filter_util", str);
	q = dlsym(dlh, buf);
	if (q == NULL)
		goto noexist;

reg:
	q->next = filter_list;
	filter_list = q;
	return q;
noexist:
	q = calloc(1, sizeof(*q));
	if (q) {
		strncpy(q->id, str, 15);
		q->parse_fopt = parse_nofopt;
		q->print_fopt = print_nofopt;
		goto reg;
	}
	return q;
}

static void usage(void)
{
	fprintf(stderr, "Usage: tc [ OPTIONS ] OBJECT { COMMAND | help }\n"
			"       tc [-force] -batch filename\n"
			"where  OBJECT := { qdisc | class | filter | action | monitor | exec }\n"
	                "       OPTIONS := { -s[tatistics] | -d[etails] | -r[aw] | -p[retty] | -b[atch] [filename] | -n[etns] name |\n"
			"                    -nm | -nam[es] | { -cf | -conf } path } | -j[son]\n");
}

static int do_cmd(int argc, char **argv)
{
	if (matches(*argv, "qdisc") == 0)
		return do_qdisc(argc-1, argv+1);
	if (matches(*argv, "class") == 0)
		return do_class(argc-1, argv+1);
	if (matches(*argv, "filter") == 0)
		return do_filter(argc-1, argv+1);
	if (matches(*argv, "actions") == 0)
		return do_action(argc-1, argv+1);
	if (matches(*argv, "monitor") == 0)
		return do_tcmonitor(argc-1, argv+1);
	if (matches(*argv, "exec") == 0)
		return do_exec(argc-1, argv+1);
	if (matches(*argv, "help") == 0) {
		usage();
		return 0;
	}

	fprintf(stderr, "Object \"%s\" is unknown, try \"tc help\".\n",
		*argv);
	return -1;
}

static int batch(const char *name)
{
	char *line = NULL;
	size_t len = 0;
	int ret = 0;

	batch_mode = 1;
	if (name && strcmp(name, "-") != 0) {
		if (freopen(name, "r", stdin) == NULL) {
			fprintf(stderr, "Cannot open file \"%s\" for reading: %s\n",
				name, strerror(errno));
			return -1;
		}
	}

	tc_core_init();

	if (rtnl_open(&rth, 0) < 0) {
		fprintf(stderr, "Cannot open rtnetlink\n");
		return -1;
	}

	cmdlineno = 0;
	while (getcmdline(&line, &len, stdin) != -1) {
		char *largv[100];
		int largc;

		largc = makeargs(line, largv, 100);
		if (largc == 0)
			continue;	/* blank line */

		if (do_cmd(largc, largv)) {
			fprintf(stderr, "Command failed %s:%d\n", name, cmdlineno);
			ret = 1;
			if (!force)
				break;
		}
	}
	if (line)
		free(line);

	rtnl_close(&rth);
	return ret;
}


int main(int argc, char **argv)
{
	int ret;
	char *batch_file = NULL;

	while (argc > 1) {
		if (argv[1][0] != '-')
			break;
		if (matches(argv[1], "-stats") == 0 ||
			 matches(argv[1], "-statistics") == 0) {
			++show_stats;
		} else if (matches(argv[1], "-details") == 0) {
			++show_details;
		} else if (matches(argv[1], "-raw") == 0) {
			++show_raw;
		} else if (matches(argv[1], "-pretty") == 0) {
			++show_pretty;
		} else if (matches(argv[1], "-graph") == 0) {
			show_graph = 1;
		} else if (matches(argv[1], "-Version") == 0) {
			printf("tc utility, iproute2-ss%s\n", SNAPSHOT);
			return 0;
		} else if (matches(argv[1], "-iec") == 0) {
			++use_iec;
		} else if (matches(argv[1], "-help") == 0) {
			usage();
			return 0;
		} else if (matches(argv[1], "-force") == 0) {
			++force;
		} else if (matches(argv[1], "-batch") == 0) {
			argc--;	argv++;
			if (argc <= 1)
				usage();
			batch_file = argv[1];
		} else if (matches(argv[1], "-netns") == 0) {
			NEXT_ARG();
			if (netns_switch(argv[1]))
				return -1;
		} else if (matches(argv[1], "-names") == 0 ||
				matches(argv[1], "-nm") == 0) {
			use_names = true;
		} else if (matches(argv[1], "-cf") == 0 ||
				matches(argv[1], "-conf") == 0) {
			NEXT_ARG();
			conf_file = argv[1];
		} else if (matches(argv[1], "-timestamp") == 0) {
			timestamp++;
		} else if (matches(argv[1], "-tshort") == 0) {
			++timestamp;
			++timestamp_short;
		} else if (matches(argv[1], "-json") == 0) {
			++json;
		} else {
			fprintf(stderr, "Option \"%s\" is unknown, try \"tc -help\".\n", argv[1]);
			return -1;
		}
		argc--;	argv++;
	}

	if (batch_file)
		return batch(batch_file);

	if (argc <= 1) {
		usage();
		return 0;
	}

	tc_core_init();
	if (rtnl_open(&rth, 0) < 0) {
		fprintf(stderr, "Cannot open rtnetlink\n");
		exit(1);
	}

	if (use_names && cls_names_init(conf_file)) {
		ret = -1;
		goto Exit;
	}

	ret = do_cmd(argc-1, argv+1);
Exit:
	rtnl_close(&rth);

	if (use_names)
		cls_names_uninit();

	return ret;
}
Commit	Line	Data
aba5acdf SH	1	/*
	2	* tc.c "tc" utility frontend.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*
	9	* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
	10	*
	11	* Fixes:
	12	*
	13	* Petri Mattila <petri@prihateam.fi> 990308: wrong memset's resulted in faults
	14	*/
	15
	16	#include <stdio.h>
	17	#include <stdlib.h>
	18	#include <unistd.h>
aba5acdf SH	19	#include <fcntl.h>
	20	#include <dlfcn.h>
	21	#include <sys/socket.h>
	22	#include <netinet/in.h>
	23	#include <arpa/inet.h>
	24	#include <string.h>
	25	#include <errno.h>
	26
	27	#include "SNAPSHOT.h"
	28	#include "utils.h"
	29	#include "tc_util.h"
	30	#include "tc_common.h"
67e1d73b	31	#include "namespace.h"
aba5acdf	32
32a121cb SH	33	int show_stats;
	34	int show_details;
	35	int show_raw;
	36	int show_pretty;
	37	int show_graph;
32a6fbe5	38	int timestamp;
44dcfe82	39
32a121cb	40	int batch_mode;
32a121cb SH	41	int use_iec;
	42	int force;
	43	bool use_names;
c91d262f	44	int json;
4612d04d VK	45
	46	static char *conf_file;
	47
7901660a	48	struct rtnl_handle rth;
aba5acdf	49
32a121cb SH	50	static void BODY; / cached handle dlopen(NULL) */
	51	static struct qdisc_util *qdisc_list;
	52	static struct filter_util *filter_list;
aba5acdf	53
ae665a52	54	static int print_noqopt(struct qdisc_util qu, FILE f,
1798c9d5	55	struct rtattr *opt)
aba5acdf SH	56	{
aba5acdf SH	57	if (opt && RTA_PAYLOAD(opt))
ae665a52	58	fprintf(f, "[Unknown qdisc, optlen=%u] ",
32a121cb	59	(unsigned int) RTA_PAYLOAD(opt));
aba5acdf SH	60	return 0;
	61	}
	62
927e3cfb	63	static int parse_noqopt(struct qdisc_util qu, int argc, char argv, struct nlmsghdr n, const char *dev)
aba5acdf SH	64	{
	65	if (argc) {
	66	fprintf(stderr, "Unknown qdisc \"%s\", hence option \"%s\" is unparsable\n", qu->id, *argv);
	67	return -1;
	68	}
	69	return 0;
	70	}
	71
	72	static int print_nofopt(struct filter_util qu, FILE f, struct rtattr *opt, __u32 fhandle)
	73	{
	74	if (opt && RTA_PAYLOAD(opt))
ae665a52	75	fprintf(f, "fh %08x [Unknown filter, optlen=%u] ",
32a121cb	76	fhandle, (unsigned int) RTA_PAYLOAD(opt));
aba5acdf SH	77	else if (fhandle)
	78	fprintf(f, "fh %08x ", fhandle);
	79	return 0;
	80	}
	81
	82	static int parse_nofopt(struct filter_util qu, char fhandle, int argc, char *argv, struct nlmsghdr n)
	83	{
	84	__u32 handle;
	85
	86	if (argc) {
	87	fprintf(stderr, "Unknown filter \"%s\", hence option \"%s\" is unparsable\n", qu->id, *argv);
	88	return -1;
	89	}
	90	if (fhandle) {
	91	struct tcmsg *t = NLMSG_DATA(n);
32a121cb	92
aba5acdf SH	93	if (get_u32(&handle, fhandle, 16)) {
	94	fprintf(stderr, "Unparsable filter ID \"%s\"\n", fhandle);
	95	return -1;
	96	}
	97	t->tcm_handle = handle;
	98	}
	99	return 0;
	100	}
	101
4094db72	102	struct qdisc_util get_qdisc_kind(const char str)
aba5acdf SH	103	{
	104	void *dlh;
	105	char buf[256];
	106	struct qdisc_util *q;
	107
	108	for (q = qdisc_list; q; q = q->next)
	109	if (strcmp(q->id, str) == 0)
	110	return q;
	111
aa27f88c	112	snprintf(buf, sizeof(buf), "%s/q_%s.so", get_tc_lib(), str);
aba5acdf	113	dlh = dlopen(buf, RTLD_LAZY);
b7a45150 SH	114	if (!dlh) {
b7a45150 SH	115	/* look in current binary, only open once */
aba5acdf SH	116	dlh = BODY;
	117	if (dlh == NULL) {
	118	dlh = BODY = dlopen(NULL, RTLD_LAZY);
	119	if (dlh == NULL)
	120	goto noexist;
	121	}
	122	}
	123
95812b56	124	snprintf(buf, sizeof(buf), "%s_qdisc_util", str);
aba5acdf SH	125	q = dlsym(dlh, buf);
	126	if (q == NULL)
	127	goto noexist;
	128
	129	reg:
	130	q->next = qdisc_list;
	131	qdisc_list = q;
	132	return q;
	133
	134	noexist:
f89bb021	135	q = calloc(1, sizeof(*q));
aba5acdf	136	if (q) {
f89bb021	137	q->id = strdup(str);
aba5acdf SH	138	q->parse_qopt = parse_noqopt;
	139	q->print_qopt = print_noqopt;
	140	goto reg;
	141	}
	142	return q;
	143	}
	144
	145
4094db72	146	struct filter_util get_filter_kind(const char str)
aba5acdf SH	147	{
	148	void *dlh;
	149	char buf[256];
	150	struct filter_util *q;
	151
	152	for (q = filter_list; q; q = q->next)
	153	if (strcmp(q->id, str) == 0)
	154	return q;
	155
aa27f88c	156	snprintf(buf, sizeof(buf), "%s/f_%s.so", get_tc_lib(), str);
aba5acdf SH	157	dlh = dlopen(buf, RTLD_LAZY);
	158	if (dlh == NULL) {
	159	dlh = BODY;
	160	if (dlh == NULL) {
	161	dlh = BODY = dlopen(NULL, RTLD_LAZY);
	162	if (dlh == NULL)
	163	goto noexist;
	164	}
	165	}
	166
95812b56	167	snprintf(buf, sizeof(buf), "%s_filter_util", str);
aba5acdf SH	168	q = dlsym(dlh, buf);
	169	if (q == NULL)
	170	goto noexist;
	171
	172	reg:
	173	q->next = filter_list;
	174	filter_list = q;
	175	return q;
aba5acdf	176	noexist:
f89bb021	177	q = calloc(1, sizeof(*q));
aba5acdf	178	if (q) {
aba5acdf SH	179	strncpy(q->id, str, 15);
	180	q->parse_fopt = parse_nofopt;
	181	q->print_fopt = print_nofopt;
	182	goto reg;
	183	}
	184	return q;
	185	}
	186
c2f3a0f9	187	static void usage(void)
aba5acdf SH	188	{
aba5acdf SH	189	fprintf(stderr, "Usage: tc [ OPTIONS ] OBJECT { COMMAND \| help }\n"
10494d27	190	" tc [-force] -batch filename\n"
32a121cb SH	191	"where OBJECT := { qdisc \| class \| filter \| action \| monitor \| exec }\n"
32a121cb SH	192	" OPTIONS := { -s[tatistics] \| -d[etails] \| -r[aw] \| -p[retty] \| -b[atch] [filename] \| -n[etns] name \|\n"
c91d262f	193	" -nm \| -nam[es] \| { -cf \| -conf } path } \| -j[son]\n");
c2f3a0f9	194	}
	195
	196	static int do_cmd(int argc, char **argv)
	197	{
	198	if (matches(*argv, "qdisc") == 0)
	199	return do_qdisc(argc-1, argv+1);
c2f3a0f9	200	if (matches(*argv, "class") == 0)
c2f3a0f9	201	return do_class(argc-1, argv+1);
c2f3a0f9	202	if (matches(*argv, "filter") == 0)
c2f3a0f9	203	return do_filter(argc-1, argv+1);
c2f3a0f9	204	if (matches(*argv, "actions") == 0)
c2f3a0f9	205	return do_action(argc-1, argv+1);
5bec3484 JHS	206	if (matches(*argv, "monitor") == 0)
5bec3484 JHS	207	return do_tcmonitor(argc-1, argv+1);
4bd62446 DB	208	if (matches(*argv, "exec") == 0)
4bd62446 DB	209	return do_exec(argc-1, argv+1);
c2f3a0f9	210	if (matches(*argv, "help") == 0) {
	211	usage();
	212	return 0;
	213	}
ae665a52 SH	214
ae665a52 SH	215	fprintf(stderr, "Object \"%s\" is unknown, try \"tc help\".\n",
c2f3a0f9	216	*argv);
044ebf35	217	return -1;
aba5acdf SH	218	}
aba5acdf SH	219
c2f3a0f9	220	static int batch(const char *name)
aba5acdf	221	{
c2f3a0f9	222	char *line = NULL;
c2f3a0f9	223	size_t len = 0;
08856f02	224	int ret = 0;
c2f3a0f9	225
a3aa47a5	226	batch_mode = 1;
dd3e9085	227	if (name && strcmp(name, "-") != 0) {
c2f3a0f9	228	if (freopen(name, "r", stdin) == NULL) {
84d66882	229	fprintf(stderr, "Cannot open file \"%s\" for reading: %s\n",
c2f3a0f9	230	name, strerror(errno));
044ebf35	231	return -1;
aba5acdf	232	}
c2f3a0f9	233	}
	234
	235	tc_core_init();
	236
	237	if (rtnl_open(&rth, 0) < 0) {
	238	fprintf(stderr, "Cannot open rtnetlink\n");
	239	return -1;
	240	}
	241
351efcde	242	cmdlineno = 0;
08856f02 SH	243	while (getcmdline(&line, &len, stdin) != -1) {
	244	char *largv[100];
	245	int largc;
aba5acdf	246
c2f3a0f9	247	largc = makeargs(line, largv, 100);
08856f02 SH	248	if (largc == 0)
08856f02 SH	249	continue; /* blank line */
aba5acdf	250
08856f02	251	if (do_cmd(largc, largv)) {
351efcde	252	fprintf(stderr, "Command failed %s:%d\n", name, cmdlineno);
08856f02 SH	253	ret = 1;
	254	if (!force)
	255	break;
aba5acdf	256	}
c2f3a0f9	257	}
8ed63ab1 SH	258	if (line)
8ed63ab1 SH	259	free(line);
7901660a	260
c2f3a0f9	261	rtnl_close(&rth);
	262	return ret;
	263	}
7901660a	264
c2f3a0f9	265
	266	int main(int argc, char **argv)
	267	{
	268	int ret;
a3aa47a5	269	char *batch_file = NULL;
aba5acdf SH	270
	271	while (argc > 1) {
	272	if (argv[1][0] != '-')
	273	break;
	274	if (matches(argv[1], "-stats") == 0 \|\|
3ea2bf45	275	matches(argv[1], "-statistics") == 0) {
aba5acdf SH	276	++show_stats;
	277	} else if (matches(argv[1], "-details") == 0) {
	278	++show_details;
	279	} else if (matches(argv[1], "-raw") == 0) {
	280	++show_raw;
44dcfe82 SH	281	} else if (matches(argv[1], "-pretty") == 0) {
44dcfe82 SH	282	++show_pretty;
d954b34a VK	283	} else if (matches(argv[1], "-graph") == 0) {
d954b34a VK	284	show_graph = 1;
aba5acdf SH	285	} else if (matches(argv[1], "-Version") == 0) {
aba5acdf SH	286	printf("tc utility, iproute2-ss%s\n", SNAPSHOT);
044ebf35	287	return 0;
3ea2bf45 SH	288	} else if (matches(argv[1], "-iec") == 0) {
3ea2bf45 SH	289	++use_iec;
aba5acdf SH	290	} else if (matches(argv[1], "-help") == 0) {
aba5acdf SH	291	usage();
c2f3a0f9	292	return 0;
08856f02 SH	293	} else if (matches(argv[1], "-force") == 0) {
08856f02 SH	294	++force;
4612d04d	295	} else if (matches(argv[1], "-batch") == 0) {
08856f02	296	argc--; argv++;
a3aa47a5 SH	297	if (argc <= 1)
	298	usage();
	299	batch_file = argv[1];
67e1d73b VK	300	} else if (matches(argv[1], "-netns") == 0) {
	301	NEXT_ARG();
	302	if (netns_switch(argv[1]))
	303	return -1;
4612d04d VK	304	} else if (matches(argv[1], "-names") == 0 \|\|
	305	matches(argv[1], "-nm") == 0) {
	306	use_names = true;
	307	} else if (matches(argv[1], "-cf") == 0 \|\|
	308	matches(argv[1], "-conf") == 0) {
	309	NEXT_ARG();
	310	conf_file = argv[1];
32a6fbe5 ED	311	} else if (matches(argv[1], "-timestamp") == 0) {
	312	timestamp++;
	313	} else if (matches(argv[1], "-tshort") == 0) {
	314	++timestamp;
	315	++timestamp_short;
c91d262f JP	316	} else if (matches(argv[1], "-json") == 0) {
c91d262f JP	317	++json;
aba5acdf SH	318	} else {
aba5acdf SH	319	fprintf(stderr, "Option \"%s\" is unknown, try \"tc -help\".\n", argv[1]);
044ebf35	320	return -1;
aba5acdf SH	321	}
	322	argc--; argv++;
	323	}
	324
a3aa47a5 SH	325	if (batch_file)
a3aa47a5 SH	326	return batch(batch_file);
08856f02	327
c2f3a0f9	328	if (argc <= 1) {
	329	usage();
	330	return 0;
	331	}
	332
aba5acdf	333	tc_core_init();
7901660a SH	334	if (rtnl_open(&rth, 0) < 0) {
	335	fprintf(stderr, "Cannot open rtnetlink\n");
	336	exit(1);
	337	}
aba5acdf	338
4612d04d VK	339	if (use_names && cls_names_init(conf_file)) {
	340	ret = -1;
	341	goto Exit;
	342	}
	343
c2f3a0f9	344	ret = do_cmd(argc-1, argv+1);
4612d04d	345	Exit:
7901660a	346	rtnl_close(&rth);
c2f3a0f9	347
4612d04d VK	348	if (use_names)
	349	cls_names_uninit();
	350
c2f3a0f9	351	return ret;
aba5acdf	352	}