[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 <syslog.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"

int show_stats = 0;
int show_details = 0;
int show_raw = 0;
int resolve_hosts = 0;
int use_iec = 0;

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] ", RTA_PAYLOAD(opt));
	return 0;
}

static int parse_noqopt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
{
	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, 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), "/usr/lib/tc/q_%s.so", 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_util", str);
	q = dlsym(dlh, buf);
	if (q == NULL)
		goto noexist;

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

noexist:
	q = malloc(sizeof(*q));
	if (q) {

		memset(q, 0, sizeof(*q));
		q->id = strcpy(malloc(strlen(str)+1), 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), "/usr/lib/tc/f_%s.so", 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_util", str);
	q = dlsym(dlh, buf);
	if (q == NULL)
		goto noexist;

reg:
	q->next = filter_list;
	filter_list = q;
	return q;
noexist:
	q = malloc(sizeof(*q));
	if (q) {
		memset(q, 0, sizeof(*q));
		strncpy(q->id, str, 15);
		q->parse_fopt = parse_nofopt;
		q->print_fopt = print_nofopt;
		goto reg;
	}
	return q;
}

static void usage(void) __attribute__((noreturn));

static void usage(void)
{
	fprintf(stderr, "Usage: tc [ OPTIONS ] OBJECT { COMMAND | help }\n"
	                "where  OBJECT := { qdisc | class | filter | action }\n"
	                "       OPTIONS := { -s[tatistics] | -d[etails] | -r[aw] | -b[atch] file }\n");
	exit(-1);
}


int main(int argc, char **argv)
{
	char *basename;

	basename = strrchr(argv[0], '/');
	if (basename == NULL)
		basename = argv[0];
	else
		basename++;
	

	/* batch mode */
	if (argc > 1 && matches(argv[1], "-batch") == 0) {
		FILE *batch;
		char line[400];
		char *largv[100];
		int largc, ret=0;
#define	BMAXARG	(sizeof(largv)/sizeof(char *)-2)

		if (argc != 3) {
			fprintf(stderr, "Wrong number of arguments in batch mode\n");
			exit(-1);
		}
		if (matches(argv[2], "-") != 0) {
			if ((batch = fopen(argv[2], "r")) == NULL) {
				fprintf(stderr, "Cannot open file \"%s\" for reading: %s=n", argv[2], strerror(errno));
				exit(-1);
			}
		} else {
			if ((batch = fdopen(0, "r")) == NULL) {
				fprintf(stderr, "Cannot open stdin for reading: %s=n", strerror(errno));
				exit(-1);
			}
		}

		tc_core_init();

		while (fgets(line, sizeof(line)-1, batch)) {
			if (line[strlen(line)-1]=='\n') {
				line[strlen(line)-1] = '\0';
			} else {
				fprintf(stderr, "No newline at the end of line, looks like to long (%d chars or more)\n", strlen(line));
				exit(-1);
			}
			largc = 0;
			largv[largc]=strtok(line, " ");
			while ((largv[++largc]=strtok(NULL, " ")) != NULL) {
				if (largc > BMAXARG) {
					fprintf(stderr, "Over %d arguments in batch mode, enough!\n", BMAXARG);
					exit(-1);
				}
			}

			if (matches(largv[0], "qdisc") == 0) {
				ret += do_qdisc(largc-1, largv+1);
			} else if (matches(largv[0], "class") == 0) {
				ret += do_class(largc-1, largv+1);
			} else if (matches(largv[0], "filter") == 0) {
				ret += do_filter(largc-1, largv+1);
			} else if (matches(largv[0], "action") == 0) {
				ret += do_action(largc-1, largv+1);
			} else if (matches(largv[0], "help") == 0) {
				usage();	/* note that usage() doesn't return */
			} else {
				fprintf(stderr, "Object \"%s\" is unknown, try \"tc help\".\n", largv[1]);
				exit(-1);
			}
		}
		fclose(batch);
		exit(0); /* end of batch, that's all */
	}

	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], "-Version") == 0) {
			printf("tc utility, iproute2-ss%s\n", SNAPSHOT);
			exit(0);
		} else if (matches(argv[1], "-iec") == 0) {
			++use_iec;
		} else if (matches(argv[1], "-help") == 0) {
			usage();
		} else {
			fprintf(stderr, "Option \"%s\" is unknown, try \"tc -help\".\n", argv[1]);
			exit(-1);
		}
		argc--;	argv++;
	}

	tc_core_init();

	if (argc > 1) {
		if (matches(argv[1], "qdisc") == 0)
			return do_qdisc(argc-2, argv+2);
		if (matches(argv[1], "class") == 0)
			return do_class(argc-2, argv+2);
		if (matches(argv[1], "filter") == 0)
			return do_filter(argc-2, argv+2);
		if (matches(argv[1], "actions") == 0)
			return do_action(argc-2, argv+2);
		if (matches(argv[1], "help") == 0)
			usage();
		fprintf(stderr, "Object \"%s\" is unknown, try \"tc help\".\n", argv[1]);
		exit(-1);
	}

	usage();
}
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>
	19	#include <syslog.h>
	20	#include <fcntl.h>
	21	#include <dlfcn.h>
	22	#include <sys/socket.h>
	23	#include <netinet/in.h>
	24	#include <arpa/inet.h>
	25	#include <string.h>
	26	#include <errno.h>
	27
	28	#include "SNAPSHOT.h"
	29	#include "utils.h"
	30	#include "tc_util.h"
	31	#include "tc_common.h"
	32
	33	int show_stats = 0;
	34	int show_details = 0;
	35	int show_raw = 0;
	36	int resolve_hosts = 0;
3ea2bf45	37	int use_iec = 0;
aba5acdf	38
b7a45150	39	static void BODY; / cached handle dlopen(NULL) */
aba5acdf SH	40	static struct qdisc_util * qdisc_list;
	41	static struct filter_util * filter_list;
	42
1798c9d5 SH	43	static int print_noqopt(struct qdisc_util qu, FILE f,
1798c9d5 SH	44	struct rtattr *opt)
aba5acdf SH	45	{
	46	if (opt && RTA_PAYLOAD(opt))
	47	fprintf(f, "[Unknown qdisc, optlen=%u] ", RTA_PAYLOAD(opt));
	48	return 0;
	49	}
	50
	51	static int parse_noqopt(struct qdisc_util qu, int argc, char argv, struct nlmsghdr n)
	52	{
	53	if (argc) {
	54	fprintf(stderr, "Unknown qdisc \"%s\", hence option \"%s\" is unparsable\n", qu->id, *argv);
	55	return -1;
	56	}
	57	return 0;
	58	}
	59
	60	static int print_nofopt(struct filter_util qu, FILE f, struct rtattr *opt, __u32 fhandle)
	61	{
	62	if (opt && RTA_PAYLOAD(opt))
	63	fprintf(f, "fh %08x [Unknown filter, optlen=%u] ", fhandle, RTA_PAYLOAD(opt));
	64	else if (fhandle)
	65	fprintf(f, "fh %08x ", fhandle);
	66	return 0;
	67	}
	68
	69	static int parse_nofopt(struct filter_util qu, char fhandle, int argc, char *argv, struct nlmsghdr n)
	70	{
	71	__u32 handle;
	72
	73	if (argc) {
	74	fprintf(stderr, "Unknown filter \"%s\", hence option \"%s\" is unparsable\n", qu->id, *argv);
	75	return -1;
	76	}
	77	if (fhandle) {
	78	struct tcmsg *t = NLMSG_DATA(n);
	79	if (get_u32(&handle, fhandle, 16)) {
	80	fprintf(stderr, "Unparsable filter ID \"%s\"\n", fhandle);
	81	return -1;
	82	}
	83	t->tcm_handle = handle;
	84	}
	85	return 0;
	86	}
	87
4094db72	88	struct qdisc_util get_qdisc_kind(const char str)
aba5acdf SH	89	{
	90	void *dlh;
	91	char buf[256];
	92	struct qdisc_util *q;
	93
	94	for (q = qdisc_list; q; q = q->next)
	95	if (strcmp(q->id, str) == 0)
	96	return q;
	97
b7a45150	98	snprintf(buf, sizeof(buf), "/usr/lib/tc/q_%s.so", str);
aba5acdf	99	dlh = dlopen(buf, RTLD_LAZY);
b7a45150 SH	100	if (!dlh) {
b7a45150 SH	101	/* look in current binary, only open once */
aba5acdf SH	102	dlh = BODY;
	103	if (dlh == NULL) {
	104	dlh = BODY = dlopen(NULL, RTLD_LAZY);
	105	if (dlh == NULL)
	106	goto noexist;
	107	}
	108	}
	109
	110	snprintf(buf, sizeof(buf), "%s_util", str);
	111	q = dlsym(dlh, buf);
	112	if (q == NULL)
	113	goto noexist;
	114
	115	reg:
	116	q->next = qdisc_list;
	117	qdisc_list = q;
	118	return q;
	119
	120	noexist:
	121	q = malloc(sizeof(*q));
	122	if (q) {
1798c9d5	123
aba5acdf	124	memset(q, 0, sizeof(*q));
1798c9d5	125	q->id = strcpy(malloc(strlen(str)+1), str);
aba5acdf SH	126	q->parse_qopt = parse_noqopt;
	127	q->print_qopt = print_noqopt;
	128	goto reg;
	129	}
	130	return q;
	131	}
	132
	133
4094db72	134	struct filter_util get_filter_kind(const char str)
aba5acdf SH	135	{
	136	void *dlh;
	137	char buf[256];
	138	struct filter_util *q;
	139
	140	for (q = filter_list; q; q = q->next)
	141	if (strcmp(q->id, str) == 0)
	142	return q;
	143
b7a45150	144	snprintf(buf, sizeof(buf), "/usr/lib/tc/f_%s.so", str);
aba5acdf SH	145	dlh = dlopen(buf, RTLD_LAZY);
	146	if (dlh == NULL) {
	147	dlh = BODY;
	148	if (dlh == NULL) {
	149	dlh = BODY = dlopen(NULL, RTLD_LAZY);
	150	if (dlh == NULL)
	151	goto noexist;
	152	}
	153	}
	154
	155	snprintf(buf, sizeof(buf), "%s_util", str);
	156	q = dlsym(dlh, buf);
	157	if (q == NULL)
	158	goto noexist;
	159
	160	reg:
	161	q->next = filter_list;
	162	filter_list = q;
	163	return q;
aba5acdf SH	164	noexist:
	165	q = malloc(sizeof(*q));
	166	if (q) {
	167	memset(q, 0, sizeof(*q));
	168	strncpy(q->id, str, 15);
	169	q->parse_fopt = parse_nofopt;
	170	q->print_fopt = print_nofopt;
	171	goto reg;
	172	}
	173	return q;
	174	}
	175
	176	static void usage(void) __attribute__((noreturn));
	177
	178	static void usage(void)
	179	{
	180	fprintf(stderr, "Usage: tc [ OPTIONS ] OBJECT { COMMAND \| help }\n"
2373fde9	181	"where OBJECT := { qdisc \| class \| filter \| action }\n"
aba5acdf SH	182	" OPTIONS := { -s[tatistics] \| -d[etails] \| -r[aw] \| -b[atch] file }\n");
	183	exit(-1);
	184	}
	185
	186
	187
	188	int main(int argc, char **argv)
	189	{
	190	char *basename;
	191
	192	basename = strrchr(argv[0], '/');
	193	if (basename == NULL)
	194	basename = argv[0];
	195	else
	196	basename++;
	197
	198
	199	/* batch mode */
	200	if (argc > 1 && matches(argv[1], "-batch") == 0) {
	201	FILE *batch;
	202	char line[400];
	203	char *largv[100];
	204	int largc, ret=0;
	205	#define BMAXARG (sizeof(largv)/sizeof(char *)-2)
	206
	207	if (argc != 3) {
	208	fprintf(stderr, "Wrong number of arguments in batch mode\n");
	209	exit(-1);
	210	}
	211	if (matches(argv[2], "-") != 0) {
	212	if ((batch = fopen(argv[2], "r")) == NULL) {
	213	fprintf(stderr, "Cannot open file \"%s\" for reading: %s=n", argv[2], strerror(errno));
	214	exit(-1);
	215	}
	216	} else {
	217	if ((batch = fdopen(0, "r")) == NULL) {
	218	fprintf(stderr, "Cannot open stdin for reading: %s=n", strerror(errno));
	219	exit(-1);
	220	}
	221	}
	222
	223	tc_core_init();
	224
	225	while (fgets(line, sizeof(line)-1, batch)) {
	226	if (line[strlen(line)-1]=='\n') {
	227	line[strlen(line)-1] = '\0';
	228	} else {
	229	fprintf(stderr, "No newline at the end of line, looks like to long (%d chars or more)\n", strlen(line));
	230	exit(-1);
	231	}
	232	largc = 0;
	233	largv[largc]=strtok(line, " ");
	234	while ((largv[++largc]=strtok(NULL, " ")) != NULL) {
	235	if (largc > BMAXARG) {
	236	fprintf(stderr, "Over %d arguments in batch mode, enough!\n", BMAXARG);
	237	exit(-1);
	238	}
	239	}
	240
	241	if (matches(largv[0], "qdisc") == 0) {
	242	ret += do_qdisc(largc-1, largv+1);
	243	} else if (matches(largv[0], "class") == 0) {
	244	ret += do_class(largc-1, largv+1);
	245	} else if (matches(largv[0], "filter") == 0) {
246	ret += do_filter(largc-1, largv+1);
2373fde9 SH	247	} else if (matches(largv[0], "action") == 0) {
2373fde9 SH	248	ret += do_action(largc-1, largv+1);
aba5acdf SH	249	} else if (matches(largv[0], "help") == 0) {
	250	usage(); /* note that usage() doesn't return */
	251	} else {
	252	fprintf(stderr, "Object \"%s\" is unknown, try \"tc help\".\n", largv[1]);
	253	exit(-1);
	254	}
	255	}
	256	fclose(batch);
	257	exit(0); /* end of batch, that's all */
	258	}
	259
	260	while (argc > 1) {
	261	if (argv[1][0] != '-')
	262	break;
	263	if (matches(argv[1], "-stats") == 0 \|\|
3ea2bf45	264	matches(argv[1], "-statistics") == 0) {
aba5acdf SH	265	++show_stats;
	266	} else if (matches(argv[1], "-details") == 0) {
	267	++show_details;
	268	} else if (matches(argv[1], "-raw") == 0) {
	269	++show_raw;
	270	} else if (matches(argv[1], "-Version") == 0) {
	271	printf("tc utility, iproute2-ss%s\n", SNAPSHOT);
	272	exit(0);
3ea2bf45 SH	273	} else if (matches(argv[1], "-iec") == 0) {
3ea2bf45 SH	274	++use_iec;
aba5acdf SH	275	} else if (matches(argv[1], "-help") == 0) {
	276	usage();
	277	} else {
	278	fprintf(stderr, "Option \"%s\" is unknown, try \"tc -help\".\n", argv[1]);
	279	exit(-1);
	280	}
	281	argc--; argv++;
	282	}
	283
	284	tc_core_init();
	285
	286	if (argc > 1) {
	287	if (matches(argv[1], "qdisc") == 0)
	288	return do_qdisc(argc-2, argv+2);
	289	if (matches(argv[1], "class") == 0)
	290	return do_class(argc-2, argv+2);
	291	if (matches(argv[1], "filter") == 0)
	292	return do_filter(argc-2, argv+2);
2373fde9 SH	293	if (matches(argv[1], "actions") == 0)
2373fde9 SH	294	return do_action(argc-2, argv+2);
aba5acdf SH	295	if (matches(argv[1], "help") == 0)
	296	usage();
	297	fprintf(stderr, "Object \"%s\" is unknown, try \"tc help\".\n", argv[1]);
	298	exit(-1);
	299	}
	300
	301	usage();
	302	}