[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;
int pretty;

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, void *buf, size_t buflen)
{
	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, buf, buflen);
	if (matches(*argv, "actions") == 0)
		return do_action(argc-1, argv+1, buf, buflen);
	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;
}

#define TC_MAX_SUBC	10
static bool batchsize_enabled(int argc, char *argv[])
{
	struct {
		char *c;
		char *subc[TC_MAX_SUBC];
	} table[] = {
		{"filter", {"add", "delete", "change", "replace", NULL}},
		{"actions", {"add", "change", "replace", NULL}},
		{ NULL },
	}, *iter;
	char *s;
	int i;

	if (argc < 2)
		return false;

	for (iter = table; iter->c; iter++) {
		if (matches(argv[0], iter->c))
			continue;
		for (i = 0; i < TC_MAX_SUBC; i++) {
			s = iter->subc[i];
			if (s && matches(argv[1], s) == 0)
				return true;
		}
	}

	return false;
}

struct batch_buf {
	struct batch_buf	*next;
	char			buf[16420];	/* sizeof (struct nlmsghdr) +
						   max(sizeof (struct tcmsg) +
						   sizeof (struct tcamsg)) +
						   MAX_MSG */
};

static struct batch_buf *get_batch_buf(struct batch_buf **pool,
				       struct batch_buf **head,
				       struct batch_buf **tail)
{
	struct batch_buf *buf;

	if (*pool == NULL)
		buf = calloc(1, sizeof (struct batch_buf));
	else {
		buf = *pool;
		*pool = (*pool)->next;
		memset(buf, 0, sizeof (struct batch_buf));
	}

	if (*head == NULL)
		*head = *tail = buf;
	else {
		(*tail)->next = buf;
		(*tail) = buf;
	}

	return buf;
}

static void put_batch_bufs(struct batch_buf **pool,
			   struct batch_buf **head,
			   struct batch_buf **tail)
{
	if (*head == NULL || *tail == NULL)
		return;

	if (*pool == NULL)
		*pool = *head;
	else {
		(*tail)->next = *pool;
		*pool = *head;
	}
	*head = NULL;
	*tail = NULL;
}

static void free_batch_bufs(struct batch_buf **pool)
{
	struct batch_buf *buf;

	for (buf = *pool; buf != NULL; buf = *pool) {
		*pool = buf->next;
		free(buf);
	}
	*pool = NULL;
}

static int batch(const char *name)
{
	struct batch_buf *head = NULL, *tail = NULL, *buf_pool = NULL;
	char *largv[100], *largv_next[100];
	char *line, *line_next = NULL;
	bool bs_enabled_next = false;
	bool bs_enabled = false;
	bool lastline = false;
	int largc, largc_next;
	bool bs_enabled_saved;
	int batchsize = 0;
	size_t len = 0;
	int ret = 0;
	bool send;

	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;
	if (getcmdline(&line, &len, stdin) == -1)
		goto Exit;
	largc = makeargs(line, largv, 100);
	bs_enabled = batchsize_enabled(largc, largv);
	bs_enabled_saved = bs_enabled;
	do {
		if (getcmdline(&line_next, &len, stdin) == -1)
			lastline = true;

		largc_next = makeargs(line_next, largv_next, 100);
		bs_enabled_next = batchsize_enabled(largc_next, largv_next);
		if (bs_enabled) {
			struct batch_buf *buf;

			buf = get_batch_buf(&buf_pool, &head, &tail);
			if (!buf) {
				fprintf(stderr,
					"failed to allocate batch_buf\n");
				return -1;
			}
			++batchsize;
		}

		/*
		 * In batch mode, if we haven't accumulated enough commands
		 * and this is not the last command and this command & next
		 * command both support the batchsize feature, don't send the
		 * message immediately.
		 */
		if (!lastline && bs_enabled && bs_enabled_next
		    && batchsize != MSG_IOV_MAX)
			send = false;
		else
			send = true;

		line = line_next;
		line_next = NULL;
		len = 0;
		bs_enabled_saved = bs_enabled;
		bs_enabled = bs_enabled_next;
		bs_enabled_next = false;

		if (largc == 0) {
			largc = largc_next;
			memcpy(largv, largv_next, largc * sizeof(char *));
			continue;	/* blank line */
		}

		ret = do_cmd(largc, largv, tail == NULL ? NULL : tail->buf,
			     tail == NULL ? 0 : sizeof (tail->buf));
		if (ret != 0) {
			fprintf(stderr, "Command failed %s:%d\n", name,
				cmdlineno - 1);
			ret = 1;
			if (!force)
				break;
		}
		largc = largc_next;
		memcpy(largv, largv_next, largc * sizeof(char *));

		if (send && bs_enabled_saved) {
			struct iovec *iov, *iovs;
			struct batch_buf *buf;
			struct nlmsghdr *n;

			iov = iovs = malloc(batchsize * sizeof (struct iovec));
			for (buf = head; buf != NULL; buf = buf->next, ++iov) {
				n = (struct nlmsghdr *)&buf->buf;
				iov->iov_base = n;
				iov->iov_len = n->nlmsg_len;
			}

			ret = rtnl_talk_iov(&rth, iovs, batchsize, NULL);
			if (ret < 0) {
				fprintf(stderr, "Command failed %s:%d\n", name,
					cmdlineno - (batchsize + ret) - 1);
				return 2;
			}
			put_batch_bufs(&buf_pool, &head, &tail);
			batchsize = 0;
			free(iovs);
		}
	} while (!lastline);

	free_batch_bufs(&buf_pool);
Exit:
	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 if (matches(argv[1], "-pretty") == 0) {
			++pretty;
		} 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, NULL, 0);
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;
a233caa0	45	int pretty;
4612d04d VK	46
	47	static char *conf_file;
	48
7901660a	49	struct rtnl_handle rth;
aba5acdf	50
32a121cb SH	51	static void BODY; / cached handle dlopen(NULL) */
	52	static struct qdisc_util *qdisc_list;
	53	static struct filter_util *filter_list;
aba5acdf	54
ae665a52	55	static int print_noqopt(struct qdisc_util qu, FILE f,
1798c9d5	56	struct rtattr *opt)
aba5acdf SH	57	{
aba5acdf SH	58	if (opt && RTA_PAYLOAD(opt))
ae665a52	59	fprintf(f, "[Unknown qdisc, optlen=%u] ",
32a121cb	60	(unsigned int) RTA_PAYLOAD(opt));
aba5acdf SH	61	return 0;
	62	}
	63
927e3cfb	64	static int parse_noqopt(struct qdisc_util qu, int argc, char argv, struct nlmsghdr n, const char *dev)
aba5acdf SH	65	{
	66	if (argc) {
	67	fprintf(stderr, "Unknown qdisc \"%s\", hence option \"%s\" is unparsable\n", qu->id, *argv);
	68	return -1;
	69	}
	70	return 0;
	71	}
	72
	73	static int print_nofopt(struct filter_util qu, FILE f, struct rtattr *opt, __u32 fhandle)
	74	{
	75	if (opt && RTA_PAYLOAD(opt))
ae665a52	76	fprintf(f, "fh %08x [Unknown filter, optlen=%u] ",
32a121cb	77	fhandle, (unsigned int) RTA_PAYLOAD(opt));
aba5acdf SH	78	else if (fhandle)
	79	fprintf(f, "fh %08x ", fhandle);
	80	return 0;
	81	}
	82
	83	static int parse_nofopt(struct filter_util qu, char fhandle, int argc, char *argv, struct nlmsghdr n)
	84	{
	85	__u32 handle;
	86
	87	if (argc) {
	88	fprintf(stderr, "Unknown filter \"%s\", hence option \"%s\" is unparsable\n", qu->id, *argv);
	89	return -1;
	90	}
	91	if (fhandle) {
	92	struct tcmsg *t = NLMSG_DATA(n);
32a121cb	93
aba5acdf SH	94	if (get_u32(&handle, fhandle, 16)) {
	95	fprintf(stderr, "Unparsable filter ID \"%s\"\n", fhandle);
	96	return -1;
	97	}
	98	t->tcm_handle = handle;
	99	}
	100	return 0;
	101	}
	102
4094db72	103	struct qdisc_util get_qdisc_kind(const char str)
aba5acdf SH	104	{
	105	void *dlh;
	106	char buf[256];
	107	struct qdisc_util *q;
	108
	109	for (q = qdisc_list; q; q = q->next)
	110	if (strcmp(q->id, str) == 0)
	111	return q;
	112
aa27f88c	113	snprintf(buf, sizeof(buf), "%s/q_%s.so", get_tc_lib(), str);
aba5acdf	114	dlh = dlopen(buf, RTLD_LAZY);
b7a45150 SH	115	if (!dlh) {
b7a45150 SH	116	/* look in current binary, only open once */
aba5acdf SH	117	dlh = BODY;
	118	if (dlh == NULL) {
	119	dlh = BODY = dlopen(NULL, RTLD_LAZY);
	120	if (dlh == NULL)
	121	goto noexist;
	122	}
	123	}
	124
95812b56	125	snprintf(buf, sizeof(buf), "%s_qdisc_util", str);
aba5acdf SH	126	q = dlsym(dlh, buf);
	127	if (q == NULL)
	128	goto noexist;
	129
	130	reg:
	131	q->next = qdisc_list;
	132	qdisc_list = q;
	133	return q;
	134
	135	noexist:
f89bb021	136	q = calloc(1, sizeof(*q));
aba5acdf	137	if (q) {
f89bb021	138	q->id = strdup(str);
aba5acdf SH	139	q->parse_qopt = parse_noqopt;
	140	q->print_qopt = print_noqopt;
	141	goto reg;
	142	}
	143	return q;
	144	}
	145
	146
4094db72	147	struct filter_util get_filter_kind(const char str)
aba5acdf SH	148	{
	149	void *dlh;
	150	char buf[256];
	151	struct filter_util *q;
	152
	153	for (q = filter_list; q; q = q->next)
	154	if (strcmp(q->id, str) == 0)
	155	return q;
	156
aa27f88c	157	snprintf(buf, sizeof(buf), "%s/f_%s.so", get_tc_lib(), str);
aba5acdf SH	158	dlh = dlopen(buf, RTLD_LAZY);
	159	if (dlh == NULL) {
	160	dlh = BODY;
	161	if (dlh == NULL) {
	162	dlh = BODY = dlopen(NULL, RTLD_LAZY);
	163	if (dlh == NULL)
	164	goto noexist;
	165	}
	166	}
	167
95812b56	168	snprintf(buf, sizeof(buf), "%s_filter_util", str);
aba5acdf SH	169	q = dlsym(dlh, buf);
	170	if (q == NULL)
	171	goto noexist;
	172
	173	reg:
	174	q->next = filter_list;
	175	filter_list = q;
	176	return q;
aba5acdf	177	noexist:
f89bb021	178	q = calloc(1, sizeof(*q));
aba5acdf	179	if (q) {
aba5acdf SH	180	strncpy(q->id, str, 15);
	181	q->parse_fopt = parse_nofopt;
	182	q->print_fopt = print_nofopt;
	183	goto reg;
	184	}
	185	return q;
	186	}
	187
c2f3a0f9	188	static void usage(void)
aba5acdf SH	189	{
aba5acdf SH	190	fprintf(stderr, "Usage: tc [ OPTIONS ] OBJECT { COMMAND \| help }\n"
10494d27	191	" tc [-force] -batch filename\n"
32a121cb SH	192	"where OBJECT := { qdisc \| class \| filter \| action \| monitor \| exec }\n"
32a121cb SH	193	" OPTIONS := { -s[tatistics] \| -d[etails] \| -r[aw] \| -p[retty] \| -b[atch] [filename] \| -n[etns] name \|\n"
c91d262f	194	" -nm \| -nam[es] \| { -cf \| -conf } path } \| -j[son]\n");
c2f3a0f9	195	}
c2f3a0f9	196
485d0c60	197	static int do_cmd(int argc, char *argv, void buf, size_t buflen)
c2f3a0f9	198	{
	199	if (matches(*argv, "qdisc") == 0)
	200	return do_qdisc(argc-1, argv+1);
c2f3a0f9	201	if (matches(*argv, "class") == 0)
c2f3a0f9	202	return do_class(argc-1, argv+1);
c2f3a0f9	203	if (matches(*argv, "filter") == 0)
485d0c60	204	return do_filter(argc-1, argv+1, buf, buflen);
c2f3a0f9	205	if (matches(*argv, "actions") == 0)
485d0c60	206	return do_action(argc-1, argv+1, buf, buflen);
5bec3484 JHS	207	if (matches(*argv, "monitor") == 0)
5bec3484 JHS	208	return do_tcmonitor(argc-1, argv+1);
4bd62446 DB	209	if (matches(*argv, "exec") == 0)
4bd62446 DB	210	return do_exec(argc-1, argv+1);
c2f3a0f9	211	if (matches(*argv, "help") == 0) {
	212	usage();
	213	return 0;
	214	}
ae665a52 SH	215
ae665a52 SH	216	fprintf(stderr, "Object \"%s\" is unknown, try \"tc help\".\n",
c2f3a0f9	217	*argv);
044ebf35	218	return -1;
aba5acdf SH	219	}
aba5acdf SH	220
485d0c60 CM	221	#define TC_MAX_SUBC 10
	222	static bool batchsize_enabled(int argc, char *argv[])
	223	{
	224	struct {
	225	char *c;
	226	char *subc[TC_MAX_SUBC];
	227	} table[] = {
	228	{"filter", {"add", "delete", "change", "replace", NULL}},
	229	{"actions", {"add", "change", "replace", NULL}},
	230	{ NULL },
	231	}, *iter;
	232	char *s;
	233	int i;
	234
	235	if (argc < 2)
	236	return false;
	237
	238	for (iter = table; iter->c; iter++) {
	239	if (matches(argv[0], iter->c))
	240	continue;
	241	for (i = 0; i < TC_MAX_SUBC; i++) {
	242	s = iter->subc[i];
	243	if (s && matches(argv[1], s) == 0)
	244	return true;
	245	}
	246	}
	247
	248	return false;
	249	}
	250
	251	struct batch_buf {
	252	struct batch_buf *next;
	253	char buf[16420]; /* sizeof (struct nlmsghdr) +
	254	max(sizeof (struct tcmsg) +
	255	sizeof (struct tcamsg)) +
	256	MAX_MSG */
	257	};
	258
	259	static struct batch_buf get_batch_buf(struct batch_buf *pool,
	260	struct batch_buf **head,
	261	struct batch_buf **tail)
	262	{
	263	struct batch_buf *buf;
	264
	265	if (*pool == NULL)
	266	buf = calloc(1, sizeof (struct batch_buf));
	267	else {
	268	buf = *pool;
	269	pool = (pool)->next;
	270	memset(buf, 0, sizeof (struct batch_buf));
	271	}
	272
	273	if (*head == NULL)
	274	head = tail = buf;
	275	else {
	276	(*tail)->next = buf;
	277	(*tail) = buf;
	278	}
	279
	280	return buf;
	281	}
	282
	283	static void put_batch_bufs(struct batch_buf **pool,
	284	struct batch_buf **head,
285	struct batch_buf **tail)
286	{
287	if (head == NULL \|\| tail == NULL)
288	return;
289
290	if (*pool == NULL)
291	pool = head;
292	else {
293	(tail)->next = pool;
294	pool = head;
295	}
296	*head = NULL;
297	*tail = NULL;
298	}
299
300	static void free_batch_bufs(struct batch_buf **pool)
301	{
302	struct batch_buf *buf;
303
304	for (buf = pool; buf != NULL; buf = pool) {
305	*pool = buf->next;
306	free(buf);
307	}
308	*pool = NULL;
309	}
310
c2f3a0f9	311	static int batch(const char *name)
aba5acdf	312	{
485d0c60 CM	313	struct batch_buf head = NULL, tail = NULL, *buf_pool = NULL;
	314	char largv[100], largv_next[100];
	315	char line, line_next = NULL;
	316	bool bs_enabled_next = false;
	317	bool bs_enabled = false;
	318	bool lastline = false;
	319	int largc, largc_next;
	320	bool bs_enabled_saved;
	321	int batchsize = 0;
c2f3a0f9	322	size_t len = 0;
08856f02	323	int ret = 0;
485d0c60	324	bool send;
c2f3a0f9	325
a3aa47a5	326	batch_mode = 1;
dd3e9085	327	if (name && strcmp(name, "-") != 0) {
c2f3a0f9	328	if (freopen(name, "r", stdin) == NULL) {
84d66882	329	fprintf(stderr, "Cannot open file \"%s\" for reading: %s\n",
c2f3a0f9	330	name, strerror(errno));
044ebf35	331	return -1;
aba5acdf	332	}
c2f3a0f9	333	}
	334
	335	tc_core_init();
	336
	337	if (rtnl_open(&rth, 0) < 0) {
	338	fprintf(stderr, "Cannot open rtnetlink\n");
	339	return -1;
	340	}
	341
351efcde	342	cmdlineno = 0;
485d0c60 CM	343	if (getcmdline(&line, &len, stdin) == -1)
	344	goto Exit;
	345	largc = makeargs(line, largv, 100);
	346	bs_enabled = batchsize_enabled(largc, largv);
	347	bs_enabled_saved = bs_enabled;
	348	do {
	349	if (getcmdline(&line_next, &len, stdin) == -1)
	350	lastline = true;
	351
	352	largc_next = makeargs(line_next, largv_next, 100);
	353	bs_enabled_next = batchsize_enabled(largc_next, largv_next);
	354	if (bs_enabled) {
	355	struct batch_buf *buf;
	356
	357	buf = get_batch_buf(&buf_pool, &head, &tail);
	358	if (!buf) {
	359	fprintf(stderr,
	360	"failed to allocate batch_buf\n");
	361	return -1;
	362	}
	363	++batchsize;
	364	}
aba5acdf	365
485d0c60 CM	366	/*
	367	* In batch mode, if we haven't accumulated enough commands
	368	* and this is not the last command and this command & next
	369	* command both support the batchsize feature, don't send the
	370	* message immediately.
	371	*/
	372	if (!lastline && bs_enabled && bs_enabled_next
	373	&& batchsize != MSG_IOV_MAX)
	374	send = false;
	375	else
	376	send = true;
	377
	378	line = line_next;
	379	line_next = NULL;
	380	len = 0;
	381	bs_enabled_saved = bs_enabled;
	382	bs_enabled = bs_enabled_next;
	383	bs_enabled_next = false;
	384
	385	if (largc == 0) {
	386	largc = largc_next;
	387	memcpy(largv, largv_next, largc * sizeof(char *));
08856f02	388	continue; /* blank line */
485d0c60	389	}
aba5acdf	390
485d0c60 CM	391	ret = do_cmd(largc, largv, tail == NULL ? NULL : tail->buf,
	392	tail == NULL ? 0 : sizeof (tail->buf));
	393	if (ret != 0) {
	394	fprintf(stderr, "Command failed %s:%d\n", name,
	395	cmdlineno - 1);
08856f02 SH	396	ret = 1;
	397	if (!force)
	398	break;
aba5acdf	399	}
485d0c60 CM	400	largc = largc_next;
	401	memcpy(largv, largv_next, largc * sizeof(char *));
	402
	403	if (send && bs_enabled_saved) {
	404	struct iovec iov, iovs;
	405	struct batch_buf *buf;
	406	struct nlmsghdr *n;
	407
	408	iov = iovs = malloc(batchsize * sizeof (struct iovec));
	409	for (buf = head; buf != NULL; buf = buf->next, ++iov) {
	410	n = (struct nlmsghdr *)&buf->buf;
	411	iov->iov_base = n;
	412	iov->iov_len = n->nlmsg_len;
	413	}
	414
	415	ret = rtnl_talk_iov(&rth, iovs, batchsize, NULL);
	416	if (ret < 0) {
	417	fprintf(stderr, "Command failed %s:%d\n", name,
	418	cmdlineno - (batchsize + ret) - 1);
	419	return 2;
	420	}
	421	put_batch_bufs(&buf_pool, &head, &tail);
	422	batchsize = 0;
	423	free(iovs);
	424	}
	425	} while (!lastline);
7901660a	426
485d0c60 CM	427	free_batch_bufs(&buf_pool);
	428	Exit:
	429	free(line);
c2f3a0f9	430	rtnl_close(&rth);
485d0c60	431
c2f3a0f9	432	return ret;
c2f3a0f9	433	}
7901660a	434
c2f3a0f9	435
	436	int main(int argc, char **argv)
	437	{
	438	int ret;
a3aa47a5	439	char *batch_file = NULL;
aba5acdf SH	440
	441	while (argc > 1) {
	442	if (argv[1][0] != '-')
	443	break;
	444	if (matches(argv[1], "-stats") == 0 \|\|
3ea2bf45	445	matches(argv[1], "-statistics") == 0) {
aba5acdf SH	446	++show_stats;
	447	} else if (matches(argv[1], "-details") == 0) {
	448	++show_details;
	449	} else if (matches(argv[1], "-raw") == 0) {
	450	++show_raw;
44dcfe82 SH	451	} else if (matches(argv[1], "-pretty") == 0) {
44dcfe82 SH	452	++show_pretty;
d954b34a VK	453	} else if (matches(argv[1], "-graph") == 0) {
d954b34a VK	454	show_graph = 1;
aba5acdf SH	455	} else if (matches(argv[1], "-Version") == 0) {
aba5acdf SH	456	printf("tc utility, iproute2-ss%s\n", SNAPSHOT);
044ebf35	457	return 0;
3ea2bf45 SH	458	} else if (matches(argv[1], "-iec") == 0) {
3ea2bf45 SH	459	++use_iec;
aba5acdf SH	460	} else if (matches(argv[1], "-help") == 0) {
aba5acdf SH	461	usage();
c2f3a0f9	462	return 0;
08856f02 SH	463	} else if (matches(argv[1], "-force") == 0) {
08856f02 SH	464	++force;
4612d04d	465	} else if (matches(argv[1], "-batch") == 0) {
08856f02	466	argc--; argv++;
a3aa47a5 SH	467	if (argc <= 1)
	468	usage();
	469	batch_file = argv[1];
67e1d73b VK	470	} else if (matches(argv[1], "-netns") == 0) {
	471	NEXT_ARG();
	472	if (netns_switch(argv[1]))
	473	return -1;
4612d04d VK	474	} else if (matches(argv[1], "-names") == 0 \|\|
	475	matches(argv[1], "-nm") == 0) {
	476	use_names = true;
	477	} else if (matches(argv[1], "-cf") == 0 \|\|
	478	matches(argv[1], "-conf") == 0) {
	479	NEXT_ARG();
	480	conf_file = argv[1];
32a6fbe5 ED	481	} else if (matches(argv[1], "-timestamp") == 0) {
	482	timestamp++;
	483	} else if (matches(argv[1], "-tshort") == 0) {
	484	++timestamp;
	485	++timestamp_short;
c91d262f JP	486	} else if (matches(argv[1], "-json") == 0) {
c91d262f JP	487	++json;
a233caa0 SH	488	} else if (matches(argv[1], "-pretty") == 0) {
a233caa0 SH	489	++pretty;
aba5acdf SH	490	} else {
aba5acdf SH	491	fprintf(stderr, "Option \"%s\" is unknown, try \"tc -help\".\n", argv[1]);
044ebf35	492	return -1;
aba5acdf SH	493	}
	494	argc--; argv++;
	495	}
	496
a3aa47a5 SH	497	if (batch_file)
a3aa47a5 SH	498	return batch(batch_file);
08856f02	499
c2f3a0f9	500	if (argc <= 1) {
	501	usage();
	502	return 0;
	503	}
	504
aba5acdf	505	tc_core_init();
7901660a SH	506	if (rtnl_open(&rth, 0) < 0) {
	507	fprintf(stderr, "Cannot open rtnetlink\n");
	508	exit(1);
	509	}
aba5acdf	510
4612d04d VK	511	if (use_names && cls_names_init(conf_file)) {
	512	ret = -1;
	513	goto Exit;
	514	}
	515
485d0c60	516	ret = do_cmd(argc-1, argv+1, NULL, 0);
4612d04d	517	Exit:
7901660a	518	rtnl_close(&rth);
c2f3a0f9	519
4612d04d VK	520	if (use_names)
	521	cls_names_uninit();
	522
c2f3a0f9	523	return ret;
aba5acdf	524	}