[mirror_iproute2.git] / tc / tc_filter.c

/*
 * tc_filter.c		"tc filter".
 *
 *		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>
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <linux/if_ether.h>

#include "rt_names.h"
#include "utils.h"
#include "tc_util.h"
#include "tc_common.h"

static void usage(void)
{
	fprintf(stderr, "Usage: tc filter [ add | del | change | replace | show ] dev STRING\n");
	fprintf(stderr, "       [ pref PRIO ] protocol PROTO\n");
	fprintf(stderr, "       [ estimator INTERVAL TIME_CONSTANT ]\n");
	fprintf(stderr, "       [ root | ingress | egress | parent CLASSID ]\n");
	fprintf(stderr, "       [ handle FILTERID ] [ [ FILTER_TYPE ] [ help | OPTIONS ] ]\n");
	fprintf(stderr, "\n");
	fprintf(stderr, "       tc filter show [ dev STRING ] [ root | ingress | egress | parent CLASSID ]\n");
	fprintf(stderr, "Where:\n");
	fprintf(stderr, "FILTER_TYPE := { rsvp | u32 | bpf | fw | route | etc. }\n");
	fprintf(stderr, "FILTERID := ... format depends on classifier, see there\n");
	fprintf(stderr, "OPTIONS := ... try tc filter add <desired FILTER_KIND> help\n");
}

static int tc_filter_modify(int cmd, unsigned flags, int argc, char **argv)
{
	struct {
		struct nlmsghdr 	n;
		struct tcmsg 		t;
		char   			buf[MAX_MSG];
	} req;
	struct filter_util *q = NULL;
	__u32 prio = 0;
	__u32 protocol = 0;
	int protocol_set = 0;
	char *fhandle = NULL;
	char  d[16];
	char  k[16];
	struct tc_estimator est;

	memset(&req, 0, sizeof(req));
	memset(&est, 0, sizeof(est));
	memset(d, 0, sizeof(d));
	memset(k, 0, sizeof(k));
	memset(&req, 0, sizeof(req));

	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg));
	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
	req.n.nlmsg_type = cmd;
	req.t.tcm_family = AF_UNSPEC;

	if (cmd == RTM_NEWTFILTER && flags & NLM_F_CREATE)
		protocol = htons(ETH_P_ALL);

	while (argc > 0) {
		if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			if (d[0])
				duparg("dev", *argv);
			strncpy(d, *argv, sizeof(d)-1);
		} else if (strcmp(*argv, "root") == 0) {
			if (req.t.tcm_parent) {
				fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
				return -1;
			}
			req.t.tcm_parent = TC_H_ROOT;
		} else if (strcmp(*argv, "ingress") == 0) {
			if (req.t.tcm_parent) {
				fprintf(stderr, "Error: \"ingress\" is duplicate parent ID\n");
				return -1;
			}
			req.t.tcm_parent = TC_H_MAKE(TC_H_CLSACT,
						     TC_H_MIN_INGRESS);
		} else if (strcmp(*argv, "egress") == 0) {
			if (req.t.tcm_parent) {
				fprintf(stderr, "Error: \"egress\" is duplicate parent ID\n");
				return -1;
			}
			req.t.tcm_parent = TC_H_MAKE(TC_H_CLSACT,
						     TC_H_MIN_EGRESS);
		} else if (strcmp(*argv, "parent") == 0) {
			__u32 handle;
			NEXT_ARG();
			if (req.t.tcm_parent)
				duparg("parent", *argv);
			if (get_tc_classid(&handle, *argv))
				invarg("Invalid parent ID", *argv);
			req.t.tcm_parent = handle;
		} else if (strcmp(*argv, "handle") == 0) {
			NEXT_ARG();
			if (fhandle)
				duparg("handle", *argv);
			fhandle = *argv;
		} else if (matches(*argv, "preference") == 0 ||
			   matches(*argv, "priority") == 0) {
			NEXT_ARG();
			if (prio)
				duparg("priority", *argv);
			if (get_u32(&prio, *argv, 0) || prio > 0xFFFF)
				invarg("invalid priority value", *argv);
		} else if (matches(*argv, "protocol") == 0) {
			__u16 id;
			NEXT_ARG();
			if (protocol_set)
				duparg("protocol", *argv);
			if (ll_proto_a2n(&id, *argv))
				invarg("invalid protocol", *argv);
			protocol = id;
			protocol_set = 1;
		} else if (matches(*argv, "estimator") == 0) {
			if (parse_estimator(&argc, &argv, &est) < 0)
				return -1;
		} else if (matches(*argv, "help") == 0) {
			usage();
			return 0;
		} else {
			strncpy(k, *argv, sizeof(k)-1);

			q = get_filter_kind(k);
			argc--; argv++;
			break;
		}

		argc--; argv++;
	}

	req.t.tcm_info = TC_H_MAKE(prio<<16, protocol);

	if (k[0])
		addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1);

	if (q) {
		if (q->parse_fopt(q, fhandle, argc, argv, &req.n))
			return 1;
	} else {
		if (fhandle) {
			fprintf(stderr, "Must specify filter type when using "
				"\"handle\"\n");
			return -1;
		}
		if (argc) {
			if (matches(*argv, "help") == 0)
				usage();
			fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc filter help\".\n", *argv);
			return -1;
		}
	}
	if (est.ewma_log)
		addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est));


	if (d[0])  {
		ll_init_map(&rth);

		if ((req.t.tcm_ifindex = ll_name_to_index(d)) == 0) {
			fprintf(stderr, "Cannot find device \"%s\"\n", d);
			return 1;
		}
	}

	if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) {
		fprintf(stderr, "We have an error talking to the kernel\n");
		return 2;
	}

	return 0;
}

static __u32 filter_parent;
static int filter_ifindex;
static __u32 filter_prio;
static __u32 filter_protocol;
__u16 f_proto = 0;

int print_filter(const struct sockaddr_nl *who,
			struct nlmsghdr *n,
			void *arg)
{
	FILE *fp = (FILE*)arg;
	struct tcmsg *t = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	struct rtattr * tb[TCA_MAX+1];
	struct filter_util *q;
	char abuf[256];

	if (n->nlmsg_type != RTM_NEWTFILTER && n->nlmsg_type != RTM_DELTFILTER) {
		fprintf(stderr, "Not a filter\n");
		return 0;
	}
	len -= NLMSG_LENGTH(sizeof(*t));
	if (len < 0) {
		fprintf(stderr, "Wrong len %d\n", len);
		return -1;
	}

	memset(tb, 0, sizeof(tb));
	parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);

	if (tb[TCA_KIND] == NULL) {
		fprintf(stderr, "print_filter: NULL kind\n");
		return -1;
	}

	if (n->nlmsg_type == RTM_DELTFILTER)
		fprintf(fp, "deleted ");

	fprintf(fp, "filter ");
	if (!filter_ifindex || filter_ifindex != t->tcm_ifindex)
		fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex));

	if (!filter_parent || filter_parent != t->tcm_parent) {
		if (t->tcm_parent == TC_H_ROOT)
			fprintf(fp, "root ");
		else if (t->tcm_parent == TC_H_MAKE(TC_H_CLSACT, TC_H_MIN_INGRESS))
			fprintf(fp, "ingress ");
		else if (t->tcm_parent == TC_H_MAKE(TC_H_CLSACT, TC_H_MIN_EGRESS))
			fprintf(fp, "egress ");
		else {
			print_tc_classid(abuf, sizeof(abuf), t->tcm_parent);
			fprintf(fp, "parent %s ", abuf);
		}
	}

	if (t->tcm_info) {
		f_proto = TC_H_MIN(t->tcm_info);
		__u32 prio = TC_H_MAJ(t->tcm_info)>>16;
		if (!filter_protocol || filter_protocol != f_proto) {
			if (f_proto) {
				SPRINT_BUF(b1);
				fprintf(fp, "protocol %s ",
					ll_proto_n2a(f_proto, b1, sizeof(b1)));
			}
		}
		if (!filter_prio || filter_prio != prio) {
			if (prio)
				fprintf(fp, "pref %u ", prio);
		}
	}
	fprintf(fp, "%s ", rta_getattr_str(tb[TCA_KIND]));
	q = get_filter_kind(RTA_DATA(tb[TCA_KIND]));
	if (tb[TCA_OPTIONS]) {
		if (q)
			q->print_fopt(q, fp, tb[TCA_OPTIONS], t->tcm_handle);
		else
			fprintf(fp, "[cannot parse parameters]");
	}
	fprintf(fp, "\n");

	if (show_stats && (tb[TCA_STATS] || tb[TCA_STATS2])) {
		print_tcstats_attr(fp, tb, " ", NULL);
		fprintf(fp, "\n");
	}

	fflush(fp);
	return 0;
}

static int tc_filter_list(int argc, char **argv)
{
	struct tcmsg t;
	char d[16];
	__u32 prio = 0;
	__u32 protocol = 0;
	char *fhandle = NULL;

	memset(&t, 0, sizeof(t));
	t.tcm_family = AF_UNSPEC;
	memset(d, 0, sizeof(d));

	while (argc > 0) {
		if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			if (d[0])
				duparg("dev", *argv);
			strncpy(d, *argv, sizeof(d)-1);
		} else if (strcmp(*argv, "root") == 0) {
			if (t.tcm_parent) {
				fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
				return -1;
			}
			filter_parent = t.tcm_parent = TC_H_ROOT;
		} else if (strcmp(*argv, "ingress") == 0) {
			if (t.tcm_parent) {
				fprintf(stderr, "Error: \"ingress\" is duplicate parent ID\n");
				return -1;
			}
			filter_parent = TC_H_MAKE(TC_H_CLSACT,
						  TC_H_MIN_INGRESS);
			t.tcm_parent = filter_parent;
		} else if (strcmp(*argv, "egress") == 0) {
			if (t.tcm_parent) {
				fprintf(stderr, "Error: \"egress\" is duplicate parent ID\n");
				return -1;
			}
			filter_parent = TC_H_MAKE(TC_H_CLSACT,
						  TC_H_MIN_EGRESS);
			t.tcm_parent = filter_parent;
		} else if (strcmp(*argv, "parent") == 0) {
			__u32 handle;
			NEXT_ARG();
			if (t.tcm_parent)
				duparg("parent", *argv);
			if (get_tc_classid(&handle, *argv))
				invarg("invalid parent ID", *argv);
			filter_parent = t.tcm_parent = handle;
		} else if (strcmp(*argv, "handle") == 0) {
			NEXT_ARG();
			if (fhandle)
				duparg("handle", *argv);
			fhandle = *argv;
		} else if (matches(*argv, "preference") == 0 ||
			   matches(*argv, "priority") == 0) {
			NEXT_ARG();
			if (prio)
				duparg("priority", *argv);
			if (get_u32(&prio, *argv, 0))
				invarg("invalid preference", *argv);
			filter_prio = prio;
		} else if (matches(*argv, "protocol") == 0) {
			__u16 res;
			NEXT_ARG();
			if (protocol)
				duparg("protocol", *argv);
			if (ll_proto_a2n(&res, *argv))
				invarg("invalid protocol", *argv);
			protocol = res;
			filter_protocol = protocol;
		} else if (matches(*argv, "help") == 0) {
			usage();
		} else {
			fprintf(stderr, " What is \"%s\"? Try \"tc filter help\"\n", *argv);
			return -1;
		}

		argc--; argv++;
	}

	t.tcm_info = TC_H_MAKE(prio<<16, protocol);

	ll_init_map(&rth);

	if (d[0]) {
		if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) {
			fprintf(stderr, "Cannot find device \"%s\"\n", d);
			return 1;
		}
		filter_ifindex = t.tcm_ifindex;
	}

	if (rtnl_dump_request(&rth, RTM_GETTFILTER, &t, sizeof(t)) < 0) {
		perror("Cannot send dump request");
		return 1;
	}

	if (rtnl_dump_filter(&rth, print_filter, stdout) < 0) {
		fprintf(stderr, "Dump terminated\n");
		return 1;
	}

	return 0;
}

int do_filter(int argc, char **argv)
{
	if (argc < 1)
		return tc_filter_list(0, NULL);
	if (matches(*argv, "add") == 0)
		return tc_filter_modify(RTM_NEWTFILTER, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1);
	if (matches(*argv, "change") == 0)
		return tc_filter_modify(RTM_NEWTFILTER, 0, argc-1, argv+1);
	if (matches(*argv, "replace") == 0)
		return tc_filter_modify(RTM_NEWTFILTER, NLM_F_CREATE, argc-1, argv+1);
	if (matches(*argv, "delete") == 0)
		return tc_filter_modify(RTM_DELTFILTER, 0,  argc-1, argv+1);
#if 0
	if (matches(*argv, "get") == 0)
		return tc_filter_get(RTM_GETTFILTER, 0,  argc-1, argv+1);
#endif
	if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
	    || matches(*argv, "lst") == 0)
		return tc_filter_list(argc-1, argv+1);
	if (matches(*argv, "help") == 0) {
		usage();
		return 0;
        }
	fprintf(stderr, "Command \"%s\" is unknown, try \"tc filter help\".\n", *argv);
	return -1;
}
Commit	Line	Data
aba5acdf SH	1	/*
	2	* tc_filter.c "tc filter".
	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	*/
	12
	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <unistd.h>
	16	#include <syslog.h>
	17	#include <fcntl.h>
aba5acdf SH	18	#include <sys/socket.h>
	19	#include <netinet/in.h>
	20	#include <arpa/inet.h>
	21	#include <string.h>
	22	#include <linux/if_ether.h>
	23
	24	#include "rt_names.h"
	25	#include "utils.h"
	26	#include "tc_util.h"
	27	#include "tc_common.h"
	28
aba5acdf SH	29	static void usage(void)
aba5acdf SH	30	{
e5d179d8	31	fprintf(stderr, "Usage: tc filter [ add \| del \| change \| replace \| show ] dev STRING\n");
de33a430	32	fprintf(stderr, " [ pref PRIO ] protocol PROTO\n");
aba5acdf	33	fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n");
8f9afdd5 DB	34	fprintf(stderr, " [ root \| ingress \| egress \| parent CLASSID ]\n");
8f9afdd5 DB	35	fprintf(stderr, " [ handle FILTERID ] [ [ FILTER_TYPE ] [ help \| OPTIONS ] ]\n");
aba5acdf	36	fprintf(stderr, "\n");
8f9afdd5	37	fprintf(stderr, " tc filter show [ dev STRING ] [ root \| ingress \| egress \| parent CLASSID ]\n");
aba5acdf	38	fprintf(stderr, "Where:\n");
4bd62446	39	fprintf(stderr, "FILTER_TYPE := { rsvp \| u32 \| bpf \| fw \| route \| etc. }\n");
aba5acdf SH	40	fprintf(stderr, "FILTERID := ... format depends on classifier, see there\n");
aba5acdf SH	41	fprintf(stderr, "OPTIONS := ... try tc filter add <desired FILTER_KIND> help\n");
aba5acdf SH	42	}
aba5acdf SH	43
d1f28cf1	44	static int tc_filter_modify(int cmd, unsigned flags, int argc, char **argv)
aba5acdf	45	{
aba5acdf SH	46	struct {
	47	struct nlmsghdr n;
	48	struct tcmsg t;
2373fde9	49	char buf[MAX_MSG];
aba5acdf SH	50	} req;
	51	struct filter_util *q = NULL;
	52	__u32 prio = 0;
ae761068	53	__u32 protocol = 0;
083a5f00	54	int protocol_set = 0;
aba5acdf SH	55	char *fhandle = NULL;
	56	char d[16];
	57	char k[16];
	58	struct tc_estimator est;
	59
	60	memset(&req, 0, sizeof(req));
	61	memset(&est, 0, sizeof(est));
	62	memset(d, 0, sizeof(d));
	63	memset(k, 0, sizeof(k));
	64	memset(&req, 0, sizeof(req));
	65
	66	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg));
	67	req.n.nlmsg_flags = NLM_F_REQUEST\|flags;
	68	req.n.nlmsg_type = cmd;
	69	req.t.tcm_family = AF_UNSPEC;
	70
ae761068	71	if (cmd == RTM_NEWTFILTER && flags & NLM_F_CREATE)
05fb9184	72	protocol = htons(ETH_P_ALL);
ae761068	73
aba5acdf SH	74	while (argc > 0) {
	75	if (strcmp(*argv, "dev") == 0) {
	76	NEXT_ARG();
	77	if (d[0])
	78	duparg("dev", *argv);
	79	strncpy(d, *argv, sizeof(d)-1);
	80	} else if (strcmp(*argv, "root") == 0) {
	81	if (req.t.tcm_parent) {
	82	fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
024481bb	83	return -1;
aba5acdf SH	84	}
aba5acdf SH	85	req.t.tcm_parent = TC_H_ROOT;
8f9afdd5 DB	86	} else if (strcmp(*argv, "ingress") == 0) {
	87	if (req.t.tcm_parent) {
	88	fprintf(stderr, "Error: \"ingress\" is duplicate parent ID\n");
	89	return -1;
	90	}
	91	req.t.tcm_parent = TC_H_MAKE(TC_H_CLSACT,
	92	TC_H_MIN_INGRESS);
	93	} else if (strcmp(*argv, "egress") == 0) {
	94	if (req.t.tcm_parent) {
	95	fprintf(stderr, "Error: \"egress\" is duplicate parent ID\n");
	96	return -1;
	97	}
	98	req.t.tcm_parent = TC_H_MAKE(TC_H_CLSACT,
	99	TC_H_MIN_EGRESS);
aba5acdf SH	100	} else if (strcmp(*argv, "parent") == 0) {
	101	__u32 handle;
	102	NEXT_ARG();
	103	if (req.t.tcm_parent)
	104	duparg("parent", *argv);
	105	if (get_tc_classid(&handle, *argv))
f1675d61	106	invarg("Invalid parent ID", *argv);
aba5acdf SH	107	req.t.tcm_parent = handle;
	108	} else if (strcmp(*argv, "handle") == 0) {
	109	NEXT_ARG();
	110	if (fhandle)
	111	duparg("handle", *argv);
	112	fhandle = *argv;
	113	} else if (matches(*argv, "preference") == 0 \|\|
	114	matches(*argv, "priority") == 0) {
	115	NEXT_ARG();
	116	if (prio)
	117	duparg("priority", *argv);
424adc19	118	if (get_u32(&prio, *argv, 0) \|\| prio > 0xFFFF)
f1675d61	119	invarg("invalid priority value", *argv);
aba5acdf SH	120	} else if (matches(*argv, "protocol") == 0) {
	121	__u16 id;
	122	NEXT_ARG();
083a5f00	123	if (protocol_set)
aba5acdf SH	124	duparg("protocol", *argv);
aba5acdf SH	125	if (ll_proto_a2n(&id, *argv))
f1675d61	126	invarg("invalid protocol", *argv);
aba5acdf	127	protocol = id;
083a5f00	128	protocol_set = 1;
aba5acdf SH	129	} else if (matches(*argv, "estimator") == 0) {
	130	if (parse_estimator(&argc, &argv, &est) < 0)
	131	return -1;
	132	} else if (matches(*argv, "help") == 0) {
	133	usage();
3a99df70	134	return 0;
aba5acdf SH	135	} else {
	136	strncpy(k, *argv, sizeof(k)-1);
	137
	138	q = get_filter_kind(k);
	139	argc--; argv++;
	140	break;
	141	}
	142
	143	argc--; argv++;
	144	}
	145
	146	req.t.tcm_info = TC_H_MAKE(prio<<16, protocol);
	147
	148	if (k[0])
	149	addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1);
	150
	151	if (q) {
	152	if (q->parse_fopt(q, fhandle, argc, argv, &req.n))
024481bb	153	return 1;
aba5acdf SH	154	} else {
	155	if (fhandle) {
	156	fprintf(stderr, "Must specify filter type when using "
	157	"\"handle\"\n");
024481bb	158	return -1;
aba5acdf SH	159	}
	160	if (argc) {
	161	if (matches(*argv, "help") == 0)
	162	usage();
	163	fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc filter help\".\n", *argv);
024481bb	164	return -1;
aba5acdf SH	165	}
	166	}
	167	if (est.ewma_log)
	168	addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est));
	169
aba5acdf SH	170
aba5acdf SH	171	if (d[0]) {
3d0b7439	172	ll_init_map(&rth);
aba5acdf SH	173
	174	if ((req.t.tcm_ifindex = ll_name_to_index(d)) == 0) {
	175	fprintf(stderr, "Cannot find device \"%s\"\n", d);
024481bb	176	return 1;
aba5acdf SH	177	}
	178	}
	179
c079e121	180	if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) {
2373fde9	181	fprintf(stderr, "We have an error talking to the kernel\n");
024481bb	182	return 2;
2373fde9	183	}
aba5acdf	184
aba5acdf SH	185	return 0;
	186	}
	187
	188	static __u32 filter_parent;
	189	static int filter_ifindex;
	190	static __u32 filter_prio;
	191	static __u32 filter_protocol;
eefcbc72	192	__u16 f_proto = 0;
aba5acdf	193
5bec3484	194	int print_filter(const struct sockaddr_nl *who,
ae665a52	195	struct nlmsghdr *n,
de481780	196	void *arg)
aba5acdf SH	197	{
	198	FILE fp = (FILE)arg;
	199	struct tcmsg *t = NLMSG_DATA(n);
	200	int len = n->nlmsg_len;
	201	struct rtattr * tb[TCA_MAX+1];
	202	struct filter_util *q;
	203	char abuf[256];
	204
	205	if (n->nlmsg_type != RTM_NEWTFILTER && n->nlmsg_type != RTM_DELTFILTER) {
	206	fprintf(stderr, "Not a filter\n");
	207	return 0;
	208	}
	209	len -= NLMSG_LENGTH(sizeof(*t));
	210	if (len < 0) {
	211	fprintf(stderr, "Wrong len %d\n", len);
	212	return -1;
	213	}
	214
	215	memset(tb, 0, sizeof(tb));
	216	parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len);
	217
	218	if (tb[TCA_KIND] == NULL) {
2373fde9	219	fprintf(stderr, "print_filter: NULL kind\n");
aba5acdf SH	220	return -1;
	221	}
	222
	223	if (n->nlmsg_type == RTM_DELTFILTER)
	224	fprintf(fp, "deleted ");
	225
	226	fprintf(fp, "filter ");
	227	if (!filter_ifindex \|\| filter_ifindex != t->tcm_ifindex)
	228	fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex));
	229
	230	if (!filter_parent \|\| filter_parent != t->tcm_parent) {
	231	if (t->tcm_parent == TC_H_ROOT)
	232	fprintf(fp, "root ");
8f9afdd5 DB	233	else if (t->tcm_parent == TC_H_MAKE(TC_H_CLSACT, TC_H_MIN_INGRESS))
	234	fprintf(fp, "ingress ");
	235	else if (t->tcm_parent == TC_H_MAKE(TC_H_CLSACT, TC_H_MIN_EGRESS))
	236	fprintf(fp, "egress ");
aba5acdf SH	237	else {
	238	print_tc_classid(abuf, sizeof(abuf), t->tcm_parent);
	239	fprintf(fp, "parent %s ", abuf);
	240	}
	241	}
8f9afdd5	242
aba5acdf	243	if (t->tcm_info) {
eefcbc72	244	f_proto = TC_H_MIN(t->tcm_info);
aba5acdf	245	__u32 prio = TC_H_MAJ(t->tcm_info)>>16;
eefcbc72	246	if (!filter_protocol \|\| filter_protocol != f_proto) {
eefcbc72	247	if (f_proto) {
aba5acdf SH	248	SPRINT_BUF(b1);
aba5acdf SH	249	fprintf(fp, "protocol %s ",
eefcbc72	250	ll_proto_n2a(f_proto, b1, sizeof(b1)));
aba5acdf SH	251	}
	252	}
	253	if (!filter_prio \|\| filter_prio != prio) {
	254	if (prio)
	255	fprintf(fp, "pref %u ", prio);
	256	}
	257	}
ff24746c	258	fprintf(fp, "%s ", rta_getattr_str(tb[TCA_KIND]));
aba5acdf SH	259	q = get_filter_kind(RTA_DATA(tb[TCA_KIND]));
	260	if (tb[TCA_OPTIONS]) {
	261	if (q)
	262	q->print_fopt(q, fp, tb[TCA_OPTIONS], t->tcm_handle);
	263	else
	264	fprintf(fp, "[cannot parse parameters]");
	265	}
	266	fprintf(fp, "\n");
	267
e5879dc6	268	if (show_stats && (tb[TCA_STATS] \|\| tb[TCA_STATS2])) {
e5879dc6	269	print_tcstats_attr(fp, tb, " ", NULL);
de481780	270	fprintf(fp, "\n");
aba5acdf	271	}
de481780	272
aba5acdf SH	273	fflush(fp);
	274	return 0;
	275	}
	276
d1f28cf1	277	static int tc_filter_list(int argc, char **argv)
aba5acdf SH	278	{
aba5acdf SH	279	struct tcmsg t;
aba5acdf SH	280	char d[16];
	281	__u32 prio = 0;
	282	__u32 protocol = 0;
	283	char *fhandle = NULL;
	284
	285	memset(&t, 0, sizeof(t));
	286	t.tcm_family = AF_UNSPEC;
	287	memset(d, 0, sizeof(d));
	288
	289	while (argc > 0) {
	290	if (strcmp(*argv, "dev") == 0) {
	291	NEXT_ARG();
	292	if (d[0])
	293	duparg("dev", *argv);
	294	strncpy(d, *argv, sizeof(d)-1);
	295	} else if (strcmp(*argv, "root") == 0) {
	296	if (t.tcm_parent) {
	297	fprintf(stderr, "Error: \"root\" is duplicate parent ID\n");
024481bb	298	return -1;
aba5acdf SH	299	}
aba5acdf SH	300	filter_parent = t.tcm_parent = TC_H_ROOT;
8f9afdd5 DB	301	} else if (strcmp(*argv, "ingress") == 0) {
	302	if (t.tcm_parent) {
	303	fprintf(stderr, "Error: \"ingress\" is duplicate parent ID\n");
	304	return -1;
	305	}
	306	filter_parent = TC_H_MAKE(TC_H_CLSACT,
	307	TC_H_MIN_INGRESS);
	308	t.tcm_parent = filter_parent;
	309	} else if (strcmp(*argv, "egress") == 0) {
	310	if (t.tcm_parent) {
	311	fprintf(stderr, "Error: \"egress\" is duplicate parent ID\n");
	312	return -1;
	313	}
	314	filter_parent = TC_H_MAKE(TC_H_CLSACT,
	315	TC_H_MIN_EGRESS);
	316	t.tcm_parent = filter_parent;
aba5acdf SH	317	} else if (strcmp(*argv, "parent") == 0) {
	318	__u32 handle;
	319	NEXT_ARG();
	320	if (t.tcm_parent)
	321	duparg("parent", *argv);
	322	if (get_tc_classid(&handle, *argv))
f1675d61	323	invarg("invalid parent ID", *argv);
aba5acdf SH	324	filter_parent = t.tcm_parent = handle;
	325	} else if (strcmp(*argv, "handle") == 0) {
	326	NEXT_ARG();
	327	if (fhandle)
	328	duparg("handle", *argv);
	329	fhandle = *argv;
	330	} else if (matches(*argv, "preference") == 0 \|\|
	331	matches(*argv, "priority") == 0) {
	332	NEXT_ARG();
	333	if (prio)
	334	duparg("priority", *argv);
	335	if (get_u32(&prio, *argv, 0))
f1675d61	336	invarg("invalid preference", *argv);
aba5acdf SH	337	filter_prio = prio;
	338	} else if (matches(*argv, "protocol") == 0) {
	339	__u16 res;
	340	NEXT_ARG();
	341	if (protocol)
	342	duparg("protocol", *argv);
	343	if (ll_proto_a2n(&res, *argv))
f1675d61	344	invarg("invalid protocol", *argv);
aba5acdf SH	345	protocol = res;
	346	filter_protocol = protocol;
	347	} else if (matches(*argv, "help") == 0) {
	348	usage();
	349	} else {
	350	fprintf(stderr, " What is \"%s\"? Try \"tc filter help\"\n", *argv);
024481bb	351	return -1;
aba5acdf SH	352	}
	353
	354	argc--; argv++;
	355	}
	356
	357	t.tcm_info = TC_H_MAKE(prio<<16, protocol);
	358
3d0b7439	359	ll_init_map(&rth);
aba5acdf SH	360
	361	if (d[0]) {
	362	if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) {
	363	fprintf(stderr, "Cannot find device \"%s\"\n", d);
024481bb	364	return 1;
aba5acdf SH	365	}
	366	filter_ifindex = t.tcm_ifindex;
	367	}
	368
3d0b7439	369	if (rtnl_dump_request(&rth, RTM_GETTFILTER, &t, sizeof(t)) < 0) {
aba5acdf	370	perror("Cannot send dump request");
024481bb	371	return 1;
aba5acdf SH	372	}
aba5acdf SH	373
3d0b7439	374	if (rtnl_dump_filter(&rth, print_filter, stdout) < 0) {
aba5acdf	375	fprintf(stderr, "Dump terminated\n");
024481bb	376	return 1;
aba5acdf SH	377	}
aba5acdf SH	378
aba5acdf SH	379	return 0;
	380	}
	381
	382	int do_filter(int argc, char **argv)
	383	{
	384	if (argc < 1)
	385	return tc_filter_list(0, NULL);
	386	if (matches(*argv, "add") == 0)
	387	return tc_filter_modify(RTM_NEWTFILTER, NLM_F_EXCL\|NLM_F_CREATE, argc-1, argv+1);
	388	if (matches(*argv, "change") == 0)
	389	return tc_filter_modify(RTM_NEWTFILTER, 0, argc-1, argv+1);
	390	if (matches(*argv, "replace") == 0)
	391	return tc_filter_modify(RTM_NEWTFILTER, NLM_F_CREATE, argc-1, argv+1);
	392	if (matches(*argv, "delete") == 0)
	393	return tc_filter_modify(RTM_DELTFILTER, 0, argc-1, argv+1);
	394	#if 0
	395	if (matches(*argv, "get") == 0)
	396	return tc_filter_get(RTM_GETTFILTER, 0, argc-1, argv+1);
	397	#endif
	398	if (matches(argv, "list") == 0 \|\| matches(argv, "show") == 0
	399	\|\| matches(*argv, "lst") == 0)
	400	return tc_filter_list(argc-1, argv+1);
e5d179d8	401	if (matches(*argv, "help") == 0) {
aba5acdf	402	usage();
e5d179d8 HT	403	return 0;
e5d179d8 HT	404	}
aba5acdf	405	fprintf(stderr, "Command \"%s\" is unknown, try \"tc filter help\".\n", *argv);
024481bb	406	return -1;
aba5acdf	407	}