[mirror_iproute2.git] / tc / f_route.c

/*
 * f_route.c		ROUTE 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 <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>

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

static void explain(void)
{
	fprintf(stderr,
		"Usage: ... route [ from REALM | fromif TAG ] [ to REALM ]\n"
		"                [ classid CLASSID ] [ action ACTION_SPEC ]\n"
		"       ACTION_SPEC := ... look at individual actions\n"
		"       CLASSID := X:Y\n"
		"\n"
		"NOTE: CLASSID is parsed as hexadecimal input.\n");
}

static int route_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n)
{
	struct tcmsg *t = NLMSG_DATA(n);
	struct rtattr *tail;
	__u32 fh = 0xFFFF8000;
	__u32 order = 0;

	if (handle) {
		if (get_u32(&t->tcm_handle, handle, 0)) {
			fprintf(stderr, "Illegal \"handle\"\n");
			return -1;
		}
	}

	if (argc == 0)
		return 0;

	tail = addattr_nest(n, 4096, TCA_OPTIONS);

	while (argc > 0) {
		if (matches(*argv, "to") == 0) {
			__u32 id;

			NEXT_ARG();
			if (rtnl_rtrealm_a2n(&id, *argv)) {
				fprintf(stderr, "Illegal \"to\"\n");
				return -1;
			}
			addattr_l(n, 4096, TCA_ROUTE4_TO, &id, 4);
			fh &= ~0x80FF;
			fh |= id&0xFF;
		} else if (matches(*argv, "from") == 0) {
			__u32 id;

			NEXT_ARG();
			if (rtnl_rtrealm_a2n(&id, *argv)) {
				fprintf(stderr, "Illegal \"from\"\n");
				return -1;
			}
			addattr_l(n, 4096, TCA_ROUTE4_FROM, &id, 4);
			fh &= 0xFFFF;
			fh |= id<<16;
		} else if (matches(*argv, "fromif") == 0) {
			__u32 id;

			NEXT_ARG();
			ll_init_map(&rth);
			if ((id = ll_name_to_index(*argv)) <= 0) {
				fprintf(stderr, "Illegal \"fromif\"\n");
				return -1;
			}
			addattr_l(n, 4096, TCA_ROUTE4_IIF, &id, 4);
			fh &= 0xFFFF;
			fh |= (0x8000|id)<<16;
		} else if (matches(*argv, "classid") == 0 ||
			   strcmp(*argv, "flowid") == 0) {
			unsigned int handle;

			NEXT_ARG();
			if (get_tc_classid(&handle, *argv)) {
				fprintf(stderr, "Illegal \"classid\"\n");
				return -1;
			}
			addattr_l(n, 4096, TCA_ROUTE4_CLASSID, &handle, 4);
		} else if (matches(*argv, "police") == 0) {
			NEXT_ARG();
			if (parse_police(&argc, &argv, TCA_ROUTE4_POLICE, n)) {
				fprintf(stderr, "Illegal \"police\"\n");
				return -1;
			}
			continue;
		} else if (matches(*argv, "action") == 0) {
			NEXT_ARG();
			if (parse_action(&argc, &argv, TCA_ROUTE4_ACT, n)) {
				fprintf(stderr, "Illegal \"action\"\n");
				return -1;
			}
			continue;
		} else if (matches(*argv, "order") == 0) {
			NEXT_ARG();
			if (get_u32(&order, *argv, 0)) {
				fprintf(stderr, "Illegal \"order\"\n");
				return -1;
			}
		} else if (strcmp(*argv, "help") == 0) {
			explain();
			return -1;
		} else {
			fprintf(stderr, "What is \"%s\"?\n", *argv);
			explain();
			return -1;
		}
		argc--; argv++;
	}
	addattr_nest_end(n, tail);
	if (order) {
		fh &= ~0x7F00;
		fh |= (order<<8)&0x7F00;
	}
	if (!t->tcm_handle)
		t->tcm_handle = fh;
	return 0;
}

static int route_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 handle)
{
	struct rtattr *tb[TCA_ROUTE4_MAX+1];

	SPRINT_BUF(b1);

	if (opt == NULL)
		return 0;

	parse_rtattr_nested(tb, TCA_ROUTE4_MAX, opt);

	if (handle)
		fprintf(f, "fh 0x%08x ", handle);
	if (handle&0x7F00)
		fprintf(f, "order %d ", (handle>>8)&0x7F);

	if (tb[TCA_ROUTE4_CLASSID]) {
		SPRINT_BUF(b1);
		fprintf(f, "flowid %s ", sprint_tc_classid(rta_getattr_u32(tb[TCA_ROUTE4_CLASSID]), b1));
	}
	if (tb[TCA_ROUTE4_TO])
		fprintf(f, "to %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_TO]), b1, sizeof(b1)));
	if (tb[TCA_ROUTE4_FROM])
		fprintf(f, "from %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_FROM]), b1, sizeof(b1)));
	if (tb[TCA_ROUTE4_IIF])
		fprintf(f, "fromif %s", ll_index_to_name(rta_getattr_u32(tb[TCA_ROUTE4_IIF])));
	if (tb[TCA_ROUTE4_POLICE])
		tc_print_police(f, tb[TCA_ROUTE4_POLICE]);
	if (tb[TCA_ROUTE4_ACT])
		tc_print_action(f, tb[TCA_ROUTE4_ACT], 0);
	return 0;
}

struct filter_util route_filter_util = {
	.id = "route",
	.parse_fopt = route_parse_opt,
	.print_fopt = route_print_opt,
};
Commit	Line	Data
aba5acdf SH	1	/*
	2	* f_route.c ROUTE 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>
aba5acdf SH	16	#include <fcntl.h>
	17	#include <sys/socket.h>
	18	#include <netinet/in.h>
	19	#include <arpa/inet.h>
	20	#include <string.h>
	21
	22	#include "utils.h"
	23	#include "rt_names.h"
c1027a75	24	#include "tc_common.h"
aba5acdf SH	25	#include "tc_util.h"
	26
	27	static void explain(void)
	28	{
8589eb4e MC	29	fprintf(stderr,
	30	"Usage: ... route [ from REALM \| fromif TAG ] [ to REALM ]\n"
	31	" [ classid CLASSID ] [ action ACTION_SPEC ]\n"
	32	" ACTION_SPEC := ... look at individual actions\n"
	33	" CLASSID := X:Y\n"
	34	"\n"
	35	"NOTE: CLASSID is parsed as hexadecimal input.\n");
aba5acdf SH	36	}
aba5acdf SH	37
aba5acdf SH	38	static int route_parse_opt(struct filter_util qu, char handle, int argc, char *argv, struct nlmsghdr n)
aba5acdf SH	39	{
aba5acdf SH	40	struct tcmsg *t = NLMSG_DATA(n);
	41	struct rtattr *tail;
	42	__u32 fh = 0xFFFF8000;
	43	__u32 order = 0;
	44
aba5acdf SH	45	if (handle) {
	46	if (get_u32(&t->tcm_handle, handle, 0)) {
	47	fprintf(stderr, "Illegal \"handle\"\n");
	48	return -1;
	49	}
	50	}
	51
	52	if (argc == 0)
	53	return 0;
	54
c14f9d92	55	tail = addattr_nest(n, 4096, TCA_OPTIONS);
aba5acdf SH	56
	57	while (argc > 0) {
	58	if (matches(*argv, "to") == 0) {
	59	__u32 id;
32a121cb	60
aba5acdf SH	61	NEXT_ARG();
	62	if (rtnl_rtrealm_a2n(&id, *argv)) {
	63	fprintf(stderr, "Illegal \"to\"\n");
	64	return -1;
	65	}
	66	addattr_l(n, 4096, TCA_ROUTE4_TO, &id, 4);
	67	fh &= ~0x80FF;
	68	fh \|= id&0xFF;
	69	} else if (matches(*argv, "from") == 0) {
	70	__u32 id;
32a121cb	71
aba5acdf SH	72	NEXT_ARG();
	73	if (rtnl_rtrealm_a2n(&id, *argv)) {
	74	fprintf(stderr, "Illegal \"from\"\n");
	75	return -1;
	76	}
	77	addattr_l(n, 4096, TCA_ROUTE4_FROM, &id, 4);
	78	fh &= 0xFFFF;
	79	fh \|= id<<16;
	80	} else if (matches(*argv, "fromif") == 0) {
aba5acdf	81	__u32 id;
32a121cb	82
aba5acdf	83	NEXT_ARG();
c1027a75	84	ll_init_map(&rth);
32a121cb	85	if ((id = ll_name_to_index(*argv)) <= 0) {
aba5acdf SH	86	fprintf(stderr, "Illegal \"fromif\"\n");
	87	return -1;
	88	}
	89	addattr_l(n, 4096, TCA_ROUTE4_IIF, &id, 4);
	90	fh &= 0xFFFF;
	91	fh \|= (0x8000\|id)<<16;
	92	} else if (matches(*argv, "classid") == 0 \|\|
	93	strcmp(*argv, "flowid") == 0) {
32a121cb SH	94	unsigned int handle;
32a121cb SH	95
aba5acdf SH	96	NEXT_ARG();
	97	if (get_tc_classid(&handle, *argv)) {
	98	fprintf(stderr, "Illegal \"classid\"\n");
	99	return -1;
	100	}
	101	addattr_l(n, 4096, TCA_ROUTE4_CLASSID, &handle, 4);
	102	} else if (matches(*argv, "police") == 0) {
	103	NEXT_ARG();
	104	if (parse_police(&argc, &argv, TCA_ROUTE4_POLICE, n)) {
	105	fprintf(stderr, "Illegal \"police\"\n");
	106	return -1;
	107	}
	108	continue;
287bf3a9 JHS	109	} else if (matches(*argv, "action") == 0) {
	110	NEXT_ARG();
	111	if (parse_action(&argc, &argv, TCA_ROUTE4_ACT, n)) {
	112	fprintf(stderr, "Illegal \"action\"\n");
	113	return -1;
	114	}
	115	continue;
aba5acdf SH	116	} else if (matches(*argv, "order") == 0) {
	117	NEXT_ARG();
	118	if (get_u32(&order, *argv, 0)) {
	119	fprintf(stderr, "Illegal \"order\"\n");
	120	return -1;
	121	}
	122	} else if (strcmp(*argv, "help") == 0) {
	123	explain();
	124	return -1;
	125	} else {
	126	fprintf(stderr, "What is \"%s\"?\n", *argv);
	127	explain();
	128	return -1;
	129	}
	130	argc--; argv++;
	131	}
c14f9d92	132	addattr_nest_end(n, tail);
aba5acdf SH	133	if (order) {
	134	fh &= ~0x7F00;
	135	fh \|= (order<<8)&0x7F00;
	136	}
	137	if (!t->tcm_handle)
	138	t->tcm_handle = fh;
	139	return 0;
	140	}
	141
	142	static int route_print_opt(struct filter_util qu, FILE f, struct rtattr *opt, __u32 handle)
	143	{
	144	struct rtattr *tb[TCA_ROUTE4_MAX+1];
32a121cb	145
aba5acdf SH	146	SPRINT_BUF(b1);
	147
	148	if (opt == NULL)
	149	return 0;
	150
3b3ecd31	151	parse_rtattr_nested(tb, TCA_ROUTE4_MAX, opt);
aba5acdf SH	152
	153	if (handle)
	154	fprintf(f, "fh 0x%08x ", handle);
	155	if (handle&0x7F00)
	156	fprintf(f, "order %d ", (handle>>8)&0x7F);
	157
	158	if (tb[TCA_ROUTE4_CLASSID]) {
	159	SPRINT_BUF(b1);
ff24746c	160	fprintf(f, "flowid %s ", sprint_tc_classid(rta_getattr_u32(tb[TCA_ROUTE4_CLASSID]), b1));
aba5acdf SH	161	}
aba5acdf SH	162	if (tb[TCA_ROUTE4_TO])
ff24746c	163	fprintf(f, "to %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_TO]), b1, sizeof(b1)));
aba5acdf	164	if (tb[TCA_ROUTE4_FROM])
ff24746c	165	fprintf(f, "from %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_FROM]), b1, sizeof(b1)));
aba5acdf	166	if (tb[TCA_ROUTE4_IIF])
9f1370c0	167	fprintf(f, "fromif %s", ll_index_to_name(rta_getattr_u32(tb[TCA_ROUTE4_IIF])));
aba5acdf SH	168	if (tb[TCA_ROUTE4_POLICE])
aba5acdf SH	169	tc_print_police(f, tb[TCA_ROUTE4_POLICE]);
287bf3a9	170	if (tb[TCA_ROUTE4_ACT])
9e713525	171	tc_print_action(f, tb[TCA_ROUTE4_ACT], 0);
aba5acdf SH	172	return 0;
	173	}
	174
6b7dff17 SH	175	struct filter_util route_filter_util = {
	176	.id = "route",
	177	.parse_fopt = route_parse_opt,
	178	.print_fopt = route_print_opt,
aba5acdf	179	};