[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 <syslog.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");
	fprintf(stderr, "                [ classid CLASSID ] [ action ACTION_SPEC ]\n");
	fprintf(stderr, "       ACTION_SPEC := ... look at individual actions\n");
	fprintf(stderr, "       CLASSID := X:Y\n");
	fprintf(stderr, "\nNOTE: 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 tc_police tp;
	struct tcmsg *t = NLMSG_DATA(n);
	struct rtattr *tail;
	__u32 fh = 0xFFFF8000;
	__u32 order = 0;

	memset(&tp, 0, sizeof(tp));

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

	if (argc == 0)
		return 0;

	tail = NLMSG_TAIL(n);
	addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);

	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 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++;
	}
	tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) 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(*(int*)RTA_DATA(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]);
	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>
	16	#include <syslog.h>
	17	#include <fcntl.h>
	18	#include <sys/socket.h>
	19	#include <netinet/in.h>
	20	#include <arpa/inet.h>
	21	#include <string.h>
	22
	23	#include "utils.h"
	24	#include "rt_names.h"
c1027a75	25	#include "tc_common.h"
aba5acdf SH	26	#include "tc_util.h"
	27
	28	static void explain(void)
	29	{
	30	fprintf(stderr, "Usage: ... route [ from REALM \| fromif TAG ] [ to REALM ]\n");
0a83e1ea	31	fprintf(stderr, " [ classid CLASSID ] [ action ACTION_SPEC ]\n");
287bf3a9	32	fprintf(stderr, " ACTION_SPEC := ... look at individual actions\n");
aba5acdf	33	fprintf(stderr, " CLASSID := X:Y\n");
e9acc242	34	fprintf(stderr, "\nNOTE: CLASSID is parsed as hexadecimal input.\n");
aba5acdf SH	35	}
aba5acdf SH	36
aba5acdf SH	37	static int route_parse_opt(struct filter_util qu, char handle, int argc, char *argv, struct nlmsghdr n)
	38	{
	39	struct tc_police tp;
	40	struct tcmsg *t = NLMSG_DATA(n);
	41	struct rtattr *tail;
	42	__u32 fh = 0xFFFF8000;
	43	__u32 order = 0;
	44
	45	memset(&tp, 0, sizeof(tp));
	46
	47	if (handle) {
	48	if (get_u32(&t->tcm_handle, handle, 0)) {
	49	fprintf(stderr, "Illegal \"handle\"\n");
	50	return -1;
	51	}
	52	}
	53
	54	if (argc == 0)
	55	return 0;
	56
228569c3	57	tail = NLMSG_TAIL(n);
aba5acdf SH	58	addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);
	59
	60	while (argc > 0) {
	61	if (matches(*argv, "to") == 0) {
	62	__u32 id;
	63	NEXT_ARG();
	64	if (rtnl_rtrealm_a2n(&id, *argv)) {
	65	fprintf(stderr, "Illegal \"to\"\n");
	66	return -1;
	67	}
	68	addattr_l(n, 4096, TCA_ROUTE4_TO, &id, 4);
	69	fh &= ~0x80FF;
	70	fh \|= id&0xFF;
	71	} else if (matches(*argv, "from") == 0) {
	72	__u32 id;
	73	NEXT_ARG();
	74	if (rtnl_rtrealm_a2n(&id, *argv)) {
	75	fprintf(stderr, "Illegal \"from\"\n");
	76	return -1;
	77	}
	78	addattr_l(n, 4096, TCA_ROUTE4_FROM, &id, 4);
	79	fh &= 0xFFFF;
	80	fh \|= id<<16;
	81	} else if (matches(*argv, "fromif") == 0) {
aba5acdf SH	82	__u32 id;
aba5acdf SH	83	NEXT_ARG();
c1027a75	84	ll_init_map(&rth);
aba5acdf SH	85	if ((id=ll_name_to_index(*argv)) <= 0) {
	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) {
	94	unsigned handle;
	95	NEXT_ARG();
	96	if (get_tc_classid(&handle, *argv)) {
	97	fprintf(stderr, "Illegal \"classid\"\n");
	98	return -1;
	99	}
	100	addattr_l(n, 4096, TCA_ROUTE4_CLASSID, &handle, 4);
	101	} else if (matches(*argv, "police") == 0) {
	102	NEXT_ARG();
	103	if (parse_police(&argc, &argv, TCA_ROUTE4_POLICE, n)) {
	104	fprintf(stderr, "Illegal \"police\"\n");
	105	return -1;
	106	}
	107	continue;
287bf3a9 JHS	108	} else if (matches(*argv, "action") == 0) {
	109	NEXT_ARG();
	110	if (parse_action(&argc, &argv, TCA_ROUTE4_ACT, n)) {
	111	fprintf(stderr, "Illegal \"action\"\n");
	112	return -1;
	113	}
	114	continue;
aba5acdf SH	115	} else if (matches(*argv, "order") == 0) {
	116	NEXT_ARG();
	117	if (get_u32(&order, *argv, 0)) {
	118	fprintf(stderr, "Illegal \"order\"\n");
	119	return -1;
	120	}
	121	} else if (strcmp(*argv, "help") == 0) {
	122	explain();
	123	return -1;
	124	} else {
	125	fprintf(stderr, "What is \"%s\"?\n", *argv);
	126	explain();
	127	return -1;
	128	}
	129	argc--; argv++;
	130	}
228569c3	131	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
aba5acdf SH	132	if (order) {
	133	fh &= ~0x7F00;
	134	fh \|= (order<<8)&0x7F00;
	135	}
	136	if (!t->tcm_handle)
	137	t->tcm_handle = fh;
	138	return 0;
	139	}
	140
	141	static int route_print_opt(struct filter_util qu, FILE f, struct rtattr *opt, __u32 handle)
	142	{
	143	struct rtattr *tb[TCA_ROUTE4_MAX+1];
	144	SPRINT_BUF(b1);
	145
	146	if (opt == NULL)
	147	return 0;
	148
3b3ecd31	149	parse_rtattr_nested(tb, TCA_ROUTE4_MAX, opt);
aba5acdf SH	150
	151	if (handle)
	152	fprintf(f, "fh 0x%08x ", handle);
	153	if (handle&0x7F00)
	154	fprintf(f, "order %d ", (handle>>8)&0x7F);
	155
	156	if (tb[TCA_ROUTE4_CLASSID]) {
	157	SPRINT_BUF(b1);
ff24746c	158	fprintf(f, "flowid %s ", sprint_tc_classid(rta_getattr_u32(tb[TCA_ROUTE4_CLASSID]), b1));
aba5acdf SH	159	}
aba5acdf SH	160	if (tb[TCA_ROUTE4_TO])
ff24746c	161	fprintf(f, "to %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_TO]), b1, sizeof(b1)));
aba5acdf	162	if (tb[TCA_ROUTE4_FROM])
ff24746c	163	fprintf(f, "from %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_FROM]), b1, sizeof(b1)));
aba5acdf SH	164	if (tb[TCA_ROUTE4_IIF])
	165	fprintf(f, "fromif %s", ll_index_to_name((int)RTA_DATA(tb[TCA_ROUTE4_IIF])));
	166	if (tb[TCA_ROUTE4_POLICE])
	167	tc_print_police(f, tb[TCA_ROUTE4_POLICE]);
287bf3a9 JHS	168	if (tb[TCA_ROUTE4_ACT])
287bf3a9 JHS	169	tc_print_action(f, tb[TCA_ROUTE4_ACT]);
aba5acdf SH	170	return 0;
	171	}
	172
6b7dff17 SH	173	struct filter_util route_filter_util = {
	174	.id = "route",
	175	.parse_fopt = route_parse_opt,
	176	.print_fopt = route_print_opt,
aba5acdf	177	};