[mirror_iproute2.git] / tc / m_skbedit.c

/*
 * m_skbedit.c		SKB Editing module
 *
 * Copyright (c) 2008, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses>.
 *
 * Authors:	Alexander Duyck <alexander.h.duyck@intel.com>
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "utils.h"
#include "tc_util.h"
#include <linux/tc_act/tc_skbedit.h>
#include <linux/if_packet.h>

static void explain(void)
{
	fprintf(stderr, "Usage: ... skbedit <[QM] [PM] [MM] [PT] [IF]>\n"
		"QM = queue_mapping QUEUE_MAPPING\n"
		"PM = priority PRIORITY\n"
		"MM = mark MARK\n"
		"PT = ptype PACKETYPE\n"
		"IF = inheritdsfield\n"
		"PACKETYPE = is one of:\n"
		"  host, otherhost, broadcast, multicast\n"
		"QUEUE_MAPPING = device transmit queue to use\n"
		"PRIORITY = classID to assign to priority field\n"
		"MARK = firewall mark to set\n"
		"note: inheritdsfield maps DS field to skb->priority\n");
}

static void
usage(void)
{
	explain();
	exit(-1);
}

static int
parse_skbedit(struct action_util *a, int *argc_p, char ***argv_p, int tca_id,
	      struct nlmsghdr *n)
{
	int argc = *argc_p;
	char **argv = *argv_p;
	int ok = 0;
	struct rtattr *tail;
	unsigned int tmp;
	__u16 queue_mapping, ptype;
	__u32 flags = 0, priority, mark;
	__u64 pure_flags = 0;
	struct tc_skbedit sel = { 0 };

	if (matches(*argv, "skbedit") != 0)
		return -1;

	NEXT_ARG();

	while (argc > 0) {
		if (matches(*argv, "queue_mapping") == 0) {
			flags |= SKBEDIT_F_QUEUE_MAPPING;
			NEXT_ARG();
			if (get_unsigned(&tmp, *argv, 10) || tmp > 65535) {
				fprintf(stderr, "Illegal queue_mapping\n");
				return -1;
			}
			queue_mapping = tmp;
			ok++;
		} else if (matches(*argv, "priority") == 0) {
			flags |= SKBEDIT_F_PRIORITY;
			NEXT_ARG();
			if (get_tc_classid(&priority, *argv)) {
				fprintf(stderr, "Illegal priority\n");
				return -1;
			}
			ok++;
		} else if (matches(*argv, "mark") == 0) {
			flags |= SKBEDIT_F_MARK;
			NEXT_ARG();
			if (get_u32(&mark, *argv, 0)) {
				fprintf(stderr, "Illegal mark\n");
				return -1;
			}
			ok++;
		} else if (matches(*argv, "ptype") == 0) {

			NEXT_ARG();
			if (matches(*argv, "host") == 0) {
				ptype = PACKET_HOST;
			} else if (matches(*argv, "broadcast") == 0) {
				ptype = PACKET_BROADCAST;
			} else if (matches(*argv, "multicast") == 0) {
				ptype = PACKET_MULTICAST;
			} else if (matches(*argv, "otherhost") == 0) {
				ptype = PACKET_OTHERHOST;
			} else {
				fprintf(stderr, "Illegal ptype (%s)\n",
					*argv);
				return -1;
			}
			flags |= SKBEDIT_F_PTYPE;
			ok++;
		} else if (matches(*argv, "inheritdsfield") == 0) {
			pure_flags |= SKBEDIT_F_INHERITDSFIELD;
			ok++;
		} else if (matches(*argv, "help") == 0) {
			usage();
		} else {
			break;
		}
		argc--;
		argv++;
	}

	parse_action_control_dflt(&argc, &argv, &sel.action,
				  false, TC_ACT_PIPE);

	if (argc) {
		if (matches(*argv, "index") == 0) {
			NEXT_ARG();
			if (get_u32(&sel.index, *argv, 10)) {
				fprintf(stderr, "Pedit: Illegal \"index\"\n");
				return -1;
			}
			argc--;
			argv++;
			ok++;
		}
	}

	if (!ok) {
		explain();
		return -1;
	}


	tail = addattr_nest(n, MAX_MSG, tca_id);
	addattr_l(n, MAX_MSG, TCA_SKBEDIT_PARMS, &sel, sizeof(sel));
	if (flags & SKBEDIT_F_QUEUE_MAPPING)
		addattr_l(n, MAX_MSG, TCA_SKBEDIT_QUEUE_MAPPING,
			  &queue_mapping, sizeof(queue_mapping));
	if (flags & SKBEDIT_F_PRIORITY)
		addattr_l(n, MAX_MSG, TCA_SKBEDIT_PRIORITY,
			  &priority, sizeof(priority));
	if (flags & SKBEDIT_F_MARK)
		addattr_l(n, MAX_MSG, TCA_SKBEDIT_MARK,
			  &mark, sizeof(mark));
	if (flags & SKBEDIT_F_PTYPE)
		addattr_l(n, MAX_MSG, TCA_SKBEDIT_PTYPE,
			  &ptype, sizeof(ptype));
	if (pure_flags != 0)
		addattr64(n, MAX_MSG, TCA_SKBEDIT_FLAGS, pure_flags);
	addattr_nest_end(n, tail);

	*argc_p = argc;
	*argv_p = argv;
	return 0;
}

static int print_skbedit(struct action_util *au, FILE *f, struct rtattr *arg)
{
	struct rtattr *tb[TCA_SKBEDIT_MAX + 1];

	SPRINT_BUF(b1);
	__u32 priority;
	__u16 ptype;
	struct tc_skbedit *p = NULL;

	if (arg == NULL)
		return -1;

	parse_rtattr_nested(tb, TCA_SKBEDIT_MAX, arg);

	if (tb[TCA_SKBEDIT_PARMS] == NULL) {
		print_string(PRINT_FP, NULL, "%s", "[NULL skbedit parameters]");
		return -1;
	}
	p = RTA_DATA(tb[TCA_SKBEDIT_PARMS]);

	print_string(PRINT_ANY, "kind", "%s ", "skbedit");

	if (tb[TCA_SKBEDIT_QUEUE_MAPPING] != NULL) {
		print_uint(PRINT_ANY, "queue_mapping", "queue_mapping %u",
			   rta_getattr_u16(tb[TCA_SKBEDIT_QUEUE_MAPPING]));
	}
	if (tb[TCA_SKBEDIT_PRIORITY] != NULL) {
		priority = rta_getattr_u32(tb[TCA_SKBEDIT_PRIORITY]);
		print_string(PRINT_ANY, "priority", " priority %s",
			     sprint_tc_classid(priority, b1));
	}
	if (tb[TCA_SKBEDIT_MARK] != NULL) {
		print_uint(PRINT_ANY, "mark", " mark %u",
			   rta_getattr_u32(tb[TCA_SKBEDIT_MARK]));
	}
	if (tb[TCA_SKBEDIT_PTYPE] != NULL) {
		ptype = rta_getattr_u16(tb[TCA_SKBEDIT_PTYPE]);
		if (ptype == PACKET_HOST)
			print_string(PRINT_ANY, "ptype", " ptype %s", "host");
		else if (ptype == PACKET_BROADCAST)
			print_string(PRINT_ANY, "ptype", " ptype %s",
				     "broadcast");
		else if (ptype == PACKET_MULTICAST)
			print_string(PRINT_ANY, "ptype", " ptype %s",
				     "multicast");
		else if (ptype == PACKET_OTHERHOST)
			print_string(PRINT_ANY, "ptype", " ptype %s",
				     "otherhost");
		else
			print_uint(PRINT_ANY, "ptype", " ptype %u", ptype);
	}
	if (tb[TCA_SKBEDIT_FLAGS] != NULL) {
		__u64 flags = rta_getattr_u64(tb[TCA_SKBEDIT_FLAGS]);

		if (flags & SKBEDIT_F_INHERITDSFIELD)
			print_null(PRINT_ANY, "inheritdsfield", " %s",
				     "inheritdsfield");
	}

	print_action_control(f, " ", p->action, "");

	print_string(PRINT_FP, NULL, "%s", _SL_);
	print_uint(PRINT_ANY, "index", "\t index %u", p->index);
	print_int(PRINT_ANY, "ref", " ref %d", p->refcnt);
	print_int(PRINT_ANY, "bind", " bind %d", p->bindcnt);

	if (show_stats) {
		if (tb[TCA_SKBEDIT_TM]) {
			struct tcf_t *tm = RTA_DATA(tb[TCA_SKBEDIT_TM]);

			print_tm(f, tm);
		}
	}

	print_string(PRINT_FP, NULL, "%s", _SL_);

	return 0;
}

struct action_util skbedit_action_util = {
	.id = "skbedit",
	.parse_aopt = parse_skbedit,
	.print_aopt = print_skbedit,
};
Commit	Line	Data
f72a7aab AD	1	/*
	2	* m_skbedit.c SKB Editing module
	3	*
	4	* Copyright (c) 2008, Intel Corporation.
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms and conditions of the GNU General Public License,
	8	* version 2, as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14	*
4d98ab00 SH	15	* You should have received a copy of the GNU General Public License
4d98ab00 SH	16	* along with this program; if not, see <http://www.gnu.org/licenses>.
f72a7aab AD	17	*
	18	* Authors: Alexander Duyck <alexander.h.duyck@intel.com>
	19	*
	20	*/
	21
	22	#include <stdio.h>
	23	#include <stdlib.h>
	24	#include <unistd.h>
	25	#include <string.h>
	26	#include "utils.h"
	27	#include "tc_util.h"
	28	#include <linux/tc_act/tc_skbedit.h>
1d1e0fd2	29	#include <linux/if_packet.h>
f72a7aab	30
1d1e0fd2	31	static void explain(void)
f72a7aab	32	{
697dce7b	33	fprintf(stderr, "Usage: ... skbedit <[QM] [PM] [MM] [PT] [IF]>\n"
e04dd30a	34	"QM = queue_mapping QUEUE_MAPPING\n"
32a121cb SH	35	"PM = priority PRIORITY\n"
32a121cb SH	36	"MM = mark MARK\n"
1d1e0fd2	37	"PT = ptype PACKETYPE\n"
697dce7b	38	"IF = inheritdsfield\n"
1d1e0fd2 JHS	39	"PACKETYPE = is one of:\n"
1d1e0fd2 JHS	40	" host, otherhost, broadcast, multicast\n"
e04dd30a JHS	41	"QUEUE_MAPPING = device transmit queue to use\n"
e04dd30a JHS	42	"PRIORITY = classID to assign to priority field\n"
697dce7b QF	43	"MARK = firewall mark to set\n"
697dce7b QF	44	"note: inheritdsfield maps DS field to skb->priority\n");
f72a7aab AD	45	}
	46
	47	static void
	48	usage(void)
	49	{
	50	explain();
	51	exit(-1);
	52	}
	53
	54	static int
	55	parse_skbedit(struct action_util a, int argc_p, char ***argv_p, int tca_id,
	56	struct nlmsghdr *n)
	57	{
f72a7aab AD	58	int argc = *argc_p;
	59	char *argv = argv_p;
	60	int ok = 0;
	61	struct rtattr *tail;
	62	unsigned int tmp;
1d1e0fd2	63	__u16 queue_mapping, ptype;
e04dd30a	64	__u32 flags = 0, priority, mark;
697dce7b	65	__u64 pure_flags = 0;
46a65732	66	struct tc_skbedit sel = { 0 };
f72a7aab AD	67
	68	if (matches(*argv, "skbedit") != 0)
	69	return -1;
	70
	71	NEXT_ARG();
	72
	73	while (argc > 0) {
	74	if (matches(*argv, "queue_mapping") == 0) {
	75	flags \|= SKBEDIT_F_QUEUE_MAPPING;
	76	NEXT_ARG();
	77	if (get_unsigned(&tmp, *argv, 10) \|\| tmp > 65535) {
	78	fprintf(stderr, "Illegal queue_mapping\n");
	79	return -1;
	80	}
	81	queue_mapping = tmp;
	82	ok++;
	83	} else if (matches(*argv, "priority") == 0) {
	84	flags \|= SKBEDIT_F_PRIORITY;
	85	NEXT_ARG();
	86	if (get_tc_classid(&priority, *argv)) {
	87	fprintf(stderr, "Illegal priority\n");
	88	return -1;
	89	}
	90	ok++;
e04dd30a JHS	91	} else if (matches(*argv, "mark") == 0) {
	92	flags \|= SKBEDIT_F_MARK;
	93	NEXT_ARG();
e906975a	94	if (get_u32(&mark, *argv, 0)) {
e04dd30a JHS	95	fprintf(stderr, "Illegal mark\n");
	96	return -1;
	97	}
	98	ok++;
1d1e0fd2 JHS	99	} else if (matches(*argv, "ptype") == 0) {
	100
	101	NEXT_ARG();
	102	if (matches(*argv, "host") == 0) {
	103	ptype = PACKET_HOST;
	104	} else if (matches(*argv, "broadcast") == 0) {
	105	ptype = PACKET_BROADCAST;
	106	} else if (matches(*argv, "multicast") == 0) {
	107	ptype = PACKET_MULTICAST;
	108	} else if (matches(*argv, "otherhost") == 0) {
	109	ptype = PACKET_OTHERHOST;
	110	} else {
	111	fprintf(stderr, "Illegal ptype (%s)\n",
	112	*argv);
	113	return -1;
	114	}
	115	flags \|= SKBEDIT_F_PTYPE;
	116	ok++;
697dce7b QF	117	} else if (matches(*argv, "inheritdsfield") == 0) {
	118	pure_flags \|= SKBEDIT_F_INHERITDSFIELD;
	119	ok++;
f72a7aab AD	120	} else if (matches(*argv, "help") == 0) {
	121	usage();
	122	} else {
	123	break;
	124	}
	125	argc--;
	126	argv++;
	127	}
	128
e67aba55 JP	129	parse_action_control_dflt(&argc, &argv, &sel.action,
e67aba55 JP	130	false, TC_ACT_PIPE);
f72a7aab AD	131
	132	if (argc) {
	133	if (matches(*argv, "index") == 0) {
	134	NEXT_ARG();
	135	if (get_u32(&sel.index, *argv, 10)) {
	136	fprintf(stderr, "Pedit: Illegal \"index\"\n");
	137	return -1;
	138	}
	139	argc--;
	140	argv++;
	141	ok++;
	142	}
	143	}
	144
	145	if (!ok) {
	146	explain();
	147	return -1;
	148	}
	149
	150
c14f9d92	151	tail = addattr_nest(n, MAX_MSG, tca_id);
f72a7aab AD	152	addattr_l(n, MAX_MSG, TCA_SKBEDIT_PARMS, &sel, sizeof(sel));
	153	if (flags & SKBEDIT_F_QUEUE_MAPPING)
	154	addattr_l(n, MAX_MSG, TCA_SKBEDIT_QUEUE_MAPPING,
	155	&queue_mapping, sizeof(queue_mapping));
	156	if (flags & SKBEDIT_F_PRIORITY)
	157	addattr_l(n, MAX_MSG, TCA_SKBEDIT_PRIORITY,
	158	&priority, sizeof(priority));
e04dd30a JHS	159	if (flags & SKBEDIT_F_MARK)
	160	addattr_l(n, MAX_MSG, TCA_SKBEDIT_MARK,
	161	&mark, sizeof(mark));
1d1e0fd2 JHS	162	if (flags & SKBEDIT_F_PTYPE)
	163	addattr_l(n, MAX_MSG, TCA_SKBEDIT_PTYPE,
	164	&ptype, sizeof(ptype));
697dce7b QF	165	if (pure_flags != 0)
697dce7b QF	166	addattr64(n, MAX_MSG, TCA_SKBEDIT_FLAGS, pure_flags);
c14f9d92	167	addattr_nest_end(n, tail);
f72a7aab AD	168
	169	*argc_p = argc;
	170	*argv_p = argv;
	171	return 0;
	172	}
	173
	174	static int print_skbedit(struct action_util au, FILE f, struct rtattr *arg)
	175	{
f72a7aab	176	struct rtattr *tb[TCA_SKBEDIT_MAX + 1];
32a121cb	177
f72a7aab	178	SPRINT_BUF(b1);
7b177017 RM	179	__u32 priority;
7b177017 RM	180	__u16 ptype;
02b1d345	181	struct tc_skbedit *p = NULL;
f72a7aab AD	182
	183	if (arg == NULL)
	184	return -1;
	185
	186	parse_rtattr_nested(tb, TCA_SKBEDIT_MAX, arg);
	187
	188	if (tb[TCA_SKBEDIT_PARMS] == NULL) {
7b177017	189	print_string(PRINT_FP, NULL, "%s", "[NULL skbedit parameters]");
f72a7aab AD	190	return -1;
f72a7aab AD	191	}
02b1d345	192	p = RTA_DATA(tb[TCA_SKBEDIT_PARMS]);
f72a7aab	193
7b177017	194	print_string(PRINT_ANY, "kind", "%s ", "skbedit");
f72a7aab AD	195
f72a7aab AD	196	if (tb[TCA_SKBEDIT_QUEUE_MAPPING] != NULL) {
7b177017 RM	197	print_uint(PRINT_ANY, "queue_mapping", "queue_mapping %u",
7b177017 RM	198	rta_getattr_u16(tb[TCA_SKBEDIT_QUEUE_MAPPING]));
f72a7aab AD	199	}
f72a7aab AD	200	if (tb[TCA_SKBEDIT_PRIORITY] != NULL) {
7b177017 RM	201	priority = rta_getattr_u32(tb[TCA_SKBEDIT_PRIORITY]);
	202	print_string(PRINT_ANY, "priority", " priority %s",
	203	sprint_tc_classid(priority, b1));
f72a7aab	204	}
e04dd30a	205	if (tb[TCA_SKBEDIT_MARK] != NULL) {
7b177017 RM	206	print_uint(PRINT_ANY, "mark", " mark %u",
7b177017 RM	207	rta_getattr_u32(tb[TCA_SKBEDIT_MARK]));
e04dd30a	208	}
1d1e0fd2	209	if (tb[TCA_SKBEDIT_PTYPE] != NULL) {
7b177017 RM	210	ptype = rta_getattr_u16(tb[TCA_SKBEDIT_PTYPE]);
	211	if (ptype == PACKET_HOST)
	212	print_string(PRINT_ANY, "ptype", " ptype %s", "host");
	213	else if (ptype == PACKET_BROADCAST)
	214	print_string(PRINT_ANY, "ptype", " ptype %s",
	215	"broadcast");
	216	else if (ptype == PACKET_MULTICAST)
	217	print_string(PRINT_ANY, "ptype", " ptype %s",
	218	"multicast");
	219	else if (ptype == PACKET_OTHERHOST)
	220	print_string(PRINT_ANY, "ptype", " ptype %s",
	221	"otherhost");
1d1e0fd2	222	else
7b177017	223	print_uint(PRINT_ANY, "ptype", " ptype %u", ptype);
1d1e0fd2	224	}
697dce7b QF	225	if (tb[TCA_SKBEDIT_FLAGS] != NULL) {
	226	__u64 flags = rta_getattr_u64(tb[TCA_SKBEDIT_FLAGS]);
	227
	228	if (flags & SKBEDIT_F_INHERITDSFIELD)
	229	print_null(PRINT_ANY, "inheritdsfield", " %s",
	230	"inheritdsfield");
	231	}
f72a7aab	232
e67aba55	233	print_action_control(f, " ", p->action, "");
878babff	234
7b177017 RM	235	print_string(PRINT_FP, NULL, "%s", _SL_);
	236	print_uint(PRINT_ANY, "index", "\t index %u", p->index);
	237	print_int(PRINT_ANY, "ref", " ref %d", p->refcnt);
	238	print_int(PRINT_ANY, "bind", " bind %d", p->bindcnt);
02b1d345	239
f72a7aab AD	240	if (show_stats) {
	241	if (tb[TCA_SKBEDIT_TM]) {
	242	struct tcf_t *tm = RTA_DATA(tb[TCA_SKBEDIT_TM]);
32a121cb	243
f72a7aab AD	244	print_tm(f, tm);
	245	}
	246	}
	247
7b177017	248	print_string(PRINT_FP, NULL, "%s", _SL_);
02b1d345	249
f72a7aab AD	250	return 0;
	251	}
	252
	253	struct action_util skbedit_action_util = {
	254	.id = "skbedit",
	255	.parse_aopt = parse_skbedit,
	256	.print_aopt = print_skbedit,
	257	};