[mirror_iproute2.git] / ip / iplink_macvlan.c

/*
 * iplink_macvlan.c	macvlan/macvtap device support
 *
 *              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:     Patrick McHardy <kaber@trash.net>
 *		Arnd Bergmann <arnd@arndb.de>
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <linux/if_link.h>
#include <linux/if_ether.h>

#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"

#define pfx_err(lu, ...) {               \
	fprintf(stderr, "%s: ", lu->id); \
	fprintf(stderr, __VA_ARGS__);    \
	fprintf(stderr, "\n");           \
}

static void print_explain(struct link_util *lu, FILE *f)
{
	fprintf(f,
		"Usage: ... %s mode MODE [flag MODE_FLAG] MODE_OPTS\n"
		"\n"
		"MODE: private | vepa | bridge | passthru | source\n"
		"MODE_FLAG: null | nopromisc\n"
		"MODE_OPTS: for mode \"source\":\n"
		"\tmacaddr { { add | del } <macaddr> | set [ <macaddr> [ <macaddr>  ... ] ] | flush }\n",
		lu->id
	);
}

static void explain(struct link_util *lu)
{
	print_explain(lu, stderr);
}


static int mode_arg(const char *arg)
{
	fprintf(stderr,
		"Error: argument of \"mode\" must be \"private\", \"vepa\", \"bridge\", \"passthru\" or \"source\", not \"%s\"\n",
		arg);
	return -1;
}

static int flag_arg(const char *arg)
{
	fprintf(stderr,
		"Error: argument of \"flag\" must be \"nopromisc\" or \"null\", not \"%s\"\n",
		arg);
	return -1;
}

static int macvlan_parse_opt(struct link_util *lu, int argc, char **argv,
			  struct nlmsghdr *n)
{
	__u32 mode = 0;
	__u16 flags = 0;
	__u32 mac_mode = 0;
	int has_flags = 0;
	char mac[ETH_ALEN];
	struct rtattr *nmac;

	while (argc > 0) {
		if (matches(*argv, "mode") == 0) {
			NEXT_ARG();

			if (strcmp(*argv, "private") == 0)
				mode = MACVLAN_MODE_PRIVATE;
			else if (strcmp(*argv, "vepa") == 0)
				mode = MACVLAN_MODE_VEPA;
			else if (strcmp(*argv, "bridge") == 0)
				mode = MACVLAN_MODE_BRIDGE;
			else if (strcmp(*argv, "passthru") == 0)
				mode = MACVLAN_MODE_PASSTHRU;
			else if (strcmp(*argv, "source") == 0)
				mode = MACVLAN_MODE_SOURCE;
			else
				return mode_arg(*argv);
		} else if (matches(*argv, "flag") == 0) {
			NEXT_ARG();

			if (strcmp(*argv, "nopromisc") == 0)
				flags |= MACVLAN_FLAG_NOPROMISC;
			else if (strcmp(*argv, "null") == 0)
				flags |= 0;
			else
				return flag_arg(*argv);

			has_flags = 1;

		} else if (matches(*argv, "macaddr") == 0) {
			NEXT_ARG();

			if (strcmp(*argv, "add") == 0) {
				mac_mode = MACVLAN_MACADDR_ADD;
			} else if (strcmp(*argv, "del") == 0) {
				mac_mode = MACVLAN_MACADDR_DEL;
			} else if (strcmp(*argv, "set") == 0) {
				mac_mode = MACVLAN_MACADDR_SET;
			} else if (strcmp(*argv, "flush") == 0) {
				mac_mode = MACVLAN_MACADDR_FLUSH;
			} else {
				explain(lu);
				return -1;
			}

			addattr32(n, 1024, IFLA_MACVLAN_MACADDR_MODE, mac_mode);

			if (mac_mode == MACVLAN_MACADDR_ADD ||
			    mac_mode == MACVLAN_MACADDR_DEL) {
				NEXT_ARG();

				if (ll_addr_a2n(mac, sizeof(mac),
						*argv) != ETH_ALEN)
					return -1;

				addattr_l(n, 1024, IFLA_MACVLAN_MACADDR, &mac,
					  ETH_ALEN);
			}

			if (mac_mode == MACVLAN_MACADDR_SET) {
				nmac = addattr_nest(n, 1024,
						    IFLA_MACVLAN_MACADDR_DATA);
				while (NEXT_ARG_OK()) {
					NEXT_ARG_FWD();

					if (ll_addr_a2n(mac, sizeof(mac),
							*argv) != ETH_ALEN) {
						PREV_ARG();
						break;
					}

					addattr_l(n, 1024, IFLA_MACVLAN_MACADDR,
						  &mac, ETH_ALEN);
				}
				addattr_nest_end(n, nmac);
			}
		} else if (matches(*argv, "nopromisc") == 0) {
			flags |= MACVLAN_FLAG_NOPROMISC;
			has_flags = 1;
		} else if (matches(*argv, "help") == 0) {
			explain(lu);
			return -1;
		} else {
			pfx_err(lu, "unknown option \"%s\"?", *argv);
			explain(lu);
			return -1;
		}
		argc--, argv++;
	}

	if (mode)
		addattr32(n, 1024, IFLA_MACVLAN_MODE, mode);

	if (has_flags) {
		if (flags & MACVLAN_FLAG_NOPROMISC &&
		    mode != MACVLAN_MODE_PASSTHRU) {
			pfx_err(lu, "nopromisc flag only valid in passthru mode");
			explain(lu);
			return -1;
		}
		addattr16(n, 1024, IFLA_MACVLAN_FLAGS, flags);
	}
	return 0;
}

static void macvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
	__u32 mode;
	__u16 flags;
	__u32 count;
	unsigned char *addr;
	int len;
	struct rtattr *rta;

	if (!tb)
		return;

	if (!tb[IFLA_MACVLAN_MODE] ||
	    RTA_PAYLOAD(tb[IFLA_MACVLAN_MODE]) < sizeof(__u32))
		return;

	mode = rta_getattr_u32(tb[IFLA_MACVLAN_MODE]);
	print_string(PRINT_ANY,
		     "mode",
		     "mode %s ",
		     mode == MACVLAN_MODE_PRIVATE ? "private"
		     : mode == MACVLAN_MODE_VEPA    ? "vepa"
		     : mode == MACVLAN_MODE_BRIDGE  ? "bridge"
		     : mode == MACVLAN_MODE_PASSTHRU  ? "passthru"
		     : mode == MACVLAN_MODE_SOURCE  ? "source"
		     :				 "unknown");

	if (!tb[IFLA_MACVLAN_FLAGS] ||
	    RTA_PAYLOAD(tb[IFLA_MACVLAN_FLAGS]) < sizeof(__u16))
		flags = 0;
	else
		flags = rta_getattr_u16(tb[IFLA_MACVLAN_FLAGS]);

	if (flags & MACVLAN_FLAG_NOPROMISC)
		print_bool(PRINT_ANY, "nopromisc", "nopromisc ", true);

	/* in source mode, there are more options to print */

	if (mode != MACVLAN_MODE_SOURCE)
		return;

	if (!tb[IFLA_MACVLAN_MACADDR_COUNT] ||
	    RTA_PAYLOAD(tb[IFLA_MACVLAN_MACADDR_COUNT]) < sizeof(__u32))
		return;

	count = rta_getattr_u32(tb[IFLA_MACVLAN_MACADDR_COUNT]);
	print_int(PRINT_ANY, "macaddr_count", "remotes (%d) ", count);

	if (!tb[IFLA_MACVLAN_MACADDR_DATA])
		return;

	rta = RTA_DATA(tb[IFLA_MACVLAN_MACADDR_DATA]);
	len = RTA_PAYLOAD(tb[IFLA_MACVLAN_MACADDR_DATA]);

	open_json_array(PRINT_JSON, "macaddr_data");
	for (; RTA_OK(rta, len); rta = RTA_NEXT(rta, len)) {
		if (rta->rta_type != IFLA_MACVLAN_MACADDR ||
		    RTA_PAYLOAD(rta) < 6)
			continue;
		addr = RTA_DATA(rta);
		if (is_json_context()) {
			SPRINT_BUF(b1);

			snprintf(b1, sizeof(b1),
				 "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", addr[0],
				 addr[1], addr[2], addr[3], addr[4], addr[5]);
			print_string(PRINT_JSON, NULL, NULL, b1);
		} else {
			fprintf(f, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x ", addr[0],
				addr[1], addr[2], addr[3], addr[4], addr[5]);
		}
	}
	close_json_array(PRINT_JSON, NULL);
}

static void macvlan_print_help(struct link_util *lu, int argc, char **argv,
			       FILE *f)
{
	print_explain(lu, f);
}

struct link_util macvlan_link_util = {
	.id		= "macvlan",
	.maxattr	= IFLA_MACVLAN_MAX,
	.parse_opt	= macvlan_parse_opt,
	.print_opt	= macvlan_print_opt,
	.print_help	= macvlan_print_help,
};

struct link_util macvtap_link_util = {
	.id		= "macvtap",
	.maxattr	= IFLA_MACVLAN_MAX,
	.parse_opt	= macvlan_parse_opt,
	.print_opt	= macvlan_print_opt,
	.print_help	= macvlan_print_help,
};
Commit	Line	Data
d63a9b2b	1	/*
541f1b3e	2	* iplink_macvlan.c macvlan/macvtap device support
d63a9b2b AB	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: Patrick McHardy <kaber@trash.net>
	10	* Arnd Bergmann <arnd@arndb.de>
	11	*/
	12
	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <string.h>
	16	#include <sys/socket.h>
	17	#include <linux/if_link.h>
aa1b44ca	18	#include <linux/if_ether.h>
d63a9b2b AB	19
	20	#include "rt_names.h"
	21	#include "utils.h"
	22	#include "ip_common.h"
	23
541f1b3e PS	24	#define pfx_err(lu, ...) { \
	25	fprintf(stderr, "%s: ", lu->id); \
	26	fprintf(stderr, __VA_ARGS__); \
	27	fprintf(stderr, "\n"); \
	28	}
	29
	30	static void print_explain(struct link_util lu, FILE f)
d63a9b2b	31	{
561e650e	32	fprintf(f,
aa1b44ca	33	"Usage: ... %s mode MODE [flag MODE_FLAG] MODE_OPTS\n"
e336868e	34	"\n"
aa1b44ca	35	"MODE: private \| vepa \| bridge \| passthru \| source\n"
	36	"MODE_FLAG: null \| nopromisc\n"
	37	"MODE_OPTS: for mode \"source\":\n"
	38	"\tmacaddr { { add \| del } <macaddr> \| set [ <macaddr> [ <macaddr> ... ] ] \| flush }\n",
541f1b3e	39	lu->id
d63a9b2b AB	40	);
	41	}
	42
541f1b3e	43	static void explain(struct link_util *lu)
561e650e	44	{
541f1b3e	45	print_explain(lu, stderr);
561e650e	46	}
561e650e	47
f33b7276	48
f3f339e9	49	static int mode_arg(const char *arg)
f33b7276	50	{
7409334b	51	fprintf(stderr,
aa1b44ca	52	"Error: argument of \"mode\" must be \"private\", \"vepa\", \"bridge\", \"passthru\" or \"source\", not \"%s\"\n",
	53	arg);
	54	return -1;
	55	}
	56
	57	static int flag_arg(const char *arg)
	58	{
	59	fprintf(stderr,
	60	"Error: argument of \"flag\" must be \"nopromisc\" or \"null\", not \"%s\"\n",
56f5daac SH	61	arg);
56f5daac SH	62	return -1;
d63a9b2b AB	63	}
	64
	65	static int macvlan_parse_opt(struct link_util lu, int argc, char *argv,
	66	struct nlmsghdr *n)
	67	{
3cf8ba59 PS	68	__u32 mode = 0;
3cf8ba59 PS	69	__u16 flags = 0;
aa1b44ca	70	__u32 mac_mode = 0;
	71	int has_flags = 0;
	72	char mac[ETH_ALEN];
	73	struct rtattr *nmac;
3cf8ba59	74
d63a9b2b AB	75	while (argc > 0) {
d63a9b2b AB	76	if (matches(*argv, "mode") == 0) {
d63a9b2b AB	77	NEXT_ARG();
	78
	79	if (strcmp(*argv, "private") == 0)
	80	mode = MACVLAN_MODE_PRIVATE;
	81	else if (strcmp(*argv, "vepa") == 0)
	82	mode = MACVLAN_MODE_VEPA;
	83	else if (strcmp(*argv, "bridge") == 0)
	84	mode = MACVLAN_MODE_BRIDGE;
f0612d56 SS	85	else if (strcmp(*argv, "passthru") == 0)
f0612d56 SS	86	mode = MACVLAN_MODE_PASSTHRU;
aa1b44ca	87	else if (strcmp(*argv, "source") == 0)
aa1b44ca	88	mode = MACVLAN_MODE_SOURCE;
d63a9b2b	89	else
541f1b3e	90	return mode_arg(*argv);
aa1b44ca	91	} else if (matches(*argv, "flag") == 0) {
	92	NEXT_ARG();
	93
	94	if (strcmp(*argv, "nopromisc") == 0)
	95	flags \|= MACVLAN_FLAG_NOPROMISC;
	96	else if (strcmp(*argv, "null") == 0)
	97	flags \|= 0;
	98	else
	99	return flag_arg(*argv);
	100
	101	has_flags = 1;
	102
	103	} else if (matches(*argv, "macaddr") == 0) {
	104	NEXT_ARG();
	105
	106	if (strcmp(*argv, "add") == 0) {
	107	mac_mode = MACVLAN_MACADDR_ADD;
	108	} else if (strcmp(*argv, "del") == 0) {
	109	mac_mode = MACVLAN_MACADDR_DEL;
	110	} else if (strcmp(*argv, "set") == 0) {
	111	mac_mode = MACVLAN_MACADDR_SET;
	112	} else if (strcmp(*argv, "flush") == 0) {
	113	mac_mode = MACVLAN_MACADDR_FLUSH;
	114	} else {
	115	explain(lu);
	116	return -1;
	117	}
	118
	119	addattr32(n, 1024, IFLA_MACVLAN_MACADDR_MODE, mac_mode);
	120
	121	if (mac_mode == MACVLAN_MACADDR_ADD \|\|
	122	mac_mode == MACVLAN_MACADDR_DEL) {
	123	NEXT_ARG();
	124
	125	if (ll_addr_a2n(mac, sizeof(mac),
	126	*argv) != ETH_ALEN)
	127	return -1;
	128
	129	addattr_l(n, 1024, IFLA_MACVLAN_MACADDR, &mac,
	130	ETH_ALEN);
	131	}
	132
	133	if (mac_mode == MACVLAN_MACADDR_SET) {
	134	nmac = addattr_nest(n, 1024,
	135	IFLA_MACVLAN_MACADDR_DATA);
	136	while (NEXT_ARG_OK()) {
	137	NEXT_ARG_FWD();
	138
	139	if (ll_addr_a2n(mac, sizeof(mac),
	140	*argv) != ETH_ALEN) {
	141	PREV_ARG();
	142	break;
	143	}
	144
	145	addattr_l(n, 1024, IFLA_MACVLAN_MACADDR,
	146	&mac, ETH_ALEN);
	147	}
	148	addattr_nest_end(n, nmac);
	149	}
3cf8ba59 PS	150	} else if (matches(*argv, "nopromisc") == 0) {
3cf8ba59 PS	151	flags \|= MACVLAN_FLAG_NOPROMISC;
aa1b44ca	152	has_flags = 1;
d63a9b2b	153	} else if (matches(*argv, "help") == 0) {
541f1b3e	154	explain(lu);
d63a9b2b AB	155	return -1;
d63a9b2b AB	156	} else {
541f1b3e PS	157	pfx_err(lu, "unknown option \"%s\"?", *argv);
541f1b3e PS	158	explain(lu);
d63a9b2b AB	159	return -1;
	160	}
	161	argc--, argv++;
	162	}
	163
3cf8ba59 PS	164	if (mode)
	165	addattr32(n, 1024, IFLA_MACVLAN_MODE, mode);
	166
aa1b44ca	167	if (has_flags) {
3cf8ba59 PS	168	if (flags & MACVLAN_FLAG_NOPROMISC &&
	169	mode != MACVLAN_MODE_PASSTHRU) {
	170	pfx_err(lu, "nopromisc flag only valid in passthru mode");
	171	explain(lu);
	172	return -1;
	173	}
	174	addattr16(n, 1024, IFLA_MACVLAN_FLAGS, flags);
	175	}
d63a9b2b AB	176	return 0;
	177	}
	178
	179	static void macvlan_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	180	{
	181	__u32 mode;
3cf8ba59	182	__u16 flags;
aa1b44ca	183	__u32 count;
	184	unsigned char *addr;
	185	int len;
	186	struct rtattr *rta;
d63a9b2b AB	187
	188	if (!tb)
	189	return;
	190
	191	if (!tb[IFLA_MACVLAN_MODE] \|\|
	192	RTA_PAYLOAD(tb[IFLA_MACVLAN_MODE]) < sizeof(__u32))
	193	return;
	194
7dc0481a	195	mode = rta_getattr_u32(tb[IFLA_MACVLAN_MODE]);
92b7454c JF	196	print_string(PRINT_ANY,
	197	"mode",
	198	"mode %s ",
	199	mode == MACVLAN_MODE_PRIVATE ? "private"
	200	: mode == MACVLAN_MODE_VEPA ? "vepa"
	201	: mode == MACVLAN_MODE_BRIDGE ? "bridge"
	202	: mode == MACVLAN_MODE_PASSTHRU ? "passthru"
	203	: mode == MACVLAN_MODE_SOURCE ? "source"
	204	: "unknown");
3cf8ba59 PS	205
	206	if (!tb[IFLA_MACVLAN_FLAGS] \|\|
	207	RTA_PAYLOAD(tb[IFLA_MACVLAN_FLAGS]) < sizeof(__u16))
aa1b44ca	208	flags = 0;
	209	else
	210	flags = rta_getattr_u16(tb[IFLA_MACVLAN_FLAGS]);
3cf8ba59	211
3cf8ba59	212	if (flags & MACVLAN_FLAG_NOPROMISC)
92b7454c	213	print_bool(PRINT_ANY, "nopromisc", "nopromisc ", true);
aa1b44ca	214
	215	/* in source mode, there are more options to print */
	216
	217	if (mode != MACVLAN_MODE_SOURCE)
	218	return;
	219
	220	if (!tb[IFLA_MACVLAN_MACADDR_COUNT] \|\|
	221	RTA_PAYLOAD(tb[IFLA_MACVLAN_MACADDR_COUNT]) < sizeof(__u32))
	222	return;
	223
	224	count = rta_getattr_u32(tb[IFLA_MACVLAN_MACADDR_COUNT]);
92b7454c	225	print_int(PRINT_ANY, "macaddr_count", "remotes (%d) ", count);
aa1b44ca	226
	227	if (!tb[IFLA_MACVLAN_MACADDR_DATA])
	228	return;
	229
	230	rta = RTA_DATA(tb[IFLA_MACVLAN_MACADDR_DATA]);
	231	len = RTA_PAYLOAD(tb[IFLA_MACVLAN_MACADDR_DATA]);
	232
92b7454c	233	open_json_array(PRINT_JSON, "macaddr_data");
aa1b44ca	234	for (; RTA_OK(rta, len); rta = RTA_NEXT(rta, len)) {
	235	if (rta->rta_type != IFLA_MACVLAN_MACADDR \|\|
	236	RTA_PAYLOAD(rta) < 6)
	237	continue;
	238	addr = RTA_DATA(rta);
92b7454c JF	239	if (is_json_context()) {
	240	SPRINT_BUF(b1);
	241
	242	snprintf(b1, sizeof(b1),
	243	"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", addr[0],
	244	addr[1], addr[2], addr[3], addr[4], addr[5]);
	245	print_string(PRINT_JSON, NULL, NULL, b1);
	246	} else {
	247	fprintf(f, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x ", addr[0],
	248	addr[1], addr[2], addr[3], addr[4], addr[5]);
	249	}
aa1b44ca	250	}
92b7454c	251	close_json_array(PRINT_JSON, NULL);
d63a9b2b AB	252	}
d63a9b2b AB	253
561e650e	254	static void macvlan_print_help(struct link_util lu, int argc, char *argv,
92b7454c	255	FILE *f)
561e650e	256	{
541f1b3e	257	print_explain(lu, f);
561e650e	258	}
561e650e	259
d63a9b2b AB	260	struct link_util macvlan_link_util = {
	261	.id = "macvlan",
	262	.maxattr = IFLA_MACVLAN_MAX,
	263	.parse_opt = macvlan_parse_opt,
	264	.print_opt = macvlan_print_opt,
561e650e	265	.print_help = macvlan_print_help,
d63a9b2b	266	};
541f1b3e PS	267
	268	struct link_util macvtap_link_util = {
	269	.id = "macvtap",
	270	.maxattr = IFLA_MACVLAN_MAX,
	271	.parse_opt = macvlan_parse_opt,
	272	.print_opt = macvlan_print_opt,
	273	.print_help = macvlan_print_help,
	274	};