[mirror_ubuntu-artful-kernel.git] / net / ieee802154 / netlink.c

/*
 * Netlink inteface for IEEE 802.15.4 stack
 *
 * Copyright 2007, 2008 Siemens AG
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Written by:
 * Sergey Lapin <slapin@ossfans.org>
 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 * Maxim Osipov <maxim.osipov@siemens.com>
 */

#include <linux/kernel.h>
#include <linux/gfp.h>
#include <net/genetlink.h>
#include <linux/nl802154.h>

#include "ieee802154.h"

static unsigned int ieee802154_seq_num;
static DEFINE_SPINLOCK(ieee802154_seq_lock);

struct genl_family nl802154_family = {
	.id		= GENL_ID_GENERATE,
	.hdrsize	= 0,
	.name		= IEEE802154_NL_NAME,
	.version	= 1,
	.maxattr	= IEEE802154_ATTR_MAX,
};

/* Requests to userspace */
struct sk_buff *ieee802154_nl_create(int flags, u8 req)
{
	void *hdr;
	struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
	unsigned long f;

	if (!msg)
		return NULL;

	spin_lock_irqsave(&ieee802154_seq_lock, f);
	hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
			&nl802154_family, flags, req);
	spin_unlock_irqrestore(&ieee802154_seq_lock, f);
	if (!hdr) {
		nlmsg_free(msg);
		return NULL;
	}

	return msg;
}

int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
{
	struct nlmsghdr *nlh = nlmsg_hdr(msg);
	void *hdr = genlmsg_data(nlmsg_data(nlh));

	if (genlmsg_end(msg, hdr) < 0)
		goto out;

	return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC);
out:
	nlmsg_free(msg);
	return -ENOBUFS;
}

struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info,
		int flags, u8 req)
{
	void *hdr;
	struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);

	if (!msg)
		return NULL;

	hdr = genlmsg_put_reply(msg, info,
			&nl802154_family, flags, req);
	if (!hdr) {
		nlmsg_free(msg);
		return NULL;
	}

	return msg;
}

int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info)
{
	struct nlmsghdr *nlh = nlmsg_hdr(msg);
	void *hdr = genlmsg_data(nlmsg_data(nlh));

	if (genlmsg_end(msg, hdr) < 0)
		goto out;

	return genlmsg_reply(msg, info);
out:
	nlmsg_free(msg);
	return -ENOBUFS;
}

static const struct genl_ops ieee8021154_ops[] = {
	/* see nl-phy.c */
	IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
			ieee802154_dump_phy),
	IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface),
	IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface),
	/* see nl-mac.c */
	IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
	IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
	IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
	IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
	IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
	IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
			ieee802154_dump_iface),
};

static const struct genl_multicast_group ieee802154_mcgrps[] = {
	[IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, },
	[IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, },
};


int __init ieee802154_nl_init(void)
{
	return genl_register_family_with_ops_groups(&nl802154_family,
						    ieee8021154_ops,
						    ieee802154_mcgrps);
}

void __exit ieee802154_nl_exit(void)
{
	genl_unregister_family(&nl802154_family);
}
Commit	Line	Data
2c21d115 SL	1	/*
	2	* Netlink inteface for IEEE 802.15.4 stack
	3	*
	4	* Copyright 2007, 2008 Siemens AG
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; if not, write to the Free Software Foundation, Inc.,
	17	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	18	*
	19	* Written by:
	20	* Sergey Lapin <slapin@ossfans.org>
	21	* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
8e753dd0	22	* Maxim Osipov <maxim.osipov@siemens.com>
2c21d115 SL	23	*/
	24
	25	#include <linux/kernel.h>
5a0e3ad6	26	#include <linux/gfp.h>
2c21d115 SL	27	#include <net/genetlink.h>
2c21d115 SL	28	#include <linux/nl802154.h>
78fe738d DES	29
78fe738d DES	30	#include "ieee802154.h"
2c21d115 SL	31
2c21d115 SL	32	static unsigned int ieee802154_seq_num;
c4835d81	33	static DEFINE_SPINLOCK(ieee802154_seq_lock);
2c21d115	34
78fe738d	35	struct genl_family nl802154_family = {
2c21d115 SL	36	.id = GENL_ID_GENERATE,
	37	.hdrsize = 0,
	38	.name = IEEE802154_NL_NAME,
	39	.version = 1,
	40	.maxattr = IEEE802154_ATTR_MAX,
	41	};
	42
2c21d115	43	/* Requests to userspace */
78fe738d	44	struct sk_buff *ieee802154_nl_create(int flags, u8 req)
2c21d115 SL	45	{
2c21d115 SL	46	void *hdr;
58050fce	47	struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
c4835d81	48	unsigned long f;
2c21d115 SL	49
	50	if (!msg)
	51	return NULL;
	52
c4835d81	53	spin_lock_irqsave(&ieee802154_seq_lock, f);
2c21d115	54	hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
78fe738d	55	&nl802154_family, flags, req);
c4835d81	56	spin_unlock_irqrestore(&ieee802154_seq_lock, f);
2c21d115 SL	57	if (!hdr) {
	58	nlmsg_free(msg);
	59	return NULL;
	60	}
	61
	62	return msg;
	63	}
	64
78fe738d	65	int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
2c21d115	66	{
10c9cbb1 H	67	struct nlmsghdr *nlh = nlmsg_hdr(msg);
10c9cbb1 H	68	void *hdr = genlmsg_data(nlmsg_data(nlh));
2c21d115	69
8e753dd0	70	if (genlmsg_end(msg, hdr) < 0)
2c21d115 SL	71	goto out;
2c21d115 SL	72
68eb5503	73	return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC);
2c21d115 SL	74	out:
	75	nlmsg_free(msg);
	76	return -ENOBUFS;
	77	}
	78
339b4ca5 DES	79	struct sk_buff ieee802154_nl_new_reply(struct genl_info info,
	80	int flags, u8 req)
	81	{
	82	void *hdr;
58050fce	83	struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
339b4ca5 DES	84
	85	if (!msg)
	86	return NULL;
	87
	88	hdr = genlmsg_put_reply(msg, info,
	89	&nl802154_family, flags, req);
	90	if (!hdr) {
	91	nlmsg_free(msg);
	92	return NULL;
	93	}
	94
	95	return msg;
	96	}
	97
	98	int ieee802154_nl_reply(struct sk_buff msg, struct genl_info info)
	99	{
10c9cbb1 H	100	struct nlmsghdr *nlh = nlmsg_hdr(msg);
10c9cbb1 H	101	void *hdr = genlmsg_data(nlmsg_data(nlh));
339b4ca5 DES	102
	103	if (genlmsg_end(msg, hdr) < 0)
	104	goto out;
	105
	106	return genlmsg_reply(msg, info);
	107	out:
	108	nlmsg_free(msg);
	109	return -ENOBUFS;
	110	}
	111
4534de83	112	static const struct genl_ops ieee8021154_ops[] = {
1c582d91 JB	113	/* see nl-phy.c */
	114	IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
	115	ieee802154_dump_phy),
	116	IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface),
	117	IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface),
	118	/* see nl-mac.c */
	119	IEEE802154_OP(IEEE802154_ASSOCIATE_REQ, ieee802154_associate_req),
	120	IEEE802154_OP(IEEE802154_ASSOCIATE_RESP, ieee802154_associate_resp),
	121	IEEE802154_OP(IEEE802154_DISASSOCIATE_REQ, ieee802154_disassociate_req),
	122	IEEE802154_OP(IEEE802154_SCAN_REQ, ieee802154_scan_req),
	123	IEEE802154_OP(IEEE802154_START_REQ, ieee802154_start_req),
	124	IEEE802154_DUMP(IEEE802154_LIST_IFACE, ieee802154_list_iface,
	125	ieee802154_dump_iface),
	126	};
	127
2a94fe48 JB	128	static const struct genl_multicast_group ieee802154_mcgrps[] = {
	129	[IEEE802154_COORD_MCGRP] = { .name = IEEE802154_MCAST_COORD_NAME, },
	130	[IEEE802154_BEACON_MCGRP] = { .name = IEEE802154_MCAST_BEACON_NAME, },
	131	};
2c21d115	132
2c21d115	133
2a94fe48 JB	134	int __init ieee802154_nl_init(void)
	135	{
	136	return genl_register_family_with_ops_groups(&nl802154_family,
	137	ieee8021154_ops,
	138	ieee802154_mcgrps);
2c21d115	139	}
2c21d115	140
cb6b3763	141	void __exit ieee802154_nl_exit(void)
2c21d115	142	{
78fe738d	143	genl_unregister_family(&nl802154_family);
2c21d115	144	}