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Commit 78fe738d authored by Dmitry Eremin-Solenikov's avatar Dmitry Eremin-Solenikov
Browse files

ieee802154: split away MAC commands implementation 



Move all mac-related stuff to separate file so that ieee802154/netlink.c
contains only generic code.

Signed-off-by: default avatarDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
parent cb6b3763

net/ieee802154/Makefile

+1 −1
Original line number Diff line number Diff line 
obj-$(CONFIG_IEEE802154) +=	ieee802154.o af_802154.o

ieee802154-y		:= netlink.o nl_policy.o wpan-class.o

ieee802154-y		:= netlink.o nl-mac.o nl_policy.o wpan-class.o

af_802154-y		:= af_ieee802154.o raw.o dgram.o



ccflags-y += -Wall -DDEBUG

net/ieee802154/ieee802154.h

0 → 100644
+48 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2007, 2008, 2009 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.

 *

 */

#ifndef IEEE_802154_LOCAL_H

#define IEEE_802154_LOCAL_H



int __init ieee802154_nl_init(void);

void __exit ieee802154_nl_exit(void);



#define IEEE802154_OP(_cmd, _func)			\

	{						\

		.cmd	= _cmd,				\

		.policy	= ieee802154_policy,		\

		.doit	= _func,			\

		.dumpit	= NULL,				\

		.flags	= GENL_ADMIN_PERM,		\

	}



#define IEEE802154_DUMP(_cmd, _func, _dump)		\

	{						\

		.cmd	= _cmd,				\

		.policy	= ieee802154_policy,		\

		.doit	= _func,			\

		.dumpit	= _dump,			\

	}



struct sk_buff *ieee802154_nl_create(int flags, u8 req);

int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group);



extern struct genl_family nl802154_family;

int nl802154_mac_register(void);

int nl802154_phy_register(void);



#endif

net/ieee802154/netlink.c

+11 −594
Original line number Diff line number Diff line
@@ -23,21 +23,15 @@ 
 */



#include <linux/kernel.h>

#include <linux/if_arp.h>

#include <linux/netdevice.h>

#include <net/netlink.h>

#include <net/genetlink.h>

#include <net/sock.h>

#include <linux/nl802154.h>

#include <net/af_ieee802154.h>

#include <net/nl802154.h>

#include <net/ieee802154.h>

#include <net/ieee802154_netdev.h>



#include "ieee802154.h"



static unsigned int ieee802154_seq_num;

static DEFINE_SPINLOCK(ieee802154_seq_lock);



static struct genl_family ieee802154_coordinator_family = {

struct genl_family nl802154_family = {

	.id		= GENL_ID_GENERATE,

	.hdrsize	= 0,

	.name		= IEEE802154_NL_NAME,
@@ -45,16 +39,8 @@ static struct genl_family ieee802154_coordinator_family = { 
	.maxattr	= IEEE802154_ATTR_MAX,

};



static struct genl_multicast_group ieee802154_coord_mcgrp = {

	.name		= IEEE802154_MCAST_COORD_NAME,

};



static struct genl_multicast_group ieee802154_beacon_mcgrp = {

	.name		= IEEE802154_MCAST_BEACON_NAME,

};



/* Requests to userspace */

static struct sk_buff *ieee802154_nl_create(int flags, u8 req)

struct sk_buff *ieee802154_nl_create(int flags, u8 req)

{

	void *hdr;

	struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
@@ -65,7 +51,7 @@ static struct sk_buff *ieee802154_nl_create(int flags, u8 req) 


	spin_lock_irqsave(&ieee802154_seq_lock, f);

	hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,

			&ieee802154_coordinator_family, flags, req);

			&nl802154_family, flags, req);

	spin_unlock_irqrestore(&ieee802154_seq_lock, f);

	if (!hdr) {

		nlmsg_free(msg);
@@ -75,7 +61,7 @@ static struct sk_buff *ieee802154_nl_create(int flags, u8 req) 
	return msg;

}



static int ieee802154_nl_finish(struct sk_buff *msg)

int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)

{

	/* XXX: nlh is right at the start of msg */

	void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
@@ -83,602 +69,33 @@ static int ieee802154_nl_finish(struct sk_buff *msg) 
	if (genlmsg_end(msg, hdr) < 0)

		goto out;



	return genlmsg_multicast(msg, 0, ieee802154_coord_mcgrp.id,

			GFP_ATOMIC);

	return genlmsg_multicast(msg, 0, group, GFP_ATOMIC);

out:

	nlmsg_free(msg);

	return -ENOBUFS;

}



int ieee802154_nl_assoc_indic(struct net_device *dev,

		struct ieee802154_addr *addr, u8 cap)

{

	struct sk_buff *msg;



	pr_debug("%s\n", __func__);



	if (addr->addr_type != IEEE802154_ADDR_LONG) {

		pr_err("%s: received non-long source address!\n", __func__);

		return -EINVAL;

	}



	msg = ieee802154_nl_create(0, IEEE802154_ASSOCIATE_INDIC);

	if (!msg)

		return -ENOBUFS;



	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);

	NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);

	NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,

			dev->dev_addr);



	NLA_PUT(msg, IEEE802154_ATTR_SRC_HW_ADDR, IEEE802154_ADDR_LEN,

			addr->hwaddr);



	NLA_PUT_U8(msg, IEEE802154_ATTR_CAPABILITY, cap);



	return ieee802154_nl_finish(msg);



nla_put_failure:

	nlmsg_free(msg);

	return -ENOBUFS;

}

EXPORT_SYMBOL(ieee802154_nl_assoc_indic);



int ieee802154_nl_assoc_confirm(struct net_device *dev, u16 short_addr,

		u8 status)

{

	struct sk_buff *msg;



	pr_debug("%s\n", __func__);



	msg = ieee802154_nl_create(0, IEEE802154_ASSOCIATE_CONF);

	if (!msg)

		return -ENOBUFS;



	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);

	NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);

	NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,

			dev->dev_addr);



	NLA_PUT_U16(msg, IEEE802154_ATTR_SHORT_ADDR, short_addr);

	NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);



	return ieee802154_nl_finish(msg);



nla_put_failure:

	nlmsg_free(msg);

	return -ENOBUFS;

}

EXPORT_SYMBOL(ieee802154_nl_assoc_confirm);



int ieee802154_nl_disassoc_indic(struct net_device *dev,

		struct ieee802154_addr *addr, u8 reason)

{

	struct sk_buff *msg;



	pr_debug("%s\n", __func__);



	msg = ieee802154_nl_create(0, IEEE802154_DISASSOCIATE_INDIC);

	if (!msg)

		return -ENOBUFS;



	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);

	NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);

	NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,

			dev->dev_addr);



	if (addr->addr_type == IEEE802154_ADDR_LONG)

		NLA_PUT(msg, IEEE802154_ATTR_SRC_HW_ADDR, IEEE802154_ADDR_LEN,

				addr->hwaddr);

	else

		NLA_PUT_U16(msg, IEEE802154_ATTR_SRC_SHORT_ADDR,

				addr->short_addr);



	NLA_PUT_U8(msg, IEEE802154_ATTR_REASON, reason);



	return ieee802154_nl_finish(msg);



nla_put_failure:

	nlmsg_free(msg);

	return -ENOBUFS;

}

EXPORT_SYMBOL(ieee802154_nl_disassoc_indic);



int ieee802154_nl_disassoc_confirm(struct net_device *dev, u8 status)

{

	struct sk_buff *msg;



	pr_debug("%s\n", __func__);



	msg = ieee802154_nl_create(0, IEEE802154_DISASSOCIATE_CONF);

	if (!msg)

		return -ENOBUFS;



	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);

	NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);

	NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,

			dev->dev_addr);



	NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);



	return ieee802154_nl_finish(msg);



nla_put_failure:

	nlmsg_free(msg);

	return -ENOBUFS;

}

EXPORT_SYMBOL(ieee802154_nl_disassoc_confirm);



int ieee802154_nl_beacon_indic(struct net_device *dev,

		u16 panid, u16 coord_addr)

{

	struct sk_buff *msg;



	pr_debug("%s\n", __func__);



	msg = ieee802154_nl_create(0, IEEE802154_BEACON_NOTIFY_INDIC);

	if (!msg)

		return -ENOBUFS;



	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);

	NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);

	NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,

			dev->dev_addr);

	NLA_PUT_U16(msg, IEEE802154_ATTR_COORD_SHORT_ADDR, coord_addr);

	NLA_PUT_U16(msg, IEEE802154_ATTR_COORD_PAN_ID, panid);



	return ieee802154_nl_finish(msg);



nla_put_failure:

	nlmsg_free(msg);

	return -ENOBUFS;

}

EXPORT_SYMBOL(ieee802154_nl_beacon_indic);



int ieee802154_nl_scan_confirm(struct net_device *dev,

		u8 status, u8 scan_type, u32 unscanned, u8 page,

		u8 *edl/* , struct list_head *pan_desc_list */)

{

	struct sk_buff *msg;



	pr_debug("%s\n", __func__);



	msg = ieee802154_nl_create(0, IEEE802154_SCAN_CONF);

	if (!msg)

		return -ENOBUFS;



	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);

	NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);

	NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,

			dev->dev_addr);



	NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);

	NLA_PUT_U8(msg, IEEE802154_ATTR_SCAN_TYPE, scan_type);

	NLA_PUT_U32(msg, IEEE802154_ATTR_CHANNELS, unscanned);

	NLA_PUT_U8(msg, IEEE802154_ATTR_PAGE, page);



	if (edl)

		NLA_PUT(msg, IEEE802154_ATTR_ED_LIST, 27, edl);



	return ieee802154_nl_finish(msg);



nla_put_failure:

	nlmsg_free(msg);

	return -ENOBUFS;

}

EXPORT_SYMBOL(ieee802154_nl_scan_confirm);



int ieee802154_nl_start_confirm(struct net_device *dev, u8 status)

{

	struct sk_buff *msg;



	pr_debug("%s\n", __func__);



	msg = ieee802154_nl_create(0, IEEE802154_START_CONF);

	if (!msg)

		return -ENOBUFS;



	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);

	NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);

	NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,

			dev->dev_addr);



	NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);



	return ieee802154_nl_finish(msg);



nla_put_failure:

	nlmsg_free(msg);

	return -ENOBUFS;

}

EXPORT_SYMBOL(ieee802154_nl_start_confirm);



static int ieee802154_nl_fill_iface(struct sk_buff *msg, u32 pid,

	u32 seq, int flags, struct net_device *dev)

{

	void *hdr;



	pr_debug("%s\n", __func__);



	hdr = genlmsg_put(msg, 0, seq, &ieee802154_coordinator_family, flags,

		IEEE802154_LIST_IFACE);

	if (!hdr)

		goto out;



	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);

	NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);



	NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,

		dev->dev_addr);

	NLA_PUT_U16(msg, IEEE802154_ATTR_SHORT_ADDR,

		ieee802154_mlme_ops(dev)->get_short_addr(dev));

	NLA_PUT_U16(msg, IEEE802154_ATTR_PAN_ID,

		ieee802154_mlme_ops(dev)->get_pan_id(dev));

	return genlmsg_end(msg, hdr);



nla_put_failure:

	genlmsg_cancel(msg, hdr);

out:

	return -EMSGSIZE;

}



/* Requests from userspace */

static struct net_device *ieee802154_nl_get_dev(struct genl_info *info)

{

	struct net_device *dev;



	if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {

		char name[IFNAMSIZ + 1];

		nla_strlcpy(name, info->attrs[IEEE802154_ATTR_DEV_NAME],

				sizeof(name));

		dev = dev_get_by_name(&init_net, name);

	} else if (info->attrs[IEEE802154_ATTR_DEV_INDEX])

		dev = dev_get_by_index(&init_net,

			nla_get_u32(info->attrs[IEEE802154_ATTR_DEV_INDEX]));

	else

		return NULL;



	if (!dev)

		return NULL;



	if (dev->type != ARPHRD_IEEE802154) {

		dev_put(dev);

		return NULL;

	}



	return dev;

}



static int ieee802154_associate_req(struct sk_buff *skb,

		struct genl_info *info)

{

	struct net_device *dev;

	struct ieee802154_addr addr;

	u8 page;

	int ret = -EINVAL;



	if (!info->attrs[IEEE802154_ATTR_CHANNEL] ||

	    !info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||

	    (!info->attrs[IEEE802154_ATTR_COORD_HW_ADDR] &&

		!info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]) ||

	    !info->attrs[IEEE802154_ATTR_CAPABILITY])

		return -EINVAL;



	dev = ieee802154_nl_get_dev(info);

	if (!dev)

		return -ENODEV;



	if (info->attrs[IEEE802154_ATTR_COORD_HW_ADDR]) {

		addr.addr_type = IEEE802154_ADDR_LONG;

		nla_memcpy(addr.hwaddr,

				info->attrs[IEEE802154_ATTR_COORD_HW_ADDR],

				IEEE802154_ADDR_LEN);

	} else {

		addr.addr_type = IEEE802154_ADDR_SHORT;

		addr.short_addr = nla_get_u16(

				info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);

	}

	addr.pan_id = nla_get_u16(info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);



	if (info->attrs[IEEE802154_ATTR_PAGE])

		page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);

	else

		page = 0;



	ret = ieee802154_mlme_ops(dev)->assoc_req(dev, &addr,

			nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]),

			page,

			nla_get_u8(info->attrs[IEEE802154_ATTR_CAPABILITY]));



	dev_put(dev);

	return ret;

}



static int ieee802154_associate_resp(struct sk_buff *skb,

		struct genl_info *info)

{

	struct net_device *dev;

	struct ieee802154_addr addr;

	int ret = -EINVAL;



	if (!info->attrs[IEEE802154_ATTR_STATUS] ||

	    !info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] ||

	    !info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR])

		return -EINVAL;



	dev = ieee802154_nl_get_dev(info);

	if (!dev)

		return -ENODEV;



	addr.addr_type = IEEE802154_ADDR_LONG;

	nla_memcpy(addr.hwaddr, info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],

			IEEE802154_ADDR_LEN);

	addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);





	ret = ieee802154_mlme_ops(dev)->assoc_resp(dev, &addr,

		nla_get_u16(info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]),

		nla_get_u8(info->attrs[IEEE802154_ATTR_STATUS]));



	dev_put(dev);

	return ret;

}



static int ieee802154_disassociate_req(struct sk_buff *skb,

		struct genl_info *info)

{

	struct net_device *dev;

	struct ieee802154_addr addr;

	int ret = -EINVAL;



	if ((!info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] &&

		!info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]) ||

	    !info->attrs[IEEE802154_ATTR_REASON])

		return -EINVAL;



	dev = ieee802154_nl_get_dev(info);

	if (!dev)

		return -ENODEV;



	if (info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]) {

		addr.addr_type = IEEE802154_ADDR_LONG;

		nla_memcpy(addr.hwaddr,

				info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],

				IEEE802154_ADDR_LEN);

	} else {

		addr.addr_type = IEEE802154_ADDR_SHORT;

		addr.short_addr = nla_get_u16(

				info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]);

	}

	addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);



	ret = ieee802154_mlme_ops(dev)->disassoc_req(dev, &addr,

			nla_get_u8(info->attrs[IEEE802154_ATTR_REASON]));



	dev_put(dev);

	return ret;

}



/*

 * PANid, channel, beacon_order = 15, superframe_order = 15,

 * PAN_coordinator, battery_life_extension = 0,

 * coord_realignment = 0, security_enable = 0

*/

static int ieee802154_start_req(struct sk_buff *skb, struct genl_info *info)

{

	struct net_device *dev;

	struct ieee802154_addr addr;



	u8 channel, bcn_ord, sf_ord;

	u8 page;

	int pan_coord, blx, coord_realign;

	int ret;



	if (!info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||

	    !info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR] ||

	    !info->attrs[IEEE802154_ATTR_CHANNEL] ||

	    !info->attrs[IEEE802154_ATTR_BCN_ORD] ||

	    !info->attrs[IEEE802154_ATTR_SF_ORD] ||

	    !info->attrs[IEEE802154_ATTR_PAN_COORD] ||

	    !info->attrs[IEEE802154_ATTR_BAT_EXT] ||

	    !info->attrs[IEEE802154_ATTR_COORD_REALIGN]

	 )

		return -EINVAL;



	dev = ieee802154_nl_get_dev(info);

	if (!dev)

		return -ENODEV;



	addr.addr_type = IEEE802154_ADDR_SHORT;

	addr.short_addr = nla_get_u16(

			info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);

	addr.pan_id = nla_get_u16(info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);



	channel = nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]);

	bcn_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_BCN_ORD]);

	sf_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_SF_ORD]);

	pan_coord = nla_get_u8(info->attrs[IEEE802154_ATTR_PAN_COORD]);

	blx = nla_get_u8(info->attrs[IEEE802154_ATTR_BAT_EXT]);

	coord_realign = nla_get_u8(info->attrs[IEEE802154_ATTR_COORD_REALIGN]);



	if (info->attrs[IEEE802154_ATTR_PAGE])

		page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);

	else

		page = 0;





	if (addr.short_addr == IEEE802154_ADDR_BROADCAST) {

		ieee802154_nl_start_confirm(dev, IEEE802154_NO_SHORT_ADDRESS);

		dev_put(dev);

		return -EINVAL;

	}



	ret = ieee802154_mlme_ops(dev)->start_req(dev, &addr, channel, page,

		bcn_ord, sf_ord, pan_coord, blx, coord_realign);



	dev_put(dev);

	return ret;

}



static int ieee802154_scan_req(struct sk_buff *skb, struct genl_info *info)

{

	struct net_device *dev;

	int ret;

	u8 type;

	u32 channels;

	u8 duration;

	u8 page;



	if (!info->attrs[IEEE802154_ATTR_SCAN_TYPE] ||

	    !info->attrs[IEEE802154_ATTR_CHANNELS] ||

	    !info->attrs[IEEE802154_ATTR_DURATION])

		return -EINVAL;



	dev = ieee802154_nl_get_dev(info);

	if (!dev)

		return -ENODEV;



	type = nla_get_u8(info->attrs[IEEE802154_ATTR_SCAN_TYPE]);

	channels = nla_get_u32(info->attrs[IEEE802154_ATTR_CHANNELS]);

	duration = nla_get_u8(info->attrs[IEEE802154_ATTR_DURATION]);



	if (info->attrs[IEEE802154_ATTR_PAGE])

		page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);

	else

		page = 0;





	ret = ieee802154_mlme_ops(dev)->scan_req(dev, type, channels, page,

			duration);



	dev_put(dev);

	return ret;

}



static int ieee802154_list_iface(struct sk_buff *skb,

	struct genl_info *info)

{

	/* Request for interface name, index, type, IEEE address,

	   PAN Id, short address */

	struct sk_buff *msg;

	struct net_device *dev = NULL;

	int rc = -ENOBUFS;



	pr_debug("%s\n", __func__);



	dev = ieee802154_nl_get_dev(info);

	if (!dev)

		return -ENODEV;



	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);

	if (!msg)

		goto out_dev;



	rc = ieee802154_nl_fill_iface(msg, info->snd_pid, info->snd_seq,

			0, dev);

	if (rc < 0)

		goto out_free;



	dev_put(dev);



	return genlmsg_unicast(&init_net, msg, info->snd_pid);

out_free:

	nlmsg_free(msg);

out_dev:

	dev_put(dev);

	return rc;



}



static int ieee802154_dump_iface(struct sk_buff *skb,

	struct netlink_callback *cb)

{

	struct net *net = sock_net(skb->sk);

	struct net_device *dev;

	int idx;

	int s_idx = cb->args[0];



	pr_debug("%s\n", __func__);



	idx = 0;

	for_each_netdev(net, dev) {

		if (idx < s_idx || (dev->type != ARPHRD_IEEE802154))

			goto cont;



		if (ieee802154_nl_fill_iface(skb, NETLINK_CB(cb->skb).pid,

			cb->nlh->nlmsg_seq, NLM_F_MULTI, dev) < 0)

			break;

cont:

		idx++;

	}

	cb->args[0] = idx;



	return skb->len;

}



#define IEEE802154_OP(_cmd, _func)			\

	{						\

		.cmd	= _cmd,				\

		.policy	= ieee802154_policy,		\

		.doit	= _func,			\

		.dumpit	= NULL,				\

		.flags	= GENL_ADMIN_PERM,		\

	}



#define IEEE802154_DUMP(_cmd, _func, _dump)		\

	{						\

		.cmd	= _cmd,				\

		.policy	= ieee802154_policy,		\

		.doit	= _func,			\

		.dumpit	= _dump,			\

	}



static struct genl_ops ieee802154_coordinator_ops[] = {

	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),

};



int __init ieee802154_nl_init(void)

{

	int rc;

	int i;



	rc = genl_register_family(&ieee802154_coordinator_family);

	rc = genl_register_family(&nl802154_family);

	if (rc)

		goto fail;



	rc = genl_register_mc_group(&ieee802154_coordinator_family,

			&ieee802154_coord_mcgrp);

	rc = nl802154_mac_register();

	if (rc)

		goto fail;



	rc = genl_register_mc_group(&ieee802154_coordinator_family,

			&ieee802154_beacon_mcgrp);

	if (rc)

		goto fail;





	for (i = 0; i < ARRAY_SIZE(ieee802154_coordinator_ops); i++) {

		rc = genl_register_ops(&ieee802154_coordinator_family,

				&ieee802154_coordinator_ops[i]);

		if (rc)

			goto fail;

	}



	return 0;



fail:

	genl_unregister_family(&ieee802154_coordinator_family);

	genl_unregister_family(&nl802154_family);

	return rc;

}



void __exit ieee802154_nl_exit(void)

{

	genl_unregister_family(&ieee802154_coordinator_family);

	genl_unregister_family(&nl802154_family);

}

net/ieee802154/nl-mac.c

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