/*

   * Netlink interface 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.
   *

   * 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);

  /* 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));

  	genlmsg_end(msg, hdr);

  	return genlmsg_multicast(&nl802154_family, msg, 0, group, GFP_ATOMIC);

  }

  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));

  	genlmsg_end(msg, hdr);

  
  	return genlmsg_reply(msg, info);

  }

  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),

  	IEEE802154_OP(IEEE802154_SET_MACPARAMS, ieee802154_set_macparams),

  	IEEE802154_OP(IEEE802154_LLSEC_GETPARAMS, ieee802154_llsec_getparams),
  	IEEE802154_OP(IEEE802154_LLSEC_SETPARAMS, ieee802154_llsec_setparams),
  	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_KEY, NULL,
  			ieee802154_llsec_dump_keys),
  	IEEE802154_OP(IEEE802154_LLSEC_ADD_KEY, ieee802154_llsec_add_key),
  	IEEE802154_OP(IEEE802154_LLSEC_DEL_KEY, ieee802154_llsec_del_key),
  	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEV, NULL,
  			ieee802154_llsec_dump_devs),
  	IEEE802154_OP(IEEE802154_LLSEC_ADD_DEV, ieee802154_llsec_add_dev),
  	IEEE802154_OP(IEEE802154_LLSEC_DEL_DEV, ieee802154_llsec_del_dev),
  	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_DEVKEY, NULL,
  			ieee802154_llsec_dump_devkeys),
  	IEEE802154_OP(IEEE802154_LLSEC_ADD_DEVKEY, ieee802154_llsec_add_devkey),
  	IEEE802154_OP(IEEE802154_LLSEC_DEL_DEVKEY, ieee802154_llsec_del_devkey),
  	IEEE802154_DUMP(IEEE802154_LLSEC_LIST_SECLEVEL, NULL,
  			ieee802154_llsec_dump_seclevels),
  	IEEE802154_OP(IEEE802154_LLSEC_ADD_SECLEVEL,
  		      ieee802154_llsec_add_seclevel),
  	IEEE802154_OP(IEEE802154_LLSEC_DEL_SECLEVEL,
  		      ieee802154_llsec_del_seclevel),

  };

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

  struct genl_family nl802154_family __ro_after_init = {

  	.hdrsize	= 0,
  	.name		= IEEE802154_NL_NAME,
  	.version	= 1,
  	.maxattr	= IEEE802154_ATTR_MAX,
  	.module		= THIS_MODULE,
  	.ops		= ieee8021154_ops,
  	.n_ops		= ARRAY_SIZE(ieee8021154_ops),
  	.mcgrps		= ieee802154_mcgrps,
  	.n_mcgrps	= ARRAY_SIZE(ieee802154_mcgrps),
  };

  int __init ieee802154_nl_init(void)
  {

  	return genl_register_family(&nl802154_family);

  }

  void ieee802154_nl_exit(void)

  {

  	genl_unregister_family(&nl802154_family);

  }