mirror of https://gitee.com/openkylin/linux.git
140 lines
3.0 KiB
C
140 lines
3.0 KiB
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)
|
|
{
|
|
/* XXX: nlh is right at the start of msg */
|
|
void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
|
|
|
|
if (genlmsg_end(msg, hdr) < 0)
|
|
goto out;
|
|
|
|
return genlmsg_multicast(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)
|
|
{
|
|
/* XXX: nlh is right at the start of msg */
|
|
void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
|
|
|
|
if (genlmsg_end(msg, hdr) < 0)
|
|
goto out;
|
|
|
|
return genlmsg_reply(msg, info);
|
|
out:
|
|
nlmsg_free(msg);
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
int __init ieee802154_nl_init(void)
|
|
{
|
|
int rc;
|
|
|
|
rc = genl_register_family(&nl802154_family);
|
|
if (rc)
|
|
goto fail;
|
|
|
|
rc = nl802154_mac_register();
|
|
if (rc)
|
|
goto fail;
|
|
|
|
rc = nl802154_phy_register();
|
|
if (rc)
|
|
goto fail;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
genl_unregister_family(&nl802154_family);
|
|
return rc;
|
|
}
|
|
|
|
void __exit ieee802154_nl_exit(void)
|
|
{
|
|
genl_unregister_family(&nl802154_family);
|
|
}
|
|
|