530 lines
14 KiB
C
530 lines
14 KiB
C
/*
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* Netlink inteface for IEEE 802.15.4 stack
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*
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* Copyright 2007, 2008 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Written by:
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* Sergey Lapin <slapin@ossfans.org>
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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*/
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#include <linux/kernel.h>
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#include <linux/if_arp.h>
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#include <linux/netdevice.h>
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#include <net/netlink.h>
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#include <net/genetlink.h>
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#include <linux/nl802154.h>
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#include <net/ieee802154/af_ieee802154.h>
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#include <net/ieee802154/nl802154.h>
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#include <net/ieee802154/netdevice.h>
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static unsigned int ieee802154_seq_num;
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static struct genl_family ieee802154_coordinator_family = {
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.id = GENL_ID_GENERATE,
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.hdrsize = 0,
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.name = IEEE802154_NL_NAME,
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.version = 1,
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.maxattr = IEEE802154_ATTR_MAX,
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};
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static struct genl_multicast_group ieee802154_coord_mcgrp = {
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.name = IEEE802154_MCAST_COORD_NAME,
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};
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static struct genl_multicast_group ieee802154_beacon_mcgrp = {
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.name = IEEE802154_MCAST_BEACON_NAME,
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};
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/* Requests to userspace */
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static struct sk_buff *ieee802154_nl_create(int flags, u8 req)
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{
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void *hdr;
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struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
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if (!msg)
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return NULL;
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hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
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&ieee802154_coordinator_family, flags, req);
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if (!hdr) {
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nlmsg_free(msg);
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return NULL;
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}
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return msg;
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}
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static int ieee802154_nl_finish(struct sk_buff *msg)
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{
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/* XXX: nlh is right at the start of msg */
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void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
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if (!genlmsg_end(msg, hdr))
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goto out;
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return genlmsg_multicast(msg, 0, ieee802154_coord_mcgrp.id,
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GFP_ATOMIC);
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out:
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nlmsg_free(msg);
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return -ENOBUFS;
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}
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int ieee802154_nl_assoc_indic(struct net_device *dev,
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struct ieee802154_addr *addr, u8 cap)
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{
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struct sk_buff *msg;
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pr_debug("%s\n", __func__);
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if (addr->addr_type != IEEE802154_ADDR_LONG) {
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pr_err("%s: received non-long source address!\n", __func__);
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return -EINVAL;
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}
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msg = ieee802154_nl_create(0, IEEE802154_ASSOCIATE_INDIC);
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if (!msg)
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return -ENOBUFS;
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NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
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NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
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NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
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dev->dev_addr);
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NLA_PUT(msg, IEEE802154_ATTR_SRC_HW_ADDR, IEEE802154_ADDR_LEN,
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addr->hwaddr);
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NLA_PUT_U8(msg, IEEE802154_ATTR_CAPABILITY, cap);
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return ieee802154_nl_finish(msg);
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nla_put_failure:
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nlmsg_free(msg);
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return -ENOBUFS;
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}
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EXPORT_SYMBOL(ieee802154_nl_assoc_indic);
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int ieee802154_nl_assoc_confirm(struct net_device *dev, u16 short_addr,
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u8 status)
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{
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struct sk_buff *msg;
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pr_debug("%s\n", __func__);
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msg = ieee802154_nl_create(0, IEEE802154_ASSOCIATE_CONF);
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if (!msg)
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return -ENOBUFS;
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NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
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NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
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NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
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dev->dev_addr);
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NLA_PUT_U16(msg, IEEE802154_ATTR_SHORT_ADDR, short_addr);
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NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);
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return ieee802154_nl_finish(msg);
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nla_put_failure:
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nlmsg_free(msg);
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return -ENOBUFS;
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}
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EXPORT_SYMBOL(ieee802154_nl_assoc_confirm);
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int ieee802154_nl_disassoc_indic(struct net_device *dev,
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struct ieee802154_addr *addr, u8 reason)
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{
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struct sk_buff *msg;
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pr_debug("%s\n", __func__);
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msg = ieee802154_nl_create(0, IEEE802154_DISASSOCIATE_INDIC);
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if (!msg)
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return -ENOBUFS;
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NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
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NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
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NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
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dev->dev_addr);
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if (addr->addr_type == IEEE802154_ADDR_LONG)
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NLA_PUT(msg, IEEE802154_ATTR_SRC_HW_ADDR, IEEE802154_ADDR_LEN,
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addr->hwaddr);
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else
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NLA_PUT_U16(msg, IEEE802154_ATTR_SRC_SHORT_ADDR,
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addr->short_addr);
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NLA_PUT_U8(msg, IEEE802154_ATTR_REASON, reason);
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return ieee802154_nl_finish(msg);
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nla_put_failure:
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nlmsg_free(msg);
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return -ENOBUFS;
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}
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EXPORT_SYMBOL(ieee802154_nl_disassoc_indic);
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int ieee802154_nl_disassoc_confirm(struct net_device *dev, u8 status)
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{
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struct sk_buff *msg;
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pr_debug("%s\n", __func__);
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msg = ieee802154_nl_create(0, IEEE802154_DISASSOCIATE_CONF);
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if (!msg)
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return -ENOBUFS;
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NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
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NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
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NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
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dev->dev_addr);
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NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);
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return ieee802154_nl_finish(msg);
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nla_put_failure:
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nlmsg_free(msg);
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return -ENOBUFS;
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}
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EXPORT_SYMBOL(ieee802154_nl_disassoc_confirm);
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int ieee802154_nl_beacon_indic(struct net_device *dev,
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u16 panid, u16 coord_addr)
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{
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struct sk_buff *msg;
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pr_debug("%s\n", __func__);
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msg = ieee802154_nl_create(0, IEEE802154_BEACON_NOTIFY_INDIC);
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if (!msg)
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return -ENOBUFS;
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NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
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NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
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NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
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dev->dev_addr);
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NLA_PUT_U16(msg, IEEE802154_ATTR_COORD_SHORT_ADDR, coord_addr);
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NLA_PUT_U16(msg, IEEE802154_ATTR_COORD_PAN_ID, panid);
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return ieee802154_nl_finish(msg);
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nla_put_failure:
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nlmsg_free(msg);
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return -ENOBUFS;
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}
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EXPORT_SYMBOL(ieee802154_nl_beacon_indic);
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int ieee802154_nl_scan_confirm(struct net_device *dev,
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u8 status, u8 scan_type, u32 unscanned,
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u8 *edl/* , struct list_head *pan_desc_list */)
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{
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struct sk_buff *msg;
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pr_debug("%s\n", __func__);
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msg = ieee802154_nl_create(0, IEEE802154_SCAN_CONF);
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if (!msg)
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return -ENOBUFS;
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NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
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NLA_PUT_U32(msg, IEEE802154_ATTR_DEV_INDEX, dev->ifindex);
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NLA_PUT(msg, IEEE802154_ATTR_HW_ADDR, IEEE802154_ADDR_LEN,
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dev->dev_addr);
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NLA_PUT_U8(msg, IEEE802154_ATTR_STATUS, status);
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NLA_PUT_U8(msg, IEEE802154_ATTR_SCAN_TYPE, scan_type);
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NLA_PUT_U32(msg, IEEE802154_ATTR_CHANNELS, unscanned);
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if (edl)
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NLA_PUT(msg, IEEE802154_ATTR_ED_LIST, 27, edl);
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return ieee802154_nl_finish(msg);
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nla_put_failure:
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nlmsg_free(msg);
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return -ENOBUFS;
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}
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EXPORT_SYMBOL(ieee802154_nl_scan_confirm);
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/* Requests from userspace */
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static struct net_device *ieee802154_nl_get_dev(struct genl_info *info)
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{
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struct net_device *dev;
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if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
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char name[IFNAMSIZ + 1];
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nla_strlcpy(name, info->attrs[IEEE802154_ATTR_DEV_NAME],
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sizeof(name));
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dev = dev_get_by_name(&init_net, name);
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} else if (info->attrs[IEEE802154_ATTR_DEV_INDEX])
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dev = dev_get_by_index(&init_net,
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nla_get_u32(info->attrs[IEEE802154_ATTR_DEV_INDEX]));
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else
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return NULL;
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if (!dev)
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return NULL;
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if (dev->type != ARPHRD_IEEE802154) {
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dev_put(dev);
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return NULL;
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}
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return dev;
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}
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static int ieee802154_associate_req(struct sk_buff *skb,
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struct genl_info *info)
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{
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struct net_device *dev;
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struct ieee802154_addr addr;
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int ret = -EINVAL;
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if (!info->attrs[IEEE802154_ATTR_CHANNEL] ||
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!info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
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(!info->attrs[IEEE802154_ATTR_COORD_HW_ADDR] &&
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!info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]) ||
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!info->attrs[IEEE802154_ATTR_CAPABILITY])
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return -EINVAL;
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dev = ieee802154_nl_get_dev(info);
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if (!dev)
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return -ENODEV;
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if (info->attrs[IEEE802154_ATTR_COORD_HW_ADDR]) {
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addr.addr_type = IEEE802154_ADDR_LONG;
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nla_memcpy(addr.hwaddr,
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info->attrs[IEEE802154_ATTR_COORD_HW_ADDR],
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IEEE802154_ADDR_LEN);
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} else {
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addr.addr_type = IEEE802154_ADDR_SHORT;
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addr.short_addr = nla_get_u16(
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info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
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}
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addr.pan_id = nla_get_u16(info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
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ret = ieee802154_mlme_ops(dev)->assoc_req(dev, &addr,
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nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]),
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nla_get_u8(info->attrs[IEEE802154_ATTR_CAPABILITY]));
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dev_put(dev);
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return ret;
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}
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static int ieee802154_associate_resp(struct sk_buff *skb,
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struct genl_info *info)
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{
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struct net_device *dev;
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struct ieee802154_addr addr;
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int ret = -EINVAL;
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if (!info->attrs[IEEE802154_ATTR_STATUS] ||
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!info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] ||
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!info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR])
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return -EINVAL;
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dev = ieee802154_nl_get_dev(info);
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if (!dev)
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return -ENODEV;
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addr.addr_type = IEEE802154_ADDR_LONG;
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nla_memcpy(addr.hwaddr, info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],
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IEEE802154_ADDR_LEN);
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addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
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ret = ieee802154_mlme_ops(dev)->assoc_resp(dev, &addr,
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nla_get_u16(info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]),
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nla_get_u8(info->attrs[IEEE802154_ATTR_STATUS]));
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dev_put(dev);
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return ret;
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}
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static int ieee802154_disassociate_req(struct sk_buff *skb,
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struct genl_info *info)
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{
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struct net_device *dev;
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struct ieee802154_addr addr;
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int ret = -EINVAL;
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if ((!info->attrs[IEEE802154_ATTR_DEST_HW_ADDR] &&
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!info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]) ||
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!info->attrs[IEEE802154_ATTR_REASON])
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return -EINVAL;
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dev = ieee802154_nl_get_dev(info);
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if (!dev)
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return -ENODEV;
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if (info->attrs[IEEE802154_ATTR_DEST_HW_ADDR]) {
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addr.addr_type = IEEE802154_ADDR_LONG;
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nla_memcpy(addr.hwaddr,
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info->attrs[IEEE802154_ATTR_DEST_HW_ADDR],
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IEEE802154_ADDR_LEN);
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} else {
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addr.addr_type = IEEE802154_ADDR_SHORT;
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addr.short_addr = nla_get_u16(
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info->attrs[IEEE802154_ATTR_DEST_SHORT_ADDR]);
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}
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addr.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
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ret = ieee802154_mlme_ops(dev)->disassoc_req(dev, &addr,
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nla_get_u8(info->attrs[IEEE802154_ATTR_REASON]));
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dev_put(dev);
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return ret;
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}
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/*
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* PANid, channel, beacon_order = 15, superframe_order = 15,
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* PAN_coordinator, battery_life_extension = 0,
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* coord_realignment = 0, security_enable = 0
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*/
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static int ieee802154_start_req(struct sk_buff *skb, struct genl_info *info)
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{
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struct net_device *dev;
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struct ieee802154_addr addr;
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u8 channel, bcn_ord, sf_ord;
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int pan_coord, blx, coord_realign;
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int ret;
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if (!info->attrs[IEEE802154_ATTR_COORD_PAN_ID] ||
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!info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR] ||
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!info->attrs[IEEE802154_ATTR_CHANNEL] ||
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!info->attrs[IEEE802154_ATTR_BCN_ORD] ||
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!info->attrs[IEEE802154_ATTR_SF_ORD] ||
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!info->attrs[IEEE802154_ATTR_PAN_COORD] ||
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!info->attrs[IEEE802154_ATTR_BAT_EXT] ||
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!info->attrs[IEEE802154_ATTR_COORD_REALIGN]
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)
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return -EINVAL;
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dev = ieee802154_nl_get_dev(info);
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if (!dev)
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return -ENODEV;
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addr.addr_type = IEEE802154_ADDR_SHORT;
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addr.short_addr = nla_get_u16(
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info->attrs[IEEE802154_ATTR_COORD_SHORT_ADDR]);
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addr.pan_id = nla_get_u16(info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
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channel = nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]);
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bcn_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_BCN_ORD]);
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sf_ord = nla_get_u8(info->attrs[IEEE802154_ATTR_SF_ORD]);
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pan_coord = nla_get_u8(info->attrs[IEEE802154_ATTR_PAN_COORD]);
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blx = nla_get_u8(info->attrs[IEEE802154_ATTR_BAT_EXT]);
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coord_realign = nla_get_u8(info->attrs[IEEE802154_ATTR_COORD_REALIGN]);
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ret = ieee802154_mlme_ops(dev)->start_req(dev, &addr, channel,
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bcn_ord, sf_ord, pan_coord, blx, coord_realign);
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dev_put(dev);
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return ret;
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}
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static int ieee802154_scan_req(struct sk_buff *skb, struct genl_info *info)
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{
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struct net_device *dev;
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int ret;
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u8 type;
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u32 channels;
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u8 duration;
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if (!info->attrs[IEEE802154_ATTR_SCAN_TYPE] ||
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!info->attrs[IEEE802154_ATTR_CHANNELS] ||
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!info->attrs[IEEE802154_ATTR_DURATION])
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return -EINVAL;
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dev = ieee802154_nl_get_dev(info);
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if (!dev)
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return -ENODEV;
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type = nla_get_u8(info->attrs[IEEE802154_ATTR_SCAN_TYPE]);
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channels = nla_get_u32(info->attrs[IEEE802154_ATTR_CHANNELS]);
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duration = nla_get_u8(info->attrs[IEEE802154_ATTR_DURATION]);
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ret = ieee802154_mlme_ops(dev)->scan_req(dev, type, channels,
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duration);
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dev_put(dev);
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return ret;
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}
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#define IEEE802154_OP(_cmd, _func) \
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{ \
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.cmd = _cmd, \
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.policy = ieee802154_policy, \
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.doit = _func, \
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.dumpit = NULL, \
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.flags = GENL_ADMIN_PERM, \
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}
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static struct genl_ops ieee802154_coordinator_ops[] = {
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|
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),
|
|
};
|
|
|
|
static int __init ieee802154_nl_init(void)
|
|
{
|
|
int rc;
|
|
int i;
|
|
|
|
rc = genl_register_family(&ieee802154_coordinator_family);
|
|
if (rc)
|
|
goto fail;
|
|
|
|
rc = genl_register_mc_group(&ieee802154_coordinator_family,
|
|
&ieee802154_coord_mcgrp);
|
|
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);
|
|
return rc;
|
|
}
|
|
module_init(ieee802154_nl_init);
|
|
|
|
static void __exit ieee802154_nl_exit(void)
|
|
{
|
|
genl_unregister_family(&ieee802154_coordinator_family);
|
|
}
|
|
module_exit(ieee802154_nl_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("ieee 802.15.4 configuration interface");
|
|
|