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authorSergey Lapin <slapin@ossfans.org>2009-06-08 12:18:49 +0000
committerDavid S. Miller <davem@davemloft.net>2009-06-09 05:25:33 -0700
commit2c21d11518b688cd4c8e7ddfcd4ba41482ad075b (patch)
tree9f662cdc499da079616b882b98ab71e488bd5a4d /net/ieee802154/netlink.c
parent9ec7671603573ede31207eb5b0b3e1aa211b2854 (diff)
downloadlinux-2.6.34-ux500-2c21d11518b688cd4c8e7ddfcd4ba41482ad075b.tar.gz
net: add NL802154 interface for configuration of 802.15.4 devices
Add a netlink interface for configuration of IEEE 802.15.4 device. Also this interface specifies events notification sent by devices towards higher layers. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Sergey Lapin <slapin@ossfans.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ieee802154/netlink.c')
-rw-r--r--net/ieee802154/netlink.c523
1 files changed, 523 insertions, 0 deletions
diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c
new file mode 100644
index 00000000000..105ad10876a
--- /dev/null
+++ b/net/ieee802154/netlink.c
@@ -0,0 +1,523 @@
+/*
+ * 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>
+ */
+
+#include <linux/kernel.h>
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
+#include <linux/nl802154.h>
+#include <net/ieee802154/af_ieee802154.h>
+#include <net/ieee802154/nl802154.h>
+#include <net/ieee802154/netdevice.h>
+
+static unsigned int ieee802154_seq_num;
+
+static struct genl_family ieee802154_coordinator_family = {
+ .id = GENL_ID_GENERATE,
+ .hdrsize = 0,
+ .name = IEEE802154_NL_NAME,
+ .version = 1,
+ .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)
+{
+ void *hdr;
+ struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+
+ if (!msg)
+ return NULL;
+
+ hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
+ &ieee802154_coordinator_family, flags, req);
+ if (!hdr) {
+ nlmsg_free(msg);
+ return NULL;
+ }
+
+ return msg;
+}
+
+static int ieee802154_nl_finish(struct sk_buff *msg)
+{
+ /* XXX: nlh is right at the start of msg */
+ void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
+
+ if (!genlmsg_end(msg, hdr))
+ goto out;
+
+ return genlmsg_multicast(msg, 0, ieee802154_coord_mcgrp.id,
+ 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 *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);
+
+ 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);
+
+/* 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->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;
+ 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]);
+
+ ret = ieee802154_mlme_ops(dev)->assoc_req(dev, &addr,
+ nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]),
+ 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;
+ 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]);
+
+ ret = ieee802154_mlme_ops(dev)->start_req(dev, &addr, channel,
+ 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;
+
+ 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]);
+
+ ret = ieee802154_mlme_ops(dev)->scan_req(dev, type, channels,
+ duration);
+
+ dev_put(dev);
+ return ret;
+}
+
+#define IEEE802154_OP(_cmd, _func) \
+ { \
+ .cmd = _cmd, \
+ .policy = ieee802154_policy, \
+ .doit = _func, \
+ .dumpit = NULL, \
+ .flags = GENL_ADMIN_PERM, \
+ }
+
+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),
+};
+
+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);
+