| /* |
| * 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/af_ieee802154.h> |
| #include <net/nl802154.h> |
| #include <net/ieee802154_netdev.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) |
| 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); |
| |
| MODULE_LICENSE("GPL v2"); |
| MODULE_DESCRIPTION("ieee 802.15.4 configuration interface"); |
| |