2 * Netlink inteface for IEEE 802.15.4 stack
4 * Copyright 2007, 2008 Siemens AG
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 * Sergey Lapin <slapin@ossfans.org>
21 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
22 * Maxim Osipov <maxim.osipov@siemens.com>
25 #include <linux/kernel.h>
26 #include <linux/slab.h>
27 #include <linux/if_arp.h>
28 #include <net/netlink.h>
29 #include <net/genetlink.h>
30 #include <net/wpan-phy.h>
31 #include <net/af_ieee802154.h>
32 #include <net/ieee802154_netdev.h>
33 #include <net/rtnetlink.h> /* for rtnl_{un,}lock */
34 #include <linux/nl802154.h>
36 #include "ieee802154.h"
38 static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 portid,
39 u32 seq, int flags, struct wpan_phy *phy)
43 uint32_t *buf = kzalloc(32 * sizeof(uint32_t), GFP_KERNEL);
45 pr_debug("%s\n", __func__);
50 hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags,
55 mutex_lock(&phy->pib_lock);
56 if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
57 nla_put_u8(msg, IEEE802154_ATTR_PAGE, phy->current_page) ||
58 nla_put_u8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel) ||
59 nla_put_s8(msg, IEEE802154_ATTR_TXPOWER, phy->transmit_power) ||
60 nla_put_u8(msg, IEEE802154_ATTR_LBT_ENABLED, phy->lbt) ||
61 nla_put_u8(msg, IEEE802154_ATTR_CCA_MODE, phy->cca_mode) ||
62 nla_put_s32(msg, IEEE802154_ATTR_CCA_ED_LEVEL, phy->cca_ed_level) ||
63 nla_put_u8(msg, IEEE802154_ATTR_CSMA_RETRIES, phy->csma_retries) ||
64 nla_put_u8(msg, IEEE802154_ATTR_CSMA_MIN_BE, phy->min_be) ||
65 nla_put_u8(msg, IEEE802154_ATTR_CSMA_MAX_BE, phy->max_be) ||
66 nla_put_s8(msg, IEEE802154_ATTR_FRAME_RETRIES, phy->frame_retries))
68 for (i = 0; i < 32; i++) {
69 if (phy->channels_supported[i])
70 buf[pages++] = phy->channels_supported[i] | (i << 27);
73 nla_put(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST,
74 pages * sizeof(uint32_t), buf))
76 mutex_unlock(&phy->pib_lock);
78 return genlmsg_end(msg, hdr);
81 mutex_unlock(&phy->pib_lock);
82 genlmsg_cancel(msg, hdr);
88 int ieee802154_list_phy(struct sk_buff *skb, struct genl_info *info)
90 /* Request for interface name, index, type, IEEE address,
91 PAN Id, short address */
97 pr_debug("%s\n", __func__);
99 if (!info->attrs[IEEE802154_ATTR_PHY_NAME])
102 name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
103 if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
104 return -EINVAL; /* phy name should be null-terminated */
107 phy = wpan_phy_find(name);
111 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
115 rc = ieee802154_nl_fill_phy(msg, info->snd_portid, info->snd_seq,
122 return genlmsg_reply(msg, info);
131 struct dump_phy_data {
133 struct netlink_callback *cb;
137 static int ieee802154_dump_phy_iter(struct wpan_phy *phy, void *_data)
140 struct dump_phy_data *data = _data;
142 pr_debug("%s\n", __func__);
144 if (data->idx++ < data->s_idx)
147 rc = ieee802154_nl_fill_phy(data->skb,
148 NETLINK_CB(data->cb->skb).portid,
149 data->cb->nlh->nlmsg_seq,
161 int ieee802154_dump_phy(struct sk_buff *skb, struct netlink_callback *cb)
163 struct dump_phy_data data = {
166 .s_idx = cb->args[0],
170 pr_debug("%s\n", __func__);
172 wpan_phy_for_each(ieee802154_dump_phy_iter, &data);
174 cb->args[0] = data.idx;
179 int ieee802154_add_iface(struct sk_buff *skb, struct genl_info *info)
182 struct wpan_phy *phy;
186 struct net_device *dev;
187 int type = __IEEE802154_DEV_INVALID;
189 pr_debug("%s\n", __func__);
191 if (!info->attrs[IEEE802154_ATTR_PHY_NAME])
194 name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
195 if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
196 return -EINVAL; /* phy name should be null-terminated */
198 if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
199 devname = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]);
200 if (devname[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1]
202 return -EINVAL; /* phy name should be null-terminated */
207 if (strlen(devname) >= IFNAMSIZ)
208 return -ENAMETOOLONG;
210 phy = wpan_phy_find(name);
214 msg = ieee802154_nl_new_reply(info, 0, IEEE802154_ADD_IFACE);
218 if (!phy->add_iface) {
220 goto nla_put_failure;
223 if (info->attrs[IEEE802154_ATTR_HW_ADDR] &&
224 nla_len(info->attrs[IEEE802154_ATTR_HW_ADDR]) !=
225 IEEE802154_ADDR_LEN) {
227 goto nla_put_failure;
230 if (info->attrs[IEEE802154_ATTR_DEV_TYPE]) {
231 type = nla_get_u8(info->attrs[IEEE802154_ATTR_DEV_TYPE]);
232 if (type >= __IEEE802154_DEV_MAX) {
234 goto nla_put_failure;
238 dev = phy->add_iface(phy, devname, type);
241 goto nla_put_failure;
244 if (info->attrs[IEEE802154_ATTR_HW_ADDR]) {
245 struct sockaddr addr;
247 addr.sa_family = ARPHRD_IEEE802154;
248 nla_memcpy(&addr.sa_data, info->attrs[IEEE802154_ATTR_HW_ADDR],
249 IEEE802154_ADDR_LEN);
252 * strangely enough, some callbacks (inetdev_event) from
253 * dev_set_mac_address require RTNL_LOCK
256 rc = dev_set_mac_address(dev, &addr);
262 if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
263 nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name))
264 goto nla_put_failure;
269 return ieee802154_nl_reply(msg, info);
272 rtnl_lock(); /* del_iface must be called with RTNL lock */
273 phy->del_iface(phy, dev);
283 int ieee802154_del_iface(struct sk_buff *skb, struct genl_info *info)
286 struct wpan_phy *phy;
289 struct net_device *dev;
291 pr_debug("%s\n", __func__);
293 if (!info->attrs[IEEE802154_ATTR_DEV_NAME])
296 name = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]);
297 if (name[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] != '\0')
298 return -EINVAL; /* name should be null-terminated */
300 dev = dev_get_by_name(genl_info_net(info), name);
304 phy = ieee802154_mlme_ops(dev)->get_phy(dev);
308 /* phy name is optional, but should be checked if it's given */
309 if (info->attrs[IEEE802154_ATTR_PHY_NAME]) {
310 struct wpan_phy *phy2;
313 nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
314 if (pname[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1]
316 /* name should be null-terminated */
319 phy2 = wpan_phy_find(pname);
331 msg = ieee802154_nl_new_reply(info, 0, IEEE802154_DEL_IFACE);
335 if (!phy->del_iface) {
337 goto nla_put_failure;
341 phy->del_iface(phy, dev);
343 /* We don't have device anymore */
349 if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
350 nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, name))
351 goto nla_put_failure;
354 return ieee802154_nl_reply(msg, info);
366 static int phy_set_txpower(struct wpan_phy *phy, struct genl_info *info)
368 int txpower = nla_get_s8(info->attrs[IEEE802154_ATTR_TXPOWER]);
371 rc = phy->set_txpower(phy, txpower);
375 phy->transmit_power = txpower;
380 static int phy_set_lbt(struct wpan_phy *phy, struct genl_info *info)
382 u8 on = !!nla_get_u8(info->attrs[IEEE802154_ATTR_LBT_ENABLED]);
385 rc = phy->set_lbt(phy, on);
394 static int phy_set_cca_mode(struct wpan_phy *phy, struct genl_info *info)
396 u8 mode = nla_get_u8(info->attrs[IEEE802154_ATTR_CCA_MODE]);
402 rc = phy->set_cca_mode(phy, mode);
406 phy->cca_mode = mode;
411 static int phy_set_cca_ed_level(struct wpan_phy *phy, struct genl_info *info)
413 s32 level = nla_get_s32(info->attrs[IEEE802154_ATTR_CCA_ED_LEVEL]);
416 rc = phy->set_cca_ed_level(phy, level);
420 phy->cca_ed_level = level;
425 static int phy_set_csma_params(struct wpan_phy *phy, struct genl_info *info)
428 u8 min_be = phy->min_be;
429 u8 max_be = phy->max_be;
430 u8 retries = phy->csma_retries;
432 if (info->attrs[IEEE802154_ATTR_CSMA_RETRIES])
433 retries = nla_get_u8(info->attrs[IEEE802154_ATTR_CSMA_RETRIES]);
434 if (info->attrs[IEEE802154_ATTR_CSMA_MIN_BE])
435 min_be = nla_get_u8(info->attrs[IEEE802154_ATTR_CSMA_MIN_BE]);
436 if (info->attrs[IEEE802154_ATTR_CSMA_MAX_BE])
437 max_be = nla_get_u8(info->attrs[IEEE802154_ATTR_CSMA_MAX_BE]);
439 if (retries > 5 || max_be < 3 || max_be > 8 || min_be > max_be)
442 rc = phy->set_csma_params(phy, min_be, max_be, retries);
446 phy->min_be = min_be;
447 phy->max_be = max_be;
448 phy->csma_retries = retries;
453 static int phy_set_frame_retries(struct wpan_phy *phy, struct genl_info *info)
455 s8 retries = nla_get_s8(info->attrs[IEEE802154_ATTR_FRAME_RETRIES]);
458 if (retries < -1 || retries > 7)
461 rc = phy->set_frame_retries(phy, retries);
465 phy->frame_retries = retries;
470 int ieee802154_set_phyparams(struct sk_buff *skb, struct genl_info *info)
472 struct wpan_phy *phy;
476 pr_debug("%s\n", __func__);
478 if (!info->attrs[IEEE802154_ATTR_PHY_NAME] &&
479 !info->attrs[IEEE802154_ATTR_LBT_ENABLED] &&
480 !info->attrs[IEEE802154_ATTR_CCA_MODE] &&
481 !info->attrs[IEEE802154_ATTR_CCA_ED_LEVEL] &&
482 !info->attrs[IEEE802154_ATTR_CSMA_RETRIES] &&
483 !info->attrs[IEEE802154_ATTR_CSMA_MIN_BE] &&
484 !info->attrs[IEEE802154_ATTR_CSMA_MAX_BE] &&
485 !info->attrs[IEEE802154_ATTR_FRAME_RETRIES])
488 name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
489 if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
490 return -EINVAL; /* phy name should be null-terminated */
492 phy = wpan_phy_find(name);
496 if ((!phy->set_txpower && info->attrs[IEEE802154_ATTR_TXPOWER]) ||
497 (!phy->set_lbt && info->attrs[IEEE802154_ATTR_LBT_ENABLED]) ||
498 (!phy->set_cca_mode && info->attrs[IEEE802154_ATTR_CCA_MODE]) ||
499 (!phy->set_cca_ed_level &&
500 info->attrs[IEEE802154_ATTR_CCA_ED_LEVEL]))
503 mutex_lock(&phy->pib_lock);
505 if (info->attrs[IEEE802154_ATTR_TXPOWER]) {
506 rc = phy_set_txpower(phy, info);
511 if (info->attrs[IEEE802154_ATTR_LBT_ENABLED]) {
512 rc = phy_set_lbt(phy, info);
517 if (info->attrs[IEEE802154_ATTR_CCA_MODE]) {
518 rc = phy_set_cca_mode(phy, info);
523 if (info->attrs[IEEE802154_ATTR_CCA_ED_LEVEL]) {
524 rc = phy_set_cca_ed_level(phy, info);
529 if (info->attrs[IEEE802154_ATTR_CSMA_RETRIES] ||
530 info->attrs[IEEE802154_ATTR_CSMA_MIN_BE] ||
531 info->attrs[IEEE802154_ATTR_CSMA_MAX_BE]) {
532 rc = phy_set_csma_params(phy, info);
537 if (info->attrs[IEEE802154_ATTR_FRAME_RETRIES]) {
538 rc = phy_set_frame_retries(phy, info);
543 mutex_unlock(&phy->pib_lock);
550 mutex_unlock(&phy->pib_lock);