net/ieee802154/nl802154.c

   1 /* This program is free software; you can redistribute it and/or modify
   2  * it under the terms of the GNU General Public License version 2
   3  * as published by the Free Software Foundation.
   4  *
   5  * This program is distributed in the hope that it will be useful,
   6  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   7  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   8  * GNU General Public License for more details.
   9  *
  10  * Authors:
  11  * Alexander Aring <aar@pengutronix.de>
  12  *
  13  * Based on: net/wireless/nl80211.c
  14  */
  15
  16 #include <linux/rtnetlink.h>
  17
  18 #include <net/cfg802154.h>
  19 #include <net/genetlink.h>
  20 #include <net/mac802154.h>
  21 #include <net/netlink.h>
  22 #include <net/nl802154.h>
  23 #include <net/sock.h>
  24
  25 #include "nl802154.h"
  26 #include "rdev-ops.h"
  27 #include "core.h"
  28
  29 /* the netlink family */
  30 static struct genl_family nl802154_fam;
  31
  32 /* multicast groups */
  33 enum nl802154_multicast_groups {
  34         NL802154_MCGRP_CONFIG,
  35 };
  36
  37 static const struct genl_multicast_group nl802154_mcgrps[] = {
  38         [NL802154_MCGRP_CONFIG] = { .name = "config", },
  39 };
  40
  41 /* returns ERR_PTR values */
  42 static struct wpan_dev *
  43 __cfg802154_wpan_dev_from_attrs(struct net *netns, struct nlattr **attrs)
  44 {
  45         struct cfg802154_registered_device *rdev;
  46         struct wpan_dev *result = NULL;
  47         bool have_ifidx = attrs[NL802154_ATTR_IFINDEX];
  48         bool have_wpan_dev_id = attrs[NL802154_ATTR_WPAN_DEV];
  49         u64 wpan_dev_id;
  50         int wpan_phy_idx = -1;
  51         int ifidx = -1;
  52
  53         ASSERT_RTNL();
  54
  55         if (!have_ifidx && !have_wpan_dev_id)
  56                 return ERR_PTR(-EINVAL);
  57
  58         if (have_ifidx)
  59                 ifidx = nla_get_u32(attrs[NL802154_ATTR_IFINDEX]);
  60         if (have_wpan_dev_id) {
  61                 wpan_dev_id = nla_get_u64(attrs[NL802154_ATTR_WPAN_DEV]);
  62                 wpan_phy_idx = wpan_dev_id >> 32;
  63         }
  64
  65         list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
  66                 struct wpan_dev *wpan_dev;
  67
  68                 if (wpan_phy_net(&rdev->wpan_phy) != netns)
  69                         continue;
  70
  71                 if (have_wpan_dev_id && rdev->wpan_phy_idx != wpan_phy_idx)
  72                         continue;
  73
  74                 list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
  75                         if (have_ifidx && wpan_dev->netdev &&
  76                             wpan_dev->netdev->ifindex == ifidx) {
  77                                 result = wpan_dev;
  78                                 break;
  79                         }
  80                         if (have_wpan_dev_id &&
  81                             wpan_dev->identifier == (u32)wpan_dev_id) {
  82                                 result = wpan_dev;
  83                                 break;
  84                         }
  85                 }
  86
  87                 if (result)
  88                         break;
  89         }
  90
  91         if (result)
  92                 return result;
  93
  94         return ERR_PTR(-ENODEV);
  95 }
  96
  97 static struct cfg802154_registered_device *
  98 __cfg802154_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
  99 {
 100         struct cfg802154_registered_device *rdev = NULL, *tmp;
 101         struct net_device *netdev;
 102
 103         ASSERT_RTNL();
 104
 105         if (!attrs[NL802154_ATTR_WPAN_PHY] &&
 106             !attrs[NL802154_ATTR_IFINDEX] &&
 107             !attrs[NL802154_ATTR_WPAN_DEV])
 108                 return ERR_PTR(-EINVAL);
 109
 110         if (attrs[NL802154_ATTR_WPAN_PHY])
 111                 rdev = cfg802154_rdev_by_wpan_phy_idx(
 112                                 nla_get_u32(attrs[NL802154_ATTR_WPAN_PHY]));
 113
 114         if (attrs[NL802154_ATTR_WPAN_DEV]) {
 115                 u64 wpan_dev_id = nla_get_u64(attrs[NL802154_ATTR_WPAN_DEV]);
 116                 struct wpan_dev *wpan_dev;
 117                 bool found = false;
 118
 119                 tmp = cfg802154_rdev_by_wpan_phy_idx(wpan_dev_id >> 32);
 120                 if (tmp) {
 121                         /* make sure wpan_dev exists */
 122                         list_for_each_entry(wpan_dev, &tmp->wpan_dev_list, list) {
 123                                 if (wpan_dev->identifier != (u32)wpan_dev_id)
 124                                         continue;
 125                                 found = true;
 126                                 break;
 127                         }
 128
 129                         if (!found)
 130                                 tmp = NULL;
 131
 132                         if (rdev && tmp != rdev)
 133                                 return ERR_PTR(-EINVAL);
 134                         rdev = tmp;
 135                 }
 136         }
 137
 138         if (attrs[NL802154_ATTR_IFINDEX]) {
 139                 int ifindex = nla_get_u32(attrs[NL802154_ATTR_IFINDEX]);
 140
 141                 netdev = __dev_get_by_index(netns, ifindex);
 142                 if (netdev) {
 143                         if (netdev->ieee802154_ptr)
 144                                 tmp = wpan_phy_to_rdev(
 145                                                 netdev->ieee802154_ptr->wpan_phy);
 146                         else
 147                                 tmp = NULL;
 148
 149                         /* not wireless device -- return error */
 150                         if (!tmp)
 151                                 return ERR_PTR(-EINVAL);
 152
 153                         /* mismatch -- return error */
 154                         if (rdev && tmp != rdev)
 155                                 return ERR_PTR(-EINVAL);
 156
 157                         rdev = tmp;
 158                 }
 159         }
 160
 161         if (!rdev)
 162                 return ERR_PTR(-ENODEV);
 163
 164         if (netns != wpan_phy_net(&rdev->wpan_phy))
 165                 return ERR_PTR(-ENODEV);
 166
 167         return rdev;
 168 }
 169
 170 /* This function returns a pointer to the driver
 171  * that the genl_info item that is passed refers to.
 172  *
 173  * The result of this can be a PTR_ERR and hence must
 174  * be checked with IS_ERR() for errors.
 175  */
 176 static struct cfg802154_registered_device *
 177 cfg802154_get_dev_from_info(struct net *netns, struct genl_info *info)
 178 {
 179         return __cfg802154_rdev_from_attrs(netns, info->attrs);
 180 }
 181
 182 /* policy for the attributes */
 183 static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
 184         [NL802154_ATTR_WPAN_PHY] = { .type = NLA_U32 },
 185         [NL802154_ATTR_WPAN_PHY_NAME] = { .type = NLA_NUL_STRING,
 186                                           .len = 20-1 },
 187
 188         [NL802154_ATTR_IFINDEX] = { .type = NLA_U32 },
 189         [NL802154_ATTR_IFTYPE] = { .type = NLA_U32 },
 190         [NL802154_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 191
 192         [NL802154_ATTR_WPAN_DEV] = { .type = NLA_U64 },
 193
 194         [NL802154_ATTR_PAGE] = { .type = NLA_U8, },
 195         [NL802154_ATTR_CHANNEL] = { .type = NLA_U8, },
 196
 197         [NL802154_ATTR_TX_POWER] = { .type = NLA_S32, },
 198
 199         [NL802154_ATTR_CCA_MODE] = { .type = NLA_U32, },
 200         [NL802154_ATTR_CCA_OPT] = { .type = NLA_U32, },
 201         [NL802154_ATTR_CCA_ED_LEVEL] = { .type = NLA_S32, },
 202
 203         [NL802154_ATTR_SUPPORTED_CHANNEL] = { .type = NLA_U32, },
 204
 205         [NL802154_ATTR_PAN_ID] = { .type = NLA_U16, },
 206         [NL802154_ATTR_EXTENDED_ADDR] = { .type = NLA_U64 },
 207         [NL802154_ATTR_SHORT_ADDR] = { .type = NLA_U16, },
 208
 209         [NL802154_ATTR_MIN_BE] = { .type = NLA_U8, },
 210         [NL802154_ATTR_MAX_BE] = { .type = NLA_U8, },
 211         [NL802154_ATTR_MAX_CSMA_BACKOFFS] = { .type = NLA_U8, },
 212
 213         [NL802154_ATTR_MAX_FRAME_RETRIES] = { .type = NLA_S8, },
 214
 215         [NL802154_ATTR_LBT_MODE] = { .type = NLA_U8, },
 216
 217         [NL802154_ATTR_WPAN_PHY_CAPS] = { .type = NLA_NESTED },
 218
 219         [NL802154_ATTR_SUPPORTED_COMMANDS] = { .type = NLA_NESTED },
 220
 221         [NL802154_ATTR_ACKREQ_DEFAULT] = { .type = NLA_U8 },
 222
 223         [NL802154_ATTR_PID] = { .type = NLA_U32 },
 224         [NL802154_ATTR_NETNS_FD] = { .type = NLA_U32 },
 225 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
 226         [NL802154_ATTR_SEC_ENABLED] = { .type = NLA_U8, },
 227         [NL802154_ATTR_SEC_OUT_LEVEL] = { .type = NLA_U32, },
 228         [NL802154_ATTR_SEC_OUT_KEY_ID] = { .type = NLA_NESTED, },
 229         [NL802154_ATTR_SEC_FRAME_COUNTER] = { .type = NLA_U32 },
 230
 231         [NL802154_ATTR_SEC_LEVEL] = { .type = NLA_NESTED },
 232         [NL802154_ATTR_SEC_DEVICE] = { .type = NLA_NESTED },
 233         [NL802154_ATTR_SEC_DEVKEY] = { .type = NLA_NESTED },
 234         [NL802154_ATTR_SEC_KEY] = { .type = NLA_NESTED },
 235 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
 236 };
 237
 238 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
 239 static int
 240 nl802154_prepare_wpan_dev_dump(struct sk_buff *skb,
 241                                struct netlink_callback *cb,
 242                                struct cfg802154_registered_device **rdev,
 243                                struct wpan_dev **wpan_dev)
 244 {
 245         int err;
 246
 247         rtnl_lock();
 248
 249         if (!cb->args[0]) {
 250                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl802154_fam.hdrsize,
 251                                   genl_family_attrbuf(&nl802154_fam),
 252                                   nl802154_fam.maxattr, nl802154_policy, NULL);
 253                 if (err)
 254                         goto out_unlock;
 255
 256                 *wpan_dev = __cfg802154_wpan_dev_from_attrs(sock_net(skb->sk),
 257                                                             genl_family_attrbuf(&nl802154_fam));
 258                 if (IS_ERR(*wpan_dev)) {
 259                         err = PTR_ERR(*wpan_dev);
 260                         goto out_unlock;
 261                 }
 262                 *rdev = wpan_phy_to_rdev((*wpan_dev)->wpan_phy);
 263                 /* 0 is the first index - add 1 to parse only once */
 264                 cb->args[0] = (*rdev)->wpan_phy_idx + 1;
 265                 cb->args[1] = (*wpan_dev)->identifier;
 266         } else {
 267                 /* subtract the 1 again here */
 268                 struct wpan_phy *wpan_phy = wpan_phy_idx_to_wpan_phy(cb->args[0] - 1);
 269                 struct wpan_dev *tmp;
 270
 271                 if (!wpan_phy) {
 272                         err = -ENODEV;
 273                         goto out_unlock;
 274                 }
 275                 *rdev = wpan_phy_to_rdev(wpan_phy);
 276                 *wpan_dev = NULL;
 277
 278                 list_for_each_entry(tmp, &(*rdev)->wpan_dev_list, list) {
 279                         if (tmp->identifier == cb->args[1]) {
 280                                 *wpan_dev = tmp;
 281                                 break;
 282                         }
 283                 }
 284
 285                 if (!*wpan_dev) {
 286                         err = -ENODEV;
 287                         goto out_unlock;
 288                 }
 289         }
 290
 291         return 0;
 292  out_unlock:
 293         rtnl_unlock();
 294         return err;
 295 }
 296
 297 static void
 298 nl802154_finish_wpan_dev_dump(struct cfg802154_registered_device *rdev)
 299 {
 300         rtnl_unlock();
 301 }
 302 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
 303
 304 /* message building helper */
 305 static inline void *nl802154hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 306                                     int flags, u8 cmd)
 307 {
 308         /* since there is no private header just add the generic one */
 309         return genlmsg_put(skb, portid, seq, &nl802154_fam, flags, cmd);
 310 }
 311
 312 static int
 313 nl802154_put_flags(struct sk_buff *msg, int attr, u32 mask)
 314 {
 315         struct nlattr *nl_flags = nla_nest_start(msg, attr);
 316         int i;
 317
 318         if (!nl_flags)
 319                 return -ENOBUFS;
 320
 321         i = 0;
 322         while (mask) {
 323                 if ((mask & 1) && nla_put_flag(msg, i))
 324                         return -ENOBUFS;
 325
 326                 mask >>= 1;
 327                 i++;
 328         }
 329
 330         nla_nest_end(msg, nl_flags);
 331         return 0;
 332 }
 333
 334 static int
 335 nl802154_send_wpan_phy_channels(struct cfg802154_registered_device *rdev,
 336                                 struct sk_buff *msg)
 337 {
 338         struct nlattr *nl_page;
 339         unsigned long page;
 340
 341         nl_page = nla_nest_start(msg, NL802154_ATTR_CHANNELS_SUPPORTED);
 342         if (!nl_page)
 343                 return -ENOBUFS;
 344
 345         for (page = 0; page <= IEEE802154_MAX_PAGE; page++) {
 346                 if (nla_put_u32(msg, NL802154_ATTR_SUPPORTED_CHANNEL,
 347                                 rdev->wpan_phy.supported.channels[page]))
 348                         return -ENOBUFS;
 349         }
 350         nla_nest_end(msg, nl_page);
 351
 352         return 0;
 353 }
 354
 355 static int
 356 nl802154_put_capabilities(struct sk_buff *msg,
 357                           struct cfg802154_registered_device *rdev)
 358 {
 359         const struct wpan_phy_supported *caps = &rdev->wpan_phy.supported;
 360         struct nlattr *nl_caps, *nl_channels;
 361         int i;
 362
 363         nl_caps = nla_nest_start(msg, NL802154_ATTR_WPAN_PHY_CAPS);
 364         if (!nl_caps)
 365                 return -ENOBUFS;
 366
 367         nl_channels = nla_nest_start(msg, NL802154_CAP_ATTR_CHANNELS);
 368         if (!nl_channels)
 369                 return -ENOBUFS;
 370
 371         for (i = 0; i <= IEEE802154_MAX_PAGE; i++) {
 372                 if (caps->channels[i]) {
 373                         if (nl802154_put_flags(msg, i, caps->channels[i]))
 374                                 return -ENOBUFS;
 375                 }
 376         }
 377
 378         nla_nest_end(msg, nl_channels);
 379
 380         if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL) {
 381                 struct nlattr *nl_ed_lvls;
 382
 383                 nl_ed_lvls = nla_nest_start(msg,
 384                                             NL802154_CAP_ATTR_CCA_ED_LEVELS);
 385                 if (!nl_ed_lvls)
 386                         return -ENOBUFS;
 387
 388                 for (i = 0; i < caps->cca_ed_levels_size; i++) {
 389                         if (nla_put_s32(msg, i, caps->cca_ed_levels[i]))
 390                                 return -ENOBUFS;
 391                 }
 392
 393                 nla_nest_end(msg, nl_ed_lvls);
 394         }
 395
 396         if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER) {
 397                 struct nlattr *nl_tx_pwrs;
 398
 399                 nl_tx_pwrs = nla_nest_start(msg, NL802154_CAP_ATTR_TX_POWERS);
 400                 if (!nl_tx_pwrs)
 401                         return -ENOBUFS;
 402
 403                 for (i = 0; i < caps->tx_powers_size; i++) {
 404                         if (nla_put_s32(msg, i, caps->tx_powers[i]))
 405                                 return -ENOBUFS;
 406                 }
 407
 408                 nla_nest_end(msg, nl_tx_pwrs);
 409         }
 410
 411         if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE) {
 412                 if (nl802154_put_flags(msg, NL802154_CAP_ATTR_CCA_MODES,
 413                                        caps->cca_modes) ||
 414                     nl802154_put_flags(msg, NL802154_CAP_ATTR_CCA_OPTS,
 415                                        caps->cca_opts))
 416                         return -ENOBUFS;
 417         }
 418
 419         if (nla_put_u8(msg, NL802154_CAP_ATTR_MIN_MINBE, caps->min_minbe) ||
 420             nla_put_u8(msg, NL802154_CAP_ATTR_MAX_MINBE, caps->max_minbe) ||
 421             nla_put_u8(msg, NL802154_CAP_ATTR_MIN_MAXBE, caps->min_maxbe) ||
 422             nla_put_u8(msg, NL802154_CAP_ATTR_MAX_MAXBE, caps->max_maxbe) ||
 423             nla_put_u8(msg, NL802154_CAP_ATTR_MIN_CSMA_BACKOFFS,
 424                        caps->min_csma_backoffs) ||
 425             nla_put_u8(msg, NL802154_CAP_ATTR_MAX_CSMA_BACKOFFS,
 426                        caps->max_csma_backoffs) ||
 427             nla_put_s8(msg, NL802154_CAP_ATTR_MIN_FRAME_RETRIES,
 428                        caps->min_frame_retries) ||
 429             nla_put_s8(msg, NL802154_CAP_ATTR_MAX_FRAME_RETRIES,
 430                        caps->max_frame_retries) ||
 431             nl802154_put_flags(msg, NL802154_CAP_ATTR_IFTYPES,
 432                                caps->iftypes) ||
 433             nla_put_u32(msg, NL802154_CAP_ATTR_LBT, caps->lbt))
 434                 return -ENOBUFS;
 435
 436         nla_nest_end(msg, nl_caps);
 437
 438         return 0;
 439 }
 440
 441 static int nl802154_send_wpan_phy(struct cfg802154_registered_device *rdev,
 442                                   enum nl802154_commands cmd,
 443                                   struct sk_buff *msg, u32 portid, u32 seq,
 444                                   int flags)
 445 {
 446         struct nlattr *nl_cmds;
 447         void *hdr;
 448         int i;
 449
 450         hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
 451         if (!hdr)
 452                 return -ENOBUFS;
 453
 454         if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx) ||
 455             nla_put_string(msg, NL802154_ATTR_WPAN_PHY_NAME,
 456                            wpan_phy_name(&rdev->wpan_phy)) ||
 457             nla_put_u32(msg, NL802154_ATTR_GENERATION,
 458                         cfg802154_rdev_list_generation))
 459                 goto nla_put_failure;
 460
 461         if (cmd != NL802154_CMD_NEW_WPAN_PHY)
 462                 goto finish;
 463
 464         /* DUMP PHY PIB */
 465
 466         /* current channel settings */
 467         if (nla_put_u8(msg, NL802154_ATTR_PAGE,
 468                        rdev->wpan_phy.current_page) ||
 469             nla_put_u8(msg, NL802154_ATTR_CHANNEL,
 470                        rdev->wpan_phy.current_channel))
 471                 goto nla_put_failure;
 472
 473         /* TODO remove this behaviour, we still keep support it for a while
 474          * so users can change the behaviour to the new one.
 475          */
 476         if (nl802154_send_wpan_phy_channels(rdev, msg))
 477                 goto nla_put_failure;
 478
 479         /* cca mode */
 480         if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE) {
 481                 if (nla_put_u32(msg, NL802154_ATTR_CCA_MODE,
 482                                 rdev->wpan_phy.cca.mode))
 483                         goto nla_put_failure;
 484
 485                 if (rdev->wpan_phy.cca.mode == NL802154_CCA_ENERGY_CARRIER) {
 486                         if (nla_put_u32(msg, NL802154_ATTR_CCA_OPT,
 487                                         rdev->wpan_phy.cca.opt))
 488                                 goto nla_put_failure;
 489                 }
 490         }
 491
 492         if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER) {
 493                 if (nla_put_s32(msg, NL802154_ATTR_TX_POWER,
 494                                 rdev->wpan_phy.transmit_power))
 495                         goto nla_put_failure;
 496         }
 497
 498         if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL) {
 499                 if (nla_put_s32(msg, NL802154_ATTR_CCA_ED_LEVEL,
 500                                 rdev->wpan_phy.cca_ed_level))
 501                         goto nla_put_failure;
 502         }
 503
 504         if (nl802154_put_capabilities(msg, rdev))
 505                 goto nla_put_failure;
 506
 507         nl_cmds = nla_nest_start(msg, NL802154_ATTR_SUPPORTED_COMMANDS);
 508         if (!nl_cmds)
 509                 goto nla_put_failure;
 510
 511         i = 0;
 512 #define CMD(op, n)                                                      \
 513         do {                                                            \
 514                 if (rdev->ops->op) {                                    \
 515                         i++;                                            \
 516                         if (nla_put_u32(msg, i, NL802154_CMD_ ## n))    \
 517                                 goto nla_put_failure;                   \
 518                 }                                                       \
 519         } while (0)
 520
 521         CMD(add_virtual_intf, NEW_INTERFACE);
 522         CMD(del_virtual_intf, DEL_INTERFACE);
 523         CMD(set_channel, SET_CHANNEL);
 524         CMD(set_pan_id, SET_PAN_ID);
 525         CMD(set_short_addr, SET_SHORT_ADDR);
 526         CMD(set_backoff_exponent, SET_BACKOFF_EXPONENT);
 527         CMD(set_max_csma_backoffs, SET_MAX_CSMA_BACKOFFS);
 528         CMD(set_max_frame_retries, SET_MAX_FRAME_RETRIES);
 529         CMD(set_lbt_mode, SET_LBT_MODE);
 530         CMD(set_ackreq_default, SET_ACKREQ_DEFAULT);
 531
 532         if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER)
 533                 CMD(set_tx_power, SET_TX_POWER);
 534
 535         if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL)
 536                 CMD(set_cca_ed_level, SET_CCA_ED_LEVEL);
 537
 538         if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE)
 539                 CMD(set_cca_mode, SET_CCA_MODE);
 540
 541 #undef CMD
 542         nla_nest_end(msg, nl_cmds);
 543
 544 finish:
 545         genlmsg_end(msg, hdr);
 546         return 0;
 547
 548 nla_put_failure:
 549         genlmsg_cancel(msg, hdr);
 550         return -EMSGSIZE;
 551 }
 552
 553 struct nl802154_dump_wpan_phy_state {
 554         s64 filter_wpan_phy;
 555         long start;
 556
 557 };
 558
 559 static int nl802154_dump_wpan_phy_parse(struct sk_buff *skb,
 560                                         struct netlink_callback *cb,
 561                                         struct nl802154_dump_wpan_phy_state *state)
 562 {
 563         struct nlattr **tb = genl_family_attrbuf(&nl802154_fam);
 564         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl802154_fam.hdrsize, tb,
 565                               nl802154_fam.maxattr, nl802154_policy, NULL);
 566
 567         /* TODO check if we can handle error here,
 568          * we have no backward compatibility
 569          */
 570         if (ret)
 571                 return 0;
 572
 573         if (tb[NL802154_ATTR_WPAN_PHY])
 574                 state->filter_wpan_phy = nla_get_u32(tb[NL802154_ATTR_WPAN_PHY]);
 575         if (tb[NL802154_ATTR_WPAN_DEV])
 576                 state->filter_wpan_phy = nla_get_u64(tb[NL802154_ATTR_WPAN_DEV]) >> 32;
 577         if (tb[NL802154_ATTR_IFINDEX]) {
 578                 struct net_device *netdev;
 579                 struct cfg802154_registered_device *rdev;
 580                 int ifidx = nla_get_u32(tb[NL802154_ATTR_IFINDEX]);
 581
 582                 netdev = __dev_get_by_index(&init_net, ifidx);
 583                 if (!netdev)
 584                         return -ENODEV;
 585                 if (netdev->ieee802154_ptr) {
 586                         rdev = wpan_phy_to_rdev(
 587                                         netdev->ieee802154_ptr->wpan_phy);
 588                         state->filter_wpan_phy = rdev->wpan_phy_idx;
 589                 }
 590         }
 591
 592         return 0;
 593 }
 594
 595 static int
 596 nl802154_dump_wpan_phy(struct sk_buff *skb, struct netlink_callback *cb)
 597 {
 598         int idx = 0, ret;
 599         struct nl802154_dump_wpan_phy_state *state = (void *)cb->args[0];
 600         struct cfg802154_registered_device *rdev;
 601
 602         rtnl_lock();
 603         if (!state) {
 604                 state = kzalloc(sizeof(*state), GFP_KERNEL);
 605                 if (!state) {
 606                         rtnl_unlock();
 607                         return -ENOMEM;
 608                 }
 609                 state->filter_wpan_phy = -1;
 610                 ret = nl802154_dump_wpan_phy_parse(skb, cb, state);
 611                 if (ret) {
 612                         kfree(state);
 613                         rtnl_unlock();
 614                         return ret;
 615                 }
 616                 cb->args[0] = (long)state;
 617         }
 618
 619         list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
 620                 if (!net_eq(wpan_phy_net(&rdev->wpan_phy), sock_net(skb->sk)))
 621                         continue;
 622                 if (++idx <= state->start)
 623                         continue;
 624                 if (state->filter_wpan_phy != -1 &&
 625                     state->filter_wpan_phy != rdev->wpan_phy_idx)
 626                         continue;
 627                 /* attempt to fit multiple wpan_phy data chunks into the skb */
 628                 ret = nl802154_send_wpan_phy(rdev,
 629                                              NL802154_CMD_NEW_WPAN_PHY,
 630                                              skb,
 631                                              NETLINK_CB(cb->skb).portid,
 632                                              cb->nlh->nlmsg_seq, NLM_F_MULTI);
 633                 if (ret < 0) {
 634                         if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
 635                             !skb->len && cb->min_dump_alloc < 4096) {
 636                                 cb->min_dump_alloc = 4096;
 637                                 rtnl_unlock();
 638                                 return 1;
 639                         }
 640                         idx--;
 641                         break;
 642                 }
 643                 break;
 644         }
 645         rtnl_unlock();
 646
 647         state->start = idx;
 648
 649         return skb->len;
 650 }
 651
 652 static int nl802154_dump_wpan_phy_done(struct netlink_callback *cb)
 653 {
 654         kfree((void *)cb->args[0]);
 655         return 0;
 656 }
 657
 658 static int nl802154_get_wpan_phy(struct sk_buff *skb, struct genl_info *info)
 659 {
 660         struct sk_buff *msg;
 661         struct cfg802154_registered_device *rdev = info->user_ptr[0];
 662
 663         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 664         if (!msg)
 665                 return -ENOMEM;
 666
 667         if (nl802154_send_wpan_phy(rdev, NL802154_CMD_NEW_WPAN_PHY, msg,
 668                                    info->snd_portid, info->snd_seq, 0) < 0) {
 669                 nlmsg_free(msg);
 670                 return -ENOBUFS;
 671         }
 672
 673         return genlmsg_reply(msg, info);
 674 }
 675
 676 static inline u64 wpan_dev_id(struct wpan_dev *wpan_dev)
 677 {
 678         return (u64)wpan_dev->identifier |
 679                ((u64)wpan_phy_to_rdev(wpan_dev->wpan_phy)->wpan_phy_idx << 32);
 680 }
 681
 682 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
 683 #include <net/ieee802154_netdev.h>
 684
 685 static int
 686 ieee802154_llsec_send_key_id(struct sk_buff *msg,
 687                              const struct ieee802154_llsec_key_id *desc)
 688 {
 689         struct nlattr *nl_dev_addr;
 690
 691         if (nla_put_u32(msg, NL802154_KEY_ID_ATTR_MODE, desc->mode))
 692                 return -ENOBUFS;
 693
 694         switch (desc->mode) {
 695         case NL802154_KEY_ID_MODE_IMPLICIT:
 696                 nl_dev_addr = nla_nest_start(msg, NL802154_KEY_ID_ATTR_IMPLICIT);
 697                 if (!nl_dev_addr)
 698                         return -ENOBUFS;
 699
 700                 if (nla_put_le16(msg, NL802154_DEV_ADDR_ATTR_PAN_ID,
 701                                  desc->device_addr.pan_id) ||
 702                     nla_put_u32(msg,  NL802154_DEV_ADDR_ATTR_MODE,
 703                                 desc->device_addr.mode))
 704                         return -ENOBUFS;
 705
 706                 switch (desc->device_addr.mode) {
 707                 case NL802154_DEV_ADDR_SHORT:
 708                         if (nla_put_le16(msg, NL802154_DEV_ADDR_ATTR_SHORT,
 709                                          desc->device_addr.short_addr))
 710                                 return -ENOBUFS;
 711                         break;
 712                 case NL802154_DEV_ADDR_EXTENDED:
 713                         if (nla_put_le64(msg, NL802154_DEV_ADDR_ATTR_EXTENDED,
 714                                          desc->device_addr.extended_addr,
 715                                          NL802154_DEV_ADDR_ATTR_PAD))
 716                                 return -ENOBUFS;
 717                         break;
 718                 default:
 719                         /* userspace should handle unknown */
 720                         break;
 721                 }
 722
 723                 nla_nest_end(msg, nl_dev_addr);
 724                 break;
 725         case NL802154_KEY_ID_MODE_INDEX:
 726                 break;
 727         case NL802154_KEY_ID_MODE_INDEX_SHORT:
 728                 /* TODO renmae short_source? */
 729                 if (nla_put_le32(msg, NL802154_KEY_ID_ATTR_SOURCE_SHORT,
 730                                  desc->short_source))
 731                         return -ENOBUFS;
 732                 break;
 733         case NL802154_KEY_ID_MODE_INDEX_EXTENDED:
 734                 if (nla_put_le64(msg, NL802154_KEY_ID_ATTR_SOURCE_EXTENDED,
 735                                  desc->extended_source,
 736                                  NL802154_KEY_ID_ATTR_PAD))
 737                         return -ENOBUFS;
 738                 break;
 739         default:
 740                 /* userspace should handle unknown */
 741                 break;
 742         }
 743
 744         /* TODO key_id to key_idx ? Check naming */
 745         if (desc->mode != NL802154_KEY_ID_MODE_IMPLICIT) {
 746                 if (nla_put_u8(msg, NL802154_KEY_ID_ATTR_INDEX, desc->id))
 747                         return -ENOBUFS;
 748         }
 749
 750         return 0;
 751 }
 752
 753 static int nl802154_get_llsec_params(struct sk_buff *msg,
 754                                      struct cfg802154_registered_device *rdev,
 755                                      struct wpan_dev *wpan_dev)
 756 {
 757         struct nlattr *nl_key_id;
 758         struct ieee802154_llsec_params params;
 759         int ret;
 760
 761         ret = rdev_get_llsec_params(rdev, wpan_dev, &params);
 762         if (ret < 0)
 763                 return ret;
 764
 765         if (nla_put_u8(msg, NL802154_ATTR_SEC_ENABLED, params.enabled) ||
 766             nla_put_u32(msg, NL802154_ATTR_SEC_OUT_LEVEL, params.out_level) ||
 767             nla_put_be32(msg, NL802154_ATTR_SEC_FRAME_COUNTER,
 768                          params.frame_counter))
 769                 return -ENOBUFS;
 770
 771         nl_key_id = nla_nest_start(msg, NL802154_ATTR_SEC_OUT_KEY_ID);
 772         if (!nl_key_id)
 773                 return -ENOBUFS;
 774
 775         ret = ieee802154_llsec_send_key_id(msg, &params.out_key);
 776         if (ret < 0)
 777                 return ret;
 778
 779         nla_nest_end(msg, nl_key_id);
 780
 781         return 0;
 782 }
 783 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
 784
 785 static int
 786 nl802154_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 787                     struct cfg802154_registered_device *rdev,
 788                     struct wpan_dev *wpan_dev)
 789 {
 790         struct net_device *dev = wpan_dev->netdev;
 791         void *hdr;
 792
 793         hdr = nl802154hdr_put(msg, portid, seq, flags,
 794                               NL802154_CMD_NEW_INTERFACE);
 795         if (!hdr)
 796                 return -1;
 797
 798         if (dev &&
 799             (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex) ||
 800              nla_put_string(msg, NL802154_ATTR_IFNAME, dev->name)))
 801                 goto nla_put_failure;
 802
 803         if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx) ||
 804             nla_put_u32(msg, NL802154_ATTR_IFTYPE, wpan_dev->iftype) ||
 805             nla_put_u64_64bit(msg, NL802154_ATTR_WPAN_DEV,
 806                               wpan_dev_id(wpan_dev), NL802154_ATTR_PAD) ||
 807             nla_put_u32(msg, NL802154_ATTR_GENERATION,
 808                         rdev->devlist_generation ^
 809                         (cfg802154_rdev_list_generation << 2)))
 810                 goto nla_put_failure;
 811
 812         /* address settings */
 813         if (nla_put_le64(msg, NL802154_ATTR_EXTENDED_ADDR,
 814                          wpan_dev->extended_addr,
 815                          NL802154_ATTR_PAD) ||
 816             nla_put_le16(msg, NL802154_ATTR_SHORT_ADDR,
 817                          wpan_dev->short_addr) ||
 818             nla_put_le16(msg, NL802154_ATTR_PAN_ID, wpan_dev->pan_id))
 819                 goto nla_put_failure;
 820
 821         /* ARET handling */
 822         if (nla_put_s8(msg, NL802154_ATTR_MAX_FRAME_RETRIES,
 823                        wpan_dev->frame_retries) ||
 824             nla_put_u8(msg, NL802154_ATTR_MAX_BE, wpan_dev->max_be) ||
 825             nla_put_u8(msg, NL802154_ATTR_MAX_CSMA_BACKOFFS,
 826                        wpan_dev->csma_retries) ||
 827             nla_put_u8(msg, NL802154_ATTR_MIN_BE, wpan_dev->min_be))
 828                 goto nla_put_failure;
 829
 830         /* listen before transmit */
 831         if (nla_put_u8(msg, NL802154_ATTR_LBT_MODE, wpan_dev->lbt))
 832                 goto nla_put_failure;
 833
 834         /* ackreq default behaviour */
 835         if (nla_put_u8(msg, NL802154_ATTR_ACKREQ_DEFAULT, wpan_dev->ackreq))
 836                 goto nla_put_failure;
 837
 838 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
 839         if (nl802154_get_llsec_params(msg, rdev, wpan_dev) < 0)
 840                 goto nla_put_failure;
 841 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
 842
 843         genlmsg_end(msg, hdr);
 844         return 0;
 845
 846 nla_put_failure:
 847         genlmsg_cancel(msg, hdr);
 848         return -EMSGSIZE;
 849 }
 850
 851 static int
 852 nl802154_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
 853 {
 854         int wp_idx = 0;
 855         int if_idx = 0;
 856         int wp_start = cb->args[0];
 857         int if_start = cb->args[1];
 858         struct cfg802154_registered_device *rdev;
 859         struct wpan_dev *wpan_dev;
 860
 861         rtnl_lock();
 862         list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
 863                 if (!net_eq(wpan_phy_net(&rdev->wpan_phy), sock_net(skb->sk)))
 864                         continue;
 865                 if (wp_idx < wp_start) {
 866                         wp_idx++;
 867                         continue;
 868                 }
 869                 if_idx = 0;
 870
 871                 list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
 872                         if (if_idx < if_start) {
 873                                 if_idx++;
 874                                 continue;
 875                         }
 876                         if (nl802154_send_iface(skb, NETLINK_CB(cb->skb).portid,
 877                                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
 878                                                 rdev, wpan_dev) < 0) {
 879                                 goto out;
 880                         }
 881                         if_idx++;
 882                 }
 883
 884                 wp_idx++;
 885         }
 886 out:
 887         rtnl_unlock();
 888
 889         cb->args[0] = wp_idx;
 890         cb->args[1] = if_idx;
 891
 892         return skb->len;
 893 }
 894
 895 static int nl802154_get_interface(struct sk_buff *skb, struct genl_info *info)
 896 {
 897         struct sk_buff *msg;
 898         struct cfg802154_registered_device *rdev = info->user_ptr[0];
 899         struct wpan_dev *wdev = info->user_ptr[1];
 900
 901         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 902         if (!msg)
 903                 return -ENOMEM;
 904
 905         if (nl802154_send_iface(msg, info->snd_portid, info->snd_seq, 0,
 906                                 rdev, wdev) < 0) {
 907                 nlmsg_free(msg);
 908                 return -ENOBUFS;
 909         }
 910
 911         return genlmsg_reply(msg, info);
 912 }
 913
 914 static int nl802154_new_interface(struct sk_buff *skb, struct genl_info *info)
 915 {
 916         struct cfg802154_registered_device *rdev = info->user_ptr[0];
 917         enum nl802154_iftype type = NL802154_IFTYPE_UNSPEC;
 918         __le64 extended_addr = cpu_to_le64(0x0000000000000000ULL);
 919
 920         /* TODO avoid failing a new interface
 921          * creation due to pending removal?
 922          */
 923
 924         if (!info->attrs[NL802154_ATTR_IFNAME])
 925                 return -EINVAL;
 926
 927         if (info->attrs[NL802154_ATTR_IFTYPE]) {
 928                 type = nla_get_u32(info->attrs[NL802154_ATTR_IFTYPE]);
 929                 if (type > NL802154_IFTYPE_MAX ||
 930                     !(rdev->wpan_phy.supported.iftypes & BIT(type)))
 931                         return -EINVAL;
 932         }
 933
 934         if (info->attrs[NL802154_ATTR_EXTENDED_ADDR])
 935                 extended_addr = nla_get_le64(info->attrs[NL802154_ATTR_EXTENDED_ADDR]);
 936
 937         if (!rdev->ops->add_virtual_intf)
 938                 return -EOPNOTSUPP;
 939
 940         return rdev_add_virtual_intf(rdev,
 941                                      nla_data(info->attrs[NL802154_ATTR_IFNAME]),
 942                                      NET_NAME_USER, type, extended_addr);
 943 }
 944
 945 static int nl802154_del_interface(struct sk_buff *skb, struct genl_info *info)
 946 {
 947         struct cfg802154_registered_device *rdev = info->user_ptr[0];
 948         struct wpan_dev *wpan_dev = info->user_ptr[1];
 949
 950         if (!rdev->ops->del_virtual_intf)
 951                 return -EOPNOTSUPP;
 952
 953         /* If we remove a wpan device without a netdev then clear
 954          * user_ptr[1] so that nl802154_post_doit won't dereference it
 955          * to check if it needs to do dev_put(). Otherwise it crashes
 956          * since the wpan_dev has been freed, unlike with a netdev where
 957          * we need the dev_put() for the netdev to really be freed.
 958          */
 959         if (!wpan_dev->netdev)
 960                 info->user_ptr[1] = NULL;
 961
 962         return rdev_del_virtual_intf(rdev, wpan_dev);
 963 }
 964
 965 static int nl802154_set_channel(struct sk_buff *skb, struct genl_info *info)
 966 {
 967         struct cfg802154_registered_device *rdev = info->user_ptr[0];
 968         u8 channel, page;
 969
 970         if (!info->attrs[NL802154_ATTR_PAGE] ||
 971             !info->attrs[NL802154_ATTR_CHANNEL])
 972                 return -EINVAL;
 973
 974         page = nla_get_u8(info->attrs[NL802154_ATTR_PAGE]);
 975         channel = nla_get_u8(info->attrs[NL802154_ATTR_CHANNEL]);
 976
 977         /* check 802.15.4 constraints */
 978         if (page > IEEE802154_MAX_PAGE || channel > IEEE802154_MAX_CHANNEL ||
 979             !(rdev->wpan_phy.supported.channels[page] & BIT(channel)))
 980                 return -EINVAL;
 981
 982         return rdev_set_channel(rdev, page, channel);
 983 }
 984
 985 static int nl802154_set_cca_mode(struct sk_buff *skb, struct genl_info *info)
 986 {
 987         struct cfg802154_registered_device *rdev = info->user_ptr[0];
 988         struct wpan_phy_cca cca;
 989
 990         if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE))
 991                 return -EOPNOTSUPP;
 992
 993         if (!info->attrs[NL802154_ATTR_CCA_MODE])
 994                 return -EINVAL;
 995
 996         cca.mode = nla_get_u32(info->attrs[NL802154_ATTR_CCA_MODE]);
 997         /* checking 802.15.4 constraints */
 998         if (cca.mode < NL802154_CCA_ENERGY ||
 999             cca.mode > NL802154_CCA_ATTR_MAX ||
1000             !(rdev->wpan_phy.supported.cca_modes & BIT(cca.mode)))
1001                 return -EINVAL;
1002
1003         if (cca.mode == NL802154_CCA_ENERGY_CARRIER) {
1004                 if (!info->attrs[NL802154_ATTR_CCA_OPT])
1005                         return -EINVAL;
1006
1007                 cca.opt = nla_get_u32(info->attrs[NL802154_ATTR_CCA_OPT]);
1008                 if (cca.opt > NL802154_CCA_OPT_ATTR_MAX ||
1009                     !(rdev->wpan_phy.supported.cca_opts & BIT(cca.opt)))
1010                         return -EINVAL;
1011         }
1012
1013         return rdev_set_cca_mode(rdev, &cca);
1014 }
1015
1016 static int nl802154_set_cca_ed_level(struct sk_buff *skb, struct genl_info *info)
1017 {
1018         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1019         s32 ed_level;
1020         int i;
1021
1022         if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL))
1023                 return -EOPNOTSUPP;
1024
1025         if (!info->attrs[NL802154_ATTR_CCA_ED_LEVEL])
1026                 return -EINVAL;
1027
1028         ed_level = nla_get_s32(info->attrs[NL802154_ATTR_CCA_ED_LEVEL]);
1029
1030         for (i = 0; i < rdev->wpan_phy.supported.cca_ed_levels_size; i++) {
1031                 if (ed_level == rdev->wpan_phy.supported.cca_ed_levels[i])
1032                         return rdev_set_cca_ed_level(rdev, ed_level);
1033         }
1034
1035         return -EINVAL;
1036 }
1037
1038 static int nl802154_set_tx_power(struct sk_buff *skb, struct genl_info *info)
1039 {
1040         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1041         s32 power;
1042         int i;
1043
1044         if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER))
1045                 return -EOPNOTSUPP;
1046
1047         if (!info->attrs[NL802154_ATTR_TX_POWER])
1048                 return -EINVAL;
1049
1050         power = nla_get_s32(info->attrs[NL802154_ATTR_TX_POWER]);
1051
1052         for (i = 0; i < rdev->wpan_phy.supported.tx_powers_size; i++) {
1053                 if (power == rdev->wpan_phy.supported.tx_powers[i])
1054                         return rdev_set_tx_power(rdev, power);
1055         }
1056
1057         return -EINVAL;
1058 }
1059
1060 static int nl802154_set_pan_id(struct sk_buff *skb, struct genl_info *info)
1061 {
1062         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1063         struct net_device *dev = info->user_ptr[1];
1064         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1065         __le16 pan_id;
1066
1067         /* conflict here while tx/rx calls */
1068         if (netif_running(dev))
1069                 return -EBUSY;
1070
1071         if (wpan_dev->lowpan_dev) {
1072                 if (netif_running(wpan_dev->lowpan_dev))
1073                         return -EBUSY;
1074         }
1075
1076         /* don't change address fields on monitor */
1077         if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
1078             !info->attrs[NL802154_ATTR_PAN_ID])
1079                 return -EINVAL;
1080
1081         pan_id = nla_get_le16(info->attrs[NL802154_ATTR_PAN_ID]);
1082
1083         /* TODO
1084          * I am not sure about to check here on broadcast pan_id.
1085          * Broadcast is a valid setting, comment from 802.15.4:
1086          * If this value is 0xffff, the device is not associated.
1087          *
1088          * This could useful to simple deassociate an device.
1089          */
1090         if (pan_id == cpu_to_le16(IEEE802154_PAN_ID_BROADCAST))
1091                 return -EINVAL;
1092
1093         return rdev_set_pan_id(rdev, wpan_dev, pan_id);
1094 }
1095
1096 static int nl802154_set_short_addr(struct sk_buff *skb, struct genl_info *info)
1097 {
1098         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1099         struct net_device *dev = info->user_ptr[1];
1100         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1101         __le16 short_addr;
1102
1103         /* conflict here while tx/rx calls */
1104         if (netif_running(dev))
1105                 return -EBUSY;
1106
1107         if (wpan_dev->lowpan_dev) {
1108                 if (netif_running(wpan_dev->lowpan_dev))
1109                         return -EBUSY;
1110         }
1111
1112         /* don't change address fields on monitor */
1113         if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
1114             !info->attrs[NL802154_ATTR_SHORT_ADDR])
1115                 return -EINVAL;
1116
1117         short_addr = nla_get_le16(info->attrs[NL802154_ATTR_SHORT_ADDR]);
1118
1119         /* TODO
1120          * I am not sure about to check here on broadcast short_addr.
1121          * Broadcast is a valid setting, comment from 802.15.4:
1122          * A value of 0xfffe indicates that the device has
1123          * associated but has not been allocated an address. A
1124          * value of 0xffff indicates that the device does not
1125          * have a short address.
1126          *
1127          * I think we should allow to set these settings but
1128          * don't allow to allow socket communication with it.
1129          */
1130         if (short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC) ||
1131             short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST))
1132                 return -EINVAL;
1133
1134         return rdev_set_short_addr(rdev, wpan_dev, short_addr);
1135 }
1136
1137 static int
1138 nl802154_set_backoff_exponent(struct sk_buff *skb, struct genl_info *info)
1139 {
1140         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1141         struct net_device *dev = info->user_ptr[1];
1142         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1143         u8 min_be, max_be;
1144
1145         /* should be set on netif open inside phy settings */
1146         if (netif_running(dev))
1147                 return -EBUSY;
1148
1149         if (!info->attrs[NL802154_ATTR_MIN_BE] ||
1150             !info->attrs[NL802154_ATTR_MAX_BE])
1151                 return -EINVAL;
1152
1153         min_be = nla_get_u8(info->attrs[NL802154_ATTR_MIN_BE]);
1154         max_be = nla_get_u8(info->attrs[NL802154_ATTR_MAX_BE]);
1155
1156         /* check 802.15.4 constraints */
1157         if (min_be < rdev->wpan_phy.supported.min_minbe ||
1158             min_be > rdev->wpan_phy.supported.max_minbe ||
1159             max_be < rdev->wpan_phy.supported.min_maxbe ||
1160             max_be > rdev->wpan_phy.supported.max_maxbe ||
1161             min_be > max_be)
1162                 return -EINVAL;
1163
1164         return rdev_set_backoff_exponent(rdev, wpan_dev, min_be, max_be);
1165 }
1166
1167 static int
1168 nl802154_set_max_csma_backoffs(struct sk_buff *skb, struct genl_info *info)
1169 {
1170         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1171         struct net_device *dev = info->user_ptr[1];
1172         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1173         u8 max_csma_backoffs;
1174
1175         /* conflict here while other running iface settings */
1176         if (netif_running(dev))
1177                 return -EBUSY;
1178
1179         if (!info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS])
1180                 return -EINVAL;
1181
1182         max_csma_backoffs = nla_get_u8(
1183                         info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS]);
1184
1185         /* check 802.15.4 constraints */
1186         if (max_csma_backoffs < rdev->wpan_phy.supported.min_csma_backoffs ||
1187             max_csma_backoffs > rdev->wpan_phy.supported.max_csma_backoffs)
1188                 return -EINVAL;
1189
1190         return rdev_set_max_csma_backoffs(rdev, wpan_dev, max_csma_backoffs);
1191 }
1192
1193 static int
1194 nl802154_set_max_frame_retries(struct sk_buff *skb, struct genl_info *info)
1195 {
1196         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1197         struct net_device *dev = info->user_ptr[1];
1198         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1199         s8 max_frame_retries;
1200
1201         if (netif_running(dev))
1202                 return -EBUSY;
1203
1204         if (!info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES])
1205                 return -EINVAL;
1206
1207         max_frame_retries = nla_get_s8(
1208                         info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES]);
1209
1210         /* check 802.15.4 constraints */
1211         if (max_frame_retries < rdev->wpan_phy.supported.min_frame_retries ||
1212             max_frame_retries > rdev->wpan_phy.supported.max_frame_retries)
1213                 return -EINVAL;
1214
1215         return rdev_set_max_frame_retries(rdev, wpan_dev, max_frame_retries);
1216 }
1217
1218 static int nl802154_set_lbt_mode(struct sk_buff *skb, struct genl_info *info)
1219 {
1220         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1221         struct net_device *dev = info->user_ptr[1];
1222         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1223         int mode;
1224
1225         if (netif_running(dev))
1226                 return -EBUSY;
1227
1228         if (!info->attrs[NL802154_ATTR_LBT_MODE])
1229                 return -EINVAL;
1230
1231         mode = nla_get_u8(info->attrs[NL802154_ATTR_LBT_MODE]);
1232
1233         if (mode != 0 && mode != 1)
1234                 return -EINVAL;
1235
1236         if (!wpan_phy_supported_bool(mode, rdev->wpan_phy.supported.lbt))
1237                 return -EINVAL;
1238
1239         return rdev_set_lbt_mode(rdev, wpan_dev, mode);
1240 }
1241
1242 static int
1243 nl802154_set_ackreq_default(struct sk_buff *skb, struct genl_info *info)
1244 {
1245         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1246         struct net_device *dev = info->user_ptr[1];
1247         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1248         int ackreq;
1249
1250         if (netif_running(dev))
1251                 return -EBUSY;
1252
1253         if (!info->attrs[NL802154_ATTR_ACKREQ_DEFAULT])
1254                 return -EINVAL;
1255
1256         ackreq = nla_get_u8(info->attrs[NL802154_ATTR_ACKREQ_DEFAULT]);
1257
1258         if (ackreq != 0 && ackreq != 1)
1259                 return -EINVAL;
1260
1261         return rdev_set_ackreq_default(rdev, wpan_dev, ackreq);
1262 }
1263
1264 static int nl802154_wpan_phy_netns(struct sk_buff *skb, struct genl_info *info)
1265 {
1266         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1267         struct net *net;
1268         int err;
1269
1270         if (info->attrs[NL802154_ATTR_PID]) {
1271                 u32 pid = nla_get_u32(info->attrs[NL802154_ATTR_PID]);
1272
1273                 net = get_net_ns_by_pid(pid);
1274         } else if (info->attrs[NL802154_ATTR_NETNS_FD]) {
1275                 u32 fd = nla_get_u32(info->attrs[NL802154_ATTR_NETNS_FD]);
1276
1277                 net = get_net_ns_by_fd(fd);
1278         } else {
1279                 return -EINVAL;
1280         }
1281
1282         if (IS_ERR(net))
1283                 return PTR_ERR(net);
1284
1285         err = 0;
1286
1287         /* check if anything to do */
1288         if (!net_eq(wpan_phy_net(&rdev->wpan_phy), net))
1289                 err = cfg802154_switch_netns(rdev, net);
1290
1291         put_net(net);
1292         return err;
1293 }
1294
1295 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
1296 static const struct nla_policy nl802154_dev_addr_policy[NL802154_DEV_ADDR_ATTR_MAX + 1] = {
1297         [NL802154_DEV_ADDR_ATTR_PAN_ID] = { .type = NLA_U16 },
1298         [NL802154_DEV_ADDR_ATTR_MODE] = { .type = NLA_U32 },
1299         [NL802154_DEV_ADDR_ATTR_SHORT] = { .type = NLA_U16 },
1300         [NL802154_DEV_ADDR_ATTR_EXTENDED] = { .type = NLA_U64 },
1301 };
1302
1303 static int
1304 ieee802154_llsec_parse_dev_addr(struct nlattr *nla,
1305                                 struct ieee802154_addr *addr)
1306 {
1307         struct nlattr *attrs[NL802154_DEV_ADDR_ATTR_MAX + 1];
1308
1309         if (!nla || nla_parse_nested(attrs, NL802154_DEV_ADDR_ATTR_MAX, nla,
1310                                      nl802154_dev_addr_policy, NULL))
1311                 return -EINVAL;
1312
1313         if (!attrs[NL802154_DEV_ADDR_ATTR_PAN_ID] ||
1314             !attrs[NL802154_DEV_ADDR_ATTR_MODE] ||
1315             !(attrs[NL802154_DEV_ADDR_ATTR_SHORT] ||
1316               attrs[NL802154_DEV_ADDR_ATTR_EXTENDED]))
1317                 return -EINVAL;
1318
1319         addr->pan_id = nla_get_le16(attrs[NL802154_DEV_ADDR_ATTR_PAN_ID]);
1320         addr->mode = nla_get_u32(attrs[NL802154_DEV_ADDR_ATTR_MODE]);
1321         switch (addr->mode) {
1322         case NL802154_DEV_ADDR_SHORT:
1323                 addr->short_addr = nla_get_le16(attrs[NL802154_DEV_ADDR_ATTR_SHORT]);
1324                 break;
1325         case NL802154_DEV_ADDR_EXTENDED:
1326                 addr->extended_addr = nla_get_le64(attrs[NL802154_DEV_ADDR_ATTR_EXTENDED]);
1327                 break;
1328         default:
1329                 return -EINVAL;
1330         }
1331
1332         return 0;
1333 }
1334
1335 static const struct nla_policy nl802154_key_id_policy[NL802154_KEY_ID_ATTR_MAX + 1] = {
1336         [NL802154_KEY_ID_ATTR_MODE] = { .type = NLA_U32 },
1337         [NL802154_KEY_ID_ATTR_INDEX] = { .type = NLA_U8 },
1338         [NL802154_KEY_ID_ATTR_IMPLICIT] = { .type = NLA_NESTED },
1339         [NL802154_KEY_ID_ATTR_SOURCE_SHORT] = { .type = NLA_U32 },
1340         [NL802154_KEY_ID_ATTR_SOURCE_EXTENDED] = { .type = NLA_U64 },
1341 };
1342
1343 static int
1344 ieee802154_llsec_parse_key_id(struct nlattr *nla,
1345                               struct ieee802154_llsec_key_id *desc)
1346 {
1347         struct nlattr *attrs[NL802154_KEY_ID_ATTR_MAX + 1];
1348
1349         if (!nla || nla_parse_nested(attrs, NL802154_KEY_ID_ATTR_MAX, nla,
1350                                      nl802154_key_id_policy, NULL))
1351                 return -EINVAL;
1352
1353         if (!attrs[NL802154_KEY_ID_ATTR_MODE])
1354                 return -EINVAL;
1355
1356         desc->mode = nla_get_u32(attrs[NL802154_KEY_ID_ATTR_MODE]);
1357         switch (desc->mode) {
1358         case NL802154_KEY_ID_MODE_IMPLICIT:
1359                 if (!attrs[NL802154_KEY_ID_ATTR_IMPLICIT])
1360                         return -EINVAL;
1361
1362                 if (ieee802154_llsec_parse_dev_addr(attrs[NL802154_KEY_ID_ATTR_IMPLICIT],
1363                                                     &desc->device_addr) < 0)
1364                         return -EINVAL;
1365                 break;
1366         case NL802154_KEY_ID_MODE_INDEX:
1367                 break;
1368         case NL802154_KEY_ID_MODE_INDEX_SHORT:
1369                 if (!attrs[NL802154_KEY_ID_ATTR_SOURCE_SHORT])
1370                         return -EINVAL;
1371
1372                 desc->short_source = nla_get_le32(attrs[NL802154_KEY_ID_ATTR_SOURCE_SHORT]);
1373                 break;
1374         case NL802154_KEY_ID_MODE_INDEX_EXTENDED:
1375                 if (!attrs[NL802154_KEY_ID_ATTR_SOURCE_EXTENDED])
1376                         return -EINVAL;
1377
1378                 desc->extended_source = nla_get_le64(attrs[NL802154_KEY_ID_ATTR_SOURCE_EXTENDED]);
1379                 break;
1380         default:
1381                 return -EINVAL;
1382         }
1383
1384         if (desc->mode != NL802154_KEY_ID_MODE_IMPLICIT) {
1385                 if (!attrs[NL802154_KEY_ID_ATTR_INDEX])
1386                         return -EINVAL;
1387
1388                 /* TODO change id to idx */
1389                 desc->id = nla_get_u8(attrs[NL802154_KEY_ID_ATTR_INDEX]);
1390         }
1391
1392         return 0;
1393 }
1394
1395 static int nl802154_set_llsec_params(struct sk_buff *skb,
1396                                      struct genl_info *info)
1397 {
1398         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1399         struct net_device *dev = info->user_ptr[1];
1400         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1401         struct ieee802154_llsec_params params;
1402         u32 changed = 0;
1403         int ret;
1404
1405         if (info->attrs[NL802154_ATTR_SEC_ENABLED]) {
1406                 u8 enabled;
1407
1408                 enabled = nla_get_u8(info->attrs[NL802154_ATTR_SEC_ENABLED]);
1409                 if (enabled != 0 && enabled != 1)
1410                         return -EINVAL;
1411
1412                 params.enabled = nla_get_u8(info->attrs[NL802154_ATTR_SEC_ENABLED]);
1413                 changed |= IEEE802154_LLSEC_PARAM_ENABLED;
1414         }
1415
1416         if (info->attrs[NL802154_ATTR_SEC_OUT_KEY_ID]) {
1417                 ret = ieee802154_llsec_parse_key_id(info->attrs[NL802154_ATTR_SEC_OUT_KEY_ID],
1418                                                     &params.out_key);
1419                 if (ret < 0)
1420                         return ret;
1421
1422                 changed |= IEEE802154_LLSEC_PARAM_OUT_KEY;
1423         }
1424
1425         if (info->attrs[NL802154_ATTR_SEC_OUT_LEVEL]) {
1426                 params.out_level = nla_get_u32(info->attrs[NL802154_ATTR_SEC_OUT_LEVEL]);
1427                 if (params.out_level > NL802154_SECLEVEL_MAX)
1428                         return -EINVAL;
1429
1430                 changed |= IEEE802154_LLSEC_PARAM_OUT_LEVEL;
1431         }
1432
1433         if (info->attrs[NL802154_ATTR_SEC_FRAME_COUNTER]) {
1434                 params.frame_counter = nla_get_be32(info->attrs[NL802154_ATTR_SEC_FRAME_COUNTER]);
1435                 changed |= IEEE802154_LLSEC_PARAM_FRAME_COUNTER;
1436         }
1437
1438         return rdev_set_llsec_params(rdev, wpan_dev, &params, changed);
1439 }
1440
1441 static int nl802154_send_key(struct sk_buff *msg, u32 cmd, u32 portid,
1442                              u32 seq, int flags,
1443                              struct cfg802154_registered_device *rdev,
1444                              struct net_device *dev,
1445                              const struct ieee802154_llsec_key_entry *key)
1446 {
1447         void *hdr;
1448         u32 commands[NL802154_CMD_FRAME_NR_IDS / 32];
1449         struct nlattr *nl_key, *nl_key_id;
1450
1451         hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1452         if (!hdr)
1453                 return -1;
1454
1455         if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1456                 goto nla_put_failure;
1457
1458         nl_key = nla_nest_start(msg, NL802154_ATTR_SEC_KEY);
1459         if (!nl_key)
1460                 goto nla_put_failure;
1461
1462         nl_key_id = nla_nest_start(msg, NL802154_KEY_ATTR_ID);
1463         if (!nl_key_id)
1464                 goto nla_put_failure;
1465
1466         if (ieee802154_llsec_send_key_id(msg, &key->id) < 0)
1467                 goto nla_put_failure;
1468
1469         nla_nest_end(msg, nl_key_id);
1470
1471         if (nla_put_u8(msg, NL802154_KEY_ATTR_USAGE_FRAMES,
1472                        key->key->frame_types))
1473                 goto nla_put_failure;
1474
1475         if (key->key->frame_types & BIT(NL802154_FRAME_CMD)) {
1476                 /* TODO for each nested */
1477                 memset(commands, 0, sizeof(commands));
1478                 commands[7] = key->key->cmd_frame_ids;
1479                 if (nla_put(msg, NL802154_KEY_ATTR_USAGE_CMDS,
1480                             sizeof(commands), commands))
1481                         goto nla_put_failure;
1482         }
1483
1484         if (nla_put(msg, NL802154_KEY_ATTR_BYTES, NL802154_KEY_SIZE,
1485                     key->key->key))
1486                 goto nla_put_failure;
1487
1488         nla_nest_end(msg, nl_key);
1489         genlmsg_end(msg, hdr);
1490
1491         return 0;
1492
1493 nla_put_failure:
1494         genlmsg_cancel(msg, hdr);
1495         return -EMSGSIZE;
1496 }
1497
1498 static int
1499 nl802154_dump_llsec_key(struct sk_buff *skb, struct netlink_callback *cb)
1500 {
1501         struct cfg802154_registered_device *rdev = NULL;
1502         struct ieee802154_llsec_key_entry *key;
1503         struct ieee802154_llsec_table *table;
1504         struct wpan_dev *wpan_dev;
1505         int err;
1506
1507         err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
1508         if (err)
1509                 return err;
1510
1511         if (!wpan_dev->netdev) {
1512                 err = -EINVAL;
1513                 goto out_err;
1514         }
1515
1516         rdev_lock_llsec_table(rdev, wpan_dev);
1517         rdev_get_llsec_table(rdev, wpan_dev, &table);
1518
1519         /* TODO make it like station dump */
1520         if (cb->args[2])
1521                 goto out;
1522
1523         list_for_each_entry(key, &table->keys, list) {
1524                 if (nl802154_send_key(skb, NL802154_CMD_NEW_SEC_KEY,
1525                                       NETLINK_CB(cb->skb).portid,
1526                                       cb->nlh->nlmsg_seq, NLM_F_MULTI,
1527                                       rdev, wpan_dev->netdev, key) < 0) {
1528                         /* TODO */
1529                         err = -EIO;
1530                         rdev_unlock_llsec_table(rdev, wpan_dev);
1531                         goto out_err;
1532                 }
1533         }
1534
1535         cb->args[2] = 1;
1536
1537 out:
1538         rdev_unlock_llsec_table(rdev, wpan_dev);
1539         err = skb->len;
1540 out_err:
1541         nl802154_finish_wpan_dev_dump(rdev);
1542
1543         return err;
1544 }
1545
1546 static const struct nla_policy nl802154_key_policy[NL802154_KEY_ATTR_MAX + 1] = {
1547         [NL802154_KEY_ATTR_ID] = { NLA_NESTED },
1548         /* TODO handle it as for_each_nested and NLA_FLAG? */
1549         [NL802154_KEY_ATTR_USAGE_FRAMES] = { NLA_U8 },
1550         /* TODO handle it as for_each_nested, not static array? */
1551         [NL802154_KEY_ATTR_USAGE_CMDS] = { .len = NL802154_CMD_FRAME_NR_IDS / 8 },
1552         [NL802154_KEY_ATTR_BYTES] = { .len = NL802154_KEY_SIZE },
1553 };
1554
1555 static int nl802154_add_llsec_key(struct sk_buff *skb, struct genl_info *info)
1556 {
1557         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1558         struct net_device *dev = info->user_ptr[1];
1559         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1560         struct nlattr *attrs[NL802154_KEY_ATTR_MAX + 1];
1561         struct ieee802154_llsec_key key = { };
1562         struct ieee802154_llsec_key_id id = { };
1563         u32 commands[NL802154_CMD_FRAME_NR_IDS / 32] = { };
1564
1565         if (nla_parse_nested(attrs, NL802154_KEY_ATTR_MAX,
1566                              info->attrs[NL802154_ATTR_SEC_KEY],
1567                              nl802154_key_policy, info->extack))
1568                 return -EINVAL;
1569
1570         if (!attrs[NL802154_KEY_ATTR_USAGE_FRAMES] ||
1571             !attrs[NL802154_KEY_ATTR_BYTES])
1572                 return -EINVAL;
1573
1574         if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
1575                 return -ENOBUFS;
1576
1577         key.frame_types = nla_get_u8(attrs[NL802154_KEY_ATTR_USAGE_FRAMES]);
1578         if (key.frame_types > BIT(NL802154_FRAME_MAX) ||
1579             ((key.frame_types & BIT(NL802154_FRAME_CMD)) &&
1580              !attrs[NL802154_KEY_ATTR_USAGE_CMDS]))
1581                 return -EINVAL;
1582
1583         if (attrs[NL802154_KEY_ATTR_USAGE_CMDS]) {
1584                 /* TODO for each nested */
1585                 nla_memcpy(commands, attrs[NL802154_KEY_ATTR_USAGE_CMDS],
1586                            NL802154_CMD_FRAME_NR_IDS / 8);
1587
1588                 /* TODO understand the -EINVAL logic here? last condition */
1589                 if (commands[0] || commands[1] || commands[2] || commands[3] ||
1590                     commands[4] || commands[5] || commands[6] ||
1591                     commands[7] > BIT(NL802154_CMD_FRAME_MAX))
1592                         return -EINVAL;
1593
1594                 key.cmd_frame_ids = commands[7];
1595         } else {
1596                 key.cmd_frame_ids = 0;
1597         }
1598
1599         nla_memcpy(key.key, attrs[NL802154_KEY_ATTR_BYTES], NL802154_KEY_SIZE);
1600
1601         if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
1602                 return -ENOBUFS;
1603
1604         return rdev_add_llsec_key(rdev, wpan_dev, &id, &key);
1605 }
1606
1607 static int nl802154_del_llsec_key(struct sk_buff *skb, struct genl_info *info)
1608 {
1609         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1610         struct net_device *dev = info->user_ptr[1];
1611         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1612         struct nlattr *attrs[NL802154_KEY_ATTR_MAX + 1];
1613         struct ieee802154_llsec_key_id id;
1614
1615         if (nla_parse_nested(attrs, NL802154_KEY_ATTR_MAX,
1616                              info->attrs[NL802154_ATTR_SEC_KEY],
1617                              nl802154_key_policy, info->extack))
1618                 return -EINVAL;
1619
1620         if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
1621                 return -ENOBUFS;
1622
1623         return rdev_del_llsec_key(rdev, wpan_dev, &id);
1624 }
1625
1626 static int nl802154_send_device(struct sk_buff *msg, u32 cmd, u32 portid,
1627                                 u32 seq, int flags,
1628                                 struct cfg802154_registered_device *rdev,
1629                                 struct net_device *dev,
1630                                 const struct ieee802154_llsec_device *dev_desc)
1631 {
1632         void *hdr;
1633         struct nlattr *nl_device;
1634
1635         hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1636         if (!hdr)
1637                 return -1;
1638
1639         if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1640                 goto nla_put_failure;
1641
1642         nl_device = nla_nest_start(msg, NL802154_ATTR_SEC_DEVICE);
1643         if (!nl_device)
1644                 goto nla_put_failure;
1645
1646         if (nla_put_u32(msg, NL802154_DEV_ATTR_FRAME_COUNTER,
1647                         dev_desc->frame_counter) ||
1648             nla_put_le16(msg, NL802154_DEV_ATTR_PAN_ID, dev_desc->pan_id) ||
1649             nla_put_le16(msg, NL802154_DEV_ATTR_SHORT_ADDR,
1650                          dev_desc->short_addr) ||
1651             nla_put_le64(msg, NL802154_DEV_ATTR_EXTENDED_ADDR,
1652                          dev_desc->hwaddr, NL802154_DEV_ATTR_PAD) ||
1653             nla_put_u8(msg, NL802154_DEV_ATTR_SECLEVEL_EXEMPT,
1654                        dev_desc->seclevel_exempt) ||
1655             nla_put_u32(msg, NL802154_DEV_ATTR_KEY_MODE, dev_desc->key_mode))
1656                 goto nla_put_failure;
1657
1658         nla_nest_end(msg, nl_device);
1659         genlmsg_end(msg, hdr);
1660
1661         return 0;
1662
1663 nla_put_failure:
1664         genlmsg_cancel(msg, hdr);
1665         return -EMSGSIZE;
1666 }
1667
1668 static int
1669 nl802154_dump_llsec_dev(struct sk_buff *skb, struct netlink_callback *cb)
1670 {
1671         struct cfg802154_registered_device *rdev = NULL;
1672         struct ieee802154_llsec_device *dev;
1673         struct ieee802154_llsec_table *table;
1674         struct wpan_dev *wpan_dev;
1675         int err;
1676
1677         err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
1678         if (err)
1679                 return err;
1680
1681         if (!wpan_dev->netdev) {
1682                 err = -EINVAL;
1683                 goto out_err;
1684         }
1685
1686         rdev_lock_llsec_table(rdev, wpan_dev);
1687         rdev_get_llsec_table(rdev, wpan_dev, &table);
1688
1689         /* TODO make it like station dump */
1690         if (cb->args[2])
1691                 goto out;
1692
1693         list_for_each_entry(dev, &table->devices, list) {
1694                 if (nl802154_send_device(skb, NL802154_CMD_NEW_SEC_LEVEL,
1695                                          NETLINK_CB(cb->skb).portid,
1696                                          cb->nlh->nlmsg_seq, NLM_F_MULTI,
1697                                          rdev, wpan_dev->netdev, dev) < 0) {
1698                         /* TODO */
1699                         err = -EIO;
1700                         rdev_unlock_llsec_table(rdev, wpan_dev);
1701                         goto out_err;
1702                 }
1703         }
1704
1705         cb->args[2] = 1;
1706
1707 out:
1708         rdev_unlock_llsec_table(rdev, wpan_dev);
1709         err = skb->len;
1710 out_err:
1711         nl802154_finish_wpan_dev_dump(rdev);
1712
1713         return err;
1714 }
1715
1716 static const struct nla_policy nl802154_dev_policy[NL802154_DEV_ATTR_MAX + 1] = {
1717         [NL802154_DEV_ATTR_FRAME_COUNTER] = { NLA_U32 },
1718         [NL802154_DEV_ATTR_PAN_ID] = { .type = NLA_U16 },
1719         [NL802154_DEV_ATTR_SHORT_ADDR] = { .type = NLA_U16 },
1720         [NL802154_DEV_ATTR_EXTENDED_ADDR] = { .type = NLA_U64 },
1721         [NL802154_DEV_ATTR_SECLEVEL_EXEMPT] = { NLA_U8 },
1722         [NL802154_DEV_ATTR_KEY_MODE] = { NLA_U32 },
1723 };
1724
1725 static int
1726 ieee802154_llsec_parse_device(struct nlattr *nla,
1727                               struct ieee802154_llsec_device *dev)
1728 {
1729         struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1];
1730
1731         if (!nla || nla_parse_nested(attrs, NL802154_DEV_ATTR_MAX,
1732                                      nla, nl802154_dev_policy, NULL))
1733                 return -EINVAL;
1734
1735         memset(dev, 0, sizeof(*dev));
1736
1737         if (!attrs[NL802154_DEV_ATTR_FRAME_COUNTER] ||
1738             !attrs[NL802154_DEV_ATTR_PAN_ID] ||
1739             !attrs[NL802154_DEV_ATTR_SHORT_ADDR] ||
1740             !attrs[NL802154_DEV_ATTR_EXTENDED_ADDR] ||
1741             !attrs[NL802154_DEV_ATTR_SECLEVEL_EXEMPT] ||
1742             !attrs[NL802154_DEV_ATTR_KEY_MODE])
1743                 return -EINVAL;
1744
1745         /* TODO be32 */
1746         dev->frame_counter = nla_get_u32(attrs[NL802154_DEV_ATTR_FRAME_COUNTER]);
1747         dev->pan_id = nla_get_le16(attrs[NL802154_DEV_ATTR_PAN_ID]);
1748         dev->short_addr = nla_get_le16(attrs[NL802154_DEV_ATTR_SHORT_ADDR]);
1749         /* TODO rename hwaddr to extended_addr */
1750         dev->hwaddr = nla_get_le64(attrs[NL802154_DEV_ATTR_EXTENDED_ADDR]);
1751         dev->seclevel_exempt = nla_get_u8(attrs[NL802154_DEV_ATTR_SECLEVEL_EXEMPT]);
1752         dev->key_mode = nla_get_u32(attrs[NL802154_DEV_ATTR_KEY_MODE]);
1753
1754         if (dev->key_mode > NL802154_DEVKEY_MAX ||
1755             (dev->seclevel_exempt != 0 && dev->seclevel_exempt != 1))
1756                 return -EINVAL;
1757
1758         return 0;
1759 }
1760
1761 static int nl802154_add_llsec_dev(struct sk_buff *skb, struct genl_info *info)
1762 {
1763         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1764         struct net_device *dev = info->user_ptr[1];
1765         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1766         struct ieee802154_llsec_device dev_desc;
1767
1768         if (ieee802154_llsec_parse_device(info->attrs[NL802154_ATTR_SEC_DEVICE],
1769                                           &dev_desc) < 0)
1770                 return -EINVAL;
1771
1772         return rdev_add_device(rdev, wpan_dev, &dev_desc);
1773 }
1774
1775 static int nl802154_del_llsec_dev(struct sk_buff *skb, struct genl_info *info)
1776 {
1777         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1778         struct net_device *dev = info->user_ptr[1];
1779         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1780         struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1];
1781         __le64 extended_addr;
1782
1783         if (nla_parse_nested(attrs, NL802154_DEV_ATTR_MAX,
1784                              info->attrs[NL802154_ATTR_SEC_DEVICE],
1785                              nl802154_dev_policy, info->extack))
1786                 return -EINVAL;
1787
1788         if (!attrs[NL802154_DEV_ATTR_EXTENDED_ADDR])
1789                 return -EINVAL;
1790
1791         extended_addr = nla_get_le64(attrs[NL802154_DEV_ATTR_EXTENDED_ADDR]);
1792         return rdev_del_device(rdev, wpan_dev, extended_addr);
1793 }
1794
1795 static int nl802154_send_devkey(struct sk_buff *msg, u32 cmd, u32 portid,
1796                                 u32 seq, int flags,
1797                                 struct cfg802154_registered_device *rdev,
1798                                 struct net_device *dev, __le64 extended_addr,
1799                                 const struct ieee802154_llsec_device_key *devkey)
1800 {
1801         void *hdr;
1802         struct nlattr *nl_devkey, *nl_key_id;
1803
1804         hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1805         if (!hdr)
1806                 return -1;
1807
1808         if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1809                 goto nla_put_failure;
1810
1811         nl_devkey = nla_nest_start(msg, NL802154_ATTR_SEC_DEVKEY);
1812         if (!nl_devkey)
1813                 goto nla_put_failure;
1814
1815         if (nla_put_le64(msg, NL802154_DEVKEY_ATTR_EXTENDED_ADDR,
1816                          extended_addr, NL802154_DEVKEY_ATTR_PAD) ||
1817             nla_put_u32(msg, NL802154_DEVKEY_ATTR_FRAME_COUNTER,
1818                         devkey->frame_counter))
1819                 goto nla_put_failure;
1820
1821         nl_key_id = nla_nest_start(msg, NL802154_DEVKEY_ATTR_ID);
1822         if (!nl_key_id)
1823                 goto nla_put_failure;
1824
1825         if (ieee802154_llsec_send_key_id(msg, &devkey->key_id) < 0)
1826                 goto nla_put_failure;
1827
1828         nla_nest_end(msg, nl_key_id);
1829         nla_nest_end(msg, nl_devkey);
1830         genlmsg_end(msg, hdr);
1831
1832         return 0;
1833
1834 nla_put_failure:
1835         genlmsg_cancel(msg, hdr);
1836         return -EMSGSIZE;
1837 }
1838
1839 static int
1840 nl802154_dump_llsec_devkey(struct sk_buff *skb, struct netlink_callback *cb)
1841 {
1842         struct cfg802154_registered_device *rdev = NULL;
1843         struct ieee802154_llsec_device_key *kpos;
1844         struct ieee802154_llsec_device *dpos;
1845         struct ieee802154_llsec_table *table;
1846         struct wpan_dev *wpan_dev;
1847         int err;
1848
1849         err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
1850         if (err)
1851                 return err;
1852
1853         if (!wpan_dev->netdev) {
1854                 err = -EINVAL;
1855                 goto out_err;
1856         }
1857
1858         rdev_lock_llsec_table(rdev, wpan_dev);
1859         rdev_get_llsec_table(rdev, wpan_dev, &table);
1860
1861         /* TODO make it like station dump */
1862         if (cb->args[2])
1863                 goto out;
1864
1865         /* TODO look if remove devkey and do some nested attribute */
1866         list_for_each_entry(dpos, &table->devices, list) {
1867                 list_for_each_entry(kpos, &dpos->keys, list) {
1868                         if (nl802154_send_devkey(skb,
1869                                                  NL802154_CMD_NEW_SEC_LEVEL,
1870                                                  NETLINK_CB(cb->skb).portid,
1871                                                  cb->nlh->nlmsg_seq,
1872                                                  NLM_F_MULTI, rdev,
1873                                                  wpan_dev->netdev,
1874                                                  dpos->hwaddr,
1875                                                  kpos) < 0) {
1876                                 /* TODO */
1877                                 err = -EIO;
1878                                 rdev_unlock_llsec_table(rdev, wpan_dev);
1879                                 goto out_err;
1880                         }
1881                 }
1882         }
1883
1884         cb->args[2] = 1;
1885
1886 out:
1887         rdev_unlock_llsec_table(rdev, wpan_dev);
1888         err = skb->len;
1889 out_err:
1890         nl802154_finish_wpan_dev_dump(rdev);
1891
1892         return err;
1893 }
1894
1895 static const struct nla_policy nl802154_devkey_policy[NL802154_DEVKEY_ATTR_MAX + 1] = {
1896         [NL802154_DEVKEY_ATTR_FRAME_COUNTER] = { NLA_U32 },
1897         [NL802154_DEVKEY_ATTR_EXTENDED_ADDR] = { NLA_U64 },
1898         [NL802154_DEVKEY_ATTR_ID] = { NLA_NESTED },
1899 };
1900
1901 static int nl802154_add_llsec_devkey(struct sk_buff *skb, struct genl_info *info)
1902 {
1903         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1904         struct net_device *dev = info->user_ptr[1];
1905         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1906         struct nlattr *attrs[NL802154_DEVKEY_ATTR_MAX + 1];
1907         struct ieee802154_llsec_device_key key;
1908         __le64 extended_addr;
1909
1910         if (!info->attrs[NL802154_ATTR_SEC_DEVKEY] ||
1911             nla_parse_nested(attrs, NL802154_DEVKEY_ATTR_MAX,
1912                              info->attrs[NL802154_ATTR_SEC_DEVKEY],
1913                              nl802154_devkey_policy, info->extack) < 0)
1914                 return -EINVAL;
1915
1916         if (!attrs[NL802154_DEVKEY_ATTR_FRAME_COUNTER] ||
1917             !attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR])
1918                 return -EINVAL;
1919
1920         /* TODO change key.id ? */
1921         if (ieee802154_llsec_parse_key_id(attrs[NL802154_DEVKEY_ATTR_ID],
1922                                           &key.key_id) < 0)
1923                 return -ENOBUFS;
1924
1925         /* TODO be32 */
1926         key.frame_counter = nla_get_u32(attrs[NL802154_DEVKEY_ATTR_FRAME_COUNTER]);
1927         /* TODO change naming hwaddr -> extended_addr
1928          * check unique identifier short+pan OR extended_addr
1929          */
1930         extended_addr = nla_get_le64(attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]);
1931         return rdev_add_devkey(rdev, wpan_dev, extended_addr, &key);
1932 }
1933
1934 static int nl802154_del_llsec_devkey(struct sk_buff *skb, struct genl_info *info)
1935 {
1936         struct cfg802154_registered_device *rdev = info->user_ptr[0];
1937         struct net_device *dev = info->user_ptr[1];
1938         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1939         struct nlattr *attrs[NL802154_DEVKEY_ATTR_MAX + 1];
1940         struct ieee802154_llsec_device_key key;
1941         __le64 extended_addr;
1942
1943         if (nla_parse_nested(attrs, NL802154_DEVKEY_ATTR_MAX,
1944                              info->attrs[NL802154_ATTR_SEC_DEVKEY],
1945                              nl802154_devkey_policy, info->extack))
1946                 return -EINVAL;
1947
1948         if (!attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR])
1949                 return -EINVAL;
1950
1951         /* TODO change key.id ? */
1952         if (ieee802154_llsec_parse_key_id(attrs[NL802154_DEVKEY_ATTR_ID],
1953                                           &key.key_id) < 0)
1954                 return -ENOBUFS;
1955
1956         /* TODO change naming hwaddr -> extended_addr
1957          * check unique identifier short+pan OR extended_addr
1958          */
1959         extended_addr = nla_get_le64(attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]);
1960         return rdev_del_devkey(rdev, wpan_dev, extended_addr, &key);
1961 }
1962
1963 static int nl802154_send_seclevel(struct sk_buff *msg, u32 cmd, u32 portid,
1964                                   u32 seq, int flags,
1965                                   struct cfg802154_registered_device *rdev,
1966                                   struct net_device *dev,
1967                                   const struct ieee802154_llsec_seclevel *sl)
1968 {
1969         void *hdr;
1970         struct nlattr *nl_seclevel;
1971
1972         hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1973         if (!hdr)
1974                 return -1;
1975
1976         if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1977                 goto nla_put_failure;
1978
1979         nl_seclevel = nla_nest_start(msg, NL802154_ATTR_SEC_LEVEL);
1980         if (!nl_seclevel)
1981                 goto nla_put_failure;
1982
1983         if (nla_put_u32(msg, NL802154_SECLEVEL_ATTR_FRAME, sl->frame_type) ||
1984             nla_put_u32(msg, NL802154_SECLEVEL_ATTR_LEVELS, sl->sec_levels) ||
1985             nla_put_u8(msg, NL802154_SECLEVEL_ATTR_DEV_OVERRIDE,
1986                        sl->device_override))
1987                 goto nla_put_failure;
1988
1989         if (sl->frame_type == NL802154_FRAME_CMD) {
1990                 if (nla_put_u32(msg, NL802154_SECLEVEL_ATTR_CMD_FRAME,
1991                                 sl->cmd_frame_id))
1992                         goto nla_put_failure;
1993         }
1994
1995         nla_nest_end(msg, nl_seclevel);
1996         genlmsg_end(msg, hdr);
1997
1998         return 0;
1999
2000 nla_put_failure:
2001         genlmsg_cancel(msg, hdr);
2002         return -EMSGSIZE;
2003 }
2004
2005 static int
2006 nl802154_dump_llsec_seclevel(struct sk_buff *skb, struct netlink_callback *cb)
2007 {
2008         struct cfg802154_registered_device *rdev = NULL;
2009         struct ieee802154_llsec_seclevel *sl;
2010         struct ieee802154_llsec_table *table;
2011         struct wpan_dev *wpan_dev;
2012         int err;
2013
2014         err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
2015         if (err)
2016                 return err;
2017
2018         if (!wpan_dev->netdev) {
2019                 err = -EINVAL;
2020                 goto out_err;
2021         }
2022
2023         rdev_lock_llsec_table(rdev, wpan_dev);
2024         rdev_get_llsec_table(rdev, wpan_dev, &table);
2025
2026         /* TODO make it like station dump */
2027         if (cb->args[2])
2028                 goto out;
2029
2030         list_for_each_entry(sl, &table->security_levels, list) {
2031                 if (nl802154_send_seclevel(skb, NL802154_CMD_NEW_SEC_LEVEL,
2032                                            NETLINK_CB(cb->skb).portid,
2033                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
2034                                            rdev, wpan_dev->netdev, sl) < 0) {
2035                         /* TODO */
2036                         err = -EIO;
2037                         rdev_unlock_llsec_table(rdev, wpan_dev);
2038                         goto out_err;
2039                 }
2040         }
2041
2042         cb->args[2] = 1;
2043
2044 out:
2045         rdev_unlock_llsec_table(rdev, wpan_dev);
2046         err = skb->len;
2047 out_err:
2048         nl802154_finish_wpan_dev_dump(rdev);
2049
2050         return err;
2051 }
2052
2053 static const struct nla_policy nl802154_seclevel_policy[NL802154_SECLEVEL_ATTR_MAX + 1] = {
2054         [NL802154_SECLEVEL_ATTR_LEVELS] = { .type = NLA_U8 },
2055         [NL802154_SECLEVEL_ATTR_FRAME] = { .type = NLA_U32 },
2056         [NL802154_SECLEVEL_ATTR_CMD_FRAME] = { .type = NLA_U32 },
2057         [NL802154_SECLEVEL_ATTR_DEV_OVERRIDE] = { .type = NLA_U8 },
2058 };
2059
2060 static int
2061 llsec_parse_seclevel(struct nlattr *nla, struct ieee802154_llsec_seclevel *sl)
2062 {
2063         struct nlattr *attrs[NL802154_SECLEVEL_ATTR_MAX + 1];
2064
2065         if (!nla || nla_parse_nested(attrs, NL802154_SECLEVEL_ATTR_MAX,
2066                                      nla, nl802154_seclevel_policy, NULL))
2067                 return -EINVAL;
2068
2069         memset(sl, 0, sizeof(*sl));
2070
2071         if (!attrs[NL802154_SECLEVEL_ATTR_LEVELS] ||
2072             !attrs[NL802154_SECLEVEL_ATTR_FRAME] ||
2073             !attrs[NL802154_SECLEVEL_ATTR_DEV_OVERRIDE])
2074                 return -EINVAL;
2075
2076         sl->sec_levels = nla_get_u8(attrs[NL802154_SECLEVEL_ATTR_LEVELS]);
2077         sl->frame_type = nla_get_u32(attrs[NL802154_SECLEVEL_ATTR_FRAME]);
2078         sl->device_override = nla_get_u8(attrs[NL802154_SECLEVEL_ATTR_DEV_OVERRIDE]);
2079         if (sl->frame_type > NL802154_FRAME_MAX ||
2080             (sl->device_override != 0 && sl->device_override != 1))
2081                 return -EINVAL;
2082
2083         if (sl->frame_type == NL802154_FRAME_CMD) {
2084                 if (!attrs[NL802154_SECLEVEL_ATTR_CMD_FRAME])
2085                         return -EINVAL;
2086
2087                 sl->cmd_frame_id = nla_get_u32(attrs[NL802154_SECLEVEL_ATTR_CMD_FRAME]);
2088                 if (sl->cmd_frame_id > NL802154_CMD_FRAME_MAX)
2089                         return -EINVAL;
2090         }
2091
2092         return 0;
2093 }
2094
2095 static int nl802154_add_llsec_seclevel(struct sk_buff *skb,
2096                                        struct genl_info *info)
2097 {
2098         struct cfg802154_registered_device *rdev = info->user_ptr[0];
2099         struct net_device *dev = info->user_ptr[1];
2100         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2101         struct ieee802154_llsec_seclevel sl;
2102
2103         if (llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
2104                                  &sl) < 0)
2105                 return -EINVAL;
2106
2107         return rdev_add_seclevel(rdev, wpan_dev, &sl);
2108 }
2109
2110 static int nl802154_del_llsec_seclevel(struct sk_buff *skb,
2111                                        struct genl_info *info)
2112 {
2113         struct cfg802154_registered_device *rdev = info->user_ptr[0];
2114         struct net_device *dev = info->user_ptr[1];
2115         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2116         struct ieee802154_llsec_seclevel sl;
2117
2118         if (!info->attrs[NL802154_ATTR_SEC_LEVEL] ||
2119             llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
2120                                  &sl) < 0)
2121                 return -EINVAL;
2122
2123         return rdev_del_seclevel(rdev, wpan_dev, &sl);
2124 }
2125 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
2126
2127 #define NL802154_FLAG_NEED_WPAN_PHY     0x01
2128 #define NL802154_FLAG_NEED_NETDEV       0x02
2129 #define NL802154_FLAG_NEED_RTNL         0x04
2130 #define NL802154_FLAG_CHECK_NETDEV_UP   0x08
2131 #define NL802154_FLAG_NEED_NETDEV_UP    (NL802154_FLAG_NEED_NETDEV |\
2132                                          NL802154_FLAG_CHECK_NETDEV_UP)
2133 #define NL802154_FLAG_NEED_WPAN_DEV     0x10
2134 #define NL802154_FLAG_NEED_WPAN_DEV_UP  (NL802154_FLAG_NEED_WPAN_DEV |\
2135                                          NL802154_FLAG_CHECK_NETDEV_UP)
2136
2137 static int nl802154_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
2138                              struct genl_info *info)
2139 {
2140         struct cfg802154_registered_device *rdev;
2141         struct wpan_dev *wpan_dev;
2142         struct net_device *dev;
2143         bool rtnl = ops->internal_flags & NL802154_FLAG_NEED_RTNL;
2144
2145         if (rtnl)
2146                 rtnl_lock();
2147
2148         if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_PHY) {
2149                 rdev = cfg802154_get_dev_from_info(genl_info_net(info), info);
2150                 if (IS_ERR(rdev)) {
2151                         if (rtnl)
2152                                 rtnl_unlock();
2153                         return PTR_ERR(rdev);
2154                 }
2155                 info->user_ptr[0] = rdev;
2156         } else if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV ||
2157                    ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) {
2158                 ASSERT_RTNL();
2159                 wpan_dev = __cfg802154_wpan_dev_from_attrs(genl_info_net(info),
2160                                                            info->attrs);
2161                 if (IS_ERR(wpan_dev)) {
2162                         if (rtnl)
2163                                 rtnl_unlock();
2164                         return PTR_ERR(wpan_dev);
2165                 }
2166
2167                 dev = wpan_dev->netdev;
2168                 rdev = wpan_phy_to_rdev(wpan_dev->wpan_phy);
2169
2170                 if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV) {
2171                         if (!dev) {
2172                                 if (rtnl)
2173                                         rtnl_unlock();
2174                                 return -EINVAL;
2175                         }
2176
2177                         info->user_ptr[1] = dev;
2178                 } else {
2179                         info->user_ptr[1] = wpan_dev;
2180                 }
2181
2182                 if (dev) {
2183                         if (ops->internal_flags & NL802154_FLAG_CHECK_NETDEV_UP &&
2184                             !netif_running(dev)) {
2185                                 if (rtnl)
2186                                         rtnl_unlock();
2187                                 return -ENETDOWN;
2188                         }
2189
2190                         dev_hold(dev);
2191                 }
2192
2193                 info->user_ptr[0] = rdev;
2194         }
2195
2196         return 0;
2197 }
2198
2199 static void nl802154_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
2200                                struct genl_info *info)
2201 {
2202         if (info->user_ptr[1]) {
2203                 if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) {
2204                         struct wpan_dev *wpan_dev = info->user_ptr[1];
2205
2206                         if (wpan_dev->netdev)
2207                                 dev_put(wpan_dev->netdev);
2208                 } else {
2209                         dev_put(info->user_ptr[1]);
2210                 }
2211         }
2212
2213         if (ops->internal_flags & NL802154_FLAG_NEED_RTNL)
2214                 rtnl_unlock();
2215 }
2216
2217 static const struct genl_ops nl802154_ops[] = {
2218         {
2219                 .cmd = NL802154_CMD_GET_WPAN_PHY,
2220                 .doit = nl802154_get_wpan_phy,
2221                 .dumpit = nl802154_dump_wpan_phy,
2222                 .done = nl802154_dump_wpan_phy_done,
2223                 .policy = nl802154_policy,
2224                 /* can be retrieved by unprivileged users */
2225                 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2226                                   NL802154_FLAG_NEED_RTNL,
2227         },
2228         {
2229                 .cmd = NL802154_CMD_GET_INTERFACE,
2230                 .doit = nl802154_get_interface,
2231                 .dumpit = nl802154_dump_interface,
2232                 .policy = nl802154_policy,
2233                 /* can be retrieved by unprivileged users */
2234                 .internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
2235                                   NL802154_FLAG_NEED_RTNL,
2236         },
2237         {
2238                 .cmd = NL802154_CMD_NEW_INTERFACE,
2239                 .doit = nl802154_new_interface,
2240                 .policy = nl802154_policy,
2241                 .flags = GENL_ADMIN_PERM,
2242                 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2243                                   NL802154_FLAG_NEED_RTNL,
2244         },
2245         {
2246                 .cmd = NL802154_CMD_DEL_INTERFACE,
2247                 .doit = nl802154_del_interface,
2248                 .policy = nl802154_policy,
2249                 .flags = GENL_ADMIN_PERM,
2250                 .internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
2251                                   NL802154_FLAG_NEED_RTNL,
2252         },
2253         {
2254                 .cmd = NL802154_CMD_SET_CHANNEL,
2255                 .doit = nl802154_set_channel,
2256                 .policy = nl802154_policy,
2257                 .flags = GENL_ADMIN_PERM,
2258                 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2259                                   NL802154_FLAG_NEED_RTNL,
2260         },
2261         {
2262                 .cmd = NL802154_CMD_SET_CCA_MODE,
2263                 .doit = nl802154_set_cca_mode,
2264                 .policy = nl802154_policy,
2265                 .flags = GENL_ADMIN_PERM,
2266                 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2267                                   NL802154_FLAG_NEED_RTNL,
2268         },
2269         {
2270                 .cmd = NL802154_CMD_SET_CCA_ED_LEVEL,
2271                 .doit = nl802154_set_cca_ed_level,
2272                 .policy = nl802154_policy,
2273                 .flags = GENL_ADMIN_PERM,
2274                 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2275                                   NL802154_FLAG_NEED_RTNL,
2276         },
2277         {
2278                 .cmd = NL802154_CMD_SET_TX_POWER,
2279                 .doit = nl802154_set_tx_power,
2280                 .policy = nl802154_policy,
2281                 .flags = GENL_ADMIN_PERM,
2282                 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2283                                   NL802154_FLAG_NEED_RTNL,
2284         },
2285         {
2286                 .cmd = NL802154_CMD_SET_WPAN_PHY_NETNS,
2287                 .doit = nl802154_wpan_phy_netns,
2288                 .policy = nl802154_policy,
2289                 .flags = GENL_ADMIN_PERM,
2290                 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2291                                   NL802154_FLAG_NEED_RTNL,
2292         },
2293         {
2294                 .cmd = NL802154_CMD_SET_PAN_ID,
2295                 .doit = nl802154_set_pan_id,
2296                 .policy = nl802154_policy,
2297                 .flags = GENL_ADMIN_PERM,
2298                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2299                                   NL802154_FLAG_NEED_RTNL,
2300         },
2301         {
2302                 .cmd = NL802154_CMD_SET_SHORT_ADDR,
2303                 .doit = nl802154_set_short_addr,
2304                 .policy = nl802154_policy,
2305                 .flags = GENL_ADMIN_PERM,
2306                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2307                                   NL802154_FLAG_NEED_RTNL,
2308         },
2309         {
2310                 .cmd = NL802154_CMD_SET_BACKOFF_EXPONENT,
2311                 .doit = nl802154_set_backoff_exponent,
2312                 .policy = nl802154_policy,
2313                 .flags = GENL_ADMIN_PERM,
2314                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2315                                   NL802154_FLAG_NEED_RTNL,
2316         },
2317         {
2318                 .cmd = NL802154_CMD_SET_MAX_CSMA_BACKOFFS,
2319                 .doit = nl802154_set_max_csma_backoffs,
2320                 .policy = nl802154_policy,
2321                 .flags = GENL_ADMIN_PERM,
2322                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2323                                   NL802154_FLAG_NEED_RTNL,
2324         },
2325         {
2326                 .cmd = NL802154_CMD_SET_MAX_FRAME_RETRIES,
2327                 .doit = nl802154_set_max_frame_retries,
2328                 .policy = nl802154_policy,
2329                 .flags = GENL_ADMIN_PERM,
2330                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2331                                   NL802154_FLAG_NEED_RTNL,
2332         },
2333         {
2334                 .cmd = NL802154_CMD_SET_LBT_MODE,
2335                 .doit = nl802154_set_lbt_mode,
2336                 .policy = nl802154_policy,
2337                 .flags = GENL_ADMIN_PERM,
2338                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2339                                   NL802154_FLAG_NEED_RTNL,
2340         },
2341         {
2342                 .cmd = NL802154_CMD_SET_ACKREQ_DEFAULT,
2343                 .doit = nl802154_set_ackreq_default,
2344                 .policy = nl802154_policy,
2345                 .flags = GENL_ADMIN_PERM,
2346                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2347                                   NL802154_FLAG_NEED_RTNL,
2348         },
2349 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
2350         {
2351                 .cmd = NL802154_CMD_SET_SEC_PARAMS,
2352                 .doit = nl802154_set_llsec_params,
2353                 .policy = nl802154_policy,
2354                 .flags = GENL_ADMIN_PERM,
2355                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2356                                   NL802154_FLAG_NEED_RTNL,
2357         },
2358         {
2359                 .cmd = NL802154_CMD_GET_SEC_KEY,
2360                 /* TODO .doit by matching key id? */
2361                 .dumpit = nl802154_dump_llsec_key,
2362                 .policy = nl802154_policy,
2363                 .flags = GENL_ADMIN_PERM,
2364                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2365                                   NL802154_FLAG_NEED_RTNL,
2366         },
2367         {
2368                 .cmd = NL802154_CMD_NEW_SEC_KEY,
2369                 .doit = nl802154_add_llsec_key,
2370                 .policy = nl802154_policy,
2371                 .flags = GENL_ADMIN_PERM,
2372                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2373                                   NL802154_FLAG_NEED_RTNL,
2374         },
2375         {
2376                 .cmd = NL802154_CMD_DEL_SEC_KEY,
2377                 .doit = nl802154_del_llsec_key,
2378                 .policy = nl802154_policy,
2379                 .flags = GENL_ADMIN_PERM,
2380                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2381                                   NL802154_FLAG_NEED_RTNL,
2382         },
2383         /* TODO unique identifier must short+pan OR extended_addr */
2384         {
2385                 .cmd = NL802154_CMD_GET_SEC_DEV,
2386                 /* TODO .doit by matching extended_addr? */
2387                 .dumpit = nl802154_dump_llsec_dev,
2388                 .policy = nl802154_policy,
2389                 .flags = GENL_ADMIN_PERM,
2390                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2391                                   NL802154_FLAG_NEED_RTNL,
2392         },
2393         {
2394                 .cmd = NL802154_CMD_NEW_SEC_DEV,
2395                 .doit = nl802154_add_llsec_dev,
2396                 .policy = nl802154_policy,
2397                 .flags = GENL_ADMIN_PERM,
2398                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2399                                   NL802154_FLAG_NEED_RTNL,
2400         },
2401         {
2402                 .cmd = NL802154_CMD_DEL_SEC_DEV,
2403                 .doit = nl802154_del_llsec_dev,
2404                 .policy = nl802154_policy,
2405                 .flags = GENL_ADMIN_PERM,
2406                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2407                                   NL802154_FLAG_NEED_RTNL,
2408         },
2409         /* TODO remove complete devkey, put it as nested? */
2410         {
2411                 .cmd = NL802154_CMD_GET_SEC_DEVKEY,
2412                 /* TODO doit by matching ??? */
2413                 .dumpit = nl802154_dump_llsec_devkey,
2414                 .policy = nl802154_policy,
2415                 .flags = GENL_ADMIN_PERM,
2416                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2417                                   NL802154_FLAG_NEED_RTNL,
2418         },
2419         {
2420                 .cmd = NL802154_CMD_NEW_SEC_DEVKEY,
2421                 .doit = nl802154_add_llsec_devkey,
2422                 .policy = nl802154_policy,
2423                 .flags = GENL_ADMIN_PERM,
2424                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2425                                   NL802154_FLAG_NEED_RTNL,
2426         },
2427         {
2428                 .cmd = NL802154_CMD_DEL_SEC_DEVKEY,
2429                 .doit = nl802154_del_llsec_devkey,
2430                 .policy = nl802154_policy,
2431                 .flags = GENL_ADMIN_PERM,
2432                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2433                                   NL802154_FLAG_NEED_RTNL,
2434         },
2435         {
2436                 .cmd = NL802154_CMD_GET_SEC_LEVEL,
2437                 /* TODO .doit by matching frame_type? */
2438                 .dumpit = nl802154_dump_llsec_seclevel,
2439                 .policy = nl802154_policy,
2440                 .flags = GENL_ADMIN_PERM,
2441                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2442                                   NL802154_FLAG_NEED_RTNL,
2443         },
2444         {
2445                 .cmd = NL802154_CMD_NEW_SEC_LEVEL,
2446                 .doit = nl802154_add_llsec_seclevel,
2447                 .policy = nl802154_policy,
2448                 .flags = GENL_ADMIN_PERM,
2449                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2450                                   NL802154_FLAG_NEED_RTNL,
2451         },
2452         {
2453                 .cmd = NL802154_CMD_DEL_SEC_LEVEL,
2454                 /* TODO match frame_type only? */
2455                 .doit = nl802154_del_llsec_seclevel,
2456                 .policy = nl802154_policy,
2457                 .flags = GENL_ADMIN_PERM,
2458                 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2459                                   NL802154_FLAG_NEED_RTNL,
2460         },
2461 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
2462 };
2463
2464 static struct genl_family nl802154_fam __ro_after_init = {
2465         .name = NL802154_GENL_NAME,     /* have users key off the name instead */
2466         .hdrsize = 0,                   /* no private header */
2467         .version = 1,                   /* no particular meaning now */
2468         .maxattr = NL802154_ATTR_MAX,
2469         .netnsok = true,
2470         .pre_doit = nl802154_pre_doit,
2471         .post_doit = nl802154_post_doit,
2472         .module = THIS_MODULE,
2473         .ops = nl802154_ops,
2474         .n_ops = ARRAY_SIZE(nl802154_ops),
2475         .mcgrps = nl802154_mcgrps,
2476         .n_mcgrps = ARRAY_SIZE(nl802154_mcgrps),
2477 };
2478
2479 /* initialisation/exit functions */
2480 int __init nl802154_init(void)
2481 {
2482         return genl_register_family(&nl802154_fam);
2483 }
2484
2485 void nl802154_exit(void)
2486 {
2487         genl_unregister_family(&nl802154_fam);
2488 }