alex.bluesman.smirnov@gmail.com | 32bad7e | 2012-06-25 23:24:48 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2007-2012 Siemens AG |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 |
| 6 | * as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | * |
| 17 | * Written by: |
| 18 | * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> |
| 19 | * Sergey Lapin <slapin@ossfans.org> |
| 20 | * Maxim Gorbachyov <maxim.gorbachev@siemens.com> |
| 21 | * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> |
| 22 | */ |
| 23 | |
| 24 | #include <linux/netdevice.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/if_arp.h> |
| 27 | |
| 28 | #include <net/rtnetlink.h> |
| 29 | #include <linux/nl802154.h> |
| 30 | #include <net/af_ieee802154.h> |
| 31 | #include <net/mac802154.h> |
| 32 | #include <net/ieee802154_netdev.h> |
| 33 | #include <net/ieee802154.h> |
| 34 | #include <net/wpan-phy.h> |
| 35 | |
| 36 | #include "mac802154.h" |
| 37 | |
| 38 | static inline int mac802154_fetch_skb_u8(struct sk_buff *skb, u8 *val) |
| 39 | { |
| 40 | if (unlikely(!pskb_may_pull(skb, 1))) |
| 41 | return -EINVAL; |
| 42 | |
| 43 | *val = skb->data[0]; |
Alexander Aring | f458c64 | 2013-02-05 04:25:35 +0000 | [diff] [blame] | 44 | skb_pull(skb, 1); |
alex.bluesman.smirnov@gmail.com | 32bad7e | 2012-06-25 23:24:48 +0000 | [diff] [blame] | 45 | |
| 46 | return 0; |
| 47 | } |
| 48 | |
| 49 | static inline int mac802154_fetch_skb_u16(struct sk_buff *skb, u16 *val) |
| 50 | { |
| 51 | if (unlikely(!pskb_may_pull(skb, 2))) |
| 52 | return -EINVAL; |
| 53 | |
| 54 | *val = skb->data[0] | (skb->data[1] << 8); |
| 55 | skb_pull(skb, 2); |
| 56 | |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | static inline void mac802154_haddr_copy_swap(u8 *dest, const u8 *src) |
| 61 | { |
| 62 | int i; |
| 63 | for (i = 0; i < IEEE802154_ADDR_LEN; i++) |
| 64 | dest[IEEE802154_ADDR_LEN - i - 1] = src[i]; |
| 65 | } |
| 66 | |
| 67 | static int |
| 68 | mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 69 | { |
| 70 | struct mac802154_sub_if_data *priv = netdev_priv(dev); |
| 71 | struct sockaddr_ieee802154 *sa = |
| 72 | (struct sockaddr_ieee802154 *)&ifr->ifr_addr; |
| 73 | int err = -ENOIOCTLCMD; |
| 74 | |
| 75 | spin_lock_bh(&priv->mib_lock); |
| 76 | |
| 77 | switch (cmd) { |
| 78 | case SIOCGIFADDR: |
| 79 | if (priv->pan_id == IEEE802154_PANID_BROADCAST || |
| 80 | priv->short_addr == IEEE802154_ADDR_BROADCAST) { |
| 81 | err = -EADDRNOTAVAIL; |
| 82 | break; |
| 83 | } |
| 84 | |
| 85 | sa->family = AF_IEEE802154; |
| 86 | sa->addr.addr_type = IEEE802154_ADDR_SHORT; |
| 87 | sa->addr.pan_id = priv->pan_id; |
| 88 | sa->addr.short_addr = priv->short_addr; |
| 89 | |
| 90 | err = 0; |
| 91 | break; |
| 92 | case SIOCSIFADDR: |
| 93 | dev_warn(&dev->dev, |
| 94 | "Using DEBUGing ioctl SIOCSIFADDR isn't recommened!\n"); |
| 95 | if (sa->family != AF_IEEE802154 || |
| 96 | sa->addr.addr_type != IEEE802154_ADDR_SHORT || |
| 97 | sa->addr.pan_id == IEEE802154_PANID_BROADCAST || |
| 98 | sa->addr.short_addr == IEEE802154_ADDR_BROADCAST || |
| 99 | sa->addr.short_addr == IEEE802154_ADDR_UNDEF) { |
| 100 | err = -EINVAL; |
| 101 | break; |
| 102 | } |
| 103 | |
| 104 | priv->pan_id = sa->addr.pan_id; |
| 105 | priv->short_addr = sa->addr.short_addr; |
| 106 | |
| 107 | err = 0; |
| 108 | break; |
| 109 | } |
| 110 | |
| 111 | spin_unlock_bh(&priv->mib_lock); |
| 112 | return err; |
| 113 | } |
| 114 | |
| 115 | static int mac802154_wpan_mac_addr(struct net_device *dev, void *p) |
| 116 | { |
| 117 | struct sockaddr *addr = p; |
| 118 | |
| 119 | if (netif_running(dev)) |
| 120 | return -EBUSY; |
| 121 | |
| 122 | /* FIXME: validate addr */ |
| 123 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
| 124 | mac802154_dev_set_ieee_addr(dev); |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | static int mac802154_header_create(struct sk_buff *skb, |
| 129 | struct net_device *dev, |
| 130 | unsigned short type, |
| 131 | const void *_daddr, |
| 132 | const void *_saddr, |
| 133 | unsigned len) |
| 134 | { |
| 135 | const struct ieee802154_addr *saddr = _saddr; |
| 136 | const struct ieee802154_addr *daddr = _daddr; |
| 137 | struct ieee802154_addr dev_addr; |
| 138 | struct mac802154_sub_if_data *priv = netdev_priv(dev); |
| 139 | int pos = 2; |
| 140 | u8 *head; |
| 141 | u16 fc; |
| 142 | |
| 143 | if (!daddr) |
| 144 | return -EINVAL; |
| 145 | |
| 146 | head = kzalloc(MAC802154_FRAME_HARD_HEADER_LEN, GFP_KERNEL); |
| 147 | if (head == NULL) |
| 148 | return -ENOMEM; |
| 149 | |
| 150 | head[pos++] = mac_cb(skb)->seq; /* DSN/BSN */ |
| 151 | fc = mac_cb_type(skb); |
| 152 | |
| 153 | if (!saddr) { |
| 154 | spin_lock_bh(&priv->mib_lock); |
| 155 | |
| 156 | if (priv->short_addr == IEEE802154_ADDR_BROADCAST || |
| 157 | priv->short_addr == IEEE802154_ADDR_UNDEF || |
| 158 | priv->pan_id == IEEE802154_PANID_BROADCAST) { |
| 159 | dev_addr.addr_type = IEEE802154_ADDR_LONG; |
| 160 | memcpy(dev_addr.hwaddr, dev->dev_addr, |
| 161 | IEEE802154_ADDR_LEN); |
| 162 | } else { |
| 163 | dev_addr.addr_type = IEEE802154_ADDR_SHORT; |
| 164 | dev_addr.short_addr = priv->short_addr; |
| 165 | } |
| 166 | |
| 167 | dev_addr.pan_id = priv->pan_id; |
| 168 | saddr = &dev_addr; |
| 169 | |
| 170 | spin_unlock_bh(&priv->mib_lock); |
| 171 | } |
| 172 | |
| 173 | if (daddr->addr_type != IEEE802154_ADDR_NONE) { |
| 174 | fc |= (daddr->addr_type << IEEE802154_FC_DAMODE_SHIFT); |
| 175 | |
| 176 | head[pos++] = daddr->pan_id & 0xff; |
| 177 | head[pos++] = daddr->pan_id >> 8; |
| 178 | |
| 179 | if (daddr->addr_type == IEEE802154_ADDR_SHORT) { |
| 180 | head[pos++] = daddr->short_addr & 0xff; |
| 181 | head[pos++] = daddr->short_addr >> 8; |
| 182 | } else { |
| 183 | mac802154_haddr_copy_swap(head + pos, daddr->hwaddr); |
| 184 | pos += IEEE802154_ADDR_LEN; |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | if (saddr->addr_type != IEEE802154_ADDR_NONE) { |
| 189 | fc |= (saddr->addr_type << IEEE802154_FC_SAMODE_SHIFT); |
| 190 | |
| 191 | if ((saddr->pan_id == daddr->pan_id) && |
| 192 | (saddr->pan_id != IEEE802154_PANID_BROADCAST)) { |
| 193 | /* PANID compression/intra PAN */ |
| 194 | fc |= IEEE802154_FC_INTRA_PAN; |
| 195 | } else { |
| 196 | head[pos++] = saddr->pan_id & 0xff; |
| 197 | head[pos++] = saddr->pan_id >> 8; |
| 198 | } |
| 199 | |
| 200 | if (saddr->addr_type == IEEE802154_ADDR_SHORT) { |
| 201 | head[pos++] = saddr->short_addr & 0xff; |
| 202 | head[pos++] = saddr->short_addr >> 8; |
| 203 | } else { |
| 204 | mac802154_haddr_copy_swap(head + pos, saddr->hwaddr); |
| 205 | pos += IEEE802154_ADDR_LEN; |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | head[0] = fc; |
| 210 | head[1] = fc >> 8; |
| 211 | |
| 212 | memcpy(skb_push(skb, pos), head, pos); |
| 213 | kfree(head); |
| 214 | |
| 215 | return pos; |
| 216 | } |
| 217 | |
| 218 | static int |
| 219 | mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr) |
| 220 | { |
| 221 | const u8 *hdr = skb_mac_header(skb); |
| 222 | const u8 *tail = skb_tail_pointer(skb); |
| 223 | struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr; |
| 224 | u16 fc; |
| 225 | int da_type; |
| 226 | |
| 227 | if (hdr + 3 > tail) |
| 228 | goto malformed; |
| 229 | |
| 230 | fc = hdr[0] | (hdr[1] << 8); |
| 231 | |
| 232 | hdr += 3; |
| 233 | |
| 234 | da_type = IEEE802154_FC_DAMODE(fc); |
| 235 | addr->addr_type = IEEE802154_FC_SAMODE(fc); |
| 236 | |
| 237 | switch (da_type) { |
| 238 | case IEEE802154_ADDR_NONE: |
| 239 | if (fc & IEEE802154_FC_INTRA_PAN) |
| 240 | goto malformed; |
| 241 | break; |
| 242 | case IEEE802154_ADDR_LONG: |
| 243 | if (fc & IEEE802154_FC_INTRA_PAN) { |
| 244 | if (hdr + 2 > tail) |
| 245 | goto malformed; |
| 246 | addr->pan_id = hdr[0] | (hdr[1] << 8); |
| 247 | hdr += 2; |
| 248 | } |
| 249 | |
| 250 | if (hdr + IEEE802154_ADDR_LEN > tail) |
| 251 | goto malformed; |
| 252 | |
| 253 | hdr += IEEE802154_ADDR_LEN; |
| 254 | break; |
| 255 | case IEEE802154_ADDR_SHORT: |
| 256 | if (fc & IEEE802154_FC_INTRA_PAN) { |
| 257 | if (hdr + 2 > tail) |
| 258 | goto malformed; |
| 259 | addr->pan_id = hdr[0] | (hdr[1] << 8); |
| 260 | hdr += 2; |
| 261 | } |
| 262 | |
| 263 | if (hdr + 2 > tail) |
| 264 | goto malformed; |
| 265 | |
| 266 | hdr += 2; |
| 267 | break; |
| 268 | default: |
| 269 | goto malformed; |
| 270 | |
| 271 | } |
| 272 | |
| 273 | switch (addr->addr_type) { |
| 274 | case IEEE802154_ADDR_NONE: |
| 275 | break; |
| 276 | case IEEE802154_ADDR_LONG: |
| 277 | if (!(fc & IEEE802154_FC_INTRA_PAN)) { |
| 278 | if (hdr + 2 > tail) |
| 279 | goto malformed; |
| 280 | addr->pan_id = hdr[0] | (hdr[1] << 8); |
| 281 | hdr += 2; |
| 282 | } |
| 283 | |
| 284 | if (hdr + IEEE802154_ADDR_LEN > tail) |
| 285 | goto malformed; |
| 286 | |
| 287 | mac802154_haddr_copy_swap(addr->hwaddr, hdr); |
| 288 | hdr += IEEE802154_ADDR_LEN; |
| 289 | break; |
| 290 | case IEEE802154_ADDR_SHORT: |
| 291 | if (!(fc & IEEE802154_FC_INTRA_PAN)) { |
| 292 | if (hdr + 2 > tail) |
| 293 | goto malformed; |
| 294 | addr->pan_id = hdr[0] | (hdr[1] << 8); |
| 295 | hdr += 2; |
| 296 | } |
| 297 | |
| 298 | if (hdr + 2 > tail) |
| 299 | goto malformed; |
| 300 | |
| 301 | addr->short_addr = hdr[0] | (hdr[1] << 8); |
| 302 | hdr += 2; |
| 303 | break; |
| 304 | default: |
| 305 | goto malformed; |
| 306 | } |
| 307 | |
| 308 | return sizeof(struct ieee802154_addr); |
| 309 | |
| 310 | malformed: |
| 311 | pr_debug("malformed packet\n"); |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | static netdev_tx_t |
| 316 | mac802154_wpan_xmit(struct sk_buff *skb, struct net_device *dev) |
| 317 | { |
| 318 | struct mac802154_sub_if_data *priv; |
| 319 | u8 chan, page; |
| 320 | |
| 321 | priv = netdev_priv(dev); |
| 322 | |
| 323 | spin_lock_bh(&priv->mib_lock); |
| 324 | chan = priv->chan; |
| 325 | page = priv->page; |
| 326 | spin_unlock_bh(&priv->mib_lock); |
| 327 | |
| 328 | if (chan == MAC802154_CHAN_NONE || |
| 329 | page >= WPAN_NUM_PAGES || |
Alan Ott | fcefbe9 | 2012-11-29 18:25:10 +0000 | [diff] [blame] | 330 | chan >= WPAN_NUM_CHANNELS) { |
| 331 | kfree_skb(skb); |
alex.bluesman.smirnov@gmail.com | 32bad7e | 2012-06-25 23:24:48 +0000 | [diff] [blame] | 332 | return NETDEV_TX_OK; |
Alan Ott | fcefbe9 | 2012-11-29 18:25:10 +0000 | [diff] [blame] | 333 | } |
alex.bluesman.smirnov@gmail.com | 32bad7e | 2012-06-25 23:24:48 +0000 | [diff] [blame] | 334 | |
| 335 | skb->skb_iif = dev->ifindex; |
| 336 | dev->stats.tx_packets++; |
| 337 | dev->stats.tx_bytes += skb->len; |
| 338 | |
| 339 | return mac802154_tx(priv->hw, skb, page, chan); |
| 340 | } |
| 341 | |
| 342 | static struct header_ops mac802154_header_ops = { |
| 343 | .create = mac802154_header_create, |
| 344 | .parse = mac802154_header_parse, |
| 345 | }; |
| 346 | |
| 347 | static const struct net_device_ops mac802154_wpan_ops = { |
| 348 | .ndo_open = mac802154_slave_open, |
| 349 | .ndo_stop = mac802154_slave_close, |
| 350 | .ndo_start_xmit = mac802154_wpan_xmit, |
| 351 | .ndo_do_ioctl = mac802154_wpan_ioctl, |
| 352 | .ndo_set_mac_address = mac802154_wpan_mac_addr, |
| 353 | }; |
| 354 | |
| 355 | void mac802154_wpan_setup(struct net_device *dev) |
| 356 | { |
| 357 | struct mac802154_sub_if_data *priv; |
| 358 | |
| 359 | dev->addr_len = IEEE802154_ADDR_LEN; |
| 360 | memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN); |
| 361 | |
| 362 | dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN; |
| 363 | dev->header_ops = &mac802154_header_ops; |
| 364 | dev->needed_tailroom = 2; /* FCS */ |
| 365 | dev->mtu = IEEE802154_MTU; |
| 366 | dev->tx_queue_len = 10; |
| 367 | dev->type = ARPHRD_IEEE802154; |
| 368 | dev->flags = IFF_NOARP | IFF_BROADCAST; |
| 369 | dev->watchdog_timeo = 0; |
| 370 | |
| 371 | dev->destructor = free_netdev; |
| 372 | dev->netdev_ops = &mac802154_wpan_ops; |
| 373 | dev->ml_priv = &mac802154_mlme_wpan; |
| 374 | |
| 375 | priv = netdev_priv(dev); |
| 376 | priv->type = IEEE802154_DEV_WPAN; |
| 377 | |
| 378 | priv->chan = MAC802154_CHAN_NONE; |
| 379 | priv->page = 0; |
| 380 | |
| 381 | spin_lock_init(&priv->mib_lock); |
| 382 | |
| 383 | get_random_bytes(&priv->bsn, 1); |
| 384 | get_random_bytes(&priv->dsn, 1); |
| 385 | |
| 386 | priv->pan_id = IEEE802154_PANID_BROADCAST; |
| 387 | priv->short_addr = IEEE802154_ADDR_BROADCAST; |
| 388 | } |
| 389 | |
| 390 | static int mac802154_process_data(struct net_device *dev, struct sk_buff *skb) |
| 391 | { |
Alexander Aring | 5ff3fec | 2013-01-02 01:01:10 +0000 | [diff] [blame] | 392 | return netif_rx_ni(skb); |
alex.bluesman.smirnov@gmail.com | 32bad7e | 2012-06-25 23:24:48 +0000 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | static int |
| 396 | mac802154_subif_frame(struct mac802154_sub_if_data *sdata, struct sk_buff *skb) |
| 397 | { |
| 398 | pr_debug("getting packet via slave interface %s\n", sdata->dev->name); |
| 399 | |
| 400 | spin_lock_bh(&sdata->mib_lock); |
| 401 | |
| 402 | switch (mac_cb(skb)->da.addr_type) { |
| 403 | case IEEE802154_ADDR_NONE: |
| 404 | if (mac_cb(skb)->sa.addr_type != IEEE802154_ADDR_NONE) |
| 405 | /* FIXME: check if we are PAN coordinator */ |
| 406 | skb->pkt_type = PACKET_OTHERHOST; |
| 407 | else |
| 408 | /* ACK comes with both addresses empty */ |
| 409 | skb->pkt_type = PACKET_HOST; |
| 410 | break; |
| 411 | case IEEE802154_ADDR_LONG: |
| 412 | if (mac_cb(skb)->da.pan_id != sdata->pan_id && |
| 413 | mac_cb(skb)->da.pan_id != IEEE802154_PANID_BROADCAST) |
| 414 | skb->pkt_type = PACKET_OTHERHOST; |
| 415 | else if (!memcmp(mac_cb(skb)->da.hwaddr, sdata->dev->dev_addr, |
| 416 | IEEE802154_ADDR_LEN)) |
| 417 | skb->pkt_type = PACKET_HOST; |
| 418 | else |
| 419 | skb->pkt_type = PACKET_OTHERHOST; |
| 420 | break; |
| 421 | case IEEE802154_ADDR_SHORT: |
| 422 | if (mac_cb(skb)->da.pan_id != sdata->pan_id && |
| 423 | mac_cb(skb)->da.pan_id != IEEE802154_PANID_BROADCAST) |
| 424 | skb->pkt_type = PACKET_OTHERHOST; |
| 425 | else if (mac_cb(skb)->da.short_addr == sdata->short_addr) |
| 426 | skb->pkt_type = PACKET_HOST; |
| 427 | else if (mac_cb(skb)->da.short_addr == |
| 428 | IEEE802154_ADDR_BROADCAST) |
| 429 | skb->pkt_type = PACKET_BROADCAST; |
| 430 | else |
| 431 | skb->pkt_type = PACKET_OTHERHOST; |
| 432 | break; |
| 433 | default: |
| 434 | break; |
| 435 | } |
| 436 | |
| 437 | spin_unlock_bh(&sdata->mib_lock); |
| 438 | |
| 439 | skb->dev = sdata->dev; |
| 440 | |
| 441 | sdata->dev->stats.rx_packets++; |
| 442 | sdata->dev->stats.rx_bytes += skb->len; |
| 443 | |
| 444 | switch (mac_cb_type(skb)) { |
| 445 | case IEEE802154_FC_TYPE_DATA: |
| 446 | return mac802154_process_data(sdata->dev, skb); |
| 447 | default: |
| 448 | pr_warning("ieee802154: bad frame received (type = %d)\n", |
| 449 | mac_cb_type(skb)); |
| 450 | kfree_skb(skb); |
| 451 | return NET_RX_DROP; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | static int mac802154_parse_frame_start(struct sk_buff *skb) |
| 456 | { |
| 457 | u8 *head = skb->data; |
| 458 | u16 fc; |
| 459 | |
| 460 | if (mac802154_fetch_skb_u16(skb, &fc) || |
| 461 | mac802154_fetch_skb_u8(skb, &(mac_cb(skb)->seq))) |
| 462 | goto err; |
| 463 | |
| 464 | pr_debug("fc: %04x dsn: %02x\n", fc, head[2]); |
| 465 | |
| 466 | mac_cb(skb)->flags = IEEE802154_FC_TYPE(fc); |
| 467 | mac_cb(skb)->sa.addr_type = IEEE802154_FC_SAMODE(fc); |
| 468 | mac_cb(skb)->da.addr_type = IEEE802154_FC_DAMODE(fc); |
| 469 | |
| 470 | if (fc & IEEE802154_FC_INTRA_PAN) |
| 471 | mac_cb(skb)->flags |= MAC_CB_FLAG_INTRAPAN; |
| 472 | |
| 473 | if (mac_cb(skb)->da.addr_type != IEEE802154_ADDR_NONE) { |
| 474 | if (mac802154_fetch_skb_u16(skb, &(mac_cb(skb)->da.pan_id))) |
| 475 | goto err; |
| 476 | |
| 477 | /* source PAN id compression */ |
| 478 | if (mac_cb_is_intrapan(skb)) |
| 479 | mac_cb(skb)->sa.pan_id = mac_cb(skb)->da.pan_id; |
| 480 | |
| 481 | pr_debug("dest PAN addr: %04x\n", mac_cb(skb)->da.pan_id); |
| 482 | |
| 483 | if (mac_cb(skb)->da.addr_type == IEEE802154_ADDR_SHORT) { |
| 484 | u16 *da = &(mac_cb(skb)->da.short_addr); |
| 485 | |
| 486 | if (mac802154_fetch_skb_u16(skb, da)) |
| 487 | goto err; |
| 488 | |
| 489 | pr_debug("destination address is short: %04x\n", |
| 490 | mac_cb(skb)->da.short_addr); |
| 491 | } else { |
| 492 | if (!pskb_may_pull(skb, IEEE802154_ADDR_LEN)) |
| 493 | goto err; |
| 494 | |
| 495 | mac802154_haddr_copy_swap(mac_cb(skb)->da.hwaddr, |
| 496 | skb->data); |
| 497 | skb_pull(skb, IEEE802154_ADDR_LEN); |
| 498 | |
| 499 | pr_debug("destination address is hardware\n"); |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | if (mac_cb(skb)->sa.addr_type != IEEE802154_ADDR_NONE) { |
| 504 | /* non PAN-compression, fetch source address id */ |
| 505 | if (!(mac_cb_is_intrapan(skb))) { |
| 506 | u16 *sa_pan = &(mac_cb(skb)->sa.pan_id); |
| 507 | |
| 508 | if (mac802154_fetch_skb_u16(skb, sa_pan)) |
| 509 | goto err; |
| 510 | } |
| 511 | |
| 512 | pr_debug("source PAN addr: %04x\n", mac_cb(skb)->da.pan_id); |
| 513 | |
| 514 | if (mac_cb(skb)->sa.addr_type == IEEE802154_ADDR_SHORT) { |
| 515 | u16 *sa = &(mac_cb(skb)->sa.short_addr); |
| 516 | |
| 517 | if (mac802154_fetch_skb_u16(skb, sa)) |
| 518 | goto err; |
| 519 | |
| 520 | pr_debug("source address is short: %04x\n", |
| 521 | mac_cb(skb)->sa.short_addr); |
| 522 | } else { |
| 523 | if (!pskb_may_pull(skb, IEEE802154_ADDR_LEN)) |
| 524 | goto err; |
| 525 | |
| 526 | mac802154_haddr_copy_swap(mac_cb(skb)->sa.hwaddr, |
| 527 | skb->data); |
| 528 | skb_pull(skb, IEEE802154_ADDR_LEN); |
| 529 | |
| 530 | pr_debug("source address is hardware\n"); |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | return 0; |
| 535 | err: |
| 536 | return -EINVAL; |
| 537 | } |
| 538 | |
| 539 | void mac802154_wpans_rx(struct mac802154_priv *priv, struct sk_buff *skb) |
| 540 | { |
| 541 | int ret; |
| 542 | struct sk_buff *sskb; |
| 543 | struct mac802154_sub_if_data *sdata; |
| 544 | |
| 545 | ret = mac802154_parse_frame_start(skb); |
| 546 | if (ret) { |
| 547 | pr_debug("got invalid frame\n"); |
| 548 | return; |
| 549 | } |
| 550 | |
| 551 | rcu_read_lock(); |
| 552 | list_for_each_entry_rcu(sdata, &priv->slaves, list) { |
| 553 | if (sdata->type != IEEE802154_DEV_WPAN) |
| 554 | continue; |
| 555 | |
| 556 | sskb = skb_clone(skb, GFP_ATOMIC); |
| 557 | if (sskb) |
| 558 | mac802154_subif_frame(sdata, sskb); |
| 559 | } |
| 560 | rcu_read_unlock(); |
| 561 | } |