1 /* 2 * An interface between IEEE802.15.4 device and rest of the kernel. 3 * 4 * Copyright (C) 2007-2012 Siemens AG 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 8 * as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * Written by: 16 * Pavel Smolenskiy <pavel.smolenskiy@gmail.com> 17 * Maxim Gorbachyov <maxim.gorbachev@siemens.com> 18 * Maxim Osipov <maxim.osipov@siemens.com> 19 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> 20 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> 21 */ 22 23 #ifndef IEEE802154_NETDEVICE_H 24 #define IEEE802154_NETDEVICE_H 25 26 #include <net/af_ieee802154.h> 27 #include <linux/netdevice.h> 28 #include <linux/skbuff.h> 29 #include <linux/ieee802154.h> 30 31 #include <net/cfg802154.h> 32 33 struct ieee802154_sechdr { 34 #if defined(__LITTLE_ENDIAN_BITFIELD) 35 u8 level:3, 36 key_id_mode:2, 37 reserved:3; 38 #elif defined(__BIG_ENDIAN_BITFIELD) 39 u8 reserved:3, 40 key_id_mode:2, 41 level:3; 42 #else 43 #error "Please fix <asm/byteorder.h>" 44 #endif 45 u8 key_id; 46 __le32 frame_counter; 47 union { 48 __le32 short_src; 49 __le64 extended_src; 50 }; 51 }; 52 53 struct ieee802154_addr { 54 u8 mode; 55 __le16 pan_id; 56 union { 57 __le16 short_addr; 58 __le64 extended_addr; 59 }; 60 }; 61 62 struct ieee802154_hdr_fc { 63 #if defined(__LITTLE_ENDIAN_BITFIELD) 64 u16 type:3, 65 security_enabled:1, 66 frame_pending:1, 67 ack_request:1, 68 intra_pan:1, 69 reserved:3, 70 dest_addr_mode:2, 71 version:2, 72 source_addr_mode:2; 73 #elif defined(__BIG_ENDIAN_BITFIELD) 74 u16 reserved:1, 75 intra_pan:1, 76 ack_request:1, 77 frame_pending:1, 78 security_enabled:1, 79 type:3, 80 source_addr_mode:2, 81 version:2, 82 dest_addr_mode:2, 83 reserved2:2; 84 #else 85 #error "Please fix <asm/byteorder.h>" 86 #endif 87 }; 88 89 struct ieee802154_hdr { 90 struct ieee802154_hdr_fc fc; 91 u8 seq; 92 struct ieee802154_addr source; 93 struct ieee802154_addr dest; 94 struct ieee802154_sechdr sec; 95 }; 96 97 /* pushes hdr onto the skb. fields of hdr->fc that can be calculated from 98 * the contents of hdr will be, and the actual value of those bits in 99 * hdr->fc will be ignored. this includes the INTRA_PAN bit and the frame 100 * version, if SECEN is set. 101 */ 102 int ieee802154_hdr_push(struct sk_buff *skb, const struct ieee802154_hdr *hdr); 103 104 /* pulls the entire 802.15.4 header off of the skb, including the security 105 * header, and performs pan id decompression 106 */ 107 int ieee802154_hdr_pull(struct sk_buff *skb, struct ieee802154_hdr *hdr); 108 109 /* parses the frame control, sequence number of address fields in a given skb 110 * and stores them into hdr, performing pan id decompression and length checks 111 * to be suitable for use in header_ops.parse 112 */ 113 int ieee802154_hdr_peek_addrs(const struct sk_buff *skb, 114 struct ieee802154_hdr *hdr); 115 116 /* parses the full 802.15.4 header a given skb and stores them into hdr, 117 * performing pan id decompression and length checks to be suitable for use in 118 * header_ops.parse 119 */ 120 int ieee802154_hdr_peek(const struct sk_buff *skb, struct ieee802154_hdr *hdr); 121 122 int ieee802154_max_payload(const struct ieee802154_hdr *hdr); 123 124 static inline int 125 ieee802154_sechdr_authtag_len(const struct ieee802154_sechdr *sec) 126 { 127 switch (sec->level) { 128 case IEEE802154_SCF_SECLEVEL_MIC32: 129 case IEEE802154_SCF_SECLEVEL_ENC_MIC32: 130 return 4; 131 case IEEE802154_SCF_SECLEVEL_MIC64: 132 case IEEE802154_SCF_SECLEVEL_ENC_MIC64: 133 return 8; 134 case IEEE802154_SCF_SECLEVEL_MIC128: 135 case IEEE802154_SCF_SECLEVEL_ENC_MIC128: 136 return 16; 137 case IEEE802154_SCF_SECLEVEL_NONE: 138 case IEEE802154_SCF_SECLEVEL_ENC: 139 default: 140 return 0; 141 } 142 } 143 144 static inline int ieee802154_hdr_length(struct sk_buff *skb) 145 { 146 struct ieee802154_hdr hdr; 147 int len = ieee802154_hdr_pull(skb, &hdr); 148 149 if (len > 0) 150 skb_push(skb, len); 151 152 return len; 153 } 154 155 static inline bool ieee802154_addr_equal(const struct ieee802154_addr *a1, 156 const struct ieee802154_addr *a2) 157 { 158 if (a1->pan_id != a2->pan_id || a1->mode != a2->mode) 159 return false; 160 161 if ((a1->mode == IEEE802154_ADDR_LONG && 162 a1->extended_addr != a2->extended_addr) || 163 (a1->mode == IEEE802154_ADDR_SHORT && 164 a1->short_addr != a2->short_addr)) 165 return false; 166 167 return true; 168 } 169 170 static inline __le64 ieee802154_devaddr_from_raw(const void *raw) 171 { 172 u64 temp; 173 174 memcpy(&temp, raw, IEEE802154_ADDR_LEN); 175 return (__force __le64)swab64(temp); 176 } 177 178 static inline void ieee802154_devaddr_to_raw(void *raw, __le64 addr) 179 { 180 u64 temp = swab64((__force u64)addr); 181 182 memcpy(raw, &temp, IEEE802154_ADDR_LEN); 183 } 184 185 static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a, 186 const struct ieee802154_addr_sa *sa) 187 { 188 a->mode = sa->addr_type; 189 a->pan_id = cpu_to_le16(sa->pan_id); 190 191 switch (a->mode) { 192 case IEEE802154_ADDR_SHORT: 193 a->short_addr = cpu_to_le16(sa->short_addr); 194 break; 195 case IEEE802154_ADDR_LONG: 196 a->extended_addr = ieee802154_devaddr_from_raw(sa->hwaddr); 197 break; 198 } 199 } 200 201 static inline void ieee802154_addr_to_sa(struct ieee802154_addr_sa *sa, 202 const struct ieee802154_addr *a) 203 { 204 sa->addr_type = a->mode; 205 sa->pan_id = le16_to_cpu(a->pan_id); 206 207 switch (a->mode) { 208 case IEEE802154_ADDR_SHORT: 209 sa->short_addr = le16_to_cpu(a->short_addr); 210 break; 211 case IEEE802154_ADDR_LONG: 212 ieee802154_devaddr_to_raw(sa->hwaddr, a->extended_addr); 213 break; 214 } 215 } 216 217 /* 218 * A control block of skb passed between the ARPHRD_IEEE802154 device 219 * and other stack parts. 220 */ 221 struct ieee802154_mac_cb { 222 u8 lqi; 223 u8 type; 224 bool ackreq; 225 bool secen; 226 bool secen_override; 227 u8 seclevel; 228 bool seclevel_override; 229 struct ieee802154_addr source; 230 struct ieee802154_addr dest; 231 }; 232 233 static inline struct ieee802154_mac_cb *mac_cb(struct sk_buff *skb) 234 { 235 return (struct ieee802154_mac_cb *)skb->cb; 236 } 237 238 static inline struct ieee802154_mac_cb *mac_cb_init(struct sk_buff *skb) 239 { 240 BUILD_BUG_ON(sizeof(struct ieee802154_mac_cb) > sizeof(skb->cb)); 241 242 memset(skb->cb, 0, sizeof(struct ieee802154_mac_cb)); 243 return mac_cb(skb); 244 } 245 246 #define IEEE802154_LLSEC_KEY_SIZE 16 247 248 struct ieee802154_llsec_key_id { 249 u8 mode; 250 u8 id; 251 union { 252 struct ieee802154_addr device_addr; 253 __le32 short_source; 254 __le64 extended_source; 255 }; 256 }; 257 258 struct ieee802154_llsec_key { 259 u8 frame_types; 260 u32 cmd_frame_ids; 261 u8 key[IEEE802154_LLSEC_KEY_SIZE]; 262 }; 263 264 struct ieee802154_llsec_key_entry { 265 struct list_head list; 266 267 struct ieee802154_llsec_key_id id; 268 struct ieee802154_llsec_key *key; 269 }; 270 271 struct ieee802154_llsec_device_key { 272 struct list_head list; 273 274 struct ieee802154_llsec_key_id key_id; 275 u32 frame_counter; 276 }; 277 278 enum { 279 IEEE802154_LLSEC_DEVKEY_IGNORE, 280 IEEE802154_LLSEC_DEVKEY_RESTRICT, 281 IEEE802154_LLSEC_DEVKEY_RECORD, 282 283 __IEEE802154_LLSEC_DEVKEY_MAX, 284 }; 285 286 struct ieee802154_llsec_device { 287 struct list_head list; 288 289 __le16 pan_id; 290 __le16 short_addr; 291 __le64 hwaddr; 292 u32 frame_counter; 293 bool seclevel_exempt; 294 295 u8 key_mode; 296 struct list_head keys; 297 }; 298 299 struct ieee802154_llsec_seclevel { 300 struct list_head list; 301 302 u8 frame_type; 303 u8 cmd_frame_id; 304 bool device_override; 305 u32 sec_levels; 306 }; 307 308 struct ieee802154_llsec_params { 309 bool enabled; 310 311 __be32 frame_counter; 312 u8 out_level; 313 struct ieee802154_llsec_key_id out_key; 314 315 __le64 default_key_source; 316 317 __le16 pan_id; 318 __le64 hwaddr; 319 __le64 coord_hwaddr; 320 __le16 coord_shortaddr; 321 }; 322 323 struct ieee802154_llsec_table { 324 struct list_head keys; 325 struct list_head devices; 326 struct list_head security_levels; 327 }; 328 329 #define IEEE802154_MAC_SCAN_ED 0 330 #define IEEE802154_MAC_SCAN_ACTIVE 1 331 #define IEEE802154_MAC_SCAN_PASSIVE 2 332 #define IEEE802154_MAC_SCAN_ORPHAN 3 333 334 struct ieee802154_mac_params { 335 s8 transmit_power; 336 u8 min_be; 337 u8 max_be; 338 u8 csma_retries; 339 s8 frame_retries; 340 341 bool lbt; 342 struct wpan_phy_cca cca; 343 s32 cca_ed_level; 344 }; 345 346 struct wpan_phy; 347 348 enum { 349 IEEE802154_LLSEC_PARAM_ENABLED = BIT(0), 350 IEEE802154_LLSEC_PARAM_FRAME_COUNTER = BIT(1), 351 IEEE802154_LLSEC_PARAM_OUT_LEVEL = BIT(2), 352 IEEE802154_LLSEC_PARAM_OUT_KEY = BIT(3), 353 IEEE802154_LLSEC_PARAM_KEY_SOURCE = BIT(4), 354 IEEE802154_LLSEC_PARAM_PAN_ID = BIT(5), 355 IEEE802154_LLSEC_PARAM_HWADDR = BIT(6), 356 IEEE802154_LLSEC_PARAM_COORD_HWADDR = BIT(7), 357 IEEE802154_LLSEC_PARAM_COORD_SHORTADDR = BIT(8), 358 }; 359 360 struct ieee802154_llsec_ops { 361 int (*get_params)(struct net_device *dev, 362 struct ieee802154_llsec_params *params); 363 int (*set_params)(struct net_device *dev, 364 const struct ieee802154_llsec_params *params, 365 int changed); 366 367 int (*add_key)(struct net_device *dev, 368 const struct ieee802154_llsec_key_id *id, 369 const struct ieee802154_llsec_key *key); 370 int (*del_key)(struct net_device *dev, 371 const struct ieee802154_llsec_key_id *id); 372 373 int (*add_dev)(struct net_device *dev, 374 const struct ieee802154_llsec_device *llsec_dev); 375 int (*del_dev)(struct net_device *dev, __le64 dev_addr); 376 377 int (*add_devkey)(struct net_device *dev, 378 __le64 device_addr, 379 const struct ieee802154_llsec_device_key *key); 380 int (*del_devkey)(struct net_device *dev, 381 __le64 device_addr, 382 const struct ieee802154_llsec_device_key *key); 383 384 int (*add_seclevel)(struct net_device *dev, 385 const struct ieee802154_llsec_seclevel *sl); 386 int (*del_seclevel)(struct net_device *dev, 387 const struct ieee802154_llsec_seclevel *sl); 388 389 void (*lock_table)(struct net_device *dev); 390 void (*get_table)(struct net_device *dev, 391 struct ieee802154_llsec_table **t); 392 void (*unlock_table)(struct net_device *dev); 393 }; 394 /* 395 * This should be located at net_device->ml_priv 396 * 397 * get_phy should increment the reference counting on returned phy. 398 * Use wpan_wpy_put to put that reference. 399 */ 400 struct ieee802154_mlme_ops { 401 /* The following fields are optional (can be NULL). */ 402 403 int (*assoc_req)(struct net_device *dev, 404 struct ieee802154_addr *addr, 405 u8 channel, u8 page, u8 cap); 406 int (*assoc_resp)(struct net_device *dev, 407 struct ieee802154_addr *addr, 408 __le16 short_addr, u8 status); 409 int (*disassoc_req)(struct net_device *dev, 410 struct ieee802154_addr *addr, 411 u8 reason); 412 int (*start_req)(struct net_device *dev, 413 struct ieee802154_addr *addr, 414 u8 channel, u8 page, u8 bcn_ord, u8 sf_ord, 415 u8 pan_coord, u8 blx, u8 coord_realign); 416 int (*scan_req)(struct net_device *dev, 417 u8 type, u32 channels, u8 page, u8 duration); 418 419 int (*set_mac_params)(struct net_device *dev, 420 const struct ieee802154_mac_params *params); 421 void (*get_mac_params)(struct net_device *dev, 422 struct ieee802154_mac_params *params); 423 424 struct ieee802154_llsec_ops *llsec; 425 }; 426 427 static inline struct ieee802154_mlme_ops * 428 ieee802154_mlme_ops(const struct net_device *dev) 429 { 430 return dev->ml_priv; 431 } 432 433 #endif 434