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Linux/include/net/ieee802154_netdev.h

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  1 /* SPDX-License-Identifier: GPL-2.0-only */
  2 /*
  3  * An interface between IEEE802.15.4 device and rest of the kernel.
  4  *
  5  * Copyright (C) 2007-2012 Siemens AG
  6  *
  7  * Written by:
  8  * Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
  9  * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
 10  * Maxim Osipov <maxim.osipov@siemens.com>
 11  * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 12  * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
 13  */
 14 
 15 #ifndef IEEE802154_NETDEVICE_H
 16 #define IEEE802154_NETDEVICE_H
 17 
 18 #include <net/af_ieee802154.h>
 19 #include <linux/netdevice.h>
 20 #include <linux/skbuff.h>
 21 #include <linux/ieee802154.h>
 22 
 23 #include <net/cfg802154.h>
 24 
 25 struct ieee802154_sechdr {
 26 #if defined(__LITTLE_ENDIAN_BITFIELD)
 27         u8 level:3,
 28            key_id_mode:2,
 29            reserved:3;
 30 #elif defined(__BIG_ENDIAN_BITFIELD)
 31         u8 reserved:3,
 32            key_id_mode:2,
 33            level:3;
 34 #else
 35 #error  "Please fix <asm/byteorder.h>"
 36 #endif
 37         u8 key_id;
 38         __le32 frame_counter;
 39         union {
 40                 __le32 short_src;
 41                 __le64 extended_src;
 42         };
 43 };
 44 
 45 struct ieee802154_hdr_fc {
 46 #if defined(__LITTLE_ENDIAN_BITFIELD)
 47         u16 type:3,
 48             security_enabled:1,
 49             frame_pending:1,
 50             ack_request:1,
 51             intra_pan:1,
 52             reserved:3,
 53             dest_addr_mode:2,
 54             version:2,
 55             source_addr_mode:2;
 56 #elif defined(__BIG_ENDIAN_BITFIELD)
 57         u16 reserved:1,
 58             intra_pan:1,
 59             ack_request:1,
 60             frame_pending:1,
 61             security_enabled:1,
 62             type:3,
 63             source_addr_mode:2,
 64             version:2,
 65             dest_addr_mode:2,
 66             reserved2:2;
 67 #else
 68 #error  "Please fix <asm/byteorder.h>"
 69 #endif
 70 };
 71 
 72 struct ieee802154_hdr {
 73         struct ieee802154_hdr_fc fc;
 74         u8 seq;
 75         struct ieee802154_addr source;
 76         struct ieee802154_addr dest;
 77         struct ieee802154_sechdr sec;
 78 };
 79 
 80 /* pushes hdr onto the skb. fields of hdr->fc that can be calculated from
 81  * the contents of hdr will be, and the actual value of those bits in
 82  * hdr->fc will be ignored. this includes the INTRA_PAN bit and the frame
 83  * version, if SECEN is set.
 84  */
 85 int ieee802154_hdr_push(struct sk_buff *skb, struct ieee802154_hdr *hdr);
 86 
 87 /* pulls the entire 802.15.4 header off of the skb, including the security
 88  * header, and performs pan id decompression
 89  */
 90 int ieee802154_hdr_pull(struct sk_buff *skb, struct ieee802154_hdr *hdr);
 91 
 92 /* parses the frame control, sequence number of address fields in a given skb
 93  * and stores them into hdr, performing pan id decompression and length checks
 94  * to be suitable for use in header_ops.parse
 95  */
 96 int ieee802154_hdr_peek_addrs(const struct sk_buff *skb,
 97                               struct ieee802154_hdr *hdr);
 98 
 99 /* parses the full 802.15.4 header a given skb and stores them into hdr,
100  * performing pan id decompression and length checks to be suitable for use in
101  * header_ops.parse
102  */
103 int ieee802154_hdr_peek(const struct sk_buff *skb, struct ieee802154_hdr *hdr);
104 
105 int ieee802154_max_payload(const struct ieee802154_hdr *hdr);
106 
107 static inline int
108 ieee802154_sechdr_authtag_len(const struct ieee802154_sechdr *sec)
109 {
110         switch (sec->level) {
111         case IEEE802154_SCF_SECLEVEL_MIC32:
112         case IEEE802154_SCF_SECLEVEL_ENC_MIC32:
113                 return 4;
114         case IEEE802154_SCF_SECLEVEL_MIC64:
115         case IEEE802154_SCF_SECLEVEL_ENC_MIC64:
116                 return 8;
117         case IEEE802154_SCF_SECLEVEL_MIC128:
118         case IEEE802154_SCF_SECLEVEL_ENC_MIC128:
119                 return 16;
120         case IEEE802154_SCF_SECLEVEL_NONE:
121         case IEEE802154_SCF_SECLEVEL_ENC:
122         default:
123                 return 0;
124         }
125 }
126 
127 static inline int ieee802154_hdr_length(struct sk_buff *skb)
128 {
129         struct ieee802154_hdr hdr;
130         int len = ieee802154_hdr_pull(skb, &hdr);
131 
132         if (len > 0)
133                 skb_push(skb, len);
134 
135         return len;
136 }
137 
138 static inline bool ieee802154_addr_equal(const struct ieee802154_addr *a1,
139                                          const struct ieee802154_addr *a2)
140 {
141         if (a1->pan_id != a2->pan_id || a1->mode != a2->mode)
142                 return false;
143 
144         if ((a1->mode == IEEE802154_ADDR_LONG &&
145              a1->extended_addr != a2->extended_addr) ||
146             (a1->mode == IEEE802154_ADDR_SHORT &&
147              a1->short_addr != a2->short_addr))
148                 return false;
149 
150         return true;
151 }
152 
153 static inline __le64 ieee802154_devaddr_from_raw(const void *raw)
154 {
155         u64 temp;
156 
157         memcpy(&temp, raw, IEEE802154_ADDR_LEN);
158         return (__force __le64)swab64(temp);
159 }
160 
161 static inline void ieee802154_devaddr_to_raw(void *raw, __le64 addr)
162 {
163         u64 temp = swab64((__force u64)addr);
164 
165         memcpy(raw, &temp, IEEE802154_ADDR_LEN);
166 }
167 
168 static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a,
169                                            const struct ieee802154_addr_sa *sa)
170 {
171         a->mode = sa->addr_type;
172         a->pan_id = cpu_to_le16(sa->pan_id);
173 
174         switch (a->mode) {
175         case IEEE802154_ADDR_SHORT:
176                 a->short_addr = cpu_to_le16(sa->short_addr);
177                 break;
178         case IEEE802154_ADDR_LONG:
179                 a->extended_addr = ieee802154_devaddr_from_raw(sa->hwaddr);
180                 break;
181         }
182 }
183 
184 static inline void ieee802154_addr_to_sa(struct ieee802154_addr_sa *sa,
185                                          const struct ieee802154_addr *a)
186 {
187         sa->addr_type = a->mode;
188         sa->pan_id = le16_to_cpu(a->pan_id);
189 
190         switch (a->mode) {
191         case IEEE802154_ADDR_SHORT:
192                 sa->short_addr = le16_to_cpu(a->short_addr);
193                 break;
194         case IEEE802154_ADDR_LONG:
195                 ieee802154_devaddr_to_raw(sa->hwaddr, a->extended_addr);
196                 break;
197         }
198 }
199 
200 /*
201  * A control block of skb passed between the ARPHRD_IEEE802154 device
202  * and other stack parts.
203  */
204 struct ieee802154_mac_cb {
205         u8 lqi;
206         u8 type;
207         bool ackreq;
208         bool secen;
209         bool secen_override;
210         u8 seclevel;
211         bool seclevel_override;
212         struct ieee802154_addr source;
213         struct ieee802154_addr dest;
214 };
215 
216 static inline struct ieee802154_mac_cb *mac_cb(struct sk_buff *skb)
217 {
218         return (struct ieee802154_mac_cb *)skb->cb;
219 }
220 
221 static inline struct ieee802154_mac_cb *mac_cb_init(struct sk_buff *skb)
222 {
223         BUILD_BUG_ON(sizeof(struct ieee802154_mac_cb) > sizeof(skb->cb));
224 
225         memset(skb->cb, 0, sizeof(struct ieee802154_mac_cb));
226         return mac_cb(skb);
227 }
228 
229 enum {
230         IEEE802154_LLSEC_DEVKEY_IGNORE,
231         IEEE802154_LLSEC_DEVKEY_RESTRICT,
232         IEEE802154_LLSEC_DEVKEY_RECORD,
233 
234         __IEEE802154_LLSEC_DEVKEY_MAX,
235 };
236 
237 #define IEEE802154_MAC_SCAN_ED          0
238 #define IEEE802154_MAC_SCAN_ACTIVE      1
239 #define IEEE802154_MAC_SCAN_PASSIVE     2
240 #define IEEE802154_MAC_SCAN_ORPHAN      3
241 
242 struct ieee802154_mac_params {
243         s8 transmit_power;
244         u8 min_be;
245         u8 max_be;
246         u8 csma_retries;
247         s8 frame_retries;
248 
249         bool lbt;
250         struct wpan_phy_cca cca;
251         s32 cca_ed_level;
252 };
253 
254 struct wpan_phy;
255 
256 enum {
257         IEEE802154_LLSEC_PARAM_ENABLED          = BIT(0),
258         IEEE802154_LLSEC_PARAM_FRAME_COUNTER    = BIT(1),
259         IEEE802154_LLSEC_PARAM_OUT_LEVEL        = BIT(2),
260         IEEE802154_LLSEC_PARAM_OUT_KEY          = BIT(3),
261         IEEE802154_LLSEC_PARAM_KEY_SOURCE       = BIT(4),
262         IEEE802154_LLSEC_PARAM_PAN_ID           = BIT(5),
263         IEEE802154_LLSEC_PARAM_HWADDR           = BIT(6),
264         IEEE802154_LLSEC_PARAM_COORD_HWADDR     = BIT(7),
265         IEEE802154_LLSEC_PARAM_COORD_SHORTADDR  = BIT(8),
266 };
267 
268 struct ieee802154_llsec_ops {
269         int (*get_params)(struct net_device *dev,
270                           struct ieee802154_llsec_params *params);
271         int (*set_params)(struct net_device *dev,
272                           const struct ieee802154_llsec_params *params,
273                           int changed);
274 
275         int (*add_key)(struct net_device *dev,
276                        const struct ieee802154_llsec_key_id *id,
277                        const struct ieee802154_llsec_key *key);
278         int (*del_key)(struct net_device *dev,
279                        const struct ieee802154_llsec_key_id *id);
280 
281         int (*add_dev)(struct net_device *dev,
282                        const struct ieee802154_llsec_device *llsec_dev);
283         int (*del_dev)(struct net_device *dev, __le64 dev_addr);
284 
285         int (*add_devkey)(struct net_device *dev,
286                           __le64 device_addr,
287                           const struct ieee802154_llsec_device_key *key);
288         int (*del_devkey)(struct net_device *dev,
289                           __le64 device_addr,
290                           const struct ieee802154_llsec_device_key *key);
291 
292         int (*add_seclevel)(struct net_device *dev,
293                             const struct ieee802154_llsec_seclevel *sl);
294         int (*del_seclevel)(struct net_device *dev,
295                             const struct ieee802154_llsec_seclevel *sl);
296 
297         void (*lock_table)(struct net_device *dev);
298         void (*get_table)(struct net_device *dev,
299                           struct ieee802154_llsec_table **t);
300         void (*unlock_table)(struct net_device *dev);
301 };
302 /*
303  * This should be located at net_device->ml_priv
304  *
305  * get_phy should increment the reference counting on returned phy.
306  * Use wpan_wpy_put to put that reference.
307  */
308 struct ieee802154_mlme_ops {
309         /* The following fields are optional (can be NULL). */
310 
311         int (*assoc_req)(struct net_device *dev,
312                         struct ieee802154_addr *addr,
313                         u8 channel, u8 page, u8 cap);
314         int (*assoc_resp)(struct net_device *dev,
315                         struct ieee802154_addr *addr,
316                         __le16 short_addr, u8 status);
317         int (*disassoc_req)(struct net_device *dev,
318                         struct ieee802154_addr *addr,
319                         u8 reason);
320         int (*start_req)(struct net_device *dev,
321                         struct ieee802154_addr *addr,
322                         u8 channel, u8 page, u8 bcn_ord, u8 sf_ord,
323                         u8 pan_coord, u8 blx, u8 coord_realign);
324         int (*scan_req)(struct net_device *dev,
325                         u8 type, u32 channels, u8 page, u8 duration);
326 
327         int (*set_mac_params)(struct net_device *dev,
328                               const struct ieee802154_mac_params *params);
329         void (*get_mac_params)(struct net_device *dev,
330                                struct ieee802154_mac_params *params);
331 
332         const struct ieee802154_llsec_ops *llsec;
333 };
334 
335 static inline struct ieee802154_mlme_ops *
336 ieee802154_mlme_ops(const struct net_device *dev)
337 {
338         return dev->ml_priv;
339 }
340 
341 #endif
342 

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