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_hdr_fc {
54 #if defined(__LITTLE_ENDIAN_BITFIELD)
55 u16 type:3,
56 security_enabled:1,
57 frame_pending:1,
58 ack_request:1,
59 intra_pan:1,
60 reserved:3,
61 dest_addr_mode:2,
62 version:2,
63 source_addr_mode:2;
64 #elif defined(__BIG_ENDIAN_BITFIELD)
65 u16 reserved:1,
66 intra_pan:1,
67 ack_request:1,
68 frame_pending:1,
69 security_enabled:1,
70 type:3,
71 source_addr_mode:2,
72 version:2,
73 dest_addr_mode:2,
74 reserved2:2;
75 #else
76 #error "Please fix <asm/byteorder.h>"
77 #endif
78 };
79
80 struct ieee802154_hdr {
81 struct ieee802154_hdr_fc fc;
82 u8 seq;
83 struct ieee802154_addr source;
84 struct ieee802154_addr dest;
85 struct ieee802154_sechdr sec;
86 };
87
88 /* pushes hdr onto the skb. fields of hdr->fc that can be calculated from
89 * the contents of hdr will be, and the actual value of those bits in
90 * hdr->fc will be ignored. this includes the INTRA_PAN bit and the frame
91 * version, if SECEN is set.
92 */
93 int ieee802154_hdr_push(struct sk_buff *skb, struct ieee802154_hdr *hdr);
94
95 /* pulls the entire 802.15.4 header off of the skb, including the security
96 * header, and performs pan id decompression
97 */
98 int ieee802154_hdr_pull(struct sk_buff *skb, struct ieee802154_hdr *hdr);
99
100 /* parses the frame control, sequence number of address fields in a given skb
101 * and stores them into hdr, performing pan id decompression and length checks
102 * to be suitable for use in header_ops.parse
103 */
104 int ieee802154_hdr_peek_addrs(const struct sk_buff *skb,
105 struct ieee802154_hdr *hdr);
106
107 /* parses the full 802.15.4 header a given skb and stores them into hdr,
108 * performing pan id decompression and length checks to be suitable for use in
109 * header_ops.parse
110 */
111 int ieee802154_hdr_peek(const struct sk_buff *skb, struct ieee802154_hdr *hdr);
112
113 int ieee802154_max_payload(const struct ieee802154_hdr *hdr);
114
115 static inline int
ieee802154_sechdr_authtag_len(const struct ieee802154_sechdr * sec)116 ieee802154_sechdr_authtag_len(const struct ieee802154_sechdr *sec)
117 {
118 switch (sec->level) {
119 case IEEE802154_SCF_SECLEVEL_MIC32:
120 case IEEE802154_SCF_SECLEVEL_ENC_MIC32:
121 return 4;
122 case IEEE802154_SCF_SECLEVEL_MIC64:
123 case IEEE802154_SCF_SECLEVEL_ENC_MIC64:
124 return 8;
125 case IEEE802154_SCF_SECLEVEL_MIC128:
126 case IEEE802154_SCF_SECLEVEL_ENC_MIC128:
127 return 16;
128 case IEEE802154_SCF_SECLEVEL_NONE:
129 case IEEE802154_SCF_SECLEVEL_ENC:
130 default:
131 return 0;
132 }
133 }
134
ieee802154_hdr_length(struct sk_buff * skb)135 static inline int ieee802154_hdr_length(struct sk_buff *skb)
136 {
137 struct ieee802154_hdr hdr;
138 int len = ieee802154_hdr_pull(skb, &hdr);
139
140 if (len > 0)
141 skb_push(skb, len);
142
143 return len;
144 }
145
ieee802154_addr_equal(const struct ieee802154_addr * a1,const struct ieee802154_addr * a2)146 static inline bool ieee802154_addr_equal(const struct ieee802154_addr *a1,
147 const struct ieee802154_addr *a2)
148 {
149 if (a1->pan_id != a2->pan_id || a1->mode != a2->mode)
150 return false;
151
152 if ((a1->mode == IEEE802154_ADDR_LONG &&
153 a1->extended_addr != a2->extended_addr) ||
154 (a1->mode == IEEE802154_ADDR_SHORT &&
155 a1->short_addr != a2->short_addr))
156 return false;
157
158 return true;
159 }
160
ieee802154_devaddr_from_raw(const void * raw)161 static inline __le64 ieee802154_devaddr_from_raw(const void *raw)
162 {
163 u64 temp;
164
165 memcpy(&temp, raw, IEEE802154_ADDR_LEN);
166 return (__force __le64)swab64(temp);
167 }
168
ieee802154_devaddr_to_raw(void * raw,__le64 addr)169 static inline void ieee802154_devaddr_to_raw(void *raw, __le64 addr)
170 {
171 u64 temp = swab64((__force u64)addr);
172
173 memcpy(raw, &temp, IEEE802154_ADDR_LEN);
174 }
175
ieee802154_addr_from_sa(struct ieee802154_addr * a,const struct ieee802154_addr_sa * sa)176 static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a,
177 const struct ieee802154_addr_sa *sa)
178 {
179 a->mode = sa->addr_type;
180 a->pan_id = cpu_to_le16(sa->pan_id);
181
182 switch (a->mode) {
183 case IEEE802154_ADDR_SHORT:
184 a->short_addr = cpu_to_le16(sa->short_addr);
185 break;
186 case IEEE802154_ADDR_LONG:
187 a->extended_addr = ieee802154_devaddr_from_raw(sa->hwaddr);
188 break;
189 }
190 }
191
ieee802154_addr_to_sa(struct ieee802154_addr_sa * sa,const struct ieee802154_addr * a)192 static inline void ieee802154_addr_to_sa(struct ieee802154_addr_sa *sa,
193 const struct ieee802154_addr *a)
194 {
195 sa->addr_type = a->mode;
196 sa->pan_id = le16_to_cpu(a->pan_id);
197
198 switch (a->mode) {
199 case IEEE802154_ADDR_SHORT:
200 sa->short_addr = le16_to_cpu(a->short_addr);
201 break;
202 case IEEE802154_ADDR_LONG:
203 ieee802154_devaddr_to_raw(sa->hwaddr, a->extended_addr);
204 break;
205 }
206 }
207
208 /*
209 * A control block of skb passed between the ARPHRD_IEEE802154 device
210 * and other stack parts.
211 */
212 struct ieee802154_mac_cb {
213 u8 lqi;
214 u8 type;
215 bool ackreq;
216 bool secen;
217 bool secen_override;
218 u8 seclevel;
219 bool seclevel_override;
220 struct ieee802154_addr source;
221 struct ieee802154_addr dest;
222 };
223
mac_cb(struct sk_buff * skb)224 static inline struct ieee802154_mac_cb *mac_cb(struct sk_buff *skb)
225 {
226 return (struct ieee802154_mac_cb *)skb->cb;
227 }
228
mac_cb_init(struct sk_buff * skb)229 static inline struct ieee802154_mac_cb *mac_cb_init(struct sk_buff *skb)
230 {
231 BUILD_BUG_ON(sizeof(struct ieee802154_mac_cb) > sizeof(skb->cb));
232
233 memset(skb->cb, 0, sizeof(struct ieee802154_mac_cb));
234 return mac_cb(skb);
235 }
236
237 enum {
238 IEEE802154_LLSEC_DEVKEY_IGNORE,
239 IEEE802154_LLSEC_DEVKEY_RESTRICT,
240 IEEE802154_LLSEC_DEVKEY_RECORD,
241
242 __IEEE802154_LLSEC_DEVKEY_MAX,
243 };
244
245 #define IEEE802154_MAC_SCAN_ED 0
246 #define IEEE802154_MAC_SCAN_ACTIVE 1
247 #define IEEE802154_MAC_SCAN_PASSIVE 2
248 #define IEEE802154_MAC_SCAN_ORPHAN 3
249
250 struct ieee802154_mac_params {
251 s8 transmit_power;
252 u8 min_be;
253 u8 max_be;
254 u8 csma_retries;
255 s8 frame_retries;
256
257 bool lbt;
258 struct wpan_phy_cca cca;
259 s32 cca_ed_level;
260 };
261
262 struct wpan_phy;
263
264 enum {
265 IEEE802154_LLSEC_PARAM_ENABLED = BIT(0),
266 IEEE802154_LLSEC_PARAM_FRAME_COUNTER = BIT(1),
267 IEEE802154_LLSEC_PARAM_OUT_LEVEL = BIT(2),
268 IEEE802154_LLSEC_PARAM_OUT_KEY = BIT(3),
269 IEEE802154_LLSEC_PARAM_KEY_SOURCE = BIT(4),
270 IEEE802154_LLSEC_PARAM_PAN_ID = BIT(5),
271 IEEE802154_LLSEC_PARAM_HWADDR = BIT(6),
272 IEEE802154_LLSEC_PARAM_COORD_HWADDR = BIT(7),
273 IEEE802154_LLSEC_PARAM_COORD_SHORTADDR = BIT(8),
274 };
275
276 struct ieee802154_llsec_ops {
277 int (*get_params)(struct net_device *dev,
278 struct ieee802154_llsec_params *params);
279 int (*set_params)(struct net_device *dev,
280 const struct ieee802154_llsec_params *params,
281 int changed);
282
283 int (*add_key)(struct net_device *dev,
284 const struct ieee802154_llsec_key_id *id,
285 const struct ieee802154_llsec_key *key);
286 int (*del_key)(struct net_device *dev,
287 const struct ieee802154_llsec_key_id *id);
288
289 int (*add_dev)(struct net_device *dev,
290 const struct ieee802154_llsec_device *llsec_dev);
291 int (*del_dev)(struct net_device *dev, __le64 dev_addr);
292
293 int (*add_devkey)(struct net_device *dev,
294 __le64 device_addr,
295 const struct ieee802154_llsec_device_key *key);
296 int (*del_devkey)(struct net_device *dev,
297 __le64 device_addr,
298 const struct ieee802154_llsec_device_key *key);
299
300 int (*add_seclevel)(struct net_device *dev,
301 const struct ieee802154_llsec_seclevel *sl);
302 int (*del_seclevel)(struct net_device *dev,
303 const struct ieee802154_llsec_seclevel *sl);
304
305 void (*lock_table)(struct net_device *dev);
306 void (*get_table)(struct net_device *dev,
307 struct ieee802154_llsec_table **t);
308 void (*unlock_table)(struct net_device *dev);
309 };
310 /*
311 * This should be located at net_device->ml_priv
312 *
313 * get_phy should increment the reference counting on returned phy.
314 * Use wpan_wpy_put to put that reference.
315 */
316 struct ieee802154_mlme_ops {
317 /* The following fields are optional (can be NULL). */
318
319 int (*assoc_req)(struct net_device *dev,
320 struct ieee802154_addr *addr,
321 u8 channel, u8 page, u8 cap);
322 int (*assoc_resp)(struct net_device *dev,
323 struct ieee802154_addr *addr,
324 __le16 short_addr, u8 status);
325 int (*disassoc_req)(struct net_device *dev,
326 struct ieee802154_addr *addr,
327 u8 reason);
328 int (*start_req)(struct net_device *dev,
329 struct ieee802154_addr *addr,
330 u8 channel, u8 page, u8 bcn_ord, u8 sf_ord,
331 u8 pan_coord, u8 blx, u8 coord_realign);
332 int (*scan_req)(struct net_device *dev,
333 u8 type, u32 channels, u8 page, u8 duration);
334
335 int (*set_mac_params)(struct net_device *dev,
336 const struct ieee802154_mac_params *params);
337 void (*get_mac_params)(struct net_device *dev,
338 struct ieee802154_mac_params *params);
339
340 const struct ieee802154_llsec_ops *llsec;
341 };
342
343 static inline struct ieee802154_mlme_ops *
ieee802154_mlme_ops(const struct net_device * dev)344 ieee802154_mlme_ops(const struct net_device *dev)
345 {
346 return dev->ml_priv;
347 }
348
349 #endif
350
