Loading...
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
33struct 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
53struct 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
80struct 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 */
93int 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 */
98int 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 */
104int 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 */
111int ieee802154_hdr_peek(const struct sk_buff *skb, struct ieee802154_hdr *hdr);
112
113int ieee802154_max_payload(const struct ieee802154_hdr *hdr);
114
115static inline int
116ieee802154_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
135static 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
146static 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
161static 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
169static 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
176static 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
192static 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 */
212struct 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
224static inline struct ieee802154_mac_cb *mac_cb(struct sk_buff *skb)
225{
226 return (struct ieee802154_mac_cb *)skb->cb;
227}
228
229static 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
237enum {
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
250struct 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
262struct wpan_phy;
263
264enum {
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
276struct 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 */
316struct 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
343static inline struct ieee802154_mlme_ops *
344ieee802154_mlme_ops(const struct net_device *dev)
345{
346 return dev->ml_priv;
347}
348
349#endif
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 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Written by:
20 * Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
21 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
22 * Maxim Osipov <maxim.osipov@siemens.com>
23 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
24 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
25 */
26
27#ifndef IEEE802154_NETDEVICE_H
28#define IEEE802154_NETDEVICE_H
29
30#include <net/af_ieee802154.h>
31#include <linux/netdevice.h>
32#include <linux/skbuff.h>
33
34struct ieee802154_sechdr {
35#if defined(__LITTLE_ENDIAN_BITFIELD)
36 u8 level:3,
37 key_id_mode:2,
38 reserved:3;
39#elif defined(__BIG_ENDIAN_BITFIELD)
40 u8 reserved:3,
41 key_id_mode:2,
42 level:3;
43#else
44#error "Please fix <asm/byteorder.h>"
45#endif
46 u8 key_id;
47 __le32 frame_counter;
48 union {
49 __le32 short_src;
50 __le64 extended_src;
51 };
52};
53
54struct ieee802154_addr {
55 u8 mode;
56 __le16 pan_id;
57 union {
58 __le16 short_addr;
59 __le64 extended_addr;
60 };
61};
62
63struct ieee802154_hdr_fc {
64#if defined(__LITTLE_ENDIAN_BITFIELD)
65 u16 type:3,
66 security_enabled:1,
67 frame_pending:1,
68 ack_request:1,
69 intra_pan:1,
70 reserved:3,
71 dest_addr_mode:2,
72 version:2,
73 source_addr_mode:2;
74#elif defined(__BIG_ENDIAN_BITFIELD)
75 u16 reserved:1,
76 intra_pan:1,
77 ack_request:1,
78 frame_pending:1,
79 security_enabled:1,
80 type:3,
81 source_addr_mode:2,
82 version:2,
83 dest_addr_mode:2,
84 reserved2:2;
85#else
86#error "Please fix <asm/byteorder.h>"
87#endif
88};
89
90struct ieee802154_hdr {
91 struct ieee802154_hdr_fc fc;
92 u8 seq;
93 struct ieee802154_addr source;
94 struct ieee802154_addr dest;
95 struct ieee802154_sechdr sec;
96};
97
98/* pushes hdr onto the skb. fields of hdr->fc that can be calculated from
99 * the contents of hdr will be, and the actual value of those bits in
100 * hdr->fc will be ignored. this includes the INTRA_PAN bit and the frame
101 * version, if SECEN is set.
102 */
103int ieee802154_hdr_push(struct sk_buff *skb, const struct ieee802154_hdr *hdr);
104
105/* pulls the entire 802.15.4 header off of the skb, including the security
106 * header, and performs pan id decompression
107 */
108int ieee802154_hdr_pull(struct sk_buff *skb, struct ieee802154_hdr *hdr);
109
110/* parses the frame control, sequence number of address fields in a given skb
111 * and stores them into hdr, performing pan id decompression and length checks
112 * to be suitable for use in header_ops.parse
113 */
114int ieee802154_hdr_peek_addrs(const struct sk_buff *skb,
115 struct ieee802154_hdr *hdr);
116
117static inline int ieee802154_hdr_length(struct sk_buff *skb)
118{
119 struct ieee802154_hdr hdr;
120 int len = ieee802154_hdr_pull(skb, &hdr);
121
122 if (len > 0)
123 skb_push(skb, len);
124
125 return len;
126}
127
128static inline bool ieee802154_addr_equal(const struct ieee802154_addr *a1,
129 const struct ieee802154_addr *a2)
130{
131 if (a1->pan_id != a2->pan_id || a1->mode != a2->mode)
132 return false;
133
134 if ((a1->mode == IEEE802154_ADDR_LONG &&
135 a1->extended_addr != a2->extended_addr) ||
136 (a1->mode == IEEE802154_ADDR_SHORT &&
137 a1->short_addr != a2->short_addr))
138 return false;
139
140 return true;
141}
142
143static inline __le64 ieee802154_devaddr_from_raw(const void *raw)
144{
145 u64 temp;
146
147 memcpy(&temp, raw, IEEE802154_ADDR_LEN);
148 return (__force __le64)swab64(temp);
149}
150
151static inline void ieee802154_devaddr_to_raw(void *raw, __le64 addr)
152{
153 u64 temp = swab64((__force u64)addr);
154
155 memcpy(raw, &temp, IEEE802154_ADDR_LEN);
156}
157
158static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a,
159 const struct ieee802154_addr_sa *sa)
160{
161 a->mode = sa->addr_type;
162 a->pan_id = cpu_to_le16(sa->pan_id);
163
164 switch (a->mode) {
165 case IEEE802154_ADDR_SHORT:
166 a->short_addr = cpu_to_le16(sa->short_addr);
167 break;
168 case IEEE802154_ADDR_LONG:
169 a->extended_addr = ieee802154_devaddr_from_raw(sa->hwaddr);
170 break;
171 }
172}
173
174static inline void ieee802154_addr_to_sa(struct ieee802154_addr_sa *sa,
175 const struct ieee802154_addr *a)
176{
177 sa->addr_type = a->mode;
178 sa->pan_id = le16_to_cpu(a->pan_id);
179
180 switch (a->mode) {
181 case IEEE802154_ADDR_SHORT:
182 sa->short_addr = le16_to_cpu(a->short_addr);
183 break;
184 case IEEE802154_ADDR_LONG:
185 ieee802154_devaddr_to_raw(sa->hwaddr, a->extended_addr);
186 break;
187 }
188}
189
190/*
191 * A control block of skb passed between the ARPHRD_IEEE802154 device
192 * and other stack parts.
193 */
194struct ieee802154_mac_cb {
195 u8 lqi;
196 u8 flags;
197 u8 seq;
198 struct ieee802154_addr source;
199 struct ieee802154_addr dest;
200};
201
202static inline struct ieee802154_mac_cb *mac_cb(struct sk_buff *skb)
203{
204 return (struct ieee802154_mac_cb *)skb->cb;
205}
206
207#define MAC_CB_FLAG_TYPEMASK ((1 << 3) - 1)
208
209#define MAC_CB_FLAG_ACKREQ (1 << 3)
210#define MAC_CB_FLAG_SECEN (1 << 4)
211
212static inline bool mac_cb_is_ackreq(struct sk_buff *skb)
213{
214 return mac_cb(skb)->flags & MAC_CB_FLAG_ACKREQ;
215}
216
217static inline bool mac_cb_is_secen(struct sk_buff *skb)
218{
219 return mac_cb(skb)->flags & MAC_CB_FLAG_SECEN;
220}
221
222static inline int mac_cb_type(struct sk_buff *skb)
223{
224 return mac_cb(skb)->flags & MAC_CB_FLAG_TYPEMASK;
225}
226
227#define IEEE802154_MAC_SCAN_ED 0
228#define IEEE802154_MAC_SCAN_ACTIVE 1
229#define IEEE802154_MAC_SCAN_PASSIVE 2
230#define IEEE802154_MAC_SCAN_ORPHAN 3
231
232struct ieee802154_mac_params {
233 s8 transmit_power;
234 u8 min_be;
235 u8 max_be;
236 u8 csma_retries;
237 s8 frame_retries;
238
239 bool lbt;
240 u8 cca_mode;
241 s32 cca_ed_level;
242};
243
244struct wpan_phy;
245/*
246 * This should be located at net_device->ml_priv
247 *
248 * get_phy should increment the reference counting on returned phy.
249 * Use wpan_wpy_put to put that reference.
250 */
251struct ieee802154_mlme_ops {
252 /* The following fields are optional (can be NULL). */
253
254 int (*assoc_req)(struct net_device *dev,
255 struct ieee802154_addr *addr,
256 u8 channel, u8 page, u8 cap);
257 int (*assoc_resp)(struct net_device *dev,
258 struct ieee802154_addr *addr,
259 __le16 short_addr, u8 status);
260 int (*disassoc_req)(struct net_device *dev,
261 struct ieee802154_addr *addr,
262 u8 reason);
263 int (*start_req)(struct net_device *dev,
264 struct ieee802154_addr *addr,
265 u8 channel, u8 page, u8 bcn_ord, u8 sf_ord,
266 u8 pan_coord, u8 blx, u8 coord_realign);
267 int (*scan_req)(struct net_device *dev,
268 u8 type, u32 channels, u8 page, u8 duration);
269
270 int (*set_mac_params)(struct net_device *dev,
271 const struct ieee802154_mac_params *params);
272 void (*get_mac_params)(struct net_device *dev,
273 struct ieee802154_mac_params *params);
274
275 /* The fields below are required. */
276
277 struct wpan_phy *(*get_phy)(const struct net_device *dev);
278
279 /*
280 * FIXME: these should become the part of PIB/MIB interface.
281 * However we still don't have IB interface of any kind
282 */
283 __le16 (*get_pan_id)(const struct net_device *dev);
284 __le16 (*get_short_addr)(const struct net_device *dev);
285 u8 (*get_dsn)(const struct net_device *dev);
286};
287
288/* The IEEE 802.15.4 standard defines 2 type of the devices:
289 * - FFD - full functionality device
290 * - RFD - reduce functionality device
291 *
292 * So 2 sets of mlme operations are needed
293 */
294struct ieee802154_reduced_mlme_ops {
295 struct wpan_phy *(*get_phy)(const struct net_device *dev);
296};
297
298static inline struct ieee802154_mlme_ops *
299ieee802154_mlme_ops(const struct net_device *dev)
300{
301 return dev->ml_priv;
302}
303
304static inline struct ieee802154_reduced_mlme_ops *
305ieee802154_reduced_mlme_ops(const struct net_device *dev)
306{
307 return dev->ml_priv;
308}
309
310#endif