1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22#ifndef _LINUX_ETHERDEVICE_H
23#define _LINUX_ETHERDEVICE_H
24
25#include <linux/if_ether.h>
26#include <linux/netdevice.h>
27#include <linux/random.h>
28#include <asm/unaligned.h>
29#include <asm/bitsperlong.h>
30
31#ifdef __KERNEL__
32struct device;
33int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr);
34unsigned char *arch_get_platform_get_mac_address(void);
35u32 eth_get_headlen(void *data, unsigned int max_len);
36__be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev);
37extern const struct header_ops eth_header_ops;
38
39int eth_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
40 const void *daddr, const void *saddr, unsigned len);
41int eth_header_parse(const struct sk_buff *skb, unsigned char *haddr);
42int eth_header_cache(const struct neighbour *neigh, struct hh_cache *hh,
43 __be16 type);
44void eth_header_cache_update(struct hh_cache *hh, const struct net_device *dev,
45 const unsigned char *haddr);
46int eth_prepare_mac_addr_change(struct net_device *dev, void *p);
47void eth_commit_mac_addr_change(struct net_device *dev, void *p);
48int eth_mac_addr(struct net_device *dev, void *p);
49int eth_change_mtu(struct net_device *dev, int new_mtu);
50int eth_validate_addr(struct net_device *dev);
51
52struct net_device *alloc_etherdev_mqs(int sizeof_priv, unsigned int txqs,
53 unsigned int rxqs);
54#define alloc_etherdev(sizeof_priv) alloc_etherdev_mq(sizeof_priv, 1)
55#define alloc_etherdev_mq(sizeof_priv, count) alloc_etherdev_mqs(sizeof_priv, count, count)
56
57struct net_device *devm_alloc_etherdev_mqs(struct device *dev, int sizeof_priv,
58 unsigned int txqs,
59 unsigned int rxqs);
60#define devm_alloc_etherdev(dev, sizeof_priv) devm_alloc_etherdev_mqs(dev, sizeof_priv, 1, 1)
61
62struct sk_buff **eth_gro_receive(struct sk_buff **head,
63 struct sk_buff *skb);
64int eth_gro_complete(struct sk_buff *skb, int nhoff);
65
66
67static const u8 eth_reserved_addr_base[ETH_ALEN] __aligned(2) =
68{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
69
70
71
72
73
74
75
76
77
78
79static inline bool is_link_local_ether_addr(const u8 *addr)
80{
81 __be16 *a = (__be16 *)addr;
82 static const __be16 *b = (const __be16 *)eth_reserved_addr_base;
83 static const __be16 m = cpu_to_be16(0xfff0);
84
85#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
86 return (((*(const u32 *)addr) ^ (*(const u32 *)b)) |
87 (__force int)((a[2] ^ b[2]) & m)) == 0;
88#else
89 return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | ((a[2] ^ b[2]) & m)) == 0;
90#endif
91}
92
93
94
95
96
97
98
99
100
101static inline bool is_zero_ether_addr(const u8 *addr)
102{
103#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
104 return ((*(const u32 *)addr) | (*(const u16 *)(addr + 4))) == 0;
105#else
106 return (*(const u16 *)(addr + 0) |
107 *(const u16 *)(addr + 2) |
108 *(const u16 *)(addr + 4)) == 0;
109#endif
110}
111
112
113
114
115
116
117
118
119static inline bool is_multicast_ether_addr(const u8 *addr)
120{
121#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
122 u32 a = *(const u32 *)addr;
123#else
124 u16 a = *(const u16 *)addr;
125#endif
126#ifdef __BIG_ENDIAN
127 return 0x01 & (a >> ((sizeof(a) * 8) - 8));
128#else
129 return 0x01 & a;
130#endif
131}
132
133static inline bool is_multicast_ether_addr_64bits(const u8 addr[6+2])
134{
135#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
136#ifdef __BIG_ENDIAN
137 return 0x01 & ((*(const u64 *)addr) >> 56);
138#else
139 return 0x01 & (*(const u64 *)addr);
140#endif
141#else
142 return is_multicast_ether_addr(addr);
143#endif
144}
145
146
147
148
149
150
151
152static inline bool is_local_ether_addr(const u8 *addr)
153{
154 return 0x02 & addr[0];
155}
156
157
158
159
160
161
162
163
164
165static inline bool is_broadcast_ether_addr(const u8 *addr)
166{
167 return (*(const u16 *)(addr + 0) &
168 *(const u16 *)(addr + 2) &
169 *(const u16 *)(addr + 4)) == 0xffff;
170}
171
172
173
174
175
176
177
178static inline bool is_unicast_ether_addr(const u8 *addr)
179{
180 return !is_multicast_ether_addr(addr);
181}
182
183
184
185
186
187
188
189
190
191
192
193
194static inline bool is_valid_ether_addr(const u8 *addr)
195{
196
197
198 return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
199}
200
201
202
203
204
205
206
207
208
209static inline bool eth_proto_is_802_3(__be16 proto)
210{
211#ifndef __BIG_ENDIAN
212
213 proto &= htons(0xFF00);
214#endif
215
216 return (__force u16)proto >= (__force u16)htons(ETH_P_802_3_MIN);
217}
218
219
220
221
222
223
224
225
226static inline void eth_random_addr(u8 *addr)
227{
228 get_random_bytes(addr, ETH_ALEN);
229 addr[0] &= 0xfe;
230 addr[0] |= 0x02;
231}
232
233#define random_ether_addr(addr) eth_random_addr(addr)
234
235
236
237
238
239
240
241static inline void eth_broadcast_addr(u8 *addr)
242{
243 memset(addr, 0xff, ETH_ALEN);
244}
245
246
247
248
249
250
251
252static inline void eth_zero_addr(u8 *addr)
253{
254 memset(addr, 0x00, ETH_ALEN);
255}
256
257
258
259
260
261
262
263
264
265
266static inline void eth_hw_addr_random(struct net_device *dev)
267{
268 dev->addr_assign_type = NET_ADDR_RANDOM;
269 eth_random_addr(dev->dev_addr);
270}
271
272
273
274
275
276
277
278
279static inline void ether_addr_copy(u8 *dst, const u8 *src)
280{
281#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
282 *(u32 *)dst = *(const u32 *)src;
283 *(u16 *)(dst + 4) = *(const u16 *)(src + 4);
284#else
285 u16 *a = (u16 *)dst;
286 const u16 *b = (const u16 *)src;
287
288 a[0] = b[0];
289 a[1] = b[1];
290 a[2] = b[2];
291#endif
292}
293
294
295
296
297
298
299
300
301
302static inline void eth_hw_addr_inherit(struct net_device *dst,
303 struct net_device *src)
304{
305 dst->addr_assign_type = src->addr_assign_type;
306 ether_addr_copy(dst->dev_addr, src->dev_addr);
307}
308
309
310
311
312
313
314
315
316
317
318static inline bool ether_addr_equal(const u8 *addr1, const u8 *addr2)
319{
320#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
321 u32 fold = ((*(const u32 *)addr1) ^ (*(const u32 *)addr2)) |
322 ((*(const u16 *)(addr1 + 4)) ^ (*(const u16 *)(addr2 + 4)));
323
324 return fold == 0;
325#else
326 const u16 *a = (const u16 *)addr1;
327 const u16 *b = (const u16 *)addr2;
328
329 return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) == 0;
330#endif
331}
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347static inline bool ether_addr_equal_64bits(const u8 addr1[6+2],
348 const u8 addr2[6+2])
349{
350#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
351 u64 fold = (*(const u64 *)addr1) ^ (*(const u64 *)addr2);
352
353#ifdef __BIG_ENDIAN
354 return (fold >> 16) == 0;
355#else
356 return (fold << 16) == 0;
357#endif
358#else
359 return ether_addr_equal(addr1, addr2);
360#endif
361}
362
363
364
365
366
367
368
369
370
371
372static inline bool ether_addr_equal_unaligned(const u8 *addr1, const u8 *addr2)
373{
374#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
375 return ether_addr_equal(addr1, addr2);
376#else
377 return memcmp(addr1, addr2, ETH_ALEN) == 0;
378#endif
379}
380
381
382
383
384
385
386
387
388
389
390
391static inline bool ether_addr_equal_masked(const u8 *addr1, const u8 *addr2,
392 const u8 *mask)
393{
394 int i;
395
396 for (i = 0; i < ETH_ALEN; i++) {
397 if ((addr1[i] ^ addr2[i]) & mask[i])
398 return false;
399 }
400
401 return true;
402}
403
404
405
406
407
408
409
410static inline u64 ether_addr_to_u64(const u8 *addr)
411{
412 u64 u = 0;
413 int i;
414
415 for (i = 0; i < ETH_ALEN; i++)
416 u = u << 8 | addr[i];
417
418 return u;
419}
420
421
422
423
424
425
426static inline void u64_to_ether_addr(u64 u, u8 *addr)
427{
428 int i;
429
430 for (i = ETH_ALEN - 1; i >= 0; i--) {
431 addr[i] = u & 0xff;
432 u = u >> 8;
433 }
434}
435
436
437
438
439
440
441static inline void eth_addr_dec(u8 *addr)
442{
443 u64 u = ether_addr_to_u64(addr);
444
445 u--;
446 u64_to_ether_addr(u, addr);
447}
448
449
450
451
452
453
454
455
456
457
458
459
460static inline bool is_etherdev_addr(const struct net_device *dev,
461 const u8 addr[6 + 2])
462{
463 struct netdev_hw_addr *ha;
464 bool res = false;
465
466 rcu_read_lock();
467 for_each_dev_addr(dev, ha) {
468 res = ether_addr_equal_64bits(addr, ha->addr);
469 if (res)
470 break;
471 }
472 rcu_read_unlock();
473 return res;
474}
475#endif
476
477
478
479
480
481
482
483
484
485
486
487
488
489static inline unsigned long compare_ether_header(const void *a, const void *b)
490{
491#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
492 unsigned long fold;
493
494
495
496
497
498
499
500
501
502 fold = *(unsigned long *)a ^ *(unsigned long *)b;
503 fold |= *(unsigned long *)(a + 6) ^ *(unsigned long *)(b + 6);
504 return fold;
505#else
506 u32 *a32 = (u32 *)((u8 *)a + 2);
507 u32 *b32 = (u32 *)((u8 *)b + 2);
508
509 return (*(u16 *)a ^ *(u16 *)b) | (a32[0] ^ b32[0]) |
510 (a32[1] ^ b32[1]) | (a32[2] ^ b32[2]);
511#endif
512}
513
514
515
516
517
518
519
520
521static inline int eth_skb_pad(struct sk_buff *skb)
522{
523 return skb_put_padto(skb, ETH_ZLEN);
524}
525
526#endif
527