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24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/kernel.h>
27#include <linux/errno.h>
28#include <linux/idr.h>
29#include <linux/list.h>
30#include <linux/proc_fs.h>
31#include <linux/slab.h>
32#include <linux/seq_file.h>
33#include <linux/netdevice.h>
34
35#include <asm/io.h>
36#include <asm/byteorder.h>
37#include <asm/unaligned.h>
38
39#include "u_rndis.h"
40
41#undef VERBOSE_DEBUG
42
43#include "rndis.h"
44
45
46
47
48
49
50
51
52
53#if 0
54static int rndis_debug = 0;
55module_param (rndis_debug, int, 0);
56MODULE_PARM_DESC (rndis_debug, "enable debugging");
57#else
58#define rndis_debug 0
59#endif
60
61#ifdef CONFIG_USB_GADGET_DEBUG_FILES
62
63#define NAME_TEMPLATE "driver/rndis-%03d"
64
65#endif
66
67static DEFINE_IDA(rndis_ida);
68
69
70static const __le32 rndis_driver_version = cpu_to_le32(1);
71
72
73static rndis_resp_t *rndis_add_response(struct rndis_params *params,
74 u32 length);
75
76#ifdef CONFIG_USB_GADGET_DEBUG_FILES
77
78static const struct file_operations rndis_proc_fops;
79
80#endif
81
82
83static const u32 oid_supported_list[] = {
84
85 RNDIS_OID_GEN_SUPPORTED_LIST,
86 RNDIS_OID_GEN_HARDWARE_STATUS,
87 RNDIS_OID_GEN_MEDIA_SUPPORTED,
88 RNDIS_OID_GEN_MEDIA_IN_USE,
89 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
90 RNDIS_OID_GEN_LINK_SPEED,
91 RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE,
92 RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE,
93 RNDIS_OID_GEN_VENDOR_ID,
94 RNDIS_OID_GEN_VENDOR_DESCRIPTION,
95 RNDIS_OID_GEN_VENDOR_DRIVER_VERSION,
96 RNDIS_OID_GEN_CURRENT_PACKET_FILTER,
97 RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE,
98 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
99 RNDIS_OID_GEN_PHYSICAL_MEDIUM,
100
101
102 RNDIS_OID_GEN_XMIT_OK,
103 RNDIS_OID_GEN_RCV_OK,
104 RNDIS_OID_GEN_XMIT_ERROR,
105 RNDIS_OID_GEN_RCV_ERROR,
106 RNDIS_OID_GEN_RCV_NO_BUFFER,
107#ifdef RNDIS_OPTIONAL_STATS
108 RNDIS_OID_GEN_DIRECTED_BYTES_XMIT,
109 RNDIS_OID_GEN_DIRECTED_FRAMES_XMIT,
110 RNDIS_OID_GEN_MULTICAST_BYTES_XMIT,
111 RNDIS_OID_GEN_MULTICAST_FRAMES_XMIT,
112 RNDIS_OID_GEN_BROADCAST_BYTES_XMIT,
113 RNDIS_OID_GEN_BROADCAST_FRAMES_XMIT,
114 RNDIS_OID_GEN_DIRECTED_BYTES_RCV,
115 RNDIS_OID_GEN_DIRECTED_FRAMES_RCV,
116 RNDIS_OID_GEN_MULTICAST_BYTES_RCV,
117 RNDIS_OID_GEN_MULTICAST_FRAMES_RCV,
118 RNDIS_OID_GEN_BROADCAST_BYTES_RCV,
119 RNDIS_OID_GEN_BROADCAST_FRAMES_RCV,
120 RNDIS_OID_GEN_RCV_CRC_ERROR,
121 RNDIS_OID_GEN_TRANSMIT_QUEUE_LENGTH,
122#endif
123
124
125
126 RNDIS_OID_802_3_PERMANENT_ADDRESS,
127 RNDIS_OID_802_3_CURRENT_ADDRESS,
128 RNDIS_OID_802_3_MULTICAST_LIST,
129 RNDIS_OID_802_3_MAC_OPTIONS,
130 RNDIS_OID_802_3_MAXIMUM_LIST_SIZE,
131
132
133 RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT,
134 RNDIS_OID_802_3_XMIT_ONE_COLLISION,
135 RNDIS_OID_802_3_XMIT_MORE_COLLISIONS,
136#ifdef RNDIS_OPTIONAL_STATS
137 RNDIS_OID_802_3_XMIT_DEFERRED,
138 RNDIS_OID_802_3_XMIT_MAX_COLLISIONS,
139 RNDIS_OID_802_3_RCV_OVERRUN,
140 RNDIS_OID_802_3_XMIT_UNDERRUN,
141 RNDIS_OID_802_3_XMIT_HEARTBEAT_FAILURE,
142 RNDIS_OID_802_3_XMIT_TIMES_CRS_LOST,
143 RNDIS_OID_802_3_XMIT_LATE_COLLISIONS,
144#endif
145
146#ifdef RNDIS_PM
147
148
149
150
151
152
153
154
155
156
157 OID_PNP_CAPABILITIES,
158 OID_PNP_QUERY_POWER,
159 OID_PNP_SET_POWER,
160
161#ifdef RNDIS_WAKEUP
162
163 OID_PNP_ENABLE_WAKE_UP,
164 OID_PNP_ADD_WAKE_UP_PATTERN,
165 OID_PNP_REMOVE_WAKE_UP_PATTERN,
166#endif
167#endif
168};
169
170
171
172static int gen_ndis_query_resp(struct rndis_params *params, u32 OID, u8 *buf,
173 unsigned buf_len, rndis_resp_t *r)
174{
175 int retval = -ENOTSUPP;
176 u32 length = 4;
177 __le32 *outbuf;
178 int i, count;
179 rndis_query_cmplt_type *resp;
180 struct net_device *net;
181 struct rtnl_link_stats64 temp;
182 const struct rtnl_link_stats64 *stats;
183
184 if (!r) return -ENOMEM;
185 resp = (rndis_query_cmplt_type *)r->buf;
186
187 if (!resp) return -ENOMEM;
188
189 if (buf_len && rndis_debug > 1) {
190 pr_debug("query OID %08x value, len %d:\n", OID, buf_len);
191 for (i = 0; i < buf_len; i += 16) {
192 pr_debug("%03d: %08x %08x %08x %08x\n", i,
193 get_unaligned_le32(&buf[i]),
194 get_unaligned_le32(&buf[i + 4]),
195 get_unaligned_le32(&buf[i + 8]),
196 get_unaligned_le32(&buf[i + 12]));
197 }
198 }
199
200
201 outbuf = (__le32 *)&resp[1];
202 resp->InformationBufferOffset = cpu_to_le32(16);
203
204 net = params->dev;
205 stats = dev_get_stats(net, &temp);
206
207 switch (OID) {
208
209
210
211
212 case RNDIS_OID_GEN_SUPPORTED_LIST:
213 pr_debug("%s: RNDIS_OID_GEN_SUPPORTED_LIST\n", __func__);
214 length = sizeof(oid_supported_list);
215 count = length / sizeof(u32);
216 for (i = 0; i < count; i++)
217 outbuf[i] = cpu_to_le32(oid_supported_list[i]);
218 retval = 0;
219 break;
220
221
222 case RNDIS_OID_GEN_HARDWARE_STATUS:
223 pr_debug("%s: RNDIS_OID_GEN_HARDWARE_STATUS\n", __func__);
224
225
226
227
228
229
230 *outbuf = cpu_to_le32(0);
231 retval = 0;
232 break;
233
234
235 case RNDIS_OID_GEN_MEDIA_SUPPORTED:
236 pr_debug("%s: RNDIS_OID_GEN_MEDIA_SUPPORTED\n", __func__);
237 *outbuf = cpu_to_le32(params->medium);
238 retval = 0;
239 break;
240
241
242 case RNDIS_OID_GEN_MEDIA_IN_USE:
243 pr_debug("%s: RNDIS_OID_GEN_MEDIA_IN_USE\n", __func__);
244
245 *outbuf = cpu_to_le32(params->medium);
246 retval = 0;
247 break;
248
249
250 case RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE:
251 pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
252 if (params->dev) {
253 *outbuf = cpu_to_le32(params->dev->mtu);
254 retval = 0;
255 }
256 break;
257
258
259 case RNDIS_OID_GEN_LINK_SPEED:
260 if (rndis_debug > 1)
261 pr_debug("%s: RNDIS_OID_GEN_LINK_SPEED\n", __func__);
262 if (params->media_state == RNDIS_MEDIA_STATE_DISCONNECTED)
263 *outbuf = cpu_to_le32(0);
264 else
265 *outbuf = cpu_to_le32(params->speed);
266 retval = 0;
267 break;
268
269
270 case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE:
271 pr_debug("%s: RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
272 if (params->dev) {
273 *outbuf = cpu_to_le32(params->dev->mtu);
274 retval = 0;
275 }
276 break;
277
278
279 case RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE:
280 pr_debug("%s: RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
281 if (params->dev) {
282 *outbuf = cpu_to_le32(params->dev->mtu);
283 retval = 0;
284 }
285 break;
286
287
288 case RNDIS_OID_GEN_VENDOR_ID:
289 pr_debug("%s: RNDIS_OID_GEN_VENDOR_ID\n", __func__);
290 *outbuf = cpu_to_le32(params->vendorID);
291 retval = 0;
292 break;
293
294
295 case RNDIS_OID_GEN_VENDOR_DESCRIPTION:
296 pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__);
297 if (params->vendorDescr) {
298 length = strlen(params->vendorDescr);
299 memcpy(outbuf, params->vendorDescr, length);
300 } else {
301 outbuf[0] = 0;
302 }
303 retval = 0;
304 break;
305
306 case RNDIS_OID_GEN_VENDOR_DRIVER_VERSION:
307 pr_debug("%s: RNDIS_OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
308
309 *outbuf = rndis_driver_version;
310 retval = 0;
311 break;
312
313
314 case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
315 pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
316 *outbuf = cpu_to_le32(*params->filter);
317 retval = 0;
318 break;
319
320
321 case RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE:
322 pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
323 *outbuf = cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
324 retval = 0;
325 break;
326
327
328 case RNDIS_OID_GEN_MEDIA_CONNECT_STATUS:
329 if (rndis_debug > 1)
330 pr_debug("%s: RNDIS_OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
331 *outbuf = cpu_to_le32(params->media_state);
332 retval = 0;
333 break;
334
335 case RNDIS_OID_GEN_PHYSICAL_MEDIUM:
336 pr_debug("%s: RNDIS_OID_GEN_PHYSICAL_MEDIUM\n", __func__);
337 *outbuf = cpu_to_le32(0);
338 retval = 0;
339 break;
340
341
342
343
344
345 case RNDIS_OID_GEN_MAC_OPTIONS:
346 pr_debug("%s: RNDIS_OID_GEN_MAC_OPTIONS\n", __func__);
347 *outbuf = cpu_to_le32(
348 RNDIS_MAC_OPTION_RECEIVE_SERIALIZED
349 | RNDIS_MAC_OPTION_FULL_DUPLEX);
350 retval = 0;
351 break;
352
353
354
355
356 case RNDIS_OID_GEN_XMIT_OK:
357 if (rndis_debug > 1)
358 pr_debug("%s: RNDIS_OID_GEN_XMIT_OK\n", __func__);
359 if (stats) {
360 *outbuf = cpu_to_le32(stats->tx_packets
361 - stats->tx_errors - stats->tx_dropped);
362 retval = 0;
363 }
364 break;
365
366
367 case RNDIS_OID_GEN_RCV_OK:
368 if (rndis_debug > 1)
369 pr_debug("%s: RNDIS_OID_GEN_RCV_OK\n", __func__);
370 if (stats) {
371 *outbuf = cpu_to_le32(stats->rx_packets
372 - stats->rx_errors - stats->rx_dropped);
373 retval = 0;
374 }
375 break;
376
377
378 case RNDIS_OID_GEN_XMIT_ERROR:
379 if (rndis_debug > 1)
380 pr_debug("%s: RNDIS_OID_GEN_XMIT_ERROR\n", __func__);
381 if (stats) {
382 *outbuf = cpu_to_le32(stats->tx_errors);
383 retval = 0;
384 }
385 break;
386
387
388 case RNDIS_OID_GEN_RCV_ERROR:
389 if (rndis_debug > 1)
390 pr_debug("%s: RNDIS_OID_GEN_RCV_ERROR\n", __func__);
391 if (stats) {
392 *outbuf = cpu_to_le32(stats->rx_errors);
393 retval = 0;
394 }
395 break;
396
397
398 case RNDIS_OID_GEN_RCV_NO_BUFFER:
399 pr_debug("%s: RNDIS_OID_GEN_RCV_NO_BUFFER\n", __func__);
400 if (stats) {
401 *outbuf = cpu_to_le32(stats->rx_dropped);
402 retval = 0;
403 }
404 break;
405
406
407
408
409 case RNDIS_OID_802_3_PERMANENT_ADDRESS:
410 pr_debug("%s: RNDIS_OID_802_3_PERMANENT_ADDRESS\n", __func__);
411 if (params->dev) {
412 length = ETH_ALEN;
413 memcpy(outbuf, params->host_mac, length);
414 retval = 0;
415 }
416 break;
417
418
419 case RNDIS_OID_802_3_CURRENT_ADDRESS:
420 pr_debug("%s: RNDIS_OID_802_3_CURRENT_ADDRESS\n", __func__);
421 if (params->dev) {
422 length = ETH_ALEN;
423 memcpy(outbuf, params->host_mac, length);
424 retval = 0;
425 }
426 break;
427
428
429 case RNDIS_OID_802_3_MULTICAST_LIST:
430 pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
431
432 *outbuf = cpu_to_le32(0xE0000000);
433 retval = 0;
434 break;
435
436
437 case RNDIS_OID_802_3_MAXIMUM_LIST_SIZE:
438 pr_debug("%s: RNDIS_OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
439
440 *outbuf = cpu_to_le32(1);
441 retval = 0;
442 break;
443
444 case RNDIS_OID_802_3_MAC_OPTIONS:
445 pr_debug("%s: RNDIS_OID_802_3_MAC_OPTIONS\n", __func__);
446 *outbuf = cpu_to_le32(0);
447 retval = 0;
448 break;
449
450
451
452
453 case RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT:
454 pr_debug("%s: RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
455 if (stats) {
456 *outbuf = cpu_to_le32(stats->rx_frame_errors);
457 retval = 0;
458 }
459 break;
460
461
462 case RNDIS_OID_802_3_XMIT_ONE_COLLISION:
463 pr_debug("%s: RNDIS_OID_802_3_XMIT_ONE_COLLISION\n", __func__);
464 *outbuf = cpu_to_le32(0);
465 retval = 0;
466 break;
467
468
469 case RNDIS_OID_802_3_XMIT_MORE_COLLISIONS:
470 pr_debug("%s: RNDIS_OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
471 *outbuf = cpu_to_le32(0);
472 retval = 0;
473 break;
474
475 default:
476 pr_warn("%s: query unknown OID 0x%08X\n", __func__, OID);
477 }
478 if (retval < 0)
479 length = 0;
480
481 resp->InformationBufferLength = cpu_to_le32(length);
482 r->length = length + sizeof(*resp);
483 resp->MessageLength = cpu_to_le32(r->length);
484 return retval;
485}
486
487static int gen_ndis_set_resp(struct rndis_params *params, u32 OID,
488 u8 *buf, u32 buf_len, rndis_resp_t *r)
489{
490 rndis_set_cmplt_type *resp;
491 int i, retval = -ENOTSUPP;
492
493 if (!r)
494 return -ENOMEM;
495 resp = (rndis_set_cmplt_type *)r->buf;
496 if (!resp)
497 return -ENOMEM;
498
499 if (buf_len && rndis_debug > 1) {
500 pr_debug("set OID %08x value, len %d:\n", OID, buf_len);
501 for (i = 0; i < buf_len; i += 16) {
502 pr_debug("%03d: %08x %08x %08x %08x\n", i,
503 get_unaligned_le32(&buf[i]),
504 get_unaligned_le32(&buf[i + 4]),
505 get_unaligned_le32(&buf[i + 8]),
506 get_unaligned_le32(&buf[i + 12]));
507 }
508 }
509
510 switch (OID) {
511 case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
512
513
514
515
516
517
518
519 *params->filter = (u16)get_unaligned_le32(buf);
520 pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER %08x\n",
521 __func__, *params->filter);
522
523
524
525
526
527 retval = 0;
528 if (*params->filter) {
529 params->state = RNDIS_DATA_INITIALIZED;
530 netif_carrier_on(params->dev);
531 if (netif_running(params->dev))
532 netif_wake_queue(params->dev);
533 } else {
534 params->state = RNDIS_INITIALIZED;
535 netif_carrier_off(params->dev);
536 netif_stop_queue(params->dev);
537 }
538 break;
539
540 case RNDIS_OID_802_3_MULTICAST_LIST:
541
542 pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
543 retval = 0;
544 break;
545
546 default:
547 pr_warn("%s: set unknown OID 0x%08X, size %d\n",
548 __func__, OID, buf_len);
549 }
550
551 return retval;
552}
553
554
555
556
557
558static int rndis_init_response(struct rndis_params *params,
559 rndis_init_msg_type *buf)
560{
561 rndis_init_cmplt_type *resp;
562 rndis_resp_t *r;
563
564 if (!params->dev)
565 return -ENOTSUPP;
566
567 r = rndis_add_response(params, sizeof(rndis_init_cmplt_type));
568 if (!r)
569 return -ENOMEM;
570 resp = (rndis_init_cmplt_type *)r->buf;
571
572 resp->MessageType = cpu_to_le32(RNDIS_MSG_INIT_C);
573 resp->MessageLength = cpu_to_le32(52);
574 resp->RequestID = buf->RequestID;
575 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
576 resp->MajorVersion = cpu_to_le32(RNDIS_MAJOR_VERSION);
577 resp->MinorVersion = cpu_to_le32(RNDIS_MINOR_VERSION);
578 resp->DeviceFlags = cpu_to_le32(RNDIS_DF_CONNECTIONLESS);
579 resp->Medium = cpu_to_le32(RNDIS_MEDIUM_802_3);
580 resp->MaxPacketsPerTransfer = cpu_to_le32(1);
581 resp->MaxTransferSize = cpu_to_le32(
582 params->dev->mtu
583 + sizeof(struct ethhdr)
584 + sizeof(struct rndis_packet_msg_type)
585 + 22);
586 resp->PacketAlignmentFactor = cpu_to_le32(0);
587 resp->AFListOffset = cpu_to_le32(0);
588 resp->AFListSize = cpu_to_le32(0);
589
590 params->resp_avail(params->v);
591 return 0;
592}
593
594static int rndis_query_response(struct rndis_params *params,
595 rndis_query_msg_type *buf)
596{
597 rndis_query_cmplt_type *resp;
598 rndis_resp_t *r;
599
600
601 if (!params->dev)
602 return -ENOTSUPP;
603
604
605
606
607
608
609
610 r = rndis_add_response(params,
611 sizeof(oid_supported_list) + sizeof(rndis_query_cmplt_type));
612 if (!r)
613 return -ENOMEM;
614 resp = (rndis_query_cmplt_type *)r->buf;
615
616 resp->MessageType = cpu_to_le32(RNDIS_MSG_QUERY_C);
617 resp->RequestID = buf->RequestID;
618
619 if (gen_ndis_query_resp(params, le32_to_cpu(buf->OID),
620 le32_to_cpu(buf->InformationBufferOffset)
621 + 8 + (u8 *)buf,
622 le32_to_cpu(buf->InformationBufferLength),
623 r)) {
624
625 resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
626 resp->MessageLength = cpu_to_le32(sizeof *resp);
627 resp->InformationBufferLength = cpu_to_le32(0);
628 resp->InformationBufferOffset = cpu_to_le32(0);
629 } else
630 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
631
632 params->resp_avail(params->v);
633 return 0;
634}
635
636static int rndis_set_response(struct rndis_params *params,
637 rndis_set_msg_type *buf)
638{
639 u32 BufLength, BufOffset;
640 rndis_set_cmplt_type *resp;
641 rndis_resp_t *r;
642
643 r = rndis_add_response(params, sizeof(rndis_set_cmplt_type));
644 if (!r)
645 return -ENOMEM;
646 resp = (rndis_set_cmplt_type *)r->buf;
647
648 BufLength = le32_to_cpu(buf->InformationBufferLength);
649 BufOffset = le32_to_cpu(buf->InformationBufferOffset);
650
651#ifdef VERBOSE_DEBUG
652 pr_debug("%s: Length: %d\n", __func__, BufLength);
653 pr_debug("%s: Offset: %d\n", __func__, BufOffset);
654 pr_debug("%s: InfoBuffer: ", __func__);
655
656 for (i = 0; i < BufLength; i++) {
657 pr_debug("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
658 }
659
660 pr_debug("\n");
661#endif
662
663 resp->MessageType = cpu_to_le32(RNDIS_MSG_SET_C);
664 resp->MessageLength = cpu_to_le32(16);
665 resp->RequestID = buf->RequestID;
666 if (gen_ndis_set_resp(params, le32_to_cpu(buf->OID),
667 ((u8 *)buf) + 8 + BufOffset, BufLength, r))
668 resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
669 else
670 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
671
672 params->resp_avail(params->v);
673 return 0;
674}
675
676static int rndis_reset_response(struct rndis_params *params,
677 rndis_reset_msg_type *buf)
678{
679 rndis_reset_cmplt_type *resp;
680 rndis_resp_t *r;
681 u8 *xbuf;
682 u32 length;
683
684
685 while ((xbuf = rndis_get_next_response(params, &length)))
686 rndis_free_response(params, xbuf);
687
688 r = rndis_add_response(params, sizeof(rndis_reset_cmplt_type));
689 if (!r)
690 return -ENOMEM;
691 resp = (rndis_reset_cmplt_type *)r->buf;
692
693 resp->MessageType = cpu_to_le32(RNDIS_MSG_RESET_C);
694 resp->MessageLength = cpu_to_le32(16);
695 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
696
697 resp->AddressingReset = cpu_to_le32(1);
698
699 params->resp_avail(params->v);
700 return 0;
701}
702
703static int rndis_keepalive_response(struct rndis_params *params,
704 rndis_keepalive_msg_type *buf)
705{
706 rndis_keepalive_cmplt_type *resp;
707 rndis_resp_t *r;
708
709
710
711 r = rndis_add_response(params, sizeof(rndis_keepalive_cmplt_type));
712 if (!r)
713 return -ENOMEM;
714 resp = (rndis_keepalive_cmplt_type *)r->buf;
715
716 resp->MessageType = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
717 resp->MessageLength = cpu_to_le32(16);
718 resp->RequestID = buf->RequestID;
719 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
720
721 params->resp_avail(params->v);
722 return 0;
723}
724
725
726
727
728
729static int rndis_indicate_status_msg(struct rndis_params *params, u32 status)
730{
731 rndis_indicate_status_msg_type *resp;
732 rndis_resp_t *r;
733
734 if (params->state == RNDIS_UNINITIALIZED)
735 return -ENOTSUPP;
736
737 r = rndis_add_response(params, sizeof(rndis_indicate_status_msg_type));
738 if (!r)
739 return -ENOMEM;
740 resp = (rndis_indicate_status_msg_type *)r->buf;
741
742 resp->MessageType = cpu_to_le32(RNDIS_MSG_INDICATE);
743 resp->MessageLength = cpu_to_le32(20);
744 resp->Status = cpu_to_le32(status);
745 resp->StatusBufferLength = cpu_to_le32(0);
746 resp->StatusBufferOffset = cpu_to_le32(0);
747
748 params->resp_avail(params->v);
749 return 0;
750}
751
752int rndis_signal_connect(struct rndis_params *params)
753{
754 params->media_state = RNDIS_MEDIA_STATE_CONNECTED;
755 return rndis_indicate_status_msg(params, RNDIS_STATUS_MEDIA_CONNECT);
756}
757EXPORT_SYMBOL_GPL(rndis_signal_connect);
758
759int rndis_signal_disconnect(struct rndis_params *params)
760{
761 params->media_state = RNDIS_MEDIA_STATE_DISCONNECTED;
762 return rndis_indicate_status_msg(params, RNDIS_STATUS_MEDIA_DISCONNECT);
763}
764EXPORT_SYMBOL_GPL(rndis_signal_disconnect);
765
766void rndis_uninit(struct rndis_params *params)
767{
768 u8 *buf;
769 u32 length;
770
771 if (!params)
772 return;
773 params->state = RNDIS_UNINITIALIZED;
774
775
776 while ((buf = rndis_get_next_response(params, &length)))
777 rndis_free_response(params, buf);
778}
779EXPORT_SYMBOL_GPL(rndis_uninit);
780
781void rndis_set_host_mac(struct rndis_params *params, const u8 *addr)
782{
783 params->host_mac = addr;
784}
785EXPORT_SYMBOL_GPL(rndis_set_host_mac);
786
787
788
789
790int rndis_msg_parser(struct rndis_params *params, u8 *buf)
791{
792 u32 MsgType, MsgLength;
793 __le32 *tmp;
794
795 if (!buf)
796 return -ENOMEM;
797
798 tmp = (__le32 *)buf;
799 MsgType = get_unaligned_le32(tmp++);
800 MsgLength = get_unaligned_le32(tmp++);
801
802 if (!params)
803 return -ENOTSUPP;
804
805
806
807
808
809
810
811 switch (MsgType) {
812 case RNDIS_MSG_INIT:
813 pr_debug("%s: RNDIS_MSG_INIT\n",
814 __func__);
815 params->state = RNDIS_INITIALIZED;
816 return rndis_init_response(params, (rndis_init_msg_type *)buf);
817
818 case RNDIS_MSG_HALT:
819 pr_debug("%s: RNDIS_MSG_HALT\n",
820 __func__);
821 params->state = RNDIS_UNINITIALIZED;
822 if (params->dev) {
823 netif_carrier_off(params->dev);
824 netif_stop_queue(params->dev);
825 }
826 return 0;
827
828 case RNDIS_MSG_QUERY:
829 return rndis_query_response(params,
830 (rndis_query_msg_type *)buf);
831
832 case RNDIS_MSG_SET:
833 return rndis_set_response(params, (rndis_set_msg_type *)buf);
834
835 case RNDIS_MSG_RESET:
836 pr_debug("%s: RNDIS_MSG_RESET\n",
837 __func__);
838 return rndis_reset_response(params,
839 (rndis_reset_msg_type *)buf);
840
841 case RNDIS_MSG_KEEPALIVE:
842
843 if (rndis_debug > 1)
844 pr_debug("%s: RNDIS_MSG_KEEPALIVE\n",
845 __func__);
846 return rndis_keepalive_response(params,
847 (rndis_keepalive_msg_type *)
848 buf);
849
850 default:
851
852
853
854
855 pr_warn("%s: unknown RNDIS message 0x%08X len %d\n",
856 __func__, MsgType, MsgLength);
857 print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET,
858 buf, MsgLength);
859 break;
860 }
861
862 return -ENOTSUPP;
863}
864EXPORT_SYMBOL_GPL(rndis_msg_parser);
865
866static inline int rndis_get_nr(void)
867{
868 return ida_simple_get(&rndis_ida, 0, 0, GFP_KERNEL);
869}
870
871static inline void rndis_put_nr(int nr)
872{
873 ida_simple_remove(&rndis_ida, nr);
874}
875
876struct rndis_params *rndis_register(void (*resp_avail)(void *v), void *v)
877{
878 struct rndis_params *params;
879 int i;
880
881 if (!resp_avail)
882 return ERR_PTR(-EINVAL);
883
884 i = rndis_get_nr();
885 if (i < 0) {
886 pr_debug("failed\n");
887
888 return ERR_PTR(-ENODEV);
889 }
890
891 params = kzalloc(sizeof(*params), GFP_KERNEL);
892 if (!params) {
893 rndis_put_nr(i);
894
895 return ERR_PTR(-ENOMEM);
896 }
897
898#ifdef CONFIG_USB_GADGET_DEBUG_FILES
899 {
900 struct proc_dir_entry *proc_entry;
901 char name[20];
902
903 sprintf(name, NAME_TEMPLATE, i);
904 proc_entry = proc_create_data(name, 0660, NULL,
905 &rndis_proc_fops, params);
906 if (!proc_entry) {
907 kfree(params);
908 rndis_put_nr(i);
909
910 return ERR_PTR(-EIO);
911 }
912 }
913#endif
914
915 params->confignr = i;
916 params->used = 1;
917 params->state = RNDIS_UNINITIALIZED;
918 params->media_state = RNDIS_MEDIA_STATE_DISCONNECTED;
919 params->resp_avail = resp_avail;
920 params->v = v;
921 INIT_LIST_HEAD(¶ms->resp_queue);
922 pr_debug("%s: configNr = %d\n", __func__, i);
923
924 return params;
925}
926EXPORT_SYMBOL_GPL(rndis_register);
927
928void rndis_deregister(struct rndis_params *params)
929{
930 int i;
931
932 pr_debug("%s:\n", __func__);
933
934 if (!params)
935 return;
936
937 i = params->confignr;
938
939#ifdef CONFIG_USB_GADGET_DEBUG_FILES
940 {
941 char name[20];
942
943 sprintf(name, NAME_TEMPLATE, i);
944 remove_proc_entry(name, NULL);
945 }
946#endif
947
948 kfree(params);
949 rndis_put_nr(i);
950}
951EXPORT_SYMBOL_GPL(rndis_deregister);
952int rndis_set_param_dev(struct rndis_params *params, struct net_device *dev,
953 u16 *cdc_filter)
954{
955 pr_debug("%s:\n", __func__);
956 if (!dev)
957 return -EINVAL;
958 if (!params)
959 return -1;
960
961 params->dev = dev;
962 params->filter = cdc_filter;
963
964 return 0;
965}
966EXPORT_SYMBOL_GPL(rndis_set_param_dev);
967
968int rndis_set_param_vendor(struct rndis_params *params, u32 vendorID,
969 const char *vendorDescr)
970{
971 pr_debug("%s:\n", __func__);
972 if (!vendorDescr) return -1;
973 if (!params)
974 return -1;
975
976 params->vendorID = vendorID;
977 params->vendorDescr = vendorDescr;
978
979 return 0;
980}
981EXPORT_SYMBOL_GPL(rndis_set_param_vendor);
982
983int rndis_set_param_medium(struct rndis_params *params, u32 medium, u32 speed)
984{
985 pr_debug("%s: %u %u\n", __func__, medium, speed);
986 if (!params)
987 return -1;
988
989 params->medium = medium;
990 params->speed = speed;
991
992 return 0;
993}
994EXPORT_SYMBOL_GPL(rndis_set_param_medium);
995
996void rndis_add_hdr(struct sk_buff *skb)
997{
998 struct rndis_packet_msg_type *header;
999
1000 if (!skb)
1001 return;
1002 header = skb_push(skb, sizeof(*header));
1003 memset(header, 0, sizeof *header);
1004 header->MessageType = cpu_to_le32(RNDIS_MSG_PACKET);
1005 header->MessageLength = cpu_to_le32(skb->len);
1006 header->DataOffset = cpu_to_le32(36);
1007 header->DataLength = cpu_to_le32(skb->len - sizeof(*header));
1008}
1009EXPORT_SYMBOL_GPL(rndis_add_hdr);
1010
1011void rndis_free_response(struct rndis_params *params, u8 *buf)
1012{
1013 rndis_resp_t *r, *n;
1014
1015 list_for_each_entry_safe(r, n, ¶ms->resp_queue, list) {
1016 if (r->buf == buf) {
1017 list_del(&r->list);
1018 kfree(r);
1019 }
1020 }
1021}
1022EXPORT_SYMBOL_GPL(rndis_free_response);
1023
1024u8 *rndis_get_next_response(struct rndis_params *params, u32 *length)
1025{
1026 rndis_resp_t *r, *n;
1027
1028 if (!length) return NULL;
1029
1030 list_for_each_entry_safe(r, n, ¶ms->resp_queue, list) {
1031 if (!r->send) {
1032 r->send = 1;
1033 *length = r->length;
1034 return r->buf;
1035 }
1036 }
1037
1038 return NULL;
1039}
1040EXPORT_SYMBOL_GPL(rndis_get_next_response);
1041
1042static rndis_resp_t *rndis_add_response(struct rndis_params *params, u32 length)
1043{
1044 rndis_resp_t *r;
1045
1046
1047 r = kmalloc(sizeof(rndis_resp_t) + length, GFP_ATOMIC);
1048 if (!r) return NULL;
1049
1050 r->buf = (u8 *)(r + 1);
1051 r->length = length;
1052 r->send = 0;
1053
1054 list_add_tail(&r->list, ¶ms->resp_queue);
1055 return r;
1056}
1057
1058int rndis_rm_hdr(struct gether *port,
1059 struct sk_buff *skb,
1060 struct sk_buff_head *list)
1061{
1062
1063 __le32 *tmp = (void *)skb->data;
1064
1065
1066 if (cpu_to_le32(RNDIS_MSG_PACKET)
1067 != get_unaligned(tmp++)) {
1068 dev_kfree_skb_any(skb);
1069 return -EINVAL;
1070 }
1071 tmp++;
1072
1073
1074 if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8)) {
1075 dev_kfree_skb_any(skb);
1076 return -EOVERFLOW;
1077 }
1078 skb_trim(skb, get_unaligned_le32(tmp++));
1079
1080 skb_queue_tail(list, skb);
1081 return 0;
1082}
1083EXPORT_SYMBOL_GPL(rndis_rm_hdr);
1084
1085#ifdef CONFIG_USB_GADGET_DEBUG_FILES
1086
1087static int rndis_proc_show(struct seq_file *m, void *v)
1088{
1089 rndis_params *param = m->private;
1090
1091 seq_printf(m,
1092 "Config Nr. %d\n"
1093 "used : %s\n"
1094 "state : %s\n"
1095 "medium : 0x%08X\n"
1096 "speed : %d\n"
1097 "cable : %s\n"
1098 "vendor ID : 0x%08X\n"
1099 "vendor : %s\n",
1100 param->confignr, (param->used) ? "y" : "n",
1101 ({ char *s = "?";
1102 switch (param->state) {
1103 case RNDIS_UNINITIALIZED:
1104 s = "RNDIS_UNINITIALIZED"; break;
1105 case RNDIS_INITIALIZED:
1106 s = "RNDIS_INITIALIZED"; break;
1107 case RNDIS_DATA_INITIALIZED:
1108 s = "RNDIS_DATA_INITIALIZED"; break;
1109 } s; }),
1110 param->medium,
1111 (param->media_state) ? 0 : param->speed*100,
1112 (param->media_state) ? "disconnected" : "connected",
1113 param->vendorID, param->vendorDescr);
1114 return 0;
1115}
1116
1117static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
1118 size_t count, loff_t *ppos)
1119{
1120 rndis_params *p = PDE_DATA(file_inode(file));
1121 u32 speed = 0;
1122 int i, fl_speed = 0;
1123
1124 for (i = 0; i < count; i++) {
1125 char c;
1126 if (get_user(c, buffer))
1127 return -EFAULT;
1128 switch (c) {
1129 case '0':
1130 case '1':
1131 case '2':
1132 case '3':
1133 case '4':
1134 case '5':
1135 case '6':
1136 case '7':
1137 case '8':
1138 case '9':
1139 fl_speed = 1;
1140 speed = speed * 10 + c - '0';
1141 break;
1142 case 'C':
1143 case 'c':
1144 rndis_signal_connect(p);
1145 break;
1146 case 'D':
1147 case 'd':
1148 rndis_signal_disconnect(p);
1149 break;
1150 default:
1151 if (fl_speed) p->speed = speed;
1152 else pr_debug("%c is not valid\n", c);
1153 break;
1154 }
1155
1156 buffer++;
1157 }
1158
1159 return count;
1160}
1161
1162static int rndis_proc_open(struct inode *inode, struct file *file)
1163{
1164 return single_open(file, rndis_proc_show, PDE_DATA(inode));
1165}
1166
1167static const struct file_operations rndis_proc_fops = {
1168 .owner = THIS_MODULE,
1169 .open = rndis_proc_open,
1170 .read = seq_read,
1171 .llseek = seq_lseek,
1172 .release = single_release,
1173 .write = rndis_proc_write,
1174};
1175
1176#define NAME_TEMPLATE "driver/rndis-%03d"
1177
1178#endif
1179
