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Merge git://www.linux-watchdog.org/linux-watchdog
[linux/fpc-iii.git] / drivers / usb / gadget / rndis.c
blob3e3ea720303043c4df215143eb926f20179bb1d9
1 /*
2 * RNDIS MSG parser
3 *
4 * Authors: Benedikt Spranger, Pengutronix
5 * Robert Schwebel, Pengutronix
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2, as published by the Free Software Foundation.
10 *
11 * This software was originally developed in conformance with
12 * Microsoft's Remote NDIS Specification License Agreement.
13 *
14 * 03/12/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
15 * Fixed message length bug in init_response
16 *
17 * 03/25/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
18 * Fixed rndis_rm_hdr length bug.
19 *
20 * Copyright (C) 2004 by David Brownell
21 * updates to merge with Linux 2.6, better match RNDIS spec
22 */
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/kernel.h>
27 #include <linux/errno.h>
28 #include <linux/init.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
40 #undef VERBOSE_DEBUG
41
42 #include "rndis.h"
43
44
45 /* The driver for your USB chip needs to support ep0 OUT to work with
46 * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
47 *
48 * Windows hosts need an INF file like Documentation/usb/linux.inf
49 * and will be happier if you provide the host_addr module parameter.
50 */
51
52 #if 0
53 static int rndis_debug = 0;
54 module_param (rndis_debug, int, 0);
55 MODULE_PARM_DESC (rndis_debug, "enable debugging");
56 #else
57 #define rndis_debug 0
58 #endif
59
60 #define RNDIS_MAX_CONFIGS 1
61
62
63 static rndis_params rndis_per_dev_params[RNDIS_MAX_CONFIGS];
64
65 /* Driver Version */
66 static const __le32 rndis_driver_version = cpu_to_le32(1);
67
68 /* Function Prototypes */
69 static rndis_resp_t *rndis_add_response(int configNr, u32 length);
70
71
72 /* supported OIDs */
73 static const u32 oid_supported_list[] =
74 {
75 /* the general stuff */
76 RNDIS_OID_GEN_SUPPORTED_LIST,
77 RNDIS_OID_GEN_HARDWARE_STATUS,
78 RNDIS_OID_GEN_MEDIA_SUPPORTED,
79 RNDIS_OID_GEN_MEDIA_IN_USE,
80 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
81 RNDIS_OID_GEN_LINK_SPEED,
82 RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE,
83 RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE,
84 RNDIS_OID_GEN_VENDOR_ID,
85 RNDIS_OID_GEN_VENDOR_DESCRIPTION,
86 RNDIS_OID_GEN_VENDOR_DRIVER_VERSION,
87 RNDIS_OID_GEN_CURRENT_PACKET_FILTER,
88 RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE,
89 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
90 RNDIS_OID_GEN_PHYSICAL_MEDIUM,
91
92 /* the statistical stuff */
93 RNDIS_OID_GEN_XMIT_OK,
94 RNDIS_OID_GEN_RCV_OK,
95 RNDIS_OID_GEN_XMIT_ERROR,
96 RNDIS_OID_GEN_RCV_ERROR,
97 RNDIS_OID_GEN_RCV_NO_BUFFER,
98 #ifdef RNDIS_OPTIONAL_STATS
99 RNDIS_OID_GEN_DIRECTED_BYTES_XMIT,
100 RNDIS_OID_GEN_DIRECTED_FRAMES_XMIT,
101 RNDIS_OID_GEN_MULTICAST_BYTES_XMIT,
102 RNDIS_OID_GEN_MULTICAST_FRAMES_XMIT,
103 RNDIS_OID_GEN_BROADCAST_BYTES_XMIT,
104 RNDIS_OID_GEN_BROADCAST_FRAMES_XMIT,
105 RNDIS_OID_GEN_DIRECTED_BYTES_RCV,
106 RNDIS_OID_GEN_DIRECTED_FRAMES_RCV,
107 RNDIS_OID_GEN_MULTICAST_BYTES_RCV,
108 RNDIS_OID_GEN_MULTICAST_FRAMES_RCV,
109 RNDIS_OID_GEN_BROADCAST_BYTES_RCV,
110 RNDIS_OID_GEN_BROADCAST_FRAMES_RCV,
111 RNDIS_OID_GEN_RCV_CRC_ERROR,
112 RNDIS_OID_GEN_TRANSMIT_QUEUE_LENGTH,
113 #endif /* RNDIS_OPTIONAL_STATS */
114
115 /* mandatory 802.3 */
116 /* the general stuff */
117 RNDIS_OID_802_3_PERMANENT_ADDRESS,
118 RNDIS_OID_802_3_CURRENT_ADDRESS,
119 RNDIS_OID_802_3_MULTICAST_LIST,
120 RNDIS_OID_802_3_MAC_OPTIONS,
121 RNDIS_OID_802_3_MAXIMUM_LIST_SIZE,
122
123 /* the statistical stuff */
124 RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT,
125 RNDIS_OID_802_3_XMIT_ONE_COLLISION,
126 RNDIS_OID_802_3_XMIT_MORE_COLLISIONS,
127 #ifdef RNDIS_OPTIONAL_STATS
128 RNDIS_OID_802_3_XMIT_DEFERRED,
129 RNDIS_OID_802_3_XMIT_MAX_COLLISIONS,
130 RNDIS_OID_802_3_RCV_OVERRUN,
131 RNDIS_OID_802_3_XMIT_UNDERRUN,
132 RNDIS_OID_802_3_XMIT_HEARTBEAT_FAILURE,
133 RNDIS_OID_802_3_XMIT_TIMES_CRS_LOST,
134 RNDIS_OID_802_3_XMIT_LATE_COLLISIONS,
135 #endif /* RNDIS_OPTIONAL_STATS */
136
137 #ifdef RNDIS_PM
138 /* PM and wakeup are "mandatory" for USB, but the RNDIS specs
139 * don't say what they mean ... and the NDIS specs are often
140 * confusing and/or ambiguous in this context. (That is, more
141 * so than their specs for the other OIDs.)
142 *
143 * FIXME someone who knows what these should do, please
144 * implement them!
145 */
146
147 /* power management */
148 OID_PNP_CAPABILITIES,
149 OID_PNP_QUERY_POWER,
150 OID_PNP_SET_POWER,
151
152 #ifdef RNDIS_WAKEUP
153 /* wake up host */
154 OID_PNP_ENABLE_WAKE_UP,
155 OID_PNP_ADD_WAKE_UP_PATTERN,
156 OID_PNP_REMOVE_WAKE_UP_PATTERN,
157 #endif /* RNDIS_WAKEUP */
158 #endif /* RNDIS_PM */
159 };
160
161
162 /* NDIS Functions */
163 static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
164 unsigned buf_len, rndis_resp_t *r)
165 {
166 int retval = -ENOTSUPP;
167 u32 length = 4; /* usually */
168 __le32 *outbuf;
169 int i, count;
170 rndis_query_cmplt_type *resp;
171 struct net_device *net;
172 struct rtnl_link_stats64 temp;
173 const struct rtnl_link_stats64 *stats;
174
175 if (!r) return -ENOMEM;
176 resp = (rndis_query_cmplt_type *)r->buf;
177
178 if (!resp) return -ENOMEM;
179
180 if (buf_len && rndis_debug > 1) {
181 pr_debug("query OID %08x value, len %d:\n", OID, buf_len);
182 for (i = 0; i < buf_len; i += 16) {
183 pr_debug("%03d: %08x %08x %08x %08x\n", i,
184 get_unaligned_le32(&buf[i]),
185 get_unaligned_le32(&buf[i + 4]),
186 get_unaligned_le32(&buf[i + 8]),
187 get_unaligned_le32(&buf[i + 12]));
188 }
189 }
190
191 /* response goes here, right after the header */
192 outbuf = (__le32 *)&resp[1];
193 resp->InformationBufferOffset = cpu_to_le32(16);
194
195 net = rndis_per_dev_params[configNr].dev;
196 stats = dev_get_stats(net, &temp);
197
198 switch (OID) {
199
200 /* general oids (table 4-1) */
201
202 /* mandatory */
203 case RNDIS_OID_GEN_SUPPORTED_LIST:
204 pr_debug("%s: RNDIS_OID_GEN_SUPPORTED_LIST\n", __func__);
205 length = sizeof(oid_supported_list);
206 count = length / sizeof(u32);
207 for (i = 0; i < count; i++)
208 outbuf[i] = cpu_to_le32(oid_supported_list[i]);
209 retval = 0;
210 break;
211
212 /* mandatory */
213 case RNDIS_OID_GEN_HARDWARE_STATUS:
214 pr_debug("%s: RNDIS_OID_GEN_HARDWARE_STATUS\n", __func__);
215 /* Bogus question!
216 * Hardware must be ready to receive high level protocols.
217 * BTW:
218 * reddite ergo quae sunt Caesaris Caesari
219 * et quae sunt Dei Deo!
220 */
221 *outbuf = cpu_to_le32(0);
222 retval = 0;
223 break;
224
225 /* mandatory */
226 case RNDIS_OID_GEN_MEDIA_SUPPORTED:
227 pr_debug("%s: RNDIS_OID_GEN_MEDIA_SUPPORTED\n", __func__);
228 *outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
229 retval = 0;
230 break;
231
232 /* mandatory */
233 case RNDIS_OID_GEN_MEDIA_IN_USE:
234 pr_debug("%s: RNDIS_OID_GEN_MEDIA_IN_USE\n", __func__);
235 /* one medium, one transport... (maybe you do it better) */
236 *outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
237 retval = 0;
238 break;
239
240 /* mandatory */
241 case RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE:
242 pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
243 if (rndis_per_dev_params[configNr].dev) {
244 *outbuf = cpu_to_le32(
245 rndis_per_dev_params[configNr].dev->mtu);
246 retval = 0;
247 }
248 break;
249
250 /* mandatory */
251 case RNDIS_OID_GEN_LINK_SPEED:
252 if (rndis_debug > 1)
253 pr_debug("%s: RNDIS_OID_GEN_LINK_SPEED\n", __func__);
254 if (rndis_per_dev_params[configNr].media_state
255 == RNDIS_MEDIA_STATE_DISCONNECTED)
256 *outbuf = cpu_to_le32(0);
257 else
258 *outbuf = cpu_to_le32(
259 rndis_per_dev_params[configNr].speed);
260 retval = 0;
261 break;
262
263 /* mandatory */
264 case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE:
265 pr_debug("%s: RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
266 if (rndis_per_dev_params[configNr].dev) {
267 *outbuf = cpu_to_le32(
268 rndis_per_dev_params[configNr].dev->mtu);
269 retval = 0;
270 }
271 break;
272
273 /* mandatory */
274 case RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE:
275 pr_debug("%s: RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
276 if (rndis_per_dev_params[configNr].dev) {
277 *outbuf = cpu_to_le32(
278 rndis_per_dev_params[configNr].dev->mtu);
279 retval = 0;
280 }
281 break;
282
283 /* mandatory */
284 case RNDIS_OID_GEN_VENDOR_ID:
285 pr_debug("%s: RNDIS_OID_GEN_VENDOR_ID\n", __func__);
286 *outbuf = cpu_to_le32(
287 rndis_per_dev_params[configNr].vendorID);
288 retval = 0;
289 break;
290
291 /* mandatory */
292 case RNDIS_OID_GEN_VENDOR_DESCRIPTION:
293 pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__);
294 if (rndis_per_dev_params[configNr].vendorDescr) {
295 length = strlen(rndis_per_dev_params[configNr].
296 vendorDescr);
297 memcpy(outbuf,
298 rndis_per_dev_params[configNr].vendorDescr,
299 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 /* Created as LE */
309 *outbuf = rndis_driver_version;
310 retval = 0;
311 break;
312
313 /* mandatory */
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(*rndis_per_dev_params[configNr].filter);
317 retval = 0;
318 break;
319
320 /* mandatory */
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 /* mandatory */
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(rndis_per_dev_params[configNr]
332 .media_state);
333 retval = 0;
334 break;
335
336 case RNDIS_OID_GEN_PHYSICAL_MEDIUM:
337 pr_debug("%s: RNDIS_OID_GEN_PHYSICAL_MEDIUM\n", __func__);
338 *outbuf = cpu_to_le32(0);
339 retval = 0;
340 break;
341
342 /* The RNDIS specification is incomplete/wrong. Some versions
343 * of MS-Windows expect OIDs that aren't specified there. Other
344 * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
345 */
346 case RNDIS_OID_GEN_MAC_OPTIONS: /* from WinME */
347 pr_debug("%s: RNDIS_OID_GEN_MAC_OPTIONS\n", __func__);
348 *outbuf = cpu_to_le32(
349 RNDIS_MAC_OPTION_RECEIVE_SERIALIZED
350 | RNDIS_MAC_OPTION_FULL_DUPLEX);
351 retval = 0;
352 break;
353
354 /* statistics OIDs (table 4-2) */
355
356 /* mandatory */
357 case RNDIS_OID_GEN_XMIT_OK:
358 if (rndis_debug > 1)
359 pr_debug("%s: RNDIS_OID_GEN_XMIT_OK\n", __func__);
360 if (stats) {
361 *outbuf = cpu_to_le32(stats->tx_packets
362 - stats->tx_errors - stats->tx_dropped);
363 retval = 0;
364 }
365 break;
366
367 /* mandatory */
368 case RNDIS_OID_GEN_RCV_OK:
369 if (rndis_debug > 1)
370 pr_debug("%s: RNDIS_OID_GEN_RCV_OK\n", __func__);
371 if (stats) {
372 *outbuf = cpu_to_le32(stats->rx_packets
373 - stats->rx_errors - stats->rx_dropped);
374 retval = 0;
375 }
376 break;
377
378 /* mandatory */
379 case RNDIS_OID_GEN_XMIT_ERROR:
380 if (rndis_debug > 1)
381 pr_debug("%s: RNDIS_OID_GEN_XMIT_ERROR\n", __func__);
382 if (stats) {
383 *outbuf = cpu_to_le32(stats->tx_errors);
384 retval = 0;
385 }
386 break;
387
388 /* mandatory */
389 case RNDIS_OID_GEN_RCV_ERROR:
390 if (rndis_debug > 1)
391 pr_debug("%s: RNDIS_OID_GEN_RCV_ERROR\n", __func__);
392 if (stats) {
393 *outbuf = cpu_to_le32(stats->rx_errors);
394 retval = 0;
395 }
396 break;
397
398 /* mandatory */
399 case RNDIS_OID_GEN_RCV_NO_BUFFER:
400 pr_debug("%s: RNDIS_OID_GEN_RCV_NO_BUFFER\n", __func__);
401 if (stats) {
402 *outbuf = cpu_to_le32(stats->rx_dropped);
403 retval = 0;
404 }
405 break;
406
407 /* ieee802.3 OIDs (table 4-3) */
408
409 /* mandatory */
410 case RNDIS_OID_802_3_PERMANENT_ADDRESS:
411 pr_debug("%s: RNDIS_OID_802_3_PERMANENT_ADDRESS\n", __func__);
412 if (rndis_per_dev_params[configNr].dev) {
413 length = ETH_ALEN;
414 memcpy(outbuf,
415 rndis_per_dev_params[configNr].host_mac,
416 length);
417 retval = 0;
418 }
419 break;
420
421 /* mandatory */
422 case RNDIS_OID_802_3_CURRENT_ADDRESS:
423 pr_debug("%s: RNDIS_OID_802_3_CURRENT_ADDRESS\n", __func__);
424 if (rndis_per_dev_params[configNr].dev) {
425 length = ETH_ALEN;
426 memcpy(outbuf,
427 rndis_per_dev_params [configNr].host_mac,
428 length);
429 retval = 0;
430 }
431 break;
432
433 /* mandatory */
434 case RNDIS_OID_802_3_MULTICAST_LIST:
435 pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
436 /* Multicast base address only */
437 *outbuf = cpu_to_le32(0xE0000000);
438 retval = 0;
439 break;
440
441 /* mandatory */
442 case RNDIS_OID_802_3_MAXIMUM_LIST_SIZE:
443 pr_debug("%s: RNDIS_OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
444 /* Multicast base address only */
445 *outbuf = cpu_to_le32(1);
446 retval = 0;
447 break;
448
449 case RNDIS_OID_802_3_MAC_OPTIONS:
450 pr_debug("%s: RNDIS_OID_802_3_MAC_OPTIONS\n", __func__);
451 *outbuf = cpu_to_le32(0);
452 retval = 0;
453 break;
454
455 /* ieee802.3 statistics OIDs (table 4-4) */
456
457 /* mandatory */
458 case RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT:
459 pr_debug("%s: RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
460 if (stats) {
461 *outbuf = cpu_to_le32(stats->rx_frame_errors);
462 retval = 0;
463 }
464 break;
465
466 /* mandatory */
467 case RNDIS_OID_802_3_XMIT_ONE_COLLISION:
468 pr_debug("%s: RNDIS_OID_802_3_XMIT_ONE_COLLISION\n", __func__);
469 *outbuf = cpu_to_le32(0);
470 retval = 0;
471 break;
472
473 /* mandatory */
474 case RNDIS_OID_802_3_XMIT_MORE_COLLISIONS:
475 pr_debug("%s: RNDIS_OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
476 *outbuf = cpu_to_le32(0);
477 retval = 0;
478 break;
479
480 default:
481 pr_warning("%s: query unknown OID 0x%08X\n",
482 __func__, OID);
483 }
484 if (retval < 0)
485 length = 0;
486
487 resp->InformationBufferLength = cpu_to_le32(length);
488 r->length = length + sizeof(*resp);
489 resp->MessageLength = cpu_to_le32(r->length);
490 return retval;
491 }
492
493 static int gen_ndis_set_resp(u8 configNr, u32 OID, u8 *buf, u32 buf_len,
494 rndis_resp_t *r)
495 {
496 rndis_set_cmplt_type *resp;
497 int i, retval = -ENOTSUPP;
498 struct rndis_params *params;
499
500 if (!r)
501 return -ENOMEM;
502 resp = (rndis_set_cmplt_type *)r->buf;
503 if (!resp)
504 return -ENOMEM;
505
506 if (buf_len && rndis_debug > 1) {
507 pr_debug("set OID %08x value, len %d:\n", OID, buf_len);
508 for (i = 0; i < buf_len; i += 16) {
509 pr_debug("%03d: %08x %08x %08x %08x\n", i,
510 get_unaligned_le32(&buf[i]),
511 get_unaligned_le32(&buf[i + 4]),
512 get_unaligned_le32(&buf[i + 8]),
513 get_unaligned_le32(&buf[i + 12]));
514 }
515 }
516
517 params = &rndis_per_dev_params[configNr];
518 switch (OID) {
519 case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
520
521 /* these NDIS_PACKET_TYPE_* bitflags are shared with
522 * cdc_filter; it's not RNDIS-specific
523 * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
524 * PROMISCUOUS, DIRECTED,
525 * MULTICAST, ALL_MULTICAST, BROADCAST
526 */
527 *params->filter = (u16)get_unaligned_le32(buf);
528 pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER %08x\n",
529 __func__, *params->filter);
530
531 /* this call has a significant side effect: it's
532 * what makes the packet flow start and stop, like
533 * activating the CDC Ethernet altsetting.
534 */
535 retval = 0;
536 if (*params->filter) {
537 params->state = RNDIS_DATA_INITIALIZED;
538 netif_carrier_on(params->dev);
539 if (netif_running(params->dev))
540 netif_wake_queue(params->dev);
541 } else {
542 params->state = RNDIS_INITIALIZED;
543 netif_carrier_off(params->dev);
544 netif_stop_queue(params->dev);
545 }
546 break;
547
548 case RNDIS_OID_802_3_MULTICAST_LIST:
549 /* I think we can ignore this */
550 pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
551 retval = 0;
552 break;
553
554 default:
555 pr_warning("%s: set unknown OID 0x%08X, size %d\n",
556 __func__, OID, buf_len);
557 }
558
559 return retval;
560 }
561
562 /*
563 * Response Functions
564 */
565
566 static int rndis_init_response(int configNr, rndis_init_msg_type *buf)
567 {
568 rndis_init_cmplt_type *resp;
569 rndis_resp_t *r;
570 struct rndis_params *params = rndis_per_dev_params + configNr;
571
572 if (!params->dev)
573 return -ENOTSUPP;
574
575 r = rndis_add_response(configNr, sizeof(rndis_init_cmplt_type));
576 if (!r)
577 return -ENOMEM;
578 resp = (rndis_init_cmplt_type *)r->buf;
579
580 resp->MessageType = cpu_to_le32(RNDIS_MSG_INIT_C);
581 resp->MessageLength = cpu_to_le32(52);
582 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
583 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
584 resp->MajorVersion = cpu_to_le32(RNDIS_MAJOR_VERSION);
585 resp->MinorVersion = cpu_to_le32(RNDIS_MINOR_VERSION);
586 resp->DeviceFlags = cpu_to_le32(RNDIS_DF_CONNECTIONLESS);
587 resp->Medium = cpu_to_le32(RNDIS_MEDIUM_802_3);
588 resp->MaxPacketsPerTransfer = cpu_to_le32(1);
589 resp->MaxTransferSize = cpu_to_le32(
590 params->dev->mtu
591 + sizeof(struct ethhdr)
592 + sizeof(struct rndis_packet_msg_type)
593 + 22);
594 resp->PacketAlignmentFactor = cpu_to_le32(0);
595 resp->AFListOffset = cpu_to_le32(0);
596 resp->AFListSize = cpu_to_le32(0);
597
598 params->resp_avail(params->v);
599 return 0;
600 }
601
602 static int rndis_query_response(int configNr, rndis_query_msg_type *buf)
603 {
604 rndis_query_cmplt_type *resp;
605 rndis_resp_t *r;
606 struct rndis_params *params = rndis_per_dev_params + configNr;
607
608 /* pr_debug("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID)); */
609 if (!params->dev)
610 return -ENOTSUPP;
611
612 /*
613 * we need more memory:
614 * gen_ndis_query_resp expects enough space for
615 * rndis_query_cmplt_type followed by data.
616 * oid_supported_list is the largest data reply
617 */
618 r = rndis_add_response(configNr,
619 sizeof(oid_supported_list) + sizeof(rndis_query_cmplt_type));
620 if (!r)
621 return -ENOMEM;
622 resp = (rndis_query_cmplt_type *)r->buf;
623
624 resp->MessageType = cpu_to_le32(RNDIS_MSG_QUERY_C);
625 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
626
627 if (gen_ndis_query_resp(configNr, le32_to_cpu(buf->OID),
628 le32_to_cpu(buf->InformationBufferOffset)
629 + 8 + (u8 *)buf,
630 le32_to_cpu(buf->InformationBufferLength),
631 r)) {
632 /* OID not supported */
633 resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
634 resp->MessageLength = cpu_to_le32(sizeof *resp);
635 resp->InformationBufferLength = cpu_to_le32(0);
636 resp->InformationBufferOffset = cpu_to_le32(0);
637 } else
638 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
639
640 params->resp_avail(params->v);
641 return 0;
642 }
643
644 static int rndis_set_response(int configNr, rndis_set_msg_type *buf)
645 {
646 u32 BufLength, BufOffset;
647 rndis_set_cmplt_type *resp;
648 rndis_resp_t *r;
649 struct rndis_params *params = rndis_per_dev_params + configNr;
650
651 r = rndis_add_response(configNr, sizeof(rndis_set_cmplt_type));
652 if (!r)
653 return -ENOMEM;
654 resp = (rndis_set_cmplt_type *)r->buf;
655
656 BufLength = le32_to_cpu(buf->InformationBufferLength);
657 BufOffset = le32_to_cpu(buf->InformationBufferOffset);
658
659 #ifdef VERBOSE_DEBUG
660 pr_debug("%s: Length: %d\n", __func__, BufLength);
661 pr_debug("%s: Offset: %d\n", __func__, BufOffset);
662 pr_debug("%s: InfoBuffer: ", __func__);
663
664 for (i = 0; i < BufLength; i++) {
665 pr_debug("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
666 }
667
668 pr_debug("\n");
669 #endif
670
671 resp->MessageType = cpu_to_le32(RNDIS_MSG_SET_C);
672 resp->MessageLength = cpu_to_le32(16);
673 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
674 if (gen_ndis_set_resp(configNr, le32_to_cpu(buf->OID),
675 ((u8 *)buf) + 8 + BufOffset, BufLength, r))
676 resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
677 else
678 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
679
680 params->resp_avail(params->v);
681 return 0;
682 }
683
684 static int rndis_reset_response(int configNr, rndis_reset_msg_type *buf)
685 {
686 rndis_reset_cmplt_type *resp;
687 rndis_resp_t *r;
688 struct rndis_params *params = rndis_per_dev_params + configNr;
689
690 r = rndis_add_response(configNr, sizeof(rndis_reset_cmplt_type));
691 if (!r)
692 return -ENOMEM;
693 resp = (rndis_reset_cmplt_type *)r->buf;
694
695 resp->MessageType = cpu_to_le32(RNDIS_MSG_RESET_C);
696 resp->MessageLength = cpu_to_le32(16);
697 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
698 /* resent information */
699 resp->AddressingReset = cpu_to_le32(1);
700
701 params->resp_avail(params->v);
702 return 0;
703 }
704
705 static int rndis_keepalive_response(int configNr,
706 rndis_keepalive_msg_type *buf)
707 {
708 rndis_keepalive_cmplt_type *resp;
709 rndis_resp_t *r;
710 struct rndis_params *params = rndis_per_dev_params + configNr;
711
712 /* host "should" check only in RNDIS_DATA_INITIALIZED state */
713
714 r = rndis_add_response(configNr, sizeof(rndis_keepalive_cmplt_type));
715 if (!r)
716 return -ENOMEM;
717 resp = (rndis_keepalive_cmplt_type *)r->buf;
718
719 resp->MessageType = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
720 resp->MessageLength = cpu_to_le32(16);
721 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
722 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
723
724 params->resp_avail(params->v);
725 return 0;
726 }
727
728
729 /*
730 * Device to Host Comunication
731 */
732 static int rndis_indicate_status_msg(int configNr, u32 status)
733 {
734 rndis_indicate_status_msg_type *resp;
735 rndis_resp_t *r;
736 struct rndis_params *params = rndis_per_dev_params + configNr;
737
738 if (params->state == RNDIS_UNINITIALIZED)
739 return -ENOTSUPP;
740
741 r = rndis_add_response(configNr,
742 sizeof(rndis_indicate_status_msg_type));
743 if (!r)
744 return -ENOMEM;
745 resp = (rndis_indicate_status_msg_type *)r->buf;
746
747 resp->MessageType = cpu_to_le32(RNDIS_MSG_INDICATE);
748 resp->MessageLength = cpu_to_le32(20);
749 resp->Status = cpu_to_le32(status);
750 resp->StatusBufferLength = cpu_to_le32(0);
751 resp->StatusBufferOffset = cpu_to_le32(0);
752
753 params->resp_avail(params->v);
754 return 0;
755 }
756
757 int rndis_signal_connect(int configNr)
758 {
759 rndis_per_dev_params[configNr].media_state
760 = RNDIS_MEDIA_STATE_CONNECTED;
761 return rndis_indicate_status_msg(configNr,
762 RNDIS_STATUS_MEDIA_CONNECT);
763 }
764 EXPORT_SYMBOL(rndis_signal_connect);
765
766 int rndis_signal_disconnect(int configNr)
767 {
768 rndis_per_dev_params[configNr].media_state
769 = RNDIS_MEDIA_STATE_DISCONNECTED;
770 return rndis_indicate_status_msg(configNr,
771 RNDIS_STATUS_MEDIA_DISCONNECT);
772 }
773 EXPORT_SYMBOL(rndis_signal_disconnect);
774
775 void rndis_uninit(int configNr)
776 {
777 u8 *buf;
778 u32 length;
779
780 if (configNr >= RNDIS_MAX_CONFIGS)
781 return;
782 rndis_per_dev_params[configNr].state = RNDIS_UNINITIALIZED;
783
784 /* drain the response queue */
785 while ((buf = rndis_get_next_response(configNr, &length)))
786 rndis_free_response(configNr, buf);
787 }
788 EXPORT_SYMBOL(rndis_uninit);
789
790 void rndis_set_host_mac(int configNr, const u8 *addr)
791 {
792 rndis_per_dev_params[configNr].host_mac = addr;
793 }
794 EXPORT_SYMBOL(rndis_set_host_mac);
795
796 /*
797 * Message Parser
798 */
799 int rndis_msg_parser(u8 configNr, u8 *buf)
800 {
801 u32 MsgType, MsgLength;
802 __le32 *tmp;
803 struct rndis_params *params;
804
805 if (!buf)
806 return -ENOMEM;
807
808 tmp = (__le32 *)buf;
809 MsgType = get_unaligned_le32(tmp++);
810 MsgLength = get_unaligned_le32(tmp++);
811
812 if (configNr >= RNDIS_MAX_CONFIGS)
813 return -ENOTSUPP;
814 params = &rndis_per_dev_params[configNr];
815
816 /* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
817 * rx/tx statistics and link status, in addition to KEEPALIVE traffic
818 * and normal HC level polling to see if there's any IN traffic.
819 */
820
821 /* For USB: responses may take up to 10 seconds */
822 switch (MsgType) {
823 case RNDIS_MSG_INIT:
824 pr_debug("%s: RNDIS_MSG_INIT\n",
825 __func__);
826 params->state = RNDIS_INITIALIZED;
827 return rndis_init_response(configNr,
828 (rndis_init_msg_type *)buf);
829
830 case RNDIS_MSG_HALT:
831 pr_debug("%s: RNDIS_MSG_HALT\n",
832 __func__);
833 params->state = RNDIS_UNINITIALIZED;
834 if (params->dev) {
835 netif_carrier_off(params->dev);
836 netif_stop_queue(params->dev);
837 }
838 return 0;
839
840 case RNDIS_MSG_QUERY:
841 return rndis_query_response(configNr,
842 (rndis_query_msg_type *)buf);
843
844 case RNDIS_MSG_SET:
845 return rndis_set_response(configNr,
846 (rndis_set_msg_type *)buf);
847
848 case RNDIS_MSG_RESET:
849 pr_debug("%s: RNDIS_MSG_RESET\n",
850 __func__);
851 return rndis_reset_response(configNr,
852 (rndis_reset_msg_type *)buf);
853
854 case RNDIS_MSG_KEEPALIVE:
855 /* For USB: host does this every 5 seconds */
856 if (rndis_debug > 1)
857 pr_debug("%s: RNDIS_MSG_KEEPALIVE\n",
858 __func__);
859 return rndis_keepalive_response(configNr,
860 (rndis_keepalive_msg_type *)
861 buf);
862
863 default:
864 /* At least Windows XP emits some undefined RNDIS messages.
865 * In one case those messages seemed to relate to the host
866 * suspending itself.
867 */
868 pr_warning("%s: unknown RNDIS message 0x%08X len %d\n",
869 __func__, MsgType, MsgLength);
870 print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET,
871 buf, MsgLength);
872 break;
873 }
874
875 return -ENOTSUPP;
876 }
877 EXPORT_SYMBOL(rndis_msg_parser);
878
879 int rndis_register(void (*resp_avail)(void *v), void *v)
880 {
881 u8 i;
882
883 if (!resp_avail)
884 return -EINVAL;
885
886 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
887 if (!rndis_per_dev_params[i].used) {
888 rndis_per_dev_params[i].used = 1;
889 rndis_per_dev_params[i].resp_avail = resp_avail;
890 rndis_per_dev_params[i].v = v;
891 pr_debug("%s: configNr = %d\n", __func__, i);
892 return i;
893 }
894 }
895 pr_debug("failed\n");
896
897 return -ENODEV;
898 }
899 EXPORT_SYMBOL(rndis_register);
900
901 void rndis_deregister(int configNr)
902 {
903 pr_debug("%s:\n", __func__);
904
905 if (configNr >= RNDIS_MAX_CONFIGS) return;
906 rndis_per_dev_params[configNr].used = 0;
907 }
908 EXPORT_SYMBOL(rndis_deregister);
909
910 int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
911 {
912 pr_debug("%s:\n", __func__);
913 if (!dev)
914 return -EINVAL;
915 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
916
917 rndis_per_dev_params[configNr].dev = dev;
918 rndis_per_dev_params[configNr].filter = cdc_filter;
919
920 return 0;
921 }
922 EXPORT_SYMBOL(rndis_set_param_dev);
923
924 int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr)
925 {
926 pr_debug("%s:\n", __func__);
927 if (!vendorDescr) return -1;
928 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
929
930 rndis_per_dev_params[configNr].vendorID = vendorID;
931 rndis_per_dev_params[configNr].vendorDescr = vendorDescr;
932
933 return 0;
934 }
935 EXPORT_SYMBOL(rndis_set_param_vendor);
936
937 int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed)
938 {
939 pr_debug("%s: %u %u\n", __func__, medium, speed);
940 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
941
942 rndis_per_dev_params[configNr].medium = medium;
943 rndis_per_dev_params[configNr].speed = speed;
944
945 return 0;
946 }
947 EXPORT_SYMBOL(rndis_set_param_medium);
948
949 void rndis_add_hdr(struct sk_buff *skb)
950 {
951 struct rndis_packet_msg_type *header;
952
953 if (!skb)
954 return;
955 header = (void *)skb_push(skb, sizeof(*header));
956 memset(header, 0, sizeof *header);
957 header->MessageType = cpu_to_le32(RNDIS_MSG_PACKET);
958 header->MessageLength = cpu_to_le32(skb->len);
959 header->DataOffset = cpu_to_le32(36);
960 header->DataLength = cpu_to_le32(skb->len - sizeof(*header));
961 }
962 EXPORT_SYMBOL(rndis_add_hdr);
963
964 void rndis_free_response(int configNr, u8 *buf)
965 {
966 rndis_resp_t *r;
967 struct list_head *act, *tmp;
968
969 list_for_each_safe(act, tmp,
970 &(rndis_per_dev_params[configNr].resp_queue))
971 {
972 r = list_entry(act, rndis_resp_t, list);
973 if (r && r->buf == buf) {
974 list_del(&r->list);
975 kfree(r);
976 }
977 }
978 }
979 EXPORT_SYMBOL(rndis_free_response);
980
981 u8 *rndis_get_next_response(int configNr, u32 *length)
982 {
983 rndis_resp_t *r;
984 struct list_head *act, *tmp;
985
986 if (!length) return NULL;
987
988 list_for_each_safe(act, tmp,
989 &(rndis_per_dev_params[configNr].resp_queue))
990 {
991 r = list_entry(act, rndis_resp_t, list);
992 if (!r->send) {
993 r->send = 1;
994 *length = r->length;
995 return r->buf;
996 }
997 }
998
999 return NULL;
1000 }
1001 EXPORT_SYMBOL(rndis_get_next_response);
1002
1003 static rndis_resp_t *rndis_add_response(int configNr, u32 length)
1004 {
1005 rndis_resp_t *r;
1006
1007 /* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */
1008 r = kmalloc(sizeof(rndis_resp_t) + length, GFP_ATOMIC);
1009 if (!r) return NULL;
1010
1011 r->buf = (u8 *)(r + 1);
1012 r->length = length;
1013 r->send = 0;
1014
1015 list_add_tail(&r->list,
1016 &(rndis_per_dev_params[configNr].resp_queue));
1017 return r;
1018 }
1019
1020 int rndis_rm_hdr(struct gether *port,
1021 struct sk_buff *skb,
1022 struct sk_buff_head *list)
1023 {
1024 /* tmp points to a struct rndis_packet_msg_type */
1025 __le32 *tmp = (void *)skb->data;
1026
1027 /* MessageType, MessageLength */
1028 if (cpu_to_le32(RNDIS_MSG_PACKET)
1029 != get_unaligned(tmp++)) {
1030 dev_kfree_skb_any(skb);
1031 return -EINVAL;
1032 }
1033 tmp++;
1034
1035 /* DataOffset, DataLength */
1036 if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8)) {
1037 dev_kfree_skb_any(skb);
1038 return -EOVERFLOW;
1039 }
1040 skb_trim(skb, get_unaligned_le32(tmp++));
1041
1042 skb_queue_tail(list, skb);
1043 return 0;
1044 }
1045 EXPORT_SYMBOL(rndis_rm_hdr);
1046
1047 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1048
1049 static int rndis_proc_show(struct seq_file *m, void *v)
1050 {
1051 rndis_params *param = m->private;
1052
1053 seq_printf(m,
1054 "Config Nr. %d\n"
1055 "used : %s\n"
1056 "state : %s\n"
1057 "medium : 0x%08X\n"
1058 "speed : %d\n"
1059 "cable : %s\n"
1060 "vendor ID : 0x%08X\n"
1061 "vendor : %s\n",
1062 param->confignr, (param->used) ? "y" : "n",
1063 ({ char *s = "?";
1064 switch (param->state) {
1065 case RNDIS_UNINITIALIZED:
1066 s = "RNDIS_UNINITIALIZED"; break;
1067 case RNDIS_INITIALIZED:
1068 s = "RNDIS_INITIALIZED"; break;
1069 case RNDIS_DATA_INITIALIZED:
1070 s = "RNDIS_DATA_INITIALIZED"; break;
1071 }; s; }),
1072 param->medium,
1073 (param->media_state) ? 0 : param->speed*100,
1074 (param->media_state) ? "disconnected" : "connected",
1075 param->vendorID, param->vendorDescr);
1076 return 0;
1077 }
1078
1079 static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
1080 size_t count, loff_t *ppos)
1081 {
1082 rndis_params *p = PDE_DATA(file_inode(file));
1083 u32 speed = 0;
1084 int i, fl_speed = 0;
1085
1086 for (i = 0; i < count; i++) {
1087 char c;
1088 if (get_user(c, buffer))
1089 return -EFAULT;
1090 switch (c) {
1091 case '0':
1092 case '1':
1093 case '2':
1094 case '3':
1095 case '4':
1096 case '5':
1097 case '6':
1098 case '7':
1099 case '8':
1100 case '9':
1101 fl_speed = 1;
1102 speed = speed * 10 + c - '0';
1103 break;
1104 case 'C':
1105 case 'c':
1106 rndis_signal_connect(p->confignr);
1107 break;
1108 case 'D':
1109 case 'd':
1110 rndis_signal_disconnect(p->confignr);
1111 break;
1112 default:
1113 if (fl_speed) p->speed = speed;
1114 else pr_debug("%c is not valid\n", c);
1115 break;
1116 }
1117
1118 buffer++;
1119 }
1120
1121 return count;
1122 }
1123
1124 static int rndis_proc_open(struct inode *inode, struct file *file)
1125 {
1126 return single_open(file, rndis_proc_show, PDE_DATA(inode));
1127 }
1128
1129 static const struct file_operations rndis_proc_fops = {
1130 .owner = THIS_MODULE,
1131 .open = rndis_proc_open,
1132 .read = seq_read,
1133 .llseek = seq_lseek,
1134 .release = single_release,
1135 .write = rndis_proc_write,
1136 };
1137
1138 #define NAME_TEMPLATE "driver/rndis-%03d"
1139
1140 static struct proc_dir_entry *rndis_connect_state [RNDIS_MAX_CONFIGS];
1141
1142 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
1143
1144
1145 int rndis_init(void)
1146 {
1147 u8 i;
1148
1149 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
1150 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1151 char name [20];
1152
1153 sprintf(name, NAME_TEMPLATE, i);
1154 rndis_connect_state[i] = proc_create_data(name, 0660, NULL,
1155 &rndis_proc_fops,
1156 (void *)(rndis_per_dev_params + i));
1157 if (!rndis_connect_state[i]) {
1158 pr_debug("%s: remove entries", __func__);
1159 while (i) {
1160 sprintf(name, NAME_TEMPLATE, --i);
1161 remove_proc_entry(name, NULL);
1162 }
1163 pr_debug("\n");
1164 return -EIO;
1165 }
1166 #endif
1167 rndis_per_dev_params[i].confignr = i;
1168 rndis_per_dev_params[i].used = 0;
1169 rndis_per_dev_params[i].state = RNDIS_UNINITIALIZED;
1170 rndis_per_dev_params[i].media_state
1171 = RNDIS_MEDIA_STATE_DISCONNECTED;
1172 INIT_LIST_HEAD(&(rndis_per_dev_params[i].resp_queue));
1173 }
1174
1175 return 0;
1176 }
1177 module_init(rndis_init);
1178
1179 void rndis_exit(void)
1180 {
1181 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1182 u8 i;
1183 char name[20];
1184
1185 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
1186 sprintf(name, NAME_TEMPLATE, i);
1187 remove_proc_entry(name, NULL);
1188 }
1189 #endif
1190 }
1191 module_exit(rndis_exit);
1192
1193 MODULE_LICENSE("GPL");
Linux with added FPC-III support