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net/xfrm/xfrm_output.c: move EXPORT_SYMBOL
[deliverable/linux.git] / drivers / usb / gadget / rndis.c
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/list.h>
29 #include <linux/proc_fs.h>
30 #include <linux/slab.h>
31 #include <linux/seq_file.h>
32 #include <linux/netdevice.h>
33
34 #include <asm/io.h>
35 #include <asm/byteorder.h>
36 #include <asm/unaligned.h>
37
38
39 #undef VERBOSE_DEBUG
40
41 #include "rndis.h"
42
43
44 /* The driver for your USB chip needs to support ep0 OUT to work with
45 * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
46 *
47 * Windows hosts need an INF file like Documentation/usb/linux.inf
48 * and will be happier if you provide the host_addr module parameter.
49 */
50
51 #if 0
52 static int rndis_debug = 0;
53 module_param (rndis_debug, int, 0);
54 MODULE_PARM_DESC (rndis_debug, "enable debugging");
55 #else
56 #define rndis_debug 0
57 #endif
58
59 #define RNDIS_MAX_CONFIGS 1
60
61
62 static rndis_params rndis_per_dev_params[RNDIS_MAX_CONFIGS];
63
64 /* Driver Version */
65 static const __le32 rndis_driver_version = cpu_to_le32(1);
66
67 /* Function Prototypes */
68 static rndis_resp_t *rndis_add_response(int configNr, u32 length);
69
70
71 /* supported OIDs */
72 static const u32 oid_supported_list[] =
73 {
74 /* the general stuff */
75 RNDIS_OID_GEN_SUPPORTED_LIST,
76 RNDIS_OID_GEN_HARDWARE_STATUS,
77 RNDIS_OID_GEN_MEDIA_SUPPORTED,
78 RNDIS_OID_GEN_MEDIA_IN_USE,
79 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
80 RNDIS_OID_GEN_LINK_SPEED,
81 RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE,
82 RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE,
83 RNDIS_OID_GEN_VENDOR_ID,
84 RNDIS_OID_GEN_VENDOR_DESCRIPTION,
85 RNDIS_OID_GEN_VENDOR_DRIVER_VERSION,
86 RNDIS_OID_GEN_CURRENT_PACKET_FILTER,
87 RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE,
88 RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
89 RNDIS_OID_GEN_PHYSICAL_MEDIUM,
90
91 /* the statistical stuff */
92 RNDIS_OID_GEN_XMIT_OK,
93 RNDIS_OID_GEN_RCV_OK,
94 RNDIS_OID_GEN_XMIT_ERROR,
95 RNDIS_OID_GEN_RCV_ERROR,
96 RNDIS_OID_GEN_RCV_NO_BUFFER,
97 #ifdef RNDIS_OPTIONAL_STATS
98 RNDIS_OID_GEN_DIRECTED_BYTES_XMIT,
99 RNDIS_OID_GEN_DIRECTED_FRAMES_XMIT,
100 RNDIS_OID_GEN_MULTICAST_BYTES_XMIT,
101 RNDIS_OID_GEN_MULTICAST_FRAMES_XMIT,
102 RNDIS_OID_GEN_BROADCAST_BYTES_XMIT,
103 RNDIS_OID_GEN_BROADCAST_FRAMES_XMIT,
104 RNDIS_OID_GEN_DIRECTED_BYTES_RCV,
105 RNDIS_OID_GEN_DIRECTED_FRAMES_RCV,
106 RNDIS_OID_GEN_MULTICAST_BYTES_RCV,
107 RNDIS_OID_GEN_MULTICAST_FRAMES_RCV,
108 RNDIS_OID_GEN_BROADCAST_BYTES_RCV,
109 RNDIS_OID_GEN_BROADCAST_FRAMES_RCV,
110 RNDIS_OID_GEN_RCV_CRC_ERROR,
111 RNDIS_OID_GEN_TRANSMIT_QUEUE_LENGTH,
112 #endif /* RNDIS_OPTIONAL_STATS */
113
114 /* mandatory 802.3 */
115 /* the general stuff */
116 RNDIS_OID_802_3_PERMANENT_ADDRESS,
117 RNDIS_OID_802_3_CURRENT_ADDRESS,
118 RNDIS_OID_802_3_MULTICAST_LIST,
119 RNDIS_OID_802_3_MAC_OPTIONS,
120 RNDIS_OID_802_3_MAXIMUM_LIST_SIZE,
121
122 /* the statistical stuff */
123 RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT,
124 RNDIS_OID_802_3_XMIT_ONE_COLLISION,
125 RNDIS_OID_802_3_XMIT_MORE_COLLISIONS,
126 #ifdef RNDIS_OPTIONAL_STATS
127 RNDIS_OID_802_3_XMIT_DEFERRED,
128 RNDIS_OID_802_3_XMIT_MAX_COLLISIONS,
129 RNDIS_OID_802_3_RCV_OVERRUN,
130 RNDIS_OID_802_3_XMIT_UNDERRUN,
131 RNDIS_OID_802_3_XMIT_HEARTBEAT_FAILURE,
132 RNDIS_OID_802_3_XMIT_TIMES_CRS_LOST,
133 RNDIS_OID_802_3_XMIT_LATE_COLLISIONS,
134 #endif /* RNDIS_OPTIONAL_STATS */
135
136 #ifdef RNDIS_PM
137 /* PM and wakeup are "mandatory" for USB, but the RNDIS specs
138 * don't say what they mean ... and the NDIS specs are often
139 * confusing and/or ambiguous in this context. (That is, more
140 * so than their specs for the other OIDs.)
141 *
142 * FIXME someone who knows what these should do, please
143 * implement them!
144 */
145
146 /* power management */
147 OID_PNP_CAPABILITIES,
148 OID_PNP_QUERY_POWER,
149 OID_PNP_SET_POWER,
150
151 #ifdef RNDIS_WAKEUP
152 /* wake up host */
153 OID_PNP_ENABLE_WAKE_UP,
154 OID_PNP_ADD_WAKE_UP_PATTERN,
155 OID_PNP_REMOVE_WAKE_UP_PATTERN,
156 #endif /* RNDIS_WAKEUP */
157 #endif /* RNDIS_PM */
158 };
159
160
161 /* NDIS Functions */
162 static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
163 unsigned buf_len, rndis_resp_t *r)
164 {
165 int retval = -ENOTSUPP;
166 u32 length = 4; /* usually */
167 __le32 *outbuf;
168 int i, count;
169 rndis_query_cmplt_type *resp;
170 struct net_device *net;
171 struct rtnl_link_stats64 temp;
172 const struct rtnl_link_stats64 *stats;
173
174 if (!r) return -ENOMEM;
175 resp = (rndis_query_cmplt_type *)r->buf;
176
177 if (!resp) return -ENOMEM;
178
179 if (buf_len && rndis_debug > 1) {
180 pr_debug("query OID %08x value, len %d:\n", OID, buf_len);
181 for (i = 0; i < buf_len; i += 16) {
182 pr_debug("%03d: %08x %08x %08x %08x\n", i,
183 get_unaligned_le32(&buf[i]),
184 get_unaligned_le32(&buf[i + 4]),
185 get_unaligned_le32(&buf[i + 8]),
186 get_unaligned_le32(&buf[i + 12]));
187 }
188 }
189
190 /* response goes here, right after the header */
191 outbuf = (__le32 *)&resp[1];
192 resp->InformationBufferOffset = cpu_to_le32(16);
193
194 net = rndis_per_dev_params[configNr].dev;
195 stats = dev_get_stats(net, &temp);
196
197 switch (OID) {
198
199 /* general oids (table 4-1) */
200
201 /* mandatory */
202 case RNDIS_OID_GEN_SUPPORTED_LIST:
203 pr_debug("%s: RNDIS_OID_GEN_SUPPORTED_LIST\n", __func__);
204 length = sizeof(oid_supported_list);
205 count = length / sizeof(u32);
206 for (i = 0; i < count; i++)
207 outbuf[i] = cpu_to_le32(oid_supported_list[i]);
208 retval = 0;
209 break;
210
211 /* mandatory */
212 case RNDIS_OID_GEN_HARDWARE_STATUS:
213 pr_debug("%s: RNDIS_OID_GEN_HARDWARE_STATUS\n", __func__);
214 /* Bogus question!
215 * Hardware must be ready to receive high level protocols.
216 * BTW:
217 * reddite ergo quae sunt Caesaris Caesari
218 * et quae sunt Dei Deo!
219 */
220 *outbuf = cpu_to_le32(0);
221 retval = 0;
222 break;
223
224 /* mandatory */
225 case RNDIS_OID_GEN_MEDIA_SUPPORTED:
226 pr_debug("%s: RNDIS_OID_GEN_MEDIA_SUPPORTED\n", __func__);
227 *outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
228 retval = 0;
229 break;
230
231 /* mandatory */
232 case RNDIS_OID_GEN_MEDIA_IN_USE:
233 pr_debug("%s: RNDIS_OID_GEN_MEDIA_IN_USE\n", __func__);
234 /* one medium, one transport... (maybe you do it better) */
235 *outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
236 retval = 0;
237 break;
238
239 /* mandatory */
240 case RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE:
241 pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
242 if (rndis_per_dev_params[configNr].dev) {
243 *outbuf = cpu_to_le32(
244 rndis_per_dev_params[configNr].dev->mtu);
245 retval = 0;
246 }
247 break;
248
249 /* mandatory */
250 case RNDIS_OID_GEN_LINK_SPEED:
251 if (rndis_debug > 1)
252 pr_debug("%s: RNDIS_OID_GEN_LINK_SPEED\n", __func__);
253 if (rndis_per_dev_params[configNr].media_state
254 == RNDIS_MEDIA_STATE_DISCONNECTED)
255 *outbuf = cpu_to_le32(0);
256 else
257 *outbuf = cpu_to_le32(
258 rndis_per_dev_params[configNr].speed);
259 retval = 0;
260 break;
261
262 /* mandatory */
263 case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE:
264 pr_debug("%s: RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
265 if (rndis_per_dev_params[configNr].dev) {
266 *outbuf = cpu_to_le32(
267 rndis_per_dev_params[configNr].dev->mtu);
268 retval = 0;
269 }
270 break;
271
272 /* mandatory */
273 case RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE:
274 pr_debug("%s: RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
275 if (rndis_per_dev_params[configNr].dev) {
276 *outbuf = cpu_to_le32(
277 rndis_per_dev_params[configNr].dev->mtu);
278 retval = 0;
279 }
280 break;
281
282 /* mandatory */
283 case RNDIS_OID_GEN_VENDOR_ID:
284 pr_debug("%s: RNDIS_OID_GEN_VENDOR_ID\n", __func__);
285 *outbuf = cpu_to_le32(
286 rndis_per_dev_params[configNr].vendorID);
287 retval = 0;
288 break;
289
290 /* mandatory */
291 case RNDIS_OID_GEN_VENDOR_DESCRIPTION:
292 pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__);
293 if (rndis_per_dev_params[configNr].vendorDescr) {
294 length = strlen(rndis_per_dev_params[configNr].
295 vendorDescr);
296 memcpy(outbuf,
297 rndis_per_dev_params[configNr].vendorDescr,
298 length);
299 } else {
300 outbuf[0] = 0;
301 }
302 retval = 0;
303 break;
304
305 case RNDIS_OID_GEN_VENDOR_DRIVER_VERSION:
306 pr_debug("%s: RNDIS_OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
307 /* Created as LE */
308 *outbuf = rndis_driver_version;
309 retval = 0;
310 break;
311
312 /* mandatory */
313 case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
314 pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
315 *outbuf = cpu_to_le32(*rndis_per_dev_params[configNr].filter);
316 retval = 0;
317 break;
318
319 /* mandatory */
320 case RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE:
321 pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
322 *outbuf = cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
323 retval = 0;
324 break;
325
326 /* mandatory */
327 case RNDIS_OID_GEN_MEDIA_CONNECT_STATUS:
328 if (rndis_debug > 1)
329 pr_debug("%s: RNDIS_OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
330 *outbuf = cpu_to_le32(rndis_per_dev_params[configNr]
331 .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 /* The RNDIS specification is incomplete/wrong. Some versions
342 * of MS-Windows expect OIDs that aren't specified there. Other
343 * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
344 */
345 case RNDIS_OID_GEN_MAC_OPTIONS: /* from WinME */
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 /* statistics OIDs (table 4-2) */
354
355 /* mandatory */
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 /* mandatory */
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 /* mandatory */
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 /* mandatory */
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 /* mandatory */
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 /* ieee802.3 OIDs (table 4-3) */
407
408 /* mandatory */
409 case RNDIS_OID_802_3_PERMANENT_ADDRESS:
410 pr_debug("%s: RNDIS_OID_802_3_PERMANENT_ADDRESS\n", __func__);
411 if (rndis_per_dev_params[configNr].dev) {
412 length = ETH_ALEN;
413 memcpy(outbuf,
414 rndis_per_dev_params[configNr].host_mac,
415 length);
416 retval = 0;
417 }
418 break;
419
420 /* mandatory */
421 case RNDIS_OID_802_3_CURRENT_ADDRESS:
422 pr_debug("%s: RNDIS_OID_802_3_CURRENT_ADDRESS\n", __func__);
423 if (rndis_per_dev_params[configNr].dev) {
424 length = ETH_ALEN;
425 memcpy(outbuf,
426 rndis_per_dev_params [configNr].host_mac,
427 length);
428 retval = 0;
429 }
430 break;
431
432 /* mandatory */
433 case RNDIS_OID_802_3_MULTICAST_LIST:
434 pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
435 /* Multicast base address only */
436 *outbuf = cpu_to_le32(0xE0000000);
437 retval = 0;
438 break;
439
440 /* mandatory */
441 case RNDIS_OID_802_3_MAXIMUM_LIST_SIZE:
442 pr_debug("%s: RNDIS_OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
443 /* Multicast base address only */
444 *outbuf = cpu_to_le32(1);
445 retval = 0;
446 break;
447
448 case RNDIS_OID_802_3_MAC_OPTIONS:
449 pr_debug("%s: RNDIS_OID_802_3_MAC_OPTIONS\n", __func__);
450 *outbuf = cpu_to_le32(0);
451 retval = 0;
452 break;
453
454 /* ieee802.3 statistics OIDs (table 4-4) */
455
456 /* mandatory */
457 case RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT:
458 pr_debug("%s: RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
459 if (stats) {
460 *outbuf = cpu_to_le32(stats->rx_frame_errors);
461 retval = 0;
462 }
463 break;
464
465 /* mandatory */
466 case RNDIS_OID_802_3_XMIT_ONE_COLLISION:
467 pr_debug("%s: RNDIS_OID_802_3_XMIT_ONE_COLLISION\n", __func__);
468 *outbuf = cpu_to_le32(0);
469 retval = 0;
470 break;
471
472 /* mandatory */
473 case RNDIS_OID_802_3_XMIT_MORE_COLLISIONS:
474 pr_debug("%s: RNDIS_OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
475 *outbuf = cpu_to_le32(0);
476 retval = 0;
477 break;
478
479 default:
480 pr_warning("%s: query unknown OID 0x%08X\n",
481 __func__, OID);
482 }
483 if (retval < 0)
484 length = 0;
485
486 resp->InformationBufferLength = cpu_to_le32(length);
487 r->length = length + sizeof(*resp);
488 resp->MessageLength = cpu_to_le32(r->length);
489 return retval;
490 }
491
492 static int gen_ndis_set_resp(u8 configNr, u32 OID, u8 *buf, u32 buf_len,
493 rndis_resp_t *r)
494 {
495 rndis_set_cmplt_type *resp;
496 int i, retval = -ENOTSUPP;
497 struct rndis_params *params;
498
499 if (!r)
500 return -ENOMEM;
501 resp = (rndis_set_cmplt_type *)r->buf;
502 if (!resp)
503 return -ENOMEM;
504
505 if (buf_len && rndis_debug > 1) {
506 pr_debug("set OID %08x value, len %d:\n", OID, buf_len);
507 for (i = 0; i < buf_len; i += 16) {
508 pr_debug("%03d: %08x %08x %08x %08x\n", i,
509 get_unaligned_le32(&buf[i]),
510 get_unaligned_le32(&buf[i + 4]),
511 get_unaligned_le32(&buf[i + 8]),
512 get_unaligned_le32(&buf[i + 12]));
513 }
514 }
515
516 params = &rndis_per_dev_params[configNr];
517 switch (OID) {
518 case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
519
520 /* these NDIS_PACKET_TYPE_* bitflags are shared with
521 * cdc_filter; it's not RNDIS-specific
522 * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
523 * PROMISCUOUS, DIRECTED,
524 * MULTICAST, ALL_MULTICAST, BROADCAST
525 */
526 *params->filter = (u16)get_unaligned_le32(buf);
527 pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER %08x\n",
528 __func__, *params->filter);
529
530 /* this call has a significant side effect: it's
531 * what makes the packet flow start and stop, like
532 * activating the CDC Ethernet altsetting.
533 */
534 retval = 0;
535 if (*params->filter) {
536 params->state = RNDIS_DATA_INITIALIZED;
537 netif_carrier_on(params->dev);
538 if (netif_running(params->dev))
539 netif_wake_queue(params->dev);
540 } else {
541 params->state = RNDIS_INITIALIZED;
542 netif_carrier_off(params->dev);
543 netif_stop_queue(params->dev);
544 }
545 break;
546
547 case RNDIS_OID_802_3_MULTICAST_LIST:
548 /* I think we can ignore this */
549 pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
550 retval = 0;
551 break;
552
553 default:
554 pr_warning("%s: set unknown OID 0x%08X, size %d\n",
555 __func__, OID, buf_len);
556 }
557
558 return retval;
559 }
560
561 /*
562 * Response Functions
563 */
564
565 static int rndis_init_response(int configNr, rndis_init_msg_type *buf)
566 {
567 rndis_init_cmplt_type *resp;
568 rndis_resp_t *r;
569 struct rndis_params *params = rndis_per_dev_params + configNr;
570
571 if (!params->dev)
572 return -ENOTSUPP;
573
574 r = rndis_add_response(configNr, sizeof(rndis_init_cmplt_type));
575 if (!r)
576 return -ENOMEM;
577 resp = (rndis_init_cmplt_type *)r->buf;
578
579 resp->MessageType = cpu_to_le32(RNDIS_MSG_INIT_C);
580 resp->MessageLength = cpu_to_le32(52);
581 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
582 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
583 resp->MajorVersion = cpu_to_le32(RNDIS_MAJOR_VERSION);
584 resp->MinorVersion = cpu_to_le32(RNDIS_MINOR_VERSION);
585 resp->DeviceFlags = cpu_to_le32(RNDIS_DF_CONNECTIONLESS);
586 resp->Medium = cpu_to_le32(RNDIS_MEDIUM_802_3);
587 resp->MaxPacketsPerTransfer = cpu_to_le32(1);
588 resp->MaxTransferSize = cpu_to_le32(
589 params->dev->mtu
590 + sizeof(struct ethhdr)
591 + sizeof(struct rndis_packet_msg_type)
592 + 22);
593 resp->PacketAlignmentFactor = cpu_to_le32(0);
594 resp->AFListOffset = cpu_to_le32(0);
595 resp->AFListSize = cpu_to_le32(0);
596
597 params->resp_avail(params->v);
598 return 0;
599 }
600
601 static int rndis_query_response(int configNr, rndis_query_msg_type *buf)
602 {
603 rndis_query_cmplt_type *resp;
604 rndis_resp_t *r;
605 struct rndis_params *params = rndis_per_dev_params + configNr;
606
607 /* pr_debug("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID)); */
608 if (!params->dev)
609 return -ENOTSUPP;
610
611 /*
612 * we need more memory:
613 * gen_ndis_query_resp expects enough space for
614 * rndis_query_cmplt_type followed by data.
615 * oid_supported_list is the largest data reply
616 */
617 r = rndis_add_response(configNr,
618 sizeof(oid_supported_list) + sizeof(rndis_query_cmplt_type));
619 if (!r)
620 return -ENOMEM;
621 resp = (rndis_query_cmplt_type *)r->buf;
622
623 resp->MessageType = cpu_to_le32(RNDIS_MSG_QUERY_C);
624 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
625
626 if (gen_ndis_query_resp(configNr, le32_to_cpu(buf->OID),
627 le32_to_cpu(buf->InformationBufferOffset)
628 + 8 + (u8 *)buf,
629 le32_to_cpu(buf->InformationBufferLength),
630 r)) {
631 /* OID not supported */
632 resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
633 resp->MessageLength = cpu_to_le32(sizeof *resp);
634 resp->InformationBufferLength = cpu_to_le32(0);
635 resp->InformationBufferOffset = cpu_to_le32(0);
636 } else
637 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
638
639 params->resp_avail(params->v);
640 return 0;
641 }
642
643 static int rndis_set_response(int configNr, rndis_set_msg_type *buf)
644 {
645 u32 BufLength, BufOffset;
646 rndis_set_cmplt_type *resp;
647 rndis_resp_t *r;
648 struct rndis_params *params = rndis_per_dev_params + configNr;
649
650 r = rndis_add_response(configNr, sizeof(rndis_set_cmplt_type));
651 if (!r)
652 return -ENOMEM;
653 resp = (rndis_set_cmplt_type *)r->buf;
654
655 BufLength = le32_to_cpu(buf->InformationBufferLength);
656 BufOffset = le32_to_cpu(buf->InformationBufferOffset);
657
658 #ifdef VERBOSE_DEBUG
659 pr_debug("%s: Length: %d\n", __func__, BufLength);
660 pr_debug("%s: Offset: %d\n", __func__, BufOffset);
661 pr_debug("%s: InfoBuffer: ", __func__);
662
663 for (i = 0; i < BufLength; i++) {
664 pr_debug("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
665 }
666
667 pr_debug("\n");
668 #endif
669
670 resp->MessageType = cpu_to_le32(RNDIS_MSG_SET_C);
671 resp->MessageLength = cpu_to_le32(16);
672 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
673 if (gen_ndis_set_resp(configNr, le32_to_cpu(buf->OID),
674 ((u8 *)buf) + 8 + BufOffset, BufLength, r))
675 resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
676 else
677 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
678
679 params->resp_avail(params->v);
680 return 0;
681 }
682
683 static int rndis_reset_response(int configNr, rndis_reset_msg_type *buf)
684 {
685 rndis_reset_cmplt_type *resp;
686 rndis_resp_t *r;
687 struct rndis_params *params = rndis_per_dev_params + configNr;
688
689 r = rndis_add_response(configNr, sizeof(rndis_reset_cmplt_type));
690 if (!r)
691 return -ENOMEM;
692 resp = (rndis_reset_cmplt_type *)r->buf;
693
694 resp->MessageType = cpu_to_le32(RNDIS_MSG_RESET_C);
695 resp->MessageLength = cpu_to_le32(16);
696 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
697 /* resent information */
698 resp->AddressingReset = cpu_to_le32(1);
699
700 params->resp_avail(params->v);
701 return 0;
702 }
703
704 static int rndis_keepalive_response(int configNr,
705 rndis_keepalive_msg_type *buf)
706 {
707 rndis_keepalive_cmplt_type *resp;
708 rndis_resp_t *r;
709 struct rndis_params *params = rndis_per_dev_params + configNr;
710
711 /* host "should" check only in RNDIS_DATA_INITIALIZED state */
712
713 r = rndis_add_response(configNr, sizeof(rndis_keepalive_cmplt_type));
714 if (!r)
715 return -ENOMEM;
716 resp = (rndis_keepalive_cmplt_type *)r->buf;
717
718 resp->MessageType = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
719 resp->MessageLength = cpu_to_le32(16);
720 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
721 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
722
723 params->resp_avail(params->v);
724 return 0;
725 }
726
727
728 /*
729 * Device to Host Comunication
730 */
731 static int rndis_indicate_status_msg(int configNr, u32 status)
732 {
733 rndis_indicate_status_msg_type *resp;
734 rndis_resp_t *r;
735 struct rndis_params *params = rndis_per_dev_params + configNr;
736
737 if (params->state == RNDIS_UNINITIALIZED)
738 return -ENOTSUPP;
739
740 r = rndis_add_response(configNr,
741 sizeof(rndis_indicate_status_msg_type));
742 if (!r)
743 return -ENOMEM;
744 resp = (rndis_indicate_status_msg_type *)r->buf;
745
746 resp->MessageType = cpu_to_le32(RNDIS_MSG_INDICATE);
747 resp->MessageLength = cpu_to_le32(20);
748 resp->Status = cpu_to_le32(status);
749 resp->StatusBufferLength = cpu_to_le32(0);
750 resp->StatusBufferOffset = cpu_to_le32(0);
751
752 params->resp_avail(params->v);
753 return 0;
754 }
755
756 int rndis_signal_connect(int configNr)
757 {
758 rndis_per_dev_params[configNr].media_state
759 = RNDIS_MEDIA_STATE_CONNECTED;
760 return rndis_indicate_status_msg(configNr,
761 RNDIS_STATUS_MEDIA_CONNECT);
762 }
763 EXPORT_SYMBOL(rndis_signal_connect);
764
765 int rndis_signal_disconnect(int configNr)
766 {
767 rndis_per_dev_params[configNr].media_state
768 = RNDIS_MEDIA_STATE_DISCONNECTED;
769 return rndis_indicate_status_msg(configNr,
770 RNDIS_STATUS_MEDIA_DISCONNECT);
771 }
772 EXPORT_SYMBOL(rndis_signal_disconnect);
773
774 void rndis_uninit(int configNr)
775 {
776 u8 *buf;
777 u32 length;
778
779 if (configNr >= RNDIS_MAX_CONFIGS)
780 return;
781 rndis_per_dev_params[configNr].state = RNDIS_UNINITIALIZED;
782
783 /* drain the response queue */
784 while ((buf = rndis_get_next_response(configNr, &length)))
785 rndis_free_response(configNr, buf);
786 }
787 EXPORT_SYMBOL(rndis_uninit);
788
789 void rndis_set_host_mac(int configNr, const u8 *addr)
790 {
791 rndis_per_dev_params[configNr].host_mac = addr;
792 }
793 EXPORT_SYMBOL(rndis_set_host_mac);
794
795 /*
796 * Message Parser
797 */
798 int rndis_msg_parser(u8 configNr, u8 *buf)
799 {
800 u32 MsgType, MsgLength;
801 __le32 *tmp;
802 struct rndis_params *params;
803
804 if (!buf)
805 return -ENOMEM;
806
807 tmp = (__le32 *)buf;
808 MsgType = get_unaligned_le32(tmp++);
809 MsgLength = get_unaligned_le32(tmp++);
810
811 if (configNr >= RNDIS_MAX_CONFIGS)
812 return -ENOTSUPP;
813 params = &rndis_per_dev_params[configNr];
814
815 /* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
816 * rx/tx statistics and link status, in addition to KEEPALIVE traffic
817 * and normal HC level polling to see if there's any IN traffic.
818 */
819
820 /* For USB: responses may take up to 10 seconds */
821 switch (MsgType) {
822 case RNDIS_MSG_INIT:
823 pr_debug("%s: RNDIS_MSG_INIT\n",
824 __func__);
825 params->state = RNDIS_INITIALIZED;
826 return rndis_init_response(configNr,
827 (rndis_init_msg_type *)buf);
828
829 case RNDIS_MSG_HALT:
830 pr_debug("%s: RNDIS_MSG_HALT\n",
831 __func__);
832 params->state = RNDIS_UNINITIALIZED;
833 if (params->dev) {
834 netif_carrier_off(params->dev);
835 netif_stop_queue(params->dev);
836 }
837 return 0;
838
839 case RNDIS_MSG_QUERY:
840 return rndis_query_response(configNr,
841 (rndis_query_msg_type *)buf);
842
843 case RNDIS_MSG_SET:
844 return rndis_set_response(configNr,
845 (rndis_set_msg_type *)buf);
846
847 case RNDIS_MSG_RESET:
848 pr_debug("%s: RNDIS_MSG_RESET\n",
849 __func__);
850 return rndis_reset_response(configNr,
851 (rndis_reset_msg_type *)buf);
852
853 case RNDIS_MSG_KEEPALIVE:
854 /* For USB: host does this every 5 seconds */
855 if (rndis_debug > 1)
856 pr_debug("%s: RNDIS_MSG_KEEPALIVE\n",
857 __func__);
858 return rndis_keepalive_response(configNr,
859 (rndis_keepalive_msg_type *)
860 buf);
861
862 default:
863 /* At least Windows XP emits some undefined RNDIS messages.
864 * In one case those messages seemed to relate to the host
865 * suspending itself.
866 */
867 pr_warning("%s: unknown RNDIS message 0x%08X len %d\n",
868 __func__, MsgType, MsgLength);
869 print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET,
870 buf, MsgLength);
871 break;
872 }
873
874 return -ENOTSUPP;
875 }
876 EXPORT_SYMBOL(rndis_msg_parser);
877
878 int rndis_register(void (*resp_avail)(void *v), void *v)
879 {
880 u8 i;
881
882 if (!resp_avail)
883 return -EINVAL;
884
885 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
886 if (!rndis_per_dev_params[i].used) {
887 rndis_per_dev_params[i].used = 1;
888 rndis_per_dev_params[i].resp_avail = resp_avail;
889 rndis_per_dev_params[i].v = v;
890 pr_debug("%s: configNr = %d\n", __func__, i);
891 return i;
892 }
893 }
894 pr_debug("failed\n");
895
896 return -ENODEV;
897 }
898 EXPORT_SYMBOL(rndis_register);
899
900 void rndis_deregister(int configNr)
901 {
902 pr_debug("%s:\n", __func__);
903
904 if (configNr >= RNDIS_MAX_CONFIGS) return;
905 rndis_per_dev_params[configNr].used = 0;
906 }
907 EXPORT_SYMBOL(rndis_deregister);
908
909 int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
910 {
911 pr_debug("%s:\n", __func__);
912 if (!dev)
913 return -EINVAL;
914 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
915
916 rndis_per_dev_params[configNr].dev = dev;
917 rndis_per_dev_params[configNr].filter = cdc_filter;
918
919 return 0;
920 }
921 EXPORT_SYMBOL(rndis_set_param_dev);
922
923 int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr)
924 {
925 pr_debug("%s:\n", __func__);
926 if (!vendorDescr) return -1;
927 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
928
929 rndis_per_dev_params[configNr].vendorID = vendorID;
930 rndis_per_dev_params[configNr].vendorDescr = vendorDescr;
931
932 return 0;
933 }
934 EXPORT_SYMBOL(rndis_set_param_vendor);
935
936 int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed)
937 {
938 pr_debug("%s: %u %u\n", __func__, medium, speed);
939 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
940
941 rndis_per_dev_params[configNr].medium = medium;
942 rndis_per_dev_params[configNr].speed = speed;
943
944 return 0;
945 }
946 EXPORT_SYMBOL(rndis_set_param_medium);
947
948 void rndis_add_hdr(struct sk_buff *skb)
949 {
950 struct rndis_packet_msg_type *header;
951
952 if (!skb)
953 return;
954 header = (void *)skb_push(skb, sizeof(*header));
955 memset(header, 0, sizeof *header);
956 header->MessageType = cpu_to_le32(RNDIS_MSG_PACKET);
957 header->MessageLength = cpu_to_le32(skb->len);
958 header->DataOffset = cpu_to_le32(36);
959 header->DataLength = cpu_to_le32(skb->len - sizeof(*header));
960 }
961 EXPORT_SYMBOL(rndis_add_hdr);
962
963 void rndis_free_response(int configNr, u8 *buf)
964 {
965 rndis_resp_t *r;
966 struct list_head *act, *tmp;
967
968 list_for_each_safe(act, tmp,
969 &(rndis_per_dev_params[configNr].resp_queue))
970 {
971 r = list_entry(act, rndis_resp_t, list);
972 if (r && r->buf == buf) {
973 list_del(&r->list);
974 kfree(r);
975 }
976 }
977 }
978 EXPORT_SYMBOL(rndis_free_response);
979
980 u8 *rndis_get_next_response(int configNr, u32 *length)
981 {
982 rndis_resp_t *r;
983 struct list_head *act, *tmp;
984
985 if (!length) return NULL;
986
987 list_for_each_safe(act, tmp,
988 &(rndis_per_dev_params[configNr].resp_queue))
989 {
990 r = list_entry(act, rndis_resp_t, list);
991 if (!r->send) {
992 r->send = 1;
993 *length = r->length;
994 return r->buf;
995 }
996 }
997
998 return NULL;
999 }
1000 EXPORT_SYMBOL(rndis_get_next_response);
1001
1002 static rndis_resp_t *rndis_add_response(int configNr, u32 length)
1003 {
1004 rndis_resp_t *r;
1005
1006 /* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */
1007 r = kmalloc(sizeof(rndis_resp_t) + length, GFP_ATOMIC);
1008 if (!r) return NULL;
1009
1010 r->buf = (u8 *)(r + 1);
1011 r->length = length;
1012 r->send = 0;
1013
1014 list_add_tail(&r->list,
1015 &(rndis_per_dev_params[configNr].resp_queue));
1016 return r;
1017 }
1018
1019 int rndis_rm_hdr(struct gether *port,
1020 struct sk_buff *skb,
1021 struct sk_buff_head *list)
1022 {
1023 /* tmp points to a struct rndis_packet_msg_type */
1024 __le32 *tmp = (void *)skb->data;
1025
1026 /* MessageType, MessageLength */
1027 if (cpu_to_le32(RNDIS_MSG_PACKET)
1028 != get_unaligned(tmp++)) {
1029 dev_kfree_skb_any(skb);
1030 return -EINVAL;
1031 }
1032 tmp++;
1033
1034 /* DataOffset, DataLength */
1035 if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8)) {
1036 dev_kfree_skb_any(skb);
1037 return -EOVERFLOW;
1038 }
1039 skb_trim(skb, get_unaligned_le32(tmp++));
1040
1041 skb_queue_tail(list, skb);
1042 return 0;
1043 }
1044 EXPORT_SYMBOL(rndis_rm_hdr);
1045
1046 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1047
1048 static int rndis_proc_show(struct seq_file *m, void *v)
1049 {
1050 rndis_params *param = m->private;
1051
1052 seq_printf(m,
1053 "Config Nr. %d\n"
1054 "used : %s\n"
1055 "state : %s\n"
1056 "medium : 0x%08X\n"
1057 "speed : %d\n"
1058 "cable : %s\n"
1059 "vendor ID : 0x%08X\n"
1060 "vendor : %s\n",
1061 param->confignr, (param->used) ? "y" : "n",
1062 ({ char *s = "?";
1063 switch (param->state) {
1064 case RNDIS_UNINITIALIZED:
1065 s = "RNDIS_UNINITIALIZED"; break;
1066 case RNDIS_INITIALIZED:
1067 s = "RNDIS_INITIALIZED"; break;
1068 case RNDIS_DATA_INITIALIZED:
1069 s = "RNDIS_DATA_INITIALIZED"; break;
1070 } s; }),
1071 param->medium,
1072 (param->media_state) ? 0 : param->speed*100,
1073 (param->media_state) ? "disconnected" : "connected",
1074 param->vendorID, param->vendorDescr);
1075 return 0;
1076 }
1077
1078 static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
1079 size_t count, loff_t *ppos)
1080 {
1081 rndis_params *p = PDE_DATA(file_inode(file));
1082 u32 speed = 0;
1083 int i, fl_speed = 0;
1084
1085 for (i = 0; i < count; i++) {
1086 char c;
1087 if (get_user(c, buffer))
1088 return -EFAULT;
1089 switch (c) {
1090 case '0':
1091 case '1':
1092 case '2':
1093 case '3':
1094 case '4':
1095 case '5':
1096 case '6':
1097 case '7':
1098 case '8':
1099 case '9':
1100 fl_speed = 1;
1101 speed = speed * 10 + c - '0';
1102 break;
1103 case 'C':
1104 case 'c':
1105 rndis_signal_connect(p->confignr);
1106 break;
1107 case 'D':
1108 case 'd':
1109 rndis_signal_disconnect(p->confignr);
1110 break;
1111 default:
1112 if (fl_speed) p->speed = speed;
1113 else pr_debug("%c is not valid\n", c);
1114 break;
1115 }
1116
1117 buffer++;
1118 }
1119
1120 return count;
1121 }
1122
1123 static int rndis_proc_open(struct inode *inode, struct file *file)
1124 {
1125 return single_open(file, rndis_proc_show, PDE_DATA(inode));
1126 }
1127
1128 static const struct file_operations rndis_proc_fops = {
1129 .owner = THIS_MODULE,
1130 .open = rndis_proc_open,
1131 .read = seq_read,
1132 .llseek = seq_lseek,
1133 .release = single_release,
1134 .write = rndis_proc_write,
1135 };
1136
1137 #define NAME_TEMPLATE "driver/rndis-%03d"
1138
1139 static struct proc_dir_entry *rndis_connect_state [RNDIS_MAX_CONFIGS];
1140
1141 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
1142
1143
1144 int rndis_init(void)
1145 {
1146 u8 i;
1147
1148 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
1149 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1150 char name [20];
1151
1152 sprintf(name, NAME_TEMPLATE, i);
1153 rndis_connect_state[i] = proc_create_data(name, 0660, NULL,
1154 &rndis_proc_fops,
1155 (void *)(rndis_per_dev_params + i));
1156 if (!rndis_connect_state[i]) {
1157 pr_debug("%s: remove entries", __func__);
1158 while (i) {
1159 sprintf(name, NAME_TEMPLATE, --i);
1160 remove_proc_entry(name, NULL);
1161 }
1162 pr_debug("\n");
1163 return -EIO;
1164 }
1165 #endif
1166 rndis_per_dev_params[i].confignr = i;
1167 rndis_per_dev_params[i].used = 0;
1168 rndis_per_dev_params[i].state = RNDIS_UNINITIALIZED;
1169 rndis_per_dev_params[i].media_state
1170 = RNDIS_MEDIA_STATE_DISCONNECTED;
1171 INIT_LIST_HEAD(&(rndis_per_dev_params[i].resp_queue));
1172 }
1173
1174 return 0;
1175 }
1176
1177 void rndis_exit(void)
1178 {
1179 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1180 u8 i;
1181 char name[20];
1182
1183 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
1184 sprintf(name, NAME_TEMPLATE, i);
1185 remove_proc_entry(name, NULL);
1186 }
1187 #endif
1188 }
1189
Linux kernel - Deliverables
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