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