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/init.h>
  29 #include <linux/list.h>
  30 #include <linux/proc_fs.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/system.h>
  37 #include <asm/unaligned.h>
  38
  39
  40 #undef  VERBOSE_DEBUG
  41
  42 #include "rndis.h"
  43
  44
  45 /* The driver for your USB chip needs to support ep0 OUT to work with
  46  * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
  47  *
  48  * Windows hosts need an INF file like Documentation/usb/linux.inf
  49  * and will be happier if you provide the host_addr module parameter.
  50  */
  51
  52 #if 0
  53 static int rndis_debug = 0;
  54 module_param (rndis_debug, int, 0);
  55 MODULE_PARM_DESC (rndis_debug, "enable debugging");
  56 #else
  57 #define rndis_debug             0
  58 #endif
  59
  60 #define RNDIS_MAX_CONFIGS       1
  61
  62
  63 static rndis_params rndis_per_dev_params [RNDIS_MAX_CONFIGS];
  64
  65 /* Driver Version */
  66 static const __le32 rndis_driver_version = cpu_to_le32 (1);
  67
  68 /* Function Prototypes */
  69 static rndis_resp_t *rndis_add_response (int configNr, u32 length);
  70
  71
  72 /* supported OIDs */
  73 static const u32 oid_supported_list [] =
  74 {
  75         /* the general stuff */
  76         OID_GEN_SUPPORTED_LIST,
  77         OID_GEN_HARDWARE_STATUS,
  78         OID_GEN_MEDIA_SUPPORTED,
  79         OID_GEN_MEDIA_IN_USE,
  80         OID_GEN_MAXIMUM_FRAME_SIZE,
  81         OID_GEN_LINK_SPEED,
  82         OID_GEN_TRANSMIT_BLOCK_SIZE,
  83         OID_GEN_RECEIVE_BLOCK_SIZE,
  84         OID_GEN_VENDOR_ID,
  85         OID_GEN_VENDOR_DESCRIPTION,
  86         OID_GEN_VENDOR_DRIVER_VERSION,
  87         OID_GEN_CURRENT_PACKET_FILTER,
  88         OID_GEN_MAXIMUM_TOTAL_SIZE,
  89         OID_GEN_MEDIA_CONNECT_STATUS,
  90         OID_GEN_PHYSICAL_MEDIUM,
  91
  92         /* the statistical stuff */
  93         OID_GEN_XMIT_OK,
  94         OID_GEN_RCV_OK,
  95         OID_GEN_XMIT_ERROR,
  96         OID_GEN_RCV_ERROR,
  97         OID_GEN_RCV_NO_BUFFER,
  98 #ifdef  RNDIS_OPTIONAL_STATS
  99         OID_GEN_DIRECTED_BYTES_XMIT,
 100         OID_GEN_DIRECTED_FRAMES_XMIT,
 101         OID_GEN_MULTICAST_BYTES_XMIT,
 102         OID_GEN_MULTICAST_FRAMES_XMIT,
 103         OID_GEN_BROADCAST_BYTES_XMIT,
 104         OID_GEN_BROADCAST_FRAMES_XMIT,
 105         OID_GEN_DIRECTED_BYTES_RCV,
 106         OID_GEN_DIRECTED_FRAMES_RCV,
 107         OID_GEN_MULTICAST_BYTES_RCV,
 108         OID_GEN_MULTICAST_FRAMES_RCV,
 109         OID_GEN_BROADCAST_BYTES_RCV,
 110         OID_GEN_BROADCAST_FRAMES_RCV,
 111         OID_GEN_RCV_CRC_ERROR,
 112         OID_GEN_TRANSMIT_QUEUE_LENGTH,
 113 #endif  /* RNDIS_OPTIONAL_STATS */
 114
 115         /* mandatory 802.3 */
 116         /* the general stuff */
 117         OID_802_3_PERMANENT_ADDRESS,
 118         OID_802_3_CURRENT_ADDRESS,
 119         OID_802_3_MULTICAST_LIST,
 120         OID_802_3_MAC_OPTIONS,
 121         OID_802_3_MAXIMUM_LIST_SIZE,
 122
 123         /* the statistical stuff */
 124         OID_802_3_RCV_ERROR_ALIGNMENT,
 125         OID_802_3_XMIT_ONE_COLLISION,
 126         OID_802_3_XMIT_MORE_COLLISIONS,
 127 #ifdef  RNDIS_OPTIONAL_STATS
 128         OID_802_3_XMIT_DEFERRED,
 129         OID_802_3_XMIT_MAX_COLLISIONS,
 130         OID_802_3_RCV_OVERRUN,
 131         OID_802_3_XMIT_UNDERRUN,
 132         OID_802_3_XMIT_HEARTBEAT_FAILURE,
 133         OID_802_3_XMIT_TIMES_CRS_LOST,
 134         OID_802_3_XMIT_LATE_COLLISIONS,
 135 #endif  /* RNDIS_OPTIONAL_STATS */
 136
 137 #ifdef  RNDIS_PM
 138         /* PM and wakeup are "mandatory" for USB, but the RNDIS specs
 139          * don't say what they mean ... and the NDIS specs are often
 140          * confusing and/or ambiguous in this context.  (That is, more
 141          * so than their specs for the other OIDs.)
 142          *
 143          * FIXME someone who knows what these should do, please
 144          * implement them!
 145          */
 146
 147         /* power management */
 148         OID_PNP_CAPABILITIES,
 149         OID_PNP_QUERY_POWER,
 150         OID_PNP_SET_POWER,
 151
 152 #ifdef  RNDIS_WAKEUP
 153         /* wake up host */
 154         OID_PNP_ENABLE_WAKE_UP,
 155         OID_PNP_ADD_WAKE_UP_PATTERN,
 156         OID_PNP_REMOVE_WAKE_UP_PATTERN,
 157 #endif  /* RNDIS_WAKEUP */
 158 #endif  /* RNDIS_PM */
 159 };
 160
 161
 162 /* NDIS Functions */
 163 static int
 164 gen_ndis_query_resp (int configNr, u32 OID, u8 *buf, unsigned buf_len,
 165                 rndis_resp_t *r)
 166 {
 167         int                     retval = -ENOTSUPP;
 168         u32                     length = 4;     /* usually */
 169         __le32                  *outbuf;
 170         int                     i, count;
 171         rndis_query_cmplt_type  *resp;
 172         struct net_device       *net;
 173         const struct net_device_stats   *stats;
 174
 175         if (!r) return -ENOMEM;
 176         resp = (rndis_query_cmplt_type *) r->buf;
 177
 178         if (!resp) return -ENOMEM;
 179
 180         if (buf_len && rndis_debug > 1) {
 181                 pr_debug("query OID %08x value, len %d:\n", OID, buf_len);
 182                 for (i = 0; i < buf_len; i += 16) {
 183                         pr_debug("%03d: %08x %08x %08x %08x\n", i,
 184                                 get_unaligned_le32(&buf[i]),
 185                                 get_unaligned_le32(&buf[i + 4]),
 186                                 get_unaligned_le32(&buf[i + 8]),
 187                                 get_unaligned_le32(&buf[i + 12]));
 188                 }
 189         }
 190
 191         /* response goes here, right after the header */
 192         outbuf = (__le32 *) &resp[1];
 193         resp->InformationBufferOffset = cpu_to_le32 (16);
 194
 195         net = rndis_per_dev_params[configNr].dev;
 196         stats = dev_get_stats(net);
 197
 198         switch (OID) {
 199
 200         /* general oids (table 4-1) */
 201
 202         /* mandatory */
 203         case OID_GEN_SUPPORTED_LIST:
 204                 pr_debug("%s: OID_GEN_SUPPORTED_LIST\n", __func__);
 205                 length = sizeof (oid_supported_list);
 206                 count  = length / sizeof (u32);
 207                 for (i = 0; i < count; i++)
 208                         outbuf[i] = cpu_to_le32 (oid_supported_list[i]);
 209                 retval = 0;
 210                 break;
 211
 212         /* mandatory */
 213         case OID_GEN_HARDWARE_STATUS:
 214                 pr_debug("%s: OID_GEN_HARDWARE_STATUS\n", __func__);
 215                 /* Bogus question!
 216                  * Hardware must be ready to receive high level protocols.
 217                  * BTW:
 218                  * reddite ergo quae sunt Caesaris Caesari
 219                  * et quae sunt Dei Deo!
 220                  */
 221                 *outbuf = cpu_to_le32 (0);
 222                 retval = 0;
 223                 break;
 224
 225         /* mandatory */
 226         case OID_GEN_MEDIA_SUPPORTED:
 227                 pr_debug("%s: OID_GEN_MEDIA_SUPPORTED\n", __func__);
 228                 *outbuf = cpu_to_le32 (rndis_per_dev_params [configNr].medium);
 229                 retval = 0;
 230                 break;
 231
 232         /* mandatory */
 233         case OID_GEN_MEDIA_IN_USE:
 234                 pr_debug("%s: OID_GEN_MEDIA_IN_USE\n", __func__);
 235                 /* one medium, one transport... (maybe you do it better) */
 236                 *outbuf = cpu_to_le32 (rndis_per_dev_params [configNr].medium);
 237                 retval = 0;
 238                 break;
 239
 240         /* mandatory */
 241         case OID_GEN_MAXIMUM_FRAME_SIZE:
 242                 pr_debug("%s: OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
 243                 if (rndis_per_dev_params [configNr].dev) {
 244                         *outbuf = cpu_to_le32 (
 245                                 rndis_per_dev_params [configNr].dev->mtu);
 246                         retval = 0;
 247                 }
 248                 break;
 249
 250         /* mandatory */
 251         case OID_GEN_LINK_SPEED:
 252                 if (rndis_debug > 1)
 253                         pr_debug("%s: OID_GEN_LINK_SPEED\n", __func__);
 254                 if (rndis_per_dev_params [configNr].media_state
 255                                 == NDIS_MEDIA_STATE_DISCONNECTED)
 256                         *outbuf = cpu_to_le32 (0);
 257                 else
 258                         *outbuf = cpu_to_le32 (
 259                                 rndis_per_dev_params [configNr].speed);
 260                 retval = 0;
 261                 break;
 262
 263         /* mandatory */
 264         case OID_GEN_TRANSMIT_BLOCK_SIZE:
 265                 pr_debug("%s: OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
 266                 if (rndis_per_dev_params [configNr].dev) {
 267                         *outbuf = cpu_to_le32 (
 268                                 rndis_per_dev_params [configNr].dev->mtu);
 269                         retval = 0;
 270                 }
 271                 break;
 272
 273         /* mandatory */
 274         case OID_GEN_RECEIVE_BLOCK_SIZE:
 275                 pr_debug("%s: OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
 276                 if (rndis_per_dev_params [configNr].dev) {
 277                         *outbuf = cpu_to_le32 (
 278                                 rndis_per_dev_params [configNr].dev->mtu);
 279                         retval = 0;
 280                 }
 281                 break;
 282
 283         /* mandatory */
 284         case OID_GEN_VENDOR_ID:
 285                 pr_debug("%s: OID_GEN_VENDOR_ID\n", __func__);
 286                 *outbuf = cpu_to_le32 (
 287                         rndis_per_dev_params [configNr].vendorID);
 288                 retval = 0;
 289                 break;
 290
 291         /* mandatory */
 292         case OID_GEN_VENDOR_DESCRIPTION:
 293                 pr_debug("%s: OID_GEN_VENDOR_DESCRIPTION\n", __func__);
 294                 length = strlen (rndis_per_dev_params [configNr].vendorDescr);
 295                 memcpy (outbuf,
 296                         rndis_per_dev_params [configNr].vendorDescr, length);
 297                 retval = 0;
 298                 break;
 299
 300         case OID_GEN_VENDOR_DRIVER_VERSION:
 301                 pr_debug("%s: OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
 302                 /* Created as LE */
 303                 *outbuf = rndis_driver_version;
 304                 retval = 0;
 305                 break;
 306
 307         /* mandatory */
 308         case OID_GEN_CURRENT_PACKET_FILTER:
 309                 pr_debug("%s: OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
 310                 *outbuf = cpu_to_le32 (*rndis_per_dev_params[configNr].filter);
 311                 retval = 0;
 312                 break;
 313
 314         /* mandatory */
 315         case OID_GEN_MAXIMUM_TOTAL_SIZE:
 316                 pr_debug("%s: OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
 317                 *outbuf = cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
 318                 retval = 0;
 319                 break;
 320
 321         /* mandatory */
 322         case OID_GEN_MEDIA_CONNECT_STATUS:
 323                 if (rndis_debug > 1)
 324                         pr_debug("%s: OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
 325                 *outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
 326                                                 .media_state);
 327                 retval = 0;
 328                 break;
 329
 330         case OID_GEN_PHYSICAL_MEDIUM:
 331                 pr_debug("%s: OID_GEN_PHYSICAL_MEDIUM\n", __func__);
 332                 *outbuf = cpu_to_le32 (0);
 333                 retval = 0;
 334                 break;
 335
 336         /* The RNDIS specification is incomplete/wrong.   Some versions
 337          * of MS-Windows expect OIDs that aren't specified there.  Other
 338          * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
 339          */
 340         case OID_GEN_MAC_OPTIONS:               /* from WinME */
 341                 pr_debug("%s: OID_GEN_MAC_OPTIONS\n", __func__);
 342                 *outbuf = cpu_to_le32(
 343                           NDIS_MAC_OPTION_RECEIVE_SERIALIZED
 344                         | NDIS_MAC_OPTION_FULL_DUPLEX);
 345                 retval = 0;
 346                 break;
 347
 348         /* statistics OIDs (table 4-2) */
 349
 350         /* mandatory */
 351         case OID_GEN_XMIT_OK:
 352                 if (rndis_debug > 1)
 353                         pr_debug("%s: OID_GEN_XMIT_OK\n", __func__);
 354                 if (stats) {
 355                         *outbuf = cpu_to_le32(stats->tx_packets
 356                                 - stats->tx_errors - stats->tx_dropped);
 357                         retval = 0;
 358                 }
 359                 break;
 360
 361         /* mandatory */
 362         case OID_GEN_RCV_OK:
 363                 if (rndis_debug > 1)
 364                         pr_debug("%s: OID_GEN_RCV_OK\n", __func__);
 365                 if (stats) {
 366                         *outbuf = cpu_to_le32(stats->rx_packets
 367                                 - stats->rx_errors - stats->rx_dropped);
 368                         retval = 0;
 369                 }
 370                 break;
 371
 372         /* mandatory */
 373         case OID_GEN_XMIT_ERROR:
 374                 if (rndis_debug > 1)
 375                         pr_debug("%s: OID_GEN_XMIT_ERROR\n", __func__);
 376                 if (stats) {
 377                         *outbuf = cpu_to_le32(stats->tx_errors);
 378                         retval = 0;
 379                 }
 380                 break;
 381
 382         /* mandatory */
 383         case OID_GEN_RCV_ERROR:
 384                 if (rndis_debug > 1)
 385                         pr_debug("%s: OID_GEN_RCV_ERROR\n", __func__);
 386                 if (stats) {
 387                         *outbuf = cpu_to_le32(stats->rx_errors);
 388                         retval = 0;
 389                 }
 390                 break;
 391
 392         /* mandatory */
 393         case OID_GEN_RCV_NO_BUFFER:
 394                 pr_debug("%s: OID_GEN_RCV_NO_BUFFER\n", __func__);
 395                 if (stats) {
 396                         *outbuf = cpu_to_le32(stats->rx_dropped);
 397                         retval = 0;
 398                 }
 399                 break;
 400
 401         /* ieee802.3 OIDs (table 4-3) */
 402
 403         /* mandatory */
 404         case OID_802_3_PERMANENT_ADDRESS:
 405                 pr_debug("%s: OID_802_3_PERMANENT_ADDRESS\n", __func__);
 406                 if (rndis_per_dev_params [configNr].dev) {
 407                         length = ETH_ALEN;
 408                         memcpy (outbuf,
 409                                 rndis_per_dev_params [configNr].host_mac,
 410                                 length);
 411                         retval = 0;
 412                 }
 413                 break;
 414
 415         /* mandatory */
 416         case OID_802_3_CURRENT_ADDRESS:
 417                 pr_debug("%s: OID_802_3_CURRENT_ADDRESS\n", __func__);
 418                 if (rndis_per_dev_params [configNr].dev) {
 419                         length = ETH_ALEN;
 420                         memcpy (outbuf,
 421                                 rndis_per_dev_params [configNr].host_mac,
 422                                 length);
 423                         retval = 0;
 424                 }
 425                 break;
 426
 427         /* mandatory */
 428         case OID_802_3_MULTICAST_LIST:
 429                 pr_debug("%s: OID_802_3_MULTICAST_LIST\n", __func__);
 430                 /* Multicast base address only */
 431                 *outbuf = cpu_to_le32 (0xE0000000);
 432                 retval = 0;
 433                 break;
 434
 435         /* mandatory */
 436         case OID_802_3_MAXIMUM_LIST_SIZE:
 437                 pr_debug("%s: OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
 438                 /* Multicast base address only */
 439                 *outbuf = cpu_to_le32 (1);
 440                 retval = 0;
 441                 break;
 442
 443         case OID_802_3_MAC_OPTIONS:
 444                 pr_debug("%s: OID_802_3_MAC_OPTIONS\n", __func__);
 445                 break;
 446
 447         /* ieee802.3 statistics OIDs (table 4-4) */
 448
 449         /* mandatory */
 450         case OID_802_3_RCV_ERROR_ALIGNMENT:
 451                 pr_debug("%s: OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
 452                 if (stats) {
 453                         *outbuf = cpu_to_le32(stats->rx_frame_errors);
 454                         retval = 0;
 455                 }
 456                 break;
 457
 458         /* mandatory */
 459         case OID_802_3_XMIT_ONE_COLLISION:
 460                 pr_debug("%s: OID_802_3_XMIT_ONE_COLLISION\n", __func__);
 461                 *outbuf = cpu_to_le32 (0);
 462                 retval = 0;
 463                 break;
 464
 465         /* mandatory */
 466         case OID_802_3_XMIT_MORE_COLLISIONS:
 467                 pr_debug("%s: OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
 468                 *outbuf = cpu_to_le32 (0);
 469                 retval = 0;
 470                 break;
 471
 472         default:
 473                 pr_warning("%s: query unknown OID 0x%08X\n",
 474                          __func__, OID);
 475         }
 476         if (retval < 0)
 477                 length = 0;
 478
 479         resp->InformationBufferLength = cpu_to_le32 (length);
 480         r->length = length + sizeof *resp;
 481         resp->MessageLength = cpu_to_le32 (r->length);
 482         return retval;
 483 }
 484
 485 static int gen_ndis_set_resp (u8 configNr, u32 OID, u8 *buf, u32 buf_len,
 486                         rndis_resp_t *r)
 487 {
 488         rndis_set_cmplt_type            *resp;
 489         int                             i, retval = -ENOTSUPP;
 490         struct rndis_params             *params;
 491
 492         if (!r)
 493                 return -ENOMEM;
 494         resp = (rndis_set_cmplt_type *) r->buf;
 495         if (!resp)
 496                 return -ENOMEM;
 497
 498         if (buf_len && rndis_debug > 1) {
 499                 pr_debug("set OID %08x value, len %d:\n", OID, buf_len);
 500                 for (i = 0; i < buf_len; i += 16) {
 501                         pr_debug("%03d: %08x %08x %08x %08x\n", i,
 502                                 get_unaligned_le32(&buf[i]),
 503                                 get_unaligned_le32(&buf[i + 4]),
 504                                 get_unaligned_le32(&buf[i + 8]),
 505                                 get_unaligned_le32(&buf[i + 12]));
 506                 }
 507         }
 508
 509         params = &rndis_per_dev_params [configNr];
 510         switch (OID) {
 511         case 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: 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 OID_802_3_MULTICAST_LIST:
 541                 /* I think we can ignore this */
 542                 pr_debug("%s: OID_802_3_MULTICAST_LIST\n", __func__);
 543                 retval = 0;
 544                 break;
 545
 546         default:
 547                 pr_warning("%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
 558 static int rndis_init_response (int configNr, rndis_init_msg_type *buf)
 559 {
 560         rndis_init_cmplt_type   *resp;
 561         rndis_resp_t            *r;
 562         struct rndis_params     *params = rndis_per_dev_params + configNr;
 563
 564         if (!params->dev)
 565                 return -ENOTSUPP;
 566
 567         r = rndis_add_response (configNr, 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 (
 573                         REMOTE_NDIS_INITIALIZE_CMPLT);
 574         resp->MessageLength = cpu_to_le32 (52);
 575         resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
 576         resp->Status = cpu_to_le32 (RNDIS_STATUS_SUCCESS);
 577         resp->MajorVersion = cpu_to_le32 (RNDIS_MAJOR_VERSION);
 578         resp->MinorVersion = cpu_to_le32 (RNDIS_MINOR_VERSION);
 579         resp->DeviceFlags = cpu_to_le32 (RNDIS_DF_CONNECTIONLESS);
 580         resp->Medium = cpu_to_le32 (RNDIS_MEDIUM_802_3);
 581         resp->MaxPacketsPerTransfer = cpu_to_le32 (1);
 582         resp->MaxTransferSize = cpu_to_le32 (
 583                   params->dev->mtu
 584                 + sizeof (struct ethhdr)
 585                 + sizeof (struct rndis_packet_msg_type)
 586                 + 22);
 587         resp->PacketAlignmentFactor = cpu_to_le32 (0);
 588         resp->AFListOffset = cpu_to_le32 (0);
 589         resp->AFListSize = cpu_to_le32 (0);
 590
 591         params->resp_avail(params->v);
 592         return 0;
 593 }
 594
 595 static int rndis_query_response (int configNr, rndis_query_msg_type *buf)
 596 {
 597         rndis_query_cmplt_type *resp;
 598         rndis_resp_t            *r;
 599         struct rndis_params     *params = rndis_per_dev_params + configNr;
 600
 601         /* pr_debug("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID)); */
 602         if (!params->dev)
 603                 return -ENOTSUPP;
 604
 605         /*
 606          * we need more memory:
 607          * gen_ndis_query_resp expects enough space for
 608          * rndis_query_cmplt_type followed by data.
 609          * oid_supported_list is the largest data reply
 610          */
 611         r = rndis_add_response (configNr,
 612                 sizeof (oid_supported_list) + sizeof(rndis_query_cmplt_type));
 613         if (!r)
 614                 return -ENOMEM;
 615         resp = (rndis_query_cmplt_type *) r->buf;
 616
 617         resp->MessageType = cpu_to_le32 (REMOTE_NDIS_QUERY_CMPLT);
 618         resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
 619
 620         if (gen_ndis_query_resp (configNr, le32_to_cpu (buf->OID),
 621                         le32_to_cpu(buf->InformationBufferOffset)
 622                                         + 8 + (u8 *) buf,
 623                         le32_to_cpu(buf->InformationBufferLength),
 624                         r)) {
 625                 /* OID not supported */
 626                 resp->Status = cpu_to_le32 (
 627                                 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
 638 static int rndis_set_response (int configNr, rndis_set_msg_type *buf)
 639 {
 640         u32                     BufLength, BufOffset;
 641         rndis_set_cmplt_type    *resp;
 642         rndis_resp_t            *r;
 643         struct rndis_params     *params = rndis_per_dev_params + configNr;
 644
 645         r = rndis_add_response (configNr, 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 (REMOTE_NDIS_SET_CMPLT);
 666         resp->MessageLength = cpu_to_le32 (16);
 667         resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
 668         if (gen_ndis_set_resp (configNr, 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
 678 static int rndis_reset_response (int configNr, rndis_reset_msg_type *buf)
 679 {
 680         rndis_reset_cmplt_type  *resp;
 681         rndis_resp_t            *r;
 682         struct rndis_params     *params = rndis_per_dev_params + configNr;
 683
 684         r = rndis_add_response (configNr, 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 (REMOTE_NDIS_RESET_CMPLT);
 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
 699 static int rndis_keepalive_response (int configNr,
 700                                 rndis_keepalive_msg_type *buf)
 701 {
 702         rndis_keepalive_cmplt_type      *resp;
 703         rndis_resp_t                    *r;
 704         struct rndis_params     *params = rndis_per_dev_params + configNr;
 705
 706         /* host "should" check only in RNDIS_DATA_INITIALIZED state */
 707
 708         r = rndis_add_response (configNr, sizeof (rndis_keepalive_cmplt_type));
 709         if (!r)
 710                 return -ENOMEM;
 711         resp = (rndis_keepalive_cmplt_type *) r->buf;
 712
 713         resp->MessageType = cpu_to_le32 (
 714                         REMOTE_NDIS_KEEPALIVE_CMPLT);
 715         resp->MessageLength = cpu_to_le32 (16);
 716         resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
 717         resp->Status = cpu_to_le32 (RNDIS_STATUS_SUCCESS);
 718
 719         params->resp_avail(params->v);
 720         return 0;
 721 }
 722
 723
 724 /*
 725  * Device to Host Comunication
 726  */
 727 static int rndis_indicate_status_msg (int configNr, u32 status)
 728 {
 729         rndis_indicate_status_msg_type  *resp;
 730         rndis_resp_t                    *r;
 731         struct rndis_params     *params = rndis_per_dev_params + configNr;
 732
 733         if (params->state == RNDIS_UNINITIALIZED)
 734                 return -ENOTSUPP;
 735
 736         r = rndis_add_response (configNr,
 737                                 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 (
 743                         REMOTE_NDIS_INDICATE_STATUS_MSG);
 744         resp->MessageLength = cpu_to_le32 (20);
 745         resp->Status = cpu_to_le32 (status);
 746         resp->StatusBufferLength = cpu_to_le32 (0);
 747         resp->StatusBufferOffset = cpu_to_le32 (0);
 748
 749         params->resp_avail(params->v);
 750         return 0;
 751 }
 752
 753 int rndis_signal_connect (int configNr)
 754 {
 755         rndis_per_dev_params [configNr].media_state
 756                         = NDIS_MEDIA_STATE_CONNECTED;
 757         return rndis_indicate_status_msg (configNr,
 758                                           RNDIS_STATUS_MEDIA_CONNECT);
 759 }
 760
 761 int rndis_signal_disconnect (int configNr)
 762 {
 763         rndis_per_dev_params [configNr].media_state
 764                         = NDIS_MEDIA_STATE_DISCONNECTED;
 765         return rndis_indicate_status_msg (configNr,
 766                                           RNDIS_STATUS_MEDIA_DISCONNECT);
 767 }
 768
 769 void rndis_uninit (int configNr)
 770 {
 771         u8 *buf;
 772         u32 length;
 773
 774         if (configNr >= RNDIS_MAX_CONFIGS)
 775                 return;
 776         rndis_per_dev_params [configNr].state = RNDIS_UNINITIALIZED;
 777
 778         /* drain the response queue */
 779         while ((buf = rndis_get_next_response(configNr, &length)))
 780                 rndis_free_response(configNr, buf);
 781 }
 782
 783 void rndis_set_host_mac (int configNr, const u8 *addr)
 784 {
 785         rndis_per_dev_params [configNr].host_mac = addr;
 786 }
 787
 788 /*
 789  * Message Parser
 790  */
 791 int rndis_msg_parser (u8 configNr, u8 *buf)
 792 {
 793         u32 MsgType, MsgLength;
 794         __le32 *tmp;
 795         struct rndis_params             *params;
 796
 797         if (!buf)
 798                 return -ENOMEM;
 799
 800         tmp = (__le32 *) buf;
 801         MsgType   = get_unaligned_le32(tmp++);
 802         MsgLength = get_unaligned_le32(tmp++);
 803
 804         if (configNr >= RNDIS_MAX_CONFIGS)
 805                 return -ENOTSUPP;
 806         params = &rndis_per_dev_params [configNr];
 807
 808         /* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
 809          * rx/tx statistics and link status, in addition to KEEPALIVE traffic
 810          * and normal HC level polling to see if there's any IN traffic.
 811          */
 812
 813         /* For USB: responses may take up to 10 seconds */
 814         switch (MsgType) {
 815         case REMOTE_NDIS_INITIALIZE_MSG:
 816                 pr_debug("%s: REMOTE_NDIS_INITIALIZE_MSG\n",
 817                         __func__ );
 818                 params->state = RNDIS_INITIALIZED;
 819                 return  rndis_init_response (configNr,
 820                                         (rndis_init_msg_type *) buf);
 821
 822         case REMOTE_NDIS_HALT_MSG:
 823                 pr_debug("%s: REMOTE_NDIS_HALT_MSG\n",
 824                         __func__ );
 825                 params->state = RNDIS_UNINITIALIZED;
 826                 if (params->dev) {
 827                         netif_carrier_off (params->dev);
 828                         netif_stop_queue (params->dev);
 829                 }
 830                 return 0;
 831
 832         case REMOTE_NDIS_QUERY_MSG:
 833                 return rndis_query_response (configNr,
 834                                         (rndis_query_msg_type *) buf);
 835
 836         case REMOTE_NDIS_SET_MSG:
 837                 return rndis_set_response (configNr,
 838                                         (rndis_set_msg_type *) buf);
 839
 840         case REMOTE_NDIS_RESET_MSG:
 841                 pr_debug("%s: REMOTE_NDIS_RESET_MSG\n",
 842                         __func__ );
 843                 return rndis_reset_response (configNr,
 844                                         (rndis_reset_msg_type *) buf);
 845
 846         case REMOTE_NDIS_KEEPALIVE_MSG:
 847                 /* For USB: host does this every 5 seconds */
 848                 if (rndis_debug > 1)
 849                         pr_debug("%s: REMOTE_NDIS_KEEPALIVE_MSG\n",
 850                                 __func__ );
 851                 return rndis_keepalive_response (configNr,
 852                                                  (rndis_keepalive_msg_type *)
 853                                                  buf);
 854
 855         default:
 856                 /* At least Windows XP emits some undefined RNDIS messages.
 857                  * In one case those messages seemed to relate to the host
 858                  * suspending itself.
 859                  */
 860                 pr_warning("%s: unknown RNDIS message 0x%08X len %d\n",
 861                         __func__ , MsgType, MsgLength);
 862                 {
 863                         unsigned i;
 864                         for (i = 0; i < MsgLength; i += 16) {
 865                                 pr_debug("%03d: "
 866                                         " %02x %02x %02x %02x"
 867                                         " %02x %02x %02x %02x"
 868                                         " %02x %02x %02x %02x"
 869                                         " %02x %02x %02x %02x"
 870                                         "\n",
 871                                         i,
 872                                         buf[i], buf [i+1],
 873                                                 buf[i+2], buf[i+3],
 874                                         buf[i+4], buf [i+5],
 875                                                 buf[i+6], buf[i+7],
 876                                         buf[i+8], buf [i+9],
 877                                                 buf[i+10], buf[i+11],
 878                                         buf[i+12], buf [i+13],
 879                                                 buf[i+14], buf[i+15]);
 880                         }
 881                 }
 882                 break;
 883         }
 884
 885         return -ENOTSUPP;
 886 }
 887
 888 int rndis_register(void (*resp_avail)(void *v), void *v)
 889 {
 890         u8 i;
 891
 892         if (!resp_avail)
 893                 return -EINVAL;
 894
 895         for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
 896                 if (!rndis_per_dev_params [i].used) {
 897                         rndis_per_dev_params [i].used = 1;
 898                         rndis_per_dev_params [i].resp_avail = resp_avail;
 899                         rndis_per_dev_params [i].v = v;
 900                         pr_debug("%s: configNr = %d\n", __func__, i);
 901                         return i;
 902                 }
 903         }
 904         pr_debug("failed\n");
 905
 906         return -ENODEV;
 907 }
 908
 909 void rndis_deregister (int configNr)
 910 {
 911         pr_debug("%s: \n", __func__);
 912
 913         if (configNr >= RNDIS_MAX_CONFIGS) return;
 914         rndis_per_dev_params [configNr].used = 0;
 915
 916         return;
 917 }
 918
 919 int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
 920 {
 921         pr_debug("%s:\n", __func__);
 922         if (!dev)
 923                 return -EINVAL;
 924         if (configNr >= RNDIS_MAX_CONFIGS) return -1;
 925
 926         rndis_per_dev_params [configNr].dev = dev;
 927         rndis_per_dev_params [configNr].filter = cdc_filter;
 928
 929         return 0;
 930 }
 931
 932 int rndis_set_param_vendor (u8 configNr, u32 vendorID, const char *vendorDescr)
 933 {
 934         pr_debug("%s:\n", __func__);
 935         if (!vendorDescr) return -1;
 936         if (configNr >= RNDIS_MAX_CONFIGS) return -1;
 937
 938         rndis_per_dev_params [configNr].vendorID = vendorID;
 939         rndis_per_dev_params [configNr].vendorDescr = vendorDescr;
 940
 941         return 0;
 942 }
 943
 944 int rndis_set_param_medium (u8 configNr, u32 medium, u32 speed)
 945 {
 946         pr_debug("%s: %u %u\n", __func__, medium, speed);
 947         if (configNr >= RNDIS_MAX_CONFIGS) return -1;
 948
 949         rndis_per_dev_params [configNr].medium = medium;
 950         rndis_per_dev_params [configNr].speed = speed;
 951
 952         return 0;
 953 }
 954
 955 void rndis_add_hdr (struct sk_buff *skb)
 956 {
 957         struct rndis_packet_msg_type    *header;
 958
 959         if (!skb)
 960                 return;
 961         header = (void *) skb_push (skb, sizeof *header);
 962         memset (header, 0, sizeof *header);
 963         header->MessageType = cpu_to_le32(REMOTE_NDIS_PACKET_MSG);
 964         header->MessageLength = cpu_to_le32(skb->len);
 965         header->DataOffset = cpu_to_le32 (36);
 966         header->DataLength = cpu_to_le32(skb->len - sizeof *header);
 967 }
 968
 969 void rndis_free_response (int configNr, u8 *buf)
 970 {
 971         rndis_resp_t            *r;
 972         struct list_head        *act, *tmp;
 973
 974         list_for_each_safe (act, tmp,
 975                         &(rndis_per_dev_params [configNr].resp_queue))
 976         {
 977                 r = list_entry (act, rndis_resp_t, list);
 978                 if (r && r->buf == buf) {
 979                         list_del (&r->list);
 980                         kfree (r);
 981                 }
 982         }
 983 }
 984
 985 u8 *rndis_get_next_response (int configNr, u32 *length)
 986 {
 987         rndis_resp_t            *r;
 988         struct list_head        *act, *tmp;
 989
 990         if (!length) return NULL;
 991
 992         list_for_each_safe (act, tmp,
 993                         &(rndis_per_dev_params [configNr].resp_queue))
 994         {
 995                 r = list_entry (act, rndis_resp_t, list);
 996                 if (!r->send) {
 997                         r->send = 1;
 998                         *length = r->length;
 999                         return r->buf;
1000                 }
1001         }
1002
1003         return NULL;
1004 }
1005
1006 static rndis_resp_t *rndis_add_response (int configNr, u32 length)
1007 {
1008         rndis_resp_t    *r;
1009
1010         /* NOTE:  this gets copied into ether.c USB_BUFSIZ bytes ... */
1011         r = kmalloc (sizeof (rndis_resp_t) + length, GFP_ATOMIC);
1012         if (!r) return NULL;
1013
1014         r->buf = (u8 *) (r + 1);
1015         r->length = length;
1016         r->send = 0;
1017
1018         list_add_tail (&r->list,
1019                 &(rndis_per_dev_params [configNr].resp_queue));
1020         return r;
1021 }
1022
1023 int rndis_rm_hdr(struct sk_buff *skb)
1024 {
1025         /* tmp points to a struct rndis_packet_msg_type */
1026         __le32          *tmp = (void *) skb->data;
1027
1028         /* MessageType, MessageLength */
1029         if (cpu_to_le32(REMOTE_NDIS_PACKET_MSG)
1030                         != get_unaligned(tmp++))
1031                 return -EINVAL;
1032         tmp++;
1033
1034         /* DataOffset, DataLength */
1035         if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8))
1036                 return -EOVERFLOW;
1037         skb_trim(skb, get_unaligned_le32(tmp++));
1038
1039         return 0;
1040 }
1041
1042 #ifdef  CONFIG_USB_GADGET_DEBUG_FILES
1043
1044 static int rndis_proc_show(struct seq_file *m, void *v)
1045 {
1046         rndis_params *param = m->private;
1047
1048         seq_printf(m,
1049                          "Config Nr. %d\n"
1050                          "used      : %s\n"
1051                          "state     : %s\n"
1052                          "medium    : 0x%08X\n"
1053                          "speed     : %d\n"
1054                          "cable     : %s\n"
1055                          "vendor ID : 0x%08X\n"
1056                          "vendor    : %s\n",
1057                          param->confignr, (param->used) ? "y" : "n",
1058                          ({ char *s = "?";
1059                          switch (param->state) {
1060                          case RNDIS_UNINITIALIZED:
1061                                 s = "RNDIS_UNINITIALIZED"; break;
1062                          case RNDIS_INITIALIZED:
1063                                 s = "RNDIS_INITIALIZED"; break;
1064                          case RNDIS_DATA_INITIALIZED:
1065                                 s = "RNDIS_DATA_INITIALIZED"; break;
1066                         }; s; }),
1067                          param->medium,
1068                          (param->media_state) ? 0 : param->speed*100,
1069                          (param->media_state) ? "disconnected" : "connected",
1070                          param->vendorID, param->vendorDescr);
1071         return 0;
1072 }
1073
1074 static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
1075                 size_t count, loff_t *ppos)
1076 {
1077         rndis_params *p = PDE(file->f_path.dentry->d_inode)->data;
1078         u32 speed = 0;
1079         int i, fl_speed = 0;
1080
1081         for (i = 0; i < count; i++) {
1082                 char c;
1083                 if (get_user(c, buffer))
1084                         return -EFAULT;
1085                 switch (c) {
1086                 case '0':
1087                 case '1':
1088                 case '2':
1089                 case '3':
1090                 case '4':
1091                 case '5':
1092                 case '6':
1093                 case '7':
1094                 case '8':
1095                 case '9':
1096                         fl_speed = 1;
1097                         speed = speed*10 + c - '0';
1098                         break;
1099                 case 'C':
1100                 case 'c':
1101                         rndis_signal_connect (p->confignr);
1102                         break;
1103                 case 'D':
1104                 case 'd':
1105                         rndis_signal_disconnect(p->confignr);
1106                         break;
1107                 default:
1108                         if (fl_speed) p->speed = speed;
1109                         else pr_debug("%c is not valid\n", c);
1110                         break;
1111                 }
1112
1113                 buffer++;
1114         }
1115
1116         return count;
1117 }
1118
1119 static int rndis_proc_open(struct inode *inode, struct file *file)
1120 {
1121         return single_open(file, rndis_proc_show, PDE(inode)->data);
1122 }
1123
1124 static const struct file_operations rndis_proc_fops = {
1125         .owner          = THIS_MODULE,
1126         .open           = rndis_proc_open,
1127         .read           = seq_read,
1128         .llseek         = seq_lseek,
1129         .release        = single_release,
1130         .write          = rndis_proc_write,
1131 };
1132
1133 #define NAME_TEMPLATE   "driver/rndis-%03d"
1134
1135 static struct proc_dir_entry *rndis_connect_state [RNDIS_MAX_CONFIGS];
1136
1137 #endif  /* CONFIG_USB_GADGET_DEBUG_FILES */
1138
1139
1140 int __init rndis_init (void)
1141 {
1142         u8 i;
1143
1144         for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
1145 #ifdef  CONFIG_USB_GADGET_DEBUG_FILES
1146                 char name [20];
1147
1148                 sprintf (name, NAME_TEMPLATE, i);
1149                 if (!(rndis_connect_state [i]
1150                                 = proc_create_data(name, 0660, NULL,
1151                                         &rndis_proc_fops,
1152                                         (void *)(rndis_per_dev_params + i))))
1153                 {
1154                         pr_debug("%s :remove entries", __func__);
1155                         while (i) {
1156                                 sprintf (name, NAME_TEMPLATE, --i);
1157                                 remove_proc_entry (name, NULL);
1158                         }
1159                         pr_debug("\n");
1160                         return -EIO;
1161                 }
1162 #endif
1163                 rndis_per_dev_params [i].confignr = i;
1164                 rndis_per_dev_params [i].used = 0;
1165                 rndis_per_dev_params [i].state = RNDIS_UNINITIALIZED;
1166                 rndis_per_dev_params [i].media_state
1167                                 = NDIS_MEDIA_STATE_DISCONNECTED;
1168                 INIT_LIST_HEAD (&(rndis_per_dev_params [i].resp_queue));
1169         }
1170
1171         return 0;
1172 }
1173
1174 void rndis_exit (void)
1175 {
1176 #ifdef  CONFIG_USB_GADGET_DEBUG_FILES
1177         u8 i;
1178         char name [20];
1179
1180         for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
1181                 sprintf (name, NAME_TEMPLATE, i);
1182                 remove_proc_entry (name, NULL);
1183         }
1184 #endif
1185 }
1186