drivers/usb/net/rndis_host.c

   1 /*
   2  * Host Side support for RNDIS Networking Links
   3  * Copyright (C) 2005 by David Brownell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 // #define      DEBUG                   // error path messages, extra info
  21 // #define      VERBOSE                 // more; success messages
  22
  23 #include <linux/config.h>
  24 #include <linux/module.h>
  25 #include <linux/sched.h>
  26 #include <linux/init.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/ethtool.h>
  30 #include <linux/workqueue.h>
  31 #include <linux/mii.h>
  32 #include <linux/usb.h>
  33 #include <linux/usb_cdc.h>
  34
  35 #include "usbnet.h"
  36
  37
  38 /*
  39  * RNDIS is NDIS remoted over USB.  It's a MSFT variant of CDC ACM ... of
  40  * course ACM was intended for modems, not Ethernet links!  USB's standard
  41  * for Ethernet links is "CDC Ethernet", which is significantly simpler.
  42  */
  43
  44 /*
  45  * CONTROL uses CDC "encapsulated commands" with funky notifications.
  46  *  - control-out:  SEND_ENCAPSULATED
  47  *  - interrupt-in:  RESPONSE_AVAILABLE
  48  *  - control-in:  GET_ENCAPSULATED
  49  *
  50  * We'll try to ignore the RESPONSE_AVAILABLE notifications.
  51  */
  52 struct rndis_msg_hdr {
  53         __le32  msg_type;                       /* RNDIS_MSG_* */
  54         __le32  msg_len;
  55         // followed by data that varies between messages
  56         __le32  request_id;
  57         __le32  status;
  58         // ... and more
  59 } __attribute__ ((packed));
  60
  61 /* RNDIS defines this (absurdly huge) control timeout */
  62 #define RNDIS_CONTROL_TIMEOUT_MS        (10 * 1000)
  63
  64
  65 #define ccpu2 __constant_cpu_to_le32
  66
  67 #define RNDIS_MSG_COMPLETION    ccpu2(0x80000000)
  68
  69 /* codes for "msg_type" field of rndis messages;
  70  * only the data channel uses packet messages (maybe batched);
  71  * everything else goes on the control channel.
  72  */
  73 #define RNDIS_MSG_PACKET        ccpu2(0x00000001)       /* 1-N packets */
  74 #define RNDIS_MSG_INIT          ccpu2(0x00000002)
  75 #define RNDIS_MSG_INIT_C        (RNDIS_MSG_INIT|RNDIS_MSG_COMPLETION)
  76 #define RNDIS_MSG_HALT          ccpu2(0x00000003)
  77 #define RNDIS_MSG_QUERY         ccpu2(0x00000004)
  78 #define RNDIS_MSG_QUERY_C       (RNDIS_MSG_QUERY|RNDIS_MSG_COMPLETION)
  79 #define RNDIS_MSG_SET           ccpu2(0x00000005)
  80 #define RNDIS_MSG_SET_C         (RNDIS_MSG_SET|RNDIS_MSG_COMPLETION)
  81 #define RNDIS_MSG_RESET         ccpu2(0x00000006)
  82 #define RNDIS_MSG_RESET_C       (RNDIS_MSG_RESET|RNDIS_MSG_COMPLETION)
  83 #define RNDIS_MSG_INDICATE      ccpu2(0x00000007)
  84 #define RNDIS_MSG_KEEPALIVE     ccpu2(0x00000008)
  85 #define RNDIS_MSG_KEEPALIVE_C   (RNDIS_MSG_KEEPALIVE|RNDIS_MSG_COMPLETION)
  86
  87 /* codes for "status" field of completion messages */
  88 #define RNDIS_STATUS_SUCCESS            ccpu2(0x00000000)
  89 #define RNDIS_STATUS_FAILURE            ccpu2(0xc0000001)
  90 #define RNDIS_STATUS_INVALID_DATA       ccpu2(0xc0010015)
  91 #define RNDIS_STATUS_NOT_SUPPORTED      ccpu2(0xc00000bb)
  92 #define RNDIS_STATUS_MEDIA_CONNECT      ccpu2(0x4001000b)
  93 #define RNDIS_STATUS_MEDIA_DISCONNECT   ccpu2(0x4001000c)
  94
  95
  96 struct rndis_data_hdr {
  97         __le32  msg_type;               /* RNDIS_MSG_PACKET */
  98         __le32  msg_len;                // rndis_data_hdr + data_len + pad
  99         __le32  data_offset;            // 36 -- right after header
 100         __le32  data_len;               // ... real packet size
 101
 102         __le32  oob_data_offset;        // zero
 103         __le32  oob_data_len;           // zero
 104         __le32  num_oob;                // zero
 105         __le32  packet_data_offset;     // zero
 106
 107         __le32  packet_data_len;        // zero
 108         __le32  vc_handle;              // zero
 109         __le32  reserved;               // zero
 110 } __attribute__ ((packed));
 111
 112 struct rndis_init {             /* OUT */
 113         // header and:
 114         __le32  msg_type;                       /* RNDIS_MSG_INIT */
 115         __le32  msg_len;                        // 24
 116         __le32  request_id;
 117         __le32  major_version;                  // of rndis (1.0)
 118         __le32  minor_version;
 119         __le32  max_transfer_size;
 120 } __attribute__ ((packed));
 121
 122 struct rndis_init_c {           /* IN */
 123         // header and:
 124         __le32  msg_type;                       /* RNDIS_MSG_INIT_C */
 125         __le32  msg_len;
 126         __le32  request_id;
 127         __le32  status;
 128         __le32  major_version;                  // of rndis (1.0)
 129         __le32  minor_version;
 130         __le32  device_flags;
 131         __le32  medium;                         // zero == 802.3
 132         __le32  max_packets_per_message;
 133         __le32  max_transfer_size;
 134         __le32  packet_alignment;               // max 7; (1<<n) bytes
 135         __le32  af_list_offset;                 // zero
 136         __le32  af_list_size;                   // zero
 137 } __attribute__ ((packed));
 138
 139 struct rndis_halt {             /* OUT (no reply) */
 140         // header and:
 141         __le32  msg_type;                       /* RNDIS_MSG_HALT */
 142         __le32  msg_len;
 143         __le32  request_id;
 144 } __attribute__ ((packed));
 145
 146 struct rndis_query {            /* OUT */
 147         // header and:
 148         __le32  msg_type;                       /* RNDIS_MSG_QUERY */
 149         __le32  msg_len;
 150         __le32  request_id;
 151         __le32  oid;
 152         __le32  len;
 153         __le32  offset;
 154 /*?*/   __le32  handle;                         // zero
 155 } __attribute__ ((packed));
 156
 157 struct rndis_query_c {          /* IN */
 158         // header and:
 159         __le32  msg_type;                       /* RNDIS_MSG_QUERY_C */
 160         __le32  msg_len;
 161         __le32  request_id;
 162         __le32  status;
 163         __le32  len;
 164         __le32  offset;
 165 } __attribute__ ((packed));
 166
 167 struct rndis_set {              /* OUT */
 168         // header and:
 169         __le32  msg_type;                       /* RNDIS_MSG_SET */
 170         __le32  msg_len;
 171         __le32  request_id;
 172         __le32  oid;
 173         __le32  len;
 174         __le32  offset;
 175 /*?*/   __le32  handle;                         // zero
 176 } __attribute__ ((packed));
 177
 178 struct rndis_set_c {            /* IN */
 179         // header and:
 180         __le32  msg_type;                       /* RNDIS_MSG_SET_C */
 181         __le32  msg_len;
 182         __le32  request_id;
 183         __le32  status;
 184 } __attribute__ ((packed));
 185
 186 struct rndis_reset {            /* IN */
 187         // header and:
 188         __le32  msg_type;                       /* RNDIS_MSG_RESET */
 189         __le32  msg_len;
 190         __le32  reserved;
 191 } __attribute__ ((packed));
 192
 193 struct rndis_reset_c {          /* OUT */
 194         // header and:
 195         __le32  msg_type;                       /* RNDIS_MSG_RESET_C */
 196         __le32  msg_len;
 197         __le32  status;
 198         __le32  addressing_lost;
 199 } __attribute__ ((packed));
 200
 201 struct rndis_indicate {         /* IN (unrequested) */
 202         // header and:
 203         __le32  msg_type;                       /* RNDIS_MSG_INDICATE */
 204         __le32  msg_len;
 205         __le32  status;
 206         __le32  length;
 207         __le32  offset;
 208 /**/    __le32  diag_status;
 209         __le32  error_offset;
 210 /**/    __le32  message;
 211 } __attribute__ ((packed));
 212
 213 struct rndis_keepalive {        /* OUT (optionally IN) */
 214         // header and:
 215         __le32  msg_type;                       /* RNDIS_MSG_KEEPALIVE */
 216         __le32  msg_len;
 217         __le32  request_id;
 218 } __attribute__ ((packed));
 219
 220 struct rndis_keepalive_c {      /* IN (optionally OUT) */
 221         // header and:
 222         __le32  msg_type;                       /* RNDIS_MSG_KEEPALIVE_C */
 223         __le32  msg_len;
 224         __le32  request_id;
 225         __le32  status;
 226 } __attribute__ ((packed));
 227
 228 /* NOTE:  about 30 OIDs are "mandatory" for peripherals to support ... and
 229  * there are gobs more that may optionally be supported.  We'll avoid as much
 230  * of that mess as possible.
 231  */
 232 #define OID_802_3_PERMANENT_ADDRESS     ccpu2(0x01010101)
 233 #define OID_GEN_CURRENT_PACKET_FILTER   ccpu2(0x0001010e)
 234
 235 /*
 236  * RNDIS notifications from device: command completion; "reverse"
 237  * keepalives; etc
 238  */
 239 static void rndis_status(struct usbnet *dev, struct urb *urb)
 240 {
 241         devdbg(dev, "rndis status urb, len %d stat %d",
 242                 urb->actual_length, urb->status);
 243         // FIXME for keepalives, respond immediately (asynchronously)
 244         // if not an RNDIS status, do like cdc_status(dev,urb) does
 245 }
 246
 247 /*
 248  * RPC done RNDIS-style.  Caller guarantees:
 249  * - message is properly byteswapped
 250  * - there's no other request pending
 251  * - buf can hold up to 1KB response (required by RNDIS spec)
 252  * On return, the first few entries are already byteswapped.
 253  *
 254  * Call context is likely probe(), before interface name is known,
 255  * which is why we won't try to use it in the diagnostics.
 256  */
 257 static int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
 258 {
 259         struct cdc_state        *info = (void *) &dev->data;
 260         int                     retval;
 261         unsigned                count;
 262         __le32                  rsp;
 263         u32                     xid = 0, msg_len, request_id;
 264
 265         /* REVISIT when this gets called from contexts other than probe() or
 266          * disconnect(): either serialize, or dispatch responses on xid
 267          */
 268
 269         /* Issue the request; don't bother byteswapping our xid */
 270         if (likely(buf->msg_type != RNDIS_MSG_HALT
 271                         && buf->msg_type != RNDIS_MSG_RESET)) {
 272                 xid = dev->xid++;
 273                 if (!xid)
 274                         xid = dev->xid++;
 275                 buf->request_id = (__force __le32) xid;
 276         }
 277         retval = usb_control_msg(dev->udev,
 278                 usb_sndctrlpipe(dev->udev, 0),
 279                 USB_CDC_SEND_ENCAPSULATED_COMMAND,
 280                 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 281                 0, info->u->bMasterInterface0,
 282                 buf, le32_to_cpu(buf->msg_len),
 283                 RNDIS_CONTROL_TIMEOUT_MS);
 284         if (unlikely(retval < 0 || xid == 0))
 285                 return retval;
 286
 287         // FIXME Seems like some devices discard responses when
 288         // we time out and cancel our "get response" requests...
 289         // so, this is fragile.  Probably need to poll for status.
 290
 291         /* ignore status endpoint, just poll the control channel;
 292          * the request probably completed immediately
 293          */
 294         rsp = buf->msg_type | RNDIS_MSG_COMPLETION;
 295         for (count = 0; count < 10; count++) {
 296                 memset(buf, 0, 1024);
 297                 retval = usb_control_msg(dev->udev,
 298                         usb_rcvctrlpipe(dev->udev, 0),
 299                         USB_CDC_GET_ENCAPSULATED_RESPONSE,
 300                         USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 301                         0, info->u->bMasterInterface0,
 302                         buf, 1024,
 303                         RNDIS_CONTROL_TIMEOUT_MS);
 304                 if (likely(retval >= 8)) {
 305                         msg_len = le32_to_cpu(buf->msg_len);
 306                         request_id = (__force u32) buf->request_id;
 307                         if (likely(buf->msg_type == rsp)) {
 308                                 if (likely(request_id == xid)) {
 309                                         if (unlikely(rsp == RNDIS_MSG_RESET_C))
 310                                                 return 0;
 311                                         if (likely(RNDIS_STATUS_SUCCESS
 312                                                         == buf->status))
 313                                                 return 0;
 314                                         dev_dbg(&info->control->dev,
 315                                                 "rndis reply status %08x\n",
 316                                                 le32_to_cpu(buf->status));
 317                                         return -EL3RST;
 318                                 }
 319                                 dev_dbg(&info->control->dev,
 320                                         "rndis reply id %d expected %d\n",
 321                                         request_id, xid);
 322                                 /* then likely retry */
 323                         } else switch (buf->msg_type) {
 324                         case RNDIS_MSG_INDICATE: {      /* fault */
 325                                 // struct rndis_indicate *msg = (void *)buf;
 326                                 dev_info(&info->control->dev,
 327                                          "rndis fault indication\n");
 328                                 }
 329                                 break;
 330                         case RNDIS_MSG_KEEPALIVE: {     /* ping */
 331                                 struct rndis_keepalive_c *msg = (void *)buf;
 332
 333                                 msg->msg_type = RNDIS_MSG_KEEPALIVE_C;
 334                                 msg->msg_len = ccpu2(sizeof *msg);
 335                                 msg->status = RNDIS_STATUS_SUCCESS;
 336                                 retval = usb_control_msg(dev->udev,
 337                                         usb_sndctrlpipe(dev->udev, 0),
 338                                         USB_CDC_SEND_ENCAPSULATED_COMMAND,
 339                                         USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 340                                         0, info->u->bMasterInterface0,
 341                                         msg, sizeof *msg,
 342                                         RNDIS_CONTROL_TIMEOUT_MS);
 343                                 if (unlikely(retval < 0))
 344                                         dev_dbg(&info->control->dev,
 345                                                 "rndis keepalive err %d\n",
 346                                                 retval);
 347                                 }
 348                                 break;
 349                         default:
 350                                 dev_dbg(&info->control->dev,
 351                                         "unexpected rndis msg %08x len %d\n",
 352                                         le32_to_cpu(buf->msg_type), msg_len);
 353                         }
 354                 } else {
 355                         /* device probably issued a protocol stall; ignore */
 356                         dev_dbg(&info->control->dev,
 357                                 "rndis response error, code %d\n", retval);
 358                 }
 359                 msleep(2);
 360         }
 361         dev_dbg(&info->control->dev, "rndis response timeout\n");
 362         return -ETIMEDOUT;
 363 }
 364
 365 static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
 366 {
 367         int                     retval;
 368         struct net_device       *net = dev->net;
 369         union {
 370                 void                    *buf;
 371                 struct rndis_msg_hdr    *header;
 372                 struct rndis_init       *init;
 373                 struct rndis_init_c     *init_c;
 374                 struct rndis_query      *get;
 375                 struct rndis_query_c    *get_c;
 376                 struct rndis_set        *set;
 377                 struct rndis_set_c      *set_c;
 378         } u;
 379         u32                     tmp;
 380
 381         /* we can't rely on i/o from stack working, or stack allocation */
 382         u.buf = kmalloc(1024, GFP_KERNEL);
 383         if (!u.buf)
 384                 return -ENOMEM;
 385         retval = usbnet_generic_cdc_bind(dev, intf);
 386         if (retval < 0)
 387                 goto done;
 388
 389         net->hard_header_len += sizeof (struct rndis_data_hdr);
 390
 391         /* initialize; max transfer is 16KB at full speed */
 392         u.init->msg_type = RNDIS_MSG_INIT;
 393         u.init->msg_len = ccpu2(sizeof *u.init);
 394         u.init->major_version = ccpu2(1);
 395         u.init->minor_version = ccpu2(0);
 396         u.init->max_transfer_size = ccpu2(net->mtu + net->hard_header_len);
 397
 398         retval = rndis_command(dev, u.header);
 399         if (unlikely(retval < 0)) {
 400                 /* it might not even be an RNDIS device!! */
 401                 dev_err(&intf->dev, "RNDIS init failed, %d\n", retval);
 402 fail:
 403                 usb_driver_release_interface(driver_of(intf),
 404                         ((struct cdc_state *)&(dev->data))->data);
 405                 goto done;
 406         }
 407         dev->hard_mtu = le32_to_cpu(u.init_c->max_transfer_size);
 408         /* REVISIT:  peripheral "alignment" request is ignored ... */
 409         dev_dbg(&intf->dev, "hard mtu %u, align %d\n", dev->hard_mtu,
 410                 1 << le32_to_cpu(u.init_c->packet_alignment));
 411
 412         /* get designated host ethernet address */
 413         memset(u.get, 0, sizeof *u.get);
 414         u.get->msg_type = RNDIS_MSG_QUERY;
 415         u.get->msg_len = ccpu2(sizeof *u.get);
 416         u.get->oid = OID_802_3_PERMANENT_ADDRESS;
 417
 418         retval = rndis_command(dev, u.header);
 419         if (unlikely(retval < 0)) {
 420                 dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval);
 421                 goto fail;
 422         }
 423         tmp = le32_to_cpu(u.get_c->offset);
 424         if (unlikely((tmp + 8) > (1024 - ETH_ALEN)
 425                         || u.get_c->len != ccpu2(ETH_ALEN))) {
 426                 dev_err(&intf->dev, "rndis ethaddr off %d len %d ?\n",
 427                         tmp, le32_to_cpu(u.get_c->len));
 428                 retval = -EDOM;
 429                 goto fail;
 430         }
 431         memcpy(net->dev_addr, tmp + (char *)&u.get_c->request_id, ETH_ALEN);
 432
 433         /* set a nonzero filter to enable data transfers */
 434         memset(u.set, 0, sizeof *u.set);
 435         u.set->msg_type = RNDIS_MSG_SET;
 436         u.set->msg_len = ccpu2(4 + sizeof *u.set);
 437         u.set->oid = OID_GEN_CURRENT_PACKET_FILTER;
 438         u.set->len = ccpu2(4);
 439         u.set->offset = ccpu2((sizeof *u.set) - 8);
 440         *(__le32 *)(u.buf + sizeof *u.set) = ccpu2(DEFAULT_FILTER);
 441
 442         retval = rndis_command(dev, u.header);
 443         if (unlikely(retval < 0)) {
 444                 dev_err(&intf->dev, "rndis set packet filter, %d\n", retval);
 445                 goto fail;
 446         }
 447
 448         retval = 0;
 449 done:
 450         kfree(u.buf);
 451         return retval;
 452 }
 453
 454 static void rndis_unbind(struct usbnet *dev, struct usb_interface *intf)
 455 {
 456         struct rndis_halt       *halt;
 457
 458         /* try to clear any rndis state/activity (no i/o from stack!) */
 459         halt = kcalloc(1, sizeof *halt, SLAB_KERNEL);
 460         if (halt) {
 461                 halt->msg_type = RNDIS_MSG_HALT;
 462                 halt->msg_len = ccpu2(sizeof *halt);
 463                 (void) rndis_command(dev, (void *)halt);
 464                 kfree(halt);
 465         }
 466
 467         return usbnet_cdc_unbind(dev, intf);
 468 }
 469
 470 /*
 471  * DATA -- host must not write zlps
 472  */
 473 static int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 474 {
 475         /* peripheral may have batched packets to us... */
 476         while (likely(skb->len)) {
 477                 struct rndis_data_hdr   *hdr = (void *)skb->data;
 478                 struct sk_buff          *skb2;
 479                 u32                     msg_len, data_offset, data_len;
 480
 481                 msg_len = le32_to_cpu(hdr->msg_len);
 482                 data_offset = le32_to_cpu(hdr->data_offset);
 483                 data_len = le32_to_cpu(hdr->data_len);
 484
 485                 /* don't choke if we see oob, per-packet data, etc */
 486                 if (unlikely(hdr->msg_type != RNDIS_MSG_PACKET
 487                                 || skb->len < msg_len
 488                                 || (data_offset + data_len + 8) > msg_len)) {
 489                         dev->stats.rx_frame_errors++;
 490                         devdbg(dev, "bad rndis message %d/%d/%d/%d, len %d",
 491                                 le32_to_cpu(hdr->msg_type),
 492                                 msg_len, data_offset, data_len, skb->len);
 493                         return 0;
 494                 }
 495                 skb_pull(skb, 8 + data_offset);
 496
 497                 /* at most one packet left? */
 498                 if (likely((data_len - skb->len) <= sizeof *hdr)) {
 499                         skb_trim(skb, data_len);
 500                         break;
 501                 }
 502
 503                 /* try to return all the packets in the batch */
 504                 skb2 = skb_clone(skb, GFP_ATOMIC);
 505                 if (unlikely(!skb2))
 506                         break;
 507                 skb_pull(skb, msg_len - sizeof *hdr);
 508                 skb_trim(skb2, data_len);
 509                 usbnet_skb_return(dev, skb2);
 510         }
 511
 512         /* caller will usbnet_skb_return the remaining packet */
 513         return 1;
 514 }
 515
 516 static struct sk_buff *
 517 rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
 518 {
 519         struct rndis_data_hdr   *hdr;
 520         struct sk_buff          *skb2;
 521         unsigned                len = skb->len;
 522
 523         if (likely(!skb_cloned(skb))) {
 524                 int     room = skb_headroom(skb);
 525
 526                 /* enough head room as-is? */
 527                 if (unlikely((sizeof *hdr) <= room))
 528                         goto fill;
 529
 530                 /* enough room, but needs to be readjusted? */
 531                 room += skb_tailroom(skb);
 532                 if (likely((sizeof *hdr) <= room)) {
 533                         skb->data = memmove(skb->head + sizeof *hdr,
 534                                             skb->data, len);
 535                         skb->tail = skb->data + len;
 536                         goto fill;
 537                 }
 538         }
 539
 540         /* create a new skb, with the correct size (and tailpad) */
 541         skb2 = skb_copy_expand(skb, sizeof *hdr, 1, flags);
 542         dev_kfree_skb_any(skb);
 543         if (unlikely(!skb2))
 544                 return skb2;
 545         skb = skb2;
 546
 547         /* fill out the RNDIS header.  we won't bother trying to batch
 548          * packets; Linux minimizes wasted bandwidth through tx queues.
 549          */
 550 fill:
 551         hdr = (void *) __skb_push(skb, sizeof *hdr);
 552         memset(hdr, 0, sizeof *hdr);
 553         hdr->msg_type = RNDIS_MSG_PACKET;
 554         hdr->msg_len = cpu_to_le32(skb->len);
 555         hdr->data_offset = ccpu2(sizeof(*hdr) - 8);
 556         hdr->data_len = cpu_to_le32(len);
 557
 558         /* FIXME make the last packet always be short ... */
 559         return skb;
 560 }
 561
 562
 563 static const struct driver_info rndis_info = {
 564         .description =  "RNDIS device",
 565         .flags =        FLAG_ETHER | FLAG_FRAMING_RN,
 566         .bind =         rndis_bind,
 567         .unbind =       rndis_unbind,
 568         .status =       rndis_status,
 569         .rx_fixup =     rndis_rx_fixup,
 570         .tx_fixup =     rndis_tx_fixup,
 571 };
 572
 573 #undef ccpu2
 574
 575
 576 /*-------------------------------------------------------------------------*/
 577
 578 static const struct usb_device_id       products [] = {
 579 {
 580         /* RNDIS is MSFT's un-official variant of CDC ACM */
 581         USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
 582         .driver_info = (unsigned long) &rndis_info,
 583 },
 584         { },            // END
 585 };
 586 MODULE_DEVICE_TABLE(usb, products);
 587
 588 static struct usb_driver rndis_driver = {
 589         .owner =        THIS_MODULE,
 590         .name =         "rndis_host",
 591         .id_table =     products,
 592         .probe =        usbnet_probe,
 593         .disconnect =   usbnet_disconnect,
 594         .suspend =      usbnet_suspend,
 595         .resume =       usbnet_resume,
 596 };
 597
 598 static int __init rndis_init(void)
 599 {
 600         return usb_register(&rndis_driver);
 601 }
 602 module_init(rndis_init);
 603
 604 static void __exit rndis_exit(void)
 605 {
 606         usb_deregister(&rndis_driver);
 607 }
 608 module_exit(rndis_exit);
 609
 610 MODULE_AUTHOR("David Brownell");
 611 MODULE_DESCRIPTION("USB Host side RNDIS driver");
 612 MODULE_LICENSE("GPL");