1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Host Side support for RNDIS Networking Links 4 * Copyright (C) 2005 by David Brownell 5 */ 6 #include <linux/module.h> 7 #include <linux/netdevice.h> 8 #include <linux/etherdevice.h> 9 #include <linux/ethtool.h> 10 #include <linux/workqueue.h> 11 #include <linux/slab.h> 12 #include <linux/mii.h> 13 #include <linux/usb.h> 14 #include <linux/usb/cdc.h> 15 #include <linux/usb/usbnet.h> 16 #include <linux/usb/rndis_host.h> 17 #include <linux/overflow.h> 18 19 20 /* 21 * RNDIS is NDIS remoted over USB. It's a MSFT variant of CDC ACM ... of 22 * course ACM was intended for modems, not Ethernet links! USB's standard 23 * for Ethernet links is "CDC Ethernet", which is significantly simpler. 24 * 25 * NOTE that Microsoft's "RNDIS 1.0" specification is incomplete. Issues 26 * include: 27 * - Power management in particular relies on information that's scattered 28 * through other documentation, and which is incomplete or incorrect even 29 * there. 30 * - There are various undocumented protocol requirements, such as the 31 * need to send unused garbage in control-OUT messages. 32 * - In some cases, MS-Windows will emit undocumented requests; this 33 * matters more to peripheral implementations than host ones. 34 * 35 * Moreover there's a no-open-specs variant of RNDIS called "ActiveSync". 36 * 37 * For these reasons and others, ** USE OF RNDIS IS STRONGLY DISCOURAGED ** in 38 * favor of such non-proprietary alternatives as CDC Ethernet or the newer (and 39 * currently rare) "Ethernet Emulation Model" (EEM). 40 */ 41 42 /* 43 * RNDIS notifications from device: command completion; "reverse" 44 * keepalives; etc 45 */ 46 void rndis_status(struct usbnet *dev, struct urb *urb) 47 { 48 netdev_dbg(dev->net, "rndis status urb, len %d stat %d\n", 49 urb->actual_length, urb->status); 50 // FIXME for keepalives, respond immediately (asynchronously) 51 // if not an RNDIS status, do like cdc_status(dev,urb) does 52 } 53 EXPORT_SYMBOL_GPL(rndis_status); 54 55 /* 56 * RNDIS indicate messages. 57 */ 58 static void rndis_msg_indicate(struct usbnet *dev, struct rndis_indicate *msg, 59 int buflen) 60 { 61 struct cdc_state *info = (void *)&dev->data; 62 struct device *udev = &info->control->dev; 63 64 if (dev->driver_info->indication) { 65 dev->driver_info->indication(dev, msg, buflen); 66 } else { 67 u32 status = le32_to_cpu(msg->status); 68 69 switch (status) { 70 case RNDIS_STATUS_MEDIA_CONNECT: 71 dev_info(udev, "rndis media connect\n"); 72 break; 73 case RNDIS_STATUS_MEDIA_DISCONNECT: 74 dev_info(udev, "rndis media disconnect\n"); 75 break; 76 default: 77 dev_info(udev, "rndis indication: 0x%08x\n", status); 78 } 79 } 80 } 81 82 /* 83 * RPC done RNDIS-style. Caller guarantees: 84 * - message is properly byteswapped 85 * - there's no other request pending 86 * - buf can hold up to 1KB response (required by RNDIS spec) 87 * On return, the first few entries are already byteswapped. 88 * 89 * Call context is likely probe(), before interface name is known, 90 * which is why we won't try to use it in the diagnostics. 91 */ 92 int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen) 93 { 94 struct cdc_state *info = (void *) &dev->data; 95 struct usb_cdc_notification notification; 96 int master_ifnum; 97 int retval; 98 int partial; 99 unsigned count; 100 u32 xid = 0, msg_len, request_id, msg_type, rsp, 101 status; 102 103 /* REVISIT when this gets called from contexts other than probe() or 104 * disconnect(): either serialize, or dispatch responses on xid 105 */ 106 107 msg_type = le32_to_cpu(buf->msg_type); 108 109 /* Issue the request; xid is unique, don't bother byteswapping it */ 110 if (likely(msg_type != RNDIS_MSG_HALT && msg_type != RNDIS_MSG_RESET)) { 111 xid = dev->xid++; 112 if (!xid) 113 xid = dev->xid++; 114 buf->request_id = (__force __le32) xid; 115 } 116 master_ifnum = info->control->cur_altsetting->desc.bInterfaceNumber; 117 retval = usb_control_msg(dev->udev, 118 usb_sndctrlpipe(dev->udev, 0), 119 USB_CDC_SEND_ENCAPSULATED_COMMAND, 120 USB_TYPE_CLASS | USB_RECIP_INTERFACE, 121 0, master_ifnum, 122 buf, le32_to_cpu(buf->msg_len), 123 RNDIS_CONTROL_TIMEOUT_MS); 124 if (unlikely(retval < 0 || xid == 0)) 125 return retval; 126 127 /* Some devices don't respond on the control channel until 128 * polled on the status channel, so do that first. */ 129 if (dev->driver_info->data & RNDIS_DRIVER_DATA_POLL_STATUS) { 130 retval = usb_interrupt_msg( 131 dev->udev, 132 usb_rcvintpipe(dev->udev, 133 dev->status->desc.bEndpointAddress), 134 ¬ification, sizeof(notification), &partial, 135 RNDIS_CONTROL_TIMEOUT_MS); 136 if (unlikely(retval < 0)) 137 return retval; 138 } 139 140 /* Poll the control channel; the request probably completed immediately */ 141 rsp = le32_to_cpu(buf->msg_type) | RNDIS_MSG_COMPLETION; 142 for (count = 0; count < 10; count++) { 143 memset(buf, 0, CONTROL_BUFFER_SIZE); 144 retval = usb_control_msg(dev->udev, 145 usb_rcvctrlpipe(dev->udev, 0), 146 USB_CDC_GET_ENCAPSULATED_RESPONSE, 147 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 148 0, master_ifnum, 149 buf, buflen, 150 RNDIS_CONTROL_TIMEOUT_MS); 151 if (likely(retval >= 8)) { 152 msg_type = le32_to_cpu(buf->msg_type); 153 msg_len = le32_to_cpu(buf->msg_len); 154 status = le32_to_cpu(buf->status); 155 request_id = (__force u32) buf->request_id; 156 if (likely(msg_type == rsp)) { 157 if (likely(request_id == xid)) { 158 if (unlikely(rsp == RNDIS_MSG_RESET_C)) 159 return 0; 160 if (likely(RNDIS_STATUS_SUCCESS == 161 status)) 162 return 0; 163 dev_dbg(&info->control->dev, 164 "rndis reply status %08x\n", 165 status); 166 return -EL3RST; 167 } 168 dev_dbg(&info->control->dev, 169 "rndis reply id %d expected %d\n", 170 request_id, xid); 171 /* then likely retry */ 172 } else switch (msg_type) { 173 case RNDIS_MSG_INDICATE: /* fault/event */ 174 rndis_msg_indicate(dev, (void *)buf, buflen); 175 break; 176 case RNDIS_MSG_KEEPALIVE: { /* ping */ 177 struct rndis_keepalive_c *msg = (void *)buf; 178 179 msg->msg_type = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C); 180 msg->msg_len = cpu_to_le32(sizeof *msg); 181 msg->status = cpu_to_le32(RNDIS_STATUS_SUCCESS); 182 retval = usb_control_msg(dev->udev, 183 usb_sndctrlpipe(dev->udev, 0), 184 USB_CDC_SEND_ENCAPSULATED_COMMAND, 185 USB_TYPE_CLASS | USB_RECIP_INTERFACE, 186 0, master_ifnum, 187 msg, sizeof *msg, 188 RNDIS_CONTROL_TIMEOUT_MS); 189 if (unlikely(retval < 0)) 190 dev_dbg(&info->control->dev, 191 "rndis keepalive err %d\n", 192 retval); 193 } 194 break; 195 default: 196 dev_dbg(&info->control->dev, 197 "unexpected rndis msg %08x len %d\n", 198 le32_to_cpu(buf->msg_type), msg_len); 199 } 200 } else { 201 /* device probably issued a protocol stall; ignore */ 202 dev_dbg(&info->control->dev, 203 "rndis response error, code %d\n", retval); 204 } 205 msleep(40); 206 } 207 dev_dbg(&info->control->dev, "rndis response timeout\n"); 208 return -ETIMEDOUT; 209 } 210 EXPORT_SYMBOL_GPL(rndis_command); 211 212 /* 213 * rndis_query: 214 * 215 * Performs a query for @oid along with 0 or more bytes of payload as 216 * specified by @in_len. If @reply_len is not set to -1 then the reply 217 * length is checked against this value, resulting in an error if it 218 * doesn't match. 219 * 220 * NOTE: Adding a payload exactly or greater than the size of the expected 221 * response payload is an evident requirement MSFT added for ActiveSync. 222 * 223 * The only exception is for OIDs that return a variably sized response, 224 * in which case no payload should be added. This undocumented (and 225 * nonsensical!) issue was found by sniffing protocol requests from the 226 * ActiveSync 4.1 Windows driver. 227 */ 228 static int rndis_query(struct usbnet *dev, struct usb_interface *intf, 229 void *buf, u32 oid, u32 in_len, 230 void **reply, int *reply_len) 231 { 232 int retval; 233 union { 234 void *buf; 235 struct rndis_msg_hdr *header; 236 struct rndis_query *get; 237 struct rndis_query_c *get_c; 238 } u; 239 u32 off, len; 240 241 u.buf = buf; 242 243 memset(u.get, 0, sizeof *u.get + in_len); 244 u.get->msg_type = cpu_to_le32(RNDIS_MSG_QUERY); 245 u.get->msg_len = cpu_to_le32(sizeof *u.get + in_len); 246 u.get->oid = cpu_to_le32(oid); 247 u.get->len = cpu_to_le32(in_len); 248 u.get->offset = cpu_to_le32(20); 249 250 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); 251 if (unlikely(retval < 0)) { 252 dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) failed, %d\n", 253 oid, retval); 254 return retval; 255 } 256 257 off = le32_to_cpu(u.get_c->offset); 258 len = le32_to_cpu(u.get_c->len); 259 if (unlikely((off > CONTROL_BUFFER_SIZE - 8) || 260 (len > CONTROL_BUFFER_SIZE - 8 - off))) 261 goto response_error; 262 263 if (*reply_len != -1 && len != *reply_len) 264 goto response_error; 265 266 *reply = (unsigned char *) &u.get_c->request_id + off; 267 *reply_len = len; 268 269 return retval; 270 271 response_error: 272 dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) " 273 "invalid response - off %d len %d\n", 274 oid, off, len); 275 return -EDOM; 276 } 277 278 /* same as usbnet_netdev_ops but MTU change not allowed */ 279 static const struct net_device_ops rndis_netdev_ops = { 280 .ndo_open = usbnet_open, 281 .ndo_stop = usbnet_stop, 282 .ndo_start_xmit = usbnet_start_xmit, 283 .ndo_tx_timeout = usbnet_tx_timeout, 284 .ndo_get_stats64 = dev_get_tstats64, 285 .ndo_set_mac_address = eth_mac_addr, 286 .ndo_validate_addr = eth_validate_addr, 287 }; 288 289 int 290 generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags) 291 { 292 int retval; 293 struct net_device *net = dev->net; 294 struct cdc_state *info = (void *) &dev->data; 295 union { 296 void *buf; 297 struct rndis_msg_hdr *header; 298 struct rndis_init *init; 299 struct rndis_init_c *init_c; 300 struct rndis_query *get; 301 struct rndis_query_c *get_c; 302 struct rndis_set *set; 303 struct rndis_set_c *set_c; 304 struct rndis_halt *halt; 305 } u; 306 u32 tmp; 307 __le32 phym_unspec, *phym; 308 int reply_len; 309 unsigned char *bp; 310 311 /* we can't rely on i/o from stack working, or stack allocation */ 312 u.buf = kmalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL); 313 if (!u.buf) 314 return -ENOMEM; 315 retval = usbnet_generic_cdc_bind(dev, intf); 316 if (retval < 0) 317 goto fail; 318 319 u.init->msg_type = cpu_to_le32(RNDIS_MSG_INIT); 320 u.init->msg_len = cpu_to_le32(sizeof *u.init); 321 u.init->major_version = cpu_to_le32(1); 322 u.init->minor_version = cpu_to_le32(0); 323 324 /* max transfer (in spec) is 0x4000 at full speed, but for 325 * TX we'll stick to one Ethernet packet plus RNDIS framing. 326 * For RX we handle drivers that zero-pad to end-of-packet. 327 * Don't let userspace change these settings. 328 * 329 * NOTE: there still seems to be weirdness here, as if we need 330 * to do some more things to make sure WinCE targets accept this. 331 * They default to jumbograms of 8KB or 16KB, which is absurd 332 * for such low data rates and which is also more than Linux 333 * can usually expect to allocate for SKB data... 334 */ 335 net->hard_header_len += sizeof (struct rndis_data_hdr); 336 dev->hard_mtu = net->mtu + net->hard_header_len; 337 338 dev->maxpacket = usb_maxpacket(dev->udev, dev->out); 339 if (dev->maxpacket == 0) { 340 netif_dbg(dev, probe, dev->net, 341 "dev->maxpacket can't be 0\n"); 342 retval = -EINVAL; 343 goto fail_and_release; 344 } 345 346 dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1); 347 dev->rx_urb_size &= ~(dev->maxpacket - 1); 348 u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size); 349 350 net->netdev_ops = &rndis_netdev_ops; 351 352 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); 353 if (unlikely(retval < 0)) { 354 /* it might not even be an RNDIS device!! */ 355 dev_err(&intf->dev, "RNDIS init failed, %d\n", retval); 356 goto fail_and_release; 357 } 358 tmp = le32_to_cpu(u.init_c->max_transfer_size); 359 if (tmp < dev->hard_mtu) { 360 if (tmp <= net->hard_header_len) { 361 dev_err(&intf->dev, 362 "dev can't take %u byte packets (max %u)\n", 363 dev->hard_mtu, tmp); 364 retval = -EINVAL; 365 goto halt_fail_and_release; 366 } 367 dev_warn(&intf->dev, 368 "dev can't take %u byte packets (max %u), " 369 "adjusting MTU to %u\n", 370 dev->hard_mtu, tmp, tmp - net->hard_header_len); 371 dev->hard_mtu = tmp; 372 net->mtu = dev->hard_mtu - net->hard_header_len; 373 } 374 375 /* REVISIT: peripheral "alignment" request is ignored ... */ 376 dev_dbg(&intf->dev, 377 "hard mtu %u (%u from dev), rx buflen %zu, align %d\n", 378 dev->hard_mtu, tmp, dev->rx_urb_size, 379 1 << le32_to_cpu(u.init_c->packet_alignment)); 380 381 /* module has some device initialization code needs to be done right 382 * after RNDIS_INIT */ 383 if (dev->driver_info->early_init && 384 dev->driver_info->early_init(dev) != 0) 385 goto halt_fail_and_release; 386 387 /* Check physical medium */ 388 phym = NULL; 389 reply_len = sizeof *phym; 390 retval = rndis_query(dev, intf, u.buf, 391 RNDIS_OID_GEN_PHYSICAL_MEDIUM, 392 reply_len, (void **)&phym, &reply_len); 393 if (retval != 0 || !phym) { 394 /* OID is optional so don't fail here. */ 395 phym_unspec = cpu_to_le32(RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED); 396 phym = &phym_unspec; 397 } 398 if ((flags & FLAG_RNDIS_PHYM_WIRELESS) && 399 le32_to_cpup(phym) != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) { 400 netif_dbg(dev, probe, dev->net, 401 "driver requires wireless physical medium, but device is not\n"); 402 retval = -ENODEV; 403 goto halt_fail_and_release; 404 } 405 if ((flags & FLAG_RNDIS_PHYM_NOT_WIRELESS) && 406 le32_to_cpup(phym) == RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) { 407 netif_dbg(dev, probe, dev->net, 408 "driver requires non-wireless physical medium, but device is wireless.\n"); 409 retval = -ENODEV; 410 goto halt_fail_and_release; 411 } 412 413 /* Get designated host ethernet address */ 414 reply_len = ETH_ALEN; 415 retval = rndis_query(dev, intf, u.buf, 416 RNDIS_OID_802_3_PERMANENT_ADDRESS, 417 48, (void **) &bp, &reply_len); 418 if (unlikely(retval< 0)) { 419 dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval); 420 goto halt_fail_and_release; 421 } 422 423 eth_hw_addr_set(net, bp); 424 425 /* set a nonzero filter to enable data transfers */ 426 memset(u.set, 0, sizeof *u.set); 427 u.set->msg_type = cpu_to_le32(RNDIS_MSG_SET); 428 u.set->msg_len = cpu_to_le32(4 + sizeof *u.set); 429 u.set->oid = cpu_to_le32(RNDIS_OID_GEN_CURRENT_PACKET_FILTER); 430 u.set->len = cpu_to_le32(4); 431 u.set->offset = cpu_to_le32((sizeof *u.set) - 8); 432 *(__le32 *)(u.buf + sizeof *u.set) = cpu_to_le32(RNDIS_DEFAULT_FILTER); 433 434 retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); 435 if (unlikely(retval < 0)) { 436 dev_err(&intf->dev, "rndis set packet filter, %d\n", retval); 437 goto halt_fail_and_release; 438 } 439 440 retval = 0; 441 442 kfree(u.buf); 443 return retval; 444 445 halt_fail_and_release: 446 memset(u.halt, 0, sizeof *u.halt); 447 u.halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT); 448 u.halt->msg_len = cpu_to_le32(sizeof *u.halt); 449 (void) rndis_command(dev, (void *)u.halt, CONTROL_BUFFER_SIZE); 450 fail_and_release: 451 usb_set_intfdata(info->data, NULL); 452 usb_driver_release_interface(driver_of(intf), info->data); 453 info->data = NULL; 454 fail: 455 kfree(u.buf); 456 return retval; 457 } 458 EXPORT_SYMBOL_GPL(generic_rndis_bind); 459 460 static int rndis_bind(struct usbnet *dev, struct usb_interface *intf) 461 { 462 return generic_rndis_bind(dev, intf, FLAG_RNDIS_PHYM_NOT_WIRELESS); 463 } 464 465 static int zte_rndis_bind(struct usbnet *dev, struct usb_interface *intf) 466 { 467 int status = rndis_bind(dev, intf); 468 469 if (!status && (dev->net->dev_addr[0] & 0x02)) 470 eth_hw_addr_random(dev->net); 471 472 return status; 473 } 474 475 void rndis_unbind(struct usbnet *dev, struct usb_interface *intf) 476 { 477 struct rndis_halt *halt; 478 479 /* try to clear any rndis state/activity (no i/o from stack!) */ 480 halt = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL); 481 if (halt) { 482 halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT); 483 halt->msg_len = cpu_to_le32(sizeof *halt); 484 (void) rndis_command(dev, (void *)halt, CONTROL_BUFFER_SIZE); 485 kfree(halt); 486 } 487 488 usbnet_cdc_unbind(dev, intf); 489 } 490 EXPORT_SYMBOL_GPL(rndis_unbind); 491 492 /* 493 * DATA -- host must not write zlps 494 */ 495 int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 496 { 497 bool dst_mac_fixup; 498 499 /* This check is no longer done by usbnet */ 500 if (skb->len < dev->net->hard_header_len) 501 return 0; 502 503 dst_mac_fixup = !!(dev->driver_info->data & RNDIS_DRIVER_DATA_DST_MAC_FIXUP); 504 505 /* peripheral may have batched packets to us... */ 506 while (likely(skb->len)) { 507 struct rndis_data_hdr *hdr = (void *)skb->data; 508 struct sk_buff *skb2; 509 u32 msg_type, msg_len, data_offset, data_len; 510 u32 overflow_check; 511 512 msg_type = le32_to_cpu(hdr->msg_type); 513 msg_len = le32_to_cpu(hdr->msg_len); 514 data_offset = le32_to_cpu(hdr->data_offset); 515 data_len = le32_to_cpu(hdr->data_len); 516 517 /* don't choke if we see oob, per-packet data, etc */ 518 if (unlikely(msg_type != RNDIS_MSG_PACKET || skb->len < msg_len 519 || (data_offset + data_len + 8) > msg_len 520 || check_add_overflow(data_offset, data_len, &overflow_check) 521 || check_add_overflow(overflow_check, 8, &overflow_check))) { 522 dev->net->stats.rx_frame_errors++; 523 netdev_dbg(dev->net, "bad rndis message %d/%d/%d/%d, len %d\n", 524 le32_to_cpu(hdr->msg_type), 525 msg_len, data_offset, data_len, skb->len); 526 return 0; 527 } 528 skb_pull(skb, 8 + data_offset); 529 530 /* at most one packet left? */ 531 if (likely((data_len - skb->len) <= sizeof *hdr)) { 532 skb_trim(skb, data_len); 533 break; 534 } 535 536 /* try to return all the packets in the batch */ 537 skb2 = skb_clone(skb, GFP_ATOMIC); 538 if (unlikely(!skb2)) 539 break; 540 skb_pull(skb, msg_len - sizeof *hdr); 541 skb_trim(skb2, data_len); 542 543 if (unlikely(dst_mac_fixup)) 544 usbnet_cdc_zte_rx_fixup(dev, skb2); 545 546 usbnet_skb_return(dev, skb2); 547 } 548 549 /* caller will usbnet_skb_return the remaining packet */ 550 if (unlikely(dst_mac_fixup)) 551 usbnet_cdc_zte_rx_fixup(dev, skb); 552 553 return 1; 554 } 555 EXPORT_SYMBOL_GPL(rndis_rx_fixup); 556 557 struct sk_buff * 558 rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 559 { 560 struct rndis_data_hdr *hdr; 561 struct sk_buff *skb2; 562 unsigned len = skb->len; 563 564 if (likely(!skb_cloned(skb))) { 565 int room = skb_headroom(skb); 566 567 /* enough head room as-is? */ 568 if (unlikely((sizeof *hdr) <= room)) 569 goto fill; 570 571 /* enough room, but needs to be readjusted? */ 572 room += skb_tailroom(skb); 573 if (likely((sizeof *hdr) <= room)) { 574 skb->data = memmove(skb->head + sizeof *hdr, 575 skb->data, len); 576 skb_set_tail_pointer(skb, len); 577 goto fill; 578 } 579 } 580 581 /* create a new skb, with the correct size (and tailpad) */ 582 skb2 = skb_copy_expand(skb, sizeof *hdr, 1, flags); 583 dev_kfree_skb_any(skb); 584 if (unlikely(!skb2)) 585 return skb2; 586 skb = skb2; 587 588 /* fill out the RNDIS header. we won't bother trying to batch 589 * packets; Linux minimizes wasted bandwidth through tx queues. 590 */ 591 fill: 592 hdr = __skb_push(skb, sizeof *hdr); 593 memset(hdr, 0, sizeof *hdr); 594 hdr->msg_type = cpu_to_le32(RNDIS_MSG_PACKET); 595 hdr->msg_len = cpu_to_le32(skb->len); 596 hdr->data_offset = cpu_to_le32(sizeof(*hdr) - 8); 597 hdr->data_len = cpu_to_le32(len); 598 599 /* FIXME make the last packet always be short ... */ 600 return skb; 601 } 602 EXPORT_SYMBOL_GPL(rndis_tx_fixup); 603 604 605 static const struct driver_info rndis_info = { 606 .description = "RNDIS device", 607 .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, 608 .bind = rndis_bind, 609 .unbind = rndis_unbind, 610 .status = rndis_status, 611 .rx_fixup = rndis_rx_fixup, 612 .tx_fixup = rndis_tx_fixup, 613 }; 614 615 static const struct driver_info rndis_poll_status_info = { 616 .description = "RNDIS device (poll status before control)", 617 .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, 618 .data = RNDIS_DRIVER_DATA_POLL_STATUS, 619 .bind = rndis_bind, 620 .unbind = rndis_unbind, 621 .status = rndis_status, 622 .rx_fixup = rndis_rx_fixup, 623 .tx_fixup = rndis_tx_fixup, 624 }; 625 626 static const struct driver_info zte_rndis_info = { 627 .description = "ZTE RNDIS device", 628 .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, 629 .data = RNDIS_DRIVER_DATA_DST_MAC_FIXUP, 630 .bind = zte_rndis_bind, 631 .unbind = rndis_unbind, 632 .status = rndis_status, 633 .rx_fixup = rndis_rx_fixup, 634 .tx_fixup = rndis_tx_fixup, 635 }; 636 637 static const struct driver_info rndis_info_lowpower = { 638 .description = "RNDIS device", 639 .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, 640 .bind = rndis_bind, 641 .unbind = rndis_unbind, 642 .status = rndis_status, 643 .rx_fixup = rndis_rx_fixup, 644 .tx_fixup = rndis_tx_fixup, 645 .manage_power = usbnet_manage_power, 646 }; 647 648 /*-------------------------------------------------------------------------*/ 649 650 static const struct usb_device_id products [] = { 651 { 652 /* 2Wire HomePortal 1000SW */ 653 USB_DEVICE_AND_INTERFACE_INFO(0x1630, 0x0042, 654 USB_CLASS_COMM, 2 /* ACM */, 0x0ff), 655 .driver_info = (unsigned long) &rndis_poll_status_info, 656 }, { 657 /* Hytera Communications DMR radios' "Radio to PC Network" */ 658 USB_VENDOR_AND_INTERFACE_INFO(0x238b, 659 USB_CLASS_COMM, 2 /* ACM */, 0x0ff), 660 .driver_info = (unsigned long)&rndis_info, 661 }, { 662 /* ZTE WWAN modules */ 663 USB_VENDOR_AND_INTERFACE_INFO(0x19d2, 664 USB_CLASS_WIRELESS_CONTROLLER, 1, 3), 665 .driver_info = (unsigned long)&zte_rndis_info, 666 }, { 667 /* ZTE WWAN modules, ACM flavour */ 668 USB_VENDOR_AND_INTERFACE_INFO(0x19d2, 669 USB_CLASS_COMM, 2 /* ACM */, 0x0ff), 670 .driver_info = (unsigned long)&zte_rndis_info, 671 }, { 672 /* RNDIS is MSFT's un-official variant of CDC ACM */ 673 USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff), 674 .driver_info = (unsigned long) &rndis_info, 675 }, { 676 /* Telit Cinterion LE310X1 RNDIS */ 677 USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x7030, 678 USB_CLASS_WIRELESS_CONTROLLER, 1, 3), 679 .driver_info = (unsigned long)&rndis_info_lowpower, 680 }, { 681 /* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */ 682 USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1), 683 .driver_info = (unsigned long) &rndis_poll_status_info, 684 }, { 685 /* RNDIS for tethering */ 686 USB_INTERFACE_INFO(USB_CLASS_WIRELESS_CONTROLLER, 1, 3), 687 .driver_info = (unsigned long) &rndis_info, 688 }, { 689 /* Novatel Verizon USB730L */ 690 USB_INTERFACE_INFO(USB_CLASS_MISC, 4, 1), 691 .driver_info = (unsigned long) &rndis_info, 692 }, 693 { }, // END 694 }; 695 MODULE_DEVICE_TABLE(usb, products); 696 697 static struct usb_driver rndis_driver = { 698 .name = "rndis_host", 699 .id_table = products, 700 .probe = usbnet_probe, 701 .disconnect = usbnet_disconnect, 702 .suspend = usbnet_suspend, 703 .resume = usbnet_resume, 704 .disable_hub_initiated_lpm = 1, 705 }; 706 707 module_usb_driver(rndis_driver); 708 709 MODULE_AUTHOR("David Brownell"); 710 MODULE_DESCRIPTION("USB Host side RNDIS driver"); 711 MODULE_LICENSE("GPL"); 712