1 /* 2 * ipheth.c - Apple iPhone USB Ethernet driver 3 * 4 * Copyright (c) 2009 Diego Giagio <diego@giagio.com> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of GIAGIO.COM nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * Alternatively, provided that this notice is retained in full, this 20 * software may be distributed under the terms of the GNU General 21 * Public License ("GPL") version 2, in which case the provisions of the 22 * GPL apply INSTEAD OF those given above. 23 * 24 * The provided data structures and external interfaces from this code 25 * are not restricted to be used by modules with a GPL compatible license. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 31 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 33 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 35 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 38 * DAMAGE. 39 * 40 * 41 * Attention: iPhone device must be paired, otherwise it won't respond to our 42 * driver. For more info: http://giagio.com/wiki/moin.cgi/iPhoneEthernetDriver 43 * 44 */ 45 46 #include <linux/kernel.h> 47 #include <linux/errno.h> 48 #include <linux/slab.h> 49 #include <linux/module.h> 50 #include <linux/netdevice.h> 51 #include <linux/etherdevice.h> 52 #include <linux/ethtool.h> 53 #include <linux/usb.h> 54 #include <linux/workqueue.h> 55 56 #define USB_VENDOR_APPLE 0x05ac 57 #define USB_PRODUCT_IPHONE 0x1290 58 #define USB_PRODUCT_IPHONE_3G 0x1292 59 #define USB_PRODUCT_IPHONE_3GS 0x1294 60 #define USB_PRODUCT_IPHONE_4 0x1297 61 #define USB_PRODUCT_IPAD 0x129a 62 #define USB_PRODUCT_IPAD_2 0x12a2 63 #define USB_PRODUCT_IPAD_3 0x12a6 64 #define USB_PRODUCT_IPAD_MINI 0x12ab 65 #define USB_PRODUCT_IPHONE_4_VZW 0x129c 66 #define USB_PRODUCT_IPHONE_4S 0x12a0 67 #define USB_PRODUCT_IPHONE_5 0x12a8 68 69 #define IPHETH_USBINTF_CLASS 255 70 #define IPHETH_USBINTF_SUBCLASS 253 71 #define IPHETH_USBINTF_PROTO 1 72 73 #define IPHETH_BUF_SIZE 1516 74 #define IPHETH_IP_ALIGN 2 /* padding at front of URB */ 75 #define IPHETH_TX_TIMEOUT (5 * HZ) 76 77 #define IPHETH_INTFNUM 2 78 #define IPHETH_ALT_INTFNUM 1 79 80 #define IPHETH_CTRL_ENDP 0x00 81 #define IPHETH_CTRL_BUF_SIZE 0x40 82 #define IPHETH_CTRL_TIMEOUT (5 * HZ) 83 84 #define IPHETH_CMD_GET_MACADDR 0x00 85 #define IPHETH_CMD_CARRIER_CHECK 0x45 86 87 #define IPHETH_CARRIER_CHECK_TIMEOUT round_jiffies_relative(1 * HZ) 88 #define IPHETH_CARRIER_ON 0x04 89 90 static const struct usb_device_id ipheth_table[] = { 91 { USB_DEVICE_AND_INTERFACE_INFO( 92 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE, 93 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS, 94 IPHETH_USBINTF_PROTO) }, 95 { USB_DEVICE_AND_INTERFACE_INFO( 96 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_3G, 97 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS, 98 IPHETH_USBINTF_PROTO) }, 99 { USB_DEVICE_AND_INTERFACE_INFO( 100 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_3GS, 101 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS, 102 IPHETH_USBINTF_PROTO) }, 103 { USB_DEVICE_AND_INTERFACE_INFO( 104 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_4, 105 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS, 106 IPHETH_USBINTF_PROTO) }, 107 { USB_DEVICE_AND_INTERFACE_INFO( 108 USB_VENDOR_APPLE, USB_PRODUCT_IPAD, 109 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS, 110 IPHETH_USBINTF_PROTO) }, 111 { USB_DEVICE_AND_INTERFACE_INFO( 112 USB_VENDOR_APPLE, USB_PRODUCT_IPAD_2, 113 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS, 114 IPHETH_USBINTF_PROTO) }, 115 { USB_DEVICE_AND_INTERFACE_INFO( 116 USB_VENDOR_APPLE, USB_PRODUCT_IPAD_3, 117 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS, 118 IPHETH_USBINTF_PROTO) }, 119 { USB_DEVICE_AND_INTERFACE_INFO( 120 USB_VENDOR_APPLE, USB_PRODUCT_IPAD_MINI, 121 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS, 122 IPHETH_USBINTF_PROTO) }, 123 { USB_DEVICE_AND_INTERFACE_INFO( 124 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_4_VZW, 125 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS, 126 IPHETH_USBINTF_PROTO) }, 127 { USB_DEVICE_AND_INTERFACE_INFO( 128 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_4S, 129 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS, 130 IPHETH_USBINTF_PROTO) }, 131 { USB_DEVICE_AND_INTERFACE_INFO( 132 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_5, 133 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS, 134 IPHETH_USBINTF_PROTO) }, 135 { } 136 }; 137 MODULE_DEVICE_TABLE(usb, ipheth_table); 138 139 struct ipheth_device { 140 struct usb_device *udev; 141 struct usb_interface *intf; 142 struct net_device *net; 143 struct urb *tx_urb; 144 struct urb *rx_urb; 145 unsigned char *tx_buf; 146 unsigned char *rx_buf; 147 unsigned char *ctrl_buf; 148 u8 bulk_in; 149 u8 bulk_out; 150 struct delayed_work carrier_work; 151 bool confirmed_pairing; 152 }; 153 154 static int ipheth_rx_submit(struct ipheth_device *dev, gfp_t mem_flags); 155 156 static int ipheth_alloc_urbs(struct ipheth_device *iphone) 157 { 158 struct urb *tx_urb = NULL; 159 struct urb *rx_urb = NULL; 160 u8 *tx_buf = NULL; 161 u8 *rx_buf = NULL; 162 163 tx_urb = usb_alloc_urb(0, GFP_KERNEL); 164 if (tx_urb == NULL) 165 goto error_nomem; 166 167 rx_urb = usb_alloc_urb(0, GFP_KERNEL); 168 if (rx_urb == NULL) 169 goto free_tx_urb; 170 171 tx_buf = usb_alloc_coherent(iphone->udev, IPHETH_BUF_SIZE, 172 GFP_KERNEL, &tx_urb->transfer_dma); 173 if (tx_buf == NULL) 174 goto free_rx_urb; 175 176 rx_buf = usb_alloc_coherent(iphone->udev, IPHETH_BUF_SIZE, 177 GFP_KERNEL, &rx_urb->transfer_dma); 178 if (rx_buf == NULL) 179 goto free_tx_buf; 180 181 182 iphone->tx_urb = tx_urb; 183 iphone->rx_urb = rx_urb; 184 iphone->tx_buf = tx_buf; 185 iphone->rx_buf = rx_buf; 186 return 0; 187 188 free_tx_buf: 189 usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, tx_buf, 190 tx_urb->transfer_dma); 191 free_rx_urb: 192 usb_free_urb(rx_urb); 193 free_tx_urb: 194 usb_free_urb(tx_urb); 195 error_nomem: 196 return -ENOMEM; 197 } 198 199 static void ipheth_free_urbs(struct ipheth_device *iphone) 200 { 201 usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, iphone->rx_buf, 202 iphone->rx_urb->transfer_dma); 203 usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, iphone->tx_buf, 204 iphone->tx_urb->transfer_dma); 205 usb_free_urb(iphone->rx_urb); 206 usb_free_urb(iphone->tx_urb); 207 } 208 209 static void ipheth_kill_urbs(struct ipheth_device *dev) 210 { 211 usb_kill_urb(dev->tx_urb); 212 usb_kill_urb(dev->rx_urb); 213 } 214 215 static void ipheth_rcvbulk_callback(struct urb *urb) 216 { 217 struct ipheth_device *dev; 218 struct sk_buff *skb; 219 int status; 220 char *buf; 221 int len; 222 223 dev = urb->context; 224 if (dev == NULL) 225 return; 226 227 status = urb->status; 228 switch (status) { 229 case -ENOENT: 230 case -ECONNRESET: 231 case -ESHUTDOWN: 232 case -EPROTO: 233 return; 234 case 0: 235 break; 236 default: 237 dev_err(&dev->intf->dev, "%s: urb status: %d\n", 238 __func__, status); 239 return; 240 } 241 242 if (urb->actual_length <= IPHETH_IP_ALIGN) { 243 dev->net->stats.rx_length_errors++; 244 return; 245 } 246 len = urb->actual_length - IPHETH_IP_ALIGN; 247 buf = urb->transfer_buffer + IPHETH_IP_ALIGN; 248 249 skb = dev_alloc_skb(len); 250 if (!skb) { 251 dev_err(&dev->intf->dev, "%s: dev_alloc_skb: -ENOMEM\n", 252 __func__); 253 dev->net->stats.rx_dropped++; 254 return; 255 } 256 257 skb_put_data(skb, buf, len); 258 skb->dev = dev->net; 259 skb->protocol = eth_type_trans(skb, dev->net); 260 261 dev->net->stats.rx_packets++; 262 dev->net->stats.rx_bytes += len; 263 dev->confirmed_pairing = true; 264 netif_rx(skb); 265 ipheth_rx_submit(dev, GFP_ATOMIC); 266 } 267 268 static void ipheth_sndbulk_callback(struct urb *urb) 269 { 270 struct ipheth_device *dev; 271 int status = urb->status; 272 273 dev = urb->context; 274 if (dev == NULL) 275 return; 276 277 if (status != 0 && 278 status != -ENOENT && 279 status != -ECONNRESET && 280 status != -ESHUTDOWN) 281 dev_err(&dev->intf->dev, "%s: urb status: %d\n", 282 __func__, status); 283 284 if (status == 0) 285 netif_wake_queue(dev->net); 286 else 287 // on URB error, trigger immediate poll 288 schedule_delayed_work(&dev->carrier_work, 0); 289 } 290 291 static int ipheth_carrier_set(struct ipheth_device *dev) 292 { 293 struct usb_device *udev; 294 int retval; 295 296 if (!dev) 297 return 0; 298 if (!dev->confirmed_pairing) 299 return 0; 300 301 udev = dev->udev; 302 retval = usb_control_msg(udev, 303 usb_rcvctrlpipe(udev, IPHETH_CTRL_ENDP), 304 IPHETH_CMD_CARRIER_CHECK, /* request */ 305 0xc0, /* request type */ 306 0x00, /* value */ 307 0x02, /* index */ 308 dev->ctrl_buf, IPHETH_CTRL_BUF_SIZE, 309 IPHETH_CTRL_TIMEOUT); 310 if (retval < 0) { 311 dev_err(&dev->intf->dev, "%s: usb_control_msg: %d\n", 312 __func__, retval); 313 return retval; 314 } 315 316 if (dev->ctrl_buf[0] == IPHETH_CARRIER_ON) { 317 netif_carrier_on(dev->net); 318 if (dev->tx_urb->status != -EINPROGRESS) 319 netif_wake_queue(dev->net); 320 } else { 321 netif_carrier_off(dev->net); 322 netif_stop_queue(dev->net); 323 } 324 return 0; 325 } 326 327 static void ipheth_carrier_check_work(struct work_struct *work) 328 { 329 struct ipheth_device *dev = container_of(work, struct ipheth_device, 330 carrier_work.work); 331 332 ipheth_carrier_set(dev); 333 schedule_delayed_work(&dev->carrier_work, IPHETH_CARRIER_CHECK_TIMEOUT); 334 } 335 336 static int ipheth_get_macaddr(struct ipheth_device *dev) 337 { 338 struct usb_device *udev = dev->udev; 339 struct net_device *net = dev->net; 340 int retval; 341 342 retval = usb_control_msg(udev, 343 usb_rcvctrlpipe(udev, IPHETH_CTRL_ENDP), 344 IPHETH_CMD_GET_MACADDR, /* request */ 345 0xc0, /* request type */ 346 0x00, /* value */ 347 0x02, /* index */ 348 dev->ctrl_buf, 349 IPHETH_CTRL_BUF_SIZE, 350 IPHETH_CTRL_TIMEOUT); 351 if (retval < 0) { 352 dev_err(&dev->intf->dev, "%s: usb_control_msg: %d\n", 353 __func__, retval); 354 } else if (retval < ETH_ALEN) { 355 dev_err(&dev->intf->dev, 356 "%s: usb_control_msg: short packet: %d bytes\n", 357 __func__, retval); 358 retval = -EINVAL; 359 } else { 360 memcpy(net->dev_addr, dev->ctrl_buf, ETH_ALEN); 361 retval = 0; 362 } 363 364 return retval; 365 } 366 367 static int ipheth_rx_submit(struct ipheth_device *dev, gfp_t mem_flags) 368 { 369 struct usb_device *udev = dev->udev; 370 int retval; 371 372 usb_fill_bulk_urb(dev->rx_urb, udev, 373 usb_rcvbulkpipe(udev, dev->bulk_in), 374 dev->rx_buf, IPHETH_BUF_SIZE, 375 ipheth_rcvbulk_callback, 376 dev); 377 dev->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 378 379 retval = usb_submit_urb(dev->rx_urb, mem_flags); 380 if (retval) 381 dev_err(&dev->intf->dev, "%s: usb_submit_urb: %d\n", 382 __func__, retval); 383 return retval; 384 } 385 386 static int ipheth_open(struct net_device *net) 387 { 388 struct ipheth_device *dev = netdev_priv(net); 389 struct usb_device *udev = dev->udev; 390 int retval = 0; 391 392 usb_set_interface(udev, IPHETH_INTFNUM, IPHETH_ALT_INTFNUM); 393 394 retval = ipheth_carrier_set(dev); 395 if (retval) 396 return retval; 397 398 retval = ipheth_rx_submit(dev, GFP_KERNEL); 399 if (retval) 400 return retval; 401 402 schedule_delayed_work(&dev->carrier_work, IPHETH_CARRIER_CHECK_TIMEOUT); 403 return retval; 404 } 405 406 static int ipheth_close(struct net_device *net) 407 { 408 struct ipheth_device *dev = netdev_priv(net); 409 410 cancel_delayed_work_sync(&dev->carrier_work); 411 netif_stop_queue(net); 412 return 0; 413 } 414 415 static int ipheth_tx(struct sk_buff *skb, struct net_device *net) 416 { 417 struct ipheth_device *dev = netdev_priv(net); 418 struct usb_device *udev = dev->udev; 419 int retval; 420 421 /* Paranoid */ 422 if (skb->len > IPHETH_BUF_SIZE) { 423 WARN(1, "%s: skb too large: %d bytes\n", __func__, skb->len); 424 dev->net->stats.tx_dropped++; 425 dev_kfree_skb_any(skb); 426 return NETDEV_TX_OK; 427 } 428 429 memcpy(dev->tx_buf, skb->data, skb->len); 430 if (skb->len < IPHETH_BUF_SIZE) 431 memset(dev->tx_buf + skb->len, 0, IPHETH_BUF_SIZE - skb->len); 432 433 usb_fill_bulk_urb(dev->tx_urb, udev, 434 usb_sndbulkpipe(udev, dev->bulk_out), 435 dev->tx_buf, IPHETH_BUF_SIZE, 436 ipheth_sndbulk_callback, 437 dev); 438 dev->tx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 439 440 retval = usb_submit_urb(dev->tx_urb, GFP_ATOMIC); 441 if (retval) { 442 dev_err(&dev->intf->dev, "%s: usb_submit_urb: %d\n", 443 __func__, retval); 444 dev->net->stats.tx_errors++; 445 dev_kfree_skb_any(skb); 446 } else { 447 dev->net->stats.tx_packets++; 448 dev->net->stats.tx_bytes += skb->len; 449 dev_consume_skb_any(skb); 450 netif_stop_queue(net); 451 } 452 453 return NETDEV_TX_OK; 454 } 455 456 static void ipheth_tx_timeout(struct net_device *net) 457 { 458 struct ipheth_device *dev = netdev_priv(net); 459 460 dev_err(&dev->intf->dev, "%s: TX timeout\n", __func__); 461 dev->net->stats.tx_errors++; 462 usb_unlink_urb(dev->tx_urb); 463 } 464 465 static u32 ipheth_ethtool_op_get_link(struct net_device *net) 466 { 467 struct ipheth_device *dev = netdev_priv(net); 468 return netif_carrier_ok(dev->net); 469 } 470 471 static const struct ethtool_ops ops = { 472 .get_link = ipheth_ethtool_op_get_link 473 }; 474 475 static const struct net_device_ops ipheth_netdev_ops = { 476 .ndo_open = ipheth_open, 477 .ndo_stop = ipheth_close, 478 .ndo_start_xmit = ipheth_tx, 479 .ndo_tx_timeout = ipheth_tx_timeout, 480 }; 481 482 static int ipheth_probe(struct usb_interface *intf, 483 const struct usb_device_id *id) 484 { 485 struct usb_device *udev = interface_to_usbdev(intf); 486 struct usb_host_interface *hintf; 487 struct usb_endpoint_descriptor *endp; 488 struct ipheth_device *dev; 489 struct net_device *netdev; 490 int i; 491 int retval; 492 493 netdev = alloc_etherdev(sizeof(struct ipheth_device)); 494 if (!netdev) 495 return -ENOMEM; 496 497 netdev->netdev_ops = &ipheth_netdev_ops; 498 netdev->watchdog_timeo = IPHETH_TX_TIMEOUT; 499 strcpy(netdev->name, "eth%d"); 500 501 dev = netdev_priv(netdev); 502 dev->udev = udev; 503 dev->net = netdev; 504 dev->intf = intf; 505 dev->confirmed_pairing = false; 506 /* Set up endpoints */ 507 hintf = usb_altnum_to_altsetting(intf, IPHETH_ALT_INTFNUM); 508 if (hintf == NULL) { 509 retval = -ENODEV; 510 dev_err(&intf->dev, "Unable to find alternate settings interface\n"); 511 goto err_endpoints; 512 } 513 514 for (i = 0; i < hintf->desc.bNumEndpoints; i++) { 515 endp = &hintf->endpoint[i].desc; 516 if (usb_endpoint_is_bulk_in(endp)) 517 dev->bulk_in = endp->bEndpointAddress; 518 else if (usb_endpoint_is_bulk_out(endp)) 519 dev->bulk_out = endp->bEndpointAddress; 520 } 521 if (!(dev->bulk_in && dev->bulk_out)) { 522 retval = -ENODEV; 523 dev_err(&intf->dev, "Unable to find endpoints\n"); 524 goto err_endpoints; 525 } 526 527 dev->ctrl_buf = kmalloc(IPHETH_CTRL_BUF_SIZE, GFP_KERNEL); 528 if (dev->ctrl_buf == NULL) { 529 retval = -ENOMEM; 530 goto err_alloc_ctrl_buf; 531 } 532 533 retval = ipheth_get_macaddr(dev); 534 if (retval) 535 goto err_get_macaddr; 536 537 INIT_DELAYED_WORK(&dev->carrier_work, ipheth_carrier_check_work); 538 539 retval = ipheth_alloc_urbs(dev); 540 if (retval) { 541 dev_err(&intf->dev, "error allocating urbs: %d\n", retval); 542 goto err_alloc_urbs; 543 } 544 545 usb_set_intfdata(intf, dev); 546 547 SET_NETDEV_DEV(netdev, &intf->dev); 548 netdev->ethtool_ops = &ops; 549 550 retval = register_netdev(netdev); 551 if (retval) { 552 dev_err(&intf->dev, "error registering netdev: %d\n", retval); 553 retval = -EIO; 554 goto err_register_netdev; 555 } 556 // carrier down and transmit queues stopped until packet from device 557 netif_carrier_off(netdev); 558 netif_tx_stop_all_queues(netdev); 559 dev_info(&intf->dev, "Apple iPhone USB Ethernet device attached\n"); 560 return 0; 561 562 err_register_netdev: 563 ipheth_free_urbs(dev); 564 err_alloc_urbs: 565 err_get_macaddr: 566 err_alloc_ctrl_buf: 567 kfree(dev->ctrl_buf); 568 err_endpoints: 569 free_netdev(netdev); 570 return retval; 571 } 572 573 static void ipheth_disconnect(struct usb_interface *intf) 574 { 575 struct ipheth_device *dev; 576 577 dev = usb_get_intfdata(intf); 578 if (dev != NULL) { 579 unregister_netdev(dev->net); 580 ipheth_kill_urbs(dev); 581 ipheth_free_urbs(dev); 582 kfree(dev->ctrl_buf); 583 free_netdev(dev->net); 584 } 585 usb_set_intfdata(intf, NULL); 586 dev_info(&intf->dev, "Apple iPhone USB Ethernet now disconnected\n"); 587 } 588 589 static struct usb_driver ipheth_driver = { 590 .name = "ipheth", 591 .probe = ipheth_probe, 592 .disconnect = ipheth_disconnect, 593 .id_table = ipheth_table, 594 .disable_hub_initiated_lpm = 1, 595 }; 596 597 module_usb_driver(ipheth_driver); 598 599 MODULE_AUTHOR("Diego Giagio <diego@giagio.com>"); 600 MODULE_DESCRIPTION("Apple iPhone USB Ethernet driver"); 601 MODULE_LICENSE("Dual BSD/GPL"); 602