diff options
Diffstat (limited to 'usbmuxd/usb-linux.c')
| -rw-r--r-- | usbmuxd/usb-linux.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/usbmuxd/usb-linux.c b/usbmuxd/usb-linux.c index fb22d03..2d6053e 100644 --- a/usbmuxd/usb-linux.c +++ b/usbmuxd/usb-linux.c @@ -33,6 +33,17 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA #include "log.h" #include "device.h" +#ifndef LIBUSB_TRANSFER_ZERO_PACKET +#warning Your libusb is missing proper Zero Length Packet support! +#warning +#warning If you are using a recent libusb Git, things may or may not work. +#warning If you are using libusb 1.0.2 or earlier, things will definitely not work +#warning properly. +#warning +#warning Please apply the patch in the contrib/ directory to your libusb 1.0 tree. +#define EXPLICIT_ZLP_TRANSACTION +#endif + // interval for device connection/disconnection polling, in milliseconds // we need this because there is currently no asynchronous device discovery mechanism in libusb #define DEVICE_POLL_TIME 1000 @@ -134,15 +145,33 @@ int usb_send(struct usb_device *dev, const unsigned char *buf, int length) struct libusb_transfer *xfer = libusb_alloc_transfer(0); libusb_fill_bulk_transfer(xfer, dev->dev, BULK_OUT, (void*)buf, length, tx_callback, dev, 0); xfer->flags = LIBUSB_TRANSFER_SHORT_NOT_OK; +#ifndef EXPLICIT_ZLP_TRANSACTION if (length % dev->wMaxPacketSize == 0) { xfer->flags |= LIBUSB_TRANSFER_ZERO_PACKET; } +#endif if((res = libusb_submit_transfer(xfer)) < 0) { usbmuxd_log(LL_ERROR, "Failed to submit TX transfer %p len %d to device %d-%d: %d", buf, length, dev->bus, dev->address, res); libusb_free_transfer(xfer); return res; } collection_add(&dev->tx_xfers, xfer); +#ifdef EXPLICIT_ZLP_TRANSACTION + if (length % dev->wMaxPacketSize == 0) { + usbmuxd_log(LL_DEBUG, "Send ZLP"); + // Send Zero Length Packet + xfer = libusb_alloc_transfer(0); + void *buffer = malloc(1); + libusb_fill_bulk_transfer(xfer, dev->dev, BULK_OUT, buffer, 0, tx_callback, dev, 0); + xfer->flags = LIBUSB_TRANSFER_SHORT_NOT_OK; + if((res = libusb_submit_transfer(xfer)) < 0) { + usbmuxd_log(LL_ERROR, "Failed to submit TX ZLP transfer to device %d-%d: %d", dev->bus, dev->address, res); + libusb_free_transfer(xfer); + return res; + } + collection_add(&dev->tx_xfers, xfer); + } +#endif return 0; } |