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-rw-r--r--src/usb.c119
1 files changed, 67 insertions, 52 deletions
diff --git a/src/usb.c b/src/usb.c
index f380b60..2e42e59 100644
--- a/src/usb.c
+++ b/src/usb.c
@@ -67,7 +67,6 @@ struct usb_device {
struct mode_context {
struct libusb_device* dev;
- struct libusb_device_descriptor devdesc;
uint8_t bus, address;
uint8_t bRequest;
uint16_t wValue, wIndex, wLength;
@@ -374,17 +373,32 @@ static int submit_vendor_specific(struct libusb_device_handle *handle, struct mo
uint8_t bRequestType = LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN | LIBUSB_RECIPIENT_DEVICE;
libusb_fill_control_setup(buffer, bRequestType, context->bRequest, context->wValue, context->wIndex, context->wLength);
- ctrl_transfer->flags = LIBUSB_TRANSFER_FREE_TRANSFER | LIBUSB_TRANSFER_FREE_TRANSFER;
+ ctrl_transfer->flags = LIBUSB_TRANSFER_FREE_TRANSFER;
libusb_fill_control_transfer(ctrl_transfer, handle, buffer, callback, context, context->timeout);
ret = libusb_submit_transfer(ctrl_transfer);
return ret;
}
-static int device_complete_initialization(struct mode_context *context, struct libusb_device_handle *handle)
+static struct usb_device* find_device(int bus, int address)
+{
+ FOREACH(struct usb_device *usbdev, &device_list) {
+ if(usbdev->bus == bus && usbdev->address == address) {
+ return usbdev;
+ }
+ } ENDFOREACH
+ return NULL;
+}
+
+static void device_complete_initialization(struct mode_context *context, struct libusb_device_handle *handle)
{
+ struct usb_device *usbdev = find_device(context->bus, context->address);
+ if(!usbdev) {
+ usbmuxd_log(LL_ERROR, "Device %d-%d is missing from device list, aborting initialization", context->bus, context->address);
+ return;
+ }
struct libusb_device *dev = context->dev;
- struct libusb_device_descriptor devdesc = context->devdesc;
+ struct libusb_device_descriptor devdesc = usbdev->devdesc;
int bus = context->bus;
int address = context->address;
int desired_config = devdesc.bNumConfigurations;
@@ -415,15 +429,15 @@ static int device_complete_initialization(struct mode_context *context, struct l
intf->bInterfaceProtocol != INTERFACE_PROTOCOL) {
usbmuxd_log(LL_WARNING, "Device %d-%d: can't find usbmux interface in configuration 5, choosing configuration 4 instead.", bus, address);
desired_config = 4;
- break;
}
+ libusb_free_config_descriptor(config);
} while (0);
}
int current_config = 0;
if((res = libusb_get_configuration(handle, &current_config)) != 0) {
usbmuxd_log(LL_WARNING, "Could not get configuration for device %d-%d: %s", bus, address, libusb_error_name(res));
- libusb_close(handle);
- return -1;
+ usbdev->alive = 0;
+ return;
}
if (current_config != desired_config) {
struct libusb_config_descriptor *config;
@@ -452,22 +466,18 @@ static int device_complete_initialization(struct mode_context *context, struct l
usbmuxd_log(LL_INFO, "Setting configuration for device %d-%d, from %d to %d", bus, address, current_config, desired_config);
if((res = libusb_set_configuration(handle, desired_config)) != 0) {
usbmuxd_log(LL_WARNING, "Could not set configuration %d for device %d-%d: %s", desired_config, bus, address, libusb_error_name(res));
- libusb_close(handle);
- return -1;
+ usbdev->alive = 0;
+ return;
}
}
struct libusb_config_descriptor *config;
if((res = libusb_get_active_config_descriptor(dev, &config)) != 0) {
usbmuxd_log(LL_WARNING, "Could not get configuration descriptor for device %d-%d: %s", bus, address, libusb_error_name(res));
- libusb_close(handle);
- return -1;
+ usbdev->alive = 0;
+ return;
}
- struct usb_device *usbdev;
- usbdev = malloc(sizeof(struct usb_device));
- memset(usbdev, 0, sizeof(*usbdev));
-
for(j=0; j<config->bNumInterfaces; j++) {
const struct libusb_interface_descriptor *intf = &config->interface[j].altsetting[0];
if(intf->bInterfaceClass != INTERFACE_CLASS ||
@@ -500,34 +510,30 @@ static int device_complete_initialization(struct mode_context *context, struct l
if(j == config->bNumInterfaces) {
usbmuxd_log(LL_WARNING, "Could not find a suitable USB interface for device %d-%d", bus, address);
libusb_free_config_descriptor(config);
- libusb_close(handle);
- free(usbdev);
- return -1;
+ usbdev->alive = 0;
+ return;
}
libusb_free_config_descriptor(config);
if((res = libusb_claim_interface(handle, usbdev->interface)) != 0) {
usbmuxd_log(LL_WARNING, "Could not claim interface %d for device %d-%d: %s", usbdev->interface, bus, address, libusb_error_name(res));
- libusb_close(handle);
- free(usbdev);
- return -1;
+ usbdev->alive = 0;
+ return;
}
transfer = libusb_alloc_transfer(0);
if(!transfer) {
usbmuxd_log(LL_WARNING, "Failed to allocate transfer for device %d-%d: %s", bus, address, libusb_error_name(res));
- libusb_close(handle);
- free(usbdev);
- return -1;
+ usbdev->alive = 0;
+ return;
}
unsigned char *transfer_buffer = malloc(1024 + LIBUSB_CONTROL_SETUP_SIZE + 8);
if (!transfer_buffer) {
usbmuxd_log(LL_WARNING, "Failed to allocate transfer buffer for device %d-%d: %s", bus, address, libusb_error_name(res));
- libusb_close(handle);
- free(usbdev);
- return -1;
+ usbdev->alive = 0;
+ return;
}
memset(transfer_buffer, '\0', 1024 + LIBUSB_CONTROL_SETUP_SIZE + 8);
@@ -577,18 +583,10 @@ static int device_complete_initialization(struct mode_context *context, struct l
if((res = libusb_submit_transfer(transfer)) < 0) {
usbmuxd_log(LL_ERROR, "Could not request transfer for device %d-%d: %s", usbdev->bus, usbdev->address, libusb_error_name(res));
libusb_free_transfer(transfer);
- libusb_close(handle);
free(transfer_buffer);
- free(usbdev);
- return -1;
+ usbdev->alive = 0;
+ return;
}
-
- collection_init(&usbdev->tx_xfers);
- collection_init(&usbdev->rx_xfers);
-
- collection_add(&device_list, usbdev);
-
- return 0;
}
static void switch_mode_cb(struct libusb_transfer* transfer)
@@ -603,6 +601,8 @@ static void switch_mode_cb(struct libusb_transfer* transfer)
usbmuxd_log(LL_INFO, "Received response %i for switch mode %i for device %i-%i", data[0], context->wIndex, context->bus, context->address);
}
free(transfer->user_data);
+ if(transfer->buffer)
+ free(transfer->buffer);
}
static void get_mode_cb(struct libusb_transfer* transfer)
@@ -628,11 +628,11 @@ static void get_mode_cb(struct libusb_transfer* transfer)
else if(!strncmp(desired_mode, "3", 1)) {
context->wIndex = 0x3;
}
- // Response is 3:3:3 for initial mode, 5:3:3 otherwise.
+ // Response is 3:3:3:0 for initial mode, 5:3:3:0 otherwise.
// In later commit, should infer the mode from available configurations and interfaces.
- usbmuxd_log(LL_INFO, "Received response %i:%i:%i for get_mode request for device %i-%i", data[0], data[1], data[2], context->bus, context->address);
- if(context->wIndex > 1 && data[0] == 3 && data[1] == 3 && data[2] == 3) {
- // 3:3:3 means the initial mode
+ usbmuxd_log(LL_INFO, "Received response %i:%i:%i:%i for get_mode request for device %i-%i", data[0], data[1], data[2], data[3], context->bus, context->address);
+ if(context->wIndex > 1 && data[0] == 3 && data[1] == 3 && data[2] == 3 && data[3] == 0) {
+ // 3:3:3:0 means the initial mode
usbmuxd_log(LL_WARNING, "Switching device %i-%i mode to %i", context->bus, context->address, context->wIndex);
context->bRequest = APPLE_VEND_SPECIFIC_SET_MODE;
@@ -644,11 +644,13 @@ static void get_mode_cb(struct libusb_transfer* transfer)
}
}
else {
- // in other modes, usually 5:3:3
+ // in other modes, usually 5:3:3:0
usbmuxd_log(LL_WARNING, "Skipping switch device %i-%i mode", context->bus, context->address);
device_complete_initialization(context, transfer->dev_handle);
free(context);
}
+ if(transfer->buffer)
+ free(transfer->buffer);
}
static int usb_device_add(libusb_device* dev)
@@ -658,16 +660,11 @@ static int usb_device_add(libusb_device* dev)
uint8_t bus = libusb_get_bus_number(dev);
uint8_t address = libusb_get_device_address(dev);
struct libusb_device_descriptor devdesc;
- int found = 0;
- FOREACH(struct usb_device *usbdev, &device_list) {
- if(usbdev->bus == bus && usbdev->address == address) {
- usbdev->alive = 1;
- found = 1;
- break;
- }
- } ENDFOREACH
- if(found)
+ struct usb_device *usbdev = find_device(bus, address);
+ if(usbdev) {
+ usbdev->alive = 1;
return 0; //device already found
+ }
if((res = libusb_get_device_descriptor(dev, &devdesc)) != 0) {
usbmuxd_log(LL_WARNING, "Could not get device descriptor for device %d-%d: %s", bus, address, libusb_error_name(res));
@@ -690,6 +687,23 @@ static int usb_device_add(libusb_device* dev)
return -1;
}
+ // Add the created handle to the device list, so we can close it in case of failure/disconnection
+ usbdev = malloc(sizeof(struct usb_device));
+ memset(usbdev, 0, sizeof(*usbdev));
+
+ usbdev->serial[0] = 0;
+ usbdev->bus = bus;
+ usbdev->address = address;
+ usbdev->devdesc = devdesc;
+ usbdev->speed = 0;
+ usbdev->dev = handle;
+ usbdev->alive = 1;
+
+ collection_init(&usbdev->tx_xfers);
+ collection_init(&usbdev->rx_xfers);
+
+ collection_add(&device_list, usbdev);
+
// On top of configurations, Apple have multiple "modes" for devices, namely:
// 1: An "initial" mode with 4 configurations
// 2: "Valeria" mode, where configuration 5 is included with interface for H.265 video capture (activated when recording screen with QuickTime in macOS)
@@ -698,7 +712,6 @@ static int usb_device_add(libusb_device* dev)
usbmuxd_log(LL_INFO, "Requesting current mode from device %i-%i", bus, address);
struct mode_context* context = malloc(sizeof(struct mode_context));
context->dev = dev;
- context->devdesc = devdesc;
context->bus = bus;
context->address = address;
context->bRequest = APPLE_VEND_SPECIFIC_GET_MODE;
@@ -709,6 +722,8 @@ static int usb_device_add(libusb_device* dev)
if(submit_vendor_specific(handle, context, get_mode_cb) != 0) {
usbmuxd_log(LL_WARNING, "Could not request current mode from device %d-%d", bus, address);
+ // Schedule device for close and cleanup
+ usbdev->alive = 0;
return -1;
}
return 0;
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