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diff --git a/lib/libusb/libusb.h b/lib/libusb/libusb.h
--- a/lib/libusb/libusb.h
+++ b/lib/libusb/libusb.h
@@ -516,6 +516,7 @@
int libusb_attach_kernel_driver(libusb_device_handle * devh, int interface);
int libusb_set_auto_detach_kernel_driver(libusb_device_handle *dev, int enable);
int libusb_set_interface_alt_setting(libusb_device_handle * devh, int interface_number, int alternate_setting);
+libusb_device *libusb_get_parent(libusb_device * dev);
/* USB Descriptors */
diff --git a/lib/libusb/libusb.3 b/lib/libusb/libusb.3
--- a/lib/libusb/libusb.3
+++ b/lib/libusb/libusb.3
@@ -220,6 +220,11 @@
Get the device contained by devh.
Returns NULL on error.
.Pp
+.Ft libusb_device *
+.Fn libusb_get_parent "libusb_device *dev"
+Get dev's parent device.
+Returns NULL if the device has no parent (i.e. is a root device).
+.Pp
.Ft int
.Fn libusb_get_configuration "libusb_device_handle *devh" "int *config"
Returns the value of the current configuration.
diff --git a/lib/libusb/libusb10.h b/lib/libusb/libusb10.h
--- a/lib/libusb/libusb10.h
+++ b/lib/libusb/libusb10.h
@@ -126,6 +126,7 @@
struct libusb_super_pollfd dev_poll;
struct libusb_context *ctx;
+ struct libusb_device *parent_dev;
TAILQ_ENTRY(libusb_device) hotplug_entry;
diff --git a/lib/libusb/libusb10.c b/lib/libusb/libusb10.c
--- a/lib/libusb/libusb10.c
+++ b/lib/libusb/libusb10.c
@@ -3,6 +3,7 @@
*
* Copyright (c) 2009 Sylvestre Gallon. All rights reserved.
* Copyright (c) 2009-2023 Hans Petter Selasky
+ * Copyright (c) 2024 Aymeric Wibo
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -309,9 +310,9 @@
libusb_get_device_list(libusb_context *ctx, libusb_device ***list)
{
struct libusb20_backend *usb_backend;
- struct libusb20_device *pdev;
+ struct libusb20_device *pdev, *parent_dev;
struct libusb_device *dev;
- int i;
+ int i, j, k;
ctx = GET_CONTEXT(ctx);
@@ -363,6 +364,9 @@
/* set context we belong to */
dev->ctx = ctx;
+ /* assume we have no parent by default */
+ dev->parent_dev = NULL;
+
/* link together the two structures */
dev->os_priv = pdev;
pdev->privLuData = dev;
@@ -372,6 +376,25 @@
}
(*list)[i] = NULL;
+ /* for each device, find its parent */
+ for (j = 0; j < i; j++) {
+ pdev = (*list)[j]->os_priv;
+
+ for (k = 0; k < i; k++) {
+ if (k == j)
+ continue;
+
+ parent_dev = (*list)[k]->os_priv;
+
+ if (parent_dev->bus_number != pdev->bus_number)
+ continue;
+ if (parent_dev->device_address == pdev->parent_address) {
+ (*list)[j]->parent_dev = libusb_ref_device((*list)[k]);
+ break;
+ }
+ }
+ }
+
libusb20_be_free(usb_backend);
return (i);
}
@@ -536,6 +559,7 @@
CTX_UNLOCK(dev->ctx);
if (dev->refcnt == 0) {
+ libusb_unref_device(dev->parent_dev);
libusb20_dev_free(dev->os_priv);
free(dev);
}
@@ -812,6 +836,12 @@
return (err ? LIBUSB_ERROR_OTHER : 0);
}
+libusb_device *
+libusb_get_parent(libusb_device *dev)
+{
+ return (dev->parent_dev);
+}
+
static struct libusb20_transfer *
libusb10_get_transfer(struct libusb20_device *pdev,
uint8_t endpoint, uint8_t xfer_index)

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