Type Alias ConfigurationDescriptorChain 

pub type ConfigurationDescriptorChain<'a> = DescriptorChain<'a, ConfigurationDescriptor>;

The chain of descriptors of a ConfigurationDescriptor.

When you request the configuration descriptor of a usb device you get a chain of descriptors (USB 2.0 §9.6.3). The chain includes interface descriptors, endpoint descriptors, and possibly other descriptors.

The total length of the chain is in ConfigurationDescriptor::total_len.

Aliased Type

pub struct ConfigurationDescriptorChain<'a> {
    pub descriptor: ConfigurationDescriptor,
    pub buffer: &'a [u8],
}

Fields

descriptor: ConfigurationDescriptor

The current descriptor.

buffer: &'a [u8]

The raw bytes following the descriptor.

Implementations

impl<'a> ConfigurationDescriptorChain<'a>

pub fn try_from_slice(buf: &'a [u8]) -> Result<Self, HostError>

Parse a full Configuration Descriptor blob, giving access to sub-descriptors via iterators.

pub fn iter_descriptors(&self) -> RawDescriptorIterator<'a>

Iterate over all raw descriptors in this Configuration.

pub fn iter_interface(&self) -> InterfaceIterator<'_>

Iterate over all interface descriptors of this Configuration.

pub fn visit_descriptors<V: DescriptorVisitor<'a>>( &self, visitor: &mut V, ) -> Result<(), VisitError<V::Error>>

Iterate over all descriptors of this Configuration, passing to Visitor callbacks. Returns Ok(()) on completion (including early stop), or Err(e) on error.