setup_packet.h

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#ifndef ION_DEVICE_USB_SETUP_PACKET_H
#define ION_DEVICE_USB_SETUP_PACKET_H

#include <stdint.h>

namespace Ion {
namespace USB {
namespace Device {

class SetupPacket {
public:
  enum class TransactionType {
    SetupTransaction,
    InTransaction,
    OutTransaction
  };

  enum class RequestType {
    Standard = 0,
    Class = 1,
    Vendor = 2
  };

  enum class RecipientType {
    Device = 0,
    Interface = 1,
    Endpoint = 2,
    Other = 3
  };

  constexpr SetupPacket() :
    m_bmRequestType(0),
    m_bRequest(0),
    m_wValue(0),
    m_wIndex(0),
    m_wLength(0)
  {
  }

  SetupPacket(void * buffer);
  TransactionType followingTransaction() const;
  RequestType requestType() const;
  RecipientType recipientType() const;
  int descriptorIndex();
  int descriptorType();
  uint8_t bmRequestType() { return m_bmRequestType; }
  uint8_t bRequest() { return m_bRequest; }
  uint16_t wValue() { return m_wValue; }
  uint16_t wIndex() { return m_wIndex; }
  uint16_t wLength() { return m_wLength; }
private:
  uint8_t m_bmRequestType;
  uint8_t m_bRequest;
  uint16_t m_wValue;
  uint16_t m_wIndex;
  uint16_t m_wLength;
};

static_assert(sizeof(SetupPacket) == 8, "SetupData must be packed");

}
}
}

#endif