interface chiron
{
	const int MD5_HASH_LEN = 0x10;
	const int CHALLENGE_LEN = 0x9;
	const int MSG_HDR_LEN = 0x4;

	typedef [public,enum8bit] enum {
		CHIRON_ACCOUNT = 0x41, /* 'A' */
		CHIRON_CHALLENGE = 0x43, /* 'C' */
		CHIRON_RESPONSE = 0x52, /* 'R' */
		CHIRON_HANDSHAKE = 0x4B, /* 'K' */
		CHIRON_ACK = 0x55, /* 'U' */
		CHIRON_UNKNOWN = 0x48, /* 'H' */
		CHIRON_TRANSPARENT = 0x54 /* 'T' */
	} chiron_msg_type;

	typedef [public,enum8bit] enum {
		CHIRON_EL_DEVSTATE = 0x0C,
		CHIRON_EL_UNKNOWN_BOOL1 = 0x16,
		CHIRON_EL_DEVICEID1 = 0x17,
		CHIRON_EL_DEVICEID2 = 0x18,
		CHIRON_EL_MODE_ENABLED = 0x20, /* == 0x13 */
		CHIRON_EL_GSM_SETTING_G6 = 0x21,
		CHIRON_EL_UNKNOWN_BOOL2 = 0x22,
		CHIRON_EL_THREEBYTE_STATUS = 0x26,
		CHIRON_EL_GSM_SETTING_G3_G19 = 0x27,
		CHIRON_EL_UNKNOWN_BYTE1 = 0x2C,
		CHIRON_EL_TROUBLE_MESSAGE1 = 0x2D,
		CHIRON_EL_TROUBLE_MESSAGE2 = 0x36,
		CHIRON_EL_GSM_SETTING_G4 = 0x40
	} chiron_element_tag;

	typedef [public,flag(LIBNDR_FLAG_NOALIGN)] struct {
		uint8 length;
		uint8 account_code[length];
	} chiron_msg_account;

	typedef [public,flag(LIBNDR_FLAG_NOALIGN)] struct {
		uint8 length;
		uint8 md5_check[MD5_HASH_LEN];
		uint8 challenge[length - 0x10];
	} chiron_msg_challenge;

	typedef [public,flag(LIBNDR_FLAG_NOALIGN)] struct {
		uint8 length;
		uint8 md5_check[MD5_HASH_LEN];
		uint8 payload[length - MD5_HASH_LEN];
	} chiron_msg_response;

	typedef [public,flag(LIBNDR_FLAG_NOALIGN)] struct {
		uint8 length;
		uint8 data[length];
	} chiron_msg_handshake;

	typedef [public,flag(LIBNDR_FLAG_NOALIGN)] struct {
		uint8 length;        // Always 0
		uint8 data[length];
	} chiron_msg_ack;

	typedef [public,flag(LIBNDR_FLAG_NOALIGN)] struct {
		uint8 length;
		uint8 data[length];
	} chiron_msg_unknown;

	typedef [nodiscriminant,public,flag(LIBNDR_FLAG_NOALIGN)] union {
		[case(CHIRON_ACCOUNT)] chiron_msg_account account;
		[case(CHIRON_CHALLENGE)] chiron_msg_challenge challenge;
		[case(CHIRON_RESPONSE)] chiron_msg_response response;
		[case(CHIRON_HANDSHAKE)] chiron_msg_handshake handshake;
		[case(CHIRON_ACK)] chiron_msg_ack ack;
		[default] chiron_msg_unknown unknown;
	} chiron_msg_union;

	// Alternative format
	typedef [public,flag(LIBNDR_FLAG_NOALIGN)] struct {
		uint8 something01;  // seen only 01
		uint8 otherthing01; // seen only 01
		uint8 seq;
		uint8 someflag;     // seen 00 and 01, 01 after the response handshake, and message 0x48 'H' is issued.
		uint8 something00;  //seen only 00
		uint8 length;
		chiron_msg_type msg_type;
		[switch_is(msg_type)] chiron_msg_union msg;
	} chiron_alt_message;

	typedef [public,flag(LIBNDR_FLAG_NOALIGN)] struct {
		chiron_msg_type msg_type;
		uint8 seq;
		uint8 flags;
		[switch_is(msg_type)] chiron_msg_union msg;
	} chiron_message;

}