#DRIS struture
cdef packed struct DRIS:
	# the first 4 fields are never encrypted
	char header[4]					# should be set to DRIS
	# inputs
	int size						# size of this structure
	int seed1						# seed for data/dris encryption
	int seed2						# as above
	# (maybe encrypted from now on)
	int function					# specify only one function
	int flags						# options for the function selected. To use more than one OR them together: OPTION1 | OPTION2...
	unsigned int execs_decrement	# amount by which to dec execs if we use flag: DEC_MANY_EXECS
	int data_crypt_key_num			# number of the key (1-3) that the dongle uses to encrypt or decrypt user data
	int rw_offset					# offset in the dongle data area to read or write data
	int rw_length					# length of data are to read/write/encrypt/decrypt
	char *rw_data_ptr				# pointer to data to write / be read
	char alt_prog_name[256]			# protection check for different program instead of this one, must be null-terminated
	int var_a						# variable values for user algorithm
	int var_b
	int var_c
	int var_d
	int var_e
	int var_f
	int var_g
	int var_h
	int alg_number					# the number of the user algorithm that you want to execute
	# outputs
	int ret_code					# return code from the protection check
	int ext_err						# extended error
	int type						# type of dongle detected. 1 = Pro, 2 = FD
	int model						# model of dongle detected. 1 = Lite, 2 = Plus, 4 = Net 5, 7 = Net Unlimited
	int sdsn						# Software Developer's Serial Number
	char prodcode[12]				# Product Code (null-terminated)
	unsigned int dongle_number
	int update_number
	unsigned int data_area_size		# size of the data area used in the dongle detected
	int max_alg_num					# the maximum algorithm number in the dongle detected
	int execs						# executions left: -1 indicates 'no limit'
	int exp_day						# expiry day: -1 indicates 'no limit'
	int exp_month					# expiry month: -1 indicates 'no limit'
	int exp_year					# expiry year: -1 indicates 'no limit'
	unsigned int features			# features value 
	int net_users					# maximum number of network users for the dongle detected: -1 indicates 'no limit'
	int alg_answer					# answer to the user algorithm executed with the given variable values
	unsigned int fd_capacity		# capacity of the data area in FD dongle.
	char fd_drive[128]				# drive letter of FD dongle detected e.g. 'f:\' (or mount name under Linux)
	int swkey_type					# 0 = no swkey detected, 1 = temporary software key, 2 = demo software key
	int swkey_exp_day				# software key expiry date (if software key detected)
	int swkey_exp_month
	int swkey_exp_year

#NU_INFO struture
cdef packed struct NU_INFO:
	char licenceName[256]
	char userName[50]
	char computerName[256]
	char ipAddress[16]

# declare DDProtCheck (we do it like this because it is stdcall - the default for Cython is cdecl)	
cdef extern from "ddpro.h":
	int __stdcall DDProtCheck(void*, unsigned char*)
	int __stdcall DDGetNetUserList(char*, int*, void*, int, int*)