// ========================================================================================================
// ========================================================================================================
// *********************************************** common.h ***********************************************
// ========================================================================================================
// ========================================================================================================

#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>  
#include <sys/mman.h>

#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h> 
#include <netdb.h> 

#include <time.h>
#include <sys/time.h>

//Final number of bits used as secret key
#define SECRET_KEY_BITS 256

// Tunable parameters
#define MAX_VECS 15000
#define MAX_SAMS 128

// Scratch pad string size
#define MAX_STRING_LEN 2000

// Keccak and VHDL dependent constants
#define VEC_LEN_BITS 16
#define MAX_OUTPUTS 16
#define MAX_VECS_OUTPUTS (MAX_OUTPUTS * MAX_VECS)

#define VEC_CHUNK_SIZE 16

#define MAX_BINARY_BYTES 500

// With 8 bits/byte, this provides 2400 bits. Our max is 2048 bits (256 bytes) for helper data if we need it all.
#define MAX_BS_BYTES 300


// VHDL constants
#define PNL_BRAM_NUM_WORDS_NB 4096
#define TVCOMP_NUM_PNDIFFS (PNL_BRAM_NUM_WORDS_NB/2)

// NOTE: This is the range I'm using in the hardware. I find the largest negative value in the distribution, subtract
// that from all values (shifting the distribution left for negative largest values and right for positive). The
// binning of values therefore starts at bin 0 and goes up through the largest positive value (minus the negative value).
// Distribution ranges are typically between 250 to 300. In the hardware, I also preserve 1 digit of precision, which is
// equivalent to multiplying the range by 2. I also do this on the server to get extra precision out of the range.
#define DIST_RANGE 1024

// Represents +6.25% and -93.75% since NUMBER of PNDIFFS is 2048. Given w.r.t. TVCOMP_NUM_PNDIFFS defined above.
#define RANGE_LOW_LIMIT 128
#define RANGE_HIGH_LIMIT 1920


int OpenSocketServer(int str_length, int *server_socket_desc_ptr, char server_IP[str_length], 
   int port_number, int *client_socket_desc_ptr, struct sockaddr_in *client_addr_ptr, 
   int accept_only, int check_and_return);

void OpenSocketClient(int str_length, char server_IP[str_length], int port_number, 
   int *server_socket_desc_ptr);

int SockGetB(unsigned char *buffer, int buffer_size, int socket_desc);

int SockSendB(unsigned char *buffer, int buffer_size, int socket_desc);