#ifndef HELPERS_H_
#define HELPERS_H_

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/select.h>
#include <sys/time.h>
#include <signal.h>
#include <string.h>

// Macros to turn a numeric macro into a string literal
#define xstr(s) str(s)
#define str(s) #s

// Neighbor discovery related definitions
#define ARP_CACHE "/proc/net/arp"
#define ARP_STRING_LEN 1023
#define ARP_BUFFER_LEN (ARP_STRING_LEN + 1)

// Format for fscanf() to read the 1st field of ARP
#define ARP_LINE_FORMAT "%" xstr(ARP_STRING_LEN) "s %*s %*s %*s %*s %*s"

void set_timer_and_handler(void (*handler)(int), long int timer_interval);

void enable_echo_broadcast(void);

void search_for_neighbors(void);

int create_socket_and_listen(uint16_t port, uint8_t backlog_size);

void send_message(const char *ipv4, uint16_t port, const char *message);

void accept_connection(int sock, struct sockaddr_in *client_name, fd_set *active_fd_set);

void write_to_peer(int filedes, const char *message);

int read_from_peer(int file_des, uint16_t max_line);

void init_sockaddr(struct sockaddr_in *name, const char *hostname, uint16_t port);

#endif //HELPERS_H_