protocol_support.h

/**
 * This file supports the program in a more eficient way throughout the TCP and UDP communications. 
 * When an ERROR occurs, for the sake of the program, all funcitons close the curruent socket and shut the program down with exit(1) (failure).P
*/

#ifndef PROTOCOL_SUPPORT
#define PROTOCOL_SUPPORT

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

#include "util.h"

int Accept(int socket, struct sockaddr *restrict address, socklen_t *restrict address_len);
void Bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
void Close(int fildes);
int Connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
void Getaddrinfo(const char *hostname, const char *servname, const struct addrinfo *hints, struct addrinfo **res);
int Listen(int sockfd);
ssize_t Read(int fd, char *buf);
int Recvfrom(int socket, void *restrict buffer, size_t length, int flags, struct sockaddr *restrict address, socklen_t *restrict address_len);
int Select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);
int Socket(int domain, int type, int protocol);
ssize_t Write(int fd, const void *buf, size_t count);

#endif