CRC Implementation with Socket - Client

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <unistd.h>

#include <arpa/inet.h>

#include "crc_generator.c"

#define MAX_BUFF 80

#define MAX_KEY 20

#define SA struct sockaddr

#define RESET(buff) \

for (int i = 0; i < 100; i++) \

buff[i] = '\0';

void error(const char *msg)

{

perror(msg);

exit(1);

}

void readIndefinitely(int connfd)

{

char buffer[MAX_BUFF],key[MAX_KEY],key1[MAX_KEY];

int n;

// Clear the buffer

RESET(buffer)

RESET(key)

//Get the data

printf("Get the data : ");

gets(buffer);

printf("Get the key : ");

gets(key);

strcpy(key1,key);

write(connfd,getcrcmessage(buffer,key),sizeof(buffer));

write(connfd,key1,sizeof(key1));

}

int main(int argc, char const *argv[])

{

int sockfd;

struct sockaddr_in serv_addr;

// Checking the provided port no

if (argc < 3)

error("Port No not provided");

serv_addr.sin_family = AF_INET;

serv_addr.sin_addr.s_addr = inet_addr(argv[1]);

serv_addr.sin_port = htons(atoi(argv[2]));

// Socket

if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)

error("Error in Socket");

// Connect

if (connect(sockfd, (SA *)&serv_addr, sizeof(serv_addr)) < 0)

error("Error in Connecting to server ..");

// sending the data

readIndefinitely(sockfd);

close(sockfd);

return 0;

}