Write a program using UDP Sockets to enable file transfer (Script, Text, Audio and Video one file each) between two machines.

Write a program using UDP Sockets to enable file transfer (Script, Text, Audio and Video one file each) between two machines.

  11:15 PM    Dnyaneshwar Kudande

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Write a program using UDP Sockets to enable file transfer (Script, Text, Audio and Video
one file each) between two machines. 

//add.txt

High this is Dnyaneshwar

//ft_client.c

#include<stdio.h>

#include<stdlib.h>

#include<sys/socket.h>

#include<sys/types.h>

#include<netinet/in.h>

#include<string.h>

#include<unistd.h>

#include<arpa/inet.h>

#include<error.h>

#define ERROR -1

#define BUFFER 1024

int main(int argc, char **argv)

{

int sock; // client socket descriptor 

struct sockaddr_in remote_server;

char send_data[BUFFER]= "add.txt"; // send buffer: hold information to send to server

char recv_data[BUFFER]; // receive buffer: hold information to received from server

int sockaddr_len = sizeof(struct sockaddr_in); // socket address length

int data_len; // store data length of send_data or recv_data length 

  

if((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1)

{

perror("socket error. ");

exit(-1);

}

remote_server.sin_family = AF_INET; //IPv4

remote_server.sin_port = htons(atoi(argv[2])); //htons: host to network short byte order, atoi: convert a string to an integer

remote_server.sin_addr.s_addr = inet_addr(argv[1]); //inet_addr: function converts the Internet host address cp IPv4 numbers-and-dots notation into binary data in network byte order. 

bzero(&remote_server.sin_zero , 8);// function sets the first 8 bytes of the area starting at &remote_server.sin_zero to zero 

sendto(sock,send_data,sizeof(send_data),0,(struct sockaddr *)&remote_server,sockaddr_len);

data_len = recvfrom(sock,recv_data,BUFFER, 0,(struct sockaddr *)&remote_server,&sockaddr_len);

recv_data[data_len] = '\0';

printf("data received = %s \n", recv_data );

FILE *fp;

fp=fopen("add1.txt","w");

fprintf(fp,"%s",recv_data);

fclose(fp);

close(sock);

return 0;

}

//ft_server.c

#include<stdio.h>

#include<stdlib.h>

#include<sys/socket.h>

#include<sys/types.h>

#include<netinet/in.h>

#include<string.h>

#include<unistd.h>

#include<arpa/inet.h>

#include<error.h>

#define ERROR -1

#define BUFFER 1024

#define MAX_CLIENTS 2

int main(int argc, char **argv)

{

int sock, cli; // sock: server socket descriptor, cli: client socket descriptor

struct sockaddr_in server, client;

char send_data[BUFFER]= "Hello from server mayur"; // send buffer: hold information to send to client

char recv_data[BUFFER]; // receive buffer: hold information to received from client

int sockaddr_len = sizeof(struct sockaddr_in); // socket address length

int data_len; // store data length of send_data or recv_data length   

if((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1)

{

perror("socket error. ");

exit(-1);

}

server.sin_family = AF_INET;

server.sin_port = htons(atoi(argv[1]));

server.sin_addr.s_addr = INADDR_ANY;

bzero(&server.sin_zero , 8);

if((bind(sock, (struct sockaddr *)&server, sockaddr_len)) == -1)

{

perror("bind error");

exit(-1);

}

// recvfrom(listenfd,buff,buffsize,0, (struct sockaddr *) &clientaddr, &sin_size) != buffsize)   

data_len = recvfrom(sock,recv_data,BUFFER, 0,(struct sockaddr *)&client,&sockaddr_len);

printf("New client connected to port: %d and IP %s \n", ntohs(client.sin_port), inet_ntoa(client.sin_addr));

recv_data[data_len] = '\0';

FILE *f;

f=fopen(recv_data,"r");

fgets(send_data,BUFFER,f);

fclose(f);

sendto(sock,send_data,strlen(send_data),0,(struct sockaddr *)&client,sockaddr_len);

printf("data received = %s \n", recv_data );

close(sock);

return 0;

}