fs1.cpp

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

int main(){

int ssock,csock;       // creating server and clinet socket discriptor

unsigned int len;

struct sockaddr_in server,client;   // creating server & client socket object

if((ssock=socket(AF_INET,SOCK_STREAM,0))==-1){
	perror("socket: is not created");
	exit(-1);
}

server.sin_family=AF_INET;
server.sin_port=htons(10000);       // initializing server socket parameters..
server.sin_addr.s_addr=INADDR_ANY;
//inet_addr("127.0.0.1");
bzero(&server.sin_zero,0); //appending 8 byte zeroes to 'struct sockaddr_in', to make it equal in size with 'struct sockaddr'.. 


len=sizeof(struct sockaddr_in);

if((bind(ssock,(struct sockaddr *)&server,len))==-1){  // binding port & IP  
	perror("bind: ");
	exit(-1);
}

if((listen(ssock,5))==-1){     // listening for client
	perror("listen: ");                     
	exit(-1);
}


if((csock=accept(ssock,(struct sockaddr *)&client,&len))==-1){  // accepting connectn
	perror("accept: ");                         
	exit(-1);
}
char buffer[255];
FILE *fp;
int ch = 0;
fp = fopen("received.txt","a");
int words;

read(csock,&words,sizeof(int));

while(ch!=words)
{
	read(csock,buffer,255);
	fprintf(fp,"%s ",buffer);
	ch++;
}

printf("The file has been received successfully and Saved\n");

close(ssock);
return 0;
}