D. TCP File Transfer Socket Programming in Unix Using C Programming

FILE TRANSFER USING TCP 

SERVER: 


#include<netinet/in.h> 
#include <sys/types.h> 
#include <sys/socket.h> 
#include<stdio.h> 
#include <arpa/inet.h> 
#include <string.h> 
#include<fcntl.h> 
main() 
int sd,cd; 
char buf[1000]="",fname[10]; 
struct sockaddr_in ser; 
sd=socket(AF_INET,SOCK_STREAM,0); 
if(sd<0) 
printf("SOCKET NOT CREATED\n"); 
bzero(&ser,sizeof(struct sockaddr_in)); 
ser.sin_family=AF_INET; 
ser.sin_port=htons(1101); 
inet_aton("localhost",&ser.sin_addr); 
int b=bind(sd,(struct sockaddr *)&ser,sizeof(ser)); 
printf("BIND VALUE:%d\n",b); 
listen(sd,5); 
for(;;) 
{  
cd=accept(sd,NULL,NULL); 
int pid=fork(); 
if(pid==0) 
{  
printf("accept value %d\n",cd); 
read(cd,buf,1000); 
int fd=open(buf,O_RDONLY); 
read(fd,buf,1000); 
write(cd,buf,strlen(buf)); 
printf("MESSAGE FROM CLIENT:%s\n",buf); 
close(cd); 
}
close(sd); 

CLIENT: 


#include<netinet/in.h> 
#include <sys/types.h> 
#include <sys/socket.h> 
#include<stdio.h> 
#include <arpa/inet.h> 
#include <string.h> 
#include<fcntl.h> 
main() 
int sd,cd; 
char buf[1000]="",buf1[1000]=""; 
struct sockaddr_in ser; 
sd=socket(AF_INET,SOCK_STREAM,0); 
if(sd<0) 
printf("SOCKET NOT CREATED\n"); 
bzero(&ser,sizeof(struct sockaddr_in)); 
ser.sin_family=AF_INET; 
ser.sin_port=htons(1101); 
inet_aton("localhost",&ser.sin_addr); 
connect(sd,(struct sockaddr *)&ser,sizeof(ser)); 
for(;;) 
printf("ENTER THE MESSAGE"); 
scanf("%s",buf);  
write(sd,buf,strlen(buf)); 
read(sd,buf,1000); 
printf("RECEIVED FROM SERVER%s\n",buf); 
close(sd); 

OUTPUT: 

SERVER: 

cc udp.c -o udp 
./udp 
BIND VALUE:0 
accept value 4 
MESSAGE FROM CLIENT: 
#include<stdio.h> 
main() 
printf("hello"); 

CLIENT: 

cc ftclient.c -o ftcli 
./ftcli 
ENTER THE MESSAGE 
hello.c 
RECEIVED FROM SERVER
#include<stdio.h> 
main() 
printf("hello");