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FTP SOCKETS (SERVER & CLIENT) USING C


SERVER
#include<stdio.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<string.h>
#include<stdlib.h>
int main()
{
FILE *fp;
int sd,newsd,ser,n,a,cli,pid,bd,port,clilen;
char name[100],fileread[100],fname[100],ch,file[100],rcv[100];
struct sockaddr_in servaddr,cliaddr;
printf("Enter the port address\n");
scanf("%d",&port);
sd=socket(AF_INET,SOCK_STREAM,0);
if(sd<0)
printf("Cant create\n");
else
printf("Socket is created\n");
servaddr.sin_family=AF_INET;
servaddr.sin_addr.s_addr=htonl(INADDR_ANY);
servaddr.sin_port=htons(port);
a=sizeof(servaddr);
bd=bind(sd,(struct sockaddr *)&servaddr,a);
if(bd<0)
printf("Cant bind\n");
else
printf("Binded\n");
listen(sd,5);
clilen=sizeof(cliaddr);
newsd=accept(sd,(struct sockaddr *)&cliaddr,&clilen);
if(newsd<0)
{
printf("Cant accept\n");
}
else
printf("Accepted\n");
n=recv(newsd,rcv,100,0);
rcv[n]='\0';
fp=fopen(rcv,"r");
if(fp==NULL)
{
send(newsd,"error",5,0);
close(newsd);
}
else
{
while(fgets(fileread,sizeof(fileread),fp))
{
if(send(newsd,fileread,sizeof(fileread),0)<0)
{
printf("Cant send\n");
}
sleep(1);
}
if(!fgets(fileread,si zeof(fileread),fp))
{
send(newsd,"completed",999999999,0);
}
return(0);
}
}




CLIENT
#include<stdio.h>
#include<stdlib.h>
#include<sys/socket.h>
#include<netinet/in.h>
int main()
{
FILE *fp;
int csd,n,ser,s,cli,cport,newsd;
char name[100],rcvmsg[100],rcvg[100],fname[100];
struct sockaddr_in servaddr;
printf("Enter the port");
scanf("%d",&cport);
csd=socket(AF_INET,SOCK_STREAM,0);
if(csd<0)
{
printf("Error....\n");
exit(0);
}
else
printf("Socket is created\n");
servaddr.sin_family=AF_INET;
servaddr.sin_addr.s_addr=htonl(INADDR_ANY);
servaddr.sin_port=htons(cport);
if(connect(csd,(struct sockaddr *)&servaddr,sizeof(servaddr))<0)
printf("Error in connection\n");
else
printf("connected\n");
printf("Enter the existing file name\t");
scanf("%s",name);
printf("Enter the new file name\t");
scanf("%s",fname);
fp=fopen(fname,"w");
send(csd,name,sizeof(name),0);
while(1)
{
s=recv(csd,rcvg,100,0);
rcvg[s]='\0';
if(strcmp(rcvg,"error")==0)
printf("File is not available\n");
if(strcmp(rcvg,"completed")==0)
{
printf("File is transferred........\n");
fclose(fp);
close(csd);
break;
}
else
fputs(rcvg,stdout);
fprintf(fp,"%s",rcvg);
}
}















OUTPUT
SERVER SIDE
$ cc ftpserver.c
$ ./a.out
Enter the port address 2100
Socket is created
Binded
Accepted
$

CLIENT SIDE
$ cc ftpclient.c
$ ./a.out
Enter the port2100
Socket is created
connected
Enter the existing file name savee.txt
Enter the new file name savee1.txt
Saveetha Engineering College Welcomes you!
File is transferred........
$

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