Client file

mdSenderClient

#!/bin/bash

#SERVER FILE

#Copyright 2013 Ricard Solé

#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation, either version 3 of the License, or
#(at your option) any later version.

#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.
#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <http://www.gnu.org/licenses/>.

file_send()
{
	while true; do
		SENT="successful"
		nc -vv $IPserver 8080 < $1 2>log
		log=`cat log`
		if echo $log | grep -q "succeeded!" ; then
			echo "Connection established."
			break
		fi 
		echo "Couldn't stablish connection. Retrying."
	done
}

checkOK()
{
	echo "WAITING FOR OK"
	nc -vv -l 8081 > keepgoing
	go=`cat keepgoing`
	if [ "$go" == "KO" ];then
		echo "FILE ERROR."
		echo "Abortando conexión."
		exit 1
	fi
	echo "OK RECEIVED"
}

pingfun()
{
	echo "PROVIDING SERVER WITH OUR IP"
	echo $myIP > myIP
	file_send myIP
	echo "IP HAS BEEN SERVED"
	echo "ping" > pingfile
	echo "SENDING PING"
	file_send pingfile
	echo "PING SENT OK"

	echo "WAITING FOR PONG"
	nc -vv -l 8081 > pongfile
	pongfile=`cat pongfile`

	if [ "$pongfile" == "pong" ]; then
		echo "PONG RECEIVED OK"
		break
	else
		echo "Couldn't stablish connection. Retrying. Press Ctrl-C to exit."
	fi
}

#Displays GNU GPL
echo ""
echo "===================================================================="
echo "||CLIENT.sh Copyright (C) 2013 Ricard Solé                        ||"
echo "||This program comes with ABSOLUTELY NO WARRANTY;                 ||"
echo "||This is free software, and you are welcome to redistribute it   ||"
echo "||under certain conditions.                                       ||"
echo "===================================================================="
echo ""

#sets up IP address
echo "Which one is your IP?"
/sbin/ifconfig | grep inet | cut -d ' ' -f 12 | cut -d ':' -f 2
read myIP

#asks for the filename
echo "Introduce nombre del archivo: "
read archivo

#checks for the file
if [ ! -e $archivo ]; then
	echo "No existe el archivo."
	exit 1;
fi

#asks for IP and PORT
echo "IP Server: "
read IPserver

#sends ping
pingfun

#creates variable with original MD5
md5sumfile=`cat $archivo | md5sum | cut -d ' ' -f 1`
echo "$md5sumfile" | cut -d ' ' -f 1 > md5sumfile

#asks for output name and checks size
echo "Introduce el nombre de los ficheros fraccionados (se le sumará \"a\",\"b\"... al final) : "
read output
filesize=$(stat -c%s "$archivo")

#sends md5sum to server
echo "SENDING MD5 SUM"
file_send md5sumfile $IPserver
echo "MD5SUM SENT OK"

#checks whether file is greater than 1024k
if [ $filesize -gt 1048576 ]; then
	split $archivo -b 1024k $output

	#checks for the total number of files
	totalfiles=`ls | grep $output | wc -l`
	count=1
	echo "$totalfiles" > totalfiles

	#sends total number of files
	echo "SENDING TOTALFILES"
	file_send totalfiles $IPserver
	echo "TOTALFILES SENT OK"
	LIST=`ls | grep $output`

	#starts sending file
	for i in $LIST; do
		echo "SENDING FILE"
		file_send $i $IPserver
		echo "FILE $i SENT"

		#sends a count
		echo "SENDING COUNT"
		echo "$count" > count
		file_send count $IPserver
		echo "Enviando archivo: $count/$totalfiles"
		count=$((count + 1))
		echo "COUNT SENT OK"

		#sends individual md5
		md5sumi=`cat $i | md5sum | cut -d ' ' -f 1`
		echo $md5sumi > md5sumi
		echo "SENDING INDIVIDUAL MD5"
		file_send md5sumi $IPserver
		echo "INDIVIDUAL MD5 SENT OK"

		#checks OK or KO
		checkOK

	done

else
	totalfiles=`ls | $output* | wc -l`
	nc $IPserver $PORTserver < totalfiles
	sleep $delay
	nc $IPserver $PORTserver < $archivo
	sleep $delay
	echo "Enviando $archivo"
	nc $IPserver $PORTserver < count
	sleep $delay
	nc $IPserver $PORTserver < md5sumfile
	sleep $delay
fi

endcommand="FINISH"
echo "$endcommand" > endcommand
file_send endcommand $IPserver


echo "transferencia finalizada, borrando archivos temporales"

rm endcommand count md5sumfile totalfiles md5sumi $output* log keepgoing pingfile pongfile myIP

echo "archivos temporales borrados"