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Verify Custom DNS IP is a valid IP address

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This commit is contained in:
Promofaux 2016-02-20 17:33:20 +00:00
parent 800d2f0859
commit 0ebb7eecdb
1 changed files with 54 additions and 7 deletions
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61
automated install/basic-install.sh
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@ -304,6 +304,23 @@ setStaticIPv4() {
fi
}
function valid_ip()
{
local ip=$1
local stat=1
if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
OIFS=$IFS
IFS='.'
ip=($ip)
IFS=$OIFS
[[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
&& ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
stat=$?
fi
return $stat
}
setDNS(){
DNSChoseCmd=(whiptail --separate-output --radiolist "Select Upstream DNS Provider. To use your own, select Custom." $r $c 6)
DNSChooseOptions=(Google "" on
@ -343,9 +360,16 @@ setDNS(){
Custom)
until [[ $DNSSettingsCorrect = True ]]
do
strInvalid="Invalid"
if [ ! $piholeDNS1 ]; then
prePopulate=""
elif [ $piholeDNS1 ] && [ ! $piholeDNS2 ]; then
if [ ! $piholeDNS2 ]; then
prePopulate=""
else
prePopulate=", $piholeDNS2"
fi
elif [ $piholeDNS1 ] && [ ! $piholeDNS2 ]; then
prePopulate="$piholeDNS1"
elif [ $piholeDNS1 ] && [ $piholeDNS2 ]; then
prePopulate="$piholeDNS1, $piholeDNS2"
@ -355,16 +379,39 @@ setDNS(){
if [[ $? = 0 ]];then
piholeDNS1=$(echo $piholeDNS | sed 's/[, \t]\+/,/g' | awk -F, '{print$1}')
piholeDNS2=$(echo $piholeDNS | sed 's/[, \t]\+/,/g' | awk -F, '{print$2}')
if ! valid_ip $piholeDNS1 || [ ! $piholeDNS1 ]; then
piholeDNS1=$strInvalid
fi
if ! valid_ip $piholeDNS2 && [ $piholeDNS2 ]; then
piholeDNS2=$strInvalid
fi
else
echo "::: Cancel selected, exiting...."
exit 1
fi
if (whiptail --backtitle "Specify Upstream DNS Provider(s)" --title "Upstream DNS Provider(s)" --yesno "Are these settings correct?\n DNS Server 1: $piholeDNS1\n DNS Server 2: $piholeDNS2" $r $c) then
DNSSettingsCorrect=True
else
# If the settings are wrong, the loop continues
if [ $piholeDNS1 == $strInvalid ] || [ $piholeDNS2 == $strInvalid ]; then
whiptail --msgbox --backtitle "Invalid IP" --title "Invalid IP" "One or both entered IP addresses were invalid. Please try again.\n\n DNS Server 1: $piholeDNS1\n DNS Server 2: $piholeDNS2" $r $c
if [ $piholeDNS1 == $strInvalid ]; then
piholeDNS1=""
fi
if [ $piholeDNS2 == $strInvalid ]; then
piholeDNS2=""
fi
DNSSettingsCorrect=False
else
if (whiptail --backtitle "Specify Upstream DNS Provider(s)" --title "Upstream DNS Provider(s)" --yesno "Are these settings correct?\n DNS Server 1: $piholeDNS1\n DNS Server 2: $piholeDNS2" $r $c) then
DNSSettingsCorrect=True
else
# If the settings are wrong, the loop continues
DNSSettingsCorrect=False
fi
fi
done
;;