mirror of
https://github.com/pivpn/pivpn.git
synced 2024-12-19 03:10:16 +00:00
Detect current netmask, validate user input when configuring a static IP
This commit is contained in:
Orazio
parent
0994ac7d5a
commit
d1a781075a
3 changed files with 92 additions and 46 deletions
|
|
@ -59,9 +59,12 @@ c=$(( columns / 2 ))
|
|||
r=$(( r < 20 ? 20 : r ))
|
||||
c=$(( c < 70 ? 70 : c ))
|
||||
|
||||
# Find IP used to route to outside world
|
||||
CurrentIPv4addr=$(ip route get 192.0.2.1 | awk '{print $7}')
|
||||
# Find IP (with netmask) and gateway used to route to outside world
|
||||
BaseIPv4addr=$(ip route get 192.0.2.1| awk '{print $7}')
|
||||
CurrentIPv4addr=$(ip -o -f inet address | grep "${BaseIPv4addr}/" | awk '{print $4}')
|
||||
CurrentIPv4gw=$(ip route get 192.0.2.1 | awk '{print $3}')
|
||||
|
||||
# Find network interfaces whose state is UP, so as to skip virtual interfaces and the loopback interface
|
||||
availableInterfaces=$(ip -o link | awk '/state UP/ {print $2}' | cut -d':' -f1 | cut -d'@' -f1)
|
||||
|
||||
######## SCRIPT ############
|
||||
|
|
@ -601,7 +604,7 @@ validIP(){
|
|||
if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
|
||||
OIFS=$IFS
|
||||
IFS='.'
|
||||
read -r -a ip <<< "$ip"
|
||||
read -r -a ip <<< "$ip"
|
||||
IFS=$OIFS
|
||||
[[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
|
||||
&& ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
|
||||
|
|
@ -610,6 +613,24 @@ validIP(){
|
|||
return $stat
|
||||
}
|
||||
|
||||
validIPAndNetmask(){
|
||||
local ip=$1
|
||||
local stat=1
|
||||
ip="${ip/\//.}"
|
||||
|
||||
if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,2}$ ]]; then
|
||||
OIFS=$IFS
|
||||
IFS='.'
|
||||
read -r -a ip <<< "$ip"
|
||||
IFS=$OIFS
|
||||
[[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
|
||||
&& ${ip[2]} -le 255 && ${ip[3]} -le 255 \
|
||||
&& ${ip[4]} -le 32 ]]
|
||||
stat=$?
|
||||
fi
|
||||
return $stat
|
||||
}
|
||||
|
||||
getStaticIPv4Settings() {
|
||||
# Grab their current DNS Server
|
||||
IPv4dns=$(grep nameserver /etc/resolv.conf | awk '{print $2}' | xargs)
|
||||
|
|
@ -632,10 +653,10 @@ getStaticIPv4Settings() {
|
|||
if [ "$MISSING_STATIC_IPV4_SETTINGS" -eq 0 ]; then
|
||||
|
||||
# If both settings are not empty, check if they are valid and proceed
|
||||
if validIP "${IPv4addr%/*}"; then
|
||||
if validIPAndNetmask "${IPv4addr}"; then
|
||||
echo "::: Your static IPv4 address: ${IPv4addr}"
|
||||
else
|
||||
echo "::: ${IPv4addr%/*} is not a valid IP address"
|
||||
echo "::: ${IPv4addr} is not a valid IP address"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
|
|
@ -667,22 +688,23 @@ getStaticIPv4Settings() {
|
|||
fi
|
||||
|
||||
echo "dhcpReserv=${dhcpReserv}" >> /tmp/setupVars.conf
|
||||
echo "IPv4addr=${IPv4addr%/*}" >> /tmp/setupVars.conf
|
||||
echo "IPv4addr=${IPv4addr}" >> /tmp/setupVars.conf
|
||||
echo "IPv4gw=${IPv4gw}" >> /tmp/setupVars.conf
|
||||
return
|
||||
fi
|
||||
|
||||
local ipSettingsCorrect
|
||||
local IPv4AddrValid
|
||||
local IPv4gwValid
|
||||
# Some users reserve IP addresses on another DHCP Server or on their routers,
|
||||
# Lets ask them if they want to make any changes to their interfaces.
|
||||
IPv4addr="${CurrentIPv4addr}"
|
||||
IPv4gw="${CurrentIPv4gw}"
|
||||
|
||||
if (whiptail --backtitle "Calibrating network interface" --title "DHCP Reservation" --yesno \
|
||||
"Are you Using DHCP Reservation on your Router/DHCP Server?
|
||||
These are your current Network Settings:
|
||||
|
||||
IP address: ${IPv4addr}
|
||||
Gateway: ${IPv4gw}
|
||||
IP address: ${CurrentIPv4addr}
|
||||
Gateway: ${CurrentIPv4gw}
|
||||
|
||||
Yes: Keep using DHCP reservation
|
||||
No: Setup static IP address
|
||||
|
|
@ -690,56 +712,80 @@ Don't know what DHCP Reservation is? Answer No." ${r} ${c}); then
|
|||
dhcpReserv=1
|
||||
# shellcheck disable=SC2129
|
||||
echo "dhcpReserv=${dhcpReserv}" >> /tmp/setupVars.conf
|
||||
echo "IPv4addr=${IPv4addr%/*}" >> /tmp/setupVars.conf
|
||||
echo "IPv4gw=${IPv4gw}" >> /tmp/setupVars.conf
|
||||
# We don't really need to save them as we won't set a static IP but they might be useful for debugging
|
||||
echo "IPv4addr=${CurrentIPv4addr}" >> /tmp/setupVars.conf
|
||||
echo "IPv4gw=${CurrentIPv4gw}" >> /tmp/setupVars.conf
|
||||
else
|
||||
# Ask if the user wants to use DHCP settings as their static IP
|
||||
if (whiptail --backtitle "Calibrating network interface" --title "Static IP Address" --yesno "Do you want to use your current network settings as a static address?
|
||||
IP address: ${IPv4addr}
|
||||
Gateway: ${IPv4gw}" ${r} ${c}); then
|
||||
|
||||
echo "IPv4addr=${IPv4addr%/*}" >> /tmp/setupVars.conf
|
||||
echo "IPv4gw=${IPv4gw}" >> /tmp/setupVars.conf
|
||||
# If they choose yes, let the user know that the IP address will not be available via DHCP and may cause a conflict.
|
||||
whiptail --msgbox --backtitle "IP information" --title "FYI: IP Conflict" "It is possible your router could still try to assign this IP to a device, which would cause a conflict. But in most cases the router is smart enough to not do that.
|
||||
IP address: ${CurrentIPv4addr}
|
||||
Gateway: ${CurrentIPv4gw}" ${r} ${c}); then
|
||||
IPv4addr=${CurrentIPv4addr}
|
||||
IPv4gw=${CurrentIPv4gw}
|
||||
echo "IPv4addr=${IPv4addr}" >> /tmp/setupVars.conf
|
||||
echo "IPv4gw=${IPv4gw}" >> /tmp/setupVars.conf
|
||||
|
||||
# If they choose yes, let the user know that the IP address will not be available via DHCP and may cause a conflict.
|
||||
whiptail --msgbox --backtitle "IP information" --title "FYI: IP Conflict" "It is possible your router could still try to assign this IP to a device, which would cause a conflict. But in most cases the router is smart enough to not do that.
|
||||
If you are worried, either manually set the address, or modify the DHCP reservation pool so it does not include the IP you want.
|
||||
It is also possible to use a DHCP reservation, but if you are going to do that, you might as well set a static address." ${r} ${c}
|
||||
# Nothing else to do since the variables are already set above
|
||||
# Nothing else to do since the variables are already set above
|
||||
else
|
||||
# Otherwise, we need to ask the user to input their desired settings.
|
||||
# Start by getting the IPv4 address (pre-filling it with info gathered from DHCP)
|
||||
# Start a loop to let the user enter their information with the chance to go back and edit it if necessary
|
||||
# Otherwise, we need to ask the user to input their desired settings.
|
||||
# Start by getting the IPv4 address (pre-filling it with info gathered from DHCP)
|
||||
# Start a loop to let the user enter their information with the chance to go back and edit it if necessary
|
||||
until [[ ${ipSettingsCorrect} = True ]]; do
|
||||
# Ask for the IPv4 address
|
||||
if IPv4addr=$(whiptail --backtitle "Calibrating network interface" --title "IPv4 address" --inputbox "Enter your desired IPv4 address" ${r} ${c} "${IPv4addr}" 3>&1 1>&2 2>&3) ; then
|
||||
echo "::: Your static IPv4 address: ${IPv4addr}"
|
||||
# Ask for the gateway
|
||||
if IPv4gw=$(whiptail --backtitle "Calibrating network interface" --title "IPv4 gateway (router)" --inputbox "Enter your desired IPv4 default gateway" ${r} ${c} "${IPv4gw}" 3>&1 1>&2 2>&3) ; then
|
||||
echo "::: Your static IPv4 gateway: ${IPv4gw}"
|
||||
# Give the user a chance to review their settings before moving on
|
||||
if (whiptail --backtitle "Calibrating network interface" --title "Static IP Address" --yesno "Are these settings correct?
|
||||
IP address: ${IPv4addr}
|
||||
Gateway: ${IPv4gw}" ${r} ${c}); then
|
||||
# If the settings are correct, then we need to set the pivpnIP
|
||||
echo "IPv4addr=${IPv4addr%/*}" >> /tmp/setupVars.conf
|
||||
echo "IPv4gw=${IPv4gw}" >> /tmp/setupVars.conf
|
||||
# After that's done, the loop ends and we move on
|
||||
ipSettingsCorrect=True
|
||||
|
||||
until [[ ${IPv4AddrValid} = True ]]; do
|
||||
# Ask for the IPv4 address
|
||||
if IPv4addr=$(whiptail --backtitle "Calibrating network interface" --title "IPv4 address" --inputbox "Enter your desired IPv4 address" ${r} ${c} "${CurrentIPv4addr}" 3>&1 1>&2 2>&3) ; then
|
||||
if validIPAndNetmask "${IPv4addr}"; then
|
||||
echo "::: Your static IPv4 address: ${IPv4addr}"
|
||||
IPv4AddrValid=True
|
||||
else
|
||||
# If the settings are wrong, the loop continues
|
||||
ipSettingsCorrect=False
|
||||
whiptail --msgbox --backtitle "Calibrating network interface" --title "IPv4 address" "You entered an invalid IPv4 address.\\n\\nPlease enter an IP address in the CIDR notation, example: 192.168.23.211/24.\\n\\nIf you are not sure, please just keep the default." ${r} ${c}
|
||||
echo "::: Invalid IPv4 address: ${IPv4addr}"
|
||||
IPv4AddrValid=False
|
||||
fi
|
||||
else
|
||||
# Cancelling gateway settings window
|
||||
ipSettingsCorrect=False
|
||||
# Cancelling IPv4 settings window
|
||||
echo "::: Cancel selected. Exiting..."
|
||||
exit 1
|
||||
fi
|
||||
done
|
||||
|
||||
until [[ ${IPv4gwValid} = True ]]; do
|
||||
# Ask for the gateway
|
||||
if IPv4gw=$(whiptail --backtitle "Calibrating network interface" --title "IPv4 gateway (router)" --inputbox "Enter your desired IPv4 default gateway" ${r} ${c} "${CurrentIPv4gw}" 3>&1 1>&2 2>&3) ; then
|
||||
if validIP "${IPv4gw}"; then
|
||||
echo "::: Your static IPv4 gateway: ${IPv4gw}"
|
||||
IPv4gwValid=True
|
||||
else
|
||||
whiptail --msgbox --backtitle "Calibrating network interface" --title "IPv4 gateway (router)" "You entered an invalid IPv4 address.\\n\\nPlease enter the IP address of your gateway (router), example: 192.168.23.1.\\n\\nIf you are not sure, please just keep the default." ${r} ${c}
|
||||
echo "::: Invalid IPv4 gateway: ${IPv4gw}"
|
||||
IPv4gwValid=False
|
||||
fi
|
||||
else
|
||||
# Cancelling gateway settings window
|
||||
echo "::: Cancel selected. Exiting..."
|
||||
exit 1
|
||||
fi
|
||||
done
|
||||
|
||||
# Give the user a chance to review their settings before moving on
|
||||
if (whiptail --backtitle "Calibrating network interface" --title "Static IP Address" --yesno "Are these settings correct?
|
||||
|
||||
IP address: ${IPv4addr}
|
||||
Gateway: ${IPv4gw}" ${r} ${c}); then
|
||||
# If the settings are correct, then we need to set the pivpnIP
|
||||
echo "IPv4addr=${IPv4addr}" >> /tmp/setupVars.conf
|
||||
echo "IPv4gw=${IPv4gw}" >> /tmp/setupVars.conf
|
||||
# After that's done, the loop ends and we move on
|
||||
ipSettingsCorrect=True
|
||||
else
|
||||
# Cancelling IPv4 settings window
|
||||
# If the settings are wrong, the loop continues
|
||||
ipSettingsCorrect=False
|
||||
echo "::: Cancel selected. Exiting..."
|
||||
exit 1
|
||||
fi
|
||||
done
|
||||
# End the if statement for DHCP vs. static
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
IPv4dev=eth0
|
||||
IPv4addr=192.168.23.211
|
||||
IPv4addr=192.168.23.211/24
|
||||
IPv4gw=192.168.23.1
|
||||
dhcpReserv=0
|
||||
install_user=pi
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
IPv4dev=eth0
|
||||
IPv4addr=192.168.23.211
|
||||
IPv4addr=192.168.23.211/24
|
||||
IPv4gw=192.168.23.1
|
||||
dhcpReserv=0
|
||||
install_user=pi
|
||||
|
|
|
|||
Loading…
Reference in a new issue