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pivpn/scripts/self_check.sh
4s3ti 8598013294 Shellcheck compliance
scripts/self_check.sh
  * Fixes SC1090: ShellCheck can't follow non-constant source. Use a directive to specify location.
  * SC2154: <VarName> is referenced but not assigned.
  * Disabled warnings for the mentioned errors as they are sourced externaly and may vary
2021-11-02 17:01:08 +01:00

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#!/bin/bash
# dual protocol, VPN type supplied as $1
VPN=$1
setupVars="/etc/pivpn/${VPN}/setupVars.conf"
ERR=0
if [ ! -f "${setupVars}" ]; then
echo "::: Missing setup vars file!"
exit 1
fi
# SC1090 disabled as setupVars file differs from system to system
# shellcheck disable=SC1090
source "${setupVars}"
if [ "$VPN" = "wireguard" ]; then
VPN_SERVICE="wg-quick@wg0"
VPN_PRETTY_NAME="WireGuard"
elif [ "$VPN" = "openvpn" ]; then
VPN_SERVICE="openvpn"
VPN_PRETTY_NAME="OpenVPN"
fi
if [ "$(</proc/sys/net/ipv4/ip_forward)" -eq 1 ]; then
echo ":: [OK] IP forwarding is enabled"
else
ERR=1
read -r -p ":: [ERR] IP forwarding is not enabled, attempt fix now? [Y/n] " REPLY
if [[ ${REPLY} =~ ^[Yy]$ ]] || [[ -z ${REPLY} ]]; then
sed -i '/net.ipv4.ip_forward=1/s/^#//g' /etc/sysctl.conf
sysctl -p
echo "Done"
fi
fi
if [ "$USING_UFW" -eq 0 ]; then
# Disabled SC Warnings for SC2154, values for variables are sourced from setupVars
# shellcheck disable=SC2154
if iptables -t nat -C POSTROUTING -s "${pivpnNET}/${subnetClass}" -o "${IPv4dev}" -j MASQUERADE -m comment --comment "${VPN}-nat-rule" &> /dev/null; then
echo ":: [OK] Iptables MASQUERADE rule set"
else
ERR=1
read -r -p ":: [ERR] Iptables MASQUERADE rule is not set, attempt fix now? [Y/n] " REPLY
if [[ ${REPLY} =~ ^[Yy]$ ]] || [[ -z ${REPLY} ]]; then
iptables -t nat -I POSTROUTING -s "${pivpnNET}/${subnetClass}" -o "${IPv4dev}" -j MASQUERADE -m comment --comment "${VPN}-nat-rule"
iptables-save > /etc/iptables/rules.v4
echo "Done"
fi
fi
if [ "$INPUT_CHAIN_EDITED" -eq 1 ]; then
# Disabled SC Warnings for SC2154, values for variables are sourced from setupVars
# shellcheck disable=SC2154
if iptables -C INPUT -i "${IPv4dev}" -p "${pivpnPROTO}" --dport "${pivpnPORT}" -j ACCEPT -m comment --comment "${VPN}-input-rule" &> /dev/null; then
echo ":: [OK] Iptables INPUT rule set"
else
ERR=1
read -r -p ":: [ERR] Iptables INPUT rule is not set, attempt fix now? [Y/n] " REPLY
if [[ ${REPLY} =~ ^[Yy]$ ]] || [[ -z ${REPLY} ]]; then
iptables -I INPUT 1 -i "${IPv4dev}" -p "${pivpnPROTO}" --dport "${pivpnPORT}" -j ACCEPT -m comment --comment "${VPN}-input-rule"
iptables-save > /etc/iptables/rules.v4
echo "Done"
fi
fi
fi
if [ "$FORWARD_CHAIN_EDITED" -eq 1 ]; then
# Disabled SC Warnings for SC2154, values for variables are sourced from setupVars
# shellcheck disable=SC2154
if iptables -C FORWARD -s "${pivpnNET}/${subnetClass}" -i "${pivpnDEV}" -o "${IPv4dev}" -j ACCEPT -m comment --comment "${VPN}-forward-rule" &> /dev/null; then
echo ":: [OK] Iptables FORWARD rule set"
else
ERR=1
read -r -p ":: [ERR] Iptables FORWARD rule is not set, attempt fix now? [Y/n] " REPLY
if [[ ${REPLY} =~ ^[Yy]$ ]] || [[ -z ${REPLY} ]]; then
iptables -I FORWARD 1 -d "${pivpnNET}/${subnetClass}" -i "${IPv4dev}" -o "${pivpnDEV}" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -m comment --comment "${VPN}-forward-rule"
iptables -I FORWARD 2 -s "${pivpnNET}/${subnetClass}" -i "${pivpnDEV}" -o "${IPv4dev}" -j ACCEPT -m comment --comment "${VPN}-forward-rule"
iptables-save > /etc/iptables/rules.v4
echo "Done"
fi
fi
fi
else
if LANG="en_US.UTF-8" ufw status | grep -qw 'active'; then
echo ":: [OK] Ufw is enabled"
else
ERR=1
read -r -p ":: [ERR] Ufw is not enabled, try to enable now? [Y/n] " REPLY
if [[ ${REPLY} =~ ^[Yy]$ ]] || [[ -z ${REPLY} ]]; then
ufw enable
fi
fi
if iptables -t nat -C POSTROUTING -s "${pivpnNET}/${subnetClass}" -o "${IPv4dev}" -j MASQUERADE -m comment --comment "${VPN}-nat-rule" &> /dev/null; then
echo ":: [OK] Iptables MASQUERADE rule set"
else
ERR=1
read -r -p ":: [ERR] Iptables MASQUERADE rule is not set, attempt fix now? [Y/n] " REPLY
if [[ ${REPLY} =~ ^[Yy]$ ]] || [[ -z ${REPLY} ]]; then
sed "/delete these required/i *nat\n:POSTROUTING ACCEPT [0:0]\n-I POSTROUTING -s ${pivpnNET}/${subnetClass} -o ${IPv4dev} -j MASQUERADE -m comment --comment ${VPN}-nat-rule\nCOMMIT\n" -i /etc/ufw/before.rules
ufw reload
echo "Done"
fi
fi
if iptables -C ufw-user-input -p "${pivpnPROTO}" --dport "${pivpnPORT}" -j ACCEPT &> /dev/null; then
echo ":: [OK] Ufw input rule set"
else
ERR=1
read -r -p ":: [ERR] Ufw input rule is not set, attempt fix now? [Y/n] " REPLY
if [[ ${REPLY} =~ ^[Yy]$ ]] || [[ -z ${REPLY} ]]; then
ufw insert 1 allow "${pivpnPORT}"/"${pivpnPROTO}"
ufw reload
echo "Done"
fi
fi
if iptables -C ufw-user-forward -i "${pivpnDEV}" -o "${IPv4dev}" -s "${pivpnNET}/${subnetClass}" -j ACCEPT &> /dev/null; then
echo ":: [OK] Ufw forwarding rule set"
else
ERR=1
read -r -p ":: [ERR] Ufw forwarding rule is not set, attempt fix now? [Y/n] " REPLY
if [[ ${REPLY} =~ ^[Yy]$ ]] || [[ -z ${REPLY} ]]; then
ufw route insert 1 allow in on "${pivpnDEV}" from "${pivpnNET}/${subnetClass}" out on "${IPv4dev}" to any
ufw reload
echo "Done"
fi
fi
fi
if systemctl is-active -q "${VPN_SERVICE}"; then
echo ":: [OK] ${VPN_PRETTY_NAME} is running"
else
ERR=1
read -r -p ":: [ERR] ${VPN_PRETTY_NAME} is not running, try to start now? [Y/n] " REPLY
if [[ ${REPLY} =~ ^[Yy]$ ]] || [[ -z ${REPLY} ]]; then
systemctl start "${VPN_SERVICE}"
echo "Done"
fi
fi
if systemctl is-enabled -q "${VPN_SERVICE}"; then
echo ":: [OK] ${VPN_PRETTY_NAME} is enabled (it will automatically start on reboot)"
else
ERR=1
read -r -p ":: [ERR] ${VPN_PRETTY_NAME} is not enabled, try to enable now? [Y/n] " REPLY
if [[ ${REPLY} =~ ^[Yy]$ ]] || [[ -z ${REPLY} ]]; then
systemctl enable "${VPN_SERVICE}"
echo "Done"
fi
fi
# grep -w (whole word) is used so port 11940 won't match when looking for 1194
if netstat -antu | grep -wqE "${pivpnPROTO}.*${pivpnPORT}"; then
echo ":: [OK] ${VPN_PRETTY_NAME} is listening on port ${pivpnPORT}/${pivpnPROTO}"
else
ERR=1
read -r -p ":: [ERR] ${VPN_PRETTY_NAME} is not listening, try to restart now? [Y/n] " REPLY
if [[ ${REPLY} =~ ^[Yy]$ ]] || [[ -z ${REPLY} ]]; then
systemctl restart "${VPN_SERVICE}"
echo "Done"
fi
fi
if [ "$ERR" -eq 1 ]; then
echo -e "[INFO] Run \e[1mpivpn -d\e[0m again to see if we detect issues"
fi