vpnclient_ynh/conf/scripts/route-up.d/99-validate

#!/bin/bash

success() {
  echo "[ OK ] $1"
}

info() {
  echo "[INFO] $1"
}

warn() {
  echo "[WARN] $1" >&2
}

error() {
  echo "[FAIL] $1" >&2
}

critical() {
  echo "[CRIT] $1" >&2
  exit 1
}

echo "[INFO] Validating that VPN is up and the server is connected to internet..."

ipv4=$(ping -w3 -c1 ip.yunohost.org  >/dev/null 2>&1 && curl --max-time 5 https://ip.yunohost.org --silent)
ipv6=$(ping -w3 -c1 ip6.yunohost.org >/dev/null 2>&1 && curl --max-time 5 https://ip6.yunohost.org --silent)

if ip route get 1.2.3.4 | grep -q tun0; then
  if ping -c1 -w5 debian.org >/dev/null; then
    echo "[ OK ] YunoHost VPN client started!"
    echo "[INFO] IPv4 address is $ipv4"
    echo "[INFO] IPv6 address is $ipv6"
  else
    echo "[CRIT] The VPN is up but debian.org cannot be reached, indicating that something is probably misconfigured/blocked." >&2
    exit 1
  fi
else
  echo "[CRIT] IPv4 routes are misconfigured !?" >&2
  exit 1
fi