665 lines
18 KiB
Bash
Executable File
665 lines
18 KiB
Bash
Executable File
#!/bin/bash
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# Cistech VPN Connection Script with OpenConnect-SSO
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# Usage: ./openconnect-vpn [-c|--connect] [-d|--disconnect] [-m|--menu] [-r|--routes] [-s|--status] [--help]
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#
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# Options:
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# -c, --connect Connect to VPN and exit
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# -d, --disconnect Disconnect VPN and exit
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# -m, --menu Skip auto-connect, show menu directly
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# -r, --routes Show routing table and exit
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# -s, --status Show VPN status and exit
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# --help Show this help message
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# Credentials from environment variables (set by runtipi)
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VPN_EMAIL="${VPN_EMAIL:-}"
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VPN_PASSWORD="${VPN_PASSWORD:-}"
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VPN_TOTP_SECRET="${VPN_TOTP_SECRET:-}"
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VPN_HOST="${VPN_HOST:-}"
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TARGET_IP="${TARGET_IP:-10.3.1.0}"
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TARGET_SUBNET="$(echo "$TARGET_IP" | cut -d. -f1-3).0/24"
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VPN_INTERFACE="${VPN_INTERFACE:-tun0}"
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CONTAINER_NETWORK="172.30.0.0/24"
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# Hardcoded test host (IBM i server)
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IBMI_HOST="10.3.1.201"
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# Log directory
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LOG_DIR="/var/log/openconnect-vpn"
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LOG_RETENTION_DAYS=7
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mkdir -p "$LOG_DIR" 2>/dev/null
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get_log_file() {
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echo "$LOG_DIR/$(date '+%Y-%m-%d').log"
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}
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cleanup_old_logs() {
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find "$LOG_DIR" -name "*.log" -type f -mtime +$LOG_RETENTION_DAYS -delete 2>/dev/null
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}
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# Colors
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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CYAN='\033[0;36m'
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GRAY='\033[0;90m'
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NC='\033[0m'
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print_banner() {
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echo -e "${CYAN}========================================${NC}"
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echo -e "${CYAN} Cistech VPN Connection Script ${NC}"
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echo -e "${CYAN}========================================${NC}"
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echo ""
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}
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# Flags
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SKIP_AUTO_CONNECT=false
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DO_CONNECT=false
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DO_DISCONNECT=false
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# Logging
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log() {
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local level="$1"
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local msg="$2"
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local timestamp=$(date '+%Y-%m-%d %H:%M:%S')
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local timestamp_short=$(date '+%H:%M:%S')
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local log_file=$(get_log_file)
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local msg_plain=$(echo -e "$msg" | sed 's/\x1b\[[0-9;]*m//g')
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echo "[$timestamp] [$level] $msg_plain" >> "$log_file"
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case $level in
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INFO) echo -e "${GRAY}[$timestamp_short]${NC} ${GREEN}[INFO]${NC} $msg" ;;
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WARN) echo -e "${GRAY}[$timestamp_short]${NC} ${YELLOW}[WARN]${NC} $msg" ;;
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ERROR) echo -e "${GRAY}[$timestamp_short]${NC} ${RED}[ERROR]${NC} $msg" ;;
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DEBUG) echo -e "${GRAY}[$timestamp_short]${NC} ${CYAN}[DEBUG]${NC} $msg" ;;
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CMD) echo -e "${GRAY}[$timestamp_short]${NC} ${GRAY}[CMD]${NC} $msg" ;;
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*) echo -e "${GRAY}[$timestamp_short]${NC} $msg" ;;
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esac
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}
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run_cmd() {
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local desc="$1"
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shift
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log CMD "$desc: $*"
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output=$("$@" 2>&1)
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local rc=$?
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if [ -n "$output" ]; then
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echo "$output" | while IFS= read -r line; do
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echo -e " ${GRAY}│${NC} $line"
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done
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fi
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return $rc
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}
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show_help() {
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echo -e "${CYAN}Cistech VPN Connection Script${NC}"
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echo ""
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echo "Usage: $0 [OPTIONS]"
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echo ""
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echo "Options:"
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echo " -c, --connect Connect to VPN and exit"
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echo " -d, --disconnect Disconnect VPN and exit"
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echo " -m, --menu Skip auto-connect, show menu directly"
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echo " -r, --routes Show routing table and exit"
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echo " -s, --status Show VPN status and exit"
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echo " --help Show this help message"
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echo ""
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echo "Menu Options:"
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echo " 1 - Connect VPN"
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echo " 2 - Disconnect VPN"
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echo " 3 - Show VPN status"
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echo " 4 - Setup IP forwarding"
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echo " 5 - Test connection"
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echo " 6 - Show network status"
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echo " 7 - Show routing table"
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echo " 8 - Show live TOTP"
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echo " q - Quit"
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}
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# Fetch server certificate fingerprint
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get_server_cert() {
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local host="$1"
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local server=$(echo "$host" | sed -E 's|^https?://||; s|/.*$||')
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[[ "$server" != *:* ]] && server="${server}:443"
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log DEBUG "Fetching server certificate from $server..."
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local cert_pin=$(echo | openssl s_client -connect "$server" 2>/dev/null \
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| openssl x509 -pubkey -noout 2>/dev/null \
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| openssl pkey -pubin -outform der 2>/dev/null \
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| openssl dgst -sha256 -binary \
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| openssl enc -base64)
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if [[ -n "$cert_pin" ]]; then
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echo "pin-sha256:${cert_pin}"
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else
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log WARN "Could not fetch server certificate"
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echo ""
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fi
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}
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# Setup keyring with credentials
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setup_keyring() {
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log INFO "Setting up keyring credentials..."
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if [[ -z "$VPN_EMAIL" ]]; then
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log ERROR "VPN_EMAIL is not set"
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return 1
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fi
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python3 << PYTHON
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import keyring
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from keyrings.alt.file import PlaintextKeyring
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keyring.set_keyring(PlaintextKeyring())
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email = "$VPN_EMAIL"
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password = "$VPN_PASSWORD"
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totp_secret = "$VPN_TOTP_SECRET"
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if password:
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keyring.set_password('openconnect-sso', email, password)
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print(f"Password stored in keyring for {email}")
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if totp_secret:
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keyring.set_password('openconnect-sso', f'totp/{email}', totp_secret.upper())
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print(f"TOTP secret stored in keyring for {email}")
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print("Keyring setup complete")
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PYTHON
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if [ $? -eq 0 ]; then
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log INFO "Keyring credentials configured"
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else
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log ERROR "Failed to setup keyring"
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return 1
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fi
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}
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get_totp() {
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oathtool --totp -b "$VPN_TOTP_SECRET"
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}
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# Test connection to IBMI_HOST
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test_connection() {
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if [[ -z "$IBMI_HOST" ]]; then
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log WARN "IBMI_HOST not set"
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return 1
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fi
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log INFO "Testing connection to $IBMI_HOST..."
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if ping -c 3 -W 3 "$IBMI_HOST" &>/dev/null; then
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log INFO "Connection test: ${GREEN}SUCCESS${NC}"
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return 0
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else
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log WARN "Connection test: ${RED}FAILED${NC} (may need manual route on host)"
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return 1
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fi
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}
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show_totp() {
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log INFO "Starting live TOTP display (Ctrl+C to stop)"
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echo ""
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while true; do
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TOTP=$(get_totp)
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SECONDS_LEFT=$((30 - ($(date +%s) % 30)))
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echo -ne "\r ${CYAN}Current TOTP:${NC} ${GREEN}$TOTP${NC} (expires in ${YELLOW}${SECONDS_LEFT}s${NC}) "
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sleep 1
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done
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}
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get_vpn_interface() {
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local iface=$(ip link show | grep -oP 'tun\d+(?=:.*UP)' | head -1)
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if [ -z "$iface" ]; then
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iface=$(ip link show | grep -oP 'tun\d+' | head -1)
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fi
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echo "$iface"
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}
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get_container_ip() {
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ip addr show eth0 2>/dev/null | grep -oP 'inet \K[\d.]+' | head -1
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}
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get_vpn_ip() {
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local iface=$(get_vpn_interface)
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if [ -n "$iface" ]; then
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ip addr show "$iface" 2>/dev/null | grep -oP 'inet \K[\d.]+' | head -1
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fi
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}
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check_vpn_status() {
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local vpn_iface=$(get_vpn_interface)
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if [ -n "$vpn_iface" ]; then
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local vpn_ip=$(get_vpn_ip)
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log INFO "VPN is ${GREEN}CONNECTED${NC}"
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log DEBUG " Interface: $vpn_iface"
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log DEBUG " VPN IP: $vpn_ip"
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return 0
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else
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log WARN "VPN is ${RED}NOT CONNECTED${NC}"
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return 1
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fi
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}
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show_routes() {
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echo -e "${CYAN}========================================${NC}"
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echo -e "${CYAN} Current Routing Table ${NC}"
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echo -e "${CYAN}========================================${NC}"
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echo ""
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echo -e "${GREEN}IPv4 Routes:${NC}"
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ip -4 route show | while IFS= read -r line; do
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if echo "$line" | grep -qE "tun[0-9]"; then
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echo -e " ${YELLOW}$line${NC}"
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elif echo "$line" | grep -qE "10\.|172\.(1[6-9]|2[0-9]|3[01])\.|192\.168\."; then
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echo -e " ${CYAN}$line${NC}"
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else
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echo " $line"
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fi
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done
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echo ""
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echo -e "${GREEN}VPN Interface:${NC}"
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local vpn_iface=$(get_vpn_interface)
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if [ -n "$vpn_iface" ]; then
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ip addr show "$vpn_iface" 2>/dev/null | grep -E "inet|link" | while IFS= read -r line; do
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echo " $line"
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done
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else
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echo -e " ${RED}No VPN interface found${NC}"
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fi
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}
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show_network_status() {
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log INFO "Current network status:"
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echo ""
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log DEBUG "Container Network Interfaces:"
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ip -4 addr show | grep -E "inet |^[0-9]+:" | while IFS= read -r line; do
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echo -e " ${GRAY}│${NC} $line"
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done
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echo ""
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local vpn_iface=$(get_vpn_interface)
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if [ -n "$vpn_iface" ]; then
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local vpn_ip=$(get_vpn_ip)
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log INFO "VPN Status: ${GREEN}CONNECTED${NC}"
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log DEBUG " Interface: $vpn_iface"
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log DEBUG " VPN IP: $vpn_ip"
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else
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log WARN "VPN Status: ${RED}NOT CONNECTED${NC}"
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fi
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local container_ip=$(get_container_ip)
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if [ -n "$container_ip" ]; then
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log DEBUG "Container IP: $container_ip"
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fi
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echo ""
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log DEBUG "Default gateway:"
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ip route show default | while IFS= read -r line; do
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echo -e " ${GRAY}│${NC} $line"
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done
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echo ""
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}
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kill_vpn_processes() {
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log INFO "Killing VPN processes..."
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local killed=0
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for pid in $(pgrep -x "openconnect" 2>/dev/null); do
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log DEBUG "Killing openconnect (PID $pid)"
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kill -9 "$pid" 2>/dev/null && ((killed++))
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done
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for pid in $(pgrep -f "openconnect-sso" 2>/dev/null); do
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log DEBUG "Killing openconnect-sso (PID $pid)"
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kill -9 "$pid" 2>/dev/null && ((killed++))
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done
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if [ $killed -eq 0 ]; then
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log INFO "No VPN processes were running"
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else
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log INFO "Killed $killed process(es)"
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sleep 2
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fi
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}
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disconnect_vpn() {
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log INFO "Disconnecting VPN..."
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kill_vpn_processes
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if check_vpn_status; then
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log WARN "VPN still appears connected"
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return 1
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fi
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log INFO "VPN disconnected"
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return 0
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}
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setup_forwarding() {
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log INFO "Setting up IP forwarding rules for $TARGET_SUBNET..."
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local vpn_iface=$(get_vpn_interface)
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if [ -z "$vpn_iface" ]; then
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log ERROR "No VPN interface found! Is VPN connected?"
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return 1
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fi
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local vpn_ip=$(get_vpn_ip)
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local container_ip=$(get_container_ip)
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log DEBUG "VPN interface: $vpn_iface"
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log DEBUG "VPN IP: $vpn_ip"
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log DEBUG "Container IP: $container_ip"
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# Enable IP forwarding
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run_cmd "Enabling IP forwarding" sysctl -w net.ipv4.ip_forward=1
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# NAT masquerade for container network going through VPN
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if ! iptables -t nat -C POSTROUTING -s "$CONTAINER_NETWORK" -o "$vpn_iface" -j MASQUERADE 2>/dev/null; then
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run_cmd "Adding NAT masquerade for container network -> VPN" iptables -t nat -A POSTROUTING -s "$CONTAINER_NETWORK" -o "$vpn_iface" -j MASQUERADE
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else
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log DEBUG "NAT masquerade for container network already exists"
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fi
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# Forward rules at position 1
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iptables -D FORWARD -d "$TARGET_SUBNET" -j ACCEPT 2>/dev/null || true
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iptables -D FORWARD -s "$TARGET_SUBNET" -j ACCEPT 2>/dev/null || true
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iptables -D FORWARD -s "$CONTAINER_NETWORK" -j ACCEPT 2>/dev/null || true
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iptables -D FORWARD -d "$CONTAINER_NETWORK" -j ACCEPT 2>/dev/null || true
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run_cmd "Inserting forward rule (to container network)" iptables -I FORWARD 1 -d "$CONTAINER_NETWORK" -j ACCEPT
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run_cmd "Inserting forward rule (from container network)" iptables -I FORWARD 1 -s "$CONTAINER_NETWORK" -j ACCEPT
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run_cmd "Inserting forward rule (from target)" iptables -I FORWARD 1 -s "$TARGET_SUBNET" -j ACCEPT
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run_cmd "Inserting forward rule (to target)" iptables -I FORWARD 1 -d "$TARGET_SUBNET" -j ACCEPT
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log INFO "Forwarding rules configured"
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echo ""
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# Trigger host routing service restart
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log INFO "Triggering host routing service restart..."
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touch /runtime/restart-routing 2>/dev/null || true
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sleep 2
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if [ ! -f /runtime/restart-routing ]; then
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log INFO "Host routing service restarted"
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else
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log WARN "Host watcher may not be running (trigger file still exists)"
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fi
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log INFO "Routing configured for $TARGET_SUBNET through VPN tunnel"
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echo ""
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}
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connect_vpn() {
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log INFO "=== Starting OpenConnect-SSO VPN ==="
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echo ""
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# Kill any existing VPN processes
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kill_vpn_processes
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# Reset DNS to public servers (VPN script may have overwritten it)
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log DEBUG "Resetting DNS to public servers..."
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echo "nameserver 8.8.8.8" > /etc/resolv.conf
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echo "nameserver 1.1.1.1" >> /etc/resolv.conf
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# Clean up stale tun interface
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ip link delete tun0 2>/dev/null || true
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# Validate required variables
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if [[ -z "$VPN_HOST" ]]; then
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log ERROR "VPN_HOST is not set"
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return 1
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fi
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# Setup keyring credentials
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setup_keyring
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# Fetch server certificate
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log INFO "Fetching server certificate..."
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local servercert=$(get_server_cert "$VPN_HOST")
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log INFO "Connecting to: $VPN_HOST"
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log DEBUG "Interface: $VPN_INTERFACE"
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# Build openconnect-sso command
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local sso_args=()
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sso_args+=("-s" "$VPN_HOST")
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if [[ -n "$VPN_EMAIL" ]]; then
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sso_args+=("-u" "$VPN_EMAIL")
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fi
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# Use hidden browser for automated login
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sso_args+=("--browser-display-mode" "hidden")
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# Build openconnect args
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local oc_args=()
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oc_args+=("--protocol=anyconnect")
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oc_args+=("--interface" "$VPN_INTERFACE")
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oc_args+=("--script" "/usr/share/vpnc-scripts/vpnc-script")
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if [[ -n "$servercert" ]]; then
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oc_args+=("--servercert" "$servercert")
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log DEBUG "Server cert: $servercert"
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fi
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# Launch openconnect-sso
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log INFO "Launching openconnect-sso..."
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openconnect-sso "${sso_args[@]}" -- /usr/sbin/openconnect "${oc_args[@]}" &
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OC_PID=$!
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disown $OC_PID
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log DEBUG "openconnect-sso started with PID $OC_PID"
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# Wait for VPN to connect
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log INFO "Waiting for VPN connection..."
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local wait_count=0
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local max_wait=300
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while [ -z "$(get_vpn_interface)" ]; do
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sleep 2
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((wait_count+=2))
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if [ $((wait_count % 10)) -eq 0 ]; then
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log DEBUG "Still waiting for VPN... (${wait_count}s)"
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fi
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if [ $wait_count -ge $max_wait ]; then
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log ERROR "Timeout waiting for VPN connection after ${max_wait}s"
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return 1
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fi
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done
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log INFO "VPN connected!"
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local vpn_iface=$(get_vpn_interface)
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local vpn_ip=$(get_vpn_ip)
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log DEBUG " Interface: $vpn_iface"
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log DEBUG " VPN IP: $vpn_ip"
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# Wait for routes to stabilize
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log DEBUG "Waiting for routes to stabilize..."
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sleep 3
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# Setup forwarding
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setup_forwarding
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# Test connection to IBMI host
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test_connection
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# Disable screen blanking
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xset s off 2>/dev/null || true
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xset -dpms 2>/dev/null || true
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xset s noblank 2>/dev/null || true
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log DEBUG "Screen blanking disabled"
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log INFO "VPN setup complete"
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# Start watchdog in background
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start_watchdog &
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WATCHDOG_PID=$!
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log DEBUG "Watchdog started with PID $WATCHDOG_PID"
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return 0
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}
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# Watchdog - monitors VPN and reconnects if dropped
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start_watchdog() {
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log INFO "Starting VPN watchdog (check every 60s, keepalive ping every 5min)..."
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local check_interval=60
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local keepalive_interval=300
|
|
local last_keepalive=0
|
|
local reconnect_attempts=0
|
|
local max_reconnect_attempts=3
|
|
|
|
while true; do
|
|
sleep $check_interval
|
|
|
|
local now=$(date +%s)
|
|
local vpn_iface=$(get_vpn_interface)
|
|
|
|
if [ -n "$vpn_iface" ]; then
|
|
# VPN is up
|
|
reconnect_attempts=0
|
|
|
|
# Keepalive ping every 5 minutes
|
|
if [ $((now - last_keepalive)) -ge $keepalive_interval ]; then
|
|
test_connection || log WARN "VPN may be degraded"
|
|
last_keepalive=$now
|
|
fi
|
|
else
|
|
# VPN is down
|
|
((reconnect_attempts++))
|
|
log WARN "VPN disconnected! Reconnect attempt $reconnect_attempts/$max_reconnect_attempts..."
|
|
|
|
if [ $reconnect_attempts -le $max_reconnect_attempts ]; then
|
|
connect_vpn
|
|
else
|
|
log ERROR "Max reconnect attempts reached. Manual intervention required."
|
|
sleep 300
|
|
reconnect_attempts=0
|
|
fi
|
|
fi
|
|
done
|
|
}
|
|
|
|
# Main menu
|
|
main_menu() {
|
|
echo -e "${GREEN}Options:${NC}"
|
|
echo -e " ${CYAN}1${NC} - Connect VPN"
|
|
echo -e " ${CYAN}2${NC} - Disconnect VPN"
|
|
echo -e " ${CYAN}3${NC} - Show VPN status"
|
|
echo -e " ${CYAN}4${NC} - Setup IP forwarding only"
|
|
echo -e " ${CYAN}5${NC} - Test connection to $IBMI_HOST"
|
|
echo -e " ${CYAN}6${NC} - Show network status"
|
|
echo -e " ${CYAN}7${NC} - Show routing table"
|
|
echo -e " ${CYAN}8${NC} - Show live TOTP"
|
|
echo -e " ${CYAN}q${NC} - Quit"
|
|
echo ""
|
|
}
|
|
|
|
parse_args() {
|
|
while [[ $# -gt 0 ]]; do
|
|
case $1 in
|
|
-c|--connect)
|
|
DO_CONNECT=true
|
|
shift
|
|
;;
|
|
-d|--disconnect)
|
|
DO_DISCONNECT=true
|
|
shift
|
|
;;
|
|
-m|--menu)
|
|
SKIP_AUTO_CONNECT=true
|
|
shift
|
|
;;
|
|
-s|--status)
|
|
print_banner
|
|
check_vpn_status
|
|
echo ""
|
|
show_network_status
|
|
exit 0
|
|
;;
|
|
-r|--routes)
|
|
show_routes
|
|
exit 0
|
|
;;
|
|
--help)
|
|
show_help
|
|
exit 0
|
|
;;
|
|
*)
|
|
echo "Unknown option: $1"
|
|
echo "Use --help for usage information"
|
|
exit 1
|
|
;;
|
|
esac
|
|
done
|
|
|
|
if [ "$DO_CONNECT" = "true" ] && [ "$DO_DISCONNECT" = "true" ]; then
|
|
echo "Error: --connect and --disconnect are mutually exclusive"
|
|
exit 1
|
|
fi
|
|
}
|
|
|
|
# Main
|
|
parse_args "$@"
|
|
cleanup_old_logs
|
|
|
|
echo "" >> "$(get_log_file)"
|
|
echo "========================================" >> "$(get_log_file)"
|
|
log INFO "=== Starting OpenConnect-SSO VPN ==="
|
|
echo ""
|
|
log DEBUG "VPN_EMAIL=$VPN_EMAIL"
|
|
log DEBUG "VPN_HOST=$VPN_HOST"
|
|
log DEBUG "TARGET_IP=$TARGET_IP"
|
|
log DEBUG "TARGET_SUBNET=$TARGET_SUBNET"
|
|
log DEBUG "VPN_TOTP_SECRET is $([ -n "$VPN_TOTP_SECRET" ] && echo 'set' || echo 'NOT SET')"
|
|
|
|
print_banner
|
|
|
|
if [ "$DO_DISCONNECT" = "true" ]; then
|
|
disconnect_vpn
|
|
exit $?
|
|
fi
|
|
|
|
if [ "$DO_CONNECT" = "true" ]; then
|
|
connect_vpn
|
|
exit $?
|
|
fi
|
|
|
|
# Auto-connect logic (unless -m flag)
|
|
if [ "$SKIP_AUTO_CONNECT" = "true" ]; then
|
|
log INFO "Menu mode - skipping auto-connect"
|
|
elif check_vpn_status; then
|
|
echo ""
|
|
log INFO "VPN already connected. Setting up forwarding..."
|
|
setup_forwarding
|
|
else
|
|
echo ""
|
|
log INFO "Auto-starting VPN connection..."
|
|
echo ""
|
|
connect_vpn
|
|
fi
|
|
|
|
# Interactive menu loop
|
|
while true; do
|
|
echo ""
|
|
main_menu
|
|
echo -ne "${CYAN}Choice: ${NC}"
|
|
read -r choice
|
|
echo ""
|
|
|
|
[[ -z "${choice// }" ]] && continue
|
|
|
|
case $choice in
|
|
1) connect_vpn ;;
|
|
2) disconnect_vpn ;;
|
|
3) check_vpn_status ;;
|
|
4) setup_forwarding ;;
|
|
5) test_connection ;;
|
|
6) show_network_status ;;
|
|
7) show_routes ;;
|
|
8) show_totp ;;
|
|
q|Q) log INFO "Goodbye!"; exit 0 ;;
|
|
*) ;;
|
|
esac
|
|
done
|