343 lines
10 KiB
Bash
Executable File
343 lines
10 KiB
Bash
Executable File
#!/bin/sh
|
||
#
|
||
# Purpose {{{
|
||
# This script will try to manage VPN with forticlient v7
|
||
# 1. Start a VPN will
|
||
# a. Ensure forticlient systemd unit is started.
|
||
# b. Try to connect to VPN with profile name.
|
||
# 2. Stop a VPN will
|
||
# a. Disconnect from the VPN.
|
||
# b. Stop and disable forticlient systemd unit.
|
||
# c. Restart systemd-resolved to ensure to have correct DNS resolvers.
|
||
#
|
||
# 2023-01-24
|
||
# }}}
|
||
# Flags {{{
|
||
## Exit on error {{{
|
||
set -o errexit
|
||
## }}}
|
||
## Exit on unset var {{{
|
||
### Use "${VARNAME-}" to test a var that may not have been set
|
||
set -o nounset
|
||
## }}}
|
||
## Pipeline command is treated as failed {{{
|
||
### Not available in POSIX sh − https://github.com/koalaman/shellcheck/wiki/SC3040
|
||
#set -o pipefail
|
||
## }}}
|
||
## Help with debugging {{{
|
||
### Call the script by prefixing it with "TRACE=1 ./script.sh"
|
||
if [ "${TRACE-0}" -eq 1 ]; then set -o xtrace; fi
|
||
## }}}
|
||
# }}}
|
||
# Vars {{{
|
||
PROGNAME=$(basename "${0}"); readonly PROGNAME
|
||
PROGDIR=$(readlink --canonicalize-missing $(dirname "${0}")); readonly PROGDIR
|
||
ARGS="${*}"; readonly ARGS
|
||
readonly NBARGS="${#}"
|
||
[ -z "${DEBUG-}" ] && DEBUG=1
|
||
## Export DEBUG for sub-script
|
||
export DEBUG
|
||
|
||
## Default values for some vars
|
||
readonly REQUEST_STATUS_DEFAULT="start"
|
||
readonly VPN_PROFILE_NAME_DEFAULT="Universite Rennes 1"
|
||
VPN_USER_DEFAULT=$(whoami) ; readonly VPN_USER_DEFAULT
|
||
readonly FORTICLIENT_NEW_VERSION="7.0.0.0"
|
||
|
||
## Colors
|
||
readonly PURPLE='\033[1;35m'
|
||
readonly RED='\033[0;31m'
|
||
readonly RESET='\033[0m'
|
||
readonly COLOR_DEBUG="${PURPLE}"
|
||
# }}}
|
||
usage() { # {{{
|
||
|
||
cat <<- HELP
|
||
usage: $PROGNAME [-d|-h|-p|-u]
|
||
|
||
Try to easily manage VPN with forticlient.
|
||
|
||
EXAMPLES :
|
||
- Start VPN with default profife name and default user
|
||
${PROGNAME}
|
||
|
||
- Stop the VPN
|
||
${PROGNAME} stop
|
||
|
||
- Start VPN with specific VPN user
|
||
${PROGNAME} --user my_lambda_username start
|
||
|
||
- Start VPN with specific VPN profile name
|
||
${PROGNAME} --profile "My University name" start
|
||
|
||
OPTIONS :
|
||
-d,--debug
|
||
Enable debug messages.
|
||
|
||
-h,--help
|
||
Print this help message.
|
||
|
||
-p,--profile
|
||
Define VPN profile name to use.
|
||
Default : ${VPN_PROFILE_NAME_DEFAULT}
|
||
|
||
-u,--user
|
||
Define VPN user name to use.
|
||
Default : ${VPN_USER_DEFAULT}
|
||
|
||
For a first connection, try to start \`forticlient gui\` first to configure EMS
|
||
and to check profile name.
|
||
|
||
HELP
|
||
}
|
||
# }}}
|
||
debug_message() { # {{{
|
||
|
||
local_debug_message="${1}"
|
||
|
||
## Print message if DEBUG is enable (=0)
|
||
[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG − ${PROGNAME} : ${local_debug_message}"
|
||
|
||
unset local_debug_message
|
||
|
||
return 0
|
||
}
|
||
# }}}
|
||
error_message() { # {{{
|
||
|
||
local_error_message="${1}"
|
||
local_error_code="${2}"
|
||
|
||
## Print message
|
||
printf '%b\n' "ERROR − ${PROGNAME} : ${RED}${local_error_message}${RESET}" >&2
|
||
|
||
unset local_error_message
|
||
|
||
exit "${local_error_code:=66}"
|
||
}
|
||
# }}}
|
||
define_vars() { # {{{
|
||
|
||
## If request_status wasn't defined (argument) {{{
|
||
if [ -z "${request_status-}" ]; then
|
||
## Use default value
|
||
readonly request_status="${REQUEST_STATUS_DEFAULT}"
|
||
fi
|
||
## }}}
|
||
## If vpn_profile_name wasn't defined (argument) {{{
|
||
if [ -z "${vpn_profile_name-}" ]; then
|
||
## Use default value
|
||
readonly vpn_profile_name="${VPN_PROFILE_NAME_DEFAULT}"
|
||
fi
|
||
## }}}
|
||
## If vpn_user wasn't defined (argument) {{{
|
||
if [ -z "${vpn_user-}" ]; then
|
||
## Use default value
|
||
readonly vpn_user="${VPN_USER_DEFAULT}"
|
||
fi
|
||
## }}}
|
||
## Try to get forticlient version {{{
|
||
is_command_available "dpkg" "| " \
|
||
&& forticlient_current_version=$(dpkg --list -- forticlient | awk '/^ii *forticlient/ {print $3}' | sed 's/.:\(.*\)-.*/\1/')
|
||
## }}}
|
||
}
|
||
# }}}
|
||
|
||
is_command_available() { # {{{
|
||
|
||
local_command_available_cmd="${1}"
|
||
debug_prefix="${2:-}"
|
||
|
||
## Return False by default
|
||
return_command_available="1"
|
||
|
||
if [ "$(command -v ${local_command_available_cmd})" ]; then
|
||
debug_message "${debug_prefix}is_command_available − \
|
||
${RED}${local_command_available_cmd}${COLOR_DEBUG} seems present on this host."
|
||
return_command_available="0"
|
||
else
|
||
debug_message "${debug_prefix}is_command_available − \
|
||
${RED}${local_command_available_cmd}${COLOR_DEBUG} is not available on this host."
|
||
return_command_available="1"
|
||
fi
|
||
|
||
unset local_command_available_cmd
|
||
unset debug_prefix
|
||
|
||
return "${return_command_available}"
|
||
}
|
||
# }}}
|
||
|
||
main() { # {{{
|
||
|
||
debug_message "--- MAIN BEGIN"
|
||
|
||
## If forticlient command is not available {{{
|
||
### Exit with error
|
||
is_command_available "forticlient" "| " \
|
||
|| error_message "forticlient is not in PATH, ensure the package is installed." 01
|
||
## }}}
|
||
|
||
## Define all vars
|
||
define_vars
|
||
debug_message "| Define vars"
|
||
|
||
## If forticlient version is lower than expected one (7) {{{
|
||
### Exit with error
|
||
is_version_greater_than "${forticlient_current_version}" "${FORTICLIENT_NEW_VERSION}" \
|
||
|| error_message "Forticlient installed version (${forticlient_current_version}) seems lower than expected (>=${FORTICLIENT_NEW_VERSION}). Please see fortinet.vpn.v6.sh script instead." 02
|
||
## }}}
|
||
|
||
## If the VPN must be stopped {{{
|
||
if [ "${request_status}" = "stop" ]; then
|
||
debug_message "-- Disconnect VPN BEGIN"
|
||
|
||
### If the VPN is still connected {{{
|
||
forticlient_status=$(forticlient vpn status | head --lines=1 | sed 's/Status: \(.*\)/\1/' || error_message "Error while requesting current VPN status." 22)
|
||
if [ "${forticlient_status}" = "Connected" ]; then
|
||
debug_message "| VPN is ${RED}${forticlient_status}${COLOR_DEBUG}, try to disconnect it…"
|
||
### Try to disconnect
|
||
forticlient vpn disconnect > /dev/null \
|
||
|| error_message "Error when disconnecting VPN." 11
|
||
fi
|
||
### }}}
|
||
|
||
### Stop the systemd service {{{
|
||
debug_message "| Try to stop and disable forticlient.service unit"
|
||
sudo systemctl stop forticlient.service \
|
||
|| error_message "Error while stopping forticlient.service unit" 12
|
||
### Ensure to disable it
|
||
sudo systemctl disable forticlient.service \
|
||
|| error_message "Error while disabling forticlient.service unit" 13
|
||
### }}}
|
||
|
||
### Ensure to restart DNS resolver {{{
|
||
debug_message "| Try to restart systemd-resolved.service unit to have correct DNS resolvers."
|
||
sudo systemctl restart systemd-resolved.service \
|
||
|| error_message "Error while restart systemd-resolved.service unit" 14
|
||
### }}}
|
||
|
||
debug_message "-- Disconnect VPN END"
|
||
fi
|
||
## }}}
|
||
## If the VPN must be started {{{
|
||
if [ "${request_status}" = "start" ]; then
|
||
debug_message "-- Connect VPN BEGIN"
|
||
### If forticlient.service unit is not started {{{
|
||
systemd_forticlient_status=$(systemctl show --property ActiveState --value forticlient.service || error_message "Error while requesting forticlient.service unit status." 21)
|
||
if [ "${systemd_forticlient_status}" = "inactive" ]; then
|
||
debug_message "| Try to start forticlient.service unit."
|
||
sudo systemctl restart forticlient.service \
|
||
|| error_message "Error while (re)starting forticlient.service unit" 22
|
||
fi
|
||
### }}}
|
||
### If forticlient.service unit is started {{{
|
||
systemd_forticlient_status=$(systemctl show --property ActiveState --value forticlient.service || error_message "Error while requesting forticlient.service unit status." 21)
|
||
if [ "${systemd_forticlient_status}" = "active" ]; then
|
||
debug_message "| forticlient.service unit is ${RED}started${COLOR_DEBUG}."
|
||
fi
|
||
### }}}
|
||
|
||
### If the VPN is not connected {{{
|
||
forticlient_status=$(forticlient vpn status | head --lines=1 | sed 's/Status: \(.*\)/\1/' || error_message "Error while requesting current VPN status." 23)
|
||
|
||
if [ "${forticlient_status}" = "Not Running" ]; then
|
||
### If script was started from a launcher {{{
|
||
if [ -n "${DISPLAY-}" ] && [ "${TERM}" = "linux" ]; then
|
||
### Try to launch a new TERM_EMULATOR to ask the password
|
||
"${TERM_EMULATOR}" -e forticlient vpn connect "${vpn_profile_name}" --password --user="${vpn_user}" \
|
||
|| error_message "Error when connecting to VPN profile (${vpn_profile_name})." 24
|
||
### }}}
|
||
### Else we consider it was started from CLI {{{
|
||
else
|
||
### Try to connect
|
||
forticlient vpn connect "${vpn_profile_name}" --password --user="${vpn_user}" \
|
||
|| error_message "Error when connecting to VPN profile (${vpn_profile_name})." 25
|
||
fi
|
||
### }}}
|
||
fi
|
||
### }}}
|
||
### If the VPN is connected {{{
|
||
forticlient_status=$(forticlient vpn status | head --lines=1 | sed 's/Status: \(.*\)/\1/' || error_message "Error while requesting current VPN status." 25)
|
||
if [ "${forticlient_status}" = "Connected" ]; then
|
||
debug_message "| VPN is ${RED}${forticlient_status}${COLOR_DEBUG}."
|
||
fi
|
||
### }}}
|
||
|
||
debug_message "-- Connect VPN END"
|
||
fi
|
||
## }}}
|
||
|
||
debug_message "--- MAIN END"
|
||
}
|
||
# }}}
|
||
|
||
# Manage arguments # {{{
|
||
# This code can't be in a function due to argument management
|
||
|
||
if [ ! "${NBARGS}" -eq "0" ]; then
|
||
|
||
manage_arg="0"
|
||
|
||
## If the first argument ask for help (h|help|-h|-help|-*h|-*help)
|
||
if printf -- '%s' "${1-}" | grep --quiet --extended-regexp -- "^-*h(elp)?$"; then
|
||
usage
|
||
exit 0
|
||
fi
|
||
|
||
# Parse all argument one by one
|
||
while printf -- '%s' "${1-}" | grep --quiet -- "."; do
|
||
|
||
case "${1}" in
|
||
-d|--debug ) ## debug
|
||
DEBUG=0
|
||
debug_message "--- Manage argument BEGIN"
|
||
;;
|
||
--start|start ) ## Define request_status to start
|
||
## Define var
|
||
readonly request_status="start"
|
||
;;
|
||
--stop|stop ) ## Define request_status to stop
|
||
## Define var
|
||
readonly request_status="stop"
|
||
;;
|
||
-p|--profile ) ## Define vpn_profile_name with given arg
|
||
## Move to the next argument
|
||
shift
|
||
## Define var
|
||
readonly vpn_profile_name="${1}"
|
||
;;
|
||
-u|--user ) ## Define vpn_user with given arg
|
||
## Move to the next argument
|
||
shift
|
||
## Define var
|
||
readonly vpn_user="${1}"
|
||
;;
|
||
* ) ## unknow option
|
||
printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
|
||
printf '%b\n' "---"
|
||
usage
|
||
exit 1
|
||
;;
|
||
esac
|
||
|
||
debug_message "| ${RED}${1}${COLOR_DEBUG} option managed."
|
||
|
||
## Move to the next argument
|
||
shift
|
||
manage_arg=$((manage_arg+1))
|
||
|
||
done
|
||
|
||
debug_message "| ${RED}${manage_arg}${COLOR_DEBUG} argument(s) successfully managed."
|
||
else
|
||
debug_message "| No arguments/options to manage."
|
||
fi
|
||
|
||
debug_message "--- Manage argument END"
|
||
# }}}
|
||
|
||
main
|
||
|
||
exit 0
|