Brutal refactoring for more logging and readability of the script because debugging is hell
This commit is contained in:
Alexandre Aubin
GitHub
@@ -17,8 +17,44 @@
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Functions
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## State functions
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###################################################################################
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# Logging helpers #
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###################################################################################
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LOGFILE="/var/log/ynh-vpnclient.log"
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touch $LOGFILE
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chown root:root $LOFILE
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chmod 600 $LOGFILE
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function success()
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{
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echo "[ OK ] $1" | tee -a $LOGFILE
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}
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function info()
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{
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echo "[INFO] $1" | tee -a $LOGFILE
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}
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function warn()
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{
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echo "[WARN] $1" | tee -a $LOGFILE >&2
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}
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function error()
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{
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echo "[FAIL] $1" | tee -a $LOGFILE >&2
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}
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function critical()
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{
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echo "[CRIT] $1" | tee -a $LOGFILE >&2
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exit 1
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}
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###################################################################################
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# IPv6 and route config stuff #
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###################################################################################
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has_nativeip6() {
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ip -6 route | grep -q default\ via
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@@ -28,27 +64,24 @@ has_ip6delegatedprefix() {
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[ "${ynh_ip6_addr}" != none ]
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}
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has_hotspot_app() {
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[ -e /tmp/.ynh-hotspot-started ]
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}
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is_hotspot_knowme() {
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hotspot_vpnclient=$(ynh_setting_get hotspot vpnclient)
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[ "${hotspot_vpnclient}" == yes ]
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}
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is_firewall_set() {
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wired_device=${1}
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ip6tables -w -nvL OUTPUT | grep vpnclient_out | grep -q "${wired_device}"\
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&& iptables -w -nvL OUTPUT | grep vpnclient_out | grep -q "${wired_device}"
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}
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is_ip6addr_set() {
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ip address show dev tun0 2> /dev/null | grep -q "${ynh_ip6_addr}/128"
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}
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set_ip6addr() {
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info "Adding IPv6 from VPN configuration"
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ip address add "${ynh_ip6_addr}/128" dev tun0
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}
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unset_ip6addr() {
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info "Removing IPv6 from VPN configuration"
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ip address delete "${ynh_ip6_addr}/128" dev tun0
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}
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#
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# Server IPv6 route
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#
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is_serverip6route_set() {
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server_ip6=${1}
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@@ -59,28 +92,96 @@ is_serverip6route_set() {
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fi
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}
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set_serverip6route() {
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server_ip6=${1}
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ip6_gw=${2}
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wired_device=${3}
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info "Adding IPv6 server route"
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ip route add "${server_ip6}/128" via "${ip6_gw}" dev "${wired_device}"
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}
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unset_serverip6route() {
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server_ip6=${1}
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ip6_gw=${2}
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wired_device=${3}
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info "Removing IPv6 server route"
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ip route delete "${server_ip6}/128" via "${ip6_gw}" dev "${wired_device}"
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}
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###################################################################################
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# Hotspot app #
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###################################################################################
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has_hotspot_app() {
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[ -e /tmp/.ynh-hotspot-started ]
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}
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is_hotspot_knowme() {
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hotspot_vpnclient=$(ynh_setting_get hotspot vpnclient)
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[ "${hotspot_vpnclient}" == yes ]
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}
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###################################################################################
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# DNS rules #
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###################################################################################
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is_dns_set() {
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# FIXME : having the ynh_dns0 in the resolv.dnsmasq.conf is not necessarily good enough
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# We want it to be the only one (with ynh_dns1) but nowadays for example ARN's resolver is
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# in the default list from yunohost...
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[ -e /etc/dhcp/dhclient-exit-hooks.d/ynh-vpnclient ]\
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&& ( grep -q ${ynh_dns0} /etc/resolv.conf || grep -q ${ynh_dns0} /etc/resolv.dnsmasq.conf )
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}
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is_openvpn_running() {
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systemctl is-active openvpn@client.service &> /dev/null
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set_dns() {
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info "Enforcing custom DNS resolvers from vpnclient"
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resolvconf=/etc/resolv.conf
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[ -e /etc/resolv.dnsmasq.conf ] && resolvconf=/etc/resolv.dnsmasq.conf
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cp -fa "${resolvconf}" "${resolvconf}.ynh"
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cat << EOF > /etc/dhcp/dhclient-exit-hooks.d/ynh-vpnclient
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echo nameserver ${ynh_dns0} > ${resolvconf}
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echo nameserver ${ynh_dns1} >> ${resolvconf}
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EOF
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bash /etc/dhcp/dhclient-exit-hooks.d/ynh-vpnclient
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}
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is_running() {
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((has_nativeip6 && is_serverip6route_set "${new_server_ip6}") || ! has_nativeip6)\
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&& ((! has_hotspot_app && has_ip6delegatedprefix && is_ip6addr_set) || has_hotspot_app || ! has_ip6delegatedprefix)\
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&& is_dns_set && is_firewall_set && is_openvpn_running
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unset_dns() {
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resolvconf=/etc/resolv.conf
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[ -e /etc/resolv.dnsmasq.conf ] && resolvconf=/etc/resolv.dnsmasq.conf
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info "Removing custom DNS resolvers from vpnclient"
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rm -f /etc/dhcp/dhclient-exit-hooks.d/ynh-vpnclient
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mv "${resolvconf}.ynh" "${resolvconf}"
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# FIXME : this situation happened to a user ...
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# We could try to force regen the dns conf
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# (though for now it's tightly coupled to dnsmasq)
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grep -q "^nameserver" "${resolvconf}" || error "${resolvconf} does not have any nameserver line !?"
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}
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## Setters
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###################################################################################
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# Firewall rules management #
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###################################################################################
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set_ip6addr() {
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ip address add "${ynh_ip6_addr}/128" dev tun0
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is_firewall_set() {
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wired_device=${1}
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ip6tables -w -nvL OUTPUT | grep vpnclient_out | grep -q "${wired_device}"\
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&& iptables -w -nvL OUTPUT | grep vpnclient_out | grep -q "${wired_device}"
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}
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set_firewall() {
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info "Adding vpnclient custom rules to the firewall"
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wired_device=${1}
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cp /etc/yunohost/hooks.d/{90-vpnclient.tpl,post_iptable_rules/90-vpnclient}
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@@ -95,29 +196,49 @@ set_firewall() {
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yunohost firewall reload
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}
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set_serverip6route() {
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server_ip6=${1}
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ip6_gw=${2}
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wired_device=${3}
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ip route add "${server_ip6}/128" via "${ip6_gw}" dev "${wired_device}"
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unset_firewall() {
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info "Cleaning vpnclient custom rules from the firewall"
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rm -f /etc/yunohost/hooks.d/post_iptable_rules/90-vpnclient
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yunohost firewall reload
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}
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set_dns() {
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resolvconf=/etc/resolv.conf
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[ -e /etc/resolv.dnsmasq.conf ] && resolvconf=/etc/resolv.dnsmasq.conf
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###################################################################################
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# Time sync #
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###################################################################################
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cp -fa "${resolvconf}" "${resolvconf}.ynh"
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sync_time() {
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info "Now synchronizing time using ntp..."
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systemctl stop ntp
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timeout 20 ntpd -qg &> /dev/null
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cat << EOF > /etc/dhcp/dhclient-exit-hooks.d/ynh-vpnclient
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echo nameserver ${ynh_dns0} > ${resolvconf}
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echo nameserver ${ynh_dns1} >> ${resolvconf}
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EOF
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# Some networks drop ntp port (udp 123).
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# Try to get the date with an http request on the internetcube web site
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if [ $? -ne 0 ]; then
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info "ntp synchronization failed, falling back to curl method"
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http_date=`curl -sD - labriqueinter.net | grep '^Date:' | cut -d' ' -f3-6`
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http_date_seconds=`date -d "${http_date}" +%s`
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curr_date_seconds=`date +%s`
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bash /etc/dhcp/dhclient-exit-hooks.d/ynh-vpnclient
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# Set the new date if it's greater than the current date
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# So it does if 1970 year or if old fake-hwclock date is used
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if [ $http_date_seconds -ge $curr_date_seconds ]; then
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date -s "${http_date}"
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fi
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fi
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systemctl start ntp
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}
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###################################################################################
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# OpenVPN client start/stop procedures #
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###################################################################################
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is_openvpn_running() {
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systemctl is-active openvpn@client.service &> /dev/null
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}
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start_openvpn() {
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info "Preparing openvpn configuration..."
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ip6_gw=${1}
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server_ip6=${2}
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@@ -135,6 +256,7 @@ start_openvpn() {
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sync_time
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info "Preparing openvpn configuration..."
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cp /etc/openvpn/client.conf{.tpl,}
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sed "s|<TPL:SERVER_NAME>|${ynh_server_name}|g" -i /etc/openvpn/client.conf
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@@ -165,61 +287,50 @@ start_openvpn() {
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sed 's|^<TPL:LOGIN_COMMENT>||' -i /etc/openvpn/client.conf
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fi
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info "Now actually starting OpenVPN client..."
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systemctl start openvpn@client.service
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}
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## Unsetters
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if [ ! $? -eq 0 ]
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then
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tail -n 20 /var/log/openvpn-client.log
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critical "Failed to start OpenVPN :/"
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else
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info "OpenVPN client started ... waiting for tun0 interface to show up"
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fi
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unset_ip6addr() {
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ip address delete "${ynh_ip6_addr}/128" dev tun0
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}
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for attempt in $(seq 0 20)
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do
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sleep 1
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if ip link show dev tun0 &> /dev/null
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then
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success "tun0 interface is up!"
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return 0
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fi
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done
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unset_firewall() {
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rm -f /etc/yunohost/hooks.d/post_iptable_rules/90-vpnclient
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yunohost firewall reload
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}
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unset_serverip6route() {
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server_ip6=${1}
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ip6_gw=${2}
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wired_device=${3}
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ip route delete "${server_ip6}/128" via "${ip6_gw}" dev "${wired_device}"
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}
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unset_dns() {
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resolvconf=/etc/resolv.conf
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[ -e /etc/resolv.dnsmasq.conf ] && resolvconf=/etc/resolv.dnsmasq.conf
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rm -f /etc/dhcp/dhclient-exit-hooks.d/ynh-vpnclient
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mv "${resolvconf}.ynh" "${resolvconf}"
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tail -n 20 /var/log/openvpn-client.log
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error "Tun0 interface did not show up ... possibly an issue with OpenVPN client"
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stop_openvpn && exit 1
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}
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stop_openvpn() {
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# FIXME : isn't openvpn@client ? (idk)
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info "Stopping OpenVPN service"
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systemctl stop openvpn.service
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info "(Waiting for tun0 to disappear if it was up)"
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for attempt in $(seq 0 20)
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do
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if ip link show dev tun0 &> /dev/null
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then
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sleep 1
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fi
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done
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}
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## Tools
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sync_time() {
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systemctl stop ntp
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timeout 20 ntpd -qg &> /dev/null
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# Some networks drop ntp port (udp 123).
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# Try to get the date with an http request on the internetcube web site
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if [ $? -ne 0 ]; then
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http_date=`curl -sD - labriqueinter.net | grep '^Date:' | cut -d' ' -f3-6`
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http_date_seconds=`date -d "${http_date}" +%s`
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curr_date_seconds=`date +%s`
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# Set the new date if it's greater than the current date
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# So it does if 1970 year or if old fake-hwclock date is used
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if [ $http_date_seconds -ge $curr_date_seconds ]; then
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date -s "${http_date}"
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fi
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fi
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systemctl start ntp
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}
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###################################################################################
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# Yunohost settings interface #
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###################################################################################
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ynh_setting_get() {
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app=${1}
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@@ -236,6 +347,17 @@ ynh_setting_set() {
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yunohost app setting "${app}" "${setting}" -v "${value}"
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}
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###################################################################################
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# The actual ynh vpnclient management thing #
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###################################################################################
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is_running() {
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((has_nativeip6 && is_serverip6route_set "${new_server_ip6}") || ! has_nativeip6)\
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&& ((! has_hotspot_app && has_ip6delegatedprefix && is_ip6addr_set) || has_hotspot_app || ! has_ip6delegatedprefix)\
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&& is_dns_set && is_firewall_set && is_openvpn_running
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}
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if [ "$1" != restart ]; then
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# Restart php-fpm at the first start (it needs to be restarted after the slapd start)
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@@ -247,25 +369,19 @@ if [ "$1" != restart ]; then
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# Check configuration consistency
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if [[ ! "${1}" =~ stop ]]; then
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exitcode=0
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if [ ! -e /etc/openvpn/keys/ca-server.crt ]; then
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echo "[WARN] You need a CA server (you can add it through the web admin)"
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exitcode=1
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critical "You need a CA server (you can add it through the web admin)"
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fi
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empty=$(find /etc/openvpn/keys/ -empty -name credentials &> /dev/null | wc -l)
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if [ "${empty}" -gt 0 -a ! -e /etc/openvpn/keys/user.key ]; then
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echo "[WARN] You need either a client certificate, either a username, or both (you can add one through the web admin)"
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exitcode=1
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critical "You need either a client certificate, either a username, or both (you can add one through the web admin)"
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fi
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[ "${exitcode}" -ne 0 ] && exit ${exitcode}
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fi
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# Variables
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||||
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echo -n "Retrieving Yunohost settings... "
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info "Retrieving Yunohost settings... "
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ynh_service_enabled=$(ynh_setting_get vpnclient service_enabled)
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ynh_server_name=$(ynh_setting_get vpnclient server_name)
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@@ -285,73 +401,75 @@ if [ "$1" != restart ]; then
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new_server_ip6=$(host "${ynh_server_name}" 2> /dev/null | awk '/IPv6/ { print $NF; }')
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if [ -z "${new_server_ip6}" ]; then
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# FIXME wtf is this hardcoded IP ...
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new_server_ip6=$(host "${ynh_server_name}" 80.67.188.188 2> /dev/null | awk '/IPv6/ { print $NF; }')
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fi
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echo "OK"
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success "Settings retrieved"
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||||
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||||
fi
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||||
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||||
# Script
|
||||
###################################################################################
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# Start / stop / restart / status handling #
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||||
###################################################################################
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||||
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||||
case "${1}" in
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||||
# ########## #
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||||
# Starting #
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||||
# ########## #
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||||
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start)
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||||
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||||
if is_running; then
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echo "Already started"
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info "Service is already running"
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exit 0
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elif [ "${ynh_service_enabled}" -eq 0 ]; then
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||||
echo "Disabled service"
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||||
else
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||||
echo "[vpnclient] Starting..."
|
||||
warn "Service is disabled, not starting it"
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||||
exit 0
|
||||
fi
|
||||
|
||||
info "[vpnclient] Starting..."
|
||||
touch /tmp/.ynh-vpnclient-started
|
||||
|
||||
# Run openvpn
|
||||
if ! is_openvpn_running; then
|
||||
echo "Run openvpn"
|
||||
|
||||
if is_openvpn_running;
|
||||
then
|
||||
info "(openvpn is already running)"
|
||||
else
|
||||
start_openvpn "${new_ip6_gw}" "${new_server_ip6}"
|
||||
|
||||
if [ ! $? -eq 0 ]; then
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||||
exit 1
|
||||
fi
|
||||
|
||||
i=0; false || while [ $? -ne 0 ]; do
|
||||
sleep 1 && (( i++ ))
|
||||
[ ${i} -gt 20 ] && stop_openvpn
|
||||
[ ${i} -gt 20 ] && exit 1
|
||||
ip link show dev tun0 &> /dev/null
|
||||
done
|
||||
fi
|
||||
|
||||
# Check old state of the server ipv6 route
|
||||
if [ ! -z "${old_server_ip6}" -a ! -z "${old_ip6_gw}" -a ! -z "${old_wired_device}"\
|
||||
-a \( "${new_server_ip6}" != "${old_server_ip6}" -o "${new_ip6_gw}" != "${old_ip6_gw}"\
|
||||
-o "${new_wired_device}" != "${old_wired_device}" \) ]\
|
||||
&& is_serverip6route_set "${old_server_ip6}"; then
|
||||
|
||||
&& is_serverip6route_set "${old_server_ip6}"
|
||||
then
|
||||
unset_serverip6route "${old_server_ip6}" "${old_ip6_gw}" "${old_wired_device}"
|
||||
fi
|
||||
|
||||
# Set the new server ipv6 route
|
||||
if has_nativeip6 && ! is_serverip6route_set "${new_server_ip6}"; then
|
||||
echo "Set IPv6 server route"
|
||||
if has_nativeip6 && ! is_serverip6route_set "${new_server_ip6}"
|
||||
then
|
||||
set_serverip6route "${new_server_ip6}" "${new_ip6_gw}" "${new_wired_device}"
|
||||
fi
|
||||
|
||||
# Set the ipv6 address
|
||||
if ! has_hotspot_app && has_ip6delegatedprefix && ! is_ip6addr_set; then
|
||||
echo "Set IPv6 address"
|
||||
if ! has_hotspot_app && has_ip6delegatedprefix && ! is_ip6addr_set
|
||||
then
|
||||
set_ip6addr
|
||||
fi
|
||||
|
||||
# Set host DNS resolvers
|
||||
if ! is_dns_set; then
|
||||
echo "Set host DNS resolvers"
|
||||
if ! is_dns_set
|
||||
then
|
||||
set_dns
|
||||
fi
|
||||
|
||||
# Set ipv6/ipv4 firewall
|
||||
if ! is_firewall_set "${new_wired_device}"; then
|
||||
echo "Set IPv6/IPv4 firewall"
|
||||
if ! is_firewall_set "${new_wired_device}"
|
||||
then
|
||||
set_firewall "${new_wired_device}"
|
||||
fi
|
||||
|
||||
@@ -364,122 +482,124 @@ case "${1}" in
|
||||
if has_hotspot_app && ! is_hotspot_knowme; then
|
||||
ynh-hotspot start
|
||||
fi
|
||||
fi
|
||||
;;
|
||||
|
||||
# ########## #
|
||||
# Stopping #
|
||||
# ########## #
|
||||
|
||||
stop)
|
||||
echo "[vpnclient] Stopping..."
|
||||
info "[vpnclient] Stopping..."
|
||||
rm -f /tmp/.ynh-vpnclient-started
|
||||
|
||||
if ! has_hotspot_app && has_ip6delegatedprefix && is_ip6addr_set; then
|
||||
echo "Unset IPv6 address"
|
||||
unset_ip6addr
|
||||
fi
|
||||
|
||||
if is_serverip6route_set "${old_server_ip6}"; then
|
||||
echo "Unset IPv6 server route"
|
||||
unset_serverip6route "${old_server_ip6}" "${old_ip6_gw}" "${old_wired_device}"
|
||||
fi
|
||||
|
||||
if is_firewall_set "${old_wired_device}"; then
|
||||
echo "Unset IPv6/IPv4 firewall"
|
||||
unset_firewall
|
||||
fi
|
||||
is_firewall_set "${old_wired_device}" && unset_firewall
|
||||
|
||||
if is_dns_set; then
|
||||
echo "Unset forced host DNS resolvers"
|
||||
unset_dns
|
||||
fi
|
||||
is_dns_set && unset_dns
|
||||
|
||||
if is_openvpn_running; then
|
||||
echo "Stop openvpn"
|
||||
stop_openvpn
|
||||
|
||||
i=0; true && while [ $? -eq 0 ]; do
|
||||
sleep 1 && (( i++ ))
|
||||
[ ${i} -gt 20 ] && exit 1
|
||||
ip link show dev tun0 &> /dev/null
|
||||
done
|
||||
fi
|
||||
is_openvpn_running && stop_openvpn
|
||||
|
||||
# Fix configuration
|
||||
if has_hotspot_app && is_hotspot_knowme; then
|
||||
ynh-hotspot start
|
||||
fi
|
||||
;;
|
||||
|
||||
# ########## #
|
||||
# Restart #
|
||||
# ########## #
|
||||
|
||||
restart)
|
||||
$0 stop
|
||||
$0 start
|
||||
;;
|
||||
|
||||
# ########## #
|
||||
# Status #
|
||||
# ########## #
|
||||
|
||||
status)
|
||||
exitcode=0
|
||||
|
||||
if [ "${ynh_service_enabled}" -eq 0 ]; then
|
||||
echo "[ERR] VPN Client Service disabled"
|
||||
error "VPN Client Service disabled"
|
||||
exitcode=1
|
||||
fi
|
||||
|
||||
echo "[INFO] Autodetected internet interface: ${new_wired_device} (last start: ${old_wired_device})"
|
||||
echo "[INFO] Autodetected IPv6 address for the VPN server: ${new_server_ip6} (last start: ${old_server_ip6})"
|
||||
info "Autodetected internet interface: ${new_wired_device} (last start: ${old_wired_device})"
|
||||
info "Autodetected IPv6 address for the VPN server: ${new_server_ip6} (last start: ${old_server_ip6})"
|
||||
|
||||
if has_ip6delegatedprefix; then
|
||||
echo "[INFO] IPv6 delegated prefix found"
|
||||
echo "[INFO] IPv6 address computed from the delegated prefix: ${ynh_ip6_addr}"
|
||||
info "IPv6 delegated prefix found"
|
||||
info "IPv6 address computed from the delegated prefix: ${ynh_ip6_addr}"
|
||||
|
||||
if ! has_hotspot_app; then
|
||||
echo "[INFO] No Hotspot app detected"
|
||||
info "No Hotspot app detected"
|
||||
|
||||
if is_ip6addr_set; then
|
||||
echo "[OK] IPv6 address correctly set"
|
||||
success "IPv6 address correctly set"
|
||||
else
|
||||
echo "[ERR] No IPv6 address set"
|
||||
error "No IPv6 address set"
|
||||
exitcode=1
|
||||
fi
|
||||
else
|
||||
echo "[INFO] Hotspot app detected"
|
||||
echo "[INFO] No IPv6 address to set"
|
||||
info "Hotspot app detected"
|
||||
info "No IPv6 address to set"
|
||||
fi
|
||||
else
|
||||
echo "[INFO] No IPv6 delegated prefix found"
|
||||
info "No IPv6 delegated prefix found"
|
||||
fi
|
||||
|
||||
if has_nativeip6; then
|
||||
echo "[INFO] Native IPv6 detected"
|
||||
echo "[INFO] Autodetected native IPv6 gateway: ${new_ip6_gw} (last start: ${old_ip6_gw})"
|
||||
info "Native IPv6 detected"
|
||||
info "Autodetected native IPv6 gateway: ${new_ip6_gw} (last start: ${old_ip6_gw})"
|
||||
|
||||
if is_serverip6route_set "${new_server_ip6}"; then
|
||||
echo "[OK] IPv6 server route correctly set"
|
||||
success "IPv6 server route correctly set"
|
||||
else
|
||||
echo "[ERR] No IPv6 server route set"
|
||||
error "No IPv6 server route set"
|
||||
exitcode=1
|
||||
fi
|
||||
else
|
||||
echo "[INFO] No native IPv6 detected"
|
||||
echo "[INFO] No IPv6 server route to set"
|
||||
info "No native IPv6 detected"
|
||||
info "No IPv6 server route to set"
|
||||
fi
|
||||
|
||||
if is_firewall_set "${new_wired_device}"; then
|
||||
echo "[OK] IPv6/IPv4 firewall set"
|
||||
success "IPv6/IPv4 firewall set"
|
||||
else
|
||||
echo "[ERR] No IPv6/IPv4 firewall set"
|
||||
info "No IPv6/IPv4 firewall set"
|
||||
exitcode=1
|
||||
fi
|
||||
|
||||
if is_dns_set; then
|
||||
echo "[OK] Host DNS correctly set"
|
||||
success "Host DNS correctly set"
|
||||
else
|
||||
echo "[ERR] No host DNS set"
|
||||
error "No host DNS set"
|
||||
exitcode=1
|
||||
fi
|
||||
|
||||
if is_openvpn_running; then
|
||||
echo "[OK] Openvpn is running"
|
||||
success "Openvpn is running"
|
||||
else
|
||||
echo "[ERR] Openvpn is not running"
|
||||
error "Openvpn is not running"
|
||||
exitcode=1
|
||||
fi
|
||||
|
||||
exit ${exitcode}
|
||||
;;
|
||||
|
||||
# ########## #
|
||||
# Halp #
|
||||
# ########## #
|
||||
|
||||
*)
|
||||
echo "Usage: $0 {start|stop|restart|status}"
|
||||
exit 1
|
||||
|
||||
Reference in New Issue
Block a user