net/xl2tpd/files/l2tp.sh

   1 #!/bin/sh
   2
   3 [ -x /usr/sbin/xl2tpd ] || exit 0
   4
   5 [ -n "$INCLUDE_ONLY" ] || {
   6         . /lib/functions.sh
   7         . ../netifd-proto.sh
   8         init_proto "$@"
   9 }
  10
  11 proto_l2tp_init_config() {
  12         proto_config_add_string "username"
  13         proto_config_add_string "password"
  14         proto_config_add_string "keepalive"
  15         proto_config_add_string "pppd_options"
  16         proto_config_add_boolean "ipv6"
  17         proto_config_add_int "mtu"
  18         proto_config_add_string "server"
  19         available=1
  20         no_device=1
  21 }
  22
  23 proto_l2tp_setup() {
  24         local config="$1"
  25         local iface="$2"
  26         local optfile="/tmp/l2tp/options.${config}"
  27
  28         local ip serv_addr server
  29         json_get_var server server && {
  30                 for ip in $(resolveip -t 5 "$server"); do
  31                         ( proto_add_host_dependency "$config" "$ip" )
  32                         serv_addr=1
  33                 done
  34         }
  35         [ -n "$serv_addr" ] || {
  36                 echo "Could not resolve server address"
  37                 sleep 5
  38                 proto_setup_failed "$config"
  39                 exit 1
  40         }
  41
  42         if [ ! -p /var/run/xl2tpd/l2tp-control ]; then
  43                 /etc/init.d/xl2tpd start
  44         fi
  45
  46         json_get_vars ipv6 demand keepalive username password pppd_options
  47         [ "$ipv6" = 1 ] || ipv6=""
  48         if [ "${demand:-0}" -gt 0 ]; then
  49                 demand="precompiled-active-filter /etc/ppp/filter demand idle $demand"
  50         else
  51                 demand="persist"
  52         fi
  53
  54         [ -n "$mtu" ] || json_get_var mtu mtu
  55
  56         local interval="${keepalive##*[, ]}"
  57         [ "$interval" != "$keepalive" ] || interval=5
  58
  59         mkdir -p /tmp/l2tp
  60
  61         echo "${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}}" > "${optfile}"
  62         echo "usepeerdns" >> "${optfile}"
  63         echo "nodefaultroute" >> "${optfile}"
  64         echo "${username:+user \"$username\" password \"$password\"}" >> "${optfile}"
  65         echo "ipparam \"$config\"" >> "${optfile}"
  66         echo "ifname \"l2tp-$config\"" >> "${optfile}"
  67         echo "ip-up-script /lib/netifd/ppp-up" >> "${optfile}"
  68         echo "ipv6-up-script /lib/netifd/ppp-up" >> "${optfile}"
  69         echo "ip-down-script /lib/netifd/ppp-down" >> "${optfile}"
  70         echo "ipv6-down-script /lib/netifd/ppp-down" >> "${optfile}"
  71         # Don't wait for LCP term responses; exit immediately when killed.
  72         echo "lcp-max-terminate 0" >> "${optfile}"
  73         echo "${ipv6:++ipv6} ${pppd_options}" >> "${optfile}"
  74         echo "${mtu:+mtu $mtu mru $mtu}" >> "${optfile}"
  75
  76         xl2tpd-control add l2tp-${config} pppoptfile=${optfile} lns=${server} redial=yes redial timeout=20
  77         xl2tpd-control connect l2tp-${config}
  78 }
  79
  80 proto_l2tp_teardown() {
  81         local interface="$1"
  82         local optfile="/tmp/l2tp/options.${interface}"
  83
  84         case "$ERROR" in
  85                 11|19)
  86                         proto_notify_error "$interface" AUTH_FAILED
  87                         proto_block_restart "$interface"
  88                 ;;
  89                 2)
  90                         proto_notify_error "$interface" INVALID_OPTIONS
  91                         proto_block_restart "$interface"
  92                 ;;
  93         esac
  94
  95         xl2tpd-control disconnect l2tp-${interface}
  96         # Wait for interface to go down
  97         while [ -d /sys/class/net/l2tp-${interface} ]; do
  98                 sleep 1
  99         done
 100
 101         xl2tpd-control remove l2tp-${interface}
 102         rm -f ${optfile}
 103 }
 104
 105 [ -n "$INCLUDE_ONLY" ] || {
 106         add_protocol l2tp
 107 }