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 "defaultroute"
  17         proto_config_add_boolean "peerdns"
  18         proto_config_add_boolean "ipv6"
  19         proto_config_add_int "mtu"
  20         proto_config_add_string "server"
  21         available=1
  22         no_device=1
  23 }
  24
  25 proto_l2tp_setup() {
  26         local config="$1"
  27         local iface="$2"
  28         local optfile="/tmp/l2tp/options.${config}"
  29
  30         local ip serv_addr server
  31         json_get_var server server && {
  32                 for ip in $(resolveip -t 5 "$server"); do
  33                         ( proto_add_host_dependency "$config" "$ip" )
  34                         serv_addr=1
  35                 done
  36         }
  37         [ -n "$serv_addr" ] || {
  38                 echo "Could not resolve server address"
  39                 sleep 5
  40                 proto_setup_failed "$config"
  41                 exit 1
  42         }
  43
  44         if [ ! -p /var/run/xl2tpd/l2tp-control ]; then
  45                 /etc/init.d/xl2tpd start
  46         fi
  47
  48         json_get_vars ipv6 peerdns defaultroute demand keepalive username password pppd_options
  49         [ "$ipv6" = 1 ] || ipv6=""
  50         [ "$peerdns" = 0 ] && peerdns="" || peerdns="1"
  51         if [ "$defaultroute" = 1 ]; then
  52                 defaultroute="defaultroute replacedefaultroute";
  53         else
  54                 defaultroute="nodefaultroute"
  55         fi
  56         if [ "${demand:-0}" -gt 0 ]; then
  57                 demand="precompiled-active-filter /etc/ppp/filter demand idle $demand"
  58         else
  59                 demand="persist"
  60         fi
  61
  62         [ -n "$mtu" ] || json_get_var mtu mtu
  63
  64         local interval="${keepalive##*[, ]}"
  65         [ "$interval" != "$keepalive" ] || interval=5
  66
  67         mkdir -p /tmp/l2tp
  68
  69         echo "${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}}" > "${optfile}"
  70         echo "${peerdns:+usepeerdns}" >> "${optfile}"
  71         echo "$defaultroute" >> "${optfile}"
  72         echo "${username:+user \"$username\" password \"$password\"}" >> "${optfile}"
  73         echo "ipparam \"$config\"" >> "${optfile}"
  74         echo "ifname \"l2tp-$config\"" >> "${optfile}"
  75         echo "ip-up-script /lib/netifd/ppp-up" >> "${optfile}"
  76         echo "ipv6-up-script /lib/netifd/ppp-up" >> "${optfile}"
  77         echo "ip-down-script /lib/netifd/ppp-down" >> "${optfile}"
  78         echo "ipv6-down-script /lib/netifd/ppp-down" >> "${optfile}"
  79         # Don't wait for LCP term responses; exit immediately when killed.
  80         echo "lcp-max-terminate 0" >> "${optfile}"
  81         echo "${ipv6:++ipv6} ${pppd_options}" >> "${optfile}"
  82         echo "${mtu:+mtu $mtu mru $mtu}" >> "${optfile}"
  83
  84         xl2tpd-control add l2tp-${config} pppoptfile=${optfile} lns=${server} redial=yes redial timeout=20
  85         xl2tpd-control connect l2tp-${config}
  86 }
  87
  88 proto_l2tp_teardown() {
  89         local interface="$1"
  90         local optfile="/tmp/l2tp/options.${interface}"
  91
  92         case "$ERROR" in
  93                 11|19)
  94                         proto_notify_error "$interface" AUTH_FAILED
  95                         proto_block_restart "$interface"
  96                 ;;
  97                 2)
  98                         proto_notify_error "$interface" INVALID_OPTIONS
  99                         proto_block_restart "$interface"
 100                 ;;
 101         esac
 102
 103         xl2tpd-control disconnect l2tp-${interface}
 104         # Wait for interface to go down
 105         while [ -d /sys/class/net/l2tp-${interface} ]; do
 106                 sleep 1
 107         done
 108
 109         xl2tpd-control remove l2tp-${interface}
 110         rm -f ${optfile}
 111 }
 112
 113 [ -n "$INCLUDE_ONLY" ] || {
 114         add_protocol l2tp
 115 }