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 "demand"
  18         proto_config_add_int "mtu"
  19         proto_config_add_int "checkup_interval"
  20         proto_config_add_string "server"
  21         available=1
  22         no_device=1
  23         no_proto_task=1
  24         teardown_on_l3_link_down=1
  25 }
  26
  27 proto_l2tp_setup() {
  28         local interface="$1"
  29         local optfile="/tmp/l2tp/options.${interface}"
  30         local ip serv_addr server host
  31
  32         json_get_var server server
  33         host="${server%:*}"
  34         for ip in $(resolveip -t 5 "$host"); do
  35                 ( proto_add_host_dependency "$interface" "$ip" )
  36                 serv_addr=1
  37         done
  38         [ -n "$serv_addr" ] || {
  39                 echo "Could not resolve server address" >&2
  40                 sleep 5
  41                 proto_setup_failed "$interface"
  42                 exit 1
  43         }
  44
  45         # Start and wait for xl2tpd
  46         if [ ! -p /var/run/xl2tpd/l2tp-control -o -z "$(pidof xl2tpd)" ]; then
  47                 /etc/init.d/xl2tpd restart
  48
  49                 local wait_timeout=0
  50                 while [ ! -p /var/run/xl2tpd/l2tp-control ]; do
  51                         wait_timeout=$(($wait_timeout + 1))
  52                         [ "$wait_timeout" -gt 5 ] && {
  53                                 echo "Cannot find xl2tpd control file." >&2
  54                                 proto_setup_failed "$interface"
  55                                 exit 1
  56                         }
  57                         sleep 1
  58                 done
  59         fi
  60
  61         local ipv6 demand keepalive username password pppd_options mtu
  62         json_get_vars ipv6 demand keepalive username password pppd_options mtu
  63         [ "$ipv6" = 1 ] || ipv6=""
  64         if [ "${demand:-0}" -gt 0 ]; then
  65                 demand="precompiled-active-filter /etc/ppp/filter demand idle $demand"
  66         else
  67                 demand="persist"
  68         fi
  69
  70         local interval="${keepalive##*[, ]}"
  71         [ "$interval" != "$keepalive" ] || interval=5
  72
  73         keepalive="${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}}"
  74         username="${username:+user \"$username\" password \"$password\"}"
  75         ipv6="${ipv6:++ipv6}"
  76         mtu="${mtu:+mtu $mtu mru $mtu}"
  77
  78         mkdir -p /tmp/l2tp
  79         cat <<EOF >"$optfile"
  80 usepeerdns
  81 nodefaultroute
  82 ipparam "$interface"
  83 ifname "l2tp-$interface"
  84 ip-up-script /lib/netifd/ppp-up
  85 ipv6-up-script /lib/netifd/ppp-up
  86 ip-down-script /lib/netifd/ppp-down
  87 ipv6-down-script /lib/netifd/ppp-down
  88 # Don't wait for LCP term responses; exit immediately when killed.
  89 lcp-max-terminate 0
  90 $keepalive
  91 $username
  92 $ipv6
  93 $mtu
  94 $pppd_options
  95 EOF
  96
  97         xl2tpd-control add l2tp-${interface} pppoptfile=${optfile} lns=${server} || {
  98                 echo "xl2tpd-control: Add l2tp-$interface failed" >&2
  99                 proto_setup_failed "$interface"
 100                 exit 1
 101         }
 102         xl2tpd-control connect l2tp-${interface} || {
 103                 echo "xl2tpd-control: Connect l2tp-$interface failed" >&2
 104                 proto_setup_failed "$interface"
 105                 exit 1
 106         }
 107 }
 108
 109 proto_l2tp_teardown() {
 110         local interface="$1"
 111         local optfile="/tmp/l2tp/options.${interface}"
 112
 113         rm -f ${optfile}
 114         if [ -p /var/run/xl2tpd/l2tp-control ]; then
 115                 xl2tpd-control remove l2tp-${interface} || {
 116                         echo "xl2tpd-control: Remove l2tp-$interface failed" >&2
 117                 }
 118         fi
 119         # Wait for interface to go down
 120         while [ -d /sys/class/net/l2tp-${interface} ]; do
 121                 sleep 1
 122         done
 123 }
 124
 125 [ -n "$INCLUDE_ONLY" ] || {
 126         add_protocol l2tp
 127 }