net/xl2tpd/files/l2tp.sh

   1 find_route() {
   2         ip route get $1 | sed -e 's/ /\n/g' | \
   3             sed -ne '1p;/via/{N;p};/dev/{N;p};/src/{N;p};/mtu/{N;p}'
   4 }
   5
   6 scan_l2tp() {
   7         config_set "$1" device "l2tp-$1"
   8 }
   9
  10 stop_interface_l2tp() {
  11         local config="$1"
  12         local lock="/var/lock/l2tp-${config}"
  13         local optfile="/tmp/l2tp/options.${config}"
  14         local l2tpcontrol=/var/run/xl2tpd/l2tp-control
  15
  16         lock "$lock"
  17
  18         [ -p ${l2tpcontrol} ] && echo "r l2tp-${config}" > ${l2tpcontrol}
  19         rm -f ${optfile}
  20
  21         for ip in $(uci_get_state network "$1" serv_addrs); do
  22             ip route del "$ip" 2>/dev/null
  23         done
  24
  25         lock -u "$lock"
  26 }
  27
  28 setup_interface_l2tp() {
  29         local config="$2"
  30         local lock="/var/lock/l2tp-${config}"
  31         local optfile="/tmp/l2tp/options.${config}"
  32
  33         lock "$lock"
  34
  35         if [ ! -p /var/run/xl2tpd/l2tp-control ]; then
  36             /etc/init.d/xl2tpd start
  37         fi
  38
  39         local device
  40         config_get device "$config" device "l2tp-$config"
  41
  42         local server
  43         config_get server "$config" server
  44
  45         local username
  46         config_get username "$config" username
  47
  48         local password
  49         config_get password "$config" password
  50
  51         local keepalive
  52         config_get keepalive "$config" keepalive
  53
  54         local pppd_options
  55         config_get pppd_options "$config" pppd_options
  56
  57         local defaultroute
  58         config_get_bool defaultroute "$config" defaultroute 1
  59         [ "$defaultroute" -eq 1 ] && \
  60                 defaultroute="defaultroute replacedefaultroute" || defaultroute="nodefaultroute"
  61
  62         local interval="${keepalive##*[, ]}"
  63         [ "$interval" != "$keepalive" ] || interval=5
  64
  65         local dns
  66         config_get dns "$config" dns
  67
  68         local has_dns=0
  69         local peer_default=1
  70         [ -n "$dns" ] && {
  71                 has_dns=1
  72                 peer_default=0
  73         }
  74
  75         local peerdns
  76         config_get_bool peerdns "$config" peerdns $peer_default
  77
  78         [ "$peerdns" -eq 1 ] && {
  79                 peerdns="usepeerdns"
  80         } || {
  81                 peerdns=""
  82                 add_dns "$config" $dns
  83         }
  84
  85         local ipv6
  86         config_get ipv6 "$config" ipv6 1
  87         [ "$ipv6" -eq 1 ] && ipv6="+ipv6" || ipv6=""
  88
  89         local serv_addrs=""
  90         for ip in $(resolveip -t 3 "$server"); do
  91                 append serv_addrs "$ip"
  92                 ip route replace $(find_route $ip)
  93         done
  94         uci_toggle_state network "$config" serv_addrs "$serv_addrs"
  95
  96         # fix up the netmask
  97         config_get netmask "$config" netmask
  98         [ -z "$netmask" -o -z "$device" ] || ifconfig $device netmask $netmask
  99
 100         config_get mtu "$config" mtu
 101
 102         mkdir -p /tmp/l2tp
 103
 104         echo ${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive%%[, ]*}} > "${optfile}"
 105         echo "$peerdns" >> "${optfile}"
 106         echo "$defaultroute" >> "${optfile}"
 107         echo "${username:+user \"$username\" password \"$password\"}" >> "${optfile}"
 108         echo "ipparam \"$config\"" >> "${optfile}"
 109         echo "ifname \"l2tp-$config\"" >> "${optfile}"
 110         # Don't wait for LCP term responses; exit immediately when killed.
 111         echo "lcp-max-terminate 0" >> "${optfile}"
 112         echo "${ipv6} ${pppd_options}" >> "${optfile}"
 113
 114         xl2tpd-control remove l2tp-${config}
 115         # Wait and ensure pppd has died.
 116         while [ -d /sys/class/net/l2tp-${config} ]; do
 117             sleep 1
 118         done
 119
 120         xl2tpd-control add l2tp-${config} pppoptfile=${optfile} lns=${server} redial=yes redial timeout=20
 121         xl2tpd-control connect l2tp-${config}
 122
 123         lock -u "${lock}"
 124 }