package/relayd/files/relay.sh

   1 # relay.sh - Abstract relayd protocol backend
   2 # Copyright (c) 2011 OpenWrt.org
   3
   4 # Hook into scan_interfaces() to synthesize a .device option
   5 # This is needed for /sbin/ifup to properly dispatch control
   6 # to setup_interface_relay() even if no .ifname is set in
   7 # the configuration.
   8 scan_relay() {
   9         config_set "$1" device "relay-$1"
  10 }
  11
  12 # No coldplugging needed, relayd will be restarted if one of
  13 # the member interfaces goes up or down
  14 #coldplug_interface_relay() {
  15 #       setup_interface_relay "relay-$1" "$1"
  16 #}
  17
  18 setup_interface_relay() {
  19         local iface="$1"
  20         local cfg="$2"
  21         local link="relay-$cfg"
  22
  23         local args=""
  24         local ifaces=""
  25
  26         resolve_ifname() {
  27                 grep -qs "^ *$1:" /proc/net/dev && {
  28                         append args "-I $1"
  29                         append ifaces "$1"
  30                 }
  31         }
  32
  33         resolve_network() {
  34                 local ifn
  35                 config_get ifn "$1" ifname
  36                 resolve_ifname "$ifn"
  37         }
  38
  39         local net networks
  40         config_get networks "$cfg" network
  41         for net in $networks; do
  42                 resolve_network "$net"
  43         done
  44
  45         local ifn ifnames
  46         config_get ifnames "$cfg" ifname
  47         for ifn in $ifnames; do
  48                 resolve_ifname "$ifn"
  49         done
  50
  51         local gateway
  52         config_get gateway "$cfg" gateway
  53         [ -n "$gateway" ] && append args "-G $gateway"
  54
  55         local expiry # = 30
  56         config_get expiry "$cfg" expiry
  57         [ -n "$expiry" ] && append args "-t $expiry"
  58
  59         local retry # = 5
  60         config_get retry "$cfg" retry
  61         [ -n "$retry" ] && append args "-p $retry"
  62
  63         local table # = 16800
  64         config_get table "$cfg" table
  65         [ -n "$table" ] && append args "-T $table"
  66
  67         local fwd_bcast # = 1
  68         config_get_bool fwd_bcast "$cfg" forward_bcast 1
  69         [ $fwd_bcast -eq 1 ] && append args "-B"
  70
  71         local fwd_dhcp # = 1
  72         config_get_bool fwd_dhcp "$cfg" forward_dhcp 1
  73         [ $fwd_dhcp -eq 1 ] && append args "-D"
  74
  75         start-stop-daemon -b -S -m -p /var/run/$link.pid \
  76                 -x /usr/sbin/relayd -- $args
  77
  78         uci_set_state network "$cfg" device "$ifaces"
  79
  80         env -i ACTION="ifup" DEVICE="$link" INTERFACE="$cfg" PROTO="relay" \
  81                 /sbin/hotplug-call iface
  82 }
  83
  84 stop_interface_relay() {
  85         local cfg="$1"
  86         local link="relay-$cfg"
  87
  88         env -i ACTION="ifdown" DEVICE="$link" INTERFACE="$cfg" PROTO="relay" \
  89                 /sbin/hotplug-call iface
  90
  91         service_kill relayd "/var/run/$link.pid"
  92 }
  93