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# relay.sh - Abstract relayd protocol backend
# Copyright (c) 2011 OpenWrt.org
# Hook into scan_interfaces() to synthesize a .device option
# This is needed for /sbin/ifup to properly dispatch control
# to setup_interface_relay() even if no .ifname is set in
# the configuration.
scan_relay() {
config_set "$1" device "relay-$1"
}
# No coldplugging needed, relayd will be restarted if one of
# the member interfaces goes up or down
#coldplug_interface_relay() {
# setup_interface_relay "relay-$1" "$1"
#}
setup_interface_relay() {
local iface="$1"
local cfg="$2"
local link="relay-$cfg"
local args=""
local ifaces=""
resolve_ifname() {
grep -qs "^ *$1:" /proc/net/dev && {
append args "-I $1"
append ifaces "$1"
}
}
resolve_network() {
local ifn
config_get ifn "$1" ifname
resolve_ifname "$ifn"
}
local net networks
config_get networks "$cfg" network
for net in $networks; do
resolve_network "$net"
done
local ifn ifnames
config_get ifnames "$cfg" ifname
for ifn in $ifnames; do
resolve_ifname "$ifn"
done
local ipaddr
config_get ipaddr "$cfg" ipaddr
[ -n "$ipaddr" ] && append args "-L $ipaddr"
local gateway
config_get gateway "$cfg" gateway
[ -n "$gateway" ] && append args "-G $gateway"
local expiry # = 30
config_get expiry "$cfg" expiry
[ -n "$expiry" ] && append args "-t $expiry"
local retry # = 5
config_get retry "$cfg" retry
[ -n "$retry" ] && append args "-p $retry"
local table # = 16800
config_get table "$cfg" table
[ -n "$table" ] && append args "-T $table"
local fwd_bcast # = 1
config_get_bool fwd_bcast "$cfg" forward_bcast 1
[ $fwd_bcast -eq 1 ] && append args "-B"
local fwd_dhcp # = 1
config_get_bool fwd_dhcp "$cfg" forward_dhcp 1
[ $fwd_dhcp -eq 1 ] && append args "-D"
start-stop-daemon -b -S -m -p /var/run/$link.pid \
-x /usr/sbin/relayd -- $args
uci_set_state network "$cfg" device "$ifaces"
env -i ACTION="ifup" DEVICE="$link" INTERFACE="$cfg" PROTO="relay" \
/sbin/hotplug-call iface
}
stop_interface_relay() {
local cfg="$1"
local link="relay-$cfg"
env -i ACTION="ifdown" DEVICE="$link" INTERFACE="$cfg" PROTO="relay" \
/sbin/hotplug-call iface
service_kill relayd "/var/run/$link.pid"
}
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