dnsmasq: add dhcp-script hook for other packages

Adds a script which acts as a hook for when dnsmasq creates/destroys a
lease, or completes a TFTP file transfer. The hook loops through scripts
in appropriate directories inside '/etc/hotplug.d', executing each one with
the same arguments supplied by dnsmasq.

In case dnsmasq is jailed by ujail the dhcp-script hook will not work as
expected as ujail does not yet support executing a script within a jail.

Signed-off-by: Nick Brassel <nick@tzarc.org>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/package/network/services/dnsmasq/files/dhcp-script.sh b/package/network/services/dnsmasq/files/dhcp-script.sh
new file mode 100755
index 0000000..8603269
--- /dev/null
+++ b/package/network/services/dnsmasq/files/dhcp-script.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+
+[ -f "$USER_DHCPSCRIPT" ] && . "$USER_DHCPSCRIPT" "$@"
+
+case "$1" in
+	add)
+		export ACTION="add"
+		export MACADDR="$2"
+		export IPADDR="$3"
+		export HOSTNAME="$4"
+		exec /sbin/hotplug-call dhcp
+	;;
+	del)
+		export ACTION="remove"
+		export MACADDR="$2"
+		export IPADDR="$3"
+		export HOSTNAME="$4"
+		exec /sbin/hotplug-call dhcp
+	;;
+	old)
+		export ACTION="update"
+		export MACADDR="$2"
+		export IPADDR="$3"
+		export HOSTNAME="$4"
+		exec /sbin/hotplug-call dhcp
+	;;
+	arp-add)
+		export ACTION="add"
+		export MACADDR="$2"
+		export IPADDR="$3"
+		exec /sbin/hotplug-call neigh
+	;;
+	arp-del)
+		export ACTION="remove"
+		export MACADDR="$2"
+		export IPADDR="$3"
+		exec /sbin/hotplug-call neigh
+	;;
+	tftp)
+		export ACTION="add"
+		export TFTP_SIZE="$2"
+		export TFTP_ADDR="$3"
+		export TFTP_PATH="$4"
+		exec /sbin/hotplug-call tftp
+	;;
+esac