From b544d69e19c1c2f5261aad4c0795dcf297d47e4c Mon Sep 17 00:00:00 2001
From: mbm <mbm@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Mon, 30 May 2005 09:09:58 +0000
Subject: make dnsmasq probe for dhcp servers before starting a dhcp server

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@1110 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 .../default/target_skeleton/etc/init.d/S50dnsmasq  | 25 +++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

(limited to 'openwrt/target/default/target_skeleton/etc/init.d')

diff --git a/openwrt/target/default/target_skeleton/etc/init.d/S50dnsmasq b/openwrt/target/default/target_skeleton/etc/init.d/S50dnsmasq
index 995c1b6e7..55bbc3719 100755
--- a/openwrt/target/default/target_skeleton/etc/init.d/S50dnsmasq
+++ b/openwrt/target/default/target_skeleton/etc/init.d/S50dnsmasq
@@ -1,2 +1,25 @@
 #!/bin/sh
-/usr/sbin/dnsmasq
+. /etc/functions.sh
+
+# interface to use for DHCP
+iface=lan
+
+ifname=$(nvram get ${iface}_ifname)
+ipaddr=$(nvram get ${iface}_ipaddr)
+netmask=$(nvram get ${iface}_netmask)
+
+# check for existing DHCP server
+udhcpc -n -q -R -s /dev/zero -i $ifname >&- || {
+
+  ipaddr=$(ip2int $ipaddr)
+  netmask=$(ip2int ${netmask:-255.255.255.0})
+  network=$((ipaddr&netmask))
+  
+  start=$(nvram get dhcp_start)
+  start=$((network+${start:-100}))
+  end=$(nvram get dhcp_num)
+  end=$((start+${end:-150}))
+  
+  args="-K -F $(int2ip $start),$(int2ip $end),$(int2ip $netmask),12h"
+}
+/usr/sbin/dnsmasq ${args}
-- 
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