From 089e7410edd98d232381cdbcde58b89fff797eb0 Mon Sep 17 00:00:00 2001
From: Michael Tremer <michael.tremer@ipfire.org>
Date: Thu, 8 Sep 2016 18:42:41 +0200
Subject: [PATCH] DHCP: Check if subnet range already exists before creating

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---
 src/functions/functions.dhcpd | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/functions/functions.dhcpd b/src/functions/functions.dhcpd
index b112eed6..5e44cd6a 100644
--- a/src/functions/functions.dhcpd
+++ b/src/functions/functions.dhcpd
@@ -755,6 +755,12 @@ dhcpd_subnet_range_new() {
 		return ${EXIT_ERROR}
 	fi
 
+	# Check if range already exists
+	if dhcpd_subnet_range_exists ${proto} ${subnet} ${range}; then
+		error "DHCP subnet range ${range} already exists"
+		return ${EXIT_ERROR}
+	fi
+
 	# Write the configuration to file.
 	local file=$(dhcpd_subnet_range_path ${proto} ${subnet} "${START}-${END}")
 	assert isset file
-- 
2.47.3