X-Git-Url: http://git.openwrt.org/?a=blobdiff_plain;f=package%2F6to4%2Ffiles%2F6to4.sh;fp=package%2F6to4%2Ffiles%2F6to4.sh;h=6e85914b434190f72475647342dc6a984cf272f2;hb=d3b8685cd79e04f6c215e13220b9ba8784ea7e0a;hp=65f4ffa5c2613f731f11f1fbd2b60f05b13907ea;hpb=01e7d775e79427108e1229008e28a5b76c2aa895;p=openwrt%2Fopenwrt.git

diff --git a/package/6to4/files/6to4.sh b/package/6to4/files/6to4.sh
index 65f4ffa5c2..6e85914b43 100755
--- a/package/6to4/files/6to4.sh
+++ b/package/6to4/files/6to4.sh
@@ -1,5 +1,5 @@
 # 6to4.sh - IPv6-in-IPv4 tunnel backend
-# Copyright (c) 2010 OpenWrt.org
+# Copyright (c) 2010-2011 OpenWrt.org
 
 find_6to4_wanif() {
 	local if=$(ip -4 r l e 0.0.0.0/0); if="${if#default* dev }"; if="${if%% *}"
@@ -18,6 +18,15 @@ find_6to4_prefix() {
 	printf "2002:%02x%02x:%02x%02x\n" $1 $2 $3 $4
 }
 
+test_6to4_rfc1918()
+{
+	local oIFS="$IFS"; IFS="."; set -- $1; IFS="$oIFS"
+	[ $1 -eq  10 ] && return 0
+	[ $1 -eq 192 ] && [ $2 -eq 168 ] && return 0
+	[ $1 -eq 172 ] && [ $2 -ge  16 ] && [ $2 -le  31 ] && return 0
+	return 1
+}
+
 set_6to4_radvd_interface() {
 	local cfgid="$1"
 	local lanif="${2:-lan}"
@@ -136,6 +145,11 @@ setup_interface_6to4() {
 		}
 	}
 
+	test_6to4_rfc1918 "$local4" && {
+		logger -t "$link" "Local wan ip $local4 is private - aborting"
+		return
+	}
+
 	[ -n "$local4" ] && {
 		logger -t "$link" "Starting ..."