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authorjow <jow@3c298f89-4303-0410-b956-a3cf2f4a3e73>2011-06-12 18:59:40 +0000
committerjow <jow@3c298f89-4303-0410-b956-a3cf2f4a3e73>2011-06-12 18:59:40 +0000
commit9f0d58cb15d8f345bfacb0b2e6f7aa86e62e1e31 (patch)
treef7125fcff859f42d17b713a4b2289d1a902cd6b1 /package/6to4/files
parente81bc2b5738927a41c44f9a9f99b34be0474a4be (diff)
[package] 6to4: don't start if detected local IPv4 address is RFC1918, allows people to deploy firmwares with 6to4 enabled by default
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27160 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/6to4/files')
-rwxr-xr-xpackage/6to4/files/6to4.sh16
1 files changed, 15 insertions, 1 deletions
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 ..."