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6to4: don't start if detected local IPv4 address is RFC1918, allows people to deploy firmwares with 6to4 enabled by default

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SVN-Revision: 27160
This commit is contained in:
Jo-Philipp Wich 2011-06-12 18:59:40 +00:00
parent 01e7d775e7
commit d3b8685cd7
2 changed files with 16 additions and 2 deletions
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2
package/6to4/Makefile
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@ -8,7 +8,7 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=6to4
PKG_VERSION:=3
PKG_VERSION:=4
PKG_RELEASE:=1
include $(INCLUDE_DIR)/package.mk

16
package/6to4/files/6to4.sh
View File

@ -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 ..."