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nat46: harden 464xlat teardown logic

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Quit the teardown function in case the file 464-$cfg-anycast is not
present as it means no clean up of ip rules is required.
It fixes error traces like "cat: can't open '/tmp/464-wan6_4-anycast':
No such file or directory" and "Error: inet6 prefix is expected rather
than "lookup"."
At the same time remove the unused variable anycast_active.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
This commit is contained in:
Hans Dedecker 2018-01-16 10:29:20 +01:00
parent d464bf11b8
commit 013b91dc6d
2 changed files with 4 additions and 3 deletions
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2
nat46/Makefile
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@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=nat46
PKG_VERSION:=10
PKG_VERSION:=11
PKG_RELEASE:=$(PKG_SOURCE_VERSION)
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz

5
nat46/files/464xlat.sh
View file

@ -81,13 +81,14 @@ proto_464xlat_setup() {
proto_464xlat_teardown() {
local cfg="$1"
local link="464-$cfg"
[ -f /tmp/464-$cfg-anycast ] || return
local ip6addr=$(cat /tmp/464-$cfg-anycast)
local anycast_active
464xlatcfg "$link"
rm -rf /tmp/464-$cfg-anycast
ip -6 rule del to $ip6addr lookup prelocal
[ -n "$ip6addr" ] && ip -6 rule del to $ip6addr lookup prelocal
if [ -z "$(ls /tmp/464-*-anycast 2>&-)" ]; then
ip -6 rule del from all lookup local