464xlat: import from routing, add myself as maintainer

[openwrt/openwrt.git] / package / network / ipv6 / 464xlat / files / 464xlat.sh

diff --git a/package/network/ipv6/464xlat/files/464xlat.sh b/package/network/ipv6/464xlat/files/464xlat.sh
new file mode 100755 (executable)
index 0000000..e5fcf7d
--- /dev/null
+++ b/package/network/ipv6/464xlat/files/464xlat.sh
@@ -0,0 +1,111 @@
+#!/bin/sh
+# 464xlat.sh - 464xlat CLAT
+#
+# Copyright (c) 2015 Steven Barth <cyrus@openwrt.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2
+# as published by the Free Software Foundation
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+[ -n "$INCLUDE_ONLY" ] || {
+       . /lib/functions.sh
+       . /lib/functions/network.sh
+       . ../netifd-proto.sh
+       init_proto "$@"
+}
+
+proto_464xlat_setup() {
+       local cfg="$1"
+       local iface="$2"
+       local link="464-$cfg"
+
+       local ip6addr ip6prefix tunlink zone
+       json_get_vars ip6addr ip6prefix tunlink zone
+
+       [ -z "$zone" ] && zone="wan"
+
+       ( proto_add_host_dependency "$cfg" "::" "$tunlink" )
+
+       if [ -z "$tunlink" ] && ! network_find_wan6 tunlink; then
+               proto_notify_error "$cfg" "NO_WAN_LINK"
+               return
+       fi
+       network_get_device tundev "$tunlink"
+
+       ip6addr=$(464xlatcfg "$link" "$tundev" "$ip6prefix" 192.0.0.1 $ip6addr)
+       if [ -z "$ip6addr" ]; then
+               proto_notify_error "$cfg" "CLAT_CONFIG_FAILED"
+               return
+       fi
+
+       ip -6 rule del from all lookup local
+       ip -6 rule add from all lookup local pref 1
+       ip -6 rule add to $ip6addr lookup prelocal pref 0
+       echo "$ip6addr" > /tmp/464-$cfg-anycast
+
+       proto_init_update "$link" 1
+       proto_add_ipv4_route "0.0.0.0" 0 "" "" 2048
+       proto_add_ipv6_route $ip6addr 128 "" "" "" "" 128
+
+       proto_add_data
+       [ "$zone" != "-" ] && json_add_string zone "$zone"
+
+       json_add_array firewall
+               json_add_object ""
+                       json_add_string type nat
+                       json_add_string target SNAT
+                       json_add_string family inet
+                       json_add_string snat_ip 192.0.0.1
+               json_close_object
+               json_add_object ""
+                       json_add_string type rule
+                       json_add_string family inet6
+                       json_add_string proto all
+                       json_add_string direction in
+                       json_add_string dest "$zone"
+                       json_add_string src "$zone"
+                       json_add_string src_ip $ip6addr
+                       json_add_string target ACCEPT
+               json_close_object
+       json_close_array
+       proto_close_data
+
+       proto_send_update "$cfg"
+}
+
+proto_464xlat_teardown() {
+       local cfg="$1"
+       local link="464-$cfg"
+
+       [ -f /tmp/464-$cfg-anycast ] || return
+       local ip6addr=$(cat /tmp/464-$cfg-anycast)
+
+       464xlatcfg "$link"
+
+       rm -rf /tmp/464-$cfg-anycast
+       [ -n "$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
+               ip -6 rule add from all lookup local pref 0
+       fi
+}
+
+proto_464xlat_init_config() {
+       no_device=1
+       available=1
+
+       proto_config_add_string "ip6prefix"
+       proto_config_add_string "ip6addr"
+       proto_config_add_string "tunlink"
+       proto_config_add_string "zone"
+}
+
+[ -n "$INCLUDE_ONLY" ] || {
+        add_protocol 464xlat
+}