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#!/bin/sh
# 6in4.sh - IPv6-in-IPv4 tunnel backend
# Copyright (c) 2010-2015 OpenWrt.org
[ -n "$INCLUDE_ONLY" ] || {
. /lib/functions.sh
. /lib/functions/network.sh
. ../netifd-proto.sh
init_proto "$@"
}
# Function taken from 6to4 package (6to4.sh), flipped returns
test_6in4_rfc1918()
{
local oIFS="$IFS"; IFS="."; set -- $1; IFS="$oIFS"
[ $1 -eq 10 ] && return 1
[ $1 -eq 192 ] && [ $2 -eq 168 ] && return 1
[ $1 -eq 172 ] && [ $2 -ge 16 ] && [ $2 -le 31 ] && return 1
# RFC 6598
[ $1 -eq 100 ] && [ $2 -ge 64 ] && [ $2 -le 127 ] && return 1
return 0
}
proto_6in4_update() {
sh -c '
timeout=5
(while [ $((timeout--)) -gt 0 ]; do
sleep 1
kill -0 $$ || exit 0
done; kill -9 $$) 2>/dev/null &
exec "$@"
' "$1" "$@"
}
proto_6in4_add_prefix() {
append "$3" "$1"
}
proto_6in4_setup() {
local cfg="$1"
local iface="$2"
local link="6in4-$cfg"
local mtu ttl tos ipaddr peeraddr ip6addr ip6prefix ip6prefixes tunlink tunnelid username password updatekey
json_get_vars mtu ttl tos ipaddr peeraddr ip6addr tunlink tunnelid username password updatekey
json_for_each_item proto_6in4_add_prefix ip6prefix ip6prefixes
[ -z "$peeraddr" ] && {
proto_notify_error "$cfg" "MISSING_ADDRESS"
proto_block_restart "$cfg"
return
}
( proto_add_host_dependency "$cfg" "$peeraddr" "$tunlink" )
[ -z "$ipaddr" ] && {
local wanif="$tunlink"
if [ -z "$wanif" ] && ! network_find_wan wanif; then
proto_notify_error "$cfg" "NO_WAN_LINK"
return
fi
if ! network_get_ipaddr ipaddr "$wanif"; then
proto_notify_error "$cfg" "NO_WAN_LINK"
return
fi
}
proto_init_update "$link" 1
[ -n "$ip6addr" ] && {
local local6="${ip6addr%%/*}"
local mask6="${ip6addr##*/}"
[ "$local6" = "$mask6" ] && mask6=
proto_add_ipv6_address "$local6" "$mask6"
proto_add_ipv6_route "::" 0 "" "" "" "$local6/$mask6"
}
for ip6prefix in $ip6prefixes; do
proto_add_ipv6_prefix "$ip6prefix"
proto_add_ipv6_route "::" 0 "" "" "" "$ip6prefix"
done
proto_add_tunnel
json_add_string mode sit
json_add_int mtu "${mtu:-1280}"
json_add_int ttl "${ttl:-64}"
[ -n "$tos" ] && json_add_string tos "$tos"
json_add_string local "$ipaddr"
json_add_string remote "$peeraddr"
[ -n "$tunlink" ] && json_add_string link "$tunlink"
proto_close_tunnel
proto_send_update "$cfg"
[ -n "$tunnelid" -a -n "$username" -a \( -n "$password" -o -n "$updatekey" \) ] && {
[ -n "$updatekey" ] && password="$updatekey"
local http="http"
local urlget="uclient-fetch"
local urlget_opts="-qO-"
local ca_path="${SSL_CERT_DIR:-/etc/ssl/certs}"
[ -f /lib/libustream-ssl.so ] && http=https
[ "$http" = "https" -a -z "$(find $ca_path -name "*.0" 2>/dev/null)" ] && {
urlget_opts="$urlget_opts --no-check-certificate"
}
local url="$http://ipv4.tunnelbroker.net/nic/update?hostname=$tunnelid"
test_6in4_rfc1918 "$ipaddr" && {
local url="${url}&myip=${ipaddr}"
}
local try=0
local max=3
(
set -o pipefail
while [ $((++try)) -le $max ]; do
if proto_6in4_update $urlget $urlget_opts --user="$username" --password="$password" "$url" 2>&1 | \
sed -e 's,^Killed$,timeout,' -e "s,^,update $try/$max: ," | \
logger -t "$link";
then
logger -t "$link" "updated"
return 0
fi
sleep 5
done
logger -t "$link" "update failed"
)
}
}
proto_6in4_teardown() {
local cfg="$1"
}
proto_6in4_init_config() {
no_device=1
available=1
proto_config_add_string "ipaddr"
proto_config_add_string "ip6addr"
proto_config_add_array "ip6prefix"
proto_config_add_string "peeraddr"
proto_config_add_string "tunlink"
proto_config_add_string "tunnelid"
proto_config_add_string "username"
proto_config_add_string "password"
proto_config_add_string "updatekey"
proto_config_add_int "mtu"
proto_config_add_int "ttl"
proto_config_add_string "tos"
}
[ -n "$INCLUDE_ONLY" ] || {
add_protocol 6in4
}
|
