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#!/bin/sh
# 6in4.sh - IPv6-in-IPv4 tunnel backend
# Copyright (c) 2010-2015 OpenWrt.org
[ -n "$INCLUDE_ONLY" ] || {
. /lib/functions.sh
. /lib/functions/network.sh
. ../netifd-proto.sh
init_proto "$@"
}
proto_6in4_setup() {
local cfg="$1"
local iface="$2"
local link="6in4-$cfg"
local mtu ttl tos ipaddr peeraddr ip6addr ip6prefix tunnelid username password updatekey sourcerouting
json_get_vars mtu ttl tos ipaddr peeraddr ip6addr ip6prefix tunnelid username password updatekey sourcerouting
[ -z "$peeraddr" ] && {
proto_notify_error "$cfg" "MISSING_ADDRESS"
proto_block_restart "$cfg"
return
}
( proto_add_host_dependency "$cfg" 0.0.0.0 )
[ -z "$ipaddr" ] && {
local wanif
if ! network_find_wan wanif || ! network_get_ipaddr ipaddr "$wanif"; then
proto_notify_error "$cfg" "NO_WAN_LINK"
return
fi
}
proto_init_update "$link" 1
local source=""
[ "$sourcerouting" != "0" ] && source="::/128"
proto_add_ipv6_route "::" 0 "" "" "" "$source"
[ -n "$ip6addr" ] && {
local local6="${ip6addr%%/*}"
local mask6="${ip6addr##*/}"
[[ "$local6" = "$mask6" ]] && mask6=
proto_add_ipv6_address "$local6" "$mask6"
[ "$sourcerouting" != "0" ] && proto_add_ipv6_route "::" 0 "" "" "" "$local6/$mask6"
}
[ -n "$ip6prefix" ] && {
proto_add_ipv6_prefix "$ip6prefix"
[ "$sourcerouting" != "0" ] && proto_add_ipv6_route "::" 0 "" "" "" "$ip6prefix"
}
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"
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="wget"
local urlget_opts="-qO-"
local ca_path="${SSL_CERT_DIR-/etc/ssl/certs}"
if [ -n "$(which curl)" ]; then
urlget="curl"
urlget_opts="-s -S"
if curl -V | grep "Protocols:" | grep -qF "https"; then
http="https"
urlget_opts="$urlget_opts --capath $ca_path"
fi
fi
if [ "$http" = "http" ] &&
wget --version 2>&1 | grep -qF "+https"; then
urlget="wget"
urlget_opts="-qO- --ca-directory=$ca_path"
http="https"
fi
[ "$http" = "https" -a -z "$(find $ca_path -name "*.0" 2>/dev/null)" ] && {
if [ "$urlget" = "curl" ]; then
urlget_opts="$urlget_opts -k"
else
urlget_opts="$urlget_opts --no-check-certificate"
fi
}
local url="$http://ipv4.tunnelbroker.net/nic/update?username=$username&password=$password&hostname=$tunnelid"
local try=0
local max=3
while [ $((++try)) -le $max ]; do
( exec $urlget $urlget_opts "$url" | logger -t "$link" ) &
local pid=$!
( sleep 20; kill $pid 2>/dev/null ) &
wait $pid && break
sleep 20;
done
}
}
proto_6in4_teardown() {
local cfg="$1"
}
proto_6in4_init_config() {
no_device=1
available=1
proto_config_add_string "ipaddr"
proto_config_add_string "ip6addr"
proto_config_add_string "ip6prefix"
proto_config_add_string "peeraddr"
proto_config_add_string "tunnelid"
proto_config_add_string "username"
proto_config_add_string "password"
proto_config_add_string "updatekey"
proto_config_add_int "mtu"
proto_config_add_int "ttl"
proto_config_add_string "tos"
proto_config_add_boolean "sourcerouting"
}
[ -n "$INCLUDE_ONLY" ] || {
add_protocol 6in4
}
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