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139 lines
3.0 KiB
Bash
Executable File
139 lines
3.0 KiB
Bash
Executable File
#!/bin/sh
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# 6in4.sh - IPv6-in-IPv4 tunnel backend
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# Copyright (c) 2010 OpenWrt.org
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[ -n "$INCLUDE_ONLY" ] || {
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. /etc/functions.sh
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. ../netifd-proto.sh
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init_proto "$@"
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}
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find_6in4_wanif() {
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local if=$(ip -4 r l e 0.0.0.0/0); if="${if#default* dev }"; if="${if%% *}"
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[ -n "$if" ] && grep -qs "^ *$if:" /proc/net/dev && echo "$if"
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}
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find_6in4_wanip() {
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local ip=$(ip -4 a s dev "$1"); ip="${ip#*inet }"
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echo "${ip%%[^0-9.]*}"
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}
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# Hook into scan_interfaces() to synthesize a .device option
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# This is needed for /sbin/ifup to properly dispatch control
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# to setup_interface_6in4() even if no .ifname is set in
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# the configuration.
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scan_6in4() {
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config_set "$1" device "6in4-$1"
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}
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coldplug_interface_6in4() {
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setup_interface_6in4 "6in4-$1" "$1"
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}
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tun_error() {
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local cfg="$1"; shift;
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[ -n "$1" ] && proto_notify_error "$cfg" "$@"
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proto_block_restart "$cfg"
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}
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proto_6in4_setup() {
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local cfg="$1"
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local iface="$2"
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local link="6in4-$cfg"
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json_get_var mtu mtu
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json_get_var ttl ttl
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json_get_var local4 ipaddr
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json_get_var remote4 peeraddr
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json_get_var ip6addr ip6addr
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json_get_var tunnelid tunnelid
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json_get_var username username
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json_get_var password password
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[ -z "$ip6addr" -o -z "$remote4" ] && {
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tun_error "$cfg" "MISSING_ADDRESS"
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return
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}
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[ -z "$local4" ] && {
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local wanif=$(find_6in4_wanif)
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[ -z "$wanif" ] && {
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tun_error "$cfg" "NO_WAN_LINK"
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return
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}
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. /lib/network/config.sh
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local wancfg="$(find_config "$wanif")"
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[ -z "$wancfg" ] && {
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tun_error "$cfg" "NO_WAN_LINK"
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return
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}
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# If local4 is unset, guess local IPv4 address from the
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# interface used by the default route.
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[ -n "$wanif" ] && local4=$(find_6in4_wanip "$wanif")
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[ -z "$local4" ] && {
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tun_error "$cfg" "NO_WAN_LINK"
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return
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}
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}
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local local6="${ip6addr%%/*}"
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local mask6="${ip6addr##*/}"
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[[ "$local6" = "$mask6" ]] && mask6=
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proto_init_update "$link" 1
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proto_add_ipv6_address "$local6" "$mask6"
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proto_add_ipv6_route "::" 0
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proto_add_tunnel
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json_add_string mode sit
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json_add_int mtu "${mtu:-1280}"
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json_add_int ttl "${ttl:-64}"
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json_add_string local "$local4"
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json_add_string remote "$remote4"
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proto_close_tunnel
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proto_send_update "$cfg"
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[ -n "$tunnelid" -a -n "$username" -a -n "$password" ] && {
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[ "${#password}" == 32 -a -z "${password//[a-fA-F0-9]/}" ] || {
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password="$(echo -n "$password" | md5sum)"; password="${password%% *}"
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}
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local url="http://ipv4.tunnelbroker.net/ipv4_end.php?ip=AUTO&apikey=$username&pass=$password&tid=$tunnelid"
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local try=0
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local max=3
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while [ $((++try)) -le $max ]; do
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wget -qO/dev/null "$url" 2>/dev/null && break
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sleep 1
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done
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}
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}
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proto_6in4_teardown() {
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local cfg="$1"
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}
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proto_6in4_init_config() {
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no_device=1
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available=1
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proto_config_add_string "ipaddr"
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proto_config_add_string "ip6addr"
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proto_config_add_string "peeraddr"
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proto_config_add_string "tunnelid"
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proto_config_add_string "username"
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proto_config_add_string "password"
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proto_config_add_int "mtu"
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proto_config_add_int "ttl"
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}
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[ -n "$INCLUDE_ONLY" ] || {
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add_protocol 6in4
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}
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