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94 lines
1.8 KiB
Bash
Executable File
94 lines
1.8 KiB
Bash
Executable File
#!/bin/sh
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# 6to4.sh - IPv6-in-IPv4 tunnel backend
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# Copyright (c) 2010-2012 OpenWrt.org
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[ -n "$INCLUDE_ONLY" ] || {
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. /lib/functions.sh
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. /lib/functions/network.sh
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. ../netifd-proto.sh
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init_proto "$@"
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}
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find_6to4_prefix() {
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local ip4="$1"
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local oIFS="$IFS"; IFS="."; set -- $ip4; IFS="$oIFS"
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printf "2002:%02x%02x:%02x%02x\n" $1 $2 $3 $4
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}
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test_6to4_rfc1918()
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{
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local oIFS="$IFS"; IFS="."; set -- $1; IFS="$oIFS"
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[ $1 -eq 10 ] && return 0
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[ $1 -eq 192 ] && [ $2 -eq 168 ] && return 0
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[ $1 -eq 172 ] && [ $2 -ge 16 ] && [ $2 -le 31 ] && return 0
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# RFC 6598
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[ $1 -eq 100 ] && [ $2 -ge 64 ] && [ $2 -le 127 ] && return 0
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return 1
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}
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proto_6to4_setup() {
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local cfg="$1"
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local iface="$2"
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local link="6to4-$cfg"
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local mtu ttl ipaddr
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json_get_vars mtu ttl ipaddr
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( proto_add_host_dependency "$cfg" 0.0.0.0 )
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local wanif
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if ! network_find_wan wanif; then
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proto_notify_error "$cfg" "NO_WAN_LINK"
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return
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fi
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[ -z "$ipaddr" ] && {
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if ! network_get_ipaddr ipaddr "$wanif"; then
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proto_notify_error "$cfg" "NO_WAN_ADDRESS"
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return
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fi
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}
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test_6to4_rfc1918 "$ipaddr" && {
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proto_notify_error "$cfg" "INVALID_LOCAL_ADDRESS"
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return
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}
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# find our local prefix
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local prefix6=$(find_6to4_prefix "$ipaddr")
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local local6="$prefix6::1"
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proto_init_update "$link" 1
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proto_add_ipv6_address "$local6" 16
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proto_add_ipv6_route "::" 0 "::192.88.99.1"
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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 "$ipaddr"
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proto_close_tunnel
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proto_send_update "$cfg"
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}
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proto_6to4_teardown() {
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local cfg="$1"
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}
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proto_6to4_init_config() {
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no_device=1
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available=1
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proto_config_add_string "ipaddr"
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proto_config_add_int "mtu"
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proto_config_add_int "ttl"
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}
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[ -n "$INCLUDE_ONLY" ] || {
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add_protocol 6to4
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}
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