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21eeb45420
Add Generic Packet Tunneling in IPv6 Specification (RFC 2473) support. Signed-off-by: Arayuki Mago <ms@missing233.com> Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
144 lines
3.0 KiB
Bash
144 lines
3.0 KiB
Bash
#!/bin/sh
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# dslite.sh - IPv4-in-IPv6 tunnel backend for ipip6 and ds-lite
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# Copyright (c) 2013 OpenWrt.org
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# Copyright (c) 2013 Steven Barth <steven@midlink.org>
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# Copyright (c) 2021 Kenji Uno <ku@digitaldolphins.jp>
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# Copyright (c) 2024 Arayuki Mago <ms@missing233.com>
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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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tnl_setup() {
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local cfg="$1"
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local iface="$2"
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local tnl_type="$3"
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local ip4addr="$4"
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local ip4gateway="$5"
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local link="$tnl_type-$cfg"
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local remoteip6
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local mtu ttl peeraddr ip6addr tunlink zone weakif encaplimit
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json_get_vars mtu ttl peeraddr ip6addr tunlink zone weakif encaplimit
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[ -z "$peeraddr" ] && {
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proto_notify_error "$cfg" "MISSING_ADDRESS"
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proto_block_restart "$cfg"
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return
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}
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( proto_add_host_dependency "$cfg" "::" "$tunlink" )
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remoteip6=$(resolveip -6 "$peeraddr")
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if [ -z "$remoteip6" ]; then
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sleep 3
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remoteip6=$(resolveip -6 "$peeraddr")
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if [ -z "$remoteip6" ]; then
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proto_notify_error "$cfg" "AFTR_DNS_FAIL"
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return
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fi
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fi
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for ip6 in $remoteip6; do
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peeraddr=$ip6
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break
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done
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[ -z "$ip6addr" ] && {
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local wanif="$tunlink"
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if [ -z "$wanif" ] && ! network_find_wan6 wanif; then
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proto_notify_error "$cfg" "NO_WAN_LINK"
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return
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fi
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if ! network_get_ipaddr6 ip6addr "$wanif"; then
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[ -z "$weakif" ] && weakif="lan"
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if ! network_get_ipaddr6 ip6addr "$weakif"; then
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proto_notify_error "$cfg" "NO_WAN_LINK"
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return
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fi
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fi
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}
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proto_init_update "$link" 1
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proto_add_ipv4_route "0.0.0.0" 0
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proto_add_ipv4_address "$ip4addr" "" "" "$ip4gateway"
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proto_add_tunnel
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json_add_string mode ipip6
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json_add_int mtu "${mtu:-1280}"
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json_add_int ttl "${ttl:-64}"
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json_add_string local "$ip6addr"
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json_add_string remote "$peeraddr"
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[ -n "$tunlink" ] && json_add_string link "$tunlink"
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json_add_object "data"
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[ -n "$encaplimit" ] && json_add_string encaplimit "$encaplimit"
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json_close_object
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proto_close_tunnel
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proto_add_data
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[ -n "$zone" ] && json_add_string zone "$zone"
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if [ "$tnl_type" = "ds" ]; then
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json_add_array firewall
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json_add_object ""
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json_add_string type nat
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json_add_string target ACCEPT
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json_close_object
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json_close_array
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fi
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proto_close_data
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proto_send_update "$cfg"
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}
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init_config() {
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no_device=1
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available=1
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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 "tunlink"
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proto_config_add_int "mtu"
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proto_config_add_int "ttl"
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proto_config_add_string "encaplimit"
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proto_config_add_string "zone"
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proto_config_add_string "weakif"
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}
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proto_ipip6_init_config() {
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init_config
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proto_config_add_string "ip4ifaddr"
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}
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proto_ipip6_setup() {
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local ip4ifaddr
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json_get_vars ip4ifaddr
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tnl_setup "$1" "$2" "ipip6" "$ip4ifaddr" "0.0.0.0"
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}
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proto_ipip6_teardown() {
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local cfg="$1"
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}
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proto_dslite_init_config() {
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init_config
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}
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proto_dslite_setup() {
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tnl_setup "$1" "$2" "ds" "192.0.0.2" "192.0.0.1"
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}
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proto_dslite_teardown() {
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local cfg="$1"
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}
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[ -n "$INCLUDE_ONLY" ] || {
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add_protocol ipip6
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add_protocol dslite
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}
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