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