OpenWrt – Rev 1

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#!/bin/sh

[ -n "$INCLUDE_ONLY" ] || {
        . /lib/functions.sh
        . /lib/functions/network.sh
        . ../netifd-proto.sh
        init_proto "$@"
}

proto_ipip_setup() {
        local cfg="$1"
        local remoteip

        local df ipaddr peeraddr tunlink ttl tos zone mtu
        json_get_vars df ipaddr peeraddr tunlink ttl tos zone mtu

        [ -z "$peeraddr" ] && {
                proto_notify_error "$cfg" "MISSING_PEER_ADDRESS"
                proto_block_restart "$cfg"
                return
        }

        remoteip=$(resolveip -t 10 -4 "$peeraddr")

        if [ -z "$remoteip" ]; then
                proto_notify_error "$cfg" "PEER_RESOLVE_FAIL"
                return
        fi

        for ip in $remoteip; do
                peeraddr=$ip
                break
        done

        ( proto_add_host_dependency "$cfg" "$peeraddr" "$tunlink" )

        [ -z "$ipaddr" ] && {
                local wanif="$tunlink"
                if [ -z $wanif ] && ! network_find_wan wanif; then
                        proto_notify_error "$cfg" "NO_WAN_LINK"
                        return
                fi

                if ! network_get_ipaddr ipaddr "$wanif"; then
                        proto_notify_error "$cfg" "NO_WAN_LINK"
                        return
                fi
        }

        proto_init_update "ipip-$cfg" 1

        proto_add_tunnel
        json_add_string mode "ipip"
        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"
        [ -n "$tunlink" ] && json_add_string link "$tunlink"
        json_add_boolean df "${df:-1}"

        proto_close_tunnel

        proto_add_data
        [ -n "$zone" ] && json_add_string zone "$zone"
        proto_close_data

        proto_send_update "$cfg"
}

proto_ipip_teardown() {
        local cfg="$1"
}

proto_ipip_init_config() {
        no_device=1
        available=1

        proto_config_add_int "mtu"
        proto_config_add_int "ttl"
        proto_config_add_string "tos"
        proto_config_add_string "tunlink"
        proto_config_add_string "zone"
        proto_config_add_string "ipaddr"
        proto_config_add_string "peeraddr"
        proto_config_add_boolean "df"
}

[ -n "$INCLUDE_ONLY" ] || {
        add_protocol ipip
}