jrouter/config.go

/*
   Copyright 2024 Josh Deprez

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

package main

import (
	"os"

	"github.com/sfiera/multitalk/pkg/ddp"
	"gopkg.in/yaml.v3"
)

type config struct {
	// Optional: default is 387.
	ListenPort uint16 `yaml:"listen_port"`

	// Sets the Domain Identifier used by this router.
	// Note: this does not "bind" the IP side of the router to a particular
	// interface; it will listen on all interfaces with IP addresses.
	// Optional: defaults to the first global unicast address on any local
	// network interface.
	LocalIP string `yaml:"local_ip"`

	// Required for routing a local EtherTalk network.
	EtherTalk struct {
		EthAddr  string      `yaml:"ethernet_addr"`
		Device   string      `yaml:"device"`
		ZoneName string      `yaml:"zone_name"`
		NetStart ddp.Network `yaml:"net_start"`
		NetEnd   ddp.Network `yaml:"net_end"`
	} `yaml:"ethertalk"`

	// LocalTalk struct {
	//	ZoneName   string `yaml:"zone_name"`
	// 	Network uint16 `yaml:"network"`
	// } `yaml:"localtalk"`

	// Allow routers other than those listed under peers?
	OpenPeering bool `yaml:"open_peering"`

	// List of peer routers.
	Peers []string `yaml:"peers"`
}

func loadConfig(cfgPath string) (*config, error) {
	f, err := os.Open(cfgPath)
	if err != nil {
		return nil, err
	}
	defer f.Close()

	c := new(config)
	if err := yaml.NewDecoder(f).Decode(c); err != nil {
		return nil, err
	}

	if c.ListenPort == 0 {
		c.ListenPort = 387
	}

	return c, nil
}