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discoverer.go
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discoverer.go
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// Copyright (C) 2024 Satoshi Konno. All rights reserved.
//
// 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 matter
import (
"github.com/cybergarage/go-logger/log"
"github.com/cybergarage/go-mdns/mdns"
"github.com/cybergarage/go-mdns/mdns/dns"
)
const (
DNSSDServerType = "_matter._tcp"
)
// Discoverer represents a discoverer for commisionners.
type Discoverer struct {
*mdns.Client
}
// NewDiscoverer returns a new discoverer.
func NewDiscoverer() *Discoverer {
disc := &Discoverer{
Client: mdns.NewClient(),
}
return disc
}
// MessageReceived is a callback when a message is received.
func (disc *Discoverer) MessageReceived(msg *dns.Message) {
log.HexInfo(msg.Bytes())
}
// Start starts this discoverer.
func (disc *Discoverer) Start() error {
return disc.Client.Start()
}
// Stop stops this discoverer.
func (disc *Discoverer) Stop() error {
return disc.Client.Stop()
}
// Search searches commisioners.
// 5.4.3.3. Using Existing IP-bearing Network
// To discover a commissionable device over an existing IP-bearing network connection,
// the Commis sioner SHALL perform service discovery using DNS-SD as detailed in
// Section 4.3, “Discovery”, and more specifically in Section 4.3.1, “Commissionable Node Discovery”.
func (disc *Discoverer) Search() error {
services := []string{
DNSSDServerType,
}
err := disc.Query(mdns.NewQueryWithServices(services))
if err != nil {
return err
}
return nil
}