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discover.go
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discover.go
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package eiscp
import (
"context"
"strings"
"time"
"github.com/brutella/dnssd"
)
func Discover() (string, error) {
discovered := ""
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
found := func(e dnssd.BrowseEntry) {
if strings.Contains(e.Name, "@Onkyo") {
// look through the list of IPs, pick something IPv4, IPV6 doesn't seem to work
for _, ipa := range e.IPs {
if ipa.To4() != nil {
discovered = ipa.String()
cancel()
return
}
}
}
}
if err := dnssd.LookupType(ctx, "_raop._tcp.local.", found, reject); err != nil {
if err.Error() != "context canceled" {
ologger.Printf("discovery: %v\n", err)
return discovered, err
}
}
return discovered, nil
}
func reject(e dnssd.BrowseEntry) {
ologger.Printf("dnssd-lookup: %+v", e)
}