Fix Reach services discovery

- Use github.com/grandcat/zeroconf lib instead of github.com/oleksandr/bonjour
This commit is contained in:
wpetit 2018-10-16 15:23:16 +02:00
parent 9bd20331ef
commit 187d53fd29
5 changed files with 77 additions and 42 deletions

View File

@ -1,65 +1,52 @@
package emlid
import (
"context"
"net"
"sync"
"time"
"github.com/oleksandr/bonjour"
"github.com/grandcat/zeroconf"
)
// Service is a ReachRS service discovered via MDNS-SD
type Service struct {
Name string
AddrV4 net.IP
AddrV4 *net.IP
Port int
}
// Discover tries to discover ReachRS services on the local network via MDNS-SD
func Discover(timeout time.Duration) ([]Service, error) {
// Discover tries to discover ReachRS services on the local network via mDNS-SD
func Discover(ctx context.Context) ([]Service, error) {
var wg sync.WaitGroup
wg.Add(1)
resolver, err := bonjour.NewResolver(nil)
resolver, err := zeroconf.NewResolver(nil)
if err != nil {
return nil, err
}
services := make([]Service, 0)
entries := make(chan *bonjour.ServiceEntry)
timer := time.NewTimer(timeout)
defer timer.Stop()
stop := func() {
resolver.Exit <- true
wg.Done()
}
entries := make(chan *zeroconf.ServiceEntry)
go func() {
for {
select {
case e, ok := <-entries:
if !ok {
stop()
return
for e := range entries {
var addr *net.IP
if len(e.AddrIPv4) > 0 {
addr = &e.AddrIPv4[0]
}
services = append(services, Service{
srv := Service{
Name: e.Instance,
AddrV4: e.AddrIPv4,
AddrV4: addr,
Port: e.Port,
})
case <-timer.C:
stop()
return
}
services = append(services, srv)
}
wg.Done()
}()
if err = resolver.Browse("_reach._tcp", ".local", entries); err != nil {
if err = resolver.Browse(ctx, "_reach._tcp", ".local", entries); err != nil {
return nil, err
}

View File

@ -1,6 +1,7 @@
package emlid
import (
"context"
"testing"
"time"
)
@ -11,7 +12,10 @@ func TestDiscovery(t *testing.T) {
t.Skip("To run this test, use: go test -discovery-integration")
}
services, err := Discover(3 * time.Second)
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
services, err := Discover(ctx)
if err != nil {
t.Fatal(err)
}

41
example/discovery/main.go Normal file
View File

@ -0,0 +1,41 @@
package main
import (
"context"
"flag"
"log"
"time"
"forge.cadoles.com/Pyxis/orion/emlid"
)
var (
timeout = 5 * time.Second
)
func init() {
flag.DurationVar(&timeout, "timeout", timeout, "mDNS scan timeout")
}
func main() {
flag.Parse()
log.Println("Searching for ReachRS services on network...")
ctx, cancel := context.WithTimeout(context.Background(), timeout)
defer cancel()
services, err := emlid.Discover(ctx)
if err != nil {
log.Fatal(err)
}
for _, s := range services {
log.Println("Found:")
log.Printf(" Name: '%s'", s.Name)
log.Printf(" Hosts: %s", s.AddrV4)
log.Printf(" Port: '%d'", s.Port)
}
}

7
go.mod
View File

@ -2,13 +2,14 @@ module forge.cadoles.com/Pyxis/orion
require (
forge.cadoles.com/Pyxis/golang-socketio v0.0.0-20180919100209-bb857ced6b95
github.com/caarlos0/env v3.3.0+incompatible
github.com/caarlos0/env v3.4.0+incompatible
github.com/cenkalti/backoff v2.0.0+incompatible // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/go-chi/chi v3.3.3+incompatible
github.com/gorilla/websocket v1.4.0 // indirect
github.com/grandcat/zeroconf v0.0.0-20180329153754-df75bb3ccae1
github.com/miekg/dns v1.0.12 // indirect
github.com/mitchellh/mapstructure v1.0.0
github.com/oleksandr/bonjour v0.0.0-20160508152359-5dcf00d8b228
github.com/mitchellh/mapstructure v1.1.2
github.com/pkg/errors v0.8.0
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/stretchr/testify v1.2.2 // indirect

14
go.sum
View File

@ -1,19 +1,21 @@
forge.cadoles.com/Pyxis/golang-socketio v0.0.0-20180919100209-bb857ced6b95 h1:o3G5+9RjczCK1xAYFaRMknk1kY9Ule6PNfiW6N6hEpg=
forge.cadoles.com/Pyxis/golang-socketio v0.0.0-20180919100209-bb857ced6b95/go.mod h1:I6kYOFWNkFlNeQLI7ZqfTRz4NdPHZxX0Bzizmzgchs0=
github.com/caarlos0/env v3.3.0+incompatible h1:jCfY0ilpzC2FFViyZyDKCxKybDESTwaR+ebh8zm6AOE=
github.com/caarlos0/env v3.3.0+incompatible/go.mod h1:tdCsowwCzMLdkqRYDlHpZCp2UooDD3MspDBjZ2AD02Y=
github.com/caarlos0/env v3.4.0+incompatible h1:FRwBdvENjLHZoUbFnULnFss9wKtcapdaM35DfxiTjeM=
github.com/caarlos0/env v3.4.0+incompatible/go.mod h1:tdCsowwCzMLdkqRYDlHpZCp2UooDD3MspDBjZ2AD02Y=
github.com/cenkalti/backoff v2.0.0+incompatible h1:5IIPUHhlnUZbcHQsQou5k1Tn58nJkeJL9U+ig5CHJbY=
github.com/cenkalti/backoff v2.0.0+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/go-chi/chi v3.3.3+incompatible h1:KHkmBEMNkwKuK4FdQL7N2wOeB9jnIx7jR5wsuSBEFI8=
github.com/go-chi/chi v3.3.3+incompatible/go.mod h1:eB3wogJHnLi3x/kFX2A+IbTBlXxmMeXJVKy9tTv1XzQ=
github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q=
github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
github.com/grandcat/zeroconf v0.0.0-20180329153754-df75bb3ccae1 h1:VSELJSxQlpi1bz4ZwT+93hPpzNLRcgytLr77iVRJpcE=
github.com/grandcat/zeroconf v0.0.0-20180329153754-df75bb3ccae1/go.mod h1:YjKB0WsLXlMkO9p+wGTCoPIDGRJH0mz7E526PxkQVxI=
github.com/miekg/dns v1.0.12 h1:814rTNaw7Q7pGncpSEDT06YS8rdGmpUEnKgpQzctJsk=
github.com/miekg/dns v1.0.12/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
github.com/mitchellh/mapstructure v1.0.0 h1:vVpGvMXJPqSDh2VYHF7gsfQj8Ncx+Xw5Y1KHeTRY+7I=
github.com/mitchellh/mapstructure v1.0.0/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
github.com/oleksandr/bonjour v0.0.0-20160508152359-5dcf00d8b228 h1:Cvfd2dOlXIPTeEkOT/h8PyK4phBngOM4at9/jlgy7d4=
github.com/oleksandr/bonjour v0.0.0-20160508152359-5dcf00d8b228/go.mod h1:MGuVJ1+5TX1SCoO2Sx0eAnjpdRytYla2uC1YIZfkC9c=
github.com/mitchellh/mapstructure v1.1.2 h1:fmNYVwqnSfB9mZU6OS2O6GsXM+wcskZDuKQzvN1EDeE=
github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=