
Security News
Deno 2.2 Improves Dependency Management and Expands Node.js Compatibility
Deno 2.2 enhances Node.js compatibility, improves dependency management, adds OpenTelemetry support, and expands linting and task automation for developers.
github.com/oleksandr/bonjour
This is a simple Multicast DNS-SD (Apple Bonjour) library written in Golang. You can use it to discover services in the LAN. Pay attention to the infrastructure you are planning to use it (clouds or shared infrastructures usually prevent mDNS from functioning). But it should work in the most office, home and private environments.
IMPORTANT: It does NOT pretend to be a full & valid implementation of the RFC 6762 & RFC 6763, but it fulfils the requirements of its authors (we just needed service discovery in the LAN environment for our IoT products). The registration code needs a lot of improvements. This code was not tested for Bonjour conformance but have been manually verified to be working using built-in OSX utility /usr/bin/dns-sd
.
Here is an example how to browse services by their type:
package main
import (
"log"
"os"
"time"
"github.com/oleksandr/bonjour"
)
func main() {
resolver, err := bonjour.NewResolver(nil)
if err != nil {
log.Println("Failed to initialize resolver:", err.Error())
os.Exit(1)
}
results := make(chan *bonjour.ServiceEntry)
go func(results chan *bonjour.ServiceEntry, exitCh chan<- bool) {
for e := range results {
log.Printf("%s", e.Instance)
exitCh <- true
time.Sleep(1e9)
os.Exit(0)
}
}(results, resolver.Exit)
err = resolver.Browse("_foobar._tcp", "local.", results)
if err != nil {
log.Println("Failed to browse:", err.Error())
}
select {}
}
Here is an example of looking up service by service instance name:
package main
import (
"log"
"os"
"time"
"github.com/oleksandr/bonjour"
)
func main() {
resolver, err := bonjour.NewResolver(nil)
if err != nil {
log.Println("Failed to initialize resolver:", err.Error())
os.Exit(1)
}
results := make(chan *bonjour.ServiceEntry)
go func(results chan *bonjour.ServiceEntry, exitCh chan<- bool) {
for e := range results {
log.Printf("%s", e.Instance)
exitCh <- true
time.Sleep(1e9)
os.Exit(0)
}
}(results, resolver.Exit)
err = resolver.Lookup("DEMO", "_foobar._tcp", "", results)
if err != nil {
log.Println("Failed to browse:", err.Error())
}
select {}
}
Registering a service is as simple as the following:
package main
import (
"log"
"os"
"os/signal"
"time"
"github.com/oleksandr/bonjour"
)
func main() {
// Run registration (blocking call)
s, err := bonjour.Register("Foo Service", "_foobar._tcp", "", 9999, []string{"txtv=1", "app=test"}, nil)
if err != nil {
log.Fatalln(err.Error())
}
// Ctrl+C handling
handler := make(chan os.Signal, 1)
signal.Notify(handler, os.Interrupt)
for sig := range handler {
if sig == os.Interrupt {
s.Shutdown()
time.Sleep(1e9)
break
}
}
}
package main
import (
"log"
"os"
"os/signal"
"time"
"github.com/oleksandr/bonjour"
)
func main() {
// Run registration (blocking call)
s, err := bonjour.RegisterProxy("Proxy Service", "_foobar._tcp", "", 9999, "octopus", "10.0.0.111", []string{"txtv=1", "app=test"}, nil)
if err != nil {
log.Fatalln(err.Error())
}
// Ctrl+C handling
handler := make(chan os.Signal, 1)
signal.Notify(handler, os.Interrupt)
for sig := range handler {
if sig == os.Interrupt {
s.Shutdown()
time.Sleep(1e9)
break
}
}
}
FAQs
Unknown package
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Deno 2.2 enhances Node.js compatibility, improves dependency management, adds OpenTelemetry support, and expands linting and task automation for developers.
Security News
React's CRA deprecation announcement sparked community criticism over framework recommendations, leading to quick updates acknowledging build tools like Vite as valid alternatives.
Security News
Ransomware payment rates hit an all-time low in 2024 as law enforcement crackdowns, stronger defenses, and shifting policies make attacks riskier and less profitable.