Add Service Registration

[markjlorenz]

Adds service registration with dnssd.ServiceRegister

• Looks like dnssd_c.c was using spaces instead of tabs. I can put it back to spaces if that's better.
• You'll want to change example/test.go#L5 to point to your repository.
• I'm new-ish to Golang, and know almost nothing about C. I just copied your patterns. Feedback/criticism is appreciated.

[soh335]

Thank you for p-r. it seems to be good. But I found bug of my implementation.

here https://github.com/soh335/go-dnssd/blob/master/dnssd.go#L70 .

using only discover function, dont get a problem if deallocate context variable. However if calling register function case, should not deallocate it. Because deallocating it represents cancel registering to dns.

So I want to change api like this. https://github.com/soh335/go-dnssd/compare/feature;release_ctx?expand=1 . You require to call Release method to context expressly. And In this case, you can write register example like this.

func main() {
    ctx, err := RegisterService()
    if err != nil {
               panic(err)
    }
    defer ctx.Release()
    Discover()
}

func RegisterService() (*dnssd.Context, error) {
        txtRecords := map[string]string{
                "path": "/path-to-page.html",
        }

       rc := make(chan *dnssd.RegisterReply)
       ctx, err := dnssd.ServiceRegister(
               dnssd.DNSServiceFlagsSuppressUnusable,
               0,                // most applications will pass 0
                "My Server",
                "_http._tcp.",
               "",               // empty string ends up as local domain
               "",               // most applications do not specify a host
               3000,             // port the service is running on
                txtRecords,
                rc,
        )

       go dnssd.Process(ctx)

        if err != nil {
               return nil, err
        }

        registerReply, _ := <-rc
        fmt.Println("Register Reply: ", registerReply)
        return ctx, nil
 }

If you dont have problem, I plan to merge this branch to master . how about you ❓

[soh335]

Looks like dnssd_c.c was using spaces instead of tabs. I can put it back to spaces if that's better.

I prefer to use spaces for *.c file.

[markjlorenz]

If you dont have problem, I plan to merge this branch to master . how about you ❓

Makes sense. OK by me.

I prefer to use spaces for *.c file.

OK, I will put it back to spaces tonight (EST)

Thanks for looking at my pull request!

[soh335]

thanks i merged to master my branch. I wait your commits ( using spaces for *.c file, example/test.go update )

[markjlorenz]

Ok, everything should be ready to go:

markjlorenz@BabyGoat:go-dnssd(master|1m) → go run example/test.go
Register Reply:  &{My Server _http._tcp. 293693605.members.btmm.icloud.com.}
&{5 My Server _http._tcp. local.}
start resolve
&{5 My\032Server._http._tcp.local. BabyGoat.local. 3000 map[path:/path-to-page.html]}
&{5 My\032Server._http._tcp.local. 33 1 22 [0 0 0 0 184 11 8 65 97 98 121 71 111 97 116 5 108 111 99 97 108 0] 120}
&{0 0 47115 BabyGoat.local.}
&{5 BabyGoat.local. 10.0.1.5 120}
closed
markjlorenz@BabyGoat:go-dnssd(master|1m) →

[soh335]

thanks !!