golang net module(LookupSRV) - go

Question

I'm very new to golang, I have some experience with python but not on this level per say. I am creating an application that's called "digall", making it easy for a user to see active dns-records when checking a domain name.
In the application I am using LookupSRV, which I seem to have some issues with:
func srvRecord(query string) {
service := "sipfederationtls"
protocol:= "tcp"
fmt.Printf("\n[+] SRV Record(s)\n")
//srvMap := ["sipfederationtls", "autodiscover", "VLMCS"]
cname, addresses, err := net.LookupSRV(service, protocol, query)
if err != nil {
fmt.Printf("[!] This feature is currently under development, thus not ready yet.\n")
}
fmt.Printf("cname : %s \n", cname)
for i := 0; i < len(addresses); i++ {
fmt.Printf("addrs[%d].Target : %s \n", i, addresses[i].Target)
fmt.Printf("addrs[%d].Port : %d \n", i, addresses[i].Port)
fmt.Printf("addrs[%d].Priority : %d \n", i, addresses[i].Priority)
fmt.Printf("addrs[%d].Weight : %d \n", i, addresses[i].Weight)
}
}
As you can see the variable "service" serves as the prefix of the SRV record. My only problem is that i want to check multiple prefixes of this record, namely "sipfederationtls", "autodiscover" and "VLMCS".
What I am asking is; How to i make this function swift through these prefixes and return the ones that work? (the ones that error out will be handled by err by my fantastic error message)
I am aware that this is a noob question, and like I said I am very new to golang. I would appreciate any tips you guys could give me.
Here is the full source of the application: http://dpaste.com/3X24ZYR
Thank you.

Answer 1

You can't query multiple services at once using LookupSRV method, as you can't use dig for querying several services at once.
You better create a slice of the services' names:
services := [...]string{"service1", "service2", "service3")
And then iterate over it and call LookupSRV for each service:
for _, service := range services {
cname , addrs, err := net.LookupSRV(service, "tcp", "your.domain.name")
// error handlling
}
Also when iterating over the lookup result, it is better to use the range keyword:
for _, record := range addrs {
fmt.Printf("Target: %s:%d\n", record.Target, record.Port)
}