64 lines
1.2 KiB
Go
64 lines
1.2 KiB
Go
/*
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example is a short example program showing the detailed result from a lookup.
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*/
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package main
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import (
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"context"
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"fmt"
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"net"
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"os"
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"src.lwithers.me.uk/go/dnsxl"
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)
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var (
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xlist *dnsxl.XList
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)
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func main() {
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if len(os.Args) < 2 {
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fmt.Fprintln(os.Stderr, "Expecting one or more names/IPs to look up")
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os.Exit(1)
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}
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xlist = dnsxl.New(nil)
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xlist.AddServers("sbl.spamhaus.org", "xbl.spamhaus.org", "pbl.spamhaus.org")
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for i := 1; i < len(os.Args); i++ {
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lookup(os.Args[i])
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}
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}
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func lookup(name string) {
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fmt.Printf("==== %s ====\n", name)
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ips, err := net.DefaultResolver.LookupIP(context.Background(), "ip", name)
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switch {
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case err != nil:
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fmt.Printf("Failed to look up name: %v\n", err)
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return
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case len(ips) == 0:
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fmt.Println("No addresses found for name")
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return
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}
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for _, ip := range ips {
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fmt.Printf("--- %s\n", ip)
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res, err := xlist.LookupIP(ip)
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if err != nil {
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fmt.Printf("Failed to look up IP: %v\n", err)
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continue
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}
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for _, r := range res {
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switch {
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case r.Error != nil:
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fmt.Printf("%s\tError: %v\n", r.Server, r.Error)
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case r.InList:
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fmt.Printf("%s\tEntry in list (reason: %q)\n", r.Server, r.Reason)
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default:
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fmt.Printf("%s\tEntry not in list\n", r.Server)
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}
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}
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}
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}
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