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//go:build ignore
// +build ignore
// Command line tool to perform SPF checks.
//
// For development and experimentation only.
// No backwards compatibility guarantees.
package main
import (
"context"
"flag"
"fmt"
"net"
"os"
"blitiri.com.ar/go/spf"
)
var (
debug = flag.Bool("debug", false, "include debugging output")
dnsAddr = flag.String("dns_addr", "", "address of the DNS server to use")
)
func main() {
flag.Usage = func() {
fmt.Printf("Usage: spf-check [options] 1.2.3.4 name@sender.com\n\n")
flag.PrintDefaults()
}
flag.Parse()
args := flag.Args()
if len(args) < 2 {
flag.Usage()
os.Exit(1)
}
opts := []spf.Option{}
if *debug {
traceF := func(f string, a ...interface{}) {
fmt.Printf("debug: "+f+"\n", a...)
}
opts = append(opts, spf.WithTraceFunc(traceF))
}
if *dnsAddr != "" {
dialFunc := func(ctx context.Context, network, addr string) (net.Conn, error) {
return (&net.Dialer{}).DialContext(ctx, network, *dnsAddr)
}
opts = append(opts, spf.WithResolver(
&net.Resolver{
PreferGo: true,
Dial: dialFunc,
}))
}
ip := net.ParseIP(args[0])
sender := args[1]
fmt.Printf("Sender: %v\n", sender)
fmt.Printf("IP: %v\n", ip)
r, err := spf.CheckHostWithSender(ip, "", sender, opts...)
fmt.Printf("Result: %v\n", r)
fmt.Printf("Error: %v\n", err)
}
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