133 lines
2.7 KiB
Go
133 lines
2.7 KiB
Go
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
package main
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"math/rand"
|
|
"os"
|
|
"strings"
|
|
"time"
|
|
|
|
cli "git.froth.zone/sam/awl/cmd"
|
|
"git.froth.zone/sam/awl/pkg/query"
|
|
"git.froth.zone/sam/awl/pkg/util"
|
|
"github.com/miekg/dns"
|
|
)
|
|
|
|
var version = "DEV"
|
|
|
|
func main() {
|
|
if opts, code, err := run(os.Args); err != nil {
|
|
// TODO: Make not ew
|
|
if errors.Is(err, util.ErrNotError) || strings.Contains(err.Error(), "help requested") {
|
|
os.Exit(0)
|
|
} else {
|
|
opts.Logger.Error(err)
|
|
os.Exit(code)
|
|
}
|
|
}
|
|
}
|
|
|
|
func run(args []string) (opts *util.Options, code int, err error) {
|
|
//nolint:gosec //Secure source not needed
|
|
r := rand.New(rand.NewSource(time.Now().Unix()))
|
|
|
|
opts, err = cli.ParseCLI(args, version)
|
|
if err != nil {
|
|
return opts, 1, fmt.Errorf("parse: %w", err)
|
|
}
|
|
|
|
var (
|
|
resp util.Response
|
|
keepTracing bool
|
|
tempDomain string
|
|
tempQueryType uint16
|
|
)
|
|
|
|
for ok := true; ok; ok = keepTracing {
|
|
if keepTracing {
|
|
opts.Request.Name = tempDomain
|
|
opts.Request.Type = tempQueryType
|
|
} else {
|
|
tempDomain = opts.Request.Name
|
|
tempQueryType = opts.Request.Type
|
|
|
|
// Override the query because it needs to be done
|
|
opts.Request.Name = "."
|
|
opts.Request.Type = dns.TypeNS
|
|
}
|
|
// Retry queries if a query fails
|
|
for i := 0; i <= opts.Request.Retries; i++ {
|
|
resp, err = query.CreateQuery(opts)
|
|
if err == nil {
|
|
keepTracing = opts.Trace && (!resp.DNS.Authoritative || opts.Request.Name == ".")
|
|
|
|
break
|
|
} else if i != opts.Request.Retries {
|
|
opts.Logger.Warn("Retrying request, error:", err)
|
|
}
|
|
}
|
|
|
|
// Query failed, make it fail
|
|
if err != nil {
|
|
return opts, 9, fmt.Errorf("query: %w", err)
|
|
}
|
|
|
|
var str string
|
|
if opts.JSON || opts.XML || opts.YAML {
|
|
str, err = query.PrintSpecial(resp, opts)
|
|
if err != nil {
|
|
return opts, 10, fmt.Errorf("format print: %w", err)
|
|
}
|
|
} else {
|
|
str, err = query.ToString(resp, opts)
|
|
if err != nil {
|
|
return opts, 15, fmt.Errorf("standard print: %w", err)
|
|
}
|
|
}
|
|
|
|
fmt.Println(str)
|
|
|
|
if keepTracing {
|
|
var nothing []dns.RR
|
|
|
|
if opts.Request.Name == "." {
|
|
nothing = resp.DNS.Answer
|
|
} else {
|
|
nothing = resp.DNS.Ns
|
|
}
|
|
|
|
want := func(rr dns.RR) bool {
|
|
temp := strings.Split(rr.String(), "\t")
|
|
|
|
return temp[len(temp)-2] == "NS"
|
|
}
|
|
|
|
i := 0
|
|
|
|
for _, x := range nothing {
|
|
if want(x) {
|
|
nothing[i] = x
|
|
i++
|
|
}
|
|
}
|
|
|
|
nothing = nothing[:i]
|
|
nothing2 := nothing[r.Intn(len(nothing))]
|
|
|
|
v := strings.Split(nothing2.String(), "\t")
|
|
opts.Request.Server = strings.TrimSuffix(v[len(v)-1], ".")
|
|
|
|
opts.TLS = false
|
|
opts.HTTPS = false
|
|
opts.QUIC = false
|
|
|
|
opts.RD = false
|
|
opts.Request.Port = 53
|
|
}
|
|
}
|
|
|
|
return opts, 0, nil
|
|
}
|