Sam
4cf19ebf78
All checks were successful
continuous-integration/drone/push Build is passing
I need to make fewer of these :) Reviewed-on: #61
113 lines
2.3 KiB
Go
113 lines
2.3 KiB
Go
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
package util
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
|
|
"git.froth.zone/sam/awl/logawl"
|
|
"github.com/miekg/dns"
|
|
)
|
|
|
|
// Options is the grand CLI options structure.
|
|
type Options struct {
|
|
Logger *logawl.Logger
|
|
TLSHost string
|
|
EDNS
|
|
Request Request
|
|
Port int
|
|
Verbosity int
|
|
Display Displays
|
|
TC bool
|
|
ShowTTL bool
|
|
ShowQuery bool
|
|
AA bool
|
|
AD bool
|
|
CD bool
|
|
QR bool
|
|
RD bool
|
|
RA bool
|
|
IPv4 bool
|
|
Z bool
|
|
Reverse bool
|
|
HumanTTL bool
|
|
Truncate bool
|
|
Short bool
|
|
Identify bool
|
|
JSON bool
|
|
XML bool
|
|
YAML bool
|
|
QUIC bool
|
|
HTTPS bool
|
|
TLSNoVerify bool
|
|
TLS bool
|
|
DNSCrypt bool
|
|
TCP bool
|
|
IPv6 bool
|
|
}
|
|
|
|
// Displays contains toggles for what to (and not to) display.
|
|
type Displays struct {
|
|
Comments bool
|
|
Question bool // QUESTION SECTION
|
|
Opt bool // OPT PSEUDOSECTION
|
|
Answer bool // ANSWER SECTION
|
|
Authority bool // AUTHORITY SECTION
|
|
Additional bool // ADDITIONAL SECTION
|
|
Statistics bool // Query time, message size, etc.
|
|
UcodeTranslate bool // Translate Punycode back to Unicode
|
|
}
|
|
|
|
// EDNS contains toggles for various EDNS options.
|
|
type EDNS struct {
|
|
Subnet dns.EDNS0_SUBNET
|
|
ZFlag uint16
|
|
BufSize uint16
|
|
EnableEDNS bool
|
|
Cookie bool
|
|
DNSSEC bool
|
|
Expire bool
|
|
KeepOpen bool
|
|
Nsid bool
|
|
Padding bool
|
|
Version uint8
|
|
}
|
|
|
|
// ParseSubnet takes a subnet argument and makes it into one that the DNS library
|
|
// understands.
|
|
func ParseSubnet(subnet string, opts *Options) error {
|
|
ip, inet, err := net.ParseCIDR(subnet)
|
|
if err != nil {
|
|
// TODO: make not a default?
|
|
if subnet == "0" {
|
|
opts.EDNS.Subnet = dns.EDNS0_SUBNET{
|
|
Code: dns.EDNS0SUBNET,
|
|
Family: 1,
|
|
SourceNetmask: 0,
|
|
SourceScope: 0,
|
|
Address: net.IPv4(0, 0, 0, 0),
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
return fmt.Errorf("EDNS subnet parsing: %w", err)
|
|
}
|
|
|
|
sub, _ := inet.Mask.Size()
|
|
opts.EDNS.Subnet = dns.EDNS0_SUBNET{}
|
|
opts.EDNS.Subnet.Address = ip
|
|
opts.EDNS.Subnet.SourceNetmask = uint8(sub)
|
|
|
|
switch ip.To4() {
|
|
case nil:
|
|
// Not a valid IPv4 so assume IPv6
|
|
opts.EDNS.Subnet.Family = 2
|
|
default:
|
|
// Valid IPv4
|
|
opts.EDNS.Subnet.Family = 1
|
|
}
|
|
|
|
return nil
|
|
}
|