122 lines
3.6 KiB
Go
122 lines
3.6 KiB
Go
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
package cli
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"net"
|
|
|
|
"git.froth.zone/sam/awl/internal/helpers"
|
|
"git.froth.zone/sam/awl/logawl"
|
|
"github.com/miekg/dns"
|
|
)
|
|
|
|
// CLI options structure.
|
|
type Options struct {
|
|
Logger *logawl.Logger // Logger
|
|
Port int // DNS port
|
|
IPv4 bool // Force IPv4
|
|
IPv6 bool // Force IPv6
|
|
TCP bool // Query with TCP
|
|
DNSCrypt bool // Query over DNSCrypt
|
|
TLS bool // Query over TLS
|
|
HTTPS bool // Query over HTTPS
|
|
QUIC bool // Query over QUIC
|
|
Truncate bool // Ignore truncation
|
|
ShowQuery bool // Show query before being sent
|
|
AA bool // Set Authoratative Answer
|
|
AD bool // Set Authenticated Data
|
|
CD bool // Set CD
|
|
QR bool // Set QueRy
|
|
RD bool // Set Recursion Desired
|
|
RA bool // Set Recursion Available
|
|
TC bool // Set TC (TrunCated)
|
|
Z bool // Set Z (Zero)
|
|
Reverse bool // Make reverse query
|
|
Verbosity int // Set logawl verbosity
|
|
HumanTTL bool // Make TTL human readable
|
|
ShowTTL bool // Display TTL
|
|
Short bool // Short output
|
|
Identify bool // If short, add identity stuffs
|
|
JSON bool // Outout as JSON
|
|
XML bool // Output as XML
|
|
YAML bool // Output at YAML
|
|
|
|
Display Displays // Display options
|
|
Request helpers.Request // DNS reuqest
|
|
EDNS // EDNS
|
|
}
|
|
|
|
// 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
|
|
}
|
|
|
|
type EDNS struct {
|
|
EnableEDNS bool // Enable EDNS
|
|
Cookie bool // Enable EDNS cookie
|
|
DNSSEC bool // Enable DNSSEC
|
|
BufSize uint16 // Set UDP buffer size
|
|
Version uint8 // Set EDNS version
|
|
Expire bool // Set EDNS expiration
|
|
KeepOpen bool // TCP keep alive
|
|
Nsid bool // Show EDNS nsid
|
|
ZFlag uint16 // EDNS flags
|
|
Padding bool // EDNS padding
|
|
Subnet dns.EDNS0_SUBNET // EDNS Subnet (duh)
|
|
}
|
|
|
|
// 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("subnet parsing error %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
|
|
}
|
|
|
|
var ErrNotError = errors.New("not an error")
|
|
|
|
var errNoArg = errors.New("no argument given")
|
|
|
|
type errInvalidArg struct {
|
|
arg string
|
|
}
|
|
|
|
func (e *errInvalidArg) Error() string {
|
|
return fmt.Sprintf("digflags: invalid argument %s", e.arg)
|
|
}
|