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// SPDX-License-Identifier: GPL-3.0-or-later
package dnsquery
import (
"errors"
"fmt"
"github.com/netdata/netdata/go/go.d.plugin/agent/module"
"github.com/miekg/dns"
)
func (d *DNSQuery) verifyConfig() error {
if len(d.Domains) == 0 {
return errors.New("no domains specified")
}
if len(d.Servers) == 0 {
return errors.New("no servers specified")
}
if !(d.Network == "" || d.Network == "udp" || d.Network == "tcp" || d.Network == "tcp-tls") {
return fmt.Errorf("wrong network transport : %s", d.Network)
}
if d.RecordType != "" {
d.Warning("'record_type' config option is deprecated, use 'record_types' instead")
d.RecordTypes = append(d.RecordTypes, d.RecordType)
}
if len(d.RecordTypes) == 0 {
return errors.New("no record types specified")
}
return nil
}
func (d *DNSQuery) initRecordTypes() (map[string]uint16, error) {
types := make(map[string]uint16)
for _, v := range d.RecordTypes {
rtype, err := parseRecordType(v)
if err != nil {
return nil, err
}
types[v] = rtype
}
return types, nil
}
func (d *DNSQuery) initCharts() (*module.Charts, error) {
var charts module.Charts
for _, srv := range d.Servers {
for _, rtype := range d.RecordTypes {
cs := newDNSServerCharts(srv, d.Network, rtype)
if err := charts.Add(*cs...); err != nil {
return nil, err
}
}
}
return &charts, nil
}
func parseRecordType(recordType string) (uint16, error) {
var rtype uint16
switch recordType {
case "A":
rtype = dns.TypeA
case "AAAA":
rtype = dns.TypeAAAA
case "ANY":
rtype = dns.TypeANY
case "CNAME":
rtype = dns.TypeCNAME
case "MX":
rtype = dns.TypeMX
case "NS":
rtype = dns.TypeNS
case "PTR":
rtype = dns.TypePTR
case "SOA":
rtype = dns.TypeSOA
case "SPF":
rtype = dns.TypeSPF
case "SRV":
rtype = dns.TypeSRV
case "TXT":
rtype = dns.TypeTXT
default:
return 0, fmt.Errorf("unknown record type : %s", recordType)
}
return rtype, nil
}
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