Pierre-Olivier Mercier
1523b549d2
Several service analyzers were silently discarding errors returned by a.UseRR(), unlike txt.go and others that properly checked them. This could mask issues like double-claimed records during zone analysis.
121 lines
3.1 KiB
Go
121 lines
3.1 KiB
Go
// This file is part of the happyDomain (R) project.
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// Copyright (c) 2020-2024 happyDomain
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// Authors: Pierre-Olivier Mercier, et al.
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//
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// This program is offered under a commercial and under the AGPL license.
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// For commercial licensing, contact us at <contact@happydomain.org>.
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//
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// For AGPL licensing:
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package svcs
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import (
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"fmt"
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"regexp"
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"github.com/miekg/dns"
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"git.happydns.org/happyDomain/internal/helpers"
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svc "git.happydns.org/happyDomain/internal/service"
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"git.happydns.org/happyDomain/model"
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)
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var (
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SRV_DOMAIN = regexp.MustCompile(`^_([^.]+)\._(tcp|udp)(?:\.(.*))?$`)
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)
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type UnknownSRV struct {
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Records []*dns.SRV `json:"srv"`
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}
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func (s *UnknownSRV) GetNbResources() int {
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return len(s.Records)
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}
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func (s *UnknownSRV) GenComment() string {
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if len(s.Records) == 0 {
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return ""
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}
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subdomains := SRV_DOMAIN.FindStringSubmatch(s.Records[0].Hdr.Name)
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return fmt.Sprintf("%s (%s)", subdomains[1], subdomains[2])
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}
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func (s *UnknownSRV) GetRecords(domain string, ttl uint32, origin string) ([]happydns.Record, error) {
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rrs := make([]happydns.Record, len(s.Records))
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for i, srv := range s.Records {
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rrs[i] = srv
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}
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return rrs, nil
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}
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func srv_analyze(a *svc.Analyzer) error {
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srvDomains := map[string]map[string]*UnknownSRV{}
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for _, record := range a.SearchRR(svc.AnalyzerRecordFilter{Type: dns.TypeSRV}) {
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subdomains := SRV_DOMAIN.FindStringSubmatch(record.Header().Name)
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if len(subdomains) < 4 {
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continue
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}
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svc := subdomains[1] + "." + subdomains[2]
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domain := subdomains[3]
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if _, ok := srvDomains[domain]; !ok {
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srvDomains[domain] = map[string]*UnknownSRV{}
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}
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if _, ok := srvDomains[domain][svc]; !ok {
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srvDomains[domain][svc] = &UnknownSRV{}
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}
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srvDomains[domain][svc].Records = append(srvDomains[domain][svc].Records, helpers.RRRelativeSubdomain(record, a.GetOrigin(), domain).(*dns.SRV))
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if err := a.UseRR(
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record,
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subdomains[3],
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srvDomains[domain][svc],
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); err != nil {
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return err
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}
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}
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return nil
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}
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func init() {
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svc.RegisterService(
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func() happydns.ServiceBody {
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return &UnknownSRV{}
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},
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srv_analyze,
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happydns.ServiceInfos{
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Name: "Service Record",
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Description: "Indicates to dedicated software the existance of the given service in the domain.",
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Categories: []string{
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"service",
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},
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RecordTypes: []uint16{
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dns.TypeSRV,
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},
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Restrictions: happydns.ServiceRestrictions{
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NearAlone: true,
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NeedTypes: []uint16{
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dns.TypeSRV,
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},
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},
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},
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99999,
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)
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}
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