147 lines
3.7 KiB
Go
147 lines
3.7 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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"strings"
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"github.com/StackExchange/dnscontrol/v4/models"
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"github.com/miekg/dns"
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"git.happydns.org/happyDomain/model"
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"git.happydns.org/happyDomain/utils"
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)
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type CNAME struct {
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Target string
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}
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func (s *CNAME) GetNbResources() int {
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return 1
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}
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func (s *CNAME) GenComment(origin string) string {
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return strings.TrimSuffix(s.Target, "."+origin)
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}
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func (s *CNAME) GenRRs(domain string, ttl uint32, origin string) (rrs models.Records) {
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rr := utils.NewRecordConfig(domain, "CNAME", ttl, origin)
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rr.SetTarget(utils.DomainFQDN(s.Target, origin))
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rrs = append(rrs, rr)
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return
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}
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type SpecialCNAME struct {
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SubDomain string
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Target string
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}
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func (s *SpecialCNAME) GetNbResources() int {
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return 1
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}
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func (s *SpecialCNAME) GenComment(origin string) string {
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return "(" + s.SubDomain + ") -> " + strings.TrimSuffix(s.Target, "."+origin)
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}
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func (s *SpecialCNAME) GenRRs(domain string, ttl uint32, origin string) (rrs models.Records) {
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rr := utils.NewRecordConfig(utils.DomainJoin(s.SubDomain, domain), "CNAME", ttl, origin)
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rr.SetTarget(utils.DomainFQDN(s.Target, origin))
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rrs = append(rrs, rr)
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return
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}
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func specialalias_analyze(a *Analyzer) error {
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// Try handle specials domains using CNAME
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for _, record := range a.SearchRR(AnalyzerRecordFilter{Type: dns.TypeCNAME, Prefix: "_"}) {
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subdomains := SRV_DOMAIN.FindStringSubmatch(record.NameFQDN)
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if record.Type == "CNAME" && len(subdomains) == 4 {
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a.UseRR(record, subdomains[3], &SpecialCNAME{
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SubDomain: fmt.Sprintf("_%s._%s", subdomains[1], subdomains[2]),
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Target: record.String(),
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})
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}
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}
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return nil
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}
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func alias_analyze(a *Analyzer) error {
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for _, record := range a.SearchRR(AnalyzerRecordFilter{Type: dns.TypeCNAME}) {
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if record.Type == "CNAME" {
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newrr := &CNAME{
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Target: strings.TrimSuffix(record.String(), "."+a.origin),
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}
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a.UseRR(record, record.NameFQDN, newrr)
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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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RegisterService(
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func() happydns.Service {
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return &SpecialCNAME{}
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},
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specialalias_analyze,
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ServiceInfos{
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Name: "SubAlias",
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Description: "A service alias to another domain/service.",
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Categories: []string{
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"internal",
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},
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Restrictions: ServiceRestrictions{
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NearAlone: true,
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NeedTypes: []uint16{
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dns.TypeCNAME,
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},
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},
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},
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99999997,
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)
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RegisterService(
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func() happydns.Service {
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return &CNAME{}
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},
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alias_analyze,
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ServiceInfos{
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Name: "Alias",
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Description: "Maps an alias to another (canonical) domain.",
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Categories: []string{
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"internal",
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},
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RecordTypes: []uint16{
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dns.TypeCNAME,
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},
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Restrictions: ServiceRestrictions{
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Alone: true,
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Single: true,
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NeedTypes: []uint16{
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dns.TypeCNAME,
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},
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},
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},
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99999998,
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)
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}
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