157 lines
3.9 KiB
Go
157 lines
3.9 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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"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 SRV struct {
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Target string `json:"target"`
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Port uint16 `json:"port"`
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Weight uint16 `json:"weight"`
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Priority uint16 `json:"priority"`
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}
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func (s *SRV) GetNbResources() int {
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return 1
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}
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func (s *SRV) GenComment(origin string) string {
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return fmt.Sprintf("%s:%d", strings.TrimSuffix(s.Target, "."+origin), s.Port)
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}
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func (s *SRV) GenRRs(domain string, ttl uint32, origin string) (rrs models.Records) {
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rr := utils.NewRecordConfig(domain, "SRV", ttl, origin)
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rr.SrvPriority = s.Priority
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rr.SrvWeight = s.Weight
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rr.SrvPort = s.Port
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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 ParseSRV(record *models.RecordConfig) (ret *SRV) {
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if record.Type == "SRV" {
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ret = &SRV{
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Priority: record.SrvPriority,
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Weight: record.SrvWeight,
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Port: record.SrvPort,
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Target: record.GetTargetField(),
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}
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}
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return
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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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Name string `json:"name"`
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Proto string `json:"proto"`
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SRV []*SRV `json:"srv"`
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}
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func (s *UnknownSRV) GetNbResources() int {
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return len(s.SRV)
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}
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func (s *UnknownSRV) GenComment(origin string) string {
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return fmt.Sprintf("%s (%s)", s.Name, s.Proto)
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}
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func (s *UnknownSRV) GenRRs(domain string, ttl uint32, origin string) (rrs models.Records) {
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for _, service := range s.SRV {
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rrs = append(rrs, service.GenRRs(utils.DomainJoin(fmt.Sprintf("_%s._%s", s.Name, s.Proto), domain), ttl, origin)...)
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}
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return
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}
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func srv_analyze(a *Analyzer) error {
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srvDomains := map[string]map[string]*UnknownSRV{}
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for _, record := range a.SearchRR(AnalyzerRecordFilter{Type: dns.TypeSRV}) {
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subdomains := SRV_DOMAIN.FindStringSubmatch(record.NameFQDN)
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if srv := ParseSRV(record); len(subdomains) == 4 && srv != nil {
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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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Name: subdomains[1],
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Proto: subdomains[2],
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}
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}
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srvDomains[domain][svc].SRV = append(srvDomains[domain][svc].SRV, srv)
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a.UseRR(
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record,
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subdomains[3],
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srvDomains[domain][svc],
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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 init() {
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RegisterService(
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func() happydns.Service {
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return &UnknownSRV{}
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},
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srv_analyze,
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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: 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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