119 lines
3.3 KiB
Go
119 lines
3.3 KiB
Go
// Copyright or © or Copr. happyDNS (2020)
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//
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// contact@happydns.org
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//
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// This software is a computer program whose purpose is to provide a modern
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// interface to interact with DNS systems.
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//
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// This software is governed by the CeCILL license under French law and abiding
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// by the rules of distribution of free software. You can use, modify and/or
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// redistribute the software under the terms of the CeCILL license as
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// circulated by CEA, CNRS and INRIA at the following URL
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// "http://www.cecill.info".
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//
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// As a counterpart to the access to the source code and rights to copy, modify
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// and redistribute granted by the license, users are provided only with a
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// limited warranty and the software's author, the holder of the economic
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// rights, and the successive licensors have only limited liability.
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//
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// In this respect, the user's attention is drawn to the risks associated with
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// loading, using, modifying and/or developing or reproducing the software by
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// the user in light of its specific status of free software, that may mean
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// that it is complicated to manipulate, and that also therefore means that it
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// is reserved for developers and experienced professionals having in-depth
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// computer knowledge. Users are therefore encouraged to load and test the
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// software's suitability as regards their requirements in conditions enabling
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// the security of their systems and/or data to be ensured and, more generally,
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// to use and operate it in the same conditions as regards security.
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//
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// The fact that you are presently reading this means that you have had
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// knowledge of the CeCILL license and that you accept its terms.
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package sources // import "happydns.org/sources"
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import (
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"github.com/miekg/dns"
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"git.happydns.org/happydns/model"
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"git.happydns.org/happydns/utils"
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)
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func DiffZones(a []dns.RR, b []dns.RR, skipDNSSEC bool) (toAdd []dns.RR, toDel []dns.RR) {
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loopDel:
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for _, rrA := range a {
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if skipDNSSEC && utils.IsDNSSECType(rrA.Header().Rrtype) {
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continue
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}
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for _, rrB := range b {
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if rrA.String() == rrB.String() {
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continue loopDel
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}
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}
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toDel = append(toDel, rrA)
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}
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loopAdd:
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for _, rrB := range b {
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if skipDNSSEC && utils.IsDNSSECType(rrB.Header().Rrtype) {
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continue
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}
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for _, rrA := range a {
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if rrB.String() == rrA.String() {
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continue loopAdd
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}
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}
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toAdd = append(toAdd, rrB)
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}
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return
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}
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func DiffZone(s happydns.Source, domain *happydns.Domain, rrs []dns.RR, skipDNSSEC bool) (toAdd []dns.RR, toDel []dns.RR, err error) {
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// Get the actuals RR-set
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var current []dns.RR
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current, err = s.ImportZone(domain)
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if err != nil {
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return
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}
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toAdd, toDel = DiffZones(current, rrs, skipDNSSEC)
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return
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}
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func ApplyZone(s happydns.Source, domain *happydns.Domain, rrs []dns.RR, skipDNSSEC bool) (*dns.SOA, error) {
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toAdd, toDel, err := DiffZone(s, domain, rrs, skipDNSSEC)
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if err != nil {
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return nil, err
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}
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var newSOA *dns.SOA
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// Apply diff
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for _, rr := range toDel {
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if rr.Header().Rrtype == dns.TypeSOA {
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continue
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}
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if err := s.DeleteRR(domain, rr); err != nil {
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return nil, err
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}
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}
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for _, rr := range toAdd {
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if rr.Header().Rrtype == dns.TypeSOA {
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newSOA = rr.(*dns.SOA)
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continue
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}
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if err := s.AddRR(domain, rr); err != nil {
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return nil, err
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}
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}
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// Update SOA record
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if newSOA != nil {
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err = s.UpdateSOA(domain, newSOA, false)
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}
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return newSOA, err
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}
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