;;; Tyreunom's system administration and configuration tools.

;;;

;;; Copyright © 2019 Julien Lepiller <julien@lepiller.eu>

;;;

;;; This program is free software: you can redistribute it and/or modify

;;; it under the terms of the GNU General Public License as published by

;;; the Free Software Foundation, either version 3 of the License, or

;;; (at your option) any later version.

;;;

;;; This program is distributed in the hope that it will be useful,

;;; but WITHOUT ANY WARRANTY; without even the implied warranty of

;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

;;; GNU General Public License for more details.

;;;

;;; You should have received a copy of the GNU General Public License

;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.

;;

;; DNS services

;;

(define-module (config dns)

  #:use-module (data dns)

  #:use-module (gnu services)

  #:use-module (gnu services dns)

  #:use-module (srfi srfi-1)

  #:use-module (ice-9 textual-ports)

  #:export (ipv4-reverse-master-zone

            ipv6-reverse-master-zone

            lepiller-master-zone

            lepiller-slave-zone

            master-acl

            slave-acl

            hermes

            ene))

(define public-dkim

  (apply

    string-append

    (string-split

      (call-with-input-file "/etc/mail/dkim/public.key" get-string-all)

      #\newline)))

(define-zone-entries lepiller.eu.zone

;; Name         TTL Class Type Data

  ("ene"        ""  "IN"  "A"     ene-ip4)

  ("hermes"     ""  "IN"  "A"     hermes-ip4)

  ("hermes"     ""  "IN"  "AAAA"  hermes-ip6)

  ("xana"       ""  "IN"  "A"     xana-ip4)

  ("@"          ""  "IN"  "A"     hermes-ip4)

  ("@"          ""  "IN"  "AAAA"  hermes-ip6)

  ("www"        ""  "IN"  "CNAME" "lepiller.eu.")

  ("avatar"     ""  "IN"  "CNAME" "ene")

  ("rennes"     ""  "IN"  "CNAME" "ene")

  ("nani"       ""  "IN"  "CNAME" "xana")

  ("i18n"       ""  "IN"  "CNAME" "xana")

  ("@"          ""  "IN"  "NS"    "ns")

  ("@"          ""  "IN"  "NS"    "ns2")

  ("ns"         ""  "IN"  "A"     hermes-ip4)

  ("ns"         ""  "IN"  "AAAA"  hermes-ip6)

  ("ns2"        ""  "IN"  "A"     ene-ip4)

  ("@"          ""  "IN"  "MX"    "10 courriel")

  ("@"          ""  "IN"  "MX"    "50 b.courriel")

  ("b.courriel" ""  "IN"  "A"     hermes-ip4)

  ("b.courriel" ""  "IN"  "AAAA"  hermes-ip6)

  ("courriel"   ""  "IN"  "A"     ene-ip4)

  ("imap"       ""  "IN"  "CNAME" "courriel")

  ("smtp"       ""  "IN"  "CNAME" "b.courriel")

  ("@"          ""  "IN"  "TXT"   "v=spf1 mx a ~all")

  ("@"          ""  "IN"  "SPF"   "v=spf1 mx a ~all")

  ("dkim._domainkey" "" "IN" "TXT" (string-append "v=DKIM1; p=" public-dkim "; s=email; t=s")))

(define-zone-entries ipv4-reverse.zone

  ("@" "" "IN" "PTR" "lepiller.eu.")

  ("@"          ""  "IN"  "NS"    "ns.lepiller.eu.")

  ("@"          ""  "IN"  "NS"    "ns2.lepiller.eu."))

(define-zone-entries ipv6-reverse.zone

  ("1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0" "" "IN" "PTR" "lepiller.eu.")

  ("@"          ""  "IN"  "NS"    "ns.lepiller.eu.")

  ("@"          ""  "IN"  "NS"    "ns2.lepiller.eu."))

(define ene

  (knot-remote-configuration

    (id "ene")

    (address (list ene-ip4))

    (key "lepiller-key")))

(define hermes

  (knot-remote-configuration

    (id "hermes")

    (address (list hermes-ip4))

    (key "lepiller-key")))

(define master-acl

  (knot-acl-configuration

    (id "master-acl")

    (address (list hermes-ip4))

    (key '("lepiller-key"))

    (action '(transfer))))

(define slave-acl

  (knot-acl-configuration

    (id "slave-acl")

    (address (list ene-ip4))

    (key '("lepiller-key"))

    (action '(notify))))

(define lepiller-master-zone

  (knot-zone-configuration

    (domain "lepiller.eu")

    (notify '("hermes"))

    (dnssec-policy "default")

    (acl '("master-acl"))

    (zonefile-load 'difference)

    (zone (zone-file

            (origin "lepiller.eu")

            (entries lepiller.eu.zone)

            (serial 2019072401)))))

(define lepiller-slave-zone

  (knot-zone-configuration

    (domain "lepiller.eu")

    (acl '("slave-acl"))

    (master '("ene"))))

(define ipv6-reverse-master-zone

  (let* ((ip6 (string->list (substring (string-delete hermes-ip6 #\:) 0 12)))

         (rev-ip6-lst (fold (lambda (elem acc)

                          (cons* #\. elem acc))

                        '()

                        ip6))

         (rev-ip6 (list->string (cdr rev-ip6-lst)))

         (domain (string-append rev-ip6 ".ip6.arpa")))

    (knot-zone-configuration

      (domain domain)

      (zone (zone-file

              (origin domain)

              (entries ipv6-reverse.zone)

              (ns "ns.lepiller.eu.")

              (mail "hostmaster.lepiller.eu.")

              (serial 1))))))

(define ipv4-reverse-master-zone

  (let ((domain (string-append

                  (string-join (reverse (string-split hermes-ip4 #\.)) ".")

                  ".in-addr.arpa")))

    (knot-zone-configuration

      (domain domain)

      (zone (zone-file

              (origin domain)

              (entries ipv4-reverse.zone)

              (ns "ns.lepiller.eu.")

              (mail "hostmaster.lepiller.eu.")

              (serial 1))))))