aboutsummaryrefslogtreecommitdiff
path: root/gnu/packages/dns.scm
blob: 3ea9d02b2804ddae96d3429e7a2c6786b172e9ee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Taylan Ulrich Bayırlı/Kammer <taylanbayirli@gmail.com>
;;; Copyright © 2016 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2016, 2017 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2016 John Darrington <jmd@gnu.org>
;;; Copyright © 2016 Nikita <nikita@n0.is>
;;; Copyright © 2016, 2017, 2018, 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2016, 2020 Marius Bakke <mbakke@fastmail.com>
;;; Copyright © 2017 Vasile Dumitrascu <va511e@yahoo.com>
;;; Copyright © 2017 Gregor Giesen <giesen@zaehlwerk.net>
;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
;;; Copyright © 2019 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019 Chris Marusich <cmmarusich@gmail.com>
;;; Copyright © 2019 Rutger Helling <rhelling@mykolab.com>
;;; Copyright © 2020 Pierre Langlois <pierre.langlois@gmx.com>
;;; Copyright © 2020 Arun Isaac <arunisaac@systemreboot.net>
;;; Copyright © 2020 Leo Famulari <leo@famulari.name>
;;; Copyright © 2020 Brice Waegeneire <brice@waegenei.re>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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.
;;;
;;; GNU Guix 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 GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages dns)
  #:use-module (gnu packages admin)
  #:use-module (gnu packages autotools)
  #:use-module (gnu packages base)
  #:use-module (gnu packages bash)
  #:use-module (gnu packages certs)
  #:use-module (gnu packages check)
  #:use-module (gnu packages databases)
  #:use-module (gnu packages documentation)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages crypto)
  #:use-module (gnu packages datastructures)
  #:use-module (gnu packages flex)
  #:use-module (gnu packages freedesktop)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages glib)
  #:use-module (gnu packages groff)
  #:use-module (gnu packages groff)
  #:use-module (gnu packages gtk)
  #:use-module (gnu packages libedit)
  #:use-module (gnu packages libevent)
  #:use-module (gnu packages libidn)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages lua)
  #:use-module (gnu packages ncurses)
  #:use-module (gnu packages nettle)
  #:use-module (gnu packages networking)
  #:use-module (gnu packages perl)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages protobuf)
  #:use-module (gnu packages python)
  #:use-module (gnu packages python-xyz)
  #:use-module (gnu packages shells)
  #:use-module (gnu packages sphinx)
  #:use-module (gnu packages swig)
  #:use-module (gnu packages tls)
  #:use-module (gnu packages web)
  #:use-module (gnu packages xml)
  #:use-module (gnu packages)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module (guix utils)
  #:use-module (guix build-system glib-or-gtk)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system meson)
  #:use-module (guix build-system trivial))

(define-public ldns
  (package
    (name "ldns")
    (version "1.7.1")
    (source
     (origin
       (method url-fetch)
       (uri
        (string-append "https://www.nlnetlabs.nl/downloads/"
                       name "/" name "-" version ".tar.gz"))
       (sha256
        (base32 "0ac242n7996fswq1a3nlh1bbbhrsdwsq4mx7xq8ffq6aplb4rj4a"))
       (patches
        (search-patches
         ;; To create make-flag vairables,
         ;; for splitting installation of drill and examples.
         "ldns-drill-examples.patch"))))
    (build-system gnu-build-system)
    (outputs '("out" "drill" "examples" "pyldns"))
    (arguments
     `( ;; Tests require Tpkg.
       ;; https://tpkg.github.io/
       #:tests? #f
       #:configure-flags
       (list
        "--disable-static"
        "--enable-gost-anyway"
        "--enable-rrtype-ninfo"
        "--enable-rrtype-rkey"
        "--enable-rrtype-ta"
        "--enable-rrtype-avc"
        "--enable-rrtype-doa"
        "--enable-rrtype-amtrelay"
        "--with-drill"
        "--with-examples"
        "--with-pyldns"
        ;; Perl module DNS::LDNS not available.
        ;; https://github.com/erikoest/DNS-LDNS.git
        ;; "--with-p5-dns-ldns"
        (string-append "--with-ssl="
                       (assoc-ref %build-inputs "openssl"))
        (string-append "--with-ca-path="
                       (assoc-ref %build-inputs "nss-certs")
                       "/etc/ssl/certs"))
       #:make-flags
       (list
        (string-append "drillbindir="
                       (assoc-ref %outputs "drill")
                       "/bin")
        (string-append "drillmandir="
                       (assoc-ref %outputs "drill")
                       "/share/man")
        (string-append "examplesbindir="
                       (assoc-ref %outputs "examples")
                       "/bin")
        (string-append "examplesmandir="
                       (assoc-ref %outputs "examples")
                       "/share/man")
        (string-append "python_site="
                       (assoc-ref %outputs "pyldns")
                       "/lib/python"
                       ,(version-major+minor
                         (package-version python))
                       "/site-packages"))))
    (native-inputs
     `(("doxygen" ,doxygen)
       ("ksh" ,oksh)
       ("perl" ,perl)
       ("perl-devel-checklib" ,perl-devel-checklib)
       ("pkg-config" ,pkg-config)
       ("python" ,python-wrapper)
       ("swig" ,swig)))
    (inputs
     `(("libpcap" ,libpcap)
       ("nss-certs" ,nss-certs)
       ("openssl" ,openssl)))
    (synopsis "DNS library that facilitates DNS tool programming")
    (description "LDNS aims to simplify DNS programming, it supports recent
RFCs like the DNSSEC documents, and allows developers to easily create
software conforming to current RFCs, and experimental software for current
Internet Drafts.  A secondary benefit of using ldns is speed; ldns is written in
C it should be a lot faster than Perl.")
    (home-page "https://nlnetlabs.nl/projects/ldns/about/")
    (license license:bsd-3)))

(define-public dnssec-trigger
  (package
    (name "dnssec-trigger")
    (version "0.17")
    (source
     (origin
       (method url-fetch)
       (uri
        (string-append "https://www.nlnetlabs.nl/downloads/"
                       name "/" name "-" version ".tar.gz"))
       (sha256
        (base32 "10928q406x9r66a090xl5kznzgyxpja88w4srwcv454hd351j9f0"))))
    (build-system glib-or-gtk-build-system)
    (outputs '("out" "gui" "nm"))
    (arguments
     `(#:test-target "test"
       #:configure-flags
       (list
        (string-append "--with-ssl="
                       (assoc-ref %build-inputs "openssl"))
        "--with-hooks=networkmanager"
        (string-append "--with-networkmanager-dispatch="
                       (assoc-ref %outputs "nm")
                       "/etc/NetworkManager/dispatcher.d")
        (string-append "--with-xdg-autostart="
                       (assoc-ref %outputs "gui")
                       "/etc/xdg/autostart")
        (string-append "--with-uidir="
                       (assoc-ref %outputs "gui")
                       "/share/dnssec-trigger")
        (string-append "--with-python="
                       (assoc-ref %build-inputs "python")
                       "/bin/python")
        (string-append "--with-unbound-control="
                       (assoc-ref %build-inputs "unbound")
                       "/sbin/unbound-control")
        "--with-forward-zones-support")
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'patch-configure
           (lambda _
             (substitute* "configure"
               (("appindicator-0.1")
                "appindicator3-0.1"))
             #t))
         (add-before 'configure 'patch-makefile
           (lambda _
             (substitute* "Makefile.in"
               (("/usr")
                "$(prefix)")
               (("/etc")
                "$(prefix)/etc")
               ((".*gtk-update-icon-cache.*")
                ""))
             #t))
         (add-after 'install 'remove-systemd
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out")))
               (delete-file-recursively
                (string-append out "/lib/systemd"))
               #t)))
         (add-after 'remove-systemd 'move-gui
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (gui (assoc-ref outputs "gui")))
               (mkdir-p (string-append gui "/bin"))
               (mkdir-p (string-append gui "/share"))
               (rename-file
                (string-append out "/bin")
                (string-append gui "/bin"))
               (rename-file
                (string-append out "/share/icons")
                (string-append gui "/share/icons"))
               #t)))
         (add-after 'move-gui 'move-nm
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (nm (assoc-ref outputs "nm")))
               (mkdir-p (string-append nm "/libexec"))
               (rename-file
                (string-append out "/libexec")
                (string-append nm "/libexec"))
               #t))))))
    (native-inputs
     `(("cmocka" ,cmocka)
       ("pkg-config" ,pkg-config)
       ("python" ,python-wrapper)))
    (inputs
     `(("gtk+-2" ,gtk+-2)
       ("ldns" ,ldns)
       ("libappindicator" ,libappindicator)
       ("openssl" ,openssl)
       ("unbound" ,unbound)))
    (synopsis "DNSSEC protection for the DNS traffic")
    (description "DNSSEC-Trigger enables your computer to use DNSSEC protection
for the DNS traffic.  It relies on the Unbound DNS resolver running locally on
your system, which performs DNSSEC validation.  It reconfigures Unbound in such
a way that it will signal it to to use the DHCP obtained forwarders if possible,
fallback to doing its own AUTH queries if that fails, and if that fails it will
prompt the user with the option to go with insecure DNS only.")
    (home-page "https://www.nlnetlabs.nl/projects/dnssec-trigger/about/")
    (license license:bsd-3)))

(define-public dnsmasq
  (package
    (name "dnsmasq")
    (version "2.82")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://www.thekelleys.org.uk/dnsmasq/dnsmasq-"
                    version ".tar.xz"))
              (sha256
               (base32
                "0cn1xd1s6xs78jmrmwjnh9m6w3q38pk6dyqy2phvasqiyd33cll4"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (inputs
     `(("dbus" ,dbus)))
    (arguments
     `(#:phases
       (modify-phases %standard-phases (delete 'configure))
       #:make-flags (list (string-append "PREFIX=" (assoc-ref %outputs "out"))
                          "CC=gcc"
                          "COPTS=\"-DHAVE_DBUS\"")
       #:tests? #f))                    ; no ‘check’ target
    (home-page "http://www.thekelleys.org.uk/dnsmasq/doc.html")
    (synopsis "Small caching DNS proxy and DHCP/TFTP server")
    (description
     "Dnsmasq is a light-weight DNS forwarder and DHCP server.  It is designed
to provide DNS and, optionally, DHCP to a small network.  It can serve the
names of local machines which are not in the global DNS.  The DHCP server
integrates with the DNS server and allows machines with DHCP-allocated
addresses to appear in the DNS with names configured either on each host or in
a central configuration file.  Dnsmasq supports static and dynamic DHCP leases
and BOOTP/TFTP for network booting of diskless machines.")
    ;; Source files only say GPL2 and GPL3 are allowed.
    (license (list license:gpl2 license:gpl3))))

;; 'bind' is the name of a built-in Guile procedure, which is why we choose a
;; different name here.
(define-public isc-bind
  (package
    (name "bind")
    (version "9.16.6")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://ftp.isc.org/isc/bind9/" version
                    "/bind-" version ".tar.xz"))
              (sha256
               (base32
                "1jvi6ms51vyrhpflx05xlb7gblyd59zsyj28b8s3pl3xnkrv0rxm"))))
    (build-system gnu-build-system)
    (outputs `("out" "utils"))
    (inputs
     ;; It would be nice to add GeoIP and gssapi once there are packages.
     `(("libcap" ,libcap)
       ("libuv" ,libuv)
       ("libxml2" ,libxml2)
       ("openssl" ,openssl)
       ("p11-kit" ,p11-kit)
       ("python" ,python)
       ("python-ply" ,python-ply)))
    (native-inputs
     `(("perl" ,perl)
       ("pkg-config" ,pkg-config)))
    (arguments
     `(#:configure-flags
       (list (string-append "--with-pkcs11="
                            (assoc-ref %build-inputs "p11-kit")))
       #:phases
       (modify-phases %standard-phases
         (add-after 'strip 'move-to-utils
           (lambda _
             (for-each
              (lambda (file)
                (let ((target  (string-append (assoc-ref %outputs "utils") file))
                      (src  (string-append (assoc-ref %outputs "out") file)))
                  (mkdir-p (dirname target))
                  (link src target)
                  (delete-file src)))
              '("/bin/dig" "/bin/delv" "/bin/nslookup" "/bin/host" "/bin/nsupdate"
                "/share/man/man1/dig.1"
                "/share/man/man1/host.1"
                "/share/man/man1/nslookup.1"
                "/share/man/man1/nsupdate.1"))
             #t))
         ;; When and if guix provides user namespaces for the build process,
         ;; then the following can be uncommented and the subsequent "force-test"
         ;; will not be necessary.
         ;;
         ;;   (add-before 'check 'set-up-loopback
         ;;     (lambda _
         ;;          (system "bin/tests/system/ifconfig.sh up")))
         (replace 'check
           (lambda _
             ;; XXX Even ‘make force-test’ tries to create network interfaces
             ;; and fails.  The only working target is the (trivial) fuzz test.
             (with-directory-excursion "fuzz"
               (invoke "make" "check"))
             #t)))))
    (synopsis "Domain Name System (DNS) implementation")
    (description "BIND is an implementation of the @dfn{Domain Name System}
(DNS) protocols for the Internet.  It is a reference implementation of those
protocols, but it is also production-grade software, suitable for use in
high-volume and high-reliability applications.  The name BIND stands for
\"Berkeley Internet Name Domain\", because the software originated in the
early 1980s at the University of California at Berkeley.  The @code{utils}
output of this package contains the following DNS name servers related command
line utilities:
@table @code
@item delv
DNS lookup and validation utility
@item dig
DNS lookup utility
@item host
DNS lookup utility
@item nslookup
Internet name servers interactive query utility
@item nsupdate
Dynamic DNS update utility
@end table")
    (home-page "https://www.isc.org/bind/")
    (license (list license:mpl2.0))))

(define-public dnscrypt-proxy
  (package
    (name "dnscrypt-proxy")
    (version "1.9.5")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://download.dnscrypt.org/dnscrypt-proxy/"
                    "dnscrypt-proxy-" version ".tar.bz2"))
              (sha256
               (base32
                "1dhvklr4dg2vlw108n11xbamacaryyg3dbrg629b76lp7685p7z8"))
              (modules '((guix build utils)))
              (snippet
               ;; Delete bundled libltdl. XXX: This package also bundles
               ;; a modified libevent that cannot currently be removed.
               '(begin
                  (delete-file-recursively "libltdl")
                  #t))))
    (build-system gnu-build-system)
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'autoreconf
           (lambda _
             ;; Re-generate build files due to unbundling ltdl.
             ;; TODO: Prevent generating new libltdl and building it.
             ;; The system version is still favored and referenced.
             (invoke "autoreconf" "-vif"))))))
    (native-inputs
     `(("pkg-config" ,pkg-config)
       ("automake" ,automake)
       ("autoconf" ,autoconf)
       ("libtool" ,libtool)))
    (inputs
     `(("libltdl" ,libltdl)
       ("libsodium" ,libsodium)))
    (home-page "https://www.dnscrypt.org/")
    (synopsis "Securely send DNS requests to a remote server")
    (description
     "@command{dnscrypt-proxy} is a tool for securing communications
between a client and a DNS resolver.  It verifies that responses you get
from a DNS provider was actually sent by that provider, and haven't been
tampered with.  For optimal performance it is recommended to use this as
a forwarder for a caching DNS resolver such as @command{dnsmasq}, but it
can also be used as a normal DNS \"server\".  A list of public dnscrypt
servers is included, and an up-to-date version is available at
@url{https://download.dnscrypt.org/dnscrypt-proxy/dnscrypt-resolvers.csv}.")
    (license (list license:isc
                   ;; Libevent and src/ext/queue.h is 3-clause BSD.
                   license:bsd-3))))

(define-public dnscrypt-wrapper
  (package
    (name "dnscrypt-wrapper")
    (version "0.2.2")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://github.com/cofyc/dnscrypt-wrapper/releases"
                    "/download/v" version "/" name "-v" version ".tar.bz2"))
              (sha256
               (base32
                "1vhg4g0r687f51wcdn7z9w1hxapazx6vyh5rsr8wa48sljzd583g"))))
    (build-system gnu-build-system)
    (arguments
     `(#:make-flags '("CC=gcc")
       ;; TODO: Tests require ruby-cucumber and ruby-aruba.
       #:tests? #f
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'create-configure
           (lambda _
             (invoke "make" "configure"))))))
    (native-inputs
     `(("autoconf" ,autoconf)))
    (inputs
     `(("libevent" ,libevent)
       ("libsodium" ,libsodium)))
    (home-page "https://github.com/Cofyc/dnscrypt-wrapper")
    (synopsis "Server-side dnscrypt proxy")
    (description
     "@command{dnscrypt-wrapper} is a tool to expose a name server over
the @code{dnscrypt} protocol.  It can be used as an endpoint for the
@command{dnscrypt-proxy} client to securely tunnel DNS requests between
the two.")
    (license (list license:isc
                   ;; Bundled argparse is MIT. TODO: package and unbundle.
                   license:expat
                   ;; dns-protocol.h and rfc1035.{c,h} is gpl2 or gpl3 (either).
                   license:gpl2
                   license:gpl3))))

(define-public libasr
  (package
    (name "libasr")
    (version "1.0.4")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "https://www.opensmtpd.org/archives/"
                           "libasr-" version ".tar.gz"))
       (sha256
        (base32 "1d6s8njqhvayx2gp47409sp1fn8m608ws26hr1srfp6i23nnpyqr"))))
    (build-system gnu-build-system)
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'install 'install-documentation
           (lambda* (#:key outputs #:allow-other-keys)
             (let ((out (assoc-ref outputs "out")))
               (install-file "src/asr_run.3"
                             (string-append out "/share/man/man3"))
               #t))))))
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)
       ("libtool" ,libtool)
       ("pkg-config" ,pkg-config)))
    (home-page "https://www.opensmtpd.org")
    (synopsis "Asynchronous resolver library by the OpenBSD project")
    (description
     "libasr is a free, simple and portable asynchronous resolver library.
It runs DNS queries and performs hostname resolution in a fully
asynchronous fashion.")
    (license (list license:isc
                   license:bsd-2 ; last part of getrrsetbyname_async.c
                   license:bsd-3
                   (license:non-copyleft "file://LICENSE") ; includes.h
                   license:openssl))))

(define-public nsd
  (package
    (name "nsd")
    (version "4.3.2")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "https://www.nlnetlabs.nl/downloads/nsd/nsd-"
                           version ".tar.gz"))
       (sha256
        (base32 "0ac3mbn5z4nc18782m9aswdpi2m9f4665vidw0ciyigdh0pywp2v"))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags
       (list "--enable-pie"             ; fully benefit from ASLR
             "--enable-ratelimit"
             "--enable-recvmmsg"
             "--enable-relro-now"       ; protect GOT and .dtor areas
             "--disable-radix-tree"
             (string-append "--with-libevent="
                            (assoc-ref %build-inputs "libevent"))
             (string-append "--with-ssl="
                            (assoc-ref %build-inputs "openssl"))
             "--with-configdir=/etc"
             "--with-nsd_conf_file=/etc/nsd/nsd.conf"
             "--with-logfile=/var/log/nsd.log"
             "--with-pidfile=/var/db/nsd/nsd.pid"
             "--with-dbfile=/var/db/nsd/nsd.db"
             "--with-zonesdir=/etc/nsd"
             "--with-xfrdfile=/var/db/nsd/xfrd.state"
             "--with-zonelistfile=/var/db/nsd/zone.list")
       #:phases
       (modify-phases %standard-phases
         (add-before 'configure 'patch-installation-paths
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (doc (string-append out "/share/doc/" ,name "-" ,version)))
               ;; The ‘make install’ target tries to create the parent
               ;; directories of run-time things like ‘pidfile’ above, and
               ;; useless empty directories like 'configdir'.  Remove such
               ;; '$(INSTALL)' lines and install the example configuration file
               ;; in an appropriate location.
               (substitute* "Makefile.in"
                 ((".*INSTALL.*\\$\\((config|pid|xfr|db)dir" command)
                  (string-append "#" command))
                 (("\\$\\(nsdconfigfile\\)\\.sample" file-name)
                  (string-append doc "/examples/" file-name)))
               #t))))
       #:tests? #f))                    ; no tests
    (inputs
     `(("libevent" ,libevent)
       ("openssl" ,openssl)))
    (home-page "https://www.nlnetlabs.nl/projects/nsd/about/")
    (synopsis "Authoritative DNS name server")
    (description "@dfn{NSD}, short for Name Server Daemon, is an authoritative
name server for the Domain Name System (@dfn{DNS}).  It aims to be a fast and
RFC-compliant nameserver.

NSD uses zone information compiled via @command{zonec} into a binary database
file (@file{nsd.db}).  This allows fast startup of the name service daemon and
allows syntax-structural errors in zone files to be flagged at compile time,
before being made available to NSD service itself.  However, most traditional
BIND-style zone files can be directly imported into NSD without modification.

The collection of programs and processes that make up NSD are designed so that
the daemon itself runs as a non-privileged user and can be easily configured to
run in a @code{chroot} jail, thus making any security flaws in NSD less likely
to result in system-wide compromise.")
    (license (list license:bsd-3))))

(define-public unbound
  (package
    (name "unbound")
    (version "1.10.1")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "https://www.unbound.net/downloads/unbound-"
                           version ".tar.gz"))
       (sha256
        (base32 "0dnmh9jjh2v274f0hl31bgv40pl77mmfgky8bkqr5kvi3b17fdmp"))))
    (build-system gnu-build-system)
    (outputs '("out" "python"))
    (native-inputs
     `(("flex" ,flex)
       ("swig" ,swig)))
    (inputs
     `(("expat" ,expat)
       ("libevent" ,libevent)
       ("protobuf" ,protobuf)
       ("python-wrapper" ,python-wrapper)
       ("openssl" ,openssl)))
    (arguments
     `(#:configure-flags
       (list "--disable-static" ; save space and non-determinism in libunbound.a
             (string-append
              "--with-ssl=" (assoc-ref %build-inputs "openssl"))
             (string-append
              "--with-libevent=" (assoc-ref %build-inputs "libevent"))
             (string-append
              "--with-libexpat=" (assoc-ref %build-inputs "expat"))
             "--with-pythonmodule" "--with-pyunbound")
       #:phases
       (modify-phases %standard-phases
         (add-after 'configure 'fix-python-site-package-path
           ;; Move python modules into their own output.
           (lambda* (#:key outputs #:allow-other-keys)
             (let ((pyout (assoc-ref outputs "python"))
                   (ver ,(version-major+minor (package-version python))))
               (substitute* "Makefile"
                 (("^PYTHON_SITE_PKG=.*$")
                  (string-append
                   "PYTHON_SITE_PKG="
                   pyout "/lib/python-" ver "/site-packages\n"))))
             #t))
         (add-before 'check 'fix-missing-nss-for-tests
           ;; Unfortunately, the package's unittests involve some checks
           ;; looking up protocols and services which are not provided
           ;; by the minimalistic build environment, in particular,
           ;; /etc/protocols and /etc/services are missing.
           ;; Also, after plain substitution of protocol and service names
           ;; in the test data, the tests still fail because the
           ;; corresponding Resource Records have been signed by
           ;; RRSIG records.
           ;; The following LD_PRELOAD library overwrites the glibc
           ;; functions ‘get{proto,serv}byname’, ‘getprotobynumber’ and
           ;; ‘getservbyport’ providing the few records required for the
           ;; unit tests to pass.
           (lambda* (#:key inputs outputs #:allow-other-keys)
             (let* ((source (assoc-ref %build-inputs "source"))
                    (gcc (assoc-ref %build-inputs "gcc")))
               (call-with-output-file "/tmp/nss_preload.c"
                 (lambda (port)
                   (display "#include <stdlib.h>
#include <string.h>
#include <strings.h>

#include <netdb.h>

struct protoent *getprotobyname(const char *name) {
  struct protoent *p = malloc(sizeof(struct protoent));
  p->p_aliases = malloc(sizeof(char*));
  if (strcasecmp(name, \"tcp\") == 0) {
    p->p_name = \"tcp\";
    p->p_proto = 6;
    p->p_aliases[0] = \"TCP\";
  } else if (strcasecmp(name, \"udp\") == 0) {
    p->p_name = \"udp\";
    p->p_proto = 17;
    p->p_aliases[0] = \"UDP\";
  } else 
    p = NULL;
  return p;
}

struct protoent *getprotobynumber(int proto) {
  struct protoent *p = malloc(sizeof(struct protoent));
  p->p_aliases = malloc(sizeof(char*));
  switch(proto) {
  case 6:
    p->p_name = \"tcp\";
    p->p_proto = 6;
    p->p_aliases[0] = \"TCP\";
    break;
  case 17:
    p->p_name = \"udp\";
    p->p_proto = 17;
    p->p_aliases[0] = \"UDP\";
    break;
  default:
    p = NULL;
    break;
  }
  return p;
}

struct servent *getservbyname(const char *name, const char *proto) {
  struct servent *s = malloc(sizeof(struct servent));
  char* buf = malloc((strlen(proto)+1)*sizeof(char));
  strcpy(buf, proto);
  s->s_aliases = malloc(sizeof(char*));
  s->s_aliases[0] = NULL;
  if (strcasecmp(name, \"domain\") == 0) {
    s->s_name = \"domain\";
    s->s_port = htons(53);
    s->s_proto = buf;
  } else 
    s = NULL;
  return s;
}

struct servent *getservbyport(int port, const char *proto) {
  char buf[32];
  struct servent *s = malloc(sizeof(struct servent));
  strcpy(buf, proto);
  s->s_aliases = malloc(sizeof(char*));
  s->s_aliases[0] = NULL;
  switch(port) {
  case 53:
    s->s_name = \"domain\";
    s->s_port = 53;
    s->s_proto = \"udp\";
    break;
  default:
    s = NULL;
    break;
  }
  return s;
}" port)))
               (invoke (string-append gcc "/bin/gcc")
                       "-shared" "-fPIC" "-o" "/tmp/nss_preload.so"
                       "/tmp/nss_preload.c")
               ;; The preload library only affects the unittests.
               (substitute* "Makefile"
                 (("./unittest")
                  "LD_PRELOAD=/tmp/nss_preload.so ./unittest")))
             #t)))))
    (home-page "https://www.unbound.net")
    (synopsis "Validating, recursive, and caching DNS resolver")
    (description
     "Unbound is a recursive-only caching DNS server which can perform DNSSEC
validation of results.  It implements only a minimal amount of authoritative
service to prevent leakage to the root nameservers: forward lookups for
localhost, reverse for @code{127.0.0.1} and @code{::1}, and NXDOMAIN for zones
served by AS112.  Stub and forward zones are supported.")
    (license license:bsd-4)))

(define-public yadifa
  (package
    (name "yadifa")
    (version "2.3.9")
    (source
     (let ((build "8497"))
       (origin
         (method url-fetch)
         (uri
          (string-append "http://cdn.yadifa.eu/sites/default/files/releases/"
                         "yadifa-" version "-" build ".tar.gz"))
         (sha256
          (base32 "0xvyr91sfgzkpw6g3h893ldbwnki3w2472n56rr18w67qghs1sa5")))))
    (build-system gnu-build-system)
    (native-inputs
     `(("which" ,which)))
    (inputs
     `(("openssl" ,openssl)))
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-before 'configure 'omit-example-configurations
           (lambda _
             (substitute* "Makefile.in"
               ((" (etc|var)") ""))
             #t)))
       #:configure-flags
       (list "--sysconfdir=/etc"
             "--localstatedir=/var"
             "--disable-build-timestamp" ; build reproducibly
             "--enable-shared"
             "--disable-static"
             "--enable-acl"
             "--enable-caching"
             "--enable-ctrl"            ; enable remote control
             "--enable-nsec"
             "--enable-nsec3"
             "--enable-tsig")))
    (home-page "https://www.yadifa.eu/")
    (synopsis "Authoritative DNS name server")
    (description "YADIFA is an authoritative name server for the @dfn{Domain
Name System} (DNS).  It aims for both higher performance and a smaller memory
footprint than other implementations, while remaining fully RFC-compliant.
YADIFA supports dynamic record updates and the @dfn{Domain Name System Security
Extensions} (DNSSEC).")
    (license license:bsd-3)))

(define-public knot
  (package
    (name "knot")
    (version "2.9.5")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "https://secure.nic.cz/files/knot-dns/"
                           "knot-" version ".tar.xz"))
       (sha256
        (base32 "0xmzmhd2m9rb24clrrd9k058harsq67nyjplpbyxvy1g46xah28i"))
       (modules '((guix build utils)))
       (snippet
        '(begin
           ;; Delete bundled libraries.
           (with-directory-excursion "src/contrib"
             (delete-file-recursively "lmdb"))
           #t))))
    (build-system gnu-build-system)
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (inputs
     `(("fstrm" ,fstrm)
       ("gnutls" ,gnutls)
       ("jansson" ,jansson)
       ("libcap-ng" ,libcap-ng)
       ("libedit" ,libedit)
       ("libidn" ,libidn)
       ("liburcu" ,liburcu)
       ("lmdb" ,lmdb)
       ("ncurses" ,ncurses)
       ("protobuf-c" ,protobuf-c)))
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-before 'configure 'disable-directory-pre-creation
           (lambda _
             ;; Don't install empty directories like ‘/etc’ outside the store.
             ;; This is needed even when using ‘make config_dir=... install’.
             (substitute* "src/Makefile.in" (("\\$\\(INSTALL\\) -d") "true"))
             #t))
         (replace 'install
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (doc (string-append out "/share/doc/" ,name "-" ,version))
                    (etc (string-append doc "/examples/etc")))
               (invoke "make"
                       (string-append "config_dir=" etc)
                       "install")))))
       #:configure-flags
       (list "--sysconfdir=/etc"
             "--localstatedir=/var"
             "--enable-dnstap"          ; let tools read/write capture files
             "--with-module-dnstap=yes" ; detailed query capturing & logging
             (string-append "--with-bash-completions="
                            (assoc-ref %outputs "out")
                            "/etc/bash_completion.d"))))
    (home-page "https://www.knot-dns.cz/")
    (synopsis "Authoritative DNS name server")
    (description "Knot DNS is an authoritative name server for the @dfn{Domain
Name System} (DNS), designed to meet the needs of root and @dfn{top-level
domain} (TLD) name servers.  It is implemented as a threaded daemon and uses a
number of programming techniques to improve speed.  For example, the responder
is completely lock-free, resulting in a very high response rate.  Other features
include automatic @dfn{DNS Security Extensions} (DNSSEC) signing, dynamic record
synthesis, and on-the-fly re-configuration.")
    (license
     (list
      ;; src/contrib/{hat-trie,murmurhash3,openbsd},
      ;; src/dnssec/contrib/vpool.[ch], and parts of libtap/ are ‘MIT’ (expat).
      license:expat
      license:lgpl2.0+              ; parts of scr/contrib/ucw
      license:public-domain         ; src/contrib/fnv and possibly murmurhash3
      license:gpl3+))))             ; everything else

(define-public knot-resolver
  (package
    (name "knot-resolver")
    (version "4.3.0")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://secure.nic.cz/files/knot-resolver/"
                                  "knot-resolver-" version ".tar.xz"))
              (sha256
               (base32
                "09ffmqx79lv5psr433x4n946njgsn071b9b7161pcb9bmrqz380c"))))
    (build-system meson-build-system)
    (arguments
     '(#:configure-flags '("-Ddoc=enabled")
       #:phases
       (modify-phases %standard-phases
         (add-before 'configure 'disable-default-ta
           (lambda _
             ;;  Disable the default managed root TA, since we don't have
             ;;  write access to the keyfile and its directory in store.
             (substitute* "daemon/lua/sandbox.lua.in"
               (("^trust_anchors\\.add_file.*") ""))
             #t))
         (add-after 'build 'build-doc
           (lambda _
             (invoke "ninja" "doc")))
         (add-after 'install 'wrap-binary
           (lambda* (#:key inputs outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (lua-* (map cdr (filter
                                     (lambda (input)
                                       (string-prefix? "lua-" (car input)))
                                     inputs)))
                    (lua-path (lambda (p)
                                (string-append p "/share/lua/5.1/?.lua")))
                    (lua-cpath (lambda (p)
                                 (string-append p "/lib/lua/5.1/?.so"))))
               (wrap-program (string-append out "/sbin/kresd")
                 `("LUA_PATH" ";" prefix ,(map lua-path lua-*))
                 `("LUA_CPATH" ";" prefix ,(map lua-cpath lua-*)))
               #t))))))
    (native-inputs
     `(("cmocka" ,cmocka)               ; for unit tests
       ("doxygen" ,doxygen)
       ("protobuf-c" ,protobuf-c)
       ("pkg-config" ,pkg-config)
       ("python-breathe" ,python-breathe)
       ("python-sphinx" ,python-sphinx)
       ("python-sphinx-rtd-theme" ,python-sphinx-rtd-theme)))
    (inputs
     `(("fstrm" ,fstrm)
       ("gnutls" ,gnutls)
       ("knot" ,knot)
       ("libuv" ,libuv)
       ("lmdb" ,lmdb)
       ("luajit" ,luajit)
       ;; TODO: Add optional lua modules: basexx and psl.
       ("lua-bitop" ,lua5.1-bitop)
       ("lua-cqueues" ,lua5.1-cqueues)
       ("lua-filesystem" ,lua5.1-filesystem)
       ("lua-sec" ,lua5.1-sec)
       ("lua-socket" ,lua5.1-socket)))
    (home-page "https://www.knot-resolver.cz/")
    (synopsis "Caching validating DNS resolver")
    (description
     "Knot Resolver is a caching full resolver implementation written in C and
LuaJIT, both a resolver library and a daemon.")
    (license (list license:gpl3+
                   ;; Some 'contrib' files are under MIT, CC0 and LGPL2.
                   license:expat
                   license:cc0
                   license:lgpl2.0))))

(define-public ddclient
  (package
    (name "ddclient")
    (version "3.9.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/ddclient/ddclient")
             (commit (string-append "v" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32 "0hf377g4j9r9sac75xp17nk2h58mazswz4vkg4g2gl2yyhvzq91w"))))
    (build-system trivial-build-system) ; no Makefile.PL
    (native-inputs
     `(("bash" ,bash)
       ("perl" ,perl)))
    (inputs
     `(("inetutils" ,inetutils)         ; logger
       ("net-tools" ,net-tools)
       ("perl-data-validate-ip" ,perl-data-validate-ip)
       ("perl-digest-sha1" ,perl-digest-sha1)
       ("perl-io-socket-ssl" ,perl-io-socket-ssl)))
    (arguments
     `(#:modules ((guix build utils)
                  (ice-9 match)
                  (srfi srfi-26))
       #:builder
       (begin
         (use-modules (guix build utils)
                      (ice-9 match)
                      (srfi srfi-26))
         (setenv "PATH" (string-append
                         (assoc-ref %build-inputs "bash") "/bin" ":"
                         (assoc-ref %build-inputs "perl") "/bin"))

         ;; Copy the (read-only) source into the (writable) build directory.
         (copy-recursively (assoc-ref %build-inputs "source") ".")

         ;; Install.
         (let* ((out (assoc-ref %outputs "out"))
                (bin (string-append out "/bin")))
           (let ((file "ddclient"))
             (substitute* file
               (("/usr/bin/perl") (which "perl"))
               ;; Strictly use ‘/etc/ddclient/ddclient.conf’.
               (("\\$\\{program\\}\\.conf") "/etc/ddclient/ddclient.conf")
               (("\\$etc\\$program.conf") "/etc/ddclient/ddclient.conf")
               ;; Strictly use ‘/var/cache/ddclient/ddclient.cache’
               (("\\$cachedir\\$program\\.cache")
                "/var/cache/ddclient/ddclient.cache"))
             (install-file file bin)
             (wrap-program (string-append bin "/" file)
               `("PATH" ":" =
                 ("$PATH"
                  ,@(map (lambda (input)
                           (match input
                                  ((name . store)
                                   (string-append store "/bin"))))
                         %build-inputs)))
               `("PERL5LIB" ":" =
                 ,(delete
                   ""
                   (map (match-lambda
                         (((? (cut string-prefix? "perl-" <>) name) . dir)
                          (string-append dir "/lib/perl5/site_perl"))
                         (_ ""))
                        %build-inputs)))))
           (for-each (cut install-file <> (string-append out
                                                         "/share/ddclient"))
                     (find-files "." "sample.*$"))))))
    (home-page "https://ddclient.net/")
    (synopsis "Address updating utility for dynamic DNS services")
    (description "This package provides a client to update dynamic IP
addresses with several dynamic DNS service providers, such as
@uref{https://www.dyndns.com/account/login.html,DynDNS.com}.

This makes it possible to use a fixed hostname (such as myhost.dyndns.org) to
access a machine with a dynamic IP address.

The client supports both dynamic and (near) static services, as well as MX
record and alternative name management.  It caches the address, and only
attempts the update when it has changed.")
    (license license:gpl2+)))

(define-public hnsd
  ;; There have been no releases yet, hence this commit.
  (let ((revision "0")
        (commit "895d89c25d316d18df9d374fe78aae3902bc89fb"))
   (package
     (name "hnsd")
     (version (git-version "0.0" revision commit))
     (source (origin
               (method git-fetch)
               (uri (git-reference
                     (url "https://github.com/handshake-org/hnsd")
                     (commit commit)))
               (sha256
                (base32
                 "0704y73sddn24jga9csw4gxyfb3pnrfnk0vdcph84n1h38490l16"))
               (file-name (git-file-name name version))
               (modules '((guix build utils)))
               (snippet
                '(begin
                   ;; Delete the bundled copy of libuv.
                   (delete-file-recursively "uv")
                   (substitute* "configure.ac"
                     (("AC_CONFIG_SUBDIRS\\(\\[uv\\]\\)") ""))
                   (substitute* "Makefile.am"
                     (("SUBDIRS = uv") "\n")
                     (("\\$\\(top_builddir\\)/uv/libuv.la") "-luv")

                     ;; Make sure the 'hnsd' binary is installed and
                     ;; dynamically-linked.
                     (("noinst_PROGRAMS") "bin_PROGRAMS")
                     (("hnsd_LDFLAGS = -static") ""))

                   ;; This script tries to chdir to "uv" and doesn't do more
                   ;; than "autoreconf" so remove it.
                   (delete-file "autogen.sh")
                   #t))))
     (build-system gnu-build-system)
     (arguments
      '(#:configure-flags '("--disable-static"))) ;no need for libhsk.a
     (native-inputs
      `(("autoconf" ,autoconf)
        ("automake" ,automake)
        ("libtool" ,libtool)))
     (inputs
      `(("unbound" ,unbound)
        ("libuv" ,libuv)))
     (home-page "https://www.handshake.org/")
     (synopsis "Resolver daemon for the Handshake naming protocol")
     (description
      "@command{hnsd} is a @dfn{host name resolver} for the Handshake Naming
System (HNS) peer-to-peer network.")
     (license license:expat))))

(define-public libmicrodns
  (package
    (name "libmicrodns")
    (version "0.1.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://github.com/videolabs/libmicrodns/"
                                  "releases/download/" version "/microdns-"
                                  version ".tar.xz"))
              (sha256
               (base32
                "0p4va18zxgmzcdwhlbg2mmjwswlbgqy4ay5vaxrw7cxmhsflnv36"))))
    (build-system meson-build-system)
    (home-page "https://github.com/videolabs/libmicrodns")
    (synopsis "Minimal mDNS resolver library")
    (description "@code{libmicrodns} provides a minimal implementation of a
mDNS resolver as well as an announcer.  mDNS (Multicast Domain Name System) is
a zero-config service that allows one to resolve host names to IP addresses in
local networks.")
    (license license:lgpl2.1)))

(define-public public-suffix-list
  ;; Mozilla releases the official list here:
  ;;
  ;;   https://publicsuffix.org/list/public_suffix_list.dat
  ;;
  ;; However, Mozilla syncs that file from the GitHub repository periodically,
  ;; so its contents will change over time.  If you update this commit, please
  ;; make sure that the new commit refers to a list which is identical to the
  ;; officially published list available from the URL above.
  (let ((commit "9375b697baddb0827a5995c81bd3c75877a0b35d"))
    (package
      (name "public-suffix-list")
      (version (git-version "0" "1" commit))
      (source (origin
                (method git-fetch)
                (uri (git-reference
                      (url "https://github.com/publicsuffix/list")
                      (commit commit)))
                (file-name (git-file-name name version))
                (sha256
                 (base32
                  "1sm7pni01rnl4ldzi8z8nc4cbgq8nxda9gwc68v0s3ij7jd1jmik"))))
      (build-system trivial-build-system)
      (arguments
       `(#:modules ((guix build utils))
         #:builder
         (begin
           (use-modules (guix build utils))
           (let* ((out (assoc-ref %outputs "out"))
                  ;; Install to /share because that is where "read-only
                  ;; architecture-independent data files" should go (see:
                  ;; (standards) Directory Variables).  Include the version in
                  ;; the directory name so that if multiple versions are ever
                  ;; installed in the same profile, they will not conflict.
                  (destination (string-append
                                out "/share/public-suffix-list-" ,version))
                  (source (assoc-ref %build-inputs "source")))
             (with-directory-excursion source
             (install-file "public_suffix_list.dat" destination)
             (install-file "LICENSE" destination))
             #t))))
      (home-page "https://publicsuffix.org/")
      (synopsis "Database of current and historical DNS suffixes")
      (description "This is the Public Suffix List maintained by Mozilla.  A
\"public suffix\" is one under which Internet users can (or historically
could) directly register names in the Domain Name System (DNS).  Some examples
of public suffixes are .com, .co.uk and pvt.k12.ma.us.  This is a list of all
known public suffixes.")
      (license license:mpl2.0))))

(define-public maradns
  (package
    (name "maradns")
    (version "3.5.0007")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "https://maradns.samiam.org/download/"
                           (version-major+minor version) "/"
                           version "/maradns-" version ".tar.xz"))
       (sha256
        (base32 "0bc19xylg4whww9qaj5i4izwxcrh0c0ja7l1pfcn2la02hlvg1a6"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f                      ; need to be root to run tests
       #:make-flags
       (list
        ,(string-append "CC=" (cc-for-target))
        (string-append "PREFIX=" %output)
        (string-append "RPM_BUILD_ROOT=" %output))
       #:phases
       (modify-phases %standard-phases
         (replace 'configure
           (lambda* (#:key native-inputs target #:allow-other-keys)
             ;; make_32bit_tables generates a header file that is used during
             ;; compilation. Hence, during cross compilation, it should be
             ;; built for the host system.
             (when target
               (substitute* "rng/Makefile"
                 (("\\$\\(CC\\) -o make_32bit_tables")
                  (string-append (assoc-ref native-inputs "gcc")
                                 "/bin/gcc -o make_32bit_tables"))))
             (invoke "./configure")))
         (add-before 'install 'create-install-directories
           (lambda* (#:key outputs #:allow-other-keys)
             (let ((out (assoc-ref outputs "out")))
               (for-each (lambda (dir)
                           (mkdir-p (string-append out dir)))
                         (list "/bin" "/sbin" "/etc"
                               "/share/man/man1"
                               "/share/man/man5"
                               "/share/man/man8"))
               #t))))))
    (home-page "https://maradns.samiam.org")
    (synopsis "Small lightweight DNS server")
    (description "MaraDNS is a small and lightweight DNS server.  MaraDNS
consists of a UDP-only authoritative DNS server for hosting domains, and a UDP
and TCP-capable recursive DNS server for finding domains on the internet.")
    (license license:bsd-2)))

(define-public openresolv
  (package
    (name "openresolv")
    (version "3.10.0")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://roy.marples.name/downloads/openresolv/"
                                  "openresolv-" version ".tar.xz"))
              (sha256
               (base32
                "01ms6c087la4hk0f0w6n2vpsb7dg4kklah2rqyhz88p0vr9bqy20"))
              (patches
               (search-patches "openresolv-restartcmd-guix.patch"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f                      ; No test suite
       #:configure-flags
       (list (string-append "--sysconfdir=/etc"))
       #:make-flags
       (list (string-append "SYSCONFDIR=/" (assoc-ref %outputs "out") "/etc"))))
    (home-page "https://roy.marples.name/projects/openresolv/")
    (synopsis "Resolvconf POSIX compliant implementation, a middleman for resolv.conf")
    (description "openresolv is an implementation of @command{resolvconf}, the
middleman between the network configuration services and
@file{/etc/resolv.conf}.  @command{resolvconf} itself is just a script that
stores, removes and lists a full @file{resolv.conf} generated for the
interface.  It then calls all the helper scripts it knows about so it can
configure the real @file{/etc/resolv.conf} and optionally any local
nameservers other than libc.")
    (license license:bsd-2)))