services: Add murmur.

* gnu/services/telephony.scm: New file.
* gnu/local.mk: Add it.
* doc/guix.texi (Telephony Services): New node.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

2 files changed, 306 insertions, 0 deletions

diff --git a/gnu/local.mk b/gnu/local.mk
index 4d0ee75100..dbfe6829e6 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -461,6 +461,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/services/spice.scm				\
   %D%/services/ssh.scm				\
   %D%/services/sysctl.scm			\
+  %D%/services/telephony.scm			\
   %D%/services/version-control.scm              \
   %D%/services/vpn.scm				\
   %D%/services/web.scm				\
diff --git a/gnu/services/telephony.scm b/gnu/services/telephony.scm
new file mode 100644
index 0000000000..0a735315b4
--- /dev/null
+++ b/gnu/services/telephony.scm
@@ -0,0 +1,305 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2017 nee  <nee-git@hidamari.blue>
+;;;
+;;; 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 services telephony)
+  #:use-module (gnu services)
+  #:use-module (gnu services shepherd)
+  #:use-module (gnu system shadow)
+  #:use-module (gnu packages admin)
+  #:use-module (gnu packages telephony)
+  #:use-module (guix records)
+  #:use-module (guix gexp)
+  #:use-module (srfi srfi-1)
+  #:use-module (ice-9 match)
+  #:export (murmur-configuration
+            make-murmur-configuration
+            murmur-configuration?
+            murmur-configuration-package
+            murmur-configuration-user
+            murmur-configuration-group
+            murmur-configuration-port
+            murmur-configuration-welcome-text
+            murmur-configuration-server-password
+            murmur-configuration-max-users
+            murmur-configuration-max-user-bandwidth
+            murmur-configuration-database-file
+            murmur-configuration-log-file
+            murmur-configuration-pid-file
+            murmur-configuration-autoban-attempts
+            murmur-configuration-autoban-timeframe
+            murmur-configuration-autoban-time
+            murmur-configuration-opus-threshold
+            murmur-configuration-channel-nesting-limit
+            murmur-configuration-channelname-regex
+            murmur-configuration-username-regex
+            murmur-configuration-text-message-length
+            murmur-configuration-image-message-length
+            murmur-configuration-cert-required?
+            murmur-configuration-remember-channel?
+            murmur-configuration-allow-html?
+            murmur-configuration-allow-ping?
+            murmur-configuration-bonjour?
+            murmur-configuration-send-version?
+            murmur-configuration-log-days
+            murmur-configuration-obfuscate-ips?
+            murmur-configuration-ssl-cert
+            murmur-configuration-ssl-key
+            murmur-configuration-ssl-dh-params
+            murmur-configuration-ssl-ciphers
+            murmur-configuration-public-registration
+            murmur-configuration-file
+
+            murmur-public-registration-configuration
+            make-murmur-public-registration-configuration
+            murmur-public-registration-configuration?
+            murmur-public-registration-configuration-name
+            murmur-public-registration-configuration-url
+            murmur-public-registration-configuration-password
+            murmur-public-registration-configuration-hostname
+
+            murmur-service-type))
+
+;; https://github.com/mumble-voip/mumble/blob/master/scripts/murmur.ini
+
+(define-record-type* <murmur-configuration> murmur-configuration
+  make-murmur-configuration
+  murmur-configuration?
+  (package               murmur-configuration-package ;<package>
+                         (default mumble))
+  (user                  murmur-configuration-user
+                         (default "murmur"))
+  (group                 murmur-configuration-group
+                         (default "murmur"))
+  (port                  murmur-configuration-port
+                         (default 64738))
+  (welcome-text          murmur-configuration-welcome-text
+                         (default ""))
+  (server-password       murmur-configuration-server-password
+                         (default ""))
+  (max-users             murmur-configuration-max-users
+                         (default 100))
+  (max-user-bandwidth    murmur-configuration-max-user-bandwidth
+                         (default #f))
+  (database-file         murmur-configuration-database-file
+                         (default "/var/lib/murmur/db.sqlite"))
+  (log-file              murmur-configuration-log-file
+                         (default "/var/log/murmur/murmur.log"))
+  (pid-file              murmur-configuration-pid-file
+                         (default "/var/run/murmur/murmur.pid"))
+  (autoban-attempts      murmur-configuration-autoban-attempts
+                         (default 10))
+  (autoban-timeframe     murmur-configuration-autoban-timeframe
+                         (default 120))
+  (autoban-time          murmur-configuration-autoban-time
+                         (default 300))
+  (opus-threshold        murmur-configuration-opus-threshold
+                         (default 100)) ; integer percent
+  (channel-nesting-limit murmur-configuration-channel-nesting-limit
+                         (default 10))
+  (channelname-regex     murmur-configuration-channelname-regex
+                         (default #f))
+  (username-regex        murmur-configuration-username-regex
+                         (default #f))
+  (text-message-length   murmur-configuration-text-message-length
+                         (default 5000))
+  (image-message-length  murmur-configuration-image-message-length
+                         (default (* 128 1024))) ; 128 Kilobytes
+  (cert-required?         murmur-configuration-cert-required?
+                          (default #f))
+  (remember-channel?     murmur-configuration-remember-channel?
+                         (default #f))
+  (allow-html?           murmur-configuration-allow-html?
+                         (default #f))
+  (allow-ping?           murmur-configuration-allow-ping?
+                         (default #f))
+  (bonjour?              murmur-configuration-bonjour?
+                         (default #f))
+  (send-version?         murmur-configuration-send-version?
+                         (default #f))
+  (log-days              murmur-configuration-log-days
+                         (default 31))
+  (obfuscate-ips?        murmur-obfuscate-ips?
+                         (default #t))
+  (ssl-cert              murmur-configuration-ssl-cert
+                         (default #f))
+  (ssl-key               murmur-configuration-ssl-key
+                         (default #f))
+  (ssl-dh-params         murmur-configuration-ssl-dh-params
+                         (default #f))
+  (ssl-ciphers           murmur-configuration-ssl-ciphers
+                         (default #f))
+  (public-registration   murmur-configuration-public-registration
+                         (default #f))  ; <murmur-public-registration-configuration>
+  (file                  murmur-configuration-file
+                         (default #f)))
+
+(define-record-type* <murmur-public-registration-configuration>
+  murmur-public-registration-configuration
+  make-murmur-public-registration-configuration
+  murmur-public-registration-configuration?
+  (name         murmur-public-registration-configuration-name)
+  (password     murmur-public-registration-configuration-password)
+  (url          murmur-public-registration-configuration-url)
+  (hostname     murmur-public-registration-configuration-hostname
+                (default #f)))
+
+(define (flatten . lst)
+  "Return a list that recursively concatenates all sub-lists of LST."
+  (define (flatten1 head out)
+    (if (list? head)
+        (fold-right flatten1 out head)
+        (cons head out)))
+  (fold-right flatten1 '() lst))
+
+(define (default-murmur-config config)
+  (match-record
+   config
+   <murmur-configuration>
+   (user port welcome-text server-password max-users max-user-bandwidth
+    database-file log-file pid-file autoban-attempts autoban-timeframe
+    autoban-time opus-threshold channel-nesting-limit channelname-regex
+    username-regex text-message-length image-message-length cert-required?
+    remember-channel? allow-html? allow-ping? bonjour? send-version?
+    log-days obfuscate-ips? ssl-cert ssl-key ssl-dh-params ssl-ciphers
+    public-registration)
+   (apply mixed-text-file "murmur.ini"
+          (flatten
+           "welcometext=" welcome-text "\n"
+           "port=" (number->string port) "\n"
+           (if server-password (list "serverpassword=" server-password "\n") '())
+           (if max-user-bandwidth (list "bandwidth=" (number->string max-user-bandwidth)) '())
+           "users=" (number->string max-users) "\n"
+           "uname=" user "\n"
+           "database=" database-file "\n"
+           "logfile=" log-file "\n"
+           "pidfile=" pid-file "\n"
+           (if autoban-attempts (list "autobanAttempts=" (number->string autoban-attempts) "\n") '())
+           (if autoban-timeframe (list "autobanTimeframe=" (number->string autoban-timeframe) "\n") '())
+           (if autoban-time (list "autobanTime=" (number->string autoban-time) "\n") '())
+           (if opus-threshold (list "opusthreshold=" (number->string opus-threshold) "\n") '())
+           (if channel-nesting-limit (list "channelnestinglimit=" (number->string channel-nesting-limit) "\n") '())
+           (if channelname-regex (list "channelname=" channelname-regex "\n") '())
+           (if username-regex (list "username=" username-regex "\n") '())
+           (if text-message-length (list "textmessagelength=" (number->string text-message-length) "\n") '())
+           (if image-message-length (list "imagemessagelength=" (number->string image-message-length) "\n") '())
+           (if log-days (list "logdays=" (number->string log-days) "\n") '())
+           "obfuscate=" (if obfuscate-ips? "true" "false") "\n"
+           "certrequired=" (if cert-required? "true" "false") "\n"
+           "rememberchannel=" (if remember-channel? "true" "false") "\n"
+           "allowhtml=" (if allow-html? "true" "false") "\n"
+           "allowping=" (if allow-ping? "true" "false") "\n"
+           "bonjour=" (if bonjour? "true" "false") "\n"
+           "sendversion=" (if send-version? "true" "false") "\n"
+           (cond ((and ssl-cert ssl-key)
+                  (list
+                   "sslCert=" ssl-cert "\n"
+                   "sslKey=" ssl-key "\n"))
+                 ((or ssl-cert ssl-key)
+                  (error "ssl-cert and ssl-key must both be set"
+                         ssl-cert ssl-key))
+                 (else '()))
+           (if ssl-dh-params (list "sslDHParams=" ssl-dh-params) '())
+           (if ssl-ciphers (list "sslCiphers=" ssl-ciphers) '())
+
+           (match public-registration
+             (#f '())
+             (($ <murmur-public-registration-configuration>
+                 name password url hostname)
+              (if (and (or (not server-password) (string-null? server-password))
+                       allow-ping?)
+                  (list
+                   "registerName=" name "\n"
+                   "registerPassword=" password "\n"
+                   "registerUrl=" url "\n"
+                   (if hostname
+                       (string-append "registerHostname=" hostname "\n")
+                       ""))
+                  (error "To publicly register your murmur server your server must be publicy visible
+and users must be able to join without a password. To fix this set:
+(allow-ping? #t)
+(server-password \"\")
+Or set public-registration to #f"))))))))
+
+(define (murmur-activation config)
+  #~(begin
+      (use-modules (guix build utils))
+      (let* ((log-dir (dirname #$(murmur-configuration-log-file config)))
+             (pid-dir (dirname #$(murmur-configuration-pid-file config)))
+             (db-dir (dirname #$(murmur-configuration-database-file config)))
+             (user (getpwnam #$(murmur-configuration-user config)))
+             (init-dir
+              (lambda (name dir)
+                (format #t "creating murmur ~a directory '~a'\n" name dir)
+                (mkdir-p dir)
+                (chown dir (passwd:uid user) (passwd:gid user))
+                (chmod dir #o700)))
+             (ini #$(or (murmur-configuration-file config)
+                        (default-murmur-config config))))
+        (init-dir "log" log-dir)
+        (init-dir "pid" pid-dir)
+        (init-dir "database" db-dir)
+
+        (format #t "murmur: use config file: ~a~%\n" ini)
+        (format #t "murmur: to set the SuperUser password run:
+    `~a -ini ~a -readsupw`\n"
+                #$(file-append (murmur-configuration-package config)
+                               "/bin/murmurd") ini)
+        #t)))
+
+(define murmur-accounts
+  (match-lambda
+    (($ <murmur-configuration> _ user group)
+     (list
+      (user-group
+       (name group)
+       (system? #t))
+      (user-account
+       (name user)
+       (group group)
+       (system? #t)
+       (comment "Murmur Daemon")
+       (home-directory "/var/empty")
+       (shell (file-append shadow "/sbin/nologin")))))))
+
+(define (murmur-shepherd-service config)
+  (list (shepherd-service
+         (provision '(murmur))
+         (documentation "Run the Murmur Mumble server.")
+         (requirement '(networking))
+         (start #~(make-forkexec-constructor
+                   '(#$(file-append (murmur-configuration-package config)
+                                    "/bin/murmurd")
+                     "-ini"
+                     #$(or (murmur-configuration-file config)
+                           (default-murmur-config config)))
+                   #:pid-file #$(murmur-configuration-pid-file config)))
+         (stop #~(make-kill-destructor)))))
+
+(define murmur-service-type
+  (service-type (name 'murmur)
+                (description
+                 "Run the Murmur voice-over-IP (VoIP) server of the Mumble
+suite.")
+                (extensions
+                 (list (service-extension shepherd-root-service-type
+                                          murmur-shepherd-service)
+                       (service-extension activation-service-type
+                                          murmur-activation)
+                       (service-extension account-service-type
+                                          murmur-accounts)))
+                (default-value (murmur-configuration))))