services: Add inetd-service-type.

* gnu/services/networking.scm (<inetd-configuration>, <inetd-entry>): New
record types.
(inetd-config-file, inetd-shepherd-service): New procedures.
(inetd-service-type): New variable.
* doc/guix.texi (Networking Services): Document it.
* gnu/tests/networking.scm: New file.
* gnu/local.mk: Add it.

1 files changed, 149 insertions, 0 deletions

diff --git a/gnu/tests/networking.scm b/gnu/tests/networking.scm
new file mode 100644
index 0000000000..53c80a4ac1
--- /dev/null
+++ b/gnu/tests/networking.scm
@@ -0,0 +1,149 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2017 Thomas Danckaert <post@thomasdanckaert.be>
+;;;
+;;; 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 tests networking)
+  #:use-module (gnu tests)
+  #:use-module (gnu system)
+  #:use-module (gnu system grub)
+  #:use-module (gnu system file-systems)
+  #:use-module (gnu system shadow)
+  #:use-module (gnu system vm)
+  #:use-module (gnu services)
+  #:use-module (gnu services base)
+  #:use-module (gnu services networking)
+  #:use-module (guix gexp)
+  #:use-module (guix store)
+  #:use-module (guix monads)
+  #:use-module (gnu packages bash)
+  #:export (%test-inetd))
+
+(define %inetd-os
+  ;; Operating system with 2 inetd services.
+  (operating-system
+    (host-name "komputilo")
+    (timezone "Europe/Brussels")
+    (locale "en_US.utf8")
+
+    (bootloader (grub-configuration (device "/dev/sdX")))
+    (file-systems %base-file-systems)
+    (firmware '())
+    (users %base-user-accounts)
+    (services (cons* (dhcp-client-service)
+                     (service inetd-service-type
+                              (inetd-configuration
+                               (entries (list
+                                         (inetd-entry
+                                          (name "echo")
+                                          (socket-type 'stream)
+                                          (protocol "tcp")
+                                          (wait? #f)
+                                          (user "root"))
+                                         (inetd-entry
+                                          (name "dict")
+                                          (socket-type 'stream)
+                                          (protocol "tcp")
+                                          (wait? #f)
+                                          (user "root")
+                                          (program (file-append bash
+                                                                "/bin/bash"))
+                                          (arguments
+                                           (list "bash" (plain-file "my-dict.sh" "\
+while read line
+do
+    if [[ $line =~ ^DEFINE\\ (.*)$ ]]
+    then
+        case ${BASH_REMATCH[1]} in
+            Guix)
+                echo GNU Guix is a package management tool for the GNU system.
+                ;;
+            G-expression)
+                echo Like an S-expression but with a G.
+                ;;
+            *)
+                echo NO DEFINITION FOUND
+                ;;
+        esac
+    else
+        echo ERROR
+    fi
+done" ))))))))
+                     %base-services))))
+
+(define* (run-inetd-test)
+  "Run tests in %INETD-OS, where the inetd service provides an echo service on
+port 7, and a dict service on port 2628."
+  (mlet* %store-monad ((os -> (marionette-operating-system %inetd-os))
+                       (command (system-qemu-image/shared-store-script
+                                 os #:graphic? #f)))
+    (define test
+      (with-imported-modules '((gnu build marionette))
+        #~(begin
+            (use-modules (ice-9 rdelim)
+                         (srfi srfi-64)
+                         (gnu build marionette))
+            (define marionette
+              ;; Forward guest ports 7 and 2628 to host ports 8007 and 8628.
+              (make-marionette (list #$command "-net"
+                                     (string-append
+                                      "user"
+                                      ",hostfwd=tcp::8007-:7"
+                                      ",hostfwd=tcp::8628-:2628"))))
+
+            (mkdir #$output)
+            (chdir #$output)
+
+            (test-begin "inetd")
+
+            ;; Make sure the PID file is created.
+            (test-assert "PID file"
+              (marionette-eval
+               '(file-exists? "/var/run/inetd.pid")
+              marionette))
+
+            ;; Test the echo service.
+            (test-equal "echo response"
+              "Hello, Guix!"
+              (let ((echo (socket PF_INET SOCK_STREAM 0))
+                    (addr (make-socket-address AF_INET INADDR_LOOPBACK 8007)))
+                (connect echo addr)
+                (display "Hello, Guix!\n" echo)
+                (let ((response (read-line echo)))
+                  (close echo)
+                  response)))
+
+            ;; Test the dict service
+            (test-equal "dict response"
+              "GNU Guix is a package management tool for the GNU system."
+              (let ((dict (socket PF_INET SOCK_STREAM 0))
+                    (addr (make-socket-address AF_INET INADDR_LOOPBACK 8628)))
+                (connect dict addr)
+                (display "DEFINE Guix\n" dict)
+                (let ((response (read-line dict)))
+                  (close dict)
+                  response)))
+
+            (test-end)
+            (exit (= (test-runner-fail-count (test-runner-current)) 0)))))
+
+    (gexp->derivation "inetd-test" test)))
+
+(define %test-inetd
+  (system-test
+   (name "inetd")
+   (description "Connect to a host with an INETD server.")
+   (value (run-inetd-test))))