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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.
master
Thomas Danckaert 2017-03-14 18:12:34 +01:00 committed by Thomas Danckaert
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commit 9260b9d100
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96
doc/guix.texi
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@ -33,7 +33,8 @@ Copyright @copyright{} 2016 Alex ter Weele@*
Copyright @copyright{} 2017 Clément Lassieur@*
Copyright @copyright{} 2017 Mathieu Othacehe@*
Copyright @copyright{} 2017 Federico Beffa@*
Copyright @copyright{} 2017 Carlo Zancanaro
Copyright @copyright{} 2017 Carlo Zancanaro@*
Copyright @copyright{} 2017 Thomas Danckaert
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
@ -9400,6 +9401,99 @@ make an initial adjustment of more than 1,000 seconds.
List of host names used as the default NTP servers.
@end defvr
@cindex inetd
@deffn {Scheme variable} inetd-service-type
This service runs the @command{inetd} (@pxref{inetd invocation,,,
inetutils, GNU Inetutils}) daemon. @command{inetd} listens for
connections on internet sockets, and lazily starts the specified server
program when a connection is made on one of these sockets.
The value of this service is an @code{inetd-configuration} object. The
following example configures the @command{inetd} daemon to provide the
built-in @command{echo} service, as well as an smtp service which
forwards smtp traffic over ssh to a server @code{smtp-server} behind a
gateway @code{hostname}:
@example
(service
inetd-service-type
(inetd-configuration
(entries (list
(inetd-entry
(name "echo")
(socket-type 'stream)
(protocol "tcp")
(wait? #f)
(user "root"))
(inetd-entry
(node "127.0.0.1")
(name "smtp")
(socket-type 'stream)
(protocol "tcp")
(wait? #f)
(user "root")
(program (file-append openssh "/bin/ssh"))
(arguments
'("ssh" "-qT" "-i" "/path/to/ssh_key"
"-W" "smtp-server:25" "user@@hostname")))))
@end example
See below for more details about @code{inetd-configuration}.
@end deffn
@deftp {Data Type} inetd-configuration
Data type representing the configuration of @command{inetd}.
@table @asis
@item @code{program} (default: @code{(file-append inetutils "/libexec/inetd")})
The @command{inetd} executable to use.
@item @code{entries} (default: @code{'()})
A list of @command{inetd} service entries. Each entry should be created
by the @code{inetd-entry} constructor.
@end table
@end deftp
@deftp {Data Type} inetd-entry
Data type representing an entry in the @command{inetd} configuration.
Each entry corresponds to a socket where @command{inetd} will listen for
requests.
@table @asis
@item @code{node} (default: @code{#f})
Optional string, a comma-separated list of local addresses
@command{inetd} should use when listening for this service.
@xref{Configuration file,,, inetutils, GNU Inetutils} for a complete
description of all options.
@item @code{name}
A string, the name must correspond to an entry in @code{/etc/services}.
@item @code{socket-type}
One of @code{'stream}, @code{'dgram}, @code{'raw}, @code{'rdm} or
@code{'seqpacket}.
@item @code{protocol}
A string, must correspond to an entry in @code{/etc/protocols}.
@item @code{wait?} (default: @code{#t})
Whether @command{inetd} should wait for the server to exit before
listening to new service requests.
@item @code{user}
A string containing the user (and, optionally, group) name of the user
as whom the server should run. The group name can be specified in a
suffix, separated by a colon or period, i.e. @code{"user"},
@code{"user:group"} or @code{"user.group"}.
@item @code{program} (default: @code{"internal"})
The server program which will serve the requests, or @code{"internal"}
if @command{inetd} should use a built-in service.
@item @code{arguments} (default: @code{'()})
A list strings or file-like objects, which are the server program's
arguments, starting with the zeroth argument, i.e. the name of the
program itself. For @command{inetd}'s internal services, this entry
must be @code{'()} or @code{'("internal")}.
@end table
@xref{Configuration file,,, inetutils, GNU Inetutils} for a more
detailed discussion of each configuration field.
@end deftp
@cindex Tor
@deffn {Scheme Procedure} tor-service [@var{config-file}] [#:tor @var{tor}]
Return a service to run the @uref{https://torproject.org, Tor} anonymous

1
gnu/local.mk
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@ -464,6 +464,7 @@ GNU_SYSTEM_MODULES = \
%D%/tests/install.scm \
%D%/tests/mail.scm \
%D%/tests/messaging.scm \
%D%/tests/networking.scm \
%D%/tests/ssh.scm \
%D%/tests/web.scm

89
gnu/services/networking.scm
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@ -4,6 +4,7 @@
;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2016 John Darrington <jmd@gnu.org>
;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
;;; Copyright © 2017 Thomas Danckaert <post@thomasdanckaert.be>
;;;
;;; This file is part of GNU Guix.
;;;
@ -61,6 +62,10 @@
ntp-service
ntp-service-type
inetd-configuration
inetd-entry
inetd-service-type
tor-configuration
tor-configuration?
tor-hidden-service
@ -430,6 +435,90 @@ make an initial adjustment of more than 1,000 seconds."
(allow-large-adjustment?
allow-large-adjustment?))))
;;;
;;; Inetd.
;;;
(define-record-type* <inetd-configuration> inetd-configuration
make-inetd-configuration
inetd-configuration?
(program inetd-configuration-program ;file-like
(default (file-append inetutils "/libexec/inetd")))
(entries inetd-configuration-entries ;list of <inetd-entry>
(default '())))
(define-record-type* <inetd-entry> inetd-entry make-inetd-entry
inetd-entry?
(node inetd-entry-node ;string or #f
(default #f))
(name inetd-entry-name) ;string, from /etc/services
(socket-type inetd-entry-socket-type) ;stream | dgram | raw |
;rdm | seqpacket
(protocol inetd-entry-protocol) ;string, from /etc/protocols
(wait? inetd-entry-wait? ;Boolean
(default #t))
(user inetd-entry-user) ;string
(program inetd-entry-program ;string or file-like object
(default "internal"))
(arguments inetd-entry-arguments ;list of strings or file-like objects
(default '())))
(define (inetd-config-file entries)
(apply mixed-text-file "inetd.conf"
(map
(lambda (entry)
(let* ((node (inetd-entry-node entry))
(name (inetd-entry-name entry))
(socket
(if node (string-append node ":" name) name))
(type
(match (inetd-entry-socket-type entry)
((or 'stream 'dgram 'raw 'rdm 'seqpacket)
(symbol->string (inetd-entry-socket-type entry)))))
(protocol (inetd-entry-protocol entry))
(wait (if (inetd-entry-wait? entry) "wait" "nowait"))
(user (inetd-entry-user entry))
(program (inetd-entry-program entry))
(args (inetd-entry-arguments entry)))
#~(string-append
(string-join
(list #$@(list socket type protocol wait user program) #$@args)
" ") "\n")))
entries)))
(define inetd-shepherd-service
(match-lambda
(($ <inetd-configuration> program ()) '()) ; empty list of entries -> do nothing
(($ <inetd-configuration> program entries)
(list
(shepherd-service
(documentation "Run inetd.")
(provision '(inetd))
(requirement '(user-processes networking syslogd))
(start #~(make-forkexec-constructor
(list #$program #$(inetd-config-file entries))
#:pid-file "/var/run/inetd.pid"))
(stop #~(make-kill-destructor)))))))
(define-public inetd-service-type
(service-type
(name 'inetd)
(extensions
(list (service-extension shepherd-root-service-type
inetd-shepherd-service)))
;; The service can be extended with additional lists of entries.
(compose concatenate)
(extend (lambda (config entries)
(inetd-configuration
(inherit config)
(entries (append (inetd-configuration-entries config)
entries)))))))
;;;
;;; Tor.

149
gnu/tests/networking.scm Normal file
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@ -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))))