656 lines
24 KiB
Scheme
656 lines
24 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu services networking)
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#:use-module (gnu services)
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#:use-module (gnu services shepherd)
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#:use-module (gnu services dbus)
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#:use-module (gnu system shadow)
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#:use-module (gnu system pam)
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#:use-module (gnu packages admin)
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#:use-module (gnu packages linux)
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#:use-module (gnu packages tor)
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#:use-module (gnu packages messaging)
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#:use-module (gnu packages ntp)
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#:use-module (gnu packages wicd)
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#:use-module (gnu packages gnome)
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#:use-module (guix gexp)
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#:use-module (guix records)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-26)
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#:use-module (ice-9 match)
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#:export (%facebook-host-aliases
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static-networking-service
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dhcp-client-service
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%ntp-servers
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ntp-service
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tor-hidden-service
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tor-service
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bitlbee-service
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wicd-service
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network-manager-service))
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;;; Commentary:
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;;;
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;;; Networking services.
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;;;
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;;; Code:
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(define %facebook-host-aliases
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;; This is the list of known Facebook hosts to be added to /etc/hosts if you
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;; are to block it.
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"\
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# Block Facebook IPv4.
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127.0.0.1 www.facebook.com
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127.0.0.1 facebook.com
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127.0.0.1 login.facebook.com
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127.0.0.1 www.login.facebook.com
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127.0.0.1 fbcdn.net
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127.0.0.1 www.fbcdn.net
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127.0.0.1 fbcdn.com
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127.0.0.1 www.fbcdn.com
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127.0.0.1 static.ak.fbcdn.net
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127.0.0.1 static.ak.connect.facebook.com
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127.0.0.1 connect.facebook.net
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127.0.0.1 www.connect.facebook.net
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127.0.0.1 apps.facebook.com
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# Block Facebook IPv6.
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fe80::1%lo0 facebook.com
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fe80::1%lo0 login.facebook.com
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fe80::1%lo0 www.login.facebook.com
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fe80::1%lo0 fbcdn.net
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fe80::1%lo0 www.fbcdn.net
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fe80::1%lo0 fbcdn.com
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fe80::1%lo0 www.fbcdn.com
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fe80::1%lo0 static.ak.fbcdn.net
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fe80::1%lo0 static.ak.connect.facebook.com
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fe80::1%lo0 connect.facebook.net
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fe80::1%lo0 www.connect.facebook.net
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fe80::1%lo0 apps.facebook.com\n")
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(define-record-type* <static-networking>
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static-networking make-static-networking
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static-networking?
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(interface static-networking-interface)
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(ip static-networking-ip)
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(gateway static-networking-gateway)
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(provision static-networking-provision)
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(name-servers static-networking-name-servers)
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(net-tools static-networking-net-tools))
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(define static-networking-service-type
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(dmd-service-type
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'static-networking
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(match-lambda
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(($ <static-networking> interface ip gateway provision
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name-servers net-tools)
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(let ((loopback? (memq 'loopback provision)))
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;; TODO: Eventually replace 'route' with bindings for the appropriate
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;; ioctls.
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(dmd-service
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;; Unless we're providing the loopback interface, wait for udev to be up
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;; and running so that INTERFACE is actually usable.
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(requirement (if loopback? '() '(udev)))
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(documentation
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"Bring up the networking interface using a static IP address.")
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(provision provision)
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(start #~(lambda _
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;; Return #t if successfully started.
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(let* ((addr (inet-pton AF_INET #$ip))
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(sockaddr (make-socket-address AF_INET addr 0)))
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(configure-network-interface #$interface sockaddr
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(logior IFF_UP
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#$(if loopback?
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#~IFF_LOOPBACK
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0))))
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#$(if gateway
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#~(zero? (system* (string-append #$net-tools
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"/sbin/route")
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"add" "-net" "default"
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"gw" #$gateway))
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#t)
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#$(if (pair? name-servers)
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#~(call-with-output-file "/etc/resolv.conf"
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(lambda (port)
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(display
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"# Generated by 'static-networking-service'.\n"
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port)
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(for-each (lambda (server)
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(format port "nameserver ~a~%"
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server))
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'#$name-servers)))
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#t)))
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(stop #~(lambda _
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;; Return #f is successfully stopped.
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(let ((sock (socket AF_INET SOCK_STREAM 0)))
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(set-network-interface-flags sock #$interface 0)
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(close-port sock))
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(not #$(if gateway
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#~(system* (string-append #$net-tools
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"/sbin/route")
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"del" "-net" "default")
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#t))))
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(respawn? #f)))))))
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(define* (static-networking-service interface ip
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#:key
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gateway
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(provision '(networking))
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(name-servers '())
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(net-tools net-tools))
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"Return a service that starts @var{interface} with address @var{ip}. If
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@var{gateway} is true, it must be a string specifying the default network
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gateway."
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(service static-networking-service-type
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(static-networking (interface interface) (ip ip)
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(gateway gateway)
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(provision provision)
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(name-servers name-servers)
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(net-tools net-tools))))
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(define dhcp-client-service-type
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(dmd-service-type
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'dhcp-client
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(lambda (dhcp)
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(define dhclient
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#~(string-append #$dhcp "/sbin/dhclient"))
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(define pid-file
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"/var/run/dhclient.pid")
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(dmd-service
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(documentation "Set up networking via DHCP.")
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(requirement '(user-processes udev))
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;; XXX: Running with '-nw' ("no wait") avoids blocking for a minute when
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;; networking is unavailable, but also means that the interface is not up
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;; yet when 'start' completes. To wait for the interface to be ready, one
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;; should instead monitor udev events.
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(provision '(networking))
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(start #~(lambda _
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;; When invoked without any arguments, 'dhclient' discovers all
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;; non-loopback interfaces *that are up*. However, the relevant
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;; interfaces are typically down at this point. Thus we perform
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;; our own interface discovery here.
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(define valid?
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(negate loopback-network-interface?))
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(define ifaces
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(filter valid? (all-network-interface-names)))
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;; XXX: Make sure the interfaces are up so that 'dhclient' can
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;; actually send/receive over them.
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(for-each set-network-interface-up ifaces)
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(false-if-exception (delete-file #$pid-file))
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(let ((pid (fork+exec-command
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(cons* #$dhclient "-nw"
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"-pf" #$pid-file ifaces))))
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(and (zero? (cdr (waitpid pid)))
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(let loop ()
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(catch 'system-error
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(lambda ()
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(call-with-input-file #$pid-file read))
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(lambda args
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;; 'dhclient' returned before PID-FILE was created,
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;; so try again.
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(let ((errno (system-error-errno args)))
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(if (= ENOENT errno)
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(begin
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(sleep 1)
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(loop))
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(apply throw args))))))))))
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(stop #~(make-kill-destructor))))))
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(define* (dhcp-client-service #:key (dhcp isc-dhcp))
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"Return a service that runs @var{dhcp}, a Dynamic Host Configuration
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Protocol (DHCP) client, on all the non-loopback network interfaces."
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(service dhcp-client-service-type dhcp))
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(define %ntp-servers
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;; Default set of NTP servers.
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'("0.pool.ntp.org"
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"1.pool.ntp.org"
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"2.pool.ntp.org"))
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;;;
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;;; NTP.
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;;;
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;; TODO: Export.
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(define-record-type* <ntp-configuration>
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ntp-configuration make-ntp-configuration
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ntp-configuration?
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(ntp ntp-configuration-ntp
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(default ntp))
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(servers ntp-configuration-servers))
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(define ntp-dmd-service
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(match-lambda
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(($ <ntp-configuration> ntp servers)
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(let ()
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;; TODO: Add authentication support.
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(define config
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(string-append "driftfile /var/run/ntp.drift\n"
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(string-join (map (cut string-append "server " <>)
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servers)
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"\n")
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"
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# Disable status queries as a workaround for CVE-2013-5211:
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# <http://support.ntp.org/bin/view/Main/SecurityNotice#DRDoS_Amplification_Attack_using>.
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restrict default kod nomodify notrap nopeer noquery
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restrict -6 default kod nomodify notrap nopeer noquery
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# Yet, allow use of the local 'ntpq'.
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restrict 127.0.0.1
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restrict -6 ::1\n"))
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(define ntpd.conf
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(plain-file "ntpd.conf" config))
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(list (dmd-service
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(provision '(ntpd))
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(documentation "Run the Network Time Protocol (NTP) daemon.")
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(requirement '(user-processes networking))
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(start #~(make-forkexec-constructor
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(list (string-append #$ntp "/bin/ntpd") "-n"
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"-c" #$ntpd.conf "-u" "ntpd")))
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(stop #~(make-kill-destructor))))))))
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(define %ntp-accounts
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(list (user-account
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(name "ntpd")
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(group "nogroup")
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(system? #t)
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(comment "NTP daemon user")
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(home-directory "/var/empty")
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(shell #~(string-append #$shadow "/sbin/nologin")))))
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(define ntp-service-type
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(service-type (name 'ntp)
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(extensions
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(list (service-extension dmd-root-service-type
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ntp-dmd-service)
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(service-extension account-service-type
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(const %ntp-accounts))))))
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(define* (ntp-service #:key (ntp ntp)
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(servers %ntp-servers))
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"Return a service that runs the daemon from @var{ntp}, the
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@uref{http://www.ntp.org, Network Time Protocol package}. The daemon will
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keep the system clock synchronized with that of @var{servers}."
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(service ntp-service-type
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(ntp-configuration (ntp ntp) (servers servers))))
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;;;
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;;; Tor.
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;;;
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(define-record-type* <tor-configuration>
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tor-configuration make-tor-configuration
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tor-configuration?
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(tor tor-configuration-tor
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(default tor))
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(config-file tor-configuration-config-file)
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(hidden-services tor-configuration-hidden-services
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(default '())))
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(define %tor-accounts
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;; User account and groups for Tor.
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(list (user-group (name "tor") (system? #t))
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(user-account
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(name "tor")
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(group "tor")
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(system? #t)
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(comment "Tor daemon user")
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(home-directory "/var/empty")
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(shell #~(string-append #$shadow "/sbin/nologin")))))
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(define-record-type <hidden-service>
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(hidden-service name mapping)
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hidden-service?
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(name hidden-service-name) ;string
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(mapping hidden-service-mapping)) ;list of port/address tuples
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(define (tor-configuration->torrc config)
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"Return a 'torrc' file for CONFIG."
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(match config
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(($ <tor-configuration> tor config-file services)
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(computed-file
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"torrc"
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#~(begin
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(use-modules (guix build utils)
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(ice-9 match))
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(call-with-output-file #$output
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(lambda (port)
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(display "\
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# The beginning was automatically added.
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User tor
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DataDirectory /var/lib/tor
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Log notice syslog\n" port)
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(for-each (match-lambda
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((service (ports hosts) ...)
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(format port "\
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HiddenServiceDir /var/lib/tor/hidden-services/~a~%"
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service)
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(for-each (lambda (tcp-port host)
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(format port "\
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HiddenServicePort ~a ~a~%"
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tcp-port host))
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ports hosts)))
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'#$(map (match-lambda
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(($ <hidden-service> name mapping)
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(cons name mapping)))
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services))
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;; Append the user's config file.
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(call-with-input-file #$config-file
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(lambda (input)
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(dump-port input port)))
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#t)))
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#:modules '((guix build utils))))))
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(define (tor-dmd-service config)
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"Return a <dmd-service> running TOR."
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(match config
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(($ <tor-configuration> tor)
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(let ((torrc (tor-configuration->torrc config)))
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(list (dmd-service
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(provision '(tor))
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;; Tor needs at least one network interface to be up, hence the
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;; dependency on 'loopback'.
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(requirement '(user-processes loopback syslogd))
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(start #~(make-forkexec-constructor
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(list (string-append #$tor "/bin/tor") "-f" #$torrc)))
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(stop #~(make-kill-destructor))
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(documentation "Run the Tor anonymous network overlay.")))))))
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(define (tor-hidden-service-activation config)
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"Return the activation gexp for SERVICES, a list of hidden services."
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#~(begin
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(use-modules (guix build utils))
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(define %user
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(getpw "tor"))
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(define (initialize service)
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(let ((directory (string-append "/var/lib/tor/hidden-services/"
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service)))
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(mkdir-p directory)
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(chown directory (passwd:uid %user) (passwd:gid %user))
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;; The daemon bails out if we give wider permissions.
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(chmod directory #o700)))
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(mkdir-p "/var/lib/tor")
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(chown "/var/lib/tor" (passwd:uid %user) (passwd:gid %user))
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(chmod "/var/lib/tor" #o700)
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(for-each initialize
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'#$(map hidden-service-name
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(tor-configuration-hidden-services config)))))
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(define tor-service-type
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(service-type (name 'tor)
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(extensions
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(list (service-extension dmd-root-service-type
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tor-dmd-service)
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(service-extension account-service-type
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(const %tor-accounts))
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(service-extension activation-service-type
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tor-hidden-service-activation)))
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;; This can be extended with hidden services.
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(compose concatenate)
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(extend (lambda (config services)
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(tor-configuration
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(inherit config)
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(hidden-services
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(append (tor-configuration-hidden-services config)
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services)))))))
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(define* (tor-service #:optional
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(config-file (plain-file "empty" ""))
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#:key (tor tor))
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"Return a service to run the @uref{https://torproject.org, Tor} anonymous
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networking daemon.
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The daemon runs as the @code{tor} unprivileged user. It is passed
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@var{config-file}, a file-like object, with an additional @code{User tor} line
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and lines for hidden services added via @code{tor-hidden-service}. Run
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@command{man tor} for information about the configuration file."
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(service tor-service-type
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(tor-configuration (tor tor)
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(config-file config-file))))
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(define tor-hidden-service-type
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;; A type that extends Tor with hidden services.
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(service-type (name 'tor-hidden-service)
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(extensions
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(list (service-extension tor-service-type list)))))
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(define (tor-hidden-service name mapping)
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"Define a new Tor @dfn{hidden service} called @var{name} and implementing
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@var{mapping}. @var{mapping} is a list of port/host tuples, such as:
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@example
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'((22 \"127.0.0.1:22\")
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(80 \"127.0.0.1:8080\"))
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@end example
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In this example, port 22 of the hidden service is mapped to local port 22, and
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port 80 is mapped to local port 8080.
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This creates a @file{/var/lib/tor/hidden-services/@var{name}} directory, where
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the @file{hostname} file contains the @code{.onion} host name for the hidden
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service.
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See @uref{https://www.torproject.org/docs/tor-hidden-service.html.en, the Tor
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project's documentation} for more information."
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(service tor-hidden-service-type
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(hidden-service name mapping)))
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;;;
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;;; BitlBee.
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;;;
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(define-record-type* <bitlbee-configuration>
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bitlbee-configuration make-bitlbee-configuration
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bitlbee-configuration?
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(bitlbee bitlbee-configuration-bitlbee
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(default bitlbee))
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(interface bitlbee-configuration-interface)
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(port bitlbee-configuration-port)
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(extra-settings bitlbee-configuration-extra-settings))
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(define bitlbee-dmd-service
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(match-lambda
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(($ <bitlbee-configuration> bitlbee interface port extra-settings)
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(let ((conf (plain-file "bitlbee.conf"
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(string-append "
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[settings]
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User = bitlbee
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ConfigDir = /var/lib/bitlbee
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DaemonInterface = " interface "
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DaemonPort = " (number->string port) "
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" extra-settings))))
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|
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(list (dmd-service
|
||
(provision '(bitlbee))
|
||
(requirement '(user-processes loopback))
|
||
(start #~(make-forkexec-constructor
|
||
(list (string-append #$bitlbee "/sbin/bitlbee")
|
||
"-n" "-F" "-u" "bitlbee" "-c" #$conf)))
|
||
(stop #~(make-kill-destructor))))))))
|
||
|
||
(define %bitlbee-accounts
|
||
;; User group and account to run BitlBee.
|
||
(list (user-group (name "bitlbee") (system? #t))
|
||
(user-account
|
||
(name "bitlbee")
|
||
(group "bitlbee")
|
||
(system? #t)
|
||
(comment "BitlBee daemon user")
|
||
(home-directory "/var/empty")
|
||
(shell #~(string-append #$shadow "/sbin/nologin")))))
|
||
|
||
(define %bitlbee-activation
|
||
;; Activation gexp for BitlBee.
|
||
#~(begin
|
||
(use-modules (guix build utils))
|
||
|
||
;; This directory is used to store OTR data.
|
||
(mkdir-p "/var/lib/bitlbee")
|
||
(let ((user (getpwnam "bitlbee")))
|
||
(chown "/var/lib/bitlbee"
|
||
(passwd:uid user) (passwd:gid user)))))
|
||
|
||
(define bitlbee-service-type
|
||
(service-type (name 'bitlbee)
|
||
(extensions
|
||
(list (service-extension dmd-root-service-type
|
||
bitlbee-dmd-service)
|
||
(service-extension account-service-type
|
||
(const %bitlbee-accounts))
|
||
(service-extension activation-service-type
|
||
(const %bitlbee-activation))))))
|
||
|
||
(define* (bitlbee-service #:key (bitlbee bitlbee)
|
||
(interface "127.0.0.1") (port 6667)
|
||
(extra-settings ""))
|
||
"Return a service that runs @url{http://bitlbee.org,BitlBee}, a daemon that
|
||
acts as a gateway between IRC and chat networks.
|
||
|
||
The daemon will listen to the interface corresponding to the IP address
|
||
specified in @var{interface}, on @var{port}. @code{127.0.0.1} means that only
|
||
local clients can connect, whereas @code{0.0.0.0} means that connections can
|
||
come from any networking interface.
|
||
|
||
In addition, @var{extra-settings} specifies a string to append to the
|
||
configuration file."
|
||
(service bitlbee-service-type
|
||
(bitlbee-configuration
|
||
(bitlbee bitlbee)
|
||
(interface interface) (port port)
|
||
(extra-settings extra-settings))))
|
||
|
||
|
||
;;;
|
||
;;; Wicd.
|
||
;;;
|
||
|
||
(define %wicd-activation
|
||
;; Activation gexp for Wicd.
|
||
#~(begin
|
||
(use-modules (guix build utils))
|
||
|
||
(mkdir-p "/etc/wicd")
|
||
(let ((file-name "/etc/wicd/dhclient.conf.template.default"))
|
||
(unless (file-exists? file-name)
|
||
(copy-file (string-append #$wicd file-name)
|
||
file-name)))))
|
||
|
||
(define (wicd-dmd-service wicd)
|
||
"Return a dmd service for WICD."
|
||
(list (dmd-service
|
||
(documentation "Run the Wicd network manager.")
|
||
(provision '(networking))
|
||
(requirement '(user-processes dbus-system loopback))
|
||
(start #~(make-forkexec-constructor
|
||
(list (string-append #$wicd "/sbin/wicd")
|
||
"--no-daemon")))
|
||
(stop #~(make-kill-destructor)))))
|
||
|
||
(define wicd-service-type
|
||
(service-type (name 'wicd)
|
||
(extensions
|
||
(list (service-extension dmd-root-service-type
|
||
wicd-dmd-service)
|
||
(service-extension dbus-root-service-type
|
||
list)
|
||
(service-extension activation-service-type
|
||
(const %wicd-activation))
|
||
|
||
;; Add Wicd to the global profile.
|
||
(service-extension profile-service-type list)))))
|
||
|
||
(define* (wicd-service #:key (wicd wicd))
|
||
"Return a service that runs @url{https://launchpad.net/wicd,Wicd}, a network
|
||
management daemon that aims to simplify wired and wireless networking.
|
||
|
||
This service adds the @var{wicd} package to the global profile, providing
|
||
several commands to interact with the daemon and configure networking:
|
||
@command{wicd-client}, a graphical user interface, and the @command{wicd-cli}
|
||
and @command{wicd-curses} user interfaces."
|
||
(service wicd-service-type wicd))
|
||
|
||
|
||
;;;
|
||
;;; NetworkManager
|
||
;;;
|
||
|
||
(define %network-manager-activation
|
||
;; Activation gexp for NetworkManager.
|
||
#~(begin
|
||
(use-modules (guix build utils))
|
||
(mkdir-p "/etc/NetworkManager/system-connections")))
|
||
|
||
(define (network-manager-dmd-service network-manager)
|
||
"Return a dmd service for NETWORK-MANAGER."
|
||
(list (dmd-service
|
||
(documentation "Run the NetworkManager.")
|
||
(provision '(networking))
|
||
(requirement '(user-processes dbus-system loopback))
|
||
(start #~(make-forkexec-constructor
|
||
(list (string-append #$network-manager
|
||
"/sbin/NetworkManager")
|
||
"--no-daemon")))
|
||
(stop #~(make-kill-destructor)))))
|
||
|
||
(define network-manager-service-type
|
||
(service-type (name 'network-manager)
|
||
(extensions
|
||
(list (service-extension dmd-root-service-type
|
||
network-manager-dmd-service)
|
||
(service-extension dbus-root-service-type list)
|
||
(service-extension activation-service-type
|
||
(const %network-manager-activation))
|
||
;; Add network-manager to the system profile.
|
||
(service-extension profile-service-type list)))))
|
||
|
||
(define* (network-manager-service #:key (network-manager network-manager))
|
||
"Return a service that runs NetworkManager, a network connection manager
|
||
that attempting to keep active network connectivity when available."
|
||
(service network-manager-service-type network-manager))
|
||
|
||
;;; networking.scm ends here
|