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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
;;;
;;; 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 networking)
#:use-module (gnu services)
#:use-module (gnu services shepherd)
#:use-module (gnu services dbus)
#:use-module (gnu system shadow)
#:use-module (gnu system pam)
#:use-module (gnu packages admin)
#:use-module (gnu packages connman)
#:use-module (gnu packages linux)
#:use-module (gnu packages tor)
#:use-module (gnu packages messaging)
#:use-module (gnu packages ntp)
#:use-module (gnu packages wicd)
#:use-module (gnu packages gnome)
#:use-module (guix gexp)
#:use-module (guix records)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9)
#:use-module (srfi srfi-26)
#:use-module (ice-9 match)
#:export (%facebook-host-aliases
static-networking-service
dhcp-client-service
%ntp-servers
ntp-service
tor-hidden-service
tor-service
bitlbee-service
wicd-service
network-manager-service
connman-service))
;;; Commentary:
;;;
;;; Networking services.
;;;
;;; Code:
(define %facebook-host-aliases
;; This is the list of known Facebook hosts to be added to /etc/hosts if you
;; are to block it.
"\
# Block Facebook IPv4.
127.0.0.1 www.facebook.com
127.0.0.1 facebook.com
127.0.0.1 login.facebook.com
127.0.0.1 www.login.facebook.com
127.0.0.1 fbcdn.net
127.0.0.1 www.fbcdn.net
127.0.0.1 fbcdn.com
127.0.0.1 www.fbcdn.com
127.0.0.1 static.ak.fbcdn.net
127.0.0.1 static.ak.connect.facebook.com
127.0.0.1 connect.facebook.net
127.0.0.1 www.connect.facebook.net
127.0.0.1 apps.facebook.com
# Block Facebook IPv6.
fe80::1%lo0 facebook.com
fe80::1%lo0 login.facebook.com
fe80::1%lo0 www.login.facebook.com
fe80::1%lo0 fbcdn.net
fe80::1%lo0 www.fbcdn.net
fe80::1%lo0 fbcdn.com
fe80::1%lo0 www.fbcdn.com
fe80::1%lo0 static.ak.fbcdn.net
fe80::1%lo0 static.ak.connect.facebook.com
fe80::1%lo0 connect.facebook.net
fe80::1%lo0 www.connect.facebook.net
fe80::1%lo0 apps.facebook.com\n")
(define-record-type* <static-networking>
static-networking make-static-networking
static-networking?
(interface static-networking-interface)
(ip static-networking-ip)
(gateway static-networking-gateway)
(provision static-networking-provision)
(name-servers static-networking-name-servers)
(net-tools static-networking-net-tools))
(define static-networking-service-type
(shepherd-service-type
'static-networking
(match-lambda
(($ <static-networking> interface ip gateway provision
name-servers net-tools)
(let ((loopback? (memq 'loopback provision)))
;; TODO: Eventually replace 'route' with bindings for the appropriate
;; ioctls.
(shepherd-service
;; Unless we're providing the loopback interface, wait for udev to be up
;; and running so that INTERFACE is actually usable.
(requirement (if loopback? '() '(udev)))
(documentation
"Bring up the networking interface using a static IP address.")
(provision provision)
(start #~(lambda _
;; Return #t if successfully started.
(let* ((addr (inet-pton AF_INET #$ip))
(sockaddr (make-socket-address AF_INET addr 0)))
(configure-network-interface #$interface sockaddr
(logior IFF_UP
#$(if loopback?
#~IFF_LOOPBACK
0))))
#$(if gateway
#~(zero? (system* (string-append #$net-tools
"/sbin/route")
"add" "-net" "default"
"gw" #$gateway))
#t)
#$(if (pair? name-servers)
#~(call-with-output-file "/etc/resolv.conf"
(lambda (port)
(display
"# Generated by 'static-networking-service'.\n"
port)
(for-each (lambda (server)
(format port "nameserver ~a~%"
server))
'#$name-servers)))
#t)))
(stop #~(lambda _
;; Return #f is successfully stopped.
(let ((sock (socket AF_INET SOCK_STREAM 0)))
(set-network-interface-flags sock #$interface 0)
(close-port sock))
(not #$(if gateway
#~(system* (string-append #$net-tools
"/sbin/route")
"del" "-net" "default")
#t))))
(respawn? #f)))))))
(define* (static-networking-service interface ip
#:key
gateway
(provision '(networking))
(name-servers '())
(net-tools net-tools))
"Return a service that starts @var{interface} with address @var{ip}. If
@var{gateway} is true, it must be a string specifying the default network
gateway."
(service static-networking-service-type
(static-networking (interface interface) (ip ip)
(gateway gateway)
(provision provision)
(name-servers name-servers)
(net-tools net-tools))))
(define dhcp-client-service-type
(shepherd-service-type
'dhcp-client
(lambda (dhcp)
(define dhclient
#~(string-append #$dhcp "/sbin/dhclient"))
(define pid-file
"/var/run/dhclient.pid")
(shepherd-service
(documentation "Set up networking via DHCP.")
(requirement '(user-processes udev))
;; XXX: Running with '-nw' ("no wait") avoids blocking for a minute when
;; networking is unavailable, but also means that the interface is not up
;; yet when 'start' completes. To wait for the interface to be ready, one
;; should instead monitor udev events.
(provision '(networking))
(start #~(lambda _
;; When invoked without any arguments, 'dhclient' discovers all
;; non-loopback interfaces *that are up*. However, the relevant
;; interfaces are typically down at this point. Thus we perform
;; our own interface discovery here.
(define valid?
(negate loopback-network-interface?))
(define ifaces
(filter valid? (all-network-interface-names)))
;; XXX: Make sure the interfaces are up so that 'dhclient' can
;; actually send/receive over them.
(for-each set-network-interface-up ifaces)
(false-if-exception (delete-file #$pid-file))
(let ((pid (fork+exec-command
(cons* #$dhclient "-nw"
"-pf" #$pid-file ifaces))))
(and (zero? (cdr (waitpid pid)))
(let loop ()
(catch 'system-error
(lambda ()
(call-with-input-file #$pid-file read))
(lambda args
;; 'dhclient' returned before PID-FILE was created,
;; so try again.
(let ((errno (system-error-errno args)))
(if (= ENOENT errno)
(begin
(sleep 1)
(loop))
(apply throw args))))))))))
(stop #~(make-kill-destructor))))))
(define* (dhcp-client-service #:key (dhcp isc-dhcp))
"Return a service that runs @var{dhcp}, a Dynamic Host Configuration
Protocol (DHCP) client, on all the non-loopback network interfaces."
(service dhcp-client-service-type dhcp))
(define %ntp-servers
;; Default set of NTP servers.
'("0.pool.ntp.org"
"1.pool.ntp.org"
"2.pool.ntp.org"))
;;;
;;; NTP.
;;;
;; TODO: Export.
(define-record-type* <ntp-configuration>
ntp-configuration make-ntp-configuration
ntp-configuration?
(ntp ntp-configuration-ntp
(default ntp))
(servers ntp-configuration-servers))
(define ntp-shepherd-service
(match-lambda
(($ <ntp-configuration> ntp servers)
(let ()
;; TODO: Add authentication support.
(define config
(string-append "driftfile /var/run/ntp.drift\n"
(string-join (map (cut string-append "server " <>)
servers)
"\n")
"
# Disable status queries as a workaround for CVE-2013-5211:
# <http://support.ntp.org/bin/view/Main/SecurityNotice#DRDoS_Amplification_Attack_using>.
restrict default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery
# Yet, allow use of the local 'ntpq'.
restrict 127.0.0.1
restrict -6 ::1\n"))
(define ntpd.conf
(plain-file "ntpd.conf" config))
(list (shepherd-service
(provision '(ntpd))
(documentation "Run the Network Time Protocol (NTP) daemon.")
(requirement '(user-processes networking))
(start #~(make-forkexec-constructor
(list (string-append #$ntp "/bin/ntpd") "-n"
"-c" #$ntpd.conf "-u" "ntpd")))
(stop #~(make-kill-destructor))))))))
(define %ntp-accounts
(list (user-account
(name "ntpd")
(group "nogroup")
(system? #t)
(comment "NTP daemon user")
(home-directory "/var/empty")
(shell #~(string-append #$shadow "/sbin/nologin")))))
(define ntp-service-type
(service-type (name 'ntp)
(extensions
(list (service-extension shepherd-root-service-type
ntp-shepherd-service)
(service-extension account-service-type
(const %ntp-accounts))))))
(define* (ntp-service #:key (ntp ntp)
(servers %ntp-servers))
"Return a service that runs the daemon from @var{ntp}, the
@uref{http://www.ntp.org, Network Time Protocol package}. The daemon will
keep the system clock synchronized with that of @var{servers}."
(service ntp-service-type
(ntp-configuration (ntp ntp) (servers servers))))
;;;
;;; Tor.
;;;
(define-record-type* <tor-configuration>
tor-configuration make-tor-configuration
tor-configuration?
(tor tor-configuration-tor
(default tor))
(config-file tor-configuration-config-file)
(hidden-services tor-configuration-hidden-services
(default '())))
(define %tor-accounts
;; User account and groups for Tor.
(list (user-group (name "tor") (system? #t))
(user-account
(name "tor")
(group "tor")
(system? #t)
(comment "Tor daemon user")
(home-directory "/var/empty")
(shell #~(string-append #$shadow "/sbin/nologin")))))
(define-record-type <hidden-service>
(hidden-service name mapping)
hidden-service?
(name hidden-service-name) ;string
(mapping hidden-service-mapping)) ;list of port/address tuples
(define (tor-configuration->torrc config)
"Return a 'torrc' file for CONFIG."
(match config
(($ <tor-configuration> tor config-file services)
(computed-file
"torrc"
(with-imported-modules '((guix build utils))
#~(begin
(use-modules (guix build utils)
(ice-9 match))
(call-with-output-file #$output
(lambda (port)
(display "\
# The beginning was automatically added.
User tor
DataDirectory /var/lib/tor
Log notice syslog\n" port)
(for-each (match-lambda
((service (ports hosts) ...)
(format port "\
HiddenServiceDir /var/lib/tor/hidden-services/~a~%"
service)
(for-each (lambda (tcp-port host)
(format port "\
HiddenServicePort ~a ~a~%"
tcp-port host))
ports hosts)))
'#$(map (match-lambda
(($ <hidden-service> name mapping)
(cons name mapping)))
services))
;; Append the user's config file.
(call-with-input-file #$config-file
(lambda (input)
(dump-port input port)))
#t))))))))
(define (tor-shepherd-service config)
"Return a <shepherd-service> running TOR."
(match config
(($ <tor-configuration> tor)
(let ((torrc (tor-configuration->torrc config)))
(list (shepherd-service
(provision '(tor))
;; Tor needs at least one network interface to be up, hence the
;; dependency on 'loopback'.
(requirement '(user-processes loopback syslogd))
(start #~(make-forkexec-constructor
(list (string-append #$tor "/bin/tor") "-f" #$torrc)))
(stop #~(make-kill-destructor))
(documentation "Run the Tor anonymous network overlay.")))))))
(define (tor-hidden-service-activation config)
"Return the activation gexp for SERVICES, a list of hidden services."
#~(begin
(use-modules (guix build utils))
(define %user
(getpw "tor"))
(define (initialize service)
(let ((directory (string-append "/var/lib/tor/hidden-services/"
service)))
(mkdir-p directory)
(chown directory (passwd:uid %user) (passwd:gid %user))
;; The daemon bails out if we give wider permissions.
(chmod directory #o700)))
(mkdir-p "/var/lib/tor")
(chown "/var/lib/tor" (passwd:uid %user) (passwd:gid %user))
(chmod "/var/lib/tor" #o700)
(for-each initialize
'#$(map hidden-service-name
(tor-configuration-hidden-services config)))))
(define tor-service-type
(service-type (name 'tor)
(extensions
(list (service-extension shepherd-root-service-type
tor-shepherd-service)
(service-extension account-service-type
(const %tor-accounts))
(service-extension activation-service-type
tor-hidden-service-activation)))
;; This can be extended with hidden services.
(compose concatenate)
(extend (lambda (config services)
(tor-configuration
(inherit config)
(hidden-services
(append (tor-configuration-hidden-services config)
services)))))))
(define* (tor-service #:optional
(config-file (plain-file "empty" ""))
#:key (tor tor))
"Return a service to run the @uref{https://torproject.org, Tor} anonymous
networking daemon.
The daemon runs as the @code{tor} unprivileged user. It is passed
@var{config-file}, a file-like object, with an additional @code{User tor} line
and lines for hidden services added via @code{tor-hidden-service}. Run
@command{man tor} for information about the configuration file."
(service tor-service-type
(tor-configuration (tor tor)
(config-file config-file))))
(define tor-hidden-service-type
;; A type that extends Tor with hidden services.
(service-type (name 'tor-hidden-service)
(extensions
(list (service-extension tor-service-type list)))))
(define (tor-hidden-service name mapping)
"Define a new Tor @dfn{hidden service} called @var{name} and implementing
@var{mapping}. @var{mapping} is a list of port/host tuples, such as:
@example
'((22 \"127.0.0.1:22\")
(80 \"127.0.0.1:8080\"))
@end example
In this example, port 22 of the hidden service is mapped to local port 22, and
port 80 is mapped to local port 8080.
This creates a @file{/var/lib/tor/hidden-services/@var{name}} directory, where
the @file{hostname} file contains the @code{.onion} host name for the hidden
service.
See @uref{https://www.torproject.org/docs/tor-hidden-service.html.en, the Tor
project's documentation} for more information."
(service tor-hidden-service-type
(hidden-service name mapping)))
;;;
;;; BitlBee.
;;;
(define-record-type* <bitlbee-configuration>
bitlbee-configuration make-bitlbee-configuration
bitlbee-configuration?
(bitlbee bitlbee-configuration-bitlbee
(default bitlbee))
(interface bitlbee-configuration-interface)
(port bitlbee-configuration-port)
(extra-settings bitlbee-configuration-extra-settings))
(define bitlbee-shepherd-service
(match-lambda
(($ <bitlbee-configuration> bitlbee interface port extra-settings)
(let ((conf (plain-file "bitlbee.conf"
(string-append "
[settings]
User = bitlbee
ConfigDir = /var/lib/bitlbee
DaemonInterface = " interface "
DaemonPort = " (number->string port) "
" extra-settings))))
(list (shepherd-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 #$shadow "/sbin/nologin")))))
(define %bitlbee-activation
;; Activation gexp for BitlBee.
#~(begin
(use-modules (guix build utils))
;; This directory is used to store OTR data.
(mkdir-p "/var/lib/bitlbee")
(let ((user (getpwnam "bitlbee")))
(chown "/var/lib/bitlbee"
(passwd:uid user) (passwd:gid user)))))
(define bitlbee-service-type
(service-type (name 'bitlbee)
(extensions
(list (service-extension shepherd-root-service-type
bitlbee-shepherd-service)
(service-extension account-service-type
(const %bitlbee-accounts))
(service-extension activation-service-type
(const %bitlbee-activation))))))
(define* (bitlbee-service #:key (bitlbee bitlbee)
(interface "127.0.0.1") (port 6667)
(extra-settings ""))
"Return a service that runs @url{http://bitlbee.org,BitlBee}, a daemon that
acts as a gateway between IRC and chat networks.
The daemon will listen to the interface corresponding to the IP address
specified in @var{interface}, on @var{port}. @code{127.0.0.1} means that only
local clients can connect, whereas @code{0.0.0.0} means that connections can
come from any networking interface.
In addition, @var{extra-settings} specifies a string to append to the
configuration file."
(service bitlbee-service-type
(bitlbee-configuration
(bitlbee bitlbee)
(interface interface) (port port)
(extra-settings extra-settings))))
;;;
;;; Wicd.
;;;
(define %wicd-activation
;; Activation gexp for Wicd.
#~(begin
(use-modules (guix build utils))
(mkdir-p "/etc/wicd")
(let ((file-name "/etc/wicd/dhclient.conf.template.default"))
(unless (file-exists? file-name)
(copy-file (string-append #$wicd file-name)
file-name)))))
(define (wicd-shepherd-service wicd)
"Return a shepherd service for WICD."
(list (shepherd-service
(documentation "Run the Wicd network manager.")
(provision '(networking))
(requirement '(user-processes dbus-system loopback))
(start #~(make-forkexec-constructor
(list (string-append #$wicd "/sbin/wicd")
"--no-daemon")))
(stop #~(make-kill-destructor)))))
(define wicd-service-type
(service-type (name 'wicd)
(extensions
(list (service-extension shepherd-root-service-type
wicd-shepherd-service)
(service-extension dbus-root-service-type
list)
(service-extension activation-service-type
(const %wicd-activation))
;; Add Wicd to the global profile.
(service-extension profile-service-type list)))))
(define* (wicd-service #:key (wicd wicd))
"Return a service that runs @url{https://launchpad.net/wicd,Wicd}, a network
management daemon that aims to simplify wired and wireless networking.
This service adds the @var{wicd} package to the global profile, providing
several commands to interact with the daemon and configure networking:
@command{wicd-client}, a graphical user interface, and the @command{wicd-cli}
and @command{wicd-curses} user interfaces."
(service wicd-service-type wicd))
;;;
;;; NetworkManager
;;;
(define %network-manager-activation
;; Activation gexp for NetworkManager.
#~(begin
(use-modules (guix build utils))
(mkdir-p "/etc/NetworkManager/system-connections")))
(define (network-manager-shepherd-service network-manager)
"Return a shepherd service for NETWORK-MANAGER."
(list (shepherd-service
(documentation "Run the NetworkManager.")
(provision '(networking))
(requirement '(user-processes dbus-system loopback))
(start #~(make-forkexec-constructor
(list (string-append #$network-manager
"/sbin/NetworkManager")
"--no-daemon")))
(stop #~(make-kill-destructor)))))
(define network-manager-service-type
(service-type (name 'network-manager)
(extensions
(list (service-extension shepherd-root-service-type
network-manager-shepherd-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))
;;;
;;; Connman
;;;
(define %connman-activation
;; Activation gexp for Connman.
#~(begin
(use-modules (guix build utils))
(mkdir-p "/var/lib/connman/")
(mkdir-p "/var/lib/connman-vpn/")))
(define (connman-shepherd-service connman)
"Return a shepherd service for Connman"
(list (shepherd-service
(documentation "Run Connman")
(provision '(networking))
(requirement '(user-processes dbus-system loopback))
(start #~(make-forkexec-constructor
(list (string-append #$connman
"/sbin/connmand")
"-n" "-r")))
(stop #~(make-kill-destructor)))))
(define connman-service-type
(service-type (name 'connman)
(extensions
(list (service-extension shepherd-root-service-type
connman-shepherd-service)
(service-extension dbus-root-service-type list)
(service-extension activation-service-type
(const %connman-activation))
;; Add connman to the system profile.
(service-extension profile-service-type list)))))
(define* (connman-service #:key (connman connman))
"Return a service that runs @url{https://01.org/connman,Connman}, a network
connection manager.
This service adds the @var{connman} package to the global profile, providing
several the @command{connmanctl} command to interact with the daemon and
configure networking."
(service connman-service-type connman))
;;; networking.scm ends here