services: Make 'static-networking' extensible.
This allows users to statically define several interfaces. * gnu/services/networking.scm (<static-networking>)[provision] [name-servers]: Add default values. (static-networking-shepherd-service) (static-networking-etc-files) (static-networking-shepherd-services): New procedures. (static-networking-service-type): Change to extend both SHEPHERD-ROOT-SERVICE-TYPE and ETC-SERVICE-TYPE. (static-networking-service): Remove default value of #:provision. Implement using 'simple-service'. * gnu/services/base.scm (%base-services): Replace 'static-networking-service' call with 'service' form. * doc/guix.texi (Networking Services): Update documentation.
This commit is contained in:
Ludovic Courtès
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@ -8786,11 +8786,21 @@ 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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@end deffn
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@defvr {Scheme Variable} static-networking-service-type
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This is the type for statically-configured network interfaces.
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@c TODO Document <static-networking> data structures.
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@end defvr
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@deffn {Scheme Procedure} static-networking-service @var{interface} @var{ip} @
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[#:netmask #f] [#:gateway #f] [#:name-servers @code{'()}]
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Return a service that starts @var{interface} with address @var{ip}. If
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@var{netmask} is true, use it as the network mask. If @var{gateway} is true,
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it must be a string specifying the default network gateway.
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This procedure can be called several times, one for each network
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interface of interest. Behind the scenes what it does is extend
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@code{static-networking-service-type} with additional network interfaces
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to handle.
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@end deffn
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@cindex wicd
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@ -1546,8 +1546,10 @@ This service is not part of @var{%base-services}."
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(mingetty-service (mingetty-configuration
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(tty "tty6")))
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(static-networking-service "lo" "127.0.0.1"
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#:provision '(loopback))
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(service static-networking-service-type
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(list (static-networking (interface "lo")
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(ip "127.0.0.1")
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(provision '(loopback)))))
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(syslog-service)
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(urandom-seed-service)
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(guix-service)
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@ -42,6 +42,13 @@
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#:use-module (ice-9 match)
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#:export (%facebook-host-aliases
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static-networking
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static-networking?
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static-networking-interface
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static-networking-ip
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static-networking-netmask
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static-networking-gateway
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static-networking-service
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static-networking-service-type
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dhcp-client-service
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@ -121,88 +128,138 @@ fe80::1%lo0 apps.facebook.com\n")
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(ip static-networking-ip)
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(netmask static-networking-netmask
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(default #f))
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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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(gateway static-networking-gateway ;FIXME: doesn't belong here
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(default #f))
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(provision static-networking-provision
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(default #f))
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(name-servers static-networking-name-servers ;FIXME: doesn't belong here
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(default '())))
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(define static-networking-shepherd-service
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(match-lambda
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(($ <static-networking> interface ip netmask gateway provision
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name-servers)
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(let ((loopback? (and provision (memq 'loopback provision))))
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(shepherd-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 (or provision
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(list (symbol-append 'networking-
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(string->symbol interface)))))
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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 #$ip))
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(sockaddr (make-socket-address AF_INET addr 0))
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(mask (and #$netmask
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(inet-pton AF_INET #$netmask)))
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(maskaddr (and mask
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(make-socket-address AF_INET
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mask 0)))
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(gateway (and #$gateway
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(inet-pton AF_INET #$gateway)))
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(gatewayaddr (and gateway
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(make-socket-address AF_INET
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gateway 0))))
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(configure-network-interface #$interface sockaddr
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(logior IFF_UP
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#$(if loopback?
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#~IFF_LOOPBACK
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0))
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#:netmask maskaddr)
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(when gateway
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(let ((sock (socket AF_INET SOCK_DGRAM 0)))
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(add-network-route/gateway sock gatewayaddr)
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(close-port sock))))))
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(stop #~(lambda _
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;; Return #f is successfully stopped.
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(let ((sock (socket AF_INET SOCK_STREAM 0)))
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(when #$gateway
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(delete-network-route sock
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(make-socket-address
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AF_INET INADDR_ANY 0)))
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(set-network-interface-flags sock #$interface 0)
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(close-port sock)
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#f)))
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(respawn? #f))))))
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(define (static-networking-etc-files interfaces)
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"Return a /etc/resolv.conf entry for INTERFACES or the empty list."
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(match (delete-duplicates
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(append-map static-networking-name-servers
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interfaces))
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(()
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'())
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((name-servers ...)
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(let ((content (string-join
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(map (cut string-append "nameserver " <>)
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name-servers)
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"\n" 'suffix)))
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`(("resolv.conf"
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,(plain-file "resolv.conf"
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(string-append "\
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# Generated by 'static-networking-service'.\n"
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content))))))))
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(define (static-networking-shepherd-services interfaces)
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"Return the list of Shepherd services to bring up INTERFACES, a list of
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<static-networking> objects."
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(define (loopback? service)
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(memq 'loopback (shepherd-service-provision service)))
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(let ((services (map static-networking-shepherd-service interfaces)))
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(match (remove loopback? services)
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(()
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;; There's no interface other than 'loopback', so we assume that the
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;; 'networking' service will be provided by dhclient or similar.
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services)
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((non-loopback ...)
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;; Assume we're providing all the interfaces, and thus, provide a
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;; 'networking' service.
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(cons (shepherd-service
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(provision '(networking))
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(requirement (append-map shepherd-service-provision
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services))
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(start #~(const #t))
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(stop #~(const #f))
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(documentation "Bring up all the networking interfaces."))
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services)))))
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(define static-networking-service-type
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(shepherd-service-type
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'static-networking
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(match-lambda
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(($ <static-networking> interface ip netmask gateway provision
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name-servers)
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(let ((loopback? (memq 'loopback provision)))
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(shepherd-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 #$ip))
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(sockaddr (make-socket-address AF_INET addr 0))
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(mask (and #$netmask
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(inet-pton AF_INET #$netmask)))
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(maskaddr (and mask
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(make-socket-address AF_INET
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mask 0)))
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(gateway (and #$gateway
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(inet-pton AF_INET #$gateway)))
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(gatewayaddr (and gateway
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(make-socket-address AF_INET
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gateway 0))))
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(configure-network-interface #$interface sockaddr
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(logior IFF_UP
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#$(if loopback?
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#~IFF_LOOPBACK
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0))
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#:netmask maskaddr)
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(when gateway
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(let ((sock (socket AF_INET SOCK_DGRAM 0)))
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(add-network-route/gateway sock gatewayaddr)
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(close-port sock))))
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#$(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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'#$name-servers)
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#t))
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#t)))
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(stop #~(lambda _
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;; Return #f is successfully stopped.
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(let ((sock (socket AF_INET SOCK_STREAM 0)))
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(when #$gateway
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(delete-network-route sock
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(make-socket-address
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AF_INET INADDR_ANY 0)))
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(set-network-interface-flags sock #$interface 0)
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(close-port sock)
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#f)))
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(respawn? #f)))))))
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;; The service type for statically-defined network interfaces.
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(service-type (name 'static-networking)
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(extensions
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(list
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(service-extension shepherd-root-service-type
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static-networking-shepherd-services)
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(service-extension etc-service-type
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static-networking-etc-files)))
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(compose concatenate)
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(extend append)))
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(define* (static-networking-service interface ip
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#:key
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netmask gateway
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(provision '(networking))
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netmask gateway provision
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(name-servers '()))
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"Return a service that starts @var{interface} with address @var{ip}. If
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@var{netmask} is true, use it as the network mask. If @var{gateway} is true,
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it must be a string specifying the default network gateway."
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(service static-networking-service-type
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(static-networking (interface interface) (ip ip)
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(netmask netmask) (gateway gateway)
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(provision provision)
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(name-servers name-servers))))
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it must be a string specifying the default network gateway.
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This procedure can be called several times, one for each network
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interface of interest. Behind the scenes what it does is extend
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@code{static-networking-service-type} with additional network interfaces
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to handle."
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(simple-service 'static-network-interface
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static-networking-service-type
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(list (static-networking (interface interface) (ip ip)
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(netmask netmask) (gateway gateway)
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(provision provision)
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(name-servers name-servers)))))
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(define dhcp-client-service-type
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(shepherd-service-type
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