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| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017, 2020 Ludovic Courtès <ludo@gnu.org>
;;;
;;; 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 (guix store ssh)
#:use-module (guix ssh)
#:use-module (web uri)
#:use-module (ssh session)
#:export (connect-to-daemon))
;;; Commentary:
;;;
;;; This modules provides the entry point for 'open-connection' in (guix
;;; store). Passing an 'ssh://' URI to 'open-connection' triggers the use of
;;; the code in this module.
;;;
;;; End:
(define (open-connection host port)
"Open a connection to HOST and PORT. Use the standard SSH port if PORT is
false."
(let* ((lst (getaddrinfo host
(if port (number->string port) "ssh")
(if port AI_NUMERICSERV 0)))
(addr (addrinfo:addr (car lst)))
(sock (socket (sockaddr:fam addr) SOCK_STREAM 0)))
;; Setting this option makes a dramatic difference because it avoids the
;; "ACK delay" on our RPC messages.
(setsockopt sock IPPROTO_TCP TCP_NODELAY 1)
(connect sock addr)
sock))
(define (connect-to-daemon uri)
"Connect to the SSH daemon at URI, a URI object with the 'ssh' scheme."
(remote-daemon-channel
(open-ssh-session (uri-host uri)
#:port (or (uri-port uri) 22)
#:user (uri-userinfo uri)
#:open-connection open-connection)))
;;; ssh.scm ends here
|