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|
;;; tunnel.scm -- Guile-SSH tunnel tests.
;; Copyright (C) 2015, 2016 Artyom V. Poptsov <poptsov.artyom@gmail.com>
;;
;; This file is a part of Guile-SSH.
;;
;; Guile-SSH 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.
;;
;; Guile-SSH 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 Guile-SSH. If not, see <http://www.gnu.org/licenses/>.
(add-to-load-path (getenv "abs_top_srcdir"))
(use-modules (srfi srfi-64)
(srfi srfi-26)
(ice-9 rdelim)
(ice-9 receive)
;; Helper procedures.
(tests common)
;; Guile-SSH
(ssh auth)
(ssh channel)
(ssh log)
(ssh session)
(ssh server)
(ssh tunnel))
(test-begin-with-log "tunnel")
;;;
(define %test-string "hello scheme world")
(define (call-with-connected-session/tunnel proc)
(call-with-connected-session
(lambda (session)
(authenticate-server session)
(userauth-none! session)
(proc session))))
(define (call-with-forward-channel session proc)
(let ((channel (make-channel session)))
(dynamic-wind
(const #f)
(lambda ()
(case (channel-open-forward channel
#:source-host "localhost"
#:local-port (get-unused-port)
#:remote-host "localhost"
#:remote-port (1+ (get-unused-port)))
((ok)
(proc channel))
(else => (cut error "Could not open forward" <>))))
(lambda () (close channel)))))
(test-equal-with-log "port forwarding, direct"
%test-string
(run-client-test
;; server
(lambda (server)
(start-server/dt-test server
(lambda (channel)
(write-line (read-line channel) channel))))
;; client
(lambda ()
(call-with-connected-session/tunnel
(lambda (session)
(call-with-forward-channel session
(lambda (channel)
(write-line %test-string channel)
(poll channel read-line))))))))
(test-error-with-log "port forwarding, direct, disconnected session"
(run-client-test
;; server
(lambda (server)
(start-server/dt-test server
(lambda (channel)
(write-line (read-line channel) channel))))
;; client
(lambda ()
(call-with-connected-session/tunnel
(lambda (session)
(disconnect! session)
(call-with-forward-channel session
(const #f)))))))
;; Create a tunnel, check the result.
(test-assert-with-log "make-tunnel"
(run-client-test
;; server
(lambda (server)
(start-server/dt-test server
(lambda (channel)
(write-line (read-line channel) channel))))
(lambda ()
(call-with-connected-session/tunnel
(lambda (session)
(let* ((local-port (get-unused-port))
(remote-host "www.example.org")
(tunnel (make-tunnel session
#:port local-port
#:host remote-host)))
(and (eq? (tunnel-session tunnel) session)
(string=? (tunnel-bind-address tunnel) "127.0.0.1")
(eq? (tunnel-port tunnel) local-port)
(eq? (tunnel-host-port tunnel) local-port)
(eq? (tunnel-host tunnel) remote-host)
(eq? (tunnel-reverse? tunnel) #f))))))))
;; Client calls 'call-with-ssh-forward' with a procedure which sends a string
;; to a server; server echoes the string back. Client checks if the sent
;; string and the result of 'call-with-ssh-forward' matches.
;;
;; Note that the main part of the test is done in "call/pf" process, only
;; comparison of the original string and the call result is done in the main
;; process of the test case. The reason for this is srfi-64 tests go bananas
;; when a thread is spawn in a test: the thread shares memory with the parent,
;; and it inherits the test environment, which in turn leads to errors.
;;
;; XXX: This test case contains operations that potentially can block it
;; forever.
;;
;; Here's a schematic representation of the test case:
;;
;; test
;; |
;; o Fork.
;; |___________________________________
;; o \ Fork.
;; |______________ |
;; | \ |
;; | | |
;; | | |
;; | call/pf server
;; | | |
;; | o | 'call-with-ssh-forward'
;; | |______________ |
;; | | \ |
;; | | "hello world" : |
;; | |-------------->: |
;; | | o | Re-send the message
;; | | :--->| to the server.
;; | | : o Echoing back.
;; | | :<---|
;; | | "hello world" o | Re-send the message
;; | |<--------------: | to the caller.
;; | | o | Stop the thread.
;; | o | Bind/listen a socket.
;; | "hello world" | |
;; |<--------------| |
;; o | | Check the result.
;; | | |
;;
(test-equal-with-log "call-with-ssh-forward"
%test-string
(run-client-test/separate-process
;; Server
(lambda (server)
(start-server/dt-test server
(lambda (channel)
(poll channel
(lambda (channel)
(write-line (read-line channel) channel)
(while #t (sleep 5)))))))
;; Client (call/pf)
(lambda ()
(set-log-userdata! (string-append (get-log-userdata) " (call/pf)"))
(call-with-connected-session/tunnel
(lambda (session)
(let* ((local-port (get-unused-port))
(remote-host "www.example.org")
(tunnel (make-tunnel session
#:port local-port
#:host remote-host)))
(call-with-ssh-forward tunnel
(lambda (sock)
(write-line %test-string sock)
(sleep 1)
(poll sock read-line)))))))
;; Handle the result.
(lambda (result)
result)))
(test-assert-with-log "channel-{listen,cancel}-forward"
(run-client-test
;; Server
(lambda (server)
(start-server/dist-test server))
;; Client
(lambda ()
(call-with-connected-session/tunnel
(lambda (session)
(let ((portnum (get-unused-port)))
(and
(receive (result pnum)
(channel-listen-forward session
#:address "localhost"
#:port portnum)
(and (equal? result 'ok)
(= pnum portnum)))
(eq? (channel-cancel-forward session "localhost" portnum) 'ok))))))))
(test-end "tunnel")
(exit (= (test-runner-fail-count (test-runner-current)) 0))
;;; tunnel.scm ends here.
|
