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bundling.scm
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;;;
;;; Copyright (C) 2006 M. Tuexen, [email protected]
;;;
;;; All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or
;;; without modification, are permitted provided that the
;;; following conditions are met:
;;; 1. Redistributions of source code must retain the above
;;; copyright notice, this list of conditions and the
;;; following disclaimer.
;;; 2. Redistributions in binary form must reproduce the
;;; above copyright notice, this list of conditions and
;;; the following disclaimer in the documentation and/or
;;; other materials provided with the distribution.
;;; 3. Neither the name of the project nor the names of
;;; its contributors may be used to endorse or promote
;;; products derived from this software without specific
;;; prior written permission.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS
;;; ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
;;; BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
;;; MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
;;; DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS
;;; BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
;;; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
;;; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
;;; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
;;; HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
;;; IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
;;; USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
;;; OF SUCH DAMAGE.
(define sut-addr (make-ipv4-address "172.29.96.100"))
(define sut-port 3868)
(define tester-addr (make-ipv4-address "172.29.96.4"))
(define tester-port 3868)
(use-modules (ice-9 syncase))
(define-syntax dotimes
(syntax-rules ()
((_ (var n res) . body)
(do ((limit n)
(var 0 (+ var 1)))
((>= var limit) res)
. body))
((_ (var n) . body)
(do ((limit n)
(var 0 (+ var 1)))
((>= var limit))
. body))))
(define (vector-find vector predicate)
(if (vector? vector)
(do ((index 0 (+ index 1)))
((or (= index (vector-length vector))
(predicate (vector-ref vector index)))
(if (= index (vector-length vector))
#f
(vector-ref vector index))))
#f))
(define (sctp-receive-chunk predicate)
(let* ((result (sctp-receive))
(chunks (cadr result)))
(if (vector-find chunks predicate)
result
(sctp-receive-chunk predicate))))
(define (associate peer-address peer-port)
(let ((local-port tester-port)
(local-tag (random (expt 2 32)))
(local-tsn (random (expt 2 32))))
(sctp-send (make-common-header local-port peer-port 0)
(vector (make-init-chunk local-tag 1500 1 1 local-tsn (if (equal? tester-addr-1 tester-addr-2)
(vector)
(vector (make-ipv4-address-parameter tester-addr-1)
(make-ipv4-address-parameter tester-addr-2)))))
peer-address)
(let* ((answer (sctp-receive-chunk init-ack-chunk?))
(init-ack (vector-ref (cadr answer) 0))
(parameters (get-parameters init-ack))
(state-cookie (vector-find parameters cookie-parameter?))
(peer-tag (get-initiate-tag init-ack))
(header (make-common-header local-port peer-port peer-tag)))
(sctp-send header
(vector (make-cookie-echo-chunk (get-cookie-parameter-cookie state-cookie)))
peer-address)
(sctp-receive-chunk cookie-ack-chunk?)
(list header local-tsn (get-initial-tsn init-ack)))))
(define (send-bundled-heartbeat-chunks number-of-chunks remote-address remote-port)
(sctp-reset sctp-local-udp-encaps-port)
(let* ((answer (associate remote-address remote-port))
(chunk (make-heartbeat-chunk (make-heartbeat-parameter (vector))))
(chunks (make-vector number-of-chunks))
(header (car answer)))
(dotimes (i number-of-chunks)
(vector-set! chunks i chunk))
(sctp-send header chunks remote-address)
(sleep 1)
(sctp-send header
(vector (make-abort-chunk #f))
remote-address)))
;;; (send-bundled-heartbeat-chunks 8 sut-addr sut-port)
(define (send-bundled-unknown-chunks number-of-chunks remote-address remote-port)
(sctp-reset sctp-local-udp-encaps-port)
(let* ((answer (associate remote-address remote-port))
(chunk (make-chunk #xf7 0 (vector)))
(chunks (make-vector number-of-chunks))
(header (car answer)))
(dotimes (i number-of-chunks)
(vector-set! chunks i chunk))
(sctp-send header chunks remote-address)
(sleep 1)
(sctp-send header
(vector (make-abort-chunk #f))
remote-address)))
;;;(send-bundled-unknown-chunks 8000 sut-addr sut-port)
(define (send-bundled-shutdown-ack-chunks number-of-chunks local-address local-port remote-address remote-port)
(sctp-reset sctp-local-udp-encaps-port)
(let* ((header (make-common-header local-port remote-port 1))
(chunk (make-shutdown-ack-chunk))
(chunks (make-vector number-of-chunks)))
(dotimes (i number-of-chunks)
(vector-set! chunks i chunk))
(sctp-send header chunks remote-address local-address)))
;;;(send-bundled-shutdown-ack-chunks 1000 tester-addr tester-port sut-addr sut-port)