From owner-freebsd-hackers Tue Sep 3 04:11:49 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id EAA23180 for hackers-outgoing; Tue, 3 Sep 1996 04:11:49 -0700 (PDT) Received: from labinfo.iet.unipi.it (labinfo.iet.unipi.it [131.114.9.5]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id EAA23168 for ; Tue, 3 Sep 1996 04:11:37 -0700 (PDT) Received: from localhost (luigi@localhost) by labinfo.iet.unipi.it (8.6.5/8.6.5) id MAA07164 for hackers@freebsd.org; Tue, 3 Sep 1996 12:44:31 +0200 From: Luigi Rizzo Message-Id: <199609031044.MAA07164@labinfo.iet.unipi.it> Subject: A simulation environment... To: hackers@freebsd.org Date: Tue, 3 Sep 1996 12:44:30 +0200 (MET DST) X-Mailer: ELM [version 2.4 PL23] Content-Type: text Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk For those of you interested in networkin protocols: I am pleased to announce the availability of "dummynet", a simple environment for the evaluation of network protocols on a single system using real traffic generators (e.g. FTP, WWW servers, etc.) and still accounting for limited-size queues, bandwidth limitations and communication delays. Dummynet requires minimal modifications to the OS (300 lines of kernel code, intercepting calls to ip_output() and tcp_input() in the case of a TCP version) and does not interfere with ordinary system activities (I use it on my own workstation). A report and source code for FreeBSD (easily portable to other BSD-derived systems) are available from http://www.iet.unipi.it/~luigi/research.html Feedback and suggestions are appreciated. Luigi ==================================================================== Luigi Rizzo Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it Universita' di Pisa tel: +39-50-568533 via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 http://www.iet.unipi.it/~luigi/ ====================================================================