Revision: 502
http://vde.svn.sourceforge.net/vde/?rev=502&view=rev
Author: danielel
Date: 2011-06-18 10:58:22 +0000 (Sat, 18 Jun 2011)
Log Message:
-----------
wirefilter manual updated, describing the new features.
Modified Paths:
--------------
branches/danielinux-wirefilter2/man/wirefilter.1
Modified: branches/danielinux-wirefilter2/man/wirefilter.1
===================================================================
--- branches/danielinux-wirefilter2/man/wirefilter.1 2011-06-18 09:47:21 UTC
(rev 501)
+++ branches/danielinux-wirefilter2/man/wirefilter.1 2011-06-18 10:58:22 UTC
(rev 502)
@@ -81,18 +81,45 @@
use suffixes K,M,G to abbreviate 2^10, 2^20, 2^30.
128K means 128KBytes/sec. 128+64K means 64i to 196KBytes/sec.
Sender is not prevented from sending packets, delivery is delayed to limit the
bandwidth
-to the desired value. (Like a bottleneck along the path)
+to the desired value. (Like a bottleneck along the path). The management of
the queue depends
+on -c, -A and -R parameters (see below).
U and N after the values (e.g. 128+64KN) set the statistic distribution to
-use (uniform or normal).
+use (uniform or normal).
+In order to use bits instead of Bytes, 'b' can be appended to the
+value, so 64Kb means 64 kilobit per seconds. Please note that one Kbit=1000
bit, while
+one KByte=1024 Bytes.
.TP
-.B \-s "\fIspeed\fP"
-Interface speed in Bytes/sec. It has the same syntax of -b. Input is blocked
for
-the tramission time of the packet, thus the sender is prevented from sending
too fast.
-.TP
+
.B \-c "\fIchannel_bufsize\fP"
Channel buffer size (in Bytes): maximum size of the packet queue. Exceeding
packets
-are discarded.
+are discarded in a drop-tail policy.
.TP
+.B \-R "\fIrmin,rmax,probability,limit\fP"
+For packet waiting in the queue due to a bandwidth restriction, use Random
Early Detection
+policy for queue management. Parameters are the following:
+.sp
+.in +4n
+.nf
+\fImin\fP: Average queue size at which marking becomes a possibility.
+\fImax\fP: At this average queue size, the marking probability is maximal.
+\fIprobability\fP: Maximum probability for marking, specified as a floating
point number from 0.0 to 1.0.
+\fIlimit\fP: Hard limit on queue size in bytes. Further packets are dropped.
+.fi
+.in
+.sp
+For more information about the algorithm see
+\fBtc-red\fP(8).
+.TP
+.B \-A
+When used with
+.B -c
+instead of discarding packets in drop-tail,
+mangle TCP acknowledgements in the opposite direction of the current flow,
+so the advertised window field in the TCP options is zeroed, thus preventing
+the TCP endpoint to inject new segments into the network. Works only on frames
+containing TCP/IPv4 valid segments carrying the ACK flag.
+.TP
+
.B \-n "\fInoise factor\fP"
Number of bits damaged/one megabyte.
.TP
@@ -216,6 +243,7 @@
\fBvdeq\fP(1).
\fBdpipe\fP(1).
\fBunixterm\fP(1).
+\fBtc-red\fP(8).
.br
.SH AUTHOR
VDE is a project by Renzo Davoli <re...@cs.unibo.it>
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