[or-cvs] add in a brief cell structure diagram
Roger Dingledine
arma at seul.org
Sat Jan 31 07:36:41 UTC 2004
Update of /home/or/cvsroot/doc
In directory moria.mit.edu:/home2/arma/work/onion/cvs/doc
Modified Files:
tor-design.tex
Added Files:
cell-struct.fig cell-struct.pdf cell-struct.eps
Log Message:
add in a brief cell structure diagram
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Index: tor-design.tex
===================================================================
RCS file: /home/or/cvsroot/doc/tor-design.tex,v
retrieving revision 1.143
retrieving revision 1.144
diff -u -d -r1.143 -r1.144
--- tor-design.tex 31 Jan 2004 01:45:16 -0000 1.143
+++ tor-design.tex 31 Jan 2004 07:36:38 -0000 1.144
@@ -6,6 +6,7 @@
\usepackage{url}
\usepackage{graphics}
\usepackage{amsmath}
+\usepackage{epsfig}
\pagestyle{plain}
@@ -36,6 +37,12 @@
% \setlength{\topsep}{0mm}
}}{\end{list}}
+% Cut down on whitespace above and below figures displayed at head/foot of
+% page.
+\setlength{\textfloatsep}{3mm}
+% Cut down on whitespace above and below figures displayed in middle of page
+\setlength{\intextsep}{3mm}
+
\begin{document}
%% Use dvipdfm instead. --DH
@@ -168,8 +175,8 @@
Tor takes a simplified view toward distributing this
information. Certain more trusted nodes act as \emph{directory
servers}: they provide signed directories describing known
-routers and their current state. Users periodically download these
-directories via HTTP.
+routers and their current state. Users periodically download them
+via HTTP.
\textbf{Variable exit policies:} Tor provides a consistent mechanism
for each node to advertise a policy describing the hosts
@@ -595,9 +602,7 @@
The entire contents of the relay header and the relay cell payload
are encrypted or decrypted together as the relay cell moves along the
circuit, using the 128-bit AES cipher in counter mode to generate a
-cipher stream.
-The
-relay commands are: \emph{relay
+cipher stream. The relay commands are: \emph{relay
data} (for data flowing down the stream), \emph{relay begin} (to open a
stream), \emph{relay end} (to close a stream cleanly), \emph{relay
teardown} (to close a broken stream), \emph{relay connected}
@@ -607,7 +612,17 @@
(to tear down only part of the circuit, and to acknowledge), \emph{relay
sendme} (used for congestion control), and \emph{relay drop} (used to
implement long-range dummies).
-We describe each of these cell types and commands in more detail below.
+We give a visual overview of cell structure plus the details of relay
+cell structure, and then describe each of these cell types and commands
+in more detail below.
+
+\begin{figure}[h]
+\unitlength=1cm
+\centering
+\begin{picture}(8.0,1.5)
+\put(4,.5){\makebox(0,0)[c]{\epsfig{file=cell-struct,width=7cm}}}
+\end{picture}
+\end{figure}
\SubSection{Circuits and streams}
\label{subsec:circuits}
@@ -1816,7 +1831,7 @@
service from the DHT.
\item Alice chooses an OR as the rendezvous point (RP) for this
transaction. She builds a circuit to the RP, and gives it a
- rendezvous cookie that it will use to recognize Bob.
+ rendezvous cookie to recognize Bob.
\item Alice opens an anonymous stream to one of Bob's introduction
points, and gives it a message (encrypted to Bob's public key)
that tells him
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