bring docs closer to reality

svn:r221

1 files changed, 10 insertions, 10 deletions

diff --git a/doc/tor-spec.txt b/doc/tor-spec.txt
index 5698d4dfe..166df9999 100644
--- a/doc/tor-spec.txt
+++ b/doc/tor-spec.txt
@@ -163,7 +163,7 @@ which reveals the downstream node.
 
         First, the OP generates a pair of 8-byte symmetric keys (one
         [K_f] for the 'forward' stream from OP to OR, and one
-        [K_b] for the 'backward' stream from OR to OP.
+        [K_b] for the 'backward' stream from OR to OP).
 
         The OP generates a message [M] in the following format:
            Maximum bandwidth (bytes/s)      [4 bytes]
@@ -223,15 +223,15 @@ which reveals the downstream node.
 3. Cell Packet format
 
    The basic unit of communication for onion routers and onion
-   proxies is a fixed-width "Cell."  Each Cell contains the following
+   proxies is a fixed-width "cell".  Each cell contains the following
    fields:
 
         ACI (anonymous circuit identifier)    [2 bytes]
         Command                               [1 byte]
         Length                                [1 byte]
         Sequence number (unused, set to 0)    [4 bytes]
-        Payload (padded with 0 bytes)         [120 bytes]
-                                         [Total size: 128 bytes]
+        Payload (padded with 0 bytes)         [248 bytes]
+                                         [Total size: 256 bytes]
 
    The 'Command' field holds one of the following values:
          0 -- PADDING     (Padding)                 (See Sec 6.2)
@@ -242,10 +242,10 @@ which reveals the downstream node.
 
    The interpretation of 'Length' and 'Payload' depend on the type of
    the cell.
-      PADDING: Length is 0; Payload is 120 bytes of 0's. 
-      CREATE: Length is a value between 1 and 120; the first 'length'
+      PADDING: Length is 0; Payload is 248 bytes of 0's. 
+      CREATE: Length is a value between 1 and 248; the first 'length'
         bytes of payload contain a portion of an onion.
-      DATA: Length is a value between 4 and 120; the first 'length'
+      DATA: Length is a value between 4 and 248; the first 'length'
         bytes of payload contain useful data.
       DESTROY: Neither field is used.
       SENDME: Length encodes a window size, payload is unused.
@@ -335,10 +335,10 @@ which reveals the downstream node.
           side, then let the high bit of the ACI be 1, else 0.
 
        3. To send M over the wire, prepend a 4-byte integer containing
-          Len(M).  Call the result M'.  Let N=ceil(Len(M')/120).
+          Len(M).  Call the result M'.  Let N=ceil(Len(M')/248).
           Divide M' into N chunks, such that:
-             Chunk_I = M'[(I-1)*120:I*120]  for 1 <= I <= N-1
-             Chunk_N = M'[(N-1)*120:Len(M')]
+             Chunk_I = M'[(I-1)*248:I*248]  for 1 <= I <= N-1
+             Chunk_N = M'[(N-1)*248:Len(M')]
 
        4. Send N CREATE cells along the connection, setting the ACI
           on each to the selected ACI, setting the payload on each to