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updated ames doc

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Ubuntu 2014-08-27 22:30:42 +00:00
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main/pub/src/doc/ref/vol/4/a.md
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@ -51,8 +51,8 @@ someone else? The reason is that there are potentially multiple ships on the
same pier, and the kernel can send a message from any of them. If you attempt
to send a message from a ship not on your pier, then ames will refuse to send
it. If you hack around in your own copy of ames to go ahead and send it
anyway, then the other ship will reject it because your key is bad. Basically,
only send messages from yourself.
anyway, then the other ship will reject it because your key is bad. Only send
messages from yourself.
The `q` is a path, representing the place on the other side that you want to
receive your message. It is approximately equivalent to a port number.
@ -362,13 +362,13 @@ mechanism from `++skin`, which may be a 0, 1, 2, or 3, and put it in `tay`.
Next, we concatenate together, bit by bit, some final metadata. We use three
bits for our protocol number, which is incremented modulo eight when there is a
continuity breach or the protocol changes. We use the final twenty bits of a
hash of the body for error-checking. We use two bits to tell how much room is
used in the body for the sending ship, and another two bits for the receiving
ship. Finally, we use five bits to store the encryption type. Note that since
there are only two bits worth of encryption types, there are three unused bits
here. This adds up to 32 bits of header data. Finally, we concatenate this
onto the front of the packet. Thus, we can summarize the packet header format
as follows.
hash of the body (which, we suppose, makes it a twenty bit hash) for
error-checking. We use two bits to tell how much room is used in the body for
the sending ship, and another two bits for the receiving ship. Finally, we use
five bits to store the encryption type. Note that since there are only two
bits worth of encryption types, there are three unused bits here. This adds up
to 32 bits of header data. Finally, we concatenate this onto the front of the
packet. Thus, we can summarize the packet header format as follows.
```
0 1 2 3
@ -1037,11 +1037,10 @@ complicated.
==
```
Basically, we're dispatching messages based on the prefix of their path. Since
only `%gall` apps use end-to-end acknowledgments at the moment, every path must
have at least two elements, and the first one must be `%q`. Beyond that, we
handle the `/q/ge` and `/q/gh` cases for gall requests and responses,
respectively.
We're dispatching messages based on the prefix of their path. Since only
`%gall` apps use end-to-end acknowledgments at the moment, every path must have
at least two elements, and the first one must be `%q`. Beyond that, we handle
the `/q/ge` and `/q/gh` cases for gall requests and responses, respectively.
In both cases, we require the next term in the path to be the name of the
intended recipient `%gall` app. Thus, a message to `/q/ge/chat` for example,