lens
lens for “live of “
lens is a that you to tap live for and .
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Watch the video of our here!
& are in the docs/ .
Or, of the we can be found here.
You can reach us , or our are in our (Zach, Eric).
A cable can be -down into the lens tap board in two any wires. The tap board the a path a set of . Once all of the wires have been down, in two , they can be cut so that the are now the on the tap board.
One or two NICs are to the tap board on its TAP ports. These, along with a USB link, are to a . The can the over USB to a or tap , or a pass- mode.
The tap board has three : fail-safe power loss, , and . If the board that power has been lost, it can use the in a large to the state of the to pass- mode. , if the board fails to a from the a of time,such as if thelive on tap 1,it can the .live on tap 1, the board has an on it that can if the board is or moved and that to the . This can give you peace of mind that your board is still in-place and .
The lens was made to work with the tap board, but can be used it. two NICs in a man-in-the- .
lens a stack for man-in-the- . It is able to many , edit their data , and forge new the that look as to the ones as .
lens is – and uses I/O . Many are as .
The is split into , each of which its own state and an for the above it. These the “OSI Model.” For , , IPv4, TCP,HTTPlive on tap 1|mmattice/lens: Tap live cabling for insp, are some of the we have.
State &
Some are with to the data that is them (e.g. TCP),do not any state to their data (e.g. IPv4).live on tap 1, these may find it to state in order to later forge .
are as of . are to form a – DAG ( a tree), where each layer knows its () and its () that come “above” it in the stack. For , an of may have an in its list. That ‘s would be a back to the .
For the of this , this kind of will be as --> ,even the is in fact -endedxuân bắc live stream, and the are .
Each layer ( ) the as :
This is there is new data () for the layer to . is a dict which holds all of the from all of the . With and , it be to the . src where the data came from. A might move some data from into and call Layer.(src, ,) to pass data to .
This is to write out . A write would take inrosé live, re- them, and them with to form a new . It would then call Layer.(dst, , ) to pass the back to the layer.
This a this layer is of the given . The , if not , is to True, that is, all data.
, src and dst which NIC the came from or is to go to. two , route(src) and (dst), which are to the of a . This might need to be re- for with 3+ NICs. , the two NICs are by 0 and 1,so the are .
each the abovelive on tap 1, there are some / that are :
This will to a using this layer’s . It will go the list of until it finds one whose match(…) True. It will then call that child’s (…) . If no child , it calls self.write(dst, …), dst from src, at which point the flow ” “.
This is used to pass data on to for . If no layer is or it will re-write () the data .
This calls self..write(dst, , ). It is for a using this layer’s . It can be of as the of Layer.(…).
This will call self.(dst, …) with dst from src.
