Re: netgraph TTY

From: Maksim Yevmenkin (maksim.yevmenkin_at_savvis.net)
Date: 03/31/05

  • Next message: Jerry Toung: "Re: netgraph TTY" 
    Date: Wed, 30 Mar 2005 19:21:04 -0800
To: Jerry Toung <jtoung@arc.nasa.gov>

    Jerry Toung wrote:

    > Hey Max,
    > all I can say is thank you. That's a very nice tutorial. I am sure other
    > people will benefit.

    so, did i get job at nasa? :)

    btw, i did miss one command (naming one2many node) while
    cut-and-paste'ing this from my screen, i.e.

    >>+ mkpeer tee: one2many left2right many0
    >>+ connect tee: tee:left2right right2left many1

    + name tee:left2right one2many

    >>+ show one2many:

    thanks,
    max

    > Take care my friend.
    > Jerry
    >
    > On Wednesday 30 March 2005 05:22 pm, Maksim Yevmenkin wrote:
    >
    >>Jerry,
    >>
    >>draw a picture :) it really helps :) for example
    >>
    >> right2left left2right
    >> \ /
    >>[ksocket] ------- [tee] -------- [hole]
    >> left right
    >>
    >># ngctl
    >>
    >>+ mkpeer hole hook hook -- create ng_hole node
    >>+ name hook hole -- name ng_hole node
    >>
    >>
    >>+ mkpeer hole: tee right right -- create ng_tee node and connect to hole
    >>+ name hole:right tee -- name ng_tee node
    >>
    >>
    >>+ mkpeer tee: ksocket left local/stream/0 -- create ksocket node and
    >>connect to tee
    >>+ name tee:left ksocket -- name ksocket node
    >>+ msg ksocket: bind local/"/tmp/foo" -- bind ksocket
    >>
    >>
    >>+ show tee:
    >> Name: tee Type: tee ID: 00000011 Num hooks: 2
    >> Local hook Peer name Peer type Peer ID Peer
    >>hook
    >> ---------- --------- --------- -------
    >>---------
    >> left ksocket ksocket 00000012
    >>local/stream/0
    >> right hole hole 00000010 right
    >>
    >>
    >>
    >>+ show ksocket:
    >> Name: ksocket Type: ksocket ID: 00000012 Num hooks: 1
    >> Local hook Peer name Peer type Peer ID Peer
    >>hook
    >> ---------- --------- --------- -------
    >>---------
    >> local/stream/0 tee tee 00000011 left
    >>
    >>
    >>
    >>+ show hole:
    >> Name: hole Type: hole ID: 00000010 Num hooks: 2
    >> Local hook Peer name Peer type Peer ID Peer
    >>hook
    >> ---------- --------- --------- -------
    >>---------
    >> right tee tee 00000011 right
    >>
    >> hook ngctl8529 socket 0000000f hook
    >>
    >>
    >>
    >>now connect nghook(8) to "tee:left2right" (or you could connect ng_tty
    >>node there), then connect to the unix socket at "/tmp/foo" and send
    >>something to the socket. you should see output. since we have ng_hole on
    >>the "right" then "right2left" will never get any data. if you need to
    >>capture traffic from from "right2left" then you will need to connect
    >>"one2many" node to both "right2left" (to "one2many:many0") and
    >>"right2left" (to "one2name:many1") and then connect your tty node to the
    >>"one2many:one" hook
    >>
    >>like so
    >>
    >>+ mkpeer tee: one2many left2right many0
    >>+ connect tee: tee:left2right right2left many1
    >>+ show one2many:
    >> Name: one2many Type: one2many ID: 00000014 Num hooks: 2
    >> Local hook Peer name Peer type Peer ID Peer
    >>hook
    >> ---------- --------- --------- -------
    >>---------
    >> many1 tee tee 00000011
    >>right2left
    >> many0 tee tee 00000011
    >>left2right
    >>
    >>
    >>+ show tee:
    >> Name: tee Type: tee ID: 00000011 Num hooks: 4
    >> Local hook Peer name Peer type Peer ID Peer
    >>hook
    >> ---------- --------- --------- -------
    >>---------
    >> right2left one2many one2many 00000014 many1
    >>
    >> left2right one2many one2many 00000014 many0
    >>
    >> left ksocket ksocket 00000012
    >>local/stream/0
    >> right hole hole 00000010 right
    >>
    >>
    >>
    >>hope this helps :)
    >>
    >>max

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