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ATM 网 络 协 议 实 现 源 代 码

This is a little sample configuration with two terminals connected to a
switch. All of the network elements are on the same host and atmtcp takes
care of the the real kernel with multiple terminals on the same machine.
At least not yet.)

Note that no data transfer or such is possible yet. This is only
signaling.


This is the example setup:

	  +-------+     +------+     +-------+
	  |  isp  |     |switch|     |  isp  |
	  |atmsigd|-----|      |-----|atmsigd|
	  +-------+     +------+     +-------+


Preparation (only once):

  # atmtcp virtual 1 listen-bg 8412
  # atmtcp virtual 2 connect localhost 8412 bg
  # atmtcp virtual 3 listen-bg 8434
  # atmtcp virtual 4 connect localhost 8434 bg
  # atmaddr -a 1 +123

Start the "network" (no privileges required):

  % atmsigd -b 1.0.105 /tmp/1
  % atmsigd -b -m switch 2.0.105 /tmp/2
  % atmsigd -b -m switch 3.0.105 /tmp/3
  % atmsigd -b 4.0.105 /tmp/4
  % ./sw_debug -d
  % isp /tmp/4 <4.isp
  % isp /tmp/1 <1.isp


In more detail:


		 +------------------------------------------+
                 |                ./sw_debug                |
		 +------------------------------------------+
		   |			                 |
		 /tmp/2			               /tmp/3
		   |			                 |
  +----------------------------------+ +----------------------------------+
  | atmsigd -m switch 2.0.105 /tmp/2 | | atmsigd -m switch 3.0.105 /tmp/3 |
  +----------------------------------+ +----------------------------------+
		   |			                 |
		 itf 2			                 |
	           |					 |
+--------------------------------------------+           |
| atmtcp virtual 2 connect localhost 8412 bg |           |
+--------------------------------------------+           |
|      atmtcp virtual 1 listen-bg 8412       |           |
+--------------------------------------------+         itf 3
	           |					 |
                 itf 1          +--------------------------------------------+
                   |            |      atmtcp virtual 3 listen-bg 8434       |
                   |            +--------------------------------------------+
                   |            | atmtcp virtual 4 connect localhost 8434 bg |
                   |            +--------------------------------------------+
	           |					 |
		   |				       itf 4
		   |					 |
       +------------------------+	     +------------------------+
       | atmsigd 1.0.105 /tmp/1 |	     | atmsigd 4.0.105 /tmp/4 |
       +------------------------+	     +------------------------+
              |						       |
	    /tmp/1					     /tmp/4
	      |						       |
+-------------------+					 +-------------------+
| isp /tmp/1 <1.isp |					 | isp /tmp/4 <4.isp |
+-------------------+					 +-------------------+


You can use the script "demo" to run this setup. You need to build the switch
library and the debug switch first:
  cd ..; make
  cd debug; make


--- switch.conf --------------------------------------------------------------

socket /tmp/2 {
    itf 2 2.0.5
    route +1
}
socket /tmp/3 {
    itf 3 2.0.5
    default
}

--- 1.isp --------------------------------------------------------------------

send connect vcc=1 svc=+234 local=+123 qos=ubr,aal5
receive okay vcc=1
send close vcc=1
receive close vcc=1

--- 4.isp --------------------------------------------------------------------

send listen vcc=1 svc=+234 qos=ubr,aal5
receive okay vcc=1
receive indicate listen_vcc=1
send accept vcc=2 listen_vcc=1
receive okay vcc=2
receive close vcc=2
send close vcc=2