#!?/usr/bin/python
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Copyright?2013?Big?Switch?Networks?Inc.

Licensed?under?the?Apache?License?Version?2.0?（the?“License“）;?you?may
not?use?this?file?except?in?compliance?with?the?License.?You?may?obtain
a?copy?of?the?License?at

?????????http://www.apache.org/licenses/LICENSE-2.0

Unless?required?by?applicable?law?or?agreed?to?in?writing?software
distributed?under?the?License?is?distributed?on?an?“AS?IS“?BASIS?WITHOUT
WARRANTIES?OR?CONDITIONS?OF?ANY?KIND?either?express?or?implied.?See?the
License?for?the?specific?language?governing?permissions?and?limitations
under?the?License.

circuitpusher?utilizes?floodlight?rest?APIs?to?create?a?bidirectional?circuit?
i.e.?permanent?flow?entry?on?all?switches?in?route?between?two?devices?based?
on?IP?addresses?with?specified?priority.
?
Notes:
?1.?The?circuit?pusher?currently?only?creates?circuit?with?two?IP?end?points?
?2.?Prior?to?sending?restAPI?requests?to?the?circuit?pusher?the?specified?end
????points?must?already?been?known?to?the?controller?（i.e.?already?have?sent
????packets?on?the?network?easy?way?to?assure?this?is?to?do?a?ping?（to?any
????target）?from?the?two?hosts.
?3.?The?current?supported?command?syntax?format?is:
????a）?circuitpusher.py?--controller={IP}:{rest?port}?--type?ip?--src?{IP}?--dst?{IP}?--add?--name?{circuit-name}
?
???????adds?a?new?circuit?between?src?and?dst?devices?Currently?ip?circuit?is?supported.?ARP?is?automatically?supported.
????
???????Currently?a?simple?circuit?record?storage?is?provided?in?a?text?file?circuits.json?in?the?working?directory.
???????The?file?is?not?protected?and?does?not?clean?itself?between?controller?restarts.??The?file?is?needed?for?correct?operation
???????and?the?user?should?make?sure?deleting?the?file?when?floodlight?controller?is?restarted.

????b）?circuitpusher.py?--controller={IP}:{rest?port}?--delete?--name?{circuit-name}

???????deletes?a?created?circuit?（as?recorded?in?circuits.json）?using?the?previously?given?name

@author?kcwang
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import?os
import?sys
import?subprocess
import?json
import?argparse
import?io
import?time

#?parse?circuit?options.??Currently?supports?add?and?delete?actions.
#?Syntax:
#???circuitpusher?--controller?{IP:REST_PORT}?--add?--name?{CIRCUIT_NAME}?--type?ip?--src?{IP}?--dst?{IP}?
#???circuitpusher?--controller?{IP:REST_PORT}?--delete?--name?{CIRCUIT_NAME}

parser?=?argparse.ArgumentParser（description=‘Circuit?Pusher‘）
parser.add_argument（‘--controller‘?dest=‘controllerRestIp‘?action=‘store‘?default=‘localhost:8080‘?help=‘controller?IP:RESTport?e.g.?localhost:8080?or?A.B.C.D:8080‘）
parser.add_argument（‘--add‘?dest=‘action‘?action=‘store_const‘?const=‘add‘?default=‘add‘?help=‘action:?add?delete‘）
parser.add_argument（‘--delete‘?dest=‘action‘?action=‘store_const‘?const=‘delete‘?default=‘add‘?help=‘action:?add?delete‘）
parser.add_argument（‘--type‘?dest=‘type‘?action=‘store‘?default=‘ip‘?help=‘valid?types:?ip‘）
parser.add_argument（‘--src‘?dest=‘srcAddress‘?action=‘store‘?default=‘0.