source: starbed_plugin/peer_setup.py @ 8fbef04

#!/usr/bin/python
import subprocess
import re
import os
import sys, getopt

class Peer:
        @staticmethod
        def getIP(interface):
                proc = subprocess.Popen(['ifconfig',interface],stdout=subprocess.PIPE)
                exit_code = os.waitpid(proc.pid, 0)
                result = proc.communicate()[0]
                m = re.search('inet addr:(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})',result)
                if not m:
                        raise LookupError('Interface does not exist or IP is not assigned!')
                else:
                        return m.group(1)
        @staticmethod
        def setIP(interface,ip):
                proc = subprocess.Popen(['ifconfig',interface,ip,"up"],stdout=subprocess.PIPE)
                exit_code = os.waitpid(proc.pid, 0)
        @staticmethod
        def setBridge(bridgename):
                proc = subprocess.Popen(['brctl', 'addbr',bridgename],stdout=subprocess.PIPE)
                exit_code = os.waitpid(proc.pid, 0)
        @staticmethod
        def addIfaceToBridge(iface,bridge):
                proc = subprocess.Popen(['brctl','addif',bridge,iface],stdout=subprocess.PIPE)
                exit_code = os.waitpid(proc.pid, 0)
        @staticmethod
        def delBridge(bridgename):
                proc = subprocess.Popen(['brctl', 'delbr',bridgename],stdout=subprocess.PIPE)
                exit_code = os.waitpid(proc.pid, 0)
        @staticmethod
        def ifUp(interface):
                proc = subprocess.Popen(['ifconfig',interface,"up"],stdout=subprocess.PIPE)
                exit_code = os.waitpid(proc.pid, 0)
        #add the port and make sure you increase the tunnel number!
        @staticmethod
        def tunnelConnect(dest,key,bridge,iface):
                print ['ssh','-o','Tunnel=ethernet','-f','-w','0:0','-p','22','-i',key,dest,'true']
                proc = subprocess.call(['ssh','-o','Tunnel=ethernet','-f','-w','0:0','-p','22','-i',key,dest,'true'])
                #Need to be fixed
                Peer.addIfaceToBridge('tap0',bridge)
                Peer.ifUp(iface)
                Peer.ifUp('tap0')
                Peer.ifUp(bridge)
try:
        opts, args = getopt.getopt(sys.argv[1:],"d:k:b:i:")
        dest = None
        key = None
        bridge = None
        interface = None
        for opt, arg in opts:
                if opt == '-d':
                        dest = arg
                elif opt == '-k':
                        key = arg
                elif opt == '-b':
                        bridge = arg
                elif opt == '-i':
                        interface = arg
        if not dest:
                print "Missing Arguemnts! destionation"
                sys.exit(2)
        if not key:
                print "Missing Arguemnts! key"
                sys.exit(2)
        if not bridge:
                print "Missing Arguemnts! bridge"
                sys.exit(2)
        if not interface:
                print "Missing Arguemnts! interface"
                sys.exit(2)

        Peer.tunnelConnect(dest,key,bridge,interface)
except getopt.GetoptError:
        #print "peer_setup.py -d=destination -k=key -b=bridge -i=interface"
        #sys.exit(2)
        pass