+#!/usr/bin/env python
+
+import sys
+import netaddr
+
+__author__ = "Sandeep Gangadharan"
+__copyright__ = "(c) Copyright [2015] Hewlett-Packard \
+ Development Company, L.P."
+__license__ = "Eclipse Public License "
+__email__ = "sandeep.gangadharan@hp.com"
+__created__ = "19 March 2014"
+
+"""
+ create_fullymesh.py:
+ Description : Creates Fully mesh mininet topology.
+ Input : switch_count, host count per switch, base mac address,
+ base ip address
+ Output : switch.py (A python topology file)
+ Note : This is a fully mesh network. Not available in
+ mininet by default. Hence generating a python file
+ dynamically which represents the topology.
+
+"""
+
+if len(sys.argv) < 5:
+ print("Please povide correct inputs. Exiting!!!")
+ print "{0} <switch_count> <host_per_switch> <base_mac: Eg:00:4b:00:00:00:00 > \
+ <base_ip: Eg:75.75.0.0>".format(sys.argv[0].split('/')[-1])
+ print "Dpid of switches is derived from base mac and \
+ host ip address is derived from base ip"
+ sys.exit(1)
+
+switch_count = int(sys.argv[1])
+host_per_switch = int(sys.argv[2])
+base_mac = sys.argv[3]
+base_host_ip = sys.argv[4]
+
+base_host_mac = base_mac.split(':')
+base_host_mac[0] = '10'
+base_host_mac = (':').join(base_host_mac)
+dpid_mac = base_mac.split(':')
+dpid_mac = ('').join(dpid_mac)
+
+
+def new_mac(mac, offset):
+ """
+ Description: This function increments an existing mac address by offset
+ and returns the new mac
+ :param mac: Mac address with each hex separated by a colon
+ (Eg: 00:01:02:03:04:05
+ :param offset: Increment the mac to this offset value
+ :return: new mac in same format as input mac.
+ """
+ mac = netaddr.EUI(mac).value
+ mac = mac + offset
+ mac = str(netaddr.EUI(mac)).replace('-', ':')
+ return mac
+
+
+def new_ip(ip, offset):
+ """
+ Description: This function increments an existing ip address by offset
+ and returns the new ip
+ :param ip: Ipv4 address string
+ :param offset: increment value of IP
+ :rtype : new Ipv4 address string after incrementing by offset
+ """
+ ip = netaddr.IPAddress(ip)
+ return ip.__add__(offset)
+
+
+def new_dpid(mac, offset):
+ """
+ Description: This function is for returns a new dpid by
+ incrementing a mac address by offset value.
+ :param mac: mac address separated by colon
+ :param offset: increment value
+ :return: New dpid
+ """
+ mac = netaddr.EUI(mac).value
+ mac = mac + offset
+ mac = str(netaddr.EUI(mac)).replace('-', ':')
+ dpid_mac = mac.split(':')
+ dpid_mac = ('').join(dpid_mac)
+ DPID = "0000" + dpid_mac
+ return DPID
+
+
+if __name__ == "__main__":
+ DPID = new_dpid(base_mac, 1)
+ HMAC = new_mac(base_host_mac, 1)
+ HIP = new_ip(base_host_ip, 1)
+ prefix = 8
+ configfile = open("switch.py", 'w')
+ configfile.write('\"\"\"@author: sandeep gangadharan\n \
+ This topology has {0:d} switches {1:d} hosts \
+ \nThis topology is made out of {2:s} script \
+ \nThis is a fully mesh topology. Not available in mininet by default.\
+ \nHence generating this python file dynamically\"\"\" \
+ \nfrom mininet.topo import Topo\nclass DemoTopo(Topo): \
+ \n'.format(switch_count, switch_count * host_per_switch, sys.argv[0]))
+ print "This topology has %d switches %d hosts" \
+ % (switch_count, switch_count * host_per_switch)
+ configfile.write(" def __init__(self):\n ")
+ configfile.write(" # Initialize topology\n")
+ configfile.write(" Topo.__init__(self)\n")
+ configfile.write(" # Add Switches\n")
+ # Add switches
+ for i in range(1, switch_count + 1):
+ configfile.write(" s{0:d} = self.addSwitch(\'s{1:d}\',dpid=\'{2:s}\')\
+ \n".format(i, i, DPID))
+ DPID = new_dpid(base_mac, i + 1)
+
+ # Add hosts
+ configfile.write(" # Add Hosts\n")
+ for i in range(1, switch_count + 1):
+ for j in range(1, host_per_switch + 1):
+ configfile.write(" self.addLink(s{0:d}, \
+ self.addHost('s{1:d}h{2:d}',\
+ ip='{3:s}',mac='{4:s}',prefixLen='{5:d}'))\n"
+ .format(i, i, j, HIP, HMAC, prefix))
+ HMAC = new_mac(HMAC, 1)
+ HIP = new_ip(HIP, 1)
+
+ # Add Links
+ configfile.write(" # Add Links\n")
+ count = 0
+ for i in range(1, switch_count + 1):
+ if i == 1:
+ continue
+ for j in range(1, i + 1):
+ if i != j:
+ configfile.write(" self.addLink(s{0:d}, s{1:d})\
+ \n".format(i, j))
+ configfile.write("topos = { 'demotopo': ( lambda: DemoTopo() ) }")
+ configfile.close()