# Copyright (C) 2016 Nippon Telegraph and Telephone Corporation.

#

# 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.

"""

Usage example

1. Run this application:

$ ryu-manager --observe-links ospf.switch_13.py

2. Switch struct

please see ryu/topology/switches.py

msg struct:

{'dpid': '0000000000000001',

'ports': [

{'dpid': '0000000000000001',

'hw_addr': 'b6:b8:0b:3f:e5:86',

'name': 's1-eth1',

'port_no': '00000001'},

{'dpid': '0000000000000001',

'hw_addr': '2e:fa:67:bd:f3:b2',

'name': 's1-eth2',

'port_no': '00000002'}

]

}

2. Link struct

please see ryu/topology/switches.py

note: two node will get two link.

eg: s1--s2 will get link: s1 -> s2 and link: s2->s1

msg struct

{

'dst': {'port_no': '00000001',

'name': 's2-eth1',

'hw_addr': '52:9c:f6:6d:d3:5f',

'dpid': '0000000000000002'},

'src': {'port_no': '00000001',

'name': 's1-eth1',

'hw_addr': '22:33:5a:65:de:62',

'dpid': '0000000000000001'}

}

3. Topology change is notified:

< {"params": [{"ports": [{"hw_addr": "56:c7:08:12:bb:36", "name": "s1-eth1", "port_no": "00000001", "dpid": "0000000000000001"}, {"hw_addr": "de:b9:49:24:74:3f", "name": "s1-eth2", "port_no": "00000002", "dpid": "0000000000000001"}], "dpid": "0000000000000001"}], "jsonrpc": "2.0", "method": "event_switch_enter", "id": 1}

> {"id": 1, "jsonrpc": "2.0", "result": ""}

< {"params": [{"ports": [{"hw_addr": "56:c7:08:12:bb:36", "name": "s1-eth1", "port_no": "00000001", "dpid": "0000000000000001"}, {"hw_addr": "de:b9:49:24:74:3f", "name": "s1-eth2", "port_no": "00000002", "dpid": "0000000000000001"}], "dpid": "0000000000000001"}], "jsonrpc": "2.0", "method": "event_switch_leave", "id": 2}

> {"id": 2, "jsonrpc": "2.0", "result": ""}

...

"""

from operator import attrgetter

import topo_switch_13

from ryu.controller import ofp_event

from ryu.controller.handler import MAIN_DISPATCHER, DEAD_DISPATCHER,CONFIG_DISPATCHER

from ryu.controller.handler import set_ev_cls

from ryu.lib import hub

from collections import defaultdict

from ryu.topology import event

from ryu.topology.api import get_switch,get_link,get_all_host,get_host

from ryu.topology.switches import Switches

from ryu.lib.packet import packet

from ryu.lib.packet import ethernet

from ryu.lib.packet import ether_types

import algorithms

from ryu.lib.packet import arp

from ryu.lib.packet import ipv6,dhcp,ipv4,udp

from ryu.lib import mac

from ryu.lib import addrconv

from ryu.lib.dpid import dpid_to_str, str_to_dpid

ARP = arp.arp.__name__

ETHERNET = ethernet.ethernet.__name__

ETHERNET_MULTICAST = "ff:ff:ff:ff:ff:ff"

class OSPFswitch_13(topo_switch_13.TopoSwitch_13):

# datapath.send_msg(req)