+++ /dev/null
-__author__ = 'Administrator'\r
-\r
-import urllib2\r
-import logging\r
-from mininet.node import OVSSwitch\r
-import ast\r
-logging.basicConfig(level=logging.INFO)\r
-\r
-"""\r
-class to read openflow stats from the Ryu controller of the DCNEtwork\r
-"""\r
-\r
-class DCNetworkMonitor():\r
- def __init__(self, net):\r
- self.net = net\r
- # link to REST_API\r
- self.ip = '0.0.0.0'\r
- self.port = '8080'\r
- self.REST_api = 'http://{0}:{1}'.format(self.ip,self.port)\r
-\r
-\r
- def get_rate(self, vnf_name, direction='tx'):\r
- try:\r
- vnf_switch = self.net.DCNetwork_graph.neighbors(str(vnf_name))\r
-\r
- if len(vnf_switch) > 1:\r
- logging.info("vnf: {0} has multiple ports".format(vnf_name))\r
- return\r
- elif len(vnf_switch) == 0:\r
- logging.info("vnf: {0} is not connected".format(vnf_name))\r
- return\r
- else:\r
- vnf_switch = vnf_switch[0]\r
- next_node = self.net.getNodeByName(vnf_switch)\r
-\r
- if not isinstance( next_node, OVSSwitch ):\r
- logging.info("vnf: {0} is not connected to switch".format(vnf_name))\r
- return\r
-\r
- mon_port = self.net.DCNetwork_graph[vnf_name][vnf_switch]['dst_port']\r
- switch_dpid = x = int(str(next_node.dpid),16)\r
-\r
- ret = self.REST_cmd('stats/port', switch_dpid)\r
- port_stat_dict = ast.literal_eval(ret)\r
- for port_stat in port_stat_dict[str(switch_dpid)]:\r
- if port_stat['port_no'] == mon_port:\r
- return port_stat\r
- break\r
-\r
- return ret\r
-\r
- except Exception as ex:\r
- logging.exception("get_txrate error.")\r
- return ex.message\r
-\r
-\r
-\r
- def REST_cmd(self, prefix, dpid):\r
- url = self.REST_api + '/' + str(prefix) + '/' + str(dpid)\r
- req = urllib2.Request(url)\r
- ret = urllib2.urlopen(req).read()\r
- return ret
\ No newline at end of file