84 lines
2.2 KiB
Python
84 lines
2.2 KiB
Python
'''
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The functions in this file interact with the VPP API to retrieve certain
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interface metadata.
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'''
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from vpp_papi import VPPApiClient
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import os
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import fnmatch
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import logging
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class NullHandler(logging.Handler):
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def emit(self, record):
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pass
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class VPPApi():
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def __init__(self, address='/run/vpp/api.sock', clientname='vppapi-client'):
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self.address = address
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self.connected = False
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self.logger = logging.getLogger('agentx.vppapi')
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self.logger.addHandler(NullHandler())
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self.clientname = clientname
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self.vpp = None
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def connect(self):
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if self.connected:
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return True
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vpp_json_dir = '/usr/share/vpp/api/'
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# construct a list of all the json api files
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jsonfiles = []
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for root, dirnames, filenames in os.walk(vpp_json_dir):
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for filename in fnmatch.filter(filenames, '*.api.json'):
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jsonfiles.append(os.path.join(root, filename))
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if not jsonfiles:
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self.logger.error('no json api files found')
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return False
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self.vpp = VPPApiClient(apifiles=jsonfiles,
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server_address=self.address)
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try:
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self.logger.info('Connecting to VPP')
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self.vpp.connect(self.clientname)
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except:
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return False
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v = self.vpp.api.show_version()
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self.logger.info('VPP version is %s' % v.version)
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self.connected = True
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return True
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def disconnect(self):
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if not self.connected:
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return True
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self.vpp.disconnect()
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self.connected = False
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return True
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def get_ifaces(self):
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ret = {}
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if not self.connected:
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return ret
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try:
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iface_list = self.vpp.api.sw_interface_dump()
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except Exception as e:
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self.logger.error("VPP communication error, disconnecting", e)
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self.vpp.disconnect()
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self.connected = False
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return ret
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if not iface_list:
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self.logger.error("Can't get interface list")
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return ret
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for iface in iface_list:
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ret[iface.interface_name] = iface
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return ret
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