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#!/usr/bin/env python
# Copyright 2018, LabN Consulting, L.L.C.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; see the file COPYING; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# want_rd_routes = [
# {'rd':'10:1', 'p':'5.1.0.0/24', 'n':'1.1.1.1'},
# {'rd':'10:1', 'p':'5.1.0.0/24', 'n':'1.1.1.1'},
#
# {'rd':'10:3', 'p':'5.1.0.0/24', 'n':'3.3.3.3'},
# ]
#
# ribRequireVpnRoutes('r2','Customer routes',want_rd_routes)
#
# want_unicast_routes = [
# {'p':'5.1.0.0/24', 'n':'1.1.1.1'},
# ]
#
# ribRequireUnicastRoutes('r1','ipv4','r1-cust1','Customer routes in vrf',want_unicast_routes)
# ribRequireUnicastRoutes('r1','ipv4','','Customer routes in default',want_unicast_routes)
#
from lutil import luCommand,luResult
import json
import re
# gpz: get rib in json form and compare against desired routes
class BgpRib:
def routes_include_wanted(self,pfxtbl,want,debug):
# helper function to RequireVpnRoutes
for pfx in pfxtbl.iterkeys():
if debug:
print 'trying pfx ' + pfx
if pfx != want['p']:
if debug:
print 'want pfx=' + want['p'] + ', not ' + pfx
continue
if debug:
print 'have pfx=' + pfx
for r in pfxtbl[pfx]:
if debug:
print 'trying route'
nexthops = r['nexthops']
for nh in nexthops:
if debug:
print 'trying nh ' + nh['ip']
if nh['ip'] == want['n']:
if debug:
print 'found ' + want['n']
return 1
else:
if debug:
print 'want nh=' + want['n'] + ', not ' + nh['ip']
if debug:
print 'missing route: pfx=' + want['p'] + ', nh=' + want['n']
return 0
def RequireVpnRoutes(self, target, title, wantroutes, debug=0):
import json
logstr = "RequireVpnRoutes " + str(wantroutes)
#non json form for humans
luCommand(target,'vtysh -c "show bgp ipv4 vpn"','.','None','Get VPN RIB (non-json)')
ret = luCommand(target,'vtysh -c "show bgp ipv4 vpn json"','.*','None','Get VPN RIB (json)')
if re.search(r'^\s*$', ret):
# degenerate case: empty json means no routes
if len(wantroutes) > 0:
luResult(target, False, title, logstr)
return
luResult(target, True, title, logstr)
rib = json.loads(ret)
rds = rib['routes']['routeDistinguishers']
for want in wantroutes:
found = 0
if debug:
print "want rd " + want['rd']
for rd in rds.iterkeys():
if rd != want['rd']:
continue
if debug:
print "found rd " + rd
table = rds[rd]
if self.routes_include_wanted(table,want,debug):
found = 1
break
if not found:
luResult(target, False, title, logstr)
return
luResult(target, True, title, logstr)
def RequireUnicastRoutes(self,target,afi,vrf,title,wantroutes,debug=0):
logstr = "RequireVpnRoutes " + str(wantroutes)
vrfstr = ''
if vrf != '':
vrfstr = 'vrf %s' % (vrf)
if (afi != 'ipv4') and (afi != 'ipv6'):
print "ERROR invalid afi";
cmdstr = 'show bgp %s %s unicast' % (vrfstr, afi)
#non json form for humans
cmd = 'vtysh -c "%s"' % cmdstr
luCommand(target,cmd,'.','None','Get %s %s RIB (non-json)' % (vrfstr, afi))
cmd = 'vtysh -c "%s json"' % cmdstr
ret = luCommand(target,cmd,'.*','None','Get %s %s RIB (json)' % (vrfstr, afi))
if re.search(r'^\s*$', ret):
# degenerate case: empty json means no routes
if len(wantroutes) > 0:
luResult(target, False, title, logstr)
return
luResult(target, True, title, logstr)
rib = json.loads(ret)
try:
table = rib['routes']
# KeyError: 'routes' probably means missing/bad VRF
except KeyError as err:
if vrf != '':
errstr = '-script ERROR: check if wrong vrf (%s)' % (vrf)
else:
errstr = '-script ERROR: check if vrf missing'
luResult(target, False, title + errstr, logstr)
return
for want in wantroutes:
if not self.routes_include_wanted(table,want,debug):
luResult(target, False, title, logstr)
return
luResult(target, True, title, logstr)
BgpRib=BgpRib()
def bgpribRequireVpnRoutes(target, title, wantroutes, debug=0):
BgpRib.RequireVpnRoutes(target, title, wantroutes, debug)
def bgpribRequireUnicastRoutes(target, afi, vrf, title, wantroutes, debug=0):
BgpRib.RequireUnicastRoutes(target, afi, vrf, title, wantroutes, debug)
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