483 lines
18 KiB
Python
483 lines
18 KiB
Python
#
|
|
# Copyright (c) 2022 Pim van Pelt
|
|
#
|
|
# 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.
|
|
#
|
|
import logging
|
|
import validator.bondethernet as bondethernet
|
|
import validator.bridgedomain as bridgedomain
|
|
import validator.lcp as lcp
|
|
import validator.address as address
|
|
|
|
class NullHandler(logging.Handler):
|
|
def emit(self, record):
|
|
pass
|
|
|
|
def get_parent_by_name(yaml, ifname):
|
|
""" Returns the sub-interface's parent, or None if the sub-int doesn't exist. """
|
|
if not '.' in ifname:
|
|
return None
|
|
try:
|
|
ifname, subid = ifname.split('.')
|
|
subid = int(subid)
|
|
iface = yaml['interfaces'][ifname]
|
|
return iface
|
|
except:
|
|
pass
|
|
return None
|
|
|
|
|
|
def get_by_name(yaml, ifname):
|
|
""" Returns the interface or sub-interface by a given name, or None if it does not exist """
|
|
if '.' in ifname:
|
|
try:
|
|
ifname, subid = ifname.split('.')
|
|
subid = int(subid)
|
|
iface = yaml['interfaces'][ifname]['sub-interfaces'][subid]
|
|
return iface
|
|
except:
|
|
return None
|
|
|
|
try:
|
|
iface = yaml['interfaces'][ifname]
|
|
return iface
|
|
except:
|
|
pass
|
|
return None
|
|
|
|
|
|
def is_sub(yaml, ifname):
|
|
""" Returns True if this interface is a sub-interface """
|
|
parent_iface = get_parent_by_name(yaml, ifname)
|
|
return isinstance(parent_iface, dict)
|
|
|
|
|
|
def has_sub(yaml, ifname):
|
|
""" Returns True if this interface has sub-interfaces """
|
|
if not 'interfaces' in yaml:
|
|
return False
|
|
|
|
if ifname in yaml['interfaces']:
|
|
iface = yaml['interfaces'][ifname]
|
|
if 'sub-interfaces' in iface and len(iface['sub-interfaces']) > 0:
|
|
return True
|
|
return False
|
|
|
|
|
|
def has_address(yaml, ifname):
|
|
""" Returns True if this interface or sub-interface has one or more addresses"""
|
|
|
|
iface = get_by_name(yaml, ifname)
|
|
if not iface:
|
|
return False
|
|
return 'addresses' in iface
|
|
|
|
|
|
def get_l2xc_interfaces(yaml):
|
|
""" Returns a list of all interfaces that have an L2 CrossConnect """
|
|
ret = []
|
|
if not 'interfaces' in yaml:
|
|
return ret
|
|
for ifname, iface in yaml['interfaces'].items():
|
|
if 'l2xc' in iface:
|
|
ret.append(ifname)
|
|
if 'sub-interfaces' in iface:
|
|
for sub_ifname, sub_iface in iface['sub-interfaces'].items():
|
|
if 'l2xc' in sub_iface:
|
|
ret.append(sub_ifname)
|
|
|
|
return ret
|
|
|
|
|
|
def is_l2xc_interface(yaml, ifname):
|
|
""" Returns True if this interface has an L2 CrossConnect """
|
|
|
|
return ifname in get_l2xc_interfaces(yaml)
|
|
|
|
|
|
def get_l2xc_target_interfaces(yaml):
|
|
""" Returns a list of all interfaces that are the target of an L2 CrossConnect """
|
|
ret = []
|
|
if 'interfaces' in yaml:
|
|
for ifname, iface in yaml['interfaces'].items():
|
|
if 'l2xc' in iface:
|
|
ret.append(iface['l2xc'])
|
|
if 'sub-interfaces' in iface:
|
|
for sub_ifname, sub_iface in iface['sub-interfaces'].items():
|
|
if 'l2xc' in sub_iface:
|
|
ret.append(sub_iface['l2xc'])
|
|
|
|
return ret
|
|
|
|
|
|
def is_l2xc_target_interface(yaml, ifname):
|
|
""" Returns True if this interface is the target of an L2 CrossConnect """
|
|
|
|
return ifname in get_l2xc_target_interfaces(yaml)
|
|
|
|
|
|
def is_l2xc_target_interface_unique(yaml, ifname):
|
|
""" Returns True if this interface is referenced as an l2xc target zero or one times """
|
|
|
|
ifs = get_l2xc_target_interfaces(yaml)
|
|
return ifs.count(ifname) < 2
|
|
|
|
|
|
def has_lcp(yaml, ifname):
|
|
""" Returns True if this interface or sub-interface has an LCP """
|
|
|
|
iface = get_by_name(yaml, ifname)
|
|
if not iface:
|
|
return False
|
|
return 'lcp' in iface
|
|
|
|
|
|
def valid_encapsulation(yaml, ifname):
|
|
""" Returns True if the sub interface has a valid encapsulation, or
|
|
none at all """
|
|
iface = get_by_name(yaml, ifname)
|
|
if not 'encapsulation' in iface:
|
|
return True
|
|
|
|
encap = iface['encapsulation']
|
|
if 'dot1ad' in encap and 'dot1q' in encap:
|
|
return False
|
|
if 'inner-dot1q' in encap and not ('dot1ad' in encap or 'dot1q' in encap):
|
|
return False
|
|
if 'exact-match' in encap and encap['exact-match'] == False and has_lcp(yaml, ifname):
|
|
return False
|
|
|
|
return True
|
|
|
|
|
|
def get_encapsulation(yaml, ifname):
|
|
""" Returns the encapsulation of an interface name as a fully formed dictionary:
|
|
|
|
dot1q: int (default 0)
|
|
dot1ad: int (default 0)
|
|
inner-dot1q: int (default 0)
|
|
exact-match: bool (default False)
|
|
|
|
If the interface is not a sub-int with valid encapsulation, None is returned.
|
|
"""
|
|
if not valid_encapsulation(yaml, ifname):
|
|
return None
|
|
|
|
iface = get_by_name(yaml, ifname)
|
|
parent_iface = get_parent_by_name(yaml, ifname)
|
|
if not iface or not parent_iface:
|
|
return None
|
|
parent_ifname, subid = ifname.split('.')
|
|
|
|
dot1q = 0
|
|
dot1ad = 0
|
|
inner_dot1q = 0
|
|
exact_match = False
|
|
if not 'encapsulation' in iface:
|
|
dot1q = int(subid)
|
|
else:
|
|
if 'dot1q' in iface['encapsulation']:
|
|
dot1q = iface['encapsulation']['dot1q']
|
|
elif 'dot1ad' in iface['encapsulation']:
|
|
dot1ad = iface['encapsulation']['dot1ad']
|
|
if 'inner-dot1q' in iface['encapsulation']:
|
|
inner_dot1q = iface['encapsulation']['inner-dot1q']
|
|
if 'exact-match' in iface['encapsulation']:
|
|
exact_match = iface['encapsulation']['exact-match']
|
|
|
|
return {
|
|
"dot1q": int(dot1q),
|
|
"dot1ad": int(dot1ad),
|
|
"inner-dot1q": int(inner_dot1q),
|
|
"exact-match": bool(exact_match)
|
|
}
|
|
|
|
|
|
def get_interfaces(yaml):
|
|
""" Return a list of all interface and sub-interface names """
|
|
ret = []
|
|
if not 'interfaces' in yaml:
|
|
return ret
|
|
for ifname, iface in yaml['interfaces'].items():
|
|
ret.append(ifname)
|
|
if not 'sub-interfaces' in iface:
|
|
continue
|
|
for subid, sub_iface in iface['sub-interfaces'].items():
|
|
ret.append("%s.%d" % (ifname, subid))
|
|
return ret
|
|
|
|
|
|
def get_sub_interfaces(yaml):
|
|
""" Return all interfaces which are a subinterface. """
|
|
ret = []
|
|
for ifname in get_interfaces(yaml):
|
|
if is_sub(yaml, ifname):
|
|
ret.append(ifname)
|
|
return ret
|
|
|
|
def get_qinx_interfaces(yaml):
|
|
""" Return all interfaces which are double-tagged, either QinAD or QinQ.
|
|
These interfaces will always have a valid encapsulation with 'inner-dot1q'
|
|
set to non-zero.
|
|
|
|
Note: this is always a strict subset of get_sub_interfaces()
|
|
"""
|
|
ret = []
|
|
for ifname in get_interfaces(yaml):
|
|
if not is_sub(yaml, ifname):
|
|
continue
|
|
encap = get_encapsulation(yaml, ifname)
|
|
if not encap:
|
|
continue
|
|
if encap['inner-dot1q'] > 0:
|
|
ret.append(ifname)
|
|
return ret
|
|
|
|
|
|
def is_qinx(yaml, ifname):
|
|
""" Returns True if the interface is a double-tagged (QinQ or QinAD) interface """
|
|
return ifname in get_qinx_interfaces(yaml)
|
|
|
|
|
|
def unique_encapsulation(yaml, sub_ifname):
|
|
""" Ensures that for the sub_ifname specified, there exist no other sub-ints on the
|
|
parent with the same encapsulation. """
|
|
iface = get_by_name(yaml, sub_ifname)
|
|
parent_iface = get_parent_by_name(yaml, sub_ifname)
|
|
if not iface or not parent_iface:
|
|
return False
|
|
parent_ifname, subid = sub_ifname.split('.')
|
|
|
|
sub_encap = get_encapsulation(yaml, sub_ifname)
|
|
if not sub_encap:
|
|
return False
|
|
|
|
ncount = 0
|
|
for subid, sibling_iface in parent_iface['sub-interfaces'].items():
|
|
sibling_ifname = "%s.%d" % (parent_ifname, subid)
|
|
sibling_encap = get_encapsulation(yaml, sibling_ifname)
|
|
if sub_encap == sibling_encap and sub_ifname != sibling_ifname:
|
|
## print("%s overlaps with %s" % (sub_encap, sibling_encap))
|
|
ncount = ncount + 1
|
|
|
|
return ncount == 0
|
|
|
|
|
|
def is_l2(yaml, ifname):
|
|
""" Returns True if the interface is an L2XC target or a member of a bridgedomain """
|
|
if bridgedomain.is_bridge_interface(yaml, ifname):
|
|
return True
|
|
if is_l2xc_target_interface(yaml, ifname):
|
|
return True
|
|
return False
|
|
|
|
|
|
def is_l3(yaml, ifname):
|
|
""" Returns True if the interface exists and is neither l2xc target nor bridgedomain """
|
|
return not is_l2(yaml, ifname)
|
|
|
|
|
|
def get_lcp(yaml, ifname):
|
|
""" Returns the LCP of the interface. If the interface is a sub-interface with L3
|
|
enabled, synthesize it based on its parent, using smart QinQ syntax.
|
|
Return None if no LCP can be found. """
|
|
|
|
iface = get_by_name(yaml, ifname)
|
|
parent_iface = get_parent_by_name(yaml, ifname)
|
|
if 'lcp' in iface:
|
|
return iface['lcp']
|
|
if is_l2(yaml, ifname):
|
|
return None
|
|
if parent_iface and not 'lcp' in parent_iface:
|
|
return None
|
|
if not 'encapsulation' in iface:
|
|
if not '.' in ifname:
|
|
## Not a sub-int and no encap? Should not happen
|
|
return None
|
|
ifname, subid = ifname.split('.')
|
|
subid = int(subid)
|
|
return "%s.%d" % (parent_iface['lcp'], subid)
|
|
|
|
dot1q = 0
|
|
dot1ad = 0
|
|
inner_dot1q = 0
|
|
if 'dot1q' in iface['encapsulation']:
|
|
dot1q = iface['encapsulation']['dot1q']
|
|
elif 'dot1ad' in iface['encapsulation']:
|
|
dot1ad = iface['encapsulation']['dot1ad']
|
|
if 'inner-dot1q' in iface['encapsulation']:
|
|
inner_dot1q = iface['encapsulation']['inner-dot1q']
|
|
if inner_dot1q and dot1ad:
|
|
lcp = "%s.%d.%d" % (parent_iface['lcp'], dot1ad, inner_dot1q)
|
|
elif inner_dot1q and dot1q:
|
|
lcp = "%s.%d.%d" % (parent_iface['lcp'], dot1q, inner_dot1q)
|
|
elif dot1ad:
|
|
lcp = "%s.%d" % (parent_iface['lcp'], dot1ad)
|
|
elif dot1q:
|
|
lcp = "%s.%d" % (parent_iface['lcp'], dot1q)
|
|
else:
|
|
return None
|
|
return lcp
|
|
|
|
def get_mtu(yaml, ifname):
|
|
""" Returns MTU of the interface. If it's not set, return the parent's MTU, and
|
|
return 1500 if no MTU was set on the sub-int or the parent."""
|
|
iface = get_by_name(yaml, ifname)
|
|
parent_iface = get_parent_by_name(yaml, ifname)
|
|
|
|
try:
|
|
return iface['mtu']
|
|
return parent_iface['mtu']
|
|
except:
|
|
pass
|
|
return 1500
|
|
|
|
|
|
def validate_interfaces(yaml):
|
|
result = True
|
|
msgs = []
|
|
logger = logging.getLogger('vppcfg.validator')
|
|
logger.addHandler(NullHandler())
|
|
|
|
if not 'interfaces' in yaml:
|
|
return result, msgs
|
|
|
|
for ifname, iface in yaml['interfaces'].items():
|
|
logger.debug("interface %s" % iface)
|
|
if ifname.startswith("BondEthernet") and not bondethernet.get_by_name(yaml, ifname):
|
|
msgs.append("interface %s does not exist in bondethernets" % ifname)
|
|
result = False
|
|
|
|
iface_mtu = get_mtu(yaml, ifname)
|
|
iface_lcp = has_lcp(yaml, ifname)
|
|
iface_address = has_address(yaml, ifname)
|
|
|
|
if iface_address and not iface_lcp:
|
|
msgs.append("interface %s has an address but no LCP" % ifname)
|
|
result = False
|
|
iface_lcp = get_lcp(yaml, ifname)
|
|
if iface_lcp and not lcp.is_unique(yaml, iface_lcp):
|
|
msgs.append("interface %s does not have a unique LCP name %s" % (ifname, iface_lcp))
|
|
result = False
|
|
if iface_lcp and len(iface_lcp)>15:
|
|
msgs.append("interface %s has LCP with too long name %s" % (fname, iface_lcp))
|
|
result = False
|
|
|
|
if 'addresses' in iface:
|
|
for a in iface['addresses']:
|
|
if not address.is_allowed(yaml, ifname, iface['addresses'], a):
|
|
msgs.append("interface %s IP address %s conflicts with another" % (ifname, a))
|
|
result = False
|
|
if 'l2xc' in iface:
|
|
if has_sub(yaml, ifname):
|
|
msgs.append("interface %s has l2xc so it cannot have sub-interfaces" % (ifname))
|
|
result = False
|
|
if iface_lcp:
|
|
msgs.append("interface %s has l2xc so it cannot be an LCP" % (ifname))
|
|
result = False
|
|
if iface_address:
|
|
msgs.append("interface %s has l2xc so it cannot have an address" % (ifname))
|
|
result = False
|
|
if not get_by_name(yaml, iface['l2xc']):
|
|
msgs.append("interface %s l2xc target %s does not exist" % (ifname, iface['l2xc']))
|
|
result = False
|
|
if iface['l2xc'] == ifname:
|
|
msgs.append("interface %s l2xc target cannot be itself" % (ifname))
|
|
result = False
|
|
target_mtu = get_mtu(yaml, iface['l2xc'])
|
|
if target_mtu != iface_mtu:
|
|
msgs.append("interface %s l2xc target MTU %d does not match source MTU %d" % (ifname, target_mtu, iface_mtu))
|
|
result = False
|
|
if not is_l2xc_target_interface_unique(yaml, iface['l2xc']):
|
|
msgs.append("interface %s l2xc target %s is not unique" % (ifname, iface['l2xc']))
|
|
result = False
|
|
if bridgedomain.is_bridge_interface(yaml, iface['l2xc']):
|
|
msgs.append("interface %s l2xc target %s is in a bridgedomain" % (ifname, iface['l2xc']))
|
|
result = False
|
|
if has_lcp(yaml, iface['l2xc']):
|
|
msgs.append("interface %s l2xc target %s cannot be an LCP" % (ifname, iface['l2xc']))
|
|
result = False
|
|
if has_address(yaml, iface['l2xc']):
|
|
msgs.append("interface %s l2xc target %s cannot have an address" % (ifname, iface['l2xc']))
|
|
result = False
|
|
|
|
if has_sub(yaml, ifname):
|
|
for sub_id, sub_iface in yaml['interfaces'][ifname]['sub-interfaces'].items():
|
|
logger.debug("sub-interface %s" % sub_iface)
|
|
sub_ifname = "%s.%d" % (ifname, sub_id)
|
|
if not sub_iface:
|
|
msgs.append("sub-interface %s has no config" % (sub_ifname))
|
|
result = False
|
|
continue
|
|
|
|
sub_lcp = get_lcp(yaml, sub_ifname)
|
|
if sub_lcp and len(sub_lcp)>15:
|
|
msgs.append("sub-interface %s has LCP with too long name %s" % (sub_ifname, sub_lcp))
|
|
result = False
|
|
if sub_lcp and not lcp.is_unique(yaml, sub_lcp):
|
|
msgs.append("sub-interface %s does not have a unique LCP name %s" % (sub_ifname, sub_lcp))
|
|
result = False
|
|
sub_mtu = get_mtu(yaml, sub_ifname)
|
|
if sub_mtu > iface_mtu:
|
|
msgs.append("sub-interface %s has MTU %d higher than parent MTU %d" % (sub_ifname, sub_iface['mtu'], iface_mtu))
|
|
result = False
|
|
if has_lcp(yaml, sub_ifname):
|
|
if not iface_lcp:
|
|
msgs.append("sub-interface %s has LCP but %s does not have LCP" % (sub_ifname, ifname))
|
|
result = False
|
|
if has_address(yaml, sub_ifname):
|
|
## The sub_iface lcp is not required: it can be derived from the iface_lcp, which has to be set
|
|
if not iface_lcp:
|
|
msgs.append("sub-interface %s has an address but %s does not have LCP" % (sub_ifname, ifname))
|
|
result = False
|
|
for a in sub_iface['addresses']:
|
|
if not address.is_allowed(yaml, sub_ifname, sub_iface['addresses'], a):
|
|
msgs.append("sub-interface %s IP address %s conflicts with another" % (sub_ifname, a))
|
|
result = False
|
|
if not valid_encapsulation(yaml, sub_ifname):
|
|
msgs.append("sub-interface %s has invalid encapsulation" % (sub_ifname))
|
|
result = False
|
|
elif not unique_encapsulation(yaml, sub_ifname):
|
|
msgs.append("sub-interface %s does not have unique encapsulation" % (sub_ifname))
|
|
result = False
|
|
if 'l2xc' in sub_iface:
|
|
if has_lcp(yaml, sub_ifname):
|
|
msgs.append("sub-interface %s has l2xc so it cannot be an LCP" % (sub_ifname))
|
|
result = False
|
|
if has_address(yaml, sub_ifname):
|
|
msgs.append("sub-interface %s has l2xc so it cannot have an address" % (sub_ifname))
|
|
result = False
|
|
if not get_by_name(yaml, sub_iface['l2xc']):
|
|
msgs.append("sub-interface %s l2xc target %s does not exist" % (sub_ifname, sub_iface['l2xc']))
|
|
result = False
|
|
if sub_iface['l2xc'] == sub_ifname:
|
|
msgs.append("sub-interface %s l2xc target cannot be itself" % (sub_ifname))
|
|
result = False
|
|
target_mtu = get_mtu(yaml, sub_iface['l2xc'])
|
|
if target_mtu != sub_mtu:
|
|
msgs.append("sub-interface %s l2xc target MTU %d does not match source MTU %d" % (ifname, target_mtu, sub_mtu))
|
|
result = False
|
|
if not is_l2xc_target_interface_unique(yaml, sub_iface['l2xc']):
|
|
msgs.append("sub-interface %s l2xc target %s is not unique" % (sub_ifname, sub_iface['l2xc']))
|
|
result = False
|
|
if bridgedomain.is_bridge_interface(yaml, sub_iface['l2xc']):
|
|
msgs.append("sub-interface %s l2xc target %s is in a bridgedomain" % (sub_ifname, sub_iface['l2xc']))
|
|
result = False
|
|
if has_lcp(yaml, sub_iface['l2xc']):
|
|
msgs.append("sub-interface %s l2xc target %s cannot be an LCP" % (sub_ifname, sub_iface['l2xc']))
|
|
result = False
|
|
if has_address(yaml, sub_iface['l2xc']):
|
|
msgs.append("sub-interface %s l2xc target %s cannot have an address" % (sub_ifname, sub_iface['l2xc']))
|
|
result = False
|
|
|
|
|
|
return result, msgs
|