Files
vppcfg/config/loopback.py

91 lines
2.9 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 config.lcp as lcp
import config.address as address
import config.mac as mac
def get_loopbacks(yaml):
"""Return a list of all loopbacks."""
ret = []
if "loopbacks" in yaml:
for ifname, iface in yaml["loopbacks"].items():
ret.append(ifname)
return ret
def get_by_lcp_name(yaml, lcpname):
"""Returns the loopback by a given lcp name, or None,None if it does not exist"""
if not "loopbacks" in yaml:
return None, None
for ifname, iface in yaml["loopbacks"].items():
if "lcp" in iface and iface["lcp"] == lcpname:
return ifname, iface
return None, None
def get_by_name(yaml, ifname):
"""Return the loopback by name, if it exists. Return None otherwise."""
try:
if ifname in yaml["loopbacks"]:
return ifname, yaml["loopbacks"][ifname]
except:
pass
return None, None
def is_loopback(yaml, ifname):
"""Returns True if the interface name is an existing loopback."""
ifname, iface = get_by_name(yaml, ifname)
return not iface == None
def validate_loopbacks(yaml):
result = True
msgs = []
logger = logging.getLogger("vppcfg.config")
logger.addHandler(logging.NullHandler())
if not "loopbacks" in yaml:
return result, msgs
for ifname, iface in yaml["loopbacks"].items():
logger.debug(f"loopback {iface}")
instance = int(ifname[4:])
if instance > 4095:
msgs.append(
f"loopback {ifname} has instance {int(instance)} which is too large"
)
result = False
if "lcp" in iface and not lcp.is_unique(yaml, iface["lcp"]):
msgs.append(
f"loopback {ifname} does not have a unique LCP name {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(
f"loopback {ifname} IP address {a} conflicts with another"
)
result = False
if "mac" in iface and mac.is_multicast(iface["mac"]):
msgs.append(
f"loopback {ifname} MAC address {iface['mac']} cannot be multicast"
)
result = False
return result, msgs