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"""
Capirca ACL
===========
Generate ACL (firewall) configuration for network devices.
.. versionadded:: 2017.7.0
:codeauthor: Mircea Ulinic <ping@mirceaulinic.net> & Robert Ankeny <robankeny@google.com>
:maturity: new
:depends: capirca
:platform: unix
Dependencies
------------
The firewall configuration is generated by Capirca_.
.. _Capirca: https://github.com/google/capirca
To install Capirca, execute: ``pip install capirca``.
"""
import datetime
import inspect
import logging
import re
import salt.utils.files
log = logging.getLogger(__file__)
try:
import capirca
import capirca.aclgen
import capirca.lib.aclgenerator
import capirca.lib.policy
HAS_CAPIRCA = True
except ImportError:
HAS_CAPIRCA = False
# ------------------------------------------------------------------------------
# module properties
# ------------------------------------------------------------------------------
__virtualname__ = "capirca"
__proxyenabled__ = ["*"]
# allow any proxy type
# ------------------------------------------------------------------------------
# property functions
# ------------------------------------------------------------------------------
def __virtual__():
"""
This module requires at least Capirca to work.
"""
if HAS_CAPIRCA:
return __virtualname__
else:
return (False, "The capirca module (capirca_acl) cannot be loaded.")
# ------------------------------------------------------------------------------
# module globals
# ------------------------------------------------------------------------------
# define the default values for all possible term fields
# we could also extract them from the `policy` module, inspecting the `Policy`
# class, but that might be overkill & it would make the code less obvious.
# we can revisit this later if necessary.
_TERM_FIELDS = {
"action": [],
"address": [],
"address_exclude": [],
"comment": [],
"counter": None,
"expiration": None,
"destination_address": [],
"destination_address_exclude": [],
"destination_port": [],
"destination_prefix": [],
"forwarding_class": [],
"forwarding_class_except": [],
"logging": [],
"log_name": None,
"loss_priority": None,
"option": [],
"owner": None,
"policer": None,
"port": [],
"precedence": [],
"principals": [],
"protocol": [],
"protocol_except": [],
"qos": None,
"pan_application": [],
"routing_instance": None,
"source_address": [],
"source_address_exclude": [],
"source_port": [],
"source_prefix": [],
"verbatim": [],
"packet_length": None,
"fragment_offset": None,
"hop_limit": None,
"icmp_type": [],
"icmp_code": None,
"ether_type": [],
"traffic_class_count": None,
"traffic_type": [],
"translated": False,
"dscp_set": None,
"dscp_match": [],
"dscp_except": [],
"next_ip": None,
"flexible_match_range": [],
"source_prefix_except": [],
"destination_prefix_except": [],
"vpn": None,
"source_tag": [],
"destination_tag": [],
"source_interface": None,
"destination_interface": None,
"platform": [],
"platform_exclude": [],
"timeout": None,
"flattened": False,
"flattened_addr": None,
"flattened_saddr": None,
"flattened_daddr": None,
"priority": None,
"ttl": None,
}
# IP-type fields
# when it comes to IP fields, Capirca does not ingest raw text
# but they need to be converted to `nacaddr.IP`
# this pre-processing is done in `_clean_term_opts`
_IP_FILEDS = [
"source_address",
"source_address_exclude",
"destination_address",
"address",
"address_exclude",
"flattened_addr",
"flattened_saddr",
"flattened_daddr",
"next_ip",
]
_SERVICES = {}
# ------------------------------------------------------------------------------
# helper functions -- will not be exported
# ------------------------------------------------------------------------------
if HAS_CAPIRCA:
_TempTerm = capirca.lib.policy.Term
def _add_object(self, obj):
return
setattr(_TempTerm, "AddObject", _add_object)
dumy_term = _TempTerm(None)
for item in dir(dumy_term):
if hasattr(item, "__func__") or item.startswith("_") or item != item.lower():
continue
_TERM_FIELDS[item] = getattr(dumy_term, item)
class _Policy(capirca.lib.policy.Policy):
"""
Extending the Capirca Policy class to allow inserting custom filters.
"""
def __init__(self):
self.filters = []
self.filename = ""
class _Term(capirca.lib.policy.Term):
"""
Extending the Capirca Term class to allow setting field valued on the fly.
"""
def __init__(self):
for field, default in _TERM_FIELDS.items():
setattr(self, field, default)
def _import_platform_generator(platform):
"""
Given a specific platform (under the Capirca conventions),
return the generator class.
The generator class is identified looking under the <platform> module
for a class inheriting the `ACLGenerator` class.
"""
log.debug("Using platform: %s", platform)
for mod_name, mod_obj in inspect.getmembers(capirca.aclgen):
if mod_name == platform and inspect.ismodule(mod_obj):
for plat_obj_name, plat_obj in inspect.getmembers(
mod_obj
): # pylint: disable=unused-variable
if inspect.isclass(plat_obj) and issubclass(
plat_obj, capirca.lib.aclgenerator.ACLGenerator
):
log.debug("Identified Capirca class %s for %s", plat_obj, platform)
return plat_obj
log.error("Unable to identify any Capirca plaform class for %s", platform)
def _get_services_mapping():
"""
Build a map of services based on the IANA assignment list:
http://www.iana.org/assignments/port-numbers
It will load the /etc/services file and will build the mapping on the fly,
similar to the Capirca's SERVICES file:
https://github.com/google/capirca/blob/master/def/SERVICES.svc
As this module is be available on Unix systems only,
we'll read the services from /etc/services.
In the worst case, the user will not be able to specify the
services shortcut and they will need to specify the protocol / port combination
using the source_port / destination_port & protocol fields.
"""
if _SERVICES:
return _SERVICES
services_txt = ""
try:
with salt.utils.files.fopen("/etc/services", "r") as srv_f:
services_txt = salt.utils.stringutils.to_unicode(srv_f.read())
except OSError as ioe:
log.error("Unable to read from /etc/services:")
log.error(ioe)
return _SERVICES # no mapping possible, sorry
# will return the default mapping
service_rgx = re.compile(r"^([a-zA-Z0-9-]+)\s+(\d+)\/(tcp|udp)(.*)$")
for line in services_txt.splitlines():
service_rgx_s = service_rgx.search(line)
if service_rgx_s and len(service_rgx_s.groups()) == 4:
srv_name, port, protocol, _ = service_rgx_s.groups()
if srv_name not in _SERVICES:
_SERVICES[srv_name] = {"port": [], "protocol": []}
try:
_SERVICES[srv_name]["port"].append(int(port))
except ValueError as verr:
log.error(verr)
log.error("Did not read that properly:")
log.error(line)
log.error(
"Please report the above error: %s does not seem a valid port"
" value!",
port,
)
_SERVICES[srv_name]["protocol"].append(protocol)
return _SERVICES
def _translate_port(port):
"""
Look into services and return the port value using the
service name as lookup value.
"""
services = _get_services_mapping()
if port in services and services[port]["port"]:
return services[port]["port"][0]
return port
def _make_it_list(dict_, field_name, value):
"""
Return the object list.
"""
prev_value = []
# firsly we'll collect the prev value
if field_name in dict_:
prev_value = dict_[field_name]
if value is None:
return prev_value
elif isinstance(value, (tuple, list)):
# other type of iterables
if field_name in ("source_port", "destination_port"):
# port fields are more special
# they can either be a list of integers, either a list of tuples
# list of integers = a list of ports
# list of tuples = a list of ranges,
# e.g.: [(1000, 2000), (3000, 4000)] means the 1000-2000 and 3000-4000 ranges
portval = []
for port in value:
if not isinstance(port, (tuple, list)):
# to make sure everything is consistent,
# we'll transform indivitual ports into tuples
# thus an individual port e.g. 1000 will be transormed into the port range 1000-1000
# which is the equivalent
# but assures consistency for the Capirca parser
portval.append((port, port))
else:
portval.append(port)
translated_portval = []
# and the ports sent as string, e.g. ntp instead of 123
# needs to be translated
# again, using the same /etc/services
for port_start, port_end in portval:
if not isinstance(port_start, int):
port_start = _translate_port(port_start)
if not isinstance(port_end, int):
port_end = _translate_port(port_end)
translated_portval.append((port_start, port_end))
return list(set(prev_value + translated_portval))
return list(set(prev_value + list(value)))
if field_name in ("source_port", "destination_port"):
if not isinstance(value, int):
value = _translate_port(value)
return list(set(prev_value + [(value, value)])) # a list of tuples
# anything else will be enclosed in a list-type
return list(set(prev_value + [value]))
def _clean_term_opts(term_opts):
"""
Cleanup the term opts:
- strip Null and empty valuee, defaulting their value to their base definition from _TERM_FIELDS
- convert to `nacaddr.IP` fields from `_IP_FILEDS`
- create lists for those fields requiring it
"""
clean_opts = {}
_services = _get_services_mapping()
for field, value in term_opts.items():
# firstly we'll process special fields like source_service or destination_services
# which will inject values directly in the source or destination port and protocol
if field == "source_service" and value:
if isinstance(value, str):
value = _make_it_list(clean_opts, field, value)
log.debug("Processing special source services:")
log.debug(value)
for service in value:
if service and service in _services:
# if valid source_service
# take the port and protocol values from the global and inject in the term config
clean_opts["source_port"] = _make_it_list(
clean_opts, "source_port", _services[service]["port"]
)
clean_opts["protocol"] = _make_it_list(
clean_opts, "protocol", _services[service]["protocol"]
)
log.debug(
"Built source_port field, after processing special source services:"
)
log.debug(clean_opts.get("source_port"))
log.debug("Built protocol field, after processing special source services:")
log.debug(clean_opts.get("protocol"))
elif field == "destination_service" and value:
if isinstance(value, str):
value = _make_it_list(clean_opts, field, value)
log.debug("Processing special destination services:")
log.debug(value)
for service in value:
if service and service in _services:
# if valid destination_service
# take the port and protocol values from the global and inject in the term config
clean_opts["destination_port"] = _make_it_list(
clean_opts, "destination_port", _services[service]["port"]
)
clean_opts["protocol"] = _make_it_list(
clean_opts, "protocol", _services[service]["protocol"]
)
log.debug(
"Built source_port field, after processing special destination"
" services:"
)
log.debug(clean_opts.get("destination_service"))
log.debug(
"Built protocol field, after processing special destination services:"
)
log.debug(clean_opts.get("protocol"))
# not a special field, but it has to be a valid one
elif field in _TERM_FIELDS and value and value != _TERM_FIELDS[field]:
# if not a special field type
if isinstance(_TERM_FIELDS[field], list):
value = _make_it_list(clean_opts, field, value)
if field in _IP_FILEDS:
# IP-type fields need to be transformed
ip_values = []
for addr in value:
ip_values.append(capirca.lib.policy.nacaddr.IP(addr))
value = ip_values[:]
clean_opts[field] = value
return clean_opts
def _lookup_element(lst, key):
"""
Find an dictionary in a list of dictionaries, given its main key.
"""
if not lst:
return {}
for ele in lst:
if not ele or not isinstance(ele, dict):
continue
if key in ele:
return ele[key]
return {}
def _get_pillar_cfg(pillar_key, pillarenv=None, saltenv=None):
"""
Retrieve the pillar data from the right environment.
"""
pillar_cfg = __salt__["pillar.get"](
pillar_key, pillarenv=pillarenv, saltenv=saltenv
)
return pillar_cfg
def _cleanup(lst):
"""
Return a list of non-empty dictionaries.
"""
clean = []
for ele in lst:
if ele and isinstance(ele, dict):
clean.append(ele)
return clean
def _merge_list_of_dict(first, second, prepend=True):
"""
Merge lists of dictionaries.
Each element of the list is a dictionary having one single key.
That key is then used as unique lookup.
The first element list has higher priority than the second.
When there's an overlap between the two lists,
it won't change the position, but the content.
"""
first = _cleanup(first)
second = _cleanup(second)
if not first and not second:
return []
if not first and second:
return second
if first and not second:
return first
# Determine overlaps
# So we don't change the position of the existing terms/filters
overlaps = []
merged = []
appended = []
for ele in first:
if _lookup_element(second, next(iter(ele))):
overlaps.append(ele)
elif prepend:
merged.append(ele)
elif not prepend:
appended.append(ele)
for ele in second:
ele_key = next(iter(ele))
if _lookup_element(overlaps, ele_key):
# If there's an overlap, get the value from the first
# But inserted into the right position
ele_val_first = _lookup_element(first, ele_key)
merged.append({ele_key: ele_val_first})
else:
merged.append(ele)
if not prepend:
merged.extend(appended)
return merged
def _get_term_object(
filter_name,
term_name,
pillar_key="acl",
pillarenv=None,
saltenv=None,
merge_pillar=True,
**term_fields,
):
"""
Return an instance of the ``_Term`` class given the term options.
"""
log.debug("Generating config for term %s under filter %s", term_name, filter_name)
term = _Term()
term.name = term_name
term_opts = {}
if merge_pillar:
term_opts = get_term_pillar(
filter_name,
term_name,
pillar_key=pillar_key,
saltenv=saltenv,
pillarenv=pillarenv,
)
log.debug("Merging with pillar data:")
log.debug(term_opts)
term_opts = _clean_term_opts(term_opts)
log.debug("Cleaning up pillar data:")
log.debug(term_opts)
log.debug("Received processing opts:")
log.debug(term_fields)
log.debug("Cleaning up processing opts:")
term_fields = _clean_term_opts(term_fields)
log.debug(term_fields)
log.debug("Final term opts:")
term_opts.update(term_fields)
log.debug(term_fields)
for field, value in term_opts.items():
# setting the field attributes to the term instance of _Term
setattr(term, field, value)
log.debug("Term config:")
log.debug(str(term))
return term
def _get_policy_object(
platform,
filters=None,
pillar_key="acl",
pillarenv=None,
saltenv=None,
merge_pillar=True,
):
"""
Return an instance of the ``_Policy`` class given the filters config.
"""
policy = _Policy()
policy_filters = []
if not filters:
filters = []
for filter_ in filters:
if not filter_ or not isinstance(filter_, dict):
continue # go to the next filter
filter_name, filter_config = next(iter(filter_.items()))
header = capirca.lib.policy.Header() # same header everywhere
target_opts = [platform, filter_name]
filter_options = filter_config.pop("options", None)
if filter_options:
filter_options = _make_it_list({}, filter_name, filter_options)
# make sure the filter options are sent as list
target_opts.extend(filter_options)
target = capirca.lib.policy.Target(target_opts)
header.AddObject(target)
filter_terms = []
for term_ in filter_config.get("terms", []):
if term_ and isinstance(term_, dict):
term_name, term_fields = next(iter(term_.items()))
term = _get_term_object(
filter_name,
term_name,
pillar_key=pillar_key,
pillarenv=pillarenv,
saltenv=saltenv,
merge_pillar=merge_pillar,
**term_fields,
)
filter_terms.append(term)
policy_filters.append((header, filter_terms))
policy.filters = policy_filters
log.debug("Policy config:")
log.debug(str(policy))
platform_generator = _import_platform_generator(platform)
policy_config = platform_generator(policy, 2)
log.debug("Generating policy config for %s:", platform)
log.debug(str(policy_config))
return policy_config
def _revision_tag(
text,
revision_id=None,
revision_no=None,
revision_date=True,
revision_date_format="%Y/%m/%d",
):
"""
Refactor revision tag comments.
Capirca generates the filter text having the following tag keys:
- $Id:$
- $Revision:$
- $Date:$
This function goes through all the config lines and replaces
those tags with the content requested by the user.
If a certain value is not provided, the corresponding tag will be stripped.
"""
timestamp = datetime.datetime.now().strftime(revision_date_format)
new_text = []
for line in text.splitlines():
if "$Id:$" in line:
if not revision_id: # if no explicit revision ID required
continue # jump to next line, ignore this one
line = line.replace("$Id:$", f"$Id: {revision_id} $")
if "$Revision:$" in line:
if not revision_no: # if no explicit revision number required
continue # jump to next line, ignore this one
line = line.replace("$Revision:$", f"$Revision: {revision_no} $")
if "$Date:$" in line:
if not revision_date:
continue # jump
line = line.replace("$Date:$", f"$Date: {timestamp} $")
new_text.append(line)
return "\n".join(new_text)
# ------------------------------------------------------------------------------
# callable functions
# ------------------------------------------------------------------------------
def get_term_config(
platform,
filter_name,
term_name,
filter_options=None,
pillar_key="acl",
pillarenv=None,
saltenv=None,
merge_pillar=True,
revision_id=None,
revision_no=None,
revision_date=True,
revision_date_format="%Y/%m/%d",
source_service=None,
destination_service=None,
**term_fields,
):
"""
Return the configuration of a single policy term.
platform
The name of the Capirca platform.
filter_name
The name of the policy filter.
term_name
The name of the term.
filter_options
Additional filter options. These options are platform-specific.
E.g.: ``inet6``, ``bridge``, ``object-group``,
See the complete list of options_.
.. _options: https://github.com/google/capirca/wiki/Policy-format#header-section
pillar_key: ``acl``
The key in the pillar containing the default attributes values. Default: ``acl``.
If the pillar contains the following structure:
.. code-block:: yaml
firewall:
- my-filter:
terms:
- my-term:
source_port: 1234
source_address:
- 1.2.3.4/32
- 5.6.7.8/32
The ``pillar_key`` field would be specified as ``firewall``.
pillarenv
Query the master to generate fresh pillar data on the fly,
specifically from the requested pillar environment.
saltenv
Included only for compatibility with
:conf_minion:`pillarenv_from_saltenv`, and is otherwise ignored.
merge_pillar: ``True``
Merge the CLI variables with the pillar. Default: ``True``.
revision_id
Add a comment in the term config having the description for the changes applied.
revision_no
The revision count.
revision_date: ``True``
Boolean flag: display the date when the term configuration was generated. Default: ``True``.
revision_date_format: ``%Y/%m/%d``
The date format to be used when generating the perforce data. Default: ``%Y/%m/%d`` (<year>/<month>/<day>).
source_service
A special service to choose from. This is a helper so the user is able to
select a source just using the name, instead of specifying a source_port and protocol.
As this module is available on Unix platforms only,
it reads the IANA_ port assignment from ``/etc/services``.
If the user requires additional shortcuts to be referenced, they can add entries under ``/etc/services``,
which can be managed using the :mod:`file state <salt.states.file>`.
.. _IANA: http://www.iana.org/assignments/port-numbers
destination_service
A special service to choose from. This is a helper so the user is able to
select a source just using the name, instead of specifying a destination_port and protocol.
Allows the same options as ``source_service``.
term_fields
Term attributes.
To see what fields are supported, please consult the list of supported keywords_.
Some platforms have few other optional_ keywords.
.. _keywords: https://github.com/google/capirca/wiki/Policy-format#keywords
.. _optional: https://github.com/google/capirca/wiki/Policy-format#optionally-supported-keywords
.. note::
The following fields are accepted:
- action
- address
- address_exclude
- comment
- counter
- expiration
- destination_address
- destination_address_exclude
- destination_port
- destination_prefix
- forwarding_class
- forwarding_class_except
- logging
- log_name
- loss_priority
- option
- policer
- port
- precedence
- principals
- protocol
- protocol_except
- qos
- pan_application
- routing_instance
- source_address
- source_address_exclude
- source_port
- source_prefix
- verbatim
- packet_length
- fragment_offset
- hop_limit
- icmp_type
- ether_type
- traffic_class_count
- traffic_type
- translated
- dscp_set
- dscp_match
- dscp_except
- next_ip
- flexible_match_range
- source_prefix_except
- destination_prefix_except
- vpn
- source_tag
- destination_tag
- source_interface
- destination_interface
- flattened
- flattened_addr
- flattened_saddr
- flattened_daddr
- priority
.. note::
The following fields can be also a single value and a list of values:
- action
- address
- address_exclude
- comment
- destination_address
- destination_address_exclude
- destination_port
- destination_prefix
- forwarding_class
- forwarding_class_except
- logging
- option
- port
- precedence
- principals
- protocol
- protocol_except
- pan_application
- source_address
- source_address_exclude
- source_port
- source_prefix
- verbatim
- icmp_type
- ether_type
- traffic_type
- dscp_match
- dscp_except
- flexible_match_range
- source_prefix_except
- destination_prefix_except
- source_tag
- destination_tag
- source_service
- destination_service
Example: ``destination_address`` can be either defined as:
.. code-block:: yaml
destination_address: 172.17.17.1/24
or as a list of destination IP addresses:
.. code-block:: yaml
destination_address:
- 172.17.17.1/24
- 172.17.19.1/24
or a list of services to be matched:
.. code-block:: yaml
source_service:
- ntp
- snmp
- ldap
- bgpd
.. note::
The port fields ``source_port`` and ``destination_port`` can be used as above to select either
a single value, either a list of values, but also they can select port ranges. Example:
.. code-block:: yaml
source_port:
- [1000, 2000]
- [3000, 4000]
With the configuration above, the user is able to select the 1000-2000 and 3000-4000 source port ranges.
CLI Example:
.. code-block:: bash
salt '*' capirca.get_term_config arista filter-name term-name source_address=1.2.3.4 destination_address=5.6.7.8 action=accept
Output Example:
.. code-block:: text
! $Date: 2017/03/22 $
no ip access-list filter-name
ip access-list filter-name
remark term-name
permit ip host 1.2.3.4 host 5.6.7.8
exit
"""
terms = []
term = {term_name: {}}
term[term_name].update(term_fields)
term[term_name].update(
{
"source_service": _make_it_list({}, "source_service", source_service),
"destination_service": _make_it_list(
{}, "destination_service", destination_service
),
}
)
terms.append(term)
if not filter_options:
filter_options = []
return get_filter_config(
platform,
filter_name,
filter_options=filter_options,
terms=terms,
pillar_key=pillar_key,
pillarenv=pillarenv,
saltenv=saltenv,
merge_pillar=merge_pillar,
only_lower_merge=True,
revision_id=revision_id,
revision_no=revision_no,
revision_date=revision_date,
revision_date_format=revision_date_format,
)
def get_filter_config(
platform,
filter_name,
filter_options=None,
terms=None,
prepend=True,
pillar_key="acl",
pillarenv=None,
saltenv=None,
merge_pillar=True,
only_lower_merge=False,
revision_id=None,
revision_no=None,
revision_date=True,
revision_date_format="%Y/%m/%d",
):
"""
Return the configuration of a policy filter.
platform
The name of the Capirca platform.
filter_name
The name of the policy filter.
filter_options
Additional filter options. These options are platform-specific.
See the complete list of options_.
.. _options: https://github.com/google/capirca/wiki/Policy-format#header-section
terms
List of terms for this policy filter.
If not specified or empty, will try to load the configuration from the pillar,
unless ``merge_pillar`` is set as ``False``.
prepend: ``True``
When ``merge_pillar`` is set as ``True``, the final list of terms generated by merging
the terms from ``terms`` with those defined in the pillar (if any): new terms are prepended
at the beginning, while existing ones will preserve the position. To add the new terms
at the end of the list, set this argument to ``False``.
pillar_key: ``acl``
The key in the pillar containing the default attributes values. Default: ``acl``.
pillarenv
Query the master to generate fresh pillar data on the fly,
specifically from the requested pillar environment.
saltenv
Included only for compatibility with
:conf_minion:`pillarenv_from_saltenv`, and is otherwise ignored.
merge_pillar: ``True``
Merge the CLI variables with the pillar. Default: ``True``.
only_lower_merge: ``False``
Specify if it should merge only the terms fields. Otherwise it will try
to merge also filters fields. Default: ``False``.
revision_id
Add a comment in the filter config having the description for the changes applied.
revision_no
The revision count.
revision_date: ``True``
Boolean flag: display the date when the filter configuration was generated. Default: ``True``.
revision_date_format: ``%Y/%m/%d``
The date format to be used when generating the perforce data. Default: ``%Y/%m/%d`` (<year>/<month>/<day>).
CLI Example:
.. code-block:: bash
salt '*' capirca.get_filter_config ciscoxr my-filter pillar_key=netacl
Output Example:
.. code-block:: text
! $Id:$
! $Date:$
! $Revision:$
no ipv4 access-list my-filter
ipv4 access-list my-filter
remark $Id:$
remark my-term
deny ipv4 any eq 1234 any
deny ipv4 any eq 1235 any
remark my-other-term
permit tcp any range 5678 5680 any
exit
The filter configuration has been loaded from the pillar, having the following structure:
.. code-block:: yaml
netacl:
- my-filter:
terms:
- my-term:
source_port: [1234, 1235]
action: reject
- my-other-term:
source_port:
- [5678, 5680]
protocol: tcp
action: accept
"""
if not filter_options:
filter_options = []
if not terms:
terms = []
if merge_pillar and not only_lower_merge:
acl_pillar_cfg = _get_pillar_cfg(
pillar_key, saltenv=saltenv, pillarenv=pillarenv
)
filter_pillar_cfg = _lookup_element(acl_pillar_cfg, filter_name)
filter_options = filter_options or filter_pillar_cfg.pop("options", None)
if filter_pillar_cfg:
# Only when it was able to find the filter in the ACL config
pillar_terms = filter_pillar_cfg.get(
"terms", []
) # No problem if empty in the pillar
terms = _merge_list_of_dict(terms, pillar_terms, prepend=prepend)
# merge the passed variable with the pillar data
# any filter term not defined here, will be appended from the pillar
# new terms won't be removed
filters = []
filters.append(
{
filter_name: {
"options": _make_it_list({}, filter_name, filter_options),
"terms": terms,
}
}
)
return get_policy_config(
platform,
filters=filters,
pillar_key=pillar_key,
pillarenv=pillarenv,
saltenv=saltenv,
merge_pillar=merge_pillar,
only_lower_merge=True,
revision_id=revision_id,
revision_no=revision_no,
revision_date=revision_date,
revision_date_format=revision_date_format,
)
def get_policy_config(
platform,
filters=None,
prepend=True,
pillar_key="acl",
pillarenv=None,
saltenv=None,
merge_pillar=True,
only_lower_merge=False,
revision_id=None,
revision_no=None,
revision_date=True,
revision_date_format="%Y/%m/%d",
):
"""
Return the configuration of the whole policy.
platform
The name of the Capirca platform.
filters
List of filters for this policy.
If not specified or empty, will try to load the configuration from the pillar,
unless ``merge_pillar`` is set as ``False``.
prepend: ``True``
When ``merge_pillar`` is set as ``True``, the final list of filters generated by merging
the filters from ``filters`` with those defined in the pillar (if any): new filters are prepended
at the beginning, while existing ones will preserve the position. To add the new filters
at the end of the list, set this argument to ``False``.
pillar_key: ``acl``
The key in the pillar containing the default attributes values. Default: ``acl``.
pillarenv
Query the master to generate fresh pillar data on the fly,
specifically from the requested pillar environment.
saltenv
Included only for compatibility with
:conf_minion:`pillarenv_from_saltenv`, and is otherwise ignored.
merge_pillar: ``True``
Merge the CLI variables with the pillar. Default: ``True``.
only_lower_merge: ``False``
Specify if it should merge only the filters and terms fields. Otherwise it will try
to merge everything at the policy level. Default: ``False``.
revision_id
Add a comment in the policy config having the description for the changes applied.
revision_no
The revision count.
revision_date: ``True``
Boolean flag: display the date when the policy configuration was generated. Default: ``True``.
revision_date_format: ``%Y/%m/%d``
The date format to be used when generating the perforce data. Default: ``%Y/%m/%d`` (<year>/<month>/<day>).
CLI Example:
.. code-block:: bash
salt '*' capirca.get_policy_config juniper pillar_key=netacl
Output Example:
.. code-block:: text
firewall {
family inet {
replace:
/*
** $Id:$
** $Date:$
** $Revision:$
**
*/
filter my-filter {
term my-term {
from {
source-port [ 1234 1235 ];
}
then {
reject;
}
}
term my-other-term {
from {
protocol tcp;
source-port 5678-5680;
}
then accept;
}
}
}
}
firewall {
family inet {
replace:
/*
** $Id:$
** $Date:$
** $Revision:$
**
*/
filter my-other-filter {
interface-specific;
term dummy-term {
from {
protocol [ tcp udp ];
}
then {
reject;
}
}
}
}
}
The policy configuration has been loaded from the pillar, having the following structure:
.. code-block:: yaml
netacl:
- my-filter:
options:
- not-interface-specific
terms:
- my-term:
source_port: [1234, 1235]
action: reject
- my-other-term:
source_port:
- [5678, 5680]
protocol: tcp
action: accept
- my-other-filter:
terms:
- dummy-term:
protocol:
- tcp
- udp
action: reject
"""
if not filters:
filters = []
if merge_pillar and not only_lower_merge:
# the pillar key for the policy config is the `pillar_key` itself
policy_pillar_cfg = _get_pillar_cfg(
pillar_key, saltenv=saltenv, pillarenv=pillarenv
)
# now, let's merge everything witht the pillar data
# again, this will not remove any extra filters/terms
# but it will merge with the pillar data
# if this behaviour is not wanted, the user can set `merge_pillar` as `False`
filters = _merge_list_of_dict(filters, policy_pillar_cfg, prepend=prepend)
policy_object = _get_policy_object(
platform,
filters=filters,
pillar_key=pillar_key,
pillarenv=pillarenv,
saltenv=saltenv,
merge_pillar=merge_pillar,
)
policy_text = str(policy_object)
return _revision_tag(
policy_text,
revision_id=revision_id,
revision_no=revision_no,
revision_date=revision_date,
revision_date_format=revision_date_format,
)
def get_filter_pillar(filter_name, pillar_key="acl", pillarenv=None, saltenv=None):
"""
Helper that can be used inside a state SLS,
in order to get the filter configuration given its name.
filter_name
The name of the filter.
pillar_key
The root key of the whole policy config.
pillarenv
Query the master to generate fresh pillar data on the fly,
specifically from the requested pillar environment.
saltenv
Included only for compatibility with
:conf_minion:`pillarenv_from_saltenv`, and is otherwise ignored.
"""
pillar_cfg = _get_pillar_cfg(pillar_key, pillarenv=pillarenv, saltenv=saltenv)
return _lookup_element(pillar_cfg, filter_name)
def get_term_pillar(
filter_name, term_name, pillar_key="acl", pillarenv=None, saltenv=None
):
"""
Helper that can be used inside a state SLS,
in order to get the term configuration given its name,
under a certain filter uniquely identified by its name.
filter_name
The name of the filter.
term_name
The name of the term.
pillar_key: ``acl``
The root key of the whole policy config. Default: ``acl``.
pillarenv
Query the master to generate fresh pillar data on the fly,
specifically from the requested pillar environment.
saltenv
Included only for compatibility with
:conf_minion:`pillarenv_from_saltenv`, and is otherwise ignored.
"""
filter_pillar_cfg = get_filter_pillar(
filter_name, pillar_key=pillar_key, pillarenv=pillarenv, saltenv=saltenv
)
term_pillar_cfg = filter_pillar_cfg.get("terms", [])
term_opts = _lookup_element(term_pillar_cfg, term_name)
return term_opts