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T6773: RFC-2136 support for Kea DHCP4 server #4153

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T6773: RFC-2136 support for Kea DHCP4 server #4153

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929a238
T6773: dhcp-server: ddns: DDNS support WIP
abukharov Oct 2, 2024
14c54ee
T6773: dhcp-server: ddns: Dynamic DNS support for KEA WIP
abukharov Oct 4, 2024
3f50c2d
T6773: dhcp-server: ddns: Configure Kea D2 and make some smoke tests
abukharov Oct 4, 2024
58c0c6f
T6773: dhcp-server: ddns: Redo the ddns option layout to support scop…
abukharov Oct 5, 2024
c994709
T6773: dhcp-server: ddns: Add ddns-ttl-percent option
abukharov Oct 6, 2024
248b18c
T6773: dhcp-server: ddns: Fix the smoketests for the new parameters
abukharov Oct 6, 2024
cfc438e
T6773: dhcp-server: ddns: Fixes to DDNS config templates and smoketests
abukharov Oct 12, 2024
3a5d9d6
T6773: dhcp-server: ddns: Fix config load test for DHCP server
abukharov Oct 12, 2024
9f76ec0
T6773: dhcp-server: ddns: Sorry, quotes are important
abukharov Oct 12, 2024
885427e
T6773: dhcp-server: ddns: Rename a few options according to conventions
abukharov Oct 16, 2024
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30 changes: 30 additions & 0 deletions data/templates/dhcp-server/kea-dhcp-ddns.conf.j2
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@@ -0,0 +1,30 @@
{
"DhcpDdns": {
"ip-address": "127.0.0.1",
"port": 53001,
"control-socket": {
"socket-type": "unix",
"socket-name": "/run/kea/kea-ddns-ctrl-socket"
},
"tsig-keys": {{ dynamic_dns_update | kea_dynamic_dns_update_tsig_key_json }},
"forward-ddns" : {
"ddns-domains": {{ dynamic_dns_update | kea_dynamic_dns_update_domains('forward_domain') }}
},
"reverse-ddns" : {
"ddns-domains": {{ dynamic_dns_update | kea_dynamic_dns_update_domains('reverse_domain') }}
},
"loggers": [
{
"name": "kea-dhcp-ddns",
"output_options": [
{
"output": "stdout",
"pattern": "%-5p %m\n"
}
],
"severity": "INFO",
"debuglevel": 0
}
]
}
}
13 changes: 13 additions & 0 deletions data/templates/dhcp-server/kea-dhcp4.conf.j2
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Expand Up @@ -50,6 +50,19 @@
"space": "ubnt"
}
],
{% if dynamic_dns_update is vyos_defined %}
"dhcp-ddns": {
"enable-updates": true,
"server-ip": "127.0.0.1",
"server-port": 53001,
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"sender-ip": "",
"sender-port": 0,
"max-queue-size": 1024,
"ncr-protocol": "UDP",
"ncr-format": "JSON"
},
{{ dynamic_dns_update | kea_dynamic_dns_update_main_json }}
{% endif %}
"hooks-libraries": [
{% if high_availability is vyos_defined %}
{
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19 changes: 19 additions & 0 deletions interface-definitions/include/dhcp/ddns-dns-server.xml.i
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<!-- include start from dhcp/ddns-dns-server.xml.i -->
<tagNode name="dns-server">
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<properties>
<help>DNS server specification</help>
<valueHelp>
<format>u32:1-999999</format>
<description>Number for this DNS server</description>
</valueHelp>
<constraint>
<validator name="numeric" argument="--range 1-999999"/>
</constraint>
<constraintErrorMessage>DNS server number must be between 1 and 999999</constraintErrorMessage>
</properties>
<children>
#include <include/address-ipv4-ipv6-single.xml.i>
#include <include/port-number.xml.i>
</children>
</tagNode>
<!-- include end -->
103 changes: 103 additions & 0 deletions interface-definitions/include/dhcp/ddns-settings.xml.i
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<!-- include start from dhcp/ddns-settings.xml.i -->
<leafNode name="force-updates">
<properties>
<help>Send updates for this scope</help>
<valueless />
</properties>
</leafNode>
<leafNode name="force-client-update">
<properties>
<help>Always update both forward and reverse DNS data, regardless of the client's request</help>
<valueless />
</properties>
</leafNode>
<leafNode name="force-no-update">
<properties>
<help>Perform a DDNS update, even if the client instructs the server not to</help>
<valueless />
</properties>
</leafNode>
<leafNode name="replace-client-name">
<properties>
<help>Replace client name mode</help>
<completionHelp>
<list>never always when-present when-not-present</list>
</completionHelp>
<valueHelp>
<format>never</format>
<description>Use the name the client sent. If the client sent no name, do not generate
one</description>
</valueHelp>
<valueHelp>
<format>always</format>
<description>Replace the name the client sent. If the client sent no name, generate one
for the client</description>
</valueHelp>
<valueHelp>
<format>when-present</format>
<description>Replace the name the client sent. If the client sent no name, do not
generate one</description>
</valueHelp>
<valueHelp>
<format>when-not-present</format>
<description>Use the name the client sent. If the client sent no name, generate one for
the client</description>
</valueHelp>
<defaultValue>never</defaultValue>
<constraint>
<regex>(never|always|when-present|when-not-present)</regex>
</constraint>
<constraintErrorMessage>Invalid replace client name mode</constraintErrorMessage>
</properties>
</leafNode>
<leafNode name="generated-prefix">
<properties>
<help>The prefix used in the generation of an FQDN</help>
<constraint>
<validator name="fqdn" />
</constraint>
<constraintErrorMessage>Invalid generated prefix</constraintErrorMessage>
</properties>
</leafNode>
<leafNode name="qualifying-suffix">
<properties>
<help>The suffix used when generating an FQDN, or when qualifying a partial name</help>
<constraint>
<validator name="fqdn" />
</constraint>
<constraintErrorMessage>Invalid qualifying suffix</constraintErrorMessage>
</properties>
</leafNode>
<leafNode name="update-on-renew">
<properties>
<help>Update DNS record on lease renew</help>
<valueless />
</properties>
</leafNode>
<leafNode name="use-conflict-resolution">
<properties>
<help>Defines DNS conflict resolution behavior</help>
<valueless />
</properties>
</leafNode>
<leafNode name="ttl-percent">
<properties>
<help>Calculate TTL of the DNS record as a percentage of the lease lifetime</help>
<constraint>
<validator name="numeric" argument="--range 1-100" />
</constraint>
<constraintErrorMessage>Invalid qualifying suffix</constraintErrorMessage>
</properties>
</leafNode>
<leafNode name="hostname-char-set">
<properties>
<help>A regular expression describing the invalid character set in the host name</help>
</properties>
</leafNode>
<leafNode name="hostname-char-replacement">
<properties>
<help>A string of zero or more characters with which to replace each invalid character in
the host name</help>
</properties>
</leafNode>
<!-- include end -->
121 changes: 118 additions & 3 deletions interface-definitions/service_dhcp-server.xml.in
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Expand Up @@ -10,12 +10,111 @@
</properties>
<children>
#include <include/generic-disable-node.xml.i>
<leafNode name="dynamic-dns-update">
<node name="dynamic-dns-update">
<properties>
<help>Dynamically update Domain Name System (RFC4702)</help>
<valueless/>
</properties>
</leafNode>
<children>
#include <include/dhcp/ddns-settings.xml.i>
<tagNode name="tsig-key">
<properties>
<help>TSIG key definition for DNS updates</help>
<constraint>
#include <include/constraint/alpha-numeric-hyphen-underscore.xml.i>
</constraint>
<constraintErrorMessage>Invalid TSIG key name. May only contain letters, numbers, hyphen and underscore</constraintErrorMessage>
</properties>
<children>
<leafNode name="algorithm">
<properties>
<help>TSIG key algorithm</help>
<completionHelp>
<list>hmac-md5 hmac-sha1 hmac-sha224 hmac-sha256 hmac-sha384 hmac-sha512</list>
</completionHelp>
<valueHelp>
<format>hmac-md5</format>
<description>MD5 HMAC algorithm</description>
</valueHelp>
<valueHelp>
<format>hmac-sha1</format>
<description>SHA1 HMAC algorithm</description>
</valueHelp>
<valueHelp>
<format>hmac-sha224</format>
<description>SHA224 HMAC algorithm</description>
</valueHelp>
<valueHelp>
<format>hmac-sha256</format>
<description>SHA256 HMAC algorithm</description>
</valueHelp>
<valueHelp>
<format>hmac-sha384</format>
<description>SHA384 HMAC algorithm</description>
</valueHelp>
<valueHelp>
<format>hmac-sha512</format>
<description>SHA512 HMAC algorithm</description>
</valueHelp>
<constraint>
<regex>(hmac-md5|hmac-sha1|hmac-sha224|hmac-sha256|hmac-sha384|hmac-sha512)</regex>
</constraint>
<constraintErrorMessage>Invalid TSIG key algorithm</constraintErrorMessage>
</properties>
</leafNode>
<leafNode name="secret">
<properties>
<help>TSIG key secret (base64-encoded)</help>
<constraint>
<validator name="base64"/>
</constraint>
</properties>
</leafNode>
</children>
</tagNode>
<tagNode name="forward-domain">
<properties>
<help>Forward DNS domain name</help>
<constraint>
<validator name="fqdn"/>
</constraint>
<constraintErrorMessage>Invalid forward DNS domain name</constraintErrorMessage>
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</properties>
<children>
<leafNode name="key-name">
<properties>
<help>TSIG key name for forward DNS updates</help>
<constraint>
#include <include/constraint/alpha-numeric-hyphen-underscore.xml.i>
</constraint>
<constraintErrorMessage>Invalid TSIG key name. May only contain letters, numbers, numbers, hyphen and underscore</constraintErrorMessage>
</properties>
</leafNode>
#include <include/dhcp/ddns-dns-server.xml.i>
</children>
</tagNode>
<tagNode name="reverse-domain">
<properties>
<help>Reverse DNS domain name</help>
<constraint>
<validator name="fqdn"/>
</constraint>
<constraintErrorMessage>Invalid reverse DNS domain name</constraintErrorMessage>
</properties>
<children>
<leafNode name="key-name">
<properties>
<help>TSIG key name for reverse DNS updates</help>
<constraint>
#include <include/constraint/alpha-numeric-hyphen-underscore.xml.i>
</constraint>
<constraintErrorMessage>Invalid TSIG key name. May only contain letters, numbers, numbers, hyphen and underscore</constraintErrorMessage>
</properties>
</leafNode>
#include <include/dhcp/ddns-dns-server.xml.i>
</children>
</tagNode>
</children>
</node>
<node name="high-availability">
<properties>
<help>DHCP high availability configuration</help>
Expand Down Expand Up @@ -105,6 +204,14 @@
<constraintErrorMessage>Invalid shared network name. May only contain letters, numbers and .-_</constraintErrorMessage>
</properties>
<children>
<node name="dynamic-dns-update">
<properties>
<help>Dynamically update Domain Name System (RFC4702)</help>
</properties>
<children>
#include <include/dhcp/ddns-settings.xml.i>
</children>
</node>
<leafNode name="authoritative">
<properties>
<help>Option to make DHCP server authoritative for this physical network</help>
Expand All @@ -130,6 +237,14 @@
#include <include/dhcp/option-v4.xml.i>
#include <include/generic-description.xml.i>
#include <include/generic-disable-node.xml.i>
<node name="dynamic-dns-update">
<properties>
<help>Dynamically update Domain Name System (RFC4702)</help>
</properties>
<children>
#include <include/dhcp/ddns-settings.xml.i>
</children>
</node>
<leafNode name="exclude">
<properties>
<help>IP address to exclude from DHCP lease range</help>
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38 changes: 38 additions & 0 deletions python/vyos/kea.py
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Expand Up @@ -172,6 +172,9 @@ def kea_parse_subnet(subnet, config):
reservations.append(reservation)
out['reservations'] = reservations

if 'dynamic_dns_update' in config:
out.update(kea_parse_ddns_settings(config['dynamic_dns_update']))

return out

def kea6_parse_options(config):
Expand Down Expand Up @@ -295,6 +298,41 @@ def kea6_parse_subnet(subnet, config):

return out

def kea_parse_tsig_algo(algo_spec):
translate = {
'hmac-md5': 'HMAC-MD5',
'hmac-sha1': 'HMAC-SHA1',
'hmac-sha224': 'HMAC-SHA224',
'hmac-sha256': 'HMAC-SHA256',
'hmac-sha384': 'HMAC-SHA384',
'hmac-sha512': 'HMAC-SHA512'
}
return translate[algo_spec]

def kea_parse_ddns_settings(config):
data = {
"ddns-send-updates": 'force_updates' in config,
"ddns-override-no-update": 'force_no_update' in config,
"ddns-override-client-update": 'force_client_update' in config,
"ddns-update-on-renew": 'update_on_renew' in config,
"ddns-use-conflict-resolution": 'use_conflict_resolution' in config,
}

if 'replace_client_name' in config:
data['ddns-replace-client-name'] = config['replace_client_name']
if 'generated_prefix' in config:
data['ddns-generated-prefix'] = config['generated_prefix']
if 'qualifying_suffix' in config:
data['ddns-qualifying-suffix'] = config['qualifying_suffix']
if 'ttl_percent' in config:
data['ddns-ttl-percent'] = int(config['ttl_percent']) / 100
if 'hostname_char_set' in config:
data['hostname-char-set'] = config['hostname_char_set']
if 'hostname_char_replacement' in config:
data['hostname-char-replacement'] = config['hostname_char_replacement']

return data

def _ctrl_socket_command(inet, command, args=None):
path = kea_ctrl_socket.format(inet=inet)

Expand Down
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