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Reinstate support for hostname in DHCP reservation. Having `hostname` in
allows for server-side assignment of hostname. This is useful for static
lookup of hostname.
Ensure that hostname is a valid FQDN (doesn't have underscore, etc.)
Additionally, support using either of DUID or MAC address for
reservation. While MAC address is typically used for IPv4, and DUID is
typically used for IPv6, either of them can be used in IPv4 and IPv6
reservations in Kea.
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Extend list of allowed characters for the bootfile-option.
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Clients supporting this DHCP option (DHCP option 108, RFC 8925) will
disable its IPv4 network stack for configured number of seconds
and operate in IPv6-only mode.
This option is known to work on iOS 15+ and macOS 12.0.1+.
Example command:
```sh
set service dhcp-server shared-network-name LAN6 subnet 192.168.64.0/24 ipv6-only-preferred 0
```
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Commit a6f82bb484 ("T1748: vbash: beautify tab completion output/line breaks")
added a method to split the help string and insert newlines and leading tabs
in a deterministic way.
This commit cleans up the legacy implementations where leading whitespaces got
counted and added by humans in a try/error method.
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If a parameter is required is determined from the Python string on commit.
This "indicator" is not used consistently and sometimes missing, or added where
it is not required anymore due to Python script improvement/rewrite.
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vyos@vyos# show service dhcp-server
shared-network-name LAN {
subnet 172.18.201.0/24 {
default-router 172.18.201.1
name-server 172.18.201.2
range 0 {
start 172.18.201.101
stop 172.18.201.109
}
vendor-option {
ubiquity {
unifi-controller 172.16.100.1
}
}
}
}
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Since introducing the XML <defaultValue> node it was common, but redundant,
practice to also add a help string indicating which value would be used as
default if the node is unset.
This makes no sense b/c it's duplicated code/value/characters and prone to
error. The node.def scripts should be extended to automatically render the
appropriate default value into the CLI help string.
For e.g. SSH the current PoC renders:
$ cat templates-cfg/service/ssh/port/node.def
multi:
type: txt
help: Port for SSH service (default: 22)
val_help: u32:1-65535; Numeric IP port
...
Not all subsystems are already migrated to get_config_dict() and make use of
the defaults() call - those subsystems need to be migrated, first before the new
default is added to the CLI help.
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Signed-off-by: Georg <georg@lysergic.dev>
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This reverts a part of commit c45e4beadf30accb1838b3bad1f21c2146469bf8.
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shared-network
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This option is mandatory and must be user configurable as it needs to match
on both sides.
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DHCP servers "shared-network" level only makes sense if one can specify
configuration items that can be inherited by individual subnets. This is now
possible for name-servers and the domain-name.
set service dhcp-server shared-network-name LAN domain-name 'vyos.net'
set service dhcp-server shared-network-name LAN name-server '192.0.2.1'
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IPv4 DHCP uses "dns-server" to specify one or more name-servers for a given
pool. In order to use the same CLI syntax this should be renamed to name-server,
which is already the case for DHCPv6.
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vyos@vyos# show service dhcp-server
shared-network-name LAN {
subnet 10.0.0.0/24 {
default-router 10.0.0.1
dns-server 194.145.150.1
lease 88
range 0 {
start 10.0.0.100
stop 10.0.0.200
}
static-route 192.168.10.0/24 {
next-hop 10.0.0.2
}
static-route 192.168.20.0/24 {
router 10.0.0.2
}
}
}
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The format of the CLI specified MAC address was not validated as only addresses
with a colon as seperator are supported. Constraint has been added.
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This replaces the Python script by a bash variant which is much faster as the
Python interpreter does not need to be launched on invocation.
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A pre-defined list of common format strings to be used inside the <format> node
of <valueHelp> is available from [1]. Adjust all currently in use <format> nodes
to re-use the predefined strings over writing them on their own by even
encapsulating the <> signs as < and >.
[1]: https://github.com/vyos/vyatta-cfg/blob/5aec1a0429f2f/etc/bash_completion.d/vyatta-cfg#L515-L566
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Running ISC DHCP server as backend server for multiple pools served to relay
agents requires DHCPd to explicitly listen on give interfaces or a "transit"
subnet declaration facing the network where we receive the DHCPREQ messages on.
This implements a new "listen-address" CLI node, the given address is validated
if it is assigned to the system and upon success, a proper "subnet { }" statement
is added into dhcpd.conf
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Migrate the domain-search node (which occurs three times) to an includable
snippet. Also re-use the fqdn validator to keep the regex patterns to as few
locations as possible.
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A lot of XML code is duplicated (VLAN, interface address) for instance. Such
XML definitions should be moved to feature.xml.i files and then just pulled in
via GCC preprocessor #include definition in e.g. bond or ethernet definitions.
This will give us the ability to single-source repeating node definitions as:
* Interface Address
* Interface Description
* Interface Disable
* VLAN (both vif-s and vif-c)
The .in suffix of the interface-definitions is a marker that those files are
input files to the GCC preprocessor. They will be rendered into proper XML
files in the build directory.
Some node definitions have been reworder to remove escaped double quote
occurances which would have been warned about by the GCC preprocessor.
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