release: 3.12.0

Updates the requirements on [rubocop-rspec](https://github.com/rubocop/rubocop-rspec) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop-rspec/releases)
- [Changelog](https://github.com/rubocop/rubocop-rspec/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop-rspec/compare/v3.7.0...v3.8.0)

---
updated-dependencies:
- dependency-name: rubocop-rspec
  dependency-version: 3.8.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/renovate.json5

@@ -20,6 +20,13 @@
       matchManagers: ["bundler"],
       enabled: false,
     },
+    // Only quarter update since noisy/stable tools
+    {
+      matchPackageNames: [
+        "aquasecurity/trivy",
+      ],
+      schedule: ["* 0-8 1 */3 *"],
+    },
     // Commit message formats
     {
       matchDatasources: ["docker"],
@@ -33,7 +40,7 @@
   customManagers: [
     {
       customType: "regex",
-      fileMatch: ["\.rb$", "^Rakefile$"],
+      managerFilePatterns: ["/.rb$/", "/^Rakefile$/"],
       matchStrings: [
         "renovate: datasource=(?<datasource>.*?) depName=(?<depName>.*?)\\s.*_version = '(?<currentValue>.*)'\\s"
       ]

.github/workflows/cd.yml

@@ -11,7 +11,7 @@ jobs:
   release-dockerimage:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Extract dyndnsd version from tag name
       run: |

.github/workflows/ci.yml

@@ -18,13 +18,12 @@ jobs:
       fail-fast: false
       matrix:
         ruby-version:
-        - '3.0'
         - '3.1'
         - '3.2'
         - '3.3'
         - '3.4'
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: Set up Ruby ${{ matrix.ruby-version }}
       uses: ruby/setup-ruby@v1
       with:
@@ -38,7 +37,7 @@ jobs:
   actionlint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: Check workflow files
       run: |
         echo "::add-matcher::.github/actionlint-matcher.json"
@@ -51,6 +50,6 @@ jobs:
       image: ghcr.io/renovatebot/renovate
       options: --user root
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: Check Renovate config
       run: renovate-config-validator --strict

.github/workflows/vulnscan.yml

@@ -1,10 +1,9 @@
-# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
 ---
 name: vulnscan
 
 on:
   schedule:
-  - cron: '7 4 * * 4'  # weekly on thursday morning
+  - cron: '7 4 1 * *'  # monthly on first day's morning
   workflow_dispatch:
 
 jobs:

.rubocop.yml

@@ -1,4 +1,4 @@
-require:
+plugins:
 - rubocop-rake
 - rubocop-rspec
 

CHANGELOG.md

@@ -1,12 +1,19 @@
 # Changelog
 
-## 3.11.0
+## 3.12.0 (December 4th, 2025)
+
+IMPROVEMENTS:
+
+- regex instead of hosts list can be used for hostname ownership
+
+## 3.11.0 (October 2nd, 2025)
 
 IMPROVEMENTS:
 
 - add Ruby 3.4 support
+- update base of Docker image to Alpine 3.22.1 (from 3.19.0 before)
 
-## 3.10.0
+## 3.10.0 (January 18th, 2024)
 
 IMPROVEMENTS:
 

README.md

@@ -307,6 +307,37 @@ users:
 ```
 
 
+### Matching with a regular expression
+
+Instead of relying on `hosts`, you can use `regex` to employ a regular expression, which is very useful for avoiding having to repeatedly edit the configuration file to register a new host name.
+
+```yaml
+host: "0.0.0.0"
+port: 5354
+username: "dyndnsd"
+group: "dyndnsd"
+db: "/dyndnsd/db.json"
+debug: false
+domain: "dyn.dc-air.home.arpa"
+updater:
+  name: "command_with_bind_zone"
+  params:
+    zone_file: "/nsd/zones/static/dyn.dc-air.home.arpa.zone"
+    command: "doas service nsd reload"
+    ttl: "5m"
+    dns: "ns.dc-air.home.arpa."
+    email_addr: "admin.example.org"
+users:
+  myuser:
+    password: "superhypermegas3kurepassword1234"
+    regex: '^[a-z][0-9]\.dyn\.dc\-air\.home\.arpa$'
+```
+
+However, when using `regex`, `hosts` is simply ignored if defined, so you must choose one or the other. Recommendation: use `regex` for scripts or programs and `hosts` for regular users.
+
+**Note**: Please note that when dyndnsd evaluates the regular expression, the `Regexp::EXTENDED` and `Regexp::IGNORECASE` options are used.
+
+
 ## License
 
 dyndnsd.rb is licensed under the Apache License, Version 2.0. See LICENSE for more information.

Rakefile

@@ -13,10 +13,10 @@ task :solargraph do
 end
 
 # renovate: datasource=github-tags depName=hadolint/hadolint
-hadolint_version = 'v2.12.0'
+hadolint_version = 'v2.14.0'
 
 # renovate: datasource=github-tags depName=aquasecurity/trivy
-trivy_version = 'v0.59.1'
+trivy_version = 'v0.67.0'
 
 namespace :docker do
   ci_image = 'cmur2/dyndnsd:ci'
@@ -69,7 +69,7 @@ end
 namespace :bundle do
   desc 'Check for vulnerabilities with bundler-audit'
   task :audit do
-    sh 'bundler-audit check --ignore GHSA-vvfq-8hwr-qm4m'
+    sh 'bundler-audit check --ignore GHSA-vvfq-8hwr-qm4m' if !RUBY_VERSION.start_with?('3.0')
   end
 end
 

docker/Dockerfile

@@ -1,11 +1,11 @@
-FROM alpine:3.21.2
+FROM alpine:3.22.2
 
 EXPOSE 5353 8080
 
 ARG DYNDNSD_VERSION
 
 RUN apk --no-cache add openssl ca-certificates && \
-    apk --no-cache add ruby ruby-etc ruby-io-console ruby-json ruby-webrick && \
+    apk --no-cache add ruby ruby-webrick && \
     apk --no-cache add --virtual .build-deps linux-headers ruby-dev build-base tzdata && \
     gem install --no-document dyndnsd -v ${DYNDNSD_VERSION} && \
     rm -rf /usr/lib/ruby/gems/*/cache/ && \

docker/ci/Dockerfile

@@ -1,11 +1,11 @@
-FROM alpine:3.21.2
+FROM alpine:3.22.2
 
 EXPOSE 5353 8080
 
 COPY pkg/dyndnsd-*.gem /tmp/dyndnsd.gem
 
 RUN apk --no-cache add openssl ca-certificates && \
-    apk --no-cache add ruby ruby-etc ruby-io-console ruby-json ruby-webrick && \
+    apk --no-cache add ruby ruby-webrick && \
     apk --no-cache add --virtual .build-deps linux-headers ruby-dev build-base tzdata && \
     gem install --no-document /tmp/dyndnsd.gem && \
     rm -rf /usr/lib/ruby/gems/*/cache/ && \

dyndnsd.gemspec

@@ -30,7 +30,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'async', '~> 1.31.0'
   s.add_dependency 'async-dns', '~> 1.3.0'
   s.add_dependency 'base64', '~> 0.2.0' # needed for async
-  s.add_dependency 'logger', '~> 1.6.0'
+  s.add_dependency 'logger', '>= 1.6', '< 1.8'
   s.add_dependency 'metriks'
   s.add_dependency 'opentelemetry-exporter-jaeger', '~> 0.22.0'
   s.add_dependency 'opentelemetry-instrumentation-rack', '~> 0.22.0'
@@ -44,8 +44,8 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rack-test'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec'
-  s.add_development_dependency 'rubocop', '~> 1.71.0'
+  s.add_development_dependency 'rubocop', '~> 1.81.1'
-  s.add_development_dependency 'rubocop-rake', '~> 0.6.0'
+  s.add_development_dependency 'rubocop-rake', '~> 0.7.1'
-  s.add_development_dependency 'rubocop-rspec', '~> 3.4.0'
+  s.add_development_dependency 'rubocop-rspec', '~> 3.8.0'
-  s.add_development_dependency 'solargraph', '~> 0.49.0'
+  s.add_development_dependency 'solargraph', '~> 0.55.0'
 end

lib/dyndnsd.rb

@@ -138,7 +138,7 @@ module Dyndnsd
     # @param params [Hash{String => String}]
     # @return [Array<String>]
     def extract_v4_and_v6_address(params)
-      return [] if !(params['myip'])
+      return [] if !params['myip']
       begin
         IPAddr.new(params['myip'], Socket::AF_INET)
         IPAddr.new(params['myip6'], Socket::AF_INET6)
@@ -207,7 +207,7 @@ module Dyndnsd
       params = Rack::Utils.parse_query(env['QUERY_STRING'])
 
       # require hostname parameter
-      return [422, {'X-DynDNS-Response' => 'hostname_missing'}, []] if !(params['hostname'])
+      return [422, {'X-DynDNS-Response' => 'hostname_missing'}, []] if !params['hostname']
 
       hostnames = params['hostname'].split(',')
 
@@ -218,9 +218,22 @@ module Dyndnsd
       # we can trust this information since user was authorized by middleware
       user = env['REMOTE_USER']
 
-      # check for hostnames that the user does not own
+      if @users[user].key?('regex')
-      forbidden_hostnames = hostnames - @users[user].fetch('hosts', [])
+        pattern = @users[user].fetch('regex')
-      return [422, {'X-DynDNS-Response' => 'host_forbidden'}, []] if forbidden_hostnames.any?
+        begin
+          regex = Regexp.new(pattern, Regexp::IGNORECASE | Regexp::EXTENDED)
+        rescue RegexpError => e
+          Dyndnsd.logger.warn "Invalid regex pattern '#{pattern}': #{e.message}"
+          return [422, {'X-DynDNS-Response' => 'host_forbidden'}, []]
+        end
+        # check for hostnames that match the regex
+        matches = hostnames.any? { |str| regex.match?(str) }
+        return [422, {'X-DynDNS-Response' => 'host_forbidden'}, []] if !matches
+      else
+        # check for hostnames that the user does not own
+        forbidden_hostnames = hostnames - @users[user].fetch('hosts', [])
+        return [422, {'X-DynDNS-Response' => 'host_forbidden'}, []] if forbidden_hostnames.any?
+      end
 
       if params['offline'] == 'YES'
         myips = []

lib/dyndnsd/updater/zone_transfer_server.rb

@@ -89,7 +89,7 @@ module Dyndnsd
       # @return [Array{Array{Object}}]
       def self.parse_endpoints(endpoint_list)
         endpoint_list.map { |addr_string| addr_string.split('@') }
-                     .map { |addr_parts| [addr_parts[0], addr_parts[1].to_i || 53] }
+                     .map { |addr_parts| [addr_parts[0], addr_parts[1]&.to_i || 53] }
                      .map { |addr| [:tcp, :udp].map { |type| [type] + addr } }
                      .flatten(1)
       end

lib/dyndnsd/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Dyndnsd
-  VERSION = '3.9.2'
+  VERSION = '3.12.0'
 end

spec/dyndnsd/daemon_spec.rb

@@ -18,6 +18,10 @@ describe Dyndnsd::Daemon do
         },
         'test2' => {
           'password' => 'ihavenohosts'
+        },
+        'test3' => {
+          'password' => 'superhypermegas3kurepassword1234',
+          'regex' => '^[a-z0-9]+-test3\.example\.org$'
         }
       }
     }
@@ -74,6 +78,22 @@ describe Dyndnsd::Daemon do
     expect(last_response.body).to eq("good 2001:db8::1\ngood 2001:db8::1")
   end
 
+  it 'supports regex matches for hostnames' do
+    authorize 'test3', 'superhypermegas3kurepassword1234'
+
+    get '/nic/update?hostname=abc123-test3.example.org&myip=1.2.3.4'
+    expect(last_response).to be_ok
+    expect(last_response.body).to eq('good 1.2.3.4')
+
+    get '/nic/update?hostname=foo-test3.example.org,bar-test3.example.org&myip=2001:db8::1'
+    expect(last_response).to be_ok
+    expect(last_response.body).to eq("good 2001:db8::1\ngood 2001:db8::1")
+
+    get '/nic/update?hostname=abc123.example.org'
+    expect(last_response).to be_ok
+    expect(last_response.body).to eq('nohost')
+  end
+
   it 'rejects request if one hostname is invalid' do
     authorize 'test', 'secret'
 
@@ -120,6 +140,10 @@ describe Dyndnsd::Daemon do
     get '/nic/update?hostname=foo.example.org,notmyhost.example.org'
     expect(last_response).to be_ok
     expect(last_response.body).to eq('nohost')
+
+    get '/nic/update?hostname=abc123-test3.example.org'
+    expect(last_response).to be_ok
+    expect(last_response.body).to eq('nohost')
   end
 
   it 'updates a host on IP change' do