feature: the name server's domains have wan.local_fqdn and dns.secondary as their name servers, and a site with dns router gets records of the router's public, internal or external address.

debian-package/src/usr/sbin/vpn-router-site

@@ -3,7 +3,9 @@
 
 A site has a name, which also names its folder in /var/lib/vpn-router/sites, host names, a port, the interfaces whose
 firewall opens it, TLS (none, acme, ca with --ca, or file with --certificate and --key), the file served for a folder,
-whether any path without a file is served that file of the site (--spa), and the group whose members change its files.
+whether any path without a file is served that file of the site (--spa), the group whose members change its files, and
+who serves the records of its host names (--dns user, elsewhere, or router, the router's name server, with the router's
+address of --dns-address).
 A change is applied by restarting vpn-router-setup without waiting for it. The answer is text for people on standard
 output, and a failure is a message on standard error. With --json the answer is JSON on standard output, and a failure
 is {"error": ...} there too. The exit status says what failed: 2 the request is invalid, 3 the site does not exist, 4
@@ -17,7 +19,8 @@ the site exists, 1 anything else. -h or --help shows the commands and their opti
 
   options: [--host H ...] [--no-hosts] [--port P] [--listen internal|external|both] [--tls none|acme|ca|file]
            [--ca NAME] [--certificate FILE] [--key FILE] [--index FILE] [--spa | --no-spa]
-           [--enabled | --no-enabled] [--editors GROUP]
+           [--enabled | --no-enabled] [--editors GROUP] [--dns user|router]
+           [--dns-address public|internal|external]
 """
 
 import argparse
@@ -73,6 +76,9 @@ def parse(argv):
                              'path without a file')
             sub.add_argument('--enabled', action=argparse.BooleanOptionalAction, help='serve the site')
             sub.add_argument('--editors', metavar='GROUP', help="the group whose members change the files; '' for none")
+            sub.add_argument('--dns', choices=vpnrouter_sites.DNS, help='who serves the records of the host names')
+            sub.add_argument('--dns-address', choices=vpnrouter_sites.DNS_ADDRESSES,
+                             help="the router's address in the records of dns router")
         if command == 'remove':
             sub.add_argument('--content', action='store_true', help='remove the site\'s folder too')
     return parser.parse_args(argv)
@@ -82,7 +88,8 @@ def values_of(options):
     """The settings the options give."""
     values = {key: getattr(options, option) for key, option in (('port', 'port'), ('listen', 'listen'), ('tls', 'tls'),
                                                                ('ca', 'ca'), ('index_file', 'index'), ('spa', 'spa'),
-                                                               ('enabled', 'enabled'), ('editors', 'editors'))
+                                                               ('enabled', 'enabled'), ('editors', 'editors'),
+                                                               ('dns', 'dns'), ('dns_address', 'dns_address'))
               if getattr(options, option) is not None}
     if options.no_hosts:
         values['hosts'] = []
@@ -120,9 +127,10 @@ def text_of(answer):
     sites = answer['sites'] if 'sites' in answer else [answer]
     if not sites:
         return 'no sites'
-    head = ('SITE', 'ENABLED', 'HOSTS', 'PORT', 'LISTEN', 'TLS', 'EDITORS')
+    head = ('SITE', 'ENABLED', 'HOSTS', 'PORT', 'LISTEN', 'TLS', 'EDITORS', 'DNS')
     rows = [(site['name'], 'yes' if site['enabled'] else 'no', ', '.join(site['hosts']) or '*', str(site['port']),
-             site['listen'], site['tls'] + (f' {site["ca"]}' if site['tls'] == 'ca' else ''), site['editors'] or '-')
+             site['listen'], site['tls'] + (f' {site["ca"]}' if site['tls'] == 'ca' else ''), site['editors'] or '-',
+             site['dns'] + (f' {site["dns_address"]}' if site['dns'] == 'router' else ''))
             for site in sites]
     widths = [max(len(row[column]) for row in (head, *rows)) for column in range(len(head))]
     return '\n'.join('  '.join(cell.ljust(width) for cell, width in zip(row, widths)).rstrip() for row in (head, *rows))