luci-mod-network: add DHCPv6 NTP server config helper to interfaces

Appears under DHCPv6-service when set to 'server' or 'hybrid'.

Option 'ntp' is serviced by odhcpd. It sends a DHCPv6 NTP Server option
56 for each 'ntp' list entry.

Once uci loads the system section, it provides suggestion presets of
system configured upstream NTP servers, and the LAN IP(v6) of the router
which are then statically configured by the user.

It would make more sense if odhcpd fetches them directly.
Alas, it does not (yet).

Signed-off-by: Paul Donald <newtwen+github@gmail.com>

1 files changed, 23 insertions, 1 deletions

diff --git a/modules/luci-mod-network/htdocs/luci-static/resources/view/network/interfaces.js b/modules/luci-mod-network/htdocs/luci-static/resources/view/network/interfaces.js
index fd7487b3de..b826ccb094 100644
--- a/modules/luci-mod-network/htdocs/luci-static/resources/view/network/interfaces.js
+++ b/modules/luci-mod-network/htdocs/luci-static/resources/view/network/interfaces.js
@@ -502,7 +502,8 @@ return view.extend({
 		s.load = function() {
 			return Promise.all([
 				network.getNetworks(),
-				firewall.getZones()
+				firewall.getZones(),
+				uci.load('system')
 			]).then(L.bind(function(data) {
 				this.networks = data[0];
 				this.zones = data[1];
@@ -988,6 +989,27 @@ return view.extend({
 					so.depends('dhcpv6', 'server');
 					so.depends({ dhcpv6: 'hybrid', master: '0' });
 
+					//This is a DHCPv6 specific odhcpd setting
+					so = ss.taboption('ipv6', form.DynamicList, 'ntp', _('NTP Servers'),
+						_('DHCPv6 option 56. %s.', 'DHCPv6 option 56. RFC5908 link').format('<a href="%s" target="_blank">RFC5908</a>').format('https://www.rfc-editor.org/rfc/rfc5908#section-4'));
+					so.datatype = 'host(0)';
+					for(var x of uci.get('system', 'ntp', 'server') || '') {
+						so.value(x);
+					}
+					var lan_net = this.networks.filter(function(n) { return n.getName() == 'lan' })[0];
+					// If ntpd is set up, suggest our IP(v6) also
+					if(uci.get('system', 'ntp', 'enable_server')) {
+						lan_net.getIPAddrs().forEach(function(i4) {
+							so.value(i4.split('/')[0]);
+						});
+						lan_net.getIP6Addrs().forEach(function(i6) {
+							so.value(i6.split('/')[0]);
+						});
+					}
+					so.optional = true;
+					so.rmempty = true;
+					so.depends('dhcpv6', 'server');
+					so.depends({ dhcpv6: 'hybrid', master: '0' });
 
 					so = ss.taboption('ipv6', cbiRichListValue, 'ndp', _('<abbr title="Neighbour Discovery Protocol">NDP</abbr>-Proxy'),
 						_('Configures the operation mode of the NDP proxy service on this interface.'));