From 02a93bca500acac3d051ac6a541e70905f1934e9 Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Mon, 25 Jan 2016 17:54:38 +0100
Subject: [PATCH] luci-mod-admin-full: map DHCPv6 DUIDs to MACs

Map DUIDs to their corresponding MAC addresses in order to correlate them with
IPv4 information. This is useful to e.g. identify IPv6 hosts which do not send
a name.

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
---
 .../view/admin_network/lease_status.htm       | 28 +++++++++++++++++--
 .../luasrc/view/admin_status/index.htm        | 26 +++++++++++++++--
 2 files changed, 50 insertions(+), 4 deletions(-)

diff --git a/modules/luci-mod-admin-full/luasrc/view/admin_network/lease_status.htm b/modules/luci-mod-admin-full/luasrc/view/admin_network/lease_status.htm
index ab8e73257..f7787dd1e 100644
--- a/modules/luci-mod-admin-full/luasrc/view/admin_network/lease_status.htm
+++ b/modules/luci-mod-admin-full/luasrc/view/admin_network/lease_status.htm
@@ -1,4 +1,18 @@
 <script type="text/javascript">//<![CDATA[
+	function duid2mac(duid) {
+		// DUID-LLT / Ethernet
+		if (duid.length === 28 && duid.substr(0, 8) === '00010001')
+			return duid.substr(16).replace(/(..)(?=..)/g, '$1:').toUpperCase();
+
+		// DUID-LL / Ethernet
+		if (duid.length === 24 && duid.substr(0, 8) === '00030001')
+			return duid.substr(8).replace(/(..)(?=..)/g, '$1:').toUpperCase();
+
+		return null;
+	}
+
+	var hosts = <%=luci.http.write_json(luci.sys.net.host_hints())%>;
+
 	XHR.poll(5, '<%=url('admin/network/dhcplease_status')%>', null,
 		function(x, st)
 		{
@@ -67,7 +81,17 @@
 					var tr = tb6.insertRow(-1);
 						tr.className = 'cbi-section-table-row cbi-rowstyle-' + ((i % 2) + 1);
 
-					tr.insertCell(-1).innerHTML = st[1][i].hostname ? st[1][i].hostname : '?';
+					var host = hosts[duid2mac(st[1][i].duid)];
+					if (host)
+						tr.insertCell(-1).innerHTML = String.format(
+							'<div style="max-width:200px;overflow:hidden;text-overflow:ellipsis">%s</div>',
+							((host.name && (host.ipv4 || host.ipv6))
+								? '%h (%s)'.format(host.name, host.ipv4 || host.ipv6)
+								: '%h'.format(host.name || host.ipv4 || host.ipv6)).nobr()
+						);
+					else
+						tr.insertCell(-1).innerHTML = st[1][i].hostname ? st[1][i].hostname : '?';
+
 					tr.insertCell(-1).innerHTML = st[1][i].ip6addr;
 					tr.insertCell(-1).innerHTML = st[1][i].duid;
 					tr.insertCell(-1).innerHTML = timestr;
@@ -106,7 +130,7 @@
 	<legend><%:Active DHCPv6 Leases%></legend>
 	<table class="cbi-section-table" id="lease6_status_table">
 		<tr class="cbi-section-table-titles">
-			<th class="cbi-section-table-cell"><%:Hostname%></th>
+			<th class="cbi-section-table-cell"><%:Host%></th>
 			<th class="cbi-section-table-cell"><%:IPv6-Address%></th>
 			<th class="cbi-section-table-cell"><%:DUID%></th>
 			<th class="cbi-section-table-cell"><%:Leasetime remaining%></th>
diff --git a/modules/luci-mod-admin-full/luasrc/view/admin_status/index.htm b/modules/luci-mod-admin-full/luasrc/view/admin_status/index.htm
index a37982e1d..8bfc61b99 100644
--- a/modules/luci-mod-admin-full/luasrc/view/admin_status/index.htm
+++ b/modules/luci-mod-admin-full/luasrc/view/admin_status/index.htm
@@ -144,6 +144,18 @@
 		return s;
 	}
 
+	function duid2mac(duid) {
+		// DUID-LLT / Ethernet
+		if (duid.length === 28 && duid.substr(0, 8) === '00010001')
+			return duid.substr(16).replace(/(..)(?=..)/g, '$1:').toUpperCase();
+
+		// DUID-LL / Ethernet
+		if (duid.length === 24 && duid.substr(0, 8) === '00030001')
+			return duid.substr(8).replace(/(..)(?=..)/g, '$1:').toUpperCase();
+
+		return null;
+	}
+
 	var npoll = 1;
 	var hosts = <%=luci.http.write_json(luci.sys.net.host_hints())%>;
 
@@ -339,7 +351,17 @@
 					var tr = ls6.rows[0].parentNode.insertRow(-1);
 						tr.className = 'cbi-section-table-row cbi-rowstyle-' + ((i % 2) + 1);
 
-					tr.insertCell(-1).innerHTML = info.leases6[i].hostname ? info.leases6[i].hostname : '?';
+					var host = hosts[duid2mac(info.leases6[i].duid)];
+					if (host)
+						tr.insertCell(-1).innerHTML = String.format(
+							'<div style="max-width:200px;overflow:hidden;text-overflow:ellipsis">%s</div>',
+							((host.name && (host.ipv4 || host.ipv6))
+								? '%h (%s)'.format(host.name, host.ipv4 || host.ipv6)
+								: '%h'.format(host.name || host.ipv4 || host.ipv6)).nobr()
+						);
+					else
+						tr.insertCell(-1).innerHTML = info.leases6[i].hostname ? info.leases6[i].hostname : '?';
+
 					tr.insertCell(-1).innerHTML = info.leases6[i].ip6addr;
 					tr.insertCell(-1).innerHTML = info.leases6[i].duid;
 					tr.insertCell(-1).innerHTML = timestr;
@@ -671,7 +693,7 @@
 
 	<table class="cbi-section-table" id="lease6_status_table">
 		<tr class="cbi-section-table-titles">
-			<th class="cbi-section-table-cell"><%:Hostname%></th>
+			<th class="cbi-section-table-cell"><%:Host%></th>
 			<th class="cbi-section-table-cell"><%:IPv6-Address%></th>
 			<th class="cbi-section-table-cell"><%:DUID%></th>
 			<th class="cbi-section-table-cell"><%:Leasetime remaining%></th>
-- 
2.25.1