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luci-base: luci.tools.status: add host_hints to DHCPv6 leases

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Attempt to derive a MAC from the DHCPv6 lease DUID and use it to look up
a host hint. If a hint is found, add it to the lease information.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
This commit is contained in:
Jo-Philipp Wich 2018-06-28 09:32:16 +02:00
parent ccbb17d260
commit c61c5deac4
1 changed files with 32 additions and 0 deletions
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32
modules/luci-base/luasrc/tools/status.lua
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@ -6,9 +6,25 @@ module("luci.tools.status", package.seeall)
local uci = require "luci.model.uci".cursor()
local ipc = require "luci.ip"
local function duid_to_mac(duid)
local b1, b2, b3, b4, b5, b6
-- DUID-LLT / Ethernet
if type(duid) == "string" and #duid == 28 then
b1, b2, b3, b4, b5, b6 = duid:match("^00010001(%x%x)(%x%x)(%x%x)(%x%x)(%x%x)(%x%x)%x%x%x%x%x%x%x%x$")
-- DUID-LL / Ethernet
elseif type(duid) == "string" and #duid == 20 then
b1, b2, b3, b4, b5, b6 = duid:match("^00030001(%x%x)(%x%x)(%x%x)(%x%x)(%x%x)(%x%x)$")
end
return b1 and ipc.checkmac(table.concat({ b1, b2, b3, b4, b5, b6 }, ":"))
end
local function dhcp_leases_common(family)
local rv = { }
local nfs = require "nixio.fs"
local sys = require "luci.sys"
local leasefile = "/tmp/dhcp.leases"
uci:foreach("dhcp", "dnsmasq",
@ -87,6 +103,22 @@ local function dhcp_leases_common(family)
fd:close()
end
if family == 6 then
local _, lease
local hosts = sys.net.host_hints()
for _, lease in ipairs(rv) do
local mac = duid_to_mac(lease.duid)
local host = mac and hosts[mac]
if host then
if not lease.name then
lease.host_hint = host.name or host.ipv4 or host.ipv6
elseif host.name and lease.hostname ~= host.name then
lease.host_hint = host.name
end
end
end
end
return rv
end