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ntopng/scripts/lua/network_details.lua
Simone Mainardi 85c5beb545 Implements alerts on a per-interface per-vlan basis 
Interfaces were handled globally before this commit. Now
alerts can be configured per-interface. So for example alerts
for the same host 193.168.2.1 can be handled differently on multiple interfaces.

Old alerts configured should be automatically migrated thanks to script startup.lua

This commits also paves the way to introduce stateful alerts in the professional version
2016-07-27 22:10:17 +02:00

370 lines
15 KiB
Lua
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--
-- (C) 2013-16 - ntop.org
--
dirs = ntop.getDirs()
package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
if(ntop.isPro()) then
package.path = dirs.installdir .. "/pro/scripts/lua/modules/?.lua;" .. package.path
require "snmp_utils"
end
require "lua_utils"
require "graph_utils"
require "alert_utils"
local network = _GET["network"]
local page = _GET["page"]
interface.select(ifname)
ifstats = aggregateInterfaceStats(interface.getStats())
ifId = ifstats.id
local network_name = ntop.getNetworkNameById(tonumber(network))
local network_vlan = tonumber(_GET["vlan"])
if network_vlan == nil then network_vlan = 0 end
sendHTTPHeader('text/html; charset=iso-8859-1')
ntop.dumpFile(dirs.installdir .. "/httpdocs/inc/header.inc")
dofile(dirs.installdir .. "/scripts/lua/inc/menu.lua")
if(network == nil) then
print("<div class=\"alert alert alert-danger\"><img src=".. ntop.getHttpPrefix() .. "/img/warning.png> Network parameter is missing (internal error ?)</div>")
return
end
rrdname = dirs.workingdir .. "/" .. ifId .. "/subnetstats/" .. getPathFromKey(network_name) .. "/bytes.rrd"
if(not ntop.exists(rrdname)) then
print("<div class=\"alert alert alert-danger\"><img src=".. ntop.getHttpPrefix() .. "/img/warning.png> No available stats for network "..network_name.."</div>")
return
end
--[[
Process form data
--]]
if(_GET["flow_rate_alert_threshold"] ~= nil and _GET["csrf"] ~= nil) then
if (tonumber(_GET["flow_rate_alert_threshold"]) ~= nil) then
page = "config"
local val = ternary(_GET["flow_rate_alert_threshold"] ~= "0", _GET["flow_rate_alert_threshold"], "25")
ntop.setCache('ntopng.prefs.'..network_name..':'..tostring(network_vlan)..'.flow_rate_alert_threshold', val)
-- interface.loadHostAlertPrefs(network_name, network_vlan) TODO: decide to implement it for networks
end
end
if(_GET["syn_alert_threshold"] ~= nil and _GET["csrf"] ~= nil) then
if (tonumber(_GET["syn_alert_threshold"]) ~= nil) then
page = "config"
val = ternary(_GET["syn_alert_threshold"] ~= "0", _GET["syn_alert_threshold"], "10")
ntop.setCache('ntopng.prefs.'..network_name..':'..tostring(network_vlan)..'.syn_alert_threshold', val)
-- interface.loadHostAlertPrefs(network_name, network_vlan) TODO: decide to implement it for networks
end
end
if(_GET["flows_alert_threshold"] ~= nil and _GET["csrf"] ~= nil) then
if (tonumber(_GET["flows_alert_threshold"]) ~= nil) then
page = "config"
val = ternary(_GET["flows_alert_threshold"] ~= "0", _GET["flows_alert_threshold"], "32768")
ntop.setCache('ntopng.prefs.'..network_name..':'..tostring(network_vlan)..'.flows_alert_threshold', val)
-- interface.loadHostAlertPrefs(network_name, network_vlan) TODO: decide to implement it for networks
end
end
--[[
Create Menu Bar with buttons
--]]
local nav_url = ntop.getHttpPrefix().."/lua/network_details.lua?network="..tonumber(network)
print [[
<div class="bs-docs-example">
<nav class="navbar navbar-default" role="navigation">
<div class="navbar-collapse collapse">
<ul class="nav navbar-nav">
]]
print("<li><a href=\"#\">Network: "..network_name.."</A> </li>")
if(page == "historical") then
print("\n<li class=\"active\"><a href=\"#\"><i class='fa fa-area-chart fa-lg'></i></a></li>\n")
else
print("\n<li><a href=\""..nav_url.."&page=historical\"><i class='fa fa-area-chart fa-lg'></i></a></li>")
end
if(page == "alerts") then
print("\n<li class=\"active\"><a href=\"#\"><i class=\"fa fa-warning fa-lg\"></i></a></li>\n")
else
print("\n<li><a href=\""..nav_url.."&page=alerts\"><i class=\"fa fa-warning fa-lg\"></i></a></li>")
end
if(network ~= nil) then
if(page == "config") then
print("\n<li class=\"active\"><a href=\"#\"><i class=\"fa fa-cog fa-lg\"></i></a></li>\n")
else
print("\n<li><a href=\""..nav_url.."&page=config\"><i class=\"fa fa-cog fa-lg\"></i></a></li>")
end
end
print [[
<li><a href="javascript:history.go(-1)"><i class='fa fa-reply'></i></a></li>
</ul>
</div>
</nav>
</div>
]]
--[[
Selectively render information pages
--]]
if page == "historical" then
if(_GET["rrd_file"] == nil) then
rrdfile = "bytes.rrd"
else
rrdfile=_GET["rrd_file"]
end
host_url = ntop.getHttpPrefix()..'/lua/network_details.lua?ifname='..ifId..'&network='..network..'&page=historical'
drawRRD(ifId, 'net:'..network_name, rrdfile, _GET["graph_zoom"], host_url, 1, _GET["epoch"], nil, makeTopStatsScriptsArray())
elseif (page == "config") then
if(isAdministrator()) then
trigger_alerts = _GET["trigger_alerts"]
if(trigger_alerts ~= nil) then
if(trigger_alerts == "true") then
ntop.delHashCache("ntopng.prefs.alerts", network_name)
else
ntop.setHashCache("ntopng.prefs.alerts", network_name, trigger_alerts)
end
end
end
local flow_rate_alter_thresh = ntop.getCache('ntopng.prefs.'..network_name..':'..tostring(network_vlan)..'.flow_rate_alert_threshold')
local syn_alert_thresh = ntop.getCache('ntopng.prefs.'..network_name..':'..tostring(network_vlan)..'.syn_alert_threshold')
local flows_alert_thresh = ntop.getCache('ntopng.prefs.'..network_name..':'..tostring(network_vlan)..'.flows_alert_threshold')
if (flow_rate_alter_thresh == nil or flow_rate_alter_thresh == "") then flow_rate_alter_thresh = 25 end
if (syn_alert_thresh == nil or syn_alert_thresh == "") then syn_alert_thresh = 10 end
if (flows_alert_thresh == nil or flows_alert_thresh == "") then flows_alert_thresh = 32768 end
print("<table class=\"table table-striped table-bordered\">\n")
print("<tr><th width=250>Network Flow Alert Threshold</th>\n")
print [[<td>]]
print[[<form class="form-inline" style="margin-bottom: 0px;">
<input type="hidden" name="network" value="]] print(network) print [[">]]
print('<input id="csrf" name="csrf" type="hidden" value="'..ntop.getRandomCSRFValue()..'" />\n')
print('<input type="number" name="flow_rate_alert_threshold" placeholder="" min="0" step="1" max="100000" value="')
print(tostring(flow_rate_alter_thresh))
print [["></input>
&nbsp;<button type="submit" style="position: absolute; margin-top: 0; height: 26px" class="btn btn-default btn-xs">Save</button>
</form>
<small>
Max number of new flows/sec over which the network is considered to be flooding (<b>Experimental</b>). Default: 25.<br>
</small>]]
print[[
</td></tr>
]]
print("<tr><th width=250>Network SYN Alert Threshold</th>\n")
print [[<td>]]
print[[<form class="form-inline" style="margin-bottom: 0px;">
<input type="hidden" name="network" value="]]
print(network)
print [[">]]
print('<input id="csrf" name="csrf" type="hidden" value="'..ntop.getRandomCSRFValue()..'" />\n')
print [[<input type="number" name="syn_alert_threshold" placeholder="" min="0" step="5" max="100000" value="]]
print(tostring(syn_alert_thresh))
print [["></input>
&nbsp;<button type="submit" style="position: absolute; margin-top: 0; height: 26px" class="btn btn-default btn-xs">Save</button>
</form>
<small>
Max number of sent TCP SYN packets/sec over which the network is considered to be flooding (<b>Experimental</b>). Default: 10.<br>
</small>]]
print[[
</td></tr>
]]
print("<tr><th width=250>Network Flows Threshold</th>\n")
print [[<td>]]
print[[<form class="form-inline" style="margin-bottom: 0px;">
<input type="hidden" name="network" value="]]
print(network)
print [[">]]
print('<input id="csrf" name="csrf" type="hidden" value="'..ntop.getRandomCSRFValue()..'" />\n')
print [[<input type="number" name="flows_alert_threshold" placeholder="" min="0" step="1" max="100000" value="]]
print(tostring(flows_alert_thresh))
print [["></input>
&nbsp;<button type="submit" style="position: absolute; margin-top: 0; height: 26px" class="btn btn-default btn-xs">Save</button>
</form>
<small>
Max number of flows over which the network is considered to be flooding (<b>Experimental</b>). Default: 32768.<br>
</small>]]
print[[
</td></tr>
]]
local suppressAlerts = ntop.getHashCache("ntopng.prefs.alerts", network_name)
if((suppressAlerts == "") or (suppressAlerts == nil) or (suppressAlerts == "true")) then
alerts_checked = 'checked="checked"'
alerts_value = "false" -- Opposite
else
alerts_checked = ""
alerts_value = "true" -- Opposite
end
print [[
<tr><th>Network Alerts</th><td nowrap>
<form id="alert_prefs" class="form-inline" style="margin-bottom: 0px;">
<input type="hidden" name="tab" value="alerts_preferences">
<input type="hidden" name="network" value="]]
print(network)
print('"><input type="hidden" name="trigger_alerts" value="'..alerts_value..'"><input type="checkbox" value="1" '..alerts_checked..' onclick="this.form.submit();"> <i class="fa fa-exclamation-triangle fa-lg"></i> Trigger alerts for network '..network_name..'</input>')
print('<input id="csrf" name="csrf" type="hidden" value="'..ntop.getRandomCSRFValue()..'" />\n')
print('<input type="hidden" name="page" value="config">')
print('</form>')
print('</td>')
print [[</tr>]]
print("</table>")
elseif(page == "alerts") then
local tab = _GET["tab"]
local re_arm_minutes = nil
if(tab == nil) then tab = alerts_granularity[1][1] end
print('<ul class="nav nav-tabs">')
for _,e in pairs(alerts_granularity) do
local tab_id = e[1]
local tab_label = e[2]
if(tab_id == tab) then print("\t<li class=active>") else print("\t<li>") end
print("<a href=\""..ntop.getHttpPrefix().."/lua/network_details.lua?network="..network.."&vlan="..network_vlan.."&page=alerts&tab="..tab_id.."\">"..tab_label.."</a></li>\n")
end
vals = { }
alerts = ""
to_save = false
if((_GET["to_delete"] ~= nil) and (_GET["SaveAlerts"] == nil)) then
delete_alert_configuration(network_name, ifname)
alerts = nil
else
for k,_ in pairs(network_alert_functions_description) do
value = _GET["value_"..k]
operator = _GET["operator_"..k]
if((value ~= nil) and (operator ~= nil)) then
--io.write("\t"..k.."\n")
to_save = true
value = tonumber(value)
if(value ~= nil) then
if(alerts ~= "") then alerts = alerts .. "," end
alerts = alerts .. k .. ";" .. operator .. ";" .. value
else
if ntop.isPro() then ntop.withdrawNagiosAlert(network_name, tab, k, "OK, alarm not installed") end
end
end
end
if(to_save) then
if(alerts == "") then
ntop.delHashCache(get_alerts_hash_name(tab, ifname), network_name)
else
ntop.setHashCache(get_alerts_hash_name(tab, ifname), network_name, alerts)
end
else
alerts = ntop.getHashCache(get_alerts_hash_name(tab, ifname), network_name)
end
if _GET["re_arm_minutes"] then
ntop.setHashCache(get_re_arm_alerts_hash_name(tab),
"ifid_"..tostring(ifId).."_"..network_name,
_GET["re_arm_minutes"])
end
re_arm_minutes = ntop.getHashCache(get_re_arm_alerts_hash_name(tab),
"ifid_"..tostring(ifId).."_"..network_name)
if not re_arm_minutes then re_arm_minutes="" end
end
if(alerts ~= nil) then
--print(alerts)
--tokens = string.split(alerts, ",")
tokens = split(alerts, ",")
--print(tokens)
if(tokens ~= nil) then
for _,s in pairs(tokens) do
t = string.split(s, ";")
--print("-"..t[1].."-")
if(t ~= nil) then vals[t[1]] = { t[2], t[3] } end
end
end
end
print [[
<table id="user" class="table table-bordered table-striped" style="clear: both"> <tbody>
<tr><th width=20%>Alert Function</th><th>Threshold</th></tr>
<form>
<input type=hidden name=page value=alerts>
]]
print('<input id="csrf" name="csrf" type="hidden" value="'..ntop.getRandomCSRFValue()..'" />\n')
print("<input type=hidden name=network value=\""..network.."\">\n")
print("<input type=hidden name=tab value="..tab..">\n")
for k,v in pairsByKeys(network_alert_functions_description, asc) do
print("<tr><th>"..k.."</th><td>\n")
print("<select name=operator_".. k ..">\n")
if((vals[k] ~= nil) and (vals[k][1] == "gt")) then print("<option selected=\"selected\"") else print("<option ") end
print("value=\"gt\">&gt;</option>\n")
if((vals[k] ~= nil) and (vals[k][1] == "eq")) then print("<option selected=\"selected\"") else print("<option ") end
print("value=\"eq\">=</option>\n")
if((vals[k] ~= nil) and (vals[k][1] == "lt")) then print("<option selected=\"selected\"") else print("<option ") end
print("value=\"lt\">&lt;</option>\n")
print("</select>\n")
print("<input type=text name=\"value_"..k.."\" value=\"")
if(vals[k] ~= nil) then print(vals[k][2]) end
print("\">\n\n")
print("<br><small>"..v.."</small>\n")
print("</td></tr>\n")
end
print [[
<tr><td colspan=2 style="text-align: left; white-space: nowrap;" ></td></tr>
<tr>
<td style="text-align: left; white-space: nowrap;" ><b>Re-arm minutes</b></td>
<td>
<input type="number" name="re_arm_minutes" style="width: 50px;" value=]] print(tostring(re_arm_minutes)) print[[><br>
<small>The re-arm is the dead time between one alert generation and the potential generation of the next alert of the same kind. </small>
</td>
</tr>
<tr><th colspan=2 style="text-align: center; white-space: nowrap;" >
<input type="submit" class="btn btn-primary" name="SaveAlerts" value="Save Configuration">
<a href="#myModal" role="button" class="btn" data-toggle="modal">[ <i type="submit" class="fa fa-trash-o"></i> Delete All Network Configured Alerts ]</button></a>
<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">X</button>
<h3 id="myModalLabel">Confirm Action</h3>
</div>
<div class="modal-body">
<p>Do you really want to delete all configured alerts for network ]] print(network_name) print [[?</p>
</div>
<div class="modal-footer">
<form class=form-inline style="margin-bottom: 0px;" method=get action="#"><input type=hidden name=to_delete value="__all__">
]]
print('<input id="csrf" name="csrf" type="hidden" value="'..ntop.getRandomCSRFValue()..'" />\n')
print [[ <button class="btn btn-default" data-dismiss="modal" aria-hidden="true">Close</button>
<button class="btn btn-primary" type="submit">Delete All</button>
</div>
</form>
</div>
</div>
</th> </tr>
</tbody> </table>
]]
end
dofile(dirs.installdir .. "/scripts/lua/inc/footer.lua")
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