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--
-- (C) 2014-15-15 - ntop.org
--
dirs = ntop.getDirs()
package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
require "lua_utils"
sendHTTPHeader('application/json')
-- Default value
local debug = false
interface.select(ifname)
ifstats = interface.getStats()
max_num_links = 32
max_num_hosts = 8
aggregation = "ndpi"
compared_hosts = {}
compared_hosts_size = 0;
if(debug) then io.write("==== hosts_compared_sankey ====\n") end
hosts = _GET["hosts"]
if(debug) then io.write("Host:"..hosts.."\n") end
if (_GET["hosts"] ~= nil) then
compared_hosts, compared_hosts_size = getHostCommaSeparatedList(_GET["hosts"])
for k,v in pairs(compared_hosts) do
if(debug) then io.write(k .. '-'.. v.."\n") end
end
if (compared_hosts_size >= 2) then
if(_GET["aggregation"] ~= nil) then
aggregation = _GET["aggregation"]
end
-- 1. Find all flows between compared hosts
flows_stats = interface.getFlowsInfo(nil, {detailedResults=true})
flows_stats = flows_stats["flows"]
links = {}
links_size = 0
ndpi = {}
ndpi_size = compared_hosts_size
l4 = {}
l4_size = compared_hosts_size
ports = {}
ports_size = compared_hosts_size
for key, value in ipairs(flows_stats) do
cli_key = hostinfo2hostkey(flows_stats[key],"cli",ifstats.iface_vlan)
srv_key = hostinfo2hostkey(flows_stats[key],"srv",ifstats.iface_vlan)
if (debug) then io.write(cli_key .. '\t') end
if (debug) then io.write(srv_key .. '\n') end
process = 0
cli_num = findStringArray(cli_key,compared_hosts)
srv_num = findStringArray(srv_key,compared_hosts)
if ( (cli_num ~= nil) and (srv_num ~= nil) )then
if (cli_num and srv_num) then
if (cli_key == srv_key) then
process = 0
else
process = 1
end
else
process = 0
end
end
if (links_size > max_num_links) then process = 0 end
if ((ndpi_size > max_num_hosts) or
(l4_size > max_num_hosts) or
(ports_size > max_num_hosts))then process = 0 end
if (process == 1) then
if (debug) then io.write("Cli:"..cli_key..",Srv:"..srv_key..",Ndpi:"..flows_stats[key]["proto.ndpi"]..",L4:"..flows_stats[key]["proto.l4"].."\n") end
if (debug) then io.write("Aggregation:"..aggregation.."\n") end
aggregation_value = {}
if (aggregation == "ndpi") then
if (debug) then io.write("=>Value:"..flows_stats[key]["proto.ndpi"].."\n") end
-- 1.1 Save ndpi protocol
if (ndpi[flows_stats[key]["proto.ndpi"]] == nil) then
ndpi[flows_stats[key]["proto.ndpi"]] = ndpi_size
ndpi_size = ndpi_size + 1
aggregation_value[0] = flows_stats[key]["proto.ndpi"]
end
end
if (aggregation == "l4proto") then
if (debug) then io.write("=>Value:"..flows_stats[key]["proto.l4"].."\n") end
-- 1.2 Save l4 protocol
if (l4[flows_stats[key]["proto.l4"]] == nil) then
l4[flows_stats[key]["proto.l4"]] = l4_size
l4_size = l4_size + 1
aggregation_value[0] = flows_stats[key]["proto.l4"]
end
end
if (aggregation == "port") then
if (debug) then io.write("=>Value:"..flows_stats[key]["cli.port"].."\n") end
-- 1.3 Save port
nport = 0
if (ports[flows_stats[key]["cli.port"]] == nil) then
ports[flows_stats[key]["cli.port"]] = ports_size
ports_size = ports_size + 1
aggregation_value[nport] = flows_stats[key]["cli.port"]
nport = nport + 1
end
if (ports[flows_stats[key]["srv.port"]] == nil) then
ports[flows_stats[key]["srv.port"]] = ports_size
ports_size = ports_size + 1
aggregation_value[nport] = flows_stats[key]["srv.port"]
nport = nport + 1
end
end
for k,v in pairs(aggregation_value) do
if(debug) then io.write("links:" ..k .. '-' .. v ..'\n') end
if (links[cli_key..":"..v] == nil) then
links[cli_key..":"..v] = {}
links[cli_key..":"..v]["value"] = flows_stats[key]["cli2srv.bytes"]
else
links[cli_key..":"..v]["value"] = links[cli_key..":"..v]["value"] + flows_stats[key]["cli2srv.bytes"]
end
if (links[srv_key..":"..v] == nil) then
links[srv_key..":"..v] = {}
links[srv_key..":"..v]["value"] = flows_stats[key]["srv2cli.bytes"]
else
links[srv_key..":"..v]["value"] = links[srv_key..":"..v]["value"] + flows_stats[key]["cli2srv.bytes"]
end
if(debug) then io.write("Client: "..cli_key..", aggregation: "..v..",Value: "..links[cli_key..":"..v]["value"].."\n") end
if(debug) then io.write("Server: "..srv_key..", aggregation: "..v..",Value: "..links[srv_key..":"..v]["value"].."\n") end
end
end
end
-- 2. Create node
print '{"nodes":[\n'
-- 2.1 Host node
node_size = 0
for i,host_ip in ipairs(compared_hosts) do
if(node_size > 0) then
print ",\n"
end
node_info = interface.getHostInfo(host_ip)
if (node_info ~= nil) then
vlan_id = node_info["vlan"]
else
vlan_id = " "
end
local name = ip2label(host_ip, vlan_id)
print ("\t{\"name\": \"" .. name .. "\", \"ip\": \"" .. host_ip .. "\", \"vlan\": \"" .. vlan_id .. "\"}")
node_size = node_size + 1
end
-- 2.2 Aggregation node
if(aggregation == "l4proto") then
aggregation_node = l4
elseif (aggregation == "port") then
aggregation_node = ports
else
-- Default ndpi
aggregation_node = ndpi
end
for key,value in pairs(aggregation_node) do
if(debug) then io.write("Aggregation Node: "..key.."\n") end
if(node_size > 0) then
print ",\n"
end
print ("\t{\"name\": \"" .. key .. "\", \"ip\": \"" .. key .. "\"}")
node_size = node_size + 1
end
-- 3. Create links
print "\n],\n"
print '"links" : [\n'
-- 2. print links
num = 0
for i,host_ip in ipairs(compared_hosts) do
for aggregation_key,value in pairs(aggregation_node) do
if(links[host_ip..":"..aggregation_key] ~= nil) then
if(num > 0) then
print ",\n"
end
val = links[host_ip..":"..aggregation_key]["value"]
if (val == 0 ) then val = 1 end
print ("\t{\"source\": "..(i -1).. ", \"target\": "..(compared_hosts_size + value -2)..", \"value\": " .. val .. ", \"aggregation\": \""..aggregation.."\"}")
num = num + 1
end
end
end
end --End if (compared host size)
print ("\n]}\n")
end -- End if _GET[hosts]
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