Implemented vs_utils.get_active_hosts

scripts/lua/modules/vulnerability_scan/vs_utils.lua

@@ -371,36 +371,32 @@ end
 
 -- **********************************************************
 
--- Process to retrieve list of ports using nmap
-function vs_utils.get_ports(host)
-   -- FIXME
-   -- must returns array of object {key: port_id}
+-- Example vs_utils.get_active_hosts("192.168.2.0", "24")
+function vs_utils.get_active_hosts(host, cidr)
    local result = {}
 
-   result[#result+1] = {
-      key = 22
-   }
+   cidr = tonumber(cidr)
+   
+   if((cidr == 32) or (cidr == 128) or (host:find('.') == nil)) then
+      result[#result+1] = host -- return it as is
+   else
+      local s = string.split(host, '%.')
+      local net = s[1].."."..s[2].."."..s[3].."."
+      local command = 'nmap -sP -n ' .. net .. '1-254 | grep "Nmap scan report for" | cut -d " " -f 5'      
+      local handle = io.popen(command)
+      local out = handle:read("*a")
+      local l = lines(out)
+
+      handle:close()
+      
+      for _,h in pairs(l) do
+	 result[#result+1] = h
+      end
+   end
    
    return result
 end
 
 -- **********************************************************
 
-function vs_utils.get_active_hosts(host, cidr)
-
-   local result = {}
-
-   for i in range(1, 2 --[[ instead of cidr just for example --]], 1) do
-      
-      -- FIX ME
-      host = host:sub(1, -2)
-      host = host .. i
-      result[#result+1] = host
-   end
-
-   return result
-end
-
--- **********************************************************
-
 return vs_utils