Add support for system configuration (WIP)

scripts/lua/modules/conf_handlers/network_ifaces.lua

@@ -0,0 +1,102 @@
+--
+-- (C) 2013-20 - ntop.org
+--
+
+local sys_utils = require("sys_utils")
+local config = {}
+
+-- ################################################################
+
+function config.writeNetworkInterfaceConfig(f, iface, network_conf, dns_config, bridge_ifaces)
+  f:write("\nauto " .. iface .. "\n")
+
+  if network_conf.mode == "static" then
+    f:write("iface " .. iface .. " inet static\n")
+    f:write("\taddress " .. network_conf.ip .. "\n")
+    f:write("\tnetmask " .. network_conf.netmask .. "\n")
+
+    if not isEmptyString(network_conf.gateway) then
+      f:write("\tgateway " .. network_conf.gateway .. "\n")
+      f:write("\tdns-nameservers " .. table.concat({dns_config.global, dns_config.secondary}, " ") .. "\n")
+    end
+  elseif network_conf.mode == "vlan_trunk" then
+    -- nothing to configure for a vlan-trunk bridge interface 
+    f:write("iface " .. iface .. " inet manual\n")
+  else
+    f:write("iface " .. iface .. " inet " .. network_conf.mode .. "\n")
+
+    if network_conf.mode == "dhcp" then
+      f:write("\tpre-up /bin/rm -f /var/lib/dhcp/dhclient.".. iface ..".leases\n")
+    end
+  end
+
+  if string.contains(iface, ".") then
+    -- VLAN interface
+    local parts = split(iface, "%.")
+
+    if #parts == 2 then
+      f:write("\tvlan-raw-device " .. parts[1])
+    end
+  end
+
+  if bridge_ifaces ~= nil then
+    f:write("\tbridge_ports ".. table.concat(bridge_ifaces, " ") .. "\n")
+    f:write("\tbridge_stp off\n")
+  end
+end
+
+-- ################################################################
+
+function config.openNetworkInterfacesConfigFile()
+  -- verify that the file is actually included
+  for _, source in ipairs({"nedge.conf", "nedge_mgmt.conf"}) do
+    local source_line = "source /etc/network/interfaces.d/"..source
+    local res = sys_utils.execShellCmd("grep \"^" .. source_line .. "\" /etc/network/interfaces 2>/dev/null")
+
+    if isEmptyString(res) then
+      traceError(TRACE_NORMAL, TRACE_CONSOLE, "Adding missing '" .. source_line .. "'")
+
+      local f = sys_utils.openFile("/etc/network/interfaces", "a")
+      f:write("\n" .. source_line .. "\n")
+      f:close()
+    end
+  end
+
+  return sys_utils.openFile("/etc/network/interfaces.d/nedge.conf", "w")
+end
+
+-- ################################################################
+
+function config.closeNetworkInterfacesConfigFile(f)
+  f:close()
+end
+
+-- ################################################################
+
+function config.backupNetworkInterfacesFiles(to_backup)
+    os.rename("/etc/network/interfaces", "/etc/network/interfaces.old")
+    traceError(TRACE_WARNING, TRACE_CONSOLE, "/etc/network/interfaces has been moved to /etc/network/interfaces.old")
+end
+
+-- ################################################################
+
+function config.isConfiguredInterface(iface)
+  local res = sys_utils.execShellCmd("grep \"^\\s*[^#]*" .. iface .. "\" /etc/network/interfaces")
+  return not isEmptyString(res)
+end
+
+-- ################################################################
+
+function config.dhcpInterfaceGetGateway(iface)
+  local res = sys_utils.execShellCmd("grep \"option routers\" /var/lib/dhcp/dhclient." .. iface .. ".leases 2>/dev/null | tail -n 1")
+
+  if not isEmptyString(res) then
+    return res:gmatch("routers ([^;]+)")()
+  end
+
+  return res
+end
+
+-- ################################################################
+
+return config