IOU integration.

Improvements on module management.
File upload support.
Config file for the server.

gns3server/config.py

@@ -0,0 +1,115 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2014 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Reads the configuration file and store the settings for the server & modules.
+"""
+
+import sys
+import os
+import configparser
+
+import logging
+log = logging.getLogger(__name__)
+
+
+class Config(object):
+    """
+    Configuration file management using configparser.
+    """
+
+    def __init__(self):
+
+        appname = "GNS3"
+        if sys.platform.startswith("win"):
+
+            # On windows, the configuration file location can be one of the following:
+            # 1: %APPDATA%/GNS3/server.ini
+            # 2: %APPDATA%/GNS3.ini
+            # 3: %COMMON_APPDATA%/GNS3/server.ini
+            # 4: %COMMON_APPDATA%/GNS3.ini
+            # 5: server.ini in the current working directory
+
+            appdata = os.path.expandvars("%APPDATA%")
+            common_appdata = os.path.expandvars("%COMMON_APPDATA%")
+            filename = "server.ini"
+            self._files = [os.path.join(appdata, appname, filename),
+                           os.path.join(appdata, appname + ".ini"),
+                           os.path.join(common_appdata, appname, filename),
+                           os.path.join(common_appdata, appname + ".ini"),
+                           filename]
+        else:
+
+            # On UNIX-like platforms, the configuration file location can be one of the following:
+            # 1: $HOME/.config/GNS3/server.conf
+            # 2: $HOME/.config/GNS3.conf
+            # 3: /etc/xdg/GNS3/server.conf
+            # 4: /etc/xdg/GNS3.conf
+            # 5: server.conf in the current working directory
+
+            home = os.path.expanduser("~")
+            filename = "server.conf"
+            self._files = [os.path.join(home, ".config", appname, filename),
+                           os.path.join(home, ".config", appname + ".conf"),
+                           os.path.join("/etc/xdg", appname, filename),
+                           os.path.join("/etc/xdg", appname + ".conf"),
+                           filename]
+
+        self._config = configparser.ConfigParser()
+        self.read_config()
+
+    def read_config(self):
+        """
+        Read the configuration files.
+        """
+
+        parsed_files = self._config.read(self._files)
+        if not parsed_files:
+            log.warning("no configuration file could be found or read")
+
+    def get_default_section(self):
+        """
+        Get the default configuration section.
+
+        :returns: configparser section
+        """
+
+        return self._config["DEFAULT"]
+
+    def get_section_config(self, section):
+        """
+        Get a specific configuration section.
+        Returns the default section if none can be found.
+
+        :returns: configparser section
+        """
+
+        if not section in self._config:
+            return self._config["DEFAULT"]
+        return self._config[section]
+
+    @staticmethod
+    def instance():
+        """
+        Singleton to return only on instance of Config.
+
+        :returns: instance of Config
+        """
+
+        if not hasattr(Config, "_instance"):
+            Config._instance = Config()
+        return Config._instance

gns3server/handlers/file_upload_handler.py

@@ -0,0 +1,77 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2014 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Simple file upload & listing handler.
+"""
+
+
+import os
+import tornado.web
+from ..config import Config
+
+import logging
+log = logging.getLogger(__name__)
+
+
+class FileUploadHandler(tornado.web.RequestHandler):
+    """
+    File upload handler.
+
+    :param application: Tornado Application instance
+    :param request: Tornado Request instance
+    """
+
+    def __init__(self, application, request):
+
+        # get the upload directory from the configuration file
+        config = Config.instance()
+        server_config = config.get_default_section()
+        # default projects directory is "~/Documents/GNS3/images"
+        self._upload_dir = os.path.expandvars(os.path.expanduser(server_config.get("upload_directory", "~/Documents/GNS3/images")))
+
+        if not os.path.exists(self._upload_dir):
+            try:
+                os.makedirs(self._upload_dir)
+                log.info("upload directory '{}' created".format(self._upload_dir))
+            except EnvironmentError as e:
+                log.error("could not create the upload directory {}: {}".format(self._upload_dir, e))
+
+        tornado.websocket.WebSocketHandler.__init__(self, application, request)
+
+    def get(self):
+        """
+        Invoked on GET request.
+        """
+
+        items = []
+        path = self._upload_dir
+        for filename in os.listdir(path):
+            items.append(filename)
+
+        self.render("upload.html", path=path, items=items)
+
+    def post(self):
+        """
+        Invoked on POST request.
+        """
+
+        fileinfo = self.request.files["file"][0]
+        destination_path = os.path.join(self._upload_dir, fileinfo['filename'])
+        with open(destination_path, 'wb') as f:
+            f.write(fileinfo['body'])
+        self.redirect("/upload")

gns3server/handlers/jsonrpc_websocket.py

@@ -101,7 +101,7 @@ class JSONRPCWebSocket(tornado.websocket.WebSocketHandler):
         # by another module for instance
         assert destination not in cls.destinations
         log.debug("registering {} as a destination for the {} module".format(destination,
-                                                                            module))
+                                                                             module))
         cls.destinations[destination] = module
 
     def open(self):

gns3server/handlers/upload.html

@@ -0,0 +1,22 @@
+<html>
+<head> 
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 
+<title>Upload Form</title>
+</head>
+<body>
+<p><h1>Select & Upload</h1></p>
+<form enctype="multipart/form-data" action="/upload" method="post">
+File: <input type="file" name="file" />
+<br />
+<br />
+<input type="submit" value="upload" />
+</form>
+{%if items%}
+<h3>Files</h3>
+<ul>
+{%for item in items%}
+<li>{{path}}{{item}}</a></li>
+{%end%}
+{%end%}
+</ul>
+</body>

gns3server/module_manager.py

@@ -82,7 +82,7 @@ class ModuleManager(object):
                                 log.info("loading {} module".format(module_class[0].lower()))
                                 info = Module(name=module_class[0].lower(), cls=module_class[1])
                                 self._modules.append(info)
-                except Exception as e:
+                except Exception:
                     log.critical("error while analyzing {} package directory".format(name), exc_info=1)
                 finally:
                     if file:
@@ -97,7 +97,7 @@ class ModuleManager(object):
 
         return self._modules
 
-    def activate_module(self, module, args=(), kwargs={}):
+    def activate_module(self, module, *args, **kwargs):
         """
         Activates a given module.
 
@@ -109,6 +109,10 @@ class ModuleManager(object):
         """
 
         module_class = module.cls()
-        module_instance = module_class(name=module.name, args=args, kwargs={})
+        try:
-        log.info("activating {} module".format(module.name))
+            module_instance = module_class(module.name, *args, **kwargs)
+        except Exception:
+            log.critical("error while activating the {} module".format(module.name), exc_info=1)
+            return None
+        log.info("activating the {} module".format(module.name))
         return module_instance

gns3server/modules/base.py

@@ -37,15 +37,11 @@ class IModule(multiprocessing.Process):
     :param kwargs: named arguments for the module
     """
 
-    destination = {}
+    modules = {}
 
-    def __init__(self, name=None, args=(), kwargs={}):
+    def __init__(self, name, *args, **kwargs):
-
-        multiprocessing.Process.__init__(self,
-                                         name=name,
-                                         args=args,
-                                         kwargs=kwargs)
 
+        multiprocessing.Process.__init__(self, name=name)
         self._context = None
         self._ioloop = None
         self._stream = None
@@ -203,14 +199,14 @@ class IModule(multiprocessing.Process):
         destination = request[1].get("method")
         params = request[1].get("params")
 
-        if destination not in self.destination:
+        if destination not in self.modules[self.name]:
             self.send_internal_error()
             return
 
         log.debug("Routing request to {}: {}".format(destination, request[1]))
 
         try:
-            self.destination[destination](self, params)
+            self.modules[self.name][destination](self, params)
         except Exception as e:
             log.error("uncaught exception {type}".format(type=type(e)), exc_info=1)
             self.send_custom_error("uncaught exception {type}: {string}".format(type=type(e), string=str(e)))
@@ -222,7 +218,10 @@ class IModule(multiprocessing.Process):
         :returns: list of destinations
         """
 
-        return self.destination.keys()
+        if not self.name in self.modules:
+            log.warn("no destinations found for module {}".format(self.name))
+            return []
+        return self.modules[self.name].keys()
 
     @classmethod
     def route(cls, destination):
@@ -233,6 +232,9 @@ class IModule(multiprocessing.Process):
         """
 
         def wrapper(method):
-            cls.destination[destination] = method
+            module = destination.split(".")[0]
+            if not module in cls.modules:
+                cls.modules[module] = {}
+            cls.modules[module][destination] = method
             return method
         return wrapper

gns3server/modules/dynamips/__init__.py

@@ -97,8 +97,9 @@ class Dynamips(IModule):
     :param kwargs: named arguments for the module
     """
 
-    def __init__(self, name=None, args=(), kwargs={}):
+    def __init__(self, name, *args, **kwargs):
-        IModule.__init__(self, name=name, args=args, kwargs=kwargs)
+
+        IModule.__init__(self, name, *args, **kwargs)
 
         self._hypervisor_manager = None
         self._remote_server = False
@@ -107,6 +108,8 @@ class Dynamips(IModule):
         self._frame_relay_switches = {}
         self._atm_switches = {}
         self._ethernet_hubs = {}
+        self._projects_dir = kwargs["projects_dir"]
+        self._tempdir = kwargs["temp_dir"]
 
         #self._callback = self.add_periodic_callback(self.test, 1000)
         #self._callback.start()
@@ -189,13 +192,7 @@ class Dynamips(IModule):
             else:
                 self._remote_server = True
                 log.info("this server is remote")
-                try:
+                working_dir = self._projects_dir
-                    working_dir = tempfile.mkdtemp(prefix="gns3-remote-server-")
-                    working_dir = os.path.join(working_dir, "dynamips")
-                    os.makedirs(working_dir)
-                    log.info("temporary working directory created: {}".format(working_dir))
-                except EnvironmentError as e:
-                    raise DynamipsError("Could not create temporary working directory: {}".format(e))
 
             #TODO: check if executable
             if not os.path.exists(dynamips_path):
@@ -342,28 +339,6 @@ class Dynamips(IModule):
             router.ghost_status = 2
             router.ghost_file = ghost_instance
 
-#     def get_base64_config(self, config_path, router):
-#         """
-#         Get the base64 encoded config from a file.
-#         Replaces %h by the router name.
-# 
-#         :param config_path: path to the configuration file.
-#         :param router: Router instance.
-# 
-#         :returns: base64 encoded string
-#         """
-# 
-#         try:
-#             with open(config_path, "r") as f:
-#                 log.info("opening configuration file: {}".format(config_path))
-#                 config = f.read()
-#                 config = '!\n' + config.replace('\r', "")
-#                 config = config.replace('%h', router.name)
-#                 encoded = ("").join(base64.encodestring(config.encode("utf-8")).decode("utf-8").split())
-#                 return encoded
-#         except EnvironmentError as e:
-#             raise DynamipsError("Cannot parse {}: {}".format(config_path, e))
-
     @IModule.route("dynamips.nio.get_interfaces")
     def nio_get_interfaces(self, request):
         """

gns3server/modules/dynamips/backends/atmsw.py

@@ -84,6 +84,7 @@ class ATMSW(object):
         try:
             atmsw.delete()
             self._hypervisor_manager.unallocate_hypervisor_for_simulated_device(atmsw)
+            del self._atm_switches[atmsw_id]
         except DynamipsError as e:
             self.send_custom_error(str(e))
             return

gns3server/modules/dynamips/backends/ethhub.py

@@ -83,6 +83,7 @@ class ETHHUB(object):
         try:
             ethhub.delete()
             self._hypervisor_manager.unallocate_hypervisor_for_simulated_device(ethhub)
+            del self._ethernet_hubs[ethhub_id]
         except DynamipsError as e:
             self.send_custom_error(str(e))
             return

gns3server/modules/dynamips/backends/ethsw.py

@@ -83,6 +83,7 @@ class ETHSW(object):
         try:
             ethsw.delete()
             self._hypervisor_manager.unallocate_hypervisor_for_simulated_device(ethsw)
+            del self._ethernet_switches[ethsw_id]
         except DynamipsError as e:
             self.send_custom_error(str(e))
             return

gns3server/modules/dynamips/backends/frsw.py

@@ -83,6 +83,7 @@ class FRSW(object):
         try:
             frsw.delete()
             self._hypervisor_manager.unallocate_hypervisor_for_simulated_device(frsw)
+            del self._frame_relay_switches[frsw_id]
         except DynamipsError as e:
             self.send_custom_error(str(e))
             return

gns3server/modules/dynamips/backends/vm.py

@@ -206,6 +206,7 @@ class VM(object):
         try:
             router.delete()
             self._hypervisor_manager.unallocate_hypervisor_for_router(router)
+            del self._routers[router_id]
         except DynamipsError as e:
             self.send_custom_error(str(e))
             return

gns3server/modules/dynamips/hypervisor.py

@@ -211,11 +211,16 @@ class Hypervisor(DynamipsHypervisor):
         if self.is_running():
             DynamipsHypervisor.stop(self)
             log.info("stopping Dynamips PID={}".format(self._process.pid))
-            # give some time for the hypervisor to properly stop.
+            try:
-            # time to delete UNIX NIOs for instance.
+                # give some time for the hypervisor to properly stop.
-            time.sleep(0.01)
+                # time to delete UNIX NIOs for instance.
-            self._process.kill()
+                time.sleep(0.01)
-            self._process.wait()
+                self._process.terminate()
+                self._process.wait(1)
+            except subprocess.TimeoutExpired:
+                self._process.kill()
+                if self._process.poll() == None:
+                    log.warn("Dynamips process {} is still running".format(self._process.pid))
 
     def read_stdout(self):
         """

gns3server/modules/dynamips/hypervisor_manager.py

@@ -20,7 +20,6 @@ Manages Dynamips hypervisors (load-balancing etc.)
 """
 
 from .hypervisor import Hypervisor
-from .dynamips_error import DynamipsError
 import socket
 import time
 import logging

gns3server/modules/iou/__init__.py

@@ -0,0 +1,506 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2014 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+IOU server module.
+"""
+
+import os
+import sys
+import base64
+import tempfile
+from gns3server.modules import IModule
+from gns3server.config import Config
+from .iou_device import IOUDevice
+from .iou_error import IOUError
+from .nios.nio_udp import NIO_UDP
+import gns3server.jsonrpc as jsonrpc
+
+import logging
+log = logging.getLogger(__name__)
+
+
+class IOU(IModule):
+    """
+    IOU module.
+
+    :param name: module name
+    :param args: arguments for the module
+    :param kwargs: named arguments for the module
+    """
+
+    def __init__(self, name, *args, **kwargs):
+
+        if not sys.platform.startswith("linux"):
+            raise IOUError("Sorry the IOU module only works on Linux")
+
+        # get the iouyap location
+        config = Config.instance()
+        iou_config = config.get_section_config(name.upper())
+        self._iouyap = iou_config.get("iouyap")
+        if not self._iouyap:
+            for path in os.environ["PATH"].split(":"):
+                if "iouyap" in os.listdir(path) and os.access("iouyap", os.X_OK):
+                    self._iouyap = os.path.join(path, "iouyap")
+                    break
+
+        if not self._iouyap or not os.path.exists(self._iouyap):
+            raise IOUError("iouyap binary couldn't be found!")
+
+        if not os.access(self._iouyap, os.X_OK):
+            raise IOUError("iouyap is not executable")
+
+        # a new process start when calling IModule
+        IModule.__init__(self, name, *args, **kwargs)
+        self._remote_server = False
+        self._iou_instances = {}
+        self._console_start_port_range = 4001
+        self._console_end_port_range = 4512
+        self._current_console_port = self._console_start_port_range
+        self._udp_start_port_range = 30001
+        self._udp_end_port_range = 40001
+        self._current_udp_port = self._udp_start_port_range
+        self._host = "127.0.0.1"
+        self._projects_dir = kwargs["projects_dir"]
+        self._tempdir = kwargs["temp_dir"]
+        self._working_dir = self._projects_dir
+
+        #self._callback = self.add_periodic_callback(self.test, 1000)
+        #self._callback.start()
+
+    def stop(self):
+        """
+        Properly stops the module.
+        """
+
+        # delete all IOU instances
+        for iou_id in self._iou_instances:
+            iou_instance = self._iou_instances[iou_id]
+            iou_instance.delete()
+
+        IModule.stop(self)  # this will stop the I/O loop
+
+    @IModule.route("iou.reset")
+    def reset(self, request):
+        """
+        Resets the module.
+
+        :param request: JSON request
+        """
+
+        # delete all IOU instances
+        for iou_id in self._iou_instances:
+            iou_instance = self._iou_instances[iou_id]
+            iou_instance.delete()
+
+        # resets the instance IDs
+        IOUDevice.reset()
+
+        self._iou_instances.clear()
+        self._remote_server = False
+        self._current_console_port = self._console_start_port_range
+        self._current_udp_port = self._udp_start_port_range
+        log.info("IOU module has been reset")
+
+    @IModule.route("iou.settings")
+    def settings(self, request):
+        """
+        Set or update settings.
+
+        Mandatory request parameters:
+        - path (path to the IOU executable)
+
+        Optional request parameters:
+        - working_dir (path to a working directory)
+        - console_start_port_range
+        - console_end_port_range
+        - udp_start_port_range
+        - udp_end_port_range
+
+        :param request: JSON request
+        """
+
+        if request == None:
+            self.send_param_error()
+            return
+
+        print(request)
+
+        if "working_dir" in request and self._working_dir != request["working_dir"]:
+            self._working_dir = request["working_dir"]
+            log.info("this server is local with working directory path to {}".format(self._working_dir))
+            for iou_id in self._iou_instances:
+                iou_instance = self._iou_instances[iou_id]
+                iou_instance.working_dir = self._working_dir
+        else:
+            self._remote_server = True
+            log.info("this server is remote")
+            self._working_dir = self._projects_dir
+
+        if "console_start_port_range" in request and "console_end_port_range" in request:
+            self._console_start_port_range = request["console_start_port_range"]
+            self._console_end_port_range = request["console_end_port_range"]
+
+        if "udp_start_port_range" in request and "udp_end_port_range" in request:
+            self._udp_start_port_range = request["udp_start_port_range"]
+            self._udp_end_port_range = request["udp_end_port_range"]
+
+        log.debug("received request {}".format(request))
+
+    @IModule.route("iou.create")
+    def iou_create(self, request):
+        """
+        Creates a new IOU instance.
+
+        Optional request parameters:
+        - name (IOU name)
+        - path (path to IOU)
+
+        Response parameters:
+        - id (IOU instance identifier)
+        - name (IOU name)
+
+        :param request: JSON request
+        """
+
+        #TODO: JSON schema validation for the request
+        name = None
+        if request and "name" in request:
+            name = request["name"]
+
+        iou_path = request["path"]
+
+        try:
+            iou_instance = IOUDevice(iou_path, self._working_dir, name=name)
+            # find a console port
+            if self._current_console_port >= self._console_end_port_range:
+                self._current_console_port = self._console_start_port_range
+            iou_instance.console = IOUDevice.find_unused_port(self._current_console_port, self._console_end_port_range, self._host)
+            self._current_console_port += 1
+        except IOUError as e:
+            self.send_custom_error(str(e))
+            return
+
+        response = {"name": iou_instance.name,
+                    "id": iou_instance.id}
+
+        defaults = iou_instance.defaults()
+        response.update(defaults)
+        self._iou_instances[iou_instance.id] = iou_instance
+        self.send_response(response)
+
+    @IModule.route("iou.delete")
+    def iou_delete(self, request):
+        """
+        Deletes an IOU instance.
+
+        Mandatory request parameters:
+        - id (IOU instance identifier)
+
+        Response parameters:
+        - same as original request
+
+        :param request: JSON request
+        """
+
+        if request == None:
+            self.send_param_error()
+            return
+
+        #TODO: JSON schema validation for the request
+        log.debug("received request {}".format(request))
+        iou_id = request["id"]
+        iou_instance = self._iou_instances[iou_id]
+        try:
+            iou_instance.delete()
+            del self._iou_instances[iou_id]
+        except IOUError as e:
+            self.send_custom_error(str(e))
+            return
+        self.send_response(request)
+
+    @IModule.route("iou.update")
+    def iou_update(self, request):
+        """
+        Updates an IOU instance
+
+        Mandatory request parameters:
+        - id (IOU instance identifier)
+
+        Optional request parameters:
+        - any setting to update
+        - startup_config_base64 (startup-config base64 encoded)
+
+        Response parameters:
+        - same as original request
+
+        :param request: JSON request
+        """
+
+        if request == None:
+            self.send_param_error()
+            return
+
+        #TODO: JSON schema validation for the request
+        log.debug("received request {}".format(request))
+        iou_id = request["id"]
+        iou_instance = self._iou_instances[iou_id]
+
+        try:
+            # a new startup-config has been pushed
+            if "startup_config_base64" in request:
+                config = base64.decodestring(request["startup_config_base64"].encode("utf-8")).decode("utf-8")
+                config = "!\n" + config.replace("\r", "")
+                config = config.replace('%h', iou_instance.name)
+                config_path = os.path.join(iou_instance.working_dir, "startup-config")
+                try:
+                    with open(config_path, "w") as f:
+                        log.info("saving startup-config to {}".format(config_path))
+                        f.write(config)
+                except EnvironmentError as e:
+                    raise IOUError("Could not save the configuration {}: {}".format(config_path, e))
+                request["startup_config"] = os.path.basename(config_path)
+            if "startup_config" in request:
+                iou_instance.startup_config = request["startup_config"]
+        except IOUError as e:
+            self.send_custom_error(str(e))
+            return
+
+        for name, value in request.items():
+            if hasattr(iou_instance, name) and getattr(iou_instance, name) != value:
+                try:
+                    setattr(iou_instance, name, value)
+                except IOUError as e:
+                    self.send_custom_error(str(e))
+                    return
+
+        self.send_response(request)
+
+    @IModule.route("iou.start")
+    def vm_start(self, request):
+        """
+        Starts an IOU instance.
+
+        Mandatory request parameters:
+        - id (IOU instance identifier)
+
+        Response parameters:
+        - same as original request
+
+        :param request: JSON request
+        """
+
+        if request == None:
+            self.send_param_error()
+            return
+
+        #TODO: JSON schema validation for the request
+        log.debug("received request {}".format(request))
+        iou_id = request["id"]
+        iou_instance = self._iou_instances[iou_id]
+        try:
+            log.debug("starting IOU with command: {}".format(iou_instance.command()))
+            iou_instance.iouyap = self._iouyap
+            iou_instance.start()
+        except IOUError as e:
+            self.send_custom_error(str(e))
+            return
+        self.send_response(request)
+
+    @IModule.route("iou.stop")
+    def vm_stop(self, request):
+        """
+        Stops an IOU instance.
+
+        Mandatory request parameters:
+        - id (IOU instance identifier)
+
+        Response parameters:
+        - same as original request
+
+        :param request: JSON request
+        """
+
+        if request == None:
+            self.send_param_error()
+            return
+
+        #TODO: JSON schema validation for the request
+        log.debug("received request {}".format(request))
+        iou_id = request["id"]
+        iou_instance = self._iou_instances[iou_id]
+        try:
+            iou_instance.stop()
+        except IOUError as e:
+            self.send_custom_error(str(e))
+            return
+        self.send_response(request)
+
+    @IModule.route("iou.allocate_udp_port")
+    def allocate_udp_port(self, request):
+        """
+        Allocates a UDP port in order to create an UDP NIO.
+
+        Mandatory request parameters:
+        - id (IOU identifier)
+        - port_id (unique port identifier)
+
+        Response parameters:
+        - port_id (unique port identifier)
+        - lhost (local host address)
+        - lport (allocated local port)
+
+        :param request: JSON request
+        """
+
+        if request == None:
+            self.send_param_error()
+            return
+
+        #TODO: JSON schema validation for the request
+        log.debug("received request {}".format(request))
+        iou_id = request["id"]
+        iou_instance = self._iou_instances[iou_id]
+
+        try:
+
+            # find a UDP port
+            if self._current_udp_port >= self._udp_end_port_range:
+                self._current_udp_port = self._udp_start_port_range
+            port = IOUDevice.find_unused_port(self._current_udp_port, self._udp_end_port_range, host=self._host, socket_type="UDP")
+            self._current_udp_port += 1
+
+            log.info("{} [id={}] has allocated UDP port {} with host {}".format(iou_instance .name,
+                                                                                iou_instance .id,
+                                                                                port,
+                                                                                self._host))
+            response = {"lport": port,
+                        "lhost": self._host}
+
+        except IOUError as e:
+            self.send_custom_error(str(e))
+            return
+
+        response["port_id"] = request["port_id"]
+        self.send_response(response)
+
+    @IModule.route("iou.add_nio")
+    def add_nio(self, request):
+        """
+        Adds an NIO (Network Input/Output) for an IOU instance.
+
+        Mandatory request parameters:
+        - id (IOU instance identifier)
+        - slot (slot number)
+        - port (port number)
+        - port_id (unique port identifier)
+        - nio (nio type, one of the following)
+            - "NIO_UDP"
+                - lport (local port)
+                - rhost (remote host)
+                - rport (remote port)
+
+        Response parameters:
+        - same as original request
+
+        :param request: JSON request
+        """
+
+        if request == None:
+            self.send_param_error()
+            return
+
+        #TODO: JSON schema validation for the request
+        log.debug("received request {}".format(request))
+        iou_id = request["id"]
+        iou_instance = self._iou_instances[iou_id]
+
+        slot = request["slot"]
+        port = request["port"]
+
+        try:
+            nio = None
+            #TODO: support for TAP and Ethernet NIOs
+            if request["nio"] == "NIO_UDP":
+                lport = request["lport"]
+                rhost = request["rhost"]
+                rport = request["rport"]
+                nio = NIO_UDP(lport, rhost, rport)
+            if not nio:
+                raise IOUError("Requested NIO doesn't exist or is not supported: {}".format(request["nio"]))
+        except IOUError as e:
+            self.send_custom_error(str(e))
+            return
+
+        try:
+            iou_instance.slot_add_nio_binding(slot, port, nio)
+        except IOUError as e:
+            self.send_custom_error(str(e))
+            return
+
+        # for now send back the original request
+        self.send_response(request)
+
+    @IModule.route("iou.delete_nio")
+    def delete_nio(self, request):
+        """
+        Deletes an NIO (Network Input/Output).
+
+        Mandatory request parameters:
+        - id (IOU instance identifier)
+        - slot (slot identifier)
+        - port (port identifier)
+
+        Response parameters:
+        - same as original request
+
+        :param request: JSON request
+        """
+
+        if request == None:
+            self.send_param_error()
+            return
+
+        #TODO: JSON schema validation for the request
+        log.debug("received request {}".format(request))
+        iou_id = request["id"]
+        iou_instance = self._iou_instances[iou_id]
+        slot = request["slot"]
+        port = request["port"]
+
+        try:
+            iou_instance.slot_remove_nio_binding(slot, port)
+        except IOUError as e:
+            self.send_custom_error(str(e))
+            return
+
+        # for now send back the original request
+        self.send_response(request)
+
+    @IModule.route("iou.echo")
+    def echo(self, request):
+        """
+        Echo end point for testing purposes.
+
+        :param request: JSON request
+        """
+
+        if request == None:
+            self.send_param_error()
+        else:
+            log.debug("received request {}".format(request))
+            self.send_response(request)

gns3server/modules/iou/adapters/adapter.py

@@ -0,0 +1,104 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2014 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+class Adapter(object):
+    """
+    Base class for adapters.
+
+    :param interfaces: number of interfaces supported by this adapter.
+    """
+
+    def __init__(self, interfaces=4):
+
+        self._interfaces = interfaces
+
+        self._ports = {}
+        for port_id in range(0, interfaces):
+            self._ports[port_id] = None
+
+    def removable(self):
+        """
+        Returns True if the adapter can be removed from a slot
+        and False if not.
+
+        :returns: boolean
+        """
+
+        return True
+
+    def port_exists(self, port_id):
+        """
+        Checks if a port exists on this adapter.
+
+        :returns: True is the port exists,
+        False otherwise.
+        """
+
+        if port_id in self._ports:
+            return True
+        return False
+
+    def add_nio(self, port_id, nio):
+        """
+        Adds a NIO to a port on this adapter.
+
+        :param port_id: port ID (integer)
+        :param nio: NIO instance
+        """
+
+        self._ports[port_id] = nio
+
+    def remove_nio(self, port_id):
+        """
+        Removes a NIO from a port on this adapter.
+
+        :param port_id: port ID (integer)
+        """
+
+        self._ports[port_id] = None
+
+    def get_nio(self, port_id):
+        """
+        Returns the NIO assigned to a port.
+
+        :params port_id: port ID (integer)
+
+        :returns: NIO instance
+        """
+
+        return self._ports[port_id]
+
+    @property
+    def ports(self):
+        """
+        Returns port to NIO mapping
+
+        :returns: dictionary port -> NIO
+        """
+
+        return self._ports
+
+    @property
+    def interfaces(self):
+        """
+        Returns the number of interfaces supported by this adapter.
+
+        :returns: number of interfaces
+        """
+
+        return self._interfaces

gns3server/modules/iou/adapters/ethernet_adapter.py

@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2014 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from .adapter import Adapter
+
+
+class EthernetAdapter(Adapter):
+    """
+    IOU Ethernet adapter.
+    """
+
+    def __init__(self):
+        Adapter.__init__(self, interfaces=4)
+
+    def __str__(self):
+
+        return "IOU Ethernet adapter"

gns3server/modules/iou/adapters/serial_adapter.py

@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2014 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from .adapter import Adapter
+
+
+class SerialAdapter(Adapter):
+    """
+    IOU Serial adapter.
+    """
+
+    def __init__(self):
+        Adapter.__init__(self, interfaces=4)
+
+    def __str__(self):
+
+        return "IOU Serial adapter"

gns3server/modules/iou/iou_device.py

@@ -0,0 +1,767 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2014 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+IOU device management (creates command line, processes, files etc.) in
+order to run an IOU instance.
+"""
+
+import os
+import socket
+import errno
+import signal
+import subprocess
+import argparse
+import threading
+import configparser
+from .ioucon import start_ioucon
+from .iou_error import IOUError
+from .adapters.ethernet_adapter import EthernetAdapter
+from .adapters.serial_adapter import SerialAdapter
+
+
+import logging
+log = logging.getLogger(__name__)
+
+
+class IOUDevice(object):
+    """
+    IOU device implementation.
+
+    :param path: path to IOU executable
+    :param working_dir: path to a working directory
+    :param host: host/address to bind for console and UDP connections
+    :param name: name of this IOU device
+    """
+
+    _instances = []
+
+    def __init__(self, path, working_dir, host="127.0.0.1", name=None):
+
+        # find an instance identifier (0 < id <= 512)
+        self._id = 0
+        for identifier in range(1, 513):
+            if identifier not in self._instances:
+                self._id = identifier
+                self._instances.append(self._id)
+                break
+
+        if self._id == 0:
+            raise IOUError("Maximum number of IOU instances reached")
+
+        if name:
+            self._name = name
+        else:
+            self._name = "IOU{}".format(self._id)
+        self._path = path
+        self._iourc = ""
+        self._iouyap = ""
+        self._console = None
+        self._working_dir = None
+        self._command = []
+        self._process = None
+        self._iouyap_process = None
+        self._stdout_file = ""
+        self._ioucon_thead = None
+        self._ioucon_thread_stop_event = None
+        self._host = host
+
+        # IOU settings
+        self._ethernet_adapters = [EthernetAdapter(), EthernetAdapter()]  # one adapter = 4 interfaces
+        self._serial_adapters = [SerialAdapter(), SerialAdapter()]  # one adapter = 4 interfaces
+        self._slots = self._ethernet_adapters + self._serial_adapters
+        self._nvram = 128  # Kilobytes
+        self._startup_config = ""
+        self._ram = 256  # Megabytes
+
+        # update the working directory
+        self.working_dir = working_dir
+
+        log.info("IOU device {name} [id={id}] has been created".format(name=self._name,
+                                                                       id=self._id))
+
+    def defaults(self):
+        """
+        Returns all the default attribute values for IOU.
+
+        :returns: default values (dictionary)
+        """
+
+        iou_defaults = {"name": self._name,
+                        "path": self._path,
+                        "iourc": self._iourc,
+                        "startup_config": self._startup_config,
+                        "ram": self._ram,
+                        "nvram": self._nvram,
+                        "ethernet_adapters": len(self._ethernet_adapters),
+                        "serial_adapters": len(self._serial_adapters),
+                        "console": self._console}
+
+        return iou_defaults
+
+    @property
+    def id(self):
+        """
+        Returns the unique ID for this IOU device.
+
+        :returns: id (integer)
+        """
+
+        return(self._id)
+
+    @classmethod
+    def reset(cls):
+        """
+        Resets allocated instance list.
+        """
+
+        cls._instances.clear()
+
+    @property
+    def name(self):
+        """
+        Returns the name of this IOU device.
+
+        :returns: name
+        """
+
+        return self._name
+
+    @name.setter
+    def name(self, new_name):
+        """
+        Sets the name of this IOU device.
+
+        :param new_name: name
+        """
+
+        self._name = new_name
+        log.info("IOU {name} [id={id}]: renamed to {new_name}".format(name=self._name,
+                                                                      id=self._id,
+                                                                      new_name=new_name))
+
+    @property
+    def path(self):
+        """
+        Returns the path to the IOU executable.
+
+        :returns: path to IOU
+        """
+
+        return(self._path)
+
+    @path.setter
+    def path(self, path):
+        """
+        Sets the path to the IOU executable.
+
+        :param path: path to IOU
+        """
+
+        self._path = path
+        log.info("IOU {name} [id={id}]: path changed to {path}".format(name=self._name,
+                                                                      id=self._id,
+                                                                      path=path))
+
+    @property
+    def iourc(self):
+        """
+        Returns the path to the iourc file.
+
+        :returns: path to the iourc file
+        """
+
+        return(self._iourc)
+
+    @iourc.setter
+    def iourc(self, iourc):
+        """
+        Sets the path to the iourc file.
+
+        :param path: path to the iourc file.
+        """
+
+        self._iourc = iourc
+        log.info("IOU {name} [id={id}]: iourc file path set to {path}".format(name=self._name,
+                                                                              id=self._id,
+                                                                              path=self._iourc))
+
+    @property
+    def iouyap(self):
+        """
+        Returns the path to iouyap
+
+        :returns: path to iouyap
+        """
+
+        return(self._iouyap)
+
+    @iouyap.setter
+    def iouyap(self, iouyap):
+        """
+        Sets the path to iouyap.
+
+        :param path: path to iouyap
+        """
+
+        self._iouyap = iouyap
+        log.info("IOU {name} [id={id}]: iouyap path set to {path}".format(name=self._name,
+                                                                          id=self._id,
+                                                                          path=self._iouyap))
+
+    @property
+    def working_dir(self):
+        """
+        Returns current working directory
+
+        :returns: path to the working directory
+        """
+
+        return self._working_dir
+
+    @working_dir.setter
+    def working_dir(self, working_dir):
+        """
+        Sets the working directory for IOU.
+
+        :param working_dir: path to the working directory
+        """
+
+        # create our own working directory
+        working_dir = os.path.join(working_dir, "device-{}".format(self._id))
+        if not os.path.exists(working_dir):
+            try:
+                os.makedirs(working_dir)
+            except EnvironmentError as e:
+                raise IOUError("Could not create working directory {}: {}".format(working_dir, e))
+
+        self._working_dir = working_dir
+        log.info("IOU {name} [id={id}]: working directory changed to {wd}".format(name=self._name,
+                                                                                    id=self._id,
+                                                                                    wd=self._working_dir))
+
+    @property
+    def console(self):
+        """
+        Returns the TCP console port.
+
+        :returns: console port (integer)
+        """
+
+        return self._console
+
+    @console.setter
+    def console(self, console):
+        """
+        Sets the TCP console port.
+
+        :param console: console port (integer)
+        """
+
+        self._console = console
+        log.info("IOU {name} [id={id}]: console port set to {port}".format(name=self._name,
+                                                                         id=self._id,
+                                                                         port=console))
+
+    def command(self):
+        """
+        Returns the IOU command line.
+
+        :returns: IOU command line (string)
+        """
+
+        return " ".join(self._build_command())
+
+    def delete(self):
+        """
+        Deletes this IOU device.
+        """
+
+        self.stop()
+        self._instances.remove(self._id)
+        log.info("IOU device {name} [id={id}] has been deleted".format(name=self._name,
+                                                                       id=self._id))
+
+    def _update_iouyap_config(self):
+        """
+        Updates the iouyap.ini file.
+        """
+
+        iouyap_ini = os.path.join(self._working_dir, "iouyap.ini")
+
+        config = configparser.ConfigParser()
+        config["default"] = {"netmap": "NETMAP",
+                             "base_port": "49000"}
+
+        bay_id = 0
+        for adapter in self._slots:
+            unit_id = 0
+            for unit in adapter.ports.keys():
+                nio = adapter.get_nio(unit)
+                if nio:
+                    #TODO: handle TAP and Ethernet NIOs
+                    tunnel = {"tunnel_udp": "{lport}:{rhost}:{rport}".format(lport=nio.lport,
+                                                                             rhost=nio.rhost,
+                                                                             rport=nio.rport)}
+
+                    config["{iouyap_id}:{bay}/{unit}".format(iouyap_id=str(self._id + 512), bay=bay_id, unit=unit_id)] = tunnel
+                unit_id += 1
+            bay_id += 1
+
+        try:
+            with open(iouyap_ini, "w") as config_file:
+                config.write(config_file)
+            log.info("IOU {name} [id={id}]: iouyap.ini updated".format(name=self._name,
+                                                                       id=self._id))
+        except EnvironmentError as e:
+            raise IOUError("Could not create {}: {}".format(iouyap_ini, e))
+
+    def _create_netmap_config(self):
+        """
+        Creates the NETMAP file.
+        """
+
+        netmap_path = os.path.join(self._working_dir, "NETMAP")
+        try:
+            with open(netmap_path, "w") as f:
+                for bay in range(0, 16):
+                    for unit in range(0, 4):
+                        f.write("{iouyap_id}:{bay}/{unit}{iou_id:>5d}:{bay}/{unit}\n".format(iouyap_id=str(self._id + 512),
+                                                                                             bay=bay,
+                                                                                             unit=unit,
+                                                                                             iou_id=self._id))
+            log.info("IOU {name} [id={id}]: NETMAP file created".format(name=self._name,
+                                                                        id=self._id))
+        except EnvironmentError as e:
+            raise IOUError("Could not create {}: {}".format(netmap_path, e))
+
+    def _start_ioucon(self):
+        """
+        Starts ioucon thread (for console connections).
+        """
+
+        if not self._ioucon_thead:
+            telnet_server = "{}:{}".format(self._host, self._console)
+            log.info("starting ioucon for IOU instance {} to accept Telnet connections on {}".format(self._name, telnet_server))
+            args = argparse.Namespace(appl_id=str(self._id), debug=False, escape='^^', telnet_limit=0, telnet_server=telnet_server)
+            self._ioucon_thread_stop_event = threading.Event()
+            self._ioucon_thead = threading.Thread(target=start_ioucon, args=(args, self._ioucon_thread_stop_event))
+            self._ioucon_thead.start()
+
+    def _start_iouyap(self):
+        """
+        Starts iouyap (handles connections to and from this IOU device).
+        """
+
+        try:
+            self._update_iouyap_config()
+            command = [self._iouyap, str(self._id + 512)]  # iouyap has always IOU ID + 512
+            log.info("starting iouyap: {}".format(command))
+            self._stdout_file = os.path.join(self._working_dir, "iouyap.log")
+            log.info("logging to {}".format(self._stdout_file))
+            with open(self._stdout_file, "w") as fd:
+                self._iouyap_process = subprocess.Popen(command,
+                                                        stdout=fd,
+                                                        stderr=subprocess.STDOUT,
+                                                        cwd=self._working_dir)
+
+            log.info("iouyap started PID={}".format(self._iouyap_process.pid))
+        except EnvironmentError as e:
+            log.error("could not start iouyap: {}".format(e))
+            raise IOUError("Could not start iouyap: {}".format(e))
+
+    def start(self):
+        """
+        Starts the IOU process.
+        """
+
+        if not self.is_running():
+            if not self._iourc or not os.path.exists(self._iourc):
+                raise IOUError("A iourc file is necessary to start IOU")
+
+            if not self._iouyap or not os.path.exists(self._iouyap):
+                raise IOUError("iouyap is necessary to start IOU")
+
+            self._create_netmap_config()
+            # created a environment variable pointing to the iourc file.
+            env = os.environ.copy()
+            env["IOURC"] = self._iourc
+            self._command = self._build_command()
+            try:
+                log.info("starting IOU: {}".format(self._command))
+                self._stdout_file = os.path.join(self._working_dir, "iou.log")
+                log.info("logging to {}".format(self._stdout_file))
+                with open(self._stdout_file, "w") as fd:
+                    self._process = subprocess.Popen(self._command,
+                                                     stdout=fd,
+                                                     stderr=subprocess.STDOUT,
+                                                     cwd=self._working_dir,
+                                                     env=env)
+                log.info("IOU instance {} started PID={}".format(self._id, self._process.pid))
+            except EnvironmentError as e:
+                log.error("could not start IOU: {}".format(e))
+                raise IOUError("could not start IOU: {}".format(e))
+
+            # start console support
+            self._start_ioucon()
+            # connections support
+            self._start_iouyap()
+
+    def stop(self):
+        """
+        Stops the IOU process.
+        """
+
+        # stop the IOU process
+        if self.is_running():
+            log.info("stopping IOU instance {} PID={}".format(self._id, self._process.pid))
+            try:
+                self._process.terminate()
+                self._process.wait(1)
+            except subprocess.TimeoutExpired:
+                self._process.kill()
+                if self._process.poll() == None:
+                    log.warn("IOU instance {} PID={} is still running".format(self._id,
+                                                                              self._process.pid))
+        self._process = None
+
+        # stop console support
+        if self._ioucon_thead:
+            self._ioucon_thread_stop_event.set()
+            if self._ioucon_thead.is_alive():
+                self._ioucon_thead.join(timeout=0.10)
+            self._ioucon_thead = None
+
+        # stop iouyap
+        if self.is_iouyap_running():
+            log.info("stopping iouyap PID={} for IOU instance {}".format(self._iouyap_process.pid, self._id))
+            try:
+                self._iouyap_process.terminate()
+                self._iouyap_process.wait(1)
+            except subprocess.TimeoutExpired:
+                self._iouyap_process.kill()
+                if self._iouyap_process.poll() == None:
+                    log.warn("iouyap PID={} for IOU instance {} is still running".format(self._iouyap_process.pid,
+                                                                                         self._id))
+        self._iouyap_process = None
+
+    def read_stdout(self):
+        """
+        Reads the standard output of the IOU process.
+        Only use when the process has been stopped or has crashed.
+        """
+
+        output = ""
+        if self._stdout_file:
+            try:
+                with open(self._stdout_file) as file:
+                    output = file.read()
+            except EnvironmentError as e:
+                log.warn("could not read {}: {}".format(self._stdout_file, e))
+        return output
+
+    def is_running(self):
+        """
+        Checks if the IOU process is running
+
+        :returns: True or False
+        """
+
+        if self._process and self._process.poll() == None:
+            return True
+        return False
+
+    def is_iouyap_running(self):
+        """
+        Checks if the iouyap process is running
+
+        :returns: True or False
+        """
+
+        if self._iouyap_process and self._iouyap_process.poll() == None:
+            return True
+        return False
+
+    def slot_add_nio_binding(self, slot_id, port_id, nio):
+        """
+        Adds a slot NIO binding.
+
+        :param slot_id: slot ID
+        :param port_id: port ID
+        :param nio: NIO instance to add to the slot/port
+        """
+
+        try:
+            adapter = self._slots[slot_id]
+        except IndexError:
+            raise IOUError("Slot {slot_id} doesn't exist on IOU {name}".format(name=self._name,
+                                                                               slot_id=slot_id))
+
+        if not adapter.port_exists(port_id):
+            raise IOUError("Port {port_id} doesn't exist in adapter {adapter}".format(adapter=adapter,
+                                                                                      port_id=port_id))
+
+        adapter.add_nio(port_id, nio)
+        log.info("IOU {name} [id={id}]: {nio} added to {slot_id}/{port_id}".format(name=self._name,
+                                                                                   id=self._id,
+                                                                                   nio=nio,
+                                                                                   slot_id=slot_id,
+                                                                                   port_id=port_id))
+        if self.is_iouyap_running():
+            self._update_iouyap_config()
+            os.kill(self._iouyap_process.pid, signal.SIGHUP)
+
+    def slot_remove_nio_binding(self, slot_id, port_id):
+        """
+        Removes a slot NIO binding.
+
+        :param slot_id: slot ID
+        :param port_id: port ID
+        """
+
+        try:
+            adapter = self._slots[slot_id]
+        except IndexError:
+            raise IOUError("Slot {slot_id} doesn't exist on IOU {name}".format(name=self._name,
+                                                                               slot_id=slot_id))
+
+        if not adapter.port_exists(port_id):
+            raise IOUError("Port {port_id} doesn't exist in adapter {adapter}".format(adapter=adapter,
+                                                                                      port_id=port_id))
+
+        nio = adapter.get_nio(port_id)
+        adapter.remove_nio(port_id)
+        log.info("IOU {name} [id={id}]: {nio} removed from {slot_id}/{port_id}".format(name=self._name,
+                                                                                       id=self._id,
+                                                                                       nio=nio,
+                                                                                       slot_id=slot_id,
+                                                                                       port_id=port_id))
+        if self.is_iouyap_running():
+            self._update_iouyap_config()
+            os.kill(self._iouyap_process.pid, signal.SIGHUP)
+
+    def _build_command(self):
+        """
+        Command to start the IOU process.
+        (to be passed to subprocess.Popen())
+
+        IOU command line:
+        Usage: <image> [options] <application id>
+        <image>: unix-js-m | unix-is-m | unix-i-m | ...
+        <application id>: instance identifier (0 < id <= 1024)
+        Options:
+        -e <n>        Number of Ethernet interfaces (default 2)
+        -s <n>        Number of Serial interfaces (default 2)
+        -n <n>        Size of nvram in Kb (default 64KB)
+        -b <string>   IOS debug string
+        -c <name>     Configuration file name
+        -d            Generate debug information
+        -t            Netio message trace
+        -q            Suppress informational messages
+        -h            Display this help
+        -C            Turn off use of host clock
+        -m <n>        Megabytes of router memory (default 256MB)
+        -L            Disable local console, use remote console
+        -l            Enable Layer 1 keepalive messages
+        -u <n>        UDP port base for distributed networks
+        -R            Ignore options from the IOURC file
+        -U            Disable unix: file system location
+        -W            Disable watchdog timer
+        -N            Ignore the NETMAP file
+        """
+
+        #TODO: add support for keepalive and watchdog
+        command = [self._path]
+        if len(self._ethernet_adapters) != 2:
+            command.extend(["-e", str(len(self._ethernet_adapters))])
+        if len(self._serial_adapters) != 2:
+            command.extend(["-s", str(len(self._serial_adapters))])
+        command.extend(["-n", str(self._nvram)])
+        command.extend(["-m", str(self._ram)])
+        command.extend(["-L"])  # disable local console, use remote console
+        if self._startup_config:
+            command.extend(["-c", self._startup_config])
+        command.extend([str(self._id)])
+        return command
+
+    @property
+    def ram(self):
+        """
+        Returns the amount of RAM allocated to this IOU instance.
+
+        :returns: amount of RAM in Mbytes (integer)
+        """
+
+        return self._ram
+
+    @ram.setter
+    def ram(self, ram):
+        """
+        Sets amount of RAM allocated to this IOU instance.
+
+        :param ram: amount of RAM in Mbytes (integer)
+        """
+
+        if self._ram == ram:
+            return
+
+        log.info("IOU {name} [id={id}]: RAM updated from {old_ram}MB to {new_ram}MB".format(name=self._name,
+                                                                                            id=self._id,
+                                                                                            old_ram=self._ram,
+                                                                                            new_ram=ram))
+
+        self._ram = ram
+
+    @property
+    def nvram(self):
+        """
+        Returns the mount of NVRAM allocated to this IOU instance.
+
+        :returns: amount of NVRAM in Kbytes (integer)
+        """
+
+        return self._nvram
+
+    @nvram.setter
+    def nvram(self, nvram):
+        """
+        Sets amount of NVRAM allocated to this IOU instance.
+
+        :param nvram: amount of NVRAM in Kbytes (integer)
+        """
+
+        if self._nvram == nvram:
+            return
+
+        log.info("IOU {name} [id={id}]: NVRAM updated from {old_nvram}KB to {new_nvram}KB".format(name=self._name,
+                                                                                                  id=self._id,
+                                                                                                  old_nvram=self._nvram,
+                                                                                                  new_nvram=nvram))
+        self._nvram = nvram
+
+    @property
+    def startup_config(self):
+        """
+        Returns the startup-config for this IOU instance.
+
+        :returns: path to startup-config file
+        """
+
+        return self._startup_config
+
+    @startup_config.setter
+    def startup_config(self, startup_config):
+        """
+        Sets the startup-config for this IOU instance.
+
+        :param startup_config: path to startup-config file
+        """
+
+        self._startup_config = startup_config
+        log.info("IOU {name} [id={id}]: startup_config set to {config}".format(name=self._name,
+                                                                                 id=self._id,
+                                                                                 config=self._startup_config))
+
+    @property
+    def ethernet_adapters(self):
+        """
+        Returns the number of Ethernet adapters for this IOU instance.
+
+        :returns: number of adapters
+        """
+
+        return len(self._ethernet_adapters)
+
+    @ethernet_adapters.setter
+    def ethernet_adapters(self, ethernet_adapters):
+        """
+        Sets the number of Ethernet adapters for this IOU instance.
+
+        :param ethernet_adapters: number of adapters
+        """
+
+        self._ethernet_adapters.clear()
+        for _ in range(0, ethernet_adapters):
+            self._ethernet_adapters.append(EthernetAdapter())
+
+        log.info("IOU {name} [id={id}]: number of Ethernet adapters changed to {adapters}".format(name=self._name,
+                                                                                                  id=self._id,
+                                                                                                  adapters=len(self._ethernet_adapters)))
+
+        self._slots = self._ethernet_adapters + self._serial_adapters
+
+    @property
+    def serial_adapters(self):
+        """
+        Returns the number of Serial adapters for this IOU instance.
+
+        :returns: number of adapters
+        """
+
+        return len(self._serial_adapters)
+
+    @serial_adapters.setter
+    def serial_adapters(self, serial_adapters):
+        """
+        Sets the number of Serial adapters for this IOU instance.
+
+        :param serial_adapters: number of adapters
+        """
+
+        self._serial_adapters.clear()
+        for _ in range(0, serial_adapters):
+            self._serial_adapters.append(SerialAdapter())
+
+        log.info("IOU {name} [id={id}]: number of Serial adapters changed to {adapters}".format(name=self._name,
+                                                                                                id=self._id,
+                                                                                                adapters=len(self._serial_adapters)))
+
+        self._slots = self._ethernet_adapters + self._serial_adapters
+
+    @staticmethod
+    def find_unused_port(start_port, end_port, host='127.0.0.1', socket_type="TCP"):
+        """
+        Finds an unused port in the specified range.
+
+        :param start_port: first port in the range
+        :param end_port: last port in the range
+        :param host: host/address for bind()
+        :param socket_type: TCP (default) or UDP
+        """
+
+        if socket_type == "UDP":
+            socket_type = socket.SOCK_DGRAM
+        else:
+            socket_type = socket.SOCK_STREAM
+
+        for port in range(start_port, end_port):
+            if port > end_port:
+                raise IOUError("Could not find a free port between {0} and {1}".format(start_port, end_port))
+            try:
+                if ":" in host:
+                    # IPv6 address support
+                    s = socket.socket(socket.AF_INET6, socket_type)
+                else:
+                    s = socket.socket(socket.AF_INET, socket_type)
+                # the port is available if bind is a success
+                s.bind((host, port))
+                return port
+            except socket.error as e:
+                if e.errno == errno.EADDRINUSE:  # socket already in use
+                    continue
+                else:
+                    raise IOUError("Could not find an unused port: {}".format(e))

gns3server/modules/iou/iou_error.py

@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Custom exceptions for IOU module.
+"""
+
+
+class IOUError(Exception):
+
+    def __init__(self, message, original_exception=None):
+
+        Exception.__init__(self, message)
+        self._message = message
+        self._original_exception = original_exception
+
+    def __repr__(self):
+
+        return self._message
+
+    def __str__(self):
+
+        return self._message

gns3server/modules/iou/ioucon.py

@@ -0,0 +1,645 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2014 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# Contribution from James Carpenter
+#
+
+import socket
+import sys
+import os
+import select
+import fcntl
+import struct
+import termios
+import tty
+import time
+import argparse
+import traceback
+
+
+import logging
+log = logging.getLogger(__name__)
+
+
+# Escape characters
+ESC_CHAR = '^^'         # can be overriden from command line
+ESC_QUIT = 'q'
+
+# IOU seems to only send *1* byte at a time. If
+# they ever fix that we'll be ready for it.
+BUFFER_SIZE = 1024
+
+# How long to wait before retrying a connection (seconds)
+RETRY_DELAY = 3
+
+# How often to test an idle connection (seconds)
+POLL_TIMEOUT = 3
+
+
+EXIT_SUCCESS = 0
+EXIT_FAILURE = 1
+EXIT_ABORT = 2
+
+# Mostly from:
+# https://code.google.com/p/miniboa/source/browse/trunk/miniboa/telnet.py
+#--[ Telnet Commands ]---------------------------------------------------------
+SE     = 240 # End of subnegotiation parameters
+NOP    = 241 # No operation
+DATMK  = 242 # Data stream portion of a sync.
+BREAK  = 243 # NVT Character BRK
+IP     = 244 # Interrupt Process
+AO     = 245 # Abort Output
+AYT    = 246 # Are you there
+EC     = 247 # Erase Character
+EL     = 248 # Erase Line
+GA     = 249 # The Go Ahead Signal
+SB     = 250 # Sub-option to follow
+WILL   = 251 # Will; request or confirm option begin
+WONT   = 252 # Wont; deny option request
+DO     = 253 # Do = Request or confirm remote option
+DONT   = 254 # Don't = Demand or confirm option halt
+IAC    = 255 # Interpret as Command
+SEND   = 1   # Sub-process negotiation SEND command
+IS     = 0   # Sub-process negotiation IS command
+#--[ Telnet Options ]----------------------------------------------------------
+BINARY = 0   # Transmit Binary
+ECHO   = 1   # Echo characters back to sender
+RECON  = 2   # Reconnection
+SGA    = 3   # Suppress Go-Ahead
+TMARK  = 6   # Timing Mark
+TTYPE  = 24  # Terminal Type
+NAWS   = 31  # Negotiate About Window Size
+LINEMO = 34  # Line Mode
+
+
+class FileLock:
+
+    # struct flock {       /* from fcntl(2) */
+    #     ...
+    #     short l_type;    /* Type of lock: F_RDLCK,
+    #                         F_WRLCK, F_UNLCK */
+    #     short l_whence;  /* How to interpret l_start:
+    #                         SEEK_SET, SEEK_CUR, SEEK_END */
+    #     off_t l_start;   /* Starting offset for lock */
+    #     off_t l_len;     /* Number of bytes to lock */
+    #     pid_t l_pid;     /* PID of process blocking our lock
+    #                         (F_GETLK only) */
+    #     ...
+    # };
+    _flock = struct.Struct('hhqql')
+
+    def __init__(self, fname=None):
+        self.fd = None
+        self.fname = fname
+
+    def get_lock(self):
+        flk = self._flock.pack(fcntl.F_WRLCK, os.SEEK_SET,
+                               0, 0, os.getpid())
+        flk = self._flock.unpack(
+            fcntl.fcntl(self.fd, fcntl.F_GETLK, flk))
+
+        # If it's not locked (or is locked by us) then return None,
+        # otherwise return the PID of the owner.
+        if flk[0] == fcntl.F_UNLCK:
+            return None
+        return flk[4]
+
+    def lock(self):
+        try:
+            self.fd = open('{}.lck'.format(self.fname), 'a')
+        except Exception as e:
+            raise LockError("Couldn't get lock on {}: {}"
+                            .format(self.fname, e))
+
+        flk = self._flock.pack(fcntl.F_WRLCK, os.SEEK_SET, 0, 0, 0)
+        try:
+            fcntl.fcntl(self.fd, fcntl.F_SETLK, flk)
+        except BlockingIOError:
+            raise LockError("Already connected. PID {} has lock on {}"
+                            .format(self.get_lock(), self.fname))
+
+        # If we got here then we must have the lock. Store the PID.
+        self.fd.truncate(0)
+        self.fd.write('{}\n'.format(os.getpid()))
+        self.fd.flush()
+
+    def unlock(self):
+        if self.fd:
+            # Deleting first prevents a race condition
+            os.unlink(self.fd.name)
+            self.fd.close()
+
+    def __enter__(self):
+        self.lock()
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.unlock()
+        return False
+
+
+class Console:
+    def fileno(self):
+        raise NotImplementedError("Only routers have fileno()")
+
+
+class Router:
+    pass
+
+
+class TTY(Console):
+
+    def read(self, fileno, bufsize):
+        return self.fd.read(bufsize)
+
+    def write(self, buf):
+        return self.fd.write(buf)
+
+    def register(self, epoll):
+        self.epoll = epoll
+        epoll.register(self.fd, select.EPOLLIN | select.EPOLLET)
+
+    def __enter__(self):
+        try:
+            self.fd = open('/dev/tty', 'r+b', buffering=0)
+        except OSError as e:
+            raise TTYError("Couldn't open controlling TTY: {}".format(e))
+
+        # Save original flags
+        self.termios = termios.tcgetattr(self.fd)
+        self.fcntl = fcntl.fcntl(self.fd, fcntl.F_GETFL)
+
+        # Update flags
+        tty.setraw(self.fd, termios.TCSANOW)
+        fcntl.fcntl(self.fd, fcntl.F_SETFL, self.fcntl | os.O_NONBLOCK)
+
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+
+        # Restore flags to original settings
+        termios.tcsetattr(self.fd, termios.TCSANOW, self.termios)
+        fcntl.fcntl(self.fd, fcntl.F_SETFL, self.fcntl)
+
+        self.fd.close()
+
+        return False
+
+
+class TelnetServer(Console):
+
+    def __init__(self, addr, port, stop_event):
+        self.addr = addr
+        self.port = port
+        self.fd_dict = {}
+        self.stop_event = stop_event
+
+    def read(self, fileno, bufsize):
+        # Someone wants to connect?
+        if fileno == self.sock_fd.fileno():
+            self._accept()
+            return None
+
+        self._cur_fileno = fileno
+
+        # Read a maximum of _bufsize_ bytes without blocking. When it
+        # would want to block it means there's no more data. An empty
+        # buffer normally means that we've been disconnected.
+        try:
+            buf = self._read_cur(bufsize, socket.MSG_DONTWAIT)
+        except BlockingIOError:
+            return None
+        if not buf:
+            self._disconnect(fileno)
+
+        # Process and remove any telnet commands from the buffer
+        if IAC in buf:
+            buf = self._IAC_parser(buf)
+
+        return buf
+
+    def write(self, buf):
+        for fd in self.fd_dict.values():
+            fd.send(buf)
+
+    def register(self, epoll):
+        self.epoll = epoll
+        epoll.register(self.sock_fd, select.EPOLLIN)
+
+    def _read_block(self, bufsize):
+        buf = self._read_cur(bufsize, socket.MSG_WAITALL)
+        # If we don't get everything we were looking for then the
+        # client probably disconnected.
+        if len(buf) < bufsize:
+            self._disconnect(self._cur_fileno)
+        return buf
+
+    def _read_cur(self, bufsize, flags):
+        return self.fd_dict[self._cur_fileno].recv(bufsize, flags)
+
+    def _write_cur(self, buf):
+        return self.fd_dict[self._cur_fileno].send(buf)
+
+    def _IAC_parser(self, buf):
+        skip_to = 0
+        while not self.stop_event.is_set():
+            # Locate an IAC to process
+            iac_loc = buf.find(IAC, skip_to)
+            if iac_loc < 0:
+                break
+
+            # Get the TELNET command
+            iac_cmd = bytearray([IAC])
+            try:
+                iac_cmd.append(buf[iac_loc + 1])
+            except IndexError:
+                buf.extend(self._read_block(1))
+                iac_cmd.append(buf[iac_loc + 1])
+
+            # Is this just a 2-byte TELNET command?
+            if iac_cmd[1] not in [WILL, WONT, DO, DONT]:
+                if iac_cmd[1] == AYT:
+                    log.debug("Telnet server received Are-You-There (AYT)")
+                    self._write_cur(
+                        b'\r\nYour Are-You-There received. I am here.\r\n'
+                    )
+                elif iac_cmd[1] == IAC:
+                    # It's data, not an IAC
+                    iac_cmd.pop()
+                    # This prevents the 0xff from being
+                    # interputed as yet another IAC
+                    skip_to = iac_loc + 1
+                    log.debug("Received IAC IAC")
+                elif iac_cmd[1] == NOP:
+                    pass
+                else:
+                    log.debug("Unhandled telnet command: "
+                              "{0:#x} {1:#x}".format(*iac_cmd))
+
+            # This must be a 3-byte TELNET command
+            else:
+                try:
+                    iac_cmd.append(buf[iac_loc + 2])
+                except IndexError:
+                    buf.extend(self._read_block(1))
+                    iac_cmd.append(buf[iac_loc + 2])
+                # We do ECHO, SGA, and BINARY. Period.
+                if (iac_cmd[1] == DO
+                    and iac_cmd[2] not in [ECHO, SGA, BINARY]):
+
+                    self._write_cur(bytes([IAC, WONT, iac_cmd[2]]))
+                    log.debug("Telnet WON'T {:#x}".format(iac_cmd[2]))
+                else:
+                    log.debug("Unhandled telnet command: "
+                              "{0:#x} {1:#x} {2:#x}".format(*iac_cmd))
+
+            # Remove the entire TELNET command from the buffer
+            buf = buf.replace(iac_cmd, b'', 1)
+
+        # Return the new copy of the buffer, minus telnet commands
+        return buf
+
+    def _accept(self):
+        fd, addr = self.sock_fd.accept()
+        self.fd_dict[fd.fileno()] = fd
+        self.epoll.register(fd, select.EPOLLIN | select.EPOLLET)
+
+        log.info("Telnet connection from {}:{}".format(addr[0], addr[1]))
+
+        # This is a one-way negotiation. This is very basic so there
+        # shouldn't be any problems with any decent client.
+        fd.send(bytes([IAC, WILL, ECHO,
+                       IAC, WILL, SGA,
+                       IAC, WILL, BINARY,
+                       IAC, DO,   BINARY]))
+
+        if args.telnet_limit and len(self.fd_dict) > args.telnet_limit:
+            fd.send(b'\r\nToo many connections\r\n')
+            self._disconnect(fd.fileno())
+            log.warn("Client disconnected because of too many connections. "
+                     "(limit currently {})".format(args.telnet_limit))
+
+    def _disconnect(self, fileno):
+        fd = self.fd_dict.pop(fileno)
+        log.info("Telnet client disconnected")
+        fd.shutdown(socket.SHUT_RDWR)
+        fd.close()
+
+    def __enter__(self):
+        # Open a socket and start listening
+        sock_fd = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        sock_fd.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        try:
+            sock_fd.bind((self.addr, self.port))
+        except OSError:
+            raise TelnetServerError("Cannot bind to {}:{}"
+                                    .format(self.addr, self.port))
+
+        sock_fd.listen(socket.SOMAXCONN)
+        self.sock_fd = sock_fd
+        log.info("Telnet server ready for connections on {}:{}".format(self.addr, self.port))
+
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        for fileno in list(self.fd_dict.keys()):
+            self._disconnect(fileno)
+        self.sock_fd.close()
+        return False
+
+
+class IOU(Router):
+
+    def __init__(self, ttyC, ttyS, stop_event):
+        self.ttyC = ttyC
+        self.ttyS = ttyS
+        self.stop_event = stop_event
+
+    def read(self, bufsize):
+        try:
+            buf = self.fd.recv(bufsize)
+        except BlockingIOError:
+            return None
+        return buf
+
+    def write(self, buf):
+        self.fd.send(buf)
+
+    def _open(self):
+        self.fd = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
+        self.fd.setblocking(False)
+
+    def _bind(self):
+        try:
+            os.unlink(self.ttyC)
+        except FileNotFoundError:
+            pass
+        except Exception as e:
+            raise NetioError("Couldn't unlink socket {}: {}"
+                             .format(self.ttyC, e))
+
+        try:
+            self.fd.bind(self.ttyC)
+        except Exception as e:
+            raise NetioError("Couldn't create socket {}: {}"
+                             .format(self.ttyC, e))
+
+    def _connect(self):
+        # Keep trying until we connect or die trying
+        while not self.stop_event.is_set():
+            try:
+                self.fd.connect(self.ttyS)
+            except FileNotFoundError:
+                log.debug("Waiting to connect to {}".format(self.ttyS),
+                          file=sys.stderr)
+                time.sleep(RETRY_DELAY)
+            except Exception as e:
+                raise NetioError("Couldn't connect to socket {}: {}"
+                                 .format(self.ttyS, e))
+            else:
+                break
+
+    def register(self, epoll):
+        self.epoll = epoll
+        epoll.register(self.fd, select.EPOLLIN | select.EPOLLET)
+
+    def fileno(self):
+        return self.fd.fileno()
+
+    def __enter__(self):
+        self._open()
+        self._bind()
+        self._connect()
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        os.unlink(self.ttyC)
+        self.fd.close()
+        return False
+
+
+class IOUConError(Exception):
+    pass
+
+
+class LockError(IOUConError):
+    pass
+
+
+class NetioError(IOUConError):
+    pass
+
+
+class TTYError(IOUConError):
+    pass
+
+
+class TelnetServerError(IOUConError):
+    pass
+
+
+class ConfigError(IOUConError):
+    pass
+
+
+def mkdir_netio(netio_dir):
+    try:
+        os.mkdir(netio_dir)
+    except FileExistsError:
+        pass
+    except Exception as e:
+        raise NetioError("Couldn't create directory {}: {}"
+                         .format(netio_dir, e))
+
+
+def send_recv_loop(console, router, esc_char, stop_event):
+
+    epoll = select.epoll()
+    router.register(epoll)
+    console.register(epoll)
+
+    router_fileno = router.fileno()
+    esc_quit = bytes(ESC_QUIT.upper(), 'ascii')
+    esc_state = False
+
+    while not stop_event.is_set():
+        event_list = epoll.poll(timeout=POLL_TIMEOUT)
+
+        # When/if the poll times out we send an empty datagram. If IOU
+        # has gone away then this will toss a ConnectionRefusedError
+        # exception.
+        if not event_list:
+            router.write(b'')
+            continue
+
+        for fileno, event in event_list:
+            buf = bytearray()
+
+            # IOU --> tty(s)
+            if fileno == router_fileno:
+                while not stop_event.is_set():
+                    data = router.read(BUFFER_SIZE)
+                    if not data:
+                        break
+                    buf.extend(data)
+                console.write(buf)
+
+            # tty --> IOU
+            else:
+                while not stop_event.is_set():
+                    data = console.read(fileno, BUFFER_SIZE)
+                    if not data:
+                        break
+                    buf.extend(data)
+
+                # If we just received the escape character then
+                # enter the escape state.
+                #
+                # If we are in the escape state then check for a
+                # quit command. Or if it's the escape character then
+                # send the escape character. Else, send the escape
+                # character we ate earlier and whatever character we
+                # just got. Exit escape state.
+                #
+                # If we're not in the escape state and this isn't an
+                # escape character then just send it to IOU.
+                if esc_state:
+                    if buf.upper() == esc_quit:
+                        sys.exit(EXIT_SUCCESS)
+                    elif buf == esc_char:
+                        router.write(esc_char)
+                    else:
+                        router.write(esc_char)
+                        router.write(buf)
+                    esc_state = False
+                elif buf == esc_char:
+                    esc_state = True
+                else:
+                    router.write(buf)
+
+
+def get_args():
+    parser = argparse.ArgumentParser(
+        description='Connect to an IOU console port.')
+    parser.add_argument('-d', '--debug', action='store_true',
+                        help='display some debugging information')
+    parser.add_argument('-e', '--escape',
+                        help='set escape character (default: %(default)s)',
+                        default=ESC_CHAR, metavar='CHAR')
+    parser.add_argument('-t', '--telnet-server',
+                        help='start telnet server listening on ADDR:PORT',
+                        metavar='ADDR:PORT', default=False)
+    parser.add_argument('-l', '--telnet-limit',
+                        help='maximum number of simultaneous '
+                        'telnet connections (default: %(default)s)',
+                        metavar='LIMIT', type=int, default=1)
+    parser.add_argument('appl_id', help='IOU instance identifier')
+    return parser.parse_args()
+
+
+def get_escape_character(escape):
+
+    # Figure out the escape character to use.
+    # Can be any ASCII character or a spelled out control
+    # character, like "^e". The string "none" disables it.
+    if escape.lower() == 'none':
+        esc_char = b''
+    elif len(escape) == 2 and escape[0] == '^':
+        c = ord(escape[1].upper()) - 0x40
+        if not 0 <= c <= 0x1f:  # control code range
+            raise ConfigError("Invalid control code")
+        esc_char = bytes([c])
+    elif len(escape) == 1:
+        try:
+            esc_char = bytes(escape, 'ascii')
+        except ValueError as e:
+            raise ConfigError("Invalid escape character") from e
+    else:
+        raise ConfigError("Invalid length for escape character")
+
+    return esc_char
+
+
+def start_ioucon(cmdline_args, stop_event):
+
+    global args
+    args = cmdline_args
+
+    if args.debug:
+        logging.basicConfig(level=logging.DEBUG)
+    else:
+        # default logging level
+        logging.basicConfig(level=logging.INFO)
+
+    # Create paths for the Unix domain sockets
+    netio = '/tmp/netio{}'.format(os.getuid())
+    ttyC = '{}/ttyC{}'.format(netio, args.appl_id)
+    ttyS = '{}/ttyS{}'.format(netio, args.appl_id)
+
+    try:
+        mkdir_netio(netio)
+        with FileLock(ttyC):
+            esc_char = get_escape_character(args.escape)
+
+            if args.telnet_server:
+                addr, _, port = args.telnet_server.partition(':')
+                nport = 0
+                try:
+                    nport = int(port)
+                except ValueError:
+                    pass
+                if (addr == '' or nport == 0):
+                    raise ConfigError('format for --telnet-server must be '
+                                      'ADDR:PORT (like 127.0.0.1:20000)')
+
+            while not stop_event.is_set():
+                try:
+                    if args.telnet_server:
+                        with TelnetServer(addr, nport, stop_event) as console:
+                            with IOU(ttyC, ttyS, stop_event) as router:
+                                send_recv_loop(console, router, b'', stop_event)
+                    else:
+                        with TTY() as console, IOU(ttyC, ttyS, stop_event) as router:
+                            send_recv_loop(console, router, esc_char, stop_event)
+                except ConnectionRefusedError:
+                    pass
+                except KeyboardInterrupt:
+                    sys.exit(EXIT_ABORT)
+                finally:
+                    # Put us at the beginning of a line
+                    if not args.telnet_server:
+                        print()
+
+    except IOUConError as e:
+        if args.debug:
+            traceback.print_exc(file=sys.stderr)
+        else:
+            print(e, file=sys.stderr)
+        sys.exit(EXIT_FAILURE)
+
+    log.info("exiting...")
+
+
+def main():
+
+    import threading
+    stop_event = threading.Event()
+    args = get_args()
+    start_ioucon(args, stop_event)
+
+if __name__ == '__main__':
+    main()

gns3server/modules/iou/nios/nio_udp.py

@@ -0,0 +1,75 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Interface for UDP NIOs.
+"""
+
+import logging
+log = logging.getLogger(__name__)
+
+
+class NIO_UDP(object):
+    """
+    IOU UDP NIO.
+
+    :param lport: local port number
+    :param rhost: remote address/host
+    :param rport: remote port number
+    """
+
+    _instance_count = 0
+
+    def __init__(self, lport, rhost, rport):
+
+        self._lport = lport
+        self._rhost = rhost
+        self._rport = rport
+
+    @property
+    def lport(self):
+        """
+        Returns the local port
+
+        :returns: local port number
+        """
+
+        return self._lport
+
+    @property
+    def rhost(self):
+        """
+        Returns the remote host
+
+        :returns: remote address/host
+        """
+
+        return self._rhost
+
+    @property
+    def rport(self):
+        """
+        Returns the remote port
+
+        :returns: remote port number
+        """
+
+        return self._rport
+
+    def __str__(self):
+
+        return "NIO UDP"

gns3server/server.py

@@ -16,7 +16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
-Set up and run the server
+Set up and run the server.
 """
 
 import zmq
@@ -24,6 +24,7 @@ from zmq.eventloop import ioloop, zmqstream
 ioloop.install()
 
 import os
+import tempfile
 import signal
 import errno
 import functools
@@ -31,8 +32,10 @@ import socket
 import tornado.ioloop
 import tornado.web
 import tornado.autoreload
+from .config import Config
 from .handlers.jsonrpc_websocket import JSONRPCWebSocket
 from .handlers.version_handler import VersionHandler
+from .handlers.file_upload_handler import FileUploadHandler
 from .module_manager import ModuleManager
 
 import logging
@@ -42,7 +45,8 @@ log = logging.getLogger(__name__)
 class Server(object):
 
     # built-in handlers
-    handlers = [(r"/version", VersionHandler)]
+    handlers = [(r"/version", VersionHandler),
+                (r"/upload", FileUploadHandler)]
 
     def __init__(self, host, port, ipc=False):
 
@@ -62,6 +66,20 @@ class Server(object):
         self._ipc = ipc
         self._modules = []
 
+        # get the projects and temp directories from the configuration file (passed to the modules)
+        config = Config.instance()
+        server_config = config.get_default_section()
+        # default projects directory is "~/Documents/GNS3/projects"
+        self._projects_dir = os.path.expandvars(os.path.expanduser(server_config.get("projects_directory", "~/Documents/GNS3/projects")))
+        self._temp_dir = server_config.get("temporary_directory", tempfile.gettempdir())
+
+        if not os.path.exists(self._projects_dir):
+            try:
+                os.makedirs(self._projects_dir)
+                log.info("projects directory '{}' created".format(self._projects_dir))
+            except EnvironmentError as e:
+                log.error("could not create the projects directory {}: {}".format(self._projects_dir, e))
+
     def load_modules(self):
         """
         Loads the modules.
@@ -73,7 +91,13 @@ class Server(object):
         module_manager = ModuleManager([module_path])
         module_manager.load_modules()
         for module in module_manager.get_all_modules():
-            instance = module_manager.activate_module(module, ("127.0.0.1", self._zmq_port))
+            instance = module_manager.activate_module(module,
+                                                      "127.0.0.1",  # ZeroMQ server address
+                                                      self._zmq_port,  # ZeroMQ server port
+                                                      projects_dir=self._projects_dir,
+                                                      temp_dir=self._temp_dir)
+            if not instance:
+                continue
             self._modules.append(instance)
             destinations = instance.destinations()
             for destination in destinations:

setup.py

@@ -65,11 +65,8 @@ setup(
         'Natural Language :: English',
         "Operating System :: OS Independent",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.3",
         "Programming Language :: Python :: Implementation :: CPython",
-        "Programming Language :: Python :: Implementation :: PyPy",
         ],
 )

tests/iou/test_iou_device.py

@@ -0,0 +1,29 @@
+from gns3server.modules.iou import IOUDevice
+import os
+import pytest
+
+
+@pytest.fixture(scope="session")
+def iou(request):
+
+    cwd = os.path.dirname(os.path.abspath(__file__))
+    iou_path = os.path.join(cwd, "i86bi_linux-ipbase-ms-12.4.bin")
+    iou_device = IOUDevice(iou_path, "/tmp")
+    iou_device.start()
+    request.addfinalizer(iou_device.delete)
+    return iou_device
+
+
+def test_iou_is_started(iou):
+
+    print(iou.command())
+    assert iou.id == 1  # we should have only one IOU running!
+    assert iou.is_running()
+
+
+def test_iou_restart(iou):
+
+    iou.stop()
+    assert not iou.is_running()
+    iou.start()
+    assert iou.is_running()