Ranges for UDP, console, auxiliary console and hypervisor ports.

Dynamips UDP NIO auto back-end for UDP tunnel connections (excepting
stubs).

gns3server/modules/attic.py

@@ -0,0 +1,66 @@
+# -*- 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/>.
+
+"""
+Useful functions... in the attic ;)
+"""
+
+import socket
+import errno
+
+
+def find_unused_port(start_port, end_port, host='127.0.0.1', socket_type="TCP", ignore_ports=[]):
+    """
+    Finds an unused port in a 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
+    :param ignore_ports: list of port to ignore within the range
+    """
+
+    if end_port < start_port:
+        raise Exception("Invalid port range {}-{}".format(start_port, end_port))
+
+    if socket_type == "UDP":
+        socket_type = socket.SOCK_DGRAM
+    else:
+        socket_type = socket.SOCK_STREAM
+
+    for port in range(start_port, end_port + 1):
+        if port in ignore_ports:
+            continue
+        try:
+            if ":" in host:
+                # IPv6 address support
+                with socket.socket(socket.AF_INET6, socket_type) as s:
+                    s.bind((host, port))  # the port is available if bind is a success
+            else:
+                with socket.socket(socket.AF_INET, socket_type) as s:
+                    s.bind((host, port))  # the port is available if bind is a success
+            return port
+        except OSError as e:
+            if e.errno == errno.EADDRINUSE:  # socket already in use
+                if port + 1 == end_port:
+                    break
+                else:
+                    continue
+            else:
+                raise Exception("Could not find an unused port: {}".format(e))
+
+    raise Exception("Could not find a free port between {0} and {1}".format(start_port, end_port))

gns3server/modules/dynamips/__init__.py

@@ -326,18 +326,18 @@ class Dynamips(IModule):
         :returns: a NIO object
         """
 
-        #TODO: JSON schema validation
         nio = None
         if request["nio"]["type"] == "nio_udp":
             lport = request["nio"]["lport"]
             rhost = request["nio"]["rhost"]
             rport = request["nio"]["rport"]
+            # check if we have an allocated NIO UDP auto
+            nio = node.hypervisor.get_nio_udp_auto(lport)
+            if not nio:
+                # otherwise create an NIO UDP
                 nio = NIO_UDP(node.hypervisor, lport, rhost, rport)
-#         elif request["nio"] == "nio_udp_auto":
+            else:
-#             lhost = request["lhost"]
+                nio.connect(rhost, rport)
-#             lport_start = request["lport_start"]
-#             lport_end = request["lport_end"]
-#             nio = NIO_UDP_auto(node.hypervisor, lhost, lport_start, lport_end)
         elif request["nio"]["type"] == "nio_generic_ethernet":
             ethernet_device = request["nio"]["ethernet_device"]
             nio = NIO_GenericEthernet(node.hypervisor, ethernet_device)
@@ -379,20 +379,6 @@ class Dynamips(IModule):
 
         return response
 
-#     def allocate_udp_port_auto(self, node, lport_start, lport_end):
-#         """
-#         Allocates a UDP port in order to create an UDP NIO Auto.
-# 
-#         :param node: the node that needs to allocate an UDP port
-#         """
-# 
-#         self._nio_udp_auto = NIO_UDP_auto(node.hypervisor, node.hypervisor.host, lport_start, lport_end)
-# 
-#         response = {"lport": self._nio_udp_auto.lport,
-#                     "lhost": self._nio_udp_auto.lhost}
-# 
-#         return response
-
     def set_ghost_ios(self, router):
         """
         Manages Ghost IOS support.

gns3server/modules/dynamips/dynamips_error.py

@@ -25,6 +25,8 @@ class DynamipsError(Exception):
     def __init__(self, message, original_exception=None):
 
         Exception.__init__(self, message)
+        if isinstance(message, Exception):
+            message = str(message)
         self._message = message
         self._original_exception = original_exception
 

gns3server/modules/dynamips/dynamips_hypervisor.py

@@ -21,10 +21,10 @@ http://github.com/GNS3/dynamips/blob/master/README.hypervisor#L46
 """
 
 import socket
-import errno
 import re
 import logging
 from .dynamips_error import DynamipsError
+from .nios.nio_udp_auto import NIO_UDP_auto
 
 log = logging.getLogger(__name__)
 
@@ -53,10 +53,13 @@ class DynamipsHypervisor(object):
         self._ghosts = {}
         self._jitsharing_groups = {}
         self._working_dir = working_dir
-        self._baseconsole = 2000
+        self._console_start_port_range = 2001
-        self._baseaux = 2100
+        self._console_end_port_range = 2500
-        self._baseudp = 10000
+        self._aux_start_port_range = 2501
-        self._current_udp_port = self._baseudp
+        self._aux_end_port_range = 3000
+        self._udp_start_port_range = 10001
+        self._udp_end_port_range = 20000
+        self._nio_udp_auto_instances = {}
         self._version = "N/A"
         self._timeout = 30
         self._socket = None
@@ -136,6 +139,7 @@ class DynamipsHypervisor(object):
         self.send("hypervisor stop")
         self._socket.close()
         self._socket = None
+        self._nio_udp_auto_instances.clear()
 
     def reset(self):
         """
@@ -143,6 +147,7 @@ class DynamipsHypervisor(object):
         """
 
         self.send('hypervisor reset')
+        self._nio_udp_auto_instances.clear()
 
     @property
     def working_dir(self):
@@ -220,68 +225,124 @@ class DynamipsHypervisor(object):
         self._devices = devices
 
     @property
-    def baseconsole(self):
+    def console_start_port_range(self):
         """
-        Returns base console TCP port for this hypervisor.
+        Returns the console start port range value
 
-        :returns: base console value (integer)
+        :returns: console start port range value (integer)
         """
 
-        return self._baseconsole
+        return self._console_start_port_range
 
-    @baseconsole.setter
+    @console_start_port_range.setter
-    def baseconsole(self, baseconsole):
+    def console_start_port_range(self, console_start_port_range):
         """
-        Sets the base console TCP port for this hypervisor.
+        Set a new console start port range value
 
-        :param baseconsole: base console value (integer)
+        :param console_start_port_range: console start port range value (integer)
         """
 
-        self._baseconsole = baseconsole
+        self._console_start_port_range = console_start_port_range
 
     @property
-    def baseaux(self):
+    def console_end_port_range(self):
         """
-        Returns base auxiliary port for this hypervisor.
+        Returns the console end port range value
 
-        :returns: base auxiliary port value (integer)
+        :returns: console end port range value (integer)
         """
 
-        return self._baseaux
+        return self._console_end_port_range
 
-    @baseaux.setter
+    @console_end_port_range.setter
-    def baseaux(self, baseaux):
+    def console_end_port_range(self, console_end_port_range):
         """
-        Sets the base auxiliary TCP port for this hypervisor.
+        Set a new console end port range value
 
-        :param baseaux: base auxiliary port value (integer)
+        :param console_end_port_range: console end port range value (integer)
         """
 
-        self._baseaux = baseaux
+        self._console_end_port_range = console_end_port_range
 
     @property
-    def baseudp(self):
+    def aux_start_port_range(self):
         """
-        Returns the next available UDP port for UDP NIOs.
+        Returns the auxiliary console start port range value
 
-        :returns: base UDP port value (integer)
+        :returns: auxiliary console  start port range value (integer)
         """
 
-        return self._baseudp
+        return self._aux_start_port_range
 
-    @baseudp.setter
+    @aux_start_port_range.setter
-    def baseudp(self, baseudp):
+    def aux_start_port_range(self, aux_start_port_range):
         """
-        Sets the next open UDP port for NIOs for this hypervisor.
+        Sets a new auxiliary console start port range value
 
-        :param baseudp: base UDP port value (integer)
+        :param aux_start_port_range: auxiliary console start port range value (integer)
         """
 
-        self._baseudp = baseudp
+        self._aux_start_port_range = aux_start_port_range
-        self._current_udp_port = self._baseudp
 
-        #FIXME
+    @property
-        log.info("hypervisor a new base UDP {}".format(self._baseudp))
+    def aux_end_port_range(self):
+        """
+        Returns the auxiliary console end port range value
+
+        :returns: auxiliary console end port range value (integer)
+        """
+
+        return self._aux_end_port_range
+
+    @aux_end_port_range.setter
+    def aux_end_port_range(self, aux_end_port_range):
+        """
+        Sets a new auxiliary console end port range value
+
+        :param aux_end_port_range: auxiliary console end port range value (integer)
+        """
+
+        self._aux_end_port_range = aux_end_port_range
+
+    @property
+    def udp_start_port_range(self):
+        """
+        Returns the UDP start port range value
+
+        :returns: UDP start port range value (integer)
+        """
+
+        return self._udp_start_port_range
+
+    @udp_start_port_range.setter
+    def udp_start_port_range(self, udp_start_port_range):
+        """
+        Sets a new UDP start port range value
+
+        :param udp_start_port_range: UDP start port range value (integer)
+        """
+
+        self._udp_start_port_range = udp_start_port_range
+
+    @property
+    def udp_end_port_range(self):
+        """
+        Returns the UDP end port range value
+
+        :returns: UDP end port range value (integer)
+        """
+
+        return self._udp_end_port_range
+
+    @udp_end_port_range.setter
+    def udp_end_port_range(self, udp_end_port_range):
+        """
+        Sets an new UDP end port range value
+
+        :param udp_end_port_range: UDP end port range value (integer)
+        """
+
+        self._udp_end_port_range = udp_end_port_range
 
     @property
     def ghosts(self):
@@ -343,58 +404,29 @@ class DynamipsHypervisor(object):
 
         return self._port
 
-    @staticmethod
+    def get_nio_udp_auto(self, port):
-    def find_unused_port(start_port, end_port, host='127.0.0.1', socket_type="TCP"):
         """
-        Finds an unused port in a range.
+        Returns an allocated NIO UDP auto instance.
 
-        :param start_port: first port in the range
+        :returns: NIO UDP auto instance
-        :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":
+        if port in self._nio_udp_auto_instances:
-            socket_type = socket.SOCK_DGRAM
+            return self._nio_udp_auto_instances.pop(port)
         else:
-            socket_type = socket.SOCK_STREAM
+            return None
 
-        for port in range(start_port, end_port):
+    def allocate_udp_port(self):
-            try:
-                if ":" in host:
-                    # IPv6 address support
-                    with socket.socket(socket.AF_INET6, socket_type) as s:
-                        s.bind((host, port))  # the port is available if bind is a success
-                else:
-                    with socket.socket(socket.AF_INET, socket_type) as s:
-                        s.bind((host, port))  # the port is available if bind is a success
-                return port
-            except OSError as e:
-                if e.errno == errno.EADDRINUSE:  # socket already in use
-                    if port + 1 == end_port:
-                        raise DynamipsError("Could not find a free port between {0} and {1}".format(start_port, end_port))
-                    else:
-                        continue
-                else:
-                    raise DynamipsError("Could not find an unused port: {}".format(e))
-
-    def allocate_udp_port(self, max_port=100):
         """
-        Allocates a new UDP port for creating an UDP NIO.
+        Allocates a new UDP port for creating an UDP NIO Auto.
-
-        :param max_port: maximum number of port to scan in
-        order to find one available for use.
 
         :returns: port number (integer)
         """
 
-        start_port = self._current_udp_port
+        # use Dynamips's NIO UDP auto back-end.
-        end_port = start_port + max_port
+        nio = NIO_UDP_auto(self, self._host, self._udp_start_port_range, self._udp_end_port_range)
-        allocated_port = DynamipsHypervisor.find_unused_port(start_port, end_port, self._host, socket_type="UDP")
+        self._nio_udp_auto_instances[nio.lport] = nio
-        if allocated_port - self._current_udp_port > 1:
+        allocated_port = nio.lport
-            self._current_udp_port += allocated_port - self._current_udp_port
-        else:
-            self._current_udp_port += 1
         return allocated_port
 
     def send_raw(self, string):

gns3server/modules/dynamips/hypervisor_manager.py

@@ -21,6 +21,7 @@ Manages Dynamips hypervisors (load-balancing etc.)
 
 from .hypervisor import Hypervisor
 from .dynamips_error import DynamipsError
+from ..attic import find_unused_port
 from pkg_resources import parse_version
 
 import os
@@ -44,26 +45,20 @@ class HypervisorManager(object):
     :param base_udp: base UDP port for UDP tunnels
     """
 
-    def __init__(self,
+    def __init__(self, path, working_dir, host='127.0.0.1'):
-                 path,
-                 working_dir,
-                 host='127.0.0.1',
-                 base_hypervisor_port=7200,
-                 base_console_port=2000,
-                 base_aux_port=3000,
-                 base_udp_port=10000):
 
         self._hypervisors = []
         self._path = path
         self._working_dir = working_dir
         self._host = host
-        self._base_hypervisor_port = base_hypervisor_port
+        self._hypervisor_start_port_range = 7200
-        self._current_port = self._base_hypervisor_port
+        self._hypervisor_end_port_range = 7700
-        self._base_console_port = base_console_port
+        self._console_start_port_range = 2001
-        self._base_aux_port = base_aux_port
+        self._console_end_port_range = 2500
-        self._base_udp_port = base_udp_port
+        self._aux_start_port_range = 2501
-        self._current_base_udp_port = self._base_udp_port
+        self._aux_end_port_range = 3000
-        self._udp_incrementation_per_hypervisor = 100
+        self._udp_start_port_range = 10001
+        self._udp_end_port_range = 20000
         self._ghost_ios_support = True
         self._mmap_support = True
         self._jit_sharing_support = False
@@ -136,94 +131,204 @@ class HypervisorManager(object):
             hypervisor.working_dir = self._working_dir
 
     @property
-    def base_hypervisor_port(self):
+    def hypervisor_start_port_range(self):
         """
-        Returns the base hypervisor port.
+        Returns the hypervisor start port range value
 
-        :returns: base hypervisor port (integer)
+        :returns: hypervisor start port range value (integer)
         """
 
-        return self._base_hypervisor_port
+        return self._hypervisor_start_port_range
 
-    @base_hypervisor_port.setter
+    @hypervisor_start_port_range.setter
-    def base_hypervisor_port(self, base_hypervisor_port):
+    def hypervisor_start_port_range(self, hypervisor_start_port_range):
         """
-        Set a new base hypervisor port.
+        Sets a new hypervisor start port range value
 
-        :param base_hypervisor_port: base hypervisor port (integer)
+        :param hypervisor_start_port_range: hypervisor start port range value (integer)
         """
 
-        if self._base_hypervisor_port != base_hypervisor_port:
+        if self._hypervisor_start_port_range != hypervisor_start_port_range:
-            self._base_hypervisor_port = base_hypervisor_port
+            self._hypervisor_start_port_range = hypervisor_start_port_range
-            self._current_port = self._base_hypervisor_port
+            log.info("hypervisor start port range value set to {}".format(self._hypervisor_start_port_range))
-            log.info("base hypervisor port set to {}".format(self._base_hypervisor_port))
 
     @property
-    def base_console_port(self):
+    def hypervisor_end_port_range(self):
         """
-        Returns the base console port.
+        Returns the hypervisor end port range value
 
-        :returns: base console port (integer)
+        :returns: hypervisor end port range value (integer)
         """
 
-        return self._base_console_port
+        return self._hypervisor_end_port_range
 
-    @base_console_port.setter
+    @hypervisor_end_port_range.setter
-    def base_console_port(self, base_console_port):
+    def hypervisor_end_port_range(self, hypervisor_end_port_range):
         """
-        Set a new base console port.
+        Sets a new hypervisor end port range value
 
-        :param base_console_port: base console port (integer)
+        :param hypervisor_end_port_range: hypervisor end port range value (integer)
         """
 
-        if self._base_console_port != base_console_port:
+        if self._hypervisor_end_port_range != hypervisor_end_port_range:
-            self._base_console_port = base_console_port
+            self._hypervisor_end_port_range = hypervisor_end_port_range
-            log.info("base console port set to {}".format(self._base_console_port))
+            log.info("hypervisor end port range value set to {}".format(self._hypervisor_end_port_range))
 
     @property
-    def base_aux_port(self):
+    def console_start_port_range(self):
         """
-        Returns the base auxiliary console port.
+        Returns the console start port range value
 
-        :returns: base auxiliary console  port (integer)
+        :returns: console start port range value (integer)
         """
 
-        return self._base_aux_port
+        return self._console_start_port_range
 
-    @base_aux_port.setter
+    @console_start_port_range.setter
-    def base_aux_port(self, base_aux_port):
+    def console_start_port_range(self, console_start_port_range):
         """
-        Set a new base auxiliary console port.
+        Sets a new console start port range value
 
-        :param base_aux_port: base auxiliary console port (integer)
+        :param console_start_port_range: console start port range value (integer)
         """
 
-        if self._base_aux_port != base_aux_port:
+        if self._console_start_port_range != console_start_port_range:
-            self._base_aux_port = base_aux_port
+            self._console_start_port_range = console_start_port_range
-            log.info("base aux port set to {}".format(self._base_aux_port))
+            log.info("console start port range value set to {}".format(self._console_start_port_range))
+
+            # update all existing hypervisors with the new value
+            for hypervisor in self._hypervisors:
+                hypervisor.console_start_port_range = console_start_port_range
 
     @property
-    def base_udp_port(self):
+    def console_end_port_range(self):
         """
-        Returns the base UDP port.
+        Returns the console end port range value
 
-        :returns: base UDP  port (integer)
+        :returns: console end port range value (integer)
         """
 
-        return self._base_udp_port
+        return self._console_end_port_range
 
-    @base_udp_port.setter
+    @console_end_port_range.setter
-    def base_udp_port(self, base_udp_port):
+    def console_end_port_range(self, console_end_port_range):
         """
-        Set a new base UDP port.
+        Sets a new console end port range value
 
-        :param base_udp_port: base UDP port (integer)
+        :param console_end_port_range: console end port range value (integer)
         """
 
-        if self._base_udp_port != base_udp_port:
+        if self._console_end_port_range != console_end_port_range:
-            self._base_udp_port = base_udp_port
+            self._console_end_port_range = console_end_port_range
-            self._current_base_udp_port = self._base_udp_port
+            log.info("console end port range value set to {}".format(self._console_end_port_range))
-            log.info("base UDP port set to {}".format(self._base_udp_port))
+
+            # update all existing hypervisors with the new value
+            for hypervisor in self._hypervisors:
+                hypervisor.console_end_port_range = console_end_port_range
+
+    @property
+    def aux_start_port_range(self):
+        """
+        Returns the auxiliary console start port range value
+
+        :returns: auxiliary console  start port range value (integer)
+        """
+
+        return self._aux_start_port_range
+
+    @aux_start_port_range.setter
+    def aux_start_port_range(self, aux_start_port_range):
+        """
+        Sets a new auxiliary console start port range value
+
+        :param aux_start_port_range: auxiliary console start port range value (integer)
+        """
+
+        if self._aux_start_port_range != aux_start_port_range:
+            self._aux_start_port_range = aux_start_port_range
+            log.info("auxiliary console start port range value set to {}".format(self._aux_start_port_range))
+
+            # update all existing hypervisors with the new value
+            for hypervisor in self._hypervisors:
+                hypervisor.aux_start_port_range = aux_start_port_range
+
+    @property
+    def aux_end_port_range(self):
+        """
+        Returns the auxiliary console end port range value
+
+        :returns: auxiliary console end port range value (integer)
+        """
+
+        return self._aux_end_port_range
+
+    @aux_end_port_range.setter
+    def aux_end_port_range(self, aux_end_port_range):
+        """
+        Sets a new auxiliary console end port range value
+
+        :param aux_end_port_range: auxiliary console end port range value (integer)
+        """
+
+        if self._aux_end_port_range != aux_end_port_range:
+            self._aux_end_port_range = aux_end_port_range
+            log.info("auxiliary console end port range value set to {}".format(self._aux_end_port_range))
+
+            # update all existing hypervisors with the new value
+            for hypervisor in self._hypervisors:
+                hypervisor.aux_end_port_range = aux_end_port_range
+
+    @property
+    def udp_start_port_range(self):
+        """
+        Returns the UDP start port range value
+
+        :returns: UDP start port range value (integer)
+        """
+
+        return self._udp_start_port_range
+
+    @udp_start_port_range.setter
+    def udp_start_port_range(self, udp_start_port_range):
+        """
+        Sets a new UDP start port range value
+
+        :param udp_start_port_range: UDP start port range value (integer)
+        """
+
+        if self._udp_start_port_range != udp_start_port_range:
+            self._udp_start_port_range = udp_start_port_range
+            log.info("UDP start port range value set to {}".format(self._udp_start_port_range))
+
+            # update all existing hypervisors with the new value
+            for hypervisor in self._hypervisors:
+                hypervisor.udp_start_port_range = udp_start_port_range
+
+    @property
+    def udp_end_port_range(self):
+        """
+        Returns the UDP end port range value
+
+        :returns: UDP end port range value (integer)
+        """
+
+        return self._udp_end_port_range
+
+    @udp_end_port_range.setter
+    def udp_end_port_range(self, udp_end_port_range):
+        """
+        Sets a new UDP end port range value
+
+        :param udp_end_port_range: UDP end port range value (integer)
+        """
+
+        if self._udp_end_port_range != udp_end_port_range:
+            self._udp_end_port_range = udp_end_port_range
+            log.info("UDP end port range value set to {}".format(self._udp_end_port_range))
+
+            # update all existing hypervisors with the new value
+            for hypervisor in self._hypervisors:
+                hypervisor.udp_end_port_range = udp_end_port_range
 
     @property
     def ghost_ios_support(self):
@@ -436,25 +541,6 @@ class HypervisorManager(object):
         else:
             log.info("Dynamips server ready after {:.4f} seconds".format(time.time() - begin))
 
-    def allocate_tcp_port(self, max_port=100):
-        """
-        Allocates a new TCP port for a Dynamips hypervisor.
-
-        :param max_port: maximum number of port to scan in
-        order to find one available for use.
-
-        :returns: port number (integer)
-        """
-
-        start_port = self._current_port
-        end_port = start_port + max_port
-        allocated_port = Hypervisor.find_unused_port(start_port, end_port, self._host)
-        if allocated_port - self._current_port > 1:
-            self._current_port += allocated_port - self._current_port
-        else:
-            self._current_port += 1
-        return allocated_port
-
     def start_new_hypervisor(self):
         """
         Creates a new Dynamips process and start it.
@@ -462,7 +548,11 @@ class HypervisorManager(object):
         :returns: the new hypervisor instance
         """
 
-        port = self.allocate_tcp_port()
+        try:
+            port = find_unused_port(self._hypervisor_start_port_range, self._hypervisor_end_port_range, self._host)
+        except Exception as e:
+            raise DynamipsError(e)
+
         hypervisor = Hypervisor(self._path,
                                 self._working_dir,
                                 self._host,
@@ -477,10 +567,13 @@ class HypervisorManager(object):
         hypervisor.connect()
         if parse_version(hypervisor.version) < parse_version('0.2.11'):
             raise DynamipsError("Dynamips version must be >= 0.2.11, detected version is {}".format(hypervisor.version))
-        hypervisor.baseconsole = self._base_console_port
+
-        hypervisor.baseaux = self._base_aux_port
+        hypervisor.console_start_port_range = self._console_start_port_range
-        hypervisor.baseudp = self._current_base_udp_port
+        hypervisor.console_end_port_range = self._console_end_port_range
-        self._current_base_udp_port += self._udp_incrementation_per_hypervisor
+        hypervisor.aux_start_port_range = self._aux_start_port_range
+        hypervisor.aux_end_port_range = self._aux_end_port_range
+        hypervisor.udp_start_port_range = self._udp_start_port_range
+        hypervisor.udp_end_port_range = self._udp_end_port_range
         self._hypervisors.append(hypervisor)
         return hypervisor
 

gns3server/modules/dynamips/nodes/router.py

@@ -20,8 +20,9 @@ Interface for Dynamips virtual Machine module ("vm")
 http://github.com/GNS3/dynamips/blob/master/README.hypervisor#L77
 """
 
-from ..dynamips_hypervisor import DynamipsHypervisor
 from ..dynamips_error import DynamipsError
+from ...attic import find_unused_port
+
 import time
 import sys
 import os
@@ -41,6 +42,8 @@ class Router(object):
     """
 
     _allocated_names = []
+    _allocated_console_ports = []
+    _allocated_aux_ports = []
     _instance_count = 1
     _status = {0: "inactive",
                1: "shutting down",
@@ -103,9 +106,29 @@ class Router(object):
                                                                                   platform=platform,
                                                                                   id=self._id))
 
-            # get console and aux ports
+            try:
-            self.console = (self._hypervisor.baseconsole - 1) + self._id
+                # allocate a console port
-            self.aux = (self._hypervisor.baseaux - 1) + self._id
+                self._console = find_unused_port(self._hypervisor.console_start_port_range,
+                                                 self._hypervisor.console_end_port_range,
+                                                 self._hypervisor.host,
+                                                 ignore_ports=self._allocated_console_ports)
+
+                self._hypervisor.send("vm set_con_tcp_port {name} {console}".format(name=self._name,
+                                                                                    console=self._console))
+                self._allocated_console_ports.append(self._console)
+
+                # allocate a auxiliary console port
+                self._aux = find_unused_port(self._hypervisor.aux_start_port_range,
+                                             self._hypervisor.aux_end_port_range,
+                                             self._hypervisor.host,
+                                             ignore_ports=self._allocated_aux_ports)
+
+                self._hypervisor.send("vm set_aux_tcp_port {name} {aux}".format(name=self._name,
+                                                                                aux=self._aux))
+
+                self._allocated_aux_ports.append(self._aux)
+            except Exception as e:
+                raise DynamipsError(e)
 
             # get the default base MAC address
             self._mac_addr = self._hypervisor.send("{platform} get_mac_addr {name}".format(platform=self._platform,
@@ -124,6 +147,8 @@ class Router(object):
 
         cls._instance_count = 1
         cls._allocated_names.clear()
+        cls._allocated_console_ports.clear()
+        cls._allocated_aux_ports.clear()
 
     def defaults(self):
         """
@@ -260,6 +285,10 @@ class Router(object):
 
         log.info("router {name} [id={id}] has been deleted".format(name=self._name, id=self._id))
         self._allocated_names.remove(self.name)
+        if self.console:
+            self._allocated_console_ports.remove(self.console)
+        if self.aux:
+            self._allocated_aux_ports.remove(self.aux)
 
     def start(self):
         """
@@ -285,20 +314,6 @@ class Router(object):
             if elf_header_start != b'\x7fELF\x01\x02\x01':
                 raise DynamipsError("'{}' is not a valid IOU image".format(self._image))
 
-            if self.console and self.aux:
-                # check that console and aux ports are available
-                try:
-                    #FIXME: use a defined range
-                    DynamipsHypervisor.find_unused_port(self.console, self.console + 100, self._hypervisor.host)
-                except DynamipsError:
-                    raise DynamipsError("console port {} is not available".format(self.console))
-
-                try:
-                    #FIXME: use a defined range
-                    DynamipsHypervisor.find_unused_port(self.aux, self.aux + 100, self._hypervisor.host)
-                except DynamipsError:
-                    raise DynamipsError("aux port {} is not available".format(self.aux))
-
             self._hypervisor.send("vm start {}".format(self._name))
             log.info("router {name} [id={id}] has been started".format(name=self._name, id=self._id))
 
@@ -1021,6 +1036,9 @@ class Router(object):
         if console == self._console:
             return
 
+        if console in self._allocated_console_ports:
+            raise DynamipsError("Console port {} is already used by another router".format(console))
+
         self._hypervisor.send("vm set_con_tcp_port {name} {console}".format(name=self._name,
                                                                             console=console))
 
@@ -1028,7 +1046,9 @@ class Router(object):
                                                                                                             id=self._id,
                                                                                                             old_console=self._console,
                                                                                                             new_console=console))
+        self._allocated_console_ports.remove(self._console)
         self._console = console
+        self._allocated_console_ports.append(self._console)
 
     @property
     def aux(self):
@@ -1051,6 +1071,9 @@ class Router(object):
         if aux == self._aux:
             return
 
+        if aux in self._allocated_aux_ports:
+            raise DynamipsError("Auxiliary console port {} is already used by another router".format(aux))
+
         self._hypervisor.send("vm set_aux_tcp_port {name} {aux}".format(name=self._name,
                                                                         aux=aux))
 
@@ -1058,7 +1081,10 @@ class Router(object):
                                                                                                 id=self._id,
                                                                                                 old_aux=self._aux,
                                                                                                 new_aux=aux))
+
+        self._allocated_aux_ports.remove(self._aux)
         self._aux = aux
+        self._allocated_aux_ports.append(self._aux)
 
     def get_cpu_info(self, cpu_id=0):
         """

gns3server/modules/iou/__init__.py

@@ -30,12 +30,13 @@ import shutil
 
 from gns3server.modules import IModule
 from gns3server.config import Config
+import gns3server.jsonrpc as jsonrpc
 from .iou_device import IOUDevice
 from .iou_error import IOUError
 from .nios.nio_udp import NIO_UDP
 from .nios.nio_tap import NIO_TAP
 from .nios.nio_generic_ethernet import NIO_GenericEthernet
-import gns3server.jsonrpc as jsonrpc
+from ..attic import find_unused_port
 
 from .schemas import IOU_CREATE_SCHEMA
 from .schemas import IOU_DELETE_SCHEMA
@@ -90,6 +91,7 @@ class IOU(IModule):
         self._iou_instances = {}
         self._console_start_port_range = 4001
         self._console_end_port_range = 4512
+        self._allocated_console_ports = []
         self._current_console_port = self._console_start_port_range
         self._udp_start_port_range = 30001
         self._udp_end_port_range = 40001
@@ -299,9 +301,12 @@ class IOU(IModule):
 
             iou_instance = IOUDevice(iou_path, self._working_dir, host=self._host, name=name)
             # find a console port
-            if self._current_console_port >= self._console_end_port_range:
+            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)
+            try:
+                iou_instance.console = find_unused_port(self._current_console_port, self._console_end_port_range, self._host)
+            except Exception as e:
+                raise IOUError(e)
             self._current_console_port += 1
         except IOUError as e:
             self.send_custom_error(str(e))
@@ -532,7 +537,10 @@ class IOU(IModule):
             # 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")
+            try:
+                port = find_unused_port(self._current_udp_port, self._udp_end_port_range, host=self._host, socket_type="UDP")
+            except Exception as e:
+                raise IOUError(e)
             self._current_udp_port += 1
 
             log.info("{} [id={}] has allocated UDP port {} with host {}".format(iou_instance.name,

gns3server/modules/iou/iou_device.py

@@ -22,8 +22,6 @@ order to run an IOU instance.
 
 import os
 import re
-import socket
-import errno
 import signal
 import subprocess
 import argparse
@@ -813,38 +811,3 @@ class IOUDevice(object):
                                                                                                 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):
-            try:
-                if ":" in host:
-                    # IPv6 address support
-                    with socket.socket(socket.AF_INET6, socket_type) as s:
-                        s.bind((host, port))   # the port is available if bind is a success
-                else:
-                    with socket.socket(socket.AF_INET, socket_type) as s:
-                        s.bind((host, port))   # the port is available if bind is a success
-                return port
-            except OSError as e:
-                if e.errno == errno.EADDRINUSE:  # socket already in use
-                    if port + 1 == end_port:
-                        raise IOUError("Could not find a free port between {0} and {1}".format(start_port, end_port))
-                    else:
-                        continue
-                else:
-                    raise IOUError("Could not find an unused port: {}".format(e))

gns3server/modules/iou/iou_error.py

@@ -25,6 +25,8 @@ class IOUError(Exception):
     def __init__(self, message, original_exception=None):
 
         Exception.__init__(self, message)
+        if isinstance(message, Exception):
+            message = str(message)
         self._message = message
         self._original_exception = original_exception
 

gns3server/version.py

@@ -23,5 +23,5 @@
 # or negative for a release candidate or beta (after the base version
 # number has been incremented)
 
-__version__ = "1.0a3.dev2"
+__version__ = "1.0a3.dev3"
 __version_info__ = (1, 0, 0, -99)