mirror of
https://github.com/markqvist/Reticulum.git
synced 2024-09-12 08:40:04 +00:00
817 lines
31 KiB
Python
Executable File
817 lines
31 KiB
Python
Executable File
from .Interfaces import *
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import configparser
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from .vendor.configobj import ConfigObj
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import RNS
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import atexit
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import struct
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import array
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import os.path
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import os
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import RNS
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class Reticulum:
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"""
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This class is used to initialise access to Reticulum within a
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program. You must create exactly one instance of this class before
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carrying out any other RNS operations, such as creating destinations
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or sending traffic. Every independently executed program must create
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their own instance of the Reticulum class, but Reticulum will
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automatically handle inter-program communication on the same system,
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and expose all connected programs to external interfaces as well.
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As soon as an instance of this class is created, Reticulum will start
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opening and configuring any hardware devices specified in the supplied
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configuration.
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Currently the first running instance must be kept running while other
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local instances are connected, as the first created instance will
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act as a master instance that directly communicates with external
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hardware such as modems, TNCs and radios. If a master instance is
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asked to exit, it will not exit until all client processes have
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terminated (unless killed forcibly).
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If you are running Reticulum on a system with several different
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programs that use RNS starting and terminating at different times,
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it will be advantageous to run a master RNS instance as a daemon for
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other programs to use on demand.
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"""
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# Future minimum will probably be locked in at 244 bytes to support
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# networks with segments of different MTUs. Absolute minimum is 211.
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MTU = 500
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"""
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The MTU that Reticulum adheres to, and will expect other peers to
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adhere to. By default, the MTU is 500 bytes. In custom RNS network
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implementations, it is possible to change this value, but doing so will
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completely break compatibility with all other RNS networks. An identical
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MTU is a prerequisite for peers to communicate in the same network.
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Unless you really know what you are doing, the MTU should be left at
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the default value.
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"""
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# Length of truncated hashes in bits.
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TRUNCATED_HASHLENGTH = 80
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HEADER_MINSIZE = 2+1+(TRUNCATED_HASHLENGTH//8)*1
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HEADER_MAXSIZE = 2+1+(TRUNCATED_HASHLENGTH//8)*2
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MDU = MTU - HEADER_MAXSIZE
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router = None
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config = None
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# The default configuration path will be expanded to a directory
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# named ".reticulum" inside the current users home directory
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configdir = os.path.expanduser("~")+"/.reticulum"
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configpath = ""
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storagepath = ""
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cachepath = ""
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@staticmethod
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def exit_handler():
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# This exit handler is called whenever Reticulum is asked to
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# shut down, and will in turn call exit handlers in other
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# classes, saving necessary information to disk and carrying
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# out cleanup operations.
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RNS.Transport.exit_handler()
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RNS.Identity.exit_handler()
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def __init__(self,configdir=None):
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"""
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Initialises and starts a Reticulum instance. This must be
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done before any other operations, and Reticulum will not
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pass any traffic before being instantiated.
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:param configdir: Full path to a Reticulum configuration directory.
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"""
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if configdir != None:
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Reticulum.configdir = configdir
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Reticulum.configpath = Reticulum.configdir+"/config"
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Reticulum.storagepath = Reticulum.configdir+"/storage"
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Reticulum.cachepath = Reticulum.configdir+"/storage/cache"
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Reticulum.resourcepath = Reticulum.configdir+"/storage/resources"
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Reticulum.__transport_enabled = False
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Reticulum.__use_implicit_proof = True
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Reticulum.panic_on_interface_error = False
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self.local_interface_port = 37428
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self.share_instance = True
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self.is_shared_instance = False
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self.is_connected_to_shared_instance = False
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self.is_standalone_instance = False
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if not os.path.isdir(Reticulum.storagepath):
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os.makedirs(Reticulum.storagepath)
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if not os.path.isdir(Reticulum.cachepath):
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os.makedirs(Reticulum.cachepath)
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if not os.path.isdir(Reticulum.resourcepath):
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os.makedirs(Reticulum.resourcepath)
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if os.path.isfile(self.configpath):
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try:
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self.config = ConfigObj(self.configpath)
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except Exception as e:
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RNS.log("Could not parse the configuration at "+self.configpath, RNS.LOG_ERROR)
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RNS.log("Check your configuration file for errors!", RNS.LOG_ERROR)
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RNS.panic()
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else:
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RNS.log("Could not load config file, creating default configuration file...")
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self.__create_default_config()
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RNS.log("Default config file created. Make any necessary changes in "+Reticulum.configdir+"/config and start Reticulum again.")
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RNS.log("Exiting now!")
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exit(1)
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self.__apply_config()
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RNS.log("Configuration loaded from "+self.configpath, RNS.LOG_VERBOSE)
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RNS.Identity.load_known_destinations()
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RNS.Transport.start(self)
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atexit.register(Reticulum.exit_handler)
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def __start_local_interface(self):
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if self.share_instance:
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try:
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interface = LocalInterface.LocalServerInterface(
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RNS.Transport,
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self.local_interface_port
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)
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interface.OUT = True
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RNS.Transport.interfaces.append(interface)
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self.is_shared_instance = True
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RNS.log("Started shared instance interface: "+str(interface), RNS.LOG_DEBUG)
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except Exception as e:
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try:
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interface = LocalInterface.LocalClientInterface(
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RNS.Transport,
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"Local shared instance",
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self.local_interface_port)
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interface.target_port = self.local_interface_port
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interface.OUT = True
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RNS.Transport.interfaces.append(interface)
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self.is_shared_instance = False
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self.is_standalone_instance = False
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self.is_connected_to_shared_instance = True
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RNS.log("Connected to local shared instance via: "+str(interface), RNS.LOG_DEBUG)
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except Exception as e:
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RNS.log("Local shared instance appears to be running, but it could not be connected", RNS.LOG_ERROR)
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RNS.log("The contained exception was: "+str(e), RNS.LOG_ERROR)
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self.is_shared_instance = False
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self.is_standalone_instance = True
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self.is_connected_to_shared_instance = False
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else:
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self.is_shared_instance = False
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self.is_standalone_instance = True
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self.is_connected_to_shared_instance = False
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def __apply_config(self):
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if "logging" in self.config:
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for option in self.config["logging"]:
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value = self.config["logging"][option]
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if option == "loglevel":
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RNS.loglevel = int(value)
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if RNS.loglevel < 0:
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RNS.loglevel = 0
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if RNS.loglevel > 7:
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RNS.loglevel = 7
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if "reticulum" in self.config:
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for option in self.config["reticulum"]:
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value = self.config["reticulum"][option]
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if option == "share_instance":
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value = self.config["reticulum"].as_bool(option)
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self.share_instance = value
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if option == "shared_instance_port":
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value = int(self.config["reticulum"][option])
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self.local_interface_port = value
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if option == "enable_transport":
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v = self.config["reticulum"].as_bool(option)
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if v == True:
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Reticulum.__transport_enabled = True
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if option == "panic_on_interface_error":
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v = self.config["reticulum"].as_bool(option)
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if v == True:
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Reticulum.panic_on_interface_error = True
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if option == "use_implicit_proof":
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v = self.config["reticulum"].as_bool(option)
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if v == True:
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Reticulum.__use_implicit_proof = True
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if v == False:
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Reticulum.__use_implicit_proof = False
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self.__start_local_interface()
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if self.is_shared_instance or self.is_standalone_instance:
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interface_names = []
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for name in self.config["interfaces"]:
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if not name in interface_names:
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c = self.config["interfaces"][name]
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try:
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if ("interface_enabled" in c) and c.as_bool("interface_enabled") == True:
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if c["type"] == "UDPInterface":
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device = c["device"] if "device" in c else None
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port = int(c["port"]) if "port" in c else None
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listen_ip = c["listen_ip"] if "listen_ip" in c else None
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listen_port = int(c["listen_port"]) if "listen_port" in c else None
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forward_ip = c["forward_ip"] if "forward_ip" in c else None
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forward_port = int(c["forward_port"]) if "forward_port" in c else None
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if port != None:
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if listen_port == None:
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listen_port = port
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if forward_port == None:
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forward_port = port
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interface = UDPInterface.UDPInterface(
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RNS.Transport,
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name,
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device,
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listen_ip,
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listen_port,
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forward_ip,
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forward_port
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)
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if "outgoing" in c and c.as_bool("outgoing") == True:
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interface.OUT = True
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else:
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interface.OUT = False
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RNS.Transport.interfaces.append(interface)
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if c["type"] == "TCPServerInterface":
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device = c["device"] if "device" in c else None
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port = int(c["port"]) if "port" in c else None
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listen_ip = c["listen_ip"] if "listen_ip" in c else None
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listen_port = int(c["listen_port"]) if "listen_port" in c else None
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if port != None:
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listen_port = port
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interface = TCPInterface.TCPServerInterface(
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RNS.Transport,
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name,
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device,
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listen_ip,
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listen_port
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)
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if "outgoing" in c and c.as_bool("outgoing") == True:
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interface.OUT = True
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else:
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interface.OUT = False
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RNS.Transport.interfaces.append(interface)
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if c["type"] == "TCPClientInterface":
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interface = TCPInterface.TCPClientInterface(
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RNS.Transport,
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name,
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c["target_host"],
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int(c["target_port"])
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)
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if "outgoing" in c and c.as_bool("outgoing") == True:
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interface.OUT = True
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else:
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interface.OUT = False
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RNS.Transport.interfaces.append(interface)
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if c["type"] == "SerialInterface":
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port = c["port"] if "port" in c else None
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speed = int(c["speed"]) if "speed" in c else 9600
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databits = int(c["databits"]) if "databits" in c else 8
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parity = c["parity"] if "parity" in c else "N"
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stopbits = int(c["stopbits"]) if "stopbits" in c else 1
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if port == None:
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raise ValueError("No port specified for serial interface")
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interface = SerialInterface.SerialInterface(
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RNS.Transport,
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name,
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port,
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speed,
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databits,
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parity,
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stopbits
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)
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if "outgoing" in c and c.as_bool("outgoing") == True:
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interface.OUT = True
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else:
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interface.OUT = False
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RNS.Transport.interfaces.append(interface)
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if c["type"] == "KISSInterface":
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preamble = int(c["preamble"]) if "preamble" in c else None
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txtail = int(c["txtail"]) if "txtail" in c else None
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persistence = int(c["persistence"]) if "persistence" in c else None
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slottime = int(c["slottime"]) if "slottime" in c else None
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flow_control = c.as_bool("flow_control") if "flow_control" in c else False
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port = c["port"] if "port" in c else None
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speed = int(c["speed"]) if "speed" in c else 9600
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databits = int(c["databits"]) if "databits" in c else 8
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parity = c["parity"] if "parity" in c else "N"
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stopbits = int(c["stopbits"]) if "stopbits" in c else 1
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beacon_interval = int(c["id_interval"]) if "id_interval" in c else None
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beacon_data = c["id_callsign"] if "id_callsign" in c else None
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if port == None:
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raise ValueError("No port specified for serial interface")
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interface = KISSInterface.KISSInterface(
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RNS.Transport,
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name,
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port,
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speed,
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databits,
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parity,
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stopbits,
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preamble,
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txtail,
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persistence,
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slottime,
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flow_control,
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beacon_interval,
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beacon_data
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)
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if "outgoing" in c and c.as_bool("outgoing") == True:
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interface.OUT = True
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else:
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interface.OUT = False
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RNS.Transport.interfaces.append(interface)
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if c["type"] == "AX25KISSInterface":
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preamble = int(c["preamble"]) if "preamble" in c else None
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txtail = int(c["txtail"]) if "txtail" in c else None
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persistence = int(c["persistence"]) if "persistence" in c else None
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slottime = int(c["slottime"]) if "slottime" in c else None
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flow_control = c.as_bool("flow_control") if "flow_control" in c else False
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port = c["port"] if "port" in c else None
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speed = int(c["speed"]) if "speed" in c else 9600
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databits = int(c["databits"]) if "databits" in c else 8
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parity = c["parity"] if "parity" in c else "N"
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stopbits = int(c["stopbits"]) if "stopbits" in c else 1
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callsign = c["callsign"] if "callsign" in c else ""
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ssid = int(c["ssid"]) if "ssid" in c else -1
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if port == None:
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raise ValueError("No port specified for serial interface")
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interface = AX25KISSInterface.AX25KISSInterface(
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RNS.Transport,
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name,
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callsign,
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ssid,
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port,
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speed,
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databits,
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parity,
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stopbits,
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preamble,
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txtail,
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persistence,
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slottime,
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flow_control
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)
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if "outgoing" in c and c.as_bool("outgoing") == True:
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interface.OUT = True
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else:
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interface.OUT = False
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RNS.Transport.interfaces.append(interface)
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if c["type"] == "RNodeInterface":
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frequency = int(c["frequency"]) if "frequency" in c else None
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bandwidth = int(c["bandwidth"]) if "bandwidth" in c else None
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txpower = int(c["txpower"]) if "txpower" in c else None
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spreadingfactor = int(c["spreadingfactor"]) if "spreadingfactor" in c else None
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codingrate = int(c["codingrate"]) if "codingrate" in c else None
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flow_control = c.as_bool("flow_control") if "flow_control" in c else False
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id_interval = int(c["id_interval"]) if "id_interval" in c else None
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id_callsign = c["id_callsign"] if "id_callsign" in c else None
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port = c["port"] if "port" in c else None
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if port == None:
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raise ValueError("No port specified for RNode interface")
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interface = RNodeInterface.RNodeInterface(
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RNS.Transport,
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name,
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port,
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frequency = frequency,
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bandwidth = bandwidth,
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txpower = txpower,
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sf = spreadingfactor,
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cr = codingrate,
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flow_control = flow_control,
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id_interval = id_interval,
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id_callsign = id_callsign
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)
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if "outgoing" in c and c.as_bool("outgoing") == True:
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interface.OUT = True
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else:
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interface.OUT = False
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RNS.Transport.interfaces.append(interface)
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else:
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RNS.log("Skipping disabled interface \""+name+"\"", RNS.LOG_NOTICE)
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except Exception as e:
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RNS.log("The interface \""+name+"\" could not be created. Check your configuration file for errors!", RNS.LOG_ERROR)
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RNS.log("The contained exception was: "+str(e), RNS.LOG_ERROR)
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RNS.panic()
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else:
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RNS.log("The interface name \""+name+"\" was already used. Check your configuration file for errors!", RNS.LOG_ERROR)
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RNS.panic()
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def __create_default_config(self):
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self.config = ConfigObj(__default_rns_config__)
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self.config.filename = Reticulum.configpath
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if not os.path.isdir(Reticulum.configdir):
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os.makedirs(Reticulum.configdir)
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self.config.write()
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self.__apply_config()
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@staticmethod
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def should_use_implicit_proof():
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"""
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Returns whether proofs sent are explicit or implicit.
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:returns: True if the current running configuration specifies to use implicit proofs. False if not.
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"""
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return Reticulum.__use_implicit_proof
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@staticmethod
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def transport_enabled():
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"""
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Returns whether Transport is enabled for the running
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instance.
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When Transport is enabled, Reticulum will
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route traffic for other peers, respond to path requests
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and pass announces over the network.
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:returns: True if Transport is enabled, False if not.
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"""
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return Reticulum.__transport_enabled
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|
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# Default configuration file:
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__default_rns_config__ = '''# This is the default Reticulum config file.
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# You should probably edit it to include any additional,
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# interfaces and settings you might need.
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|
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[reticulum]
|
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|
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# If you enable Transport, your system will route traffic
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# for other peers, pass announces and serve path requests.
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# This should be done for systems that are suited to act
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# as transport nodes, ie. if they are stationary and
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# always-on. This directive is optional and can be removed
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|
# for brevity.
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|
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enable_transport = False
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|
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# By default, the first program to launch the Reticulum
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# Network Stack will create a shared instance, that other
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# programs can communicate with. Only the shared instance
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# opens all the configured interfaces directly, and other
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# local programs communicate with the shared instance over
|
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# a local socket. This is completely transparent to the
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# user, and should generally be turned on. This directive
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|
# is optional and can be removed for brevity.
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|
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share_instance = Yes
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|
|
|
|
# If you want to run multiple *different* shared instances
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|
# on the same system, you will need to specify different
|
|
# shared instance ports for each. The defaults are given
|
|
# below, and again, these options can be left out if you
|
|
# don't need them.
|
|
|
|
shared_instance_port = 37428
|
|
instance_control_port = 37429
|
|
|
|
# You can configure Reticulum to panic and forcibly close
|
|
# if an unrecoverable interface error occurs, such as the
|
|
# hardware device for an interface disappearing. This is
|
|
# an optional directive, and can be left out for brevity.
|
|
# This behaviour is disabled by default.
|
|
|
|
panic_on_interface_error = No
|
|
|
|
|
|
[logging]
|
|
# Valid log levels are 0 through 7:
|
|
# 0: Log only critical information
|
|
# 1: Log errors and lower log levels
|
|
# 2: Log warnings and lower log levels
|
|
# 3: Log notices and lower log levels
|
|
# 4: Log info and lower (this is the default)
|
|
# 5: Verbose logging
|
|
# 6: Debug logging
|
|
# 7: Extreme logging
|
|
|
|
loglevel = 4
|
|
|
|
|
|
# The interfaces section defines the physical and virtual
|
|
# interfaces Reticulum will use to communicate on. This
|
|
# section will contain examples for a variety of interface
|
|
# types. You can modify these or use them as a basis for
|
|
# your own config, or simply remove the unused ones.
|
|
|
|
[interfaces]
|
|
|
|
# This interface enables communication with other
|
|
# local Reticulum nodes over UDP. You can modify it
|
|
# to suit your needs or turn it off completely.
|
|
# As a minimum, you should probably specify the
|
|
# network device you want to communicate on, such
|
|
# as eth0 or wlan0.
|
|
|
|
[[Default UDP Interface]]
|
|
type = UDPInterface
|
|
interface_enabled = True
|
|
outgoing = True
|
|
listen_ip = 0.0.0.0
|
|
listen_port = 4242
|
|
forward_ip = 255.255.255.255
|
|
forward_port = 4242
|
|
|
|
# The above configuration will allow communication
|
|
# within the local broadcast domains of all local
|
|
# IP interfaces. This is enabled by default as an
|
|
# easy way to get started, but you might want to
|
|
# consider altering it to something more specific.
|
|
|
|
# Instead of specifying listen_ip, listen_port,
|
|
# forward_ip and forward_port, you can also bind
|
|
# to a specific network device like below.
|
|
|
|
# device = eth0
|
|
# port = 4242
|
|
|
|
# Assuming the eth0 device has the address
|
|
# 10.55.0.72/24, the above configuration would
|
|
# be equivalent to the following manual setup.
|
|
# Note that we are both listening and forwarding to
|
|
# the broadcast address of the network segments.
|
|
|
|
# listen_ip = 10.55.0.255
|
|
# listen_port = 4242
|
|
# forward_ip = 10.55.0.255
|
|
# forward_port = 4242
|
|
|
|
# You can of course also communicate only with
|
|
# a single IP address
|
|
|
|
# listen_ip = 10.55.0.15
|
|
# listen_port = 4242
|
|
# forward_ip = 10.55.0.16
|
|
# forward_port = 4242
|
|
|
|
|
|
# This example demonstrates a TCP server interface.
|
|
# It will listen for incoming connections on the
|
|
# specified IP address and port number.
|
|
|
|
[[TCP Server Interface]]
|
|
type = TCPServerInterface
|
|
interface_enabled = False
|
|
outgoing = True
|
|
|
|
# This configuration will listen on all IP
|
|
# interfaces on port 4242
|
|
|
|
listen_ip = 0.0.0.0
|
|
listen_port = 4242
|
|
|
|
# Alternatively you can bind to a specific IP
|
|
|
|
# listen_ip = 10.0.0.88
|
|
# listen_port = 4242
|
|
|
|
# Or a specific network device
|
|
|
|
# device = eth0
|
|
# port = 4242
|
|
|
|
|
|
# To connect to a TCP server interface, you would
|
|
# naturally use the TCP client interface. Here's
|
|
# an example. The target_host can either be an IP
|
|
# address or a hostname
|
|
|
|
[[TCP Client Interface]]
|
|
type = TCPClientInterface
|
|
interface_enabled = False
|
|
outgoing = True
|
|
target_host = 127.0.0.1
|
|
target_port = 4242
|
|
|
|
|
|
# Here's an example of how to add a LoRa interface
|
|
# using the RNode LoRa transceiver.
|
|
|
|
[[RNode LoRa Interface]]
|
|
type = RNodeInterface
|
|
|
|
# Enable interface if you want use it!
|
|
interface_enabled = False
|
|
|
|
# Allow transmit on interface. Setting
|
|
# this to false will create a listen-
|
|
# only interface.
|
|
outgoing = true
|
|
|
|
# Serial port for the device
|
|
port = /dev/ttyUSB0
|
|
|
|
# Set frequency to 867.2 MHz
|
|
frequency = 867200000
|
|
|
|
# Set LoRa bandwidth to 125 KHz
|
|
bandwidth = 125000
|
|
|
|
# Set TX power to 7 dBm (5 mW)
|
|
txpower = 7
|
|
|
|
# Select spreading factor 8. Valid
|
|
# range is 7 through 12, with 7
|
|
# being the fastest and 12 having
|
|
# the longest range.
|
|
spreadingfactor = 8
|
|
|
|
# Select coding rate 5. Valid range
|
|
# is 5 throough 8, with 5 being the
|
|
# fastest, and 8 the longest range.
|
|
codingrate = 5
|
|
|
|
# You can configure the RNode to send
|
|
# out identification on the channel with
|
|
# a set interval by configuring the
|
|
# following two parameters. The trans-
|
|
# ceiver will only ID if the set
|
|
# interval has elapsed since it's last
|
|
# actual transmission. The interval is
|
|
# configured in seconds.
|
|
# This option is commented out and not
|
|
# used by default.
|
|
# id_callsign = MYCALL-0
|
|
# id_interval = 600
|
|
|
|
# For certain homebrew RNode interfaces
|
|
# with low amounts of RAM, using packet
|
|
# flow control can be useful. By default
|
|
# it is disabled.
|
|
flow_control = False
|
|
|
|
|
|
# An example KISS modem interface. Useful for running
|
|
# Reticulum over packet radio hardware.
|
|
|
|
[[Packet Radio KISS Interface]]
|
|
type = KISSInterface
|
|
|
|
# Enable interface if you want use it!
|
|
interface_enabled = False
|
|
|
|
# Allow transmit on interface.
|
|
outgoing = true
|
|
|
|
# Serial port for the device
|
|
port = /dev/ttyUSB1
|
|
|
|
# Set the serial baud-rate and other
|
|
# configuration parameters.
|
|
speed = 115200
|
|
databits = 8
|
|
parity = none
|
|
stopbits = 1
|
|
|
|
# Set the modem preamble. A 150ms
|
|
# preamble should be a reasonable
|
|
# default, but may need to be
|
|
# increased for radios with slow-
|
|
# opening squelch and long TX/RX
|
|
# turnaround
|
|
preamble = 150
|
|
|
|
# Set the modem TX tail. In most
|
|
# cases this should be kept as low
|
|
# as possible to not waste airtime.
|
|
txtail = 10
|
|
|
|
# Configure CDMA parameters. These
|
|
# settings are reasonable defaults.
|
|
persistence = 200
|
|
slottime = 20
|
|
|
|
# You can configure the interface to send
|
|
# out identification on the channel with
|
|
# a set interval by configuring the
|
|
# following two parameters. The KISS
|
|
# interface will only ID if the set
|
|
# interval has elapsed since it's last
|
|
# actual transmission. The interval is
|
|
# configured in seconds.
|
|
# This option is commented out and not
|
|
# used by default.
|
|
# id_callsign = MYCALL-0
|
|
# id_interval = 600
|
|
|
|
# Whether to use KISS flow-control.
|
|
# This is useful for modems that have
|
|
# a small internal packet buffer, but
|
|
# support packet flow control instead.
|
|
flow_control = false
|
|
|
|
|
|
# If you're using Reticulum on amateur radio spectrum,
|
|
# you might want to use the AX.25 KISS interface. This
|
|
# way, Reticulum will automatically encapsulate it's
|
|
# traffic in AX.25 and also identify your stations
|
|
# transmissions with your callsign and SSID.
|
|
#
|
|
# Only do this if you really need to! Reticulum doesn't
|
|
# need the AX.25 layer for anything, and it incurs extra
|
|
# overhead on every packet to encapsulate in AX.25.
|
|
#
|
|
# A more efficient way is to use the plain KISS interface
|
|
# with the beaconing functionality described above.
|
|
|
|
[[Packet Radio AX.25 KISS Interface]]
|
|
type = AX25KISSInterface
|
|
|
|
# Set the station callsign and SSID
|
|
callsign = NO1CLL
|
|
ssid = 0
|
|
|
|
# Enable interface if you want use it!
|
|
interface_enabled = False
|
|
|
|
# Allow transmit on interface.
|
|
outgoing = true
|
|
|
|
# Serial port for the device
|
|
port = /dev/ttyUSB2
|
|
|
|
# Set the serial baud-rate and other
|
|
# configuration parameters.
|
|
speed = 115200
|
|
databits = 8
|
|
parity = none
|
|
stopbits = 1
|
|
|
|
# Whether to use KISS flow-control.
|
|
# This is useful for modems with a
|
|
# small internal packet buffer.
|
|
flow_control = false
|
|
|
|
# Set the modem preamble. A 150ms
|
|
# preamble should be a reasonable
|
|
# default, but may need to be
|
|
# increased for radios with slow-
|
|
# opening squelch and long TX/RX
|
|
# turnaround
|
|
preamble = 150
|
|
|
|
# Set the modem TX tail. In most
|
|
# cases this should be kept as low
|
|
# as possible to not waste airtime.
|
|
txtail = 10
|
|
|
|
# Configure CDMA parameters. These
|
|
# settings are reasonable defaults.
|
|
persistence = 200
|
|
slottime = 20
|
|
|
|
'''.splitlines() |