Lower logging level for connection error messages in I2PDialer

raise max-args to 8, add max-attributes with the same value.

.buildbot/ubuntu/Dockerfile

@@ -2,8 +2,15 @@ FROM ubuntu:focal
 
 RUN apt-get update
 
+RUN apt-get install -yq software-properties-common
+
+RUN apt-add-repository ppa:purplei2p/i2pd
+RUN apt-get update
+
 RUN apt-get install -yq --no-install-suggests --no-install-recommends \
-    python3-dev python3-pip python3.9 python3.9-dev python3.9-venv
+    python3-dev python3-pip python3.9 python3.9-dev python3.9-venv sudo i2pd
+
+RUN echo 'builder ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
 
 RUN python3.9 -m pip install setuptools wheel
 RUN python3.9 -m pip install --upgrade pip tox virtualenv

.buildbot/ubuntu/build.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+sudo service i2pd start

LICENSE

@@ -1,6 +1,7 @@
 The MIT License (MIT)
 
 Copyright (c) 2016-2017 Krzysztof Oziomek
+Copyright (c) 2020-2023 The Bitmessage Developers
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -86,4 +86,4 @@ will allow you to use it anonymously over I2P with MiNode acting as a bridge.
 
 ## Links
 - [Bitmessage project website](https://bitmessage.org)
-- [Protocol specification](https://bitmessage.org/wiki/Protocol_specification)
+- [Protocol specification](https://pybitmessage.rtfd.io/en/v0.6/protocol.html)

minode/connection.py

@@ -3,6 +3,7 @@
 import base64
 import errno
 import logging
+import math
 import random
 import select
 import socket
@@ -37,7 +38,7 @@ class Connection(threading.Thread):
         self.vectors_to_get = set()
         self.vectors_to_send = set()
 
-        self.vectors_requested = dict()
+        self.vectors_requested = {}
 
         self.status = 'ready'
 
@@ -64,6 +65,7 @@ class Connection(threading.Thread):
 
         self.last_message_received = time.time()
         self.last_message_sent = time.time()
+        self.wait_until = 0
 
     def run(self):
         if self.s is None:
@@ -108,11 +110,7 @@ class Connection(threading.Thread):
                         'Disconnecting from %s:%s. Reason: %s',
                         self.host_print, self.port, e)
                     data = None
-            except ConnectionResetError:
-                logging.debug(
-                    'Disconnecting from %s:%s. Reason: ConnectionResetError',
-                    self.host_print, self.port)
-                self.status = 'disconnecting'
+
             self._process_buffer_receive()
             self._process_queue()
             self._send_data()
@@ -137,13 +135,13 @@ class Connection(threading.Thread):
                 time.time() - self.last_message_sent > 300
                 and self.status == 'fully_established'
             ):
-                self.send_queue.put(message.Message(b'pong', b''))
+                self.send_queue.put(message.Message(b'ping', b''))
             if self.status == 'disconnecting' or shared.shutting_down:
                 data = None
             if not data:
                 self.status = 'disconnected'
                 self.s.close()
-                logging.debug(
+                logging.info(
                     'Disconnected from %s:%s', self.host_print, self.port)
                 break
             time.sleep(0.2)
@@ -190,7 +188,10 @@ class Connection(threading.Thread):
             'Initializing TLS connection with %s:%s',
             self.host_print, self.port)
 
-        context = ssl.create_default_context()
+        context = ssl.create_default_context(
+            purpose=ssl.Purpose.CLIENT_AUTH if self.server
+            else ssl.Purpose.SERVER_AUTH
+        )
         context.check_hostname = False
         context.verify_mode = ssl.CERT_NONE
 
@@ -250,6 +251,8 @@ class Connection(threading.Thread):
             structure.NetAddr(c.remote_version.services, c.host, c.port)
             for c in shared.connections if c.network != 'i2p'
             and c.server is False and c.status == 'fully_established'}
+        # pylint: disable=unsubscriptable-object
+        # https://github.com/pylint-dev/pylint/issues/3637
         if len(shared.node_pool) > 10:
             addr.update({
                 structure.NetAddr(1, a[0], a[1])
@@ -332,7 +335,9 @@ class Connection(threading.Thread):
 
     def _process_message(self, m):
         if m.command == b'version':
-            version = message.Version.from_bytes(m.to_bytes())
+            version = message.Version.from_message(m)
+            if shared.stream not in version.streams:
+                raise ValueError('message not for stream %i' % shared.stream)
             logging.debug('%s:%s -> %s', self.host_print, self.port, version)
             if (
                 version.protocol_version != shared.protocol_version
@@ -417,8 +422,12 @@ class Connection(threading.Thread):
             self.send_queue.put(message.Message(b'pong', b''))
 
         elif m.command == b'error':
+            error = message.Error.from_message(m)
             logging.warning(
-                '%s:%s -> error: %s', self.host_print, self.port, m.payload)
+                '%s:%s -> %s', self.host_print, self.port, error)
+            if error.fatal == 2:
+                # reduce probability to connect soon
+                shared.unchecked_node_pool.discard((self.host, self.port))
 
         else:
             logging.debug('%s:%s -> %s', self.host_print, self.port, m)
@@ -426,7 +435,14 @@ class Connection(threading.Thread):
     def _request_objects(self):
         if self.vectors_to_get and len(self.vectors_requested) < 100:
             self.vectors_to_get.difference_update(shared.objects.keys())
-            if self.vectors_to_get:
+            if not self.wait_until:
+                nodes_count = (
+                    len(shared.node_pool) + len(shared.unchecked_node_pool))
+                logging.debug('Nodes count is %i', nodes_count)
+                delay = math.ceil(math.log(nodes_count + 2, 20)) * 5.2
+                self.wait_until = time.time() + delay
+                logging.debug('Skip sending getdata for %.2fs', delay)
+            if self.vectors_to_get and self.wait_until < time.time():
                 logging.info(
                     'Queued %s vectors to get', len(self.vectors_to_get))
                 if len(self.vectors_to_get) > 64:

minode/i2p/controller.py

@@ -3,22 +3,22 @@ import base64
 import logging
 import os
 import socket
-import threading
 import time
 
-from .util import receive_line, pub_from_priv
+from .util import I2PThread, pub_from_priv
 
 
-class I2PController(threading.Thread):
+class I2PController(I2PThread):
     def __init__(self, state, host='127.0.0.1', port=7656, dest_priv=b''):
-        super().__init__(name='I2P Controller')
+        super().__init__(state, name='I2P Controller')
 
-        self.state = state
         self.host = host
         self.port = port
         self.nick = b'MiNode_' + base64.b16encode(os.urandom(4)).lower()
 
         while True:
+            if state.shutting_down:
+                return
             try:
                 self.s = socket.create_connection((self.host, self.port))
                 break
@@ -41,15 +41,6 @@ class I2PController(threading.Thread):
 
         self.create_session()
 
-    def _receive_line(self):
-        line = receive_line(self.s)
-        # logging.debug('I2PController <- %s', line)
-        return line
-
-    def _send(self, command):
-        # logging.debug('I2PController -> %s', command)
-        self.s.sendall(command)
-
     def init_connection(self):
         self._send(b'HELLO VERSION MIN=3.0 MAX=3.3\n')
         self.version_reply = self._receive_line().split()

minode/i2p/dialer.py

@@ -1,23 +1,22 @@
 # -*- coding: utf-8 -*-
 import logging
 import socket
-import threading
 
-from .util import receive_line
+from .util import I2PThread
 
 
-class I2PDialer(threading.Thread):
+class I2PDialer(I2PThread):
     def __init__(
         self, state, destination, nick, sam_host='127.0.0.1', sam_port=7656
     ):
-        self.state = state
+
         self.sam_host = sam_host
         self.sam_port = sam_port
 
         self.nick = nick
         self.destination = destination
 
-        super().__init__(name='I2P Dial to {}'.format(self.destination))
+        super().__init__(state, name='I2P Dial to {}'.format(self.destination))
 
         self.s = socket.create_connection((self.sam_host, self.sam_port))
 
@@ -34,20 +33,11 @@ class I2PDialer(threading.Thread):
             c.start()
             self.state.connections.add(c)
 
-    def _receive_line(self):
-        line = receive_line(self.s)
-        # logging.debug('I2PDialer <- %s', line)
-        return line
-
-    def _send(self, command):
-        # logging.debug('I2PDialer -> %s', command)
-        self.s.sendall(command)
-
     def _connect(self):
         self._send(b'HELLO VERSION MIN=3.0 MAX=3.3\n')
         self.version_reply = self._receive_line().split()
         if b'RESULT=OK' not in self.version_reply:
-            logging.warning('Error while connecting to %s', self.destination)
+            logging.debug('Error while connecting to %s', self.destination)
             self.success = False
 
         self._send(
@@ -55,6 +45,5 @@ class I2PDialer(threading.Thread):
             + self.destination + b'\n')
         reply = self._receive_line().split(b' ')
         if b'RESULT=OK' not in reply:
-            logging.warning(
-                'Error while connecting to %s', self.destination)
+            logging.debug('Error while connecting to %s', self.destination)
             self.success = False

minode/i2p/listener.py

@@ -1,35 +1,22 @@
 # -*- coding: utf-8 -*-
 import logging
 import socket
-import threading
 
-from .util import receive_line
+from .util import I2PThread
 
 
-class I2PListener(threading.Thread):
+class I2PListener(I2PThread):
     def __init__(self, state, nick, host='127.0.0.1', port=7656):
-        super().__init__(name='I2P Listener')
+        super().__init__(state, name='I2P Listener')
 
-        self.state = state
         self.host = host
         self.port = port
         self.nick = nick
 
-        self.s = None
-
         self.version_reply = []
 
         self.new_socket()
 
-    def _receive_line(self):
-        line = receive_line(self.s)
-        # logging.debug('I2PListener <- %s', line)
-        return line
-
-    def _send(self, command):
-        # logging.debug('I2PListener -> %s', command)
-        self.s.sendall(command)
-
     def new_socket(self):
         self.s = socket.create_connection((self.host, self.port))
         self._send(b'HELLO VERSION MIN=3.0 MAX=3.3\n')

minode/i2p/util.py

@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 import base64
 import hashlib
+import threading
 
 
 def receive_line(s):
@@ -14,16 +15,35 @@ def receive_line(s):
     return data[0]
 
 
+class I2PThread(threading.Thread):
+    """
+    Abstract I2P thread with _receive_line() and _send() methods,
+    reused in I2PDialer, I2PListener and I2PController
+    """
+    def __init__(self, state, name=''):
+        super().__init__(name=name)
+        self.state = state
+        self.s = None
+
+    def _receive_line(self):
+        line = receive_line(self.s)
+        # logging.debug('I2PListener <- %s', line)
+        return line
+
+    def _send(self, command):
+        # logging.debug('I2PListener -> %s', command)
+        self.s.sendall(command)
+
+
 def pub_from_priv(priv):
     priv = base64.b64decode(priv, altchars=b'-~')
     # 256 for public key + 128 for signing key + 3 for certificate header
     # + value of bytes priv[385:387]
     pub = priv[:387 + int.from_bytes(priv[385:387], byteorder='big')]
-    pub = base64.b64encode(pub, altchars=b'-~')
-    return pub
+    return base64.b64encode(pub, altchars=b'-~')
 
 
 def b32_from_pub(pub):
     return base64.b32encode(
         hashlib.sha256(base64.b64decode(pub, b'-~')).digest()
-    ).replace(b"=", b"").lower() + b'.b32.i2p'
+    ).replace(b'=', b'').lower() + b'.b32.i2p'

minode/main.py

@@ -2,11 +2,9 @@
 """Functions for starting the program"""
 import argparse
 import base64
-import csv
 import logging
 import multiprocessing
 import os
-import pickle
 import signal
 import socket
 
@@ -22,7 +20,7 @@ def handler(s, f):  # pylint: disable=unused-argument
     shared.shutting_down = True
 
 
-def parse_arguments():
+def parse_arguments():  # pylint: disable=too-many-branches,too-many-statements
     """Parsing arguments"""
     parser = argparse.ArgumentParser()
     parser.add_argument('-p', '--port', help='Port to listen on', type=int)
@@ -102,56 +100,6 @@ def parse_arguments():
         shared.i2p_transient = True
 
 
-def load_data():
-    """Loads initial nodes and data, stored in files between sessions"""
-    try:
-        with open(
-            os.path.join(shared.data_directory, 'objects.pickle'), 'br'
-        ) as src:
-            shared.objects = pickle.load(src)
-    except FileNotFoundError:
-        pass  # first start
-    except Exception:
-        logging.warning(
-            'Error while loading objects from disk.', exc_info=True)
-
-    try:
-        with open(
-            os.path.join(shared.data_directory, 'nodes.pickle'), 'br'
-        ) as src:
-            shared.node_pool = pickle.load(src)
-    except FileNotFoundError:
-        pass
-    except Exception:
-        logging.warning('Error while loading nodes from disk.', exc_info=True)
-
-    try:
-        with open(
-            os.path.join(shared.data_directory, 'i2p_nodes.pickle'), 'br'
-        ) as src:
-            shared.i2p_node_pool = pickle.load(src)
-    except FileNotFoundError:
-        pass
-    except Exception:
-        logging.warning('Error while loading nodes from disk.', exc_info=True)
-
-    with open(
-        os.path.join(shared.source_directory, 'core_nodes.csv'),
-        'r', newline=''
-    ) as src:
-        reader = csv.reader(src)
-        shared.core_nodes = {tuple(row) for row in reader}
-        shared.node_pool.update(shared.core_nodes)
-
-    with open(
-        os.path.join(shared.source_directory, 'i2p_core_nodes.csv'),
-        'r', newline=''
-    ) as f:
-        reader = csv.reader(f)
-        shared.i2p_core_nodes = {(row[0].encode(), 'i2p') for row in reader}
-        shared.i2p_node_pool.update(shared.i2p_core_nodes)
-
-
 def bootstrap_from_dns():
     """Addes addresses of bootstrap servers to known nodes"""
     try:
@@ -197,7 +145,7 @@ def start_ip_listener():
                 'Error while starting IPv4 listener on port %s.'
                 ' However the IPv6 one seems to be working'
                 ' and will probably accept IPv4 connections.',  # 48 on macos
-                shared.listening_port, exc_info=(e.errno not in (48, 98)))
+                shared.listening_port, exc_info=e.errno not in (48, 98))
         else:
             logging.warning(
                 'Error while starting IPv4 listener on port %s.'
@@ -290,8 +238,6 @@ def main():
                 'Error while creating data directory in: %s',
                 shared.data_directory, exc_info=True)
 
-    load_data()
-
     if shared.ip_enabled and not shared.trusted_peer:
         bootstrap_from_dns()
 
@@ -300,18 +246,6 @@ def main():
         # so we can collect I2P destination objects
         start_i2p_listener()
 
-    for vector in set(shared.objects):
-        if not shared.objects[vector].is_valid():
-            if shared.objects[vector].is_expired():
-                logging.debug(
-                    'Deleted expired object: %s',
-                    base64.b16encode(vector).decode())
-            else:
-                logging.warning(
-                    'Deleted invalid object: %s',
-                    base64.b16encode(vector).decode())
-            del shared.objects[vector]
-
     manager = Manager()
     manager.start()
 

minode/manager.py

@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 """The main thread, managing connections, nodes and objects"""
 import base64
+import csv
 import logging
 import os
 import pickle
@@ -25,9 +26,11 @@ class Manager(threading.Thread):
         self.last_pickled_nodes = time.time()
         # Publish destination 5-15 minutes after start
         self.last_published_i2p_destination = \
-            time.time() - 50 * 60 + random.uniform(-1, 1) * 300  # nosec
+            time.time() - 50 * 60 + random.uniform(-1, 1) * 300  # nosec B311
 
     def run(self):
+        self.load_data()
+        self.clean_objects()
         while True:
             time.sleep(0.8)
             now = time.time()
@@ -53,12 +56,17 @@ class Manager(threading.Thread):
     @staticmethod
     def clean_objects():
         for vector in set(shared.objects):
-            if shared.objects[vector].is_expired():
+            if not shared.objects[vector].is_valid():
+                if shared.objects[vector].is_expired():
+                    logging.debug(
+                        'Deleted expired object: %s',
+                        base64.b16encode(vector).decode())
+                else:
+                    logging.warning(
+                        'Deleted invalid object: %s',
+                        base64.b16encode(vector).decode())
                 with shared.objects_lock:
                     del shared.objects[vector]
-                logging.debug(
-                    'Deleted expired object: %s',
-                    base64.b16encode(vector).decode())
 
     @staticmethod
     def manage_connections():
@@ -138,6 +146,59 @@ class Manager(threading.Thread):
                     shared.connections.add(c)
         shared.hosts = hosts
 
+    @staticmethod
+    def load_data():
+        """Loads initial nodes and data, stored in files between sessions"""
+        try:
+            with open(
+                os.path.join(shared.data_directory, 'objects.pickle'), 'br'
+            ) as src:
+                shared.objects = pickle.load(src)
+        except FileNotFoundError:
+            pass  # first start
+        except Exception:
+            logging.warning(
+                'Error while loading objects from disk.', exc_info=True)
+
+        try:
+            with open(
+                os.path.join(shared.data_directory, 'nodes.pickle'), 'br'
+            ) as src:
+                shared.node_pool = pickle.load(src)
+        except FileNotFoundError:
+            pass
+        except Exception:
+            logging.warning(
+                'Error while loading nodes from disk.', exc_info=True)
+
+        try:
+            with open(
+                os.path.join(shared.data_directory, 'i2p_nodes.pickle'), 'br'
+            ) as src:
+                shared.i2p_node_pool = pickle.load(src)
+        except FileNotFoundError:
+            pass
+        except Exception:
+            logging.warning(
+                'Error while loading nodes from disk.', exc_info=True)
+
+        with open(
+            os.path.join(shared.source_directory, 'core_nodes.csv'),
+            'r', newline='', encoding='ascii'
+        ) as src:
+            reader = csv.reader(src)
+            shared.core_nodes = {tuple(row) for row in reader}
+            shared.node_pool.update(shared.core_nodes)
+
+        with open(
+            os.path.join(shared.source_directory, 'i2p_core_nodes.csv'),
+            'r', newline='', encoding='ascii'
+        ) as f:
+            reader = csv.reader(f)
+            shared.i2p_core_nodes = {
+                (row[0].encode(), 'i2p') for row in reader}
+            shared.i2p_node_pool.update(shared.i2p_core_nodes)
+
     @staticmethod
     def pickle_objects():
         try:
@@ -187,5 +248,5 @@ class Manager(threading.Thread):
             obj = structure.Object(
                 b'\x00' * 8, int(time.time() + 2 * 3600),
                 shared.i2p_dest_obj_type, shared.i2p_dest_obj_version,
-                1, dest_pub_raw)
+                shared.stream, dest_pub_raw)
             proofofwork.do_pow_and_publish(obj)

minode/message.py

@@ -9,7 +9,7 @@ from . import shared, structure
 
 
 class Header():
-    """Common message header"""
+    """Message header structure"""
     def __init__(self, command, payload_length, payload_checksum):
         self.command = command
         self.payload_length = payload_length
@@ -24,6 +24,7 @@ class Header():
             base64.b16encode(self.payload_checksum).decode())
 
     def to_bytes(self):
+        """Serialize to bytes"""
         b = b''
         b += shared.magic_bytes
         b += self.command.ljust(12, b'\x00')
@@ -33,6 +34,7 @@ class Header():
 
     @classmethod
     def from_bytes(cls, b):
+        """Parse from bytes"""
         magic_bytes, command, payload_length, payload_checksum = struct.unpack(
             '>4s12sL4s', b)
 
@@ -59,6 +61,7 @@ class Message():
             base64.b16encode(self.payload_checksum).decode())
 
     def to_bytes(self):
+        """Serialize to bytes"""
         b = Header(
             self.command, self.payload_length, self.payload_checksum
         ).to_bytes()
@@ -67,6 +70,7 @@ class Message():
 
     @classmethod
     def from_bytes(cls, b):
+        """Parse from bytes"""
         h = Header.from_bytes(b[:24])
 
         payload = b[24:]
@@ -87,12 +91,19 @@ class Message():
         return cls(h.command, payload)
 
 
+def _payload_read_int(data):
+    varint_length = structure.VarInt.length(data[0])
+    return (
+        structure.VarInt.from_bytes(data[:varint_length]).n,
+        data[varint_length:])
+
+
 class Version():
-    """The version message"""
+    """The version message payload"""
     def __init__(
         self, host, port, protocol_version=shared.protocol_version,
         services=shared.services, nonce=shared.nonce,
-        user_agent=shared.user_agent
+        user_agent=shared.user_agent, streams=None
     ):
         self.host = host
         self.port = port
@@ -101,6 +112,9 @@ class Version():
         self.services = services
         self.nonce = nonce
         self.user_agent = user_agent
+        self.streams = streams or [shared.stream]
+        if len(self.streams) > 160000:
+            self.streams = self.streams[:160000]
 
     def __repr__(self):
         return (
@@ -115,20 +129,20 @@ class Version():
         payload += struct.pack('>Q', self.services)
         payload += struct.pack('>Q', int(time.time()))
         payload += structure.NetAddrNoPrefix(
-            shared.services, self.host, self.port).to_bytes()
+            1, self.host, self.port).to_bytes()
         payload += structure.NetAddrNoPrefix(
-            shared.services, '127.0.0.1', 8444).to_bytes()
+            self.services, '127.0.0.1', 8444).to_bytes()
         payload += self.nonce
-        payload += structure.VarInt(len(shared.user_agent)).to_bytes()
-        payload += shared.user_agent
-        payload += 2 * structure.VarInt(1).to_bytes()
+        payload += structure.VarInt(len(self.user_agent)).to_bytes()
+        payload += self.user_agent
+        payload += structure.VarInt(len(self.streams)).to_bytes()
+        for stream in self.streams:
+            payload += structure.VarInt(stream).to_bytes()
 
         return Message(b'version', payload).to_bytes()
 
     @classmethod
-    def from_bytes(cls, b):
-        m = Message.from_bytes(b)
-
+    def from_message(cls, m):
         payload = m.payload
 
         (  # unused: timestamp, net_addr_local
@@ -142,24 +156,28 @@ class Version():
 
         payload = payload[80:]
 
-        user_agent_varint_length = structure.VarInt.length(payload[0])
-        user_agent_length = structure.VarInt.from_bytes(
-            payload[:user_agent_varint_length]).n
-
-        payload = payload[user_agent_varint_length:]
-
+        user_agent_length, payload = _payload_read_int(payload)
         user_agent = payload[:user_agent_length]
-
         payload = payload[user_agent_length:]
 
-        if payload != b'\x01\x01':
-            raise ValueError('message not for stream 1')
+        streams_count, payload = _payload_read_int(payload)
+        if streams_count > 160000:
+            raise ValueError('malformed Version message, to many streams')
+        streams = []
 
-        return cls(host, port, protocol_version, services, nonce, user_agent)
+        while payload:
+            stream, payload = _payload_read_int(payload)
+            streams.append(stream)
+
+        if streams_count != len(streams):
+            raise ValueError('malformed Version message, wrong streams_count')
+
+        return cls(
+            host, port, protocol_version, services, nonce, user_agent, streams)
 
 
 class Inv():
-    """The inv message"""
+    """The inv message payload"""
     def __init__(self, vectors):
         self.vectors = set(vectors)
 
@@ -176,11 +194,7 @@ class Inv():
     def from_message(cls, m):
         payload = m.payload
 
-        vector_count_varint_length = structure.VarInt.length(payload[0])
-        vector_count = structure.VarInt.from_bytes(
-            payload[:vector_count_varint_length]).n
-
-        payload = payload[vector_count_varint_length:]
+        vector_count, payload = _payload_read_int(payload)
 
         vectors = set()
 
@@ -195,7 +209,7 @@ class Inv():
 
 
 class GetData():
-    """The getdata message"""
+    """The getdata message payload"""
     def __init__(self, vectors):
         self.vectors = set(vectors)
 
@@ -212,11 +226,7 @@ class GetData():
     def from_message(cls, m):
         payload = m.payload
 
-        vector_count_varint_length = structure.VarInt.length(payload[0])
-        vector_count = structure.VarInt.from_bytes(
-            payload[:vector_count_varint_length]).n
-
-        payload = payload[vector_count_varint_length:]
+        vector_count, payload = _payload_read_int(payload)
 
         vectors = set()
 
@@ -231,7 +241,7 @@ class GetData():
 
 
 class Addr():
-    """The addr message"""
+    """The addr message payload"""
     def __init__(self, addresses):
         self.addresses = addresses
 
@@ -248,11 +258,8 @@ class Addr():
     def from_message(cls, m):
         payload = m.payload
 
-        addr_count_varint_length = structure.VarInt.length(payload[0])
-        # addr_count = structure.VarInt.from_bytes(
-        #     payload[:addr_count_varint_length]).n
-
-        payload = payload[addr_count_varint_length:]
+        # not validating addr_count
+        _, payload = _payload_read_int(payload)
 
         addresses = set()
 
@@ -261,3 +268,37 @@ class Addr():
             payload = payload[38:]
 
         return cls(addresses)
+
+
+class Error():
+    """The error message payload"""
+    def __init__(self, error_text=b'', fatal=0, ban_time=0, vector=b''):
+        self.error_text = error_text
+        self.fatal = fatal
+        self.ban_time = ban_time
+        self.vector = vector
+
+    def __repr__(self):
+        return 'error, text: {}'.format(self.error_text)
+
+    def to_bytes(self):
+        return Message(
+            b'error', structure.VarInt(self.fatal).to_bytes()
+            + structure.VarInt(self.ban_time).to_bytes()
+            + structure.VarInt(len(self.vector)).to_bytes() + self.vector
+            + structure.VarInt(len(self.error_text)).to_bytes()
+            + self.error_text
+        ).to_bytes()
+
+    @classmethod
+    def from_message(cls, m):
+        payload = m.payload
+        fatal, payload = _payload_read_int(payload)
+        ban_time, payload = _payload_read_int(payload)
+        vector_length, payload = _payload_read_int(payload)
+        vector = payload[:vector_length]
+        payload = payload[vector_length:]
+        error_text_length, payload = _payload_read_int(payload)
+        error_text = payload[:error_text_length]
+
+        return cls(error_text, fatal, ban_time, vector)

minode/shared.py

@@ -21,7 +21,7 @@ protocol_version = 3
 services = 3  # NODE_NETWORK, NODE_SSL
 stream = 1
 nonce = os.urandom(8)
-user_agent = b'/MiNode:0.3.1/'
+user_agent = b'/MiNode:0.3.2/'
 timeout = 600
 header_length = 24
 i2p_dest_obj_type = 0x493250

minode/structure.py

@@ -46,7 +46,7 @@ class VarInt():
 
 
 class Object():
-    """object message"""
+    """The 'object' message payload"""
     def __init__(
         self, nonce, expires_time, object_type, version,
         stream_number, object_payload
@@ -60,12 +60,19 @@ class Object():
         self.vector = hashlib.sha512(hashlib.sha512(
             self.to_bytes()).digest()).digest()[:32]
 
+        self.tag = (
+            # broadcast from version 5 and pubkey/getpukey from version 4
+            self.object_payload[:32] if object_type == 3 and version == 5
+            or (object_type in (0, 1) and version == 4)
+            else None)
+
     def __repr__(self):
         return 'object, vector: {}'.format(
             base64.b16encode(self.vector).decode())
 
     @classmethod
     def from_message(cls, m):
+        """Decode message payload"""
         payload = m.payload
         nonce, expires_time, object_type = struct.unpack('>8sQL', payload[:20])
         payload = payload[20:]
@@ -80,6 +87,7 @@ class Object():
             nonce, expires_time, object_type, version, stream_number, payload)
 
     def to_bytes(self):
+        """Serialize to bytes"""
         payload = b''
         payload += self.nonce
         payload += struct.pack('>QL', self.expires_time, self.object_type)
@@ -90,9 +98,11 @@ class Object():
         return payload
 
     def is_expired(self):
+        """Check if object's TTL is expired"""
         return self.expires_time + 3 * 3600 < time.time()
 
     def is_valid(self):
+        """Checks the object validity"""
         if self.is_expired():
             logging.debug(
                 'Invalid object %s, reason: expired',
@@ -108,18 +118,16 @@ class Object():
                 'Invalid object %s, reason: payload is too long',
                 base64.b16encode(self.vector).decode())
             return False
-        if self.stream_number != 1:
+        if self.stream_number != shared.stream:
             logging.warning(
-                'Invalid object %s, reason: not in stream 1',
-                base64.b16encode(self.vector).decode())
+                'Invalid object %s, reason: not in stream %i',
+                base64.b16encode(self.vector).decode(), shared.stream)
             return False
-        data = self.to_bytes()[8:]
-        # length = len(data) + 8 + shared.payload_length_extra_bytes
-        # dt = max(self.expires_time - time.time(), 0)
-        h = hashlib.sha512(data).digest()
+
         pow_value = int.from_bytes(
             hashlib.sha512(hashlib.sha512(
-                self.nonce + h).digest()).digest()[:8], 'big')
+                self.nonce + self.pow_initial_hash()
+            ).digest()).digest()[:8], 'big')
         target = self.pow_target()
         if target < pow_value:
             logging.warning(
@@ -129,6 +137,7 @@ class Object():
         return True
 
     def pow_target(self):
+        """Compute PoW target"""
         data = self.to_bytes()[8:]
         length = len(data) + 8 + shared.payload_length_extra_bytes
         dt = max(self.expires_time - time.time(), 0)
@@ -138,6 +147,7 @@ class Object():
                     length + (dt * length) / (2 ** 16))))
 
     def pow_initial_hash(self):
+        """Compute the initial hash for PoW"""
         return hashlib.sha512(self.to_bytes()[8:]).digest()
 
 

minode/tests/test_message.py

@@ -3,10 +3,9 @@ import unittest
 from binascii import unhexlify
 
 from minode import message
+from minode.shared import magic_bytes
 
 
-MAGIC = 0xE9BEB4D9
-
 # 500 identical peers:
 # import ipaddress
 # from hyperbit import net, packet
@@ -14,26 +13,56 @@ MAGIC = 0xE9BEB4D9
 #     1626611891, 1, 1, net.ipv6(ipaddress.ip_address('127.0.0.1')).packed,
 #     8444
 # ) for _ in range(1000)]
-sample_data = unhexlify(
+sample_addr_data = unhexlify(
     'fd01f4' + (
         '0000000060f420b30000000'
         '1000000000000000100000000000000000000ffff7f00000120fc'
         ) * 500
 )
 
+# protocol.CreatePacket(b'ping', b'test')
+sample_ping_msg = unhexlify(
+    'e9beb4d970696e67000000000000000000000004ee26b0dd74657374')
+
+# from pybitmessage import pathmagic
+# pathmagic.setup()
+# import protocol
+# msg = protocol.assembleVersionMessage('127.0.0.1', 8444, [1, 2, 3])
+sample_version_msg = unhexlify(
+    'e9beb4d976657273696f6e00000000000000006b1b06b182000000030000000000000003'
+    '0000000064fdd3e1000000000000000100000000000000000000ffff7f00000120fc0000'
+    '00000000000300000000000000000000ffff7f00000120fc00c0b6c3eefb2adf162f5079'
+    '4269746d6573736167653a302e362e332e322f03010203'
+)
+
+#
+sample_error_data = \
+    b'\x02\x00\x006Too many connections from your IP. Closing connection.'
+
 
 class TestMessage(unittest.TestCase):
     """Test assembling and disassembling of network mesages"""
 
     def test_packet(self):
-        """Check the packet created by message.Message()"""
-        head = unhexlify(b'%x' % MAGIC)
-        self.assertEqual(
-            message.Message(b'ping', b'').to_bytes()[:len(head)], head)
+        """Check packet creation and parsing by message.Message"""
+        msg = message.Message(b'ping', b'test').to_bytes()
+        self.assertEqual(msg[:len(magic_bytes)], magic_bytes)
+        with self.assertRaises(ValueError):
+            # wrong magic
+            message.Message.from_bytes(msg[1:])
+        with self.assertRaises(ValueError):
+            # wrong length
+            message.Message.from_bytes(msg[:-1])
+        with self.assertRaises(ValueError):
+            # wrong checksum
+            message.Message.from_bytes(msg[:-1] + b'\x00')
+        msg = message.Message.from_bytes(sample_ping_msg)
+        self.assertEqual(msg.command, b'ping')
+        self.assertEqual(msg.payload, b'test')
 
     def test_addr(self):
         """Test addr messages"""
-        msg = message.Message(b'addr', sample_data)
+        msg = message.Message(b'addr', sample_addr_data)
         addr_packet = message.Addr.from_message(msg)
         self.assertEqual(len(addr_packet.addresses), 500)
         address = addr_packet.addresses.pop()
@@ -41,3 +70,32 @@ class TestMessage(unittest.TestCase):
         self.assertEqual(address.services, 1)
         self.assertEqual(address.port, 8444)
         self.assertEqual(address.host, '127.0.0.1')
+
+    def test_version(self):
+        """Test version message"""
+        msg = message.Message.from_bytes(sample_version_msg)
+        self.assertEqual(msg.command, b'version')
+        version_packet = message.Version.from_message(msg)
+        self.assertEqual(version_packet.host, '127.0.0.1')
+        self.assertEqual(version_packet.port, 8444)
+        self.assertEqual(version_packet.protocol_version, 3)
+        self.assertEqual(version_packet.services, 3)
+        self.assertEqual(version_packet.user_agent, b'/PyBitmessage:0.6.3.2/')
+        self.assertEqual(version_packet.streams, [1, 2, 3])
+
+        msg = version_packet.to_bytes()
+        # omit header and timestamp
+        self.assertEqual(msg[24:36], sample_version_msg[24:36])
+        self.assertEqual(msg[44:], sample_version_msg[44:])
+
+    def test_error(self):
+        """Test error message"""
+        msg = message.Error.from_message(
+            message.Message(b'error', sample_error_data))
+        self.assertEqual(msg.fatal, 2)
+        self.assertEqual(msg.ban_time, 0)
+        self.assertEqual(msg.vector, b'')
+
+        msg = message.Error(
+            b'Too many connections from your IP. Closing connection.', 2)
+        self.assertEqual(msg.to_bytes()[24:], sample_error_data)

minode/tests/test_process.py

@@ -1,6 +1,7 @@
 """Blind tests, starting the minode process"""
 import unittest
 import signal
+import socket
 import subprocess
 import sys
 import tempfile
@@ -8,6 +9,12 @@ import time
 
 import psutil
 
+try:
+    socket.socket().bind(('127.0.0.1', 7656))
+    i2p_port_free = True
+except (OSError, socket.error):
+    i2p_port_free = False
+
 
 class TestProcessProto(unittest.TestCase):
     """Test process attributes, common flow"""
@@ -53,6 +60,12 @@ class TestProcessProto(unittest.TestCase):
         except psutil.NoSuchProcess:
             pass
 
+    def connections(self):
+        """All process' established connections"""
+        return [
+            c for c in self.process.connections()
+            if c.status == 'ESTABLISHED']
+
 
 class TestProcessShutdown(TestProcessProto):
     """Separate test case for SIGTERM"""
@@ -73,15 +86,10 @@ class TestProcess(TestProcessProto):
         """Check minode process connections"""
         _started = time.time()
 
-        def connections():
-            return [
-                c for c in self.process.connections()
-                if c.status == 'ESTABLISHED']
-
         def continue_check_limit(extra_time):
-            for t in range(extra_time * 2):
+            for _ in range(extra_time * 2):
                 self.assertLessEqual(
-                    len(connections()),
+                    len(self.connections()),
                     # shared.outgoing_connections, one listening
                     # TODO: find the cause of one extra
                     (min(self._connection_limit, 8) if not self._listen
@@ -90,8 +98,8 @@ class TestProcess(TestProcessProto):
                     ' by --connection-limit')
                 time.sleep(1)
 
-        for t in range(self._wait_time * 2):
-            if len(connections()) > self._connection_limit / 2:
+        for _ in range(self._wait_time * 2):
+            if len(self.connections()) > self._connection_limit / 2:
                 _time_to_connect = round(time.time() - _started)
                 break
             time.sleep(0.5)
@@ -106,10 +114,33 @@ class TestProcess(TestProcessProto):
         for c in self.process.connections():
             if c.status == 'LISTEN':
                 if self._listen is False:
-                    return self.fail(
-                        'Listening while started with --no-incoming')
+                    self.fail('Listening while started with --no-incoming')
+                    return
                 self.assertEqual(c.laddr[1], self._listening_port or 8444)
                 break
         else:
             if self._listen:
                 self.fail('No listening connection found')
+
+
+@unittest.skipIf(i2p_port_free, 'No running i2pd detected')
+class TestProcessI2P(TestProcess):
+    """Test minode process with --i2p and no IP"""
+    _process_cmd = ['minode', '--i2p', '--no-ip']
+    _connection_limit = 4
+    _wait_time = 120
+    _listen = True
+    _listening_port = 8448
+
+    def test_connections(self):
+        """Ensure all connections are I2P"""
+        super().test_connections()
+        for c in self.connections():
+            self.assertEqual(c.raddr[0], '127.0.0.1')
+            self.assertEqual(c.raddr[1], 7656)
+
+
+@unittest.skipUnless(i2p_port_free, 'Detected running i2pd')
+class TestProcessNoI2P(TestProcessShutdown):
+    """Test minode process shutdown with --i2p and no IP"""
+    _process_cmd = ['minode', '--i2p', '--no-ip']

minode/tests/test_structure.py

@@ -1,14 +1,40 @@
 """Tests for structures"""
-import unittest
+import base64
+import logging
+import queue
 import struct
+import time
+import unittest
 from binascii import unhexlify
 
-from minode import structure
+from minode import message, proofofwork, shared, structure
+
+
+# host pregenerated by pybitmessage.protocol.encodeHost()
+# for one of bootstrap servers, port 8080,
+# everything else is like in test_message: 1626611891, 1, 1
+sample_addr_data = unhexlify(
+    '0000000060f420b3000000010000000000000001'
+    '260753000201300000000000000057ae1f90')
+
+# data for an object with expires_time 1697063939
+# structure.Object(
+#     b'\x00' * 8, expires_time, 42, 1, 2, b'HELLO').to_bytes()
+sample_object_data = unhexlify(
+    '000000000000000000000000652724030000002a010248454c4c4f')
+
+logging.basicConfig(
+    level=shared.log_level,
+    format='[%(asctime)s] [%(levelname)s] %(message)s')
 
 
 class TestStructure(unittest.TestCase):
     """Testing structures serializing and deserializing"""
 
+    @classmethod
+    def setUpClass(cls):
+        shared.objects = {}
+
     def test_varint(self):
         """Test varint serializing and deserializing"""
         s = structure.VarInt(0)
@@ -68,3 +94,80 @@ class TestStructure(unittest.TestCase):
         self.assertEqual(
             addr.to_bytes()[8:24],
             unhexlify('0102030405060708090a0b0c0d0e0f10'))
+
+        addr = structure.NetAddr.from_bytes(sample_addr_data)
+        self.assertEqual(addr.host, '2607:5300:201:3000::57ae')
+        self.assertEqual(addr.port, 8080)
+        self.assertEqual(addr.stream, 1)
+        self.assertEqual(addr.services, 1)
+
+        addr = structure.NetAddr(1, '2607:5300:201:3000::57ae', 8080, 1)
+        self.assertEqual(addr.to_bytes()[8:], sample_addr_data[8:])
+
+    def test_object(self):
+        """Create and check objects"""
+        obj = structure.Object.from_message(
+            message.Message(b'object', sample_object_data))
+        self.assertEqual(obj.object_type, 42)
+        self.assertEqual(obj.stream_number, 2)
+        self.assertEqual(obj.expires_time, 1697063939)
+        self.assertEqual(obj.object_payload, b'HELLO')
+
+        obj = structure.Object(
+            b'\x00' * 8, int(time.time() + 3000000), 42, 1, 1, b'HELLO')
+        self.assertFalse(obj.is_valid())
+        obj.expires_time = int(time.time() - 11000)
+        self.assertFalse(obj.is_valid())
+
+        obj = structure.Object(
+            b'\x00' * 8, int(time.time() + 300), 42, 1, 2, b'HELLO')
+        vector = obj.vector
+        proofofwork._worker(obj)  # pylint: disable=protected-access
+        obj = shared.objects.popitem()[1]
+        self.assertNotEqual(obj.vector, vector)
+        self.assertFalse(obj.is_expired())
+        self.assertFalse(obj.is_valid())
+        shared.stream = 2
+        self.assertTrue(obj.is_valid())
+
+        obj.object_payload = \
+            b'TIGER, tiger, burning bright. In the forests of the night'
+        self.assertFalse(obj.is_valid())
+
+    def test_proofofwork(self):
+        """Check the main proofofwork call and worker"""
+        shared.vector_advertise_queue = queue.Queue()
+        obj = structure.Object(
+            b'\x00' * 8, int(time.time() + 300), 42, 1,
+            shared.stream, b'HELLO')
+        start_time = time.time()
+        proofofwork.do_pow_and_publish(obj)
+        try:
+            vector = shared.vector_advertise_queue.get(timeout=300)
+        except queue.Empty:
+            self.fail("Couldn't make work in 300 sec")
+        else:
+            time.sleep(1)
+            try:
+                result = shared.objects[vector]
+            except KeyError:
+                self.fail(
+                    "Couldn't found object with vector %s"
+                    " %s sec after pow start" % (
+                        base64.b16encode(vector), time.time() - start_time))
+            self.assertTrue(result.is_valid())
+            self.assertEqual(result.object_type, 42)
+            self.assertEqual(result.object_payload, b'HELLO')
+
+        q = queue.Queue()
+        # pylint: disable=protected-access
+        proofofwork._pow_worker(obj.pow_target(), obj.pow_initial_hash(), q)
+        try:
+            nonce = q.get(timeout=5)
+        except queue.Empty:
+            self.fail("No nonce found in the queue")
+
+        obj = structure.Object(
+            nonce, obj.expires_time, obj.object_type, obj.version,
+            obj.stream_number, obj.object_payload)
+        self.assertTrue(obj.is_valid())

tox.ini

@@ -39,5 +39,7 @@ omit =
 [coverage:report]
 ignore_errors = true
 
-[MESSAGES CONTROL]
-disable = invalid-name
+[pylint.main]
+disable = invalid-name,consider-using-f-string,fixme
+max-args = 8
+max-attributes = 8