Experimental I2P support

minode/advertiser.py

@@ -33,7 +33,11 @@ class Advertiser(threading.Thread):
     def _advertise_addresses():
         addresses_to_advertise = set()
         while not shared.address_advertise_queue.empty():
-            addresses_to_advertise.add(shared.address_advertise_queue.get())
+            addr = shared.address_advertise_queue.get()
+            if addr.port == 'i2p':
+                # We should not try to construct Addr messages with I2P destinations (yet)
+                continue
+            addresses_to_advertise.add(addr)
         if len(addresses_to_advertise) > 0:
             for c in shared.connections.copy():
                 if c.status == 'fully_established':

minode/connection.py

@@ -16,7 +16,17 @@ import structure
 
 
 class Connection(threading.Thread):
-    def __init__(self, host, port, s=None):
+    def __init__(self, host, port, s=None, network='ip', server=False, i2p_remote_dest=b''):
+        self.host = host
+        self.port = port
+        self.network = network
+        self.i2p_remote_dest = i2p_remote_dest
+
+        if self.network == 'i2p':
+            self.host_print = self.i2p_remote_dest[:8].decode()
+        else:
+            self.host_print = self.host
+
         super().__init__(name='Connection to {}:{}'.format(host, port))
 
         self.send_queue = queue.Queue()
@@ -31,16 +41,13 @@ class Connection(threading.Thread):
         self.verack_received = False
         self.verack_sent = False
 
-        self.host = host
-        self.port = int(port)
-
         self.s = s
 
         self.remote_version = None
 
-        self.server = bool(s)
+        self.server = server
 
-        if self.server:
+        if bool(s):
             self.status = 'connected'
 
         self.buffer_receive = b''
@@ -60,7 +67,10 @@ class Connection(threading.Thread):
             return
         self.s.settimeout(0)
         if not self.server:
-            self.send_queue.put(message.Version(self.host, self.port))
+            if self.network == 'ip':
+                self.send_queue.put(message.Version(self.host, self.port))
+            else:
+                self.send_queue.put(message.Version('127.0.0.1', 7656))
         while True:
             if self.on_connection_fully_established_scheduled and not (self.buffer_send or self.buffer_receive):
                 self._on_connection_fully_established()
@@ -85,10 +95,10 @@ class Connection(threading.Thread):
                         self._request_objects()
                         self._send_objects()
                 else:
-                    logging.debug('Disconnecting from {}:{}. Reason: {}'.format(self.host, self.port, e))
+                    logging.debug('Disconnecting from {}:{}. Reason: {}'.format(self.host_print, self.port, e))
                     data = None
             except ConnectionResetError:
-                logging.debug('Disconnecting from {}:{}. Reason: ConnectionResetError'.format(self.host, self.port))
+                logging.debug('Disconnecting from {}:{}. Reason: ConnectionResetError'.format(self.host_print, self.port))
                 self.status = 'disconnecting'
             self._process_buffer_receive()
             self._process_queue()
@@ -96,12 +106,12 @@ class Connection(threading.Thread):
             if time.time() - self.last_message_received > shared.timeout:
                 logging.debug(
                     'Disconnecting from {}:{}. Reason: time.time() - self.last_message_received > shared.timeout'.format(
-                        self.host, self.port))
+                        self.host_print, self.port))
                 self.status = 'disconnecting'
             if time.time() - self.last_message_received > 30 and self.status != 'fully_established'and self.status != 'disconnecting':
                 logging.debug(
                     'Disconnecting from {}:{}. Reason: time.time() - self.last_message_received > 30 and self.status != \'fully_established\''.format(
-                        self.host, self.port))
+                        self.host_print, self.port))
                 self.status = 'disconnecting'
             if time.time() - self.last_message_sent > 300 and self.status == 'fully_established':
                 self.send_queue.put(message.Message(b'pong', b''))
@@ -110,19 +120,19 @@ class Connection(threading.Thread):
             if not data:
                 self.status = 'disconnected'
                 self.s.close()
-                logging.info('Disconnected from {}:{}'.format(self.host, self.port))
+                logging.info('Disconnected from {}:{}'.format(self.host_print, self.port))
                 break
             time.sleep(0.2)
 
     def _connect(self):
-        logging.debug('Connecting to {}:{}'.format(self.host, self.port))
+        logging.debug('Connecting to {}:{}'.format(self.host_print, self.port))
 
         try:
             self.s = socket.create_connection((self.host, self.port), 10)
             self.status = 'connected'
-            logging.info('Established TCP connection to {}:{}'.format(self.host, self.port))
+            logging.info('Established TCP connection to {}:{}'.format(self.host_print, self.port))
         except Exception as e:
-            logging.warning('Connection to {}:{} failed. Reason: {}'.format(self.host, self.port, e))
+            logging.warning('Connection to {}:{} failed. Reason: {}'.format(self.host_print, self.port, e))
             self.status = 'failed'
 
     def _send_data(self):
@@ -133,11 +143,11 @@ class Connection(threading.Thread):
             except (BlockingIOError, ssl.SSLWantWriteError):
                 pass
             except (BrokenPipeError, ConnectionResetError, ssl.SSLError) as e:
-                logging.debug('Disconnecting from {}:{}. Reason: {}'.format(self.host, self.port, e))
+                logging.debug('Disconnecting from {}:{}. Reason: {}'.format(self.host_print, self.port, e))
                 self.status = 'disconnecting'
 
     def _do_tls_handshake(self):
-        logging.debug('Initializing TLS connection with {}:{}'.format(self.host, self.port))
+        logging.debug('Initializing TLS connection with {}:{}'.format(self.host_print, self.port))
         self.s = ssl.wrap_socket(self.s, keyfile=os.path.join(shared.source_directory, 'tls', 'key.pem'),
                                  certfile=os.path.join(shared.source_directory, 'tls', 'cert.pem'),
                                  server_side=self.server, ssl_version=ssl.PROTOCOL_TLSv1, do_handshake_on_connect=False,
@@ -153,23 +163,23 @@ class Connection(threading.Thread):
             except ssl.SSLWantWriteError:
                 select.select([], [self.s], [])
             except Exception as e:
-                logging.debug('Disconnecting from {}:{}. Reason: {}'.format(self.host, self.port, e))
+                logging.debug('Disconnecting from {}:{}. Reason: {}'.format(self.host_print, self.port, e))
                 self.status = 'disconnecting'
                 break
         self.tls = True
-        logging.debug('Established TLS connection with {}:{}'.format(self.host, self.port))
+        logging.debug('Established TLS connection with {}:{}'.format(self.host_print, self.port))
 
     def _send_message(self, m):
         if type(m) == message.Message and m.command == b'object':
-            logging.debug('{}:{} <- {}'.format(self.host, self.port, structure.Object.from_message(m)))
+            logging.debug('{}:{} <- {}'.format(self.host_print, self.port, structure.Object.from_message(m)))
         else:
-            logging.debug('{}:{} <- {}'.format(self.host, self.port, m))
+            logging.debug('{}:{} <- {}'.format(self.host_print, self.port, m))
         self.buffer_send += m.to_bytes()
 
     def _on_connection_fully_established(self):
-        logging.info('Established Bitmessage protocol connection to {}:{}'.format(self.host, self.port))
+        logging.info('Established Bitmessage protocol connection to {}:{}'.format(self.host_print, self.port))
         self.on_connection_fully_established_scheduled = False
-        if self.remote_version.services & 2:  # NODE_SSL
+        if self.remote_version.services & 2 and self.network == 'ip':  # NODE_SSL
             self._do_tls_handshake()
         with shared.objects_lock:
             if len(shared.objects) > 0:
@@ -182,11 +192,12 @@ class Connection(threading.Thread):
                     else:
                         self.send_queue.put(message.Inv(to_send))
                         to_send.clear()
-        addr = {structure.NetAddr(c.remote_version.services, c.host, c.port) for c in shared.connections.copy() if not c.server and c.status == 'fully_established'}
+        addr = {structure.NetAddr(c.remote_version.services, c.host, c.port) for c in shared.connections.copy() if c.network != 'i2p' and not c.server and c.status == 'fully_established'}
+        addr = set()
         if len(shared.node_pool) > 10:
-            addr.update({structure.NetAddr(1, a[0], a[1]) for a in random.sample(shared.node_pool, 10)})
+            addr.update({structure.NetAddr(1, a[0], a[1]) for a in random.sample(shared.node_pool, 10) if a[1] != 'i2p'})
         if len(shared.unchecked_node_pool) > 10:
-            addr.update({structure.NetAddr(1, a[0], a[1]) for a in random.sample(shared.unchecked_node_pool, 10)})
+            addr.update({structure.NetAddr(1, a[0], a[1]) for a in random.sample(shared.unchecked_node_pool, 10) if a[1] != 'i2p'})
         if len(addr) != 0:
             self.send_queue.put(message.Addr(addr))
         self.status = 'fully_established'
@@ -212,7 +223,7 @@ class Connection(threading.Thread):
                     h = message.Header.from_bytes(self.buffer_receive[:shared.header_length])
                 except ValueError as e:
                     self.status = 'disconnecting'
-                    logging.warning('Received malformed message from {}:{}: {}'.format(self.host, self.port, e))
+                    logging.warning('Received malformed message from {}:{}: {}'.format(self.host_print, self.port, e))
                     break
                 self.next_message_size += h.payload_length
             else:
@@ -220,7 +231,7 @@ class Connection(threading.Thread):
                     m = message.Message.from_bytes(self.buffer_receive[:self.next_message_size])
                 except ValueError as e:
                     self.status = 'disconnecting'
-                    logging.warning('Received malformed message from {}:{}, {}'.format(self.host, self.port, e))
+                    logging.warning('Received malformed message from {}:{}, {}'.format(self.host_print, self.port, e))
                     break
                 self.next_header = True
                 self.buffer_receive = self.buffer_receive[self.next_message_size:]
@@ -230,13 +241,13 @@ class Connection(threading.Thread):
                     self._process_message(m)
                 except ValueError as e:
                     self.status = 'disconnecting'
-                    logging.warning('Received malformed message from {}:{}: {}'.format(self.host, self.port, e))
+                    logging.warning('Received malformed message from {}:{}: {}'.format(self.host_print, self.port, e))
                     break
 
     def _process_message(self, m):
         if m.command == b'version':
             version = message.Version.from_bytes(m.to_bytes())
-            logging.debug('{}:{} -> {}'.format(self.host, self.port, str(version)))
+            logging.debug('{}:{} -> {}'.format(self.host_print, self.port, str(version)))
             if version.protocol_version != shared.protocol_version or version.nonce == shared.nonce:
                 self.status = 'disconnecting'
                 self.send_queue.put(None)
@@ -250,16 +261,19 @@ class Connection(threading.Thread):
                     shared.node_pool.add((self.host, self.port))
                 shared.address_advertise_queue.put(structure.NetAddr(shared.services, version.host, shared.listening_port))
                 if self.server:
-                    self.send_queue.put(message.Version(self.host, self.port))
+                    if self.network == 'ip':
+                        self.send_queue.put(message.Version(self.host, self.port))
+                    else:
+                        self.send_queue.put(message.Version('127.0.0.1', 7656))
         elif m.command == b'verack':
             self.verack_received = True
-            logging.debug('{}:{} -> {}'.format(self.host, self.port, 'verack'))
+            logging.debug('{}:{} -> {}'.format(self.host_print, self.port, 'verack'))
             if self.server:
                 self.send_queue.put('fully_established')
 
         elif m.command == b'inv':
             inv = message.Inv.from_message(m)
-            logging.debug('{}:{} -> {}'.format(self.host, self.port, inv))
+            logging.debug('{}:{} -> {}'.format(self.host_print, self.port, inv))
             to_get = inv.vectors.copy()
             to_get.difference_update(shared.objects.keys())
             self.vectors_to_get.update(to_get)
@@ -267,27 +281,27 @@ class Connection(threading.Thread):
             self.vectors_to_send.difference_update(inv.vectors)
         elif m.command == b'object':
             obj = structure.Object.from_message(m)
-            logging.debug('{}:{} -> {}'.format(self.host, self.port, obj))
+            logging.debug('{}:{} -> {}'.format(self.host_print, self.port, obj))
             if obj.is_valid() and obj.vector not in shared.objects:
                 with shared.objects_lock:
                     shared.objects[obj.vector] = obj
                 shared.vector_advertise_queue.put(obj.vector)
         elif m.command == b'getdata':
             getdata = message.GetData.from_message(m)
-            logging.debug('{}:{} -> {}'.format(self.host, self.port, getdata))
+            logging.debug('{}:{} -> {}'.format(self.host_print, self.port, getdata))
             self.vectors_to_send.update(getdata.vectors)
         elif m.command == b'addr':
             addr = message.Addr.from_message(m)
-            logging.debug('{}:{} -> {}'.format(self.host, self.port, addr))
+            logging.debug('{}:{} -> {}'.format(self.host_print, self.port, addr))
             for a in addr.addresses:
                 shared.unchecked_node_pool.add((a.host, a.port))
         elif m.command == b'ping':
-            logging.debug('{}:{} -> ping'.format(self.host, self.port))
+            logging.debug('{}:{} -> ping'.format(self.host_print, self.port))
             self.send_queue.put(message.Message(b'pong', b''))
         elif m.command == b'error':
-            logging.error('{}:{} -> error: {}'.format(self.host, self.port, m.payload))
+            logging.error('{}:{} -> error: {}'.format(self.host_print, self.port, m.payload))
         else:
-            logging.debug('{}:{} -> {}'.format(self.host, self.port, m))
+            logging.debug('{}:{} -> {}'.format(self.host_print, self.port, m))
 
     def _request_objects(self):
         if self.vectors_to_get:

minode/i2p/controller.py

@@ -0,0 +1,83 @@
+# -*- coding: utf-8 -*-
+import base64
+import logging
+import os
+import socket
+import threading
+
+from i2p.util import receive_line, pub_from_priv
+import shared
+
+
+class I2PController(threading.Thread):
+    def __init__(self, host='127.0.0.1', port=7656, dest_priv=b''):
+        super().__init__(name='I2P Controller')
+
+        self.host = host
+        self.port = port
+        self.nick = b'MiNode_' + base64.b16encode(os.urandom(4)).lower()
+
+        self.s = socket.create_connection((self.host, self.port))
+
+        self.version_reply = []
+
+        self.init_connection()
+
+        if dest_priv:
+            self.dest_priv = dest_priv
+            self.dest_pub = pub_from_priv(dest_priv)
+        else:
+            self.dest_priv = b''
+            self.dest_pub = b''
+            self.generate_destination()
+
+        self.create_session()
+
+    def _receive_line(self):
+        line = receive_line(self.s)
+        logging.debug('I2PController <- ' + str(line))
+        return line
+
+    def _send(self, command):
+        logging.debug('I2PController -> ' + str(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()
+        assert b'RESULT=OK' in self.version_reply
+
+    def generate_destination(self):
+        if b'VERSION=3.0' in self.version_reply:
+            # We will now receive old DSA_SHA1 destination :(
+            self._send(b'DEST GENERATE\n')
+        else:
+            self._send(b'DEST GENERATE SIGNATURE_TYPE=EdDSA_SHA512_Ed25519\n')
+
+        reply = self._receive_line().split()
+        for par in reply:
+            if par.startswith(b'PUB='):
+                self.dest_pub = par.replace(b'PUB=', b'')
+            if par.startswith(b'PRIV='):
+                self.dest_priv = par.replace(b'PRIV=', b'')
+        assert self.dest_priv
+
+    def create_session(self):
+        self._send(b'SESSION CREATE STYLE=STREAM ID=' + self.nick + b' DESTINATION=' + self.dest_priv + b'\n')
+        reply = self._receive_line().split()
+        assert b'RESULT=OK' in reply
+
+    def run(self):
+        self.s.settimeout(1)
+        while True:
+            if not shared.shutting_down:
+                try:
+                    msg = self._receive_line().split(b' ')
+                    if msg[0] == b'PING':
+                        self._send(b'PONG ' + msg[1] + b'\n')
+                except socket.timeout:
+                    pass
+            else:
+                logging.debug('Shutting down I2P Controller')
+                self.s.close()
+                break

minode/i2p/dialer.py

@@ -0,0 +1,43 @@
+# -*- coding: utf-8 -*-
+import logging
+import socket
+
+from connection import Connection
+from i2p.util import receive_line
+
+
+class I2PDialer(object):
+    def __init__(self, destination, nick, host='127.0.0.1', port=7656):
+
+        self.host = host
+        self.port = port
+
+        self.nick = nick
+        self.destination = destination
+
+        self.s = socket.create_connection((self.host, self.port))
+
+        self.version_reply = []
+
+        self._connect()
+
+    def _receive_line(self):
+        line = receive_line(self.s)
+        logging.debug('I2PDialer <-' + str(line))
+        return line
+
+    def _send(self, command):
+        logging.debug('I2PDialer ->' + str(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()
+        assert b'RESULT=OK' in self.version_reply
+
+        self._send(b'STREAM CONNECT ID=' + self.nick + b' DESTINATION=' + self.destination + b'\n')
+        reply = self._receive_line().split(b' ')
+        assert b'RESULT=OK' in reply
+
+    def get_connection(self):
+        return Connection(self.destination, 'i2p', self.s, 'i2p', False, self.destination)

minode/i2p/listener.py

@@ -0,0 +1,58 @@
+# -*- coding: utf-8 -*-
+import logging
+import socket
+import threading
+
+from connection import Connection
+from i2p.util import receive_line
+import shared
+
+
+class I2PListener(threading.Thread):
+    def __init__(self, nick, host='127.0.0.1', port=7656):
+        super().__init__(name='I2P Listener')
+
+        self.host = host
+        self.port = port
+        self.nick = nick
+
+        self.s = None
+
+        self.version_reply = []
+
+        self.create_socket()
+
+    def _receive_line(self):
+        line = receive_line(self.s)
+        logging.debug('I2PListener <-' + str(line))
+        return line
+
+    def _send(self, command):
+        logging.debug('I2PListener ->' + str(command))
+        self.s.sendall(command)
+
+    def create_socket(self):
+        self.s = socket.create_connection((self.host, self.port))
+        self._send(b'HELLO VERSION MIN=3.0 MAX=3.3\n')
+        self.version_reply = self._receive_line().split()
+        assert b'RESULT=OK' in self.version_reply
+
+        self._send(b'STREAM ACCEPT ID=' + self.nick + b'\n')
+        reply = self._receive_line().split(b' ')
+        assert b'RESULT=OK' in reply
+
+        self.s.settimeout(1)
+
+    def run(self):
+        while not shared.shutting_down:
+            try:
+                destination = self._receive_line().split()[0]
+                print(destination)
+                logging.info('Incoming I2P connection from: {}'.format(destination))
+                c = Connection(destination, 'i2p', self.s, 'i2p', True, destination)
+                c.start()
+                shared.connections.add(c)
+                self.create_socket()
+            except socket.timeout:
+                pass
+        logging.debug('Shutting down I2P Listener')

minode/i2p/util.py

@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+import base64
+import hashlib
+
+
+def receive_line(s):
+    data = b''
+    while b'\n' not in data:
+        d = s.recv(4096)
+        if not d:
+            raise ConnectionResetError
+        data += d
+    data = data.splitlines()
+    return data[0]
+
+
+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
+
+
+def b32_from_pub(pub):
+    return base64.b32encode(hashlib.sha256(base64.b64decode(pub, b'-~')).digest()).replace(b"=", b"").lower() + b'.b32.i2p'

minode/i2p_test.py

@@ -0,0 +1,15 @@
+import logging
+
+from i2p.controller import I2PController
+from i2p.listener import I2PListener
+
+logging.basicConfig(level=logging.DEBUG, format='[%(asctime)s] [%(levelname)s] %(message)s')
+
+i2p_controller = I2PController()
+
+i2p_controller.start()
+
+session_nick = i2p_controller.nick
+
+i2p_listener = I2PListener(session_nick)
+i2p_listener.start()

minode/listener.py

@@ -31,7 +31,7 @@ class Listener(threading.Thread):
                     if len(shared.connections) > shared.connection_limit:
                         conn.close()
                     else:
-                        c = Connection(addr[0], addr[1], conn)
+                        c = Connection(addr[0], addr[1], conn, True)
                         c.start()
                         shared.connections.add(c)
             except socket.timeout:

minode/main.py

@@ -10,6 +10,8 @@ import socket
 from advertiser import Advertiser
 from manager import Manager
 from listener import Listener
+import i2p.controller
+import i2p.listener
 import shared
 
 
@@ -27,6 +29,7 @@ def parse_arguments():
     parser.add_argument('--no-outgoing', help='Do not send outgoing connections', action='store_true')
     parser.add_argument('--trusted-peer', help='Specify a trusted peer we should connect to')
     parser.add_argument('--connection-limit', help='Maximum number of connections', type=int)
+    parser.add_argument('--i2p', help='Enable I2P support (uses SAMv3)', action='store_true')
 
     args = parser.parse_args()
     if args.port:
@@ -43,19 +46,25 @@ def parse_arguments():
     if args.no_outgoing:
         shared.send_outgoing_connections = False
     if args.trusted_peer:
-        colon_count = args.trusted_peer.count(':')
-        if colon_count == 0:
-            shared.trusted_peer = (args.trusted_peer, 8444)
-        if colon_count == 1:
-            addr = args.trusted_peer.split(':')
-            shared.trusted_peer = (addr[0], int(addr[1]))
-        if colon_count >= 2:
-            # IPv6 <3
-            addr = args.trusted_peer.split(']:')
-            addr[0] = addr[0][1:]
-            shared.trusted_peer = (addr[0], int(addr[1]))
+        if len(args.trusted_peer) > 50:
+            # I2P
+            shared.trusted_peer = (args.trusted_peer.encode(), 'i2p')
+        else:
+            colon_count = args.trusted_peer.count(':')
+            if colon_count == 0:
+                shared.trusted_peer = (args.trusted_peer, 8444)
+            if colon_count == 1:
+                addr = args.trusted_peer.split(':')
+                shared.trusted_peer = (addr[0], int(addr[1]))
+            if colon_count >= 2:
+                # IPv6 <3
+                addr = args.trusted_peer.split(']:')
+                addr[0] = addr[0][1:]
+                shared.trusted_peer = (addr[0], int(addr[1]))
     if args.connection_limit:
         shared.connection_limit = args.connection_limit
+    if args.i2p:
+        shared.i2p_enabled = True
 
 
 def main():
@@ -112,6 +121,47 @@ def main():
     advertiser = Advertiser()
     advertiser.start()
 
+    if shared.i2p_enabled:
+        dest_priv = b''
+
+        try:
+            with open(shared.data_directory + 'i2p_dest_priv.key', mode='br') as file:
+                dest_priv = file.read()
+                logging.debug('Loaded I2P destination private key.')
+        except Exception as e:
+            logging.warning('Error while loading I2P destination private key.')
+            logging.warning(e)
+
+        logging.info('Starting I2P Controller and creating tunnels. This may take a while.')
+        i2p_controller = i2p.controller.I2PController(shared.i2p_sam_host, shared.i2p_sam_port, dest_priv)
+        i2p_controller.start()
+
+        shared.i2p_dest_pub = i2p_controller.dest_pub
+        shared.i2p_session_nick = i2p_controller.nick
+
+        logging.info('Local I2P destination: {}'.format(shared.i2p_dest_pub.decode()))
+        logging.info('I2P session nick: {}'.format(shared.i2p_session_nick.decode()))
+
+        logging.info('Starting I2P Listener')
+        i2p_listener = i2p.listener.I2PListener(i2p_controller.nick)
+        i2p_listener.start()
+
+        try:
+            with open(shared.data_directory + 'i2p_dest_priv.key', mode='bw') as file:
+                file.write(i2p_controller.dest_priv)
+                logging.debug('Saved I2P destination private key.')
+        except Exception as e:
+            logging.warning('Error while saving I2P destination private key.')
+            logging.warning(e)
+
+        try:
+            with open(shared.data_directory + 'i2p_dest.pub', mode='bw') as file:
+                file.write(shared.i2p_dest_pub)
+                logging.debug('Saved I2P destination public key.')
+        except Exception as e:
+            logging.warning('Error while saving I2P destination public key.')
+            logging.warning(e)
+
     listener_ipv4 = None
     listener_ipv6 = None
 

minode/manager.py

@@ -8,6 +8,7 @@ import threading
 import time
 
 from connection import Connection
+from i2p.dialer import I2PDialer
 import shared
 
 
@@ -77,8 +78,16 @@ class Manager(threading.Thread):
         for addr in to_connect:
             if addr[0] in hosts:
                 continue
-            c = Connection(addr[0], addr[1])
-            c.start()
+            if addr[1] == 'i2p' and shared.i2p_enabled:
+                if shared.i2p_session_nick:
+                    c = I2PDialer(addr[0], shared.i2p_session_nick, shared.i2p_sam_host, shared.i2p_sam_port).get_connection()
+                    c.start()
+                else:
+                    logging.debug('We were going to connect to an I2P peer but our tunnels are not ready')
+                    continue
+            else:
+                c = Connection(addr[0], addr[1])
+                c.start()
             hosts.add(c.host)
             with shared.connections_lock:
                 shared.connections.add(c)

minode/shared.py

@@ -23,6 +23,12 @@ user_agent = b'/MiNode:0.2.2/'
 timeout = 600
 header_length = 24
 
+i2p_enabled = False
+i2p_sam_host = '127.0.0.1'
+i2p_sam_port = 7656
+i2p_session_nick = b''
+i2p_dest_pub = b''
+
 nonce_trials_per_byte = 1000
 payload_length_extra_bytes = 1000
 

start.sh

@@ -1,2 +1,2 @@
 #!/bin/sh
-python3 src/main.py "$@"
+python3 minode/main.py "$@"