work on lan transport, added service discovery logic

src/lan/__init__.py

@@ -0,0 +1,38 @@
+"""Onionr - Private P2P Communication.
+
+LAN manager
+"""
+from typing import TYPE_CHECKING
+from threading import Thread
+if TYPE_CHECKING:
+    from toomanyobjs import TooMany
+
+from . import server
+from .client import Client
+from .discover import learn_services, advertise_service
+"""
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+
+
+class LANManager:
+    """Initialize and start/top LAN transport threads."""
+
+    def __init__(self, too_many: "TooMany"):
+        self.too_many = too_many
+
+    def start(self):
+        Thread(target=learn_services, daemon=True).start()
+        Thread(target=advertise_service, daemon=True).start()
+

src/lan/client/__init__.py

@@ -0,0 +1,23 @@
+"""Onionr - Private P2P Communication.
+
+LAN transport client thread
+"""
+"""
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+
+
+class Client:
+    def __init__(self):
+        return

src/lan/discover.py

@@ -0,0 +1,65 @@
+"""Onionr - Private P2P Communication.
+
+Discover and publish private-network
+"""
+import socket
+import struct
+
+from .getip import lan_ips
+from utils.bettersleep import better_sleep
+"""
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""
+MCAST_GRP = '224.13.3.7'
+MCAST_PORT = 1337
+IS_ALL_GROUPS = True
+ANNOUNCE_LOOP_SLEEP = 30
+
+
+def learn_services():
+    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
+    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    if IS_ALL_GROUPS:
+        # on this port, receives ALL multicast groups
+        sock.bind(('', MCAST_PORT))
+    else:
+        # on this port, listen ONLY to MCAST_GRP
+        sock.bind((MCAST_GRP, MCAST_PORT))
+    mreq = struct.pack("4sl", socket.inet_aton(MCAST_GRP), socket.INADDR_ANY)
+
+    sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
+
+    while True:
+        rec_data = sock.recv(1024)
+        print('reced_data', rec_data)
+
+    sock.shutdown()
+    sock.close()
+
+
+def advertise_service():
+    # regarding socket.IP_MULTICAST_TTL
+    # ---------------------------------
+    # for all packets sent, after three hops on the network the packet will not
+    # be re-sent/broadcast (see https://www.tldp.org/HOWTO/Multicast-HOWTO-6.html)
+    MULTICAST_TTL = 3
+    ips = '-'.join(lan_ips)
+
+    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
+    sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, MULTICAST_TTL)
+    while True:
+        sock.sendto(f"onionr-{ips}".encode('utf-8'), (MCAST_GRP, MCAST_PORT))
+        better_sleep(ANNOUNCE_LOOP_SLEEP)
+    sock.shutdown()
+    sock.close()

src/lan/getip.py

@@ -0,0 +1,19 @@
+from ipaddress import IPv4Address
+
+from ifaddr import get_adapters
+
+lan_ips = []
+
+for adapter in get_adapters():
+    for ip in adapter.ips:
+        ip = ip.ip
+        try:
+            ip = IPv4Address(ip)
+            if not ip.is_private or ip.is_loopback:
+                raise ValueError
+        except ValueError:
+            # Raised if not ipv4 or not link local
+            continue
+        else:
+            lan_ips.append(ip.exploded)
+

src/lan/server/__init__.py

@@ -0,0 +1,18 @@
+"""Onionr - Private P2P Communication.
+
+LAN transport server thread
+"""
+"""
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""

src/onionrcommands/daemonlaunch/__init__.py

@@ -36,6 +36,7 @@ from utils.bettersleep import better_sleep
 from netcontroller.torcontrol.onionservicecreator import create_onion_service
 from .quotes import QUOTE
 from utils.boxprint import bordered
+from lan import LANManager
 """
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -162,6 +163,7 @@ def daemon():
 
     events.event('init', threaded=False)
     events.event('daemon_start')
+    LANManager(shared_state).start()
     communicator.startCommunicator(shared_state)
 
     clean_ephemeral_services()