183 lines
6.4 KiB
Python
183 lines
6.4 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
import asyncio
|
|
import socket
|
|
|
|
import netifaces
|
|
from zeroconf import (
|
|
ServiceBrowser, ServiceInfo, ServiceStateChange
|
|
)
|
|
from zeroconf.asyncio import AsyncZeroconf
|
|
from tornado.ioloop import PeriodicCallback
|
|
|
|
import settings
|
|
import state
|
|
from tor_request import get_opener
|
|
from utils import time_cache
|
|
|
|
import logging
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
@time_cache(3)
|
|
def can_connect(**data):
|
|
try:
|
|
opener = get_opener(data['id'])
|
|
headers = {
|
|
'User-Agent': settings.USER_AGENT,
|
|
'X-Node-Protocol': settings.NODE_PROTOCOL,
|
|
'Accept-Encoding': 'gzip',
|
|
}
|
|
if ':' in data['host']:
|
|
url = 'https://[{host}]:{port}'.format(**data)
|
|
else:
|
|
url = 'https://{host}:{port}'.format(**data)
|
|
opener.addheaders = list(zip(headers.keys(), headers.values()))
|
|
opener.timeout = 1
|
|
r = opener.open(url)
|
|
version = r.headers.get('X-Node-Protocol', None)
|
|
if version != settings.NODE_PROTOCOL:
|
|
logger.debug('version does not match local: %s remote %s (%s)', settings.NODE_PROTOCOL, version, data['id'])
|
|
return False
|
|
c = r.read()
|
|
return True
|
|
except:
|
|
pass
|
|
#logger.debug('failed to connect to local node %s', data, exc_info=True)
|
|
return False
|
|
|
|
def get_broadcast_interfaces():
|
|
return list(set(
|
|
addr['addr']
|
|
for iface in netifaces.interfaces()
|
|
for addr in netifaces.ifaddresses(iface).get(socket.AF_INET, [])
|
|
if addr.get('netmask') != '255.255.255.255' and addr.get('broadcast')
|
|
))
|
|
|
|
class LocalNodes(dict):
|
|
service_type = '_oml._tcp.local.'
|
|
local_info = None
|
|
local_ips = None
|
|
|
|
def __init__(self):
|
|
if not settings.server.get('localnode_discovery'):
|
|
return
|
|
self.setup()
|
|
self._ip_changed = PeriodicCallback(self._update_if_ip_changed, 60000)
|
|
state.main.add_callback(self._ip_changed.start)
|
|
|
|
def setup(self):
|
|
self.local_ips = get_broadcast_interfaces()
|
|
self.zeroconf = {ip: AsyncZeroconf(interfaces=[ip]) for ip in self.local_ips}
|
|
asyncio.create_task(self.register_service())
|
|
self.browse()
|
|
|
|
async def _update_if_ip_changed(self):
|
|
local_ips = get_broadcast_interfaces()
|
|
username = settings.preferences.get('username', 'anonymous')
|
|
if local_ips != self.local_ips or self.username != username:
|
|
await self.close()
|
|
self.setup()
|
|
|
|
def browse(self):
|
|
self.browser = {
|
|
ip: ServiceBrowser(self.zeroconf[ip].zeroconf, self.service_type, handlers=[self.on_service_state_change])
|
|
for ip in self.zeroconf
|
|
}
|
|
|
|
async def register_service(self):
|
|
if self.local_info:
|
|
for local_ip, local_info in self.local_info:
|
|
self.zeroconf[local_ip].async_unregister_service(local_info)
|
|
self.local_info = None
|
|
|
|
local_name = socket.gethostname().partition('.')[0] + '.local.'
|
|
port = settings.server['node_port']
|
|
self.local_info = []
|
|
self.username = settings.preferences.get('username', 'anonymous')
|
|
desc = {
|
|
'username': self.username,
|
|
'id': settings.USER_ID,
|
|
}
|
|
tasks = []
|
|
for i, local_ip in enumerate(get_broadcast_interfaces()):
|
|
if i:
|
|
name = '%s [%s].%s' % (desc['username'], i, self.service_type)
|
|
else:
|
|
name = '%s.%s' % (desc['username'], self.service_type)
|
|
|
|
addresses = [socket.inet_aton(local_ip)]
|
|
local_info = ServiceInfo(self.service_type, name, port, 0, 0, desc, local_name, addresses=addresses)
|
|
task = self.zeroconf[local_ip].async_register_service(local_info)
|
|
tasks.append(task)
|
|
self.local_info.append((local_ip, local_info))
|
|
await asyncio.gather(*tasks)
|
|
|
|
def __del__(self):
|
|
self.close()
|
|
|
|
async def close(self):
|
|
if self.local_info:
|
|
tasks = []
|
|
for local_ip, local_info in self.local_info:
|
|
try:
|
|
task = self.zeroconf[local_ip].async_unregister_service(local_info)
|
|
tasks.append(task)
|
|
except:
|
|
logger.debug('exception closing zeroconf', exc_info=True)
|
|
self.local_info = None
|
|
if self.zeroconf:
|
|
for local_ip in self.zeroconf:
|
|
try:
|
|
task = self.zeroconf[local_ip].async_close()
|
|
tasks.append(task)
|
|
except:
|
|
logger.debug('exception closing zeroconf', exc_info=True)
|
|
self.zeroconf = None
|
|
for id in list(self):
|
|
self.pop(id, None)
|
|
await asyncio.gather(*tasks)
|
|
|
|
def on_service_state_change(self, zeroconf, service_type, name, state_change):
|
|
try:
|
|
info = zeroconf.get_service_info(service_type, name)
|
|
except zeroconf._exceptions.NotRunningException:
|
|
return
|
|
if info and b'id' in info.properties:
|
|
id = info.properties[b'id'].decode()
|
|
if id == settings.USER_ID:
|
|
return
|
|
if len(id) != settings.ID_LENGTH:
|
|
return
|
|
if state_change is ServiceStateChange.Added:
|
|
new = id not in self
|
|
self[id] = {
|
|
'id': id,
|
|
'host': socket.inet_ntoa(info.addresses[0]),
|
|
'port': info.port
|
|
}
|
|
if info.properties:
|
|
for key, value in info.properties.items():
|
|
key = key.decode()
|
|
self[id][key] = value.decode()
|
|
logger.debug(
|
|
'%s: %s [%s] (%s:%s)',
|
|
'add' if new else 'update',
|
|
self[id].get('username', 'anon'),
|
|
id,
|
|
self[id]['host'],
|
|
self[id]['port']
|
|
)
|
|
if state.tasks and id in self:
|
|
state.tasks.queue('addlocalinfo', self[id])
|
|
elif state_change is ServiceStateChange.Removed:
|
|
logger.debug('remove: %s', id)
|
|
self.pop(id, None)
|
|
if state.tasks:
|
|
state.tasks.queue('removelocalinfo', id)
|
|
|
|
def get_data(self, user_id):
|
|
data = self.get(user_id)
|
|
if data and can_connect(**data):
|
|
return data
|
|
return None
|