8 import twisted.internet
9 from twisted.web.server import NOT_DONE_YET
11 #import twisted.web.server import Site
12 #from twisted.web.resource import Resource
20 max_batch_down = 65536
23 target_requests_outstanding = 3
24 ipif = userv root ipif %(local)s,%(peer)s,%(mtu)s,slip %(rnets)s
37 max_batch_down = 262144
39 max_request_time = 121
40 target_requests_outstanding = 10
43 #---------- "router" ----------
45 def route(packet, saddr, daddr):
46 print('TRACE ', saddr, daddr, packet)
47 try: client = clients[daddr]
48 except KeyError: dclient = None
49 if dclient is not None:
50 dclient.queue_outbound(packet)
51 elif saddr.is_link_local or daddr.is_link_local:
52 log_discard(packet, saddr, daddr, 'link-local')
53 elif daddr == c.server or daddr not in c.network:
54 print('TRACE INBOUND ', saddr, daddr, packet)
57 log_discard(packet, saddr, daddr, 'relay')
59 log_discard(packet, saddr, daddr, 'no client')
61 def log_discard(packet, saddr, daddr, why):
62 print('DROP ', saddr, daddr, why)
63 # syslog.syslog(syslog.LOG_DEBUG,
64 # 'discarded packet %s -> %s (%s)' % (saddr, daddr, why))
66 #---------- client ----------
69 def __init__(self, ip, cs, pw):
70 # instance data members
74 self._rq = collections.deque() # requests
75 # self._pq = PacketQueue(...)
80 # .target_requests_outstanding
82 if ip not in c.network:
83 raise ValueError('client %s not in network' % ip)
85 for k in ('max_batch_down','max_queue_time','max_request_time',
86 'target_requests_outstanding'):
87 req = cfg.getint(cs, k)
88 limit = cfg.getint('limits',k)
89 self.__dict__[k] = min(req, limit)
90 self._pq = PacketQueue(self.max_queue_time)
93 raise ValueError('multiple client cfg sections for %s' % ip)
96 def process_arriving_data(self, d):
97 for packet in slip.decode(d):
98 (saddr, daddr) = packet_addrs(packet)
100 raise ValueError('wrong source address %s' % saddr)
101 route(packet, saddr, daddr)
103 def _req_cancel(self, request):
106 def _req_error(self, err, request):
107 self._req_cancel(request)
109 def queue_outbound(self, packet):
110 self._pq.append(packet)
112 def http_request(self, request):
113 request.setHeader('Content-Type','application/octet-stream')
114 reactor.callLater(self.max_request_time, self._req_cancel, request)
115 request.notifyFinish().addErrback(self._req_error, request)
116 self._rq.append(request)
117 self._check_outbound()
119 def _check_outbound(self):
121 try: request = self._rq[0]
122 except IndexError: request = None
123 if request and request.finished:
127 if not self._pq.nonempty():
128 # no packets, oh well
135 # request, and also some non-expired packets
137 packet = self.pq.popleft()
138 if packet is None: break
140 encoded = slip.encode(packet)
142 if request.sentLength > 0:
143 if (request.sentLength + len(slip.delimiter)
144 + len(encoded) > self.max_batch_down):
146 request.write(slip.delimiter)
148 request.write(encoded)
151 assert(request.sentLength)
154 # round again, looking for more to do
156 while len(self._rq) > self.target_requests_outstanding:
157 request = self._rq.popleft()
160 class IphttpResource(twisted.web.resource.Resource):
162 def render_POST(self, request):
163 # find client, update config, etc.
164 ci = ipaddr(request.args['i'])
166 pw = request.args['pw']
167 if pw != c.pw: raise ValueError('bad password')
170 for r, w in (('mbd', 'max_batch_down'),
171 ('mqt', 'max_queue_time'),
172 ('mrt', 'max_request_time'),
173 ('tro', 'target_requests_outstanding')):
174 try: v = request.args[r]
175 except KeyError: continue
179 try: d = request.args['d']
180 except KeyError: d = ''
182 c.process_arriving_data(d)
183 c.new_request(request)
185 def render_GET(self, request):
186 return b'<html><body>hippotat</body></html>'
189 resource = IphttpResource()
190 site = twisted.web.server.Site(resource)
192 ep = sa.make_endpoint()
193 crash_on_defer(ep.listen(site))
195 #---------- config and setup ----------
198 process_cfg_common_always()
200 process_cfg_network()
203 c.relay = cfg.get('virtual','relay')
204 except NoOptionError:
205 for search in c.network.hosts():
206 if search == c.server: continue
211 process_cfg_clients(Client)
213 process_cfg_ipif('server',
216 ('rnets','network')))
218 common_startup(defcfg)
220 start_ipif(c.ipif_command, route)