7 import twisted.internet
8 from twisted.web.server import NOT_DONE_YET
10 #import twisted.web.server import Site
11 #from twisted.web.resource import Resource
17 #---------- "router" ----------
19 def route(packet, iface, saddr, daddr):
21 log_debug(DBG.ROUTE, 'route: %s -> %s: %s' % (saddr,daddr,dest), d=packet)
22 try: dclient = clients[daddr]
23 except KeyError: dclient = None
24 if dclient is not None:
26 dclient.queue_outbound(packet)
27 elif daddr == c.server or daddr not in c.network:
32 log_discard(packet, iface, saddr, daddr, 'relay')
34 lt('discard no-client')
35 log_discard(packet, iface, saddr, daddr, 'no-client')
37 #---------- client ----------
40 def __init__(self, ip, cs, pw):
41 # instance data members
45 self._rq = collections.deque() # requests
46 # self._pq = PacketQueue(...)
51 # .target_requests_outstanding
53 if ip not in c.network:
54 raise ValueError('client %s not in network' % ip)
56 for k in ('max_batch_down','max_queue_time','max_request_time',
57 'target_requests_outstanding'):
58 req = cfg.getint(cs, k)
59 limit = cfg.getint('limits',k)
60 self.__dict__[k] = min(req, limit)
62 self._pq = PacketQueue(str(ip), self.max_queue_time)
65 raise ValueError('multiple client cfg sections for %s' % ip)
68 self._log(DBG.INIT, 'new')
70 def _log(self, dflag, msg, **kwargs):
71 log_debug(dflag, ('client %s: ' % self._ip)+msg, **kwargs)
73 def process_arriving_data(self, d):
74 self._log(DBG.FLOW, "req data (enc'd)", d=d)
76 for packet in slip.decode(d):
77 (saddr, daddr) = packet_addrs(packet)
79 raise ValueError('wrong source address %s' % saddr)
80 route(packet, self._ip, saddr, daddr)
82 def _req_cancel(self, request):
83 self._log(DBG.HTTP_CTRL, 'cancel', idof=request)
86 def _req_error(self, err, request):
87 self._log(DBG.HTTP_CTRL, 'error %s' % err, idof=request)
88 self._req_cancel(request)
90 def queue_outbound(self, packet):
91 self._pq.append(packet)
92 self._check_outbound()
94 def new_request(self, request):
95 request.setHeader('Content-Type','application/octet-stream')
96 reactor.callLater(self.max_request_time, self._req_cancel, request)
97 request.notifyFinish().addErrback(self._req_error, request)
98 self._rq.append(request)
99 self._check_outbound()
101 def _check_outbound(self):
102 log_debug(DBG.HTTP_CTRL, 'CHKO')
104 try: request = self._rq[0]
105 except IndexError: request = None
106 if request and request.finished:
107 self._log(DBG.HTTP_CTRL, 'CHKO req finished, discard', idof=request)
111 if not self._pq.nonempty():
112 # no packets, oh well
113 self._log(DBG.HTTP_CTRL, 'CHKO no packets, OUT-DONE', idof=request)
118 self._log(DBG.HTTP_CTRL, 'CHKO no request, OUT-DONE', idof=request)
121 self._log(DBG.HTTP_CTRL, 'CHKO processing', idof=request)
122 # request, and also some non-expired packets
123 self._pq.process((lambda: request.sentLength),
127 assert(request.sentLength)
130 self._log(DBG.HTTP, 'complete', idof=request)
131 # round again, looking for more to do
133 while len(self._rq) > self.target_requests_outstanding:
134 request = self._rq.popleft()
135 self._log(DBG.HTTP, 'CHKO above target, returning empty', idof=request)
138 def process_request(request, desca):
139 # find client, update config, etc.
140 metadata = request.args[b'm'][0]
141 metadata = metadata.split(b'\r\n')
142 (ci_s, pw, tro) = metadata[0:3]
143 desca['m[0,2]'] = [ci_s, tro]
144 ci_s = ci_s.decode('utf-8')
150 if pw != cl.pw: raise ValueError('bad password')
153 if tro != cl.target_requests_outstanding:
154 raise ValueError('tro must be %d' % cl.target_requests_outstanding)
157 d = request.args[b'd'][0]
159 desca['dlen'] = len(d)
164 log_http(desca, 'processing', idof=id(request), d=d)
166 d = mime_translate(d)
168 cl.process_arriving_data(d)
169 cl.new_request(request)
171 def log_http(desca, msg, **kwargs):
173 kwargs['d'] = desca['d']
177 log_debug(DBG.HTTP, msg + repr(desca), **kwargs)
179 class IphttpResource(twisted.web.resource.Resource):
181 def render_POST(self, request):
182 log_debug(DBG.HTTP_FULL,
183 'req recv: ' + repr(request) + ' ' + repr(request.args),
186 try: process_request(request, desca)
187 except Exception as e:
188 emsg = traceback.format_exc()
189 log_http(desca, 'RETURNING EXCEPTION ' + emsg)
190 request.setHeader('Content-Type','text/plain; charset="utf-8"')
191 request.setResponseCode(400)
192 return (emsg + ' # ' + repr(desca) + '\r\n').encode('utf-8')
193 log_debug(DBG.HTTP_CTRL, '...', idof=id(request))
196 def render_GET(self, request):
197 log_debug(DBG.HTTP, 'GET request')
198 return b'<html><body>hippotat</body></html>'
201 resource = IphttpResource()
202 site = twisted.web.server.Site(resource)
204 ep = sa.make_endpoint()
205 crash_on_defer(ep.listen(site))
206 log_debug(DBG.INIT, 'listening on %s' % sa)
208 #---------- config and setup ----------
211 process_cfg_common_always()
213 process_cfg_network()
216 c.relay = cfg.get('virtual','relay')
217 except NoOptionError:
218 for search in c.network.hosts():
219 if search == c.server: continue
224 process_cfg_clients(Client)
226 process_cfg_ipif('server',
229 ('rnets','network')))
233 start_ipif(c.ipif_command, (lambda p,s,d: route(p,"[ipif]",s,d)))