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(...)
50 # .target_requests_outstanding
52 if ip not in c.network:
53 raise ValueError('client %s not in network' % ip)
55 for k in ('max_batch_down','max_queue_time','http_timeout',
56 'target_requests_outstanding'):
57 req = cfg.getint(cs, k)
58 limit = cfg.getint('limits',k)
59 self.__dict__[k] = min(req, limit)
61 self._pq = PacketQueue(str(ip), self.max_queue_time)
64 raise ValueError('multiple client cfg sections for %s' % ip)
67 self._log(DBG.INIT, 'new')
69 def _log(self, dflag, msg, **kwargs):
70 log_debug(dflag, ('client %s: ' % self._ip)+msg, **kwargs)
72 def process_arriving_data(self, d):
73 self._log(DBG.FLOW, "req data (enc'd)", d=d)
75 for packet in slip.decode(d):
76 (saddr, daddr) = packet_addrs(packet)
78 raise ValueError('wrong source address %s' % saddr)
79 route(packet, self._ip, saddr, daddr)
81 def _req_cancel(self, request):
82 self._log(DBG.HTTP_CTRL, 'cancel', idof=request)
85 def _req_error(self, err, request):
86 self._log(DBG.HTTP_CTRL, 'error %s' % err, idof=request)
87 self._req_cancel(request)
89 def queue_outbound(self, packet):
90 self._pq.append(packet)
91 self._check_outbound()
93 def new_request(self, request):
94 request.setHeader('Content-Type','application/octet-stream')
95 reactor.callLater(self.http_timeout, self._req_cancel, request)
96 request.notifyFinish().addErrback(self._req_error, request)
97 self._rq.append(request)
98 self._check_outbound()
100 def _req_write(self, req, d):
101 self._log(DBG.HTTP, 'req_write ', idof=req, d=d)
104 def _check_outbound(self):
105 log_debug(DBG.HTTP_CTRL, 'CHKO')
107 try: request = self._rq[0]
108 except IndexError: request = None
109 if request and request.finished:
110 self._log(DBG.HTTP_CTRL, 'CHKO req finished, discard', idof=request)
114 if not self._pq.nonempty():
115 # no packets, oh well
116 self._log(DBG.HTTP_CTRL, 'CHKO no packets, OUT-DONE', idof=request)
121 self._log(DBG.HTTP_CTRL, 'CHKO no request, OUT-DONE', idof=request)
124 self._log(DBG.HTTP_CTRL, 'CHKO processing', idof=request)
125 # request, and also some non-expired packets
126 self._pq.process((lambda: request.sentLength),
127 (lambda d: self._req_write(request, d)),
130 assert(request.sentLength)
133 self._log(DBG.HTTP, 'complete', idof=request)
134 # round again, looking for more to do
136 while len(self._rq) > self.target_requests_outstanding:
137 request = self._rq.popleft()
138 self._log(DBG.HTTP, 'CHKO above target, returning empty', idof=request)
141 def process_request(request, desca):
142 # find client, update config, etc.
143 metadata = request.args[b'm'][0]
144 metadata = metadata.split(b'\r\n')
145 (ci_s, pw, tro, cto) = metadata[0:4]
146 desca['m[0,2:3]'] = [ci_s, tro, cto]
147 ci_s = ci_s.decode('utf-8')
148 tro = int(tro); desca['tro']= tro
149 cto = int(cto); desca['cto']= cto
153 if pw != cl.pw: raise ValueError('bad password')
156 if tro != cl.target_requests_outstanding:
157 raise ValueError('tro must be %d' % cl.target_requests_outstanding)
159 if cto < cl.http_timeout:
160 raise ValueError('cto must be >= %d' % cl.http_timeout)
163 d = request.args[b'd'][0]
165 desca['dlen'] = len(d)
170 log_http(desca, 'processing', idof=id(request), d=d)
172 d = mime_translate(d)
174 cl.process_arriving_data(d)
175 cl.new_request(request)
177 def log_http(desca, msg, **kwargs):
179 kwargs['d'] = desca['d']
183 log_debug(DBG.HTTP, msg + repr(desca), **kwargs)
185 class IphttpResource(twisted.web.resource.Resource):
187 def render_POST(self, request):
188 log_debug(DBG.HTTP_FULL,
189 'req recv: ' + repr(request) + ' ' + repr(request.args),
192 try: process_request(request, desca)
193 except Exception as e:
194 emsg = traceback.format_exc()
195 log_http(desca, 'RETURNING EXCEPTION ' + emsg)
196 request.setHeader('Content-Type','text/plain; charset="utf-8"')
197 request.setResponseCode(400)
198 return (emsg + ' # ' + repr(desca) + '\r\n').encode('utf-8')
199 log_debug(DBG.HTTP_CTRL, '...', idof=id(request))
202 def render_GET(self, request):
203 log_debug(DBG.HTTP, 'GET request')
204 return b'<html><body>hippotat</body></html>'
207 resource = IphttpResource()
208 site = twisted.web.server.Site(resource)
210 ep = sa.make_endpoint()
211 crash_on_defer(ep.listen(site))
212 log_debug(DBG.INIT, 'listening on %s' % sa)
214 #---------- config and setup ----------
217 process_cfg_common_always()
219 process_cfg_network()
222 c.relay = cfg.get('virtual','relay')
223 except NoOptionError:
224 for search in c.network.hosts():
225 if search == c.server: continue
230 process_cfg_clients(Client)
232 process_cfg_ipif('server',
235 ('rnets','network')))
239 start_ipif(c.ipif_command, (lambda p,s,d: route(p,"[ipif]",s,d)))