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',
58 'target_requests_outstanding'):
59 req = cfg.getint(cs, k)
60 limit = cfg.getint('limits',k)
61 self.__dict__[k] = min(req, limit)
63 self._pq = PacketQueue(str(ip), self.max_queue_time)
66 raise ValueError('multiple client cfg sections for %s' % ip)
69 self._log(DBG.INIT, 'new')
71 def _log(self, dflag, msg, **kwargs):
72 log_debug(dflag, ('client %s: ' % self._ip)+msg, **kwargs)
74 def process_arriving_data(self, d):
75 self._log(DBG.FLOW, "req data (enc'd)", d=d)
77 for packet in slip.decode(d):
78 (saddr, daddr) = packet_addrs(packet)
80 raise ValueError('wrong source address %s' % saddr)
81 route(packet, self._ip, saddr, daddr)
83 def _req_cancel(self, request):
84 self._log(DBG.HTTP_CTRL, 'cancel', idof=request)
87 def _req_error(self, err, request):
88 self._log(DBG.HTTP_CTRL, 'error %s' % err, idof=request)
89 self._req_cancel(request)
91 def queue_outbound(self, packet):
92 self._pq.append(packet)
93 self._check_outbound()
95 def _req_fin(self, dummy, request, cl):
96 self._log(DBG.HTTP_CTRL, '_req_fin ' + repr(dummy), idof=request)
98 except twisted.internet.error.AlreadyCalled: pass
100 def new_request(self, request):
101 request.setHeader('Content-Type','application/octet-stream')
102 cl = reactor.callLater(self.http_timeout, self._req_cancel, request)
103 nf = request.notifyFinish()
104 nf.addErrback(self._req_error, request)
105 nf.addCallback(self._req_fin, request, cl)
106 self._rq.append(request)
107 self._check_outbound()
109 def _req_write(self, req, d):
110 self._log(DBG.HTTP, 'req_write ', idof=req, d=d)
113 def _check_outbound(self):
114 log_debug(DBG.HTTP_CTRL, 'CHKO')
116 try: request = self._rq[0]
117 except IndexError: request = None
118 if request and request.finished:
119 self._log(DBG.HTTP_CTRL, 'CHKO req finished, discard', idof=request)
123 if not self._pq.nonempty():
124 # no packets, oh well
125 self._log(DBG.HTTP_CTRL, 'CHKO no packets, OUT-DONE', idof=request)
130 self._log(DBG.HTTP_CTRL, 'CHKO no request, OUT-DONE', idof=request)
133 self._log(DBG.HTTP_CTRL, 'CHKO processing', idof=request)
134 # request, and also some non-expired packets
135 self._pq.process((lambda: request.sentLength),
136 (lambda d: self._req_write(request, d)),
139 assert(request.sentLength)
142 self._log(DBG.HTTP, 'complete', idof=request)
143 # round again, looking for more to do
145 while len(self._rq) > self.target_requests_outstanding:
146 request = self._rq.popleft()
147 self._log(DBG.HTTP, 'CHKO above target, returning empty', idof=request)
150 def process_request(request, desca):
151 # find client, update config, etc.
152 metadata = request.args[b'm'][0]
153 metadata = metadata.split(b'\r\n')
154 (ci_s, pw, tro, cto) = metadata[0:4]
155 desca['m[0,2:3]'] = [ci_s, tro, cto]
156 ci_s = ci_s.decode('utf-8')
157 tro = int(tro); desca['tro']= tro
158 cto = int(cto); desca['cto']= cto
162 if pw != cl.pw: raise ValueError('bad password')
165 if tro != cl.target_requests_outstanding:
166 raise ValueError('tro must be %d' % cl.target_requests_outstanding)
168 if cto < cl.http_timeout:
169 raise ValueError('cto must be >= %d' % cl.http_timeout)
172 d = request.args[b'd'][0]
174 desca['dlen'] = len(d)
179 log_http(desca, 'processing', idof=id(request), d=d)
181 d = mime_translate(d)
183 cl.process_arriving_data(d)
184 cl.new_request(request)
186 def log_http(desca, msg, **kwargs):
188 kwargs['d'] = desca['d']
192 log_debug(DBG.HTTP, msg + repr(desca), **kwargs)
194 class IphttpResource(twisted.web.resource.Resource):
196 def render_POST(self, request):
197 log_debug(DBG.HTTP_FULL,
198 'req recv: ' + repr(request) + ' ' + repr(request.args),
201 try: process_request(request, desca)
202 except Exception as e:
203 emsg = traceback.format_exc()
204 log_http(desca, 'RETURNING EXCEPTION ' + emsg)
205 request.setHeader('Content-Type','text/plain; charset="utf-8"')
206 request.setResponseCode(400)
207 return (emsg + ' # ' + repr(desca) + '\r\n').encode('utf-8')
208 log_debug(DBG.HTTP_CTRL, '...', idof=id(request))
211 def render_GET(self, request):
212 log_debug(DBG.HTTP, 'GET request')
213 return b'<html><body>hippotat</body></html>'
216 resource = IphttpResource()
217 site = twisted.web.server.Site(resource)
219 ep = sa.make_endpoint()
220 crash_on_defer(ep.listen(site))
221 log_debug(DBG.INIT, 'listening on %s' % sa)
223 #---------- config and setup ----------
225 def process_cfg(putative_servers, putative_clients):
227 c.server = cfg.get('SERVER','server')
229 process_cfg_common(c, c.server)
230 process_cfg_saddrs(c, c.server)
231 process_cfg_vnetwork(c, c.server)
232 process_cfg_vaddr(c, c.server)
234 for (ci,cs) in putative_clients.items():
236 sections = cfg_process_client_common(cc,c.server,cs,ci):
237 if not sections: continue
238 cfg_process_client_limited(cc,c.server,sections, 'max_batch_down')
239 cfg_process_client_limited(cc,c.server,sections, 'max_queue_time')
242 c.relay = cfg.get(c.server, 'relay')
243 except NoOptionError:
244 for search in c.network.hosts():
245 if search == c.server: continue
250 [c.server, 'DEFAULT'],
253 ('rnets','vnetwork')))
255 common_startup(process_cfg)
256 start_ipif(c.ipif_command, (lambda p,s,d: route(p,"[ipif]",s,d)))