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
19 #---------- "router" ----------
21 def route(packet, iface, saddr, daddr):
23 log_debug(DBG.ROUTE, 'route: %s -> %s: %s' % (saddr,daddr,dest), d=packet)
24 try: dclient = clients[daddr]
25 except KeyError: dclient = None
26 if dclient is not None:
28 dclient.queue_outbound(packet)
29 elif daddr == c.server or daddr not in c.network:
34 log_discard(packet, iface, saddr, daddr, 'relay')
36 lt('discard no-client')
37 log_discard(packet, iface, saddr, daddr, 'no-client')
39 #---------- client ----------
42 def __init__(self, ip, cs, pw):
43 # instance data members
47 self._rq = collections.deque() # requests
48 # self._pq = PacketQueue(...)
53 # .target_requests_outstanding
55 if ip not in c.network:
56 raise ValueError('client %s not in network' % ip)
58 for k in ('max_batch_down','max_queue_time','max_request_time',
59 'target_requests_outstanding'):
60 req = cfg.getint(cs, k)
61 limit = cfg.getint('limits',k)
62 self.__dict__[k] = min(req, limit)
64 self._pq = PacketQueue(str(ip), self.max_queue_time)
67 raise ValueError('multiple client cfg sections for %s' % ip)
70 self._log(DBG.INIT, 'new')
72 def _log(self, dflag, msg, **kwargs):
73 log_debug(dflag, ('client %s: ' % self._ip)+msg, **kwargs)
75 def process_arriving_data(self, d):
76 self._log(DBG.FLOW, 'req data', d=d)
78 for packet in slip.decode(d):
79 (saddr, daddr) = packet_addrs(packet)
81 raise ValueError('wrong source address %s' % saddr)
82 route(packet, self._ip, saddr, daddr)
84 def _req_cancel(self, request):
85 self._log(DBG.HTTP_CTRL, 'cancel', idof=request)
88 def _req_error(self, err, request):
89 self._log(DBG.HTTP_CTRL, 'error %s' % err, idof=request)
90 self._req_cancel(request)
92 def queue_outbound(self, packet):
93 self._pq.append(packet)
94 self._check_outbound()
96 def new_request(self, request):
97 request.setHeader('Content-Type','application/octet-stream')
98 reactor.callLater(self.max_request_time, self._req_cancel, request)
99 request.notifyFinish().addErrback(self._req_error, request)
100 self._rq.append(request)
101 self._check_outbound()
103 def _check_outbound(self):
104 log_debug(DBG.HTTP_CTRL, 'CHKO')
106 try: request = self._rq[0]
107 except IndexError: request = None
108 if request and request.finished:
109 self._log(DBG.HTTP_CTRL, 'CHKO req finished, discard', idof=request)
113 if not self._pq.nonempty():
114 # no packets, oh well
115 self._log(DBG.HTTP_CTRL, 'CHKO no packets, OUT-DONE', idof=request)
120 self._log(DBG.HTTP_CTRL, 'CHKO no request, OUT-DONE', idof=request)
123 self._log(DBG.HTTP_CTRL, 'CHKO processing', idof=request)
124 # request, and also some non-expired packets
125 self._pq.process((lambda: request.sentLength),
129 assert(request.sentLength)
132 self._log(DBG.HTTP, 'complete', idof=request)
133 # round again, looking for more to do
135 while len(self._rq) > self.target_requests_outstanding:
136 request = self._rq.popleft()
137 self._log(DBG.HTTP, 'CHKO above target, returning empty', idof=request)
140 def process_request(request, desca):
141 # find client, update config, etc.
142 metadata = request.args[b'm'][0]
143 metadata = metadata.split(b'\r\n')
144 (ci_s, pw, tro) = metadata[0:3]
145 desca['m[0,2]'] = [ci_s, tro]
146 ci_s = ci_s.decode('utf-8')
152 if pw != cl.pw: raise ValueError('bad password')
155 if tro != cl.target_requests_outstanding:
156 raise ValueError('tro must be %d' % cl.target_requests_outstanding)
159 d = request.args[b'd']
161 except KeyError: d = b''
163 cl.process_arriving_data(d)
164 cl.new_request(request)
166 def log_http(desca, msg):
172 log_debug(DBG.HTTP, msg + repr(desca), d=d)
174 class IphttpResource(twisted.web.resource.Resource):
176 def render_POST(self, request):
177 log_debug(DBG.HTTP_FULL,
178 'req recv: ' + repr(request) + ' ' + repr(request.args),
181 try: process_request(request, desca)
182 except Exception as e:
183 emsg = traceback.format_exc()
184 log_http(desca, 'EXCEPTION ' + emsg)
185 request.setHeader('Content-Type','text/plain; charset="utf-8"')
186 request.setResponseCode(400)
187 return (emsg + ' # ' + repr(desca) + '\r\n').encode('utf-8')
188 log_http(desca, '... [%s]' % id(request))
191 def render_GET(self, request):
192 log_debug(DBG.HTTP, 'GET request')
193 return b'<html><body>hippotat</body></html>'
196 resource = IphttpResource()
197 site = twisted.web.server.Site(resource)
199 ep = sa.make_endpoint()
200 crash_on_defer(ep.listen(site))
201 log_debug(DBG.INIT, 'listening on %s' % sa)
203 #---------- config and setup ----------
206 process_cfg_common_always()
208 process_cfg_network()
211 c.relay = cfg.get('virtual','relay')
212 except NoOptionError:
213 for search in c.network.hosts():
214 if search == c.server: continue
219 process_cfg_clients(Client)
221 process_cfg_ipif('server',
224 ('rnets','network')))
228 start_ipif(c.ipif_command, route)