3 # Hippotat - Asinine IP Over HTTP program
4 # ./hippotat - client main program
6 # Copyright 2017 Ian Jackson
10 # This program is free software: you can redistribute it and/or modify
11 # it under the terms of the GNU General Public License as published by
12 # the Free Software Foundation, either version 3 of the License, or
13 # (at your option) any later version.
15 # This program is distributed in the hope that it will be useful,
16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 # GNU General Public License for more details.
20 # You should have received a copy of the GNU General Public License
21 # along with this program, in the file GPLv3. If not,
22 # see <http://www.gnu.org/licenses/>.
24 #@ import sys; sys.path.append('@PYBUILD_INSTALL_DIR@')
25 from hippotatlib import *
28 import twisted.web.client
33 class GeneralResponseConsumer(twisted.internet.protocol.Protocol):
34 def __init__(self, cl, req, resp, desc):
40 def _log(self, dflag, msg, **kwargs):
41 self._cl.log(dflag, '%s: %s' % (self._desc, msg), idof=self._req, **kwargs)
43 def connectionMade(self):
44 self._log(DBG.HTTP_CTRL, 'connectionMade')
46 def connectionLostOK(self, reason):
47 return (reason.check(twisted.web.client.ResponseDone) or
48 reason.check(twisted.web.client.PotentialDataLoss))
49 # twisted.web.client.PotentialDataLoss is an entirely daft
50 # exception. It will occur every time if the origin server does
51 # not provide a Content-Length. (hippotatd does, of course, but
52 # the HTTP transaction might be proxied.)
54 class ResponseConsumer(GeneralResponseConsumer):
55 def __init__(self, cl, req, resp):
56 super().__init__(cl, req, resp, 'RC')
57 ssddesc = '[%s] %s' % (id(req), self._desc)
58 self._ssd = SlipStreamDecoder(ssddesc, partial(queue_inbound, cl.ipif),
60 self._log(DBG.HTTP_CTRL, '__init__')
62 def dataReceived(self, data):
63 self._log(DBG.HTTP, 'dataReceived', d=data)
65 self._ssd.inputdata(data)
66 except Exception as e:
67 self._handleexception()
69 def connectionLost(self, reason):
70 reason_msg = 'connectionLost ' + str(reason)
71 self._log(DBG.HTTP_CTRL, reason_msg)
72 if not self.connectionLostOK(reason):
73 self._latefailure(reason_msg)
76 self._log(DBG.HTTP, 'ResponseDone')
78 self._cl.req_fin(self._req)
79 except Exception as e:
80 self._handleexception()
81 self._cl.report_running()
83 def _handleexception(self):
84 self._latefailure(traceback.format_exc())
86 def _latefailure(self, reason):
87 self._log(DBG.HTTP_CTRL, '_latefailure ' + str(reason))
88 self._cl.req_err(self._req, reason)
90 class ErrorResponseConsumer(GeneralResponseConsumer):
91 def __init__(self, cl, req, resp):
92 super().__init__(cl, req, resp, 'ERROR-RC')
95 self._phrase = resp.phrase.decode('utf-8')
97 self._phrase = repr(resp.phrase)
98 self._log(DBG.HTTP_CTRL, '__init__ %d %s' % (resp.code, self._phrase))
100 def dataReceived(self, data):
101 self._log(DBG.HTTP_CTRL, 'dataReceived ' + repr(data))
104 def connectionLost(self, reason):
106 mbody = self._m.decode('utf-8')
108 mbody = repr(self._m)
109 if not self.connectionLostOK(reason):
110 mbody += ' || ' + str(reason)
111 self._cl.req_err(self._req,
113 % (self._resp.code, self._phrase, mbody))
116 def __init__(cl, c,ss,cs):
119 cl.desc = '[%s %s] ' % (ss,cs)
120 cl.running_reported = False
121 cl.log_info('setting up')
123 def log_info(cl, msg):
124 log.info(cl.desc + msg, dflag=False)
126 def report_running(cl):
127 if not cl.running_reported:
128 cl.log_info('running OK')
129 cl.running_reported = True
131 def log(cl, dflag, msg, **kwargs):
132 log_debug(dflag, cl.desc + msg, **kwargs)
134 def log_outstanding(cl):
135 cl.log(DBG.CTRL_DUMP, 'OS %s' % cl.outstanding)
138 cl.queue = PacketQueue('up', cl.c.max_queue_time)
139 cl.agent = twisted.web.client.Agent(
140 reactor, connectTimeout = cl.c.http_timeout)
142 def outbound(cl, packet, saddr, daddr):
143 #print('OUT ', saddr, daddr, repr(packet))
144 cl.queue.append(packet)
147 def req_ok(cl, req, resp):
148 cl.log(DBG.HTTP_CTRL,
149 'req_ok %d %s %s' % (resp.code, repr(resp.phrase), str(resp)),
152 rc = ResponseConsumer(cl, req, resp)
154 rc = ErrorResponseConsumer(cl, req, resp)
157 # now rc is responsible for calling req_fin
159 def req_err(cl, req, err):
160 # called when the Deferred fails, or (if it completes),
161 # later, by ResponsConsumer or ErrorResponsConsumer
163 cl.log(DBG.HTTP_CTRL, 'req_err ' + str(err), idof=req)
164 cl.running_reported = False
165 if isinstance(err, twisted.python.failure.Failure):
166 err = err.getTraceback()
167 print('%s[%#x] %s' % (cl.desc, id(req), err.strip('\n').replace('\n',' / ')),
169 if not isinstance(cl.outstanding[req], int):
170 raise RuntimeError('[%#x] previously %s' %
171 (id(req), cl.outstanding[req]))
172 cl.outstanding[req] = err
174 reactor.callLater(cl.c.http_retry, partial(cl.req_fin, req))
175 except Exception as e:
176 crash(traceback.format_exc() + '\n----- handling -----\n' + err)
178 def req_fin(cl, req):
179 del cl.outstanding[req]
180 cl.log(DBG.HTTP_CTRL, 'req_fin OS=%d' % len(cl.outstanding), idof=req)
183 def check_outbound(cl):
185 if len(cl.outstanding) >= cl.c.max_outstanding:
188 if (not cl.queue.nonempty() and
189 len(cl.outstanding) >= cl.c.target_requests_outstanding):
193 def moredata(s): nonlocal d; d += s
194 cl.queue.process((lambda: len(d)),
198 d = mime_translate(d)
200 token = authtoken_make(cl.c.secret)
204 mime = (b'--b' + crlf +
205 b'Content-Type: text/plain; charset="utf-8"' + crlf +
206 b'Content-Disposition: form-data; name="m"' + crlf + crlf +
207 str(cl.c.client) .encode('ascii') + crlf +
209 str(cl.c.target_requests_outstanding)
210 .encode('ascii') + crlf +
211 str(cl.c.http_timeout) .encode('ascii') + crlf +
214 b'Content-Type: application/octet-stream' + crlf +
215 b'Content-Disposition: form-data; name="d"' + crlf + crlf +
217 ) if len(d) else b'') +
220 #df = open('data.dump.dbg', mode='wb')
223 # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
225 cl.log(DBG.HTTP_FULL, 'requesting: ' + str(mime))
227 hh = { 'User-Agent': ['hippotat'],
228 'Content-Type': ['multipart/form-data; boundary="b"'] }
230 bytesreader = io.BytesIO(mime)
231 producer = twisted.web.client.FileBodyProducer(bytesreader)
233 req = cl.agent.request(b'POST',
235 twisted.web.client.Headers(hh),
238 cl.outstanding[req] = len(d)
239 cl.log(DBG.HTTP_CTRL,
240 'request OS=%d' % len(cl.outstanding),
242 req.addTimeout(cl.c.http_timeout, reactor)
243 req.addCallback(partial(cl.req_ok, req))
244 req.addErrback(partial(cl.req_err, req))
250 def encode_url(urlstr):
251 # Oh, this is a disaster. We're given a URL as a `str', but the underlying
252 # machinery insists on having `bytes'. Assume we've been given a sensible
253 # URL, with escaping in all of the necessary places, except that it may
254 # contain non-ASCII characters: then encode as UTF-8 and squash the top-
255 # bit-set bytes down to percent escapes.
257 # This conses like it's going out of fashion, but it gets the job done.
258 return b''.join(bytes([b]) if b < 128 else '%%%02X' % b
259 for b in urlstr.encode('utf-8'))
261 def process_cfg(_opts, putative_servers, putative_clients):
264 for ss in putative_servers.values():
265 for (ci,cs) in putative_clients.items():
268 sections = cfg_process_client_common(c,ss,cs,ci)
269 if not sections: continue
271 log_debug_config('processing client [%s %s]' % (ss, cs))
273 def srch(getter,key): return cfg_search(getter,key,sections)
275 c.http_timeout += srch(cfg.getint, 'http_timeout_grace')
276 c.max_outstanding = srch(cfg.getint, 'max_requests_outstanding')
277 c.max_batch_up = srch(cfg.getint, 'max_batch_up')
278 c.http_retry = srch(cfg.getint, 'http_retry')
279 c.max_queue_time = srch(cfg.getint, 'max_queue_time')
280 c.vroutes = srch(cfg.get, 'vroutes')
282 try: c.ifname = srch(cfg_get_raw, 'ifname_client')
283 except NoOptionError: pass
285 try: c.url = encode_url(srch(cfg.get,'url'))
286 except NoOptionError:
287 cfg_process_saddrs(c, ss)
288 c.url = c.saddrs[0].url()
292 cfg_process_vaddr(c,ss)
298 ('rnets','vroutes')))
300 clients.append(Client(c,ss,cs))
302 common_startup(process_cfg)
306 cl.ipif = start_ipif(cl.c.ipif_command, cl.outbound, cl.c.mtu)