hippotat

   1 #!/usr/bin/python3
   2 #
   3 # Hippotat - Asinine IP Over HTTP program
   4 # ./hippotat - client main program
   5 #
   6 # Copyright 2017 Ian Jackson
   7 #
   8 # GPLv3+
   9 #
  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.
  14 #
  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.
  19 #
  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/>.
  23
  24 #@ import sys; sys.path.append('@PYBUILD_INSTALL_DIR@')
  25 from hippotatlib import *
  26
  27 import twisted.web
  28 import twisted.web.client
  29
  30 import io
  31
  32 class GeneralResponseConsumer(twisted.internet.protocol.Protocol):
  33   def __init__(self, cl, req, desc):
  34     self._cl = cl
  35     self._req = req
  36     self._desc = desc
  37
  38   def _log(self, dflag, msg, **kwargs):
  39     self._cl.log(dflag, '%s: %s' % (self._desc, msg), idof=self._req, **kwargs)
  40
  41   def connectionMade(self):
  42     self._log(DBG.HTTP_CTRL, 'connectionMade')
  43
  44 class ResponseConsumer(GeneralResponseConsumer):
  45   def __init__(self, cl, req):
  46     super().__init__(cl, req, 'RC')
  47     ssddesc = '[%s] %s' % (id(req), self._desc)
  48     self._ssd = SlipStreamDecoder(ssddesc, partial(queue_inbound, cl.ipif))
  49     self._log(DBG.HTTP_CTRL, '__init__')
  50
  51   def dataReceived(self, data):
  52     self._log(DBG.HTTP, 'dataReceived', d=data)
  53     try:
  54       self._ssd.inputdata(data)
  55     except Exception as e:
  56       self._handleexception()
  57
  58   def connectionLost(self, reason):
  59     self._log(DBG.HTTP_CTRL, 'connectionLost ' + str(reason))
  60     if not reason.check(twisted.web.client.ResponseDone):
  61       self.latefailure()
  62       return
  63     try:
  64       self._log(DBG.HTTP, 'ResponseDone')
  65       self._ssd.flush()
  66       self._cl.req_fin(self._req)
  67     except Exception as e:
  68       self._handleexception()
  69     self._cl.report_running()
  70
  71   def _handleexception(self):
  72     self._latefailure(traceback.format_exc())
  73
  74   def _latefailure(self, reason):
  75     self._log(DBG.HTTP_CTRL, '_latefailure ' + str(reason))
  76     self._cl.req_err(self._req, reason)
  77
  78 class ErrorResponseConsumer(GeneralResponseConsumer):
  79   def __init__(self, cl, req, resp):
  80     super().__init__(cl, req, 'ERROR-RC')
  81     self._resp = resp
  82     self._m = b''
  83     try:
  84       self._phrase = resp.phrase.decode('utf-8')
  85     except Exception:
  86       self._phrase = repr(resp.phrase)
  87     self._log(DBG.HTTP_CTRL, '__init__ %d %s' % (resp.code, self._phrase))
  88
  89   def dataReceived(self, data):
  90     self._log(DBG.HTTP_CTRL, 'dataReceived ' + repr(data))
  91     self._m += data
  92
  93   def connectionLost(self, reason):
  94     try:
  95       mbody = self._m.decode('utf-8')
  96     except Exception:
  97       mbody = repr(self._m)
  98     if not reason.check(twisted.web.client.ResponseDone):
  99       mbody += ' || ' + str(reason)
 100     self._cl.req_err(self._req,
 101             "FAILED %d %s | %s"
 102             % (self._resp.code, self._phrase, mbody))
 103
 104 class Client():
 105   def __init__(cl, c,ss,cs):
 106     cl.c = c
 107     cl.outstanding = { }
 108     cl.desc = '[%s %s] ' % (ss,cs)
 109     cl.running_reported = False
 110     cl.log_info('setting up')
 111
 112   def log_info(cl, msg):
 113     log.info(cl.desc + msg, dflag=False)
 114
 115   def report_running(cl):
 116     if not cl.running_reported:
 117       cl.log_info('running OK')
 118       cl.running_reported = True
 119
 120   def log(cl, dflag, msg, **kwargs):
 121     log_debug(dflag, cl.desc + msg, **kwargs)
 122
 123   def log_outstanding(cl):
 124     cl.log(DBG.CTRL_DUMP, 'OS %s' % cl.outstanding)
 125
 126   def start(cl):
 127     cl.queue = PacketQueue('up', cl.c.max_queue_time)
 128     cl.agent = twisted.web.client.Agent(
 129       reactor, connectTimeout = cl.c.http_timeout)
 130
 131   def outbound(cl, packet, saddr, daddr):
 132     #print('OUT ', saddr, daddr, repr(packet))
 133     cl.queue.append(packet)
 134     cl.check_outbound()
 135
 136   def req_ok(cl, req, resp):
 137     cl.log(DBG.HTTP_CTRL,
 138             'req_ok %d %s %s' % (resp.code, repr(resp.phrase), str(resp)),
 139             idof=req)
 140     if resp.code == 200:
 141       rc = ResponseConsumer(cl, req)
 142     else:
 143       rc = ErrorResponseConsumer(cl, req, resp)
 144
 145     resp.deliverBody(rc)
 146     # now rc is responsible for calling req_fin
 147
 148   def req_err(cl, req, err):
 149     # called when the Deferred fails, or (if it completes),
 150     # later, by ResponsConsumer or ErrorResponsConsumer
 151     try:
 152       cl.log(DBG.HTTP_CTRL, 'req_err ' + str(err), idof=req)
 153       if isinstance(err, twisted.python.failure.Failure):
 154         err = err.getTraceback()
 155       print('%s[%#x] %s' % (cl.desc, id(req), err.strip('\n').replace('\n',' / ')),
 156             file=sys.stderr)
 157       if not isinstance(cl.outstanding[req], int):
 158         raise RuntimeError('[%#x] previously %s' %
 159                            (id(req), cl.outstanding[req]))
 160       cl.outstanding[req] = err
 161       cl.log_outstanding()
 162       reactor.callLater(cl.c.http_retry, partial(cl.req_fin, req))
 163     except Exception as e:
 164       crash(traceback.format_exc() + '\n----- handling -----\n' + err)
 165
 166   def req_fin(cl, req):
 167     del cl.outstanding[req]
 168     cl.log(DBG.HTTP_CTRL, 'req_fin OS=%d' % len(cl.outstanding), idof=req)
 169     cl.check_outbound()
 170
 171   def check_outbound(cl):
 172     while True:
 173       if len(cl.outstanding) >= cl.c.max_outstanding:
 174         break
 175
 176       if (not cl.queue.nonempty() and
 177           len(cl.outstanding) >= cl.c.target_requests_outstanding):
 178         break
 179
 180       d = b''
 181       def moredata(s): nonlocal d; d += s
 182       cl.queue.process((lambda: len(d)),
 183                     moredata,
 184                     cl.c.max_batch_up)
 185
 186       d = mime_translate(d)
 187
 188       crlf = b'\r\n'
 189       lf   =   b'\n'
 190       mime = (b'--b'                                        + crlf +
 191               b'Content-Type: text/plain; charset="utf-8"'  + crlf +
 192               b'Content-Disposition: form-data; name="m"'   + crlf + crlf +
 193               str(cl.c.client)            .encode('ascii')  + crlf +
 194               cl.c.password                                 + crlf +
 195               str(cl.c.target_requests_outstanding)
 196                                           .encode('ascii')  + crlf +
 197               str(cl.c.http_timeout)      .encode('ascii')  + crlf +
 198             ((
 199               b'--b'                                        + crlf +
 200               b'Content-Type: application/octet-stream'     + crlf +
 201               b'Content-Disposition: form-data; name="d"'   + crlf + crlf +
 202               d                                             + crlf
 203              ) if len(d) else b'')                               +
 204               b'--b--'                                      + crlf)
 205
 206       #df = open('data.dump.dbg', mode='wb')
 207       #df.write(mime)
 208       #df.close()
 209       # POST -use -c 'multipart/form-data; boundary="b"' http://localhost:8099/ <data.dump.dbg
 210
 211       cl.log(DBG.HTTP_FULL, 'requesting: ' + str(mime))
 212
 213       hh = { 'User-Agent': ['hippotat'],
 214              'Content-Type': ['multipart/form-data; boundary="b"'],
 215              'Content-Length': [str(len(mime))] }
 216
 217       bytesreader = io.BytesIO(mime)
 218       producer = twisted.web.client.FileBodyProducer(bytesreader)
 219
 220       req = cl.agent.request(b'POST',
 221                           cl.c.url,
 222                           twisted.web.client.Headers(hh),
 223                           producer)
 224
 225       cl.outstanding[req] = len(d)
 226       cl.log(DBG.HTTP_CTRL,
 227              'request OS=%d' % len(cl.outstanding),
 228              idof=req, d=d)
 229       req.addTimeout(cl.c.http_timeout, reactor)
 230       req.addCallback(partial(cl.req_ok, req))
 231       req.addErrback(partial(cl.req_err, req))
 232
 233     cl.log_outstanding()
 234
 235 clients = [ ]
 236
 237 def process_cfg(_opts, putative_servers, putative_clients):
 238   global clients
 239
 240   for ss in putative_servers.values():
 241     for (ci,cs) in putative_clients.items():
 242       c = ConfigResults()
 243
 244       sections = cfg_process_client_common(c,ss,cs,ci)
 245       if not sections: continue
 246
 247       log_debug_config('processing client [%s %s]' % (ss, cs))
 248
 249       def srch(getter,key): return cfg_search(getter,key,sections)
 250
 251       c.http_timeout   += srch(cfg.getint, 'http_timeout_grace')
 252       c.max_outstanding = srch(cfg.getint, 'max_requests_outstanding')
 253       c.max_batch_up    = srch(cfg.getint, 'max_batch_up')
 254       c.http_retry      = srch(cfg.getint, 'http_retry')
 255       c.max_queue_time  = srch(cfg.getint, 'max_queue_time')
 256       c.vroutes         = srch(cfg.get,    'vroutes')
 257
 258       try: c.ifname     = srch(cfg_get_raw, 'ifname_client')
 259       except NoOptionError: pass
 260
 261       try: c.url = srch(cfg.get,'url')
 262       except NoOptionError:
 263         cfg_process_saddrs(c, ss)
 264         c.url = c.saddrs[0].url()
 265
 266       c.client = ci
 267
 268       cfg_process_vaddr(c,ss)
 269
 270       cfg_process_ipif(c,
 271                        sections,
 272                        (('local','client'),
 273                         ('peer', 'vaddr'),
 274                         ('rnets','vroutes')))
 275
 276       clients.append(Client(c,ss,cs))
 277
 278 common_startup(process_cfg)
 279
 280 for cl in clients:
 281   cl.start()
 282   cl.ipif = start_ipif(cl.c.ipif_command, cl.outbound)
 283   cl.check_outbound()
 284
 285 common_run()