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 (enc'd)", 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'][0]
161 desca
['dlen'] = len(d
)
166 log_http(desca
, 'processing', idof
=id(request
), d
=d
)
168 d
= mime_translate(d
)
170 cl
.process_arriving_data(d
)
171 cl
.new_request(request
)
173 def log_http(desca
, msg
, **kwargs
):
175 kwargs
['d'] = desca
['d']
179 log_debug(DBG
.HTTP
, msg
+ repr(desca
), **kwargs
)
181 class IphttpResource(twisted
.web
.resource
.Resource
):
183 def render_POST(self
, request
):
184 log_debug(DBG
.HTTP_FULL
,
185 'req recv: ' + repr(request
) + ' ' + repr(request
.args
),
188 try: process_request(request
, desca
)
189 except Exception as e
:
190 emsg
= traceback
.format_exc()
191 log_http(desca
, 'RETURNING EXCEPTION ' + emsg
)
192 request
.setHeader('Content-Type','text/plain; charset="utf-8"')
193 request
.setResponseCode(400)
194 return (emsg
+ ' # ' + repr(desca
) + '\r\n').encode('utf-8')
195 log_debug(DBG
.HTTP_CTRL
, '...', idof
=id(request
))
198 def render_GET(self
, request
):
199 log_debug(DBG
.HTTP
, 'GET request')
200 return b
'<html><body>hippotat</body></html>'
203 resource
= IphttpResource()
204 site
= twisted
.web
.server
.Site(resource
)
206 ep
= sa
.make_endpoint()
207 crash_on_defer(ep
.listen(site
))
208 log_debug(DBG
.INIT
, 'listening on %s' % sa
)
210 #---------- config and setup ----------
213 process_cfg_common_always()
215 process_cfg_network()
218 c
.relay
= cfg
.get('virtual','relay')
219 except NoOptionError
:
220 for search
in c
.network
.hosts():
221 if search
== c
.server
: continue
226 process_cfg_clients(Client
)
228 process_cfg_ipif('server',
231 ('rnets','network')))
235 start_ipif(c
.ipif_command
, (lambda p
,s
,d
: route(p
,"[ipif]",s
,d
)))