3 import twisted
.web
.server
import Site
4 from twisted
.web
.resource
import Resource
5 from twisted
.web
.server
import NOT_DONE_YET
6 from twisted
.internet
import reactor
19 r
= ipaddress
.IPv4Address(input)
20 except AddressValueError
:
21 r
= ipaddress
.IPv6Address(input)
26 r
= ipaddress
.IPv4Network(input)
27 except NetworkValueError
:
28 r
= ipaddress
.IPv6Network(input)
33 max_batch_down = 65536
38 max_batch_down = 262144
40 max_request_time = 121
43 def route(packet
. daddr
):
44 try: client
= clients
[daddr
]
45 except KeyError: dclient
= None
46 if dclient
is not None:
47 dclient
.queue_outbound(packet
)
48 else if daddr
= server
or daddr
not in network
:
51 syslog
.syslog(syslog
.LOG_DEBUG
, 'no client for %s' % daddr
)
54 def __init__(self
, ip
, cs
):
55 # instance data members
58 self
.pw
= cfg
.get(cs
, 'password')
59 self
._rq
= collections
.deque() # requests
60 self
._pq
= collections
.deque() # packets
65 for k
in ('max_batch_down','max_queue_time','max_request_time'):
66 req
= cfg
.getint(cs
, k
)
67 limit
= cfg
.getint('limits',k
)
68 self
.__dict__
[k
] = min(req
, limit
)
70 def process_arriving_data(self
, d
):
71 for packet
in slip_decode(d
):
72 (saddr
, daddr
) = ip_64_addrs(packet
)
74 raise ValueError('wrong source address %s' % saddr
)
77 def _req_cancel(self
, request
):
80 def _req_error(self
, err
, request
):
81 self
._req_cancel(request
)
83 def queue_outbound(self
, packet
):
84 self
._pq
.append((time
.monotonic(), packet
))
86 def http_request(self
, request
):
87 request
.setHeader('Content-Type','application/octet-stream')
88 reactor
.callLater(self
.max_request_time
, self
._req_cancel
, request
)
89 request
.notifyFinish().addErrback(self
._req_error
, request
)
90 self
._rq
.append(request
)
91 self
._check_outbound()
93 def _check_outbound(self
):
95 try: request
= self
._rq
[0]
96 except IndexError: request
= None
97 if request
and request
.finished
:
101 # now request is an unfinished request, or None
102 try: (queuetime
, packet
) = self
._pq
[0]
104 # no packets, oh well
107 age
= time
.monotonic() - queuetime
108 if age
> self
.max_queue_time
:
116 # request, and also some non-expired packets
118 try: (dummy
, packet
) = self
._pq
[0]
119 except IndexError: break
121 encoded
= slip_encode(packet
)
123 if request
.sentLength
> 0:
124 if (request
.sentLength
+ len(slip_delimiter
)
125 + len(encoded
) > self
.max_batch_down
):
127 request
.write(slip_delimiter
)
129 request
.write(encoded
)
132 assert(request
.sentLength
)
135 # round again, looking for more to do
141 network
= ipnetwork(cfg
.get('virtual','network'))
143 ourself
= cfg
.get('virtual','server')
144 except ConfigParser
.NoOptionError
:
145 ourself
= network
.hosts().next()
147 for cs
in cfg
.sections():
148 if not (':' in cs
or '.' in cs
): continue
150 if ci
not in network
:
151 raise ValueError('client %s not in network' % ci
)
153 raise ValueError('multiple client cfg sections for %s' % ci
)
154 clients
[ci
] = Client(ci
, cs
)
156 class FormPage(Resource
):
157 def render_POST(self
, request
):
158 # find client, update config, etc.
159 ci
= ipaddress(request
.args
['i'])
161 pw
= request
.args
['pw']
162 if pw
!= c
.pw
: raise ValueError('bad password')
165 for r
, w
in (('mbd', 'max_batch_down'),
166 ('mqt', 'max_queue_time'),
167 ('mrt', 'max_request_time')):
168 try: v
= request
.args
[r
]
169 except KeyError: continue
173 try: d
= request
.args
['d']
174 except KeyError: d
= ''
176 c
.process_arriving_data(d
)
177 c
.new_request(request
)