5 import twisted
.web
.server
import Site
6 from twisted
.web
.resource
import Resource
7 from twisted
.web
.server
import NOT_DONE_YET
8 from twisted
.internet
import reactor
10 from optparse
import OptionParser
11 from configparser
import ConfigParser
12 from configparser
import NoOptionError
23 r
= ipaddress
.IPv4Address(input)
24 except AddressValueError
:
25 r
= ipaddress
.IPv6Address(input)
30 r
= ipaddress
.IPv4Network(input)
31 except NetworkValueError
:
32 r
= ipaddress
.IPv6Network(input)
37 max_batch_down = 65536
48 ipif = userv root ipif %(host),%(relay),%(mtu),slip %(network)
51 max_batch_down = 262144
53 max_request_time = 121
56 class IpifProcessProtocol(twisted
.internet
.protocol
.ProcessProtocol
):
59 def connectionMade(self
): pass
60 def outReceived(self
, data
):
62 packets
= slip_decode(buffer)
63 buffer = packets
.pop()
64 for packet
in packets
:
65 (saddr
, daddr
) = packet_addrs(packet
)
69 reactor
.spawnProcess(IpifProcessProtocol(),
70 '/bin/sh',['-c', ipif_command
],
71 childFDs
={0:'w', 1:'r', 2:2})
73 def log_discard(packet
, saddr
, daddr
, why
):
74 syslog
.syslog(syslog
.LOG_DEBUG
,
75 'discarded packet %s -> %s (%s)' %
(saddr
, daddr
, why
))
77 def route(packet
. daddr
):
78 try: client
= clients
[daddr
]
79 except KeyError: dclient
= None
80 if dclient
is not None:
81 dclient
.queue_outbound(packet
)
82 else if daddr
= host
or daddr
not in network
:
84 else if daddr
= relay
:
85 log_discard(packet
, saddr
, daddr
, 'relay')
87 log_discard(packet
, saddr
, daddr
, 'no client')
90 def __init__(self
, ip
, cs
):
91 # instance data members
94 self
.pw
= cfg
.get(cs
, 'password')
95 self
._rq
= collections
.deque() # requests
96 self
._pq
= collections
.deque() # packets
101 for k
in ('max_batch_down','max_queue_time','max_request_time'):
102 req
= cfg
.getint(cs
, k
)
103 limit
= cfg
.getint('limits',k
)
104 self
.__dict__
[k
] = min(req
, limit
)
106 def process_arriving_data(self
, d
):
107 for packet
in slip_decode(d
):
108 (saddr
, daddr
) = packet_addrs(packet
)
109 if saddr
!= self
._ip
:
110 raise ValueError('wrong source address %s' % saddr
)
113 def _req_cancel(self
, request
):
116 def _req_error(self
, err
, request
):
117 self
._req_cancel(request
)
119 def queue_outbound(self
, packet
):
120 self
._pq
.append((time
.monotonic(), packet
))
122 def http_request(self
, request
):
123 request
.setHeader('Content-Type','application/octet-stream')
124 reactor
.callLater(self
.max_request_time
, self
._req_cancel
, request
)
125 request
.notifyFinish().addErrback(self
._req_error
, request
)
126 self
._rq
.append(request
)
127 self
._check_outbound()
129 def _check_outbound(self
):
131 try: request
= self
._rq
[0]
132 except IndexError: request
= None
133 if request
and request
.finished
:
137 # now request is an unfinished request, or None
138 try: (queuetime
, packet
) = self
._pq
[0]
140 # no packets, oh well
143 age
= time
.monotonic() - queuetime
144 if age
> self
.max_queue_time
:
152 # request, and also some non-expired packets
154 try: (dummy
, packet
) = self
._pq
[0]
155 except IndexError: break
157 encoded
= slip_encode(packet
)
159 if request
.sentLength
> 0:
160 if (request
.sentLength
+ len(slip_delimiter
)
161 + len(encoded
) > self
.max_batch_down
):
163 request
.write(slip_delimiter
)
165 request
.write(encoded
)
168 assert(request
.sentLength
)
171 # round again, looking for more to do
179 network
= ipnetwork(cfg
.get('virtual','network'))
180 if network
.num_addresses
< 3 + 2:
181 raise ValueError('network needs at least 2^3 addresses')
184 host
= cfg
.get('virtual','host')
185 except NoOptionError
:
186 host
= network
.hosts().next()
189 relay
= cfg
.get('virtual','relay')
191 for search
in network
.hosts():
192 if search
= host
: continue
196 for cs
in cfg
.sections():
197 if not (':' in cs
or '.' in cs
): continue
199 if ci
not in network
:
200 raise ValueError('client %s not in network' % ci
)
202 raise ValueError('multiple client cfg sections for %s' % ci
)
203 clients
[ci
] = Client(ci
, cs
)
206 for k
in ('host','relay','mtu','network'):
207 iic_vars
[k
] = globals()[k
]
209 ipif_command
= cfg
.get('server','ipif', vars=iic_vars
)
211 class FormPage(Resource
):
212 def render_POST(self
, request
):
213 # find client, update config, etc.
214 ci
= ipaddress(request
.args
['i'])
216 pw
= request
.args
['pw']
217 if pw
!= c
.pw
: raise ValueError('bad password')
220 for r
, w
in (('mbd', 'max_batch_down'),
221 ('mqt', 'max_queue_time'),
222 ('mrt', 'max_request_time')):
223 try: v
= request
.args
[r
]
224 except KeyError: continue
228 try: d
= request
.args
['d']
229 except KeyError: d
= ''
231 c
.process_arriving_data(d
)
232 c
.new_request(request
)
236 op
.add_option('-c', '--config', dest
='configfile',
237 default
='/etc/hippottd/server.conf')
239 (opts
, args
) = op
.parse_args()
240 if len(args
): op
.error('no non-option arguments please')
243 cfg
.read_string(defcfg
)
244 cfg
.read_file(opts
['configfile'])