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3fba9787 IJ |
1 | #!/usr/bin/python2 |
2 | ||
3 | from 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 | |
7 | ||
8 | import ConfigParser | |
ec88b1f1 | 9 | import ipaddress |
3fba9787 | 10 | |
c4b6d990 IJ |
11 | import syslog |
12 | ||
3fba9787 IJ |
13 | clients = { } |
14 | ||
15 | def ipaddress(input): | |
16 | try: | |
ec88b1f1 | 17 | r = ipaddress.IPv4Address(input) |
3fba9787 | 18 | except AddressValueError: |
ec88b1f1 | 19 | r = ipaddress.IPv6Address(input) |
3fba9787 IJ |
20 | return r |
21 | ||
22 | def ipnetwork(input): | |
23 | try: | |
ec88b1f1 | 24 | r = ipaddress.IPv4Network(input) |
3fba9787 | 25 | except NetworkValueError: |
ec88b1f1 | 26 | r = ipaddress.IPv6Network(input) |
3fba9787 IJ |
27 | return r |
28 | ||
ec88b1f1 IJ |
29 | defcfg = u''' |
30 | [default] | |
31 | max_batch_down: 65536 | |
32 | max_queue_time: 10 | |
33 | max_request_time: 54 | |
34 | ||
35 | [global] | |
36 | max_batch_down: 262144 | |
37 | max_queue_time: 121 | |
38 | max_request_time: 121 | |
39 | ''' | |
40 | ||
c4b6d990 IJ |
41 | def route(packet. daddr): |
42 | try: client = clients[daddr] | |
43 | except KeyError: dclient = None | |
44 | if dclient is not None: | |
45 | dclient.queue_outbound_data(packet) | |
46 | else if daddr = server or daddr not in network: | |
47 | queue_inbound_data(packet) | |
48 | else: | |
49 | syslog.syslog(syslog.LOG_DEBUG, 'no client for %s' % daddr) | |
50 | ||
ec88b1f1 | 51 | class Client(): |
c4b6d990 | 52 | def __init__(self, ip, cs): |
ec88b1f1 IJ |
53 | # instance data members |
54 | self._ip = ip | |
55 | self._cs = cs | |
56 | self.pw = cfg.get(cs, 'password') | |
c4b6d990 IJ |
57 | # plus from config: |
58 | # .max_batch_down | |
59 | # .max_queue_time | |
60 | # .max_request_time | |
ec88b1f1 IJ |
61 | for k in ('max_batch_down','max_queue_time','max_request_time'): |
62 | req = cfg.getint(cs, k) | |
63 | limit = cfg.getint('global',k) | |
c4b6d990 IJ |
64 | self.__dict__[k] = min(req, limit) |
65 | ||
66 | def process_arriving_data(self, d): | |
67 | for packet in slip_decode(d): | |
68 | (saddr, daddr) = ip_64_addrs(packet) | |
69 | if saddr != self._ip: | |
70 | raise ValueError('wrong source address %s' % saddr) | |
71 | route(packet, daddr) | |
ec88b1f1 | 72 | |
c4b6d990 IJ |
73 | def _req_cancel(self, request): |
74 | request.finish() | |
75 | ||
76 | def _req_error(self, err, request): | |
77 | self._req_cancel(request) | |
78 | ||
79 | def http_request(self, request): | |
80 | request.setHeader('Content-Type','application/octet-stream') | |
81 | reactor.callLater(self.max_request_time, self._req_cancel, request) | |
82 | request.notifyFinish().addErrback(self._req_error, request) | |
ec88b1f1 | 83 | |
3fba9787 IJ |
84 | def process_cfg(): |
85 | global network | |
86 | global ourself | |
87 | ||
ec88b1f1 | 88 | network = ipnetwork(cfg.get('virtual','network')) |
3fba9787 IJ |
89 | try: |
90 | ourself = cfg.get('virtual','server') | |
91 | except ConfigParser.NoOptionError: | |
92 | ourself = network.hosts().next() | |
93 | ||
ec88b1f1 IJ |
94 | for cs in cfg.sections(): |
95 | if not (':' in cs or '.' in cs): continue | |
96 | ci = ipaddress(cs) | |
97 | if ci not in network: | |
98 | raise ValueError('client %s not in network' % ci) | |
99 | if ci in clients: | |
100 | raise ValueError('multiple client cfg sections for %s' % ci) | |
101 | clients[ci] = Client(ci, cs) | |
3fba9787 IJ |
102 | |
103 | class FormPage(Resource): | |
104 | def render_POST(self, request): | |
ec88b1f1 IJ |
105 | # find client, update config, etc. |
106 | ci = ipaddress(request.args['i']) | |
107 | c = clients[ci] | |
108 | pw = request.args['pw'] | |
109 | if pw != c.pw: raise ValueError('bad password') | |
110 | ||
111 | # update config | |
112 | for r, w in (('mbd', 'max_batch_down'), | |
113 | ('mqt', 'max_queue_time'), | |
114 | ('mrt', 'max_request_time')): | |
115 | try: v = request.args[r] | |
116 | except KeyError: continue | |
117 | v = int(v) | |
c4b6d990 | 118 | c.__dict__[w] = v |
ec88b1f1 IJ |
119 | |
120 | try: d = request.args['d'] | |
121 | except KeyError: d = '' | |
122 | ||
123 | c.process_arriving_data(d) | |
c4b6d990 | 124 | c.new_request(request) |