Commit | Line | Data |
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094ee3a2 | 1 | #!/usr/bin/python3 |
3fba9787 | 2 | |
37ab4cdc | 3 | from hippotat import * |
aa663282 | 4 | |
e2d41dc1 IJ |
5 | import sys |
6 | import os | |
7 | ||
e2d41dc1 IJ |
8 | import twisted.internet |
9 | import twisted.internet.endpoints | |
e2d41dc1 | 10 | from twisted.web.server import NOT_DONE_YET |
e2d41dc1 | 11 | |
5da7763e IJ |
12 | #import twisted.web.server import Site |
13 | #from twisted.web.resource import Resource | |
3fba9787 | 14 | |
c4b6d990 IJ |
15 | import syslog |
16 | ||
b0cfbfce | 17 | clients = { } |
3fba9787 | 18 | |
e75e9c17 | 19 | defcfg = ''' |
094ee3a2 IJ |
20 | [DEFAULT] |
21 | max_batch_down = 65536 | |
22 | max_queue_time = 10 | |
23 | max_request_time = 54 | |
650a3251 | 24 | target_requests_outstanding = 3 |
094ee3a2 | 25 | |
e75e9c17 IJ |
26 | [virtual] |
27 | mtu = 1500 | |
28 | # network | |
29 | # [host] | |
30 | # [relay] | |
31 | ||
32 | [server] | |
e2d41dc1 | 33 | ipif = userv root ipif %(host)s,%(relay)s,%(mtu)s,slip %(network)s |
5da7763e | 34 | addrs = 127.0.0.1 ::1 |
aa663282 | 35 | port = 8099 |
e75e9c17 | 36 | |
094ee3a2 IJ |
37 | [limits] |
38 | max_batch_down = 262144 | |
39 | max_queue_time = 121 | |
40 | max_request_time = 121 | |
650a3251 | 41 | target_requests_outstanding = 10 |
ec88b1f1 IJ |
42 | ''' |
43 | ||
5da7763e IJ |
44 | #---------- "router" ---------- |
45 | ||
ec0c4d95 IJ |
46 | def route(packet, saddr, daddr): |
47 | print('TRACE ', saddr, daddr, packet) | |
5da7763e IJ |
48 | try: client = clients[daddr] |
49 | except KeyError: dclient = None | |
50 | if dclient is not None: | |
51 | dclient.queue_outbound(packet) | |
3a6076b4 | 52 | elif saddr.is_link_local or daddr.is_link_local: |
ec0c4d95 | 53 | log_discard(packet, saddr, daddr, 'link-local') |
e2d41dc1 | 54 | elif daddr == host or daddr not in network: |
ec0c4d95 | 55 | print('TRACE INBOUND ', saddr, daddr, packet) |
5da7763e | 56 | queue_inbound(packet) |
e2d41dc1 | 57 | elif daddr == relay: |
5da7763e IJ |
58 | log_discard(packet, saddr, daddr, 'relay') |
59 | else: | |
60 | log_discard(packet, saddr, daddr, 'no client') | |
61 | ||
62 | def log_discard(packet, saddr, daddr, why): | |
3a6076b4 | 63 | print('DROP ', saddr, daddr, why) |
ec0c4d95 IJ |
64 | # syslog.syslog(syslog.LOG_DEBUG, |
65 | # 'discarded packet %s -> %s (%s)' % (saddr, daddr, why)) | |
5da7763e | 66 | |
5da7763e | 67 | #---------- client ---------- |
c4b6d990 | 68 | |
ec88b1f1 | 69 | class Client(): |
c4b6d990 | 70 | def __init__(self, ip, cs): |
ec88b1f1 IJ |
71 | # instance data members |
72 | self._ip = ip | |
73 | self._cs = cs | |
74 | self.pw = cfg.get(cs, 'password') | |
0ac316c8 | 75 | self._rq = collections.deque() # requests |
650a3251 | 76 | # self._pq = PacketQueue(...) |
c4b6d990 IJ |
77 | # plus from config: |
78 | # .max_batch_down | |
79 | # .max_queue_time | |
80 | # .max_request_time | |
650a3251 IJ |
81 | # .target_requests_outstanding |
82 | for k in ('max_batch_down','max_queue_time','max_request_time', | |
83 | 'target_requests_outstanding'): | |
ec88b1f1 | 84 | req = cfg.getint(cs, k) |
094ee3a2 | 85 | limit = cfg.getint('limits',k) |
c4b6d990 | 86 | self.__dict__[k] = min(req, limit) |
650a3251 | 87 | self._pq = PacketQueue(self.max_queue_time) |
c4b6d990 IJ |
88 | |
89 | def process_arriving_data(self, d): | |
b0cfbfce | 90 | for packet in slip.decode(d): |
5bae5ba3 | 91 | (saddr, daddr) = packet_addrs(packet) |
c4b6d990 IJ |
92 | if saddr != self._ip: |
93 | raise ValueError('wrong source address %s' % saddr) | |
ec0c4d95 | 94 | route(packet, saddr, daddr) |
ec88b1f1 | 95 | |
c4b6d990 IJ |
96 | def _req_cancel(self, request): |
97 | request.finish() | |
98 | ||
99 | def _req_error(self, err, request): | |
100 | self._req_cancel(request) | |
101 | ||
0ac316c8 | 102 | def queue_outbound(self, packet): |
650a3251 | 103 | self._pq.append(packet) |
0ac316c8 | 104 | |
c4b6d990 IJ |
105 | def http_request(self, request): |
106 | request.setHeader('Content-Type','application/octet-stream') | |
107 | reactor.callLater(self.max_request_time, self._req_cancel, request) | |
108 | request.notifyFinish().addErrback(self._req_error, request) | |
0ac316c8 IJ |
109 | self._rq.append(request) |
110 | self._check_outbound() | |
111 | ||
112 | def _check_outbound(self): | |
113 | while True: | |
114 | try: request = self._rq[0] | |
115 | except IndexError: request = None | |
116 | if request and request.finished: | |
117 | self._rq.popleft() | |
118 | continue | |
119 | ||
650a3251 | 120 | if not self._pq.nonempty(): |
0ac316c8 IJ |
121 | # no packets, oh well |
122 | continue | |
123 | ||
094ee3a2 IJ |
124 | if request is None: |
125 | # no request | |
126 | break | |
127 | ||
128 | # request, and also some non-expired packets | |
129 | while True: | |
650a3251 IJ |
130 | packet = self.pq.popleft() |
131 | if packet is None: break | |
094ee3a2 | 132 | |
b0cfbfce | 133 | encoded = slip.encode(packet) |
094ee3a2 IJ |
134 | |
135 | if request.sentLength > 0: | |
b0cfbfce | 136 | if (request.sentLength + len(slip.delimiter) |
094ee3a2 IJ |
137 | + len(encoded) > self.max_batch_down): |
138 | break | |
b0cfbfce | 139 | request.write(slip.delimiter) |
094ee3a2 IJ |
140 | |
141 | request.write(encoded) | |
142 | self._pq.popLeft() | |
143 | ||
144 | assert(request.sentLength) | |
145 | self._rq.popLeft() | |
146 | request.finish() | |
147 | # round again, looking for more to do | |
ec88b1f1 | 148 | |
650a3251 IJ |
149 | while len(self._rq) > self.target_requests_outstanding: |
150 | request = self._rq.popleft() | |
151 | request.finish() | |
152 | ||
5da7763e | 153 | class IphttpResource(twisted.web.resource.Resource): |
c1e4910b | 154 | isLeaf = True |
5da7763e IJ |
155 | def render_POST(self, request): |
156 | # find client, update config, etc. | |
e2d41dc1 | 157 | ci = ipaddr(request.args['i']) |
5da7763e IJ |
158 | c = clients[ci] |
159 | pw = request.args['pw'] | |
160 | if pw != c.pw: raise ValueError('bad password') | |
161 | ||
162 | # update config | |
163 | for r, w in (('mbd', 'max_batch_down'), | |
164 | ('mqt', 'max_queue_time'), | |
650a3251 IJ |
165 | ('mrt', 'max_request_time'), |
166 | ('tro', 'target_requests_outstanding')): | |
5da7763e IJ |
167 | try: v = request.args[r] |
168 | except KeyError: continue | |
169 | v = int(v) | |
170 | c.__dict__[w] = v | |
171 | ||
172 | try: d = request.args['d'] | |
173 | except KeyError: d = '' | |
174 | ||
175 | c.process_arriving_data(d) | |
176 | c.new_request(request) | |
177 | ||
8e279651 | 178 | def render_GET(self, request): |
040ff511 | 179 | return b'<html><body>hippotat</body></html>' |
8e279651 | 180 | |
5da7763e IJ |
181 | def start_http(): |
182 | resource = IphttpResource() | |
b11c6e7a | 183 | site = twisted.web.server.Site(resource) |
e2d41dc1 | 184 | for addrspec in cfg.get('server','addrs').split(): |
5da7763e IJ |
185 | try: |
186 | addr = ipaddress.IPv4Address(addrspec) | |
187 | endpointfactory = twisted.internet.endpoints.TCP4ServerEndpoint | |
188 | except AddressValueError: | |
189 | addr = ipaddress.IPv6Address(addrspec) | |
190 | endpointfactory = twisted.internet.endpoints.TCP6ServerEndpoint | |
191 | ep = endpointfactory(reactor, cfg.getint('server','port'), addr) | |
b11c6e7a | 192 | crash_on_defer(ep.listen(site)) |
5da7763e IJ |
193 | |
194 | #---------- config and setup ---------- | |
195 | ||
3fba9787 IJ |
196 | def process_cfg(): |
197 | global network | |
e75e9c17 IJ |
198 | global host |
199 | global relay | |
5bae5ba3 | 200 | global ipif_command |
3fba9787 | 201 | |
ec88b1f1 | 202 | network = ipnetwork(cfg.get('virtual','network')) |
e75e9c17 IJ |
203 | if network.num_addresses < 3 + 2: |
204 | raise ValueError('network needs at least 2^3 addresses') | |
205 | ||
3fba9787 | 206 | try: |
e75e9c17 IJ |
207 | host = cfg.get('virtual','host') |
208 | except NoOptionError: | |
e2d41dc1 | 209 | host = next(network.hosts()) |
e75e9c17 IJ |
210 | |
211 | try: | |
212 | relay = cfg.get('virtual','relay') | |
e2d41dc1 | 213 | except NoOptionError: |
e75e9c17 | 214 | for search in network.hosts(): |
e2d41dc1 | 215 | if search == host: continue |
e75e9c17 IJ |
216 | relay = search |
217 | break | |
3fba9787 | 218 | |
ec88b1f1 IJ |
219 | for cs in cfg.sections(): |
220 | if not (':' in cs or '.' in cs): continue | |
e2d41dc1 | 221 | ci = ipaddr(cs) |
ec88b1f1 IJ |
222 | if ci not in network: |
223 | raise ValueError('client %s not in network' % ci) | |
224 | if ci in clients: | |
225 | raise ValueError('multiple client cfg sections for %s' % ci) | |
226 | clients[ci] = Client(ci, cs) | |
3fba9787 | 227 | |
e2d41dc1 IJ |
228 | global mtu |
229 | mtu = cfg.get('virtual','mtu') | |
230 | ||
5bae5ba3 IJ |
231 | iic_vars = { } |
232 | for k in ('host','relay','mtu','network'): | |
233 | iic_vars[k] = globals()[k] | |
234 | ||
235 | ipif_command = cfg.get('server','ipif', vars=iic_vars) | |
236 | ||
e75e9c17 | 237 | def startup(): |
ae7c7784 | 238 | common_startup(defcfg) |
5bae5ba3 | 239 | process_cfg() |
040ff511 | 240 | start_ipif(ipif_command, route) |
5bae5ba3 | 241 | start_http() |
e2d41dc1 IJ |
242 | |
243 | startup() | |
ae7c7784 | 244 | common_run() |