Commit | Line | Data |
---|---|---|
094ee3a2 | 1 | #!/usr/bin/python3 |
3fba9787 | 2 | |
37ab4cdc | 3 | from hippotat import * |
aa663282 | 4 | |
e2d41dc1 IJ |
5 | import sys |
6 | import os | |
7 | ||
e2d41dc1 | 8 | import twisted.internet |
e2d41dc1 | 9 | from twisted.web.server import NOT_DONE_YET |
e2d41dc1 | 10 | |
5da7763e IJ |
11 | #import twisted.web.server import Site |
12 | #from twisted.web.resource import Resource | |
3fba9787 | 13 | |
c4b6d990 IJ |
14 | import syslog |
15 | ||
b0cfbfce | 16 | clients = { } |
3fba9787 | 17 | |
e75e9c17 | 18 | defcfg = ''' |
094ee3a2 IJ |
19 | [DEFAULT] |
20 | max_batch_down = 65536 | |
21 | max_queue_time = 10 | |
22 | max_request_time = 54 | |
650a3251 | 23 | target_requests_outstanding = 3 |
2d2a54a4 | 24 | ipif = userv root ipif %(local)s,%(peer)s,%(mtu)s,slip %(rnets)s |
094ee3a2 | 25 | |
e75e9c17 IJ |
26 | [virtual] |
27 | mtu = 1500 | |
28 | # network | |
88487243 | 29 | # [server] |
e75e9c17 IJ |
30 | # [relay] |
31 | ||
32 | [server] | |
5da7763e | 33 | addrs = 127.0.0.1 ::1 |
aa663282 | 34 | port = 8099 |
e75e9c17 | 35 | |
094ee3a2 IJ |
36 | [limits] |
37 | max_batch_down = 262144 | |
38 | max_queue_time = 121 | |
39 | max_request_time = 121 | |
650a3251 | 40 | target_requests_outstanding = 10 |
ec88b1f1 IJ |
41 | ''' |
42 | ||
5da7763e IJ |
43 | #---------- "router" ---------- |
44 | ||
ec0c4d95 IJ |
45 | def route(packet, saddr, daddr): |
46 | print('TRACE ', saddr, daddr, packet) | |
5da7763e IJ |
47 | try: client = clients[daddr] |
48 | except KeyError: dclient = None | |
49 | if dclient is not None: | |
50 | dclient.queue_outbound(packet) | |
3a6076b4 | 51 | elif saddr.is_link_local or daddr.is_link_local: |
ec0c4d95 | 52 | log_discard(packet, saddr, daddr, 'link-local') |
88487243 | 53 | elif daddr == c.server or daddr not in c.network: |
ec0c4d95 | 54 | print('TRACE INBOUND ', saddr, daddr, packet) |
5da7763e | 55 | queue_inbound(packet) |
e2d41dc1 | 56 | elif daddr == relay: |
5da7763e IJ |
57 | log_discard(packet, saddr, daddr, 'relay') |
58 | else: | |
59 | log_discard(packet, saddr, daddr, 'no client') | |
60 | ||
61 | def log_discard(packet, saddr, daddr, why): | |
3a6076b4 | 62 | print('DROP ', saddr, daddr, why) |
ec0c4d95 IJ |
63 | # syslog.syslog(syslog.LOG_DEBUG, |
64 | # 'discarded packet %s -> %s (%s)' % (saddr, daddr, why)) | |
5da7763e | 65 | |
5da7763e | 66 | #---------- client ---------- |
c4b6d990 | 67 | |
ec88b1f1 | 68 | class Client(): |
88487243 | 69 | def __init__(self, ip, cs, pw): |
ec88b1f1 IJ |
70 | # instance data members |
71 | self._ip = ip | |
72 | self._cs = cs | |
88487243 | 73 | self.pw = pw |
0ac316c8 | 74 | self._rq = collections.deque() # requests |
650a3251 | 75 | # self._pq = PacketQueue(...) |
c4b6d990 IJ |
76 | # plus from config: |
77 | # .max_batch_down | |
78 | # .max_queue_time | |
79 | # .max_request_time | |
650a3251 | 80 | # .target_requests_outstanding |
88487243 IJ |
81 | |
82 | if ip not in c.network: | |
83 | raise ValueError('client %s not in network' % ip) | |
84 | ||
650a3251 IJ |
85 | for k in ('max_batch_down','max_queue_time','max_request_time', |
86 | 'target_requests_outstanding'): | |
ec88b1f1 | 87 | req = cfg.getint(cs, k) |
094ee3a2 | 88 | limit = cfg.getint('limits',k) |
c4b6d990 | 89 | self.__dict__[k] = min(req, limit) |
650a3251 | 90 | self._pq = PacketQueue(self.max_queue_time) |
c4b6d990 | 91 | |
88487243 IJ |
92 | if ip in clients: |
93 | raise ValueError('multiple client cfg sections for %s' % ip) | |
94 | clients[ip] = self | |
95 | ||
96 | def process_arriving_data(self, d): | |
97 | for packet in slip.decode(d): | |
98 | (saddr, daddr) = packet_addrs(packet) | |
99 | if saddr != self._ip: | |
100 | raise ValueError('wrong source address %s' % saddr) | |
101 | route(packet, saddr, daddr) | |
102 | ||
103 | def _req_cancel(self, request): | |
104 | request.finish() | |
105 | ||
106 | def _req_error(self, err, request): | |
107 | self._req_cancel(request) | |
108 | ||
109 | def queue_outbound(self, packet): | |
110 | self._pq.append(packet) | |
111 | ||
112 | def http_request(self, request): | |
113 | request.setHeader('Content-Type','application/octet-stream') | |
114 | reactor.callLater(self.max_request_time, self._req_cancel, request) | |
115 | request.notifyFinish().addErrback(self._req_error, request) | |
116 | self._rq.append(request) | |
117 | self._check_outbound() | |
118 | ||
119 | def _check_outbound(self): | |
120 | while True: | |
121 | try: request = self._rq[0] | |
122 | except IndexError: request = None | |
123 | if request and request.finished: | |
124 | self._rq.popleft() | |
125 | continue | |
126 | ||
127 | if not self._pq.nonempty(): | |
128 | # no packets, oh well | |
129 | continue | |
130 | ||
131 | if request is None: | |
132 | # no request | |
133 | break | |
134 | ||
135 | # request, and also some non-expired packets | |
136 | while True: | |
137 | packet = self.pq.popleft() | |
138 | if packet is None: break | |
c4b6d990 | 139 | |
88487243 IJ |
140 | encoded = slip.encode(packet) |
141 | ||
142 | if request.sentLength > 0: | |
143 | if (request.sentLength + len(slip.delimiter) | |
144 | + len(encoded) > self.max_batch_down): | |
145 | break | |
146 | request.write(slip.delimiter) | |
c4b6d990 | 147 | |
88487243 IJ |
148 | request.write(encoded) |
149 | self._pq.popLeft() | |
0ac316c8 | 150 | |
88487243 IJ |
151 | assert(request.sentLength) |
152 | self._rq.popLeft() | |
153 | request.finish() | |
154 | # round again, looking for more to do | |
0ac316c8 | 155 | |
88487243 IJ |
156 | while len(self._rq) > self.target_requests_outstanding: |
157 | request = self._rq.popleft() | |
158 | request.finish() | |
650a3251 | 159 | |
5da7763e | 160 | class IphttpResource(twisted.web.resource.Resource): |
c1e4910b | 161 | isLeaf = True |
5da7763e IJ |
162 | def render_POST(self, request): |
163 | # find client, update config, etc. | |
e2d41dc1 | 164 | ci = ipaddr(request.args['i']) |
5da7763e IJ |
165 | c = clients[ci] |
166 | pw = request.args['pw'] | |
167 | if pw != c.pw: raise ValueError('bad password') | |
168 | ||
169 | # update config | |
170 | for r, w in (('mbd', 'max_batch_down'), | |
171 | ('mqt', 'max_queue_time'), | |
650a3251 IJ |
172 | ('mrt', 'max_request_time'), |
173 | ('tro', 'target_requests_outstanding')): | |
5da7763e IJ |
174 | try: v = request.args[r] |
175 | except KeyError: continue | |
176 | v = int(v) | |
177 | c.__dict__[w] = v | |
178 | ||
179 | try: d = request.args['d'] | |
180 | except KeyError: d = '' | |
181 | ||
182 | c.process_arriving_data(d) | |
183 | c.new_request(request) | |
184 | ||
8e279651 | 185 | def render_GET(self, request): |
040ff511 | 186 | return b'<html><body>hippotat</body></html>' |
8e279651 | 187 | |
5da7763e IJ |
188 | def start_http(): |
189 | resource = IphttpResource() | |
b11c6e7a | 190 | site = twisted.web.server.Site(resource) |
88487243 IJ |
191 | for sa in c.saddrs: |
192 | ep = sa.make_endpoint() | |
b11c6e7a | 193 | crash_on_defer(ep.listen(site)) |
5da7763e IJ |
194 | |
195 | #---------- config and setup ---------- | |
196 | ||
3fba9787 | 197 | def process_cfg(): |
87a7c0c7 | 198 | process_cfg_common_always() |
88487243 IJ |
199 | process_cfg_server() |
200 | process_cfg_network() | |
e75e9c17 IJ |
201 | |
202 | try: | |
87a7c0c7 | 203 | c.relay = cfg.get('virtual','relay') |
e2d41dc1 | 204 | except NoOptionError: |
87a7c0c7 | 205 | for search in c.network.hosts(): |
88487243 | 206 | if search == c.server: continue |
87a7c0c7 | 207 | c.relay = search |
e75e9c17 | 208 | break |
3fba9787 | 209 | |
88487243 IJ |
210 | process_cfg_saddrs() |
211 | process_cfg_clients(Client) | |
212 | ||
213 | process_cfg_ipif('server', | |
214 | (('local','server'), | |
034284c3 | 215 | ('peer', 'relay'), |
88487243 | 216 | ('rnets','network'))) |
5bae5ba3 | 217 | |
87a7c0c7 IJ |
218 | common_startup(defcfg) |
219 | process_cfg() | |
220 | start_ipif(c.ipif_command, route) | |
221 | start_http() | |
ae7c7784 | 222 | common_run() |