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f478eff5 RG |
1 | #!/usr/bin/env python |
2 | ||
3 | import dns | |
4 | import socket | |
5 | import struct | |
6 | import sys | |
7 | import threading | |
8 | ||
9 | from dnsdisttests import DNSDistTest | |
10 | from proxyprotocol import ProxyProtocol | |
11 | ||
12 | # Python2/3 compatibility hacks | |
13 | try: | |
14 | from queue import Queue | |
15 | except ImportError: | |
16 | from Queue import Queue | |
17 | ||
18 | def ProxyProtocolUDPResponder(port, fromQueue, toQueue): | |
19 | sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) | |
20 | sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1) | |
21 | try: | |
22 | sock.bind(("127.0.0.1", port)) | |
23 | except socket.error as e: | |
24 | print("Error binding in the Proxy Protocol UDP responder: %s" % str(e)) | |
25 | sys.exit(1) | |
26 | ||
27 | while True: | |
28 | data, addr = sock.recvfrom(4096) | |
29 | ||
30 | proxy = ProxyProtocol() | |
31 | if len(data) < proxy.HEADER_SIZE: | |
32 | continue | |
33 | ||
34 | if not proxy.parseHeader(data): | |
35 | continue | |
36 | ||
37 | if proxy.local: | |
38 | # likely a healthcheck | |
39 | data = data[proxy.HEADER_SIZE:] | |
40 | request = dns.message.from_wire(data) | |
41 | response = dns.message.make_response(request) | |
42 | wire = response.to_wire() | |
43 | sock.settimeout(2.0) | |
44 | sock.sendto(wire, addr) | |
45 | sock.settimeout(None) | |
46 | ||
47 | continue | |
48 | ||
49 | payload = data[:(proxy.HEADER_SIZE + proxy.contentLen)] | |
50 | dnsData = data[(proxy.HEADER_SIZE + proxy.contentLen):] | |
51 | toQueue.put([payload, dnsData], True, 2.0) | |
52 | # computing the correct ID for the response | |
53 | request = dns.message.from_wire(dnsData) | |
54 | response = fromQueue.get(True, 2.0) | |
55 | response.id = request.id | |
56 | ||
57 | sock.settimeout(2.0) | |
58 | sock.sendto(response.to_wire(), addr) | |
59 | sock.settimeout(None) | |
60 | ||
61 | sock.close() | |
62 | ||
63 | def ProxyProtocolTCPResponder(port, fromQueue, toQueue): | |
64 | sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) | |
65 | sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1) | |
66 | sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1) | |
67 | try: | |
68 | sock.bind(("127.0.0.1", port)) | |
69 | except socket.error as e: | |
70 | print("Error binding in the TCP responder: %s" % str(e)) | |
71 | sys.exit(1) | |
72 | ||
73 | sock.listen(100) | |
74 | while True: | |
75 | (conn, _) = sock.accept() | |
76 | conn.settimeout(5.0) | |
77 | # try to read the entire Proxy Protocol header | |
78 | proxy = ProxyProtocol() | |
79 | header = conn.recv(proxy.HEADER_SIZE) | |
80 | if not header: | |
81 | conn.close() | |
82 | continue | |
83 | ||
84 | if not proxy.parseHeader(header): | |
85 | conn.close() | |
86 | continue | |
87 | ||
88 | proxyContent = conn.recv(proxy.contentLen) | |
89 | if not proxyContent: | |
90 | conn.close() | |
91 | continue | |
92 | ||
93 | payload = header + proxyContent | |
80d74de3 RG |
94 | while True: |
95 | try: | |
96 | data = conn.recv(2) | |
97 | except socket.timeout: | |
98 | data = None | |
f478eff5 | 99 | |
80d74de3 RG |
100 | if not data: |
101 | conn.close() | |
102 | break | |
f478eff5 | 103 | |
80d74de3 RG |
104 | (datalen,) = struct.unpack("!H", data) |
105 | data = conn.recv(datalen) | |
f478eff5 | 106 | |
80d74de3 | 107 | toQueue.put([payload, data], True, 2.0) |
f478eff5 | 108 | |
80d74de3 RG |
109 | response = fromQueue.get(True, 2.0) |
110 | if not response: | |
f478eff5 | 111 | conn.close() |
80d74de3 | 112 | break |
f478eff5 | 113 | |
80d74de3 RG |
114 | # computing the correct ID for the response |
115 | request = dns.message.from_wire(data) | |
116 | response.id = request.id | |
117 | ||
118 | wire = response.to_wire() | |
119 | conn.send(struct.pack("!H", len(wire))) | |
120 | conn.send(wire) | |
f478eff5 | 121 | |
f478eff5 RG |
122 | conn.close() |
123 | ||
124 | sock.close() | |
125 | ||
126 | toProxyQueue = Queue() | |
127 | fromProxyQueue = Queue() | |
128 | proxyResponderPort = 5470 | |
129 | ||
130 | udpResponder = threading.Thread(name='UDP Proxy Protocol Responder', target=ProxyProtocolUDPResponder, args=[proxyResponderPort, toProxyQueue, fromProxyQueue]) | |
131 | udpResponder.setDaemon(True) | |
132 | udpResponder.start() | |
133 | tcpResponder = threading.Thread(name='TCP Proxy Protocol Responder', target=ProxyProtocolTCPResponder, args=[proxyResponderPort, toProxyQueue, fromProxyQueue]) | |
134 | tcpResponder.setDaemon(True) | |
135 | tcpResponder.start() | |
136 | ||
137 | class ProxyProtocolTest(DNSDistTest): | |
138 | _proxyResponderPort = proxyResponderPort | |
139 | _config_params = ['_proxyResponderPort'] | |
140 | ||
141 | def checkMessageProxyProtocol(self, receivedProxyPayload, source, destination, isTCP, values=[]): | |
142 | proxy = ProxyProtocol() | |
143 | self.assertTrue(proxy.parseHeader(receivedProxyPayload)) | |
144 | self.assertEquals(proxy.version, 0x02) | |
145 | self.assertEquals(proxy.command, 0x01) | |
146 | self.assertEquals(proxy.family, 0x01) | |
147 | if not isTCP: | |
148 | self.assertEquals(proxy.protocol, 0x02) | |
149 | else: | |
150 | self.assertEquals(proxy.protocol, 0x01) | |
151 | self.assertGreater(proxy.contentLen, 0) | |
152 | ||
153 | self.assertTrue(proxy.parseAddressesAndPorts(receivedProxyPayload)) | |
154 | self.assertEquals(proxy.source, source) | |
155 | self.assertEquals(proxy.destination, destination) | |
156 | #self.assertEquals(proxy.sourcePort, sourcePort) | |
157 | self.assertEquals(proxy.destinationPort, self._dnsDistPort) | |
158 | ||
159 | self.assertTrue(proxy.parseAdditionalValues(receivedProxyPayload)) | |
160 | proxy.values.sort() | |
161 | values.sort() | |
162 | self.assertEquals(proxy.values, values) | |
163 | ||
164 | class TestProxyProtocol(ProxyProtocolTest): | |
165 | """ | |
166 | dnsdist is configured to prepend a Proxy Protocol header to the query | |
167 | """ | |
168 | ||
169 | _config_template = """ | |
170 | newServer{address="127.0.0.1:%d", useProxyProtocol=true} | |
171 | ||
172 | function addValues(dq) | |
e0f14b4c | 173 | local values = { [0]="foo", [42]="bar" } |
f478eff5 RG |
174 | dq:setProxyProtocolValues(values) |
175 | return DNSAction.None | |
176 | end | |
177 | ||
178 | addAction("values-lua.proxy.tests.powerdns.com.", LuaAction(addValues)) | |
6d77f7f8 | 179 | addAction("values-action.proxy.tests.powerdns.com.", SetProxyProtocolValuesAction({ ["1"]="dnsdist", ["255"]="proxy-protocol"})) |
f478eff5 RG |
180 | """ |
181 | _config_params = ['_proxyResponderPort'] | |
182 | ||
183 | def testProxyUDP(self): | |
184 | """ | |
185 | Proxy Protocol: no value (UDP) | |
186 | """ | |
187 | name = 'simple-udp.proxy.tests.powerdns.com.' | |
188 | query = dns.message.make_query(name, 'A', 'IN') | |
189 | response = dns.message.make_response(query) | |
190 | ||
191 | toProxyQueue.put(response, True, 2.0) | |
192 | ||
193 | data = query.to_wire() | |
194 | self._sock.send(data) | |
195 | receivedResponse = None | |
196 | try: | |
197 | self._sock.settimeout(2.0) | |
198 | data = self._sock.recv(4096) | |
199 | except socket.timeout: | |
200 | print('timeout') | |
201 | data = None | |
202 | if data: | |
203 | receivedResponse = dns.message.from_wire(data) | |
204 | ||
205 | (receivedProxyPayload, receivedDNSData) = fromProxyQueue.get(True, 2.0) | |
206 | self.assertTrue(receivedProxyPayload) | |
207 | self.assertTrue(receivedDNSData) | |
208 | self.assertTrue(receivedResponse) | |
209 | ||
210 | receivedQuery = dns.message.from_wire(receivedDNSData) | |
211 | receivedQuery.id = query.id | |
212 | receivedResponse.id = response.id | |
213 | self.assertEquals(receivedQuery, query) | |
214 | self.assertEquals(receivedResponse, response) | |
215 | self.checkMessageProxyProtocol(receivedProxyPayload, '127.0.0.1', '127.0.0.1', False) | |
216 | ||
217 | def testProxyTCP(self): | |
218 | """ | |
219 | Proxy Protocol: no value (TCP) | |
220 | """ | |
221 | name = 'simple-tcp.proxy.tests.powerdns.com.' | |
222 | query = dns.message.make_query(name, 'A', 'IN') | |
223 | response = dns.message.make_response(query) | |
224 | ||
225 | toProxyQueue.put(response, True, 2.0) | |
226 | ||
227 | conn = self.openTCPConnection(2.0) | |
228 | data = query.to_wire() | |
229 | self.sendTCPQueryOverConnection(conn, data, rawQuery=True) | |
230 | receivedResponse = None | |
231 | try: | |
232 | receivedResponse = self.recvTCPResponseOverConnection(conn) | |
233 | except socket.timeout: | |
234 | print('timeout') | |
235 | ||
236 | (receivedProxyPayload, receivedDNSData) = fromProxyQueue.get(True, 2.0) | |
237 | self.assertTrue(receivedProxyPayload) | |
238 | self.assertTrue(receivedDNSData) | |
239 | self.assertTrue(receivedResponse) | |
240 | ||
241 | receivedQuery = dns.message.from_wire(receivedDNSData) | |
242 | receivedQuery.id = query.id | |
243 | receivedResponse.id = response.id | |
244 | self.assertEquals(receivedQuery, query) | |
245 | self.assertEquals(receivedResponse, response) | |
246 | self.checkMessageProxyProtocol(receivedProxyPayload, '127.0.0.1', '127.0.0.1', True) | |
247 | ||
248 | def testProxyUDPWithValuesFromLua(self): | |
249 | """ | |
250 | Proxy Protocol: values from Lua (UDP) | |
251 | """ | |
252 | name = 'values-lua.proxy.tests.powerdns.com.' | |
253 | query = dns.message.make_query(name, 'A', 'IN') | |
254 | response = dns.message.make_response(query) | |
255 | ||
256 | toProxyQueue.put(response, True, 2.0) | |
257 | ||
258 | data = query.to_wire() | |
259 | self._sock.send(data) | |
260 | receivedResponse = None | |
261 | try: | |
262 | self._sock.settimeout(2.0) | |
263 | data = self._sock.recv(4096) | |
264 | except socket.timeout: | |
265 | print('timeout') | |
266 | data = None | |
267 | if data: | |
268 | receivedResponse = dns.message.from_wire(data) | |
269 | ||
270 | (receivedProxyPayload, receivedDNSData) = fromProxyQueue.get(True, 2.0) | |
271 | self.assertTrue(receivedProxyPayload) | |
272 | self.assertTrue(receivedDNSData) | |
273 | self.assertTrue(receivedResponse) | |
274 | ||
275 | receivedQuery = dns.message.from_wire(receivedDNSData) | |
276 | receivedQuery.id = query.id | |
277 | receivedResponse.id = response.id | |
278 | self.assertEquals(receivedQuery, query) | |
279 | self.assertEquals(receivedResponse, response) | |
280 | self.checkMessageProxyProtocol(receivedProxyPayload, '127.0.0.1', '127.0.0.1', False, [ [0, b'foo'] , [ 42, b'bar'] ]) | |
281 | ||
282 | def testProxyTCPWithValuesFromLua(self): | |
283 | """ | |
284 | Proxy Protocol: values from Lua (TCP) | |
285 | """ | |
286 | name = 'values-lua.proxy.tests.powerdns.com.' | |
287 | query = dns.message.make_query(name, 'A', 'IN') | |
288 | response = dns.message.make_response(query) | |
289 | ||
290 | toProxyQueue.put(response, True, 2.0) | |
291 | ||
292 | conn = self.openTCPConnection(2.0) | |
293 | data = query.to_wire() | |
294 | self.sendTCPQueryOverConnection(conn, data, rawQuery=True) | |
295 | receivedResponse = None | |
296 | try: | |
297 | receivedResponse = self.recvTCPResponseOverConnection(conn) | |
298 | except socket.timeout: | |
299 | print('timeout') | |
300 | ||
301 | (receivedProxyPayload, receivedDNSData) = fromProxyQueue.get(True, 2.0) | |
302 | self.assertTrue(receivedProxyPayload) | |
303 | self.assertTrue(receivedDNSData) | |
304 | self.assertTrue(receivedResponse) | |
305 | ||
306 | receivedQuery = dns.message.from_wire(receivedDNSData) | |
307 | receivedQuery.id = query.id | |
308 | receivedResponse.id = response.id | |
309 | self.assertEquals(receivedQuery, query) | |
310 | self.assertEquals(receivedResponse, response) | |
311 | self.checkMessageProxyProtocol(receivedProxyPayload, '127.0.0.1', '127.0.0.1', True, [ [0, b'foo'] , [ 42, b'bar'] ]) | |
6d77f7f8 RG |
312 | |
313 | def testProxyUDPWithValuesFromAction(self): | |
314 | """ | |
315 | Proxy Protocol: values from Action (UDP) | |
316 | """ | |
317 | name = 'values-action.proxy.tests.powerdns.com.' | |
318 | query = dns.message.make_query(name, 'A', 'IN') | |
319 | response = dns.message.make_response(query) | |
320 | ||
321 | toProxyQueue.put(response, True, 2.0) | |
322 | ||
323 | data = query.to_wire() | |
324 | self._sock.send(data) | |
325 | receivedResponse = None | |
326 | try: | |
327 | self._sock.settimeout(2.0) | |
328 | data = self._sock.recv(4096) | |
329 | except socket.timeout: | |
330 | print('timeout') | |
331 | data = None | |
332 | if data: | |
333 | receivedResponse = dns.message.from_wire(data) | |
334 | ||
335 | (receivedProxyPayload, receivedDNSData) = fromProxyQueue.get(True, 2.0) | |
336 | self.assertTrue(receivedProxyPayload) | |
337 | self.assertTrue(receivedDNSData) | |
338 | self.assertTrue(receivedResponse) | |
339 | ||
340 | receivedQuery = dns.message.from_wire(receivedDNSData) | |
341 | receivedQuery.id = query.id | |
342 | receivedResponse.id = response.id | |
343 | self.assertEquals(receivedQuery, query) | |
344 | self.assertEquals(receivedResponse, response) | |
345 | self.checkMessageProxyProtocol(receivedProxyPayload, '127.0.0.1', '127.0.0.1', False, [ [1, b'dnsdist'] , [ 255, b'proxy-protocol'] ]) | |
346 | ||
347 | def testProxyTCPWithValuesFromAction(self): | |
348 | """ | |
349 | Proxy Protocol: values from Action (TCP) | |
350 | """ | |
351 | name = 'values-action.proxy.tests.powerdns.com.' | |
352 | query = dns.message.make_query(name, 'A', 'IN') | |
353 | response = dns.message.make_response(query) | |
354 | ||
355 | toProxyQueue.put(response, True, 2.0) | |
356 | ||
357 | conn = self.openTCPConnection(2.0) | |
358 | data = query.to_wire() | |
359 | self.sendTCPQueryOverConnection(conn, data, rawQuery=True) | |
360 | receivedResponse = None | |
361 | try: | |
362 | receivedResponse = self.recvTCPResponseOverConnection(conn) | |
363 | except socket.timeout: | |
364 | print('timeout') | |
365 | ||
366 | (receivedProxyPayload, receivedDNSData) = fromProxyQueue.get(True, 2.0) | |
367 | self.assertTrue(receivedProxyPayload) | |
368 | self.assertTrue(receivedDNSData) | |
369 | self.assertTrue(receivedResponse) | |
370 | ||
371 | receivedQuery = dns.message.from_wire(receivedDNSData) | |
372 | receivedQuery.id = query.id | |
373 | receivedResponse.id = response.id | |
374 | self.assertEquals(receivedQuery, query) | |
375 | self.assertEquals(receivedResponse, response) | |
376 | self.checkMessageProxyProtocol(receivedProxyPayload, '127.0.0.1', '127.0.0.1', True, [ [1, b'dnsdist'] , [ 255, b'proxy-protocol'] ]) | |
80d74de3 RG |
377 | |
378 | def testProxyTCPSeveralQueriesOnSameConnection(self): | |
379 | """ | |
380 | Proxy Protocol: Several queries on the same TCP connection | |
381 | """ | |
382 | name = 'several-queries-same-conn.proxy.tests.powerdns.com.' | |
383 | query = dns.message.make_query(name, 'A', 'IN') | |
384 | response = dns.message.make_response(query) | |
385 | ||
386 | conn = self.openTCPConnection(2.0) | |
387 | data = query.to_wire() | |
388 | ||
389 | for idx in range(10): | |
390 | toProxyQueue.put(response, True, 2.0) | |
391 | self.sendTCPQueryOverConnection(conn, data, rawQuery=True) | |
392 | receivedResponse = None | |
393 | try: | |
394 | receivedResponse = self.recvTCPResponseOverConnection(conn) | |
395 | except socket.timeout: | |
396 | print('timeout') | |
397 | ||
398 | (receivedProxyPayload, receivedDNSData) = fromProxyQueue.get(True, 2.0) | |
399 | self.assertTrue(receivedProxyPayload) | |
400 | self.assertTrue(receivedDNSData) | |
401 | self.assertTrue(receivedResponse) | |
402 | ||
403 | receivedQuery = dns.message.from_wire(receivedDNSData) | |
404 | receivedQuery.id = query.id | |
405 | receivedResponse.id = response.id | |
406 | self.assertEquals(receivedQuery, query) | |
407 | self.assertEquals(receivedResponse, response) | |
408 | self.checkMessageProxyProtocol(receivedProxyPayload, '127.0.0.1', '127.0.0.1', True, []) |