1 //
2 //
3 // Copyright 2015 gRPC authors.
4 //
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 //
9 // http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16 //
17 //
18
19 #include <grpc/impl/propagation_bits.h>
20 #include <grpc/slice.h>
21 #include <grpc/status.h>
22 #include <grpc/support/time.h>
23
24 #include <algorithm>
25 #include <memory>
26 #include <string>
27
28 #include "absl/log/check.h"
29 #include "absl/log/log.h"
30 #include "absl/status/statusor.h"
31 #include "src/core/lib/iomgr/port.h"
32 #include "src/core/lib/iomgr/resolved_address.h"
33
34 // This test won't work except with posix sockets enabled
35 #ifdef GRPC_POSIX_SOCKET_EV
36
37 #include <grpc/credentials.h>
38 #include <grpc/grpc.h>
39 #include <grpc/grpc_security.h>
40 #include <grpc/support/alloc.h>
41 #include <string.h>
42
43 #include <vector>
44
45 #include "absl/strings/str_format.h"
46 #include "absl/strings/str_join.h"
47 #include "absl/strings/str_split.h"
48 #include "absl/strings/string_view.h"
49 #include "src/core/lib/address_utils/sockaddr_utils.h"
50 #include "src/core/lib/iomgr/error.h"
51 #include "src/core/lib/iomgr/resolve_address.h"
52 #include "src/core/lib/iomgr/socket_utils_posix.h"
53 #include "src/core/lib/transport/error_utils.h"
54 #include "src/core/util/host_port.h"
55 #include "test/core/end2end/cq_verifier.h"
56 #include "test/core/test_util/port.h"
57 #include "test/core/test_util/test_config.h"
58
59 // This test exercises IPv4, IPv6, and dualstack sockets in various ways.
60
drain_cq(grpc_completion_queue * cq)61 static void drain_cq(grpc_completion_queue* cq) {
62 grpc_event ev;
63 do {
64 ev = grpc_completion_queue_next(
65 cq, grpc_timeout_milliseconds_to_deadline(5000), nullptr);
66 } while (ev.type != GRPC_QUEUE_SHUTDOWN);
67 }
68
log_resolved_addrs(const char * label,const char * hostname)69 static void log_resolved_addrs(const char* label, const char* hostname) {
70 absl::StatusOr<std::vector<grpc_resolved_address>> addresses_or =
71 grpc_core::GetDNSResolver()->LookupHostnameBlocking(hostname, "80");
72 if (!addresses_or.ok()) {
73 GRPC_LOG_IF_ERROR(hostname,
74 absl_status_to_grpc_error(addresses_or.status()));
75 return;
76 }
77 for (const auto& addr : *addresses_or) {
78 LOG(INFO) << label << ": " << grpc_sockaddr_to_uri(&addr)->c_str();
79 }
80 }
81
test_connect(const char * server_host,const char * client_host,int port,int expect_ok)82 void test_connect(const char* server_host, const char* client_host, int port,
83 int expect_ok) {
84 grpc_channel* client;
85 grpc_server* server;
86 grpc_completion_queue* cq;
87 grpc_call* c;
88 grpc_call* s;
89 gpr_timespec deadline;
90 int got_port;
91 grpc_op ops[6];
92 grpc_op* op;
93 grpc_metadata_array initial_metadata_recv;
94 grpc_metadata_array trailing_metadata_recv;
95 grpc_metadata_array request_metadata_recv;
96 grpc_status_code status;
97 grpc_call_error error;
98 grpc_slice details;
99 int was_cancelled = 2;
100 grpc_call_details call_details;
101 char* peer;
102 int picked_port = 0;
103
104 if (port == 0) {
105 port = grpc_pick_unused_port_or_die();
106 picked_port = 1;
107 }
108
109 std::string server_hostport = grpc_core::JoinHostPort(server_host, port);
110
111 grpc_metadata_array_init(&initial_metadata_recv);
112 grpc_metadata_array_init(&trailing_metadata_recv);
113 grpc_metadata_array_init(&request_metadata_recv);
114 grpc_call_details_init(&call_details);
115
116 // Create server.
117 cq = grpc_completion_queue_create_for_next(nullptr);
118 server = grpc_server_create(nullptr, nullptr);
119 grpc_server_register_completion_queue(server, cq, nullptr);
120 grpc_server_credentials* server_creds =
121 grpc_insecure_server_credentials_create();
122 CHECK((got_port = grpc_server_add_http2_port(server, server_hostport.c_str(),
123 server_creds)) > 0);
124 grpc_server_credentials_release(server_creds);
125 if (port == 0) {
126 port = got_port;
127 } else {
128 CHECK_EQ(port, got_port);
129 }
130 grpc_server_start(server);
131 grpc_core::CqVerifier cqv(cq);
132
133 // Create client.
134 std::string client_hostport;
135 if (client_host[0] == 'i') {
136 // for ipv4:/ipv6: addresses, concatenate the port to each of the parts
137 std::vector<absl::string_view> uri_parts =
138 absl::StrSplit(client_host, ',', absl::SkipEmpty());
139 std::vector<std::string> hosts_with_port;
140 hosts_with_port.reserve(uri_parts.size());
141 for (const absl::string_view& uri_part : uri_parts) {
142 hosts_with_port.push_back(absl::StrFormat("%s:%d", uri_part, port));
143 }
144 client_hostport = absl::StrJoin(hosts_with_port, ",");
145 } else {
146 client_hostport = grpc_core::JoinHostPort(client_host, port);
147 }
148 grpc_channel_credentials* creds = grpc_insecure_credentials_create();
149 client = grpc_channel_create(client_hostport.c_str(), creds, nullptr);
150 grpc_channel_credentials_release(creds);
151
152 LOG(INFO) << "Testing with server=" << server_hostport.c_str()
153 << " client=" << client_hostport.c_str() << " (expecting "
154 << (expect_ok ? "success" : "failure") << ")";
155 log_resolved_addrs("server resolved addr", server_host);
156 log_resolved_addrs("client resolved addr", client_host);
157
158 if (expect_ok) {
159 // Normal deadline, shouldn't be reached.
160 deadline = grpc_timeout_milliseconds_to_deadline(60000);
161 } else {
162 // Give up faster when failure is expected.
163 // BUG: Setting this to 1000 reveals a memory leak (b/18608927).
164 deadline = grpc_timeout_milliseconds_to_deadline(8000);
165 }
166
167 // Send a trivial request.
168 grpc_slice host = grpc_slice_from_static_string("foo.test.google.fr");
169 c = grpc_channel_create_call(client, nullptr, GRPC_PROPAGATE_DEFAULTS, cq,
170 grpc_slice_from_static_string("/foo"), &host,
171 deadline, nullptr);
172 CHECK(c);
173
174 memset(ops, 0, sizeof(ops));
175 op = ops;
176 op->op = GRPC_OP_SEND_INITIAL_METADATA;
177 op->data.send_initial_metadata.count = 0;
178 op->flags = expect_ok ? GRPC_INITIAL_METADATA_WAIT_FOR_READY : 0;
179 op->reserved = nullptr;
180 op++;
181 op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
182 op->flags = 0;
183 op->reserved = nullptr;
184 op++;
185 op->op = GRPC_OP_RECV_INITIAL_METADATA;
186 op->data.recv_initial_metadata.recv_initial_metadata = &initial_metadata_recv;
187 op->flags = 0;
188 op->reserved = nullptr;
189 op++;
190 op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
191 op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
192 op->data.recv_status_on_client.status = &status;
193 op->data.recv_status_on_client.status_details = &details;
194 op->flags = 0;
195 op->reserved = nullptr;
196 op++;
197 error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops),
198 grpc_core::CqVerifier::tag(1), nullptr);
199 CHECK_EQ(error, GRPC_CALL_OK);
200
201 if (expect_ok) {
202 // Check for a successful request.
203 error = grpc_server_request_call(server, &s, &call_details,
204 &request_metadata_recv, cq, cq,
205 grpc_core::CqVerifier::tag(101));
206 CHECK_EQ(error, GRPC_CALL_OK);
207 cqv.Expect(grpc_core::CqVerifier::tag(101), true);
208 cqv.Verify();
209
210 memset(ops, 0, sizeof(ops));
211 op = ops;
212 op->op = GRPC_OP_SEND_INITIAL_METADATA;
213 op->data.send_initial_metadata.count = 0;
214 op->flags = 0;
215 op++;
216 op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
217 op->data.send_status_from_server.trailing_metadata_count = 0;
218 op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
219 grpc_slice status_details = grpc_slice_from_static_string("xyz");
220 op->data.send_status_from_server.status_details = &status_details;
221 op->flags = 0;
222 op++;
223 op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
224 op->data.recv_close_on_server.cancelled = &was_cancelled;
225 op->flags = 0;
226 op++;
227 error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops),
228 grpc_core::CqVerifier::tag(102), nullptr);
229 CHECK_EQ(error, GRPC_CALL_OK);
230
231 cqv.Expect(grpc_core::CqVerifier::tag(102), true);
232 cqv.Expect(grpc_core::CqVerifier::tag(1), true);
233 cqv.Verify();
234
235 peer = grpc_call_get_peer(c);
236 VLOG(2) << "got peer: '" << peer << "'";
237 gpr_free(peer);
238
239 CHECK_EQ(status, GRPC_STATUS_UNIMPLEMENTED);
240 CHECK_EQ(grpc_slice_str_cmp(details, "xyz"), 0);
241 CHECK_EQ(grpc_slice_str_cmp(call_details.method, "/foo"), 0);
242 CHECK_EQ(grpc_slice_str_cmp(call_details.host, "foo.test.google.fr"), 0);
243 CHECK_EQ(was_cancelled, 0);
244
245 grpc_call_unref(s);
246 } else {
247 // Check for a failed connection.
248 cqv.Expect(grpc_core::CqVerifier::tag(1), true);
249 cqv.Verify();
250
251 LOG(INFO) << "status: " << status
252 << " (expected: " << GRPC_STATUS_UNAVAILABLE << ")";
253 CHECK_EQ(status, GRPC_STATUS_UNAVAILABLE);
254 }
255
256 grpc_call_unref(c);
257
258 // Destroy client.
259 grpc_channel_destroy(client);
260
261 // Destroy server.
262 grpc_server_shutdown_and_notify(server, cq, grpc_core::CqVerifier::tag(1000));
263 grpc_event ev;
264 do {
265 ev = grpc_completion_queue_next(cq, grpc_timeout_seconds_to_deadline(5),
266 nullptr);
267 } while (ev.type != GRPC_OP_COMPLETE ||
268 ev.tag != grpc_core::CqVerifier::tag(1000));
269
270 grpc_server_destroy(server);
271 grpc_completion_queue_shutdown(cq);
272 drain_cq(cq);
273 grpc_completion_queue_destroy(cq);
274
275 grpc_metadata_array_destroy(&initial_metadata_recv);
276 grpc_metadata_array_destroy(&trailing_metadata_recv);
277 grpc_metadata_array_destroy(&request_metadata_recv);
278
279 grpc_call_details_destroy(&call_details);
280 grpc_slice_unref(details);
281 if (picked_port) {
282 grpc_recycle_unused_port(port);
283 }
284 }
285
external_dns_works(const char * host)286 int external_dns_works(const char* host) {
287 auto addresses_or =
288 grpc_core::GetDNSResolver()->LookupHostnameBlocking(host, "80");
289 if (!addresses_or.ok()) {
290 return 0;
291 }
292 int result = 1;
293 for (const auto& addr : *addresses_or) {
294 // Kokoro on Macservice uses Google DNS64 servers by default
295 // (https://en.wikipedia.org/wiki/Google_Public_DNS) and that breaks
296 // "dualstack_socket_test" due to loopback4.unittest.grpc.io resolving to
297 // [64:ff9b::7f00:1]. (Working as expected for DNS64, but it prevents the
298 // dualstack_socket_test from functioning correctly). See b/201064791.
299 if (grpc_sockaddr_to_uri(&addr).value() ==
300 "ipv6:%5B64:ff9b::7f00:1%5D:80") {
301 LOG(INFO) << "Detected DNS64 server response. Tests that depend on "
302 "*.unittest.grpc.io. will be skipped as they won't work "
303 "with DNS64.";
304 result = 0;
305 break;
306 }
307 }
308 return result;
309 }
310
main(int argc,char ** argv)311 int main(int argc, char** argv) {
312 int do_ipv6 = 1;
313
314 grpc::testing::TestEnvironment env(&argc, argv);
315 grpc_init();
316
317 if (!grpc_ipv6_loopback_available()) {
318 LOG(INFO) << "Can't bind to ::1. Skipping IPv6 tests.";
319 do_ipv6 = 0;
320 }
321
322 // For coverage, test with and without dualstack sockets.
323 for (grpc_forbid_dualstack_sockets_for_testing = 0;
324 grpc_forbid_dualstack_sockets_for_testing <= 1;
325 grpc_forbid_dualstack_sockets_for_testing++) {
326 // :: and 0.0.0.0 are handled identically.
327 test_connect("::", "127.0.0.1", 0, 1);
328 test_connect("::", "::ffff:127.0.0.1", 0, 1);
329 test_connect("::", "ipv4:127.0.0.1", 0, 1);
330 test_connect("::", "ipv6:[::ffff:127.0.0.1]", 0, 1);
331 test_connect("::", "localhost", 0, 1);
332 test_connect("0.0.0.0", "127.0.0.1", 0, 1);
333 test_connect("0.0.0.0", "::ffff:127.0.0.1", 0, 1);
334 test_connect("0.0.0.0", "ipv4:127.0.0.1", 0, 1);
335 test_connect("0.0.0.0", "ipv4:127.0.0.1,127.0.0.2,127.0.0.3", 0, 1);
336 test_connect("0.0.0.0", "ipv6:[::ffff:127.0.0.1],[::ffff:127.0.0.2]", 0, 1);
337 test_connect("0.0.0.0", "localhost", 0, 1);
338 if (do_ipv6) {
339 test_connect("::", "::1", 0, 1);
340 test_connect("0.0.0.0", "::1", 0, 1);
341 test_connect("::", "ipv6:[::1]", 0, 1);
342 test_connect("0.0.0.0", "ipv6:[::1]", 0, 1);
343 }
344
345 // These only work when the families agree.
346 test_connect("127.0.0.1", "127.0.0.1", 0, 1);
347 test_connect("127.0.0.1", "ipv4:127.0.0.1", 0, 1);
348 if (do_ipv6) {
349 test_connect("::1", "::1", 0, 1);
350 test_connect("::1", "127.0.0.1", 0, 0);
351 test_connect("127.0.0.1", "::1", 0, 0);
352 test_connect("::1", "ipv6:[::1]", 0, 1);
353 test_connect("::1", "ipv4:127.0.0.1", 0, 0);
354 test_connect("127.0.0.1", "ipv6:[::1]", 0, 0);
355 }
356
357 if (!external_dns_works("loopback4.unittest.grpc.io") ||
358 !external_dns_works("loopback46.unittest.grpc.io")) {
359 LOG(INFO) << "Skipping tests that depend on *.unittest.grpc.io.";
360 } else {
361 test_connect("loopback46.unittest.grpc.io", "loopback4.unittest.grpc.io",
362 0, 1);
363 test_connect("loopback4.unittest.grpc.io", "loopback46.unittest.grpc.io",
364 0, 1);
365 if (do_ipv6) {
366 test_connect("loopback46.unittest.grpc.io",
367 "loopback6.unittest.grpc.io", 0, 1);
368 test_connect("loopback6.unittest.grpc.io",
369 "loopback46.unittest.grpc.io", 0, 1);
370 test_connect("loopback4.unittest.grpc.io", "loopback6.unittest.grpc.io",
371 0, 0);
372 test_connect("loopback6.unittest.grpc.io", "loopback4.unittest.grpc.io",
373 0, 0);
374 }
375 }
376 }
377
378 grpc_shutdown();
379
380 return 0;
381 }
382
383 #else // GRPC_POSIX_SOCKET_EV
384
main(int argc,char ** argv)385 int main(int argc, char** argv) { return 1; }
386
387 #endif // GRPC_POSIX_SOCKET_EV
388