1 /*
2 *
3 * Copyright 2016 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 "src/core/lib/iomgr/resolve_address.h"
20
21 #include <string.h>
22 #include <sys/un.h>
23
24 #include <grpc/grpc.h>
25 #include <grpc/support/alloc.h>
26 #include <grpc/support/log.h>
27 #include <grpc/support/sync.h>
28 #include <grpc/support/time.h>
29
30 #include "src/core/lib/gpr/useful.h"
31 #include "src/core/lib/gprpp/thd.h"
32 #include "src/core/lib/iomgr/executor.h"
33 #include "src/core/lib/iomgr/iomgr.h"
34 #include "test/core/util/test_config.h"
35
test_deadline(void)36 static gpr_timespec test_deadline(void) {
37 return grpc_timeout_seconds_to_deadline(100);
38 }
39
40 typedef struct args_struct {
41 grpc_core::Thread thd;
42 gpr_event ev;
43 grpc_resolved_addresses* addrs;
44 gpr_atm done_atm;
45 gpr_mu* mu;
46 grpc_pollset* pollset;
47 grpc_pollset_set* pollset_set;
48 } args_struct;
49
do_nothing(void * arg,grpc_error * error)50 static void do_nothing(void* arg, grpc_error* error) {}
51
args_init(args_struct * args)52 void args_init(args_struct* args) {
53 gpr_event_init(&args->ev);
54 args->pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
55 grpc_pollset_init(args->pollset, &args->mu);
56 args->pollset_set = grpc_pollset_set_create();
57 grpc_pollset_set_add_pollset(args->pollset_set, args->pollset);
58 args->addrs = nullptr;
59 }
60
args_finish(args_struct * args)61 void args_finish(args_struct* args) {
62 GPR_ASSERT(gpr_event_wait(&args->ev, test_deadline()));
63 args->thd.Join();
64 // Don't need to explicitly destruct args->thd since
65 // args is actually going to be destructed, not just freed
66 grpc_resolved_addresses_destroy(args->addrs);
67 grpc_pollset_set_del_pollset(args->pollset_set, args->pollset);
68 grpc_pollset_set_destroy(args->pollset_set);
69 grpc_closure do_nothing_cb;
70 GRPC_CLOSURE_INIT(&do_nothing_cb, do_nothing, nullptr,
71 grpc_schedule_on_exec_ctx);
72 grpc_pollset_shutdown(args->pollset, &do_nothing_cb);
73 // exec_ctx needs to be flushed before calling grpc_pollset_destroy()
74 grpc_core::ExecCtx::Get()->Flush();
75 grpc_pollset_destroy(args->pollset);
76 gpr_free(args->pollset);
77 }
78
n_sec_deadline(int seconds)79 static grpc_millis n_sec_deadline(int seconds) {
80 return grpc_timespec_to_millis_round_up(
81 grpc_timeout_seconds_to_deadline(seconds));
82 }
83
actually_poll(void * argsp)84 static void actually_poll(void* argsp) {
85 args_struct* args = static_cast<args_struct*>(argsp);
86 grpc_millis deadline = n_sec_deadline(10);
87 while (true) {
88 grpc_core::ExecCtx exec_ctx;
89 bool done = gpr_atm_acq_load(&args->done_atm) != 0;
90 if (done) {
91 break;
92 }
93 grpc_millis time_left = deadline - grpc_core::ExecCtx::Get()->Now();
94 gpr_log(GPR_DEBUG, "done=%d, time_left=%" PRId64, done, time_left);
95 GPR_ASSERT(time_left >= 0);
96 grpc_pollset_worker* worker = nullptr;
97 gpr_mu_lock(args->mu);
98 GRPC_LOG_IF_ERROR("pollset_work", grpc_pollset_work(args->pollset, &worker,
99 n_sec_deadline(1)));
100 gpr_mu_unlock(args->mu);
101 grpc_core::ExecCtx::Get()->Flush();
102 }
103 gpr_event_set(&args->ev, (void*)1);
104 }
105
poll_pollset_until_request_done(args_struct * args)106 static void poll_pollset_until_request_done(args_struct* args) {
107 gpr_atm_rel_store(&args->done_atm, 0);
108 args->thd = grpc_core::Thread("grpc_poll_pollset", actually_poll, args);
109 args->thd.Start();
110 }
111
must_succeed(void * argsp,grpc_error * err)112 static void must_succeed(void* argsp, grpc_error* err) {
113 args_struct* args = static_cast<args_struct*>(argsp);
114 GPR_ASSERT(err == GRPC_ERROR_NONE);
115 GPR_ASSERT(args->addrs != nullptr);
116 GPR_ASSERT(args->addrs->naddrs > 0);
117 gpr_atm_rel_store(&args->done_atm, 1);
118 }
119
must_fail(void * argsp,grpc_error * err)120 static void must_fail(void* argsp, grpc_error* err) {
121 args_struct* args = static_cast<args_struct*>(argsp);
122 GPR_ASSERT(err != GRPC_ERROR_NONE);
123 gpr_atm_rel_store(&args->done_atm, 1);
124 }
125
test_unix_socket(void)126 static void test_unix_socket(void) {
127 grpc_core::ExecCtx exec_ctx;
128 args_struct args;
129 args_init(&args);
130 poll_pollset_until_request_done(&args);
131 grpc_resolve_address(
132 "unix:/path/name", nullptr, args.pollset_set,
133 GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
134 &args.addrs);
135 args_finish(&args);
136 }
137
test_unix_socket_path_name_too_long(void)138 static void test_unix_socket_path_name_too_long(void) {
139 grpc_core::ExecCtx exec_ctx;
140 args_struct args;
141 args_init(&args);
142 const char prefix[] = "unix:/path/name";
143 size_t path_name_length =
144 GPR_ARRAY_SIZE(((struct sockaddr_un*)nullptr)->sun_path) + 6;
145 char* path_name =
146 static_cast<char*>(gpr_malloc(sizeof(char) * path_name_length));
147 memset(path_name, 'a', path_name_length);
148 memcpy(path_name, prefix, strlen(prefix) - 1);
149 path_name[path_name_length - 1] = '\0';
150
151 poll_pollset_until_request_done(&args);
152 grpc_resolve_address(
153 path_name, nullptr, args.pollset_set,
154 GRPC_CLOSURE_CREATE(must_fail, &args, grpc_schedule_on_exec_ctx),
155 &args.addrs);
156 gpr_free(path_name);
157 args_finish(&args);
158 }
159
main(int argc,char ** argv)160 int main(int argc, char** argv) {
161 grpc_test_init(argc, argv);
162 grpc_init();
163
164 {
165 grpc_core::ExecCtx exec_ctx;
166 test_unix_socket();
167 test_unix_socket_path_name_too_long();
168 }
169
170 grpc_shutdown();
171 return 0;
172 }
173