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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include "src/core/lib/iomgr/resolve_address.h"
#include <string.h>
#include <sys/un.h>
#include <grpc/grpc.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/sync.h>
#include <grpc/support/time.h>
#include "src/core/lib/gpr/env.h"
#include "src/core/lib/gpr/string.h"
#include "src/core/lib/gpr/useful.h"
#include "src/core/lib/gprpp/thd.h"
#include "src/core/lib/iomgr/executor.h"
#include "src/core/lib/iomgr/iomgr.h"
#include "test/core/util/test_config.h"
static gpr_timespec test_deadline(void) {
return grpc_timeout_seconds_to_deadline(100);
}
typedef struct args_struct {
grpc_core::Thread thd;
gpr_event ev;
grpc_resolved_addresses* addrs;
gpr_atm done_atm;
gpr_mu* mu;
grpc_pollset* pollset;
grpc_pollset_set* pollset_set;
} args_struct;
static void do_nothing(void* arg, grpc_error* error) {}
void args_init(args_struct* args) {
gpr_event_init(&args->ev);
args->pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
grpc_pollset_init(args->pollset, &args->mu);
args->pollset_set = grpc_pollset_set_create();
grpc_pollset_set_add_pollset(args->pollset_set, args->pollset);
args->addrs = nullptr;
}
void args_finish(args_struct* args) {
GPR_ASSERT(gpr_event_wait(&args->ev, test_deadline()));
args->thd.Join();
// Don't need to explicitly destruct args->thd since
// args is actually going to be destructed, not just freed
grpc_resolved_addresses_destroy(args->addrs);
grpc_pollset_set_del_pollset(args->pollset_set, args->pollset);
grpc_pollset_set_destroy(args->pollset_set);
grpc_closure do_nothing_cb;
GRPC_CLOSURE_INIT(&do_nothing_cb, do_nothing, nullptr,
grpc_schedule_on_exec_ctx);
grpc_pollset_shutdown(args->pollset, &do_nothing_cb);
// exec_ctx needs to be flushed before calling grpc_pollset_destroy()
grpc_core::ExecCtx::Get()->Flush();
grpc_pollset_destroy(args->pollset);
gpr_free(args->pollset);
}
static grpc_millis n_sec_deadline(int seconds) {
return grpc_timespec_to_millis_round_up(
grpc_timeout_seconds_to_deadline(seconds));
}
static void actually_poll(void* argsp) {
args_struct* args = static_cast<args_struct*>(argsp);
grpc_millis deadline = n_sec_deadline(10);
while (true) {
grpc_core::ExecCtx exec_ctx;
bool done = gpr_atm_acq_load(&args->done_atm) != 0;
if (done) {
break;
}
grpc_millis time_left = deadline - grpc_core::ExecCtx::Get()->Now();
gpr_log(GPR_DEBUG, "done=%d, time_left=%" PRId64, done, time_left);
GPR_ASSERT(time_left >= 0);
grpc_pollset_worker* worker = nullptr;
gpr_mu_lock(args->mu);
GRPC_LOG_IF_ERROR("pollset_work", grpc_pollset_work(args->pollset, &worker,
n_sec_deadline(1)));
gpr_mu_unlock(args->mu);
grpc_core::ExecCtx::Get()->Flush();
}
gpr_event_set(&args->ev, (void*)1);
}
static void poll_pollset_until_request_done(args_struct* args) {
gpr_atm_rel_store(&args->done_atm, 0);
args->thd = grpc_core::Thread("grpc_poll_pollset", actually_poll, args);
args->thd.Start();
}
static void must_succeed(void* argsp, grpc_error* err) {
args_struct* args = static_cast<args_struct*>(argsp);
GPR_ASSERT(err == GRPC_ERROR_NONE);
GPR_ASSERT(args->addrs != nullptr);
GPR_ASSERT(args->addrs->naddrs > 0);
gpr_atm_rel_store(&args->done_atm, 1);
}
static void must_fail(void* argsp, grpc_error* err) {
args_struct* args = static_cast<args_struct*>(argsp);
GPR_ASSERT(err != GRPC_ERROR_NONE);
gpr_atm_rel_store(&args->done_atm, 1);
}
static void test_unix_socket(void) {
grpc_core::ExecCtx exec_ctx;
args_struct args;
args_init(&args);
poll_pollset_until_request_done(&args);
grpc_resolve_address(
"unix:/path/name", nullptr, args.pollset_set,
GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx),
&args.addrs);
args_finish(&args);
}
static void test_unix_socket_path_name_too_long(void) {
grpc_core::ExecCtx exec_ctx;
args_struct args;
args_init(&args);
const char prefix[] = "unix:/path/name";
size_t path_name_length =
GPR_ARRAY_SIZE(((struct sockaddr_un*)nullptr)->sun_path) + 6;
char* path_name =
static_cast<char*>(gpr_malloc(sizeof(char) * path_name_length));
memset(path_name, 'a', path_name_length);
memcpy(path_name, prefix, strlen(prefix) - 1);
path_name[path_name_length - 1] = '\0';
poll_pollset_until_request_done(&args);
grpc_resolve_address(
path_name, nullptr, args.pollset_set,
GRPC_CLOSURE_CREATE(must_fail, &args, grpc_schedule_on_exec_ctx),
&args.addrs);
gpr_free(path_name);
args_finish(&args);
}
int main(int argc, char** argv) {
grpc::testing::TestEnvironment env(argc, argv);
grpc_init();
{
grpc_core::ExecCtx exec_ctx;
char* resolver_env = gpr_getenv("GRPC_DNS_RESOLVER");
// c-ares resolver doesn't support UDS (ability for native DNS resolver
// to handle this is only expected to be used by servers, which
// unconditionally use the native DNS resolver).
if (resolver_env == nullptr || gpr_stricmp(resolver_env, "native") == 0) {
test_unix_socket();
test_unix_socket_path_name_too_long();
}
gpr_free(resolver_env);
}
grpc_shutdown();
return 0;
}
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