| /* |
| * |
| * 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 <net/if.h> |
| #include <string.h> |
| #include <sys/un.h> |
| |
| #include <string> |
| |
| #include "absl/strings/str_format.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/ext/filters/client_channel/resolver/dns/dns_resolver_selection.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/cmdline.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); |
| gpr_mu_lock(args->mu); |
| GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, nullptr)); |
| gpr_mu_unlock(args->mu); |
| } |
| |
| 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); |
| gpr_mu_lock(args->mu); |
| GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(args->pollset, nullptr)); |
| gpr_mu_unlock(args->mu); |
| } |
| |
| static void resolve_address_must_succeed(const char* target) { |
| grpc_core::ExecCtx exec_ctx; |
| args_struct args; |
| args_init(&args); |
| poll_pollset_until_request_done(&args); |
| grpc_resolve_address( |
| target, "1" /* port number */, args.pollset_set, |
| GRPC_CLOSURE_CREATE(must_succeed, &args, grpc_schedule_on_exec_ctx), |
| &args.addrs); |
| grpc_core::ExecCtx::Get()->Flush(); |
| args_finish(&args); |
| } |
| |
| static void test_named_and_numeric_scope_ids(void) { |
| char* arbitrary_interface_name = static_cast<char*>(gpr_zalloc(IF_NAMESIZE)); |
| int interface_index = 0; |
| // Probe candidate interface index numbers until we find one that the |
| // system recognizes, and then use that for the test. |
| for (size_t i = 1; i < 65536; i++) { |
| if (if_indextoname(i, arbitrary_interface_name) != nullptr) { |
| gpr_log( |
| GPR_DEBUG, |
| "Found interface at index %d named %s. Will use this for the test", |
| static_cast<int>(i), arbitrary_interface_name); |
| interface_index = static_cast<int>(i); |
| break; |
| } |
| } |
| GPR_ASSERT(strlen(arbitrary_interface_name) > 0); |
| // Test resolution of an ipv6 address with a named scope ID |
| gpr_log(GPR_DEBUG, "test resolution with a named scope ID"); |
| std::string target_with_named_scope_id = |
| absl::StrFormat("fe80::1234%%%s", arbitrary_interface_name); |
| resolve_address_must_succeed(target_with_named_scope_id.c_str()); |
| gpr_free(arbitrary_interface_name); |
| // Test resolution of an ipv6 address with a numeric scope ID |
| gpr_log(GPR_DEBUG, "test resolution with a numeric scope ID"); |
| std::string target_with_numeric_scope_id = |
| absl::StrFormat("fe80::1234%%%d", interface_index); |
| resolve_address_must_succeed(target_with_numeric_scope_id.c_str()); |
| } |
| |
| int main(int argc, char** argv) { |
| // First set the resolver type based off of --resolver |
| const char* resolver_type = nullptr; |
| gpr_cmdline* cl = gpr_cmdline_create("resolve address test"); |
| gpr_cmdline_add_string(cl, "resolver", "Resolver type (ares or native)", |
| &resolver_type); |
| // In case that there are more than one argument on the command line, |
| // --resolver will always be the first one, so only parse the first argument |
| // (other arguments may be unknown to cl) |
| gpr_cmdline_parse(cl, argc > 2 ? 2 : argc, argv); |
| grpc_core::UniquePtr<char> resolver = |
| GPR_GLOBAL_CONFIG_GET(grpc_dns_resolver); |
| if (strlen(resolver.get()) != 0) { |
| gpr_log(GPR_INFO, "Warning: overriding resolver setting of %s", |
| resolver.get()); |
| } |
| if (resolver_type != nullptr && gpr_stricmp(resolver_type, "native") == 0) { |
| GPR_GLOBAL_CONFIG_SET(grpc_dns_resolver, "native"); |
| } else if (resolver_type != nullptr && |
| gpr_stricmp(resolver_type, "ares") == 0) { |
| GPR_GLOBAL_CONFIG_SET(grpc_dns_resolver, "ares"); |
| } else { |
| gpr_log(GPR_ERROR, "--resolver_type was not set to ares or native"); |
| abort(); |
| } |
| grpc::testing::TestEnvironment env(argc, argv); |
| grpc_init(); |
| |
| { |
| grpc_core::ExecCtx exec_ctx; |
| test_named_and_numeric_scope_ids(); |
| // 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). |
| grpc_core::UniquePtr<char> resolver = |
| GPR_GLOBAL_CONFIG_GET(grpc_dns_resolver); |
| } |
| gpr_cmdline_destroy(cl); |
| |
| grpc_shutdown(); |
| return 0; |
| } |