mirror of https://github.com/grpc/grpc.git
murgatroid99
6 years ago
parent
751e5375b0
commit
41871bf7de
20 changed files with 282 additions and 9 deletions
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/*
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* |
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* Copyright 2019 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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#include <grpc/support/port_platform.h> |
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#include "src/core/lib/iomgr/port.h" |
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#if GRPC_ARES == 1 && defined(GRPC_UV) |
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#include <ares.h> |
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#include <uv.h> |
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#include "src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h" |
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#include <grpc/support/alloc.h> |
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#include <grpc/support/log.h> |
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#include <grpc/support/string_util.h> |
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#include <grpc/support/time.h> |
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#include "src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h" |
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#include "src/core/lib/gpr/string.h" |
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namespace grpc_core { |
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void ares_uv_poll_cb(uv_poll_t* handle, int status, int events); |
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void ares_uv_poll_close_cb(uv_handle_t *handle) { |
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delete handle; |
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} |
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class GrpcPolledFdLibuv : public GrpcPolledFd { |
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public: |
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GrpcPolledFdLibuv(ares_socket_t as): as_(as) { |
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gpr_asprintf(&name_, "c-ares socket: %" PRIdPTR, (intptr_t)as); |
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handle_ = new uv_poll_t; |
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uv_poll_init_socket(uv_default_loop(), handle_, as); |
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handle_->data = this; |
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} |
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~GrpcPolledFdLibuv() { |
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gpr_free(name_); |
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} |
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void RegisterForOnReadableLocked(grpc_closure* read_closure) override { |
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GPR_ASSERT(read_closure_ == nullptr); |
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GPR_ASSERT((poll_events_ & UV_READABLE) == 0); |
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read_closure_ = read_closure; |
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poll_events_ |= UV_READABLE; |
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uv_poll_start(handle_, poll_events_, ares_uv_poll_cb); |
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} |
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void RegisterForOnWriteableLocked(grpc_closure* write_closure) override { |
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GPR_ASSERT(write_closure_ == nullptr); |
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GPR_ASSERT((poll_events_ & UV_WRITABLE) == 0); |
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write_closure_ = write_closure; |
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poll_events_ |= UV_WRITABLE; |
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uv_poll_start(handle_, poll_events_, ares_uv_poll_cb); |
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} |
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bool IsFdStillReadableLocked() override { |
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/* uv_poll_t is based on poll, which is level triggered. So, if cares
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* leaves some data unread, the event will trigger again. */ |
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return false; |
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} |
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void ShutdownLocked(grpc_error* error) override { |
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uv_poll_stop(handle_); |
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uv_close(reinterpret_cast<uv_handle_t*>(handle_), ares_uv_poll_close_cb); |
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} |
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ares_socket_t GetWrappedAresSocketLocked() override { return as_; } |
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const char* GetName() override { return name_; } |
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char* name_; |
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ares_socket_t as_; |
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uv_poll_t* handle_; |
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grpc_closure* read_closure_ = nullptr; |
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grpc_closure* write_closure_ = nullptr; |
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int poll_events_ = 0; |
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}; |
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void ares_uv_poll_cb(uv_poll_t* handle, int status, int events) { |
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grpc_core::ExecCtx exec_ctx; |
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GrpcPolledFdLibuv* polled_fd = reinterpret_cast<GrpcPolledFdLibuv*>(handle->data); |
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grpc_error *error = GRPC_ERROR_NONE; |
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if (status < 0) { |
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error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("cares polling error"); |
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error = grpc_error_set_str(error, GRPC_ERROR_STR_OS_ERROR, |
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grpc_slice_from_static_string(uv_strerror(status))); |
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} |
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if ((events & UV_READABLE) && polled_fd->read_closure_) { |
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GRPC_CLOSURE_SCHED(polled_fd->read_closure_, error); |
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polled_fd->read_closure_ = nullptr; |
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polled_fd->poll_events_ &= ~UV_READABLE; |
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} |
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if ((events & UV_WRITABLE) && polled_fd->write_closure_) { |
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GRPC_CLOSURE_SCHED(polled_fd->write_closure_, error); |
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polled_fd->write_closure_ = nullptr; |
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polled_fd->poll_events_ &= ~UV_WRITABLE; |
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} |
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uv_poll_start(handle, polled_fd->poll_events_, ares_uv_poll_cb); |
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} |
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class GrpcPolledFdFactoryLibuv : public GrpcPolledFdFactory { |
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public: |
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GrpcPolledFd* NewGrpcPolledFdLocked(ares_socket_t as, |
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grpc_pollset_set* driver_pollset_set, |
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grpc_combiner* combiner) override { |
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return New<GrpcPolledFdLibuv>(as); |
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} |
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void ConfigureAresChannelLocked(ares_channel channel) override {} |
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}; |
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UniquePtr<GrpcPolledFdFactory> NewGrpcPolledFdFactory(grpc_combiner* combiner) { |
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return UniquePtr<GrpcPolledFdFactory>(New<GrpcPolledFdFactoryLibuv>()); |
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} |
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} // namespace grpc_core
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#endif /* GRPC_ARES == 1 && defined(GRPC_UV) */ |
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@ -0,0 +1,103 @@ |
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/*
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* |
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* Copyright 2016 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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#include <grpc/support/port_platform.h> |
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#include "src/core/lib/iomgr/port.h" |
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#if GRPC_ARES == 1 && defined(GRPC_UV) |
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#include <grpc/support/string_util.h> |
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#include "src/core/ext/filters/client_channel/parse_address.h" |
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#include "src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h" |
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#include "src/core/ext/filters/client_channel/server_address.h" |
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#include "src/core/lib/gpr/host_port.h" |
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#include "src/core/lib/gpr/string.h" |
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bool grpc_ares_query_ipv6() {
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/* The libuv grpc code currently does not have the code to probe for this,
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* so we assume for nowthat IPv6 is always available in contexts where this |
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* code will be used. */ |
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return true;
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} |
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/* The following two functions were copied entirely from the Windows file. This
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* code can run on Windows so it can have the same problem. */ |
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static bool inner_maybe_resolve_localhost_manually_locked( |
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const char* name, const char* default_port, |
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grpc_core::UniquePtr<grpc_core::ServerAddressList>* addrs, char** host, |
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char** port) { |
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gpr_split_host_port(name, host, port); |
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if (*host == nullptr) { |
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gpr_log(GPR_ERROR, |
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"Failed to parse %s into host:port during Windows localhost " |
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"resolution check.", |
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name); |
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return false; |
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} |
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if (*port == nullptr) { |
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if (default_port == nullptr) { |
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gpr_log(GPR_ERROR, |
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"No port or default port for %s during Windows localhost " |
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"resolution check.", |
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name); |
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return false; |
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} |
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*port = gpr_strdup(default_port); |
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} |
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if (gpr_stricmp(*host, "localhost") == 0) { |
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GPR_ASSERT(*addrs == nullptr); |
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*addrs = grpc_core::MakeUnique<grpc_core::ServerAddressList>(); |
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uint16_t numeric_port = grpc_strhtons(*port); |
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// Append the ipv6 loopback address.
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struct sockaddr_in6 ipv6_loopback_addr; |
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memset(&ipv6_loopback_addr, 0, sizeof(ipv6_loopback_addr)); |
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((char*)&ipv6_loopback_addr.sin6_addr)[15] = 1; |
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ipv6_loopback_addr.sin6_family = AF_INET6; |
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ipv6_loopback_addr.sin6_port = numeric_port; |
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(*addrs)->emplace_back(&ipv6_loopback_addr, sizeof(ipv6_loopback_addr), |
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nullptr /* args */); |
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// Append the ipv4 loopback address.
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struct sockaddr_in ipv4_loopback_addr; |
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memset(&ipv4_loopback_addr, 0, sizeof(ipv4_loopback_addr)); |
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((char*)&ipv4_loopback_addr.sin_addr)[0] = 0x7f; |
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((char*)&ipv4_loopback_addr.sin_addr)[3] = 0x01; |
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ipv4_loopback_addr.sin_family = AF_INET; |
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ipv4_loopback_addr.sin_port = numeric_port; |
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(*addrs)->emplace_back(&ipv4_loopback_addr, sizeof(ipv4_loopback_addr), |
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nullptr /* args */); |
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// Let the address sorter figure out which one should be tried first.
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grpc_cares_wrapper_address_sorting_sort(addrs->get()); |
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return true; |
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} |
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return false; |
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} |
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bool grpc_ares_maybe_resolve_localhost_manually_locked( |
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const char* name, const char* default_port, |
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grpc_core::UniquePtr<grpc_core::ServerAddressList>* addrs) { |
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char* host = nullptr; |
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char* port = nullptr; |
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bool out = inner_maybe_resolve_localhost_manually_locked(name, default_port, |
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addrs, &host, &port); |
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gpr_free(host); |
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gpr_free(port); |
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return out; |
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} |
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#endif /* GRPC_ARES == 1 && defined(GRPC_UV) */ |
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