| /* |
| * |
| * Copyright 2015 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 <grpc/support/port_platform.h> |
| |
| #include "src/core/lib/iomgr/port.h" |
| |
| #include <inttypes.h> |
| |
| #ifdef GRPC_WINSOCK_SOCKET |
| |
| #include "src/core/lib/iomgr/sockaddr_windows.h" |
| |
| #include <grpc/slice_buffer.h> |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/log_windows.h> |
| |
| #include "src/core/lib/channel/channel_args.h" |
| #include "src/core/lib/iomgr/iocp_windows.h" |
| #include "src/core/lib/iomgr/sockaddr.h" |
| #include "src/core/lib/iomgr/sockaddr_utils.h" |
| #include "src/core/lib/iomgr/socket_windows.h" |
| #include "src/core/lib/iomgr/tcp_client.h" |
| #include "src/core/lib/iomgr/tcp_windows.h" |
| #include "src/core/lib/iomgr/timer.h" |
| |
| typedef struct { |
| grpc_closure* on_done; |
| gpr_mu mu; |
| grpc_winsocket* socket; |
| grpc_timer alarm; |
| grpc_closure on_alarm; |
| char* addr_name; |
| int refs; |
| grpc_closure on_connect; |
| grpc_endpoint** endpoint; |
| grpc_channel_args* channel_args; |
| } async_connect; |
| |
| static void async_connect_unlock_and_cleanup(async_connect* ac, |
| grpc_winsocket* socket) { |
| int done = (--ac->refs == 0); |
| gpr_mu_unlock(&ac->mu); |
| if (done) { |
| grpc_channel_args_destroy(ac->channel_args); |
| gpr_mu_destroy(&ac->mu); |
| gpr_free(ac->addr_name); |
| gpr_free(ac); |
| } |
| if (socket != NULL) grpc_winsocket_destroy(socket); |
| } |
| |
| static void on_alarm(void* acp, grpc_error* error) { |
| async_connect* ac = (async_connect*)acp; |
| gpr_mu_lock(&ac->mu); |
| grpc_winsocket* socket = ac->socket; |
| ac->socket = NULL; |
| if (socket != NULL) { |
| grpc_winsocket_shutdown(socket); |
| } |
| async_connect_unlock_and_cleanup(ac, socket); |
| } |
| |
| static void on_connect(void* acp, grpc_error* error) { |
| async_connect* ac = (async_connect*)acp; |
| grpc_endpoint** ep = ac->endpoint; |
| GPR_ASSERT(*ep == NULL); |
| grpc_closure* on_done = ac->on_done; |
| |
| GRPC_ERROR_REF(error); |
| |
| gpr_mu_lock(&ac->mu); |
| grpc_winsocket* socket = ac->socket; |
| ac->socket = NULL; |
| gpr_mu_unlock(&ac->mu); |
| |
| grpc_timer_cancel(&ac->alarm); |
| |
| gpr_mu_lock(&ac->mu); |
| |
| if (error == GRPC_ERROR_NONE) { |
| if (socket != NULL) { |
| DWORD transfered_bytes = 0; |
| DWORD flags; |
| BOOL wsa_success = |
| WSAGetOverlappedResult(socket->socket, &socket->write_info.overlapped, |
| &transfered_bytes, FALSE, &flags); |
| GPR_ASSERT(transfered_bytes == 0); |
| if (!wsa_success) { |
| error = GRPC_WSA_ERROR(WSAGetLastError(), "ConnectEx"); |
| closesocket(socket->socket); |
| } else { |
| *ep = grpc_tcp_create(socket, ac->channel_args, ac->addr_name); |
| socket = NULL; |
| } |
| } else { |
| error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("socket is null"); |
| } |
| } |
| |
| async_connect_unlock_and_cleanup(ac, socket); |
| /* If the connection was aborted, the callback was already called when |
| the deadline was met. */ |
| GRPC_CLOSURE_SCHED(on_done, error); |
| } |
| |
| /* Tries to issue one async connection, then schedules both an IOCP |
| notification request for the connection, and one timeout alert. */ |
| static void tcp_connect(grpc_closure* on_done, grpc_endpoint** endpoint, |
| grpc_pollset_set* interested_parties, |
| const grpc_channel_args* channel_args, |
| const grpc_resolved_address* addr, |
| grpc_millis deadline) { |
| SOCKET sock = INVALID_SOCKET; |
| BOOL success; |
| int status; |
| grpc_resolved_address addr6_v4mapped; |
| grpc_resolved_address local_address; |
| async_connect* ac; |
| grpc_winsocket* socket = NULL; |
| LPFN_CONNECTEX ConnectEx; |
| GUID guid = WSAID_CONNECTEX; |
| DWORD ioctl_num_bytes; |
| grpc_winsocket_callback_info* info; |
| grpc_error* error = GRPC_ERROR_NONE; |
| |
| *endpoint = NULL; |
| |
| /* Use dualstack sockets where available. */ |
| if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) { |
| addr = &addr6_v4mapped; |
| } |
| |
| sock = WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, NULL, 0, |
| WSA_FLAG_OVERLAPPED); |
| if (sock == INVALID_SOCKET) { |
| error = GRPC_WSA_ERROR(WSAGetLastError(), "WSASocket"); |
| goto failure; |
| } |
| |
| error = grpc_tcp_prepare_socket(sock); |
| if (error != GRPC_ERROR_NONE) { |
| goto failure; |
| } |
| |
| /* Grab the function pointer for ConnectEx for that specific socket. |
| It may change depending on the interface. */ |
| status = |
| WSAIoctl(sock, SIO_GET_EXTENSION_FUNCTION_POINTER, &guid, sizeof(guid), |
| &ConnectEx, sizeof(ConnectEx), &ioctl_num_bytes, NULL, NULL); |
| |
| if (status != 0) { |
| error = GRPC_WSA_ERROR(WSAGetLastError(), |
| "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER)"); |
| goto failure; |
| } |
| |
| grpc_sockaddr_make_wildcard6(0, &local_address); |
| |
| status = |
| bind(sock, (grpc_sockaddr*)&local_address.addr, (int)local_address.len); |
| if (status != 0) { |
| error = GRPC_WSA_ERROR(WSAGetLastError(), "bind"); |
| goto failure; |
| } |
| |
| socket = grpc_winsocket_create(sock, "client"); |
| info = &socket->write_info; |
| success = ConnectEx(sock, (grpc_sockaddr*)&addr->addr, (int)addr->len, NULL, |
| 0, NULL, &info->overlapped); |
| |
| /* It wouldn't be unusual to get a success immediately. But we'll still get |
| an IOCP notification, so let's ignore it. */ |
| if (!success) { |
| int last_error = WSAGetLastError(); |
| if (last_error != ERROR_IO_PENDING) { |
| error = GRPC_WSA_ERROR(last_error, "ConnectEx"); |
| goto failure; |
| } |
| } |
| |
| ac = (async_connect*)gpr_malloc(sizeof(async_connect)); |
| ac->on_done = on_done; |
| ac->socket = socket; |
| gpr_mu_init(&ac->mu); |
| ac->refs = 2; |
| ac->addr_name = grpc_sockaddr_to_uri(addr); |
| ac->endpoint = endpoint; |
| ac->channel_args = grpc_channel_args_copy(channel_args); |
| GRPC_CLOSURE_INIT(&ac->on_connect, on_connect, ac, grpc_schedule_on_exec_ctx); |
| |
| GRPC_CLOSURE_INIT(&ac->on_alarm, on_alarm, ac, grpc_schedule_on_exec_ctx); |
| grpc_timer_init(&ac->alarm, deadline, &ac->on_alarm); |
| grpc_socket_notify_on_write(socket, &ac->on_connect); |
| return; |
| |
| failure: |
| GPR_ASSERT(error != GRPC_ERROR_NONE); |
| char* target_uri = grpc_sockaddr_to_uri(addr); |
| grpc_error* final_error = grpc_error_set_str( |
| GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING("Failed to connect", |
| &error, 1), |
| GRPC_ERROR_STR_TARGET_ADDRESS, grpc_slice_from_copied_string(target_uri)); |
| GRPC_ERROR_UNREF(error); |
| if (socket != NULL) { |
| grpc_winsocket_destroy(socket); |
| } else if (sock != INVALID_SOCKET) { |
| closesocket(sock); |
| } |
| GRPC_CLOSURE_SCHED(on_done, final_error); |
| } |
| |
| grpc_tcp_client_vtable grpc_windows_tcp_client_vtable = {tcp_connect}; |
| |
| #endif /* GRPC_WINSOCK_SOCKET */ |