| /* |
| * |
| * 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 "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 <grpc/support/useful.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(grpc_exec_ctx *exec_ctx, |
| async_connect *ac, |
| grpc_winsocket *socket) { |
| int done = (--ac->refs == 0); |
| gpr_mu_unlock(&ac->mu); |
| if (done) { |
| grpc_channel_args_destroy(exec_ctx, 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(grpc_exec_ctx *exec_ctx, 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(exec_ctx, ac, socket); |
| } |
| |
| static void on_connect(grpc_exec_ctx *exec_ctx, 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(exec_ctx, &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"); |
| } else { |
| *ep = |
| grpc_tcp_create(exec_ctx, 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(exec_ctx, ac, socket); |
| /* If the connection was aborted, the callback was already called when |
| the deadline was met. */ |
| GRPC_CLOSURE_SCHED(exec_ctx, 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_client_connect_impl( |
| grpc_exec_ctx *exec_ctx, 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, (struct 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, (struct 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(exec_ctx, &ac->alarm, deadline, &ac->on_alarm); |
| grpc_socket_notify_on_write(exec_ctx, 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(exec_ctx, on_done, final_error); |
| } |
| |
| // overridden by api_fuzzer.c |
| extern "C" { |
| void (*grpc_tcp_client_connect_impl)( |
| grpc_exec_ctx *exec_ctx, grpc_closure *closure, grpc_endpoint **ep, |
| grpc_pollset_set *interested_parties, const grpc_channel_args *channel_args, |
| const grpc_resolved_address *addr, |
| grpc_millis deadline) = tcp_client_connect_impl; |
| } |
| |
| void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure, |
| grpc_endpoint **ep, |
| grpc_pollset_set *interested_parties, |
| const grpc_channel_args *channel_args, |
| const grpc_resolved_address *addr, |
| grpc_millis deadline) { |
| grpc_tcp_client_connect_impl(exec_ctx, closure, ep, interested_parties, |
| channel_args, addr, deadline); |
| } |
| |
| #endif /* GRPC_WINSOCK_SOCKET */ |