| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include <grpc/support/port_platform.h> |
| |
| #ifdef GPR_WINSOCK_SOCKET |
| |
| #include "src/core/lib/iomgr/sockaddr_windows.h" |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/log_windows.h> |
| #include <grpc/support/slice_buffer.h> |
| #include <grpc/support/useful.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; |
| gpr_timespec deadline; |
| grpc_timer alarm; |
| char *addr_name; |
| int refs; |
| grpc_closure on_connect; |
| grpc_endpoint **endpoint; |
| } async_connect; |
| |
| static void async_connect_unlock_and_cleanup(async_connect *ac) { |
| int done = (--ac->refs == 0); |
| gpr_mu_unlock(&ac->mu); |
| if (done) { |
| if (ac->socket != NULL) grpc_winsocket_destroy(ac->socket); |
| gpr_mu_destroy(&ac->mu); |
| gpr_free(ac->addr_name); |
| gpr_free(ac); |
| } |
| } |
| |
| static void on_alarm(grpc_exec_ctx *exec_ctx, void *acp, bool occured) { |
| async_connect *ac = acp; |
| gpr_mu_lock(&ac->mu); |
| /* If the alarm didn't occur, it got cancelled. */ |
| if (ac->socket != NULL && occured) { |
| grpc_winsocket_shutdown(ac->socket); |
| } |
| async_connect_unlock_and_cleanup(ac); |
| } |
| |
| static void on_connect(grpc_exec_ctx *exec_ctx, void *acp, bool from_iocp) { |
| async_connect *ac = acp; |
| SOCKET sock = ac->socket->socket; |
| grpc_endpoint **ep = ac->endpoint; |
| grpc_winsocket_callback_info *info = &ac->socket->write_info; |
| grpc_closure *on_done = ac->on_done; |
| |
| grpc_timer_cancel(exec_ctx, &ac->alarm); |
| |
| gpr_mu_lock(&ac->mu); |
| |
| if (from_iocp) { |
| DWORD transfered_bytes = 0; |
| DWORD flags; |
| BOOL wsa_success = WSAGetOverlappedResult(sock, &info->overlapped, |
| &transfered_bytes, FALSE, &flags); |
| GPR_ASSERT(transfered_bytes == 0); |
| if (!wsa_success) { |
| char *utf8_message = gpr_format_message(WSAGetLastError()); |
| gpr_log(GPR_ERROR, "on_connect error connecting to '%s': %s", |
| ac->addr_name, utf8_message); |
| gpr_free(utf8_message); |
| } else { |
| *ep = grpc_tcp_create(ac->socket, ac->addr_name); |
| ac->socket = NULL; |
| } |
| } |
| |
| async_connect_unlock_and_cleanup(ac); |
| /* If the connection was aborted, the callback was already called when |
| the deadline was met. */ |
| on_done->cb(exec_ctx, on_done->cb_arg, *ep != NULL); |
| } |
| |
| /* Tries to issue one async connection, then schedules both an IOCP |
| notification request for the connection, and one timeout alert. */ |
| void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *on_done, |
| grpc_endpoint **endpoint, |
| grpc_pollset_set *interested_parties, |
| const struct sockaddr *addr, size_t addr_len, |
| gpr_timespec deadline) { |
| SOCKET sock = INVALID_SOCKET; |
| BOOL success; |
| int status; |
| struct sockaddr_in6 addr6_v4mapped; |
| struct sockaddr_in6 local_address; |
| async_connect *ac; |
| grpc_winsocket *socket = NULL; |
| LPFN_CONNECTEX ConnectEx; |
| GUID guid = WSAID_CONNECTEX; |
| DWORD ioctl_num_bytes; |
| const char *message = NULL; |
| char *utf8_message; |
| grpc_winsocket_callback_info *info; |
| |
| *endpoint = NULL; |
| |
| /* Use dualstack sockets where available. */ |
| if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) { |
| addr = (const struct sockaddr *)&addr6_v4mapped; |
| addr_len = sizeof(addr6_v4mapped); |
| } |
| |
| sock = WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, NULL, 0, |
| WSA_FLAG_OVERLAPPED); |
| if (sock == INVALID_SOCKET) { |
| message = "Unable to create socket: %s"; |
| goto failure; |
| } |
| |
| if (!grpc_tcp_prepare_socket(sock)) { |
| message = "Unable to set socket options: %s"; |
| 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) { |
| message = "Unable to retrieve ConnectEx pointer: %s"; |
| goto failure; |
| } |
| |
| grpc_sockaddr_make_wildcard6(0, &local_address); |
| |
| status = bind(sock, (struct sockaddr *)&local_address, sizeof(local_address)); |
| if (status != 0) { |
| message = "Unable to bind socket: %s"; |
| goto failure; |
| } |
| |
| socket = grpc_winsocket_create(sock, "client"); |
| info = &socket->write_info; |
| success = |
| ConnectEx(sock, 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 error = WSAGetLastError(); |
| if (error != ERROR_IO_PENDING) { |
| message = "ConnectEx failed: %s"; |
| goto failure; |
| } |
| } |
| |
| ac = 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; |
| grpc_closure_init(&ac->on_connect, on_connect, ac); |
| |
| grpc_timer_init(exec_ctx, &ac->alarm, deadline, on_alarm, ac, |
| gpr_now(GPR_CLOCK_MONOTONIC)); |
| grpc_socket_notify_on_write(exec_ctx, socket, &ac->on_connect); |
| return; |
| |
| failure: |
| utf8_message = gpr_format_message(WSAGetLastError()); |
| gpr_log(GPR_ERROR, message, utf8_message); |
| gpr_free(utf8_message); |
| if (socket != NULL) { |
| grpc_winsocket_destroy(socket); |
| } else if (sock != INVALID_SOCKET) { |
| closesocket(sock); |
| } |
| grpc_exec_ctx_enqueue(exec_ctx, on_done, false, NULL); |
| } |
| |
| #endif /* GPR_WINSOCK_SOCKET */ |