| /* |
| * |
| * 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/iomgr/sockaddr_win32.h" |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/log_win32.h> |
| #include <grpc/support/slice_buffer.h> |
| #include <grpc/support/useful.h> |
| |
| #include "src/core/iomgr/alarm.h" |
| #include "src/core/iomgr/iocp_windows.h" |
| #include "src/core/iomgr/tcp_client.h" |
| #include "src/core/iomgr/tcp_windows.h" |
| #include "src/core/iomgr/sockaddr.h" |
| #include "src/core/iomgr/sockaddr_utils.h" |
| #include "src/core/iomgr/socket_windows.h" |
| |
| typedef struct { |
| void(*cb)(void *arg, grpc_endpoint *tcp); |
| void *cb_arg; |
| gpr_mu mu; |
| grpc_winsocket *socket; |
| gpr_timespec deadline; |
| grpc_alarm alarm; |
| int refs; |
| int aborted; |
| } async_connect; |
| |
| static void async_connect_cleanup(async_connect *ac) { |
| int done = (--ac->refs == 0); |
| gpr_mu_unlock(&ac->mu); |
| if (done) { |
| gpr_mu_destroy(&ac->mu); |
| gpr_free(ac); |
| } |
| } |
| |
| static void on_alarm(void *acp, int 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_cleanup(ac); |
| } |
| |
| static void on_connect(void *acp, int from_iocp) { |
| async_connect *ac = acp; |
| SOCKET sock = ac->socket->socket; |
| grpc_endpoint *ep = NULL; |
| grpc_winsocket_callback_info *info = &ac->socket->write_info; |
| void(*cb)(void *arg, grpc_endpoint *tcp) = ac->cb; |
| void *cb_arg = ac->cb_arg; |
| int aborted; |
| |
| grpc_alarm_cancel(&ac->alarm); |
| |
| gpr_mu_lock(&ac->mu); |
| aborted = ac->aborted; |
| |
| if (from_iocp) { |
| DWORD transfered_bytes = 0; |
| DWORD flags; |
| info->outstanding = 0; |
| 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: %s", utf8_message); |
| gpr_free(utf8_message); |
| } else if (!aborted) { |
| ep = grpc_tcp_create(ac->socket); |
| } |
| } else { |
| gpr_log(GPR_ERROR, "on_connect is shutting down"); |
| /* If the connection timeouts, we will still get a notification from |
| the IOCP whatever happens. So we're just going to flag that connection |
| as being in the process of being aborted, and wait for the IOCP. We |
| can't just orphan the socket now, because the IOCP might already have |
| gotten a successful connection, which is our worst-case scenario. |
| We need to call our callback now to respect the deadline. */ |
| ac->aborted = 1; |
| gpr_mu_unlock(&ac->mu); |
| cb(cb_arg, NULL); |
| return; |
| } |
| |
| ac->socket->write_info.outstanding = 0; |
| |
| /* If we don't have an endpoint, it means the connection failed, |
| so it doesn't matter if it aborted or failed. We need to orphan |
| that socket. */ |
| if (!ep || aborted) grpc_winsocket_orphan(ac->socket); |
| async_connect_cleanup(ac); |
| /* If the connection was aborted, the callback was already called when |
| the deadline was met. */ |
| if (!aborted) cb(cb_arg, ep); |
| } |
| |
| /* 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(void(*cb)(void *arg, grpc_endpoint *tcp), |
| void *arg, const struct sockaddr *addr, |
| int 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; |
| |
| /* 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); |
| info = &socket->write_info; |
| info->outstanding = 1; |
| success = ConnectEx(sock, addr, 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->cb = cb; |
| ac->cb_arg = arg; |
| ac->socket = socket; |
| gpr_mu_init(&ac->mu); |
| ac->refs = 2; |
| ac->aborted = 0; |
| |
| grpc_alarm_init(&ac->alarm, deadline, on_alarm, ac, gpr_now()); |
| socket->write_info.outstanding = 1; |
| grpc_socket_notify_on_write(socket, on_connect, ac); |
| return; |
| |
| failure: |
| utf8_message = gpr_format_message(WSAGetLastError()); |
| gpr_log(GPR_ERROR, message, utf8_message); |
| gpr_free(utf8_message); |
| if (socket) { |
| grpc_winsocket_orphan(socket); |
| } else if (sock != INVALID_SOCKET) { |
| closesocket(sock); |
| } |
| cb(arg, NULL); |
| } |
| |
| #endif /* GPR_WINSOCK_SOCKET */ |