/**
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* \file
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* Windows specific socket code.
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*
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* Copyright 2016 Microsoft
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* Licensed under the MIT license. See LICENSE file in the project root for full license information.
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*/
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#include <config.h>
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#include <glib.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ws2tcpip.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <errno.h>
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#include <sys/types.h>
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#include "w32socket.h"
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#include "w32socket-internals.h"
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#include "utils/w32api.h"
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#include "utils/mono-os-wait.h"
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#define LOGDEBUG(...)
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void
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mono_w32socket_initialize (void)
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{
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}
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void
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mono_w32socket_cleanup (void)
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{
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}
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static gboolean set_blocking (SOCKET sock, gboolean block)
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{
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u_long non_block = block ? 0 : 1;
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return ioctlsocket (sock, FIONBIO, &non_block) != SOCKET_ERROR;
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}
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static DWORD get_socket_timeout (SOCKET sock, int optname)
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{
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DWORD timeout = 0;
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int optlen = sizeof (DWORD);
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if (getsockopt (sock, SOL_SOCKET, optname, (char *)&timeout, &optlen) == SOCKET_ERROR) {
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WSASetLastError (0);
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return WSA_INFINITE;
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}
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if (timeout == 0)
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timeout = WSA_INFINITE; // 0 means infinite
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return timeout;
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}
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/*
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* Performs an alertable wait for the specified event (FD_ACCEPT_BIT,
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* FD_CONNECT_BIT, FD_READ_BIT, FD_WRITE_BIT) on the specified socket.
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* Returns TRUE if the event is fired without errors. Calls WSASetLastError()
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* with WSAEINTR and returns FALSE if the thread is alerted. If the event is
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* fired but with an error WSASetLastError() is called to set the error and the
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* function returns FALSE.
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*/
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static gboolean alertable_socket_wait (SOCKET sock, int event_bit)
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{
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static char *EVENT_NAMES[] = { "FD_READ", "FD_WRITE", NULL /*FD_OOB*/, "FD_ACCEPT", "FD_CONNECT", "FD_CLOSE" };
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gboolean success = FALSE;
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int error = -1;
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DWORD timeout = WSA_INFINITE;
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if (event_bit == FD_READ_BIT || event_bit == FD_WRITE_BIT) {
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timeout = get_socket_timeout (sock, event_bit == FD_READ_BIT ? SO_RCVTIMEO : SO_SNDTIMEO);
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}
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WSASetLastError (0);
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WSAEVENT event = WSACreateEvent ();
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if (event != WSA_INVALID_EVENT) {
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if (WSAEventSelect (sock, event, (1 << event_bit) | FD_CLOSE) != SOCKET_ERROR) {
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LOGDEBUG (g_message ("%06d - Calling mono_win32_wsa_wait_for_multiple_events () on socket %d", GetCurrentThreadId (), sock));
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DWORD ret = mono_win32_wsa_wait_for_multiple_events (1, &event, TRUE, timeout, TRUE);
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if (ret == WSA_WAIT_IO_COMPLETION) {
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LOGDEBUG (g_message ("%06d - mono_win32_wsa_wait_for_multiple_events () returned WSA_WAIT_IO_COMPLETION for socket %d", GetCurrentThreadId (), sock));
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error = WSAEINTR;
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} else if (ret == WSA_WAIT_TIMEOUT) {
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error = WSAETIMEDOUT;
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} else {
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g_assert (ret == WSA_WAIT_EVENT_0);
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WSANETWORKEVENTS ne = { 0 };
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if (WSAEnumNetworkEvents (sock, event, &ne) != SOCKET_ERROR) {
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if (ne.lNetworkEvents & (1 << event_bit) && ne.iErrorCode[event_bit]) {
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LOGDEBUG (g_message ("%06d - %s error %d on socket %d", GetCurrentThreadId (), EVENT_NAMES[event_bit], ne.iErrorCode[event_bit], sock));
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error = ne.iErrorCode[event_bit];
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} else if (ne.lNetworkEvents & FD_CLOSE_BIT && ne.iErrorCode[FD_CLOSE_BIT]) {
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LOGDEBUG (g_message ("%06d - FD_CLOSE error %d on socket %d", GetCurrentThreadId (), ne.iErrorCode[FD_CLOSE_BIT], sock));
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error = ne.iErrorCode[FD_CLOSE_BIT];
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} else {
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LOGDEBUG (g_message ("%06d - WSAEnumNetworkEvents () finished successfully on socket %d", GetCurrentThreadId (), sock));
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success = TRUE;
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error = 0;
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}
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}
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}
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WSAEventSelect (sock, NULL, 0);
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}
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WSACloseEvent (event);
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}
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if (error != -1) {
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WSASetLastError (error);
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}
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return success;
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}
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#define ALERTABLE_SOCKET_CALL(event_bit, blocking, repeat, ret, op, sock, ...) \
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LOGDEBUG (g_message ("%06d - Performing %s " #op " () on socket %d", GetCurrentThreadId (), blocking ? "blocking" : "non-blocking", sock)); \
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if (blocking) { \
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if (set_blocking(sock, FALSE)) { \
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while (-1 == (int) (ret = op (sock, __VA_ARGS__))) { \
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int _error = WSAGetLastError ();\
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if (_error != WSAEWOULDBLOCK && _error != WSA_IO_PENDING) \
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break; \
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if (!alertable_socket_wait (sock, event_bit) || !repeat) \
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break; \
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} \
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int _saved_error = WSAGetLastError (); \
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set_blocking (sock, TRUE); \
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WSASetLastError (_saved_error); \
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} \
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} else { \
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ret = op (sock, __VA_ARGS__); \
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} \
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int _saved_error = WSAGetLastError (); \
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LOGDEBUG (g_message ("%06d - Finished %s " #op " () on socket %d (ret = %d, WSAGetLastError() = %d)", GetCurrentThreadId (), \
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blocking ? "blocking" : "non-blocking", sock, ret, _saved_error)); \
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WSASetLastError (_saved_error);
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SOCKET mono_w32socket_accept (SOCKET s, struct sockaddr *addr, socklen_t *addrlen, gboolean blocking)
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{
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SOCKET newsock = INVALID_SOCKET;
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MONO_ENTER_GC_SAFE;
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ALERTABLE_SOCKET_CALL (FD_ACCEPT_BIT, blocking, TRUE, newsock, accept, s, addr, addrlen);
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MONO_EXIT_GC_SAFE;
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return newsock;
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}
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int mono_w32socket_connect (SOCKET s, const struct sockaddr *name, int namelen, gboolean blocking)
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{
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int ret = SOCKET_ERROR;
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MONO_ENTER_GC_SAFE;
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ALERTABLE_SOCKET_CALL (FD_CONNECT_BIT, blocking, FALSE, ret, connect, s, name, namelen);
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ret = WSAGetLastError () != 0 ? SOCKET_ERROR : 0;
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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int mono_w32socket_recv (SOCKET s, char *buf, int len, int flags, gboolean blocking)
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{
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MonoInternalThread *curthread = mono_thread_internal_current ();
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int ret = SOCKET_ERROR;
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MONO_ENTER_GC_SAFE;
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ALERTABLE_SOCKET_CALL (FD_READ_BIT, blocking, TRUE, ret, recv, s, buf, len, flags);
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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int mono_w32socket_recvfrom (SOCKET s, char *buf, int len, int flags, struct sockaddr *from, socklen_t *fromlen, gboolean blocking)
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{
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int ret = SOCKET_ERROR;
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MONO_ENTER_GC_SAFE;
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ALERTABLE_SOCKET_CALL (FD_READ_BIT, blocking, TRUE, ret, recvfrom, s, buf, len, flags, from, fromlen);
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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int mono_w32socket_recvbuffers (SOCKET s, WSABUF *lpBuffers, guint32 dwBufferCount, guint32 *lpNumberOfBytesRecvd, guint32 *lpFlags, gpointer lpOverlapped, gpointer lpCompletionRoutine, gboolean blocking)
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{
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int ret = SOCKET_ERROR;
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MONO_ENTER_GC_SAFE;
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ALERTABLE_SOCKET_CALL (FD_READ_BIT, blocking, TRUE, ret, WSARecv, s, lpBuffers, dwBufferCount, lpNumberOfBytesRecvd, lpFlags, lpOverlapped, lpCompletionRoutine);
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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int mono_w32socket_send (SOCKET s, char *buf, int len, int flags, gboolean blocking)
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{
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int ret = SOCKET_ERROR;
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MONO_ENTER_GC_SAFE;
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ALERTABLE_SOCKET_CALL (FD_WRITE_BIT, blocking, TRUE, ret, send, s, buf, len, flags);
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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int mono_w32socket_sendto (SOCKET s, const char *buf, int len, int flags, const struct sockaddr *to, int tolen, gboolean blocking)
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{
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int ret = SOCKET_ERROR;
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MONO_ENTER_GC_SAFE;
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ALERTABLE_SOCKET_CALL (FD_WRITE_BIT, blocking, TRUE, ret, sendto, s, buf, len, flags, to, tolen);
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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int mono_w32socket_sendbuffers (SOCKET s, WSABUF *lpBuffers, guint32 dwBufferCount, guint32 *lpNumberOfBytesRecvd, guint32 lpFlags, gpointer lpOverlapped, gpointer lpCompletionRoutine, gboolean blocking)
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{
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int ret = SOCKET_ERROR;
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MONO_ENTER_GC_SAFE;
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ALERTABLE_SOCKET_CALL (FD_WRITE_BIT, blocking, TRUE, ret, WSASend, s, lpBuffers, dwBufferCount, lpNumberOfBytesRecvd, lpFlags, lpOverlapped, lpCompletionRoutine);
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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#if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT | HAVE_UWP_WINAPI_SUPPORT)
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BOOL mono_w32socket_transmit_file (SOCKET hSocket, gpointer hFile, TRANSMIT_FILE_BUFFERS *lpTransmitBuffers, guint32 dwReserved, gboolean blocking)
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{
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LOGDEBUG (g_message ("%06d - Performing %s TransmitFile () on socket %d", GetCurrentThreadId (), blocking ? "blocking" : "non-blocking", hSocket));
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int error = 0, ret;
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MONO_ENTER_GC_SAFE;
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if (blocking) {
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OVERLAPPED overlapped = { 0 };
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overlapped.hEvent = WSACreateEvent ();
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if (overlapped.hEvent == WSA_INVALID_EVENT) {
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ret = FALSE;
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goto done;
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}
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if (!TransmitFile (hSocket, hFile, 0, 0, &overlapped, lpTransmitBuffers, dwReserved)) {
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error = WSAGetLastError ();
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if (error == WSA_IO_PENDING) {
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error = 0;
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// NOTE: .NET's Socket.SendFile() doesn't honor the Socket's SendTimeout so we shouldn't either
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DWORD ret = mono_win32_wait_for_single_object_ex (overlapped.hEvent, INFINITE, TRUE);
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if (ret == WAIT_IO_COMPLETION) {
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LOGDEBUG (g_message ("%06d - mono_win32_wait_for_single_object_ex () returned WSA_WAIT_IO_COMPLETION for socket %d", GetCurrentThreadId (), hSocket));
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error = WSAEINTR;
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} else if (ret == WAIT_TIMEOUT) {
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error = WSAETIMEDOUT;
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} else if (ret != WAIT_OBJECT_0) {
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error = GetLastError ();
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}
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}
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}
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WSACloseEvent (overlapped.hEvent);
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} else {
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if (!TransmitFile (hSocket, hFile, 0, 0, NULL, lpTransmitBuffers, dwReserved)) {
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error = WSAGetLastError ();
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}
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}
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LOGDEBUG (g_message ("%06d - Finished %s TransmitFile () on socket %d (ret = %d, WSAGetLastError() = %d)", GetCurrentThreadId (), \
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blocking ? "blocking" : "non-blocking", hSocket, error == 0, error));
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WSASetLastError (error);
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ret = error == 0;
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done:
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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#endif /* #if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT | HAVE_UWP_WINAPI_SUPPORT) */
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#if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT | HAVE_UWP_WINAPI_SUPPORT)
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gint
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mono_w32socket_disconnect (SOCKET sock, gboolean reuse)
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{
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LPFN_DISCONNECTEX disconnect;
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LPFN_TRANSMITFILE transmit_file;
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DWORD output_bytes;
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gint ret;
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MONO_ENTER_GC_SAFE;
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/* Use the SIO_GET_EXTENSION_FUNCTION_POINTER to determine
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* the address of the disconnect method without taking
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* a hard dependency on a single provider
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*
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* For an explanation of why this is done, you can read the
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* article at http://www.codeproject.com/internet/jbsocketserver3.asp
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*
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* I _think_ the extension function pointers need to be looked
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* up for each socket.
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*
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* FIXME: check the best way to store pointers to functions in
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* managed objects that still works on 64bit platforms. */
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GUID disconnect_guid = WSAID_DISCONNECTEX;
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ret = WSAIoctl (sock, SIO_GET_EXTENSION_FUNCTION_POINTER, &disconnect_guid, sizeof (GUID), &disconnect, sizeof (LPFN_DISCONNECTEX), &output_bytes, NULL, NULL);
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if (ret == 0) {
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if (!disconnect (sock, NULL, reuse ? TF_REUSE_SOCKET : 0, 0)) {
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ret = WSAGetLastError ();
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goto done;
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}
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ret = 0;
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goto done;
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}
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GUID transmit_file_guid = WSAID_TRANSMITFILE;
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ret = WSAIoctl (sock, SIO_GET_EXTENSION_FUNCTION_POINTER, &transmit_file_guid, sizeof (GUID), &transmit_file, sizeof (LPFN_TRANSMITFILE), &output_bytes, NULL, NULL);
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if (ret == 0) {
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if (!transmit_file (sock, NULL, 0, 0, NULL, NULL, TF_DISCONNECT | (reuse ? TF_REUSE_SOCKET : 0))) {
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ret = WSAGetLastError ();
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goto done;
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}
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ret = 0;
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goto done;
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}
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ret = ERROR_NOT_SUPPORTED;
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done:
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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#endif /* #if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT | HAVE_UWP_WINAPI_SUPPORT) */
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gint
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mono_w32socket_set_blocking (SOCKET sock, gboolean blocking)
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{
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gint ret;
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gulong nonblocking_long = !blocking;
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MONO_ENTER_GC_SAFE;
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ret = ioctlsocket (sock, FIONBIO, &nonblocking_long);
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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gint
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mono_w32socket_get_available (SOCKET sock, guint64 *amount)
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{
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gint ret;
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u_long amount_long = 0;
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MONO_ENTER_GC_SAFE;
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ret = ioctlsocket (sock, FIONREAD, &amount_long);
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*amount = amount_long;
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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void
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mono_w32socket_set_last_error (gint32 error)
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{
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WSASetLastError (error);
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}
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gint32
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mono_w32socket_get_last_error (void)
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{
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return WSAGetLastError ();
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}
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gint32
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mono_w32socket_convert_error (gint error)
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{
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return (error > 0 && error < WSABASEERR) ? error + WSABASEERR : error;
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}
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gboolean
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ves_icall_System_Net_Sockets_Socket_SupportPortReuse (MonoProtocolType proto, MonoError *error)
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{
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error_init (error);
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return TRUE;
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}
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gboolean
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mono_w32socket_duplicate (gpointer handle, gint32 targetProcessId, gpointer *duplicate_handle)
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{
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gboolean ret;
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MONO_ENTER_GC_SAFE;
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ret = DuplicateHandle (GetCurrentProcess(), handle, GINT_TO_POINTER(targetProcessId), duplicate_handle, 0, 0, 0x00000002 /* DUPLICATE_SAME_ACCESS */);
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MONO_EXIT_GC_SAFE;
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return ret;
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}
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