/* $Id: VDIfTcpNet.cpp $ */ /** @file * VD - Virtual disk container implementation, Default TCP/IP interface implementation. */ /* * Copyright (C) 2019-2022 Oracle and/or its affiliates. * * This file is part of VirtualBox base platform packages, as * available from https://www.virtualbox.org. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, in version 3 of the * License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . * * SPDX-License-Identifier: GPL-3.0-only */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #include #include #include #include #include #include #include #include #include /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ /** Pollset id of the socket. */ #define VDSOCKET_POLL_ID_SOCKET 0 /** Pollset id of the pipe. */ #define VDSOCKET_POLL_ID_PIPE 1 /********************************************************************************************************************************* * Structures and Typedefs * *********************************************************************************************************************************/ /** * Socket data. */ typedef struct VDSOCKETINT { /** IPRT socket handle. */ RTSOCKET hSocket; /** Pollset with the wakeup pipe and socket. */ RTPOLLSET hPollSet; /** Pipe endpoint - read (in the pollset). */ RTPIPE hPipeR; /** Pipe endpoint - write. */ RTPIPE hPipeW; /** Flag whether the thread was woken up. */ volatile bool fWokenUp; /** Flag whether the thread is waiting in the select call. */ volatile bool fWaiting; /** Old event mask. */ uint32_t fEventsOld; } VDSOCKETINT, *PVDSOCKETINT; /** * VD TCP/NET interface instance data. */ typedef struct VDIFINSTINT { /** The TCP/NET interface descriptor. */ VDINTERFACETCPNET VdIfTcpNet; } VDIFINSTINT; /** Pointer to the VD TCP/NET interface instance data. */ typedef VDIFINSTINT *PVDIFINSTINT; /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ /** @interface_method_impl{VDINTERFACETCPNET,pfnSocketCreate} */ static DECLCALLBACK(int) vdIfTcpNetSocketCreate(uint32_t fFlags, PVDSOCKET phVdSock) { int rc = VINF_SUCCESS; int rc2 = VINF_SUCCESS; PVDSOCKETINT pSockInt = NULL; pSockInt = (PVDSOCKETINT)RTMemAllocZ(sizeof(VDSOCKETINT)); if (!pSockInt) return VERR_NO_MEMORY; pSockInt->hSocket = NIL_RTSOCKET; pSockInt->hPollSet = NIL_RTPOLLSET; pSockInt->hPipeR = NIL_RTPIPE; pSockInt->hPipeW = NIL_RTPIPE; pSockInt->fWokenUp = false; pSockInt->fWaiting = false; if (fFlags & VD_INTERFACETCPNET_CONNECT_EXTENDED_SELECT) { /* Init pipe and pollset. */ rc = RTPipeCreate(&pSockInt->hPipeR, &pSockInt->hPipeW, 0); if (RT_SUCCESS(rc)) { rc = RTPollSetCreate(&pSockInt->hPollSet); if (RT_SUCCESS(rc)) { rc = RTPollSetAddPipe(pSockInt->hPollSet, pSockInt->hPipeR, RTPOLL_EVT_READ, VDSOCKET_POLL_ID_PIPE); if (RT_SUCCESS(rc)) { *phVdSock = pSockInt; return VINF_SUCCESS; } RTPollSetRemove(pSockInt->hPollSet, VDSOCKET_POLL_ID_PIPE); rc2 = RTPollSetDestroy(pSockInt->hPollSet); AssertRC(rc2); } rc2 = RTPipeClose(pSockInt->hPipeR); AssertRC(rc2); rc2 = RTPipeClose(pSockInt->hPipeW); AssertRC(rc2); } } else { *phVdSock = pSockInt; return VINF_SUCCESS; } RTMemFree(pSockInt); return rc; } /** @interface_method_impl{VDINTERFACETCPNET,pfnSocketDestroy} */ static DECLCALLBACK(int) vdIfTcpNetSocketDestroy(VDSOCKET hVdSock) { int rc = VINF_SUCCESS; PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; /* Destroy the pipe and pollset if necessary. */ if (pSockInt->hPollSet != NIL_RTPOLLSET) { if (pSockInt->hSocket != NIL_RTSOCKET) { rc = RTPollSetRemove(pSockInt->hPollSet, VDSOCKET_POLL_ID_SOCKET); Assert(RT_SUCCESS(rc) || rc == VERR_POLL_HANDLE_ID_NOT_FOUND); } rc = RTPollSetRemove(pSockInt->hPollSet, VDSOCKET_POLL_ID_PIPE); AssertRC(rc); rc = RTPollSetDestroy(pSockInt->hPollSet); AssertRC(rc); rc = RTPipeClose(pSockInt->hPipeR); AssertRC(rc); rc = RTPipeClose(pSockInt->hPipeW); AssertRC(rc); } if (pSockInt->hSocket != NIL_RTSOCKET) rc = RTTcpClientCloseEx(pSockInt->hSocket, false /*fGracefulShutdown*/); RTMemFree(pSockInt); return rc; } /** @interface_method_impl{VDINTERFACETCPNET,pfnClientConnect} */ static DECLCALLBACK(int) vdIfTcpNetClientConnect(VDSOCKET hVdSock, const char *pszAddress, uint32_t uPort, RTMSINTERVAL cMillies) { int rc = VINF_SUCCESS; PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; rc = RTTcpClientConnectEx(pszAddress, uPort, &pSockInt->hSocket, cMillies, NULL); if (RT_SUCCESS(rc)) { /* Add to the pollset if required. */ if (pSockInt->hPollSet != NIL_RTPOLLSET) { pSockInt->fEventsOld = RTPOLL_EVT_READ | RTPOLL_EVT_WRITE | RTPOLL_EVT_ERROR; rc = RTPollSetAddSocket(pSockInt->hPollSet, pSockInt->hSocket, pSockInt->fEventsOld, VDSOCKET_POLL_ID_SOCKET); } if (RT_SUCCESS(rc)) return VINF_SUCCESS; rc = RTTcpClientCloseEx(pSockInt->hSocket, false /*fGracefulShutdown*/); } return rc; } /** @interface_method_impl{VDINTERFACETCPNET,pfnClientClose} */ static DECLCALLBACK(int) vdIfTcpNetClientClose(VDSOCKET hVdSock) { int rc = VINF_SUCCESS; PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; if (pSockInt->hPollSet != NIL_RTPOLLSET) { rc = RTPollSetRemove(pSockInt->hPollSet, VDSOCKET_POLL_ID_SOCKET); AssertRC(rc); } rc = RTTcpClientCloseEx(pSockInt->hSocket, false /*fGracefulShutdown*/); pSockInt->hSocket = NIL_RTSOCKET; return rc; } /** @interface_method_impl{VDINTERFACETCPNET,pfnIsClientConnected} */ static DECLCALLBACK(bool) vdIfTcpNetIsClientConnected(VDSOCKET hVdSock) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return pSockInt->hSocket != NIL_RTSOCKET; } /** @interface_method_impl{VDINTERFACETCPNET,pfnSelectOne} */ static DECLCALLBACK(int) vdIfTcpNetSelectOne(VDSOCKET hVdSock, RTMSINTERVAL cMillies) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return RTTcpSelectOne(pSockInt->hSocket, cMillies); } /** @interface_method_impl{VDINTERFACETCPNET,pfnRead} */ static DECLCALLBACK(int) vdIfTcpNetRead(VDSOCKET hVdSock, void *pvBuffer, size_t cbBuffer, size_t *pcbRead) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return RTTcpRead(pSockInt->hSocket, pvBuffer, cbBuffer, pcbRead); } /** @interface_method_impl{VDINTERFACETCPNET,pfnWrite} */ static DECLCALLBACK(int) vdIfTcpNetWrite(VDSOCKET hVdSock, const void *pvBuffer, size_t cbBuffer) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return RTTcpWrite(pSockInt->hSocket, pvBuffer, cbBuffer); } /** @interface_method_impl{VDINTERFACETCPNET,pfnSgWrite} */ static DECLCALLBACK(int) vdIfTcpNetSgWrite(VDSOCKET hVdSock, PCRTSGBUF pSgBuf) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return RTTcpSgWrite(pSockInt->hSocket, pSgBuf); } /** @interface_method_impl{VDINTERFACETCPNET,pfnReadNB} */ static DECLCALLBACK(int) vdIfTcpNetReadNB(VDSOCKET hVdSock, void *pvBuffer, size_t cbBuffer, size_t *pcbRead) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return RTTcpReadNB(pSockInt->hSocket, pvBuffer, cbBuffer, pcbRead); } /** @interface_method_impl{VDINTERFACETCPNET,pfnWriteNB} */ static DECLCALLBACK(int) vdIfTcpNetWriteNB(VDSOCKET hVdSock, const void *pvBuffer, size_t cbBuffer, size_t *pcbWritten) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return RTTcpWriteNB(pSockInt->hSocket, pvBuffer, cbBuffer, pcbWritten); } /** @interface_method_impl{VDINTERFACETCPNET,pfnSgWriteNB} */ static DECLCALLBACK(int) vdIfTcpNetSgWriteNB(VDSOCKET hVdSock, PRTSGBUF pSgBuf, size_t *pcbWritten) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return RTTcpSgWriteNB(pSockInt->hSocket, pSgBuf, pcbWritten); } /** @interface_method_impl{VDINTERFACETCPNET,pfnFlush} */ static DECLCALLBACK(int) vdIfTcpNetFlush(VDSOCKET hVdSock) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return RTTcpFlush(pSockInt->hSocket); } /** @interface_method_impl{VDINTERFACETCPNET,pfnSetSendCoalescing} */ static DECLCALLBACK(int) vdIfTcpNetSetSendCoalescing(VDSOCKET hVdSock, bool fEnable) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return RTTcpSetSendCoalescing(pSockInt->hSocket, fEnable); } /** @interface_method_impl{VDINTERFACETCPNET,pfnGetLocalAddress} */ static DECLCALLBACK(int) vdIfTcpNetGetLocalAddress(VDSOCKET hVdSock, PRTNETADDR pAddr) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return RTTcpGetLocalAddress(pSockInt->hSocket, pAddr); } /** @interface_method_impl{VDINTERFACETCPNET,pfnGetPeerAddress} */ static DECLCALLBACK(int) vdIfTcpNetGetPeerAddress(VDSOCKET hVdSock, PRTNETADDR pAddr) { PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; return RTTcpGetPeerAddress(pSockInt->hSocket, pAddr); } static DECLCALLBACK(int) vdIfTcpNetSelectOneExPoll(VDSOCKET hVdSock, uint32_t fEvents, uint32_t *pfEvents, RTMSINTERVAL cMillies) { int rc = VINF_SUCCESS; uint32_t id = 0; uint32_t fEventsRecv = 0; PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; *pfEvents = 0; if ( pSockInt->fEventsOld != fEvents && pSockInt->hSocket != NIL_RTSOCKET) { uint32_t fPollEvents = 0; if (fEvents & VD_INTERFACETCPNET_EVT_READ) fPollEvents |= RTPOLL_EVT_READ; if (fEvents & VD_INTERFACETCPNET_EVT_WRITE) fPollEvents |= RTPOLL_EVT_WRITE; if (fEvents & VD_INTERFACETCPNET_EVT_ERROR) fPollEvents |= RTPOLL_EVT_ERROR; rc = RTPollSetEventsChange(pSockInt->hPollSet, VDSOCKET_POLL_ID_SOCKET, fPollEvents); if (RT_FAILURE(rc)) return rc; pSockInt->fEventsOld = fEvents; } ASMAtomicXchgBool(&pSockInt->fWaiting, true); if (ASMAtomicXchgBool(&pSockInt->fWokenUp, false)) { ASMAtomicXchgBool(&pSockInt->fWaiting, false); return VERR_INTERRUPTED; } rc = RTPoll(pSockInt->hPollSet, cMillies, &fEventsRecv, &id); Assert(RT_SUCCESS(rc) || rc == VERR_TIMEOUT); ASMAtomicXchgBool(&pSockInt->fWaiting, false); if (RT_SUCCESS(rc)) { if (id == VDSOCKET_POLL_ID_SOCKET) { fEventsRecv &= RTPOLL_EVT_VALID_MASK; if (fEventsRecv & RTPOLL_EVT_READ) *pfEvents |= VD_INTERFACETCPNET_EVT_READ; if (fEventsRecv & RTPOLL_EVT_WRITE) *pfEvents |= VD_INTERFACETCPNET_EVT_WRITE; if (fEventsRecv & RTPOLL_EVT_ERROR) *pfEvents |= VD_INTERFACETCPNET_EVT_ERROR; } else { size_t cbRead = 0; uint8_t abBuf[10]; Assert(id == VDSOCKET_POLL_ID_PIPE); Assert((fEventsRecv & RTPOLL_EVT_VALID_MASK) == RTPOLL_EVT_READ); /* We got interrupted, drain the pipe. */ rc = RTPipeRead(pSockInt->hPipeR, abBuf, sizeof(abBuf), &cbRead); AssertRC(rc); ASMAtomicXchgBool(&pSockInt->fWokenUp, false); rc = VERR_INTERRUPTED; } } return rc; } /** @interface_method_impl{VDINTERFACETCPNET,pfnSelectOneEx} */ static DECLCALLBACK(int) vdIfTcpNetSelectOneExNoPoll(VDSOCKET hVdSock, uint32_t fEvents, uint32_t *pfEvents, RTMSINTERVAL cMillies) { RT_NOREF(cMillies); /** @todo timeouts */ int rc = VINF_SUCCESS; PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; *pfEvents = 0; ASMAtomicXchgBool(&pSockInt->fWaiting, true); if (ASMAtomicXchgBool(&pSockInt->fWokenUp, false)) { ASMAtomicXchgBool(&pSockInt->fWaiting, false); return VERR_INTERRUPTED; } if ( pSockInt->hSocket == NIL_RTSOCKET || !fEvents) { /* * Only the pipe is configured or the caller doesn't wait for a socket event, * wait until there is something to read from the pipe. */ size_t cbRead = 0; char ch = 0; rc = RTPipeReadBlocking(pSockInt->hPipeR, &ch, 1, &cbRead); if (RT_SUCCESS(rc)) { Assert(cbRead == 1); rc = VERR_INTERRUPTED; ASMAtomicXchgBool(&pSockInt->fWokenUp, false); } } else { uint32_t fSelectEvents = 0; if (fEvents & VD_INTERFACETCPNET_EVT_READ) fSelectEvents |= RTSOCKET_EVT_READ; if (fEvents & VD_INTERFACETCPNET_EVT_WRITE) fSelectEvents |= RTSOCKET_EVT_WRITE; if (fEvents & VD_INTERFACETCPNET_EVT_ERROR) fSelectEvents |= RTSOCKET_EVT_ERROR; if (fEvents & VD_INTERFACETCPNET_HINT_INTERRUPT) { uint32_t fEventsRecv = 0; /* Make sure the socket is not in the pollset. */ rc = RTPollSetRemove(pSockInt->hPollSet, VDSOCKET_POLL_ID_SOCKET); Assert(RT_SUCCESS(rc) || rc == VERR_POLL_HANDLE_ID_NOT_FOUND); for (;;) { uint32_t id = 0; rc = RTPoll(pSockInt->hPollSet, 5, &fEvents, &id); if (rc == VERR_TIMEOUT) { /* Check the socket. */ rc = RTTcpSelectOneEx(pSockInt->hSocket, fSelectEvents, &fEventsRecv, 0); if (RT_SUCCESS(rc)) { if (fEventsRecv & RTSOCKET_EVT_READ) *pfEvents |= VD_INTERFACETCPNET_EVT_READ; if (fEventsRecv & RTSOCKET_EVT_WRITE) *pfEvents |= VD_INTERFACETCPNET_EVT_WRITE; if (fEventsRecv & RTSOCKET_EVT_ERROR) *pfEvents |= VD_INTERFACETCPNET_EVT_ERROR; break; /* Quit */ } else if (rc != VERR_TIMEOUT) break; } else if (RT_SUCCESS(rc)) { size_t cbRead = 0; uint8_t abBuf[10]; Assert(id == VDSOCKET_POLL_ID_PIPE); Assert((fEventsRecv & RTPOLL_EVT_VALID_MASK) == RTPOLL_EVT_READ); /* We got interrupted, drain the pipe. */ rc = RTPipeRead(pSockInt->hPipeR, abBuf, sizeof(abBuf), &cbRead); AssertRC(rc); ASMAtomicXchgBool(&pSockInt->fWokenUp, false); rc = VERR_INTERRUPTED; break; } else break; } } else /* The caller waits for a socket event. */ { uint32_t fEventsRecv = 0; /* Loop until we got woken up or a socket event occurred. */ for (;;) { /** @todo find an adaptive wait algorithm based on the * number of wakeups in the past. */ rc = RTTcpSelectOneEx(pSockInt->hSocket, fSelectEvents, &fEventsRecv, 5); if (rc == VERR_TIMEOUT) { /* Check if there is an event pending. */ size_t cbRead = 0; char ch = 0; rc = RTPipeRead(pSockInt->hPipeR, &ch, 1, &cbRead); if (RT_SUCCESS(rc) && rc != VINF_TRY_AGAIN) { Assert(cbRead == 1); rc = VERR_INTERRUPTED; ASMAtomicXchgBool(&pSockInt->fWokenUp, false); break; /* Quit */ } else Assert(rc == VINF_TRY_AGAIN); } else if (RT_SUCCESS(rc)) { if (fEventsRecv & RTSOCKET_EVT_READ) *pfEvents |= VD_INTERFACETCPNET_EVT_READ; if (fEventsRecv & RTSOCKET_EVT_WRITE) *pfEvents |= VD_INTERFACETCPNET_EVT_WRITE; if (fEventsRecv & RTSOCKET_EVT_ERROR) *pfEvents |= VD_INTERFACETCPNET_EVT_ERROR; break; /* Quit */ } else break; } } } ASMAtomicXchgBool(&pSockInt->fWaiting, false); return rc; } /** @interface_method_impl{VDINTERFACETCPNET,pfnPoke} */ static DECLCALLBACK(int) vdIfTcpNetPoke(VDSOCKET hVdSock) { int rc = VINF_SUCCESS; size_t cbWritten = 0; PVDSOCKETINT pSockInt = (PVDSOCKETINT)hVdSock; ASMAtomicXchgBool(&pSockInt->fWokenUp, true); if (ASMAtomicReadBool(&pSockInt->fWaiting)) { rc = RTPipeWrite(pSockInt->hPipeW, "", 1, &cbWritten); Assert(RT_SUCCESS(rc) || cbWritten == 0); } return VINF_SUCCESS; } VBOXDDU_DECL(int) VDIfTcpNetInstDefaultCreate(PVDIFINST phTcpNetInst, PVDINTERFACE *ppVdIfs) { AssertPtrReturn(phTcpNetInst, VERR_INVALID_POINTER); AssertPtrReturn(ppVdIfs, VERR_INVALID_POINTER); int rc = VINF_SUCCESS; PVDIFINSTINT pThis = (PVDIFINSTINT)RTMemAllocZ(sizeof(*pThis)); if (RT_LIKELY(pThis)) { pThis->VdIfTcpNet.pfnSocketCreate = vdIfTcpNetSocketCreate; pThis->VdIfTcpNet.pfnSocketDestroy = vdIfTcpNetSocketDestroy; pThis->VdIfTcpNet.pfnClientConnect = vdIfTcpNetClientConnect; pThis->VdIfTcpNet.pfnIsClientConnected = vdIfTcpNetIsClientConnected; pThis->VdIfTcpNet.pfnClientClose = vdIfTcpNetClientClose; pThis->VdIfTcpNet.pfnSelectOne = vdIfTcpNetSelectOne; pThis->VdIfTcpNet.pfnRead = vdIfTcpNetRead; pThis->VdIfTcpNet.pfnWrite = vdIfTcpNetWrite; pThis->VdIfTcpNet.pfnSgWrite = vdIfTcpNetSgWrite; pThis->VdIfTcpNet.pfnReadNB = vdIfTcpNetReadNB; pThis->VdIfTcpNet.pfnWriteNB = vdIfTcpNetWriteNB; pThis->VdIfTcpNet.pfnSgWriteNB = vdIfTcpNetSgWriteNB; pThis->VdIfTcpNet.pfnFlush = vdIfTcpNetFlush; pThis->VdIfTcpNet.pfnSetSendCoalescing = vdIfTcpNetSetSendCoalescing; pThis->VdIfTcpNet.pfnGetLocalAddress = vdIfTcpNetGetLocalAddress; pThis->VdIfTcpNet.pfnGetPeerAddress = vdIfTcpNetGetPeerAddress; pThis->VdIfTcpNet.pfnPoke = vdIfTcpNetPoke; /* * There is a 15ms delay between receiving the data and marking the socket * as readable on Windows XP which hurts async I/O performance of * TCP backends badly. Provide a different select method without * using poll on XP. * This is only used on XP because it is not as efficient as the one using poll * and all other Windows versions are working fine. */ char szOS[64]; memset(szOS, 0, sizeof(szOS)); rc = RTSystemQueryOSInfo(RTSYSOSINFO_PRODUCT, &szOS[0], sizeof(szOS)); if (RT_SUCCESS(rc) && !strncmp(szOS, "Windows XP", 10)) { LogRel(("VD: Detected Windows XP, disabled poll based waiting for TCP\n")); pThis->VdIfTcpNet.pfnSelectOneEx = vdIfTcpNetSelectOneExNoPoll; } else pThis->VdIfTcpNet.pfnSelectOneEx = vdIfTcpNetSelectOneExPoll; rc = VDInterfaceAdd(&pThis->VdIfTcpNet.Core, "VD_IfTcpNet", VDINTERFACETYPE_TCPNET, NULL, sizeof(VDINTERFACETCPNET), ppVdIfs); AssertRC(rc); if (RT_SUCCESS(rc)) *phTcpNetInst = pThis; else RTMemFree(pThis); } else rc = VERR_NO_MEMORY; return rc; } VBOXDDU_DECL(void) VDIfTcpNetInstDefaultDestroy(VDIFINST hTcpNetInst) { PVDIFINSTINT pThis = hTcpNetInst; AssertPtrReturnVoid(pThis); RTMemFree(pThis); }