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519 lines
10 KiB
519 lines
10 KiB
/*++
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Copyright (c) 1989 Microsoft Corporation
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Module Name:
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apireqst.c
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Abstract:
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This module implements the main loop servicing API RPC's.
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Author:
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Mark Lucovsky (markl) 05-Apr-1989
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Revision History:
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--*/
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#include "psxsrv.h"
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#define NOEXTAPI
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#include "wdbgexts.h"
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#include "ntdbg.h"
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//
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// API Dispatch Table
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//
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PPSX_API_ROUTINE PsxServerApiDispatch[PsxMaxApiNumber] = {
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PsxFork,
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PsxExec,
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PsxWaitPid,
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PsxExit,
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PsxKill,
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PsxSigAction,
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PsxSigProcMask,
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PsxSigPending,
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PsxSigSuspend,
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PsxAlarm,
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PsxGetIds,
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PsxSetUid,
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PsxSetGid,
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PsxGetGroups,
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PsxGetLogin,
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PsxCUserId,
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PsxSetSid,
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PsxSetPGroupId,
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PsxUname,
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PsxTime,
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PsxGetProcessTimes,
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PsxTtyName,
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PsxIsatty,
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PsxSysconf,
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PsxOpen,
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PsxUmask,
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PsxLink,
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PsxMkDir,
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PsxMkFifo,
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PsxRmDir,
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PsxRename,
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PsxStat,
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PsxFStat,
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PsxAccess,
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PsxChmod,
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PsxChown,
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PsxUtime,
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PsxPathConf,
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PsxFPathConf,
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PsxPipe,
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PsxDup,
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PsxDup2,
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PsxClose,
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PsxRead,
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PsxWrite,
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PsxFcntl,
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PsxLseek,
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PsxTcGetAttr,
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PsxTcSetAttr,
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PsxTcSendBreak,
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PsxTcDrain,
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PsxTcFlush,
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PsxTcFlow,
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PsxTcGetPGrp,
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PsxTcSetPGrp,
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PsxGetPwUid,
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PsxGetPwNam,
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PsxGetGrGid,
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PsxGetGrNam,
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PsxUnlink,
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PsxReadDir,
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PsxFtruncate,
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PsxNull
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#ifdef PSX_SOCKET
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,
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PsxSocket,
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PsxAccept,
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PsxBind,
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PsxConnect,
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PsxGetPeerName,
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PsxGetSockName,
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PsxGetSockOpt,
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PsxListen,
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PsxRecv,
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PsxSend,
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PsxSendTo,
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PsxSetSockOpt,
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PsxShutdown
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#endif // PSX_SOCKET
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};
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#if DBG
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PSZ PsxServerApiName[PsxMaxApiNumber] = {
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"PsxFork",
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"PsxExec",
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"PsxWaitPid",
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"PsxExit",
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"PsxKill",
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"PsxSigAction",
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"PsxSigProcMask",
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"PsxSigPending",
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"PsxSigSuspend",
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"PsxAlarm",
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"PsxGetIds",
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"PsxSetUid",
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"PsxSetGid",
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"PsxGetGroups",
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"PsxGetLogin",
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"PsxCUserId",
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"PsxSetSid",
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"PsxSetPGroupId",
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"PsxUname",
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"PsxTime",
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"PsxGetProcessTimes",
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"PsxTtyName",
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"PsxIsatty",
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"PsxSysconf",
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"PsxOpen",
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"PsxUmask",
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"PsxLink",
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"PsxMkDir",
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"PsxMkFifo",
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"PsxRmDir",
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"PsxRename",
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"PsxStat",
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"PsxFStat",
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"PsxAccess",
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"PsxChmod",
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"PsxChown",
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"PsxUtime",
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"PsxPathConf",
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"PsxFPathConf",
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"PsxPipe",
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"PsxDup",
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"PsxDup2",
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"PsxClose",
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"PsxRead",
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"PsxWrite",
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"PsxFcntl",
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"PsxLseek",
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"PsxTcGetAttr",
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"PsxTcSetAttr",
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"PsxTcSendBreak",
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"PsxTcDrain",
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"PsxTcFlush",
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"PsxTcFlow",
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"PsxTcGetPGrp",
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"PsxTcSetPGrp",
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"PsxGetPwUid",
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"PsxGetPwNam",
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"PsxGetGrGid",
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"PsxGetGrNam",
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"PsxUnlink",
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"PsxReadDir",
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"PsxFtruncate",
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"PsxNull"
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#ifdef PSX_SOCKET
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,
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"PsxSocket",
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"PsxAccept",
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"PsxBind",
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"PsxConnect",
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"PsxGetPeerName",
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"PsxGetSockName",
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"PsxGetSockOpt",
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"PsxListen",
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"PsxRecv",
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"PsxRecvFrom",
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"PsxSend",
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"PsxSendTo",
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"PsxSetSockOpt",
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"PsxShutdown"
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#endif // PSX_SOCKET
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};
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VOID dumpmsg( IN PPSX_API_MSG ReplyMsg);
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#endif //DBG
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#if _MSC_FULL_VER >= 13008827
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#pragma warning(push)
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#pragma warning(disable:4715) // Not all control paths return (due to infinite loop)
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#endif
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NTSTATUS
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PsxApiRequestThread(
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IN PVOID Parameter
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)
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{
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NTSTATUS Status;
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PPSX_PROCESS Process;
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PSX_API_MSG ReceiveMsg;
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PPSX_API_MSG ReplyMsg;
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USHORT MessageType;
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PVOID PortContext; // pointer to process structure
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KERNEL_USER_TIMES ThreadTime;
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ULONG PosixUTime1, PosixUTime2, Remainder, LengthNeeded;
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ULONG PosixSTime1, PosixSTime2;
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BOOLEAN Reply;
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UNREFERENCED_PARAMETER(Parameter);
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ReplyMsg = NULL;
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while (TRUE) {
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Status = NtQueryInformationThread(NtCurrentThread(),
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ThreadTimes,
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(PVOID)&ThreadTime, sizeof(ThreadTime), &LengthNeeded);
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ASSERT(NT_SUCCESS(Status));
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PosixUTime1 = RtlExtendedLargeIntegerDivide(
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ThreadTime.UserTime, 10000, &Remainder).LowPart;
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PosixSTime1 = RtlExtendedLargeIntegerDivide(
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ThreadTime.KernelTime, 10000, &Remainder).LowPart;
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Status = NtReplyWaitReceivePort(PsxApiPort,
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&PortContext, (PPORT_MESSAGE)ReplyMsg,
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(PPORT_MESSAGE)&ReceiveMsg);
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if (Status != 0) {
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if (NT_SUCCESS(Status)) {
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continue;
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}
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if (STATUS_INVALID_CID == Status) {
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ReplyMsg = NULL;
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continue;
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}
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KdPrint(("PSXSS: ReceivePort failed: 0x%x\n",
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Status));
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ReplyMsg = NULL;
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continue;
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}
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MessageType = ReceiveMsg.h.u2.s2.Type;
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if (MessageType == LPC_CONNECTION_REQUEST) {
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PsxApiHandleConnectionRequest( &ReceiveMsg );
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ReplyMsg = NULL;
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continue;
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}
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Process = PsxLocateProcessByClientId(&ReceiveMsg.h.ClientId);
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if (NULL == Process) {
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if (LPC_CLIENT_DIED == MessageType ||
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LPC_PORT_CLOSED == MessageType ||
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LPC_ERROR_EVENT == MessageType
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) {
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ReplyMsg = NULL;
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continue;
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}
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if (LPC_EXCEPTION == MessageType) {
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ReplyMsg = &ReceiveMsg;
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ReplyMsg->ReturnValue = DBG_CONTINUE;
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continue;
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}
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KdPrint(("PSXSS: msg %d from unknown client: %d, %d\n",
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ReceiveMsg.ApiNumber,
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ReceiveMsg.h.ClientId.UniqueProcess,
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ReceiveMsg.h.ClientId.UniqueThread));
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ReceiveMsg.Error = ESRCH;
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ReplyMsg = NULL;
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continue;
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}
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//
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// For each POSIX API message
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// - Validate the API Number
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// - Dispatch the call
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// - Optionally Reply
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//
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if (LPC_CLIENT_DIED == MessageType) {
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// XXX.mjb: do we need to increment InPsx here?
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// XXX.mjb: this exit status should be meaningful.
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Exit(Process, (ULONG)-1);
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ReplyMsg = NULL; // no one to reply to.
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continue;
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}
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if (LPC_EXCEPTION == MessageType) {
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PDBGKM_APIMSG m;
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KdPrint(("PSXSS: Pid 0x%x has taken an exception\n",
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Process->Pid));
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Exit(Process, (ULONG)-1);
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//
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// XXX.mjb: would be nice to print an error
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// message.
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//
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m = (PDBGKM_APIMSG)&ReceiveMsg;
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m->ReturnedStatus = DBG_CONTINUE;
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ReplyMsg = &ReceiveMsg;
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ReplyMsg->ReturnValue = DBG_CONTINUE;
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continue;
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}
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if (LPC_ERROR_EVENT == MessageType) {
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PHARDERROR_MSG m;
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m = (PHARDERROR_MSG)&ReceiveMsg;
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m->Response = (ULONG)ResponseNotHandled;
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Exit(Process, (ULONG)-1);
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ReplyMsg = NULL; // no one to reply to.
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continue;
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}
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if (LPC_REQUEST != MessageType) {
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KdPrint(("PSXSS: Unknown message type 0x%x\n",
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MessageType));
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ReplyMsg = NULL; // no one to reply to.
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continue;
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}
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if (Process != PortContext) {
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//
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// This message was sent by a diffferent process than
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// the one that now has this ClientId. We discard
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// the message.
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//
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ReplyMsg = NULL;
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continue;
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}
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AcquireProcessLock(Process);
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Process->InPsx++;
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Process->IntControlBlock = (PINTCB) NULL;
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ReleaseProcessLock(Process);
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if (ReceiveMsg.ApiNumber >= PsxMaxApiNumber) {
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KdPrint(("PSXSS: %lx is invalid ApiNumber\n",
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ReceiveMsg.ApiNumber));
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ReceiveMsg.Error = ENOSYS;
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ReplyMsg = &ReceiveMsg;
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continue;
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}
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ReplyMsg = &ReceiveMsg;
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ReceiveMsg.Error = 0L;
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ReceiveMsg.ReturnValue = 0L;
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Reply = (*PsxServerApiDispatch[ReceiveMsg.ApiNumber])
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(Process, &ReceiveMsg);
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if (!(Process->Flags & P_FREE)) {
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//
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// the process has exited, don't try to fiddle
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// with times.
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//
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if (!Reply) {
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ReplyMsg = NULL;
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continue;
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}
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}
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//
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// the user and system time for the posix server are added to
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// the process *system* time (the system is executing in user
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// and kernel mode on behalf of the process).
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//
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Status = NtQueryInformationThread(NtCurrentThread(),
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ThreadTimes,
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(PVOID)&ThreadTime, sizeof(ThreadTime), &LengthNeeded);
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ASSERT(NT_SUCCESS(Status));
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PosixUTime2 = RtlExtendedLargeIntegerDivide(
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ThreadTime.UserTime, 10000, &Remainder).LowPart;
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PosixSTime2 = RtlExtendedLargeIntegerDivide(
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ThreadTime.KernelTime, 10000, &Remainder).LowPart;
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Process->ProcessTimes.tms_stime += (PosixUTime2 - PosixUTime1);
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Process->ProcessTimes.tms_stime += (PosixSTime2 - PosixSTime1);
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if (!Reply) {
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ReplyMsg = NULL;
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continue;
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}
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if (PendingSignalHandledInside(Process, &ReceiveMsg, NULL)) {
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ReplyMsg = NULL; // Don't reply
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continue;
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}
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AcquireProcessLock(Process);
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--Process->InPsx;
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ReleaseProcessLock(Process);
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}
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NtTerminateThread(NtCurrentThread(), Status);
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return Status;
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}
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#if _MSC_FULL_VER >= 13008827
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#pragma warning(pop)
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#endif
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VOID
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ApiReply(
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IN PPSX_PROCESS Process,
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IN PPSX_API_MSG ReplyMsg,
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IN sigset_t *RestoreBlockSigset OPTIONAL
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)
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/*++
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Routine Description:
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This routine issues a reply for the specified message on behalf of the
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specified process.
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Arguments:
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Process - Supplies the address of the process on whose behalf the reply
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is being made.
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ReplyMsg - Supplies the value of the reply message.
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RestoreBlockSigset - Supplies an optional blocked signal mask that
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should be restored after the signal completes
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Return Value:
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None.
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--*/
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{
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NTSTATUS Status;
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HANDLE ReplyPort;
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if (!PendingSignalHandledInside(Process, ReplyMsg, RestoreBlockSigset)) {
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#if DBG
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IF_PSX_DEBUG( MSGDUMP ) {
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KdPrint(("--- REPLY TebServicer %lx Message... Pid %lx\n",
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NtCurrentTeb(), Process->Pid));
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dumpmsg(ReplyMsg);
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}
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#endif //DBG
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ReplyPort = Process->ClientPort;
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Status = NtReplyPort(ReplyPort, (PPORT_MESSAGE)ReplyMsg);
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if (!NT_SUCCESS(Status)) {
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//
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// We can get here, if, for instance, somebody shoots a
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// process out from under us.
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//
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KdPrint(("PSXSS: ReplyPort: 0x%x\n", Status));
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}
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--Process->InPsx;
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return;
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}
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}
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#if DBG
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VOID
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dumpmsg(
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IN PPSX_API_MSG Msg
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)
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{
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PULONG l;
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ULONG p1,p2,p3;
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KdPrint(("Length %lx\n",Msg->h.u1.Length));
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KdPrint(("MapInfo and Type %lx\n",Msg->h.u2.ZeroInit));
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KdPrint(("ClientId %lx.%lx\n",
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Msg->h.ClientId.UniqueProcess,
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Msg->h.ClientId.UniqueThread));
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KdPrint(("ApiName %lx %s\n",Msg->ApiNumber,PsxServerApiName[Msg->ApiNumber]));
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KdPrint(("Error %lx\n",Msg->Error));
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KdPrint(("ReturnValue %lx\n",Msg->ReturnValue));
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l = (PULONG) (&Msg->u.Fork);
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p1 = *l++;
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p2 = *l++;
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p3 = *l++;
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KdPrint(("Args[0..2] \t%lx\n\t\t%lx\n\t\t%lx\n",p1,p2,p3));
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}
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#endif //DBG
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