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856 lines
21 KiB
856 lines
21 KiB
/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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s_ioctl.c
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Abstract:
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This module implements the s_ioctl() operation used by the
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socket library.
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Author:
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Eric Chin (ericc) July 26, 1991
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Revision History:
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Sam Patton (sampa) August 13, 1991
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changed errno to {get|set}lasterror
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--*/
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#include "common.h"
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//
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// BUGBUG: Remove this structure when eric implements
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// neither I/O. Right now, it is needed because sockets allocates
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// the space for this structure in an ioctl call.
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//
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/*
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* IOCTL structure - this structure is the format of the M_IOCTL message type.
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*/
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struct iocblk {
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int ioc_cmd; /* ioctl command type */
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unsigned short ioc_uid; /* effective uid of user */
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unsigned short ioc_gid; /* effective gid of user */
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unsigned int ioc_id; /* ioctl id */
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unsigned int ioc_count; /* count of bytes in data field */
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int ioc_error; /* error code */
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int ioc_rval; /* return value */
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};
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//
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// BUGBUG:
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// The max amount of data that any module in the stream can return in an
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// M_IOCACK message should probably be queried from the Stream Head driver.
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//
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#define MAX_DATA_AMOUNT 0x1000
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//
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// Declaration of Local Functions
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//
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static int
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s_debug(
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IN HANDLE fd,
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IN OUT struct strdebug *dbgbufp
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);
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static int
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s_fdinsert(
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IN HANDLE fd,
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IN struct strfdinsert *iblk
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);
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static int
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s_link(
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IN HANDLE fd,
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IN HANDLE fd2
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);
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static int
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s_push(
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IN HANDLE fd,
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IN char *name
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);
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static int
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s_sioctl(
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IN HANDLE fd,
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IN OUT struct strioctl *iocp
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);
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static int
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s_unlink(
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IN HANDLE fd,
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IN int muxid
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);
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int
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s_ioctl(
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IN HANDLE fd,
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IN int cmd,
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IN OUT void *arg OPTIONAL
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)
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/*++
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Routine Description:
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This procedure is called to perform a STREAMS ioctl() on a stream
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as defined in streamio(7) of the Unix Programmer's Guide: STREAMS.
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Arguments:
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fd - NT file handle
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command - ioctl command code
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arg - command-dependent arg, usually a pointer to some structure
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Return Value:
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0 if successful, -1 otherwise.
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--*/
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{
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switch (cmd) {
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case I_STR:
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return(s_sioctl(fd, (struct strioctl *) arg));
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case I_DEBUG:
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return(s_debug(fd, (struct strdebug *) arg));
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case I_FDINSERT:
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return(s_fdinsert(fd, (struct strfdinsert *) arg));
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case I_PUSH:
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return(s_push(fd, (char *) arg));
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case I_LINK:
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return(s_link(fd, (HANDLE) arg));
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case I_UNLINK:
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return(s_unlink(fd, (int) ((ULONG_PTR)arg)));
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default:
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SetLastError(EINVAL);
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return(-1);
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}
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}
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static int
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s_debug(
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IN HANDLE fd,
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IN OUT struct strdebug *dbgbufp
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)
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/*++
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Routine Description:
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This procedure performs an I_DEBUG ioctl command on a stream.
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Arguments:
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fd - NT file handle
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dbgbufp - pointer to a strdebug structure
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Return Value:
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0 if successful, -1 otherwise.
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--*/
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{
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char *tmp;
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char *chunk;
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NTSTATUS status;
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int chunksz, retval;
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IO_STATUS_BLOCK iosb;
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if (dbgbufp == NULL) {
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SetLastError(EINVAL);
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return(-1);
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}
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chunksz = sizeof(int) + sizeof(struct strdebug);
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if (!(chunk = (char *) LocalAlloc(LMEM_FIXED, chunksz))) {
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SetLastError(ENOSPC);
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return(-1);
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}
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//
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// marshall the arguments into one contiguous chunk, laid out as:
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//
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// union {
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// struct {
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// int s_code; // I_DEBUG
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// struct strdebug dbgbuf;
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// } in;
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//
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// struct {
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// int s_retval;
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// int s_errno;
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// } out;
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// };
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//
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* ((int *) chunk) = I_DEBUG;
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tmp = chunk + sizeof(int);
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memcpy(tmp, dbgbufp, sizeof(struct strdebug));
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status = NtDeviceIoControlFile(
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fd,
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NULL, // Event
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NULL, // ApcRoutine
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NULL, // ApcContext
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&iosb, // IoStatusBlock
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IOCTL_STREAMS_IOCTL, // IoControlCode
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(PVOID) chunk, // InputBuffer
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chunksz, // InputBufferSize
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(PVOID) chunk, // OutputBuffer
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chunksz); // OutputBufferSize
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if (status == STATUS_PENDING) {
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status =
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NtWaitForSingleObject(
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fd,
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TRUE,
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NULL);
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}
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if (!NT_SUCCESS(status)) {
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LocalFree((HANDLE) chunk);
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SetLastError(MapNtToPosixStatus(status));
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return(-1);
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}
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//
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// the Stream Head driver returned values in one chunk, laid out as:
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//
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// int return value (required)
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// int errno; (required)
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//
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retval = * (int *) chunk;
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if (retval == -1) {
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SetLastError(* (int *) (chunk + sizeof(int)));
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}
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LocalFree((HANDLE) chunk);
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return(retval);
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}
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int
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s_fdinsert(
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IN HANDLE fd,
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IN struct strfdinsert *iblk
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)
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/*++
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Routine Description:
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This function performs an ioctl(I_FDINSERT) on a stream, which is a
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special form of putmsg().
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This function is synchronous, in the NT sense: it blocks until the API
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completes.
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Arguments:
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fd - NT file handle
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iblk - pointer to a strfdinsert structure
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Return Value:
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0 if successful, -1 otherwise.
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--*/
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{
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char *tmp;
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NTSTATUS status;
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int chunksz, retval;
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IO_STATUS_BLOCK iosb;
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PSTRM_ARGS_OUT oparm;
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PPUTMSG_ARGS_IN chunk;
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if (!iblk) {
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SetLastError(EINVAL);
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return(-1);
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}
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if (iblk->ctlbuf.len <= 0) {
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SetLastError(ERANGE);
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return(-1);
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}
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//
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// iblk->databuf.len may be -1, to indicate no data buffer.
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//
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chunksz = sizeof(PUTMSG_ARGS_IN) - 1 +
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iblk->ctlbuf.len + max(iblk->databuf.len, 0);
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if (!(chunk = (PPUTMSG_ARGS_IN) LocalAlloc(LMEM_FIXED, chunksz))) {
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SetLastError(ENOSPC);
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return(-1);
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}
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//
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// marshall the arguments into one contiguous chunk. However, for
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// commonality with putmsg(), we rearrange the strfdinsert structure
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// as below:
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//
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// typedef struct _PUTMSG_ARGS_IN_ {
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// int a_iocode; // I_FDINSERT
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// long a_flags; // 0 | RS_HIPRI
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// struct strbuf a_ctlbuf; // (required)
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// struct strbuf a_databuf; // (required)
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// HANDLE a_insert.i_fildes; // (required)
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// int a_offset; // (optional)
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// char a_stuff[1]; // s_ctlbuf.buf (required)
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// // s_databuf.buf (optional)
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// } PUTMSG_ARGS_IN, *PPUTMSG_ARGS_IN;
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//
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//
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chunk->a_iocode = I_FDINSERT;
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chunk->a_flags = iblk->flags;
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chunk->a_ctlbuf = iblk->ctlbuf; // structure copy
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chunk->a_databuf = iblk->databuf; // structure copy
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chunk->a_insert.i_fildes = iblk->fildes;
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chunk->a_offset = iblk->offset;
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tmp = (char *) chunk->a_stuff;
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assert(iblk->ctlbuf.len > 0);
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memcpy(tmp, iblk->ctlbuf.buf, iblk->ctlbuf.len);
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tmp += iblk->ctlbuf.len;
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if (iblk->databuf.len > 0) {
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memcpy(tmp, iblk->databuf.buf, iblk->databuf.len);
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}
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ASSERT(chunksz >= sizeof(STRM_ARGS_OUT));
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status = NtDeviceIoControlFile(
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fd, // Handle
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NULL, // Event
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NULL, // ApcRoutine
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NULL, // ApcContext
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&iosb, // IoStatusBlock
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IOCTL_STREAMS_IOCTL, // IoControlCode
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(PVOID) chunk, // InputBuffer
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chunksz, // InputBufferSize
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(PVOID) chunk, // OutputBuffer
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chunksz); // OutputBufferSize
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if (status == STATUS_PENDING) {
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status = NtWaitForSingleObject(
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fd, // Handle
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TRUE, // Alertable
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NULL); // Timeout
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}
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if (!NT_SUCCESS(status)) {
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LocalFree(chunk);
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SetLastError(MapNtToPosixStatus(status));
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return(-1);
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}
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//
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// the return parameters from the Stream Head Driver are laid out as:
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//
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// typedef struct _STRM_ARGS_OUT_ { // generic return parameters
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// int a_retval; // return value
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// int a_errno; // errno if retval == -1
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//
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// } STRM_ARGS_OUT, *PSTRM_ARGS_OUT;
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//
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//
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oparm = (PSTRM_ARGS_OUT) chunk;
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retval = oparm->a_retval;
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if (retval == -1) {
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SetLastError(oparm->a_errno);
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}
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LocalFree(chunk);
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return(retval);
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} // s_fdinsert
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static int
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s_link(
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IN HANDLE fd,
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IN HANDLE fd2
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)
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/*++
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Routine Description:
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This procedure performs an I_LINK ioctl command on a stream.
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Arguments:
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fd - NT file handle to upstream driver
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fd2 - NT file handle to downstream driver
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Return Value:
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multiplexor id number, or -1 if unsuccessful
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--*/
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{
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char *chunk;
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NTSTATUS status;
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int chunksz, retval;
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IO_STATUS_BLOCK iosb;
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chunksz = sizeof(int) + sizeof(HANDLE);
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if (!(chunk = (char *) LocalAlloc(LMEM_FIXED, chunksz))) {
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SetLastError(ENOSPC);
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return(-1);
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}
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//
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// marshall the arguments into one contiguous chunk, laid out as:
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//
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// union {
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// struct {
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// int s_code; // I_LINK
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//
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// union {
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// HANDLE l_fd2;
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// } s_link;
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// } in;
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//
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// struct {
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// int s_retval;
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// int s_errno;
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// } out;
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// };
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//
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* ((int *) chunk) = I_LINK;
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* (PHANDLE) ((int *) chunk + 1) = fd2;
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status = NtDeviceIoControlFile(
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fd,
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NULL, // Event
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NULL, // ApcRoutine
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NULL, // ApcContext
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&iosb, // IoStatusBlock
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IOCTL_STREAMS_IOCTL, // IoControlCode
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(PVOID) chunk, // InputBuffer
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chunksz, // InputBufferSize
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(PVOID) chunk, // OutputBuffer
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chunksz); // OutputBufferSize
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if (status == STATUS_PENDING) {
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status =
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NtWaitForSingleObject(
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fd,
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TRUE,
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NULL);
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}
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if (!NT_SUCCESS(status)) {
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LocalFree((HANDLE) chunk);
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SetLastError(MapNtToPosixStatus(status));
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return(-1);
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}
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//
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// the Stream Head driver returned values in one chunk, laid out as:
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//
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// union {
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// struct {
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// int s_code; // I_LINK
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//
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// union {
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// HANDLE l_fd2;
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// } s_link;
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// } in;
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//
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// struct {
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// int s_retval;
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// int s_errno;
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// } out;
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// };
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//
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if ((retval = * (int *) chunk) == -1) {
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SetLastError(* (int *) (chunk + sizeof(int)));
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}
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LocalFree((HANDLE) chunk);
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return(retval);
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}
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static int
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s_push(
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IN HANDLE fd,
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IN char *name
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)
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/*++
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Routine Description:
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This procedure performs an I_LINK ioctl command on a stream.
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Arguments:
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fd - NT file handle to stream
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name - name of STREAMS module to be pushed
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Return Value:
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0 if successful, -1 otherwise
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--*/
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{
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char *chunk;
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NTSTATUS status;
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int chunksz, retval;
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IO_STATUS_BLOCK iosb;
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chunksz = (int)(max(2 * sizeof(int), sizeof(int) + strlen(name) + 1));
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if (!(chunk = (char *) LocalAlloc(LMEM_FIXED, chunksz))) {
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SetLastError(ENOSPC);
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return(-1);
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}
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//
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// marshall the arguments into one contiguous chunk, laid out as:
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//
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// union {
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// struct {
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// int s_code; // I_PUSH
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//
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// union {
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// char p_name[1];
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// } s_push;
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// } in;
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//
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// struct {
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// int s_retval;
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// int s_errno;
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// } out;
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// };
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//
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* ((int *) chunk) = I_PUSH;
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strcpy(chunk + sizeof(int), name);
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status = NtDeviceIoControlFile(
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fd,
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NULL, // Event
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NULL, // ApcRoutine
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NULL, // ApcContext
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&iosb, // IoStatusBlock
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IOCTL_STREAMS_IOCTL, // IoControlCode
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(PVOID) chunk, // InputBuffer
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chunksz, // InputBufferSize
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(PVOID) chunk, // OutputBuffer
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chunksz); // OutputBufferSize
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if (status == STATUS_PENDING) {
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status =
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NtWaitForSingleObject(
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fd,
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TRUE,
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NULL);
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}
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|
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if (!NT_SUCCESS(status)) {
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LocalFree((HANDLE) chunk);
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SetLastError(MapNtToPosixStatus(status));
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return(-1);
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}
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|
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//
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// the Stream Head driver returned values in one chunk, laid out as:
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//
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// union {
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// struct {
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// int s_code; // I_LINK
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// } in;
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//
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// struct {
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// int s_retval;
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// int s_errno;
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// } out;
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// };
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//
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if ((retval = * (int *) chunk) == -1) {
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SetLastError(* (int *) (chunk + sizeof(int)));
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}
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LocalFree((HANDLE) chunk);
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return(retval);
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}
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|
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static int
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s_sioctl(
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IN HANDLE fd,
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IN OUT struct strioctl *iocp
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)
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|
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/*++
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|
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Routine Description:
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|
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This procedure performs an ioctl(I_STR) on a stream.
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Arguments:
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fd - NT file handle
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iocp - pointer to a strioctl structure
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Return Value:
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0 if successful, -1 otherwise.
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|
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--*/
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|
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{
|
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NTSTATUS status;
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int chunksz, retval;
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IO_STATUS_BLOCK iosb;
|
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PISTR_ARGS_INOUT chunk;
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|
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union outparms {
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ISTR_ARGS_INOUT o_ok;
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STRM_ARGS_OUT o_bad;
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} *oparm;
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|
|
|
if (!iocp || (iocp->ic_len < 0)) {
|
|
SetLastError(EINVAL);
|
|
return(-1);
|
|
}
|
|
chunksz = sizeof(ISTR_ARGS_INOUT) + max(iocp->ic_len, MAX_DATA_AMOUNT);
|
|
chunk = (PISTR_ARGS_INOUT) LocalAlloc(LMEM_FIXED, chunksz);
|
|
|
|
if (!chunk) {
|
|
SetLastError(ENOSPC);
|
|
return(-1);
|
|
}
|
|
|
|
//
|
|
// marshall the arguments into one contiguous chunk, laid out as:
|
|
//
|
|
// typedef struct _ISTR_ARGS_INOUT { // ioctl(I_STR)
|
|
// int a_iocode; // I_STR
|
|
// struct strioctl a_strio; // (required)
|
|
// int a_unused[2]; // (required) BUGBUG
|
|
// char a_stuff[1]; // (optional)
|
|
//
|
|
// } ISTR_ARGS_INOUT, *PISTR_ARGS_INOUT;
|
|
//
|
|
//
|
|
// An optimizing compiler will warn that the assertion below contains
|
|
// unreachable code. Ignore the warning.
|
|
//
|
|
assert((char *) chunk->a_stuff - (char *) &(chunk->a_strio) >=
|
|
sizeof(struct iocblk));
|
|
|
|
chunk->a_iocode = I_STR;
|
|
memcpy(&(chunk->a_strio), iocp, sizeof(struct strioctl));
|
|
|
|
if (iocp->ic_len >= 0) {
|
|
memcpy(&(chunk->a_stuff), iocp->ic_dp, iocp->ic_len);
|
|
}
|
|
|
|
status = NtDeviceIoControlFile(
|
|
fd, // Handle
|
|
NULL, // Event
|
|
NULL, // ApcRoutine
|
|
NULL, // ApcContext
|
|
&iosb, // IoStatusBlock
|
|
IOCTL_STREAMS_IOCTL, // IoControlCode
|
|
(PVOID) chunk, // InputBuffer
|
|
chunksz, // InputBufferSize
|
|
(PVOID) chunk, // OutputBuffer
|
|
chunksz); // OutputBufferSize
|
|
|
|
|
|
if (status == STATUS_PENDING) {
|
|
status = NtWaitForSingleObject(
|
|
fd, // Handle
|
|
TRUE, // Alertable
|
|
NULL); // Timeout
|
|
}
|
|
|
|
if (!NT_SUCCESS(status)) {
|
|
LocalFree(chunk);
|
|
SetLastError(MapNtToPosixStatus(status));
|
|
return(-1);
|
|
}
|
|
|
|
//
|
|
// if there was an error, the return parameters from the Stream Head
|
|
// Driver are laid out as:
|
|
//
|
|
// typedef struct _STRM_ARGS_OUT_ { // generic return parameters
|
|
// int a_retval; // return value
|
|
// int a_errno; // errno if retval == -1
|
|
//
|
|
// } STRM_ARGS_OUT, *PSTRM_ARGS_OUT;
|
|
//
|
|
//
|
|
oparm = (union outparms *) chunk;
|
|
retval = oparm->o_bad.a_retval;
|
|
|
|
if (retval == -1) {
|
|
SetLastError(oparm->o_bad.a_errno);
|
|
LocalFree(chunk);
|
|
return(retval);
|
|
}
|
|
|
|
//
|
|
// if there wasn't an error, the return parameters from the Stream Head
|
|
// Driver are laid out as:
|
|
//
|
|
// typedef struct _ISTR_ARGS_INOUT { // ioctl(I_STR)
|
|
// int a_iocode; // return value
|
|
// struct strioctl a_strio; // (required)
|
|
// int a_unused[2];
|
|
// char a_stuff[1]; // (optional)
|
|
//
|
|
// } ISTR_ARGS_INOUT, *PISTR_ARGS_INOUT;
|
|
//
|
|
// However, a_iocode now holds the return value.
|
|
//
|
|
//
|
|
if (iocp && iocp->ic_dp) {
|
|
iocp->ic_len = oparm->o_ok.a_strio.ic_len;
|
|
|
|
if (iocp->ic_len >= 0) {
|
|
memcpy(iocp->ic_dp, oparm->o_ok.a_stuff, iocp->ic_len);
|
|
}
|
|
}
|
|
LocalFree(chunk);
|
|
return(retval);
|
|
|
|
} // s_sioctl
|
|
|
|
|
|
|
|
|
|
static int
|
|
s_unlink(
|
|
IN HANDLE fd,
|
|
IN int muxid
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This procedure performs an I_UNLINK ioctl command on a stream.
|
|
|
|
Arguments:
|
|
|
|
fd - NT file handle to upstream driver
|
|
muxid - STREAMS multiplexor id of the lower stream
|
|
|
|
Return Value:
|
|
|
|
0 on success, or -1 on failure
|
|
|
|
--*/
|
|
{
|
|
int chunk[2];
|
|
NTSTATUS status;
|
|
int chunksz, retval;
|
|
IO_STATUS_BLOCK iosb;
|
|
|
|
//
|
|
// marshall the arguments into one contiguous chunk, laid out as:
|
|
//
|
|
// union {
|
|
// struct {
|
|
// int s_code; // I_UNLINK
|
|
//
|
|
// union {
|
|
// int l_muxid;
|
|
// } s_unlink;
|
|
// } in;
|
|
//
|
|
// struct {
|
|
// int s_retval;
|
|
// int s_errno;
|
|
// } out;
|
|
// };
|
|
//
|
|
chunk[0] = I_UNLINK;
|
|
chunk[1] = muxid;
|
|
chunksz = sizeof(chunk);
|
|
|
|
status = NtDeviceIoControlFile(
|
|
fd, // Handle
|
|
NULL, // Event
|
|
NULL, // ApcRoutine
|
|
NULL, // ApcContext
|
|
&iosb, // IoStatusBlock
|
|
IOCTL_STREAMS_IOCTL, // IoControlCode
|
|
(PVOID) chunk, // InputBuffer
|
|
chunksz, // InputBufferSize
|
|
(PVOID) chunk, // OutputBuffer
|
|
chunksz); // OutputBufferSize
|
|
|
|
if (status == STATUS_PENDING) {
|
|
status =
|
|
NtWaitForSingleObject(
|
|
fd,
|
|
TRUE,
|
|
NULL);
|
|
}
|
|
|
|
if (!NT_SUCCESS(status)) {
|
|
SetLastError(MapNtToPosixStatus(status));
|
|
return(-1);
|
|
}
|
|
|
|
//
|
|
// the Stream Head driver returned values in one chunk, laid out as:
|
|
//
|
|
// union {
|
|
// struct {
|
|
// int s_code; // I_UNLINK
|
|
//
|
|
// union {
|
|
// HANDLE l_fd2;
|
|
// } s_link;
|
|
// } in;
|
|
//
|
|
// struct {
|
|
// int s_retval;
|
|
// int s_errno;
|
|
// } out;
|
|
// };
|
|
//
|
|
if ((retval = chunk[0]) == -1) {
|
|
SetLastError(chunk[1]);
|
|
}
|
|
return(retval);
|
|
|
|
} // s_unlink
|