windows-nt/Source/XPSP1/NT/base/cluster/resdll/ndquorum/srvtrans.c

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2020-09-26 03:20:57 -05:00
/*++
Copyright (c) 2000 Microsoft Corporation
Module Name:
srvtrans.c
Abstract:
Implements transaction smb packets
Author:
Ahmed Mohamed (ahmedm) 1-Feb-2000
Revision History:
--*/
#include "srv.h"
typedef struct {
HANDLE handle;
WIN32_FIND_DATA *last;
ULONG cookie;
USHORT Sid;
USHORT info_level;
USHORT base_size;
USHORT add_res_key;
}dm_t;
static CRITICAL_SECTION dLock;
#define DirTableSz 1024
static dm_t *DirTable[DirTableSz];
#define SET_REQ(x, type, p) { \
x = (type) (p)->in.pParameters; \
(p)->in.pParameters += sizeof(*x); \
}
// XXX: need to handle padding
void*
ADD_RESP_PARAMS(
Packet_t * msg,
Trans2_t * trans2,
PVOID resp,
USHORT size
)
{
PUCHAR p;
if (trans2->out.ParameterBytesLeft < size) return 0;
if (trans2->out.pResp->DataCount) {
PUCHAR d = (PUCHAR)msg->out.smb;
d += trans2->out.pResp->DataOffset;
// need to use MoveMemory due to possible overlap
RtlMoveMemory((PVOID)(d + size),
(PVOID)d, trans2->out.pResp->DataCount);
// we up the data offset below
}
p = (PUCHAR)msg->out.smb;
p += trans2->out.pResp->ParameterOffset +
trans2->out.pResp->ParameterCount;
if (resp) RtlCopyMemory((PVOID)p, (PVOID)resp, (ULONG)size);
trans2->out.pResp->ParameterCount += size;
trans2->out.pResp->TotalParameterCount += size;
*(trans2->out.pByteCount) += size;
trans2->out.pResp->DataOffset += size;
msg->out.valid += size;
trans2->out.ParameterBytesLeft -= size;
return p;
}
void*
ADD_RESP_DATA(
Packet_t * msg,
Trans2_t * trans2,
PVOID resp,
USHORT size
)
{
PUCHAR d;
if (trans2->out.DataBytesLeft < size) {
return 0;
}
d = (PUCHAR)msg->out.smb;
d += (trans2->out.pResp->DataOffset +
trans2->out.pResp->DataCount);
if (resp != NULL) {
RtlCopyMemory((PVOID)d, (PVOID)resp, (ULONG)size);
}
trans2->out.pResp->DataCount += size;
trans2->out.pResp->TotalDataCount += size;
*(trans2->out.pByteCount) += size;
msg->out.valid += size;
trans2->out.DataBytesLeft -= size;
return d;
}
////
BOOL
Trans2Unknown(
Packet_t * msg,
Trans2_t * trans2
)
{
SrvLogError(("DOSERROR: (------ CANNOT HANDLE THIS TRANS2 FUNCTION ------)\n"));
SET_DOSERROR(msg, SERVER, NO_SUPPORT);
return FALSE;
}
BOOL
Trans2QueryFsInfo(
Packet_t * msg,
Trans2_t * trans2
)
{
PVOID fshdl;
USHORT tid = msg->in.smb->Tid;
USHORT uid = msg->in.smb->Uid;
PVOID fsctx = SRV_GET_FS_HANDLE(msg);
FsDispatchTable* pDisp = FsGetHandle(fsctx, tid, uid, &fshdl);
fs_attr_t fsattr;
DWORD error;
PREQ_QUERY_FS_INFORMATION pReq;
SET_REQ(pReq, PREQ_QUERY_FS_INFORMATION, trans2);
if (!pDisp) {
SrvLogError(("DOSERROR: no such uid\n"));
SET_DOSERROR(msg, SERVER, BAD_UID);
return FALSE;
}
error = pDisp->FsStatfs(fshdl, &fsattr);
if (error) {
SrvLogError(("WIN32ERROR: statfs error 0x%08X\n", error));
SET_WIN32ERROR(msg, error);
return FALSE;
}
SrvLog(("statfs %s level %d %d\n",
fsattr.fs_name,
pReq->InformationLevel,
trans2->out.pResp->WordCount));
trans2->out.pResp->WordCount--;
switch (pReq->InformationLevel) {
case SMB_INFO_ALLOCATION: {
FSALLOCATE Resp;
Resp.idFileSystem = 0;
Resp.cSectorUnit = fsattr.sectors_per_unit;
Resp.cbSector = (USHORT)fsattr.bytes_per_sector;
Resp.cUnit = (ULONG)fsattr.total_units;
Resp.cUnitAvail = (ULONG)fsattr.free_units;
SrvLog(("statfs %u %u\n", Resp.cUnit, Resp.cUnitAvail));
ADD_RESP_DATA(msg, trans2, &Resp, sizeof(FSALLOCATE));
return TRUE;
}
case SMB_INFO_VOLUME: {
FSINFO Resp;
const int maxlen = sizeof(Resp.vol.szVolLabel);
Resp.ulVsn = 0xFADB;
Resp.vol.cch = min(lstrlen(fsattr.fs_name), maxlen);
lstrcpyn(Resp.vol.szVolLabel, fsattr.fs_name, maxlen);
SrvLog(("statfs name %s %d %d, %d\n",
fsattr.fs_name, Resp.vol.cch,
sizeof(FSINFO), sizeof(*msg->out.smb)));
ADD_RESP_DATA(msg, trans2, &Resp, sizeof(FSINFO));
return TRUE;
}
case SMB_QUERY_FS_VOLUME_INFO: {
const int name_len = lstrlen(fsattr.fs_name);
const USHORT size = sizeof(FILE_FS_VOLUME_INFORMATION) + name_len + 2;
PFILE_FS_VOLUME_INFORMATION pResp =
(PFILE_FS_VOLUME_INFORMATION)xmalloc(size);
pResp->VolumeCreationTime.QuadPart = 0;
pResp->VolumeSerialNumber = 0xFEED;
pResp->VolumeLabelLength = name_len * sizeof(WCHAR);
// sprintf((char*)pResp->VolumeLabel, "%S", fsattr.fs_name);
strcpy((char *)pResp->VolumeLabel, fsattr.fs_name);
ADD_RESP_DATA(msg, trans2, pResp, size);
xfree(pResp);
return TRUE;
}
default:
SrvLogError(("DOSERROR: <COULD NOT UNDERSTAND INFO LEVEL>\n"));
SET_DOSERROR(msg, SERVER, NO_SUPPORT);
return FALSE;
}
}
void
Trans2Init()
{
int i;
InitializeCriticalSection(&dLock);
memset(DirTable, 0, sizeof(DirTable));
}
dm_t *
dm_alloc()
{
int i;
dm_t *dm;
dm = (dm_t *) malloc(sizeof(*dm));
if (dm == NULL)
return NULL;
dm->handle = INVALID_HANDLE_VALUE;
dm->last = NULL;
EnterCriticalSection(&dLock);
for (i = 0; i < DirTableSz; i++) {
if (DirTable[i] == NULL) {
dm->Sid = (USHORT) i;
DirTable[i] = dm;
break;
}
}
LeaveCriticalSection(&dLock);
if (i == DirTableSz) {
free((char *) dm);
dm = NULL;
}
return dm;
}
void
dm_init(dm_t *p, USHORT _info_level, USHORT _add_res_key)
{
p->info_level = _info_level;
p->add_res_key = _add_res_key;
p->base_size = p->add_res_key ? sizeof(ULONG):0;
switch (p->info_level) {
case SMB_INFO_STANDARD:
p->base_size += sizeof(SMB_FIND_BUFFER);
break;
case SMB_INFO_QUERY_EA_SIZE:
p->base_size += sizeof(SMB_FIND_BUFFER2);
break;
case SMB_INFO_QUERY_EAS_FROM_LIST:
case SMB_FIND_FILE_DIRECTORY_INFO:
case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
case SMB_FIND_FILE_NAMES_INFO:
case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
default:
p->base_size = 0;
}
}
void
dm_free(dm_t *dm)
{
EnterCriticalSection(&dLock);
ASSERT(DirTable[dm->Sid] == dm);
DirTable[dm->Sid] = NULL;
LeaveCriticalSection(&dLock);
if (dm->last) {
free((char *) dm->last);
}
if (dm->handle != INVALID_HANDLE_VALUE) {
// printf("Closing srch hdl %x\n", dm->handle);
FindClose(dm->handle);
}
free((char *)dm);
}
dm_t *
dm_find(USHORT Sid)
{
dm_t *dm;
if (Sid >= DirTableSz) {
return NULL;
}
// no need to get lock
dm = DirTable[Sid];
ASSERT(dm != NULL);
ASSERT(dm->Sid == Sid);
return dm;
}
DWORD
dm_close(USHORT Sid)
{
dm_t *dm;
dm = dm_find(Sid);
if (dm == NULL) {
return ERROR_INVALID_HANDLE;
}
dm_free(dm);
return ERROR_SUCCESS;
}
void
dm_addentry(dm_t *dm, void* p, WIN32_FIND_DATA *entry, USHORT name_len)
{
if (dm->add_res_key) {
PULONG pl = (PULONG)p;
*pl = dm->cookie;
pl++;
p = pl;
}
switch (dm->info_level) {
case SMB_INFO_STANDARD: {
PSMB_FIND_BUFFER pResp = (PSMB_FIND_BUFFER) p;
time64_to_smb_datetime((TIME64 *)&entry->ftCreationTime,
&pResp->CreationDate.Ushort,
&pResp->CreationTime.Ushort);
time64_to_smb_datetime((TIME64 *)&entry->ftLastAccessTime,
&pResp->LastAccessDate.Ushort,
&pResp->LastAccessTime.Ushort);
time64_to_smb_datetime((TIME64 *)&entry->ftLastWriteTime,
&pResp->LastWriteDate.Ushort,
&pResp->LastWriteTime.Ushort);
pResp->DataSize = entry->nFileSizeLow;
pResp->AllocationSize = pResp->DataSize;
pResp->Attributes = attribs_to_smb_attribs(entry->dwFileAttributes);
pResp->FileNameLength = (UCHAR) name_len;
RtlCopyMemory(pResp->FileName, entry->cFileName, name_len + 1);
return;
}
case SMB_INFO_QUERY_EA_SIZE: {
PSMB_FIND_BUFFER2 pResp = (PSMB_FIND_BUFFER2) p;
time64_to_smb_datetime((TIME64 *)&entry->ftCreationTime,
&pResp->CreationDate.Ushort,
&pResp->CreationTime.Ushort);
time64_to_smb_datetime((TIME64 *)&entry->ftLastAccessTime,
&pResp->LastAccessDate.Ushort,
&pResp->LastAccessTime.Ushort);
time64_to_smb_datetime((TIME64 *)&entry->ftLastWriteTime,
&pResp->LastWriteDate.Ushort,
&pResp->LastWriteTime.Ushort);
pResp->DataSize = entry->nFileSizeLow;
pResp->AllocationSize = pResp->DataSize;
pResp->Attributes = attribs_to_smb_attribs(entry->dwFileAttributes);
pResp->EaSize = 0;
pResp->FileNameLength = (UCHAR)name_len;
RtlCopyMemory(pResp->FileName, entry->cFileName, name_len + 1);
return;
}
case SMB_INFO_QUERY_EAS_FROM_LIST:
case SMB_FIND_FILE_DIRECTORY_INFO:
case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
case SMB_FIND_FILE_NAMES_INFO:
case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
default:
return;
}
}
DWORD
bad_info_level(
Packet_t * msg
)
{
SrvLogError(("DOSERROR: <COULD NOT UNDERSTAND INFO LEVEL>\n"));
return ERROR_INVALID_FUNCTION;
}
BOOL
Trans2FindFirst2(
Packet_t * msg,
Trans2_t * trans2
)
{
PVOID fshdl;
USHORT tid;
USHORT uid;
PVOID fsctx;
FsDispatchTable* pDisp;
dm_t *dm;
WCHAR wfull_path[MAXPATH];
char *path, full_path[MAXPATH];
DWORD error;
WIN32_FIND_DATA entry;
PVOID d = 0;
PRESP_FIND_FIRST2 pResp;
PREQ_FIND_FIRST2 pReq;
if (msg == NULL || trans2 == NULL)
return FALSE;
tid = msg->in.smb->Tid;
uid = msg->in.smb->Uid;
fsctx = SRV_GET_FS_HANDLE(msg);
pDisp = FsGetHandle(fsctx, tid, uid, &fshdl);
SET_REQ(pReq, PREQ_FIND_FIRST2, trans2);
if (!pDisp) {
SrvLogError(("DOSERROR: bad uid %d\n", uid));
SET_DOSERROR(msg, SERVER, BAD_UID);
return FALSE;
}
dm = dm_alloc();
if (!dm) {
SrvLogError(("DOSERROR:dm_alloc failed\n"));
SET_WIN32ERROR(msg, ERROR_TOO_MANY_OPEN_FILES);
return FALSE;
}
dm_init(dm, pReq->InformationLevel,
pReq->Flags & SMB_FIND_RETURN_RESUME_KEYS);
if (!dm->base_size) {
dm_free(dm);
SET_WIN32ERROR(msg, bad_info_level(msg));
return FALSE;
}
path = (char*)pReq->Buffer;
// todo: Instead of using findfirst(), read whole directory and
// store it locally in a temperary buffer. That way I don't have
// to deal with a handle failing in the middle. Or, ensure that all
// reads happen on a consistent local replica.
// build our path
pDisp->FsGetRoot(fshdl, wfull_path);
// convert to ascii
full_path[0] = '\0';
error = wcstombs(full_path, wfull_path, wcslen(wfull_path));
full_path[error] = '\0';
strcat(full_path, path);
pResp = (PRESP_FIND_FIRST2)
ADD_RESP_PARAMS(msg, trans2, 0, sizeof(RESP_FIND_FIRST2));
if (!pResp) {
SrvLogError(("DOSERROR: not enough buffer space...\n"));
SET_DOSERROR(msg, SERVER, ERROR);
return FALSE;
}
dm->handle = FindFirstFile(full_path, &entry);
if (dm->handle == INVALID_HANDLE_VALUE) {
error = GetLastError();
SrvLogError(("DOSERROR: could not find filter in '%s' %d\n",full_path, error));
SET_DOSERROR(msg, SERVER, FILE_SPECS);
return FALSE;
}
// entry number 0
dm->cookie = 0;
pResp->SearchCount = 0;
dm->last = &entry;
while (msg->out.size > msg->out.valid) {
DWORD name_len;
USHORT len;
len = dm->base_size + lstrlen(entry.cFileName);
if (len <= (msg->out.size - msg->out.valid)) {
d = ADD_RESP_DATA(msg, trans2, 0, len);
dm_addentry(dm, d, &entry, len - dm->base_size);
dm->cookie++;
pResp->SearchCount++;
if (FindNextFile(dm->handle, &entry) == 0) {
error = GetLastError();
dm->last = NULL;
break;
}
} else {
// we are out of space
break;
}
}
if (dm->last != NULL) {
WIN32_FIND_DATA *p;
// we ran out of buffer space, we need to safe this entry in our dm
dm->last = NULL;
p = (WIN32_FIND_DATA *) malloc(sizeof(*p));
if (p != NULL) {
memcpy(p, &entry, sizeof(entry));
dm->last = p;
} else {
// todo: should return failure here
;
}
}
// -- common --
pResp->EndOfSearch = (error == 18)?1:0;
pResp->LastNameOffset = (pResp->EndOfSearch)?(((USHORT)((char*)d -
(char*)msg->out.smb)) -
trans2->out.pResp->DataOffset):0;
pResp->EaErrorOffset = 0;
if ((pReq->Flags & SMB_FIND_CLOSE_AFTER_REQUEST) ||
((pReq->Flags & SMB_FIND_CLOSE_AT_EOS) && pResp->EndOfSearch)) {
pResp->Sid = 0xFFFF;
dm_free(dm);
} else {
pResp->Sid = dm->Sid;
}
return TRUE;
}
BOOL
Trans2FindNext2(
Packet_t * msg,
Trans2_t * trans2
)
{
PVOID fshdl;
USHORT tid;
USHORT uid;
PVOID fsctx;
FsDispatchTable* pDisp;
DWORD error;
dm_t *dm;
PVOID d;
PRESP_FIND_NEXT2 pResp;
PREQ_FIND_NEXT2 pReq;
if (msg == NULL || trans2 == NULL)
return FALSE;
tid = msg->in.smb->Tid;
uid = msg->in.smb->Uid;
fsctx = SRV_GET_FS_HANDLE(msg);
pDisp = FsGetHandle(fsctx, tid, uid, &fshdl);
SET_REQ(pReq, PREQ_FIND_NEXT2, trans2);
if (!pDisp) {
SrvLogError(("DOSERROR: bad uid %d\n", uid));
SET_DOSERROR(msg, SERVER, BAD_UID);
return FALSE;
}
dm = dm_find(pReq->Sid);
if (dm == NULL) {
SrvLogError(("DOSERROR: could not find sid\n"));
SET_DOSERROR(msg, DOS, BAD_FID);
return FALSE;
}
dm_init(dm, pReq->InformationLevel,
pReq->Flags & SMB_FIND_RETURN_RESUME_KEYS);
if (!dm->base_size) {
SET_WIN32ERROR(msg, bad_info_level(msg));
return FALSE;
}
pResp = (PRESP_FIND_NEXT2)
ADD_RESP_PARAMS(msg, trans2, 0, sizeof(RESP_FIND_NEXT2));
if (!pResp) {
SrvLogError(("DOSERROR: not enough buffer space...\n"));
SET_DOSERROR(msg, SERVER, ERROR);
return FALSE;
}
if (!(pReq->Flags & SMB_FIND_CONTINUE_FROM_LAST))
dm->cookie = pReq->ResumeKey;
pResp->SearchCount = 0;
while (msg->out.size > msg->out.valid) {
if (dm->last) {
USHORT len;
len = lstrlen(dm->last->cFileName) + dm->base_size;
if (len <= (msg->out.size - msg->out.valid)) {
d = ADD_RESP_DATA(msg, trans2, 0, len);
dm_addentry(dm, d, dm->last, len - dm->base_size);
dm->cookie++;
pResp->SearchCount++;
} else {
break;
}
}
if (FindNextFile(dm->handle, dm->last) == 0) {
error = GetLastError();
free((char *)dm->last);
dm->last = NULL;
break;
}
}
// -- common --
pResp->EndOfSearch = (error == 18)?1:0;
pResp->LastNameOffset = (pResp->EndOfSearch)?(((USHORT)((char*)d -
(char*)msg->out.smb)) -
trans2->out.pResp->DataOffset):0;
pResp->EaErrorOffset = 0;
if (pResp->EndOfSearch) {
dm_free(dm);
}
return TRUE;
}
BOOL
Trans2QueryPathInfo(
Packet_t * msg,
Trans2_t * trans2
)
{
PVOID fshdl;
USHORT tid;
USHORT uid;
PVOID fsctx;
FsDispatchTable* pDisp;
PREQ_QUERY_PATH_INFORMATION pReq;
PCHAR file_name;
LPWSTR name;
int name_len;
DWORD error;
fattr_t attribs;
if (msg == NULL)
return FALSE;
tid = msg->in.smb->Tid;
uid = msg->in.smb->Uid;
fsctx = SRV_GET_FS_HANDLE(msg);
pDisp = FsGetHandle(fsctx, tid, uid, &fshdl);
SET_REQ(pReq, PREQ_QUERY_PATH_INFORMATION, trans2);
if (!pDisp) {
SrvLogError(("Srv: no such uid\n"));
SET_DOSERROR(msg, SERVER, BAD_UID);
return FALSE;
}
file_name = (PCHAR)pReq->Buffer;
// convert to unicode
SRV_ASCII_TO_WCHAR(name, name_len, file_name, lstrlen(file_name));
if (name != NULL)
error = pDisp->FsLookup(fshdl, name, (USHORT) name_len, &attribs);
else
error = ERROR_NOT_ENOUGH_MEMORY;
SRV_ASCII_FREE(name);
if (error) {
SrvLogError(("Srv: lookup error 0x%08X\n", error));
SET_WIN32ERROR(msg, error);
ADD_RESP_DATA(msg, trans2, NULL, 0);
return FALSE;
}
switch(pReq->InformationLevel) {
case SMB_INFO_STANDARD: {
USHORT len = sizeof(SMB_FIND_BUFFER) - sizeof(UCHAR) - sizeof(CHAR);
PSMB_FIND_BUFFER pResp = (PSMB_FIND_BUFFER) xmalloc(len);
if (pResp == NULL) {
SET_WIN32ERROR(msg, ERROR_NOT_ENOUGH_MEMORY);
ADD_RESP_DATA(msg, trans2, NULL, 0);
return FALSE;
}
time64_to_smb_datetime(&attribs.create_time,
&pResp->CreationDate.Ushort,
&pResp->CreationTime.Ushort);
time64_to_smb_datetime(&attribs.access_time,
&pResp->LastAccessDate.Ushort,
&pResp->LastAccessTime.Ushort);
time64_to_smb_datetime(&attribs.mod_time,
&pResp->LastWriteDate.Ushort,
&pResp->LastWriteTime.Ushort);
pResp->DataSize = (ULONG)attribs.file_size;
pResp->AllocationSize = (ULONG)attribs.alloc_size;
pResp->Attributes = attribs_to_smb_attribs(attribs.attributes);
ADD_RESP_DATA(msg, trans2, pResp, len);
xfree(pResp);
return TRUE;
}
case SMB_INFO_QUERY_EA_SIZE: {
USHORT len = sizeof(SMB_FIND_BUFFER2) - sizeof(UCHAR) - sizeof(CHAR);
PSMB_FIND_BUFFER2 pResp = (PSMB_FIND_BUFFER2) xmalloc(len);
if (pResp == NULL) {
SET_WIN32ERROR(msg, ERROR_NOT_ENOUGH_MEMORY);
ADD_RESP_DATA(msg, trans2, NULL, 0);
return FALSE;
}
time64_to_smb_datetime(&attribs.create_time,
&pResp->CreationDate.Ushort,
&pResp->CreationTime.Ushort);
time64_to_smb_datetime(&attribs.access_time,
&pResp->LastAccessDate.Ushort,
&pResp->LastAccessTime.Ushort);
time64_to_smb_datetime(&attribs.mod_time,
&pResp->LastWriteDate.Ushort,
&pResp->LastWriteTime.Ushort);
pResp->DataSize = (ULONG)attribs.file_size;
pResp->AllocationSize = (ULONG)attribs.alloc_size;
pResp->Attributes = attribs_to_smb_attribs(attribs.attributes);
pResp->EaSize = 0;
ADD_RESP_DATA(msg, trans2, pResp, len);
xfree(pResp);
return TRUE;
}
case SMB_INFO_QUERY_EAS_FROM_LIST:
case SMB_FIND_FILE_DIRECTORY_INFO:
case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
case SMB_FIND_FILE_NAMES_INFO:
case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
default: {
SrvLogError(("Srv: unsupported info level %d>\n"
,pReq->InformationLevel));
SET_DOSERROR(msg, SERVER, NO_SUPPORT);
return FALSE;
}
}
}
BOOL
Trans2SetPathInfo(
Packet_t * msg,
Trans2_t * trans2
)
{
return Trans2Unknown(msg, trans2);
}
BOOL
Trans2QueryFileInfo(
Packet_t * msg,
Trans2_t * trans2
)
{
return Trans2Unknown(msg, trans2);
}
BOOL
Trans2SetFileInfo(
Packet_t * msg,
Trans2_t * trans2
)
{
return Trans2Unknown(msg, trans2);
}
BOOL
Trans2GetDfsReferral(
Packet_t * msg,
Trans2_t * trans2
)
{
return Trans2Unknown(msg, trans2);
}