mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
926379ae79
metze
462 lines
13 KiB
C
462 lines
13 KiB
C
/*
|
|
Unix SMB/CIFS implementation.
|
|
Core SMB2 server
|
|
|
|
Copyright (C) Stefan Metzmacher 2009
|
|
|
|
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; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
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 <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
#include "smbd/smbd.h"
|
|
#include "smbd/globals.h"
|
|
#include "../libcli/smb/smb_common.h"
|
|
#include "trans2.h"
|
|
#include "../lib/util/tevent_ntstatus.h"
|
|
|
|
static struct tevent_req *smbd_smb2_find_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct smbd_smb2_request *smb2req,
|
|
struct files_struct *in_fsp,
|
|
uint8_t in_file_info_class,
|
|
uint8_t in_flags,
|
|
uint32_t in_file_index,
|
|
uint32_t in_output_buffer_length,
|
|
const char *in_file_name);
|
|
static NTSTATUS smbd_smb2_find_recv(struct tevent_req *req,
|
|
TALLOC_CTX *mem_ctx,
|
|
DATA_BLOB *out_output_buffer);
|
|
|
|
static void smbd_smb2_request_find_done(struct tevent_req *subreq);
|
|
NTSTATUS smbd_smb2_request_process_find(struct smbd_smb2_request *req)
|
|
{
|
|
NTSTATUS status;
|
|
const uint8_t *inbody;
|
|
uint8_t in_file_info_class;
|
|
uint8_t in_flags;
|
|
uint32_t in_file_index;
|
|
uint64_t in_file_id_persistent;
|
|
uint64_t in_file_id_volatile;
|
|
struct files_struct *in_fsp;
|
|
uint16_t in_file_name_offset;
|
|
uint16_t in_file_name_length;
|
|
DATA_BLOB in_file_name_buffer;
|
|
char *in_file_name_string;
|
|
size_t in_file_name_string_size;
|
|
uint32_t in_output_buffer_length;
|
|
struct tevent_req *subreq;
|
|
bool ok;
|
|
|
|
status = smbd_smb2_request_verify_sizes(req, 0x21);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return smbd_smb2_request_error(req, status);
|
|
}
|
|
inbody = SMBD_SMB2_IN_BODY_PTR(req);
|
|
|
|
in_file_info_class = CVAL(inbody, 0x02);
|
|
in_flags = CVAL(inbody, 0x03);
|
|
in_file_index = IVAL(inbody, 0x04);
|
|
in_file_id_persistent = BVAL(inbody, 0x08);
|
|
in_file_id_volatile = BVAL(inbody, 0x10);
|
|
in_file_name_offset = SVAL(inbody, 0x18);
|
|
in_file_name_length = SVAL(inbody, 0x1A);
|
|
in_output_buffer_length = IVAL(inbody, 0x1C);
|
|
|
|
if (in_file_name_offset == 0 && in_file_name_length == 0) {
|
|
/* This is ok */
|
|
} else if (in_file_name_offset !=
|
|
(SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
|
|
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
|
|
}
|
|
|
|
if (in_file_name_length > SMBD_SMB2_IN_DYN_LEN(req)) {
|
|
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
|
|
}
|
|
|
|
/* The output header is 8 bytes. */
|
|
if (in_output_buffer_length <= 8) {
|
|
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
|
|
}
|
|
|
|
DEBUG(10,("smbd_smb2_request_find_done: in_output_buffer_length = %u\n",
|
|
(unsigned int)in_output_buffer_length ));
|
|
|
|
/* Take into account the output header. */
|
|
in_output_buffer_length -= 8;
|
|
|
|
in_file_name_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
|
|
in_file_name_buffer.length = in_file_name_length;
|
|
|
|
ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
|
|
in_file_name_buffer.data,
|
|
in_file_name_buffer.length,
|
|
&in_file_name_string,
|
|
&in_file_name_string_size);
|
|
if (!ok) {
|
|
return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
|
|
}
|
|
|
|
if (in_file_name_buffer.length == 0) {
|
|
in_file_name_string_size = 0;
|
|
}
|
|
|
|
if (strlen(in_file_name_string) != in_file_name_string_size) {
|
|
return smbd_smb2_request_error(req, NT_STATUS_OBJECT_NAME_INVALID);
|
|
}
|
|
|
|
in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
|
|
if (in_fsp == NULL) {
|
|
return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
|
|
}
|
|
|
|
subreq = smbd_smb2_find_send(req, req->sconn->ev_ctx,
|
|
req, in_fsp,
|
|
in_file_info_class,
|
|
in_flags,
|
|
in_file_index,
|
|
in_output_buffer_length,
|
|
in_file_name_string);
|
|
if (subreq == NULL) {
|
|
return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
|
|
}
|
|
tevent_req_set_callback(subreq, smbd_smb2_request_find_done, req);
|
|
|
|
return smbd_smb2_request_pending_queue(req, subreq, 500);
|
|
}
|
|
|
|
static void smbd_smb2_request_find_done(struct tevent_req *subreq)
|
|
{
|
|
struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
|
|
struct smbd_smb2_request);
|
|
DATA_BLOB outbody;
|
|
DATA_BLOB outdyn;
|
|
uint16_t out_output_buffer_offset;
|
|
DATA_BLOB out_output_buffer = data_blob_null;
|
|
NTSTATUS status;
|
|
NTSTATUS error; /* transport error */
|
|
|
|
status = smbd_smb2_find_recv(subreq,
|
|
req,
|
|
&out_output_buffer);
|
|
TALLOC_FREE(subreq);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
error = smbd_smb2_request_error(req, status);
|
|
if (!NT_STATUS_IS_OK(error)) {
|
|
smbd_server_connection_terminate(req->sconn,
|
|
nt_errstr(error));
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
|
|
|
|
outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
|
|
if (outbody.data == NULL) {
|
|
error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
|
|
if (!NT_STATUS_IS_OK(error)) {
|
|
smbd_server_connection_terminate(req->sconn,
|
|
nt_errstr(error));
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
|
|
SSVAL(outbody.data, 0x02,
|
|
out_output_buffer_offset); /* output buffer offset */
|
|
SIVAL(outbody.data, 0x04,
|
|
out_output_buffer.length); /* output buffer length */
|
|
|
|
DEBUG(10,("smbd_smb2_request_find_done: out_output_buffer.length = %u\n",
|
|
(unsigned int)out_output_buffer.length ));
|
|
|
|
outdyn = out_output_buffer;
|
|
|
|
error = smbd_smb2_request_done(req, outbody, &outdyn);
|
|
if (!NT_STATUS_IS_OK(error)) {
|
|
smbd_server_connection_terminate(req->sconn,
|
|
nt_errstr(error));
|
|
return;
|
|
}
|
|
}
|
|
|
|
struct smbd_smb2_find_state {
|
|
struct smbd_smb2_request *smb2req;
|
|
DATA_BLOB out_output_buffer;
|
|
};
|
|
|
|
static struct tevent_req *smbd_smb2_find_send(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct smbd_smb2_request *smb2req,
|
|
struct files_struct *fsp,
|
|
uint8_t in_file_info_class,
|
|
uint8_t in_flags,
|
|
uint32_t in_file_index,
|
|
uint32_t in_output_buffer_length,
|
|
const char *in_file_name)
|
|
{
|
|
struct tevent_req *req;
|
|
struct smbd_smb2_find_state *state;
|
|
struct smb_request *smbreq;
|
|
connection_struct *conn = smb2req->tcon->compat;
|
|
NTSTATUS status;
|
|
NTSTATUS empty_status;
|
|
uint32_t info_level;
|
|
uint32_t max_count;
|
|
char *pdata;
|
|
char *base_data;
|
|
char *end_data;
|
|
int last_entry_off = 0;
|
|
int off = 0;
|
|
uint32_t num = 0;
|
|
uint32_t dirtype = FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_DIRECTORY;
|
|
bool dont_descend = false;
|
|
bool ask_sharemode = true;
|
|
|
|
req = tevent_req_create(mem_ctx, &state,
|
|
struct smbd_smb2_find_state);
|
|
if (req == NULL) {
|
|
return NULL;
|
|
}
|
|
state->smb2req = smb2req;
|
|
state->out_output_buffer = data_blob_null;
|
|
|
|
DEBUG(10,("smbd_smb2_find_send: %s - %s\n",
|
|
fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
|
|
|
|
smbreq = smbd_smb2_fake_smb_request(smb2req);
|
|
if (tevent_req_nomem(smbreq, req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
if (!fsp->is_directory) {
|
|
tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
if (strcmp(in_file_name, "") == 0) {
|
|
tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
if (strcmp(in_file_name, "\\") == 0) {
|
|
tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
if (strcmp(in_file_name, "/") == 0) {
|
|
tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_INVALID);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
if (in_output_buffer_length > smb2req->sconn->smb2.max_trans) {
|
|
DEBUG(2,("smbd_smb2_find_send: "
|
|
"client ignored max trans:%s: 0x%08X: 0x%08X\n",
|
|
__location__, in_output_buffer_length,
|
|
smb2req->sconn->smb2.max_trans));
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
status = smbd_smb2_request_verify_creditcharge(smb2req,
|
|
in_output_buffer_length);
|
|
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
switch (in_file_info_class) {
|
|
case SMB2_FIND_DIRECTORY_INFO:
|
|
info_level = SMB_FIND_FILE_DIRECTORY_INFO;
|
|
break;
|
|
|
|
case SMB2_FIND_FULL_DIRECTORY_INFO:
|
|
info_level = SMB_FIND_FILE_FULL_DIRECTORY_INFO;
|
|
break;
|
|
|
|
case SMB2_FIND_BOTH_DIRECTORY_INFO:
|
|
info_level = SMB_FIND_FILE_BOTH_DIRECTORY_INFO;
|
|
break;
|
|
|
|
case SMB2_FIND_NAME_INFO:
|
|
info_level = SMB_FIND_FILE_NAMES_INFO;
|
|
break;
|
|
|
|
case SMB2_FIND_ID_BOTH_DIRECTORY_INFO:
|
|
info_level = SMB_FIND_ID_BOTH_DIRECTORY_INFO;
|
|
break;
|
|
|
|
case SMB2_FIND_ID_FULL_DIRECTORY_INFO:
|
|
info_level = SMB_FIND_ID_FULL_DIRECTORY_INFO;
|
|
break;
|
|
|
|
default:
|
|
tevent_req_nterror(req, NT_STATUS_INVALID_INFO_CLASS);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
if (in_flags & SMB2_CONTINUE_FLAG_REOPEN) {
|
|
dptr_CloseDir(fsp);
|
|
}
|
|
|
|
if (fsp->dptr == NULL) {
|
|
bool wcard_has_wild;
|
|
|
|
wcard_has_wild = ms_has_wild(in_file_name);
|
|
|
|
status = dptr_create(conn,
|
|
NULL, /* req */
|
|
fsp,
|
|
fsp->fsp_name->base_name,
|
|
false, /* old_handle */
|
|
false, /* expect_close */
|
|
0, /* spid */
|
|
in_file_name, /* wcard */
|
|
wcard_has_wild,
|
|
dirtype,
|
|
&fsp->dptr);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
tevent_req_nterror(req, status);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
empty_status = NT_STATUS_NO_SUCH_FILE;
|
|
} else {
|
|
empty_status = STATUS_NO_MORE_FILES;
|
|
}
|
|
|
|
if (in_flags & SMB2_CONTINUE_FLAG_RESTART) {
|
|
dptr_SeekDir(fsp->dptr, 0);
|
|
}
|
|
|
|
if (in_flags & SMB2_CONTINUE_FLAG_SINGLE) {
|
|
max_count = 1;
|
|
} else {
|
|
max_count = UINT16_MAX;
|
|
}
|
|
|
|
#define DIR_ENTRY_SAFETY_MARGIN 4096
|
|
|
|
state->out_output_buffer = data_blob_talloc(state, NULL,
|
|
in_output_buffer_length + DIR_ENTRY_SAFETY_MARGIN);
|
|
if (tevent_req_nomem(state->out_output_buffer.data, req)) {
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
state->out_output_buffer.length = 0;
|
|
pdata = (char *)state->out_output_buffer.data;
|
|
base_data = pdata;
|
|
/*
|
|
* end_data must include the safety margin as it's what is
|
|
* used to determine if pushed strings have been truncated.
|
|
*/
|
|
end_data = pdata + in_output_buffer_length + DIR_ENTRY_SAFETY_MARGIN - 1;
|
|
last_entry_off = 0;
|
|
off = 0;
|
|
num = 0;
|
|
|
|
DEBUG(8,("smbd_smb2_find_send: dirpath=<%s> dontdescend=<%s>, "
|
|
"in_output_buffer_length = %u\n",
|
|
fsp->fsp_name->base_name, lp_dontdescend(talloc_tos(), SNUM(conn)),
|
|
(unsigned int)in_output_buffer_length ));
|
|
if (in_list(fsp->fsp_name->base_name,lp_dontdescend(talloc_tos(), SNUM(conn)),
|
|
conn->case_sensitive)) {
|
|
dont_descend = true;
|
|
}
|
|
|
|
ask_sharemode = lp_parm_bool(SNUM(conn),
|
|
"smbd", "search ask sharemode",
|
|
true);
|
|
|
|
while (true) {
|
|
bool ok;
|
|
bool got_exact_match = false;
|
|
bool out_of_space = false;
|
|
int space_remaining = in_output_buffer_length - off;
|
|
|
|
SMB_ASSERT(space_remaining >= 0);
|
|
|
|
ok = smbd_dirptr_lanman2_entry(state,
|
|
conn,
|
|
fsp->dptr,
|
|
smbreq->flags2,
|
|
in_file_name,
|
|
dirtype,
|
|
info_level,
|
|
false, /* requires_resume_key */
|
|
dont_descend,
|
|
ask_sharemode,
|
|
8, /* align to 8 bytes */
|
|
false, /* no padding */
|
|
&pdata,
|
|
base_data,
|
|
end_data,
|
|
space_remaining,
|
|
&out_of_space,
|
|
&got_exact_match,
|
|
&last_entry_off,
|
|
NULL);
|
|
|
|
off = (int)PTR_DIFF(pdata, base_data);
|
|
|
|
if (!ok) {
|
|
if (num > 0) {
|
|
SIVAL(state->out_output_buffer.data, last_entry_off, 0);
|
|
tevent_req_done(req);
|
|
return tevent_req_post(req, ev);
|
|
} else if (out_of_space) {
|
|
tevent_req_nterror(req, NT_STATUS_INFO_LENGTH_MISMATCH);
|
|
return tevent_req_post(req, ev);
|
|
} else {
|
|
tevent_req_nterror(req, empty_status);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
}
|
|
|
|
num++;
|
|
state->out_output_buffer.length = off;
|
|
|
|
if (num < max_count) {
|
|
continue;
|
|
}
|
|
|
|
SIVAL(state->out_output_buffer.data, last_entry_off, 0);
|
|
tevent_req_done(req);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
|
|
return tevent_req_post(req, ev);
|
|
}
|
|
|
|
static NTSTATUS smbd_smb2_find_recv(struct tevent_req *req,
|
|
TALLOC_CTX *mem_ctx,
|
|
DATA_BLOB *out_output_buffer)
|
|
{
|
|
NTSTATUS status;
|
|
struct smbd_smb2_find_state *state = tevent_req_data(req,
|
|
struct smbd_smb2_find_state);
|
|
|
|
if (tevent_req_is_nterror(req, &status)) {
|
|
tevent_req_received(req);
|
|
return status;
|
|
}
|
|
|
|
*out_output_buffer = state->out_output_buffer;
|
|
talloc_steal(mem_ctx, out_output_buffer->data);
|
|
|
|
tevent_req_received(req);
|
|
return NT_STATUS_OK;
|
|
}
|