mirror of
https://github.com/samba-team/samba.git
synced 2024-12-22 13:34:15 +03:00
4498d07e73
Signed-off-by: Andreas Schneider <asn@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
504 lines
13 KiB
C
504 lines
13 KiB
C
/*
|
|
Unix SMB/CIFS implementation.
|
|
Pipe SMB reply routines
|
|
Copyright (C) Andrew Tridgell 1992-1998
|
|
Copyright (C) Luke Kenneth Casson Leighton 1996-1998
|
|
Copyright (C) Paul Ashton 1997-1998.
|
|
Copyright (C) Jeremy Allison 2005.
|
|
|
|
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/>.
|
|
*/
|
|
/*
|
|
This file handles reply_ calls on named pipes that the server
|
|
makes to handle specific protocols
|
|
*/
|
|
|
|
|
|
#include "includes.h"
|
|
#include "smbd/smbd.h"
|
|
#include "smbd/globals.h"
|
|
#include "libcli/security/security.h"
|
|
#include "rpc_server/srv_pipe_hnd.h"
|
|
|
|
NTSTATUS open_np_file(struct smb_request *smb_req, const char *name,
|
|
struct files_struct **pfsp)
|
|
{
|
|
struct connection_struct *conn = smb_req->conn;
|
|
struct files_struct *fsp;
|
|
struct smb_filename *smb_fname = NULL;
|
|
NTSTATUS status;
|
|
|
|
status = file_new(smb_req, conn, &fsp);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0, ("file_new failed: %s\n", nt_errstr(status)));
|
|
return status;
|
|
}
|
|
|
|
fsp->conn = conn;
|
|
fsp->fh->fd = -1;
|
|
fsp->vuid = smb_req->vuid;
|
|
fsp->can_lock = false;
|
|
fsp->access_mask = FILE_READ_DATA | FILE_WRITE_DATA;
|
|
|
|
smb_fname = synthetic_smb_fname(talloc_tos(), name, NULL, NULL);
|
|
if (smb_fname == NULL) {
|
|
file_free(smb_req, fsp);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
status = fsp_set_smb_fname(fsp, smb_fname);
|
|
TALLOC_FREE(smb_fname);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
file_free(smb_req, fsp);
|
|
return status;
|
|
}
|
|
|
|
status = np_open(fsp, name,
|
|
conn->sconn->local_address,
|
|
conn->sconn->remote_address,
|
|
conn->session_info,
|
|
conn->sconn->ev_ctx,
|
|
conn->sconn->msg_ctx,
|
|
&fsp->fake_file_handle);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(10, ("np_open(%s) returned %s\n", name,
|
|
nt_errstr(status)));
|
|
file_free(smb_req, fsp);
|
|
return status;
|
|
}
|
|
|
|
*pfsp = fsp;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
Reply to an open and X on a named pipe.
|
|
This code is basically stolen from reply_open_and_X with some
|
|
wrinkles to handle pipes.
|
|
****************************************************************************/
|
|
|
|
void reply_open_pipe_and_X(connection_struct *conn, struct smb_request *req)
|
|
{
|
|
const char *fname = NULL;
|
|
char *pipe_name = NULL;
|
|
files_struct *fsp;
|
|
TALLOC_CTX *ctx = talloc_tos();
|
|
NTSTATUS status;
|
|
|
|
/* XXXX we need to handle passed times, sattr and flags */
|
|
srvstr_pull_req_talloc(ctx, req, &pipe_name, req->buf, STR_TERMINATE);
|
|
if (!pipe_name) {
|
|
reply_botherror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND,
|
|
ERRDOS, ERRbadpipe);
|
|
return;
|
|
}
|
|
|
|
/* If the name doesn't start \PIPE\ then this is directed */
|
|
/* at a mailslot or something we really, really don't understand, */
|
|
/* not just something we really don't understand. */
|
|
|
|
#define PIPE "PIPE\\"
|
|
#define PIPELEN strlen(PIPE)
|
|
|
|
fname = pipe_name;
|
|
while (fname[0] == '\\') {
|
|
fname++;
|
|
}
|
|
if (!strnequal(fname, PIPE, PIPELEN)) {
|
|
reply_nterror(req, NT_STATUS_OBJECT_PATH_SYNTAX_BAD);
|
|
return;
|
|
}
|
|
fname += PIPELEN;
|
|
while (fname[0] == '\\') {
|
|
fname++;
|
|
}
|
|
|
|
DEBUG(4,("Opening pipe %s => %s.\n", pipe_name, fname));
|
|
|
|
#if 0
|
|
/*
|
|
* Hack for NT printers... JRA.
|
|
*/
|
|
if(should_fail_next_srvsvc_open(fname)) {
|
|
reply_nterror(req, NT_STATUS_ACCESS_DENIED);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
status = open_np_file(req, fname, &fsp);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
|
|
reply_botherror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND,
|
|
ERRDOS, ERRbadpipe);
|
|
return;
|
|
}
|
|
reply_nterror(req, status);
|
|
return;
|
|
}
|
|
|
|
/* Prepare the reply */
|
|
reply_outbuf(req, 15, 0);
|
|
|
|
SSVAL(req->outbuf, smb_vwv0, 0xff); /* andx chain ends */
|
|
SSVAL(req->outbuf, smb_vwv1, 0); /* no andx offset */
|
|
|
|
/* Mark the opened file as an existing named pipe in message mode. */
|
|
SSVAL(req->outbuf,smb_vwv9,2);
|
|
SSVAL(req->outbuf,smb_vwv10,0xc700);
|
|
|
|
SSVAL(req->outbuf, smb_vwv2, fsp->fnum);
|
|
SSVAL(req->outbuf, smb_vwv3, 0); /* fmode */
|
|
srv_put_dos_date3((char *)req->outbuf, smb_vwv4, 0); /* mtime */
|
|
SIVAL(req->outbuf, smb_vwv6, 0); /* size */
|
|
SSVAL(req->outbuf, smb_vwv8, 0); /* rmode */
|
|
SSVAL(req->outbuf, smb_vwv11, 0x0001);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Reply to a write on a pipe.
|
|
****************************************************************************/
|
|
|
|
struct pipe_write_state {
|
|
size_t numtowrite;
|
|
};
|
|
|
|
static void pipe_write_done(struct tevent_req *subreq);
|
|
|
|
void reply_pipe_write(struct smb_request *req)
|
|
{
|
|
files_struct *fsp = file_fsp(req, SVAL(req->vwv+0, 0));
|
|
const uint8_t *data;
|
|
struct pipe_write_state *state;
|
|
struct tevent_req *subreq;
|
|
|
|
if (!fsp_is_np(fsp)) {
|
|
reply_nterror(req, NT_STATUS_INVALID_HANDLE);
|
|
return;
|
|
}
|
|
|
|
if (fsp->vuid != req->vuid) {
|
|
reply_nterror(req, NT_STATUS_INVALID_HANDLE);
|
|
return;
|
|
}
|
|
|
|
state = talloc(req, struct pipe_write_state);
|
|
if (state == NULL) {
|
|
reply_nterror(req, NT_STATUS_NO_MEMORY);
|
|
return;
|
|
}
|
|
req->async_priv = state;
|
|
|
|
state->numtowrite = SVAL(req->vwv+1, 0);
|
|
|
|
data = req->buf + 3;
|
|
|
|
DEBUG(6, ("reply_pipe_write: %s, name: %s len: %d\n", fsp_fnum_dbg(fsp),
|
|
fsp_str_dbg(fsp), (int)state->numtowrite));
|
|
|
|
subreq = np_write_send(state, req->sconn->ev_ctx,
|
|
fsp->fake_file_handle, data, state->numtowrite);
|
|
if (subreq == NULL) {
|
|
TALLOC_FREE(state);
|
|
reply_nterror(req, NT_STATUS_NO_MEMORY);
|
|
return;
|
|
}
|
|
tevent_req_set_callback(subreq, pipe_write_done,
|
|
talloc_move(req->conn, &req));
|
|
}
|
|
|
|
static void pipe_write_done(struct tevent_req *subreq)
|
|
{
|
|
struct smb_request *req = tevent_req_callback_data(
|
|
subreq, struct smb_request);
|
|
struct pipe_write_state *state = talloc_get_type_abort(
|
|
req->async_priv, struct pipe_write_state);
|
|
NTSTATUS status;
|
|
ssize_t nwritten = -1;
|
|
|
|
status = np_write_recv(subreq, &nwritten);
|
|
TALLOC_FREE(subreq);
|
|
if (nwritten < 0) {
|
|
reply_nterror(req, status);
|
|
goto send;
|
|
}
|
|
|
|
/* Looks bogus to me now. Needs to be removed ? JRA. */
|
|
if ((nwritten == 0 && state->numtowrite != 0)) {
|
|
reply_nterror(req, NT_STATUS_ACCESS_DENIED);
|
|
goto send;
|
|
}
|
|
|
|
reply_outbuf(req, 1, 0);
|
|
|
|
SSVAL(req->outbuf,smb_vwv0,nwritten);
|
|
|
|
DEBUG(3,("write-IPC nwritten=%d\n", (int)nwritten));
|
|
|
|
send:
|
|
if (!srv_send_smb(req->sconn, (char *)req->outbuf,
|
|
true, req->seqnum+1,
|
|
IS_CONN_ENCRYPTED(req->conn)||req->encrypted,
|
|
&req->pcd)) {
|
|
exit_server_cleanly("construct_reply: srv_send_smb failed.");
|
|
}
|
|
TALLOC_FREE(req);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Reply to a write and X.
|
|
|
|
This code is basically stolen from reply_write_and_X with some
|
|
wrinkles to handle pipes.
|
|
****************************************************************************/
|
|
|
|
struct pipe_write_andx_state {
|
|
bool pipe_start_message_raw;
|
|
size_t numtowrite;
|
|
};
|
|
|
|
static void pipe_write_andx_done(struct tevent_req *subreq);
|
|
|
|
void reply_pipe_write_and_X(struct smb_request *req)
|
|
{
|
|
files_struct *fsp = file_fsp(req, SVAL(req->vwv+2, 0));
|
|
int smb_doff = SVAL(req->vwv+11, 0);
|
|
const uint8_t *data;
|
|
struct pipe_write_andx_state *state;
|
|
struct tevent_req *subreq;
|
|
|
|
if (!fsp_is_np(fsp)) {
|
|
reply_nterror(req, NT_STATUS_INVALID_HANDLE);
|
|
return;
|
|
}
|
|
|
|
if (fsp->vuid != req->vuid) {
|
|
reply_nterror(req, NT_STATUS_INVALID_HANDLE);
|
|
return;
|
|
}
|
|
|
|
state = talloc(req, struct pipe_write_andx_state);
|
|
if (state == NULL) {
|
|
reply_nterror(req, NT_STATUS_NO_MEMORY);
|
|
return;
|
|
}
|
|
req->async_priv = state;
|
|
|
|
state->numtowrite = SVAL(req->vwv+10, 0);
|
|
state->pipe_start_message_raw =
|
|
((SVAL(req->vwv+7, 0) & (PIPE_START_MESSAGE|PIPE_RAW_MODE))
|
|
== (PIPE_START_MESSAGE|PIPE_RAW_MODE));
|
|
|
|
DEBUG(6, ("reply_pipe_write_and_X: %s, name: %s len: %d\n",
|
|
fsp_fnum_dbg(fsp), fsp_str_dbg(fsp), (int)state->numtowrite));
|
|
|
|
data = (const uint8_t *)smb_base(req->inbuf) + smb_doff;
|
|
|
|
if (state->pipe_start_message_raw) {
|
|
/*
|
|
* For the start of a message in named pipe byte mode,
|
|
* the first two bytes are a length-of-pdu field. Ignore
|
|
* them (we don't trust the client). JRA.
|
|
*/
|
|
if (state->numtowrite < 2) {
|
|
DEBUG(0,("reply_pipe_write_and_X: start of message "
|
|
"set and not enough data sent.(%u)\n",
|
|
(unsigned int)state->numtowrite ));
|
|
reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
|
|
return;
|
|
}
|
|
|
|
data += 2;
|
|
state->numtowrite -= 2;
|
|
}
|
|
|
|
subreq = np_write_send(state, req->sconn->ev_ctx,
|
|
fsp->fake_file_handle, data, state->numtowrite);
|
|
if (subreq == NULL) {
|
|
TALLOC_FREE(state);
|
|
reply_nterror(req, NT_STATUS_NO_MEMORY);
|
|
return;
|
|
}
|
|
tevent_req_set_callback(subreq, pipe_write_andx_done,
|
|
talloc_move(req->conn, &req));
|
|
}
|
|
|
|
static void pipe_write_andx_done(struct tevent_req *subreq)
|
|
{
|
|
struct smb_request *req = tevent_req_callback_data(
|
|
subreq, struct smb_request);
|
|
struct pipe_write_andx_state *state = talloc_get_type_abort(
|
|
req->async_priv, struct pipe_write_andx_state);
|
|
NTSTATUS status;
|
|
ssize_t nwritten = -1;
|
|
|
|
status = np_write_recv(subreq, &nwritten);
|
|
TALLOC_FREE(subreq);
|
|
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
reply_nterror(req, status);
|
|
goto done;
|
|
}
|
|
|
|
/* Looks bogus to me now. Is this error message correct ? JRA. */
|
|
if (nwritten != state->numtowrite) {
|
|
reply_nterror(req, NT_STATUS_ACCESS_DENIED);
|
|
goto done;
|
|
}
|
|
|
|
reply_outbuf(req, 6, 0);
|
|
|
|
SSVAL(req->outbuf, smb_vwv0, 0xff); /* andx chain ends */
|
|
SSVAL(req->outbuf, smb_vwv1, 0); /* no andx offset */
|
|
|
|
nwritten = (state->pipe_start_message_raw ? nwritten + 2 : nwritten);
|
|
SSVAL(req->outbuf,smb_vwv2,nwritten);
|
|
|
|
DEBUG(3,("writeX-IPC nwritten=%d\n", (int)nwritten));
|
|
|
|
done:
|
|
/*
|
|
* We must free here as the ownership of req was
|
|
* moved to the connection struct in reply_pipe_write_and_X().
|
|
*/
|
|
smb_request_done(req);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Reply to a read and X.
|
|
This code is basically stolen from reply_read_and_X with some
|
|
wrinkles to handle pipes.
|
|
****************************************************************************/
|
|
|
|
struct pipe_read_andx_state {
|
|
uint8_t *outbuf;
|
|
int smb_mincnt;
|
|
int smb_maxcnt;
|
|
};
|
|
|
|
static void pipe_read_andx_done(struct tevent_req *subreq);
|
|
|
|
void reply_pipe_read_and_X(struct smb_request *req)
|
|
{
|
|
files_struct *fsp = file_fsp(req, SVAL(req->vwv+0, 0));
|
|
uint8_t *data;
|
|
struct pipe_read_andx_state *state;
|
|
struct tevent_req *subreq;
|
|
|
|
/* we don't use the offset given to use for pipe reads. This
|
|
is deliberate, instead we always return the next lump of
|
|
data on the pipe */
|
|
#if 0
|
|
uint32 smb_offs = IVAL(req->vwv+3, 0);
|
|
#endif
|
|
|
|
if (!fsp_is_np(fsp)) {
|
|
reply_nterror(req, NT_STATUS_INVALID_HANDLE);
|
|
return;
|
|
}
|
|
|
|
if (fsp->vuid != req->vuid) {
|
|
reply_nterror(req, NT_STATUS_INVALID_HANDLE);
|
|
return;
|
|
}
|
|
|
|
state = talloc(req, struct pipe_read_andx_state);
|
|
if (state == NULL) {
|
|
reply_nterror(req, NT_STATUS_NO_MEMORY);
|
|
return;
|
|
}
|
|
req->async_priv = state;
|
|
|
|
state->smb_maxcnt = SVAL(req->vwv+5, 0);
|
|
state->smb_mincnt = SVAL(req->vwv+6, 0);
|
|
|
|
reply_outbuf(req, 12, state->smb_maxcnt);
|
|
SSVAL(req->outbuf, smb_vwv0, 0xff); /* andx chain ends */
|
|
SSVAL(req->outbuf, smb_vwv1, 0); /* no andx offset */
|
|
|
|
data = (uint8_t *)smb_buf(req->outbuf);
|
|
|
|
/*
|
|
* We have to tell the upper layers that we're async.
|
|
*/
|
|
state->outbuf = req->outbuf;
|
|
req->outbuf = NULL;
|
|
|
|
subreq = np_read_send(state, req->sconn->ev_ctx,
|
|
fsp->fake_file_handle, data,
|
|
state->smb_maxcnt);
|
|
if (subreq == NULL) {
|
|
reply_nterror(req, NT_STATUS_NO_MEMORY);
|
|
return;
|
|
}
|
|
tevent_req_set_callback(subreq, pipe_read_andx_done,
|
|
talloc_move(req->conn, &req));
|
|
}
|
|
|
|
static void pipe_read_andx_done(struct tevent_req *subreq)
|
|
{
|
|
struct smb_request *req = tevent_req_callback_data(
|
|
subreq, struct smb_request);
|
|
struct pipe_read_andx_state *state = talloc_get_type_abort(
|
|
req->async_priv, struct pipe_read_andx_state);
|
|
NTSTATUS status;
|
|
ssize_t nread;
|
|
bool is_data_outstanding;
|
|
|
|
status = np_read_recv(subreq, &nread, &is_data_outstanding);
|
|
TALLOC_FREE(subreq);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
NTSTATUS old = status;
|
|
status = nt_status_np_pipe(old);
|
|
reply_nterror(req, status);
|
|
goto done;
|
|
}
|
|
|
|
req->outbuf = state->outbuf;
|
|
state->outbuf = NULL;
|
|
|
|
srv_set_message((char *)req->outbuf, 12, nread, False);
|
|
|
|
#if 0
|
|
/*
|
|
* we should return STATUS_BUFFER_OVERFLOW if there's
|
|
* out standing data.
|
|
*
|
|
* But we can't enable it yet, as it has bad interactions
|
|
* with fixup_chain_error_packet() in chain_reply().
|
|
*/
|
|
if (is_data_outstanding) {
|
|
error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
|
|
STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
|
|
}
|
|
#endif
|
|
|
|
SSVAL(req->outbuf,smb_vwv5,nread);
|
|
SSVAL(req->outbuf,smb_vwv6,
|
|
(smb_wct - 4) /* offset from smb header to wct */
|
|
+ 1 /* the wct field */
|
|
+ 12 * sizeof(uint16_t) /* vwv */
|
|
+ 2); /* the buflen field */
|
|
SSVAL(req->outbuf,smb_vwv11,state->smb_maxcnt);
|
|
|
|
DEBUG(3,("readX-IPC min=%d max=%d nread=%d\n",
|
|
state->smb_mincnt, state->smb_maxcnt, (int)nread));
|
|
|
|
done:
|
|
/*
|
|
* We must free here as the ownership of req was
|
|
* moved to the connection struct in reply_pipe_read_and_X().
|
|
*/
|
|
smb_request_done(req);
|
|
}
|