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/*
Unix SMB/CIFS implementation.
Infrastructure for async SMB client requests
Copyright (C) Volker Lendecke 2008
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 "libsmb/libsmb.h"
#include "../lib/util/tevent_ntstatus.h"
#include "async_smb.h"
#include "../libcli/smb/smbXcli_base.h"
struct cli_smb_req_state {
struct cli_state *cli;
uint8_t smb_command;
struct tevent_req *req;
struct cli_smb_req_state **ptr;
};
static int cli_smb_req_state_destructor(struct cli_smb_req_state *state)
{
talloc_set_destructor(state->ptr, NULL);
talloc_free(state->ptr);
return 0;
}
static int cli_smb_req_state_ptr_destructor(struct cli_smb_req_state **ptr)
{
struct cli_smb_req_state *state = *ptr;
void *parent = talloc_parent(state);
talloc_set_destructor(state, NULL);
talloc_reparent(state, parent, state->req);
talloc_free(state);
return 0;
}
struct tevent_req *cli_smb_req_create(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct cli_state *cli,
uint8_t smb_command,
uint8_t additional_flags,
uint16_t additional_flags2,
uint8_t wct, uint16_t *vwv,
int iov_count,
struct iovec *bytes_iov)
{
struct cli_smb_req_state *state;
uint8_t clear_flags = 0;
uint16_t clear_flags2 = 0;
state = talloc_zero(mem_ctx, struct cli_smb_req_state);
if (state == NULL) {
return NULL;
}
state->cli = cli;
state->smb_command = smb_command;
state->ptr = talloc(state, struct cli_smb_req_state *);
if (state->ptr == NULL) {
talloc_free(state);
return NULL;
}
*state->ptr = state;
state->req = smb1cli_req_create(state, ev, cli->conn, smb_command,
additional_flags, clear_flags,
additional_flags2, clear_flags2,
cli->timeout,
cli->smb1.pid,
cli->smb1.tcon,
cli->smb1.session,
wct, vwv, iov_count, bytes_iov);
if (state->req == NULL) {
talloc_free(state);
return NULL;
}
talloc_reparent(state, state->req, state->ptr);
talloc_set_destructor(state, cli_smb_req_state_destructor);
talloc_set_destructor(state->ptr, cli_smb_req_state_ptr_destructor);
return state->req;
}
struct tevent_req *cli_smb_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct cli_state *cli,
uint8_t smb_command,
uint8_t additional_flags,
uint16_t additional_flags2,
uint8_t wct, uint16_t *vwv,
uint32_t num_bytes,
const uint8_t *bytes)
{
struct cli_smb_req_state *state;
uint8_t clear_flags = 0;
uint16_t clear_flags2 = 0;
state = talloc_zero(mem_ctx, struct cli_smb_req_state);
if (state == NULL) {
return NULL;
}
state->cli = cli;
state->smb_command = smb_command;
state->ptr = talloc(state, struct cli_smb_req_state *);
if (state->ptr == NULL) {
talloc_free(state);
return NULL;
}
*state->ptr = state;
state->req = smb1cli_req_send(state, ev, cli->conn, smb_command,
additional_flags, clear_flags,
additional_flags2, clear_flags2,
cli->timeout,
cli->smb1.pid,
cli->smb1.tcon,
cli->smb1.session,
wct, vwv, num_bytes, bytes);
if (state->req == NULL) {
talloc_free(state);
return NULL;
}
talloc_reparent(state, state->req, state->ptr);
talloc_set_destructor(state, cli_smb_req_state_destructor);
talloc_set_destructor(state->ptr, cli_smb_req_state_ptr_destructor);
return state->req;
}
NTSTATUS cli_smb_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx, uint8_t **pinbuf,
uint8_t min_wct, uint8_t *pwct, uint16_t **pvwv,
uint32_t *pnum_bytes, uint8_t **pbytes)
{
NTSTATUS status;
void *parent = talloc_parent(req);
struct cli_smb_req_state *state =
talloc_get_type(parent,
struct cli_smb_req_state);
struct iovec *recv_iov = NULL;
uint8_t wct = 0;
uint16_t *vwv = NULL;
uint32_t num_bytes;
uint8_t *bytes = NULL;
uint8_t *inbuf;
bool is_expected = false;
bool map_dos_errors = true;
if (pinbuf != NULL) {
*pinbuf = NULL;
}
if (pwct != NULL) {
*pwct = 0;
}
if (pvwv != NULL) {
*pvwv = NULL;
}
if (pnum_bytes != NULL) {
*pnum_bytes = 0;
}
if (pbytes != NULL) {
*pbytes = NULL;
}
status = smb1cli_req_recv(req, req,
&recv_iov,
NULL, /* phdr */
&wct,
&vwv,
NULL, /* pvwv_offset */
&num_bytes,
&bytes,
NULL, /* pbytes_offset */
&inbuf,
NULL, 0); /* expected */
if (state) {
if ((state->smb_command == SMBsesssetupX) &&
NT_STATUS_EQUAL(status,
NT_STATUS_MORE_PROCESSING_REQUIRED)) {
/*
* NT_STATUS_MORE_PROCESSING_REQUIRED is a
* valid return code for session setup
*/
is_expected = true;
}
map_dos_errors = state->cli->map_dos_errors;
state->cli->raw_status = status;
talloc_free(state->ptr);
state = NULL;
}
if (NT_STATUS_IS_DOS(status) && map_dos_errors) {
uint8_t eclass = NT_STATUS_DOS_CLASS(status);
uint16_t ecode = NT_STATUS_DOS_CODE(status);
/*
* TODO: is it really a good idea to do a mapping here?
*
* The old cli_pull_error() also does it, so I do not change
* the behavior yet.
*/
status = dos_to_ntstatus(eclass, ecode);
}
if (!NT_STATUS_IS_ERR(status)) {
is_expected = true;
}
if (!is_expected) {
TALLOC_FREE(recv_iov);
return status;
}
if (wct < min_wct) {
TALLOC_FREE(recv_iov);
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
if (pwct != NULL) {
*pwct = wct;
}
if (pvwv != NULL) {
*pvwv = vwv;
}
if (pnum_bytes != NULL) {
*pnum_bytes = num_bytes;
}
if (pbytes != NULL) {
*pbytes = bytes;
}
if (pinbuf != NULL && mem_ctx != NULL) {
if (talloc_reference_count(inbuf) == 0) {
*pinbuf = talloc_move(mem_ctx, &inbuf);
TALLOC_FREE(recv_iov);
} else {
*pinbuf = inbuf;
}
} else if (mem_ctx != NULL) {
if (talloc_reference_count(inbuf) == 0) {
(void)talloc_move(mem_ctx, &inbuf);
TALLOC_FREE(recv_iov);
}
}
return status;
}
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