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samba-mirror/source3/libsmb/clitrans.c
Stefan Metzmacher 1d531090bc s3:libsmb: make use of map_nt_error_from_unix_common() in clitrans.c
metze

Autobuild-User: Stefan Metzmacher <metze@samba.org>
Autobuild-Date: Wed Oct 26 17:53:15 CEST 2011 on sn-devel-104
2011-10-26 17:53:15 +02:00

769 lines
20 KiB
C

/*
Unix SMB/CIFS implementation.
client transaction calls
Copyright (C) Andrew Tridgell 1994-1998
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"
struct trans_recvblob {
uint8_t *data;
uint32_t max, total, received;
};
struct cli_trans_state {
struct cli_state *cli;
struct tevent_context *ev;
uint8_t cmd;
uint16_t mid;
const char *pipe_name;
uint8_t *pipe_name_conv;
size_t pipe_name_conv_len;
uint16_t fid;
uint16_t function;
int flags;
uint16_t *setup;
uint8_t num_setup, max_setup;
uint8_t *param;
uint32_t num_param, param_sent;
uint8_t *data;
uint32_t num_data, data_sent;
uint8_t num_rsetup;
uint16_t *rsetup;
struct trans_recvblob rparam;
struct trans_recvblob rdata;
uint16_t recv_flags2;
struct iovec iov[6];
uint8_t pad[4];
uint8_t zero_pad[4];
uint16_t vwv[32];
struct tevent_req *primary_subreq;
};
static void cli_trans_cleanup_primary(struct cli_trans_state *state)
{
if (state->primary_subreq) {
cli_smb_req_set_mid(state->primary_subreq, 0);
cli_smb_req_unset_pending(state->primary_subreq);
TALLOC_FREE(state->primary_subreq);
}
}
static int cli_trans_state_destructor(struct cli_trans_state *state)
{
cli_trans_cleanup_primary(state);
return 0;
}
static NTSTATUS cli_pull_trans(uint8_t *inbuf,
uint8_t wct, uint16_t *vwv,
uint16_t num_bytes, uint8_t *bytes,
uint8_t smb_cmd, bool expect_first_reply,
uint8_t *pnum_setup, uint16_t **psetup,
uint32_t *ptotal_param, uint32_t *pnum_param,
uint32_t *pparam_disp, uint8_t **pparam,
uint32_t *ptotal_data, uint32_t *pnum_data,
uint32_t *pdata_disp, uint8_t **pdata)
{
uint32_t param_ofs, data_ofs;
if (expect_first_reply) {
if ((wct != 0) || (num_bytes != 0)) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
return NT_STATUS_OK;
}
switch (smb_cmd) {
case SMBtrans:
case SMBtrans2:
if (wct < 10) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
*ptotal_param = SVAL(vwv + 0, 0);
*ptotal_data = SVAL(vwv + 1, 0);
*pnum_param = SVAL(vwv + 3, 0);
param_ofs = SVAL(vwv + 4, 0);
*pparam_disp = SVAL(vwv + 5, 0);
*pnum_data = SVAL(vwv + 6, 0);
data_ofs = SVAL(vwv + 7, 0);
*pdata_disp = SVAL(vwv + 8, 0);
*pnum_setup = CVAL(vwv + 9, 0);
if (wct < 10 + (*pnum_setup)) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
*psetup = vwv + 10;
break;
case SMBnttrans:
if (wct < 18) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
*ptotal_param = IVAL(vwv, 3);
*ptotal_data = IVAL(vwv, 7);
*pnum_param = IVAL(vwv, 11);
param_ofs = IVAL(vwv, 15);
*pparam_disp = IVAL(vwv, 19);
*pnum_data = IVAL(vwv, 23);
data_ofs = IVAL(vwv, 27);
*pdata_disp = IVAL(vwv, 31);
*pnum_setup = CVAL(vwv, 35);
*psetup = vwv + 18;
break;
default:
return NT_STATUS_INTERNAL_ERROR;
}
/*
* Check for buffer overflows. data_ofs needs to be checked against
* the incoming buffer length, data_disp against the total
* length. Likewise for param_ofs/param_disp.
*/
if (smb_buffer_oob(smb_len_nbt(inbuf), param_ofs, *pnum_param)
|| smb_buffer_oob(*ptotal_param, *pparam_disp, *pnum_param)
|| smb_buffer_oob(smb_len_nbt(inbuf), data_ofs, *pnum_data)
|| smb_buffer_oob(*ptotal_data, *pdata_disp, *pnum_data)) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
*pparam = (uint8_t *)inbuf + 4 + param_ofs;
*pdata = (uint8_t *)inbuf + 4 + data_ofs;
return NT_STATUS_OK;
}
static NTSTATUS cli_trans_pull_blob(TALLOC_CTX *mem_ctx,
struct trans_recvblob *blob,
uint32_t total, uint32_t thistime,
uint8_t *buf, uint32_t displacement)
{
if (blob->data == NULL) {
if (total > blob->max) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
blob->total = total;
blob->data = talloc_array(mem_ctx, uint8_t, total);
if (blob->data == NULL) {
return NT_STATUS_NO_MEMORY;
}
}
if (total > blob->total) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
if (thistime) {
memcpy(blob->data + displacement, buf, thistime);
blob->received += thistime;
}
return NT_STATUS_OK;
}
static void cli_trans_format(struct cli_trans_state *state, uint8_t *pwct,
int *piov_count)
{
struct cli_state *cli = state->cli;
uint8_t wct = 0;
struct iovec *iov = state->iov;
uint8_t *pad = state->pad;
uint16_t *vwv = state->vwv;
uint32_t param_offset;
uint32_t this_param = 0;
uint32_t param_pad;
uint32_t data_offset;
uint32_t this_data = 0;
uint32_t data_pad;
uint32_t useable_space;
uint8_t cmd;
cmd = state->cmd;
if ((state->param_sent != 0) || (state->data_sent != 0)) {
/* The secondary commands are one after the primary ones */
cmd += 1;
}
param_offset = MIN_SMB_SIZE;
switch (cmd) {
case SMBtrans:
pad[0] = 0;
iov[0].iov_base = (void *)pad;
iov[0].iov_len = 1;
iov[1].iov_base = (void *)state->pipe_name_conv;
iov[1].iov_len = state->pipe_name_conv_len;
wct = 14 + state->num_setup;
param_offset += iov[0].iov_len + iov[1].iov_len;
iov += 2;
break;
case SMBtrans2:
pad[0] = 0;
pad[1] = 'D'; /* Copy this from "old" 3.0 behaviour */
pad[2] = ' ';
iov[0].iov_base = (void *)pad;
iov[0].iov_len = 3;
wct = 14 + state->num_setup;
param_offset += 3;
iov += 1;
break;
case SMBtranss:
wct = 8;
break;
case SMBtranss2:
wct = 9;
break;
case SMBnttrans:
wct = 19 + state->num_setup;
break;
case SMBnttranss:
wct = 18;
break;
}
param_offset += wct * sizeof(uint16_t);
useable_space = cli_state_available_size(cli, param_offset);
param_pad = param_offset % 4;
if (param_pad > 0) {
param_pad = MIN(param_pad, useable_space);
iov[0].iov_base = (void *)state->zero_pad;
iov[0].iov_len = param_pad;
iov += 1;
param_offset += param_pad;
}
useable_space = cli_state_available_size(cli, param_offset);
if (state->param_sent < state->num_param) {
this_param = MIN(state->num_param - state->param_sent,
useable_space);
iov[0].iov_base = (void *)(state->param + state->param_sent);
iov[0].iov_len = this_param;
iov += 1;
}
data_offset = param_offset + this_param;
useable_space = cli_state_available_size(cli, data_offset);
data_pad = data_offset % 4;
if (data_pad > 0) {
data_pad = MIN(data_pad, useable_space);
iov[0].iov_base = (void *)state->zero_pad;
iov[0].iov_len = data_pad;
iov += 1;
data_offset += data_pad;
}
useable_space = cli_state_available_size(cli, data_offset);
if (state->data_sent < state->num_data) {
this_data = MIN(state->num_data - state->data_sent,
useable_space);
iov[0].iov_base = (void *)(state->data + state->data_sent);
iov[0].iov_len = this_data;
iov += 1;
}
DEBUG(10, ("num_setup=%u, max_setup=%u, "
"param_total=%u, this_param=%u, max_param=%u, "
"data_total=%u, this_data=%u, max_data=%u, "
"param_offset=%u, param_pad=%u, param_disp=%u, "
"data_offset=%u, data_pad=%u, data_disp=%u\n",
(unsigned)state->num_setup, (unsigned)state->max_setup,
(unsigned)state->num_param, (unsigned)this_param,
(unsigned)state->rparam.max,
(unsigned)state->num_data, (unsigned)this_data,
(unsigned)state->rdata.max,
(unsigned)param_offset, (unsigned)param_pad,
(unsigned)state->param_sent,
(unsigned)data_offset, (unsigned)data_pad,
(unsigned)state->data_sent));
switch (cmd) {
case SMBtrans:
case SMBtrans2:
SSVAL(vwv + 0, 0, state->num_param);
SSVAL(vwv + 1, 0, state->num_data);
SSVAL(vwv + 2, 0, state->rparam.max);
SSVAL(vwv + 3, 0, state->rdata.max);
SCVAL(vwv + 4, 0, state->max_setup);
SCVAL(vwv + 4, 1, 0); /* reserved */
SSVAL(vwv + 5, 0, state->flags);
SIVAL(vwv + 6, 0, 0); /* timeout */
SSVAL(vwv + 8, 0, 0); /* reserved */
SSVAL(vwv + 9, 0, this_param);
SSVAL(vwv +10, 0, param_offset);
SSVAL(vwv +11, 0, this_data);
SSVAL(vwv +12, 0, data_offset);
SCVAL(vwv +13, 0, state->num_setup);
SCVAL(vwv +13, 1, 0); /* reserved */
memcpy(vwv + 14, state->setup,
sizeof(uint16_t) * state->num_setup);
break;
case SMBtranss:
case SMBtranss2:
SSVAL(vwv + 0, 0, state->num_param);
SSVAL(vwv + 1, 0, state->num_data);
SSVAL(vwv + 2, 0, this_param);
SSVAL(vwv + 3, 0, param_offset);
SSVAL(vwv + 4, 0, state->param_sent);
SSVAL(vwv + 5, 0, this_data);
SSVAL(vwv + 6, 0, data_offset);
SSVAL(vwv + 7, 0, state->data_sent);
if (cmd == SMBtranss2) {
SSVAL(vwv + 8, 0, state->fid);
}
break;
case SMBnttrans:
SCVAL(vwv + 0, 0, state->max_setup);
SSVAL(vwv + 0, 1, 0); /* reserved */
SIVAL(vwv + 1, 1, state->num_param);
SIVAL(vwv + 3, 1, state->num_data);
SIVAL(vwv + 5, 1, state->rparam.max);
SIVAL(vwv + 7, 1, state->rdata.max);
SIVAL(vwv + 9, 1, this_param);
SIVAL(vwv +11, 1, param_offset);
SIVAL(vwv +13, 1, this_data);
SIVAL(vwv +15, 1, data_offset);
SCVAL(vwv +17, 1, state->num_setup);
SSVAL(vwv +18, 0, state->function);
memcpy(vwv + 19, state->setup,
sizeof(uint16_t) * state->num_setup);
break;
case SMBnttranss:
SSVAL(vwv + 0, 0, 0); /* reserved */
SCVAL(vwv + 1, 0, 0); /* reserved */
SIVAL(vwv + 1, 1, state->num_param);
SIVAL(vwv + 3, 1, state->num_data);
SIVAL(vwv + 5, 1, this_param);
SIVAL(vwv + 7, 1, param_offset);
SIVAL(vwv + 9, 1, state->param_sent);
SIVAL(vwv +11, 1, this_data);
SIVAL(vwv +13, 1, data_offset);
SIVAL(vwv +15, 1, state->data_sent);
SCVAL(vwv +17, 1, 0); /* reserved */
break;
}
state->param_sent += this_param;
state->data_sent += this_data;
*pwct = wct;
*piov_count = iov - state->iov;
}
static void cli_trans_done(struct tevent_req *subreq);
struct tevent_req *cli_trans_send(
TALLOC_CTX *mem_ctx, struct tevent_context *ev,
struct cli_state *cli, uint8_t cmd,
const char *pipe_name, uint16_t fid, uint16_t function, int flags,
uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
uint8_t *param, uint32_t num_param, uint32_t max_param,
uint8_t *data, uint32_t num_data, uint32_t max_data)
{
struct tevent_req *req, *subreq;
struct cli_trans_state *state;
int iov_count;
uint8_t wct;
NTSTATUS status;
req = tevent_req_create(mem_ctx, &state, struct cli_trans_state);
if (req == NULL) {
return NULL;
}
if ((cmd == SMBtrans) || (cmd == SMBtrans2)) {
if ((num_param > 0xffff) || (max_param > 0xffff)
|| (num_data > 0xffff) || (max_data > 0xffff)) {
DEBUG(3, ("Attempt to send invalid trans2 request "
"(setup %u, params %u/%u, data %u/%u)\n",
(unsigned)num_setup,
(unsigned)num_param, (unsigned)max_param,
(unsigned)num_data, (unsigned)max_data));
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
}
/*
* The largest wct will be for nttrans (19+num_setup). Make sure we
* don't overflow state->vwv in cli_trans_format.
*/
if ((num_setup + 19) > ARRAY_SIZE(state->vwv)) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
state->cli = cli;
state->ev = ev;
state->cmd = cmd;
state->flags = flags;
state->num_rsetup = 0;
state->rsetup = NULL;
ZERO_STRUCT(state->rparam);
ZERO_STRUCT(state->rdata);
if ((pipe_name != NULL)
&& (!convert_string_talloc(state, CH_UNIX,
cli_ucs2(cli) ? CH_UTF16LE : CH_DOS,
pipe_name, strlen(pipe_name) + 1,
&state->pipe_name_conv,
&state->pipe_name_conv_len))) {
tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
return tevent_req_post(req, ev);
}
state->fid = fid; /* trans2 */
state->function = function; /* nttrans */
state->setup = setup;
state->num_setup = num_setup;
state->max_setup = max_setup;
state->param = param;
state->num_param = num_param;
state->param_sent = 0;
state->rparam.max = max_param;
state->data = data;
state->num_data = num_data;
state->data_sent = 0;
state->rdata.max = max_data;
cli_trans_format(state, &wct, &iov_count);
subreq = cli_smb_req_create(state, ev, cli, cmd, 0, wct, state->vwv,
iov_count, state->iov);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
status = cli_smb_req_send(subreq);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, state->ev);
}
tevent_req_set_callback(subreq, cli_trans_done, req);
/*
* Now get the MID of the primary request
* and mark it as persistent. This means
* we will able to send and receive multiple
* SMB pdus using this MID in both directions
* (including correct SMB signing).
*/
state->mid = cli_smb_req_mid(subreq);
cli_smb_req_set_mid(subreq, state->mid);
state->primary_subreq = subreq;
talloc_set_destructor(state, cli_trans_state_destructor);
return req;
}
static void cli_trans_done2(struct tevent_req *subreq);
static void cli_trans_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct cli_trans_state *state = tevent_req_data(
req, struct cli_trans_state);
NTSTATUS status;
bool sent_all;
const uint8_t *inhdr;
uint8_t wct;
uint16_t *vwv;
uint32_t num_bytes;
uint8_t *bytes;
uint8_t *inbuf;
uint8_t num_setup = 0;
uint16_t *setup = NULL;
uint32_t total_param = 0;
uint32_t num_param = 0;
uint32_t param_disp = 0;
uint32_t total_data = 0;
uint32_t num_data = 0;
uint32_t data_disp = 0;
uint8_t *param = NULL;
uint8_t *data = NULL;
status = cli_smb_recv(subreq, state, &inbuf, 0, &wct, &vwv,
&num_bytes, &bytes);
/*
* Do not TALLOC_FREE(subreq) here, we might receive more than
* one response for the same mid.
*/
/*
* We can receive something like STATUS_MORE_ENTRIES, so don't use
* !NT_STATUS_IS_OK(status) here.
*/
if (NT_STATUS_IS_ERR(status)) {
goto fail;
}
inhdr = inbuf + NBT_HDR_SIZE;
sent_all = ((state->param_sent == state->num_param)
&& (state->data_sent == state->num_data));
status = cli_pull_trans(
inbuf, wct, vwv, num_bytes, bytes,
state->cmd, !sent_all, &num_setup, &setup,
&total_param, &num_param, &param_disp, &param,
&total_data, &num_data, &data_disp, &data);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
if (!sent_all) {
int iov_count;
struct tevent_req *subreq2;
cli_trans_format(state, &wct, &iov_count);
subreq2 = cli_smb_req_create(state, state->ev, state->cli,
state->cmd + 1, 0, wct, state->vwv,
iov_count, state->iov);
if (tevent_req_nomem(subreq2, req)) {
return;
}
cli_smb_req_set_mid(subreq2, state->mid);
status = cli_smb_req_send(subreq2);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
tevent_req_set_callback(subreq2, cli_trans_done2, req);
return;
}
status = cli_trans_pull_blob(
state, &state->rparam, total_param, num_param, param,
param_disp);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("Pulling params failed: %s\n", nt_errstr(status)));
goto fail;
}
status = cli_trans_pull_blob(
state, &state->rdata, total_data, num_data, data,
data_disp);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("Pulling data failed: %s\n", nt_errstr(status)));
goto fail;
}
if ((state->rparam.total == state->rparam.received)
&& (state->rdata.total == state->rdata.received)) {
state->recv_flags2 = SVAL(inhdr, HDR_FLG2);
cli_trans_cleanup_primary(state);
tevent_req_done(req);
return;
}
TALLOC_FREE(inbuf);
return;
fail:
cli_trans_cleanup_primary(state);
tevent_req_nterror(req, status);
}
static void cli_trans_done2(struct tevent_req *subreq2)
{
struct tevent_req *req = tevent_req_callback_data(
subreq2, struct tevent_req);
struct cli_trans_state *state = tevent_req_data(
req, struct cli_trans_state);
NTSTATUS status;
bool sent_all;
uint8_t wct;
uint32_t seqnum;
/*
* First backup the seqnum of the secondary request
* and attach it to the primary request.
*/
seqnum = cli_smb_req_seqnum(subreq2);
cli_smb_req_set_seqnum(state->primary_subreq, seqnum);
status = cli_smb_recv(subreq2, state, NULL, 0, &wct, NULL,
NULL, NULL);
TALLOC_FREE(subreq2);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
if (wct != 0) {
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
goto fail;
}
sent_all = ((state->param_sent == state->num_param)
&& (state->data_sent == state->num_data));
if (!sent_all) {
int iov_count;
cli_trans_format(state, &wct, &iov_count);
subreq2 = cli_smb_req_create(state, state->ev, state->cli,
state->cmd + 1, 0, wct, state->vwv,
iov_count, state->iov);
if (tevent_req_nomem(subreq2, req)) {
return;
}
cli_smb_req_set_mid(subreq2, state->mid);
status = cli_smb_req_send(subreq2);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
tevent_req_set_callback(subreq2, cli_trans_done2, req);
return;
}
return;
fail:
cli_trans_cleanup_primary(state);
tevent_req_nterror(req, status);
}
NTSTATUS cli_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
uint16_t *recv_flags2,
uint16_t **setup, uint8_t min_setup,
uint8_t *num_setup,
uint8_t **param, uint32_t min_param,
uint32_t *num_param,
uint8_t **data, uint32_t min_data,
uint32_t *num_data)
{
struct cli_trans_state *state = tevent_req_data(
req, struct cli_trans_state);
NTSTATUS status;
cli_trans_cleanup_primary(state);
if (tevent_req_is_nterror(req, &status)) {
return status;
}
if ((state->num_rsetup < min_setup)
|| (state->rparam.total < min_param)
|| (state->rdata.total < min_data)) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
if (recv_flags2 != NULL) {
*recv_flags2 = state->recv_flags2;
}
if (setup != NULL) {
*setup = talloc_move(mem_ctx, &state->rsetup);
*num_setup = state->num_rsetup;
} else {
TALLOC_FREE(state->rsetup);
}
if (param != NULL) {
*param = talloc_move(mem_ctx, &state->rparam.data);
*num_param = state->rparam.total;
} else {
TALLOC_FREE(state->rparam.data);
}
if (data != NULL) {
*data = talloc_move(mem_ctx, &state->rdata.data);
*num_data = state->rdata.total;
} else {
TALLOC_FREE(state->rdata.data);
}
return NT_STATUS_OK;
}
NTSTATUS cli_trans(TALLOC_CTX *mem_ctx, struct cli_state *cli,
uint8_t trans_cmd,
const char *pipe_name, uint16_t fid, uint16_t function,
int flags,
uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
uint8_t *param, uint32_t num_param, uint32_t max_param,
uint8_t *data, uint32_t num_data, uint32_t max_data,
uint16_t *recv_flags2,
uint16_t **rsetup, uint8_t min_rsetup, uint8_t *num_rsetup,
uint8_t **rparam, uint32_t min_rparam, uint32_t *num_rparam,
uint8_t **rdata, uint32_t min_rdata, uint32_t *num_rdata)
{
TALLOC_CTX *frame = talloc_stackframe();
struct tevent_context *ev;
struct tevent_req *req;
NTSTATUS status = NT_STATUS_OK;
if (cli_has_async_calls(cli)) {
/*
* Can't use sync call while an async call is in flight
*/
status = NT_STATUS_INVALID_PARAMETER;
goto fail;
}
ev = tevent_context_init(frame);
if (ev == NULL) {
status = NT_STATUS_NO_MEMORY;
goto fail;
}
req = cli_trans_send(frame, ev, cli, trans_cmd,
pipe_name, fid, function, flags,
setup, num_setup, max_setup,
param, num_param, max_param,
data, num_data, max_data);
if (req == NULL) {
status = NT_STATUS_NO_MEMORY;
goto fail;
}
if (!tevent_req_poll(req, ev)) {
status = map_nt_error_from_unix_common(errno);
goto fail;
}
status = cli_trans_recv(req, mem_ctx, recv_flags2,
rsetup, min_rsetup, num_rsetup,
rparam, min_rparam, num_rparam,
rdata, min_rdata, num_rdata);
fail:
TALLOC_FREE(frame);
return status;
}