/*
Unix SMB/CIFS implementation.
client file read/write routines
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 .
*/
#include "includes.h"
#include "libsmb/libsmb.h"
#include "../lib/util/tevent_ntstatus.h"
#include "async_smb.h"
#include "trans2.h"
/****************************************************************************
Calculate the recommended read buffer size
****************************************************************************/
static size_t cli_read_max_bufsize(struct cli_state *cli)
{
size_t data_offset = smb_size - 4;
size_t wct = 12;
size_t useable_space;
if (!client_is_signing_on(cli) && !cli_encryption_on(cli)
&& (cli->server_posix_capabilities & CIFS_UNIX_LARGE_READ_CAP)) {
return CLI_SAMBA_MAX_POSIX_LARGE_READX_SIZE;
}
if (cli_state_capabilities(cli) & CAP_LARGE_READX) {
return cli->is_samba
? CLI_SAMBA_MAX_LARGE_READX_SIZE
: CLI_WINDOWS_MAX_LARGE_READX_SIZE;
}
data_offset += wct * sizeof(uint16_t);
data_offset += 1; /* pad */
useable_space = cli_state_available_size(cli, data_offset);
return useable_space;
}
/****************************************************************************
Calculate the recommended write buffer size
****************************************************************************/
static size_t cli_write_max_bufsize(struct cli_state *cli,
uint16_t write_mode,
uint8_t wct)
{
if (write_mode == 0 &&
!client_is_signing_on(cli) &&
!cli_encryption_on(cli) &&
(cli->server_posix_capabilities & CIFS_UNIX_LARGE_WRITE_CAP) &&
(cli_state_capabilities(cli) & CAP_LARGE_FILES)) {
/* Only do massive writes if we can do them direct
* with no signing or encrypting - not on a pipe. */
return CLI_SAMBA_MAX_POSIX_LARGE_WRITEX_SIZE;
}
if (cli->is_samba) {
return CLI_SAMBA_MAX_LARGE_WRITEX_SIZE;
}
if (((cli_state_capabilities(cli) & CAP_LARGE_WRITEX) == 0)
|| client_is_signing_on(cli)
|| strequal(cli->dev, "LPT1:")) {
size_t data_offset = smb_size - 4;
size_t useable_space;
data_offset += wct * sizeof(uint16_t);
data_offset += 1; /* pad */
useable_space = cli->max_xmit - data_offset;
return useable_space;
}
return CLI_WINDOWS_MAX_LARGE_WRITEX_SIZE;
}
struct cli_read_andx_state {
size_t size;
uint16_t vwv[12];
NTSTATUS status;
size_t received;
uint8_t *buf;
};
static void cli_read_andx_done(struct tevent_req *subreq);
struct tevent_req *cli_read_andx_create(TALLOC_CTX *mem_ctx,
struct event_context *ev,
struct cli_state *cli, uint16_t fnum,
off_t offset, size_t size,
struct tevent_req **psmbreq)
{
struct tevent_req *req, *subreq;
struct cli_read_andx_state *state;
uint8_t wct = 10;
if (size > cli_read_max_bufsize(cli)) {
DEBUG(0, ("cli_read_andx_send got size=%d, can only handle "
"size=%d\n", (int)size,
(int)cli_read_max_bufsize(cli)));
return NULL;
}
req = tevent_req_create(mem_ctx, &state, struct cli_read_andx_state);
if (req == NULL) {
return NULL;
}
state->size = size;
SCVAL(state->vwv + 0, 0, 0xFF);
SCVAL(state->vwv + 0, 1, 0);
SSVAL(state->vwv + 1, 0, 0);
SSVAL(state->vwv + 2, 0, fnum);
SIVAL(state->vwv + 3, 0, offset);
SSVAL(state->vwv + 5, 0, size);
SSVAL(state->vwv + 6, 0, size);
SSVAL(state->vwv + 7, 0, (size >> 16));
SSVAL(state->vwv + 8, 0, 0);
SSVAL(state->vwv + 9, 0, 0);
if ((uint64_t)offset >> 32) {
SIVAL(state->vwv + 10, 0,
(((uint64_t)offset)>>32) & 0xffffffff);
wct += 2;
}
subreq = cli_smb_req_create(state, ev, cli, SMBreadX, 0, wct,
state->vwv, 0, NULL);
if (subreq == NULL) {
TALLOC_FREE(req);
return NULL;
}
tevent_req_set_callback(subreq, cli_read_andx_done, req);
*psmbreq = subreq;
return req;
}
struct tevent_req *cli_read_andx_send(TALLOC_CTX *mem_ctx,
struct event_context *ev,
struct cli_state *cli, uint16_t fnum,
off_t offset, size_t size)
{
struct tevent_req *req, *subreq;
NTSTATUS status;
req = cli_read_andx_create(mem_ctx, ev, cli, fnum, offset, size,
&subreq);
if (req == NULL) {
return NULL;
}
status = cli_smb_req_send(subreq);
if (tevent_req_nterror(req, status)) {
return tevent_req_post(req, ev);
}
return req;
}
static void cli_read_andx_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct cli_read_andx_state *state = tevent_req_data(
req, struct cli_read_andx_state);
uint8_t *inbuf;
uint8_t wct;
uint16_t *vwv;
uint32_t num_bytes;
uint8_t *bytes;
state->status = cli_smb_recv(subreq, state, &inbuf, 12, &wct, &vwv,
&num_bytes, &bytes);
TALLOC_FREE(subreq);
if (NT_STATUS_IS_ERR(state->status)) {
tevent_req_nterror(req, state->status);
return;
}
/* size is the number of bytes the server returned.
* Might be zero. */
state->received = SVAL(vwv + 5, 0);
state->received |= (((unsigned int)SVAL(vwv + 7, 0)) << 16);
if (state->received > state->size) {
DEBUG(5,("server returned more than we wanted!\n"));
tevent_req_nterror(req, NT_STATUS_UNEXPECTED_IO_ERROR);
return;
}
/*
* bcc field must be valid for small reads, for large reads the 16-bit
* bcc field can't be correct.
*/
if ((state->received < 0xffff) && (state->received > num_bytes)) {
DEBUG(5, ("server announced more bytes than sent\n"));
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
return;
}
state->buf = discard_const_p(uint8_t, smb_base(inbuf)) + SVAL(vwv+6, 0);
if (trans_oob(smb_len(inbuf), SVAL(vwv+6, 0), state->received)
|| ((state->received != 0) && (state->buf < bytes))) {
DEBUG(5, ("server returned invalid read&x data offset\n"));
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
return;
}
tevent_req_done(req);
}
/*
* Pull the data out of a finished async read_and_x request. rcvbuf is
* talloced from the request, so better make sure that you copy it away before
* you talloc_free(req). "rcvbuf" is NOT a talloc_ctx of its own, so do not
* talloc_move it!
*/
NTSTATUS cli_read_andx_recv(struct tevent_req *req, ssize_t *received,
uint8_t **rcvbuf)
{
struct cli_read_andx_state *state = tevent_req_data(
req, struct cli_read_andx_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
return status;
}
*received = state->received;
*rcvbuf = state->buf;
return NT_STATUS_OK;
}
struct cli_readall_state {
struct tevent_context *ev;
struct cli_state *cli;
uint16_t fnum;
off_t start_offset;
size_t size;
size_t received;
uint8_t *buf;
};
static void cli_readall_done(struct tevent_req *subreq);
static struct tevent_req *cli_readall_send(TALLOC_CTX *mem_ctx,
struct event_context *ev,
struct cli_state *cli,
uint16_t fnum,
off_t offset, size_t size)
{
struct tevent_req *req, *subreq;
struct cli_readall_state *state;
req = tevent_req_create(mem_ctx, &state, struct cli_readall_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
state->cli = cli;
state->fnum = fnum;
state->start_offset = offset;
state->size = size;
state->received = 0;
state->buf = NULL;
subreq = cli_read_andx_send(state, ev, cli, fnum, offset, size);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, cli_readall_done, req);
return req;
}
static void cli_readall_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct cli_readall_state *state = tevent_req_data(
req, struct cli_readall_state);
ssize_t received;
uint8_t *buf;
NTSTATUS status;
status = cli_read_andx_recv(subreq, &received, &buf);
if (tevent_req_nterror(req, status)) {
return;
}
if (received == 0) {
/* EOF */
tevent_req_done(req);
return;
}
if ((state->received == 0) && (received == state->size)) {
/* Ideal case: Got it all in one run */
state->buf = buf;
state->received += received;
tevent_req_done(req);
return;
}
/*
* We got a short read, issue a read for the
* rest. Unfortunately we have to allocate the buffer
* ourselves now, as our caller expects to receive a single
* buffer. cli_read_andx does it from the buffer received from
* the net, but with a short read we have to put it together
* from several reads.
*/
if (state->buf == NULL) {
state->buf = talloc_array(state, uint8_t, state->size);
if (tevent_req_nomem(state->buf, req)) {
return;
}
}
memcpy(state->buf + state->received, buf, received);
state->received += received;
TALLOC_FREE(subreq);
if (state->received >= state->size) {
tevent_req_done(req);
return;
}
subreq = cli_read_andx_send(state, state->ev, state->cli, state->fnum,
state->start_offset + state->received,
state->size - state->received);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, cli_readall_done, req);
}
static NTSTATUS cli_readall_recv(struct tevent_req *req, ssize_t *received,
uint8_t **rcvbuf)
{
struct cli_readall_state *state = tevent_req_data(
req, struct cli_readall_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
return status;
}
*received = state->received;
*rcvbuf = state->buf;
return NT_STATUS_OK;
}
struct cli_pull_subreq {
struct tevent_req *req;
ssize_t received;
uint8_t *buf;
};
/*
* Parallel read support.
*
* cli_pull sends as many read&x requests as the server would allow via
* max_mux at a time. When replies flow back in, the data is written into
* the callback function "sink" in the right order.
*/
struct cli_pull_state {
struct tevent_req *req;
struct event_context *ev;
struct cli_state *cli;
uint16_t fnum;
off_t start_offset;
SMB_OFF_T size;
NTSTATUS (*sink)(char *buf, size_t n, void *priv);
void *priv;
size_t chunk_size;
/*
* Outstanding requests
*/
int num_reqs;
struct cli_pull_subreq *reqs;
/*
* For how many bytes did we send requests already?
*/
SMB_OFF_T requested;
/*
* Next request index to push into "sink". This walks around the "req"
* array, taking care that the requests are pushed to "sink" in the
* right order. If necessary (i.e. replies don't come in in the right
* order), replies are held back in "reqs".
*/
int top_req;
/*
* How many bytes did we push into "sink"?
*/
SMB_OFF_T pushed;
};
static char *cli_pull_print(struct tevent_req *req, TALLOC_CTX *mem_ctx)
{
struct cli_pull_state *state = tevent_req_data(
req, struct cli_pull_state);
char *result;
result = tevent_req_default_print(req, mem_ctx);
if (result == NULL) {
return NULL;
}
return talloc_asprintf_append_buffer(
result, "num_reqs=%d, top_req=%d",
state->num_reqs, state->top_req);
}
static void cli_pull_read_done(struct tevent_req *read_req);
/*
* Prepare an async pull request
*/
struct tevent_req *cli_pull_send(TALLOC_CTX *mem_ctx,
struct event_context *ev,
struct cli_state *cli,
uint16_t fnum, off_t start_offset,
SMB_OFF_T size, size_t window_size,
NTSTATUS (*sink)(char *buf, size_t n,
void *priv),
void *priv)
{
struct tevent_req *req;
struct cli_pull_state *state;
int i;
req = tevent_req_create(mem_ctx, &state, struct cli_pull_state);
if (req == NULL) {
return NULL;
}
tevent_req_set_print_fn(req, cli_pull_print);
state->req = req;
state->cli = cli;
state->ev = ev;
state->fnum = fnum;
state->start_offset = start_offset;
state->size = size;
state->sink = sink;
state->priv = priv;
state->pushed = 0;
state->top_req = 0;
if (size == 0) {
tevent_req_done(req);
return tevent_req_post(req, ev);
}
state->chunk_size = cli_read_max_bufsize(cli);
state->num_reqs = MAX(window_size/state->chunk_size, 1);
state->num_reqs = MIN(state->num_reqs, cli->max_mux);
state->reqs = talloc_zero_array(state, struct cli_pull_subreq,
state->num_reqs);
if (state->reqs == NULL) {
goto failed;
}
state->requested = 0;
for (i=0; inum_reqs; i++) {
struct cli_pull_subreq *subreq = &state->reqs[i];
SMB_OFF_T size_left;
size_t request_thistime;
if (state->requested >= size) {
state->num_reqs = i;
break;
}
size_left = size - state->requested;
request_thistime = MIN(size_left, state->chunk_size);
subreq->req = cli_readall_send(
state->reqs, ev, cli, fnum,
state->start_offset + state->requested,
request_thistime);
if (subreq->req == NULL) {
goto failed;
}
tevent_req_set_callback(subreq->req, cli_pull_read_done, req);
state->requested += request_thistime;
}
return req;
failed:
TALLOC_FREE(req);
return NULL;
}
/*
* Handle incoming read replies, push the data into sink and send out new
* requests if necessary.
*/
static void cli_pull_read_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct cli_pull_state *state = tevent_req_data(
req, struct cli_pull_state);
struct cli_pull_subreq *pull_subreq = NULL;
NTSTATUS status;
int i;
for (i = 0; i < state->num_reqs; i++) {
pull_subreq = &state->reqs[i];
if (subreq == pull_subreq->req) {
break;
}
}
if (i == state->num_reqs) {
/* Huh -- received something we did not send?? */
tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
return;
}
status = cli_readall_recv(subreq, &pull_subreq->received,
&pull_subreq->buf);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(state->req, status);
return;
}
/*
* This loop is the one to take care of out-of-order replies. All
* pending requests are in state->reqs, state->reqs[top_req] is the
* one that is to be pushed next. If however a request later than
* top_req is replied to, then we can't push yet. If top_req is
* replied to at a later point then, we need to push all the finished
* requests.
*/
while (state->reqs[state->top_req].req != NULL) {
struct cli_pull_subreq *top_subreq;
DEBUG(11, ("cli_pull_read_done: top_req = %d\n",
state->top_req));
top_subreq = &state->reqs[state->top_req];
if (tevent_req_is_in_progress(top_subreq->req)) {
DEBUG(11, ("cli_pull_read_done: top request not yet "
"done\n"));
return;
}
DEBUG(10, ("cli_pull_read_done: Pushing %d bytes, %d already "
"pushed\n", (int)top_subreq->received,
(int)state->pushed));
status = state->sink((char *)top_subreq->buf,
top_subreq->received, state->priv);
if (tevent_req_nterror(state->req, status)) {
return;
}
state->pushed += top_subreq->received;
TALLOC_FREE(state->reqs[state->top_req].req);
if (state->requested < state->size) {
struct tevent_req *new_req;
SMB_OFF_T size_left;
size_t request_thistime;
size_left = state->size - state->requested;
request_thistime = MIN(size_left, state->chunk_size);
DEBUG(10, ("cli_pull_read_done: Requesting %d bytes "
"at %d, position %d\n",
(int)request_thistime,
(int)(state->start_offset
+ state->requested),
state->top_req));
new_req = cli_readall_send(
state->reqs, state->ev, state->cli,
state->fnum,
state->start_offset + state->requested,
request_thistime);
if (tevent_req_nomem(new_req, state->req)) {
return;
}
tevent_req_set_callback(new_req, cli_pull_read_done,
req);
state->reqs[state->top_req].req = new_req;
state->requested += request_thistime;
}
state->top_req = (state->top_req+1) % state->num_reqs;
}
tevent_req_done(req);
}
NTSTATUS cli_pull_recv(struct tevent_req *req, SMB_OFF_T *received)
{
struct cli_pull_state *state = tevent_req_data(
req, struct cli_pull_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
return status;
}
*received = state->pushed;
return NT_STATUS_OK;
}
NTSTATUS cli_pull(struct cli_state *cli, uint16_t fnum,
off_t start_offset, SMB_OFF_T size, size_t window_size,
NTSTATUS (*sink)(char *buf, size_t n, void *priv),
void *priv, SMB_OFF_T *received)
{
TALLOC_CTX *frame = talloc_stackframe();
struct event_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 = event_context_init(frame);
if (ev == NULL) {
status = NT_STATUS_NO_MEMORY;
goto fail;
}
req = cli_pull_send(frame, ev, cli, fnum, start_offset, size,
window_size, sink, priv);
if (req == NULL) {
status = NT_STATUS_NO_MEMORY;
goto fail;
}
if (!tevent_req_poll(req, ev)) {
status = map_nt_error_from_unix(errno);
goto fail;
}
status = cli_pull_recv(req, received);
fail:
TALLOC_FREE(frame);
return status;
}
static NTSTATUS cli_read_sink(char *buf, size_t n, void *priv)
{
char **pbuf = (char **)priv;
memcpy(*pbuf, buf, n);
*pbuf += n;
return NT_STATUS_OK;
}
NTSTATUS cli_read(struct cli_state *cli, uint16_t fnum,
char *buf, off_t offset, size_t size,
size_t *nread)
{
NTSTATUS status;
SMB_OFF_T ret;
status = cli_pull(cli, fnum, offset, size, size,
cli_read_sink, &buf, &ret);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
if (nread) {
*nread = ret;
}
return NT_STATUS_OK;
}
/****************************************************************************
write to a file using a SMBwrite and not bypassing 0 byte writes
****************************************************************************/
NTSTATUS cli_smbwrite(struct cli_state *cli, uint16_t fnum, char *buf,
off_t offset, size_t size1, size_t *ptotal)
{
uint8_t *bytes;
ssize_t total = 0;
/*
* 3 bytes prefix
*/
bytes = talloc_array(talloc_tos(), uint8_t, 3);
if (bytes == NULL) {
return NT_STATUS_NO_MEMORY;
}
bytes[0] = 1;
do {
size_t size = MIN(size1, cli->max_xmit - 48);
struct tevent_req *req;
uint16_t vwv[5];
uint16_t *ret_vwv;
NTSTATUS status;
SSVAL(vwv+0, 0, fnum);
SSVAL(vwv+1, 0, size);
SIVAL(vwv+2, 0, offset);
SSVAL(vwv+4, 0, 0);
bytes = talloc_realloc(talloc_tos(), bytes, uint8_t,
size+3);
if (bytes == NULL) {
return NT_STATUS_NO_MEMORY;
}
SSVAL(bytes, 1, size);
memcpy(bytes + 3, buf + total, size);
status = cli_smb(talloc_tos(), cli, SMBwrite, 0, 5, vwv,
size+3, bytes, &req, 1, NULL, &ret_vwv,
NULL, NULL);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(bytes);
return status;
}
size = SVAL(ret_vwv+0, 0);
TALLOC_FREE(req);
if (size == 0) {
break;
}
size1 -= size;
total += size;
offset += size;
} while (size1);
TALLOC_FREE(bytes);
if (ptotal != NULL) {
*ptotal = total;
}
return NT_STATUS_OK;
}
/*
* Send a write&x request
*/
struct cli_write_andx_state {
size_t size;
uint16_t vwv[14];
size_t written;
uint8_t pad;
struct iovec iov[2];
};
static void cli_write_andx_done(struct tevent_req *subreq);
struct tevent_req *cli_write_andx_create(TALLOC_CTX *mem_ctx,
struct event_context *ev,
struct cli_state *cli, uint16_t fnum,
uint16_t mode, const uint8_t *buf,
off_t offset, size_t size,
struct tevent_req **reqs_before,
int num_reqs_before,
struct tevent_req **psmbreq)
{
struct tevent_req *req, *subreq;
struct cli_write_andx_state *state;
bool bigoffset = ((cli_state_capabilities(cli) & CAP_LARGE_FILES) != 0);
uint8_t wct = bigoffset ? 14 : 12;
size_t max_write = cli_write_max_bufsize(cli, mode, wct);
uint16_t *vwv;
req = tevent_req_create(mem_ctx, &state, struct cli_write_andx_state);
if (req == NULL) {
return NULL;
}
size = MIN(size, max_write);
vwv = state->vwv;
SCVAL(vwv+0, 0, 0xFF);
SCVAL(vwv+0, 1, 0);
SSVAL(vwv+1, 0, 0);
SSVAL(vwv+2, 0, fnum);
SIVAL(vwv+3, 0, offset);
SIVAL(vwv+5, 0, 0);
SSVAL(vwv+7, 0, mode);
SSVAL(vwv+8, 0, 0);
SSVAL(vwv+9, 0, (size>>16));
SSVAL(vwv+10, 0, size);
SSVAL(vwv+11, 0,
cli_smb_wct_ofs(reqs_before, num_reqs_before)
+ 1 /* the wct field */
+ wct * 2 /* vwv */
+ 2 /* num_bytes field */
+ 1 /* pad */);
if (bigoffset) {
SIVAL(vwv+12, 0, (((uint64_t)offset)>>32) & 0xffffffff);
}
state->pad = 0;
state->iov[0].iov_base = (void *)&state->pad;
state->iov[0].iov_len = 1;
state->iov[1].iov_base = discard_const_p(void, buf);
state->iov[1].iov_len = size;
subreq = cli_smb_req_create(state, ev, cli, SMBwriteX, 0, wct, vwv,
2, state->iov);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, cli_write_andx_done, req);
*psmbreq = subreq;
return req;
}
struct tevent_req *cli_write_andx_send(TALLOC_CTX *mem_ctx,
struct event_context *ev,
struct cli_state *cli, uint16_t fnum,
uint16_t mode, const uint8_t *buf,
off_t offset, size_t size)
{
struct tevent_req *req, *subreq;
NTSTATUS status;
req = cli_write_andx_create(mem_ctx, ev, cli, fnum, mode, buf, offset,
size, NULL, 0, &subreq);
if (req == NULL) {
return NULL;
}
status = cli_smb_req_send(subreq);
if (tevent_req_nterror(req, status)) {
return tevent_req_post(req, ev);
}
return req;
}
static void cli_write_andx_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct cli_write_andx_state *state = tevent_req_data(
req, struct cli_write_andx_state);
uint8_t wct;
uint16_t *vwv;
uint8_t *inbuf;
NTSTATUS status;
status = cli_smb_recv(subreq, state, &inbuf, 6, &wct, &vwv,
NULL, NULL);
TALLOC_FREE(subreq);
if (NT_STATUS_IS_ERR(status)) {
tevent_req_nterror(req, status);
return;
}
state->written = SVAL(vwv+2, 0);
state->written |= SVAL(vwv+4, 0)<<16;
tevent_req_done(req);
}
NTSTATUS cli_write_andx_recv(struct tevent_req *req, size_t *pwritten)
{
struct cli_write_andx_state *state = tevent_req_data(
req, struct cli_write_andx_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
return status;
}
if (pwritten != 0) {
*pwritten = state->written;
}
return NT_STATUS_OK;
}
struct cli_writeall_state {
struct event_context *ev;
struct cli_state *cli;
uint16_t fnum;
uint16_t mode;
const uint8_t *buf;
off_t offset;
size_t size;
size_t written;
};
static void cli_writeall_written(struct tevent_req *req);
static struct tevent_req *cli_writeall_send(TALLOC_CTX *mem_ctx,
struct event_context *ev,
struct cli_state *cli,
uint16_t fnum,
uint16_t mode,
const uint8_t *buf,
off_t offset, size_t size)
{
struct tevent_req *req, *subreq;
struct cli_writeall_state *state;
req = tevent_req_create(mem_ctx, &state, struct cli_writeall_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
state->cli = cli;
state->fnum = fnum;
state->mode = mode;
state->buf = buf;
state->offset = offset;
state->size = size;
state->written = 0;
subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
state->mode, state->buf, state->offset,
state->size);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, cli_writeall_written, req);
return req;
}
static void cli_writeall_written(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct cli_writeall_state *state = tevent_req_data(
req, struct cli_writeall_state);
NTSTATUS status;
size_t written, to_write;
status = cli_write_andx_recv(subreq, &written);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
state->written += written;
if (state->written > state->size) {
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
return;
}
to_write = state->size - state->written;
if (to_write == 0) {
tevent_req_done(req);
return;
}
subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
state->mode,
state->buf + state->written,
state->offset + state->written, to_write);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, cli_writeall_written, req);
}
static NTSTATUS cli_writeall_recv(struct tevent_req *req,
size_t *pwritten)
{
struct cli_writeall_state *state = tevent_req_data(
req, struct cli_writeall_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
return status;
}
if (pwritten != NULL) {
*pwritten = state->written;
}
return NT_STATUS_OK;
}
NTSTATUS cli_writeall(struct cli_state *cli, uint16_t fnum, uint16_t mode,
const uint8_t *buf, off_t offset, size_t size,
size_t *pwritten)
{
TALLOC_CTX *frame = talloc_stackframe();
struct event_context *ev;
struct tevent_req *req;
NTSTATUS status = NT_STATUS_NO_MEMORY;
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 = event_context_init(frame);
if (ev == NULL) {
goto fail;
}
req = cli_writeall_send(frame, ev, cli, fnum, mode, buf, offset, size);
if (req == NULL) {
goto fail;
}
if (!tevent_req_poll(req, ev)) {
status = map_nt_error_from_unix(errno);
goto fail;
}
status = cli_writeall_recv(req, pwritten);
fail:
TALLOC_FREE(frame);
return status;
}
struct cli_push_write_state {
struct tevent_req *req;/* This is the main request! Not the subreq */
uint32_t idx;
off_t ofs;
uint8_t *buf;
size_t size;
};
struct cli_push_state {
struct event_context *ev;
struct cli_state *cli;
uint16_t fnum;
uint16_t mode;
off_t start_offset;
size_t window_size;
size_t (*source)(uint8_t *buf, size_t n, void *priv);
void *priv;
bool eof;
size_t chunk_size;
off_t next_offset;
/*
* Outstanding requests
*/
uint32_t pending;
uint32_t num_reqs;
struct cli_push_write_state **reqs;
};
static void cli_push_written(struct tevent_req *req);
static bool cli_push_write_setup(struct tevent_req *req,
struct cli_push_state *state,
uint32_t idx)
{
struct cli_push_write_state *substate;
struct tevent_req *subreq;
substate = talloc(state->reqs, struct cli_push_write_state);
if (!substate) {
return false;
}
substate->req = req;
substate->idx = idx;
substate->ofs = state->next_offset;
substate->buf = talloc_array(substate, uint8_t, state->chunk_size);
if (!substate->buf) {
talloc_free(substate);
return false;
}
substate->size = state->source(substate->buf,
state->chunk_size,
state->priv);
if (substate->size == 0) {
state->eof = true;
/* nothing to send */
talloc_free(substate);
return true;
}
subreq = cli_writeall_send(substate,
state->ev, state->cli,
state->fnum, state->mode,
substate->buf,
substate->ofs,
substate->size);
if (!subreq) {
talloc_free(substate);
return false;
}
tevent_req_set_callback(subreq, cli_push_written, substate);
state->reqs[idx] = substate;
state->pending += 1;
state->next_offset += substate->size;
return true;
}
struct tevent_req *cli_push_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
struct cli_state *cli,
uint16_t fnum, uint16_t mode,
off_t start_offset, size_t window_size,
size_t (*source)(uint8_t *buf, size_t n,
void *priv),
void *priv)
{
struct tevent_req *req;
struct cli_push_state *state;
uint32_t i;
req = tevent_req_create(mem_ctx, &state, struct cli_push_state);
if (req == NULL) {
return NULL;
}
state->cli = cli;
state->ev = ev;
state->fnum = fnum;
state->start_offset = start_offset;
state->mode = mode;
state->source = source;
state->priv = priv;
state->eof = false;
state->pending = 0;
state->next_offset = start_offset;
state->chunk_size = cli_write_max_bufsize(cli, mode, 14);
if (window_size == 0) {
window_size = cli->max_mux * state->chunk_size;
}
state->num_reqs = window_size/state->chunk_size;
if ((window_size % state->chunk_size) > 0) {
state->num_reqs += 1;
}
state->num_reqs = MIN(state->num_reqs, cli->max_mux);
state->num_reqs = MAX(state->num_reqs, 1);
state->reqs = talloc_zero_array(state, struct cli_push_write_state *,
state->num_reqs);
if (state->reqs == NULL) {
goto failed;
}
for (i=0; inum_reqs; i++) {
if (!cli_push_write_setup(req, state, i)) {
goto failed;
}
if (state->eof) {
break;
}
}
if (state->pending == 0) {
tevent_req_done(req);
return tevent_req_post(req, ev);
}
return req;
failed:
tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
return tevent_req_post(req, ev);
}
static void cli_push_written(struct tevent_req *subreq)
{
struct cli_push_write_state *substate = tevent_req_callback_data(
subreq, struct cli_push_write_state);
struct tevent_req *req = substate->req;
struct cli_push_state *state = tevent_req_data(
req, struct cli_push_state);
NTSTATUS status;
uint32_t idx = substate->idx;
state->reqs[idx] = NULL;
state->pending -= 1;
status = cli_writeall_recv(subreq, NULL);
TALLOC_FREE(subreq);
TALLOC_FREE(substate);
if (tevent_req_nterror(req, status)) {
return;
}
if (!state->eof) {
if (!cli_push_write_setup(req, state, idx)) {
tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
return;
}
}
if (state->pending == 0) {
tevent_req_done(req);
return;
}
}
NTSTATUS cli_push_recv(struct tevent_req *req)
{
return tevent_req_simple_recv_ntstatus(req);
}
NTSTATUS cli_push(struct cli_state *cli, uint16_t fnum, uint16_t mode,
off_t start_offset, size_t window_size,
size_t (*source)(uint8_t *buf, size_t n, void *priv),
void *priv)
{
TALLOC_CTX *frame = talloc_stackframe();
struct event_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 = event_context_init(frame);
if (ev == NULL) {
status = NT_STATUS_NO_MEMORY;
goto fail;
}
req = cli_push_send(frame, ev, cli, fnum, mode, start_offset,
window_size, source, priv);
if (req == NULL) {
status = NT_STATUS_NO_MEMORY;
goto fail;
}
if (!tevent_req_poll(req, ev)) {
status = map_nt_error_from_unix(errno);
goto fail;
}
status = cli_push_recv(req);
fail:
TALLOC_FREE(frame);
return status;
}