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-rw-r--r--source3/libsmb/clireadwrite.c406
1 files changed, 406 insertions, 0 deletions
diff --git a/source3/libsmb/clireadwrite.c b/source3/libsmb/clireadwrite.c
index 0c65505793..b33d0f0938 100644
--- a/source3/libsmb/clireadwrite.c
+++ b/source3/libsmb/clireadwrite.c
@@ -744,3 +744,409 @@ ssize_t cli_smbwrite(struct cli_state *cli,
return total;
}
+
+/*
+ * Send a write&x request
+ */
+
+struct async_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)
+{
+ bool bigoffset = ((cli->capabilities & CAP_LARGE_FILES) != 0);
+ uint8_t wct = bigoffset ? 14 : 12;
+ size_t max_write = cli_write_max_bufsize(cli, mode);
+ uint16_t vwv[14];
+
+ size = MIN(size, max_write);
+
+ 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_wct_ofs(cli)
+ + 1 /* the wct field */
+ + wct * 2 /* vwv */
+ + 2 /* num_bytes field */
+ + 1 /* pad */);
+
+ if (bigoffset) {
+ SIVAL(vwv+12, 0, (((uint64_t)offset)>>32) & 0xffffffff);
+ }
+
+ return cli_request_send(mem_ctx, ev, cli, SMBwriteX, 0, wct, vwv,
+ 2, size, buf);
+}
+
+NTSTATUS cli_write_andx_recv(struct async_req *req, size_t *pwritten)
+{
+ uint8_t wct;
+ uint16_t *vwv;
+ uint16_t num_bytes;
+ uint8_t *bytes;
+ NTSTATUS status;
+ size_t written;
+
+ if (async_req_is_error(req, &status)) {
+ return status;
+ }
+
+ status = cli_pull_reply(req, &wct, &vwv, &num_bytes, &bytes);
+
+ if (NT_STATUS_IS_ERR(status)) {
+ return status;
+ }
+
+ if (wct < 6) {
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+
+ written = SVAL(vwv+2, 0);
+ written |= SVAL(vwv+4, 0)<<16;
+ *pwritten = 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 async_req *req);
+
+static struct async_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 async_req *result;
+ struct async_req *subreq;
+ struct cli_writeall_state *state;
+
+ result = async_req_new(mem_ctx, ev);
+ if (result == NULL) {
+ goto fail;
+ }
+ state = talloc(result, struct cli_writeall_state);
+ if (state == NULL) {
+ goto fail;
+ }
+ result->private_data = state;
+
+ 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 (subreq == NULL) {
+ goto fail;
+ }
+
+ subreq->async.fn = cli_writeall_written;
+ subreq->async.priv = result;
+ return result;
+
+ fail:
+ TALLOC_FREE(result);
+ return NULL;
+}
+
+static void cli_writeall_written(struct async_req *subreq)
+{
+ struct async_req *req = talloc_get_type_abort(
+ subreq->async.priv, struct async_req);
+ struct cli_writeall_state *state = talloc_get_type_abort(
+ req->private_data, struct cli_writeall_state);
+ NTSTATUS status;
+ size_t written, to_write;
+
+ status = cli_write_andx_recv(subreq, &written);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ async_req_error(req, status);
+ return;
+ }
+
+ state->written += written;
+
+ if (state->written > state->size) {
+ async_req_error(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
+ return;
+ }
+
+ to_write = state->size - state->written;
+
+ if (to_write == 0) {
+ async_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 (subreq == NULL) {
+ async_req_error(req, NT_STATUS_NO_MEMORY);
+ return;
+ }
+
+ subreq->async.fn = cli_writeall_written;
+ subreq->async.priv = req;
+}
+
+static NTSTATUS cli_writeall_recv(struct async_req *req)
+{
+ return async_req_simple_recv(req);
+}
+
+struct cli_push_state {
+ struct async_req *req;
+
+ 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;
+
+ size_t chunk_size;
+
+ size_t sent;
+ bool eof;
+
+ /*
+ * Outstanding requests
+ */
+ int num_reqs;
+ struct async_req **reqs;
+
+ int pending;
+
+ uint8_t *buf;
+};
+
+static void cli_push_written(struct async_req *req);
+
+struct async_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 async_req *result;
+ struct cli_push_state *state;
+ int i;
+
+ result = async_req_new(mem_ctx, ev);
+ if (result == NULL) {
+ goto failed;
+ }
+ state = talloc(result, struct cli_push_state);
+ if (state == NULL) {
+ goto failed;
+ }
+ result->private_data = state;
+ state->req = result;
+
+ 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->sent = 0;
+ state->pending = 0;
+
+ state->chunk_size = cli_write_max_bufsize(cli, mode);
+
+ 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 async_req *,
+ state->num_reqs);
+ if (state->reqs == NULL) {
+ goto failed;
+ }
+
+ state->buf = TALLOC_ARRAY(
+ state, uint8_t, state->chunk_size * state->num_reqs);
+ if (state->buf == NULL) {
+ goto failed;
+ }
+
+ for (i=0; i<state->num_reqs; i++) {
+ size_t to_write;
+ uint8_t *buf = state->buf + i*state->chunk_size;
+
+ to_write = state->source(buf, state->chunk_size, state->priv);
+ if (to_write == 0) {
+ state->eof = true;
+ break;
+ }
+
+ state->reqs[i] = cli_writeall_send(
+ state->reqs, state->ev, state->cli, state->fnum,
+ state->mode, buf, state->start_offset + state->sent,
+ to_write);
+ if (state->reqs[i] == NULL) {
+ goto failed;
+ }
+
+ state->reqs[i]->async.fn = cli_push_written;
+ state->reqs[i]->async.priv = state;
+
+ state->sent += to_write;
+ state->pending += 1;
+ }
+
+ if (i == 0) {
+ if (!async_post_status(result, NT_STATUS_OK)) {
+ goto failed;
+ }
+ return result;
+ }
+
+ return result;
+
+ failed:
+ TALLOC_FREE(result);
+ return NULL;
+}
+
+static void cli_push_written(struct async_req *req)
+{
+ struct cli_push_state *state = talloc_get_type_abort(
+ req->async.priv, struct cli_push_state);
+ NTSTATUS status;
+ int i;
+ uint8_t *buf;
+ size_t to_write;
+
+ for (i=0; i<state->num_reqs; i++) {
+ if (state->reqs[i] == req) {
+ break;
+ }
+ }
+
+ if (i == state->num_reqs) {
+ async_req_error(state->req, NT_STATUS_INTERNAL_ERROR);
+ return;
+ }
+
+ status = cli_writeall_recv(req);
+ TALLOC_FREE(state->reqs[i]);
+ req = NULL;
+ if (!NT_STATUS_IS_OK(status)) {
+ async_req_error(state->req, status);
+ return;
+ }
+
+ state->pending -= 1;
+ if (state->pending == 0) {
+ async_req_done(state->req);
+ return;
+ }
+
+ if (state->eof) {
+ return;
+ }
+
+ buf = state->buf + i * state->chunk_size;
+
+ to_write = state->source(buf, state->chunk_size, state->priv);
+ if (to_write == 0) {
+ state->eof = true;
+ return;
+ }
+
+ state->reqs[i] = cli_writeall_send(
+ state->reqs, state->ev, state->cli, state->fnum,
+ state->mode, buf, state->start_offset + state->sent, to_write);
+ if (state->reqs[i] == NULL) {
+ async_req_error(state->req, NT_STATUS_NO_MEMORY);
+ return;
+ }
+
+ state->reqs[i]->async.fn = cli_push_written;
+ state->reqs[i]->async.priv = state;
+
+ state->sent += to_write;
+ state->pending += 1;
+}
+
+NTSTATUS cli_push_recv(struct async_req *req)
+{
+ return async_req_simple_recv(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 async_req *req;
+ NTSTATUS result = NT_STATUS_NO_MEMORY;
+
+ if (cli->fd_event != NULL) {
+ /*
+ * Can't use sync call while an async call is in flight
+ */
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ ev = event_context_init(frame);
+ if (ev == NULL) {
+ goto nomem;
+ }
+
+ req = cli_push_send(frame, ev, cli, fnum, mode, start_offset,
+ window_size, source, priv);
+ if (req == NULL) {
+ goto nomem;
+ }
+
+ while (req->state < ASYNC_REQ_DONE) {
+ event_loop_once(ev);
+ }
+
+ result = cli_push_recv(req);
+ nomem:
+ TALLOC_FREE(frame);
+ return result;
+}
generated by cgit (git 2.34.1) at 2024-11-24 01:10:25 +0000