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-rw-r--r--source3/libsmb/smb2cli.h22
-rw-r--r--source3/libsmb/smb2cli_read.c163
2 files changed, 185 insertions, 0 deletions
diff --git a/source3/libsmb/smb2cli.h b/source3/libsmb/smb2cli.h
index 31c593be89..ea128cf494 100644
--- a/source3/libsmb/smb2cli.h
+++ b/source3/libsmb/smb2cli.h
@@ -104,4 +104,26 @@ NTSTATUS smb2cli_flush(struct cli_state *cli,
uint64_t fid_persistent,
uint64_t fid_volatile);
+struct tevent_req *smb2cli_read_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct cli_state *cli,
+ uint32_t length,
+ uint64_t offset,
+ uint64_t fid_persistent,
+ uint64_t fid_volatile,
+ uint64_t minimum_count,
+ uint64_t remaining_bytes);
+NTSTATUS smb2cli_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ uint8_t **data, uint32_t *data_length);
+NTSTATUS smb2cli_read(struct cli_state *cli,
+ uint32_t length,
+ uint64_t offset,
+ uint64_t fid_persistent,
+ uint64_t fid_volatile,
+ uint64_t minimum_count,
+ uint64_t remaining_bytes,
+ TALLOC_CTX *mem_ctx,
+ uint8_t **data,
+ uint32_t *data_length);
+
#endif /* __SMB2CLI_H__ */
diff --git a/source3/libsmb/smb2cli_read.c b/source3/libsmb/smb2cli_read.c
new file mode 100644
index 0000000000..79224e517a
--- /dev/null
+++ b/source3/libsmb/smb2cli_read.c
@@ -0,0 +1,163 @@
+/*
+ Unix SMB/CIFS implementation.
+ smb2 lib
+ Copyright (C) Volker Lendecke 2011
+
+ 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 "client.h"
+#include "async_smb.h"
+#include "smb2cli_base.h"
+#include "smb2cli.h"
+#include "libsmb/proto.h"
+#include "lib/util/tevent_ntstatus.h"
+
+struct smb2cli_read_state {
+ uint8_t fixed[48];
+ uint8_t *inbuf;
+ uint8_t *data;
+ uint32_t data_length;
+};
+
+static void smb2cli_read_done(struct tevent_req *subreq);
+
+struct tevent_req *smb2cli_read_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct cli_state *cli,
+ uint32_t length,
+ uint64_t offset,
+ uint64_t fid_persistent,
+ uint64_t fid_volatile,
+ uint64_t minimum_count,
+ uint64_t remaining_bytes)
+{
+ struct tevent_req *req, *subreq;
+ struct smb2cli_read_state *state;
+ uint8_t *fixed;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct smb2cli_read_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ fixed = state->fixed;
+
+ SSVAL(fixed, 0, 49);
+ SIVAL(fixed, 4, length);
+ SBVAL(fixed, 8, offset);
+ SBVAL(fixed, 16, fid_persistent);
+ SBVAL(fixed, 24, fid_volatile);
+ SBVAL(fixed, 32, minimum_count);
+ SBVAL(fixed, 40, remaining_bytes);
+
+ subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_READ, 0,
+ state->fixed, sizeof(state->fixed),
+ NULL, 0);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, smb2cli_read_done, req);
+ return req;
+}
+
+static void smb2cli_read_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct smb2cli_read_state *state =
+ tevent_req_data(req,
+ struct smb2cli_read_state);
+ NTSTATUS status;
+ struct iovec *iov;
+ uint8_t data_offset;
+
+ status = smb2cli_req_recv(subreq, talloc_tos(), &iov, 17);
+ if (tevent_req_nterror(req, status)) {
+ return;
+ }
+
+ data_offset = CVAL(iov[1].iov_base, 2);
+ state->data_length = IVAL(iov[1].iov_base, 4);
+
+ if ((data_offset != SMB2_HDR_BODY + 16) ||
+ (state->data_length > iov[2].iov_len)) {
+ tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
+ return;
+ }
+ state->inbuf = smb2cli_req_inbuf(subreq);
+ state->data = (uint8_t *)iov[2].iov_base;
+ tevent_req_done(req);
+}
+
+NTSTATUS smb2cli_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ uint8_t **data, uint32_t *data_length)
+{
+ struct smb2cli_read_state *state =
+ tevent_req_data(req,
+ struct smb2cli_read_state);
+ NTSTATUS status;
+
+ if (tevent_req_is_nterror(req, &status)) {
+ return status;
+ }
+ talloc_steal(mem_ctx, state->inbuf);
+ *data_length = state->data_length;
+ *data = state->data;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS smb2cli_read(struct cli_state *cli,
+ uint32_t length,
+ uint64_t offset,
+ uint64_t fid_persistent,
+ uint64_t fid_volatile,
+ uint64_t minimum_count,
+ uint64_t remaining_bytes,
+ TALLOC_CTX *mem_ctx,
+ uint8_t **data,
+ uint32_t *data_length)
+{
+ 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 = smb2cli_read_send(frame, ev, cli, length, offset,
+ fid_persistent, fid_volatile,
+ minimum_count, remaining_bytes);
+ if (req == NULL) {
+ goto fail;
+ }
+ if (!tevent_req_poll_ntstatus(req, ev, &status)) {
+ goto fail;
+ }
+ status = smb2cli_read_recv(req, mem_ctx, data, data_length);
+ fail:
+ TALLOC_FREE(frame);
+ return status;
+}