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-rw-r--r--libcli/smb/smb2cli_read.c187
-rw-r--r--libcli/smb/smbXcli_base.h28
-rwxr-xr-xlibcli/smb/wscript_build1
3 files changed, 216 insertions, 0 deletions
diff --git a/libcli/smb/smb2cli_read.c b/libcli/smb/smb2cli_read.c
new file mode 100644
index 0000000000..29b9f378e6
--- /dev/null
+++ b/libcli/smb/smb2cli_read.c
@@ -0,0 +1,187 @@
+/*
+ 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 "system/network.h"
+#include "lib/util/tevent_ntstatus.h"
+#include "smb_common.h"
+#include "smbXcli_base.h"
+
+struct smb2cli_read_state {
+ uint8_t fixed[48];
+ uint8_t dyn_pad[1];
+ struct iovec *recv_iov;
+ 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 smbXcli_conn *conn,
+ uint32_t timeout_msec,
+ struct smbXcli_session *session,
+ uint32_t tcon_id,
+ 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, conn, SMB2_OP_READ,
+ 0, 0, /* flags */
+ timeout_msec,
+ 0xFEFF, /* pid */
+ tcon_id,
+ session,
+ state->fixed, sizeof(state->fixed),
+ state->dyn_pad, sizeof(state->dyn_pad));
+ 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;
+ static const struct smb2cli_req_expected_response expected[] = {
+ {
+ .status = STATUS_BUFFER_OVERFLOW,
+ .body_size = 0x11
+ },
+ {
+ .status = NT_STATUS_OK,
+ .body_size = 0x11
+ }
+ };
+
+ status = smb2cli_req_recv(subreq, state, &iov,
+ expected, ARRAY_SIZE(expected));
+ 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->recv_iov = iov;
+ 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->recv_iov);
+ *data_length = state->data_length;
+ *data = state->data;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS smb2cli_read(struct smbXcli_conn *conn,
+ uint32_t timeout_msec,
+ struct smbXcli_session *session,
+ uint32_t tcon_id,
+ 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 tevent_context *ev;
+ struct tevent_req *req;
+ NTSTATUS status = NT_STATUS_NO_MEMORY;
+
+ if (smbXcli_conn_has_async_calls(conn)) {
+ /*
+ * 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) {
+ goto fail;
+ }
+ req = smb2cli_read_send(frame, ev,
+ conn, timeout_msec, session, tcon_id,
+ 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;
+}
diff --git a/libcli/smb/smbXcli_base.h b/libcli/smb/smbXcli_base.h
index baac22c555..3d1f393877 100644
--- a/libcli/smb/smbXcli_base.h
+++ b/libcli/smb/smbXcli_base.h
@@ -343,4 +343,32 @@ NTSTATUS smb2cli_close(struct smbXcli_conn *conn,
uint64_t fid_persistent,
uint64_t fid_volatile);
+struct tevent_req *smb2cli_read_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct smbXcli_conn *conn,
+ uint32_t timeout_msec,
+ struct smbXcli_session *session,
+ uint32_t tcon_id,
+ 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 smbXcli_conn *conn,
+ uint32_t timeout_msec,
+ struct smbXcli_session *session,
+ uint32_t tcon_id,
+ 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 /* _SMBXCLI_BASE_H_ */
diff --git a/libcli/smb/wscript_build b/libcli/smb/wscript_build
index 904e895878..69f9f032ae 100755
--- a/libcli/smb/wscript_build
+++ b/libcli/smb/wscript_build
@@ -11,6 +11,7 @@ bld.SAMBA_LIBRARY('cli_smb_common',
smb2cli_session.c
smb2cli_create.c
smb2cli_close.c
+ smb2cli_read.c
''',
deps='LIBCRYPTO errors gensec krb5samba LIBASYNC_REQ',
public_deps='talloc samba-util',
generated by cgit (git 2.34.1) at 2024-11-19 09:18:00 +0000