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b2d9c02665
Signed-off-by: Stefan Metzmacher <metze@samba.org>
252 lines
6.4 KiB
C
252 lines
6.4 KiB
C
/*
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Unix SMB/CIFS implementation.
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smb2 lib
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Copyright (C) Stefan Metzmacher 2012
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "system/network.h"
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#include "lib/util/tevent_ntstatus.h"
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#include "smb_common.h"
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#include "smbXcli_base.h"
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struct smb2cli_query_info_state {
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uint8_t fixed[0x28];
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uint8_t dyn_pad[1];
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uint32_t max_output_length;
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struct iovec *recv_iov;
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DATA_BLOB out_output_buffer;
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};
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static void smb2cli_query_info_done(struct tevent_req *subreq);
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struct tevent_req *smb2cli_query_info_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct smbXcli_conn *conn,
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uint32_t timeout_msec,
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struct smbXcli_session *session,
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uint32_t tcon_id,
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uint8_t in_info_type,
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uint8_t in_file_info_class,
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uint32_t in_max_output_length,
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const DATA_BLOB *in_input_buffer,
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uint32_t in_additional_info,
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uint32_t in_flags,
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uint64_t in_fid_persistent,
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uint64_t in_fid_volatile)
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{
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struct tevent_req *req, *subreq;
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struct smb2cli_query_info_state *state;
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uint8_t *fixed;
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uint8_t *dyn;
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size_t dyn_len;
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uint16_t input_buffer_offset = 0;
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uint32_t input_buffer_length = 0;
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req = tevent_req_create(mem_ctx, &state,
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struct smb2cli_query_info_state);
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if (req == NULL) {
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return NULL;
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}
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state->max_output_length = in_max_output_length;
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if (in_input_buffer) {
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input_buffer_offset = SMB2_HDR_BODY+0x28;
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input_buffer_length = in_input_buffer->length;
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}
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fixed = state->fixed;
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SSVAL(fixed, 0x00, 0x29);
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SCVAL(fixed, 0x02, in_info_type);
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SCVAL(fixed, 0x03, in_file_info_class); /* reserved */
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SIVAL(fixed, 0x04, in_max_output_length);
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SSVAL(fixed, 0x08, input_buffer_offset);
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SSVAL(fixed, 0x0A, 0); /* reserved */
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SIVAL(fixed, 0x0C, input_buffer_length);
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SIVAL(fixed, 0x10, in_additional_info);
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SIVAL(fixed, 0x14, in_flags);
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SBVAL(fixed, 0x18, in_fid_persistent);
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SBVAL(fixed, 0x20, in_fid_volatile);
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if (input_buffer_length > 0) {
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dyn = in_input_buffer->data;
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dyn_len = in_input_buffer->length;
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} else {
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dyn = state->dyn_pad;
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dyn_len = sizeof(state->dyn_pad);
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}
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subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_GETINFO,
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0, 0, /* flags */
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timeout_msec,
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0xFEFF, /* pid */
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tcon_id,
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session,
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state->fixed, sizeof(state->fixed),
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dyn, dyn_len);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq, smb2cli_query_info_done, req);
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return req;
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}
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static void smb2cli_query_info_done(struct tevent_req *subreq)
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{
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struct tevent_req *req =
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tevent_req_callback_data(subreq,
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struct tevent_req);
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struct smb2cli_query_info_state *state =
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tevent_req_data(req,
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struct smb2cli_query_info_state);
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NTSTATUS status;
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struct iovec *iov;
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uint8_t *fixed;
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uint8_t *dyn;
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size_t dyn_len;
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uint32_t dyn_ofs = SMB2_HDR_BODY + 0x08;
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uint32_t output_buffer_offset;
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uint32_t output_buffer_length;
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static const struct smb2cli_req_expected_response expected[] = {
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{
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.status = NT_STATUS_OK,
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.body_size = 0x09
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},
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{
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.status = STATUS_BUFFER_OVERFLOW,
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.body_size = 0x09
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}
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};
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status = smb2cli_req_recv(subreq, state, &iov,
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expected, ARRAY_SIZE(expected));
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if (tevent_req_nterror(req, status)) {
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return;
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}
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state->recv_iov = iov;
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fixed = (uint8_t *)iov[1].iov_base;
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dyn = (uint8_t *)iov[2].iov_base;
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dyn_len = iov[2].iov_len;
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output_buffer_offset = SVAL(fixed, 0x02);
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output_buffer_length = IVAL(fixed, 0x04);
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if ((output_buffer_offset > 0) && (output_buffer_length > 0)) {
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if (output_buffer_offset != dyn_ofs) {
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tevent_req_nterror(
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req, NT_STATUS_INVALID_NETWORK_RESPONSE);
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return;
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}
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if (output_buffer_length < dyn_len) {
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tevent_req_nterror(
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req, NT_STATUS_INVALID_NETWORK_RESPONSE);
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return;
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}
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if (output_buffer_length > state->max_output_length) {
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tevent_req_nterror(
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req, NT_STATUS_INVALID_NETWORK_RESPONSE);
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return;
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}
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state->out_output_buffer.data = dyn;
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state->out_output_buffer.length = output_buffer_length;
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}
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tevent_req_done(req);
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}
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NTSTATUS smb2cli_query_info_recv(struct tevent_req *req,
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TALLOC_CTX *mem_ctx,
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DATA_BLOB *out_output_buffer)
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{
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struct smb2cli_query_info_state *state =
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tevent_req_data(req,
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struct smb2cli_query_info_state);
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NTSTATUS status;
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if (tevent_req_is_nterror(req, &status)) {
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tevent_req_received(req);
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return status;
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}
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talloc_steal(mem_ctx, state->recv_iov);
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if (out_output_buffer) {
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*out_output_buffer = state->out_output_buffer;
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}
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tevent_req_received(req);
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return NT_STATUS_OK;
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}
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NTSTATUS smb2cli_query_info(struct smbXcli_conn *conn,
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uint32_t timeout_msec,
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struct smbXcli_session *session,
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uint32_t tcon_id,
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uint8_t in_info_type,
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uint8_t in_file_info_class,
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uint32_t in_max_output_length,
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const DATA_BLOB *in_input_buffer,
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uint32_t in_additional_info,
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uint32_t in_flags,
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uint64_t in_fid_persistent,
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uint64_t in_fid_volatile,
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TALLOC_CTX *mem_ctx,
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DATA_BLOB *out_output_buffer)
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{
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TALLOC_CTX *frame = talloc_stackframe();
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struct tevent_context *ev;
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struct tevent_req *req;
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NTSTATUS status = NT_STATUS_NO_MEMORY;
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if (smbXcli_conn_has_async_calls(conn)) {
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/*
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* Can't use sync call while an async call is in flight
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*/
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status = NT_STATUS_INVALID_PARAMETER_MIX;
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goto fail;
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}
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ev = tevent_context_init(frame);
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if (ev == NULL) {
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goto fail;
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}
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req = smb2cli_query_info_send(frame, ev,
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conn, timeout_msec,
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session, tcon_id,
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in_info_type,
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in_file_info_class,
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in_max_output_length,
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in_input_buffer,
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in_additional_info,
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in_flags,
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in_fid_persistent,
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in_fid_volatile);
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if (req == NULL) {
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goto fail;
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}
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if (!tevent_req_poll_ntstatus(req, ev, &status)) {
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goto fail;
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}
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status = smb2cli_query_info_recv(req, mem_ctx,
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out_output_buffer);
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fail:
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TALLOC_FREE(frame);
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return status;
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}
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