--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ Core SMB2 server
+
+ Copyright (C) Stefan Metzmacher 2009
+
+ 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 "smbd/globals.h"
+#include "../source4/libcli/smb2/smb2_constants.h"
+
+static struct tevent_req *smbd_smb2_notify_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct smbd_smb2_request *smb2req,
+ uint16_t in_flags,
+ uint32_t in_output_buffer_length,
+ uint64_t in_file_id_volatile,
+ uint64_t in_completion_filter);
+static NTSTATUS smbd_smb2_notify_recv(struct tevent_req *req,
+ TALLOC_CTX *mem_ctx,
+ DATA_BLOB *out_output_buffer);
+
+static void smbd_smb2_request_notify_done(struct tevent_req *subreq);
+NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req)
+{
+ const uint8_t *inhdr;
+ const uint8_t *inbody;
+ int i = req->current_idx;
+ size_t expected_body_size = 0x20;
+ size_t body_size;
+ uint16_t in_flags;
+ uint32_t in_output_buffer_length;
+ uint64_t in_file_id_persistent;
+ uint64_t in_file_id_volatile;
+ uint64_t in_completion_filter;
+ struct tevent_req *subreq;
+
+ inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
+ if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
+
+ body_size = SVAL(inbody, 0x00);
+ if (body_size != expected_body_size) {
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ in_flags = SVAL(inbody, 0x02);
+ in_output_buffer_length = IVAL(inbody, 0x04);
+ in_file_id_persistent = BVAL(inbody, 0x08);
+ in_file_id_volatile = BVAL(inbody, 0x10);
+ in_completion_filter = IVAL(inbody, 0x18);
+
+ /*
+ * 0x00010000 is what Windows 7 uses,
+ * Windows 2008 uses 0x00080000
+ */
+ if (in_output_buffer_length > 0x00010000) {
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ if (req->compat_chain_fsp) {
+ /* skip check */
+ } else if (in_file_id_persistent != 0) {
+ return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
+ }
+
+ subreq = smbd_smb2_notify_send(req,
+ req->conn->smb2.event_ctx,
+ req,
+ in_flags,
+ in_output_buffer_length,
+ in_file_id_volatile,
+ in_completion_filter);
+ if (subreq == NULL) {
+ return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+ }
+ tevent_req_set_callback(subreq, smbd_smb2_request_notify_done, req);
+
+ if (tevent_req_is_in_progress(subreq)) {
+ return smbd_smb2_request_pending_queue(req);
+ }
+
+ return NT_STATUS_OK;
+}
+
+static void smbd_smb2_request_notify_done(struct tevent_req *subreq)
+{
+ struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
+ struct smbd_smb2_request);
+ int i = req->current_idx;
+ uint8_t *outhdr;
+ DATA_BLOB outbody;
+ DATA_BLOB outdyn;
+ uint16_t out_output_buffer_offset;
+ DATA_BLOB out_output_buffer;
+ NTSTATUS status;
+ NTSTATUS error; /* transport error */
+
+ status = smbd_smb2_notify_recv(subreq,
+ req,
+ &out_output_buffer);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ error = smbd_smb2_request_error(req, status);
+ if (!NT_STATUS_IS_OK(error)) {
+ smbd_server_connection_terminate(req->conn,
+ nt_errstr(error));
+ return;
+ }
+ return;
+ }
+
+ out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
+
+ outhdr = (uint8_t *)req->out.vector[i].iov_base;
+
+ outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
+ if (outbody.data == NULL) {
+ error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+ if (!NT_STATUS_IS_OK(error)) {
+ smbd_server_connection_terminate(req->conn,
+ nt_errstr(error));
+ return;
+ }
+ return;
+ }
+
+ SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
+ SSVAL(outbody.data, 0x02,
+ out_output_buffer_offset); /* output buffer offset */
+ SIVAL(outbody.data, 0x04,
+ out_output_buffer.length); /* output buffer length */
+
+ outdyn = out_output_buffer;
+
+ error = smbd_smb2_request_done(req, outbody, &outdyn);
+ if (!NT_STATUS_IS_OK(error)) {
+ smbd_server_connection_terminate(req->conn,
+ nt_errstr(error));
+ return;
+ }
+}
+
+struct smbd_smb2_notify_state {
+ struct smbd_smb2_request *smb2req;
+ struct tevent_immediate *im;
+ NTSTATUS status;
+ DATA_BLOB out_output_buffer;
+};
+
+static void smbd_smb2_notify_reply(struct smb_request *smbreq,
+ NTSTATUS error_code,
+ uint8_t *buf, size_t len);
+static void smbd_smb2_notify_reply_trigger(struct tevent_context *ctx,
+ struct tevent_immediate *im,
+ void *private_data);
+
+static struct tevent_req *smbd_smb2_notify_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct smbd_smb2_request *smb2req,
+ uint16_t in_flags,
+ uint32_t in_output_buffer_length,
+ uint64_t in_file_id_volatile,
+ uint64_t in_completion_filter)
+{
+ struct tevent_req *req;
+ struct smbd_smb2_notify_state *state;
+ struct smb_request *smbreq;
+ connection_struct *conn = smb2req->tcon->compat_conn;
+ files_struct *fsp;
+ bool recursive = (in_flags & 0x0001) ? true : false;
+ NTSTATUS status;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct smbd_smb2_notify_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->smb2req = smb2req;
+ state->status = NT_STATUS_INTERNAL_ERROR;
+ state->out_output_buffer = data_blob_null;
+ state->im = NULL;
+
+ DEBUG(10,("smbd_smb2_notify_send: file_id[0x%016llX]\n",
+ (unsigned long long)in_file_id_volatile));
+
+ smbreq = smbd_smb2_fake_smb_request(smb2req);
+ if (tevent_req_nomem(smbreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+
+ smbreq->async_priv = (void *)req;
+
+ fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
+ if (fsp == NULL) {
+ tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
+ return tevent_req_post(req, ev);
+ }
+ if (conn != fsp->conn) {
+ tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
+ return tevent_req_post(req, ev);
+ }
+ if (smb2req->session->vuid != fsp->vuid) {
+ tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
+ return tevent_req_post(req, ev);
+ }
+
+ {
+ char *filter_string;
+
+ filter_string = notify_filter_string(NULL, in_completion_filter);
+ if (tevent_req_nomem(filter_string, req)) {
+ return tevent_req_post(req, ev);
+ }
+
+ DEBUG(3,("smbd_smb2_notify_send: notify change "
+ "called on %s, filter = %s, recursive = %d\n",
+ fsp->fsp_name, filter_string, recursive));
+
+ TALLOC_FREE(filter_string);
+ }
+
+ if ((!fsp->is_directory) || (conn != fsp->conn)) {
+ tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
+ return tevent_req_post(req, ev);
+ }
+
+ if (fsp->notify == NULL) {
+
+ status = change_notify_create(fsp,
+ in_completion_filter,
+ recursive);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("change_notify_create returned %s\n",
+ nt_errstr(status)));
+ tevent_req_nterror(req, status);
+ return tevent_req_post(req, ev);
+ }
+ }
+
+ if (fsp->notify->num_changes != 0) {
+
+ /*
+ * We've got changes pending, respond immediately
+ */
+
+ /*
+ * TODO: write a torture test to check the filtering behaviour
+ * here.
+ */
+
+ change_notify_reply(fsp->conn, smbreq,
+ NT_STATUS_OK,
+ in_output_buffer_length,
+ fsp->notify,
+ smbd_smb2_notify_reply);
+
+ /*
+ * change_notify_reply() above has independently
+ * called tevent_req_done().
+ */
+ return tevent_req_post(req, ev);
+ }
+
+ state->im = tevent_create_immediate(state);
+ if (tevent_req_nomem(state->im, req)) {
+ return tevent_req_post(req, ev);
+ }
+
+ /*
+ * No changes pending, queue the request
+ */
+
+ status = change_notify_add_request(smbreq,
+ in_output_buffer_length,
+ in_completion_filter,
+ recursive, fsp,
+ smbd_smb2_notify_reply);
+ if (!NT_STATUS_IS_OK(status)) {
+ tevent_req_nterror(req, status);
+ return tevent_req_post(req, ev);
+ }
+
+ return req;
+}
+
+static void smbd_smb2_notify_reply(struct smb_request *smbreq,
+ NTSTATUS error_code,
+ uint8_t *buf, size_t len)
+{
+ struct tevent_req *req = talloc_get_type_abort(smbreq->async_priv,
+ struct tevent_req);
+ struct smbd_smb2_notify_state *state = tevent_req_data(req,
+ struct smbd_smb2_notify_state);
+
+ state->status = error_code;
+ if (!NT_STATUS_IS_OK(error_code)) {
+ /* nothing */
+ } else if (len == 0) {
+ state->status = STATUS_NOTIFY_ENUM_DIR;
+ } else {
+ state->out_output_buffer = data_blob_talloc(state, buf, len);
+ if (state->out_output_buffer.data == NULL) {
+ state->status = NT_STATUS_NO_MEMORY;
+ }
+ }
+
+ if (state->im == NULL) {
+ smbd_smb2_notify_reply_trigger(NULL, NULL, req);
+ return;
+ }
+
+ /*
+ * if this is called async, we need to go via an immediate event
+ * because the caller replies on the smb_request (a child of req
+ * being arround after calling this function
+ */
+ tevent_schedule_immediate(state->im,
+ state->smb2req->conn->smb2.event_ctx,
+ smbd_smb2_notify_reply_trigger,
+ req);
+}
+
+static void smbd_smb2_notify_reply_trigger(struct tevent_context *ctx,
+ struct tevent_immediate *im,
+ void *private_data)
+{
+ struct tevent_req *req = talloc_get_type_abort(private_data,
+ struct tevent_req);
+ struct smbd_smb2_notify_state *state = tevent_req_data(req,
+ struct smbd_smb2_notify_state);
+
+ if (!NT_STATUS_IS_OK(state->status)) {
+ tevent_req_nterror(req, state->status);
+ return;
+ }
+
+ tevent_req_done(req);
+}
+
+static NTSTATUS smbd_smb2_notify_recv(struct tevent_req *req,
+ TALLOC_CTX *mem_ctx,
+ DATA_BLOB *out_output_buffer)
+{
+ NTSTATUS status;
+ struct smbd_smb2_notify_state *state = tevent_req_data(req,
+ struct smbd_smb2_notify_state);
+
+ if (tevent_req_is_nterror(req, &status)) {
+ tevent_req_received(req);
+ return status;
+ }
+
+ *out_output_buffer = state->out_output_buffer;
+ talloc_steal(mem_ctx, out_output_buffer->data);
+
+ tevent_req_received(req);
+ return NT_STATUS_OK;
+}
git.samba.org / kai / samba-autobuild / .git / commitdiff