mirror of
https://github.com/samba-team/samba.git
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s3:smbd: add support for SMB2 Notify
metze
This commit is contained in:
Stefan Metzmacher
parent
b804c30856
commit
d49a0e5f7d
@ -774,6 +774,7 @@ SMBD_OBJ_SRV = smbd/files.o smbd/chgpasswd.o smbd/connection.o \
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smbd/smb2_write.o \
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smbd/smb2_ioctl.o \
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smbd/smb2_keepalive.o \
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smbd/smb2_notify.o \
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$(MANGLE_OBJ) @VFS_STATIC@
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SMBD_OBJ_BASE = $(PARAM_WITHOUT_REG_OBJ) $(SMBD_OBJ_SRV) $(LIBSMB_OBJ) \
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@ -217,6 +217,7 @@ NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req);
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NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req);
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NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req);
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NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req);
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NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req);
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struct smbd_smb2_request {
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struct smbd_smb2_request *prev, *next;
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375
source3/smbd/smb2_notify.c
Normal file
375
source3/smbd/smb2_notify.c
Normal file
@ -0,0 +1,375 @@
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/*
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Unix SMB/CIFS implementation.
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Core SMB2 server
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Copyright (C) Stefan Metzmacher 2009
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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 "smbd/globals.h"
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#include "../source4/libcli/smb2/smb2_constants.h"
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static struct tevent_req *smbd_smb2_notify_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct smbd_smb2_request *smb2req,
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uint16_t in_flags,
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uint32_t in_output_buffer_length,
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uint64_t in_file_id_volatile,
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uint64_t in_completion_filter);
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static NTSTATUS smbd_smb2_notify_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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static void smbd_smb2_request_notify_done(struct tevent_req *subreq);
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NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req)
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{
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const uint8_t *inhdr;
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const uint8_t *inbody;
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int i = req->current_idx;
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size_t expected_body_size = 0x20;
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size_t body_size;
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uint16_t in_flags;
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uint32_t in_output_buffer_length;
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uint64_t in_file_id_persistent;
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uint64_t in_file_id_volatile;
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uint64_t in_completion_filter;
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struct tevent_req *subreq;
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inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
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if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
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body_size = SVAL(inbody, 0x00);
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if (body_size != expected_body_size) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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in_flags = SVAL(inbody, 0x02);
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in_output_buffer_length = IVAL(inbody, 0x04);
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in_file_id_persistent = BVAL(inbody, 0x08);
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in_file_id_volatile = BVAL(inbody, 0x10);
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in_completion_filter = IVAL(inbody, 0x18);
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/*
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* 0x00010000 is what Windows 7 uses,
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* Windows 2008 uses 0x00080000
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*/
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if (in_output_buffer_length > 0x00010000) {
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return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
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}
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if (req->compat_chain_fsp) {
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/* skip check */
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} else if (in_file_id_persistent != 0) {
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return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
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}
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subreq = smbd_smb2_notify_send(req,
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req->conn->smb2.event_ctx,
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req,
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in_flags,
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in_output_buffer_length,
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in_file_id_volatile,
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in_completion_filter);
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if (subreq == NULL) {
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return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
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}
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tevent_req_set_callback(subreq, smbd_smb2_request_notify_done, req);
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if (tevent_req_is_in_progress(subreq)) {
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return smbd_smb2_request_pending_queue(req);
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}
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return NT_STATUS_OK;
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}
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static void smbd_smb2_request_notify_done(struct tevent_req *subreq)
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{
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struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
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struct smbd_smb2_request);
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int i = req->current_idx;
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uint8_t *outhdr;
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DATA_BLOB outbody;
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DATA_BLOB outdyn;
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uint16_t out_output_buffer_offset;
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DATA_BLOB out_output_buffer;
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NTSTATUS status;
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NTSTATUS error; /* transport error */
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status = smbd_smb2_notify_recv(subreq,
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req,
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&out_output_buffer);
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TALLOC_FREE(subreq);
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if (!NT_STATUS_IS_OK(status)) {
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error = smbd_smb2_request_error(req, status);
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if (!NT_STATUS_IS_OK(error)) {
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smbd_server_connection_terminate(req->conn,
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nt_errstr(error));
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return;
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}
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return;
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}
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out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
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outhdr = (uint8_t *)req->out.vector[i].iov_base;
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outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
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if (outbody.data == NULL) {
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error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
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if (!NT_STATUS_IS_OK(error)) {
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smbd_server_connection_terminate(req->conn,
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nt_errstr(error));
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return;
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}
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return;
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}
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SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
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SSVAL(outbody.data, 0x02,
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out_output_buffer_offset); /* output buffer offset */
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SIVAL(outbody.data, 0x04,
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out_output_buffer.length); /* output buffer length */
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outdyn = out_output_buffer;
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error = smbd_smb2_request_done(req, outbody, &outdyn);
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if (!NT_STATUS_IS_OK(error)) {
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smbd_server_connection_terminate(req->conn,
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nt_errstr(error));
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return;
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}
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}
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struct smbd_smb2_notify_state {
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struct smbd_smb2_request *smb2req;
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struct tevent_immediate *im;
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NTSTATUS status;
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DATA_BLOB out_output_buffer;
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};
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static void smbd_smb2_notify_reply(struct smb_request *smbreq,
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NTSTATUS error_code,
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uint8_t *buf, size_t len);
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static void smbd_smb2_notify_reply_trigger(struct tevent_context *ctx,
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struct tevent_immediate *im,
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void *private_data);
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static struct tevent_req *smbd_smb2_notify_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct smbd_smb2_request *smb2req,
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uint16_t in_flags,
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uint32_t in_output_buffer_length,
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uint64_t in_file_id_volatile,
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uint64_t in_completion_filter)
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{
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struct tevent_req *req;
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struct smbd_smb2_notify_state *state;
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struct smb_request *smbreq;
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connection_struct *conn = smb2req->tcon->compat_conn;
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files_struct *fsp;
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bool recursive = (in_flags & 0x0001) ? true : false;
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NTSTATUS status;
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req = tevent_req_create(mem_ctx, &state,
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struct smbd_smb2_notify_state);
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if (req == NULL) {
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return NULL;
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}
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state->smb2req = smb2req;
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state->status = NT_STATUS_INTERNAL_ERROR;
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state->out_output_buffer = data_blob_null;
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state->im = NULL;
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DEBUG(10,("smbd_smb2_notify_send: file_id[0x%016llX]\n",
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(unsigned long long)in_file_id_volatile));
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smbreq = smbd_smb2_fake_smb_request(smb2req);
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if (tevent_req_nomem(smbreq, req)) {
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return tevent_req_post(req, ev);
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}
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smbreq->async_priv = (void *)req;
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fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
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if (fsp == NULL) {
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tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
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return tevent_req_post(req, ev);
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}
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if (conn != fsp->conn) {
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tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
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return tevent_req_post(req, ev);
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}
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if (smb2req->session->vuid != fsp->vuid) {
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tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
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return tevent_req_post(req, ev);
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}
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{
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char *filter_string;
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filter_string = notify_filter_string(NULL, in_completion_filter);
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if (tevent_req_nomem(filter_string, req)) {
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return tevent_req_post(req, ev);
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}
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DEBUG(3,("smbd_smb2_notify_send: notify change "
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"called on %s, filter = %s, recursive = %d\n",
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fsp->fsp_name, filter_string, recursive));
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TALLOC_FREE(filter_string);
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}
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if ((!fsp->is_directory) || (conn != fsp->conn)) {
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tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
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return tevent_req_post(req, ev);
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}
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if (fsp->notify == NULL) {
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status = change_notify_create(fsp,
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in_completion_filter,
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recursive);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(10, ("change_notify_create returned %s\n",
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nt_errstr(status)));
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tevent_req_nterror(req, status);
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return tevent_req_post(req, ev);
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}
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}
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if (fsp->notify->num_changes != 0) {
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/*
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* We've got changes pending, respond immediately
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*/
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/*
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* TODO: write a torture test to check the filtering behaviour
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* here.
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*/
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change_notify_reply(fsp->conn, smbreq,
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NT_STATUS_OK,
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in_output_buffer_length,
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fsp->notify,
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smbd_smb2_notify_reply);
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/*
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* change_notify_reply() above has independently
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* called tevent_req_done().
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*/
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return tevent_req_post(req, ev);
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}
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state->im = tevent_create_immediate(state);
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if (tevent_req_nomem(state->im, req)) {
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return tevent_req_post(req, ev);
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}
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/*
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* No changes pending, queue the request
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*/
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status = change_notify_add_request(smbreq,
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in_output_buffer_length,
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in_completion_filter,
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recursive, fsp,
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smbd_smb2_notify_reply);
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if (!NT_STATUS_IS_OK(status)) {
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tevent_req_nterror(req, status);
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return tevent_req_post(req, ev);
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}
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return req;
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}
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static void smbd_smb2_notify_reply(struct smb_request *smbreq,
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NTSTATUS error_code,
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uint8_t *buf, size_t len)
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{
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struct tevent_req *req = talloc_get_type_abort(smbreq->async_priv,
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struct tevent_req);
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struct smbd_smb2_notify_state *state = tevent_req_data(req,
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struct smbd_smb2_notify_state);
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state->status = error_code;
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if (!NT_STATUS_IS_OK(error_code)) {
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/* nothing */
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} else if (len == 0) {
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state->status = STATUS_NOTIFY_ENUM_DIR;
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} else {
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state->out_output_buffer = data_blob_talloc(state, buf, len);
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if (state->out_output_buffer.data == NULL) {
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state->status = NT_STATUS_NO_MEMORY;
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}
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}
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if (state->im == NULL) {
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smbd_smb2_notify_reply_trigger(NULL, NULL, req);
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return;
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}
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/*
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* if this is called async, we need to go via an immediate event
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* because the caller replies on the smb_request (a child of req
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* being arround after calling this function
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*/
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tevent_schedule_immediate(state->im,
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state->smb2req->conn->smb2.event_ctx,
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smbd_smb2_notify_reply_trigger,
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req);
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}
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static void smbd_smb2_notify_reply_trigger(struct tevent_context *ctx,
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struct tevent_immediate *im,
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void *private_data)
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{
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struct tevent_req *req = talloc_get_type_abort(private_data,
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struct tevent_req);
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struct smbd_smb2_notify_state *state = tevent_req_data(req,
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struct smbd_smb2_notify_state);
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if (!NT_STATUS_IS_OK(state->status)) {
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tevent_req_nterror(req, state->status);
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return;
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}
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tevent_req_done(req);
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}
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static NTSTATUS smbd_smb2_notify_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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NTSTATUS status;
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struct smbd_smb2_notify_state *state = tevent_req_data(req,
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struct smbd_smb2_notify_state);
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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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*out_output_buffer = state->out_output_buffer;
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talloc_steal(mem_ctx, out_output_buffer->data);
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tevent_req_received(req);
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return NT_STATUS_OK;
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}
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@ -752,7 +752,7 @@ static NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
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if (!NT_STATUS_IS_OK(status)) {
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return smbd_smb2_request_error(req, status);
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}
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return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
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return smbd_smb2_request_process_notify(req);
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case SMB2_OP_GETINFO:
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if (!NT_STATUS_IS_OK(session_status)) {
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