diff options
| -rw-r--r-- | source3/Makefile.in | 1 | ||||
| -rw-r--r-- | source3/smbd/globals.h | 1 | ||||
| -rw-r--r-- | source3/smbd/smb2_notify.c | 375 | ||||
| -rw-r--r-- | source3/smbd/smb2_server.c | 2 |
4 files changed, 378 insertions, 1 deletions
diff --git a/source3/Makefile.in b/source3/Makefile.in index 528fb11c8d..11fd285b10 100644 --- a/source3/Makefile.in +++ b/source3/Makefile.in @@ -774,6 +774,7 @@ SMBD_OBJ_SRV = smbd/files.o smbd/chgpasswd.o smbd/connection.o \ smbd/smb2_write.o \ smbd/smb2_ioctl.o \ smbd/smb2_keepalive.o \ + smbd/smb2_notify.o \ $(MANGLE_OBJ) @VFS_STATIC@ SMBD_OBJ_BASE = $(PARAM_WITHOUT_REG_OBJ) $(SMBD_OBJ_SRV) $(LIBSMB_OBJ) \ diff --git a/source3/smbd/globals.h b/source3/smbd/globals.h index e1a95ced60..75f553d16f 100644 --- a/source3/smbd/globals.h +++ b/source3/smbd/globals.h @@ -217,6 +217,7 @@ NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req); NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req); +NTSTATUS smbd_smb2_request_process_notify(struct smbd_smb2_request *req); struct smbd_smb2_request { struct smbd_smb2_request *prev, *next; diff --git a/source3/smbd/smb2_notify.c b/source3/smbd/smb2_notify.c new file mode 100644 index 0000000000..7ab93ce574 --- /dev/null +++ b/source3/smbd/smb2_notify.c @@ -0,0 +1,375 @@ +/* + 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; +} diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c index 6c66098895..4c416b877e 100644 --- a/source3/smbd/smb2_server.c +++ b/source3/smbd/smb2_server.c @@ -752,7 +752,7 @@ static NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req) if (!NT_STATUS_IS_OK(status)) { return smbd_smb2_request_error(req, status); } - return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED); + return smbd_smb2_request_process_notify(req); case SMB2_OP_GETINFO: if (!NT_STATUS_IS_OK(session_status)) { |