wmi-1.3.16 from opsview.com
This commit is contained in:
Are Casilla
@@ -0,0 +1,482 @@
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/*
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Unix SMB/CIFS implementation.
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dcerpc over SMB2 transport
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Copyright (C) Andrew Tridgell 2005
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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 2 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, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "libcli/raw/libcliraw.h"
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#include "libcli/composite/composite.h"
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#include "libcli/smb2/smb2.h"
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#include "libcli/smb2/smb2_calls.h"
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#include "libcli/raw/ioctl.h"
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#include "librpc/rpc/dcerpc.h"
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/* transport private information used by SMB2 pipe transport */
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struct smb2_private {
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struct smb2_handle handle;
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struct smb2_tree *tree;
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const char *server_name;
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};
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/*
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tell the dcerpc layer that the transport is dead
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*/
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static void pipe_dead(struct dcerpc_connection *c, NTSTATUS status)
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{
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c->transport.recv_data(c, NULL, status);
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}
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/*
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this holds the state of an in-flight call
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*/
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struct smb2_read_state {
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struct dcerpc_connection *c;
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DATA_BLOB data;
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};
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/*
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called when a read request has completed
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*/
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static void smb2_read_callback(struct smb2_request *req)
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{
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struct smb2_private *smb;
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struct smb2_read_state *state;
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struct smb2_read io;
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uint16_t frag_length;
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NTSTATUS status;
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state = talloc_get_type(req->async.private, struct smb2_read_state);
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smb = talloc_get_type(state->c->transport.private, struct smb2_private);
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status = smb2_read_recv(req, state, &io);
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if (NT_STATUS_IS_ERR(status)) {
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pipe_dead(state->c, status);
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talloc_free(state);
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return;
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}
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status = data_blob_append(state, &state->data,
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io.out.data.data, io.out.data.length);
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if (NT_STATUS_IS_ERR(status)) {
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pipe_dead(state->c, status);
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talloc_free(state);
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return;
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}
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if (state->data.length < 16) {
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DEBUG(0,("dcerpc_smb2: short packet (length %d) in read callback!\n",
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(int)state->data.length));
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pipe_dead(state->c, NT_STATUS_INFO_LENGTH_MISMATCH);
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talloc_free(state);
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return;
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}
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frag_length = dcerpc_get_frag_length(&state->data);
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if (frag_length <= state->data.length) {
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DATA_BLOB data = state->data;
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struct dcerpc_connection *c = state->c;
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talloc_steal(c, data.data);
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talloc_free(state);
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c->transport.recv_data(c, &data, NT_STATUS_OK);
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return;
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}
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/* initiate another read request, as we only got part of a fragment */
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ZERO_STRUCT(io);
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io.in.file.handle = smb->handle;
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io.in.length = MIN(state->c->srv_max_xmit_frag,
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frag_length - state->data.length);
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if (io.in.length < 16) {
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io.in.length = 16;
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}
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req = smb2_read_send(smb->tree, &io);
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if (req == NULL) {
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pipe_dead(state->c, NT_STATUS_NO_MEMORY);
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talloc_free(state);
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return;
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}
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req->async.fn = smb2_read_callback;
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req->async.private = state;
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}
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/*
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trigger a read request from the server, possibly with some initial
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data in the read buffer
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*/
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static NTSTATUS send_read_request_continue(struct dcerpc_connection *c, DATA_BLOB *blob)
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{
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struct smb2_private *smb = c->transport.private;
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struct smb2_read io;
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struct smb2_read_state *state;
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struct smb2_request *req;
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state = talloc(smb, struct smb2_read_state);
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if (state == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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state->c = c;
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if (blob == NULL) {
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state->data = data_blob(NULL, 0);
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} else {
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state->data = *blob;
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talloc_steal(state, state->data.data);
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}
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ZERO_STRUCT(io);
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io.in.file.handle = smb->handle;
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if (state->data.length >= 16) {
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uint16_t frag_length = dcerpc_get_frag_length(&state->data);
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io.in.length = frag_length - state->data.length;
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} else {
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io.in.length = 0x2000;
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}
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req = smb2_read_send(smb->tree, &io);
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if (req == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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req->async.fn = smb2_read_callback;
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req->async.private = state;
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return NT_STATUS_OK;
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}
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/*
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trigger a read request from the server
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*/
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static NTSTATUS send_read_request(struct dcerpc_connection *c)
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{
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return send_read_request_continue(c, NULL);
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}
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/*
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this holds the state of an in-flight trans call
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*/
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struct smb2_trans_state {
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struct dcerpc_connection *c;
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};
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/*
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called when a trans request has completed
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*/
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static void smb2_trans_callback(struct smb2_request *req)
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{
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struct smb2_trans_state *state = talloc_get_type(req->async.private,
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struct smb2_trans_state);
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struct dcerpc_connection *c = state->c;
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NTSTATUS status;
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struct smb2_ioctl io;
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status = smb2_ioctl_recv(req, state, &io);
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if (NT_STATUS_IS_ERR(status)) {
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pipe_dead(c, status);
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return;
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}
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if (!NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
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DATA_BLOB data = io.out.out;
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talloc_steal(c, data.data);
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talloc_free(state);
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c->transport.recv_data(c, &data, NT_STATUS_OK);
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return;
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}
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/* there is more to receive - setup a read */
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send_read_request_continue(c, &io.out.out);
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talloc_free(state);
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}
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/*
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send a SMBtrans style request, using a named pipe read_write fsctl
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*/
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static NTSTATUS smb2_send_trans_request(struct dcerpc_connection *c, DATA_BLOB *blob)
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{
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struct smb2_private *smb = talloc_get_type(c->transport.private,
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struct smb2_private);
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struct smb2_ioctl io;
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struct smb2_trans_state *state;
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struct smb2_request *req;
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state = talloc(smb, struct smb2_trans_state);
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if (state == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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state->c = c;
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ZERO_STRUCT(io);
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io.in.file.handle = smb->handle;
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io.in.function = FSCTL_NAMED_PIPE_READ_WRITE;
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io.in.max_response_size = 0x1000;
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io.in.flags = 1;
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io.in.out = *blob;
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req = smb2_ioctl_send(smb->tree, &io);
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if (req == NULL) {
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talloc_free(state);
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return NT_STATUS_NO_MEMORY;
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}
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req->async.fn = smb2_trans_callback;
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req->async.private = state;
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talloc_steal(state, req);
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return NT_STATUS_OK;
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}
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/*
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called when a write request has completed
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*/
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static void smb2_write_callback(struct smb2_request *req)
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{
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struct dcerpc_connection *c = req->async.private;
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if (!NT_STATUS_IS_OK(req->status)) {
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DEBUG(0,("dcerpc_smb2: write callback error\n"));
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pipe_dead(c, req->status);
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}
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smb2_request_destroy(req);
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}
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/*
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send a packet to the server
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*/
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static NTSTATUS smb2_send_request(struct dcerpc_connection *c, DATA_BLOB *blob,
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BOOL trigger_read)
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{
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struct smb2_private *smb = c->transport.private;
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struct smb2_write io;
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struct smb2_request *req;
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if (trigger_read) {
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return smb2_send_trans_request(c, blob);
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}
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ZERO_STRUCT(io);
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io.in.file.handle = smb->handle;
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io.in.data = *blob;
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req = smb2_write_send(smb->tree, &io);
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if (req == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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req->async.fn = smb2_write_callback;
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req->async.private = c;
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return NT_STATUS_OK;
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}
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/*
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shutdown SMB pipe connection
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*/
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static NTSTATUS smb2_shutdown_pipe(struct dcerpc_connection *c)
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{
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struct smb2_private *smb = c->transport.private;
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struct smb2_close io;
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struct smb2_request *req;
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/* maybe we're still starting up */
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if (!smb) return NT_STATUS_OK;
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ZERO_STRUCT(io);
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io.in.file.handle = smb->handle;
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req = smb2_close_send(smb->tree, &io);
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if (req != NULL) {
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/* we don't care if this fails, so just free it if it succeeds */
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req->async.fn = (void (*)(struct smb2_request *))talloc_free;
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}
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talloc_free(smb);
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return NT_STATUS_OK;
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}
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/*
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return SMB server name
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*/
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static const char *smb2_peer_name(struct dcerpc_connection *c)
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{
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struct smb2_private *smb = talloc_get_type(c->transport.private,
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struct smb2_private);
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return smb->server_name;
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}
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/*
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return remote name we make the actual connection (good for kerberos)
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*/
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static const char *smb2_target_hostname(struct dcerpc_connection *c)
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{
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struct smb2_private *smb = talloc_get_type(c->transport.private,
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struct smb2_private);
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return smb->tree->session->transport->socket->hostname;
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}
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/*
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fetch the user session key
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*/
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static NTSTATUS smb2_session_key(struct dcerpc_connection *c, DATA_BLOB *session_key)
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{
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struct smb2_private *smb = talloc_get_type(c->transport.private,
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struct smb2_private);
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*session_key = smb->tree->session->session_key;
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if (session_key->data == NULL) {
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return NT_STATUS_NO_USER_SESSION_KEY;
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}
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return NT_STATUS_OK;
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}
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struct pipe_open_smb2_state {
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struct dcerpc_connection *c;
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struct composite_context *ctx;
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};
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static void pipe_open_recv(struct smb2_request *req);
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struct composite_context *dcerpc_pipe_open_smb2_send(struct dcerpc_connection *c,
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struct smb2_tree *tree,
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const char *pipe_name)
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{
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struct composite_context *ctx;
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struct pipe_open_smb2_state *state;
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struct smb2_create io;
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struct smb2_request *req;
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ctx = composite_create(c, c->event_ctx);
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if (ctx == NULL) return NULL;
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state = talloc(ctx, struct pipe_open_smb2_state);
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if (composite_nomem(state, ctx)) return ctx;
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ctx->private_data = state;
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state->c = c;
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state->ctx = ctx;
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ZERO_STRUCT(io);
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io.in.access_mask =
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SEC_STD_READ_CONTROL |
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SEC_FILE_READ_ATTRIBUTE |
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SEC_FILE_WRITE_ATTRIBUTE |
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SEC_STD_SYNCHRONIZE |
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SEC_FILE_READ_EA |
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SEC_FILE_WRITE_EA |
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SEC_FILE_READ_DATA |
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SEC_FILE_WRITE_DATA |
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SEC_FILE_APPEND_DATA;
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io.in.share_access =
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NTCREATEX_SHARE_ACCESS_READ |
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NTCREATEX_SHARE_ACCESS_WRITE;
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io.in.open_disposition = NTCREATEX_DISP_OPEN;
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io.in.create_options =
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NTCREATEX_OPTIONS_NON_DIRECTORY_FILE |
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NTCREATEX_OPTIONS_UNKNOWN_400000;
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io.in.impersonation = NTCREATEX_IMPERSONATION_IMPERSONATION;
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if ((strncasecmp(pipe_name, "/pipe/", 6) == 0) ||
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(strncasecmp(pipe_name, "\\pipe\\", 6) == 0)) {
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pipe_name += 6;
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}
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io.in.fname = pipe_name;
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req = smb2_create_send(tree, &io);
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composite_continue_smb2(ctx, req, pipe_open_recv, state);
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return ctx;
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}
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static void pipe_open_recv(struct smb2_request *req)
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{
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struct pipe_open_smb2_state *state =
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talloc_get_type(req->async.private,
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struct pipe_open_smb2_state);
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struct composite_context *ctx = state->ctx;
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struct dcerpc_connection *c = state->c;
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struct smb2_tree *tree = req->tree;
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struct smb2_private *smb;
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struct smb2_create io;
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ctx->status = smb2_create_recv(req, state, &io);
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if (!composite_is_ok(ctx)) return;
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/*
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fill in the transport methods
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*/
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c->transport.transport = NCACN_NP;
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c->transport.private = NULL;
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c->transport.shutdown_pipe = smb2_shutdown_pipe;
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c->transport.peer_name = smb2_peer_name;
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c->transport.target_hostname = smb2_target_hostname;
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c->transport.send_request = smb2_send_request;
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c->transport.send_read = send_read_request;
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c->transport.recv_data = NULL;
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/* Over-ride the default session key with the SMB session key */
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c->security_state.session_key = smb2_session_key;
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smb = talloc(c, struct smb2_private);
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if (composite_nomem(smb, ctx)) return;
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smb->handle = io.out.file.handle;
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smb->tree = talloc_reference(smb, tree);
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smb->server_name= strupper_talloc(smb,
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tree->session->transport->socket->hostname);
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if (composite_nomem(smb->server_name, ctx)) return;
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c->transport.private = smb;
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composite_done(ctx);
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}
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NTSTATUS dcerpc_pipe_open_smb2_recv(struct composite_context *c)
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{
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NTSTATUS status = composite_wait(c);
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talloc_free(c);
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return status;
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}
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NTSTATUS dcerpc_pipe_open_smb2(struct dcerpc_connection *c,
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struct smb2_tree *tree,
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const char *pipe_name)
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{
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struct composite_context *ctx = dcerpc_pipe_open_smb2_send(c, tree, pipe_name);
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return dcerpc_pipe_open_smb2_recv(ctx);
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}
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/*
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return the SMB2 tree used for a dcerpc over SMB2 pipe
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*/
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struct smb2_tree *dcerpc_smb2_tree(struct dcerpc_connection *c)
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{
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struct smb2_private *smb = talloc_get_type(c->transport.private,
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struct smb2_private);
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return smb->tree;
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}
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