diff options
Diffstat (limited to 'libcli/smb/smb2cli_query_info.c')
| -rw-r--r-- | libcli/smb/smb2cli_query_info.c | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/libcli/smb/smb2cli_query_info.c b/libcli/smb/smb2cli_query_info.c new file mode 100644 index 0000000..d499611 --- /dev/null +++ b/libcli/smb/smb2cli_query_info.c @@ -0,0 +1,266 @@ +/* + Unix SMB/CIFS implementation. + smb2 lib + Copyright (C) Stefan Metzmacher 2012 + + 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 "system/network.h" +#include "lib/util/tevent_ntstatus.h" +#include "smb_common.h" +#include "smbXcli_base.h" + +struct smb2cli_query_info_state { + uint8_t fixed[0x28]; + uint8_t dyn_pad[1]; + uint32_t max_output_length; + struct iovec *recv_iov; + DATA_BLOB out_output_buffer; + bool out_valid; +}; + +static void smb2cli_query_info_done(struct tevent_req *subreq); + +struct tevent_req *smb2cli_query_info_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct smbXcli_conn *conn, + uint32_t timeout_msec, + struct smbXcli_session *session, + struct smbXcli_tcon *tcon, + uint8_t in_info_type, + uint8_t in_file_info_class, + uint32_t in_max_output_length, + const DATA_BLOB *in_input_buffer, + uint32_t in_additional_info, + uint32_t in_flags, + uint64_t in_fid_persistent, + uint64_t in_fid_volatile) +{ + struct tevent_req *req, *subreq; + struct smb2cli_query_info_state *state; + uint8_t *fixed; + uint8_t *dyn; + size_t dyn_len; + uint16_t input_buffer_offset = 0; + uint32_t input_buffer_length = 0; + + req = tevent_req_create(mem_ctx, &state, + struct smb2cli_query_info_state); + if (req == NULL) { + return NULL; + } + state->max_output_length = in_max_output_length; + + if (in_input_buffer) { + input_buffer_offset = SMB2_HDR_BODY+0x28; + input_buffer_length = in_input_buffer->length; + } + + fixed = state->fixed; + + SSVAL(fixed, 0x00, 0x29); + SCVAL(fixed, 0x02, in_info_type); + SCVAL(fixed, 0x03, in_file_info_class); /* reserved */ + SIVAL(fixed, 0x04, in_max_output_length); + SSVAL(fixed, 0x08, input_buffer_offset); + SSVAL(fixed, 0x0A, 0); /* reserved */ + SIVAL(fixed, 0x0C, input_buffer_length); + SIVAL(fixed, 0x10, in_additional_info); + SIVAL(fixed, 0x14, in_flags); + SBVAL(fixed, 0x18, in_fid_persistent); + SBVAL(fixed, 0x20, in_fid_volatile); + + if (input_buffer_length > 0) { + dyn = in_input_buffer->data; + dyn_len = in_input_buffer->length; + } else { + dyn = state->dyn_pad; + dyn_len = sizeof(state->dyn_pad); + } + + subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_GETINFO, + 0, 0, /* flags */ + timeout_msec, + tcon, + session, + state->fixed, sizeof(state->fixed), + dyn, dyn_len, + in_max_output_length); /* max_dyn_len */ + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, smb2cli_query_info_done, req); + return req; +} + +static void smb2cli_query_info_done(struct tevent_req *subreq) +{ + struct tevent_req *req = + tevent_req_callback_data(subreq, + struct tevent_req); + struct smb2cli_query_info_state *state = + tevent_req_data(req, + struct smb2cli_query_info_state); + NTSTATUS status; + struct iovec *iov; + uint8_t *fixed; + uint8_t *dyn; + size_t dyn_len; + uint32_t dyn_ofs = SMB2_HDR_BODY + 0x08; + uint32_t output_buffer_offset; + uint32_t output_buffer_length; + static const struct smb2cli_req_expected_response expected[] = { + { + .status = NT_STATUS_OK, + .body_size = 0x09 + }, + { + .status = STATUS_BUFFER_OVERFLOW, + .body_size = 0x09 + } + }; + + status = smb2cli_req_recv(subreq, state, &iov, + expected, ARRAY_SIZE(expected)); + TALLOC_FREE(subreq); + if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) { + /* no error */ + } else { + if (tevent_req_nterror(req, status)) { + return; + } + } + + state->recv_iov = iov; + fixed = (uint8_t *)iov[1].iov_base; + dyn = (uint8_t *)iov[2].iov_base; + dyn_len = iov[2].iov_len; + + output_buffer_offset = SVAL(fixed, 0x02); + output_buffer_length = IVAL(fixed, 0x04); + + if ((output_buffer_offset > 0) && (output_buffer_length > 0)) { + if (output_buffer_offset != dyn_ofs) { + tevent_req_nterror( + req, NT_STATUS_INVALID_NETWORK_RESPONSE); + return; + } + + if (output_buffer_length > dyn_len) { + tevent_req_nterror( + req, NT_STATUS_INVALID_NETWORK_RESPONSE); + return; + } + + if (output_buffer_length > state->max_output_length) { + tevent_req_nterror( + req, NT_STATUS_INVALID_NETWORK_RESPONSE); + return; + } + + state->out_output_buffer.data = dyn; + state->out_output_buffer.length = output_buffer_length; + } + + state->out_valid = true; + + if (tevent_req_nterror(req, status)) { + return; + } + + tevent_req_done(req); +} + +NTSTATUS smb2cli_query_info_recv(struct tevent_req *req, + TALLOC_CTX *mem_ctx, + DATA_BLOB *out_output_buffer) +{ + struct smb2cli_query_info_state *state = + tevent_req_data(req, + struct smb2cli_query_info_state); + NTSTATUS status = NT_STATUS_OK; + + if (tevent_req_is_nterror(req, &status) && !state->out_valid) { + if (out_output_buffer) { + *out_output_buffer = data_blob_null; + } + tevent_req_received(req); + return status; + } + + talloc_steal(mem_ctx, state->recv_iov); + if (out_output_buffer) { + *out_output_buffer = state->out_output_buffer; + } + + tevent_req_received(req); + return status; +} + +NTSTATUS smb2cli_query_info(struct smbXcli_conn *conn, + uint32_t timeout_msec, + struct smbXcli_session *session, + struct smbXcli_tcon *tcon, + uint8_t in_info_type, + uint8_t in_file_info_class, + uint32_t in_max_output_length, + const DATA_BLOB *in_input_buffer, + uint32_t in_additional_info, + uint32_t in_flags, + uint64_t in_fid_persistent, + uint64_t in_fid_volatile, + TALLOC_CTX *mem_ctx, + DATA_BLOB *out_output_buffer) +{ + TALLOC_CTX *frame = talloc_stackframe(); + struct tevent_context *ev; + struct tevent_req *req; + NTSTATUS status = NT_STATUS_NO_MEMORY; + + if (smbXcli_conn_has_async_calls(conn)) { + /* + * Can't use sync call while an async call is in flight + */ + status = NT_STATUS_INVALID_PARAMETER_MIX; + goto fail; + } + ev = samba_tevent_context_init(frame); + if (ev == NULL) { + goto fail; + } + req = smb2cli_query_info_send(frame, ev, + conn, timeout_msec, + session, tcon, + in_info_type, + in_file_info_class, + in_max_output_length, + in_input_buffer, + in_additional_info, + in_flags, + in_fid_persistent, + in_fid_volatile); + if (req == NULL) { + goto fail; + } + if (!tevent_req_poll_ntstatus(req, ev, &status)) { + goto fail; + } + status = smb2cli_query_info_recv(req, mem_ctx, + out_output_buffer); + fail: + TALLOC_FREE(frame); + return status; +} |