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smb2-cmd-query-info.c
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/* -*- mode:c; tab-width:8; c-basic-offset:8; indent-tabs-mode:nil; -*- */
/*
Copyright (C) 2016 by Ronnie Sahlberg <[email protected]>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef STDC_HEADERS
#include <stddef.h>
#endif
#include <errno.h>
#include "compat.h"
#include "smb2.h"
#include "libsmb2.h"
#include "libsmb2-private.h"
static int
smb2_encode_query_info_request(struct smb2_context *smb2,
struct smb2_pdu *pdu,
struct smb2_query_info_request *req)
{
int len;
uint8_t *buf;
struct smb2_iovec *iov;
if (req->input_buffer_length > 0) {
smb2_set_error(smb2, "No support for input buffers, yet");
return -1;
}
len = SMB2_QUERY_INFO_REQUEST_SIZE & 0xfffffffe;
buf = calloc(len, sizeof(uint8_t));
if (buf == NULL) {
smb2_set_error(smb2, "Failed to allocate query buffer");
return -1;
}
iov = smb2_add_iovector(smb2, &pdu->out, buf, len, free);
smb2_set_uint16(iov, 0, SMB2_QUERY_INFO_REQUEST_SIZE);
smb2_set_uint8(iov, 2, req->info_type);
smb2_set_uint8(iov, 3, req->file_info_class);
smb2_set_uint32(iov,4, req->output_buffer_length);
smb2_set_uint32(iov,12, req->input_buffer_length);
smb2_set_uint32(iov,16, req->additional_information);
smb2_set_uint32(iov,20, req->flags);
memcpy(iov->buf + 24, req->file_id, SMB2_FD_SIZE);
/* Remember what we asked for so that we can unmarshall the reply */
pdu->info_type = req->info_type;
pdu->file_info_class = req->file_info_class;
return 0;
}
struct smb2_pdu *
smb2_cmd_query_info_async(struct smb2_context *smb2,
struct smb2_query_info_request *req,
smb2_command_cb cb, void *cb_data)
{
struct smb2_pdu *pdu;
pdu = smb2_allocate_pdu(smb2, SMB2_QUERY_INFO, cb, cb_data);
if (pdu == NULL) {
return NULL;
}
if (smb2_encode_query_info_request(smb2, pdu, req)) {
smb2_free_pdu(smb2, pdu);
return NULL;
}
if (smb2_pad_to_64bit(smb2, &pdu->out) != 0) {
smb2_free_pdu(smb2, pdu);
return NULL;
}
return pdu;
}
#define IOV_OFFSET (rep->output_buffer_offset - SMB2_HEADER_SIZE - \
(SMB2_QUERY_INFO_REPLY_SIZE & 0xfffe))
int
smb2_process_query_info_fixed(struct smb2_context *smb2,
struct smb2_pdu *pdu)
{
struct smb2_query_info_reply *rep;
struct smb2_iovec *iov = &smb2->in.iov[smb2->in.niov - 1];
uint16_t struct_size;
rep = malloc(sizeof(*rep));
if (rep == NULL) {
smb2_set_error(smb2, "Failed to allocate query info reply");
return -1;
}
pdu->payload = rep;
smb2_get_uint16(iov, 0, &struct_size);
if (struct_size != SMB2_QUERY_INFO_REPLY_SIZE ||
(struct_size & 0xfffe) != iov->len) {
smb2_set_error(smb2, "Unexpected size of Query Info "
"reply. Expected %d, got %d",
SMB2_QUERY_INFO_REPLY_SIZE,
(int)iov->len);
return -1;
}
smb2_get_uint16(iov, 2, &rep->output_buffer_offset);
smb2_get_uint32(iov, 4, &rep->output_buffer_length);
if (rep->output_buffer_length == 0) {
smb2_set_error(smb2, "No output buffer in Query "
"Info response");
return -1;
}
if (rep->output_buffer_offset < SMB2_HEADER_SIZE +
(SMB2_QUERY_INFO_REPLY_SIZE & 0xfffe)) {
smb2_set_error(smb2, "Output buffer overlaps with "
"Query Info reply header");
return -1;
}
/* Return the amount of data that the output buffer will take up.
* Including any padding before the output buffer itself.
*/
return IOV_OFFSET + rep->output_buffer_length;
}
int
smb2_process_query_info_variable(struct smb2_context *smb2,
struct smb2_pdu *pdu)
{
struct smb2_query_info_reply *rep = pdu->payload;
struct smb2_iovec *iov = &smb2->in.iov[smb2->in.niov - 1];
struct smb2_iovec vec = {&iov->buf[IOV_OFFSET],
iov->len - IOV_OFFSET,
NULL};
void *ptr;
switch (pdu->info_type) {
case SMB2_0_INFO_FILE:
switch (pdu->file_info_class) {
case SMB2_FILE_BASIC_INFORMATION:
ptr = smb2_alloc_init(smb2,
sizeof(struct smb2_file_basic_info));
if (smb2_decode_file_basic_info(smb2, ptr, ptr, &vec)) {
smb2_set_error(smb2, "could not decode file "
"basic info. %s",
smb2_get_error(smb2));
return -1;
}
break;
case SMB2_FILE_STANDARD_INFORMATION:
ptr = smb2_alloc_init(smb2,
sizeof(struct smb2_file_standard_info));
if (smb2_decode_file_standard_info(smb2, ptr, ptr,
&vec)) {
smb2_set_error(smb2, "could not decode file "
"standard info. %s",
smb2_get_error(smb2));
return -1;
}
break;
case SMB2_FILE_ALL_INFORMATION:
ptr = smb2_alloc_init(smb2,
sizeof(struct smb2_file_all_info));
if (smb2_decode_file_all_info(smb2, ptr, ptr, &vec)) {
smb2_set_error(smb2, "could not decode file "
"all info. %s",
smb2_get_error(smb2));
return -1;
}
break;
default:
smb2_set_error(smb2, "Can not decode info_type/"
"info_class %d/%d yet",
pdu->info_type,
pdu->file_info_class);
return -1;
}
break;
case SMB2_0_INFO_SECURITY:
ptr = smb2_alloc_init(smb2,
sizeof(struct smb2_security_descriptor));
if (smb2_decode_security_descriptor(smb2, ptr, ptr, &vec)) {
smb2_set_error(smb2, "could not decode security "
"descriptor. %s",
smb2_get_error(smb2));
return -1;
}
break;
case SMB2_0_INFO_FILESYSTEM:
switch (pdu->file_info_class) {
case SMB2_FILE_FS_VOLUME_INFORMATION:
ptr = smb2_alloc_init(smb2,
sizeof(struct smb2_file_fs_volume_info));
if (smb2_decode_file_fs_volume_info(smb2, ptr, ptr,
&vec)) {
smb2_set_error(smb2, "could not decode file "
"fs volume info. %s",
smb2_get_error(smb2));
return -1;
}
break;
case SMB2_FILE_FS_SIZE_INFORMATION:
ptr = smb2_alloc_init(smb2,
sizeof(struct smb2_file_fs_size_info));
if (smb2_decode_file_fs_size_info(smb2, ptr, ptr,
&vec)) {
smb2_set_error(smb2, "could not decode file "
"fs size info. %s",
smb2_get_error(smb2));
return -1;
}
break;
case SMB2_FILE_FS_DEVICE_INFORMATION:
ptr = smb2_alloc_init(smb2,
sizeof(struct smb2_file_fs_device_info));
if (smb2_decode_file_fs_device_info(smb2, ptr, ptr,
&vec)) {
smb2_set_error(smb2, "could not decode file "
"fs device info. %s",
smb2_get_error(smb2));
return -1;
}
break;
case SMB2_FILE_FS_CONTROL_INFORMATION:
ptr = smb2_alloc_init(smb2,
sizeof(struct smb2_file_fs_control_info));
if (smb2_decode_file_fs_control_info(smb2, ptr, ptr,
&vec)) {
smb2_set_error(smb2, "could not decode file "
"fs control info. %s",
smb2_get_error(smb2));
return -1;
}
break;
case SMB2_FILE_FS_FULL_SIZE_INFORMATION:
ptr = smb2_alloc_init(smb2,
sizeof(struct smb2_file_fs_full_size_info));
if (smb2_decode_file_fs_full_size_info(smb2, ptr, ptr,
&vec)) {
smb2_set_error(smb2, "could not decode file "
"fs full size info. %s",
smb2_get_error(smb2));
return -1;
}
break;
case SMB2_FILE_FS_SECTOR_SIZE_INFORMATION:
ptr = smb2_alloc_init(smb2,
sizeof(struct smb2_file_fs_sector_size_info));
if (smb2_decode_file_fs_sector_size_info(smb2, ptr, ptr,
&vec)) {
smb2_set_error(smb2, "could not decode file "
"fs sector size info. %s",
smb2_get_error(smb2));
return -1;
}
break;
default:
smb2_set_error(smb2, "Can not decode info_type/"
"info_class %d/%d yet",
pdu->info_type,
pdu->file_info_class);
return -1;
}
break;
default:
smb2_set_error(smb2, "Can not decode file info_type %d yet",
pdu->info_type);
return -1;
}
rep->output_buffer = ptr;
return 0;
}