2 * Unix SMB/CIFS implementation.
3 * Util functions valid in the SMB1 server
5 * Copyright (C) Volker Lendecke 2019
6 * Copyright by the authors of the functions moved here eventually
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "smb1_utils.h"
24 #include "libcli/security/security.h"
25 #include "lib/util/sys_rw_data.h"
26 #include "smbd/fd_handle.h"
28 /****************************************************************************
29 Special FCB or DOS processing in the case of a sharing violation.
30 Try and find a duplicated file handle.
31 ****************************************************************************/
33 struct files_struct
*fcb_or_dos_open(
34 struct smb_request
*req
,
35 const struct smb_filename
*smb_fname
,
37 uint32_t create_options
,
38 uint32_t private_flags
)
40 struct connection_struct
*conn
= req
->conn
;
41 struct file_id id
= vfs_file_id_from_sbuf(conn
, &smb_fname
->st
);
42 struct files_struct
*fsp
= NULL
, *new_fsp
= NULL
;
46 (NTCREATEX_FLAG_DENY_DOS
|
47 NTCREATEX_FLAG_DENY_FCB
))
52 for(fsp
= file_find_di_first(conn
->sconn
, id
, true);
54 fsp
= file_find_di_next(fsp
, true)) {
56 DBG_DEBUG("Checking file %s, fd = %d, vuid = %"PRIu64
", "
57 "file_pid = %"PRIu16
", "
58 "private_options = 0x%"PRIx32
", "
59 "access_mask = 0x%"PRIx32
"\n",
61 fsp_get_pathref_fd(fsp
),
64 fh_get_private_options(fsp
->fh
),
67 if (fsp_get_pathref_fd(fsp
) != -1 &&
68 fsp
->vuid
== req
->vuid
&&
69 fsp
->file_pid
== req
->smbpid
&&
70 (fh_get_private_options(fsp
->fh
) &
71 (NTCREATEX_FLAG_DENY_DOS
|
72 NTCREATEX_FLAG_DENY_FCB
)) &&
73 (fsp
->access_mask
& FILE_WRITE_DATA
) &&
74 strequal(fsp
->fsp_name
->base_name
, smb_fname
->base_name
) &&
75 strequal(fsp
->fsp_name
->stream_name
,
76 smb_fname
->stream_name
)) {
77 DBG_DEBUG("file match\n");
86 /* quite an insane set of semantics ... */
87 if (is_executable(smb_fname
->base_name
) &&
88 (fh_get_private_options(fsp
->fh
) & NTCREATEX_FLAG_DENY_DOS
)) {
89 DBG_DEBUG("file fail due to is_executable.\n");
93 status
= file_new(req
, conn
, &new_fsp
);
94 if (!NT_STATUS_IS_OK(status
)) {
95 DBG_DEBUG("file_new failed: %s\n", nt_errstr(status
));
99 status
= dup_file_fsp(
106 if (!NT_STATUS_IS_OK(status
)) {
107 DBG_DEBUG("dup_file_fsp failed: %s\n", nt_errstr(status
));
108 file_free(req
, new_fsp
);
115 /****************************************************************************
116 Send a keepalive packet (rfc1002).
117 ****************************************************************************/
119 bool send_keepalive(int client
)
121 unsigned char buf
[4];
123 buf
[0] = NBSSkeepalive
;
124 buf
[1] = buf
[2] = buf
[3] = 0;
126 return(write_data(client
,(char *)buf
,4) == 4);