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927c297bd6
All callers except rename_open_files() can ignore non FSA fsps. Signed-off-by: Ralph Boehme <slow@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* Util functions valid in the SMB1 server
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*
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* Copyright (C) Volker Lendecke 2019
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* Copyright by the authors of the functions moved here eventually
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*
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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 3 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "smb1_utils.h"
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#include "libcli/security/security.h"
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#include "lib/util/sys_rw_data.h"
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#include "smbd/fd_handle.h"
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/****************************************************************************
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Special FCB or DOS processing in the case of a sharing violation.
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Try and find a duplicated file handle.
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****************************************************************************/
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struct files_struct *fcb_or_dos_open(
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struct smb_request *req,
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const struct smb_filename *smb_fname,
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uint32_t access_mask,
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uint32_t create_options,
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uint32_t private_flags)
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{
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struct connection_struct *conn = req->conn;
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struct file_id id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
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struct files_struct *fsp = NULL, *new_fsp = NULL;
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NTSTATUS status;
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if ((private_flags &
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(NTCREATEX_FLAG_DENY_DOS|
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NTCREATEX_FLAG_DENY_FCB))
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== 0) {
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return NULL;
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}
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for(fsp = file_find_di_first(conn->sconn, id, true);
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fsp != NULL;
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fsp = file_find_di_next(fsp, true)) {
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DBG_DEBUG("Checking file %s, fd = %d, vuid = %"PRIu64", "
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"file_pid = %"PRIu16", "
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"private_options = 0x%"PRIx32", "
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"access_mask = 0x%"PRIx32"\n",
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fsp_str_dbg(fsp),
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fsp_get_pathref_fd(fsp),
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fsp->vuid,
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fsp->file_pid,
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fh_get_private_options(fsp->fh),
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fsp->access_mask);
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if (fsp_get_pathref_fd(fsp) != -1 &&
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fsp->vuid == req->vuid &&
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fsp->file_pid == req->smbpid &&
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(fh_get_private_options(fsp->fh) &
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(NTCREATEX_FLAG_DENY_DOS |
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NTCREATEX_FLAG_DENY_FCB)) &&
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(fsp->access_mask & FILE_WRITE_DATA) &&
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strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
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strequal(fsp->fsp_name->stream_name,
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smb_fname->stream_name)) {
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DBG_DEBUG("file match\n");
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break;
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}
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}
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if (fsp == NULL) {
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return NULL;
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}
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/* quite an insane set of semantics ... */
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if (is_executable(smb_fname->base_name) &&
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(fh_get_private_options(fsp->fh) & NTCREATEX_FLAG_DENY_DOS)) {
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DBG_DEBUG("file fail due to is_executable.\n");
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return NULL;
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}
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status = file_new(req, conn, &new_fsp);
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if (!NT_STATUS_IS_OK(status)) {
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DBG_DEBUG("file_new failed: %s\n", nt_errstr(status));
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return NULL;
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}
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status = dup_file_fsp(
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req,
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fsp,
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access_mask,
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create_options,
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new_fsp);
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if (!NT_STATUS_IS_OK(status)) {
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DBG_DEBUG("dup_file_fsp failed: %s\n", nt_errstr(status));
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file_free(req, new_fsp);
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return NULL;
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}
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return new_fsp;
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}
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/****************************************************************************
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Send a keepalive packet (rfc1002).
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****************************************************************************/
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bool send_keepalive(int client)
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{
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unsigned char buf[4];
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buf[0] = NBSSkeepalive;
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buf[1] = buf[2] = buf[3] = 0;
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return(write_data(client,(char *)buf,4) == 4);
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}
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