1
0
mirror of https://github.com/samba-team/samba.git synced 2024-12-23 17:34:34 +03:00
samba-mirror/source3/smbd/smb2_tcon.c
2011-07-11 21:33:29 +02:00

316 lines
8.5 KiB
C

/*
Unix SMB/CIFS implementation.
Core SMB2 server
Copyright (C) Stefan Metzmacher 2009
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 "smbd/smbd.h"
#include "smbd/globals.h"
#include "../libcli/smb/smb_common.h"
#include "../libcli/security/security.h"
#include "auth.h"
#include "lib/param/loadparm.h"
static NTSTATUS smbd_smb2_tree_connect(struct smbd_smb2_request *req,
const char *in_path,
uint8_t *out_share_type,
uint32_t *out_share_flags,
uint32_t *out_capabilities,
uint32_t *out_maximal_access,
uint32_t *out_tree_id);
NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req)
{
const uint8_t *inbody;
int i = req->current_idx;
uint8_t *outhdr;
DATA_BLOB outbody;
size_t expected_body_size = 0x09;
size_t body_size;
uint16_t in_path_offset;
uint16_t in_path_length;
DATA_BLOB in_path_buffer;
char *in_path_string;
size_t in_path_string_size;
uint8_t out_share_type = 0;
uint32_t out_share_flags = 0;
uint32_t out_capabilities = 0;
uint32_t out_maximal_access = 0;
uint32_t out_tree_id = 0;
NTSTATUS status;
bool ok;
if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
body_size = SVAL(inbody, 0x00);
if (body_size != expected_body_size) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
in_path_offset = SVAL(inbody, 0x04);
in_path_length = SVAL(inbody, 0x06);
if (in_path_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
if (in_path_length > req->in.vector[i+2].iov_len) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
in_path_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
in_path_buffer.length = in_path_length;
ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
in_path_buffer.data,
in_path_buffer.length,
&in_path_string,
&in_path_string_size);
if (!ok) {
return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
}
status = smbd_smb2_tree_connect(req, in_path_string,
&out_share_type,
&out_share_flags,
&out_capabilities,
&out_maximal_access,
&out_tree_id);
if (!NT_STATUS_IS_OK(status)) {
return smbd_smb2_request_error(req, status);
}
outhdr = (uint8_t *)req->out.vector[i].iov_base;
outbody = data_blob_talloc(req->out.vector, NULL, 0x10);
if (outbody.data == NULL) {
return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
}
SIVAL(outhdr, SMB2_HDR_TID, out_tree_id);
SSVAL(outbody.data, 0x00, 0x10); /* struct size */
SCVAL(outbody.data, 0x02,
out_share_type); /* share type */
SCVAL(outbody.data, 0x03, 0); /* reserved */
SIVAL(outbody.data, 0x04,
out_share_flags); /* share flags */
SIVAL(outbody.data, 0x08,
out_capabilities); /* capabilities */
SIVAL(outbody.data, 0x0C,
out_maximal_access); /* maximal access */
return smbd_smb2_request_done(req, outbody, NULL);
}
static int smbd_smb2_tcon_destructor(struct smbd_smb2_tcon *tcon)
{
if (tcon->session == NULL) {
return 0;
}
idr_remove(tcon->session->tcons.idtree, tcon->tid);
DLIST_REMOVE(tcon->session->tcons.list, tcon);
SMB_ASSERT(tcon->session->sconn->num_tcons_open > 0);
tcon->session->sconn->num_tcons_open--;
if (tcon->compat_conn) {
set_current_service(tcon->compat_conn, 0, true);
close_cnum(tcon->compat_conn, tcon->session->vuid);
}
tcon->compat_conn = NULL;
tcon->tid = 0;
tcon->session = NULL;
return 0;
}
static NTSTATUS smbd_smb2_tree_connect(struct smbd_smb2_request *req,
const char *in_path,
uint8_t *out_share_type,
uint32_t *out_share_flags,
uint32_t *out_capabilities,
uint32_t *out_maximal_access,
uint32_t *out_tree_id)
{
const char *share = in_path;
char *service = NULL;
int snum = -1;
struct smbd_smb2_tcon *tcon;
connection_struct *compat_conn = NULL;
user_struct *compat_vuser = req->session->compat_vuser;
int id;
NTSTATUS status;
if (strncmp(share, "\\\\", 2) == 0) {
const char *p = strchr(share+2, '\\');
if (p) {
share = p + 1;
}
}
DEBUG(10,("smbd_smb2_tree_connect: path[%s] share[%s]\n",
in_path, share));
service = talloc_strdup(talloc_tos(), share);
if(!service) {
return NT_STATUS_NO_MEMORY;
}
strlower_m(service);
/* TODO: do more things... */
if (strequal(service,HOMES_NAME)) {
if (compat_vuser->homes_snum == -1) {
DEBUG(2, ("[homes] share not available for "
"user %s because it was not found "
"or created at session setup "
"time\n",
compat_vuser->session_info->unix_name));
return NT_STATUS_BAD_NETWORK_NAME;
}
snum = compat_vuser->homes_snum;
} else if ((compat_vuser->homes_snum != -1)
&& strequal(service,
lp_servicename(compat_vuser->homes_snum))) {
snum = compat_vuser->homes_snum;
} else {
snum = find_service(talloc_tos(), service, &service);
if (!service) {
return NT_STATUS_NO_MEMORY;
}
}
if (snum < 0) {
DEBUG(3,("smbd_smb2_tree_connect: couldn't find service %s\n",
service));
return NT_STATUS_BAD_NETWORK_NAME;
}
/* create a new tcon as child of the session */
tcon = talloc_zero(req->session, struct smbd_smb2_tcon);
if (tcon == NULL) {
return NT_STATUS_NO_MEMORY;
}
id = idr_get_new_random(req->session->tcons.idtree,
tcon,
req->session->tcons.limit);
if (id == -1) {
TALLOC_FREE(tcon);
return NT_STATUS_INSUFFICIENT_RESOURCES;
}
tcon->tid = id;
tcon->snum = snum;
DLIST_ADD_END(req->session->tcons.list, tcon,
struct smbd_smb2_tcon *);
tcon->session = req->session;
tcon->session->sconn->num_tcons_open++;
talloc_set_destructor(tcon, smbd_smb2_tcon_destructor);
compat_conn = make_connection_snum(req->sconn,
snum, req->session->compat_vuser,
data_blob_null, "???",
&status);
if (compat_conn == NULL) {
TALLOC_FREE(tcon);
return status;
}
tcon->compat_conn = talloc_move(tcon, &compat_conn);
tcon->compat_conn->cnum = tcon->tid;
if (IS_PRINT(tcon->compat_conn)) {
*out_share_type = SMB2_SHARE_TYPE_PRINT;
} else if (IS_IPC(tcon->compat_conn)) {
*out_share_type = SMB2_SHARE_TYPE_PIPE;
} else {
*out_share_type = SMB2_SHARE_TYPE_DISK;
}
*out_share_flags = SMB2_SHAREFLAG_ALLOW_NAMESPACE_CACHING;
if (lp_msdfs_root(SNUM(tcon->compat_conn)) && lp_host_msdfs()) {
*out_share_flags |= (SMB2_SHAREFLAG_DFS|SMB2_SHAREFLAG_DFS_ROOT);
*out_capabilities = SMB2_SHARE_CAP_DFS;
} else {
*out_capabilities = 0;
}
switch(lp_csc_policy(SNUM(tcon->compat_conn))) {
case CSC_POLICY_MANUAL:
break;
case CSC_POLICY_DOCUMENTS:
*out_share_flags |= SMB2_SHAREFLAG_AUTO_CACHING;
break;
case CSC_POLICY_PROGRAMS:
*out_share_flags |= SMB2_SHAREFLAG_VDO_CACHING;
break;
case CSC_POLICY_DISABLE:
*out_share_flags |= SMB2_SHAREFLAG_NO_CACHING;
break;
default:
break;
}
*out_maximal_access = tcon->compat_conn->share_access;
*out_tree_id = tcon->tid;
return NT_STATUS_OK;
}
NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req)
{
const uint8_t *inbody;
int i = req->current_idx;
DATA_BLOB outbody;
size_t expected_body_size = 0x04;
size_t body_size;
if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
body_size = SVAL(inbody, 0x00);
if (body_size != expected_body_size) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
/*
* TODO: cancel all outstanding requests on the tcon
* and delete all file handles.
*/
TALLOC_FREE(req->tcon);
outbody = data_blob_talloc(req->out.vector, NULL, 0x04);
if (outbody.data == NULL) {
return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
}
SSVAL(outbody.data, 0x00, 0x04); /* struct size */
SSVAL(outbody.data, 0x02, 0); /* reserved */
return smbd_smb2_request_done(req, outbody, NULL);
}