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/*
Unix SMB/CIFS implementation.
service (connection) handling
Copyright (C) Andrew Tridgell 1992-2003
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "smb_server/smb_server.h"
#include "smbd/service_stream.h"
/**
* Find a service entry. service is always in dos codepage.
*
* @param service is modified (to canonical form??)
**/
static int find_service(const char *service)
{
int iService;
iService = lp_servicenumber(service);
if (iService >= 0 && !lp_snum_ok(iService)) {
DEBUG(0,("Invalid snum %d for %s\n",iService, service));
iService = -1;
}
if (iService == -1) {
DEBUG(3,("find_service() failed to find service %s\n", service));
}
return iService;
}
/****************************************************************************
Make a connection, given the snum to connect to, and the vuser of the
connecting user if appropriate.
****************************************************************************/
static NTSTATUS make_connection_snum(struct smbsrv_request *req,
int snum, enum ntvfs_type type,
DATA_BLOB password,
const char *dev)
{
struct smbsrv_tcon *tcon;
NTSTATUS status;
if (!socket_check_access(req->smb_conn->connection->socket,
lp_servicename(snum),
lp_hostsallow(snum),
lp_hostsdeny(snum))) {
return NT_STATUS_ACCESS_DENIED;
}
tcon = smbsrv_tcon_new(req->smb_conn);
if (!tcon) {
DEBUG(0,("Couldn't find free connection.\n"));
return NT_STATUS_INSUFFICIENT_RESOURCES;
}
req->tcon = tcon;
tcon->service = snum;
/* init ntvfs function pointers */
status = ntvfs_init_connection(req, type);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("ntvfs_init_connection failed for service %s\n",
lp_servicename(tcon->service)));
req->tcon = NULL;
talloc_free(tcon);
return status;
}
/* Invoke NTVFS connection hook */
status = ntvfs_connect(req, lp_servicename(snum));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("make_connection: NTVFS make connection failed!\n"));
req->tcon = NULL;
talloc_free(tcon);
return status;
}
return NT_STATUS_OK;
}
/****************************************************************************
Make a connection to a service.
*
* @param service
****************************************************************************/
static NTSTATUS make_connection(struct smbsrv_request *req,
const char *service, DATA_BLOB password,
const char *dev)
{
int snum;
enum ntvfs_type type;
const char *type_str;
/* TODO: check the password, when it's share level security! */
/* the service might be of the form \\SERVER\SHARE. Should we put
the server name we get from this somewhere? */
if (strncmp(service, "\\\\", 2) == 0) {
char *p = strchr(service+2, '\\');
if (p) {
service = p + 1;
}
}
snum = find_service(service);
if (snum == -1) {
DEBUG(0,("couldn't find service %s\n", service));
return NT_STATUS_BAD_NETWORK_NAME;
}
/* work out what sort of connection this is */
if (strcmp(lp_fstype(snum), "IPC") == 0) {
type = NTVFS_IPC;
type_str = "IPC";
} else if (lp_print_ok(snum)) {
type = NTVFS_PRINT;
type_str = "LPT:";
} else {
type = NTVFS_DISK;
type_str = "A:";
}
if (strcmp(dev, "?????") != 0 && strcasecmp(type_str, dev) != 0) {
/* the client gave us the wrong device type */
return NT_STATUS_BAD_DEVICE_TYPE;
}
return make_connection_snum(req, snum, type, password, dev);
}
/*
backend for tree connect call
*/
NTSTATUS tcon_backend(struct smbsrv_request *req, union smb_tcon *con)
{
NTSTATUS status;
/* can only do bare tcon in share level security */
if (!req->session && lp_security() != SEC_SHARE) {
return NT_STATUS_ACCESS_DENIED;
}
if (con->generic.level == RAW_TCON_TCON) {
DATA_BLOB password;
password = data_blob(con->tcon.in.password, strlen(con->tcon.in.password) + 1);
status = make_connection(req, con->tcon.in.service, password, con->tcon.in.dev);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
con->tcon.out.max_xmit = req->smb_conn->negotiate.max_recv;
con->tcon.out.tid = req->tcon->tid;
return status;
}
status = make_connection(req, con->tconx.in.path, con->tconx.in.password,
con->tconx.in.device);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
con->tconx.out.tid = req->tcon->tid;
con->tconx.out.dev_type = talloc_strdup(req, req->tcon->dev_type);
con->tconx.out.fs_type = talloc_strdup(req, req->tcon->fs_type);
con->tconx.out.options = SMB_SUPPORT_SEARCH_BITS | (lp_csc_policy(req->tcon->service) << 2);
if (lp_msdfs_root(req->tcon->service) && lp_host_msdfs()) {
con->tconx.out.options |= SMB_SHARE_IN_DFS;
}
return status;
}
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