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/*
Unix SMB/CIFS implementation.
server side dcerpc handle code
Copyright (C) Andrew Tridgell 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 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 "../lib/util/dlinklist.h"
#include "rpc_server/dcerpc_server.h"
#include "libcli/security/dom_sid.h"
#include "auth/session.h"
/*
destroy a rpc handle
*/
static int dcesrv_handle_destructor(struct dcesrv_handle *h)
{
DLIST_REMOVE(h->assoc_group->handles, h);
return 0;
}
/*
allocate a new rpc handle
*/
_PUBLIC_ struct dcesrv_handle *dcesrv_handle_new(struct dcesrv_connection_context *context,
uint8_t handle_type)
{
struct dcesrv_handle *h;
struct dom_sid *sid;
sid = context->conn->auth_state.session_info->security_token->user_sid;
h = talloc(context->assoc_group, struct dcesrv_handle);
if (!h) {
return NULL;
}
h->data = NULL;
h->sid = dom_sid_dup(h, sid);
if (h->sid == NULL) {
talloc_free(h);
return NULL;
}
h->assoc_group = context->assoc_group;
h->iface = context->iface;
h->wire_handle.handle_type = handle_type;
h->wire_handle.uuid = GUID_random();
DLIST_ADD(context->assoc_group->handles, h);
talloc_set_destructor(h, dcesrv_handle_destructor);
return h;
}
/**
find an internal handle given a wire handle. If the wire handle is NULL then
allocate a new handle
*/
_PUBLIC_ struct dcesrv_handle *dcesrv_handle_fetch(
struct dcesrv_connection_context *context,
struct policy_handle *p,
uint8_t handle_type)
{
struct dcesrv_handle *h;
struct dom_sid *sid;
sid = context->conn->auth_state.session_info->security_token->user_sid;
if (policy_handle_empty(p)) {
/* TODO: we should probably return a NULL handle here */
return dcesrv_handle_new(context, handle_type);
}
for (h=context->assoc_group->handles; h; h=h->next) {
if (h->wire_handle.handle_type == p->handle_type &&
GUID_equal(&p->uuid, &h->wire_handle.uuid)) {
if (handle_type != DCESRV_HANDLE_ANY &&
p->handle_type != handle_type) {
DEBUG(0,("client gave us the wrong handle type (%d should be %d)\n",
p->handle_type, handle_type));
return NULL;
}
if (!dom_sid_equal(h->sid, sid)) {
DEBUG(0,(__location__ ": Attempt to use invalid sid %s - %s\n",
dom_sid_string(context, h->sid),
dom_sid_string(context, sid)));
return NULL;
}
if (h->iface != context->iface) {
DEBUG(0,(__location__ ": Attempt to use invalid iface\n"));
return NULL;
}
return h;
}
}
return NULL;
}
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