source: vendor/3.5.9/source4/rpc_server/handles.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 3.0 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 server side dcerpc handle code
5
6 Copyright (C) Andrew Tridgell 2003
7
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.
12
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.
17
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/>.
20*/
21
22#include "includes.h"
23#include "../lib/util/dlinklist.h"
24#include "rpc_server/dcerpc_server.h"
25#include "libcli/security/dom_sid.h"
26#include "auth/session.h"
27
28/*
29 destroy a rpc handle
30*/
31static int dcesrv_handle_destructor(struct dcesrv_handle *h)
32{
33 DLIST_REMOVE(h->assoc_group->handles, h);
34 return 0;
35}
36
37
38/*
39 allocate a new rpc handle
40*/
41_PUBLIC_ struct dcesrv_handle *dcesrv_handle_new(struct dcesrv_connection_context *context,
42 uint8_t handle_type)
43{
44 struct dcesrv_handle *h;
45 struct dom_sid *sid;
46
47 sid = context->conn->auth_state.session_info->security_token->user_sid;
48
49 h = talloc(context->assoc_group, struct dcesrv_handle);
50 if (!h) {
51 return NULL;
52 }
53 h->data = NULL;
54 h->sid = dom_sid_dup(h, sid);
55 if (h->sid == NULL) {
56 talloc_free(h);
57 return NULL;
58 }
59 h->assoc_group = context->assoc_group;
60 h->iface = context->iface;
61 h->wire_handle.handle_type = handle_type;
62 h->wire_handle.uuid = GUID_random();
63
64 DLIST_ADD(context->assoc_group->handles, h);
65
66 talloc_set_destructor(h, dcesrv_handle_destructor);
67
68 return h;
69}
70
71/**
72 find an internal handle given a wire handle. If the wire handle is NULL then
73 allocate a new handle
74*/
75_PUBLIC_ struct dcesrv_handle *dcesrv_handle_fetch(
76 struct dcesrv_connection_context *context,
77 struct policy_handle *p,
78 uint8_t handle_type)
79{
80 struct dcesrv_handle *h;
81 struct dom_sid *sid;
82
83 sid = context->conn->auth_state.session_info->security_token->user_sid;
84
85 if (policy_handle_empty(p)) {
86 /* TODO: we should probably return a NULL handle here */
87 return dcesrv_handle_new(context, handle_type);
88 }
89
90 for (h=context->assoc_group->handles; h; h=h->next) {
91 if (h->wire_handle.handle_type == p->handle_type &&
92 GUID_equal(&p->uuid, &h->wire_handle.uuid)) {
93 if (handle_type != DCESRV_HANDLE_ANY &&
94 p->handle_type != handle_type) {
95 DEBUG(0,("client gave us the wrong handle type (%d should be %d)\n",
96 p->handle_type, handle_type));
97 return NULL;
98 }
99 if (!dom_sid_equal(h->sid, sid)) {
100 DEBUG(0,(__location__ ": Attempt to use invalid sid %s - %s\n",
101 dom_sid_string(context, h->sid),
102 dom_sid_string(context, sid)));
103 return NULL;
104 }
105 if (h->iface != context->iface) {
106 DEBUG(0,(__location__ ": Attempt to use invalid iface\n"));
107 return NULL;
108 }
109 return h;
110 }
111 }
112
113 return NULL;
114}
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