2
* Unix SMB/CIFS implementation.
3
* RPC Pipe client / server routines
4
* Copyright (C) Andrew Tridgell 1992-1997,
5
* Copyright (C) Luke Kenneth Casson Leighton 1996-1997,
6
* Copyright (C) Jeremy Allison 2001.
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 2 of the License, or
11
* (at your option) any later version.
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.
18
* You should have received a copy of the GNU General Public License
19
* along with this program; if not, write to the Free Software
20
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26
#define DBGC_CLASS DBGC_RPC_SRV
28
/* This is the max handles across all instances of a pipe name. */
30
#define MAX_OPEN_POLS 1024
33
/****************************************************************************
34
Hack as handles need to be persisant over lsa pipe closes so long as a samr
36
****************************************************************************/
38
static BOOL is_samr_lsa_pipe(const char *pipe_name)
40
return (strstr(pipe_name, "samr") || strstr(pipe_name, "lsa"));
43
/****************************************************************************
44
Initialise a policy handle list on a pipe. Handle list is shared between all
45
pipes of the same name.
46
****************************************************************************/
48
BOOL init_pipe_handle_list(pipes_struct *p, char *pipe_name)
50
pipes_struct *plist = get_first_internal_pipe();
51
struct handle_list *hl = NULL;
53
for (plist = get_first_internal_pipe(); plist; plist = get_next_internal_pipe(plist)) {
54
if (strequal( plist->name, pipe_name) ||
55
(is_samr_lsa_pipe(plist->name) && is_samr_lsa_pipe(pipe_name))) {
56
if (!plist->pipe_handles) {
58
slprintf(msg, sizeof(msg)-1, "init_pipe_handles: NULL pipe_handle pointer in pipe %s",
62
hl = plist->pipe_handles;
69
* No handle list for this pipe (first open of pipe).
73
if ((hl = SMB_MALLOC_P(struct handle_list)) == NULL)
77
DEBUG(10,("init_pipe_handles: created handle list for pipe %s\n", pipe_name ));
81
* One more pipe is using this list.
87
* Point this pipe at this list.
92
DEBUG(10,("init_pipe_handles: pipe_handles ref count = %lu for pipe %s\n",
93
(unsigned long)p->pipe_handles->pipe_ref_count, pipe_name ));
98
/****************************************************************************
99
find first available policy slot. creates a policy handle for you.
100
****************************************************************************/
102
BOOL create_policy_hnd(pipes_struct *p, POLICY_HND *hnd, void (*free_fn)(void *), void *data_ptr)
104
static uint32 pol_hnd_low = 0;
105
static uint32 pol_hnd_high = 0;
109
if (p->pipe_handles->count > MAX_OPEN_POLS) {
110
DEBUG(0,("create_policy_hnd: ERROR: too many handles (%d) on this pipe.\n",
111
(int)p->pipe_handles->count));
115
pol = SMB_MALLOC_P(struct policy);
117
DEBUG(0,("create_policy_hnd: ERROR: out of memory!\n"));
123
pol->data_ptr = data_ptr;
124
pol->free_fn = free_fn;
127
if (pol_hnd_low == 0)
130
SIVAL(&pol->pol_hnd.data1, 0 , 0); /* first bit must be null */
131
SIVAL(&pol->pol_hnd.data2, 0 , pol_hnd_low ); /* second bit is incrementing */
132
SSVAL(&pol->pol_hnd.data3, 0 , pol_hnd_high); /* second bit is incrementing */
133
SSVAL(&pol->pol_hnd.data4, 0 , (pol_hnd_high>>16)); /* second bit is incrementing */
134
SIVAL(pol->pol_hnd.data5, 0, time(NULL)); /* something random */
135
SIVAL(pol->pol_hnd.data5, 4, sys_getpid()); /* something more random */
137
DLIST_ADD(p->pipe_handles->Policy, pol);
138
p->pipe_handles->count++;
142
DEBUG(4,("Opened policy hnd[%d] ", (int)p->pipe_handles->count));
143
dump_data(4, (char *)hnd, sizeof(*hnd));
148
/****************************************************************************
149
find policy by handle - internal version.
150
****************************************************************************/
152
static struct policy *find_policy_by_hnd_internal(pipes_struct *p, POLICY_HND *hnd, void **data_p)
160
for (i = 0, pol=p->pipe_handles->Policy;pol;pol=pol->next, i++) {
161
if (memcmp(&pol->pol_hnd, hnd, sizeof(*hnd)) == 0) {
162
DEBUG(4,("Found policy hnd[%d] ", (int)i));
163
dump_data(4, (char *)hnd, sizeof(*hnd));
165
*data_p = pol->data_ptr;
170
DEBUG(4,("Policy not found: "));
171
dump_data(4, (char *)hnd, sizeof(*hnd));
173
p->bad_handle_fault_state = True;
178
/****************************************************************************
179
find policy by handle
180
****************************************************************************/
182
BOOL find_policy_by_hnd(pipes_struct *p, POLICY_HND *hnd, void **data_p)
184
return find_policy_by_hnd_internal(p, hnd, data_p) == NULL ? False : True;
187
/****************************************************************************
189
****************************************************************************/
191
BOOL close_policy_hnd(pipes_struct *p, POLICY_HND *hnd)
193
struct policy *pol = find_policy_by_hnd_internal(p, hnd, NULL);
196
DEBUG(3,("Error closing policy\n"));
200
DEBUG(3,("Closed policy\n"));
202
if (pol->free_fn && pol->data_ptr)
203
(*pol->free_fn)(pol->data_ptr);
205
p->pipe_handles->count--;
207
DLIST_REMOVE(p->pipe_handles->Policy, pol);
216
/****************************************************************************
217
Close a pipe - free the handle list if it was the last pipe reference.
218
****************************************************************************/
220
void close_policy_by_pipe(pipes_struct *p)
222
p->pipe_handles->pipe_ref_count--;
224
if (p->pipe_handles->pipe_ref_count == 0) {
226
* Last pipe open on this list - free the list.
228
while (p->pipe_handles->Policy)
229
close_policy_hnd(p, &p->pipe_handles->Policy->pol_hnd);
231
p->pipe_handles->Policy = NULL;
232
p->pipe_handles->count = 0;
234
SAFE_FREE(p->pipe_handles);
235
DEBUG(10,("close_policy_by_pipe: deleted handle list for pipe %s\n", p->name ));
239
/*******************************************************************
240
Shall we allow access to this rpc? Currently this function
241
implements the 'restrict anonymous' setting by denying access to
242
anonymous users if the restrict anonymous level is > 0. Further work
243
will be checking a security descriptor to determine whether a user
244
token has enough access to access the pipe.
245
********************************************************************/
247
BOOL pipe_access_check(pipes_struct *p)
249
/* Don't let anonymous users access this RPC if restrict
252
if (lp_restrict_anonymous() > 0) {
253
user_struct *user = get_valid_user_struct(p->vuid);
255
/* schannel, so we must be ok */
256
if (p->pipe_bound && (p->auth.auth_type == PIPE_AUTH_TYPE_SCHANNEL)) {
261
DEBUG(3, ("invalid vuid %d\n", p->vuid));