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/*
* Unix SMB/CIFS implementation.
* RPC Pipe client / server routines
* Copyright (C) Andrew Tridgell 1992-1997,
* Copyright (C) Luke Kenneth Casson Leighton 1996-1997,
* Copyright (C) Jeremy Allison 2001.
*
* 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"
/* This is the max handles across all instances of a pipe name. */
#ifndef MAX_OPEN_POLS
#define MAX_OPEN_POLS 1024
#endif
/****************************************************************************
Hack as handles need to be persisant over lsa pipe closes so long as a samr
pipe is open. JRA.
****************************************************************************/
static BOOL is_samr_lsa_pipe(const char *pipe_name)
{
return (strstr(pipe_name, "samr") || strstr(pipe_name, "lsa"));
}
/****************************************************************************
Initialise a policy handle list on a pipe. Handle list is shared between all
pipes of the same name.
****************************************************************************/
BOOL init_pipe_handle_list(pipes_struct *p, char *pipe_name)
{
pipes_struct *plist = get_first_internal_pipe();
struct handle_list *hl = NULL;
for (plist = get_first_internal_pipe(); plist; plist = get_next_internal_pipe(plist)) {
if (strequal( plist->name, pipe_name) ||
(is_samr_lsa_pipe(plist->name) && is_samr_lsa_pipe(pipe_name))) {
if (!plist->pipe_handles) {
pstring msg;
slprintf(msg, sizeof(msg)-1, "init_pipe_handles: NULL pipe_handle pointer in pipe %s",
pipe_name );
smb_panic(msg);
}
hl = plist->pipe_handles;
break;
}
}
if (!hl) {
/*
* No handle list for this pipe (first open of pipe).
* Create list.
*/
if ((hl = (struct handle_list *)malloc(sizeof(struct handle_list))) == NULL)
return False;
ZERO_STRUCTP(hl);
DEBUG(10,("init_pipe_handles: created handle list for pipe %s\n", pipe_name ));
}
/*
* One more pipe is using this list.
*/
hl->pipe_ref_count++;
/*
* Point this pipe at this list.
*/
p->pipe_handles = hl;
DEBUG(10,("init_pipe_handles: pipe_handles ref count = %u for pipe %s\n",
p->pipe_handles->pipe_ref_count, pipe_name ));
return True;
}
/****************************************************************************
find first available policy slot. creates a policy handle for you.
****************************************************************************/
BOOL create_policy_hnd(pipes_struct *p, POLICY_HND *hnd, void (*free_fn)(void *), void *data_ptr)
{
static uint32 pol_hnd_low = 0;
static uint32 pol_hnd_high = 0;
struct policy *pol;
if (p->pipe_handles->count > MAX_OPEN_POLS) {
DEBUG(0,("create_policy_hnd: ERROR: too many handles (%d) on this pipe.\n",
(int)p->pipe_handles->count));
return False;
}
pol = (struct policy *)malloc(sizeof(*p));
if (!pol) {
DEBUG(0,("create_policy_hnd: ERROR: out of memory!\n"));
return False;
}
ZERO_STRUCTP(pol);
pol->data_ptr = data_ptr;
pol->free_fn = free_fn;
pol_hnd_low++;
if (pol_hnd_low == 0)
(pol_hnd_high)++;
SIVAL(&pol->pol_hnd.data1, 0 , 0); /* first bit must be null */
SIVAL(&pol->pol_hnd.data2, 0 , pol_hnd_low ); /* second bit is incrementing */
SSVAL(&pol->pol_hnd.data3, 0 , pol_hnd_high); /* second bit is incrementing */
SSVAL(&pol->pol_hnd.data4, 0 , (pol_hnd_high>>16)); /* second bit is incrementing */
SIVAL(pol->pol_hnd.data5, 0, time(NULL)); /* something random */
SIVAL(pol->pol_hnd.data5, 4, sys_getpid()); /* something more random */
DLIST_ADD(p->pipe_handles->Policy, pol);
p->pipe_handles->count++;
/*
* Ensure we don't idle this connection if a handle is open.
* Increment the number of files open on the first handle create.
*/
if (p->pipe_handles->count == 1)
p->conn->num_files_open++;
*hnd = pol->pol_hnd;
DEBUG(4,("Opened policy hnd[%d] ", (int)p->pipe_handles->count));
dump_data(4, (char *)hnd, sizeof(*hnd));
return True;
}
/****************************************************************************
find policy by handle - internal version.
****************************************************************************/
static struct policy *find_policy_by_hnd_internal(pipes_struct *p, POLICY_HND *hnd, void **data_p)
{
struct policy *pol;
size_t i;
if (data_p)
*data_p = NULL;
for (i = 0, pol=p->pipe_handles->Policy;pol;pol=pol->next, i++) {
if (memcmp(&pol->pol_hnd, hnd, sizeof(*hnd)) == 0) {
DEBUG(4,("Found policy hnd[%d] ", (int)i));
dump_data(4, (char *)hnd, sizeof(*hnd));
if (data_p)
*data_p = pol->data_ptr;
return pol;
}
}
DEBUG(4,("Policy not found: "));
dump_data(4, (char *)hnd, sizeof(*hnd));
p->bad_handle_fault_state = True;
return NULL;
}
/****************************************************************************
find policy by handle
****************************************************************************/
BOOL find_policy_by_hnd(pipes_struct *p, POLICY_HND *hnd, void **data_p)
{
return find_policy_by_hnd_internal(p, hnd, data_p) == NULL ? False : True;
}
/****************************************************************************
Close a policy.
****************************************************************************/
BOOL close_policy_hnd(pipes_struct *p, POLICY_HND *hnd)
{
struct policy *pol = find_policy_by_hnd_internal(p, hnd, NULL);
if (!pol) {
DEBUG(3,("Error closing policy\n"));
return False;
}
DEBUG(3,("Closed policy\n"));
if (pol->free_fn && pol->data_ptr)
(*pol->free_fn)(pol->data_ptr);
p->pipe_handles->count--;
/*
* Ensure we can idle this connection if this is the last handle.
* Decrement the number of files open on the last handle delete.
*/
if (p->pipe_handles->count == 0)
p->conn->num_files_open--;
DLIST_REMOVE(p->pipe_handles->Policy, pol);
ZERO_STRUCTP(pol);
SAFE_FREE(pol);
return True;
}
/****************************************************************************
Close a pipe - free the handle list if it was the last pipe reference.
****************************************************************************/
void close_policy_by_pipe(pipes_struct *p)
{
p->pipe_handles->pipe_ref_count--;
if (p->pipe_handles->pipe_ref_count == 0) {
/*
* Last pipe open on this list - free the list.
*/
while (p->pipe_handles->Policy)
close_policy_hnd(p, &p->pipe_handles->Policy->pol_hnd);
p->pipe_handles->Policy = NULL;
p->pipe_handles->count = 0;
SAFE_FREE(p->pipe_handles);
DEBUG(10,("close_policy_by_pipe: deleted handle list for pipe %s\n", p->name ));
}
}
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