--- /dev/null
+/*
+ * 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"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_RPC_SRV
+
+/* 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 = SMB_MALLOC_P(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 = %lu for pipe %s\n",
+ (unsigned long)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 = SMB_MALLOC_P(struct policy);
+ 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++;
+
+ *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--;
+
+ 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 ));
+ }
+}
+
+/*******************************************************************
+Shall we allow access to this rpc? Currently this function
+implements the 'restrict anonymous' setting by denying access to
+anonymous users if the restrict anonymous level is > 0. Further work
+will be checking a security descriptor to determine whether a user
+token has enough access to access the pipe.
+********************************************************************/
+
+BOOL pipe_access_check(pipes_struct *p)
+{
+ /* Don't let anonymous users access this RPC if restrict
+ anonymous > 0 */
+
+ if (lp_restrict_anonymous() > 0) {
+ user_struct *user = get_valid_user_struct(p->vuid);
+
+ /* schannel, so we must be ok */
+ if (p->pipe_bound && (p->auth.auth_type == PIPE_AUTH_TYPE_SCHANNEL)) {
+ return True;
+ }
+
+ if (!user) {
+ DEBUG(3, ("invalid vuid %d\n", p->vuid));
+ return False;
+ }
+
+ if (user->guest) {
+ return False;
+ }
+ }
+
+ return True;
+}
projects / samba / blobdiff