source3/smbd/globals.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    smbd globals
   4    Copyright (C) Stefan Metzmacher 2009
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "smbd/smbd.h"
  22 #include "smbd/globals.h"
  23 #include "../lib/util/memcache.h"
  24 #include "messages.h"
  25 #include <tdb.h>
  26
  27 #ifdef USE_DMAPI
  28 struct smbd_dmapi_context *dmapi_ctx = NULL;
  29 #endif
  30
  31 const struct mangle_fns *mangle_fns = NULL;
  32
  33 unsigned char *chartest = NULL;
  34 TDB_CONTEXT *tdb_mangled_cache = NULL;
  35
  36 /*
  37   this determines how many characters are used from the original filename
  38   in the 8.3 mangled name. A larger value leads to a weaker hash and more collisions.
  39   The largest possible value is 6.
  40 */
  41 unsigned mangle_prefix = 0;
  42
  43 bool logged_ioctl_message = false;
  44
  45 time_t last_smb_conf_reload_time = 0;
  46 pid_t background_lpq_updater_pid = -1;
  47
  48 /****************************************************************************
  49  structure to hold a linked list of queued messages.
  50  for processing.
  51 ****************************************************************************/
  52 uint32_t common_flags2 = FLAGS2_LONG_PATH_COMPONENTS|FLAGS2_32_BIT_ERROR_CODES|FLAGS2_EXTENDED_ATTRIBUTES;
  53
  54 struct smb_trans_enc_state *partial_srv_trans_enc_ctx = NULL;
  55 struct smb_trans_enc_state *srv_trans_enc_ctx = NULL;
  56
  57 /* A stack of security contexts.  We include the current context as being
  58    the first one, so there is room for another MAX_SEC_CTX_DEPTH more. */
  59 struct sec_ctx sec_ctx_stack[MAX_SEC_CTX_DEPTH + 1];
  60 int sec_ctx_stack_ndx = 0;
  61 bool become_uid_done = false;
  62 bool become_gid_done = false;
  63
  64 uint32_t global_client_caps = 0;
  65
  66 uint16_t fnf_handle = 257;
  67
  68 /* A stack of current_user connection contexts. */
  69 struct conn_ctx conn_ctx_stack[MAX_SEC_CTX_DEPTH];
  70 int conn_ctx_stack_ndx = 0;
  71
  72 struct vfs_init_function_entry *backends = NULL;
  73 char *sparse_buf = NULL;
  74 char *LastDir = NULL;
  75
  76 struct smbd_parent_context *am_parent = NULL;
  77 struct memcache *smbd_memcache_ctx = NULL;
  78 bool exit_firsttime = true;
  79
  80 struct smbXsrv_client *global_smbXsrv_client = NULL;
  81
  82 struct memcache *smbd_memcache(void)
  83 {
  84         if (!smbd_memcache_ctx) {
  85                 /*
  86                  * Note we MUST use the NULL context here, not the
  87                  * autofree context, to avoid side effects in forked
  88                  * children exiting.
  89                  */
  90                 smbd_memcache_ctx = memcache_init(NULL,
  91                                                   lp_max_stat_cache_size()*1024);
  92         }
  93         if (!smbd_memcache_ctx) {
  94                 smb_panic("Could not init smbd memcache");
  95         }
  96
  97         return smbd_memcache_ctx;
  98 }
  99
 100 void smbd_init_globals(void)
 101 {
 102         ZERO_STRUCT(conn_ctx_stack);
 103
 104         ZERO_STRUCT(sec_ctx_stack);
 105 }
 106
 107 struct GUID smbd_request_guid(struct smb_request *smb1req, uint16_t idx)
 108 {
 109         struct GUID v = {
 110                 .time_low = (uint32_t)smb1req->mid,
 111                 .time_hi_and_version = idx,
 112         };
 113
 114         if (smb1req->smb2req != NULL) {
 115                 v.time_mid = (uint16_t)smb1req->smb2req->current_idx;
 116         } else {
 117                 v.time_mid = (uint16_t)(uintptr_t)smb1req->vwv;
 118         }
 119
 120         SBVAL((uint8_t *)&v, 8, smb1req->xconn->channel_id);
 121
 122         return v;
 123 }