source3/lib/conn_tdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Low-level connections.tdb access functions
   4    Copyright (C) Volker Lendecke 2007
   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 "system/filesys.h"
  22 #include "smbd/globals.h"
  23 #include "dbwrap/dbwrap.h"
  24 #include "dbwrap/dbwrap_open.h"
  25 #include "dbwrap/dbwrap_rbt.h"
  26 #include "messages.h"
  27 #include "lib/conn_tdb.h"
  28 #include "util_tdb.h"
  29
  30 struct connections_forall_state {
  31         struct db_context *session_by_pid;
  32         int (*fn)(const struct connections_key *key,
  33                   const struct connections_data *data,
  34                   void *private_data);
  35         void *private_data;
  36         int count;
  37 };
  38
  39 struct connections_forall_session {
  40         uid_t uid;
  41         gid_t gid;
  42         fstring machine;
  43         fstring addr;
  44         uint16_t cipher;
  45         uint16_t dialect;
  46 };
  47
  48 static int collect_sessions_fn(struct smbXsrv_session_global0 *global,
  49                                void *connections_forall_state)
  50 {
  51         NTSTATUS status;
  52         struct connections_forall_state *state =
  53                 (struct connections_forall_state*)connections_forall_state;
  54
  55         uint32_t id = global->session_global_id;
  56         struct connections_forall_session sess;
  57
  58         if (global->auth_session_info == NULL) {
  59                 sess.uid = -1;
  60                 sess.gid = -1;
  61         } else {
  62                 sess.uid = global->auth_session_info->unix_token->uid;
  63                 sess.gid = global->auth_session_info->unix_token->gid;
  64         }
  65         fstrcpy(sess.machine, global->channels[0].remote_name);
  66         fstrcpy(sess.addr, global->channels[0].remote_address);
  67         sess.cipher = global->channels[0].encryption_cipher;
  68         sess.dialect = global->connection_dialect;
  69
  70         status = dbwrap_store(state->session_by_pid,
  71                               make_tdb_data((void*)&id, sizeof(id)),
  72                               make_tdb_data((void*)&sess, sizeof(sess)),
  73                               TDB_INSERT);
  74         if (!NT_STATUS_IS_OK(status)) {
  75                 DEBUG(0, ("Failed to store record: %s\n", nt_errstr(status)));
  76         }
  77         return 0;
  78 }
  79
  80 static int traverse_tcon_fn(struct smbXsrv_tcon_global0 *global,
  81                             void *connections_forall_state)
  82 {
  83         NTSTATUS status;
  84         struct connections_forall_state *state =
  85                 (struct connections_forall_state*)connections_forall_state;
  86
  87         struct connections_key key;
  88         struct connections_data data;
  89
  90         uint32_t sess_id = global->session_global_id;
  91         struct connections_forall_session sess = {
  92                 .uid = -1,
  93                 .gid = -1,
  94         };
  95
  96         TDB_DATA val = tdb_null;
  97
  98         /*
  99          * Note: that share_name is defined as array without a pointer.
 100          * that's why it's always a valid pointer here.
 101          */
 102         if (strlen(global->share_name) == 0) {
 103                 /*
 104                  * when a smbXsrv_tcon is created it's created
 105                  * with emtpy share_name first in order to allocate
 106                  * an id, before filling in the details.
 107                  */
 108                 return 0;
 109         }
 110
 111         status = dbwrap_fetch(state->session_by_pid, state,
 112                               make_tdb_data((void*)&sess_id, sizeof(sess_id)),
 113                               &val);
 114         if (NT_STATUS_IS_OK(status)) {
 115                 memcpy((uint8_t *)&sess, val.dptr, val.dsize);
 116         }
 117
 118         ZERO_STRUCT(key);
 119         ZERO_STRUCT(data);
 120
 121         key.pid = data.pid = global->server_id;
 122         key.cnum = data.cnum = global->tcon_global_id;
 123         fstrcpy(key.name, global->share_name);
 124         fstrcpy(data.servicename, global->share_name);
 125         data.uid = sess.uid;
 126         data.gid = sess.gid;
 127         fstrcpy(data.addr, sess.addr);
 128         fstrcpy(data.machine, sess.machine);
 129         data.start = nt_time_to_unix(global->creation_time);
 130         data.encryption_flags = global->encryption_flags;
 131         data.cipher = sess.cipher;
 132         data.dialect = sess.dialect;
 133
 134         state->count++;
 135
 136         return state->fn(&key, &data, state->private_data);
 137 }
 138
 139 int connections_forall_read(int (*fn)(const struct connections_key *key,
 140                                       const struct connections_data *data,
 141                                       void *private_data),
 142                             void *private_data)
 143 {
 144         TALLOC_CTX *frame = talloc_stackframe();
 145         struct connections_forall_state *state =
 146                 talloc_zero(talloc_tos(), struct connections_forall_state);
 147         NTSTATUS status;
 148         int ret = -1;
 149
 150         state->session_by_pid = db_open_rbt(state);
 151         state->fn = fn;
 152         state->private_data = private_data;
 153         status = smbXsrv_session_global_traverse(collect_sessions_fn, state);
 154         if (!NT_STATUS_IS_OK(status)) {
 155                 DEBUG(0, ("Failed to traverse sessions: %s\n",
 156                           nt_errstr(status)));
 157                 goto done;
 158         }
 159
 160         status = smbXsrv_tcon_global_traverse(traverse_tcon_fn, state);
 161         if (!NT_STATUS_IS_OK(status)) {
 162                 DEBUG(0, ("Failed to traverse tree connects: %s\n",
 163                           nt_errstr(status)));
 164                 goto done;
 165         }
 166         ret = state->count;
 167 done:
 168         talloc_free(frame);
 169         return ret;
 170 }
 171