source3/utils/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 "conn_tdb.h"
  28 #include "util_tdb.h"
  29 #include "lib/util/string_wrappers.h"
  30
  31 struct connections_forall_state {
  32         struct db_context *session_by_pid;
  33         int (*fn)(const struct connections_key *key,
  34                   const struct connections_data *data,
  35                   void *private_data);
  36         void *private_data;
  37         int count;
  38 };
  39
  40 struct connections_forall_session {
  41         uid_t uid;
  42         gid_t gid;
  43         fstring machine;
  44         fstring addr;
  45         uint16_t cipher;
  46         uint16_t dialect;
  47         uint8_t signing_flags;
  48 };
  49
  50 static int collect_sessions_fn(struct smbXsrv_session_global0 *global,
  51                                void *connections_forall_state)
  52 {
  53         NTSTATUS status;
  54         struct connections_forall_state *state =
  55                 (struct connections_forall_state*)connections_forall_state;
  56
  57         uint32_t id = global->session_global_id;
  58         struct connections_forall_session sess;
  59
  60         if (global->auth_session_info == NULL) {
  61                 sess.uid = -1;
  62                 sess.gid = -1;
  63         } else {
  64                 sess.uid = global->auth_session_info->unix_token->uid;
  65                 sess.gid = global->auth_session_info->unix_token->gid;
  66         }
  67         fstrcpy(sess.machine, global->channels[0].remote_name);
  68         fstrcpy(sess.addr, global->channels[0].remote_address);
  69         sess.cipher = global->channels[0].encryption_cipher;
  70         sess.dialect = global->connection_dialect;
  71         sess.signing_flags = global->signing_flags;
  72
  73         status = dbwrap_store(state->session_by_pid,
  74                               make_tdb_data((void*)&id, sizeof(id)),
  75                               make_tdb_data((void*)&sess, sizeof(sess)),
  76                               TDB_INSERT);
  77         if (!NT_STATUS_IS_OK(status)) {
  78                 DEBUG(0, ("Failed to store record: %s\n", nt_errstr(status)));
  79         }
  80         return 0;
  81 }
  82
  83 static int traverse_tcon_fn(struct smbXsrv_tcon_global0 *global,
  84                             void *connections_forall_state)
  85 {
  86         NTSTATUS status;
  87         struct connections_forall_state *state =
  88                 (struct connections_forall_state*)connections_forall_state;
  89
  90         struct connections_key key;
  91         struct connections_data data;
  92
  93         uint32_t sess_id = global->session_global_id;
  94         struct connections_forall_session sess = {
  95                 .uid = -1,
  96                 .gid = -1,
  97         };
  98
  99         TDB_DATA val = tdb_null;
 100
 101         /*
 102          * Note: that share_name is defined as array without a pointer.
 103          * that's why it's always a valid pointer here.
 104          */
 105         if (strlen(global->share_name) == 0) {
 106                 /*
 107                  * when a smbXsrv_tcon is created it's created
 108                  * with empty share_name first in order to allocate
 109                  * an id, before filling in the details.
 110                  */
 111                 return 0;
 112         }
 113
 114         status = dbwrap_fetch(state->session_by_pid, state,
 115                               make_tdb_data((void*)&sess_id, sizeof(sess_id)),
 116                               &val);
 117         if (NT_STATUS_IS_OK(status)) {
 118                 memcpy((uint8_t *)&sess, val.dptr, val.dsize);
 119         }
 120
 121         ZERO_STRUCT(key);
 122         ZERO_STRUCT(data);
 123
 124         key.pid = data.pid = global->server_id;
 125         key.cnum = data.cnum = global->tcon_global_id;
 126         fstrcpy(key.name, global->share_name);
 127         fstrcpy(data.servicename, global->share_name);
 128         data.uid = sess.uid;
 129         data.gid = sess.gid;
 130         fstrcpy(data.addr, sess.addr);
 131         fstrcpy(data.machine, sess.machine);
 132         data.start = nt_time_to_unix(global->creation_time);
 133         data.encryption_flags = global->encryption_flags;
 134         data.cipher = sess.cipher;
 135         data.dialect = sess.dialect;
 136         data.signing_flags = global->signing_flags;
 137
 138         state->count++;
 139
 140         return state->fn(&key, &data, state->private_data);
 141 }
 142
 143 int connections_forall_read(int (*fn)(const struct connections_key *key,
 144                                       const struct connections_data *data,
 145                                       void *private_data),
 146                             void *private_data)
 147 {
 148         TALLOC_CTX *frame = talloc_stackframe();
 149         struct connections_forall_state *state =
 150                 talloc_zero(talloc_tos(), struct connections_forall_state);
 151         NTSTATUS status;
 152         int ret = -1;
 153
 154         state->session_by_pid = db_open_rbt(state);
 155         state->fn = fn;
 156         state->private_data = private_data;
 157         status = smbXsrv_session_global_traverse(collect_sessions_fn, state);
 158         if (!NT_STATUS_IS_OK(status)) {
 159                 DEBUG(0, ("Failed to traverse sessions: %s\n",
 160                           nt_errstr(status)));
 161                 goto done;
 162         }
 163
 164         status = smbXsrv_tcon_global_traverse(traverse_tcon_fn, state);
 165         if (!NT_STATUS_IS_OK(status)) {
 166                 DEBUG(0, ("Failed to traverse tree connects: %s\n",
 167                           nt_errstr(status)));
 168                 goto done;
 169         }
 170         ret = state->count;
 171 done:
 172         talloc_free(frame);
 173         return ret;
 174 }