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