source4/smb_server/smb/service.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    service (connection) handling
   4    Copyright (C) Andrew Tridgell 1992-2003
   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 "smb_server/smb_server.h"
  22 #include "smbd/service_stream.h"
  23 #include "ntvfs/ntvfs.h"
  24 #include "param/param.h"
  25
  26 /****************************************************************************
  27   Make a connection, given the snum to connect to, and the vuser of the
  28   connecting user if appropriate.
  29   Does note invoke the NTVFS connection hook
  30 ****************************************************************************/
  31 static NTSTATUS make_connection_scfg(struct smbsrv_request *req,
  32                                      struct share_config *scfg,
  33                                      enum ntvfs_type type,
  34                                      DATA_BLOB password,
  35                                      const char *dev)
  36 {
  37         struct smbsrv_tcon *tcon;
  38         NTSTATUS status;
  39         uint64_t ntvfs_caps = 0;
  40
  41         tcon = smbsrv_smb_tcon_new(req->smb_conn, scfg->name);
  42         if (!tcon) {
  43                 DEBUG(0,("Couldn't find free connection.\n"));
  44                 return NT_STATUS_INSUFFICIENT_RESOURCES;
  45         }
  46         req->tcon = tcon;
  47
  48         if (req->smb_conn->negotiate.client_caps & CAP_LEVEL_II_OPLOCKS) {
  49                 ntvfs_caps |= NTVFS_CLIENT_CAP_LEVEL_II_OPLOCKS;
  50         }
  51
  52         /* init ntvfs function pointers */
  53         status = ntvfs_init_connection(tcon, scfg, type,
  54                                        req->smb_conn->negotiate.protocol,
  55                                        ntvfs_caps,
  56                                        req->smb_conn->connection->event.ctx,
  57                                        req->smb_conn->connection->msg_ctx,
  58                                        req->smb_conn->lp_ctx,
  59                                        req->smb_conn->connection->server_id,
  60                                        &tcon->ntvfs);
  61         if (!NT_STATUS_IS_OK(status)) {
  62                 DEBUG(0, ("make_connection_scfg: connection failed for service %s\n",
  63                           scfg->name));
  64                 goto failed;
  65         }
  66
  67         status = ntvfs_set_oplock_handler(tcon->ntvfs, smbsrv_send_oplock_break, tcon);
  68         if (!NT_STATUS_IS_OK(status)) {
  69                 DEBUG(0,("make_connection: NTVFS failed to set the oplock handler!\n"));
  70                 goto failed;
  71         }
  72
  73         status = ntvfs_set_addresses(tcon->ntvfs,
  74                                      req->smb_conn->connection->local_address,
  75                                      req->smb_conn->connection->remote_address);
  76         if (!NT_STATUS_IS_OK(status)) {
  77                 DEBUG(0,("make_connection: NTVFS failed to set the addresses!\n"));
  78                 goto failed;
  79         }
  80
  81         status = ntvfs_set_handle_callbacks(tcon->ntvfs,
  82                                             smbsrv_handle_create_new,
  83                                             smbsrv_handle_make_valid,
  84                                             smbsrv_handle_destroy,
  85                                             smbsrv_handle_search_by_wire_key,
  86                                             smbsrv_handle_get_wire_key,
  87                                             tcon);
  88         if (!NT_STATUS_IS_OK(status)) {
  89                 DEBUG(0,("make_connection: NTVFS failed to set the handle callbacks!\n"));
  90                 goto failed;
  91         }
  92
  93         return NT_STATUS_OK;
  94
  95 failed:
  96         req->tcon = NULL;
  97         talloc_free(tcon);
  98         return status;
  99 }
 100
 101 /****************************************************************************
 102  Make a connection to a service.
 103  *
 104  * @param service
 105 ****************************************************************************/
 106 static NTSTATUS make_connection(struct smbsrv_request *req,
 107                                 const char *service, DATA_BLOB password,
 108                                 const char *dev)
 109 {
 110         NTSTATUS status;
 111         enum ntvfs_type type;
 112         const char *type_str;
 113         struct share_config *scfg;
 114         const char *sharetype;
 115
 116         /* the service might be of the form \\SERVER\SHARE. Should we put
 117            the server name we get from this somewhere? */
 118         if (strncmp(service, "\\\\", 2) == 0) {
 119                 char *p = strchr(service+2, '\\');
 120                 if (p) {
 121                         service = p + 1;
 122                 }
 123         }
 124
 125         status = share_get_config(req, req->smb_conn->share_context, service, &scfg);
 126         if (!NT_STATUS_IS_OK(status)) {
 127                 DEBUG(0,("make_connection: couldn't find service %s: %s\n", service, nt_errstr(status)));
 128                 return NT_STATUS_BAD_NETWORK_NAME;
 129         }
 130
 131         /* TODO: check the password, when it's share level security! */
 132
 133         if (!socket_check_access(req->smb_conn->connection->socket,
 134                                  scfg->name,
 135                                  share_string_list_option(req, scfg, SHARE_HOSTS_ALLOW),
 136                                  share_string_list_option(req, scfg, SHARE_HOSTS_DENY))) {
 137                 return NT_STATUS_ACCESS_DENIED;
 138         }
 139
 140         /* work out what sort of connection this is */
 141         sharetype = share_string_option(scfg, "type", "DISK");
 142         if (sharetype && strcmp(sharetype, "IPC") == 0) {
 143                 type = NTVFS_IPC;
 144                 type_str = "IPC";
 145         } else if (sharetype && strcmp(sharetype, "PRINTER") == 0) {
 146                 type = NTVFS_PRINT;
 147                 type_str = "LPT:";
 148         } else {
 149                 type = NTVFS_DISK;
 150                 type_str = "A:";
 151         }
 152
 153         if (strcmp(dev, "?????") != 0 && strcasecmp(type_str, dev) != 0) {
 154                 /* the client gave us the wrong device type */
 155                 return NT_STATUS_BAD_DEVICE_TYPE;
 156         }
 157
 158         return make_connection_scfg(req, scfg, type, password, dev);
 159 }
 160
 161 /*
 162   backend for tree connect call, in preparation for calling ntvfs_connect()
 163 */
 164 NTSTATUS smbsrv_tcon_backend(struct smbsrv_request *req, union smb_tcon *con)
 165 {
 166         NTSTATUS status;
 167
 168         if (con->generic.level == RAW_TCON_TCON) {
 169                 DATA_BLOB password;
 170                 password = data_blob_string_const(con->tcon.in.password);
 171
 172                 status = make_connection(req, con->tcon.in.service, password, con->tcon.in.dev);
 173
 174                 if (!NT_STATUS_IS_OK(status)) {
 175                         return status;
 176                 }
 177
 178                 con->tcon.out.max_xmit = req->smb_conn->negotiate.max_recv;
 179                 con->tcon.out.tid = req->tcon->tid;
 180
 181                 return status;
 182         }
 183
 184         /* TODO: take a look at tconx.in.flags! */
 185
 186         status = make_connection(req, con->tconx.in.path, con->tconx.in.password,
 187                                  con->tconx.in.device);
 188         if (!NT_STATUS_IS_OK(status)) {
 189                 return status;
 190         }
 191
 192         con->tconx.out.tid = req->tcon->tid;
 193         con->tconx.out.options = SMB_SUPPORT_SEARCH_BITS | (share_int_option(req->tcon->ntvfs->config, SHARE_CSC_POLICY, SHARE_CSC_POLICY_DEFAULT) << 2);
 194         if (share_bool_option(req->tcon->ntvfs->config, SHARE_MSDFS_ROOT, SHARE_MSDFS_ROOT_DEFAULT) && lpcfg_host_msdfs(req->smb_conn->lp_ctx)) {
 195                 con->tconx.out.options |= SMB_SHARE_IN_DFS;
 196         }
 197
 198         return status;
 199 }