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