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 ****************************************************************************/
  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
  40         tcon = smbsrv_smb_tcon_new(req->smb_conn, scfg->name);
  41         if (!tcon) {
  42                 DEBUG(0,("Couldn't find free connection.\n"));
  43                 return NT_STATUS_INSUFFICIENT_RESOURCES;
  44         }
  45         req->tcon = tcon;
  46
  47         /* init ntvfs function pointers */
  48         status = ntvfs_init_connection(tcon, scfg, type,
  49                                        req->smb_conn->negotiate.protocol,
  50                                        req->smb_conn->connection->event.ctx,
  51                                        req->smb_conn->connection->msg_ctx,
  52                                        req->smb_conn->connection->server_id,
  53                                        &tcon->ntvfs);
  54         if (!NT_STATUS_IS_OK(status)) {
  55                 DEBUG(0, ("make_connection_scfg: connection failed for service %s\n",
  56                           scfg->name));
  57                 goto failed;
  58         }
  59
  60         status = ntvfs_set_oplock_handler(tcon->ntvfs, smbsrv_send_oplock_break, tcon);
  61         if (!NT_STATUS_IS_OK(status)) {
  62                 DEBUG(0,("make_connection: NTVFS failed to set the oplock handler!\n"));
  63                 goto failed;
  64         }
  65
  66         status = ntvfs_set_addr_callbacks(tcon->ntvfs, smbsrv_get_my_addr, smbsrv_get_peer_addr, req->smb_conn);
  67         if (!NT_STATUS_IS_OK(status)) {
  68                 DEBUG(0,("make_connection: NTVFS failed to set the addr callbacks!\n"));
  69                 goto failed;
  70         }
  71
  72         status = ntvfs_set_handle_callbacks(tcon->ntvfs,
  73                                             smbsrv_handle_create_new,
  74                                             smbsrv_handle_make_valid,
  75                                             smbsrv_handle_destroy,
  76                                             smbsrv_handle_search_by_wire_key,
  77                                             smbsrv_handle_get_wire_key,
  78                                             tcon);
  79         if (!NT_STATUS_IS_OK(status)) {
  80                 DEBUG(0,("make_connection: NTVFS failed to set the handle callbacks!\n"));
  81                 goto failed;
  82         }
  83
  84         req->ntvfs = ntvfs_request_create(req->tcon->ntvfs, req,
  85                                           req->session->session_info,
  86                                           SVAL(req->in.hdr,HDR_PID),
  87                                           req->request_time,
  88                                           req, NULL, 0);
  89         if (!req->ntvfs) {
  90                 status = NT_STATUS_NO_MEMORY;
  91                 goto failed;
  92         }
  93
  94         /* Invoke NTVFS connection hook */
  95         status = ntvfs_connect(req->ntvfs, scfg->name);
  96         if (!NT_STATUS_IS_OK(status)) {
  97                 DEBUG(0,("make_connection: NTVFS make connection failed!\n"));
  98                 goto failed;
  99         }
 100
 101         return NT_STATUS_OK;
 102
 103 failed:
 104         req->tcon = NULL;
 105         talloc_free(tcon);
 106         return status;
 107 }
 108
 109 /****************************************************************************
 110  Make a connection to a service.
 111  *
 112  * @param service
 113 ****************************************************************************/
 114 static NTSTATUS make_connection(struct smbsrv_request *req,
 115                                 const char *service, DATA_BLOB password,
 116                                 const char *dev)
 117 {
 118         NTSTATUS status;
 119         enum ntvfs_type type;
 120         const char *type_str;
 121         struct share_config *scfg;
 122         const char *sharetype;
 123
 124         /* the service might be of the form \\SERVER\SHARE. Should we put
 125            the server name we get from this somewhere? */
 126         if (strncmp(service, "\\\\", 2) == 0) {
 127                 char *p = strchr(service+2, '\\');
 128                 if (p) {
 129                         service = p + 1;
 130                 }
 131         }
 132
 133         status = share_get_config(req, req->smb_conn->share_context, service, &scfg);
 134         if (!NT_STATUS_IS_OK(status)) {
 135                 DEBUG(0,("make_connection: couldn't find service %s\n", service));
 136                 return NT_STATUS_BAD_NETWORK_NAME;
 137         }
 138
 139         /* TODO: check the password, when it's share level security! */
 140
 141         if (!socket_check_access(req->smb_conn->connection->socket,
 142                                  scfg->name,
 143                                  share_string_list_option(req, scfg, SHARE_HOSTS_ALLOW),
 144                                  share_string_list_option(req, scfg, SHARE_HOSTS_DENY))) {
 145                 return NT_STATUS_ACCESS_DENIED;
 146         }
 147
 148         /* work out what sort of connection this is */
 149         sharetype = share_string_option(scfg, "type", "DISK");
 150         if (sharetype && strcmp(sharetype, "IPC") == 0) {
 151                 type = NTVFS_IPC;
 152                 type_str = "IPC";
 153         } else if (sharetype && strcmp(sharetype, "PRINTER") == 0) {
 154                 type = NTVFS_PRINT;
 155                 type_str = "LPT:";
 156         } else {
 157                 type = NTVFS_DISK;
 158                 type_str = "A:";
 159         }
 160
 161         if (strcmp(dev, "?????") != 0 && strcasecmp(type_str, dev) != 0) {
 162                 /* the client gave us the wrong device type */
 163                 return NT_STATUS_BAD_DEVICE_TYPE;
 164         }
 165
 166         return make_connection_scfg(req, scfg, type, password, dev);
 167 }
 168
 169 /*
 170   backend for tree connect call
 171 */
 172 NTSTATUS smbsrv_tcon_backend(struct smbsrv_request *req, union smb_tcon *con)
 173 {
 174         NTSTATUS status;
 175
 176         if (con->generic.level == RAW_TCON_TCON) {
 177                 DATA_BLOB password;
 178                 password = data_blob_string_const(con->tcon.in.password);
 179
 180                 status = make_connection(req, con->tcon.in.service, password, con->tcon.in.dev);
 181
 182                 if (!NT_STATUS_IS_OK(status)) {
 183                         return status;
 184                 }
 185
 186                 con->tcon.out.max_xmit = req->smb_conn->negotiate.max_recv;
 187                 con->tcon.out.tid = req->tcon->tid;
 188
 189                 return status;
 190         }
 191
 192         /* TODO: take a look at tconx.in.flags! */
 193
 194         status = make_connection(req, con->tconx.in.path, con->tconx.in.password,
 195                                  con->tconx.in.device);
 196         if (!NT_STATUS_IS_OK(status)) {
 197                 return status;
 198         }
 199
 200         con->tconx.out.tid = req->tcon->tid;
 201         con->tconx.out.dev_type = talloc_strdup(req, req->tcon->ntvfs->dev_type);
 202         con->tconx.out.fs_type = talloc_strdup(req, req->tcon->ntvfs->fs_type);
 203         con->tconx.out.options = SMB_SUPPORT_SEARCH_BITS | (share_int_option(req->tcon->ntvfs->config, SHARE_CSC_POLICY, SHARE_CSC_POLICY_DEFAULT) << 2);
 204         if (share_bool_option(req->tcon->ntvfs->config, SHARE_MSDFS_ROOT, SHARE_MSDFS_ROOT_DEFAULT) && lp_host_msdfs()) {
 205                 con->tconx.out.options |= SMB_SHARE_IN_DFS;
 206         }
 207
 208         return status;
 209 }