source4/libcli/raw/clitree.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    SMB client tree context management functions
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) James Myers 2003 <myersjj@samba.org>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 #define SETUP_REQUEST_TREE(cmd, wct, buflen) do { \
  25         req = cli_request_setup(tree, cmd, wct, buflen); \
  26         if (!req) return NULL; \
  27 } while (0)
  28
  29
  30 /****************************************************************************
  31  Initialize the tree context
  32 ****************************************************************************/
  33 struct cli_tree *cli_tree_init(struct cli_session *session)
  34 {
  35         struct cli_tree *tree;
  36         TALLOC_CTX *mem_ctx = talloc_init("cli_tree");
  37         if (mem_ctx == NULL) {
  38                 return NULL;
  39         }
  40
  41         tree = talloc_zero(mem_ctx, sizeof(*tree));
  42         if (!tree) {
  43                 talloc_destroy(mem_ctx);
  44                 return NULL;
  45         }
  46
  47         tree->mem_ctx = mem_ctx;
  48         tree->session = session;
  49         tree->session->reference_count++;
  50
  51         return tree;
  52 }
  53
  54 /****************************************************************************
  55 reduce reference count on a tree and destroy if <= 0
  56 ****************************************************************************/
  57 void cli_tree_close(struct cli_tree *tree)
  58 {
  59         if (!tree) return;
  60         tree->reference_count--;
  61         if (tree->reference_count <= 0) {
  62                 cli_session_close(tree->session);
  63                 talloc_destroy(tree->mem_ctx);
  64         }
  65 }
  66
  67
  68 /****************************************************************************
  69  Send a tconX (async send)
  70 ****************************************************************************/
  71 struct cli_request *smb_tree_connect_send(struct cli_tree *tree, union smb_tcon *parms)
  72 {
  73         struct cli_request *req;
  74
  75         switch (parms->tcon.level) {
  76         case RAW_TCON_TCON:
  77                 SETUP_REQUEST_TREE(SMBtcon, 0, 0);
  78                 cli_req_append_ascii4(req, parms->tcon.in.service, STR_ASCII);
  79                 cli_req_append_ascii4(req, parms->tcon.in.password,STR_ASCII);
  80                 cli_req_append_ascii4(req, parms->tcon.in.dev,     STR_ASCII);
  81                 break;
  82
  83         case RAW_TCON_TCONX:
  84                 SETUP_REQUEST_TREE(SMBtconX, 4, 0);
  85                 SSVAL(req->out.vwv, VWV(0), 0xFF);
  86                 SSVAL(req->out.vwv, VWV(1), 0);
  87                 SSVAL(req->out.vwv, VWV(2), parms->tconx.in.flags);
  88                 SSVAL(req->out.vwv, VWV(3), parms->tconx.in.password.length);
  89                 cli_req_append_blob(req, &parms->tconx.in.password);
  90                 cli_req_append_string(req, parms->tconx.in.path,   STR_TERMINATE | STR_UPPER);
  91                 cli_req_append_string(req, parms->tconx.in.device, STR_TERMINATE | STR_ASCII);
  92                 break;
  93         }
  94
  95         if (!cli_request_send(req)) {
  96                 cli_request_destroy(req);
  97                 return NULL;
  98         }
  99
 100         return req;
 101 }
 102
 103 /****************************************************************************
 104  Send a tconX (async recv)
 105 ****************************************************************************/
 106 NTSTATUS smb_tree_connect_recv(struct cli_request *req, TALLOC_CTX *mem_ctx, union smb_tcon *parms)
 107 {
 108         char *p;
 109
 110         if (!cli_request_receive(req) ||
 111             cli_request_is_error(req)) {
 112                 goto failed;
 113         }
 114
 115         switch (parms->tcon.level) {
 116         case RAW_TCON_TCON:
 117                 CLI_CHECK_WCT(req, 2);
 118                 parms->tcon.out.max_xmit = SVAL(req->in.vwv, VWV(0));
 119                 parms->tcon.out.cnum = SVAL(req->in.vwv, VWV(1));
 120                 break;
 121
 122         case RAW_TCON_TCONX:
 123                 ZERO_STRUCT(parms->tconx.out);
 124                 CLI_CHECK_MIN_WCT(req, 0);  /* this depends on the protocol level */
 125                 parms->tconx.out.cnum = SVAL(req->in.hdr, HDR_TID);
 126                 if (req->in.wct >= 4) {
 127                         parms->tconx.out.options = SVAL(req->in.vwv, VWV(3));
 128                 }
 129
 130                 /* output is actual service name */
 131                 p = req->in.data;
 132                 if (!p) break;
 133
 134                 p += cli_req_pull_string(req, mem_ctx, &parms->tconx.out.dev_type,
 135                                          p, -1, STR_ASCII | STR_TERMINATE);
 136                 p += cli_req_pull_string(req, mem_ctx, &parms->tconx.out.fs_type,
 137                                          p, -1, STR_TERMINATE);
 138                 break;
 139         }
 140
 141 failed:
 142         return cli_request_destroy(req);
 143 }
 144
 145 /****************************************************************************
 146  Send a tconX (sync interface)
 147 ****************************************************************************/
 148 NTSTATUS smb_tree_connect(struct cli_tree *tree, TALLOC_CTX *mem_ctx, union smb_tcon *parms)
 149 {
 150         struct cli_request *req = smb_tree_connect_send(tree, parms);
 151         return smb_tree_connect_recv(req, mem_ctx, parms);
 152 }
 153
 154
 155 /****************************************************************************
 156  Send a tree disconnect.
 157 ****************************************************************************/
 158 NTSTATUS smb_tree_disconnect(struct cli_tree *tree)
 159 {
 160         struct cli_request *req;
 161
 162         if (!tree) return NT_STATUS_OK;
 163         req = cli_request_setup(tree, SMBtdis, 0, 0);
 164
 165         if (cli_request_send(req)) {
 166                 cli_request_receive(req);
 167         }
 168         return cli_request_destroy(req);
 169 }
 170
 171
 172 /*
 173   a convenient function to establish a cli_tree from scratch, using reasonable default
 174   parameters
 175 */
 176 NTSTATUS cli_tree_full_connection(struct cli_tree **ret_tree,
 177                                   const char *my_name,
 178                                   const char *dest_host, int port,
 179                                   const char *service, const char *service_type,
 180                                   const char *user, const char *domain,
 181                                   const char *password)
 182 {
 183         struct cli_socket *sock;
 184         struct cli_transport *transport;
 185         struct cli_session *session;
 186         struct cli_tree *tree;
 187         NTSTATUS status;
 188         struct nmb_name calling;
 189         struct nmb_name called;
 190         union smb_sesssetup setup;
 191         union smb_tcon tcon;
 192         TALLOC_CTX *mem_ctx;
 193
 194         *ret_tree = NULL;
 195
 196         sock = cli_sock_init();
 197         if (!sock) {
 198                 return NT_STATUS_NO_MEMORY;
 199         }
 200
 201         /* open a TCP socket to the server */
 202         if (!cli_sock_connect_byname(sock, dest_host, port)) {
 203                 DEBUG(2,("Failed to establish socket connection - %s\n", strerror(errno)));
 204                 return NT_STATUS_UNSUCCESSFUL;
 205         }
 206
 207         transport = cli_transport_init(sock);
 208         if (!transport) {
 209                 cli_sock_close(sock);
 210                 return NT_STATUS_NO_MEMORY;
 211         }
 212
 213         /* send a NBT session request, if applicable */
 214         make_nmb_name(&calling, my_name, 0x0);
 215         make_nmb_name(&called,  dest_host, 0x20);
 216
 217         if (!cli_transport_connect(transport, &calling, &called)) {
 218                 cli_transport_close(transport);
 219                 return NT_STATUS_UNSUCCESSFUL;
 220         }
 221
 222
 223         /* negotiate protocol options with the server */
 224         status = smb_raw_negotiate(transport);
 225         if (!NT_STATUS_IS_OK(status)) {
 226                 cli_transport_close(transport);
 227                 return status;
 228         }
 229
 230         session = cli_session_init(transport);
 231         if (!session) {
 232                 cli_transport_close(transport);
 233                 return NT_STATUS_NO_MEMORY;
 234         }
 235
 236         /* prepare a session setup to establish a security context */
 237         setup.generic.level = RAW_SESSSETUP_GENERIC;
 238         setup.generic.in.sesskey = transport->negotiate.sesskey;
 239         setup.generic.in.capabilities = CAP_UNICODE | CAP_STATUS32 |
 240                 CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
 241                 CAP_W2K_SMBS | CAP_LARGE_READX | CAP_LARGE_WRITEX;
 242         setup.generic.in.password = password;
 243         setup.generic.in.user = user;
 244         setup.generic.in.domain = domain;
 245
 246         mem_ctx = talloc_init("tcon");
 247         if (!mem_ctx) {
 248                 cli_tree_close(tree);
 249                 return NT_STATUS_NO_MEMORY;
 250         }
 251
 252         status = smb_raw_session_setup(session, mem_ctx, &setup);
 253         if (!NT_STATUS_IS_OK(status)) {
 254                 cli_session_close(session);
 255                 talloc_destroy(mem_ctx);
 256                 return status;
 257         }
 258
 259         session->vuid = setup.generic.out.vuid;
 260
 261         tree = cli_tree_init(session);
 262         if (!tree) {
 263                 cli_session_close(session);
 264                 talloc_destroy(mem_ctx);
 265                 return NT_STATUS_NO_MEMORY;
 266         }
 267
 268         /* connect to a share using a tree connect */
 269         tcon.generic.level = RAW_TCON_TCONX;
 270         tcon.tconx.in.flags = 0;
 271         tcon.tconx.in.password = data_blob(NULL, 0);
 272         tcon.tconx.in.path = service;
 273         tcon.tconx.in.device = service_type;
 274
 275         status = smb_tree_connect(tree, mem_ctx, &tcon);
 276         if (!NT_STATUS_IS_OK(status)) {
 277                 cli_tree_close(tree);
 278                 talloc_destroy(mem_ctx);
 279                 return status;
 280         }
 281
 282         tree->tid = tcon.tconx.out.cnum;
 283         tree->device = talloc_strdup(tree->mem_ctx, tcon.tconx.out.dev_type);
 284         tree->fs_type = talloc_strdup(tree->mem_ctx, tcon.tconx.out.fs_type);
 285
 286         talloc_destroy(mem_ctx);
 287
 288         *ret_tree = tree;
 289         return NT_STATUS_OK;
 290 }