source/libsmb/clientgen.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    SMB client generic functions
   5    Copyright (C) Andrew Tridgell 1994-1998
   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 #define NO_SYSLOG
  23
  24 #include "includes.h"
  25
  26 /*
  27  * Change the port number used to call on
  28  */
  29 int cli_set_port(struct cli_state *cli, int port)
  30 {
  31         cli->port = port;
  32         return port;
  33 }
  34
  35 /****************************************************************************
  36 recv an smb
  37 ****************************************************************************/
  38 BOOL cli_receive_smb(struct cli_state *cli)
  39 {
  40         BOOL ret;
  41
  42         /* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
  43         if (cli->fd == -1) return False;
  44
  45  again:
  46         ret = client_receive_smb(cli->fd,cli->inbuf,cli->timeout);
  47
  48         if (ret) {
  49                 /* it might be an oplock break request */
  50                 if (!(CVAL(cli->inbuf, smb_flg) & FLAG_REPLY) &&
  51                     CVAL(cli->inbuf,smb_com) == SMBlockingX &&
  52                     SVAL(cli->inbuf,smb_vwv6) == 0 &&
  53                     SVAL(cli->inbuf,smb_vwv7) == 0) {
  54                         if (cli->oplock_handler) {
  55                                 int fnum = SVAL(cli->inbuf,smb_vwv2);
  56                                 unsigned char level = CVAL(cli->inbuf,smb_vwv3+1);
  57                                 if (!cli->oplock_handler(cli, fnum, level)) return False;
  58                         }
  59                         /* try to prevent loops */
  60                         SCVAL(cli->inbuf,smb_com,0xFF);
  61                         goto again;
  62                 }
  63         }
  64
  65         /* If the server is not responding, note that now */
  66
  67         if (!ret) {
  68                 close(cli->fd);
  69                 cli->fd = -1;
  70         }
  71
  72         return ret;
  73 }
  74
  75 /****************************************************************************
  76   send an smb to a fd.
  77 ****************************************************************************/
  78
  79 BOOL cli_send_smb(struct cli_state *cli)
  80 {
  81         size_t len;
  82         size_t nwritten=0;
  83         ssize_t ret;
  84
  85         /* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
  86         if (cli->fd == -1) return False;
  87
  88         len = smb_len(cli->outbuf) + 4;
  89
  90         while (nwritten < len) {
  91                 ret = write_socket(cli->fd,cli->outbuf+nwritten,len - nwritten);
  92                 if (ret <= 0) {
  93                         close(cli->fd);
  94                         cli->fd = -1;
  95                         DEBUG(0,("Error writing %d bytes to client. %d\n",
  96                                  (int)len,(int)ret));
  97                         return False;
  98                 }
  99                 nwritten += ret;
 100         }
 101
 102         return True;
 103 }
 104
 105 /****************************************************************************
 106 setup basics in a outgoing packet
 107 ****************************************************************************/
 108 void cli_setup_packet(struct cli_state *cli)
 109 {
 110         cli->rap_error = 0;
 111         SSVAL(cli->outbuf,smb_pid,cli->pid);
 112         SSVAL(cli->outbuf,smb_uid,cli->vuid);
 113         SSVAL(cli->outbuf,smb_mid,cli->mid);
 114         if (cli->protocol > PROTOCOL_CORE) {
 115                 uint16 flags2;
 116                 SCVAL(cli->outbuf,smb_flg,0x8);
 117                 flags2 = FLAGS2_LONG_PATH_COMPONENTS;
 118                 if (cli->capabilities & CAP_UNICODE) {
 119                         flags2 |= FLAGS2_UNICODE_STRINGS;
 120                 }
 121                 if (cli->capabilities & CAP_STATUS32) {
 122                         flags2 |= FLAGS2_32_BIT_ERROR_CODES;
 123                 }
 124                 if (cli->use_spnego) {
 125                         flags2 |= FLAGS2_EXTENDED_SECURITY;
 126                 }
 127                 SSVAL(cli->outbuf,smb_flg2, flags2);
 128         }
 129 }
 130
 131 /****************************************************************************
 132 setup the bcc length of the packet from a pointer to the end of the data
 133 ****************************************************************************/
 134 void cli_setup_bcc(struct cli_state *cli, void *p)
 135 {
 136         set_message_bcc(cli->outbuf, PTR_DIFF(p, smb_buf(cli->outbuf)));
 137 }
 138
 139
 140
 141 /****************************************************************************
 142 initialise a client structure
 143 ****************************************************************************/
 144 void cli_init_creds(struct cli_state *cli, const struct ntuser_creds *usr)
 145 {
 146         /* copy_nt_creds(&cli->usr, usr); */
 147         safe_strcpy(cli->domain   , usr->domain   , sizeof(usr->domain   )-1);
 148         safe_strcpy(cli->user_name, usr->user_name, sizeof(usr->user_name)-1);
 149         memcpy(&cli->pwd, &usr->pwd, sizeof(usr->pwd));
 150         cli->ntlmssp_flags = usr->ntlmssp_flags;
 151         cli->ntlmssp_cli_flgs = usr != NULL ? usr->ntlmssp_flags : 0;
 152
 153         DEBUG(10,("cli_init_creds: user %s domain %s flgs: %x\nntlmssp_cli_flgs:%x\n",
 154                cli->user_name, cli->domain,
 155                cli->ntlmssp_flags,cli->ntlmssp_cli_flgs));
 156 }
 157
 158
 159 /****************************************************************************
 160 initialise a client structure
 161 ****************************************************************************/
 162 struct cli_state *cli_initialise(struct cli_state *cli)
 163 {
 164         BOOL alloced_cli = False;
 165
 166         /* Check the effective uid - make sure we are not setuid */
 167         if (is_setuid_root()) {
 168                 DEBUG(0,("libsmb based programs must *NOT* be setuid root.\n"));
 169                 return NULL;
 170         }
 171
 172         if (!cli) {
 173                 cli = (struct cli_state *)malloc(sizeof(*cli));
 174                 if (!cli)
 175                         return NULL;
 176                 ZERO_STRUCTP(cli);
 177                 alloced_cli = True;
 178         }
 179
 180         if (cli->initialised) {
 181                 cli_shutdown(cli);
 182         }
 183
 184         ZERO_STRUCTP(cli);
 185
 186         cli->port = 0;
 187         cli->fd = -1;
 188         cli->cnum = -1;
 189         cli->pid = (uint16)sys_getpid();
 190         cli->mid = 1;
 191         cli->vuid = UID_FIELD_INVALID;
 192         cli->protocol = PROTOCOL_NT1;
 193         cli->timeout = 20000; /* Timeout is in milliseconds. */
 194         cli->bufsize = CLI_BUFFER_SIZE+4;
 195         cli->max_xmit = cli->bufsize;
 196         cli->outbuf = (char *)malloc(cli->bufsize);
 197         cli->inbuf = (char *)malloc(cli->bufsize);
 198         cli->oplock_handler = cli_oplock_ack;
 199         cli->use_spnego = True;
 200
 201         /* Set the CLI_FORCE_DOSERR environment variable to test
 202            client routines using DOS errors instead of STATUS32
 203            ones.  This intended only as a temporary hack. */
 204         if (getenv("CLI_FORCE_DOSERR")) {
 205                 cli->force_dos_errors = True;
 206         }
 207
 208         if (!cli->outbuf || !cli->inbuf)
 209                 goto error;
 210
 211         if ((cli->mem_ctx = talloc_init()) == NULL)
 212                 goto error;
 213
 214         memset(cli->outbuf, 0, cli->bufsize);
 215         memset(cli->inbuf, 0, cli->bufsize);
 216
 217         cli->nt_pipe_fnum = 0;
 218
 219         cli->initialised = 1;
 220         cli->allocated = alloced_cli;
 221
 222         return cli;
 223
 224         /* Clean up after malloc() error */
 225
 226  error:
 227
 228         SAFE_FREE(cli->inbuf);
 229         SAFE_FREE(cli->outbuf);
 230
 231         if (alloced_cli)
 232                 SAFE_FREE(cli);
 233
 234         return NULL;
 235 }
 236
 237 /****************************************************************************
 238 shutdown a client structure
 239 ****************************************************************************/
 240 void cli_shutdown(struct cli_state *cli)
 241 {
 242         BOOL allocated;
 243         SAFE_FREE(cli->outbuf);
 244         SAFE_FREE(cli->inbuf);
 245
 246         data_blob_free(&cli->secblob);
 247
 248         if (cli->mem_ctx)
 249                 talloc_destroy(cli->mem_ctx);
 250
 251 #ifdef WITH_SSL
 252         if (cli->fd != -1)
 253                 sslutil_disconnect(cli->fd);
 254 #endif /* WITH_SSL */
 255         if (cli->fd != -1)
 256                 close(cli->fd);
 257         allocated = cli->allocated;
 258         ZERO_STRUCTP(cli);
 259         if (allocated) {
 260                 free(cli);
 261         }
 262 }
 263
 264
 265 /****************************************************************************
 266 set socket options on a open connection
 267 ****************************************************************************/
 268 void cli_sockopt(struct cli_state *cli, char *options)
 269 {
 270         set_socket_options(cli->fd, options);
 271 }
 272
 273 /****************************************************************************
 274 set the PID to use for smb messages. Return the old pid.
 275 ****************************************************************************/
 276 uint16 cli_setpid(struct cli_state *cli, uint16 pid)
 277 {
 278         uint16 ret = cli->pid;
 279         cli->pid = pid;
 280         return ret;
 281 }