source3/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 extern int DEBUGLEVEL;
  28
  29 /*
  30  * Change the port number used to call on
  31  */
  32 int cli_set_port(struct cli_state *cli, int port)
  33 {
  34         cli->port = port;
  35         return port;
  36 }
  37
  38 /****************************************************************************
  39 recv an smb
  40 ****************************************************************************/
  41 BOOL cli_receive_smb(struct cli_state *cli)
  42 {
  43         BOOL ret;
  44  again:
  45         ret = client_receive_smb(cli->fd,cli->inbuf,cli->timeout);
  46
  47         if (ret) {
  48                 /* it might be an oplock break request */
  49                 if (!(CVAL(cli->inbuf, smb_flg) & FLAG_REPLY) &&
  50                     CVAL(cli->inbuf,smb_com) == SMBlockingX &&
  51                     SVAL(cli->inbuf,smb_vwv6) == 0 &&
  52                     SVAL(cli->inbuf,smb_vwv7) == 0) {
  53                         if (cli->oplock_handler) {
  54                                 int fnum = SVAL(cli->inbuf,smb_vwv2);
  55                                 unsigned char level = CVAL(cli->inbuf,smb_vwv3+1);
  56                                 if (!cli->oplock_handler(cli, fnum, level)) return False;
  57                         }
  58                         /* try to prevent loops */
  59                         CVAL(cli->inbuf,smb_com) = 0xFF;
  60                         goto again;
  61                 }
  62         }
  63
  64         return ret;
  65 }
  66
  67 /****************************************************************************
  68   send an smb to a fd and re-establish if necessary
  69 ****************************************************************************/
  70 BOOL cli_send_smb(struct cli_state *cli)
  71 {
  72         size_t len;
  73         size_t nwritten=0;
  74         ssize_t ret;
  75         BOOL reestablished=False;
  76
  77         len = smb_len(cli->outbuf) + 4;
  78
  79         while (nwritten < len) {
  80                 ret = write_socket(cli->fd,cli->outbuf+nwritten,len - nwritten);
  81                 if (ret <= 0 && errno == EPIPE && !reestablished) {
  82                         if (cli_reestablish_connection(cli)) {
  83                                 reestablished = True;
  84                                 nwritten=0;
  85                                 continue;
  86                         }
  87                 }
  88                 if (ret <= 0) {
  89                         DEBUG(0,("Error writing %d bytes to client. %d\n",
  90                                  (int)len,(int)ret));
  91                         return False;
  92                 }
  93                 nwritten += ret;
  94         }
  95
  96         return True;
  97 }
  98
  99 /****************************************************************************
 100 setup basics in a outgoing packet
 101 ****************************************************************************/
 102 void cli_setup_packet(struct cli_state *cli)
 103 {
 104         cli->rap_error = 0;
 105         SSVAL(cli->outbuf,smb_pid,cli->pid);
 106         SSVAL(cli->outbuf,smb_uid,cli->vuid);
 107         SSVAL(cli->outbuf,smb_mid,cli->mid);
 108         if (cli->protocol > PROTOCOL_CORE) {
 109                 uint16 flags2;
 110                 SCVAL(cli->outbuf,smb_flg,0x8);
 111                 flags2 = FLAGS2_LONG_PATH_COMPONENTS;
 112                 if (cli->capabilities & CAP_UNICODE) {
 113                         flags2 |= FLAGS2_UNICODE_STRINGS;
 114                 }
 115                 if (cli->capabilities & CAP_STATUS32) {
 116                         flags2 |= FLAGS2_32_BIT_ERROR_CODES;
 117                 }
 118                 SSVAL(cli->outbuf,smb_flg2, flags2);
 119         }
 120 }
 121
 122 /****************************************************************************
 123 setup the bcc length of the packet from a pointer to the end of the data
 124 ****************************************************************************/
 125 void cli_setup_bcc(struct cli_state *cli, void *p)
 126 {
 127         set_message_bcc(cli->outbuf, PTR_DIFF(p, smb_buf(cli->outbuf)));
 128 }
 129
 130
 131
 132 /****************************************************************************
 133 initialise a client structure
 134 ****************************************************************************/
 135 void cli_init_creds(struct cli_state *cli, const struct ntuser_creds *usr)
 136 {
 137         /* copy_nt_creds(&cli->usr, usr); */
 138         safe_strcpy(cli->domain   , usr->domain   , sizeof(usr->domain   )-1);
 139         safe_strcpy(cli->user_name, usr->user_name, sizeof(usr->user_name)-1);
 140         memcpy(&cli->pwd, &usr->pwd, sizeof(usr->pwd));
 141         cli->ntlmssp_flags = usr->ntlmssp_flags;
 142         cli->ntlmssp_cli_flgs = usr != NULL ? usr->ntlmssp_flags : 0;
 143
 144         DEBUG(10,("cli_init_creds: user %s domain %s flgs: %x\nntlmssp_cli_flgs:%x\n",
 145                cli->user_name, cli->domain,
 146                cli->ntlmssp_flags,cli->ntlmssp_cli_flgs));
 147 }
 148
 149
 150 /****************************************************************************
 151 initialise a client structure
 152 ****************************************************************************/
 153 struct cli_state *cli_initialise(struct cli_state *cli)
 154 {
 155         BOOL alloced_cli = False;
 156
 157         if (!cli) {
 158                 cli = (struct cli_state *)malloc(sizeof(*cli));
 159                 if (!cli)
 160                         return NULL;
 161                 ZERO_STRUCTP(cli);
 162                 alloced_cli = True;
 163         }
 164
 165         if (cli->initialised) {
 166                 cli_shutdown(cli);
 167         }
 168
 169         ZERO_STRUCTP(cli);
 170
 171         cli->port = 0;
 172         cli->fd = -1;
 173         cli->cnum = -1;
 174         cli->pid = (uint16)sys_getpid();
 175         cli->mid = 1;
 176         cli->vuid = UID_FIELD_INVALID;
 177         cli->protocol = PROTOCOL_NT1;
 178         cli->timeout = 20000; /* Timeout is in milliseconds. */
 179         cli->bufsize = CLI_BUFFER_SIZE+4;
 180         cli->max_xmit = cli->bufsize;
 181         cli->outbuf = (char *)malloc(cli->bufsize);
 182         cli->inbuf = (char *)malloc(cli->bufsize);
 183         cli->oplock_handler = cli_oplock_ack;
 184
 185         if (!cli->outbuf || !cli->inbuf)
 186                 goto error;
 187
 188         if ((cli->mem_ctx = talloc_init()) == NULL)
 189                 goto error;
 190
 191         memset(cli->outbuf, 0, cli->bufsize);
 192         memset(cli->inbuf, 0, cli->bufsize);
 193
 194         cli->nt_pipe_fnum = 0;
 195
 196         cli->initialised = 1;
 197
 198         return cli;
 199
 200         /* Clean up after malloc() error */
 201
 202  error:
 203
 204         SAFE_FREE(cli->inbuf);
 205         SAFE_FREE(cli->outbuf);
 206
 207         if (alloced_cli)
 208                 SAFE_FREE(cli);
 209
 210         return NULL;
 211 }
 212
 213 /****************************************************************************
 214 shutdown a client structure
 215 ****************************************************************************/
 216 void cli_shutdown(struct cli_state *cli)
 217 {
 218         SAFE_FREE(cli->outbuf);
 219         SAFE_FREE(cli->inbuf);
 220
 221         if (cli->mem_ctx)
 222                 talloc_destroy(cli->mem_ctx);
 223
 224 #ifdef WITH_SSL
 225     if (cli->fd != -1)
 226       sslutil_disconnect(cli->fd);
 227 #endif /* WITH_SSL */
 228         if (cli->fd != -1)
 229       close(cli->fd);
 230         memset(cli, 0, sizeof(*cli));
 231 }
 232
 233
 234 /****************************************************************************
 235 set socket options on a open connection
 236 ****************************************************************************/
 237 void cli_sockopt(struct cli_state *cli, char *options)
 238 {
 239         set_socket_options(cli->fd, options);
 240 }
 241
 242 /****************************************************************************
 243 set the PID to use for smb messages. Return the old pid.
 244 ****************************************************************************/
 245 uint16 cli_setpid(struct cli_state *cli, uint16 pid)
 246 {
 247         uint16 ret = cli->pid;
 248         cli->pid = pid;
 249         return ret;
 250 }
 251