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/*
Unix SMB/Netbios implementation.
Version 3.0
client transaction calls
Copyright (C) Andrew Tridgell 1994-1998
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define NO_SYSLOG
#include "includes.h"
/****************************************************************************
send a SMB trans or trans2 request
****************************************************************************/
BOOL cli_send_trans(struct cli_state *cli, int trans,
char *name, int pipe_name_len,
int fid, int flags,
uint16 *setup, int lsetup, int msetup,
char *param, int lparam, int mparam,
char *data, int ldata, int mdata)
{
int i;
int this_ldata,this_lparam;
int tot_data=0,tot_param=0;
char *outdata,*outparam;
char *p;
this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
memset(cli->outbuf,'\0',smb_size);
set_message(cli->outbuf,14+lsetup,0,True);
CVAL(cli->outbuf,smb_com) = trans;
SSVAL(cli->outbuf,smb_tid, cli->cnum);
cli_setup_packet(cli);
outparam = smb_buf(cli->outbuf)+(trans==SMBtrans ? pipe_name_len+1 : 3);
outdata = outparam+this_lparam;
/* primary request */
SSVAL(cli->outbuf,smb_tpscnt,lparam); /* tpscnt */
SSVAL(cli->outbuf,smb_tdscnt,ldata); /* tdscnt */
SSVAL(cli->outbuf,smb_mprcnt,mparam); /* mprcnt */
SSVAL(cli->outbuf,smb_mdrcnt,mdata); /* mdrcnt */
SCVAL(cli->outbuf,smb_msrcnt,msetup); /* msrcnt */
SSVAL(cli->outbuf,smb_flags,flags); /* flags */
SIVAL(cli->outbuf,smb_timeout,0); /* timeout */
SSVAL(cli->outbuf,smb_pscnt,this_lparam); /* pscnt */
SSVAL(cli->outbuf,smb_psoff,smb_offset(outparam,cli->outbuf)); /* psoff */
SSVAL(cli->outbuf,smb_dscnt,this_ldata); /* dscnt */
SSVAL(cli->outbuf,smb_dsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
SCVAL(cli->outbuf,smb_suwcnt,lsetup); /* suwcnt */
for (i=0;i<lsetup;i++) /* setup[] */
SSVAL(cli->outbuf,smb_setup+i*2,setup[i]);
p = smb_buf(cli->outbuf);
if (trans==SMBtrans) {
memcpy(p,name, pipe_name_len + 1); /* name[] */
} else {
*p++ = 0; /* put in a null smb_name */
*p++ = 'D'; *p++ = ' '; /* observed in OS/2 */
}
if (this_lparam) /* param[] */
memcpy(outparam,param,this_lparam);
if (this_ldata) /* data[] */
memcpy(outdata,data,this_ldata);
set_message(cli->outbuf,14+lsetup, /* wcnt, bcc */
PTR_DIFF(outdata+this_ldata,smb_buf(cli->outbuf)),False);
show_msg(cli->outbuf);
cli_send_smb(cli);
if (this_ldata < ldata || this_lparam < lparam) {
/* receive interim response */
if (!cli_receive_smb(cli) ||
CVAL(cli->inbuf,smb_rcls) != 0) {
return(False);
}
tot_data = this_ldata;
tot_param = this_lparam;
while (tot_data < ldata || tot_param < lparam) {
this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
CVAL(cli->outbuf,smb_com) = trans==SMBtrans ? SMBtranss : SMBtranss2;
outparam = smb_buf(cli->outbuf);
outdata = outparam+this_lparam;
/* secondary request */
SSVAL(cli->outbuf,smb_tpscnt,lparam); /* tpscnt */
SSVAL(cli->outbuf,smb_tdscnt,ldata); /* tdscnt */
SSVAL(cli->outbuf,smb_spscnt,this_lparam); /* pscnt */
SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
SSVAL(cli->outbuf,smb_spsdisp,tot_param); /* psdisp */
SSVAL(cli->outbuf,smb_sdscnt,this_ldata); /* dscnt */
SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
SSVAL(cli->outbuf,smb_sdsdisp,tot_data); /* dsdisp */
if (trans==SMBtrans2)
SSVALS(cli->outbuf,smb_sfid,fid); /* fid */
if (this_lparam) /* param[] */
memcpy(outparam,param+tot_param,this_lparam);
if (this_ldata) /* data[] */
memcpy(outdata,data+tot_data,this_ldata);
set_message(cli->outbuf,trans==SMBtrans?8:9, /* wcnt, bcc */
PTR_DIFF(outdata+this_ldata,smb_buf(cli->outbuf)),False);
show_msg(cli->outbuf);
cli_send_smb(cli);
tot_data += this_ldata;
tot_param += this_lparam;
}
}
return(True);
}
/****************************************************************************
receive a SMB trans or trans2 response allocating the necessary memory
****************************************************************************/
BOOL cli_receive_trans(struct cli_state *cli,int trans,
char **param, int *param_len,
char **data, int *data_len)
{
int total_data=0;
int total_param=0;
int this_data,this_param;
uint8 eclass;
uint32 ecode;
*data_len = *param_len = 0;
if (!cli_receive_smb(cli))
return False;
show_msg(cli->inbuf);
/* sanity check */
if (CVAL(cli->inbuf,smb_com) != trans) {
DEBUG(0,("Expected %s response, got command 0x%02x\n",
trans==SMBtrans?"SMBtrans":"SMBtrans2",
CVAL(cli->inbuf,smb_com)));
return(False);
}
/*
* An NT RPC pipe call can return ERRDOS, ERRmoredata
* to a trans call. This is not an error and should not
* be treated as such.
*/
if (cli_error(cli, &eclass, &ecode, NULL))
{
if(cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata))
return(False);
}
/* parse out the lengths */
total_data = SVAL(cli->inbuf,smb_tdrcnt);
total_param = SVAL(cli->inbuf,smb_tprcnt);
/* allocate it */
*data = Realloc(*data,total_data);
*param = Realloc(*param,total_param);
while (1) {
this_data = SVAL(cli->inbuf,smb_drcnt);
this_param = SVAL(cli->inbuf,smb_prcnt);
if (this_data + *data_len > total_data ||
this_param + *param_len > total_param) {
DEBUG(1,("Data overflow in cli_receive_trans\n"));
return False;
}
if (this_data)
memcpy(*data + SVAL(cli->inbuf,smb_drdisp),
smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_droff),
this_data);
if (this_param)
memcpy(*param + SVAL(cli->inbuf,smb_prdisp),
smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_proff),
this_param);
*data_len += this_data;
*param_len += this_param;
/* parse out the total lengths again - they can shrink! */
total_data = SVAL(cli->inbuf,smb_tdrcnt);
total_param = SVAL(cli->inbuf,smb_tprcnt);
if (total_data <= *data_len && total_param <= *param_len)
break;
if (!cli_receive_smb(cli))
return False;
show_msg(cli->inbuf);
/* sanity check */
if (CVAL(cli->inbuf,smb_com) != trans) {
DEBUG(0,("Expected %s response, got command 0x%02x\n",
trans==SMBtrans?"SMBtrans":"SMBtrans2",
CVAL(cli->inbuf,smb_com)));
return(False);
}
if (cli_error(cli, &eclass, &ecode, NULL))
{
if(cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata))
return(False);
}
}
return(True);
}
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