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/*
Unix SMB/Netbios implementation.
Version 1.9.
Inter-process communication and named pipe handling
Copyright (C) Andrew Tridgell 1992-1998
SMB Version handling
Copyright (C) John H Terpstra 1995-1998
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.
*/
/*
This file handles the named pipe and mailslot calls
in the SMBtrans protocol
*/
#include "includes.h"
extern int DEBUGLEVEL;
extern int max_send;
extern fstring local_machine;
#define NERR_notsupported 50
extern int smb_read_error;
/*******************************************************************
copies parameters and data, as needed, into the smb buffer
*both* the data and params sections should be aligned. this
is fudged in the rpc pipes by
at present, only the data section is. this may be a possible
cause of some of the ipc problems being experienced. lkcl26dec97
******************************************************************/
static void copy_trans_params_and_data(char *outbuf, int align,
char *rparam, int param_offset, int param_len,
char *rdata, int data_offset, int data_len)
{
char *copy_into = smb_buf(outbuf)+1;
if(param_len < 0)
param_len = 0;
if(data_len < 0)
data_len = 0;
DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d]\n",
param_offset, param_offset + param_len,
data_offset , data_offset + data_len));
if (param_len)
memcpy(copy_into, &rparam[param_offset], param_len);
copy_into += param_len + align;
if (data_len )
memcpy(copy_into, &rdata[data_offset], data_len);
}
/****************************************************************************
Send a trans reply.
****************************************************************************/
void send_trans_reply(char *outbuf,
char *rparam, int rparam_len,
char *rdata, int rdata_len,
BOOL buffer_too_large)
{
int this_ldata,this_lparam;
int tot_data_sent = 0;
int tot_param_sent = 0;
int align;
int ldata = rdata ? rdata_len : 0;
int lparam = rparam ? rparam_len : 0;
if (buffer_too_large)
DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
this_lparam = MIN(lparam,max_send - 500); /* hack */
this_ldata = MIN(ldata,max_send - (500+this_lparam));
align = ((this_lparam)%4);
set_message(outbuf,10,1+align+this_ldata+this_lparam,True);
if (buffer_too_large)
{
/* issue a buffer size warning. on a DCE/RPC pipe, expect an SMBreadX... */
SIVAL(outbuf, smb_flg2, FLAGS2_32_BIT_ERROR_CODES);
SIVAL(outbuf, smb_rcls, 0x80000000 | STATUS_BUFFER_OVERFLOW);
}
copy_trans_params_and_data(outbuf, align,
rparam, tot_param_sent, this_lparam,
rdata, tot_data_sent, this_ldata);
SSVAL(outbuf,smb_vwv0,lparam);
SSVAL(outbuf,smb_vwv1,ldata);
SSVAL(outbuf,smb_vwv3,this_lparam);
SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
SSVAL(outbuf,smb_vwv5,0);
SSVAL(outbuf,smb_vwv6,this_ldata);
SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
SSVAL(outbuf,smb_vwv8,0);
SSVAL(outbuf,smb_vwv9,0);
show_msg(outbuf);
send_smb(smbd_server_fd(),outbuf);
tot_data_sent = this_ldata;
tot_param_sent = this_lparam;
while (tot_data_sent < ldata || tot_param_sent < lparam)
{
this_lparam = MIN(lparam-tot_param_sent, max_send - 500); /* hack */
this_ldata = MIN(ldata -tot_data_sent, max_send - (500+this_lparam));
if(this_lparam < 0)
this_lparam = 0;
if(this_ldata < 0)
this_ldata = 0;
align = (this_lparam%4);
set_message(outbuf,10,1+this_ldata+this_lparam+align,False);
copy_trans_params_and_data(outbuf, align,
rparam, tot_param_sent, this_lparam,
rdata, tot_data_sent, this_ldata);
SSVAL(outbuf,smb_vwv3,this_lparam);
SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
SSVAL(outbuf,smb_vwv5,tot_param_sent);
SSVAL(outbuf,smb_vwv6,this_ldata);
SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
SSVAL(outbuf,smb_vwv8,tot_data_sent);
SSVAL(outbuf,smb_vwv9,0);
show_msg(outbuf);
send_smb(smbd_server_fd(),outbuf);
tot_data_sent += this_ldata;
tot_param_sent += this_lparam;
}
}
/****************************************************************************
Start the first part of an RPC reply which began with an SMBtrans request.
****************************************************************************/
static BOOL api_rpc_trans_reply(char *outbuf, pipes_struct *p)
{
char *rdata = malloc(p->max_trans_reply);
int data_len;
if(rdata == NULL) {
DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
return False;
}
if((data_len = read_from_pipe( p, rdata, p->max_trans_reply)) < 0) {
free(rdata);
return False;
}
send_trans_reply(outbuf, NULL, 0, rdata, data_len, p->out_data.current_pdu_len > data_len);
free(rdata);
return True;
}
/****************************************************************************
WaitNamedPipeHandleState
****************************************************************************/
static BOOL api_WNPHS(char *outbuf, pipes_struct *p, char *param, int param_len)
{
uint16 priority;
if (!param || param_len < 2)
return False;
priority = SVAL(param,0);
DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
if (wait_rpc_pipe_hnd_state(p, priority)) {
/* now send the reply */
send_trans_reply(outbuf, NULL, 0, NULL, 0, False);
return True;
}
return False;
}
/****************************************************************************
SetNamedPipeHandleState
****************************************************************************/
static BOOL api_SNPHS(char *outbuf, pipes_struct *p, char *param, int param_len)
{
uint16 id;
if (!param || param_len < 2)
return False;
id = SVAL(param,0);
DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
if (set_rpc_pipe_hnd_state(p, id)) {
/* now send the reply */
send_trans_reply(outbuf, NULL, 0, NULL, 0, False);
return True;
}
return False;
}
/****************************************************************************
When no reply is generated, indicate unsupported.
****************************************************************************/
static BOOL api_no_reply(char *outbuf, int max_rdata_len)
{
char rparam[4];
/* unsupported */
SSVAL(rparam,0,NERR_notsupported);
SSVAL(rparam,2,0); /* converter word */
DEBUG(3,("Unsupported API fd command\n"));
/* now send the reply */
send_trans_reply(outbuf, rparam, 4, NULL, 0, False);
return -1;
}
/****************************************************************************
Handle remote api calls delivered to a named pipe already opened.
****************************************************************************/
static int api_fd_reply(connection_struct *conn,uint16 vuid,char *outbuf,
uint16 *setup,char *data,char *params,
int suwcnt,int tdscnt,int tpscnt,int mdrcnt,int mprcnt)
{
BOOL reply = False;
pipes_struct *p = NULL;
int pnum;
int subcommand;
DEBUG(5,("api_fd_reply\n"));
/* First find out the name of this file. */
if (suwcnt != 2) {
DEBUG(0,("Unexpected named pipe transaction.\n"));
return(-1);
}
/* Get the file handle and hence the file name. */
/*
* NB. The setup array has already been transformed
* via SVAL and so is in gost byte order.
*/
pnum = ((int)setup[1]) & 0xFFFF;
subcommand = ((int)setup[0]) & 0xFFFF;
if(!(p = get_rpc_pipe(pnum))) {
DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
return api_no_reply(outbuf, mdrcnt);
}
DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)", subcommand, p->name, pnum));
/* record maximum data length that can be transmitted in an SMBtrans */
p->max_trans_reply = mdrcnt;
DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
switch (subcommand) {
case 0x26:
/* dce/rpc command */
reply = write_to_pipe(p, data, tdscnt);
if (reply)
reply = api_rpc_trans_reply(outbuf, p);
break;
case 0x53:
/* Wait Named Pipe Handle state */
reply = api_WNPHS(outbuf, p, params, tpscnt);
break;
case 0x01:
/* Set Named Pipe Handle state */
reply = api_SNPHS(outbuf, p, params, tpscnt);
break;
}
if (!reply)
return api_no_reply(outbuf, mdrcnt);
return -1;
}
/****************************************************************************
handle named pipe commands
****************************************************************************/
static int named_pipe(connection_struct *conn,uint16 vuid, char *outbuf,char *name,
uint16 *setup,char *data,char *params,
int suwcnt,int tdscnt,int tpscnt,
int msrcnt,int mdrcnt,int mprcnt)
{
DEBUG(3,("named pipe command on <%s> name\n", name));
if (strequal(name,"LANMAN"))
return api_reply(conn,vuid,outbuf,data,params,tdscnt,tpscnt,mdrcnt,mprcnt);
if (strequal(name,"WKSSVC") ||
strequal(name,"SRVSVC") ||
strequal(name,"WINREG") ||
strequal(name,"SAMR") ||
strequal(name,"LSARPC"))
{
DEBUG(4,("named pipe command from Win95 (wow!)\n"));
return api_fd_reply(conn,vuid,outbuf,setup,data,params,suwcnt,tdscnt,tpscnt,mdrcnt,mprcnt);
}
if (strlen(name) < 1)
return api_fd_reply(conn,vuid,outbuf,setup,data,params,suwcnt,tdscnt,tpscnt,mdrcnt,mprcnt);
if (setup)
DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n", (int)setup[0],(int)setup[1]));
return 0;
}
/****************************************************************************
Reply to a SMBtrans.
****************************************************************************/
int reply_trans(connection_struct *conn, char *inbuf,char *outbuf, int size, int bufsize)
{
fstring name;
int name_offset = 0;
char *data=NULL,*params=NULL;
uint16 *setup=NULL;
int outsize = 0;
uint16 vuid = SVAL(inbuf,smb_uid);
int tpscnt = SVAL(inbuf,smb_vwv0);
int tdscnt = SVAL(inbuf,smb_vwv1);
int mprcnt = SVAL(inbuf,smb_vwv2);
int mdrcnt = SVAL(inbuf,smb_vwv3);
int msrcnt = CVAL(inbuf,smb_vwv4);
BOOL close_on_completion = BITSETW(inbuf+smb_vwv5,0);
BOOL one_way = BITSETW(inbuf+smb_vwv5,1);
int pscnt = SVAL(inbuf,smb_vwv9);
int psoff = SVAL(inbuf,smb_vwv10);
int dscnt = SVAL(inbuf,smb_vwv11);
int dsoff = SVAL(inbuf,smb_vwv12);
int suwcnt = CVAL(inbuf,smb_vwv13);
START_PROFILE(SMBtrans);
memset(name, '\0',sizeof(name));
fstrcpy(name,smb_buf(inbuf));
if (dscnt > tdscnt || pscnt > tpscnt) {
exit_server("invalid trans parameters\n");
}
if (tdscnt) {
if((data = (char *)malloc(tdscnt)) == NULL) {
DEBUG(0,("reply_trans: data malloc fail for %d bytes !\n", tdscnt));
END_PROFILE(SMBtrans);
return(ERROR(ERRDOS,ERRnomem));
}
memcpy(data,smb_base(inbuf)+dsoff,dscnt);
}
if (tpscnt) {
if((params = (char *)malloc(tpscnt)) == NULL) {
DEBUG(0,("reply_trans: param malloc fail for %d bytes !\n", tpscnt));
END_PROFILE(SMBtrans);
return(ERROR(ERRDOS,ERRnomem));
}
memcpy(params,smb_base(inbuf)+psoff,pscnt);
}
if (suwcnt) {
int i;
if((setup = (uint16 *)malloc(suwcnt*sizeof(uint16))) == NULL) {
DEBUG(0,("reply_trans: setup malloc fail for %d bytes !\n", (int)(suwcnt * sizeof(uint16))));
END_PROFILE(SMBtrans);
return(ERROR(ERRDOS,ERRnomem));
}
for (i=0;i<suwcnt;i++)
setup[i] = SVAL(inbuf,smb_vwv14+i*SIZEOFWORD);
}
if (pscnt < tpscnt || dscnt < tdscnt) {
/* We need to send an interim response then receive the rest
of the parameter/data bytes */
outsize = set_message(outbuf,0,0,True);
show_msg(outbuf);
send_smb(smbd_server_fd(),outbuf);
}
/* receive the rest of the trans packet */
while (pscnt < tpscnt || dscnt < tdscnt) {
BOOL ret;
int pcnt,poff,dcnt,doff,pdisp,ddisp;
ret = receive_next_smb(inbuf,bufsize,SMB_SECONDARY_WAIT);
if ((ret && (CVAL(inbuf, smb_com) != SMBtranss)) || !ret) {
if(ret) {
DEBUG(0,("reply_trans: Invalid secondary trans packet\n"));
} else {
DEBUG(0,("reply_trans: %s in getting secondary trans response.\n",
(smb_read_error == READ_ERROR) ? "error" : "timeout" ));
}
if (params)
free(params);
if (data)
free(data);
if (setup)
free(setup);
END_PROFILE(SMBtrans);
return(ERROR(ERRSRV,ERRerror));
}
show_msg(inbuf);
tpscnt = SVAL(inbuf,smb_vwv0);
tdscnt = SVAL(inbuf,smb_vwv1);
pcnt = SVAL(inbuf,smb_vwv2);
poff = SVAL(inbuf,smb_vwv3);
pdisp = SVAL(inbuf,smb_vwv4);
dcnt = SVAL(inbuf,smb_vwv5);
doff = SVAL(inbuf,smb_vwv6);
ddisp = SVAL(inbuf,smb_vwv7);
pscnt += pcnt;
dscnt += dcnt;
if (dscnt > tdscnt || pscnt > tpscnt) {
exit_server("invalid trans parameters\n");
}
if (pcnt)
memcpy(params+pdisp,smb_base(inbuf)+poff,pcnt);
if (dcnt)
memcpy(data+ddisp,smb_base(inbuf)+doff,dcnt);
}
DEBUG(3,("trans <%s> data=%d params=%d setup=%d\n",
name,tdscnt,tpscnt,suwcnt));
/*
* WinCE wierdness....
*/
if (name[0] == '\\' && (StrnCaseCmp(&name[1],local_machine, strlen(local_machine)) == 0) &&
(name[strlen(local_machine)+1] == '\\'))
name_offset = strlen(local_machine)+1;
if (strncmp(&name[name_offset],"\\PIPE\\",strlen("\\PIPE\\")) == 0) {
DEBUG(5,("calling named_pipe\n"));
outsize = named_pipe(conn,vuid,outbuf,
name+name_offset+strlen("\\PIPE\\"),setup,data,params,
suwcnt,tdscnt,tpscnt,msrcnt,mdrcnt,mprcnt);
} else {
DEBUG(3,("invalid pipe name\n"));
outsize = 0;
}
if (data)
free(data);
if (params)
free(params);
if (setup)
free(setup);
if (close_on_completion)
close_cnum(conn,vuid);
if (one_way) {
END_PROFILE(SMBtrans);
return(-1);
}
if (outsize == 0) {
END_PROFILE(SMBtrans);
return(ERROR(ERRSRV,ERRnosupport));
}
END_PROFILE(SMBtrans);
return(outsize);
}
|