path: root/source3/smbd/pipes.c

/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   Pipe SMB reply routines
   Copyright (C) Andrew Tridgell 1992-1995
   
   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 reply_ calls on named pipes that the server
   makes to handle specific protocols
*/


#include "includes.h"
#include "trans2.h"

#define	PIPE		"\\PIPE\\"
#define	PIPELEN		strlen(PIPE)

#define REALLOC(ptr,size) Realloc(ptr,MAX((size),4*1024))

/* look in server.c for some explanation of these variables */
extern int Protocol;
extern int DEBUGLEVEL;
extern int chain_size;
extern int maxxmit;
extern int chain_fnum;
extern char magic_char;
extern connection_struct Connections[];
extern files_struct Files[];
extern BOOL case_sensitive;
extern pstring sesssetup_user;
extern int Client;

/* this macro should always be used to extract an fnum (smb_fid) from
a packet to ensure chaining works correctly */
#define GETFNUM(buf,where) (chain_fnum!= -1?chain_fnum:SVAL(buf,where))

char * known_pipes [] =
{
  "lsarpc",
  NULL
};

/****************************************************************************
  reply to an open and X on a named pipe

  In fact what we do is to open a regular file with the same name in
  /tmp. This can then be closed as normal. Reading and writing won't
  make much sense, but will do *something*. The real reason for this
  support is to be able to do transactions on them (well, on lsarpc
  for domain login purposes...).

  This code is basically stolen from reply_open_and_X with some
  wrinkles to handle pipes.
****************************************************************************/
int reply_open_pipe_and_X(char *inbuf,char *outbuf,int length,int bufsize)
{
  pstring fname;
  int cnum = SVAL(inbuf,smb_tid);
  int fnum = -1;
  int outsize = 0;
  int smb_com2 = CVAL(inbuf,smb_vwv0);
  int smb_off2 = SVAL(inbuf,smb_vwv1);
  int smb_mode = SVAL(inbuf,smb_vwv3);
  int smb_attr = SVAL(inbuf,smb_vwv5);
#if 0
  int open_flags = SVAL(inbuf,smb_vwv2);
  int smb_sattr = SVAL(inbuf,smb_vwv4); 
  uint32 smb_time = make_unix_date3(inbuf+smb_vwv6);
#endif
  int smb_ofun = SVAL(inbuf,smb_vwv8);
  int unixmode;
  int size=0,fmode=0,mtime=0,rmode=0;
  struct stat sbuf;
  int smb_action = 0;
  int i;

  /* XXXX we need to handle passed times, sattr and flags */
  strcpy(fname,smb_buf(inbuf));

  /* If the name doesn't start \PIPE\ then this is directed */
  /* at a mailslot or something we really, really don't understand, */
  /* not just something we really don't understand. */
  if ( strncmp(fname,PIPE,PIPELEN) != 0 )
    return(ERROR(ERRSRV,ERRaccess));

  DEBUG(4,("Opening pipe %s.\n", fname));

  /* Strip \PIPE\ off the name. */
  strcpy(fname,smb_buf(inbuf) + PIPELEN);

  /* See if it is one we want to handle. */
  for( i = 0; known_pipes[i] ; i++ )
    if( strcmp(fname,known_pipes[i]) == 0 )
      break;

  if ( known_pipes[i] == NULL )
    return(ERROR(ERRSRV,ERRaccess));

  /* Known pipes arrive with DIR attribs. Remove it so a regular file */
  /* can be opened and add it in after the open. */
  DEBUG(3,("Known pipe %s opening.\n",fname));
  smb_attr &= ~aDIR;
  Connections[cnum].read_only = 0;
  smb_ofun |= 0x10;		/* Add Create it not exists flag */

  unix_convert(fname,cnum);
    
  fnum = find_free_file();
  if (fnum < 0)
    return(ERROR(ERRSRV,ERRnofids));

  if (!check_name(fname,cnum))
    return(UNIXERROR(ERRDOS,ERRnoaccess));

  unixmode = unix_mode(cnum,smb_attr);
      
  open_file_shared(fnum,cnum,fname,smb_mode,smb_ofun,unixmode,
		   &rmode,&smb_action);
      
  if (!Files[fnum].open)
    return(UNIXERROR(ERRDOS,ERRnoaccess));

  if (fstat(Files[fnum].fd,&sbuf) != 0) {
    close_file(fnum);
    return(ERROR(ERRDOS,ERRnoaccess));
  }

  size = sbuf.st_size;
  fmode = dos_mode(cnum,fname,&sbuf);
  mtime = sbuf.st_mtime;
  if (fmode & aDIR) {
    close_file(fnum);
    return(ERROR(ERRDOS,ERRnoaccess));
  }

  /* Prepare the reply */
  outsize = set_message(outbuf,15,0,True);
  CVAL(outbuf,smb_vwv0) = smb_com2;

  /* Put things back the way they were. */
  Connections[cnum].read_only = 1;

  /* Mark the opened file as an existing named pipe in message mode. */
  SSVAL(outbuf,smb_vwv9,2);
  SSVAL(outbuf,smb_vwv10,0xc700);
  if (rmode == 2)
  {
    DEBUG(4,("Resetting open result to open from create.\n"));
    rmode = 1;
  }

  SSVAL(outbuf,smb_vwv1,(chain_size+outsize)-4);
  SSVAL(outbuf,smb_vwv2,fnum);
  SSVAL(outbuf,smb_vwv3,fmode);
  put_dos_date3(outbuf,smb_vwv4,mtime);
  SIVAL(outbuf,smb_vwv6,size);
  SSVAL(outbuf,smb_vwv8,rmode);
  SSVAL(outbuf,smb_vwv11,smb_action);

  chain_fnum = fnum;

  if (smb_com2 != 0xFF)
    outsize += chain_reply(smb_com2,inbuf,inbuf+smb_off2+4,
			   outbuf,outbuf+outsize,
			   length,bufsize);

  chain_fnum = -1;

  DEBUG(4,("Opened pipe %s with handle %d, saved name %s.\n",
	   fname, fnum, Files[fnum].name));
  
  return(outsize);
}


/****************************************************************************
 api_LsarpcSNPHS

 SetNamedPipeHandleState on \PIPE\lsarpc. We can't really do much here,
 so just blithely return True. This is really only for NT domain stuff,
 we we're only handling that - don't assume Samba now does complete
 named pipe handling.
****************************************************************************/
BOOL api_LsarpcSNPHS(int cnum,int uid, char *param,char *data,
		     int mdrcnt,int mprcnt,
		     char **rdata,char **rparam,
		     int *rdata_len,int *rparam_len)
{
  uint16 id;

  id = param[0] + (param[1] << 8);
  DEBUG(4,("lsarpc SetNamedPipeHandleState to code %x\n",id));
  return(True);
}


/****************************************************************************
 api_LsarpcTNP

 TransactNamedPipe on \PIPE\lsarpc.
****************************************************************************/
static void LsarpcTNP1(char *data,char **rdata, int *rdata_len)
{
  uint32 dword1, dword2;
  char pname[] = "\\PIPE\\lsass";

  /* All kinds of mysterious numbers here */
  *rdata_len = 68;
  *rdata = REALLOC(*rdata,*rdata_len);

  dword1 = IVAL(data,0xC);
  dword2 = IVAL(data,0x10);

  SIVAL(*rdata,0,0xc0005);
  SIVAL(*rdata,4,0x10);
  SIVAL(*rdata,8,0x44);
  SIVAL(*rdata,0xC,dword1);
  
  SIVAL(*rdata,0x10,dword2);
  SIVAL(*rdata,0x14,0x15);
  SSVAL(*rdata,0x18,sizeof(pname));
  strcpy(*rdata + 0x1a,pname);
  SIVAL(*rdata,0x28,1);
  memcpy(*rdata + 0x30, data + 0x34, 0x14);
}

static void LsarpcTNP2(char *data,char **rdata, int *rdata_len)
{
  uint32 dword1;

  /* All kinds of mysterious numbers here */
  *rdata_len = 48;
  *rdata = REALLOC(*rdata,*rdata_len);

  dword1 = IVAL(data,0xC);

  SIVAL(*rdata,0,0x03020005);
  SIVAL(*rdata,4,0x10);
  SIVAL(*rdata,8,0x30);
  SIVAL(*rdata,0xC,dword1);
  SIVAL(*rdata,0x10,0x18);
  SIVAL(*rdata,0x1c,0x44332211);
  SIVAL(*rdata,0x20,0x88776655);
  SIVAL(*rdata,0x24,0xCCBBAA99);
  SIVAL(*rdata,0x28,0x11FFEEDD);
}

static void LsarpcTNP3(char *data,char **rdata, int *rdata_len)
{
  uint32 dword1;
  uint16 word1;
  char * workgroup = lp_workgroup();
  int wglen = strlen(workgroup);
  int i;

  /* All kinds of mysterious numbers here */
  *rdata_len = 90 + 2 * wglen;
  *rdata = REALLOC(*rdata,*rdata_len);

  dword1 = IVAL(data,0xC);
  word1 = SVAL(data,0x2C);

  SIVAL(*rdata,0,0x03020005);
  SIVAL(*rdata,4,0x10);
  SIVAL(*rdata,8,0x60);
  SIVAL(*rdata,0xC,dword1);
  SIVAL(*rdata,0x10,0x48);
  SSVAL(*rdata,0x18,0x5988);	/* This changes */
  SSVAL(*rdata,0x1A,0x15);
  SSVAL(*rdata,0x1C,word1);
  SSVAL(*rdata,0x20,6);
  SSVAL(*rdata,0x22,8);
  SSVAL(*rdata,0x24,0x8E8);	/* So does this */
  SSVAL(*rdata,0x26,0x15);
  SSVAL(*rdata,0x28,0x4D48);	/* And this */
  SSVAL(*rdata,0x2A,0x15);
  SIVAL(*rdata,0x2C,4);
  SIVAL(*rdata,0x34,wglen);
  for ( i = 0 ; i < wglen ; i++ )
    (*rdata)[0x38 + i * 2] = workgroup[i];
   
  /* Now fill in the rest */
  i = 0x38 + wglen * 2;
  SSVAL(*rdata,i,0x648);
  SIVAL(*rdata,i+2,4);
  SIVAL(*rdata,i+6,0x401);
  SSVAL(*rdata,i+0xC,0x500);
  SIVAL(*rdata,i+0xE,0x15);
  SIVAL(*rdata,i+0x12,0x2372FE1);
  SIVAL(*rdata,i+0x16,0x7E831BEF);
  SIVAL(*rdata,i+0x1A,0x4B454B2);
}

static void LsarpcTNP4(char *data,char **rdata, int *rdata_len)
{
  uint32 dword1;

  /* All kinds of mysterious numbers here */
  *rdata_len = 48;
  *rdata = REALLOC(*rdata,*rdata_len);

  dword1 = IVAL(data,0xC);

  SIVAL(*rdata,0,0x03020005);
  SIVAL(*rdata,4,0x10);
  SIVAL(*rdata,8,0x30);
  SIVAL(*rdata,0xC,dword1);
  SIVAL(*rdata,0x10,0x18);
}


BOOL api_LsarpcTNP(int cnum,int uid, char *param,char *data,
		     int mdrcnt,int mprcnt,
		     char **rdata,char **rparam,
		     int *rdata_len,int *rparam_len)
{
  uint32 id,id2;

  id = IVAL(data,0);

  DEBUG(4,("lsarpc TransactNamedPipe id %lx\n",id));
  switch (id)
  {
    case 0xb0005:
      LsarpcTNP1(data,rdata,rdata_len);
      break;

    case 0x03000005:
      id2 = IVAL(data,8);
      DEBUG(4,("\t- Suboperation %lx\n",id2));
      switch (id2 & 0xF)
      {
        case 8:
          LsarpcTNP2(data,rdata,rdata_len);
          break;

        case 0xC:
          LsarpcTNP4(data,rdata,rdata_len);
          break;

        case 0xE:
          LsarpcTNP3(data,rdata,rdata_len);
          break;
      }
      break;
  }
  return(True);
}