source/smbd/pipes.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    Pipe SMB reply routines
   5    Copyright (C) Andrew Tridgell 1992-1998
   6    Copyright (C) Luke Kenneth Casson Leighton 1996-1998
   7    Copyright (C) Paul Ashton  1997-1998.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23 /*
  24    This file handles reply_ calls on named pipes that the server
  25    makes to handle specific protocols
  26 */
  27
  28
  29 #include "includes.h"
  30 #include "trans2.h"
  31
  32 #define PIPE            "\\PIPE\\"
  33 #define PIPELEN         strlen(PIPE)
  34
  35 extern int DEBUGLEVEL;
  36
  37 extern struct pipe_id_info pipe_names[];
  38
  39 /****************************************************************************
  40   reply to an open and X on a named pipe
  41
  42   This code is basically stolen from reply_open_and_X with some
  43   wrinkles to handle pipes.
  44 ****************************************************************************/
  45 int reply_open_pipe_and_X(connection_struct *conn,
  46                           char *inbuf,char *outbuf,int length,int bufsize)
  47 {
  48         pstring fname;
  49         uint16 vuid = SVAL(inbuf, smb_uid);
  50         pipes_struct *p;
  51         int smb_ofun = SVAL(inbuf,smb_vwv8);
  52         int size=0,fmode=0,mtime=0,rmode=0;
  53         int i;
  54
  55         /* XXXX we need to handle passed times, sattr and flags */
  56         pstrcpy(fname,smb_buf(inbuf));
  57
  58         /* If the name doesn't start \PIPE\ then this is directed */
  59         /* at a mailslot or something we really, really don't understand, */
  60         /* not just something we really don't understand. */
  61         if ( strncmp(fname,PIPE,PIPELEN) != 0 )
  62                 return(ERROR(ERRSRV,ERRaccess));
  63
  64         DEBUG(4,("Opening pipe %s.\n", fname));
  65
  66         /* See if it is one we want to handle. */
  67         for( i = 0; pipe_names[i].client_pipe ; i++ )
  68                 if( strequal(fname,pipe_names[i].client_pipe) )
  69                         break;
  70
  71         if (pipe_names[i].client_pipe == NULL)
  72                 return(ERROR(ERRSRV,ERRaccess));
  73
  74         /* Strip \PIPE\ off the name. */
  75         pstrcpy(fname,smb_buf(inbuf) + PIPELEN);
  76
  77         /* Known pipes arrive with DIR attribs. Remove it so a regular file */
  78         /* can be opened and add it in after the open. */
  79         DEBUG(3,("Known pipe %s opening.\n",fname));
  80         smb_ofun |= 0x10;               /* Add Create it not exists flag */
  81
  82         p = open_rpc_pipe_p(fname, conn, vuid);
  83         if (!p) return(ERROR(ERRSRV,ERRnofids));
  84
  85         /* Prepare the reply */
  86         set_message(outbuf,15,0,True);
  87
  88         /* Mark the opened file as an existing named pipe in message mode. */
  89         SSVAL(outbuf,smb_vwv9,2);
  90         SSVAL(outbuf,smb_vwv10,0xc700);
  91
  92         if (rmode == 2) {
  93                 DEBUG(4,("Resetting open result to open from create.\n"));
  94                 rmode = 1;
  95         }
  96
  97         SSVAL(outbuf,smb_vwv2, p->pnum);
  98         SSVAL(outbuf,smb_vwv3,fmode);
  99         put_dos_date3(outbuf,smb_vwv4,mtime);
 100         SIVAL(outbuf,smb_vwv6,size);
 101         SSVAL(outbuf,smb_vwv8,rmode);
 102         SSVAL(outbuf,smb_vwv11,0x0001);
 103
 104         return chain_reply(inbuf,outbuf,length,bufsize);
 105 }
 106
 107
 108 /****************************************************************************
 109   reply to a write and X
 110
 111   This code is basically stolen from reply_write_and_X with some
 112   wrinkles to handle pipes.
 113 ****************************************************************************/
 114 int reply_pipe_write_and_X(char *inbuf,char *outbuf,int length,int bufsize)
 115 {
 116         pipes_struct *p = get_rpc_pipe_p(inbuf,smb_vwv2);
 117         size_t numtowrite = SVAL(inbuf,smb_vwv10);
 118         int nwritten = -1;
 119         int smb_doff = SVAL(inbuf, smb_vwv11);
 120         char *data;
 121
 122         if (!p) return(ERROR(ERRDOS,ERRbadfid));
 123
 124         data = smb_base(inbuf) + smb_doff;
 125
 126         if (numtowrite == 0)
 127         {
 128                 nwritten = 0;
 129         }
 130         else
 131         {
 132                 nwritten = write_pipe(p, data, numtowrite);
 133         }
 134
 135         if ((nwritten == 0 && numtowrite != 0) || (nwritten < 0))
 136         {
 137                 return (UNIXERROR(ERRDOS,ERRnoaccess));
 138         }
 139
 140         set_message(outbuf,6,0,True);
 141
 142         SSVAL(outbuf,smb_vwv2,nwritten);
 143
 144         DEBUG(3,("writeX-IPC pnum=%04x nwritten=%d\n",
 145                  p->pnum, nwritten));
 146
 147         return chain_reply(inbuf,outbuf,length,bufsize);
 148 }
 149
 150 /****************************************************************************
 151   reply to a read and X
 152
 153   This code is basically stolen from reply_read_and_X with some
 154   wrinkles to handle pipes.
 155 ****************************************************************************/
 156 int reply_pipe_read_and_X(char *inbuf,char *outbuf,int length,int bufsize)
 157 {
 158         pipes_struct *p = get_rpc_pipe_p(inbuf,smb_vwv2);
 159         uint32 smb_offs = IVAL(inbuf,smb_vwv3);
 160         int smb_maxcnt = SVAL(inbuf,smb_vwv5);
 161         int smb_mincnt = SVAL(inbuf,smb_vwv6);
 162         int nread = -1;
 163         char *data;
 164
 165         if (!p) return(ERROR(ERRDOS,ERRbadfid));
 166
 167         set_message(outbuf,12,0,True);
 168         data = smb_buf(outbuf);
 169
 170         nread = read_pipe(p, data, smb_offs, smb_maxcnt);
 171
 172         if (nread < 0)
 173                 return(UNIXERROR(ERRDOS,ERRnoaccess));
 174
 175         SSVAL(outbuf,smb_vwv5,nread);
 176         SSVAL(outbuf,smb_vwv6,smb_offset(data,outbuf));
 177         SSVAL(smb_buf(outbuf),-2,nread);
 178
 179         DEBUG(3,("readX-IPC pnum=%04x min=%d max=%d nread=%d\n",
 180                  p->pnum, smb_mincnt, smb_maxcnt, nread));
 181
 182         return chain_reply(inbuf,outbuf,length,bufsize);
 183 }
 184
 185 /****************************************************************************
 186   reply to a close
 187 ****************************************************************************/
 188 int reply_pipe_close(connection_struct *conn, char *inbuf,char *outbuf)
 189 {
 190         pipes_struct *p = get_rpc_pipe_p(inbuf,smb_vwv0);
 191         int outsize = set_message(outbuf,0,0,True);
 192
 193         if (!p) return(ERROR(ERRDOS,ERRbadfid));
 194
 195         DEBUG(5,("reply_pipe_close: pnum:%x\n", p->pnum));
 196
 197         if (!close_rpc_pipe_hnd(p, conn)) return(ERROR(ERRDOS,ERRbadfid));
 198
 199         return(outsize);
 200 }
 201