1/* 2 Unix SMB/CIFS implementation. 3 Pipe SMB reply routines 4 Copyright (C) Andrew Tridgell 1992-1998 5 Copyright (C) Luke Kenneth Casson Leighton 1996-1998 6 Copyright (C) Paul Ashton 1997-1998. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21*/ 22/* 23 This file handles reply_ calls on named pipes that the server 24 makes to handle specific protocols 25*/ 26 27 28#include "includes.h" 29 30#define PIPE "\\PIPE\\" 31#define PIPELEN strlen(PIPE) 32 33extern struct pipe_id_info pipe_names[]; 34 35/**************************************************************************** 36 reply to an open and X on a named pipe 37 38 This code is basically stolen from reply_open_and_X with some 39 wrinkles to handle pipes. 40****************************************************************************/ 41int reply_open_pipe_and_X(connection_struct *conn, 42 char *inbuf,char *outbuf,int length,int bufsize) 43{ 44 pstring fname; 45 pstring pipe_name; 46 uint16 vuid = SVAL(inbuf, smb_uid); 47 smb_np_struct *p; 48 int smb_ofun = SVAL(inbuf,smb_vwv8); 49 int size=0,fmode=0,mtime=0,rmode=0; 50 int i; 51 52 /* XXXX we need to handle passed times, sattr and flags */ 53 srvstr_pull_buf(inbuf, pipe_name, smb_buf(inbuf), sizeof(pipe_name), STR_TERMINATE); 54 55 /* If the name doesn't start \PIPE\ then this is directed */ 56 /* at a mailslot or something we really, really don't understand, */ 57 /* not just something we really don't understand. */ 58 if ( strncmp(pipe_name,PIPE,PIPELEN) != 0 ) 59 return(ERROR_DOS(ERRSRV,ERRaccess)); 60 61 DEBUG(4,("Opening pipe %s.\n", pipe_name)); 62 63 /* See if it is one we want to handle. */ 64 for( i = 0; pipe_names[i].client_pipe ; i++ ) 65 if( strequal(pipe_name,pipe_names[i].client_pipe) ) 66 break; 67 68 if (pipe_names[i].client_pipe == NULL) 69 return(ERROR_BOTH(NT_STATUS_OBJECT_NAME_NOT_FOUND,ERRDOS,ERRbadpipe)); 70 71 /* Strip \PIPE\ off the name. */ 72 pstrcpy(fname, pipe_name + PIPELEN); 73 74 75#if 0 76 /* 77 * Hack for NT printers... JRA. 78 */ 79 if(should_fail_next_srvsvc_open(fname)) 80 return(ERROR(ERRSRV,ERRaccess)); 81#endif 82 83 /* Known pipes arrive with DIR attribs. Remove it so a regular file */ 84 /* can be opened and add it in after the open. */ 85 DEBUG(3,("Known pipe %s opening.\n",fname)); 86 smb_ofun |= FILE_CREATE_IF_NOT_EXIST; 87 88 p = open_rpc_pipe_p(fname, conn, vuid); 89 if (!p) return(ERROR_DOS(ERRSRV,ERRnofids)); 90 91 /* Prepare the reply */ 92 set_message(outbuf,15,0,True); 93 94 /* Mark the opened file as an existing named pipe in message mode. */ 95 SSVAL(outbuf,smb_vwv9,2); 96 SSVAL(outbuf,smb_vwv10,0xc700); 97 98 if (rmode == 2) { 99 DEBUG(4,("Resetting open result to open from create.\n")); 100 rmode = 1; 101 } 102 103 SSVAL(outbuf,smb_vwv2, p->pnum); 104 SSVAL(outbuf,smb_vwv3,fmode); 105 put_dos_date3(outbuf,smb_vwv4,mtime); 106 SIVAL(outbuf,smb_vwv6,size); 107 SSVAL(outbuf,smb_vwv8,rmode); 108 SSVAL(outbuf,smb_vwv11,0x0001); 109 110 return chain_reply(inbuf,outbuf,length,bufsize); 111} 112 113/**************************************************************************** 114 reply to a write on a pipe 115****************************************************************************/ 116int reply_pipe_write(char *inbuf,char *outbuf,int length,int dum_bufsize) 117{ 118 smb_np_struct *p = get_rpc_pipe_p(inbuf,smb_vwv0); 119 size_t numtowrite = SVAL(inbuf,smb_vwv1); 120 int nwritten; 121 int outsize; 122 char *data; 123 124 if (!p) 125 return(ERROR_DOS(ERRDOS,ERRbadfid)); 126 127 data = smb_buf(inbuf) + 3; 128 129 if (numtowrite == 0) 130 nwritten = 0; 131 else 132 nwritten = write_to_pipe(p, data, numtowrite); 133 134 if ((nwritten == 0 && numtowrite != 0) || (nwritten < 0)) 135 return (UNIXERROR(ERRDOS,ERRnoaccess)); 136 137 outsize = set_message(outbuf,1,0,True); 138 139 SSVAL(outbuf,smb_vwv0,nwritten); 140 141 DEBUG(3,("write-IPC pnum=%04x nwritten=%d\n", 142 p->pnum, nwritten)); 143 144 return(outsize); 145} 146 147/**************************************************************************** 148 Reply to a write and X. 149 150 This code is basically stolen from reply_write_and_X with some 151 wrinkles to handle pipes. 152****************************************************************************/ 153 154int reply_pipe_write_and_X(char *inbuf,char *outbuf,int length,int bufsize) 155{ 156 smb_np_struct *p = get_rpc_pipe_p(inbuf,smb_vwv2); 157 size_t numtowrite = SVAL(inbuf,smb_vwv10); 158 int nwritten = -1; 159 int smb_doff = SVAL(inbuf, smb_vwv11); 160 BOOL pipe_start_message_raw = ((SVAL(inbuf, smb_vwv7) & (PIPE_START_MESSAGE|PIPE_RAW_MODE)) == 161 (PIPE_START_MESSAGE|PIPE_RAW_MODE)); 162 char *data; 163 164 if (!p) 165 return(ERROR_DOS(ERRDOS,ERRbadfid)); 166 167 data = smb_base(inbuf) + smb_doff; 168 169 if (numtowrite == 0) 170 nwritten = 0; 171 else { 172 if(pipe_start_message_raw) { 173 /* 174 * For the start of a message in named pipe byte mode, 175 * the first two bytes are a length-of-pdu field. Ignore 176 * them (we don't trust the client. JRA. 177 */ 178 if(numtowrite < 2) { 179 DEBUG(0,("reply_pipe_write_and_X: start of message set and not enough data sent.(%u)\n", 180 (unsigned int)numtowrite )); 181 return (UNIXERROR(ERRDOS,ERRnoaccess)); 182 } 183 184 data += 2; 185 numtowrite -= 2; 186 } 187 nwritten = write_to_pipe(p, data, numtowrite); 188 } 189 190 if ((nwritten == 0 && numtowrite != 0) || (nwritten < 0)) 191 return (UNIXERROR(ERRDOS,ERRnoaccess)); 192 193 set_message(outbuf,6,0,True); 194 195 nwritten = (pipe_start_message_raw ? nwritten + 2 : nwritten); 196 SSVAL(outbuf,smb_vwv2,nwritten); 197 198 DEBUG(3,("writeX-IPC pnum=%04x nwritten=%d\n", 199 p->pnum, nwritten)); 200 201 return chain_reply(inbuf,outbuf,length,bufsize); 202} 203 204/**************************************************************************** 205 reply to a read and X 206 207 This code is basically stolen from reply_read_and_X with some 208 wrinkles to handle pipes. 209****************************************************************************/ 210int reply_pipe_read_and_X(char *inbuf,char *outbuf,int length,int bufsize) 211{ 212 smb_np_struct *p = get_rpc_pipe_p(inbuf,smb_vwv2); 213 int smb_maxcnt = SVAL(inbuf,smb_vwv5); 214 int smb_mincnt = SVAL(inbuf,smb_vwv6); 215 int nread = -1; 216 char *data; 217 BOOL unused; 218 219 /* we don't use the offset given to use for pipe reads. This 220 is deliberate, instead we always return the next lump of 221 data on the pipe */ 222#if 0 223 uint32 smb_offs = IVAL(inbuf,smb_vwv3); 224#endif 225 226 if (!p) 227 return(ERROR_DOS(ERRDOS,ERRbadfid)); 228 229 set_message(outbuf,12,0,True); 230 data = smb_buf(outbuf); 231 232 nread = read_from_pipe(p, data, smb_maxcnt, &unused); 233 234 if (nread < 0) 235 return(UNIXERROR(ERRDOS,ERRnoaccess)); 236 237 SSVAL(outbuf,smb_vwv5,nread); 238 SSVAL(outbuf,smb_vwv6,smb_offset(data,outbuf)); 239 SSVAL(smb_buf(outbuf),-2,nread); 240 241 DEBUG(3,("readX-IPC pnum=%04x min=%d max=%d nread=%d\n", 242 p->pnum, smb_mincnt, smb_maxcnt, nread)); 243 244 /* Ensure we set up the message length to include the data length read. */ 245 set_message_bcc(outbuf,nread); 246 return chain_reply(inbuf,outbuf,length,bufsize); 247} 248 249/**************************************************************************** 250 reply to a close 251****************************************************************************/ 252int reply_pipe_close(connection_struct *conn, char *inbuf,char *outbuf) 253{ 254 smb_np_struct *p = get_rpc_pipe_p(inbuf,smb_vwv0); 255 int outsize = set_message(outbuf,0,0,True); 256 257 if (!p) 258 return(ERROR_DOS(ERRDOS,ERRbadfid)); 259 260 DEBUG(5,("reply_pipe_close: pnum:%x\n", p->pnum)); 261 262 if (!close_rpc_pipe_hnd(p)) 263 return ERROR_DOS(ERRDOS,ERRbadfid); 264 265 return(outsize); 266} 267