/* Unix SMB/Netbios implementation. Version 1.9. SMB NT transaction handling Copyright (C) Jeremy Allison 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. */ #include "includes.h" #include "nterr.h" extern int DEBUGLEVEL; extern int Protocol; extern int Client; extern int oplock_sock; extern int smb_read_error; extern int global_oplock_break; extern int chain_size; extern BOOL case_sensitive; extern BOOL case_preserve; extern BOOL short_case_preserve; static void remove_pending_change_notify_requests_by_mid(int mid); static char *known_nt_pipes[] = { "\\LANMAN", "\\srvsvc", "\\samr", "\\wkssvc", "\\NETLOGON", "\\ntlsa", "\\ntsvcs", "\\lsass", "\\lsarpc", NULL }; /**************************************************************************** Send the required number of replies back. We assume all fields other than the data fields are set correctly for the type of call. HACK ! Always assumes smb_setup field is zero. ****************************************************************************/ static int send_nt_replies(char *outbuf, int bufsize, char *params, int paramsize, char *pdata, int datasize) { extern int max_send; int data_to_send = datasize; int params_to_send = paramsize; int useable_space; char *pp = params; char *pd = pdata; int params_sent_thistime, data_sent_thistime, total_sent_thistime; int alignment_offset = 3; int data_alignment_offset = 0; /* * Initially set the wcnt area to be 18 - this is true for all * transNT replies. */ set_message(outbuf,18,0,True); /* * If there genuinely are no parameters or data to send just send * the empty packet. */ if(params_to_send == 0 && data_to_send == 0) { send_smb(Client,outbuf); return 0; } /* * When sending params and data ensure that both are nicely aligned. * Only do this alignment when there is also data to send - else * can cause NT redirector problems. */ if (((params_to_send % 4) != 0) && (data_to_send != 0)) data_alignment_offset = 4 - (params_to_send % 4); /* * Space is bufsize minus Netbios over TCP header minus SMB header. * The alignment_offset is to align the param bytes on a four byte * boundary (2 bytes for data len, one byte pad). * NT needs this to work correctly. */ useable_space = bufsize - ((smb_buf(outbuf)+ alignment_offset+data_alignment_offset) - outbuf); /* * useable_space can never be more than max_send minus the * alignment offset. */ useable_space = MIN(useable_space, max_send - (alignment_offset+data_alignment_offset)); while (params_to_send || data_to_send) { /* * Calculate whether we will totally or partially fill this packet. */ total_sent_thistime = params_to_send + data_to_send + alignment_offset + data_alignment_offset; /* * We can never send more than useable_space. */ total_sent_thistime = MIN(total_sent_thistime, useable_space); set_message(outbuf, 18, total_sent_thistime, True); /* * Set total params and data to be sent. */ SIVAL(outbuf,smb_ntr_TotalParameterCount,paramsize); SIVAL(outbuf,smb_ntr_TotalDataCount,datasize); /* * Calculate how many parameters and data we can fit into * this packet. Parameters get precedence. */ params_sent_thistime = MIN(params_to_send,useable_space); data_sent_thistime = useable_space - params_sent_thistime; data_sent_thistime = MIN(data_sent_thistime,data_to_send); SIVAL(outbuf,smb_ntr_ParameterCount,params_sent_thistime); if(params_sent_thistime == 0) { SIVAL(outbuf,smb_ntr_ParameterOffset,0); SIVAL(outbuf,smb_ntr_ParameterDisplacement,0); } else { /* * smb_ntr_ParameterOffset is the offset from the start of the SMB header to the * parameter bytes, however the first 4 bytes of outbuf are * the Netbios over TCP header. Thus use smb_base() to subtract * them from the calculation. */ SIVAL(outbuf,smb_ntr_ParameterOffset, ((smb_buf(outbuf)+alignment_offset) - smb_base(outbuf))); /* * Absolute displacement of param bytes sent in this packet. */ SIVAL(outbuf,smb_ntr_ParameterDisplacement,pp - params); } /* * Deal with the data portion. */ SIVAL(outbuf,smb_ntr_DataCount, data_sent_thistime); if(data_sent_thistime == 0) { SIVAL(outbuf,smb_ntr_DataOffset,0); SIVAL(outbuf,smb_ntr_DataDisplacement, 0); } else { /* * The offset of the data bytes is the offset of the * parameter bytes plus the number of parameters being sent this time. */ SIVAL(outbuf,smb_ntr_DataOffset,((smb_buf(outbuf)+alignment_offset) - smb_base(outbuf)) + params_sent_thistime + data_alignment_offset); SIVAL(outbuf,smb_ntr_DataDisplacement, pd - pdata); } /* * Copy the param bytes into the packet. */ if(params_sent_thistime) memcpy((smb_buf(outbuf)+alignment_offset),pp,params_sent_thistime); /* * Copy in the data bytes */ if(data_sent_thistime) memcpy(smb_buf(outbuf)+alignment_offset+params_sent_thistime+ data_alignment_offset,pd,data_sent_thistime); DEBUG(9,("nt_rep: params_sent_thistime = %d, data_sent_thistime = %d, useable_space = %d\n", params_sent_thistime, data_sent_thistime, useable_space)); DEBUG(9,("nt_rep: params_to_send = %d, data_to_send = %d, paramsize = %d, datasize = %d\n", params_to_send, data_to_send, paramsize, datasize)); /* Send the packet */ send_smb(Client,outbuf); pp += params_sent_thistime; pd += data_sent_thistime; params_to_send -= params_sent_thistime; data_to_send -= data_sent_thistime; /* * Sanity check */ if(params_to_send < 0 || data_to_send < 0) { DEBUG(0,("send_nt_replies failed sanity check pts = %d, dts = %d\n!!!", params_to_send, data_to_send)); return -1; } } return 0; } /**************************************************************************** Save case statics. ****************************************************************************/ static BOOL saved_case_sensitive; static BOOL saved_case_preserve; static BOOL saved_short_case_preserve; /**************************************************************************** Save case semantics. ****************************************************************************/ static void set_posix_case_semantics(uint32 file_attributes) { if(!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) return; saved_case_sensitive = case_sensitive; saved_case_preserve = case_preserve; saved_short_case_preserve = short_case_preserve; /* Set to POSIX. */ case_sensitive = True; case_preserve = True; short_case_preserve = True; } /**************************************************************************** Restore case semantics. ****************************************************************************/ static void restore_case_semantics(uint32 file_attributes) { if(!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) return; case_sensitive = saved_case_sensitive; case_preserve = saved_case_preserve; short_case_preserve = saved_short_case_preserve; } /**************************************************************************** Utility function to map create disposition. ****************************************************************************/ static int map_create_disposition( uint32 create_disposition) { switch( create_disposition ) { case FILE_CREATE: /* create if not exist, fail if exist */ return 0x10; case FILE_SUPERSEDE: case FILE_OVERWRITE_IF: /* create if not exist, trunc if exist */ return 0x12; case FILE_OPEN: /* fail if not exist, open if exists */ return 0x1; case FILE_OPEN_IF: /* create if not exist, open if exists */ return 0x11; case FILE_OVERWRITE: /* fail if not exist, truncate if exists */ return 0x2; default: DEBUG(0,("map_create_disposition: Incorrect value for create_disposition = %d\n", create_disposition )); return -1; } } /**************************************************************************** Utility function to map share modes. ****************************************************************************/ static int map_share_mode( uint32 desired_access, uint32 share_access, uint32 file_attributes) { int smb_open_mode = -1; switch( desired_access & (FILE_READ_DATA|FILE_WRITE_DATA) ) { case FILE_READ_DATA: smb_open_mode = 0; break; case FILE_WRITE_DATA: smb_open_mode = 1; break; case FILE_READ_DATA|FILE_WRITE_DATA: smb_open_mode = 2; break; } if (smb_open_mode == -1) { if(desired_access & (DELETE_ACCESS|FILE_WRITE_ATTRIBUTES| WRITE_DAC_ACCESS|WRITE_OWNER_ACCESS)) smb_open_mode = 2; else if(desired_access & (FILE_EXECUTE|READ_CONTROL_ACCESS)) smb_open_mode = 0; else { DEBUG(0,("map_share_mode: Incorrect value for desired_access = %x\n", desired_access)); return -1; } } /* Add in the requested share mode - ignore FILE_SHARE_DELETE for now. */ switch( share_access & (FILE_SHARE_READ|FILE_SHARE_WRITE)) { case FILE_SHARE_READ: smb_open_mode |= (DENY_WRITE<<4); break; case FILE_SHARE_WRITE: smb_open_mode |= (DENY_READ<<4); break; case (FILE_SHARE_READ|FILE_SHARE_WRITE): smb_open_mode |= (DENY_NONE<<4); break; case FILE_SHARE_NONE: smb_open_mode |= (DENY_ALL<<4); break; } /* * Handle a O_SYNC request. */ if(file_attributes & FILE_FLAG_WRITE_THROUGH) smb_open_mode |= (1<<14); return smb_open_mode; } /**************************************************************************** Reply to an NT create and X call on a pipe. ****************************************************************************/ static int nt_open_pipe(char *fname, connection_struct *conn, char *inbuf, char *outbuf, int *ppnum) { pipes_struct *p = NULL; uint16 vuid = SVAL(inbuf, smb_uid); int i; DEBUG(4,("nt_open_pipe: Opening pipe %s.\n", fname)); /* See if it is one we want to handle. */ for( i = 0; known_nt_pipes[i]; i++ ) if( strequal(fname,known_nt_pipes[i])) break; if ( known_nt_pipes[i] == NULL ) return(ERROR(ERRSRV,ERRaccess)); /* Strip \\ off the name. */ fname++; DEBUG(3,("nt_open_pipe: Known pipe %s opening.\n", fname)); p = open_rpc_pipe_p(fname, conn, vuid); if (!p) return(ERROR(ERRSRV,ERRnofids)); *ppnum = p->pnum; return 0; } /**************************************************************************** Reply to an NT create and X call. ****************************************************************************/ int reply_ntcreate_and_X(connection_struct *conn, char *inbuf,char *outbuf,int length,int bufsize) { pstring fname; uint32 flags = IVAL(inbuf,smb_ntcreate_Flags); uint32 desired_access = IVAL(inbuf,smb_ntcreate_DesiredAccess); uint32 file_attributes = IVAL(inbuf,smb_ntcreate_FileAttributes); uint32 share_access = IVAL(inbuf,smb_ntcreate_ShareAccess); uint32 create_disposition = IVAL(inbuf,smb_ntcreate_CreateDisposition); uint32 create_options = IVAL(inbuf,smb_ntcreate_CreateOptions); uint32 fname_len = MIN(((uint32)SVAL(inbuf,smb_ntcreate_NameLength)), ((uint32)sizeof(fname)-1)); int smb_ofun; int smb_open_mode; int smb_attr = (file_attributes & SAMBA_ATTRIBUTES_MASK); /* Breakout the oplock request bits so we can set the reply bits separately. */ int oplock_request = 0; int unixmode, pnum = -1; int fmode=0,mtime=0,rmode=0; SMB_OFF_T file_len = 0; SMB_STRUCT_STAT sbuf; int smb_action = 0; BOOL bad_path = False; files_struct *fsp=NULL; char *p = NULL; /* * We need to construct the open_and_X ofun value from the * NT values, as that's what our code is structured to accept. */ if((smb_ofun = map_create_disposition( create_disposition )) == -1) return(ERROR(ERRDOS,ERRbadaccess)); /* * Now contruct the smb_open_mode value from the desired access * and the share access. */ if((smb_open_mode = map_share_mode(desired_access, share_access, file_attributes)) == -1) { return(ERROR(ERRDOS,ERRbadaccess)); } /* * Get the file name. */ StrnCpy(fname,smb_buf(inbuf),fname_len); fname[fname_len] = '\0'; /* If it's an IPC, use the pipe handler. */ if (IS_IPC(conn)) { int ret = nt_open_pipe(fname, conn, inbuf, outbuf, &pnum); if(ret != 0) return ret; /* * Deal with pipe return. */ set_message(outbuf,34,0,True); p = outbuf + smb_vwv2; p++; SSVAL(p,0,pnum); p += 2; SIVAL(p,0,FILE_WAS_OPENED); p += 4; p += 32; SIVAL(p,0,FILE_ATTRIBUTE_NORMAL); /* File Attributes. */ p += 20; /* File type. */ SSVAL(p,0,FILE_TYPE_MESSAGE_MODE_PIPE); /* Device state. */ SSVAL(p,2, 0x5FF); /* ? */ DEBUG(5,("reply_ntcreate_and_X: open pipe = %s\n", fname)); return chain_reply(inbuf,outbuf,length,bufsize); } /* * Ordinary file or directory. */ /* * Check if POSIX semantics are wanted. */ set_posix_case_semantics(file_attributes); unix_convert(fname,conn,0,&bad_path,NULL); fsp = file_new(); if (!fsp) { restore_case_semantics(file_attributes); return(ERROR(ERRSRV,ERRnofids)); } if (!check_name(fname,conn)) { if((errno == ENOENT) && bad_path) { unix_ERR_class = ERRDOS; unix_ERR_code = ERRbadpath; } file_free(fsp); restore_case_semantics(file_attributes); return(UNIXERROR(ERRDOS,ERRnoaccess)); } unixmode = unix_mode(conn,smb_attr | aARCH); oplock_request = (flags & REQUEST_OPLOCK) ? EXCLUSIVE_OPLOCK : 0; oplock_request |= (flags & REQUEST_BATCH_OPLOCK) ? BATCH_OPLOCK : 0; /* * If it's a request for a directory open, deal with it separately. */ if(create_options & FILE_DIRECTORY_FILE) { oplock_request = 0; open_directory(fsp, conn, fname, smb_ofun, unixmode, &smb_action); restore_case_semantics(file_attributes); if(!fsp->open) { file_free(fsp); return(UNIXERROR(ERRDOS,ERRnoaccess)); } } else { /* * Ordinary file case. */ /* NB. We have a potential bug here. If we * cause an oplock break to ourselves, then we * could end up processing filename related * SMB requests whilst we await the oplock * break response. As we may have changed the * filename case semantics to be POSIX-like, * this could mean a filename request could * fail when it should succeed. This is a rare * condition, but eventually we must arrange * to restore the correct case semantics * before issuing an oplock break request to * our client. JRA. */ open_file_shared(fsp,conn,fname,smb_open_mode, smb_ofun,unixmode, oplock_request,&rmode,&smb_action); if (!fsp->open) { /* We cheat here. The only case we * care about is a directory rename, * where the NT client will attempt to * open the source directory for * DELETE access. Note that when the * NT client does this it does *not* * set the directory bit in the * request packet. This is translated * into a read/write open * request. POSIX states that any open * for write request on a directory * will generate an EISDIR error, so * we can catch this here and open a * pseudo handle that is flagged as a * directory. JRA. */ if(errno == EISDIR) { oplock_request = 0; open_directory(fsp, conn, fname, smb_ofun, unixmode, &smb_action); if(!fsp->open) { file_free(fsp); restore_case_semantics(file_attributes); return(UNIXERROR(ERRDOS,ERRnoaccess)); } } else { if((errno == ENOENT) && bad_path) { unix_ERR_class = ERRDOS; unix_ERR_code = ERRbadpath; } file_free(fsp); restore_case_semantics(file_attributes); return(UNIXERROR(ERRDOS,ERRnoaccess)); } } } if(fsp->is_directory) { if(dos_stat(fsp->fsp_name, &sbuf) != 0) { close_directory(fsp); restore_case_semantics(file_attributes); return(ERROR(ERRDOS,ERRnoaccess)); } } else { if (sys_fstat(fsp->fd_ptr->fd,&sbuf) != 0) { close_file(fsp,False); restore_case_semantics(file_attributes); return(ERROR(ERRDOS,ERRnoaccess)); } } restore_case_semantics(file_attributes); file_len = sbuf.st_size; fmode = dos_mode(conn,fname,&sbuf); if(fmode == 0) fmode = FILE_ATTRIBUTE_NORMAL; mtime = sbuf.st_mtime; if (!fsp->is_directory && (fmode & aDIR)) { close_file(fsp,False); return(ERROR(ERRDOS,ERRnoaccess)); } /* * If the caller set the extended oplock request bit * and we granted one (by whatever means) - set the * correct bit for extended oplock reply. */ if (oplock_request && lp_fake_oplocks(SNUM(conn))) smb_action |= EXTENDED_OPLOCK_GRANTED; if(oplock_request && fsp->granted_oplock) smb_action |= EXTENDED_OPLOCK_GRANTED; set_message(outbuf,34,0,True); p = outbuf + smb_vwv2; /* * Currently as we don't support level II oplocks we just report * exclusive & batch here. */ SCVAL(p,0, (smb_action & EXTENDED_OPLOCK_GRANTED ? 1 : 0)); p++; SSVAL(p,0,fsp->fnum); p += 2; SIVAL(p,0,smb_action); p += 4; /* Create time. */ put_long_date(p,get_create_time(&sbuf,lp_fake_dir_create_times(SNUM(conn)))); p += 8; put_long_date(p,sbuf.st_atime); /* access time */ p += 8; put_long_date(p,sbuf.st_mtime); /* write time */ p += 8; put_long_date(p,sbuf.st_mtime); /* change time */ p += 8; SIVAL(p,0,fmode); /* File Attributes. */ p += 4; #ifdef LARGE_SMB_OFF_T SIVAL(p,0, file_len); SIVAL(p,4, file_len >> 32); #else /* LARGE_SMB_OFF_T */ SIVAL(p,0,file_len); #endif /* LARGE_SMB_OFF_T */ p += 8; #ifdef LARGE_SMB_OFF_T SIVAL(p,0, file_len); SIVAL(p,4, file_len >> 32); #else /* LARGE_SMB_OFF_T */ SIVAL(p,0,file_len); #endif /* LARGE_SMB_OFF_T */ p += 12; SCVAL(p,0,fsp->is_directory ? 1 : 0); DEBUG(5,("reply_ntcreate_and_X: fnum = %d, open name = %s\n", fsp->fnum, fsp->fsp_name)); return chain_reply(inbuf,outbuf,length,bufsize); } /**************************************************************************** Reply to a NT_TRANSACT_CREATE call (needs to process SD's). ****************************************************************************/ static int call_nt_transact_create(connection_struct *conn, char *inbuf, char *outbuf, int length, int bufsize, char **ppsetup, char **ppparams, char **ppdata) { pstring fname; char *params = *ppparams; uint32 flags = IVAL(params,0); uint32 desired_access = IVAL(params,8); uint32 file_attributes = IVAL(params,20); uint32 share_access = IVAL(params,24); uint32 create_disposition = IVAL(params,28); uint32 create_options = IVAL(params,32); uint32 fname_len = MIN(((uint32)IVAL(params,44)), ((uint32)sizeof(fname)-1)); int smb_ofun; int smb_open_mode; int smb_attr = (file_attributes & SAMBA_ATTRIBUTES_MASK); /* Breakout the oplock request bits so we can set the reply bits separately. */ int oplock_request = 0; int unixmode, pnum = -1; int fmode=0,mtime=0,rmode=0; off_t file_len = 0; SMB_STRUCT_STAT sbuf; int smb_action = 0; BOOL bad_path = False; files_struct *fsp = NULL; char *p = NULL; /* * We need to construct the open_and_X ofun value from the * NT values, as that's what our code is structured to accept. */ if((smb_ofun = map_create_disposition( create_disposition )) == -1) return(ERROR(ERRDOS,ERRbadaccess)); /* * Now contruct the smb_open_mode value from the desired access * and the share access. */ if((smb_open_mode = map_share_mode( desired_access, share_access, file_attributes)) == -1) return(ERROR(ERRDOS,ERRbadaccess)); /* * Get the file name. */ StrnCpy(fname,params+53,fname_len); fname[fname_len] = '\0'; /* If it's an IPC, use the pipe handler. */ if (IS_IPC(conn)) { int ret = nt_open_pipe(fname, conn, inbuf, outbuf, &pnum); if(ret != 0) return ret; smb_action = FILE_WAS_OPENED; } else { /* * Check if POSIX semantics are wanted. */ set_posix_case_semantics(file_attributes); unix_convert(fname,conn,0,&bad_path,NULL); fsp = file_new(); if (!fsp) { restore_case_semantics(file_attributes); return(ERROR(ERRSRV,ERRnofids)); } if (!check_name(fname,conn)) { if((errno == ENOENT) && bad_path) { unix_ERR_class = ERRDOS; unix_ERR_code = ERRbadpath; } file_free(fsp); restore_case_semantics(file_attributes); return(UNIXERROR(ERRDOS,ERRnoaccess)); } unixmode = unix_mode(conn,smb_attr | aARCH); oplock_request = (flags & REQUEST_OPLOCK) ? EXCLUSIVE_OPLOCK : 0; oplock_request |= (flags & REQUEST_BATCH_OPLOCK) ? BATCH_OPLOCK : 0; /* * If it's a request for a directory open, deal with it separately. */ if(create_options & FILE_DIRECTORY_FILE) { oplock_request = 0; /* * We will get a create directory here if the Win32 * app specified a security descriptor in the * CreateDirectory() call. */ open_directory(fsp, conn, fname, smb_ofun, unixmode, &smb_action); if(!fsp->open) { file_free(fsp); return(UNIXERROR(ERRDOS,ERRnoaccess)); } } else { /* * Ordinary file case. */ open_file_shared(fsp,conn,fname,smb_open_mode,smb_ofun,unixmode, oplock_request,&rmode,&smb_action); if (!fsp->open) { if((errno == ENOENT) && bad_path) { unix_ERR_class = ERRDOS; unix_ERR_code = ERRbadpath; } file_free(fsp); restore_case_semantics(file_attributes); return(UNIXERROR(ERRDOS,ERRnoaccess)); } if (sys_fstat(fsp->fd_ptr->fd,&sbuf) != 0) { close_file(fsp,False); restore_case_semantics(file_attributes); return(ERROR(ERRDOS,ERRnoaccess)); } file_len = sbuf.st_size; fmode = dos_mode(conn,fname,&sbuf); if(fmode == 0) fmode = FILE_ATTRIBUTE_NORMAL; mtime = sbuf.st_mtime; if (fmode & aDIR) { close_file(fsp,False); restore_case_semantics(file_attributes); return(ERROR(ERRDOS,ERRnoaccess)); } /* * If the caller set the extended oplock request bit * and we granted one (by whatever means) - set the * correct bit for extended oplock reply. */ if (oplock_request && lp_fake_oplocks(SNUM(conn))) smb_action |= EXTENDED_OPLOCK_GRANTED; if(oplock_request && fsp->granted_oplock) smb_action |= EXTENDED_OPLOCK_GRANTED; } } restore_case_semantics(file_attributes); /* Realloc the size of parameters and data we will return */ params = *ppparams = Realloc(*ppparams, 69); if(params == NULL) return(ERROR(ERRDOS,ERRnomem)); p = params; SCVAL(p,0, (smb_action & EXTENDED_OPLOCK_GRANTED ? 1 : 0)); p += 2; if (IS_IPC(conn)) { SSVAL(p,0,pnum); } else { SSVAL(p,0,fsp->fnum); } p += 2; SIVAL(p,0,smb_action); p += 8; if (IS_IPC(conn)) { /* * Deal with pipe return. */ p += 32; SIVAL(p,0,FILE_ATTRIBUTE_NORMAL); /* File Attributes. */ p += 20; /* File type. */ SSVAL(p,0,FILE_TYPE_MESSAGE_MODE_PIPE); /* Device state. */ SSVAL(p,2, 0x5FF); /* ? */ } else { /* * Deal with file return. */ /* Create time. */ put_long_date(p,get_create_time(&sbuf,lp_fake_dir_create_times(SNUM(conn)))); p += 8; put_long_date(p,sbuf.st_atime); /* access time */ p += 8; put_long_date(p,sbuf.st_mtime); /* write time */ p += 8; put_long_date(p,sbuf.st_mtime); /* change time */ p += 8; SIVAL(p,0,fmode); /* File Attributes. */ p += 4; #ifdef LARGE_SMB_OFF_T SIVAL(p,0, file_len); SIVAL(p,4, (file_len >> 32)); #else /* LARGE_SMB_OFF_T */ SIVAL(p,0,file_len); #endif /* LARGE_SMB_OFF_T */ p += 8; #ifdef LARGE_SMB_OFF_T SIVAL(p,0, file_len); SIVAL(p,4, (file_len >> 32)); #else /* LARGE_SMB_OFF_T */ SIVAL(p,0,file_len); #endif /* LARGE_SMB_OFF_T */ } /* Send the required number of replies */ send_nt_replies(outbuf, bufsize, params, 69, *ppdata, 0); return -1; } /**************************************************************************** Reply to a NT CANCEL request. ****************************************************************************/ int reply_ntcancel(connection_struct *conn, char *inbuf,char *outbuf,int length,int bufsize) { /* * Go through and cancel any pending change notifies. */ int mid = SVAL(inbuf,smb_mid); remove_pending_change_notify_requests_by_mid(mid); remove_pending_lock_requests_by_mid(mid); DEBUG(3,("reply_ntcancel: cancel called on mid = %d.\n", mid)); return(-1); } /**************************************************************************** Reply to an unsolicited SMBNTtranss - just ignore it! ****************************************************************************/ int reply_nttranss(connection_struct *conn, char *inbuf,char *outbuf,int length,int bufsize) { DEBUG(4,("Ignoring nttranss of length %d\n",length)); return(-1); } /**************************************************************************** Reply to an NT transact rename command. ****************************************************************************/ static int call_nt_transact_rename(connection_struct *conn, char *inbuf, char *outbuf, int length, int bufsize, char **ppsetup, char **ppparams, char **ppdata) { char *params = *ppparams; pstring new_name; files_struct *fsp = file_fsp(params, 0); BOOL replace_if_exists = (SVAL(params,2) & RENAME_REPLACE_IF_EXISTS) ? True : False; uint32 fname_len = MIN((((uint32)IVAL(inbuf,smb_nt_TotalParameterCount)-4)), ((uint32)sizeof(new_name)-1)); int outsize = 0; CHECK_FSP(fsp, conn); StrnCpy(new_name,params+4,fname_len); new_name[fname_len] = '\0'; outsize = rename_internals(conn, inbuf, outbuf, fsp->fsp_name, new_name, replace_if_exists); if(outsize == 0) { /* * Rename was successful. */ send_nt_replies(outbuf, bufsize, NULL, 0, NULL, 0); DEBUG(3,("nt transact rename from = %s, to = %s succeeded.\n", fsp->fsp_name, new_name)); outsize = -1; } return(outsize); } /**************************************************************************** This is the structure to queue to implement NT change notify. It consists of smb_size bytes stored from the transact command (to keep the mid, tid etc around). Plus the fid to examine and the time to check next. *****************************************************************************/ typedef struct { ubi_slNode msg_next; files_struct *fsp; connection_struct *conn; time_t next_check_time; time_t modify_time; /* Info from the directory we're monitoring. */ time_t status_time; /* Info from the directory we're monitoring. */ char request_buf[smb_size]; } change_notify_buf; static ubi_slList change_notify_queue = { NULL, (ubi_slNodePtr)&change_notify_queue, 0}; /**************************************************************************** Setup the common parts of the return packet and send it. *****************************************************************************/ static void change_notify_reply_packet(char *inbuf, int error_class, uint32 error_code) { extern int Client; char outbuf[smb_size+38]; memset(outbuf, '\0', sizeof(outbuf)); construct_reply_common(inbuf, outbuf); /* * If we're returning a 'too much in the directory changed' we need to * set this is an NT error status flags. If we don't then the (probably * untested) code in the NT redirector has a bug in that it doesn't re-issue * the change notify.... Ah - I *love* it when I get so deeply into this I * can even determine how MS failed to test stuff and why.... :-). JRA. */ if(error_class == 0) /* NT Error. */ SSVAL(outbuf,smb_flg2, SVAL(outbuf,smb_flg2) | FLAGS2_32_BIT_ERROR_CODES); ERROR(error_class,error_code); /* * Seems NT needs a transact command with an error code * in it. This is a longer packet than a simple error. */ set_message(outbuf,18,0,False); send_smb(Client,outbuf); } /**************************************************************************** Delete entries by fnum from the change notify pending queue. *****************************************************************************/ void remove_pending_change_notify_requests_by_fid(files_struct *fsp) { change_notify_buf *cnbp = (change_notify_buf *)ubi_slFirst( &change_notify_queue ); change_notify_buf *prev = NULL; while(cnbp != NULL) { if(cnbp->fsp->fnum == fsp->fnum) { free((char *)ubi_slRemNext( &change_notify_queue, prev)); cnbp = (change_notify_buf *)(prev ? ubi_slNext(prev) : ubi_slFirst(&change_notify_queue)); continue; } prev = cnbp; cnbp = (change_notify_buf *)ubi_slNext(cnbp); } } /**************************************************************************** Delete entries by mid from the change notify pending queue. Always send reply. *****************************************************************************/ static void remove_pending_change_notify_requests_by_mid(int mid) { change_notify_buf *cnbp = (change_notify_buf *)ubi_slFirst( &change_notify_queue ); change_notify_buf *prev = NULL; while(cnbp != NULL) { if(SVAL(cnbp->request_buf,smb_mid) == mid) { change_notify_reply_packet(cnbp->request_buf,0,NT_STATUS_CANCELLED); free((char *)ubi_slRemNext( &change_notify_queue, prev)); cnbp = (change_notify_buf *)(prev ? ubi_slNext(prev) : ubi_slFirst(&change_notify_queue)); continue; } prev = cnbp; cnbp = (change_notify_buf *)ubi_slNext(cnbp); } } /**************************************************************************** Process the change notify queue. Note that this is only called as root. *****************************************************************************/ void process_pending_change_notify_queue(time_t t) { change_notify_buf *cnbp = (change_notify_buf *)ubi_slFirst( &change_notify_queue ); change_notify_buf *prev = NULL; if(cnbp == NULL) return; if(cnbp->next_check_time >= t) return; /* * It's time to check. Go through the queue and see if * the timestamps changed. */ while((cnbp != NULL) && (cnbp->next_check_time <= t)) { SMB_STRUCT_STAT st; files_struct *fsp = cnbp->fsp; connection_struct *conn = cnbp->conn; uint16 vuid = (lp_security() == SEC_SHARE) ? UID_FIELD_INVALID : SVAL(cnbp->request_buf,smb_uid); /* * Ensure we don't have any old chain_fsp values * sitting around.... */ chain_size = 0; file_chain_reset(); if(!become_user(conn,vuid)) { DEBUG(0,("process_pending_change_notify_queue: Unable to become user vuid=%d.\n", vuid )); /* * Remove the entry and return an error to the client. */ change_notify_reply_packet(cnbp->request_buf,ERRSRV,ERRaccess); free((char *)ubi_slRemNext( &change_notify_queue, prev)); cnbp = (change_notify_buf *)(prev ? ubi_slNext(prev) : ubi_slFirst(&change_notify_queue)); continue; } if(!become_service(conn,True)) { DEBUG(0,("process_pending_change_notify_queue: Unable to become service Error was %s.\n", strerror(errno) )); /* * Remove the entry and return an error to the client. */ change_notify_reply_packet(cnbp->request_buf,ERRSRV,ERRaccess); free((char *)ubi_slRemNext( &change_notify_queue, prev)); cnbp = (change_notify_buf *)(prev ? ubi_slNext(prev) : ubi_slFirst(&change_notify_queue)); unbecome_user(); continue; } if(dos_stat(fsp->fsp_name, &st) < 0) { DEBUG(0,("process_pending_change_notify_queue: Unable to stat directory %s. \ Error was %s.\n", fsp->fsp_name, strerror(errno) )); /* * Remove the entry and return an error to the client. */ change_notify_reply_packet(cnbp->request_buf,ERRSRV,ERRaccess); free((char *)ubi_slRemNext( &change_notify_queue, prev)); cnbp = (change_notify_buf *)(prev ? ubi_slNext(prev) : ubi_slFirst(&change_notify_queue)); unbecome_user(); continue; } if(cnbp->modify_time != st.st_mtime || cnbp->status_time != st.st_ctime) { /* * Remove the entry and return a change notify to the client. */ DEBUG(5,("process_pending_change_notify_queue: directory name = %s changed\n", fsp->fsp_name )); change_notify_reply_packet(cnbp->request_buf,0,NT_STATUS_NOTIFY_ENUM_DIR); free((char *)ubi_slRemNext( &change_notify_queue, prev)); cnbp = (change_notify_buf *)(prev ? ubi_slNext(prev) : ubi_slFirst(&change_notify_queue)); unbecome_user(); continue; } unbecome_user(); /* * Move to the next in the list. */ prev = cnbp; cnbp = (change_notify_buf *)ubi_slNext(cnbp); } } /**************************************************************************** Reply to a notify change - queue the request and don't allow a directory to be opened. ****************************************************************************/ static int call_nt_transact_notify_change(connection_struct *conn, char *inbuf, char *outbuf, int length, int bufsize, char **ppsetup, char **ppparams, char **ppdata) { char *setup = *ppsetup; files_struct *fsp; change_notify_buf *cnbp; SMB_STRUCT_STAT st; fsp = file_fsp(setup,4); DEBUG(3,("call_nt_transact_notify_change\n")); if(!fsp) return(ERROR(ERRDOS,ERRbadfid)); if((!fsp->open) || (!fsp->is_directory) || (conn != fsp->conn)) return(ERROR(ERRDOS,ERRbadfid)); /* * Now queue an entry on the notify change stack. We timestamp * the entry we are adding so that we know when to scan next. * We only need to save smb_size bytes from this incoming packet * as we will always by returning a 'read the directory yourself' * error. */ if((cnbp = (change_notify_buf *)malloc(sizeof(change_notify_buf))) == NULL) { DEBUG(0,("call_nt_transact_notify_change: Malloc fail (2) !\n" )); return -1; } /* * Store the current timestamp on the directory we are monitoring. */ if(dos_stat(fsp->fsp_name, &st) < 0) { DEBUG(0,("call_nt_transact_notify_change: Unable to stat name = %s. \ Error was %s\n", fsp->fsp_name, strerror(errno) )); free((char *)cnbp); return(UNIXERROR(ERRDOS,ERRbadfid)); } memcpy(cnbp->request_buf, inbuf, smb_size); cnbp->fsp = fsp; cnbp->conn = conn; cnbp->modify_time = st.st_mtime; cnbp->status_time = st.st_ctime; cnbp->next_check_time = time(NULL) + lp_change_notify_timeout(); /* * Adding to the tail enables us to check only * the head when scanning for change, as this entry * is forced to have the first timeout expiration. */ ubi_slAddTail(&change_notify_queue, cnbp); DEBUG(3,("call_nt_transact_notify_change: notify change called on directory \ name = %s\n", fsp->fsp_name )); return -1; } /**************************************************************************** Reply to query a security descriptor - currently this is not implemented (it is planned to be though). ****************************************************************************/ static int call_nt_transact_query_security_desc(connection_struct *conn, char *inbuf, char *outbuf, int length, int bufsize, char **ppsetup, char **ppparams, char **ppdata) { DEBUG(0,("call_nt_transact_query_security_desc: Currently not implemented.\n")); return(ERROR(ERRSRV,ERRnosupport)); } /**************************************************************************** Reply to set a security descriptor - currently this is not implemented (it is planned to be though). ****************************************************************************/ static int call_nt_transact_set_security_desc(connection_struct *conn, char *inbuf, char *outbuf, int length, int bufsize, char **ppsetup, char **ppparams, char **ppdata) { DEBUG(0,("call_nt_transact_set_security_desc: Currently not implemented.\n")); return(ERROR(ERRSRV,ERRnosupport)); } /**************************************************************************** Reply to IOCTL - not implemented - no plans. ****************************************************************************/ static int call_nt_transact_ioctl(connection_struct *conn, char *inbuf, char *outbuf, int length, int bufsize, char **ppsetup, char **ppparams, char **ppdata) { DEBUG(0,("call_nt_transact_ioctl: Currently not implemented.\n")); return(ERROR(ERRSRV,ERRnosupport)); } /**************************************************************************** Reply to a SMBNTtrans. ****************************************************************************/ int reply_nttrans(connection_struct *conn, char *inbuf,char *outbuf,int length,int bufsize) { int outsize = 0; #if 0 /* Not used. */ uint16 max_setup_count = CVAL(inbuf, smb_nt_MaxSetupCount); uint32 max_parameter_count = IVAL(inbuf, smb_nt_MaxParameterCount); uint32 max_data_count = IVAL(inbuf,smb_nt_MaxDataCount); #endif /* Not used. */ uint32 total_parameter_count = IVAL(inbuf, smb_nt_TotalParameterCount); uint32 total_data_count = IVAL(inbuf, smb_nt_TotalDataCount); uint32 parameter_count = IVAL(inbuf,smb_nt_ParameterCount); uint32 parameter_offset = IVAL(inbuf,smb_nt_ParameterOffset); uint32 data_count = IVAL(inbuf,smb_nt_DataCount); uint32 data_offset = IVAL(inbuf,smb_nt_DataOffset); uint16 setup_count = 2*CVAL(inbuf,smb_nt_SetupCount); /* setup count is in *words* */ uint16 function_code = SVAL( inbuf, smb_nt_Function); char *params = NULL, *data = NULL, *setup = NULL; uint32 num_params_sofar, num_data_sofar; if(global_oplock_break && (function_code == NT_TRANSACT_CREATE)) { /* * Queue this open message as we are the process of an oplock break. */ DEBUG(2,("reply_nttrans: queueing message NT_TRANSACT_CREATE \ due to being in oplock break state.\n" )); push_oplock_pending_smb_message( inbuf, length); return -1; } outsize = set_message(outbuf,0,0,True); /* * All nttrans messages we handle have smb_wct == 19 + setup_count. * Ensure this is so as a sanity check. */ if(CVAL(inbuf, smb_wct) != 19 + (setup_count/2)) { DEBUG(2,("Invalid smb_wct %d in nttrans call (should be %d)\n", CVAL(inbuf, smb_wct), 19 + (setup_count/2))); return(ERROR(ERRSRV,ERRerror)); } /* Allocate the space for the setup, the maximum needed parameters and data */ if(setup_count > 0) setup = (char *)malloc(setup_count); if (total_parameter_count > 0) params = (char *)malloc(total_parameter_count); if (total_data_count > 0) data = (char *)malloc(total_data_count); if ((total_parameter_count && !params) || (total_data_count && !data) || (setup_count && !setup)) { DEBUG(0,("reply_nttrans : Out of memory\n")); return(ERROR(ERRDOS,ERRnomem)); } /* Copy the param and data bytes sent with this request into the params buffer */ num_params_sofar = parameter_count; num_data_sofar = data_count; if (parameter_count > total_parameter_count || data_count > total_data_count) exit_server("reply_nttrans: invalid sizes in packet.\n"); if(setup) { memcpy( setup, &inbuf[smb_nt_SetupStart], setup_count); DEBUG(10,("reply_nttrans: setup_count = %d\n", setup_count)); dump_data(10, setup, setup_count); } if(params) { memcpy( params, smb_base(inbuf) + parameter_offset, parameter_count); DEBUG(10,("reply_nttrans: parameter_count = %d\n", parameter_count)); dump_data(10, params, parameter_count); } if(data) { memcpy( data, smb_base(inbuf) + data_offset, data_count); DEBUG(10,("reply_nttrans: data_count = %d\n",data_count)); dump_data(10, data, data_count); } if(num_data_sofar < total_data_count || num_params_sofar < total_parameter_count) { /* We need to send an interim response then receive the rest of the parameter/data bytes */ outsize = set_message(outbuf,0,0,True); send_smb(Client,outbuf); while( num_data_sofar < total_data_count || num_params_sofar < total_parameter_count) { BOOL ret; ret = receive_next_smb(Client,oplock_sock,inbuf,bufsize, SMB_SECONDARY_WAIT); if((ret && (CVAL(inbuf, smb_com) != SMBnttranss)) || !ret) { outsize = set_message(outbuf,0,0,True); if(ret) { DEBUG(0,("reply_nttrans: Invalid secondary nttrans packet\n")); } else { DEBUG(0,("reply_nttrans: %s in getting secondary nttrans response.\n", (smb_read_error == READ_ERROR) ? "error" : "timeout" )); } if(params) free(params); if(data) free(data); if(setup) free(setup); return(ERROR(ERRSRV,ERRerror)); } /* Revise total_params and total_data in case they have changed downwards */ total_parameter_count = IVAL(inbuf, smb_nts_TotalParameterCount); total_data_count = IVAL(inbuf, smb_nts_TotalDataCount); num_params_sofar += (parameter_count = IVAL(inbuf,smb_nts_ParameterCount)); num_data_sofar += ( data_count = IVAL(inbuf, smb_nts_DataCount)); if (num_params_sofar > total_parameter_count || num_data_sofar > total_data_count) exit_server("reply_nttrans2: data overflow in secondary nttrans packet\n"); memcpy( ¶ms[ IVAL(inbuf, smb_nts_ParameterDisplacement)], smb_base(inbuf) + IVAL(inbuf, smb_nts_ParameterOffset), parameter_count); memcpy( &data[IVAL(inbuf, smb_nts_DataDisplacement)], smb_base(inbuf)+ IVAL(inbuf, smb_nts_DataOffset), data_count); } } if (Protocol >= PROTOCOL_NT1) { uint16 flg2 = SVAL(outbuf,smb_flg2); SSVAL(outbuf,smb_flg2,flg2 | 0x40); /* IS_LONG_NAME */ } /* Now we must call the relevant NT_TRANS function */ switch(function_code) { case NT_TRANSACT_CREATE: outsize = call_nt_transact_create(conn, inbuf, outbuf, length, bufsize, &setup, ¶ms, &data); break; case NT_TRANSACT_IOCTL: outsize = call_nt_transact_ioctl(conn, inbuf, outbuf, length, bufsize, &setup, ¶ms, &data); break; case NT_TRANSACT_SET_SECURITY_DESC: outsize = call_nt_transact_set_security_desc(conn, inbuf, outbuf, length, bufsize, &setup, ¶ms, &data); break; case NT_TRANSACT_NOTIFY_CHANGE: outsize = call_nt_transact_notify_change(conn, inbuf, outbuf, length, bufsize, &setup, ¶ms, &data); break; case NT_TRANSACT_RENAME: outsize = call_nt_transact_rename(conn, inbuf, outbuf, length, bufsize, &setup, ¶ms, &data); break; case NT_TRANSACT_QUERY_SECURITY_DESC: outsize = call_nt_transact_query_security_desc(conn, inbuf, outbuf, length, bufsize, &setup, ¶ms, &data); break; default: /* Error in request */ DEBUG(0,("reply_nttrans: Unknown request %d in nttrans call\n", function_code)); if(setup) free(setup); if(params) free(params); if(data) free(data); return (ERROR(ERRSRV,ERRerror)); } /* As we do not know how many data packets will need to be returned here the various call_nt_transact_xxxx calls must send their own. Thus a call_nt_transact_xxxx routine only returns a value other than -1 when it wants to send an error packet. */ if(setup) free(setup); if(params) free(params); if(data) free(data); return outsize; /* If a correct response was needed the call_nt_transact_xxxx calls have already sent it. If outsize != -1 then it is returning an error packet. */ }