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/*
Unix SMB/CIFS implementation.
error packet handling
Copyright (C) Andrew Tridgell 1992-1998
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"
/* From lib/error.c */
extern struct unix_error_map unix_dos_nt_errmap[];
extern uint32 global_client_caps;
/* these can be set by some functions to override the error codes */
static int override_ERR_class;
static uint32 override_ERR_code;
static NTSTATUS override_ERR_ntstatus;
/****************************************************************************
Setting eclass and ecode only and status to NT_STATUS_INVALID forces DOS errors.
Setting status only and eclass and ecode to -1 forces NT errors.
****************************************************************************/
void set_saved_error_triple(int eclass, int ecode, NTSTATUS status)
{
override_ERR_class = eclass;
override_ERR_code = ecode;
override_ERR_ntstatus = status;
}
void set_saved_ntstatus(NTSTATUS status)
{
uint8 tmp_eclass; /* Hmmm. override_ERR_class is not uint8... */
override_ERR_ntstatus = status;
ntstatus_to_dos(status, &tmp_eclass, &override_ERR_code);
override_ERR_class = tmp_eclass;
}
/****************************************************************************
Return the current settings of the error triple. Return True if any are set.
****************************************************************************/
NTSTATUS get_saved_ntstatus(void)
{
return override_ERR_ntstatus;
}
/****************************************************************************
Create an error packet from a cached error.
****************************************************************************/
int cached_error_packet(char *outbuf,files_struct *fsp,int line,const char *file)
{
write_bmpx_struct *wbmpx = fsp->wbmpx_ptr;
int32 eclass = wbmpx->wr_errclass;
int32 err = wbmpx->wr_error;
NTSTATUS ntstatus = wbmpx->wr_status;
/* We can now delete the auxiliary struct */
SAFE_FREE(fsp->wbmpx_ptr);
return error_packet(outbuf,eclass,err,ntstatus,line,file);
}
/****************************************************************************
Create an error packet from errno.
****************************************************************************/
int unix_error_packet(char *outbuf,int def_class,uint32 def_code, NTSTATUS def_status, int line, const char *file)
{
int eclass=def_class;
int ecode=def_code;
NTSTATUS ntstatus = def_status;
int i=0;
if (errno != 0) {
DEBUG(3,("unix_error_packet: error string = %s\n",strerror(errno)));
while (unix_dos_nt_errmap[i].dos_class != 0) {
if (unix_dos_nt_errmap[i].unix_error == errno) {
eclass = unix_dos_nt_errmap[i].dos_class;
ecode = unix_dos_nt_errmap[i].dos_code;
ntstatus = unix_dos_nt_errmap[i].nt_error;
break;
}
i++;
}
}
return error_packet(outbuf,eclass,ecode,ntstatus,line,file);
}
/****************************************************************************
Create an error packet. Normally called using the ERROR() macro.
Setting eclass and ecode only and status to NT_STATUS_OK forces DOS errors.
Setting status only and eclass and ecode to zero forces NT errors.
If the override errors are set they take precedence over any passed in values.
****************************************************************************/
int error_packet(char *outbuf, uint8 eclass, uint32 ecode, NTSTATUS ntstatus, int line, const char *file)
{
int outsize = set_message(outbuf,0,0,True);
BOOL force_nt_status = False;
BOOL force_dos_status = False;
if (override_ERR_class != SMB_SUCCESS || !NT_STATUS_IS_OK(override_ERR_ntstatus)) {
eclass = override_ERR_class;
ecode = override_ERR_code;
ntstatus = override_ERR_ntstatus;
override_ERR_class = SMB_SUCCESS;
override_ERR_code = 0;
override_ERR_ntstatus = NT_STATUS_OK;
}
if (eclass == (uint8)-1) {
force_nt_status = True;
} else if (NT_STATUS_IS_INVALID(ntstatus)) {
force_dos_status = True;
}
if (force_nt_status || (!force_dos_status && lp_nt_status_support() && (global_client_caps & CAP_STATUS32))) {
/* We're returning an NT error. */
if (NT_STATUS_V(ntstatus) == 0 && eclass) {
ntstatus = dos_to_ntstatus(eclass, ecode);
}
SIVAL(outbuf,smb_rcls,NT_STATUS_V(ntstatus));
SSVAL(outbuf,smb_flg2, SVAL(outbuf,smb_flg2)|FLAGS2_32_BIT_ERROR_CODES);
DEBUG(3,("error packet at %s(%d) cmd=%d (%s) %s\n",
file, line,
(int)CVAL(outbuf,smb_com),
smb_fn_name(CVAL(outbuf,smb_com)),
nt_errstr(ntstatus)));
} else {
/* We're returning a DOS error only. */
if (eclass == 0 && NT_STATUS_V(ntstatus)) {
ntstatus_to_dos(ntstatus, &eclass, &ecode);
}
SSVAL(outbuf,smb_flg2, SVAL(outbuf,smb_flg2)&~FLAGS2_32_BIT_ERROR_CODES);
SSVAL(outbuf,smb_rcls,eclass);
SSVAL(outbuf,smb_err,ecode);
DEBUG(3,("error packet at %s(%d) cmd=%d (%s) eclass=%d ecode=%d\n",
file, line,
(int)CVAL(outbuf,smb_com),
smb_fn_name(CVAL(outbuf,smb_com)),
eclass,
ecode));
}
return outsize;
}
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