/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
-/* these can be set by some functions to override the error codes */
-int unix_ERR_class=SMB_SUCCESS;
-int unix_ERR_code=0;
-
-/****************************************************************************
- Create an error packet from a cached error.
-****************************************************************************/
-
-int cached_error_packet(char *outbuf,files_struct *fsp,int line,const char *file)
+bool use_nt_status(void)
{
- write_bmpx_struct *wbmpx = fsp->wbmpx_ptr;
-
- int32 eclass = wbmpx->wr_errclass;
- int32 err = wbmpx->wr_error;
-
- /* We can now delete the auxiliary struct */
- free((char *)wbmpx);
- fsp->wbmpx_ptr = NULL;
- return error_packet(outbuf,NT_STATUS_OK,eclass,err,line,file);
+ return lp_nt_status_support() && (global_client_caps & CAP_STATUS32);
}
-struct
-{
- int unixerror;
- int smbclass;
- int smbcode;
-} unix_smb_errmap[] =
-{
- {EPERM,ERRDOS,ERRnoaccess},
- {EACCES,ERRDOS,ERRnoaccess},
- {ENOENT,ERRDOS,ERRbadfile},
- {ENOTDIR,ERRDOS,ERRbadpath},
- {EIO,ERRHRD,ERRgeneral},
- {EBADF,ERRSRV,ERRsrverror},
- {EINVAL,ERRSRV,ERRsrverror},
- {EEXIST,ERRDOS,ERRfilexists},
- {ENFILE,ERRDOS,ERRnofids},
- {EMFILE,ERRDOS,ERRnofids},
- {ENOSPC,ERRHRD,ERRdiskfull},
-#ifdef EDQUOT
- {EDQUOT,ERRHRD,ERRdiskfull},
-#endif
-#ifdef ENOTEMPTY
- {ENOTEMPTY,ERRDOS,ERRnoaccess},
-#endif
-#ifdef EXDEV
- {EXDEV,ERRDOS,ERRdiffdevice},
-#endif
- {EROFS,ERRHRD,ERRnowrite},
- {0,0,0}
-};
-
/****************************************************************************
- create an error packet from errno
-****************************************************************************/
-int unix_error_packet(char *outbuf,int def_class,uint32 def_code,
- int line, const char *file)
-{
- int eclass=def_class;
- int ecode=def_code;
- int i=0;
-
- if (unix_ERR_class != SMB_SUCCESS) {
- eclass = unix_ERR_class;
- ecode = unix_ERR_code;
- unix_ERR_class = SMB_SUCCESS;
- unix_ERR_code = 0;
- } else {
- while (unix_smb_errmap[i].smbclass != 0) {
- if (unix_smb_errmap[i].unixerror == errno) {
- eclass = unix_smb_errmap[i].smbclass;
- ecode = unix_smb_errmap[i].smbcode;
- break;
- }
- i++;
- }
- }
+ Create an error packet. Normally called using the ERROR() macro.
- return error_packet(outbuf,NT_STATUS_OK,eclass,ecode,line,file);
-}
+ Setting eclass and ecode to zero and status to a valid NT error will
+ reply with an NT error if the client supports CAP_STATUS32, otherwise
+ it maps to and returns a DOS error if the client doesn't support CAP_STATUS32.
+ This is the normal mode of calling this function via reply_nterror(req, status).
+ Setting eclass and ecode to non-zero and status to NT_STATUS_OK (0) will map
+ from a DOS error to an NT error and reply with an NT error if the client
+ supports CAP_STATUS32, otherwise it replies with the given DOS error.
+ This mode is currently not used in the server.
-/****************************************************************************
- create an error packet. Normally called using the ERROR() macro
+ Setting both eclass, ecode and status to non-zero values allows a non-default
+ mapping from NT error codes to DOS error codes, and will return one or the
+ other depending on the client supporting CAP_STATUS32 or not. This is the
+ path taken by calling reply_botherror(req, eclass, ecode, status);
+
+ Setting status to NT_STATUS_DOS(eclass, ecode) forces DOS errors even if the
+ client supports CAP_STATUS32. This is the path taken to force a DOS error
+ reply by calling reply_force_doserror(req, eclass, ecode).
+
+ Setting status only and eclass to -1 forces NT errors even if the client
+ doesn't support CAP_STATUS32. This mode is currently never used in the
+ server.
****************************************************************************/
-int error_packet(char *outbuf,NTSTATUS ntstatus,
- uint8 eclass,uint32 ecode,int line, const char *file)
+
+void error_packet_set(char *outbuf, uint8 eclass, uint32 ecode, NTSTATUS ntstatus, int line, const char *file)
{
- int outsize = set_message(outbuf,0,0,True);
- extern uint32 global_client_caps;
+ bool force_nt_status = False;
+ bool force_dos_status = False;
+
+ if (eclass == (uint8)-1) {
+ force_nt_status = True;
+ } else if (NT_STATUS_IS_DOS(ntstatus)) {
+ force_dos_status = True;
+ }
- if (errno != 0)
- DEBUG(3,("error string = %s\n",strerror(errno)));
-
- if (global_client_caps & CAP_STATUS32) {
+ 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);
}
file, line,
(int)CVAL(outbuf,smb_com),
smb_fn_name(CVAL(outbuf,smb_com)),
- get_nt_error_msg(ntstatus)));
- return outsize;
- }
+ nt_errstr(ntstatus)));
+ } else {
+ /* We're returning a DOS error only,
+ * nt_status_to_dos() pulls DOS error codes out of the
+ * NTSTATUS */
+ if (NT_STATUS_IS_DOS(ntstatus) || (eclass == 0 && NT_STATUS_V(ntstatus))) {
+ ntstatus_to_dos(ntstatus, &eclass, &ecode);
+ }
- 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));
}
+}
- SSVAL(outbuf,smb_flg2, SVAL(outbuf,smb_flg2)&~FLAGS2_32_BIT_ERROR_CODES);
- SSVAL(outbuf,smb_rcls,eclass);
- SSVAL(outbuf,smb_err,ecode);
+int error_packet(char *outbuf, uint8 eclass, uint32 ecode, NTSTATUS ntstatus, int line, const char *file)
+{
+ int outsize = srv_set_message(outbuf,0,0,True);
+ error_packet_set(outbuf, eclass, ecode, ntstatus, line, file);
+ return outsize;
+}
- 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));
+void reply_nt_error(struct smb_request *req, NTSTATUS ntstatus,
+ int line, const char *file)
+{
+ TALLOC_FREE(req->outbuf);
+ reply_outbuf(req, 0, 0);
+ error_packet_set((char *)req->outbuf, 0, 0, ntstatus, line, file);
+}
- return outsize;
+/****************************************************************************
+ Forces a DOS error on the wire.
+****************************************************************************/
+
+void reply_force_dos_error(struct smb_request *req, uint8 eclass, uint32 ecode,
+ int line, const char *file)
+{
+ TALLOC_FREE(req->outbuf);
+ reply_outbuf(req, 0, 0);
+ error_packet_set((char *)req->outbuf,
+ eclass, ecode,
+ NT_STATUS_DOS(eclass, ecode),
+ line,
+ file);
+}
+
+void reply_both_error(struct smb_request *req, uint8 eclass, uint32 ecode,
+ NTSTATUS status, int line, const char *file)
+{
+ TALLOC_FREE(req->outbuf);
+ reply_outbuf(req, 0, 0);
+ error_packet_set((char *)req->outbuf, eclass, ecode, status,
+ line, file);
+}
+
+void reply_openerror(struct smb_request *req, NTSTATUS status)
+{
+ if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_COLLISION)) {
+ /*
+ * We hit an existing file, and if we're returning DOS
+ * error codes OBJECT_NAME_COLLISION would map to
+ * ERRDOS/183, we need to return ERRDOS/80, see bug
+ * 4852.
+ */
+ reply_botherror(req, NT_STATUS_OBJECT_NAME_COLLISION,
+ ERRDOS, ERRfilexists);
+ } else if (NT_STATUS_EQUAL(status, NT_STATUS_TOO_MANY_OPENED_FILES)) {
+ /* EMFILE always seems to be returned as a DOS error.
+ * See bug 6837. NOTE this forces a DOS error on the wire
+ * even though it's calling reply_nterror(). */
+ reply_force_doserror(req, ERRDOS, ERRnofids);
+ } else {
+ reply_nterror(req, status);
+ }
}
git.samba.org / abartlet / samba.git / .git / blobdiff