mirror of
https://github.com/samba-team/samba.git
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9254bb4ef1
with Volker. Mostly making sure we have data on the incoming packet type, not stored in the smb header. Jeremy. (This used to be commit c4e5a505043965eec77b5bb9bc60957e8f3b97c8)
170 lines
5.1 KiB
C
170 lines
5.1 KiB
C
/*
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Unix SMB/CIFS implementation.
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error packet handling
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Copyright (C) Andrew Tridgell 1992-1998
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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/* From lib/error.c */
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extern struct unix_error_map unix_dos_nt_errmap[];
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extern uint32 global_client_caps;
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bool use_nt_status(void)
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{
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return lp_nt_status_support() && (global_client_caps & CAP_STATUS32);
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}
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/****************************************************************************
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Create an error packet. Normally called using the ERROR() macro.
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Setting eclass and ecode only and status to NT_STATUS_OK forces DOS errors.
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Setting status only and eclass and ecode to zero forces NT errors.
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If the override errors are set they take precedence over any passed in values.
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****************************************************************************/
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void error_packet_set(char *outbuf, uint8 eclass, uint32 ecode, NTSTATUS ntstatus, int line, const char *file)
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{
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bool force_nt_status = False;
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bool force_dos_status = False;
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if (eclass == (uint8)-1) {
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force_nt_status = True;
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} else if (NT_STATUS_IS_DOS(ntstatus)) {
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force_dos_status = True;
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}
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if (force_nt_status || (!force_dos_status && lp_nt_status_support() && (global_client_caps & CAP_STATUS32))) {
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/* We're returning an NT error. */
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if (NT_STATUS_V(ntstatus) == 0 && eclass) {
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ntstatus = dos_to_ntstatus(eclass, ecode);
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}
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SIVAL(outbuf,smb_rcls,NT_STATUS_V(ntstatus));
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SSVAL(outbuf,smb_flg2, SVAL(outbuf,smb_flg2)|FLAGS2_32_BIT_ERROR_CODES);
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DEBUG(3,("error packet at %s(%d) cmd=%d (%s) %s\n",
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file, line,
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(int)CVAL(outbuf,smb_com),
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smb_fn_name(CVAL(outbuf,smb_com)),
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nt_errstr(ntstatus)));
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} else {
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/* We're returning a DOS error only. */
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if (NT_STATUS_IS_DOS(ntstatus)) {
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eclass = NT_STATUS_DOS_CLASS(ntstatus);
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ecode = NT_STATUS_DOS_CODE(ntstatus);
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} else if (eclass == 0 && NT_STATUS_V(ntstatus)) {
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ntstatus_to_dos(ntstatus, &eclass, &ecode);
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}
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SSVAL(outbuf,smb_flg2, SVAL(outbuf,smb_flg2)&~FLAGS2_32_BIT_ERROR_CODES);
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SSVAL(outbuf,smb_rcls,eclass);
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SSVAL(outbuf,smb_err,ecode);
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DEBUG(3,("error packet at %s(%d) cmd=%d (%s) eclass=%d ecode=%d\n",
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file, line,
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(int)CVAL(outbuf,smb_com),
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smb_fn_name(CVAL(outbuf,smb_com)),
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eclass,
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ecode));
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}
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}
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int error_packet(char *outbuf, uint8 eclass, uint32 ecode, NTSTATUS ntstatus, int line, const char *file)
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{
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int outsize = srv_set_message(outbuf,0,0,True);
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error_packet_set(outbuf, eclass, ecode, ntstatus, line, file);
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return outsize;
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}
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void reply_nt_error(struct smb_request *req, NTSTATUS ntstatus,
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int line, const char *file)
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{
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TALLOC_FREE(req->outbuf);
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reply_outbuf(req, 0, 0);
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error_packet_set((char *)req->outbuf, 0, 0, ntstatus, line, file);
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}
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void reply_force_nt_error(struct smb_request *req, NTSTATUS ntstatus,
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int line, const char *file)
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{
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TALLOC_FREE(req->outbuf);
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reply_outbuf(req, 0, 0);
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error_packet_set((char *)req->outbuf, -1, -1, ntstatus, line, file);
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}
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void reply_dos_error(struct smb_request *req, uint8 eclass, uint32 ecode,
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int line, const char *file)
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{
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TALLOC_FREE(req->outbuf);
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reply_outbuf(req, 0, 0);
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error_packet_set((char *)req->outbuf, eclass, ecode, NT_STATUS_OK, line,
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file);
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}
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void reply_both_error(struct smb_request *req, uint8 eclass, uint32 ecode,
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NTSTATUS status, int line, const char *file)
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{
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TALLOC_FREE(req->outbuf);
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reply_outbuf(req, 0, 0);
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error_packet_set((char *)req->outbuf, eclass, ecode, status,
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line, file);
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}
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void reply_openerror(struct smb_request *req, NTSTATUS status)
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{
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if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_COLLISION)) {
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/*
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* We hit an existing file, and if we're returning DOS
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* error codes OBJECT_NAME_COLLISION would map to
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* ERRDOS/183, we need to return ERRDOS/80, see bug
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* 4852.
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*/
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reply_botherror(req, NT_STATUS_OBJECT_NAME_COLLISION,
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ERRDOS, ERRfilexists);
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} else {
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reply_nterror(req, status);
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}
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}
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void reply_unix_error(struct smb_request *req, uint8 defclass, uint32 defcode,
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NTSTATUS defstatus, int line, const char *file)
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{
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int eclass=defclass;
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int ecode=defcode;
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NTSTATUS ntstatus = defstatus;
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int i=0;
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TALLOC_FREE(req->outbuf);
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reply_outbuf(req, 0, 0);
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if (errno != 0) {
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DEBUG(3,("unix_error_packet: error string = %s\n",
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strerror(errno)));
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while (unix_dos_nt_errmap[i].dos_class != 0) {
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if (unix_dos_nt_errmap[i].unix_error == errno) {
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eclass = unix_dos_nt_errmap[i].dos_class;
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ecode = unix_dos_nt_errmap[i].dos_code;
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ntstatus = unix_dos_nt_errmap[i].nt_error;
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break;
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}
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i++;
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}
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}
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error_packet_set((char *)req->outbuf, eclass, ecode, ntstatus,
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line, file);
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}
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