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messaging: Define a binary format for message headers

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Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This commit is contained in:
Volker Lendecke 2014-09-16 14:09:35 +02:00 committed by Stefan Metzmacher
parent b47db91baf
commit d80193ca36
3 changed files with 79 additions and 0 deletions
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41
source3/lib/messages_util.c Normal file
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@ -0,0 +1,41 @@
/*
* Unix SMB/CIFS implementation.
* Samba internal messaging functions
* Copyright (C) 2013 by Volker Lendecke
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "lib/util/samba_util.h"
#include "librpc/gen_ndr/server_id.h"
#include "lib/util/byteorder.h"
#include "messages_util.h"
void message_hdr_put(uint8_t buf[MESSAGE_HDR_LENGTH], uint32_t msg_type,
struct server_id src, struct server_id dst)
{
server_id_put(buf, dst);
server_id_put(buf + 24, src);
SIVAL(buf, 48, msg_type);
}
void message_hdr_get(uint32_t *msg_type, struct server_id *src,
struct server_id *dst,
const uint8_t buf[MESSAGE_HDR_LENGTH])
{
server_id_get(dst, buf);
server_id_get(src, buf + 24);
*msg_type = IVAL(buf, 48);
}

33
source3/lib/messages_util.h Normal file
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@ -0,0 +1,33 @@
/*
* Unix SMB/CIFS implementation.
* Samba internal messaging functions
* Copyright (C) 2013 by Volker Lendecke
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _MESSAGES_UTIL_H_
#define _MESSAGES_UTIL_H_
struct message_hdr;
#define MESSAGE_HDR_LENGTH 52
void message_hdr_put(uint8_t buf[MESSAGE_HDR_LENGTH], uint32_t msg_type,
struct server_id src, struct server_id dst);
void message_hdr_get(uint32_t *msg_type, struct server_id *src,
struct server_id *dst,
const uint8_t buf[MESSAGE_HDR_LENGTH]);
#endif

5
source3/wscript_build
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@ -313,6 +313,11 @@ bld.SAMBA3_LIBRARY('messages_dgm',
deps='talloc UNIX_MSG POLL_FUNCS_TEVENT samba-debug',
private_library=True)
bld.SAMBA3_LIBRARY('messages_util',
source='''lib/messages_util.c''',
deps='samba-util',
private_library=True)
bld.SAMBA3_SUBSYSTEM('samba3core',
source='''lib/messages.c
lib/util_cluster.c