packet_parse.h

Linux下的多协议即时通讯程序源代码

/**
 * @file packet_parse.h
 *
 * purple
 *
 * Purple is the legal property of its developers, whose names are too numerous
 * to list here.  Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _QQ_PACKET_PARSE_H_
#define _QQ_PACKED_PARSE_H_

#include <glib.h>

/* According to "UNIX Network Programming", all TCP/IP implementations
 * must support a minimum IP datagram size of 576 bytes, regardless of the MTU.
 * Assuming a 20 byte IP header and 8 byte UDP header, this leaves 548 bytes 
 * as a safe maximum size for UDP messages.
 *
 * TCP allows packet 64K
 */
#define MAX_PACKET_SIZE 65535

gint read_packet_b(guint8 *buf, guint8 **cursor, gint buflen, guint8 *b);
gint read_packet_w(guint8 *buf, guint8 **cursor, gint buflen, guint16 *w);
gint read_packet_dw(guint8 *buf, guint8 **cursor, gint buflen, guint32 *dw);
gint read_packet_data(guint8 *buf, guint8 **cursor, gint buflen, guint8 *data, gint datalen);
gint create_packet_b(guint8 *buf, guint8 **cursor, guint8 b);
gint create_packet_w(guint8 *buf, guint8 **cursor, guint16 w);
gint create_packet_dw(guint8 *buf, guint8 **cursor, guint32 dw);
gint create_packet_data(guint8 *buf, guint8 **cursor, guint8 *data, gint datalen);

#endif