/*-GNU-GPL-BEGIN-*
nepim - network pipemeter
Copyright (C) 2005 Everton da Silva Marques

nepim 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, or (at your option)
any later version.

nepim 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 nepim; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*-GNU-GPL-END-*/


/* $Id: udp_header.h,v 1.4 2005/08/11 10:47:13 evertonm Exp $ */


#ifndef NEPIM_UDP_HEADER
#define NEPIM_UDP_HEADER

#include "int.h"

enum { 
  UDP_TYPE_DATA = 0,  /* normal payload for test flows */
  UDP_TYPE_HELLO,     /* initial greeting from client to server */
  UDP_TYPE_KEEPALIVE  /* keepalive packets from non-senders */
};

typedef struct nepim_udp_hdr_t nepim_udp_hdr_t;

struct nepim_udp_hdr_t {
  uint8_t  version;
  uint16_t dst_slot;
  uint16_t src_slot;
  uint8_t  type;
  uint32_t seq;
};

extern const int UDP_HEADER_LEN;

#define UDP_VERSION ('\0')

int nepim_udp_hdr_parse(nepim_udp_hdr_t *hdr, const char *buf, int buf_size);

void nepim_udp_hdr_write(const nepim_udp_hdr_t *hdr, char *buf, int buf_size);

#endif /* NEPIM_UDP_HEADER */