rfc2429.h

来自「基于osip、eXosip、speex、ffmpeg的VoIP源代码」· C头文件 代码 · 共 51 行

/*
  The mediastreamer library aims at providing modular media processing and I/O
	for linphone, but also for any telephony application.
  Copyright (C) 2001  Simon MORLAT [e-mail]
  										
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/


#ifndef rfc2429_h
#define rfc2429_h

#define MAKE_MASK(bits)		( (1<<(bits)) -1 )

static inline unsigned int rfc2429_get_P(const uint8_t *header){
	return (header[0]>>2) & 0x1;
}

static inline void rfc2429_set_P(uint8_t *header, bool_t val){
	header[0]=header[0] | ( (val&0x1)<<2);
}

static inline unsigned int rfc2429_get_V(const uint8_t *header){
	return (header[0]>>1) & 0x1;
}

static inline unsigned int rfc2429_get_PLEN(const uint8_t *header){
	unsigned short *p=(unsigned short*)header;
	return (ntohs(p[0])>>3) & MAKE_MASK(6);
}

static inline unsigned int rfc2429_get_PEBIT(const uint8_t *header){
	unsigned short *p=(unsigned short*)header;
	return ntohs(p[0]) & MAKE_MASK(3);
}


#endif