rrmask.h

用于嵌入式系统的TCP/IP协议栈及若干服务

/*
*            Copyright (c) 1998-2001 by NETsilicon Inc.
*
*  This software is copyrighted by and is the sole property of
*  NETsilicon.  All rights, title, ownership, or other interests
*  in the software remain the property of NETsilicon.  This
*  software may only be used in accordance with the corresponding
*  license agreement.  Any unauthorized use, duplication, transmission,
*  distribution, or disclosure of this software is expressly forbidden.
*
*  This Copyright notice may not be removed or modified without prior
*  written consent of NETsilicon.
*
*  NETsilicon, reserves the right to modify this software
*  without notice.
*
*  NETsilicon
*  411 Waverley Oaks Road                  USA 781.647.1234
*  Suite 227                               http://www.netsilicon.com
*  Waltham, MA 02452                       [e-mail]
*
*************************************************************************
*  $Name: Fusion 6.52 Fusion 6.51 $
*  $Date: 2001/09/20 10:32:09 $
*  $Source: M:/psisrc/routing/incl/rcs/rrmask.h $
*  $Revision: 1.2 $
*************************************************************************
*  File Description: definitions for anything that uses port masks  
*************************************************************************/
#include "ipport.h"

/****************************************
if single, port number is encoded in m:
ie, port 1 is 1 port 2 is 2, etc.

else bit number equals port number, ie. bit 1 (not 0)
refers to port 1, ports 1&2 has mask of 6.
****************************************/
/* used for mcast forwarding circuit mask */
typedef struct	rrforward_mask{
	union{
		int		pid;
		rrbyte		m[(RR_MAX_INTF >>3)+1];
	}u;
	rrbyte		single;
}rrfwd_mask;


#define RRMSK_CSET(xm,xcid) {\
  (xm)->u.m[xcid >>3] |= 1 << (xcid & 7);\
}
#define RRMSK_CCLR(xm,xcid) {\
  (xm)->u.m[xcid >>3] &= ~(1<<(xcid & 7));\
}
#define RRMSK_ALLCLR(xm)	 {\
	int xx; \
	for(xx = 0; xx <= (RR_MAX_INTF >>3);xx++)(xm)->u.m[xx] = 0; \
}
#define RRMSK_CIS_SET(xm,xcid) ((xm)->u.m[xcid >>3] & (1<<(xcid & 7)) )

/* for each bit set in mb, clear matching bit in ma */
#define RRMSK_MASK_CLRBITS(xma,xmb)	 {\
	int xx; \
	for(xx = 0; xx <= (RR_MAX_INTF >>3);xx++){\
		(xma)->u.m[xx] = (xma)->u.m[xx] & ~(xmb)->u.m[xx]; \
	}\
}

/* ma is and of ma,mb */
#define RRMSK_MASK_AND(xma,xmb)	 {\
	int xx; \
	for(xx = 0; xx <= (RR_MAX_INTF >>3);xx++){\
		(xma)->u.m[xx] = (xma)->u.m[xx] & (xmb)->u.m[xx]; \
	}\
}

/* ma is or of ma,mb */
#define RRMSK_MASK_OR(xma,xmb)	 {\
	int xx; \
	for(xx = 0; xx <= (RR_MAX_INTF >>3);xx++){\
		(xma)->u.m[xx] = (xma)->u.m[xx] | (xmb)->u.m[xx]; \
	}\
}

/* copy b to a */
#define RRMSK_COPY(xma,xmb)	 {\
	rrCopyMem(xma,xmb,sizeof(rrfwd_mask));\
}

/* test for empty mask, sets nonempty flag */
#define RRMSK_EMPTY_TEST(xm,xnonempty)	{\
	int xx; \
	xnonempty = 0; \
	for(xx = 0; xx <= (RR_MAX_INTF >>3);xx++){\
		if((xm)->u.m[xx]) {\
			xnonempty = 1;\
			break;\
		}\
	}\
}	

/* find first port with member set */
#define RRMSK_FIRST(xm,xfirst) {\
	int xx,yy; \
	xfirst = -1;\
	if((xm)->single)\
		xfirst = (xm)->u.pid;\
	else for(xx = 0; xx <= (RR_MAX_INTF >>3);xx++){\
		if((xm)->u.m[xx]) {\
			for(yy = 0; yy <8;yy++){\
				if((xm)->u.m[xx] & (1<<yy)){\
					xfirst = (xx <<3) +yy;\
					break;\
				}\
			}\
			break;\
		}\
	}\
}