realtek的8186芯片ADSL路由AP源代码

				/*
				 * iob.h
				 *
				 * This file is for buffer management of SerComm TCP/IP
				 *
				 * Last Revised: 11/8/2003
				 * History:
				 *      11/8/2003 Casey   Created.
				 *
				 */
				
				#ifndef _IOB_H_
				#define _IOB_H_
				
				#ifndef NUM_OF_IOB
				#define NUM_OF_IOB		64     /* number of buffer */
				#endif /* NUM_OF_BUF */
				
				
				#define IOB_OFFSET  14      /* space reserved */
				#define IOB_HDR_SZ	8
				#define IOB_DATASZ	2048-IOB_HDR_SZ    /* buffer size */
				
				/* buffer structure */ 
				typedef struct {
					void * psNextIOB;
					unsigned short	dwLength;
					unsigned short	dwOffset;
					unsigned char dbData[IOB_DATASZ];
				} IOB;
				
				
				/* free buffer pool */
				typedef struct {
				    char    		*head;
				    unsigned int	count;
				} IOB_POOL;
				
				
				/* Buffer management */
				#define IOB_PKT_PTR(p)		((char *)p+IOB_HDR_SZ+((IOB *)p)->dwOffset)
				#define IOB_PKT_OFFSET(p)	(((IOB *)p)->dwOffset)
				#define IOB_PKT_LEN(p)		(((IOB *)p)->dwLength)
				#define IOB_NEXT(p)			(((IOB *)p)->psNextIOB)
				  
				
				/* exported function prototypes */
				extern int initIOB(void);
				extern char *IOBGetHdr(char *mp);
				extern char *getIOB(void);
				extern int freeIOB(char *iob);
				extern int IOBCopy(char *src, char *dst);
				
				/* for debug */
				extern void IOBStatus(void);
				
				#endif /* _IOB_H_ */