ahdlc.h
资源名称:export.zip [点击查看]
上传用户:hepax88
上传日期:2007-01-03
资源大小:1101k
文件大小:1k
源码类别:
TCP/IP协议栈
开发平台:
Visual C++
- #ifndef _AHDLC_H
- #define _AHDLC_H
- #include "global.h"
- #include "mbuf.h"
- /* Asynch HDLC receiver control block */
- struct ahdlc {
- int escaped; /* Escape char (0x7d) just seen */
- int hunt; /* Flushing input until next flag */
- struct mbuf *inframe; /* Current frame being reassembled */
- int maxsize; /* Maximum packet size */
- uint16 fcs; /* current CRC value */
- int32 rxframes; /* Valid frames received */
- int32 aborts; /* Aborts seen */
- int32 toobigs; /* Frames larger than maxsize */
- int32 crcerrs; /* Frames with CRC errors */
- int32 runts; /* Frames shorter than 2 bytes */
- };
- #define HDLC_ESC_ASYNC 0x7d /* Escapes special chars (0x7d, 0x7e) */
- #define HDLC_FLAG 0x7e /* Ends each frame */
- #define HDLC_ESC_COMPL 0x20 /* XORed with special chars in data */
- void init_hdlc(struct ahdlc *,int);
- struct mbuf *ahdlcrx(struct ahdlc *,uint8);
- struct mbuf *ahdlctx(struct mbuf *);
- #endif /* _AHDLC_H */