ethloop.h

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/* Embedded Xinu, Copyright (C) 2009.  All rights reserved. */

#ifndef _ETHLOOP_H_
#define _ETHLOOP_H_


#define ELOOP_MTU          1500
#define ELOOP_LINKHDRSIZE  ETH_HDR_LEN

#define ELOOP_BUFSIZE      ELOOP_MTU + ELOOP_LINKHDRSIZE
#define ELOOP_NBUF         100

#define ELOOP_CTRL_GETHOLD  1
#define ELOOP_CTRL_SETFLAG  2
#define ELOOP_CTRL_CLRFLAG  3

#define ELOOP_FLAG_HOLDNXT  0x01  
#define ELOOP_FLAG_DROPNXT  0x04  
#define ELOOP_FLAG_DROPALL  0x08  
#define ELOOP_STATE_FREE        0
#define ELOOP_STATE_ALLOC       1

struct ethloop
{
    int state;                      
    struct dentry *dev;                    
    int poolid;                     
    byte flags;                    
    /* Packet queue */
    int index;                  
    sid32   sem;              
    int count;                      
    char *buffer[ELOOP_NBUF];   
    int pktlen[ELOOP_NBUF];         
    /* Hold packet */
    sid32   hsem;                 
    char *hold;                 
    int holdlen;                    
    /* Statistics */
    uint32 nout;                      
};

extern struct ethloop elooptab[];

/* Driver functions */
devcall ethloopInit(struct dentry *);
devcall ethloopOpen(struct dentry *);
devcall ethloopClose(struct dentry *);
devcall ethloopRead(struct dentry *, void *, uint32);
devcall ethloopWrite(struct dentry *, void *, uint32);
devcall ethloopControl(struct dentry *, int, int32, int32);

#endif                          /* _ETHLOOP_H_ */