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66 lines
2.2 KiB
66 lines
2.2 KiB
6 years ago
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/**
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* @file ethloop.h
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*
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* $Id: ethloop.h 2076 2009-09-24 23:05:39Z brylow $
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*/
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/* Embedded Xinu, Copyright (C) 2009. All rights reserved. */
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#ifndef _ETHLOOP_H_
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#define _ETHLOOP_H_
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#define ELOOP_MTU 1500
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#define ELOOP_LINKHDRSIZE ETH_HDR_LEN
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#define ELOOP_BUFSIZE ELOOP_MTU + ELOOP_LINKHDRSIZE
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#define ELOOP_NBUF 100
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#define ELOOP_CTRL_GETHOLD 1
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#define ELOOP_CTRL_SETFLAG 2
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#define ELOOP_CTRL_CLRFLAG 3
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#define ELOOP_FLAG_HOLDNXT 0x01 /**< place next written pkt in hold */
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#define ELOOP_FLAG_DROPNXT 0x04 /**< drop next written pkt */
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#define ELOOP_FLAG_DROPALL 0x08 /**< drop all written pkts */
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#define ELOOP_STATE_FREE 0
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#define ELOOP_STATE_ALLOC 1
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/**
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* Loopback device control block
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*/
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struct ethloop
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{
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int state; /**< device state */
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struct dentry *dev; /**< device table entry */
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int poolid; /**< poolid for the buffer pool */
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byte flags; /**< flags */
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/* Packet queue */
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int index; /**< index of first packet in buffer */
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sid32 sem; /**< number of packets in buffer */
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int count; /**< number of packets in buffer */
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char *buffer[ELOOP_NBUF]; /**< input buffer */
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int pktlen[ELOOP_NBUF]; /**< length of packet in buffer */
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/* Hold packet */
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sid32 hsem; /**< number of held packets */
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char *hold; /**< hold buffer */
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int holdlen; /**< length of packet in hold buffer */
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/* Statistics */
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uint32 nout; /**< number of packets written */
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};
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extern struct ethloop elooptab[];
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/* Driver functions */
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devcall ethloopInit(struct dentry *);
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devcall ethloopOpen(struct dentry *);
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devcall ethloopClose(struct dentry *);
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devcall ethloopRead(struct dentry *, void *, uint32);
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devcall ethloopWrite(struct dentry *, void *, uint32);
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devcall ethloopControl(struct dentry *, int, int32, int32);
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#endif /* _ETHLOOP_H_ */
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