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65 lines
2.2 KiB
65 lines
2.2 KiB
/** |
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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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