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sana2packetmagic.h
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C/C++ Source or Header
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1992-05-06
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2KB
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90 lines
#ifndef SANA2_SANA2PACKETMAGIC_H
#define SANA2_SANA2PACKETMAGIC_H 1
/*
** $Filename: sana2packetmagic.h $
** $Release: Developer Information$
** $Revision: 1.2 $
** $Date: 91/05/08 $
**
** Defined types of magic for the Sana2PacketType structure.
**
** (C) Copyright 1991 Commodore-Amiga Inc.
** All Rights Reserved
*/
/*
** Contributions from:
** Raymond S. Brand, rsbx@cbmvax.commodore.com, (215) 431-9100
** Martin Hunt, martin@cbmvax.commodore.com, (215) 431-9100
** Perry Kivolowitz, ASDG Incorporated, (608) 273-6585
*/
#ifndef SANA2_SANA2DEVICE_H
#include <sana2/sana2device.h>
#endif /* !SANA2_SANA2DEVICE_H */
/*
* The SANA-II Sana2PacketType structure Magic value is an unsigned 32
* number. The upper 16 bits identify the type of network wire to which
* the Magic value applies and the lower 16 bits identify the particular
* type of magic.
*/
/*
* defined types of ethernet magic
*/
#define S2MAGIC_ETHERNET_E2 ((((S2WireType_Ethernet)&0xffff)<<16)|0x0000)
/*
* For ethernet, this is the default case. Mask is ignored, Length is 2,
* Match points to a UWORD to match against the type field of the packet.
*/
#define S2MAGIC_ETHERNET_8023 ((((S2WireType_Ethernet)&0xffff)<<16)|0x0001)
/*
* The caller is declaring his intent to receive any of the valid 802.3
* ethernet packet types. The Match and Mask fields are ignored, Length
* is 0.
*
* SANA-II ethernet driver writers need to support a read queue for 802.3
* packets separate from packets of any non-802.3 type.
*
* A possible flow through an ethernet driver's read interrupt routine
* might look like the following:
*
* ...
*
* sniff packet type...
*
* if (NoSpecificReadWaiting())
* {
* if (IsAn802() && 802ReadWaiting())
* {
* Return802();
* }
* else
* {
* if (OrphanReadWaiting())
* {
* ReturnOrphan();
* }
* else
* {
* DropPacket();
* }
* }
* }
* else
* {
* ReturnSpecificPacket();
* }
*
* ...
*
*/
#endif /* SANA2_SANA2PACKETMAGIC_H */