forked from KolibriOS/kolibrios
480 lines
21 KiB
PHP
480 lines
21 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; ETHERNET.INC ;;
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;; ;;
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;; Ethernet network layer for Menuet OS ;;
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;; ;;
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;; Version 0.4 22 September 2003 ;;
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;; ;;
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;; This file contains the following: ;;
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;; PCI bus scanning for valid devices ;;
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;; Table of supported ethernet drivers ;;
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;; Code to identify and activate a supported driver ;;
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;; ARP handler ;;
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;; Driver interface to the IP layer ;;
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;; Gateway support ;;
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;; ;;
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;; Individual driver files are included here ;;
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;; ;;
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;; The PCI bus scanning code was ported from the etherboot ;;
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;; 5.0.6 project. The copyright statement for that code is ;;
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;; ;;
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;; GNU GENERAL PUBLIC LICENSE ;;
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;; Version 2, June 1991 ;;
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;; ;;
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;; remaining parts Copyright 2002 Mike Hibbett ;;
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;; mikeh@oceanfree.net ;;
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;; ;;
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;; See file COPYING for details ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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;********************************************************************
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; Interface
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; ethernet_driver called by stack_handler in stack.inc
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; eth_probe called by app_stack_handler in stack.inc
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;
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;********************************************************************
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ETHER_IP equ 0x0008 ; Reversed from 0800 for intel
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ETHER_ARP equ 0x0608 ; Reversed from 0806 for intel
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ETHER_RARP equ 0x3580
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struc ETH_FRAME
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{ .DstMAC dp ? ;destination MAC-address [6 bytes]
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.SrcMAC dp ? ;source MAC-address [6 bytes]
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.Type dw ? ;type of the upper-layer protocol [2 bytes]
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.Data db ? ;data [46-1500 bytes]
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}
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virtual at Ether_buffer
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ETH_FRAME ETH_FRAME
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end virtual
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; Some useful information on data structures
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; Ethernet Packet - ARP Request example
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;
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; 0 1 2 3
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; 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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;
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; | Dest H/W Address |
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; | ( 14 byte header ) |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; | | Source H/W Address |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; | |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; | Protocol - ARP 08 06 |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; | H/W Type 00 01 | Protocol Type 08 00 |
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; | ( ARP Request packet ) |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; | HLen 0x06 | PLen 0x04 | OpCode 00 01 |
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; | ( 0001 for request, 0002 for reply ) |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; | Source Hardware Address ( MAC Address ) |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; | | Source IP Address |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; | | Destination Hardware Address |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; | |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; | Destination IP Address |
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; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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; Include individual drivers source files at this point.
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; If you create a new driver, include it below.
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include "drivers/rtl8029.inc"
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include "drivers/i8255x.inc"
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include "drivers/rtl8139.inc"
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include "drivers/3c59x.inc"
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include "drivers/sis900.inc"
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include "drivers/pcnet32.inc"
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include "drivers/rtl8169.inc"
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include "drivers/forcedeth.inc"
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; PCICards
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; ========
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; PCI vendor and hardware types for hardware supported by the above drivers
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; If you add a driver, ensure you update this datastructure, otherwise the
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; card will not be probed.
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; Each driver is defined by 4 double words. These are
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; PCIVendorDevice probeFunction ResetFunction PollFunction transmitFunction
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; The last entry must be kept at all zeros, to indicate the end of the list
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; As a PCI driver may support more than one hardware implementation, there may
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; be several lines which refer to the same functions.
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; The first driver found on the PCI bus will be the one used.
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PCICARDS_ENTRY_SIZE equ 24 ; Size of each PCICARDS entry
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iglobal
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PCICards:
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dd 0x12098086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
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dd 0x10298086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
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dd 0x12298086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
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dd 0x10308086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
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dd 0x24498086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
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dd 0x802910ec, rtl8029_probe, rtl8029_reset, rtl8029_poll, rtl8029_transmit, 0
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dd 0x813910ec, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable ; tested by hidnplayr: works ok
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dd 0x813810ec, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x12111113, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable ; tested by hidnplayr: works ok
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dd 0x13601500, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x13604033, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x13001186, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x13401186, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0xab0613d1, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0xa1171259, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0xa11e1259, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0xab0614ea, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0xab0714ea, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x123411db, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x91301432, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x101202ac, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x0106018a, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x1211126c, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x81391743, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x8139021b, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
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dd 0x816810ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
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dd 0x816910ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
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dd 0x011616ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
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dd 0x43001186, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
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dd 0x816710ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
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dd 0x590010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x592010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x597010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x595010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x595110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x595210b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x900010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x900110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x900410b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x900510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x900610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x900A10b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x905010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x905110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x905510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x905810b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x905A10b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x920010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x980010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x980510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x764610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x505510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x605510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x605610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x5b5710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x505710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x515710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x525710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x656010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x656210b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x656410b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x450010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
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dd 0x09001039, SIS900_probe, SIS900_reset, SIS900_poll, SIS900_transmit, 0
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dd 0x20001022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0
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dd 0x26251022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0
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dd 0x20011022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0
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;dd 0x08031516, mtd80x_probe, mtd80x_reset, mtd80x_poll, mtd80x_transmit, mtd80x_cable
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; following cards are untested
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dd 0x70161039, SIS900_probe, SIS900_reset, SIS900_poll, SIS900_transmit, 0
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;dd 0x08001516, mtd80x_probe, mtd80x_reset, mtd80x_poll, mtd80x_transmit, mtd80x_cable
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;dd 0x08911516, mtd80x_probe, mtd80x_reset, mtd80x_poll, mtd80x_transmit, mtd80x_cable
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dd 0x006610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; nVidia Corporation nForce2 Ethernet Controller
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dd 0x01c310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x00D610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x008610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x008c10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x00e610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x00df10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x005610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x005710de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x003710de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x003810de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x026810de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x026910de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x037210de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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dd 0x037310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
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rb PCICARDS_ENTRY_SIZE ; end of list marker, do not remove
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endg
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uglobal
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;Net-stack's interface's settings
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node_addr: db 0,0,0,0,0,0
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gateway_ip: dd 0
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dns_ip: dd 0
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eth_rx_data_len: dw 0
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eth_status: dd 0
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io_addr: dd 0
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hdrtype: db 0
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vendor_device: dd 0
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pci_data: dd 0
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pci_dev: dd 0
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pci_bus: dd 0
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; These will hold pointers to the selected driver functions
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drvr_probe: dd 0
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drvr_reset: dd 0
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drvr_poll: dd 0
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drvr_transmit: dd 0
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drvr_cable: dd 0
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endg
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iglobal
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broadcast_add: db 0xff,0xff,0xff,0xff,0xff,0xff
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subnet_mask: dd 0x00ffffff ; 255.255.255.0
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endg
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include "arp.inc" ;arp-protocol functions
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include "pci.inc" ;PCI bus access functions
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;***************************************************************************
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; Function
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; eth_tx
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;
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; Description
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; Looks at the NET1OUT_QUEUE for data to send.
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; Stores that destination IP in a location used by the tx routine
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; Looks up the MAC address in the ARP table; stores that where
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; the tx routine can get it
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; Get the length of the data. Store that where the tx routine wants it
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; Call tx
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; Places buffer on empty queue when the tx routine finished
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;
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;***************************************************************************
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proc eth_tx stdcall uses ebx esi edi
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local MACAddress dp ? ;allocate 6 bytes in the stack
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; Look for a buffer to tx
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mov eax, NET1OUT_QUEUE
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call dequeue
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cmp ax, NO_BUFFER
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je .exit ; Exit if no buffer available
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push eax ;save buffer number
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; convert buffer pointer eax to the absolute address
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imul eax, IPBUFFSIZE
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add eax, IPbuffs
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; Extract the destination IP
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; find the destination IP in the ARP table, get MAC
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; store this MAC in 'MACAddress'
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mov ebx, eax ; Save buffer address
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mov edx, [ebx + 16] ; get destination address
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; If the destination address is 255.255.255.255,
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; set the MACAddress to all ones ( broadcast )
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cld
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mov esi, broadcast_add
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lea edi, [MACAddress]
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movsd
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movsw
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cmp edx, 0xffffffff
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je .send ; If it is broadcast, just send
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lea eax, [MACAddress] ;cause this is local variable
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stdcall arp_table_manager, ARP_TABLE_IP_TO_MAC, edx, eax ;opcode,IP,MAC_ptr - Get the MAC address.
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cmp eax, ARP_VALID_MAPPING
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je .send
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; No valid entry. Has the request been sent, but timed out?
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cmp eax, ARP_RESPONSE_TIMEOUT
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je .freebuf
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.wait_response: ;we wait arp-response
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; Re-queue the packet, and exit
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pop ebx
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mov eax, NET1OUT_QUEUE
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call queue ; Get the buffer back
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jmp .exit
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.send: ;if ARP_VALID_MAPPING then send the packet
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lea edi, [MACAddress] ; Pointer to 48 bit destination address
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movzx ecx, word[ebx+2] ; Size of IP packet to send
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xchg ch, cl ; because mirror byte-order
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mov esi, ebx ; Pointer to packet data
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mov bx, ETHER_IP ; Type of packet
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push ebp
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call dword [drvr_transmit] ; Call the drivers transmit function
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pop ebp
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; OK, we have sent a packet, so increment the count
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inc dword [ip_tx_count]
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; And finally, return the buffer to the free queue
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.freebuf:
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pop eax
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call freeBuff
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.exit:
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ret
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endp
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;***************************************************************************
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; Function
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; ether_IP_handler
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;
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; Description
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; Called when an IP ethernet packet is received on the ethernet
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; Header + Data is in Ether_buffer[]
|
|
; We just need to get a buffer from the 'free' queue, and
|
|
; store the packet in it, then insert the packet number into the
|
|
; IPRX queue.
|
|
; If no queue entry is available, the packet is silently discarded
|
|
; All registers may be destroyed
|
|
;
|
|
;***************************************************************************
|
|
ether_IP_handler:
|
|
mov eax, EMPTY_QUEUE
|
|
call dequeue
|
|
cmp ax, NO_BUFFER
|
|
je eiph00x
|
|
|
|
; convert buffer pointer eax to the absolute address
|
|
push eax
|
|
mov ecx, IPBUFFSIZE
|
|
mul ecx
|
|
add eax, IPbuffs
|
|
|
|
mov edi, eax
|
|
|
|
; get a pointer to the start of the DATA
|
|
mov esi, ETH_FRAME.Data
|
|
|
|
; Now store it all away
|
|
mov ecx, IPBUFFSIZE / 4 ; Copy all of the available
|
|
; data across - worse case
|
|
cld
|
|
rep movsd
|
|
|
|
; And finally, place the buffer in the IPRX queue
|
|
pop ebx
|
|
mov eax, IPIN_QUEUE
|
|
call queue
|
|
|
|
eiph00x:
|
|
ret
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; eth_probe
|
|
; Description
|
|
; Searches for an ethernet card. If found, the card is enabled and
|
|
; the ethernet -> IP link established
|
|
;
|
|
; This function scans the PCI bus looking for a supported device.
|
|
; ISA bus is currently not supported.
|
|
;
|
|
; eax is 0 if no hardware found
|
|
;***************************************************************************
|
|
eth_probe:
|
|
; Find a card on the PCI bus, and get it's address
|
|
call scan_bus ; Find the ethernet cards PIC address
|
|
xor eax, eax
|
|
cmp [io_addr], eax
|
|
je ep_00x ; Return 0 in eax if no cards found
|
|
|
|
call dword [drvr_probe] ; Call the drivers probe function
|
|
|
|
mov eax, [io_addr] ; return a non zero value
|
|
|
|
ep_00x:
|
|
ret
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; ethernet_driver
|
|
;
|
|
; Description
|
|
; The ethernet RX and TX handler
|
|
; This is a kernel function, called by stack_handler
|
|
;
|
|
;***************************************************************************
|
|
ethernet_driver:
|
|
; Do nothing if the driver is inactive
|
|
cmp [ethernet_active], byte 0
|
|
je eth_exit
|
|
|
|
call eth_rx
|
|
call eth_tx
|
|
|
|
eth_exit:
|
|
ret
|
|
|
|
;***************************************************************************
|
|
; Function
|
|
; eth_rx
|
|
;
|
|
; Description
|
|
; Polls the ethernet card for received data. Extracts if present
|
|
; Depending on the Protocol within the packet:
|
|
; ARP : Pass to ARP_handler. This may result in an ARP reply
|
|
; being tx'ed
|
|
; IP : Store in an IP buffer
|
|
;
|
|
;***************************************************************************
|
|
eth_rx:
|
|
xor ax, ax
|
|
mov [eth_rx_data_len], ax
|
|
call dword [drvr_poll] ; Call the drivers poll function
|
|
|
|
mov ax, [eth_rx_data_len]
|
|
cmp ax, 0
|
|
je .exit
|
|
|
|
|
|
; Check the protocol. Call appropriate handler
|
|
|
|
mov ax, [ETH_FRAME.Type] ; The address of the protocol word
|
|
|
|
cmp ax, ETHER_IP
|
|
je .is_ip ; It's IP
|
|
|
|
cmp ax, ETHER_ARP
|
|
je .is_arp ; It is ARP
|
|
|
|
jmp .exit ; If not IP or ARP, ignore
|
|
|
|
.is_ip:
|
|
DEBUGF 1,"K : eth_rx - IP packet\n"
|
|
inc dword [ip_rx_count]
|
|
call ether_IP_handler
|
|
jmp .exit
|
|
|
|
.is_arp:
|
|
DEBUGF 1,"K : eth_rx - ARP packet\n"
|
|
; At this point, the packet is still in the Ether_buffer
|
|
call arp_handler
|
|
|
|
.exit:
|
|
ret
|