;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;; ;; Distributed under terms of the GNU General Public License ;; ;; ;; ;; ETHERNET.INC ;; ;; ;; ;; Ethernet network layer for Menuet OS ;; ;; ;; ;; This file contains the following: ;; ;; PCI bus scanning for valid devices ;; ;; Table of supported ethernet drivers ;; ;; Code to identify and activate a supported driver ;; ;; ARP handler ;; ;; Driver interface to the IP layer ;; ;; Gateway support ;; ;; ;; ;; Individual driver files are included here ;; ;; ;; ;; The PCI bus scanning code was ported from the etherboot ;; ;; 5.0.6 project. The copyright statement for that code is ;; ;; ;; ;; GNU GENERAL PUBLIC LICENSE ;; ;; Version 2, June 1991 ;; ;; ;; ;; remaining parts Copyright 2002 Mike Hibbett ;; ;; mikeh@oceanfree.net ;; ;; ;; ;; See file COPYING for details ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; $Revision$ ;******************************************************************** ; Interface ; ethernet_driver called by stack_handler in stack.inc ; eth_probe called by app_stack_handler in stack.inc ; ;******************************************************************** ETHER_IP equ 0x0008 ; Reversed from 0800 for intel ETHER_ARP equ 0x0608 ; Reversed from 0806 for intel ETHER_RARP equ 0x3580 struc ETH_FRAME { .DstMAC dp ? ;destination MAC-address [6 bytes] .SrcMAC dp ? ;source MAC-address [6 bytes] .Type dw ? ;type of the upper-layer protocol [2 bytes] .Data db ? ;data [46-1500 bytes] } virtual at Ether_buffer ETH_FRAME ETH_FRAME end virtual ; Some useful information on data structures ; Ethernet Packet - ARP Request example ; ; 0 1 2 3 ; 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 ; ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | Dest H/W Address | ; | ( 14 byte header ) | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | | Source H/W Address | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | Protocol - ARP 08 06 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | H/W Type 00 01 | Protocol Type 08 00 | ; | ( ARP Request packet ) | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | HLen 0x06 | PLen 0x04 | OpCode 00 01 | ; | ( 0001 for request, 0002 for reply ) | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | Source Hardware Address ( MAC Address ) | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | | Source IP Address | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | | Destination Hardware Address | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | Destination IP Address | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; Include individual drivers source files at this point. ; If you create a new driver, include it below. include "drivers/rtl8029.inc" include "drivers/i8255x.inc" include "drivers/rtl8139.inc" include "drivers/3c59x.inc" include "drivers/sis900.inc" include "drivers/pcnet32.inc" include "drivers/rtl8169.inc" include "drivers/forcedeth.inc" include "drivers/r6040.inc" ; PCICards ; ======== ; PCI vendor and hardware types for hardware supported by the above drivers ; If you add a driver, ensure you update this datastructure, otherwise the ; card will not be probed. ; Each driver is defined by 4 double words. These are ; PCIVendorDevice probeFunction ResetFunction PollFunction transmitFunction ; The last entry must be kept at all zeros, to indicate the end of the list ; As a PCI driver may support more than one hardware implementation, there may ; be several lines which refer to the same functions. ; The first driver found on the PCI bus will be the one used. PCICARDS_ENTRY_SIZE equ 24 ; Size of each PCICARDS entry iglobal PCICards: dd 0x12098086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0 dd 0x10298086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0 dd 0x12298086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0 dd 0x10308086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0 dd 0x24498086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0 dd 0x10688086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0 dd 0x802910ec, rtl8029_probe, rtl8029_reset, rtl8029_poll, rtl8029_transmit, 0 dd 0x813910ec, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x813810ec, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x12111113, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x13601500, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x13604033, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x13001186, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x13401186, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0xab0613d1, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0xa1171259, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0xa11e1259, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0xab0614ea, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0xab0714ea, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x123411db, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x91301432, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x101202ac, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x0106018a, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x1211126c, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x81391743, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x8139021b, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable dd 0x816810ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0 dd 0x816910ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0 dd 0x011616ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0 dd 0x43001186, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0 dd 0x816710ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0 dd 0x590010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x592010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x597010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x595010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x595110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x595210b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x900010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x900110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x900410b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x900510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x900610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x900A10b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x905010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x905110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x905510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x905810b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x905A10b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x920010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x980010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x980510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x764610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x505510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x605510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x605610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x5b5710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x505710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x515710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x525710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x656010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x656210b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x656410b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x450010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0 dd 0x09001039, SIS900_probe, SIS900_reset, SIS900_poll, SIS900_transmit, 0 dd 0x70161039, SIS900_probe, SIS900_reset, SIS900_poll, SIS900_transmit, 0 dd 0x20001022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0 dd 0x26251022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0 dd 0x20011022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0 dd 0x006610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; nVidia Corporation nForce2 Ethernet Controller dd 0x01c310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x00D610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x008610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x008c10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x00e610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x00df10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x005610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x005710de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x003710de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x003810de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x026810de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x026910de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x037210de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x037310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x03e510de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x03e610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x03ee10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x03ef10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x045010de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x045110de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x045210de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x045310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x054c10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x054d10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x054e10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x054f10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x07dc10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x07dd10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x07de10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x07df10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x076010de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; MCP77 Ethernet Controller dd 0x076110de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x076210de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x076310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x0ab010de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x0ab110de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x0ab210de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x0ab310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x0d7d10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested dd 0x604017F3, r6040_probe, r6040_reset, r6040_poll, r6040_transmit, 0 rb PCICARDS_ENTRY_SIZE ; end of list marker, do not remove endg uglobal ;Net-stack's interface's settings node_addr: db 0,0,0,0,0,0 gateway_ip: dd 0 dns_ip: dd 0 eth_rx_data_len: dw 0 eth_status: dd 0 io_addr: dd 0 hdrtype: db 0 vendor_device: dd 0 pci_data: dd 0 pci_dev: dd 0 pci_bus: dd 0 ; These will hold pointers to the selected driver functions drvr_probe: dd 0 drvr_reset: dd 0 drvr_poll: dd 0 drvr_transmit: dd 0 drvr_cable: dd 0 endg iglobal broadcast_add: db 0xff,0xff,0xff,0xff,0xff,0xff subnet_mask: dd 0x00ffffff ; 255.255.255.0 endg include "arp.inc" ;arp-protocol functions include "pci.inc" ;PCI bus access functions ;*************************************************************************** ; Function ; eth_tx ; ; Description ; Looks at the NET1OUT_QUEUE for data to send. ; Stores that destination IP in a location used by the tx routine ; Looks up the MAC address in the ARP table; stores that where ; the tx routine can get it ; Get the length of the data. Store that where the tx routine wants it ; Call tx ; Places buffer on empty queue when the tx routine finished ; ;*************************************************************************** proc eth_tx stdcall uses ebx esi edi local MACAddress dp ? ;allocate 6 bytes in the stack ; Look for a buffer to tx mov eax, NET1OUT_QUEUE call dequeue cmp ax, NO_BUFFER je .exit ; Exit if no buffer available push eax;save buffer number ; convert buffer pointer eax to the absolute address imul eax, IPBUFFSIZE add eax, IPbuffs ; Extract the destination IP ; find the destination IP in the ARP table, get MAC ; store this MAC in 'MACAddress' mov ebx, eax ; Save buffer address mov edx, [ebx + 16] ; get destination address ; If the destination address is 255.255.255.255, ; set the MACAddress to all ones ( broadcast ) cld mov esi, broadcast_add lea edi, [MACAddress] movsd movsw cmp edx, 0xffffffff je .send ; If it is broadcast, just send lea eax, [MACAddress];cause this is local variable stdcall arp_table_manager, ARP_TABLE_IP_TO_MAC, edx, eax;opcode,IP,MAC_ptr - Get the MAC address. cmp eax, ARP_VALID_MAPPING je .send ; No valid entry. Has the request been sent, but timed out? cmp eax, ARP_RESPONSE_TIMEOUT je .freebuf .wait_response: ;we wait arp-response ; Re-queue the packet, and exit pop ebx mov eax, NET1OUT_QUEUE call queue ; Get the buffer back jmp .exit .send: ;if ARP_VALID_MAPPING then send the packet lea edi, [MACAddress] ; Pointer to 48 bit destination address movzx ecx, word[ebx+2] ; Size of IP packet to send xchg ch, cl ; because mirror byte-order mov esi, ebx ; Pointer to packet data mov bx, ETHER_IP ; Type of packet push ebp call dword [drvr_transmit]; Call the drivers transmit function pop ebp ; OK, we have sent a packet, so increment the count inc dword [ip_tx_count] ; And finally, return the buffer to the free queue .freebuf: pop eax call freeBuff .exit: ret endp ;*************************************************************************** ; Function ; ether_IP_handler ; ; Description ; Called when an IP ethernet packet is received on the ethernet ; 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 ; ;*************************************************************************** ;uglobal ; ether_IP_handler_cnt dd ? ;endg 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 ; inc [ether_IP_handler_cnt] ; DEBUGF 1, "K : ether_IP_handler (%u)\n", [ether_IP_handler_cnt] ; 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 DEBUGF 1,"K : eth_rx - dumped (%u)\n", ax inc [dumped_rx_count] 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