Subversion Repositories Kolibri OS

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;;                                                                 ;;

;; Copyright (C) KolibriOS team 2004-2010. All rights reserved.    ;;

;; Distributed under terms of the GNU General Public License       ;;

;;                                                                 ;;

;;  ETHERNET.INC                                                   ;;

;;                                                                 ;;

;;  Ethernet network layer for KolibriOS                           ;;

;;                                                                 ;;

;;    Written by hidnplayr@kolibrios.org                           ;;

;;                                                                 ;;

;;          GNU GENERAL PUBLIC LICENSE                             ;;

;;             Version 2, June 1991                                ;;

;;                                                                 ;;

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

$Revision: 2305 $

struct	ETH_header

	DstMAC		dp  ?  ; destination MAC-address

	SrcMAC		dp  ?  ; source MAC-address

	Type		dw  ?  ; type of the upper-layer protocol

ends

ETH_FRAME_MINIMUM	equ 60

struct	ETH_DEVICE	NET_DEVICE

	set_mode	dd ?

	get_mode	dd ?

	set_MAC 	dd ?

	get_MAC 	dd ?

	mode		dd ?

	mac		dp ?

ends

align 4

iglobal

	ETH_BROADCAST	dp  0xffffffffffff

endg

;-----------------------------------------------------------------

;

; ETH_input

;

;  This function is called by ethernet drivers,

;  It pushes the received ethernet packets onto the eth_in_queue

;

;  IN:   [esp]  = Pointer to buffer

;       [esp+4] = size of buffer

;         ebx   = pointer to eth_device

;  OUT: /

;

;-----------------------------------------------------------------

align 4

ETH_input:

	mov	eax, [esp]

	mov	ecx, [esp+4]

	DEBUGF	1,"ETH_input - size: %u\n", ecx

	cmp	ecx, ETH_FRAME_MINIMUM

	jb	.dump

	sub	ecx, sizeof.ETH_header

	lea	edx, [eax + sizeof.ETH_header]

	mov	ax , [eax + ETH_header.Type]

	cmp	ax, ETHER_IPv4

	je	IPv4_input

	cmp	ax, ETHER_ARP

	je	ARP_input

;        cmp     ax, ETHER_PPP_DISCOVERY

;        je      PPPOE_discovery

	DEBUGF	2,"Unknown ethernet packet type %x\n", ax

  .dump:

	DEBUGF	2,"ETH_input - dumping\n"

	call	kernel_free

	add	esp, 4

	ret

;-----------------------------------------------------------------

;

; ETH_output

;

; IN: eax = pointer to source mac

;     ebx = device ptr

;     ecx = packet size

;     edx = pointer to destination mac

;      di = protocol

;

; OUT: edi = 0 on error, pointer to buffer otherwise

;      eax = buffer start

;      ebx = to device structure

;      ecx = unchanged (packet size of embedded data)

;      edx = size of complete buffer

;

;-----------------------------------------------------------------

align 4

ETH_output:

	DEBUGF	1,"ETH_output: size=%u device:%x\n", ecx, ebx

	cmp	ecx, [ebx + NET_DEVICE.mtu]

	ja	.exit

	push	ecx			; << 1

	push	di eax edx		; << 2

	add	ecx, sizeof.ETH_header

	push	ecx			; << 3

	push	ecx			; << 4

	call	kernel_alloc		; >> 4

	test	eax, eax

	jz	.out_of_ram

	mov	edi, eax

	pop	ecx			; >> 3

	pop	esi			; >> 2

	movsd

	movsw

	pop	esi			; >> 2

	movsd

	movsw

	pop	ax			; >> 2

	stosw

	lea	eax, [edi - sizeof.ETH_header]	; Set eax to buffer start

	mov	edx, ecx			; Set edx to complete buffer size

	pop	ecx			; >> 1

	cmp	edx, ETH_FRAME_MINIMUM

	jb	.adjust_size

	DEBUGF	1,"ETH_output: done: %x total size: %u\n", eax, edx

	ret

  .adjust_size:

	mov	edx, ETH_FRAME_MINIMUM

	test	edx, edx	; clear zero flag

	ret

  .out_of_ram:

	DEBUGF	2,"ETH_output: Out of ram space!!\n"

	add	esp, 3*4+2+4

	sub	edi, edi

	ret

  .exit:

	DEBUGF	2,"ETH_output: Packet too large!\n"

	sub	edi, edi

;;;        dec     edi

	ret

;-----------------------------------------------------------------

;

; ETH_API

;

; This function is called by system function 75

;

; IN:  subfunction number in bl

;      device number in bh

;      ecx, edx, .. depends on subfunction

;

; OUT:

;

;-----------------------------------------------------------------

align 4

ETH_API:

	cmp	bh, MAX_NET_DEVICES

	ja	.error

	movzx	eax, bh

	shl	eax, 2

	mov	eax, dword [NET_DRV_LIST + eax]

	cmp	[eax + NET_DEVICE.type], NET_TYPE_ETH

	jne	.error

	test	bl, bl

	jz	.packets_tx	; 0

	dec	bl

	jz	.packets_rx	; 1

	dec	bl

	jz	.bytes_tx	; 2

	dec	bl

	jz	.bytes_rx	; 3

	dec	bl

	jz	.read_mac	; 4

	dec	bl

	jz	.write_mac	; 5

  .error:

	DEBUGF	2,"Device is not ethernet type\n"

	or	eax, -1

	ret

.packets_tx:

	mov	eax, [eax + NET_DEVICE.packets_tx]

	ret

.packets_rx:

	mov	eax, [eax + NET_DEVICE.packets_rx]

	ret

.bytes_tx:

	mov	ebx, dword [eax + NET_DEVICE.bytes_tx + 4]

	mov	eax, dword [eax + NET_DEVICE.bytes_tx]

	mov	[esp+20+4], ebx 			; TODO: fix this ugly code

	ret

.bytes_rx:

	mov	ebx, dword [eax + NET_DEVICE.bytes_rx + 4]

	mov	eax, dword [eax + NET_DEVICE.bytes_rx]

	mov	[esp+20+4], ebx 			; TODO: fix this ugly code

	ret

.read_mac:

	movzx	ebx, word [eax + ETH_DEVICE.mac]

	mov	eax, dword [eax + ETH_DEVICE.mac + 2]

	mov	[esp+20+4], ebx 			; TODO: fix this ugly code

	ret

.write_mac:

	push	ecx

	push	dx

	call	[eax + ETH_DEVICE.set_MAC]

	ret