WebSVN – Kolibri OS – Blame – /kernel/trunk/network/ethernet.inc

Rev	Author	Line No.	Line
3545	hidnplayr	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
		3	;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
		4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;; ETHERNET.INC ;;
		7	;; ;;
		8	;; Ethernet network layer for KolibriOS ;;
		9	;; ;;
		10	;; Written by hidnplayr@kolibrios.org ;;
		11	;; ;;
		12	;; GNU GENERAL PUBLIC LICENSE ;;
		13	;; Version 2, June 1991 ;;
		14	;; ;;
		15	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		16
		17	$Revision: 3346 $
		18
		19	ETH_FRAME_MINIMUM = 60
		20
		21	struct ETH_header
		22
		23	DstMAC dp ? ; destination MAC-address
		24	SrcMAC dp ? ; source MAC-address
		25	Type dw ? ; type of the upper-layer protocol
		26
		27	ends
		28
		29	struct ETH_DEVICE NET_DEVICE
		30
		31	mac dp ?
		32
		33	ends
		34
		35	align 4
		36	iglobal
		37
		38	ETH_BROADCAST dp 0xffffffffffff
		39	endg
		40
		41	;-----------------------------------------------------------------
		42	;
		43	; ETH_input
		44	;
		45	; This function is called by ethernet drivers,
		46	; It pushes the received ethernet packets onto the eth_in_queue
		47	;
		48	; IN: [esp] = Pointer to buffer
		49	; [esp+4] = size of buffer
		50	; ebx = pointer to eth_device
		51	; OUT: /
		52	;
		53	;-----------------------------------------------------------------
		54	align 4
		55	ETH_input:
		56	mov eax, [esp]
		57	mov ecx, [esp+4]
		58
		59	DEBUGF 1,"ETH_input: size=%u\n", ecx
		60	cmp ecx, ETH_FRAME_MINIMUM
		61	jb .dump
		62	sub ecx, sizeof.ETH_header
		63
		64	lea edx, [eax + sizeof.ETH_header]
		65	mov ax, [eax + ETH_header.Type]
		66
		67	cmp ax, ETHER_IPv4
		68	je IPv4_input
		69
		70	cmp ax, ETHER_ARP
		71	je ARP_input
		72
		73	cmp ax, ETHER_IPv6
		74	je IPv6_input
		75
		76	cmp ax, ETHER_PPP_DISCOVERY
		77	je PPPoE_discovery_input
		78
		79	cmp ax, ETHER_PPP_SESSION
		80	je PPPoE_session_input
		81
		82	DEBUGF 2,"ETH_input: Unknown packet type=%x\n", ax
		83
		84	.dump:
		85	DEBUGF 2,"ETH_input: dumping\n"
		86	call kernel_free
		87	add esp, 4
		88	ret
		89
		90	;-----------------------------------------------------------------
		91	;
		92	; ETH_output
		93	;
		94	; IN: eax = pointer to source mac
		95	; ebx = device ptr
		96	; ecx = packet size
		97	; edx = pointer to destination mac
		98	; di = protocol
		99	;
		100	; OUT: edi = 0 on error, pointer to buffer otherwise
		101	; eax = buffer start
		102	; ebx = to device structure
		103	; ecx = unchanged (packet size of embedded data)
		104	; edx = size of complete buffer
		105	;
		106	;-----------------------------------------------------------------
		107	align 4
		108	ETH_output:
		109
		110	DEBUGF 1,"ETH_output: size=%u device=%x\n", ecx, ebx
		111
		112	cmp ecx, [ebx + NET_DEVICE.mtu]
		113	ja .exit
		114
		115	push ecx
		116	push di eax edx
		117
		118	add ecx, sizeof.ETH_header
		119	stdcall kernel_alloc, ecx
		120	test eax, eax
		121	jz .out_of_ram
		122	mov edi, eax
		123
		124	pop esi
		125	movsd
		126	movsw
		127	pop esi
		128	movsd
		129	movsw
		130	pop ax
		131	stosw
		132
		133	lea eax, [edi - sizeof.ETH_header] ; Set eax to buffer start
		134	pop ecx
		135	lea edx, [ecx + sizeof.ETH_header] ; Set edx to complete buffer size
		136
		137	cmp edx, ETH_FRAME_MINIMUM
		138	jbe .adjust_size
		139	.done:
		140	DEBUGF 1,"ETH_output: ptr=%x size=%u\n", eax, edx
		141	ret
		142
		143	.adjust_size:
		144	mov edx, ETH_FRAME_MINIMUM
		145	test edx, edx ; clear zero flag
		146	jmp .done
		147
		148	.out_of_ram:
		149	DEBUGF 2,"ETH_output: Out of ram!\n"
		150	add esp, 4+4+2+4
		151	sub edi, edi
		152	ret
		153
		154	.exit:
		155	DEBUGF 2,"ETH_output: Packet too large!\n"
		156	sub edi, edi
		157	ret
		158
		159
		160
		161	;-----------------------------------------------------------------
		162	;
		163	; ETH_API
		164	;
		165	; This function is called by system function 75
		166	;
		167	; IN: subfunction number in bl
		168	; device number in bh
		169	; ecx, edx, .. depends on subfunction
		170	;
		171	; OUT:
		172	;
		173	;-----------------------------------------------------------------
		174	align 4
		175	ETH_api:
		176
		177	cmp bh, MAX_NET_DEVICES
		178	ja .error
		179	movzx eax, bh
		180	mov eax, dword [NET_DRV_LIST + 4*eax]
		181	cmp [eax + NET_DEVICE.type], NET_TYPE_ETH
		182	jne .error
		183
		184	and ebx, 0xff
		185	cmp ebx, .number
		186	ja .error
		187	jmp dword [.table + 4*ebx]
		188
		189	.table:
		190	dd .packets_tx ; 0
		191	dd .packets_rx ; 1
		192	dd .bytes_tx ; 2
		193	dd .bytes_rx ; 3
		194	dd .read_mac ; 4
		195	dd .state ; 5
		196	.number = ($ - .table) / 4 - 1
		197
		198	.error:
		199	or eax, -1
		200	ret
		201
		202	.packets_tx:
		203	mov eax, [eax + NET_DEVICE.packets_tx]
		204
		205	ret
		206
		207	.packets_rx:
		208	mov eax, [eax + NET_DEVICE.packets_rx]
		209	ret
		210
		211	.bytes_tx:
		212	mov ebx, dword [eax + NET_DEVICE.bytes_tx + 4]
		213	mov eax, dword [eax + NET_DEVICE.bytes_tx]
		214	mov [esp+20+4], ebx ; TODO: fix this ugly code
		215	ret
		216
		217	.bytes_rx:
		218	mov ebx, dword [eax + NET_DEVICE.bytes_rx + 4]
		219	mov eax, dword [eax + NET_DEVICE.bytes_rx]
		220	mov [esp+20+4], ebx ; TODO: fix this ugly code
		221	ret
		222
		223
		224	.read_mac:
		225	movzx ebx, word [eax + ETH_DEVICE.mac]
		226	mov eax, dword [eax + ETH_DEVICE.mac + 2]
		227	mov [esp+20+4], ebx ; TODO: fix this ugly code
		228	ret
		229
		230	.state:
		231	mov eax, [eax + NET_DEVICE.state]
		232	ret
		233

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(root)/kernel/trunk/network/ethernet.inc – Rev 3545