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

Rev	Author	Line No.	Line
3545	hidnplayr	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
9017	hidnplayr	3	;; Copyright (C) KolibriOS team 2004-2021. All rights reserved. ;;
3545	hidnplayr	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
4850	mario79	17	$Revision: 9017 $
3545	hidnplayr	18
		19	ETH_FRAME_MINIMUM = 60
3982	hidnplayr	20	ETH_QUEUE_SIZE = 255
3545	hidnplayr	21
		22	struct ETH_header
		23
		24	DstMAC dp ? ; destination MAC-address
		25	SrcMAC dp ? ; source MAC-address
		26	Type dw ? ; type of the upper-layer protocol
		27
		28	ends
		29
		30	struct ETH_DEVICE NET_DEVICE
		31
		32	mac dp ?
		33
		34	ends
		35
5522	hidnplayr	36	iglobal
		37	align 4
3982	hidnplayr	38
5522	hidnplayr	39	ETH_BROADCAST dp 0xffffffffffff
3982	hidnplayr	40
5522	hidnplayr	41	ETH_frame_queued dd 0 ; Number of queued frames
3982	hidnplayr	42
5522	hidnplayr	43	ETH_frame_head dd ETH_frame_head ; Pointer to next frame in the linked list
		44	ETH_frame_tail dd ETH_frame_head ; Pointer to last frame in the linked list
3545	hidnplayr	45
		46	endg
		47
3982	hidnplayr	48	uglobal
		49	align 4
		50	ETH_input_event dd ?
		51	endg
		52
6011	hidnplayr	53	macro eth_init {
3982	hidnplayr	54
		55	movi ebx, 1
6011	hidnplayr	56	mov ecx, eth_process_input
3982	hidnplayr	57	call new_sys_threads
		58	test eax, eax
		59	jns @f
		60	DEBUGF DEBUG_NETWORK_ERROR,'K : cannot create kernel thread for ethernet, error %d\n', eax
		61	@@:
		62
		63	}
		64
6011	hidnplayr	65	;-----------------------------------------------------------------;
		66	; ;
		67	; eth_input: This function is called by ethernet drivers. ;
		68	; Push the received ethernet packet onto the ethernet input queue.;
		69	; ;
		70	; IN: [esp] = Pointer to buffer ;
		71	; ;
		72	; OUT: / ;
		73	; ;
		74	;-----------------------------------------------------------------;
3545	hidnplayr	75	align 4
6011	hidnplayr	76	eth_input:
3545	hidnplayr	77
5522	hidnplayr	78	pop eax
3982	hidnplayr	79
9017	hidnplayr	80	if defined NETWORK_SANITY_CHECKS
		81	cmp eax, [net_buffs_low]
		82	jb .assert_mbuff
		83	cmp eax, [net_buffs_high]
		84	ja .assert_mbuff
		85	test eax, 0x7ff
		86	jnz .assert_mbuff
		87	end if
		88
		89	spin_lock_irqsave
		90
5522	hidnplayr	91	cmp [ETH_frame_queued], ETH_QUEUE_SIZE
		92	jae .full
		93	inc [ETH_frame_queued]
3982	hidnplayr	94
5522	hidnplayr	95	; Add frame to the end of the linked list
		96	mov [eax + NET_BUFF.NextPtr], ETH_frame_head
		97
		98	mov ebx, [ETH_frame_tail]
		99	mov [eax + NET_BUFF.PrevPtr], ebx
		100
		101	mov [ETH_frame_tail], eax
		102	mov [ebx + NET_BUFF.NextPtr], eax
		103
9017	hidnplayr	104	spin_unlock_irqrestore
5522	hidnplayr	105
7536	hidnplayr	106	; Mark it as being an Ethernet Frame
		107	mov [eax + NET_BUFF.type], NET_BUFF_ETH
		108
5522	hidnplayr	109	; Now queue an event to process it
3982	hidnplayr	110	xor edx, edx
		111	mov eax, [ETH_input_event]
		112	mov ebx, [eax + EVENT.id]
		113	xor esi, esi
		114	call raise_event
		115
		116	ret
		117
5522	hidnplayr	118	.full:
9017	hidnplayr	119	mov ebx, [eax + NET_BUFF.device]
		120	inc [ebx + NET_DEVICE.packets_rx_ovr]
		121	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH incoming queue is full, discarding packet!\n"
		122	spin_unlock_irqrestore
		123	stdcall net_buff_free, eax
3982	hidnplayr	124	ret
		125
9017	hidnplayr	126	if defined NETWORK_SANITY_CHECKS
		127	.assert_mbuff:
		128	DEBUGF DEBUG_NETWORK_ERROR, "eth_input: invalid buffer 0x%x\n", eax
		129	DEBUGF DEBUG_NETWORK_ERROR, "eth_input: caller=0x%x\n", [esp+4]
		130	xor eax, eax
		131	ret
		132	end if
3982	hidnplayr	133
		134
9017	hidnplayr	135
6011	hidnplayr	136	;-----------------------------------------------------------------;
		137	; ;
		138	; eth_process_input: Process packets from ethernet input queue. ;
		139	; ;
		140	; IN: / ;
		141	; ;
		142	; OUT: / ;
		143	; ;
		144	;-----------------------------------------------------------------;
3982	hidnplayr	145	align 4
6011	hidnplayr	146	eth_process_input:
3982	hidnplayr	147
		148	xor esi, esi
		149	mov ecx, MANUAL_DESTROY
		150	call create_event
		151	mov [ETH_input_event], eax
5522	hidnplayr	152	pushf
3982	hidnplayr	153	.wait:
5522	hidnplayr	154	popf
3982	hidnplayr	155	mov eax, [ETH_input_event]
		156	mov ebx, [eax + EVENT.id]
		157	call wait_event
		158
		159	.loop:
5522	hidnplayr	160	pushf
		161	cli
		162	cmp [ETH_frame_queued], 0
		163	je .wait
3982	hidnplayr	164
5522	hidnplayr	165	dec [ETH_frame_queued]
3982	hidnplayr	166
5522	hidnplayr	167	mov esi, [ETH_frame_head]
		168	mov ebx, [esi + NET_BUFF.NextPtr]
3982	hidnplayr	169
5522	hidnplayr	170	mov [ETH_frame_head], ebx
		171	mov [ebx + NET_BUFF.PrevPtr], ETH_frame_head
		172
		173	popf
		174
		175	mov eax, [esi + NET_BUFF.offset]
		176	add eax, esi
		177	mov ecx, [esi + NET_BUFF.length]
		178	mov ebx, [esi + NET_BUFF.device]
		179
		180	pushd .loop ; return address for protocol handler
		181	push esi ; keep pointer to NET_BUFF on stack
		182
3982	hidnplayr	183	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: size=%u\n", ecx
3643	hidnplayr	184	sub ecx, sizeof.ETH_header
9017	hidnplayr	185	jb .err
3545	hidnplayr	186
5522	hidnplayr	187	; Set registers for protocol handlers
3545	hidnplayr	188	lea edx, [eax + sizeof.ETH_header]
		189	mov ax, [eax + ETH_header.Type]
		190
5522	hidnplayr	191	; Place protocol handlers here
3600	hidnplayr	192	cmp ax, ETHER_PROTO_IPv4
6011	hidnplayr	193	je ipv4_input
3545	hidnplayr	194
3601	hidnplayr	195	cmp ax, ETHER_PROTO_ARP
6011	hidnplayr	196	je arp_input
3545	hidnplayr	197
5001	hidnplayr	198	; cmp ax, ETHER_PROTO_IPv6
6011	hidnplayr	199	; je ipv6_input
3545	hidnplayr	200
5001	hidnplayr	201	; cmp ax, ETHER_PROTO_PPP_DISCOVERY
6011	hidnplayr	202	; je pppoe_discovery_input
3545	hidnplayr	203
5001	hidnplayr	204	; cmp ax, ETHER_PROTO_PPP_SESSION
6011	hidnplayr	205	; je pppoe_session_input
3545	hidnplayr	206
4256	hidnplayr	207	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: Unknown packet type=%x\n", ax
3545	hidnplayr	208
9017	hidnplayr	209	.drop:
		210	mov eax, [esp]
		211	mov eax, [eax + NET_BUFF.device]
		212	inc [eax + NET_DEVICE.packets_rx_drop]
		213	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: dropping\n"
6011	hidnplayr	214	call net_buff_free
3545	hidnplayr	215	ret
		216
9017	hidnplayr	217	.err:
		218	mov eax, [esp]
		219	mov eax, [eax + NET_BUFF.device]
		220	inc [eax + NET_DEVICE.packets_rx_err]
		221	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: invalid frame received\n"
		222	call net_buff_free
		223	ret
6011	hidnplayr	224
		225
9017	hidnplayr	226
		227
6011	hidnplayr	228	;-----------------------------------------------------------------;
		229	; ;
		230	; eth_output ;
		231	; ;
		232	; IN: ax = protocol ;
		233	; ebx = device ptr ;
		234	; ecx = payload size ;
		235	; edx = pointer to destination mac ;
		236	; ;
		237	; OUT: eax = start of net frame / 0 on error ;
		238	; ebx = device ptr ;
		239	; ecx = payload size ;
		240	; edi = start of payload ;
		241	; ;
		242	;-----------------------------------------------------------------;
3545	hidnplayr	243	align 4
6011	hidnplayr	244	eth_output:
3545	hidnplayr	245
3556	hidnplayr	246	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_output: size=%u device=%x\n", ecx, ebx
3545	hidnplayr	247
5015	hidnplayr	248	cmp ecx, [ebx + ETH_DEVICE.mtu]
9017	hidnplayr	249	ja .too_large
3545	hidnplayr	250
		251	push ecx
5015	hidnplayr	252	push ax edx
3545	hidnplayr	253
5522	hidnplayr	254	add ecx, sizeof.ETH_header + NET_BUFF.data
6011	hidnplayr	255	stdcall net_buff_alloc, ecx
3545	hidnplayr	256	test eax, eax
		257	jz .out_of_ram
9017	hidnplayr	258
5522	hidnplayr	259	mov [eax + NET_BUFF.type], NET_BUFF_ETH
		260	mov [eax + NET_BUFF.device], ebx
		261	mov [eax + NET_BUFF.offset], NET_BUFF.data
		262	lea edi, [eax + NET_BUFF.data]
3545	hidnplayr	263
		264	pop esi
		265	movsd
		266	movsw
5015	hidnplayr	267	lea esi, [ebx + ETH_DEVICE.mac]
3545	hidnplayr	268	movsd
		269	movsw
		270	pop ax
		271	stosw
		272
5522	hidnplayr	273	lea eax, [edi - sizeof.ETH_header - NET_BUFF.data] ; Set eax to buffer start
3545	hidnplayr	274	pop ecx
5522	hidnplayr	275
3545	hidnplayr	276	lea edx, [ecx + sizeof.ETH_header] ; Set edx to complete buffer size
		277	cmp edx, ETH_FRAME_MINIMUM
		278	jbe .adjust_size
		279	.done:
5522	hidnplayr	280	mov [eax + NET_BUFF.length], edx
3556	hidnplayr	281	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_output: ptr=%x size=%u\n", eax, edx
3545	hidnplayr	282	ret
		283
		284	.adjust_size:
		285	mov edx, ETH_FRAME_MINIMUM
5015	hidnplayr	286	test edx, edx ; clear zero flag
3545	hidnplayr	287	jmp .done
		288
		289	.out_of_ram:
9017	hidnplayr	290	inc [ebx + NET_DEVICE.packets_tx_drop]
		291	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_output: Out of ram!\n"
		292	add esp, 4+2
		293	pop ecx
5015	hidnplayr	294	xor eax, eax
3545	hidnplayr	295	ret
		296
9017	hidnplayr	297	.too_large:
		298	inc [eax + NET_DEVICE.packets_tx_err]
		299	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_output: Packet too large!\n"
5015	hidnplayr	300	xor eax, eax
3545	hidnplayr	301	ret
		302
		303
		304
6011	hidnplayr	305	;-----------------------------------------------------------------;
		306	; ;
		307	; eth_api: Part of system function 76. ;
		308	; ;
		309	; IN: bl = subfunction number ;
		310	; bh = device number ;
		311	; ecx, edx, .. depends on subfunction ;
		312	; ;
		313	; OUT: depends on subfunction ;
		314	; ;
		315	;-----------------------------------------------------------------;
3545	hidnplayr	316	align 4
6011	hidnplayr	317	eth_api:
3545	hidnplayr	318
3600	hidnplayr	319	cmp bh, NET_DEVICES_MAX
3545	hidnplayr	320	ja .error
		321	movzx eax, bh
7679	hidnplayr	322	mov eax, dword [net_device_list + 4*eax]
3600	hidnplayr	323	cmp [eax + NET_DEVICE.device_type], NET_DEVICE_ETH
3545	hidnplayr	324	jne .error
		325
		326	and ebx, 0xff
		327	cmp ebx, .number
		328	ja .error
		329	jmp dword [.table + 4*ebx]
		330
		331	.table:
3601	hidnplayr	332	dd .read_mac ; 0
3545	hidnplayr	333	.number = ($ - .table) / 4 - 1
		334
		335	.error:
		336	or eax, -1
		337	ret
		338
		339
		340	.read_mac:
		341	movzx ebx, word [eax + ETH_DEVICE.mac]
		342	mov eax, dword [eax + ETH_DEVICE.mac + 2]
5522	hidnplayr	343	mov [esp+20+4], ebx ; FIXME
3545	hidnplayr	344	ret
		345

Subversion Repositories Kolibri OS

(root)/kernel/trunk/network/ethernet.inc – Rev 9017