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

Rev	Author	Line No.	Line
3545	hidnplayr	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
5363	yogev_ezra	3	;; Copyright (C) KolibriOS team 2004-2015. 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: 6011 $
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
		79	pushf
		80	cli
3982	hidnplayr	81
5522	hidnplayr	82	cmp [ETH_frame_queued], ETH_QUEUE_SIZE
		83	jae .full
		84	inc [ETH_frame_queued]
3982	hidnplayr	85
5522	hidnplayr	86	; Add frame to the end of the linked list
		87	mov [eax + NET_BUFF.NextPtr], ETH_frame_head
		88
		89	mov ebx, [ETH_frame_tail]
		90	mov [eax + NET_BUFF.PrevPtr], ebx
		91
		92	mov [ETH_frame_tail], eax
		93	mov [ebx + NET_BUFF.NextPtr], eax
		94
		95	popf
		96
		97	; Now queue an event to process it
3982	hidnplayr	98	xor edx, edx
		99	mov eax, [ETH_input_event]
		100	mov ebx, [eax + EVENT.id]
		101	xor esi, esi
		102	call raise_event
		103
		104	ret
		105
5522	hidnplayr	106	.full:
4511	hidnplayr	107	DEBUGF DEBUG_NETWORK_ERROR, "ETH incoming queue is full, discarding packet!\n"
5522	hidnplayr	108	popf
		109	push eax
6011	hidnplayr	110	call net_buff_free
3982	hidnplayr	111	ret
		112
		113
		114
6011	hidnplayr	115	;-----------------------------------------------------------------;
		116	; ;
		117	; eth_process_input: Process packets from ethernet input queue. ;
		118	; ;
		119	; IN: / ;
		120	; ;
		121	; OUT: / ;
		122	; ;
		123	;-----------------------------------------------------------------;
3982	hidnplayr	124	align 4
6011	hidnplayr	125	eth_process_input:
3982	hidnplayr	126
		127	xor esi, esi
		128	mov ecx, MANUAL_DESTROY
		129	call create_event
		130	mov [ETH_input_event], eax
5522	hidnplayr	131	pushf
3982	hidnplayr	132	.wait:
5522	hidnplayr	133	popf
3982	hidnplayr	134	mov eax, [ETH_input_event]
		135	mov ebx, [eax + EVENT.id]
		136	call wait_event
		137
		138	.loop:
5522	hidnplayr	139	pushf
		140	cli
		141	cmp [ETH_frame_queued], 0
		142	je .wait
3982	hidnplayr	143
5522	hidnplayr	144	dec [ETH_frame_queued]
3982	hidnplayr	145
5522	hidnplayr	146	mov esi, [ETH_frame_head]
		147	mov ebx, [esi + NET_BUFF.NextPtr]
3982	hidnplayr	148
5522	hidnplayr	149	mov [ETH_frame_head], ebx
		150	mov [ebx + NET_BUFF.PrevPtr], ETH_frame_head
		151
		152	popf
		153
		154	mov eax, [esi + NET_BUFF.offset]
		155	add eax, esi
		156	mov ecx, [esi + NET_BUFF.length]
		157	mov ebx, [esi + NET_BUFF.device]
		158
		159	pushd .loop ; return address for protocol handler
		160	push esi ; keep pointer to NET_BUFF on stack
		161
3982	hidnplayr	162	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: size=%u\n", ecx
3643	hidnplayr	163	sub ecx, sizeof.ETH_header
3545	hidnplayr	164	jb .dump
		165
5522	hidnplayr	166	; Set registers for protocol handlers
3545	hidnplayr	167	lea edx, [eax + sizeof.ETH_header]
		168	mov ax, [eax + ETH_header.Type]
		169
5522	hidnplayr	170	; Place protocol handlers here
3600	hidnplayr	171	cmp ax, ETHER_PROTO_IPv4
6011	hidnplayr	172	je ipv4_input
3545	hidnplayr	173
3601	hidnplayr	174	cmp ax, ETHER_PROTO_ARP
6011	hidnplayr	175	je arp_input
3545	hidnplayr	176
5001	hidnplayr	177	; cmp ax, ETHER_PROTO_IPv6
6011	hidnplayr	178	; je ipv6_input
3545	hidnplayr	179
5001	hidnplayr	180	; cmp ax, ETHER_PROTO_PPP_DISCOVERY
6011	hidnplayr	181	; je pppoe_discovery_input
3545	hidnplayr	182
5001	hidnplayr	183	; cmp ax, ETHER_PROTO_PPP_SESSION
6011	hidnplayr	184	; je pppoe_session_input
3545	hidnplayr	185
4256	hidnplayr	186	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: Unknown packet type=%x\n", ax
3545	hidnplayr	187
		188	.dump:
4256	hidnplayr	189	DEBUGF DEBUG_NETWORK_VERBOSE, "ETH_input: dumping\n"
6011	hidnplayr	190	call net_buff_free
3545	hidnplayr	191	ret
		192
6011	hidnplayr	193
		194
		195	;-----------------------------------------------------------------;
		196	; ;
		197	; eth_output ;
		198	; ;
		199	; IN: ax = protocol ;
		200	; ebx = device ptr ;
		201	; ecx = payload size ;

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(root)/kernel/trunk/network/ethernet.inc – Rev 7522