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

Rev	Author	Line No.	Line
3545	hidnplayr	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
7678	hidnplayr	3	;; Copyright (C) KolibriOS team 2004-2019. All rights reserved. ;;
3545	hidnplayr	4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;; loopback.inc ;;
		7	;; ;;
		8	;; LoopBack device 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: 8103 $
3545	hidnplayr	18
		19	iglobal
3698	hidnplayr	20	align 4
3545	hidnplayr	21
		22	LOOPBACK_DEVICE:
3600	hidnplayr	23
3601	hidnplayr	24	.device_type dd NET_DEVICE_LOOPBACK
		25	.mtu dd 4096
		26	.name dd .namestr
3545	hidnplayr	27
8103	dunkaist	28	.unload dd loop_dummy
		29	.reset dd loop_dummy
6011	hidnplayr	30	.transmit dd loop_input
3545	hidnplayr	31
3601	hidnplayr	32	.bytes_tx dq 0
		33	.bytes_rx dq 0
		34	.packets_tx dd 0
		35	.packets_rx dd 0
3545	hidnplayr	36
3601	hidnplayr	37	.link_state dd -1
4388	hidnplayr	38	.hwacc dd NET_HWACC_TCP_IPv4_IN + NET_HWACC_TCP_IPv4_OUT
3545	hidnplayr	39
3601	hidnplayr	40	.namestr db 'loopback', 0
		41
3545	hidnplayr	42	endg
		43
3601	hidnplayr	44
6011	hidnplayr	45	macro loop_init {
3601	hidnplayr	46	local .fail
		47
		48	mov ebx, LOOPBACK_DEVICE
6011	hidnplayr	49	call net_add_device
3601	hidnplayr	50
		51	cmp eax, -1
		52	je .fail
		53
7678	hidnplayr	54	mov [IPv4_address], 127 + 1 shl 24
		55	mov [IPv4_subnet], 255
		56	mov [IPv4_broadcast], 0xffffff00 + 127
3601	hidnplayr	57
		58	.fail:
		59	}
		60
5976	hidnplayr	61	;-----------------------------------------------------------------;
		62	; ;
8103	dunkaist	63	; loop_dummy ;
		64	; ;
		65	; IN: / ;
		66	; ;
		67	; OUT: / ;
		68	; ;
		69	;-----------------------------------------------------------------;
		70	align 4
		71	loop_dummy:
		72	ret
		73
		74	;-----------------------------------------------------------------;
		75	; ;
6011	hidnplayr	76	; loop_input ;
5976	hidnplayr	77	; ;
		78	; IN: [esp+4] = Pointer to buffer ;
		79	; ;
7678	hidnplayr	80	; OUT: eax = 0 on success, errorcode otherwise ;
5976	hidnplayr	81	; ;
		82	;-----------------------------------------------------------------;
3545	hidnplayr	83	align 4
6011	hidnplayr	84	loop_input:
3545	hidnplayr	85
5522	hidnplayr	86	mov eax, [esp+4]
3545	hidnplayr	87
5522	hidnplayr	88	; Update stats
7678	hidnplayr	89	inc [LOOPBACK_DEVICE.packets_tx]
3610	hidnplayr	90	inc [LOOPBACK_DEVICE.packets_rx]
5522	hidnplayr	91
		92	mov ecx, [eax + NET_BUFF.length]
3610	hidnplayr	93	add dword[LOOPBACK_DEVICE.bytes_rx], ecx
		94	adc dword[LOOPBACK_DEVICE.bytes_rx + 4], 0
7678	hidnplayr	95	add dword[LOOPBACK_DEVICE.bytes_tx], ecx
		96	adc dword[LOOPBACK_DEVICE.bytes_tx + 4], 0
3610	hidnplayr	97
5522	hidnplayr	98	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: ptr=%x size=%u\n", eax, ecx
3545	hidnplayr	99
5522	hidnplayr	100	; Reverse buffptr and returnaddr on stack
		101	pop edx edi
7678	hidnplayr	102	push edx .done edi
5522	hidnplayr	103
		104	; Set registers for protocol handlers
		105	lea edx, [eax + NET_BUFF.data]
		106	mov ebx, [eax + NET_BUFF.device]
		107	mov eax, [eax + NET_BUFF.type]
		108
		109	; Place protocol handlers here
3600	hidnplayr	110	cmp eax, AF_INET4
6011	hidnplayr	111	je ipv4_input
3545	hidnplayr	112
5522	hidnplayr	113	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: Unknown packet type=%x\n", eax
3545	hidnplayr	114
		115	.dump:
3556	hidnplayr	116	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: dumping\n"
6011	hidnplayr	117	call net_buff_free
7678	hidnplayr	118
		119	or eax, -1
3545	hidnplayr	120	ret
		121
7678	hidnplayr	122	.done:
		123	xor eax, eax
		124	ret
5522	hidnplayr	125
7678	hidnplayr	126
5976	hidnplayr	127	;-----------------------------------------------------------------;
		128	; ;
6011	hidnplayr	129	; loop_output ;
5976	hidnplayr	130	; ;
		131	; IN: ecx = packet size ;
		132	; edi = address family ;
		133	; ;
		134	; OUT: eax = start of net frame / 0 on error ;
		135	; ebx = to device structure ;
		136	; ecx = unchanged (packet size of embedded data) ;
		137	; edi = start of payload ;
		138	; ;
		139	;-----------------------------------------------------------------;
3545	hidnplayr	140	align 4
6011	hidnplayr	141	loop_output:
3545	hidnplayr	142
3556	hidnplayr	143	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output\n"
3545	hidnplayr	144
5522	hidnplayr	145	cmp ecx, [LOOPBACK_DEVICE.mtu]
		146	ja .too_large
3545	hidnplayr	147
5522	hidnplayr	148	push ecx edi
5523	hidnplayr	149	add ecx, NET_BUFF.data
6011	hidnplayr	150	stdcall net_buff_alloc, ecx
3545	hidnplayr	151	test eax, eax
		152	jz .out_of_ram
		153
5522	hidnplayr	154	pop edi
		155	mov [eax + NET_BUFF.type], edi
		156	mov ebx, LOOPBACK_DEVICE
		157	mov [eax + NET_BUFF.device], ebx
3545	hidnplayr	158	pop ecx
5522	hidnplayr	159	mov [eax + NET_BUFF.length], ecx
		160	lea edi, [eax + NET_BUFF.data]
3545	hidnplayr	161
5522	hidnplayr	162	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output: ptr=%x size=%u\n", eax, ecx
3545	hidnplayr	163	ret
		164
5522	hidnplayr	165	.too_large:
		166	DEBUGF DEBUG_NETWORK_ERROR, "LOOP_output: packet is too large\n"
		167	xor eax, eax
		168	ret
		169
3545	hidnplayr	170	.out_of_ram:
3610	hidnplayr	171	DEBUGF DEBUG_NETWORK_ERROR, "LOOP_output: out of memory\n"
3600	hidnplayr	172	add esp, 4+4
5522	hidnplayr	173	xor eax, eax
3545	hidnplayr	174	ret
		175

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(root)/kernel/trunk/network/loopback.inc – Rev 8103