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

Rev	Author	Line No.	Line
3545	hidnplayr	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
9054	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	;; 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: 9054 $
3545	hidnplayr	18
		19	iglobal
3698	hidnplayr	20	align 4
3545	hidnplayr	21
		22	LOOPBACK_DEVICE:
3600	hidnplayr	23
9054	hidnplayr	24	.device_type dd NET_DEVICE_LOOPBACK
		25	.mtu dd NET_BUFFER_SIZE - NET_BUFF.data
		26	.name dd .namestr
3545	hidnplayr	27
9054	hidnplayr	28	.unload dd loop_dummy
		29	.reset dd loop_dummy
		30	.transmit dd loop_input
3545	hidnplayr	31
9054	hidnplayr	32	.link_state dd -1
		33	.hwacc dd NET_HWACC_TCP_IPv4_IN + NET_HWACC_TCP_IPv4_OUT
3545	hidnplayr	34
9054	hidnplayr	35	.bytes_tx dq ?
		36	.bytes_rx dq ?
3545	hidnplayr	37
9054	hidnplayr	38	.packets_tx dd ?
		39	.packets_tx_err dd ?
		40	.packets_tx_drop dd ?
		41	.packets_tx_ovr dd ?
3601	hidnplayr	42
9054	hidnplayr	43	.packets_rx dd ?
		44	.packets_rx_err dd ?
		45	.packets_rx_drop dd ?
		46	.packets_rx_ovr dd ?
		47
		48	.namestr db 'loopback', 0
		49
3545	hidnplayr	50	endg
		51
3601	hidnplayr	52
6011	hidnplayr	53	macro loop_init {
3601	hidnplayr	54	local .fail
		55
		56	mov ebx, LOOPBACK_DEVICE
6011	hidnplayr	57	call net_add_device
3601	hidnplayr	58
		59	cmp eax, -1
		60	je .fail
		61
7678	hidnplayr	62	mov [IPv4_address], 127 + 1 shl 24
		63	mov [IPv4_subnet], 255
		64	mov [IPv4_broadcast], 0xffffff00 + 127
3601	hidnplayr	65
		66	.fail:
		67	}
		68
5976	hidnplayr	69	;-----------------------------------------------------------------;
		70	; ;
8103	dunkaist	71	; loop_dummy ;
		72	; ;
		73	; IN: / ;
		74	; ;
		75	; OUT: / ;
		76	; ;
		77	;-----------------------------------------------------------------;
		78	align 4
		79	loop_dummy:
		80	ret
		81
		82	;-----------------------------------------------------------------;
		83	; ;
6011	hidnplayr	84	; loop_input ;
5976	hidnplayr	85	; ;
		86	; IN: [esp+4] = Pointer to buffer ;
		87	; ;
7678	hidnplayr	88	; OUT: eax = 0 on success, errorcode otherwise ;
5976	hidnplayr	89	; ;
		90	;-----------------------------------------------------------------;
3545	hidnplayr	91	align 4
6011	hidnplayr	92	loop_input:
3545	hidnplayr	93
5522	hidnplayr	94	mov eax, [esp+4]
3545	hidnplayr	95
5522	hidnplayr	96	; Update stats
7678	hidnplayr	97	inc [LOOPBACK_DEVICE.packets_tx]
3610	hidnplayr	98	inc [LOOPBACK_DEVICE.packets_rx]
5522	hidnplayr	99
		100	mov ecx, [eax + NET_BUFF.length]
3610	hidnplayr	101	add dword[LOOPBACK_DEVICE.bytes_rx], ecx
		102	adc dword[LOOPBACK_DEVICE.bytes_rx + 4], 0
7678	hidnplayr	103	add dword[LOOPBACK_DEVICE.bytes_tx], ecx
		104	adc dword[LOOPBACK_DEVICE.bytes_tx + 4], 0
3610	hidnplayr	105
5522	hidnplayr	106	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: ptr=%x size=%u\n", eax, ecx
3545	hidnplayr	107
5522	hidnplayr	108	; Reverse buffptr and returnaddr on stack
		109	pop edx edi
7678	hidnplayr	110	push edx .done edi
5522	hidnplayr	111
		112	; Set registers for protocol handlers
		113	lea edx, [eax + NET_BUFF.data]
		114	mov ebx, [eax + NET_BUFF.device]
		115	mov eax, [eax + NET_BUFF.type]
		116
		117	; Place protocol handlers here
3600	hidnplayr	118	cmp eax, AF_INET4
6011	hidnplayr	119	je ipv4_input
3545	hidnplayr	120
5522	hidnplayr	121	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: Unknown packet type=%x\n", eax
3545	hidnplayr	122
		123	.dump:
3556	hidnplayr	124	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: dumping\n"
6011	hidnplayr	125	call net_buff_free
7678	hidnplayr	126
		127	or eax, -1
3545	hidnplayr	128	ret
		129
7678	hidnplayr	130	.done:
		131	xor eax, eax
		132	ret
5522	hidnplayr	133
7678	hidnplayr	134
5976	hidnplayr	135	;-----------------------------------------------------------------;
		136	; ;
6011	hidnplayr	137	; loop_output ;
5976	hidnplayr	138	; ;
		139	; IN: ecx = packet size ;
		140	; edi = address family ;
		141	; ;
		142	; OUT: eax = start of net frame / 0 on error ;
		143	; ebx = to device structure ;
		144	; ecx = unchanged (packet size of embedded data) ;
		145	; edi = start of payload ;
		146	; ;
		147	;-----------------------------------------------------------------;
3545	hidnplayr	148	align 4
6011	hidnplayr	149	loop_output:
3545	hidnplayr	150
3556	hidnplayr	151	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output\n"
3545	hidnplayr	152
5522	hidnplayr	153	cmp ecx, [LOOPBACK_DEVICE.mtu]
		154	ja .too_large
3545	hidnplayr	155
5522	hidnplayr	156	push ecx edi
5523	hidnplayr	157	add ecx, NET_BUFF.data
6011	hidnplayr	158	stdcall net_buff_alloc, ecx
3545	hidnplayr	159	test eax, eax
		160	jz .out_of_ram
		161
5522	hidnplayr	162	pop edi
		163	mov [eax + NET_BUFF.type], edi
		164	mov ebx, LOOPBACK_DEVICE
		165	mov [eax + NET_BUFF.device], ebx
3545	hidnplayr	166	pop ecx
5522	hidnplayr	167	mov [eax + NET_BUFF.length], ecx
		168	lea edi, [eax + NET_BUFF.data]
3545	hidnplayr	169
5522	hidnplayr	170	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output: ptr=%x size=%u\n", eax, ecx
3545	hidnplayr	171	ret
		172
5522	hidnplayr	173	.too_large:
		174	DEBUGF DEBUG_NETWORK_ERROR, "LOOP_output: packet is too large\n"
		175	xor eax, eax
		176	ret
		177
3545	hidnplayr	178	.out_of_ram:
3610	hidnplayr	179	DEBUGF DEBUG_NETWORK_ERROR, "LOOP_output: out of memory\n"
3600	hidnplayr	180	add esp, 4+4
5522	hidnplayr	181	xor eax, eax
3545	hidnplayr	182	ret
		183

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(root)/kernel/trunk/network/loopback.inc – Rev 9054