WebSVN – Kolibri OS – Diff – /kernel/branches/Kolibri-acpi/network/loopback.inc


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                                                                 ;;
;; Copyright (C) KolibriOS team 2004-2010. All rights reserved.    ;;
;; Distributed under terms of the GNU General Public License       ;;
;;                                                                 ;;
;;  loopback.inc                                                   ;;
;;                                                                 ;;
;;  LoopBack device for KolibriOS                                  ;;
;;                                                                 ;;
;;    Written by hidnplayr@kolibrios.org                           ;;
;;                                                                 ;;
;;          GNU GENERAL PUBLIC LICENSE                             ;;
;;             Version 2, June 1991                                ;;
;;                                                                 ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
$Revision: 2891 $
 
iglobal
 
LOOPBACK_DEVICE:
        .type            dd NET_TYPE_LOOPBACK
        .mtu             dd 4096
        .name            dd .namestr
 
        .unload          dd .dummy_fn
        .reset           dd .dummy_fn
        .transmit        dd LOOP_input
 
        .bytes_tx        dq 0
        .bytes_rx        dq 0
        .packets_tx      dd 0
        .packets_rx      dd 0
 
        .namestr         db 'loopback', 0
 
        .dummy_fn:
                ret
 
endg
 
;-----------------------------------------------------------------
;
; LOOP_input
;
;  IN:   [esp+4]  = Pointer to buffer
;       [esp+8] = size of buffer
;
;  OUT: /
;
;-----------------------------------------------------------------
align 4
LOOP_input:
        pop     ebx
        pop     eax
        pop     ecx
 
        push    ebx
        push    ecx
        push    eax
 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "LOOP_input: size=%u\n", ecx
        lea     edx, [eax + 2]
        mov     ax, word[eax]
        mov     ebx, LOOPBACK_DEVICE
 
        cmp     ax, ETHER_IPv4
        je      IPv4_input
 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "LOOP_input: Unknown packet type=%x\n", ax
 
  .dump:
        DEBUGF  DEBUG_NETWORK_VERBOSE, "LOOP_input: dumping\n"
        call    kernel_free
        add     esp, 4
        ret
 
;-----------------------------------------------------------------
;
; LOOP_output
;
; IN:
;     ecx = packet size
;      di = protocol
;
; OUT: edi = 0 on error, pointer to buffer otherwise
;      eax = buffer start
;      ebx = to device structure
;      ecx = unchanged (packet size of embedded data)
;      edx = size of complete buffer
;
;-----------------------------------------------------------------
align 4
LOOP_output:
 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "LOOP_output\n"
 
        push    ecx
        push    di
 
        add     ecx, 2
        cmp     ecx, [LOOPBACK_DEVICE.mtu]
        ja      .out_of_ram
        stdcall kernel_alloc, ecx
        test    eax, eax
        jz      .out_of_ram
        mov     edi, eax
        pop     ax
        stosw
 
        lea     eax, [edi - 2]  ; Set eax to buffer start
        pop     ecx
        lea     edx, [ecx + 2]  ; Set edx to complete buffer size
        mov     ebx, LOOPBACK_DEVICE
 
  .done:
        DEBUGF  DEBUG_NETWORK_VERBOSE, "LOOP_output: ptr=%x size=%u\n", eax, edx
        ret
 
  .out_of_ram:
        DEBUGF  DEBUG_NETWORK_VERBOSE, "LOOP_output: failed\n"
        add     esp, 2+4
        sub     edi, edi
        ret

Rev 3555	Rev 3589
1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2	;; ;;	2	;; ;;
3	;; Copyright (C) KolibriOS team 2004-2010. All rights reserved. ;;	3	;; Copyright (C) KolibriOS team 2004-2010. All rights reserved. ;;
4	;; Distributed under terms of the GNU General Public License ;;	4	;; Distributed under terms of the GNU General Public License ;;
5	;; ;;	5	;; ;;
6	;; loopback.inc ;;	6	;; loopback.inc ;;
7	;; ;;	7	;; ;;
8	;; LoopBack device for KolibriOS ;;	8	;; LoopBack device for KolibriOS ;;
9	;; ;;	9	;; ;;
10	;; Written by hidnplayr@kolibrios.org ;;	10	;; Written by hidnplayr@kolibrios.org ;;
11	;; ;;	11	;; ;;
12	;; GNU GENERAL PUBLIC LICENSE ;;	12	;; GNU GENERAL PUBLIC LICENSE ;;
13	;; Version 2, June 1991 ;;	13	;; Version 2, June 1991 ;;
14	;; ;;	14	;; ;;
15	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;	15	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
16		16
17	$Revision: 2891 $	17	$Revision: 2891 $
18		18
19	iglobal	19	iglobal
20		20
21	LOOPBACK_DEVICE:	21	LOOPBACK_DEVICE:
22	.type dd NET_TYPE_LOOPBACK	22	.type dd NET_TYPE_LOOPBACK
23	.mtu dd 4096	23	.mtu dd 4096
24	.name dd .namestr	24	.name dd .namestr
25		25
26	.unload dd .dummy_fn	26	.unload dd .dummy_fn
27	.reset dd .dummy_fn	27	.reset dd .dummy_fn
28	.transmit dd LOOP_input	28	.transmit dd LOOP_input
29		29
30	.bytes_tx dq 0	30	.bytes_tx dq 0
31	.bytes_rx dq 0	31	.bytes_rx dq 0
32	.packets_tx dd 0	32	.packets_tx dd 0
33	.packets_rx dd 0	33	.packets_rx dd 0
34		34
35	.namestr db 'loopback', 0	35	.namestr db 'loopback', 0
36		36
37	.dummy_fn:	37	.dummy_fn:
38	ret	38	ret
39		39
40	endg	40	endg
41		41
42	;-----------------------------------------------------------------	42	;-----------------------------------------------------------------
43	;	43	;
44	; LOOP_input	44	; LOOP_input
45	;	45	;
46	; IN: [esp+4] = Pointer to buffer	46	; IN: [esp+4] = Pointer to buffer
47	; [esp+8] = size of buffer	47	; [esp+8] = size of buffer
48	;	48	;
49	; OUT: /	49	; OUT: /
50	;	50	;
51	;-----------------------------------------------------------------	51	;-----------------------------------------------------------------
52	align 4	52	align 4
53	LOOP_input:	53	LOOP_input:
54	pop ebx	54	pop ebx
55	pop eax	55	pop eax
56	pop ecx	56	pop ecx
57		57
58	push ebx	58	push ebx
59	push ecx	59	push ecx
60	push eax	60	push eax
61		61
62	DEBUGF 1,"LOOP_input: size=%u\n", ecx	62	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: size=%u\n", ecx
63	lea edx, [eax + 2]	63	lea edx, [eax + 2]
64	mov ax, word[eax]	64	mov ax, word[eax]
65	mov ebx, LOOPBACK_DEVICE	65	mov ebx, LOOPBACK_DEVICE
66		66
67	cmp ax, ETHER_IPv4	67	cmp ax, ETHER_IPv4
68	je IPv4_input	68	je IPv4_input
69		69
70	DEBUGF 2,"LOOP_input: Unknown packet type=%x\n", ax	70	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: Unknown packet type=%x\n", ax
71		71
72	.dump:	72	.dump:
73	DEBUGF 2,"LOOP_input: dumping\n"	73	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: dumping\n"
74	call kernel_free	74	call kernel_free
75	add esp, 4	75	add esp, 4
76	ret	76	ret
77		77
78	;-----------------------------------------------------------------	78	;-----------------------------------------------------------------
79	;	79	;
80	; LOOP_output	80	; LOOP_output
81	;	81	;
82	; IN:	82	; IN:
83	; ecx = packet size	83	; ecx = packet size
84	; di = protocol	84	; di = protocol
85	;	85	;
86	; OUT: edi = 0 on error, pointer to buffer otherwise	86	; OUT: edi = 0 on error, pointer to buffer otherwise
87	; eax = buffer start	87	; eax = buffer start
88	; ebx = to device structure	88	; ebx = to device structure
89	; ecx = unchanged (packet size of embedded data)	89	; ecx = unchanged (packet size of embedded data)
90	; edx = size of complete buffer	90	; edx = size of complete buffer
91	;	91	;
92	;-----------------------------------------------------------------	92	;-----------------------------------------------------------------
93	align 4	93	align 4
94	LOOP_output:	94	LOOP_output:
95		95
96	DEBUGF 1,"LOOP_output\n"	96	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output\n"
97		97
98	push ecx	98	push ecx
99	push di	99	push di
100		100
101	add ecx, 2	101	add ecx, 2
102	cmp ecx, [LOOPBACK_DEVICE.mtu]	102	cmp ecx, [LOOPBACK_DEVICE.mtu]
103	ja .out_of_ram	103	ja .out_of_ram
104	stdcall kernel_alloc, ecx	104	stdcall kernel_alloc, ecx
105	test eax, eax	105	test eax, eax
106	jz .out_of_ram	106	jz .out_of_ram
107	mov edi, eax	107	mov edi, eax
108	pop ax	108	pop ax
109	stosw	109	stosw
110		110
111	lea eax, [edi - 2] ; Set eax to buffer start	111	lea eax, [edi - 2] ; Set eax to buffer start
112	pop ecx	112	pop ecx
113	lea edx, [ecx + 2] ; Set edx to complete buffer size	113	lea edx, [ecx + 2] ; Set edx to complete buffer size
114	mov ebx, LOOPBACK_DEVICE	114	mov ebx, LOOPBACK_DEVICE
115		115
116	.done:	116	.done:
117	DEBUGF 2,"LOOP_output: ptr=%x size=%u\n", eax, edx	117	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output: ptr=%x size=%u\n", eax, edx
118	ret	118	ret
119		119
120	.out_of_ram:	120	.out_of_ram:
121	DEBUGF 2,"LOOP_output: failed\n"	121	DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output: failed\n"
122	add esp, 2+4	122	add esp, 2+4
123	sub edi, edi	123	sub edi, edi
124	ret	124	ret

Subversion Repositories Kolibri OS

(root)/kernel/branches/Kolibri-acpi/network/loopback.inc – Rev 3555 → 3589