forked from KolibriOS/kolibrios
127 lines
3.5 KiB
PHP
127 lines
3.5 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; ;;
|
|
;; 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
|
|
|
|
|