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