forked from KolibriOS/kolibrios
161 lines
4.3 KiB
PHP
161 lines
4.3 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2015. 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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$Revision$
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iglobal
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align 4
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LOOPBACK_DEVICE:
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.device_type dd NET_DEVICE_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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.link_state dd -1
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.hwacc dd NET_HWACC_TCP_IPv4_IN + NET_HWACC_TCP_IPv4_OUT
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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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macro LOOP_init {
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local .fail
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mov ebx, LOOPBACK_DEVICE
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call NET_add_device
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cmp eax, -1
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je .fail
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mov [IP_LIST], 127 + 1 shl 24
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mov [SUBNET_LIST], 255
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mov [BROADCAST_LIST], 0xffffff00 + 127
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.fail:
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}
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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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;
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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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mov eax, [esp+4]
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; Update stats
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inc [LOOPBACK_DEVICE.packets_rx]
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mov ecx, [eax + NET_BUFF.length]
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add dword[LOOPBACK_DEVICE.bytes_rx], ecx
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adc dword[LOOPBACK_DEVICE.bytes_rx + 4], 0
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DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: ptr=%x size=%u\n", eax, ecx
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; Reverse buffptr and returnaddr on stack
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pop edx edi
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push edx edi
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; Set registers for protocol handlers
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lea edx, [eax + NET_BUFF.data]
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mov ebx, [eax + NET_BUFF.device]
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mov eax, [eax + NET_BUFF.type]
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; Place protocol handlers here
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cmp eax, AF_INET4
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je IPv4_input
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DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: Unknown packet type=%x\n", eax
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.dump:
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DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: dumping\n"
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call NET_BUFF_free
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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: ecx = packet size
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; edi = address family
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;
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; OUT: eax = start of net frame / 0 on error
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; ebx = to device structure
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; ecx = unchanged (packet size of embedded data)
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; edi = start of payload
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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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cmp ecx, [LOOPBACK_DEVICE.mtu]
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ja .too_large
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push ecx edi
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stdcall NET_BUFF_alloc, ecx
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test eax, eax
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jz .out_of_ram
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pop edi
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mov [eax + NET_BUFF.type], edi
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mov ebx, LOOPBACK_DEVICE
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mov [eax + NET_BUFF.device], ebx
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pop ecx
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mov [eax + NET_BUFF.length], ecx
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lea edi, [eax + NET_BUFF.data]
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inc [LOOPBACK_DEVICE.packets_tx]
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add dword[LOOPBACK_DEVICE.bytes_tx], ecx
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adc dword[LOOPBACK_DEVICE.bytes_tx + 4], 0
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DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output: ptr=%x size=%u\n", eax, ecx
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ret
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.too_large:
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DEBUGF DEBUG_NETWORK_ERROR, "LOOP_output: packet is too large\n"
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xor eax, eax
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ret
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.out_of_ram:
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DEBUGF DEBUG_NETWORK_ERROR, "LOOP_output: out of memory\n"
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add esp, 4+4
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xor eax, eax
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ret
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