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3545 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2010. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;; loopback.inc ;; |
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7 | ;; ;; |
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8 | ;; LoopBack device for KolibriOS ;; |
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9 | ;; ;; |
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10 | ;; Written by hidnplayr@kolibrios.org ;; |
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11 | ;; ;; |
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12 | ;; GNU GENERAL PUBLIC LICENSE ;; |
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13 | ;; Version 2, June 1991 ;; |
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14 | ;; ;; |
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15 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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16 | |||
17 | $Revision: 2891 $ |
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18 | |||
19 | iglobal |
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20 | |||
21 | LOOPBACK_DEVICE: |
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3600 | hidnplayr | 22 | |
23 | .device_type dd NET_DEVICE_LOOPBACK |
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3545 | hidnplayr | 24 | .mtu dd 4096 |
25 | .name dd .namestr |
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26 | |||
27 | .unload dd .dummy_fn |
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28 | .reset dd .dummy_fn |
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29 | .transmit dd LOOP_input |
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30 | |||
31 | .bytes_tx dq 0 |
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32 | .bytes_rx dq 0 |
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33 | .packets_tx dd 0 |
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34 | .packets_rx dd 0 |
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35 | |||
36 | .namestr db 'loopback', 0 |
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37 | |||
38 | .dummy_fn: |
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39 | ret |
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40 | |||
41 | endg |
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42 | |||
43 | ;----------------------------------------------------------------- |
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44 | ; |
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45 | ; LOOP_input |
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46 | ; |
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3600 | hidnplayr | 47 | ; IN: [esp+4] = Pointer to buffer |
3545 | hidnplayr | 48 | ; [esp+8] = size of buffer |
49 | ; |
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50 | ; OUT: / |
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51 | ; |
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52 | ;----------------------------------------------------------------- |
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53 | align 4 |
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54 | LOOP_input: |
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55 | pop ebx |
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56 | pop eax |
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57 | pop ecx |
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58 | |||
59 | push ebx |
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60 | push ecx |
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61 | push eax |
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62 | |||
3556 | hidnplayr | 63 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: size=%u\n", ecx |
3600 | hidnplayr | 64 | lea edx, [eax + 4] |
65 | mov eax, dword[eax] |
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3545 | hidnplayr | 66 | mov ebx, LOOPBACK_DEVICE |
67 | |||
3600 | hidnplayr | 68 | cmp eax, AF_INET4 |
3545 | hidnplayr | 69 | je IPv4_input |
70 | |||
3556 | hidnplayr | 71 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: Unknown packet type=%x\n", ax |
3545 | hidnplayr | 72 | |
73 | .dump: |
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3556 | hidnplayr | 74 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: dumping\n" |
3545 | hidnplayr | 75 | call kernel_free |
76 | add esp, 4 |
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77 | ret |
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78 | |||
79 | ;----------------------------------------------------------------- |
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80 | ; |
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81 | ; LOOP_output |
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82 | ; |
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83 | ; IN: |
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84 | ; ecx = packet size |
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85 | ; di = protocol |
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86 | ; |
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87 | ; OUT: edi = 0 on error, pointer to buffer otherwise |
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88 | ; eax = buffer start |
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89 | ; ebx = to device structure |
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90 | ; ecx = unchanged (packet size of embedded data) |
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91 | ; edx = size of complete buffer |
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92 | ; |
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93 | ;----------------------------------------------------------------- |
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94 | align 4 |
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95 | LOOP_output: |
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96 | |||
3556 | hidnplayr | 97 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output\n" |
3545 | hidnplayr | 98 | |
99 | push ecx |
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3600 | hidnplayr | 100 | push edi |
3545 | hidnplayr | 101 | |
3600 | hidnplayr | 102 | add ecx, 4 |
3545 | hidnplayr | 103 | cmp ecx, [LOOPBACK_DEVICE.mtu] |
104 | ja .out_of_ram |
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105 | stdcall kernel_alloc, ecx |
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106 | test eax, eax |
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107 | jz .out_of_ram |
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108 | mov edi, eax |
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3600 | hidnplayr | 109 | pop eax |
110 | stosd |
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3545 | hidnplayr | 111 | |
3600 | hidnplayr | 112 | lea eax, [edi - 4] ; Set eax to buffer start |
3545 | hidnplayr | 113 | pop ecx |
3600 | hidnplayr | 114 | lea edx, [ecx + 4] ; Set edx to complete buffer size |
3545 | hidnplayr | 115 | mov ebx, LOOPBACK_DEVICE |
116 | |||
117 | .done: |
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3556 | hidnplayr | 118 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output: ptr=%x size=%u\n", eax, edx |
3545 | hidnplayr | 119 | ret |
120 | |||
121 | .out_of_ram: |
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3556 | hidnplayr | 122 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output: failed\n" |
3600 | hidnplayr | 123 | add esp, 4+4 |
124 | xor edi, edi |
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3545 | hidnplayr | 125 | ret |
126 |