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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 | |
3601 | hidnplayr | 23 | .device_type dd NET_DEVICE_LOOPBACK |
24 | .mtu dd 4096 |
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25 | .name dd .namestr |
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3545 | hidnplayr | 26 | |
3601 | hidnplayr | 27 | .unload dd .dummy_fn |
28 | .reset dd .dummy_fn |
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29 | .transmit dd LOOP_input |
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3545 | hidnplayr | 30 | |
3601 | hidnplayr | 31 | .bytes_tx dq 0 |
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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3545 | hidnplayr | 35 | |
3601 | hidnplayr | 36 | .link_state dd -1 |
37 | .hwacc dd 0 |
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3545 | hidnplayr | 38 | |
3601 | hidnplayr | 39 | .namestr db 'loopback', 0 |
40 | |||
3545 | hidnplayr | 41 | .dummy_fn: |
42 | ret |
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43 | |||
44 | endg |
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45 | |||
3601 | hidnplayr | 46 | |
47 | macro LOOP_init { |
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48 | local .fail |
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49 | |||
50 | mov ebx, LOOPBACK_DEVICE |
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51 | call NET_add_device |
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52 | |||
53 | cmp eax, -1 |
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54 | je .fail |
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55 | |||
56 | mov [IP_LIST], 127 + 1 shl 24 |
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57 | mov [SUBNET_LIST], 255 |
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58 | mov [BROADCAST_LIST], 0xffffff00 + 127 |
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59 | |||
60 | .fail: |
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61 | } |
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62 | |||
3545 | hidnplayr | 63 | ;----------------------------------------------------------------- |
64 | ; |
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65 | ; LOOP_input |
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66 | ; |
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3600 | hidnplayr | 67 | ; IN: [esp+4] = Pointer to buffer |
3545 | hidnplayr | 68 | ; [esp+8] = size of buffer |
69 | ; |
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70 | ; OUT: / |
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71 | ; |
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72 | ;----------------------------------------------------------------- |
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73 | align 4 |
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74 | LOOP_input: |
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75 | pop ebx |
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76 | pop eax |
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77 | pop ecx |
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78 | |||
79 | push ebx |
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80 | push ecx |
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81 | push eax |
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82 | |||
3556 | hidnplayr | 83 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: size=%u\n", ecx |
3600 | hidnplayr | 84 | lea edx, [eax + 4] |
85 | mov eax, dword[eax] |
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3545 | hidnplayr | 86 | mov ebx, LOOPBACK_DEVICE |
87 | |||
3600 | hidnplayr | 88 | cmp eax, AF_INET4 |
3545 | hidnplayr | 89 | je IPv4_input |
90 | |||
3556 | hidnplayr | 91 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: Unknown packet type=%x\n", ax |
3545 | hidnplayr | 92 | |
93 | .dump: |
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3556 | hidnplayr | 94 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: dumping\n" |
3545 | hidnplayr | 95 | call kernel_free |
96 | add esp, 4 |
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97 | ret |
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98 | |||
99 | ;----------------------------------------------------------------- |
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100 | ; |
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101 | ; LOOP_output |
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102 | ; |
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103 | ; IN: |
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104 | ; ecx = packet size |
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105 | ; di = protocol |
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106 | ; |
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107 | ; OUT: edi = 0 on error, pointer to buffer otherwise |
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108 | ; eax = buffer start |
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109 | ; ebx = to device structure |
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110 | ; ecx = unchanged (packet size of embedded data) |
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111 | ; edx = size of complete buffer |
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112 | ; |
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113 | ;----------------------------------------------------------------- |
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114 | align 4 |
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115 | LOOP_output: |
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116 | |||
3556 | hidnplayr | 117 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output\n" |
3545 | hidnplayr | 118 | |
119 | push ecx |
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3600 | hidnplayr | 120 | push edi |
3545 | hidnplayr | 121 | |
3600 | hidnplayr | 122 | add ecx, 4 |
3545 | hidnplayr | 123 | cmp ecx, [LOOPBACK_DEVICE.mtu] |
124 | ja .out_of_ram |
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125 | stdcall kernel_alloc, ecx |
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126 | test eax, eax |
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127 | jz .out_of_ram |
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128 | mov edi, eax |
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3600 | hidnplayr | 129 | pop eax |
130 | stosd |
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3545 | hidnplayr | 131 | |
3600 | hidnplayr | 132 | lea eax, [edi - 4] ; Set eax to buffer start |
3545 | hidnplayr | 133 | pop ecx |
3600 | hidnplayr | 134 | lea edx, [ecx + 4] ; Set edx to complete buffer size |
3545 | hidnplayr | 135 | mov ebx, LOOPBACK_DEVICE |
136 | |||
137 | .done: |
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3556 | hidnplayr | 138 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output: ptr=%x size=%u\n", eax, edx |
3545 | hidnplayr | 139 | ret |
140 | |||
141 | .out_of_ram: |
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3556 | hidnplayr | 142 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output: failed\n" |
3600 | hidnplayr | 143 | add esp, 4+4 |
144 | xor edi, edi |
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3545 | hidnplayr | 145 | ret |
146 |