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3545 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3610 | hidnplayr | 3 | ;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;; |
3545 | hidnplayr | 4 | ;; Distributed under terms of the GNU General Public License ;; |
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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3698 | hidnplayr | 20 | align 4 |
3545 | hidnplayr | 21 | |
22 | LOOPBACK_DEVICE: |
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3600 | hidnplayr | 23 | |
3601 | hidnplayr | 24 | .device_type dd NET_DEVICE_LOOPBACK |
25 | .mtu dd 4096 |
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26 | .name dd .namestr |
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3545 | hidnplayr | 27 | |
3601 | hidnplayr | 28 | .unload dd .dummy_fn |
29 | .reset dd .dummy_fn |
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30 | .transmit dd LOOP_input |
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3545 | hidnplayr | 31 | |
3601 | hidnplayr | 32 | .bytes_tx dq 0 |
33 | .bytes_rx dq 0 |
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34 | .packets_tx dd 0 |
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35 | .packets_rx dd 0 |
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3545 | hidnplayr | 36 | |
3601 | hidnplayr | 37 | .link_state dd -1 |
38 | .hwacc dd 0 |
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3545 | hidnplayr | 39 | |
3601 | hidnplayr | 40 | .namestr db 'loopback', 0 |
41 | |||
3545 | hidnplayr | 42 | .dummy_fn: |
43 | ret |
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44 | |||
45 | endg |
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46 | |||
3601 | hidnplayr | 47 | |
48 | macro LOOP_init { |
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49 | local .fail |
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50 | |||
51 | mov ebx, LOOPBACK_DEVICE |
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52 | call NET_add_device |
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53 | |||
54 | cmp eax, -1 |
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55 | je .fail |
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56 | |||
57 | mov [IP_LIST], 127 + 1 shl 24 |
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58 | mov [SUBNET_LIST], 255 |
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59 | mov [BROADCAST_LIST], 0xffffff00 + 127 |
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60 | |||
61 | .fail: |
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62 | } |
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63 | |||
3545 | hidnplayr | 64 | ;----------------------------------------------------------------- |
65 | ; |
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66 | ; LOOP_input |
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67 | ; |
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3600 | hidnplayr | 68 | ; IN: [esp+4] = Pointer to buffer |
3545 | hidnplayr | 69 | ; [esp+8] = size of buffer |
70 | ; |
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71 | ; OUT: / |
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72 | ; |
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73 | ;----------------------------------------------------------------- |
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74 | align 4 |
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75 | LOOP_input: |
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76 | pop ebx |
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77 | pop eax |
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78 | pop ecx |
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79 | |||
80 | push ebx |
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81 | push ecx |
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82 | push eax |
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83 | |||
3610 | hidnplayr | 84 | inc [LOOPBACK_DEVICE.packets_rx] |
85 | add dword[LOOPBACK_DEVICE.bytes_rx], ecx |
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86 | adc dword[LOOPBACK_DEVICE.bytes_rx + 4], 0 |
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87 | |||
3556 | hidnplayr | 88 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: size=%u\n", ecx |
3600 | hidnplayr | 89 | lea edx, [eax + 4] |
90 | mov eax, dword[eax] |
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3545 | hidnplayr | 91 | mov ebx, LOOPBACK_DEVICE |
92 | |||
3600 | hidnplayr | 93 | cmp eax, AF_INET4 |
3545 | hidnplayr | 94 | je IPv4_input |
95 | |||
3556 | hidnplayr | 96 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: Unknown packet type=%x\n", ax |
3545 | hidnplayr | 97 | |
98 | .dump: |
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3556 | hidnplayr | 99 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: dumping\n" |
3545 | hidnplayr | 100 | call kernel_free |
101 | add esp, 4 |
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102 | ret |
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103 | |||
104 | ;----------------------------------------------------------------- |
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105 | ; |
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106 | ; LOOP_output |
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107 | ; |
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108 | ; IN: |
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3610 | hidnplayr | 109 | ; ecx = packet size |
110 | ; edi = address family |
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3545 | hidnplayr | 111 | ; |
3610 | hidnplayr | 112 | ; OUT: edi = 0 on error, pointer to buffer otherwise |
113 | ; eax = buffer start |
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114 | ; ebx = to device structure |
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115 | ; ecx = unchanged (packet size of embedded data) |
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116 | ; edx = size of complete buffer |
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3545 | hidnplayr | 117 | ; |
118 | ;----------------------------------------------------------------- |
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119 | align 4 |
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120 | LOOP_output: |
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121 | |||
3556 | hidnplayr | 122 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output\n" |
3545 | hidnplayr | 123 | |
124 | push ecx |
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3600 | hidnplayr | 125 | push edi |
3545 | hidnplayr | 126 | |
3600 | hidnplayr | 127 | add ecx, 4 |
3545 | hidnplayr | 128 | cmp ecx, [LOOPBACK_DEVICE.mtu] |
129 | ja .out_of_ram |
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130 | stdcall kernel_alloc, ecx |
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131 | test eax, eax |
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132 | jz .out_of_ram |
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133 | mov edi, eax |
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3600 | hidnplayr | 134 | pop eax |
135 | stosd |
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3545 | hidnplayr | 136 | |
3600 | hidnplayr | 137 | lea eax, [edi - 4] ; Set eax to buffer start |
3545 | hidnplayr | 138 | pop ecx |
3600 | hidnplayr | 139 | lea edx, [ecx + 4] ; Set edx to complete buffer size |
3545 | hidnplayr | 140 | mov ebx, LOOPBACK_DEVICE |
141 | |||
3610 | hidnplayr | 142 | inc [LOOPBACK_DEVICE.packets_tx] |
143 | add dword[LOOPBACK_DEVICE.bytes_tx], ecx |
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144 | adc dword[LOOPBACK_DEVICE.bytes_tx + 4], 0 |
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145 | |||
3556 | hidnplayr | 146 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output: ptr=%x size=%u\n", eax, edx |
3545 | hidnplayr | 147 | ret |
148 | |||
149 | .out_of_ram: |
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3610 | hidnplayr | 150 | DEBUGF DEBUG_NETWORK_ERROR, "LOOP_output: out of memory\n" |
3600 | hidnplayr | 151 | add esp, 4+4 |
152 | xor edi, edi |
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3545 | hidnplayr | 153 | ret |
154 |