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Rev | Author | Line No. | Line |
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3555 | Serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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5565 | serge | 3 | ;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;; |
3555 | Serge | 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 | |||
6078 | serge | 17 | $Revision: 6011 $ |
3555 | Serge | 18 | |
19 | iglobal |
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3725 | Serge | 20 | align 4 |
3555 | Serge | 21 | |
22 | LOOPBACK_DEVICE: |
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23 | |||
3626 | Serge | 24 | .device_type dd NET_DEVICE_LOOPBACK |
25 | .mtu dd 4096 |
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26 | .name dd .namestr |
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3555 | Serge | 27 | |
3626 | Serge | 28 | .unload dd .dummy_fn |
29 | .reset dd .dummy_fn |
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6078 | serge | 30 | .transmit dd loop_input |
3555 | Serge | 31 | |
3626 | Serge | 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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3555 | Serge | 36 | |
3626 | Serge | 37 | .link_state dd -1 |
4423 | Serge | 38 | .hwacc dd NET_HWACC_TCP_IPv4_IN + NET_HWACC_TCP_IPv4_OUT |
3626 | Serge | 39 | |
40 | .namestr db 'loopback', 0 |
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41 | |||
3555 | Serge | 42 | .dummy_fn: |
3725 | Serge | 43 | ret |
3555 | Serge | 44 | |
45 | endg |
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46 | |||
3626 | Serge | 47 | |
6078 | serge | 48 | macro loop_init { |
3626 | Serge | 49 | local .fail |
50 | |||
51 | mov ebx, LOOPBACK_DEVICE |
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6078 | serge | 52 | call net_add_device |
3626 | Serge | 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 | |||
5984 | serge | 64 | ;-----------------------------------------------------------------; |
65 | ; ; |
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6078 | serge | 66 | ; loop_input ; |
5984 | serge | 67 | ; ; |
68 | ; IN: [esp+4] = Pointer to buffer ; |
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69 | ; ; |
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70 | ; OUT: / ; |
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71 | ; ; |
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72 | ;-----------------------------------------------------------------; |
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3555 | Serge | 73 | align 4 |
6078 | serge | 74 | loop_input: |
3555 | Serge | 75 | |
5565 | serge | 76 | mov eax, [esp+4] |
3555 | Serge | 77 | |
5565 | serge | 78 | ; Update stats |
3626 | Serge | 79 | inc [LOOPBACK_DEVICE.packets_rx] |
5565 | serge | 80 | |
81 | mov ecx, [eax + NET_BUFF.length] |
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3626 | Serge | 82 | add dword[LOOPBACK_DEVICE.bytes_rx], ecx |
83 | adc dword[LOOPBACK_DEVICE.bytes_rx + 4], 0 |
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84 | |||
5565 | serge | 85 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: ptr=%x size=%u\n", eax, ecx |
3555 | Serge | 86 | |
5565 | serge | 87 | ; Reverse buffptr and returnaddr on stack |
88 | pop edx edi |
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89 | push edx edi |
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90 | |||
91 | ; Set registers for protocol handlers |
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92 | lea edx, [eax + NET_BUFF.data] |
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93 | mov ebx, [eax + NET_BUFF.device] |
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94 | mov eax, [eax + NET_BUFF.type] |
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95 | |||
96 | ; Place protocol handlers here |
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3626 | Serge | 97 | cmp eax, AF_INET4 |
6078 | serge | 98 | je ipv4_input |
3555 | Serge | 99 | |
5565 | serge | 100 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: Unknown packet type=%x\n", eax |
3555 | Serge | 101 | |
102 | .dump: |
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3589 | Serge | 103 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_input: dumping\n" |
6078 | serge | 104 | call net_buff_free |
3555 | Serge | 105 | ret |
106 | |||
5565 | serge | 107 | |
5984 | serge | 108 | ;-----------------------------------------------------------------; |
109 | ; ; |
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6078 | serge | 110 | ; loop_output ; |
5984 | serge | 111 | ; ; |
112 | ; IN: ecx = packet size ; |
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113 | ; edi = address family ; |
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114 | ; ; |
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115 | ; OUT: eax = start of net frame / 0 on error ; |
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116 | ; ebx = to device structure ; |
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117 | ; ecx = unchanged (packet size of embedded data) ; |
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118 | ; edi = start of payload ; |
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119 | ; ; |
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120 | ;-----------------------------------------------------------------; |
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3555 | Serge | 121 | align 4 |
6078 | serge | 122 | loop_output: |
3555 | Serge | 123 | |
3589 | Serge | 124 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output\n" |
3555 | Serge | 125 | |
5565 | serge | 126 | cmp ecx, [LOOPBACK_DEVICE.mtu] |
127 | ja .too_large |
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3555 | Serge | 128 | |
5565 | serge | 129 | push ecx edi |
130 | add ecx, NET_BUFF.data |
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6078 | serge | 131 | stdcall net_buff_alloc, ecx |
3555 | Serge | 132 | test eax, eax |
133 | jz .out_of_ram |
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134 | |||
5565 | serge | 135 | pop edi |
136 | mov [eax + NET_BUFF.type], edi |
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137 | mov ebx, LOOPBACK_DEVICE |
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138 | mov [eax + NET_BUFF.device], ebx |
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3555 | Serge | 139 | pop ecx |
5565 | serge | 140 | mov [eax + NET_BUFF.length], ecx |
141 | lea edi, [eax + NET_BUFF.data] |
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3555 | Serge | 142 | |
3626 | Serge | 143 | inc [LOOPBACK_DEVICE.packets_tx] |
144 | add dword[LOOPBACK_DEVICE.bytes_tx], ecx |
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145 | adc dword[LOOPBACK_DEVICE.bytes_tx + 4], 0 |
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146 | |||
5565 | serge | 147 | DEBUGF DEBUG_NETWORK_VERBOSE, "LOOP_output: ptr=%x size=%u\n", eax, ecx |
3555 | Serge | 148 | ret |
149 | |||
5565 | serge | 150 | .too_large: |
151 | DEBUGF DEBUG_NETWORK_ERROR, "LOOP_output: packet is too large\n" |
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152 | xor eax, eax |
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153 | ret |
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154 | |||
3555 | Serge | 155 | .out_of_ram: |
3626 | Serge | 156 | DEBUGF DEBUG_NETWORK_ERROR, "LOOP_output: out of memory\n" |
157 | add esp, 4+4 |
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5565 | serge | 158 | xor eax, eax |
3555 | Serge | 159 | ret |
160 |