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Rev | Author | Line No. | Line |
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1 | ha | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; ETHERNET.INC ;; |
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4 | ;; ;; |
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5 | ;; Ethernet network layer for Menuet OS ;; |
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6 | ;; ;; |
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7 | ;; Version 0.4 22 September 2003 ;; |
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8 | ;; ;; |
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9 | ;; This file contains the following: ;; |
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10 | ;; PCI bus scanning for valid devices ;; |
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11 | ;; Table of supported ethernet drivers ;; |
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12 | ;; Code to identify and activate a supported driver ;; |
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13 | ;; ARP handler ;; |
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14 | ;; Driver interface to the IP layer ;; |
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15 | ;; Gateway support ;; |
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16 | ;; ;; |
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17 | ;; Individual driver files are included here ;; |
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18 | ;; ;; |
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19 | ;; The PCI bus scanning code was ported from the etherboot ;; |
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20 | ;; 5.0.6 project. The copyright statement for that code is ;; |
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21 | ;; ;; |
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22 | ;; GNU GENERAL PUBLIC LICENSE ;; |
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23 | ;; Version 2, June 1991 ;; |
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24 | ;; ;; |
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25 | ;; remaining parts Copyright 2002 Mike Hibbett ;; |
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26 | ;; mikeh@oceanfree.net ;; |
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27 | ;; ;; |
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28 | ;; See file COPYING for details ;; |
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29 | ;; ;; |
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30 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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31 | |||
32 | ;******************************************************************** |
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33 | ; Interface |
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34 | ; ethernet_driver called by stack_handler in stack.inc |
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35 | ; eth_probe called by app_stack_handler in stack.inc |
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36 | ; |
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37 | ;******************************************************************** |
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38 | |||
261 | hidnplayr | 39 | ETHER_IP equ 0x0008 ; Reversed from 0800 for intel |
40 | ETHER_ARP equ 0x0608 ; Reversed from 0806 for intel |
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41 | ETHER_RARP equ 0x3580 |
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42 | |||
43 | struc ETH_FRAME |
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44 | { .DstMAC dp ? ;destination MAC-address [6 bytes] |
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45 | .SrcMAC dp ? ;source MAC-address [6 bytes] |
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46 | .Type dw ? ;type of the upper-layer protocol [2 bytes] |
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47 | .Data db ? ;data [46-1500 bytes] |
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48 | } |
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49 | |||
50 | virtual at Ether_buffer |
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51 | ETH_FRAME ETH_FRAME |
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52 | end virtual |
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53 | |||
54 | |||
1 | ha | 55 | ; Some useful information on data structures |
56 | |||
57 | ; Ethernet Packet - ARP Request example |
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58 | ; |
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59 | ; 0 1 2 3 |
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60 | ; 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
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61 | ; |
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62 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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63 | ; | Dest H/W Address | |
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64 | ; | ( 14 byte header ) | |
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65 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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66 | ; | | Source H/W Address | |
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67 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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68 | ; | | |
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69 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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70 | ; | Protocol - ARP 08 06 | |
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71 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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72 | |||
73 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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74 | ; | H/W Type 00 01 | Protocol Type 08 00 | |
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75 | ; | ( ARP Request packet ) | |
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76 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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77 | ; | HLen 0x06 | PLen 0x04 | OpCode 00 01 | |
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78 | ; | ( 0001 for request, 0002 for reply ) | |
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79 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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80 | ; | Source Hardware Address ( MAC Address ) | |
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81 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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82 | ; | | Source IP Address | |
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83 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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84 | ; | | Destination Hardware Address | |
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85 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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86 | ; | | |
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87 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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88 | ; | Destination IP Address | |
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89 | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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90 | |||
91 | ; Include individual drivers source files at this point. |
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92 | ; If you create a new driver, include it below. |
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93 | |||
261 | hidnplayr | 94 | include "drivers/rtl8029.inc" |
95 | include "drivers/i8255x.inc" |
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96 | include "drivers/rtl8139.inc" |
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97 | include "drivers/3c59x.inc" |
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98 | include "drivers/sis900.inc" |
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99 | include "drivers/pcnet32.inc" |
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1 | ha | 100 | |
101 | ; PCICards |
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102 | ; ======== |
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103 | ; PCI vendor and hardware types for hardware supported by the above drivers |
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104 | ; If you add a driver, ensure you update this datastructure, otherwise the |
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105 | ; card will not be probed. |
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106 | ; Each driver is defined by 4 double words. These are |
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107 | ; PCIVendorDevice probeFunction ResetFunction PollFunction transmitFunction |
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108 | ; The last entry must be kept at all zeros, to indicate the end of the list |
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109 | ; As a PCI driver may support more than one hardware implementation, there may |
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110 | ; be several lines which refer to the same functions. |
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111 | ; The first driver found on the PCI bus will be the one used. |
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112 | |||
113 | PCICARDS_ENTRY_SIZE equ 20 ; Size of each PCICARDS entry |
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114 | |||
115 | iglobal |
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116 | PCICards: |
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117 | dd 0x12098086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit |
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118 | dd 0x10298086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit |
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119 | dd 0x12298086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit |
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120 | dd 0x10308086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit |
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121 | dd 0x24498086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit |
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122 | dd 0x802910ec, rtl8029_probe, rtl8029_reset, rtl8029_poll, rtl8029_transmit |
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123 | dd 0x12111113, rtl8029_probe, rtl8029_reset, rtl8029_poll, rtl8029_transmit |
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124 | dd 0x813910ec, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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108 | heavyiron | 125 | ; /+/ Новые вендоры сетевых карт на базе rtl8139 |
126 | dd 0x813810ec, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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127 | dd 0x12111113, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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128 | dd 0x13601500, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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129 | dd 0x13604033, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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130 | dd 0x13001186, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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131 | dd 0x13401186, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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132 | dd 0xab0613d1, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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133 | dd 0xa1171259, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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134 | dd 0xa11e1259, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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135 | dd 0xab0614ea, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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136 | dd 0xab0714ea, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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137 | dd 0x123411db, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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138 | dd 0x91301432, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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139 | dd 0x101202ac, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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140 | dd 0x0106018a, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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141 | dd 0x1211126c, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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142 | dd 0x81391743, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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143 | dd 0x8139021b, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit |
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144 | ; /-/ |
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1 | ha | 145 | dd 0x590010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
146 | dd 0x592010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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147 | dd 0x597010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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148 | dd 0x595010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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149 | dd 0x595110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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150 | dd 0x595210b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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151 | dd 0x900010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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152 | dd 0x900110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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153 | dd 0x900410b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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154 | dd 0x900510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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155 | dd 0x900610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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156 | dd 0x900A10b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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157 | dd 0x905010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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158 | dd 0x905110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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159 | dd 0x905510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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160 | dd 0x905810b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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161 | dd 0x905A10b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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162 | dd 0x920010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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163 | dd 0x980010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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164 | dd 0x980510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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165 | dd 0x764610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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166 | dd 0x505510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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167 | dd 0x605510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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168 | dd 0x605610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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169 | dd 0x5b5710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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170 | dd 0x505710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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171 | dd 0x515710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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172 | dd 0x525710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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173 | dd 0x656010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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174 | dd 0x656210b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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175 | dd 0x656410b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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176 | dd 0x450010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit |
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177 | dd 0x09001039, SIS900_probe, SIS900_reset, SIS900_poll, SIS900_transmit |
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178 | dd 0x20001022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit |
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179 | dd 0x26251022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit |
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180 | dd 0x20011022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit |
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181 | ; following card is untested |
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182 | dd 0x70161039, SIS900_probe, SIS900_reset, SIS900_poll, SIS900_transmit |
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183 | dd 0,0,0,0,0 ; end of list marker, do not remove |
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184 | endg |
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185 | |||
186 | uglobal |
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261 | hidnplayr | 187 | ;Net-stack's interface's settings |
1 | ha | 188 | node_addr: db 0,0,0,0,0,0 |
261 | hidnplayr | 189 | gateway_ip: db 0, 0, 0, 0 |
190 | dns_ip: dd 0 |
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191 | |||
1 | ha | 192 | eth_rx_data_len: dw 0 |
193 | eth_status: dd 0 |
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194 | io_addr: dd 0 |
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195 | hdrtype: db 0 |
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196 | vendor_device: dd 0 |
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197 | pci_data: dd 0 |
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198 | pci_dev: dd 0 |
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199 | pci_bus: dd 0 |
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200 | |||
201 | ; These will hold pointers to the selected driver functions |
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202 | drvr_probe: dd 0 |
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203 | drvr_reset: dd 0 |
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204 | drvr_poll: dd 0 |
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205 | drvr_transmit: dd 0 |
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206 | |||
207 | endg |
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208 | |||
209 | iglobal |
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210 | broadcast_add: db 0xff,0xff,0xff,0xff,0xff,0xff |
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261 | hidnplayr | 211 | subnet_mask: dd 0x00ffffff ; 255.255.255.0 |
1 | ha | 212 | endg |
213 | |||
261 | hidnplayr | 214 | include "arp.inc" ;arp-protocol functions |
215 | include "pci.inc" ;PCI bus access functions |
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1 | ha | 216 | |
217 | |||
218 | ;*************************************************************************** |
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219 | ; Function |
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220 | ; eth_tx |
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221 | ; |
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222 | ; Description |
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223 | ; Looks at the NET1OUT_QUEUE for data to send. |
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224 | ; Stores that destination IP in a location used by the tx routine |
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225 | ; Looks up the MAC address in the ARP table; stores that where |
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226 | ; the tx routine can get it |
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227 | ; Get the length of the data. Store that where the tx routine wants it |
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228 | ; Call tx |
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229 | ; Places buffer on empty queue when the tx routine finished |
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230 | ; |
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231 | ;*************************************************************************** |
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261 | hidnplayr | 232 | proc eth_tx stdcall uses ebx esi edi |
233 | local MACAddress dp ? ;allocate 6 bytes in the stack |
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234 | |||
1 | ha | 235 | ; Look for a buffer to tx |
236 | mov eax, NET1OUT_QUEUE |
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237 | call dequeue |
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238 | cmp ax, NO_BUFFER |
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261 | hidnplayr | 239 | je .exit ; Exit if no buffer available |
1 | ha | 240 | |
261 | hidnplayr | 241 | push eax ;save buffer number |
1 | ha | 242 | |
243 | ; convert buffer pointer eax to the absolute address |
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261 | hidnplayr | 244 | imul eax, IPBUFFSIZE |
1 | ha | 245 | add eax, IPbuffs |
246 | |||
247 | ; Extract the destination IP |
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248 | ; find the destination IP in the ARP table, get MAC |
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249 | ; store this MAC in 'MACAddress' |
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250 | mov ebx, eax ; Save buffer address |
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251 | mov edx, [ebx + 16] ; get destination address |
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252 | |||
253 | ; If the destination address is 255.255.255.255, |
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254 | ; set the MACAddress to all ones ( broadcast ) |
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261 | hidnplayr | 255 | cld |
256 | mov esi, broadcast_add |
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257 | lea edi, [MACAddress] |
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258 | movsd |
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259 | movsw |
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1 | ha | 260 | cmp edx, 0xffffffff |
261 | hidnplayr | 261 | je .send ; If it is broadcast, just send |
1 | ha | 262 | |
261 | hidnplayr | 263 | lea eax, [MACAddress] ;cause this is local variable |
264 | stdcall arp_table_manager, ARP_TABLE_IP_TO_MAC, edx, eax ;opcode,IP,MAC_ptr - Get the MAC address. |
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1 | ha | 265 | |
266 | cmp eax, ARP_VALID_MAPPING |
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261 | hidnplayr | 267 | je .send |
1 | ha | 268 | |
261 | hidnplayr | 269 | ; No valid entry. Has the request been sent, but timed out? |
1 | ha | 270 | cmp eax, ARP_RESPONSE_TIMEOUT |
261 | hidnplayr | 271 | je .freebuf |
1 | ha | 272 | |
261 | hidnplayr | 273 | .wait_response: ;we wait arp-response |
274 | ; Re-queue the packet, and exit |
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1 | ha | 275 | pop ebx |
276 | mov eax, NET1OUT_QUEUE |
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261 | hidnplayr | 277 | call queue ; Get the buffer back |
278 | jmp .exit |
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1 | ha | 279 | |
261 | hidnplayr | 280 | .send: ;if ARP_VALID_MAPPING then send the packet |
281 | lea edi, [MACAddress] ; Pointer to 48 bit destination address |
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282 | movzx ecx, word[ebx+2] ; Size of IP packet to send |
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283 | xchg ch, cl ; because mirror byte-order |
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284 | mov esi, ebx ; Pointer to packet data |
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285 | mov bx, ETHER_IP ; Type of packet |
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286 | call dword [drvr_transmit] ; Call the drivers transmit function |
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1 | ha | 287 | |
288 | ; OK, we have sent a packet, so increment the count |
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289 | inc dword [ip_tx_count] |
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290 | |||
291 | ; And finally, return the buffer to the free queue |
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261 | hidnplayr | 292 | .freebuf: |
1 | ha | 293 | pop eax |
294 | call freeBuff |
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295 | |||
261 | hidnplayr | 296 | .exit: |
1 | ha | 297 | ret |
261 | hidnplayr | 298 | endp |
1 | ha | 299 | |
300 | ;*************************************************************************** |
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301 | ; Function |
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302 | ; ether_IP_handler |
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303 | ; |
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304 | ; Description |
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305 | ; Called when an IP ethernet packet is received on the ethernet |
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306 | ; Header + Data is in Ether_buffer[] |
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307 | ; We just need to get a buffer from the 'free' queue, and |
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308 | ; store the packet in it, then insert the packet number into the |
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309 | ; IPRX queue. |
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310 | ; If no queue entry is available, the packet is silently discarded |
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311 | ; All registers may be destroyed |
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312 | ; |
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313 | ;*************************************************************************** |
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314 | ether_IP_handler: |
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315 | mov eax, EMPTY_QUEUE |
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316 | call dequeue |
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317 | cmp ax, NO_BUFFER |
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318 | je eiph00x |
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319 | |||
320 | ; convert buffer pointer eax to the absolute address |
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321 | push eax |
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322 | mov ecx, IPBUFFSIZE |
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323 | mul ecx |
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324 | add eax, IPbuffs |
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325 | |||
326 | mov edi, eax |
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327 | |||
328 | ; get a pointer to the start of the DATA |
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261 | hidnplayr | 329 | mov esi, ETH_FRAME.Data |
1 | ha | 330 | |
331 | ; Now store it all away |
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332 | mov ecx, IPBUFFSIZE / 4 ; Copy all of the available |
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333 | ; data across - worse case |
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334 | cld |
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335 | rep movsd |
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336 | |||
337 | ; And finally, place the buffer in the IPRX queue |
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338 | pop ebx |
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339 | mov eax, IPIN_QUEUE |
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340 | call queue |
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341 | |||
342 | eiph00x: |
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343 | ret |
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344 | |||
345 | ;*************************************************************************** |
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346 | ; Function |
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261 | hidnplayr | 347 | ; eth_probe |
1 | ha | 348 | ; Description |
261 | hidnplayr | 349 | ; Searches for an ethernet card. If found, the card is enabled and |
350 | ; the ethernet -> IP link established |
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1 | ha | 351 | ; |
261 | hidnplayr | 352 | ; This function scans the PCI bus looking for a supported device. |
353 | ; ISA bus is currently not supported. |
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1 | ha | 354 | ; |
261 | hidnplayr | 355 | ; eax is 0 if no hardware found |
1 | ha | 356 | ;*************************************************************************** |
261 | hidnplayr | 357 | eth_probe: |
358 | ; Find a card on the PCI bus, and get it's address |
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359 | call scan_bus ; Find the ethernet cards PIC address |
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1 | ha | 360 | xor eax, eax |
261 | hidnplayr | 361 | cmp [io_addr], eax |
362 | je ep_00x ; Return 0 in eax if no cards found |
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1 | ha | 363 | |
261 | hidnplayr | 364 | call dword [drvr_probe] ; Call the drivers probe function |
1 | ha | 365 | |
261 | hidnplayr | 366 | mov eax, [io_addr] ; return a non zero value |
1 | ha | 367 | |
261 | hidnplayr | 368 | ep_00x: |
1 | ha | 369 | ret |
370 | |||
371 | ;*************************************************************************** |
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372 | ; Function |
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261 | hidnplayr | 373 | ; ethernet_driver |
1 | ha | 374 | ; |
375 | ; Description |
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261 | hidnplayr | 376 | ; The ethernet RX and TX handler |
377 | ; This is a kernel function, called by stack_handler |
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1 | ha | 378 | ; |
379 | ;*************************************************************************** |
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261 | hidnplayr | 380 | ethernet_driver: |
381 | ; Do nothing if the driver is inactive |
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382 | cmp [ethernet_active], byte 0 |
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383 | je eth_exit |
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1 | ha | 384 | |
261 | hidnplayr | 385 | call eth_rx |
386 | call eth_tx |
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1 | ha | 387 | |
261 | hidnplayr | 388 | eth_exit: |
1 | ha | 389 | ret |
390 | |||
391 | ;*************************************************************************** |
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392 | ; Function |
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261 | hidnplayr | 393 | ; eth_rx |
1 | ha | 394 | ; |
395 | ; Description |
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261 | hidnplayr | 396 | ; Polls the ethernet card for received data. Extracts if present |
397 | ; Depending on the Protocol within the packet: |
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398 | ; ARP : Pass to ARP_handler. This may result in an ARP reply |
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399 | ; being tx'ed |
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400 | ; IP : Store in an IP buffer |
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1 | ha | 401 | ; |
402 | ;*************************************************************************** |
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261 | hidnplayr | 403 | eth_rx: |
404 | xor ax, ax |
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405 | mov [eth_rx_data_len], ax |
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406 | call dword [drvr_poll] ; Call the drivers poll function |
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1 | ha | 407 | |
261 | hidnplayr | 408 | mov ax, [eth_rx_data_len] |
409 | cmp ax, 0 |
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410 | je .exit |
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1 | ha | 411 | |
412 | |||
261 | hidnplayr | 413 | ; Check the protocol. Call appropriate handler |
1 | ha | 414 | |
261 | hidnplayr | 415 | mov ax, [ETH_FRAME.Type] ; The address of the protocol word |
1 | ha | 416 | |
261 | hidnplayr | 417 | cmp ax, ETHER_IP |
418 | je .is_ip ; It's IP |
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1 | ha | 419 | |
261 | hidnplayr | 420 | cmp ax, ETHER_ARP |
421 | je .is_arp ; It is ARP |
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1 | ha | 422 | |
261 | hidnplayr | 423 | jmp .exit ; If not IP or ARP, ignore |
1 | ha | 424 | |
261 | hidnplayr | 425 | .is_ip: |
426 | inc dword [ip_rx_count] |
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427 | call ether_IP_handler |
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428 | jmp .exit |
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1 | ha | 429 | |
261 | hidnplayr | 430 | .is_arp: |
1 | ha | 431 | |
261 | hidnplayr | 432 | ; At this point, the packet is still in the Ether_buffer |
433 | call arp_handler |
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1 | ha | 434 | |
261 | hidnplayr | 435 | .exit: |
436 | ret |