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3545 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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5363 | yogev_ezra | 3 | ;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;; |
3545 | hidnplayr | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;; ARP.INC ;; |
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7 | ;; ;; |
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8 | ;; Part of the tcp/ip network stack for KolibriOS ;; |
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9 | ;; ;; |
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10 | ;; Based on the work of [Johnny_B] and [smb] ;; |
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11 | ;; ;; |
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12 | ;; Written by hidnplayr@kolibrios.org ;; |
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13 | ;; ;; |
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14 | ;; GNU GENERAL PUBLIC LICENSE ;; |
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15 | ;; Version 2, June- 1991 ;; |
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16 | ;; ;; |
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17 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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18 | |||
4850 | mario79 | 19 | $Revision: 7535 $ |
3545 | hidnplayr | 20 | |
21 | ARP_NO_ENTRY = 0 |
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22 | ARP_VALID_MAPPING = 1 |
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23 | ARP_AWAITING_RESPONSE = 2 |
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24 | ARP_RESPONSE_TIMEOUT = 3 |
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25 | |||
26 | ARP_REQUEST_TTL = 31 ; 20 s |
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27 | ARP_ENTRY_TTL = 937 ; 600 s |
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28 | ARP_STATIC_ENTRY = -1 |
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29 | |||
30 | ARP_REQ_OPCODE = 0x0100 ; request |
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31 | ARP_REP_OPCODE = 0x0200 ; reply |
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32 | |||
33 | ARP_TABLE_SIZE = 20 ; Size of table |
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34 | |||
3601 | hidnplayr | 35 | struct ARP_entry |
3545 | hidnplayr | 36 | |
3601 | hidnplayr | 37 | IP dd ? |
38 | MAC dp ? |
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39 | Status dw ? |
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40 | TTL dw ? |
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3545 | hidnplayr | 41 | |
42 | ends |
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43 | |||
3601 | hidnplayr | 44 | struct ARP_header |
3545 | hidnplayr | 45 | |
3601 | hidnplayr | 46 | HardwareType dw ? |
47 | ProtocolType dw ? |
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48 | HardwareSize db ? |
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49 | ProtocolSize db ? |
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50 | Opcode dw ? |
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51 | SenderMAC dp ? |
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52 | SenderIP dd ? |
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53 | TargetMAC dp ? |
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54 | TargetIP dd ? |
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3545 | hidnplayr | 55 | |
56 | ends |
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57 | |||
3698 | hidnplayr | 58 | uglobal |
3545 | hidnplayr | 59 | align 4 |
60 | |||
3601 | hidnplayr | 61 | ARP_table rb NET_DEVICES_MAX*(ARP_TABLE_SIZE * sizeof.ARP_entry) |
3545 | hidnplayr | 62 | |
3601 | hidnplayr | 63 | ARP_entries_num rd NET_DEVICES_MAX |
3600 | hidnplayr | 64 | ARP_PACKETS_TX rd NET_DEVICES_MAX |
65 | ARP_PACKETS_RX rd NET_DEVICES_MAX |
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66 | ARP_CONFLICTS rd NET_DEVICES_MAX |
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3545 | hidnplayr | 67 | |
68 | |||
69 | endg |
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70 | |||
71 | |||
72 | |||
6011 | hidnplayr | 73 | ;-----------------------------------------------------------------; |
74 | ; ; |
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75 | ; arp_init: Resets all ARP variables. ; |
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76 | ; ; |
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77 | ;-----------------------------------------------------------------; |
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78 | macro arp_init { |
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3545 | hidnplayr | 79 | |
80 | xor eax, eax |
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3601 | hidnplayr | 81 | mov edi, ARP_entries_num |
82 | mov ecx, 4*NET_DEVICES_MAX |
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3711 | clevermous | 83 | rep stosd |
3545 | hidnplayr | 84 | |
85 | } |
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86 | |||
6011 | hidnplayr | 87 | ;-----------------------------------------------------------------; |
88 | ; ; |
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89 | ; arp_decrease_entry_ttls ; |
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90 | ; ; |
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91 | ;-----------------------------------------------------------------; |
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92 | macro arp_decrease_entry_ttls { |
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3545 | hidnplayr | 93 | |
94 | local .loop |
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95 | local .exit |
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96 | |||
97 | ; The TTL field is decremented every second, and is deleted when it reaches 0. |
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98 | ; It is refreshed every time a packet is received. |
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99 | ; If the TTL field is 0xFFFF it is a static entry and is never deleted. |
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100 | ; The status field can be the following values: |
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101 | ; 0x0000 entry not used |
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102 | ; 0x0001 entry holds a valid mapping |
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103 | ; 0x0002 entry contains an IP address, awaiting ARP response |
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104 | ; 0x0003 No response received to ARP request. |
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105 | ; The last status value is provided to allow the network layer to delete |
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106 | ; a packet that is queued awaiting an ARP response |
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107 | |||
3601 | hidnplayr | 108 | xor edi, edi |
109 | .loop_outer: |
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110 | mov ecx, [ARP_entries_num + 4*edi] |
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3545 | hidnplayr | 111 | test ecx, ecx |
112 | jz .exit |
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113 | |||
3601 | hidnplayr | 114 | mov esi, (ARP_TABLE_SIZE * sizeof.ARP_entry) |
115 | imul esi, edi |
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116 | add esi, ARP_table |
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3545 | hidnplayr | 117 | .loop: |
118 | cmp [esi + ARP_entry.TTL], ARP_STATIC_ENTRY |
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119 | je .next |
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120 | |||
121 | dec [esi + ARP_entry.TTL] |
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122 | jz .time_out |
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123 | |||
124 | .next: |
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125 | add esi, sizeof.ARP_entry |
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126 | dec ecx |
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127 | jnz .loop |
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128 | jmp .exit |
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129 | |||
130 | .time_out: |
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131 | cmp [esi + ARP_entry.Status], ARP_AWAITING_RESPONSE |
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132 | je .response_timeout |
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133 | |||
3601 | hidnplayr | 134 | push esi edi ecx |
6011 | hidnplayr | 135 | call arp_del_entry |
3601 | hidnplayr | 136 | pop ecx edi esi |
3545 | hidnplayr | 137 | |
138 | jmp .next |
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139 | |||
140 | .response_timeout: |
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141 | mov [esi + ARP_entry.Status], ARP_RESPONSE_TIMEOUT |
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142 | mov [esi + ARP_entry.TTL], 10 |
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143 | |||
144 | jmp .next |
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145 | |||
146 | .exit: |
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3601 | hidnplayr | 147 | inc edi |
148 | cmp edi, NET_DEVICES_MAX |
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149 | jb .loop_outer |
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3545 | hidnplayr | 150 | |
151 | } |
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152 | |||
153 | |||
6011 | hidnplayr | 154 | ;-----------------------------------------------------------------; |
155 | ; ; |
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156 | ; arp_input ; |
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157 | ; ; |
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158 | ; IN: [esp] = Pointer to buffer ; |
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159 | ; [esp+4] = size of buffer ; |
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160 | ; ecx = packet size (without ethernet header) ; |
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161 | ; edx = packet ptr ; |
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162 | ; ebx = device ptr ; |
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163 | ; ; |
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164 | ; OUT: / ; |
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165 | ; ; |
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166 | ;-----------------------------------------------------------------; |
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3545 | hidnplayr | 167 | align 4 |
6011 | hidnplayr | 168 | arp_input: |
3545 | hidnplayr | 169 | |
170 | ;----------------------------------------- |
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171 | ; Check validity and print some debug info |
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172 | |||
173 | cmp ecx, sizeof.ARP_header |
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174 | jb .exit |
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175 | |||
6011 | hidnplayr | 176 | call net_ptr_to_num4 |
3545 | hidnplayr | 177 | cmp edi, -1 |
178 | jz .exit |
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179 | |||
3643 | hidnplayr | 180 | inc [ARP_PACKETS_RX + edi] ; update stats |
3545 | hidnplayr | 181 | |
3643 | hidnplayr | 182 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_input: got packet from %u.%u.%u.%u (device*4=%u)\n",\ |
3545 | hidnplayr | 183 | [edx + ARP_header.SenderIP]:1, [edx + ARP_header.SenderIP + 1]:1,\ |
184 | [edx + ARP_header.SenderIP + 2]:1, [edx + ARP_header.SenderIP + 3]:1, edi |
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185 | |||
186 | ;------------------------------ |
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187 | ; First, check for IP collision |
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188 | |||
189 | mov eax, [edx + ARP_header.SenderIP] |
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3643 | hidnplayr | 190 | cmp eax, [IP_LIST + edi] |
3545 | hidnplayr | 191 | je .collision |
192 | |||
193 | ;--------------------- |
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194 | ; Handle reply packets |
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195 | |||
196 | cmp [edx + ARP_header.Opcode], ARP_REP_OPCODE |
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197 | jne .maybe_request |
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198 | |||
3556 | hidnplayr | 199 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_input: It's a reply\n" |
3545 | hidnplayr | 200 | |
3643 | hidnplayr | 201 | mov ecx, [ARP_entries_num + edi] |
3545 | hidnplayr | 202 | test ecx, ecx |
203 | jz .exit |
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204 | |||
3643 | hidnplayr | 205 | mov esi, edi |
206 | imul esi, (ARP_TABLE_SIZE * sizeof.ARP_entry)/4 |
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3601 | hidnplayr | 207 | add esi, ARP_table |
3545 | hidnplayr | 208 | .loop: |
209 | cmp [esi + ARP_entry.IP], eax |
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210 | je .gotit |
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211 | add esi, sizeof.ARP_entry |
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212 | dec ecx |
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213 | jnz .loop |
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214 | |||
3556 | hidnplayr | 215 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_input: no matching entry found\n" |
3545 | hidnplayr | 216 | jmp .exit |
217 | |||
218 | .gotit: |
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3556 | hidnplayr | 219 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_input: found matching entry\n" |
3545 | hidnplayr | 220 | |
221 | cmp [esi + ARP_entry.TTL], ARP_STATIC_ENTRY ; if it is a static entry, dont touch it |
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222 | je .exit |
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223 | |||
3556 | hidnplayr | 224 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_input: updating entry\n" |
3545 | hidnplayr | 225 | |
226 | mov [esi + ARP_entry.Status], ARP_VALID_MAPPING |
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227 | mov [esi + ARP_entry.TTL], ARP_ENTRY_TTL |
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228 | |||
229 | mov eax, dword [edx + ARP_header.SenderMAC] |
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230 | mov dword [esi + ARP_entry.MAC], eax |
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231 | mov cx, word [edx + ARP_header.SenderMAC + 4] |
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232 | mov word [esi + ARP_entry.MAC + 4], cx |
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233 | |||
234 | jmp .exit |
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235 | |||
236 | ;----------------------- |
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237 | ; Handle request packets |
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238 | |||
239 | .maybe_request: |
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240 | cmp [edx + ARP_header.Opcode], ARP_REQ_OPCODE |
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241 | jne .exit |
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242 | |||
3556 | hidnplayr | 243 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_input: its a request\n" |
3545 | hidnplayr | 244 | |
3643 | hidnplayr | 245 | mov eax, [IP_LIST + edi] |
3545 | hidnplayr | 246 | cmp eax, [edx + ARP_header.TargetIP] ; Is it looking for my IP address? |
247 | jne .exit |
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248 | |||
249 | push eax |
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250 | push edi |
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251 | |||
252 | ; OK, it is a request for one of our MAC addresses. |
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253 | ; Build the frame and send it. We can reuse the buffer. (faster then using ARP_create_packet) |
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254 | |||
255 | lea esi, [edx + ARP_header.SenderMAC] |
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256 | lea edi, [edx + ARP_header.TargetMAC] |
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257 | movsd ; Move Sender Mac to Dest MAC |
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258 | movsw ; |
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259 | movsd ; Move sender IP to Dest IP |
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260 | |||
261 | pop esi |
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3643 | hidnplayr | 262 | mov esi, [NET_DRV_LIST + esi] |
3545 | hidnplayr | 263 | lea esi, [esi + ETH_DEVICE.mac] |
264 | lea edi, [edx + ARP_header.SenderMAC] |
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265 | movsd ; Copy MAC address from in MAC_LIST |
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266 | movsw ; |
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267 | pop eax |
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268 | stosd ; Write our IP |
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269 | |||
270 | mov [edx + ARP_header.Opcode], ARP_REP_OPCODE |
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271 | |||
272 | ; Now, Fill in ETHERNET header |
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273 | |||
274 | mov edi, [esp] |
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7535 | hidnplayr | 275 | add edi, [edi + NET_BUFF.offset] |
3545 | hidnplayr | 276 | lea esi, [edx + ARP_header.TargetMAC] |
277 | movsd |
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278 | movsw |
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279 | lea esi, [edx + ARP_header.SenderMAC] |
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280 | movsd |
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281 | movsw |
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282 | ; mov ax , ETHER_ARP ; It's already there, I'm sure of it! |
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283 | ; stosw |
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284 | |||
3556 | hidnplayr | 285 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_input: Sending reply\n" |
3545 | hidnplayr | 286 | |
287 | call [ebx + NET_DEVICE.transmit] |
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288 | ret |
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289 | |||
290 | .collision: |
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3643 | hidnplayr | 291 | inc [ARP_CONFLICTS + edi] |
3556 | hidnplayr | 292 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_input: IP address conflict detected!\n" |
3545 | hidnplayr | 293 | |
294 | .exit: |
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3556 | hidnplayr | 295 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_input: exiting\n" |
6011 | hidnplayr | 296 | call net_buff_free |
3545 | hidnplayr | 297 | ret |
298 | |||
6011 | hidnplayr | 299 | ;-----------------------------------------------------------------; |
300 | ; ; |
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301 | ; arp_output_request ; |
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302 | ; ; |
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303 | ; IN: ebx = device ptr ; |
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304 | ; eax = IP ; |
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305 | ; ; |
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306 | ; OUT: scratched: probably everything ; |
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307 | ; ; |
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308 | ;-----------------------------------------------------------------; |
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3545 | hidnplayr | 309 | align 4 |
6011 | hidnplayr | 310 | arp_output_request: |
3545 | hidnplayr | 311 | |
3601 | hidnplayr | 312 | push eax |
3545 | hidnplayr | 313 | |
3601 | hidnplayr | 314 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_output_request: ip=%u.%u.%u.%u device=0x%x\n",\ |
315 | [esp]:1, [esp + 1]:1, [esp + 2]:1, [esp + 3]:1, ebx |
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3545 | hidnplayr | 316 | |
5015 | hidnplayr | 317 | mov ax, ETHER_PROTO_ARP |
318 | mov ecx, sizeof.ARP_header |
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3545 | hidnplayr | 319 | mov edx, ETH_BROADCAST ; broadcast mac |
6011 | hidnplayr | 320 | call eth_output |
3545 | hidnplayr | 321 | jz .exit |
322 | |||
323 | mov [edi + ARP_header.HardwareType], 0x0100 ; Ethernet |
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324 | mov [edi + ARP_header.ProtocolType], 0x0008 ; IP |
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325 | mov [edi + ARP_header.HardwareSize], 6 ; MAC-addr length |
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326 | mov [edi + ARP_header.ProtocolSize], 4 ; IP-addr length |
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327 | mov [edi + ARP_header.Opcode], ARP_REQ_OPCODE ; Request |
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328 | |||
329 | add edi, ARP_header.SenderMAC |
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330 | lea esi, [ebx + ETH_DEVICE.mac] ; SenderMac |
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331 | movsw ; |
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332 | movsd ; |
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333 | |||
3644 | hidnplayr | 334 | push edi |
6011 | hidnplayr | 335 | call net_ptr_to_num4 |
3644 | hidnplayr | 336 | inc [ARP_PACKETS_TX + edi] ; assume we will succeed |
337 | lea esi, [IP_LIST + edi] ; SenderIP |
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338 | pop edi |
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3601 | hidnplayr | 339 | movsd |
3545 | hidnplayr | 340 | |
3601 | hidnplayr | 341 | mov esi, ETH_BROADCAST ; DestMac |
342 | movsw ; |
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343 | movsd ; |
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344 | popd [edi] ; DestIP |
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3545 | hidnplayr | 345 | |
5522 | hidnplayr | 346 | push eax |
3545 | hidnplayr | 347 | call [ebx + NET_DEVICE.transmit] |
348 | ret |
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349 | |||
350 | .exit: |
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3601 | hidnplayr | 351 | add esp, 4 |
352 | DEBUGF DEBUG_NETWORK_ERROR, "ARP_output_request: send failed\n" |
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3545 | hidnplayr | 353 | ret |
354 | |||
355 | |||
6011 | hidnplayr | 356 | ;-----------------------------------------------------------------; |
357 | ; ; |
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358 | ; arp_add_entry: Add or update an entry in the ARP table. ; |
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359 | ; ; |
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360 | ; IN: esi = ptr to entry (can easily be made on the stack) ; |
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361 | ; edi = device num*4 ; |
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362 | ; ; |
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363 | ; OUT: eax = entry number on success ; |
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364 | ; eax = -1 on error ; |
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365 | ; esi = ptr to newly created entry ; |
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366 | ; ; |
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367 | ;-----------------------------------------------------------------; |
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3545 | hidnplayr | 368 | align 4 |
6011 | hidnplayr | 369 | arp_add_entry: |
3545 | hidnplayr | 370 | |
6011 | hidnplayr | 371 | ; TODO: use a mutex to lock ARP table |
372 | |||
3601 | hidnplayr | 373 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_add_entry: device=%u\n", edi |
3545 | hidnplayr | 374 | |
3638 | hidnplayr | 375 | mov ecx, [ARP_entries_num + edi] |
3545 | hidnplayr | 376 | cmp ecx, ARP_TABLE_SIZE ; list full ? |
3601 | hidnplayr | 377 | jae .full |
3545 | hidnplayr | 378 | |
3601 | hidnplayr | 379 | ; From this point on, we can only fail if IP has a static entry, or if table is corrupt. |
380 | |||
3638 | hidnplayr | 381 | inc [ARP_entries_num + edi] ; assume we will succeed |
3601 | hidnplayr | 382 | |
383 | push edi |
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384 | xor ecx, ecx |
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3638 | hidnplayr | 385 | imul edi, ARP_TABLE_SIZE*sizeof.ARP_entry/4 |
3601 | hidnplayr | 386 | add edi, ARP_table |
3609 | hidnplayr | 387 | mov eax, [esi + ARP_entry.IP] |
3545 | hidnplayr | 388 | .loop: |
389 | cmp [edi + ARP_entry.Status], ARP_NO_ENTRY ; is this slot empty? |
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390 | je .add |
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391 | |||
3601 | hidnplayr | 392 | cmp [edi + ARP_entry.IP], eax ; if not, check if it doesnt collide |
3545 | hidnplayr | 393 | jne .maybe_next |
394 | |||
395 | cmp [edi + ARP_entry.TTL], ARP_STATIC_ENTRY ; ok, its the same IP, update it if not static |
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396 | jne .add |
||
397 | |||
3601 | hidnplayr | 398 | DEBUGF DEBUG_NETWORK_ERROR, "ARP_add_entry: failed, IP already has a static entry\n" |
399 | jmp .error |
||
400 | |||
3545 | hidnplayr | 401 | .maybe_next: ; try the next slot |
402 | add edi, sizeof.ARP_entry |
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3601 | hidnplayr | 403 | inc ecx |
404 | cmp ecx, ARP_TABLE_SIZE |
||
405 | jb .loop |
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3545 | hidnplayr | 406 | |
407 | .add: |
||
3601 | hidnplayr | 408 | push ecx |
3545 | hidnplayr | 409 | mov ecx, sizeof.ARP_entry/2 |
3711 | clevermous | 410 | rep movsw |
3601 | hidnplayr | 411 | pop ecx |
412 | lea esi, [edi - sizeof.ARP_entry] |
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413 | pop edi |
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414 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_add_entry: entry=%u\n", ecx |
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3545 | hidnplayr | 415 | |
416 | ret |
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417 | |||
418 | .error: |
||
3601 | hidnplayr | 419 | pop edi |
3638 | hidnplayr | 420 | dec [ARP_entries_num + edi] |
3601 | hidnplayr | 421 | DEBUGF DEBUG_NETWORK_ERROR, "ARP_add_entry_failed\n" |
422 | .full: |
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3545 | hidnplayr | 423 | mov eax, -1 |
424 | ret |
||
425 | |||
426 | |||
6011 | hidnplayr | 427 | ;-----------------------------------------------------------------; |
428 | ; ; |
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429 | ; arp_del_entry: Remove an entry from the ARP table. ; |
||
430 | ; ; |
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431 | ; IN: esi = ptr to arp entry ; |
||
432 | ; edi = device number ; |
||
433 | ; ; |
||
434 | ; OUT: / ; |
||
435 | ; ; |
||
436 | ;-----------------------------------------------------------------; |
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3545 | hidnplayr | 437 | align 4 |
6011 | hidnplayr | 438 | arp_del_entry: |
3545 | hidnplayr | 439 | |
6011 | hidnplayr | 440 | ; TODO: use a mutex to lock ARP table |
441 | |||
442 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_del_entry: entry=0x%x entrys=%u\n", esi, [ARP_entries_num + 4*edi] |
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3556 | hidnplayr | 443 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_del_entry: IP=%u.%u.%u.%u\n", \ |
3545 | hidnplayr | 444 | [esi + ARP_entry.IP]:1, [esi + ARP_entry.IP + 1]:1, [esi + ARP_entry.IP + 2]:1, [esi + ARP_entry.IP + 3]:1 |
445 | |||
3601 | hidnplayr | 446 | push edi |
447 | imul edi, (ARP_TABLE_SIZE) * sizeof.ARP_entry |
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448 | lea ecx, [ARP_table + (ARP_TABLE_SIZE - 1) * sizeof.ARP_entry + edi] |
||
3545 | hidnplayr | 449 | sub ecx, esi |
450 | shr ecx, 1 |
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451 | |||
3601 | hidnplayr | 452 | ; move all trailing entries, sizeof.ARP_entry bytes to left. |
3545 | hidnplayr | 453 | mov edi, esi |
454 | add esi, sizeof.ARP_entry |
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3711 | clevermous | 455 | rep movsw |
3545 | hidnplayr | 456 | |
3601 | hidnplayr | 457 | ; now add an empty entry to the end (erasing previous one) |
3545 | hidnplayr | 458 | xor eax, eax |
459 | mov ecx, sizeof.ARP_entry/2 |
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3711 | clevermous | 460 | rep stosw |
3545 | hidnplayr | 461 | |
3601 | hidnplayr | 462 | pop edi |
463 | dec [ARP_entries_num + 4*edi] |
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3556 | hidnplayr | 464 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_del_entry: success\n" |
3545 | hidnplayr | 465 | |
466 | ret |
||
467 | |||
468 | |||
469 | |||
470 | |||
471 | |||
6011 | hidnplayr | 472 | ;-----------------------------------------------------------------; |
473 | ; ; |
||
474 | ; arp_ip_to_mac: Translate an IP address to a MAC address. ; |
||
475 | ; ; |
||
476 | ; IN: eax = IPv4 address ; |
||
477 | ; edi = device number * 4 ; |
||
478 | ; ; |
||
479 | ; OUT: eax = -1 on error ; |
||
480 | ; eax = -2 when request send ; |
||
481 | ; eax = first two bytes of mac on success ; |
||
482 | ; ebx = last four bytes of mac on success ; |
||
483 | ; edi = unchanged ; |
||
484 | ; ; |
||
485 | ;-----------------------------------------------------------------; |
||
3545 | hidnplayr | 486 | align 4 |
6011 | hidnplayr | 487 | arp_ip_to_mac: |
3545 | hidnplayr | 488 | |
3556 | hidnplayr | 489 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_IP_to_MAC: %u.%u", al, ah |
3545 | hidnplayr | 490 | rol eax, 16 |
3638 | hidnplayr | 491 | DEBUGF DEBUG_NETWORK_VERBOSE, ".%u.%u device*4: %u\n", al, ah, edi |
3545 | hidnplayr | 492 | rol eax, 16 |
493 | |||
494 | cmp eax, 0xffffffff |
||
495 | je .broadcast |
||
496 | |||
497 | ;-------------------------------- |
||
498 | ; Try to find the IP in ARP_table |
||
499 | |||
3640 | hidnplayr | 500 | mov ecx, [ARP_entries_num + edi] |
3545 | hidnplayr | 501 | test ecx, ecx |
502 | jz .not_in_list |
||
3609 | hidnplayr | 503 | mov esi, edi |
3640 | hidnplayr | 504 | imul esi, (sizeof.ARP_entry * ARP_TABLE_SIZE)/4 |
3609 | hidnplayr | 505 | add esi, ARP_table + ARP_entry.IP |
3545 | hidnplayr | 506 | .scan_loop: |
507 | cmp [esi], eax |
||
508 | je .found_it |
||
509 | add esi, sizeof.ARP_entry |
||
3601 | hidnplayr | 510 | dec ecx |
511 | jnz .scan_loop |
||
3545 | hidnplayr | 512 | |
513 | .not_in_list: |
||
3556 | hidnplayr | 514 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_IP_to_MAC: preparing for ARP request\n" |
3545 | hidnplayr | 515 | |
516 | push eax edi ; save IP for ARP_output_request |
||
3601 | hidnplayr | 517 | ; Now craft the ARP entry on the stack |
3545 | hidnplayr | 518 | pushw ARP_REQUEST_TTL ; TTL |
519 | pushw ARP_AWAITING_RESPONSE ; status |
||
520 | pushd 0 ; mac |
||
521 | pushw 0 |
||
6011 | hidnplayr | 522 | pushd eax ; IP |
3545 | hidnplayr | 523 | mov esi, esp |
3601 | hidnplayr | 524 | |
525 | ; Add it to the list |
||
6011 | hidnplayr | 526 | call arp_add_entry |
3601 | hidnplayr | 527 | |
528 | ; Delete the temporary entry |
||
3545 | hidnplayr | 529 | add esp, sizeof.ARP_entry ; clear the entry from stack |
530 | |||
3601 | hidnplayr | 531 | ; If we could not add it to the list, give up |
3545 | hidnplayr | 532 | cmp eax, -1 ; did ARP_add_entry fail? |
533 | je .full |
||
534 | |||
3601 | hidnplayr | 535 | ;----------------------------------------------- |
536 | ; At this point, we got an ARP entry in the list |
||
3545 | hidnplayr | 537 | |
3601 | hidnplayr | 538 | ; Now send a request packet on the network |
539 | pop edi eax ; IP in eax, device number in ebx, for ARP_output_request |
||
540 | |||
3545 | hidnplayr | 541 | push esi edi |
3638 | hidnplayr | 542 | mov ebx, [NET_DRV_LIST + edi] |
6011 | hidnplayr | 543 | call arp_output_request |
3545 | hidnplayr | 544 | pop edi esi |
545 | .found_it: |
||
546 | cmp [esi + ARP_entry.Status], ARP_VALID_MAPPING ; Does it have a MAC assigned? |
||
547 | je .valid |
||
548 | |||
549 | if ARP_BLOCK |
||
550 | |||
551 | cmp [esi + ARP_entry.Status], ARP_AWAITING_RESPONSE ; Are we waiting for reply from remote end? |
||
552 | jne .give_up |
||
3602 | hidnplayr | 553 | push esi |
3545 | hidnplayr | 554 | mov esi, 10 ; wait 10 ms |
555 | call delay_ms |
||
3602 | hidnplayr | 556 | pop esi |
3545 | hidnplayr | 557 | jmp .found_it ; now check again |
558 | |||
559 | else |
||
560 | |||
561 | jmp .give_up |
||
562 | |||
563 | end if |
||
564 | |||
565 | .valid: |
||
3556 | hidnplayr | 566 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_IP_to_MAC: found MAC\n" |
3602 | hidnplayr | 567 | movzx eax, word[esi + ARP_entry.MAC] |
568 | mov ebx, dword[esi + ARP_entry.MAC + 2] |
||
3545 | hidnplayr | 569 | ret |
570 | |||
571 | .full: |
||
3556 | hidnplayr | 572 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_IP_to_MAC: table is full!\n" |
3545 | hidnplayr | 573 | add esp, 8 |
574 | .give_up: |
||
3556 | hidnplayr | 575 | DEBUGF DEBUG_NETWORK_VERBOSE, "ARP_IP_to_MAC: entry has no valid mapping!\n" |
3545 | hidnplayr | 576 | mov eax, -1 |
577 | ret |
||
578 | |||
579 | .broadcast: |
||
580 | mov eax, 0x0000ffff |
||
581 | mov ebx, 0xffffffff |
||
582 | ret |
||
583 | |||
584 | |||
6011 | hidnplayr | 585 | ;-----------------------------------------------------------------; |
586 | ; ; |
||
587 | ; arp_api: Part of system function 76. ; |
||
588 | ; ; |
||
589 | ; IN: bl = subfunction number ; |
||
590 | ; bh = device number ; |
||
591 | ; ecx, edx, .. depends on subfunction ; |
||
592 | ; ; |
||
593 | ; OUT: depends on subfunction ; |
||
594 | ; ; |
||
595 | ;-----------------------------------------------------------------; |
||
3545 | hidnplayr | 596 | align 4 |
6011 | hidnplayr | 597 | arp_api: |
3545 | hidnplayr | 598 | |
599 | movzx eax, bh |
||
600 | shl eax, 2 |
||
601 | |||
602 | and ebx, 0xff |
||
603 | cmp ebx, .number |
||
604 | ja .error |
||
605 | jmp dword [.table + 4*ebx] |
||
606 | |||
607 | .table: |
||
608 | dd .packets_tx ; 0 |
||
609 | dd .packets_rx ; 1 |
||
610 | dd .entries ; 2 |
||
611 | dd .read ; 3 |
||
612 | dd .write ; 4 |
||
613 | dd .remove ; 5 |
||
614 | dd .send_announce ; 6 |
||
615 | dd .conflicts ; 7 |
||
616 | .number = ($ - .table) / 4 - 1 |
||
617 | |||
618 | .error: |
||
619 | mov eax, -1 |
||
620 | ret |
||
621 | |||
622 | .packets_tx: |
||
623 | mov eax, [ARP_PACKETS_TX + eax] |
||
624 | ret |
||
625 | |||
626 | .packets_rx: |
||
627 | mov eax, [ARP_PACKETS_RX + eax] |
||
628 | ret |
||
629 | |||
630 | .conflicts: |
||
631 | mov eax, [ARP_CONFLICTS + eax] |
||
632 | ret |
||
633 | |||
634 | .entries: |
||
3601 | hidnplayr | 635 | mov eax, [ARP_entries_num + eax] |
3545 | hidnplayr | 636 | ret |
637 | |||
638 | .read: |
||
3601 | hidnplayr | 639 | cmp ecx, [ARP_entries_num + eax] |
3545 | hidnplayr | 640 | jae .error |
3601 | hidnplayr | 641 | shr eax, 2 |
642 | imul eax, sizeof.ARP_entry*ARP_TABLE_SIZE |
||
643 | add eax, ARP_table |
||
3545 | hidnplayr | 644 | ; edi = pointer to buffer |
645 | ; ecx = # entry |
||
646 | imul ecx, sizeof.ARP_entry |
||
3601 | hidnplayr | 647 | lea esi, [eax + ecx] |
3545 | hidnplayr | 648 | mov ecx, sizeof.ARP_entry/2 |
3711 | clevermous | 649 | rep movsw |
3545 | hidnplayr | 650 | |
651 | xor eax, eax |
||
652 | ret |
||
653 | |||
654 | .write: |
||
655 | ; esi = pointer to buffer |
||
3601 | hidnplayr | 656 | mov edi, eax |
6011 | hidnplayr | 657 | call arp_add_entry ; out: eax = entry number, -1 on error |
3545 | hidnplayr | 658 | ret |
659 | |||
660 | .remove: |
||
661 | ; ecx = # entry |
||
3601 | hidnplayr | 662 | cmp ecx, [ARP_entries_num + eax] |
3545 | hidnplayr | 663 | jae .error |
664 | imul ecx, sizeof.ARP_entry |
||
665 | lea esi, [ARP_table + ecx] |
||
3601 | hidnplayr | 666 | mov edi, eax |
667 | shr edi, 2 |
||
6011 | hidnplayr | 668 | call arp_del_entry |
3545 | hidnplayr | 669 | ret |
670 | |||
671 | .send_announce: |
||
3601 | hidnplayr | 672 | mov ebx, [NET_DRV_LIST + eax] |
3545 | hidnplayr | 673 | mov eax, [IP_LIST + eax] |
6011 | hidnplayr | 674 | call arp_output_request ; now send a gratuitous ARP |
3545 | hidnplayr | 675 | ret |
676 |