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1196 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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2888 | hidnplayr | 3 | ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;; |
1196 | 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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1529 | hidnplayr | 15 | ;; Version 2, June- 1991 ;; |
1196 | hidnplayr | 16 | ;; ;; |
17 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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1159 | hidnplayr | 18 | |
1206 | hidnplayr | 19 | $Revision: 2924 $ |
1159 | hidnplayr | 20 | |
2614 | hidnplayr | 21 | ARP_NO_ENTRY = 0 |
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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1159 | hidnplayr | 25 | |
2614 | hidnplayr | 26 | ARP_REQUEST_TTL = 31 ; 20 s |
27 | ARP_ENTRY_TTL = 937 ; 600 s |
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28 | ARP_STATIC_ENTRY = -1 |
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1159 | hidnplayr | 29 | |
2614 | hidnplayr | 30 | ARP_REQ_OPCODE = 0x0100 ; request |
31 | ARP_REP_OPCODE = 0x0200 ; reply |
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1196 | hidnplayr | 32 | |
2614 | hidnplayr | 33 | ARP_TABLE_SIZE = 20 ; Size of table |
1159 | hidnplayr | 34 | |
2305 | hidnplayr | 35 | struct ARP_entry |
36 | |||
2311 | 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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2305 | hidnplayr | 41 | |
1159 | hidnplayr | 42 | ends |
43 | |||
2305 | hidnplayr | 44 | struct ARP_header |
45 | |||
2311 | 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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2305 | hidnplayr | 55 | |
1159 | hidnplayr | 56 | ends |
57 | |||
58 | align 4 |
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59 | uglobal |
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60 | |||
2311 | hidnplayr | 61 | NumARP dd ? |
1258 | hidnplayr | 62 | |
2924 | hidnplayr | 63 | ARP_table rb ARP_TABLE_SIZE * sizeof.ARP_entry ; TODO: separate ARP table and stats per interface |
1159 | hidnplayr | 64 | |
2311 | hidnplayr | 65 | ARP_PACKETS_TX rd MAX_NET_DEVICES |
66 | ARP_PACKETS_RX rd MAX_NET_DEVICES |
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1159 | hidnplayr | 67 | |
68 | |||
69 | endg |
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70 | |||
71 | |||
72 | |||
1196 | hidnplayr | 73 | ;----------------------------------------------------------------- |
74 | ; |
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75 | ; ARP_init |
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76 | ; |
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77 | ; This function resets all ARP variables |
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78 | ; |
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79 | ;----------------------------------------------------------------- |
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1529 | hidnplayr | 80 | macro ARP_init { |
1159 | hidnplayr | 81 | |
2311 | hidnplayr | 82 | xor eax, eax |
83 | mov [NumARP], eax |
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1159 | hidnplayr | 84 | |
2311 | hidnplayr | 85 | mov edi, ARP_PACKETS_TX |
86 | mov ecx, 2*MAX_NET_DEVICES |
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87 | rep stosd |
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1159 | hidnplayr | 88 | |
1529 | hidnplayr | 89 | } |
1159 | hidnplayr | 90 | |
1529 | hidnplayr | 91 | ;--------------------------------------------------------------------------- |
1159 | hidnplayr | 92 | ; |
1529 | hidnplayr | 93 | ; ARP_decrease_entry_ttls |
1159 | hidnplayr | 94 | ; |
1529 | hidnplayr | 95 | ;--------------------------------------------------------------------------- |
1159 | hidnplayr | 96 | |
1529 | hidnplayr | 97 | macro ARP_decrease_entry_ttls { |
1159 | hidnplayr | 98 | |
2311 | hidnplayr | 99 | local .loop |
100 | local .exit |
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1159 | hidnplayr | 101 | |
1529 | hidnplayr | 102 | ; The TTL field is decremented every second, and is deleted when it reaches 0. |
103 | ; It is refreshed every time a packet is received. |
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104 | ; If the TTL field is 0xFFFF it is a static entry and is never deleted. |
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105 | ; The status field can be the following values: |
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106 | ; 0x0000 entry not used |
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107 | ; 0x0001 entry holds a valid mapping |
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108 | ; 0x0002 entry contains an IP address, awaiting ARP response |
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109 | ; 0x0003 No response received to ARP request. |
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110 | ; The last status value is provided to allow the network layer to delete |
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111 | ; a packet that is queued awaiting an ARP response |
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1159 | hidnplayr | 112 | |
2311 | hidnplayr | 113 | mov ecx, [NumARP] |
114 | test ecx, ecx |
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115 | jz .exit |
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1206 | hidnplayr | 116 | |
2311 | hidnplayr | 117 | mov esi, ARP_table |
1529 | hidnplayr | 118 | .loop: |
2311 | hidnplayr | 119 | cmp [esi + ARP_entry.TTL], ARP_STATIC_ENTRY |
120 | je .next |
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1206 | hidnplayr | 121 | |
2311 | hidnplayr | 122 | dec [esi + ARP_entry.TTL] |
123 | jz .time_out |
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1159 | hidnplayr | 124 | |
1529 | hidnplayr | 125 | .next: |
2311 | hidnplayr | 126 | add esi, sizeof.ARP_entry |
127 | dec ecx |
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128 | jnz .loop |
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129 | jmp .exit |
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1159 | hidnplayr | 130 | |
1529 | hidnplayr | 131 | .time_out: |
2311 | hidnplayr | 132 | cmp [esi + ARP_entry.Status], ARP_AWAITING_RESPONSE |
133 | je .response_timeout |
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1159 | hidnplayr | 134 | |
2311 | hidnplayr | 135 | push esi ecx |
136 | call ARP_del_entry |
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137 | pop ecx esi |
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1159 | hidnplayr | 138 | |
2311 | hidnplayr | 139 | jmp .next |
1159 | hidnplayr | 140 | |
1529 | hidnplayr | 141 | .response_timeout: |
2311 | hidnplayr | 142 | mov [esi + ARP_entry.Status], ARP_RESPONSE_TIMEOUT |
143 | mov [esi + ARP_entry.TTL], 10 |
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1159 | hidnplayr | 144 | |
2311 | hidnplayr | 145 | jmp .next |
1258 | hidnplayr | 146 | |
1529 | hidnplayr | 147 | .exit: |
1258 | hidnplayr | 148 | |
1529 | hidnplayr | 149 | } |
1159 | hidnplayr | 150 | |
1258 | hidnplayr | 151 | |
1529 | hidnplayr | 152 | ;----------------------------------------------------------------- |
153 | ; |
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154 | ; ARP_input |
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155 | ; |
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156 | ; IN: Pointer to buffer in [esp] |
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157 | ; size of buffer in [esp+4] |
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158 | ; packet size (without ethernet header) in ecx |
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2629 | hidnplayr | 159 | ; packet ptr in edx |
1529 | hidnplayr | 160 | ; OUT: / |
161 | ; |
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162 | ;----------------------------------------------------------------- |
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163 | align 4 |
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164 | ARP_input: |
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1258 | hidnplayr | 165 | |
2311 | hidnplayr | 166 | cmp ecx, sizeof.ARP_header |
167 | jb .exit |
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1258 | hidnplayr | 168 | |
1529 | hidnplayr | 169 | ;--------------------- |
170 | ; Handle Reply packets |
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1258 | hidnplayr | 171 | |
2311 | hidnplayr | 172 | cmp [edx + ARP_header.Opcode], ARP_REP_OPCODE |
173 | jne .maybe_request |
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1159 | hidnplayr | 174 | |
2891 | hidnplayr | 175 | DEBUGF 1,"ARP_input: got reply packet from %u.%u.%u.%u\n",\ |
176 | [edx + ARP_header.SenderIP]:1, [edx + ARP_header.SenderIP + 1]:1,\ |
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177 | [edx + ARP_header.SenderIP + 2]:1, [edx + ARP_header.SenderIP + 3]:1 |
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1159 | hidnplayr | 178 | |
2311 | hidnplayr | 179 | mov ecx, [NumARP] |
180 | test ecx, ecx |
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181 | jz .exit |
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1159 | hidnplayr | 182 | |
2311 | hidnplayr | 183 | mov eax, [edx + ARP_header.SenderIP] |
184 | mov esi, ARP_table |
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1196 | hidnplayr | 185 | |
1529 | hidnplayr | 186 | .loop: |
2311 | hidnplayr | 187 | cmp [esi + ARP_entry.IP], eax |
188 | je .gotit |
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189 | add esi, sizeof.ARP_entry |
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190 | dec ecx |
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191 | jnz .loop |
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1258 | hidnplayr | 192 | |
2311 | hidnplayr | 193 | jmp .exit |
1159 | hidnplayr | 194 | |
1529 | hidnplayr | 195 | .gotit: |
2891 | hidnplayr | 196 | DEBUGF 1,"ARP_input: found matching entry\n" |
1159 | hidnplayr | 197 | |
2311 | hidnplayr | 198 | cmp [esi + ARP_entry.TTL], ARP_STATIC_ENTRY ; if it is a static entry, dont touch it |
199 | je .exit |
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1159 | hidnplayr | 200 | |
2891 | hidnplayr | 201 | DEBUGF 1,"ARP_input: updating entry\n" |
1159 | hidnplayr | 202 | |
2311 | hidnplayr | 203 | mov [esi + ARP_entry.Status], ARP_VALID_MAPPING |
204 | mov [esi + ARP_entry.TTL], ARP_ENTRY_TTL |
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1529 | hidnplayr | 205 | |
2311 | hidnplayr | 206 | mov eax, dword [edx + ARP_header.SenderMAC] |
2891 | hidnplayr | 207 | mov dword [esi + ARP_entry.MAC], eax |
2629 | hidnplayr | 208 | mov cx, word [edx + ARP_header.SenderMAC + 4] |
2891 | hidnplayr | 209 | mov word [esi + ARP_entry.MAC + 4], cx |
1529 | hidnplayr | 210 | |
2311 | hidnplayr | 211 | jmp .exit |
1529 | hidnplayr | 212 | |
213 | |||
214 | ;----------------------- |
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215 | ; Handle Request packets |
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216 | |||
217 | .maybe_request: |
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2311 | hidnplayr | 218 | cmp [edx + ARP_header.Opcode], ARP_REQ_OPCODE |
219 | jne .exit |
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1529 | hidnplayr | 220 | |
2311 | hidnplayr | 221 | call NET_ptr_to_num |
222 | cmp edi, -1 |
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223 | jz .exit |
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2891 | hidnplayr | 224 | DEBUGF 1,"ARP_input: got request packet through device: %u\n", edi |
225 | inc [ARP_PACKETS_RX + 4*edi] |
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1159 | hidnplayr | 226 | |
2891 | hidnplayr | 227 | mov eax, [IP_LIST + 4*edi] |
2311 | hidnplayr | 228 | cmp eax, [edx + ARP_header.TargetIP] ; Is it looking for my IP address? |
2629 | hidnplayr | 229 | jne .exit |
1159 | hidnplayr | 230 | |
2311 | hidnplayr | 231 | push eax |
232 | push edi |
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1206 | hidnplayr | 233 | |
1529 | hidnplayr | 234 | ; OK, it is a request for one of our MAC addresses. |
235 | ; Build the frame and send it. We can reuse the buffer. (faster then using ARP_create_packet) |
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236 | |||
2311 | hidnplayr | 237 | lea esi, [edx + ARP_header.SenderMAC] |
238 | lea edi, [edx + ARP_header.TargetMAC] |
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239 | movsd ; Move Sender Mac to Dest MAC |
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240 | movsw ; |
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241 | movsd ; Move sender IP to Dest IP |
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1529 | hidnplayr | 242 | |
2311 | hidnplayr | 243 | pop esi |
244 | mov esi, [NET_DRV_LIST + 4*esi] |
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245 | lea esi, [esi + ETH_DEVICE.mac] |
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246 | lea edi, [edx + ARP_header.SenderMAC] |
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247 | movsd ; Copy MAC address from in MAC_LIST |
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248 | movsw ; |
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249 | pop eax |
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250 | stosd ; Write our IP |
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1159 | hidnplayr | 251 | |
2311 | hidnplayr | 252 | mov [edx + ARP_header.Opcode], ARP_REP_OPCODE |
1159 | hidnplayr | 253 | |
1529 | hidnplayr | 254 | ; Now, Fill in ETHERNET header |
255 | |||
2311 | hidnplayr | 256 | mov edi, [esp] |
257 | lea esi, [edx + ARP_header.TargetMAC] |
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258 | movsd |
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259 | movsw |
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260 | lea esi, [edx + ARP_header.SenderMAC] |
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261 | movsd |
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262 | movsw |
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2629 | hidnplayr | 263 | ; mov ax , ETHER_ARP ; It's already there, I'm sure of it! |
1529 | hidnplayr | 264 | ; stosw |
265 | |||
2891 | hidnplayr | 266 | DEBUGF 1,"ARP_input: Sending reply\n" |
1529 | hidnplayr | 267 | |
2311 | hidnplayr | 268 | call [ebx + NET_DEVICE.transmit] |
269 | ret |
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1159 | hidnplayr | 270 | |
2629 | hidnplayr | 271 | .exit: |
2311 | hidnplayr | 272 | call kernel_free |
273 | add esp, 4 ; pop (balance stack) |
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1529 | hidnplayr | 274 | |
2891 | hidnplayr | 275 | DEBUGF 1,"ARP_input: exiting\n" |
2311 | hidnplayr | 276 | ret |
1159 | hidnplayr | 277 | |
278 | |||
1185 | hidnplayr | 279 | ;--------------------------------------------------------------------------- |
280 | ; |
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1529 | hidnplayr | 281 | ; ARP_output_request |
1185 | hidnplayr | 282 | ; |
1529 | hidnplayr | 283 | ; IN: ip in eax |
2877 | hidnplayr | 284 | ; device in edi |
1185 | hidnplayr | 285 | ; OUT: / |
286 | ; |
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287 | ;--------------------------------------------------------------------------- |
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288 | align 4 |
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1529 | hidnplayr | 289 | ARP_output_request: |
1185 | hidnplayr | 290 | |
2311 | hidnplayr | 291 | push eax ; DestIP |
2891 | hidnplayr | 292 | pushd [IP_LIST + edi] ; SenderIP |
1185 | hidnplayr | 293 | |
2891 | hidnplayr | 294 | DEBUGF 1,"ARP_output_request: ip=%u.%u.%u.%u\n",\ |
295 | [esp]:1, [esp + 1]:1, [esp + 2]:1, [esp + 3]:1 |
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1185 | hidnplayr | 296 | |
2891 | hidnplayr | 297 | mov ebx, [NET_DRV_LIST + edi] ; device ptr |
298 | |||
2311 | hidnplayr | 299 | lea eax, [ebx + ETH_DEVICE.mac] ; local device mac |
300 | mov edx, ETH_BROADCAST ; broadcast mac |
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301 | mov ecx, sizeof.ARP_header |
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302 | mov di, ETHER_ARP |
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303 | call ETH_output |
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304 | jz .exit |
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1185 | hidnplayr | 305 | |
2311 | hidnplayr | 306 | mov ecx, eax |
1185 | hidnplayr | 307 | |
2311 | hidnplayr | 308 | mov [edi + ARP_header.HardwareType], 0x0100 ; Ethernet |
309 | mov [edi + ARP_header.ProtocolType], 0x0008 ; IP |
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310 | mov [edi + ARP_header.HardwareSize], 6 ; MAC-addr length |
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311 | mov [edi + ARP_header.ProtocolSize], 4 ; IP-addr length |
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312 | mov [edi + ARP_header.Opcode], ARP_REQ_OPCODE ; Request |
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1185 | hidnplayr | 313 | |
2311 | hidnplayr | 314 | add edi, ARP_header.SenderMAC |
1185 | hidnplayr | 315 | |
2311 | hidnplayr | 316 | lea esi, [ebx + ETH_DEVICE.mac] ; SenderMac |
317 | movsw ; |
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318 | movsd ; |
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319 | pop eax ; SenderIP |
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320 | stosd ; |
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1185 | hidnplayr | 321 | |
2311 | hidnplayr | 322 | mov eax, -1 ; DestMac |
323 | stosd ; |
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324 | stosw ; |
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325 | pop eax ; DestIP |
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326 | stosd ; |
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1185 | hidnplayr | 327 | |
2891 | hidnplayr | 328 | DEBUGF 1,"ARP_output_request: device=%x\n", ebx |
1185 | hidnplayr | 329 | |
2311 | hidnplayr | 330 | push edx ecx |
331 | call [ebx + NET_DEVICE.transmit] |
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332 | ret |
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1185 | hidnplayr | 333 | |
1529 | hidnplayr | 334 | .exit: |
2891 | hidnplayr | 335 | add esp, 4 + 4 |
336 | DEBUGF 1,"ARP_output_request: failed\n" |
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2311 | hidnplayr | 337 | sub eax, eax |
338 | ret |
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1185 | hidnplayr | 339 | |
340 | |||
1257 | hidnplayr | 341 | ;----------------------------------------------------------------- |
1196 | hidnplayr | 342 | ; |
343 | ; ARP_add_entry (or update) |
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344 | ; |
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1529 | hidnplayr | 345 | ; IN: esi = ptr to entry (can easily be made on the stack) |
1196 | hidnplayr | 346 | ; OUT: eax = entry #, -1 on error |
347 | ; |
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1257 | hidnplayr | 348 | ;----------------------------------------------------------------- ; TODO: use a mutex |
1196 | hidnplayr | 349 | align 4 |
350 | ARP_add_entry: |
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351 | |||
2891 | hidnplayr | 352 | DEBUGF 1,"ARP_add_entry: " |
1206 | hidnplayr | 353 | |
2311 | hidnplayr | 354 | mov ecx, [NumARP] |
355 | test ecx, ecx ; first entry? |
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356 | jz .add |
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357 | cmp ecx, ARP_TABLE_SIZE ; list full ? |
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358 | jae .error |
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1196 | hidnplayr | 359 | |
2311 | hidnplayr | 360 | mov eax, dword [esi + ARP_entry.MAC] |
361 | mov bx , word [esi + ARP_entry.MAC + 4] |
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362 | mov edi, ARP_table |
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1196 | hidnplayr | 363 | |
1529 | hidnplayr | 364 | .loop: |
2311 | hidnplayr | 365 | cmp dword [edi + ARP_entry.MAC], eax ; Check for duplicate MAC's |
366 | jne .maybe_next ; |
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367 | cmp word [edi + ARP_entry.MAC + 4], bx ; |
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368 | jne .maybe_next ; |
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1196 | hidnplayr | 369 | |
2311 | hidnplayr | 370 | cmp [edi + ARP_entry.TTL], ARP_STATIC_ENTRY |
371 | jne .notstatic |
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372 | cmp [esi + ARP_entry.TTL], ARP_STATIC_ENTRY |
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373 | jne .error |
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1529 | hidnplayr | 374 | .notstatic: |
1196 | hidnplayr | 375 | |
2311 | hidnplayr | 376 | neg ecx |
377 | add ecx, [NumARP] |
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378 | jmp .add |
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1196 | hidnplayr | 379 | |
1529 | hidnplayr | 380 | .maybe_next: |
2311 | hidnplayr | 381 | add esi, sizeof.ARP_entry |
382 | loop .loop |
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1196 | hidnplayr | 383 | |
2311 | hidnplayr | 384 | mov ecx, [NumARP] |
1529 | hidnplayr | 385 | .add: |
2311 | hidnplayr | 386 | push ecx |
387 | imul ecx, sizeof.ARP_entry |
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388 | lea edi, [ecx + ARP_table] |
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389 | mov ecx, sizeof.ARP_entry/2 |
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390 | rep movsw |
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1196 | hidnplayr | 391 | |
2311 | hidnplayr | 392 | lea esi, [edi - sizeof.ARP_entry] |
393 | inc [NumARP] |
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394 | pop eax |
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2891 | hidnplayr | 395 | DEBUGF 1,"entry=%u\n", eax |
1529 | hidnplayr | 396 | |
2311 | hidnplayr | 397 | ret |
1196 | hidnplayr | 398 | |
1529 | hidnplayr | 399 | .error: |
2891 | hidnplayr | 400 | DEBUGF 1,"failed\n" |
2311 | hidnplayr | 401 | mov eax, -1 |
402 | ret |
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1196 | hidnplayr | 403 | |
404 | |||
1257 | hidnplayr | 405 | ;----------------------------------------------------------------- |
1185 | hidnplayr | 406 | ; |
407 | ; ARP_del_entry |
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408 | ; |
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1529 | hidnplayr | 409 | ; IN: esi = ptr to arp entry |
1185 | hidnplayr | 410 | ; OUT: / |
411 | ; |
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1257 | hidnplayr | 412 | ;----------------------------------------------------------------- |
1185 | hidnplayr | 413 | align 4 |
414 | ARP_del_entry: |
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415 | |||
2891 | hidnplayr | 416 | DEBUGF 1,"ARP_del_entry: entry=%u entrys=%u\n", esi, [NumARP] |
1206 | hidnplayr | 417 | |
2311 | hidnplayr | 418 | mov ecx, ARP_table + (ARP_TABLE_SIZE - 1) * sizeof.ARP_entry |
419 | sub ecx, esi |
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420 | shr ecx, 1 |
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1185 | hidnplayr | 421 | |
2311 | hidnplayr | 422 | mov edi, esi |
423 | lea esi, [edi + sizeof.ARP_entry] |
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424 | rep movsw |
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1185 | hidnplayr | 425 | |
2311 | hidnplayr | 426 | dec [NumARP] |
2891 | hidnplayr | 427 | DEBUGF 1,"ARP_del_entry: success\n" |
1529 | hidnplayr | 428 | |
2311 | hidnplayr | 429 | ret |
1185 | hidnplayr | 430 | |
431 | |||
432 | |||
433 | |||
1529 | hidnplayr | 434 | |
1257 | hidnplayr | 435 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 436 | ; |
1529 | hidnplayr | 437 | ; ARP_IP_to_MAC |
1159 | hidnplayr | 438 | ; |
1529 | hidnplayr | 439 | ; This function translates an IP address to a MAC address |
1159 | hidnplayr | 440 | ; |
1529 | hidnplayr | 441 | ; IN: eax = IPv4 address |
2877 | hidnplayr | 442 | ; edi = device number |
1529 | hidnplayr | 443 | ; OUT: eax = -1 on error, -2 means request send |
444 | ; else, ax = first two bytes of mac (high 16 bits of eax will be 0) |
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445 | ; ebx = last four bytes of mac |
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2877 | hidnplayr | 446 | ; edi = unchanged |
1159 | hidnplayr | 447 | ; |
1257 | hidnplayr | 448 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 449 | align 4 |
1529 | hidnplayr | 450 | ARP_IP_to_MAC: |
1159 | hidnplayr | 451 | |
2555 | hidnplayr | 452 | DEBUGF 1,"ARP_IP_to_MAC: %u.%u", al, ah |
453 | rol eax, 16 |
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454 | DEBUGF 1,".%u.%u\n", al, ah |
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455 | rol eax, 16 |
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1159 | hidnplayr | 456 | |
2311 | hidnplayr | 457 | cmp eax, 0xffffffff |
458 | je .broadcast |
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1159 | hidnplayr | 459 | |
1529 | hidnplayr | 460 | ;-------------------------------- |
461 | ; Try to find the IP in ARP_table |
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1206 | hidnplayr | 462 | |
2311 | hidnplayr | 463 | mov ecx, [NumARP] |
464 | test ecx, ecx |
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465 | jz .not_in_list |
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466 | mov esi, ARP_table + ARP_entry.IP |
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1529 | hidnplayr | 467 | .scan_loop: |
2311 | hidnplayr | 468 | cmp [esi], eax |
469 | je .found_it |
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470 | add esi, sizeof.ARP_entry |
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471 | loop .scan_loop |
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1206 | hidnplayr | 472 | |
1529 | hidnplayr | 473 | .not_in_list: |
2888 | hidnplayr | 474 | DEBUGF 1,"ARP_IP_to_MAC: preparing for ARP request\n" |
1196 | hidnplayr | 475 | |
1529 | hidnplayr | 476 | ;-------------------- |
477 | ; Send an ARP request |
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1196 | hidnplayr | 478 | |
2877 | hidnplayr | 479 | push eax edi ; save IP for ARP_output_request |
1159 | hidnplayr | 480 | |
2629 | hidnplayr | 481 | ; Now create the ARP entry |
482 | pushw ARP_REQUEST_TTL ; TTL |
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483 | pushw ARP_AWAITING_RESPONSE ; status |
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484 | pushd 0 ; mac |
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2311 | hidnplayr | 485 | pushw 0 |
2629 | hidnplayr | 486 | pushd eax ; ip |
2311 | hidnplayr | 487 | mov esi, esp |
488 | call ARP_add_entry |
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489 | add esp, sizeof.ARP_entry |
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1159 | hidnplayr | 490 | |
2311 | hidnplayr | 491 | cmp eax, -1 |
492 | je .full |
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1159 | hidnplayr | 493 | |
2629 | hidnplayr | 494 | ; And send a request |
2877 | hidnplayr | 495 | pop edi eax |
2629 | hidnplayr | 496 | call ARP_output_request ; IP in eax |
1530 | hidnplayr | 497 | ;; TODO: check if driver could transmit packet |
498 | |||
2629 | hidnplayr | 499 | mov eax, -2 ; request send |
2311 | hidnplayr | 500 | ret |
1159 | hidnplayr | 501 | |
1529 | hidnplayr | 502 | .found_it: |
2888 | hidnplayr | 503 | DEBUGF 1,"ARP_IP_to_MAC: found IP\n" |
2629 | hidnplayr | 504 | cmp [esi + ARP_entry.Status], ARP_VALID_MAPPING |
2311 | hidnplayr | 505 | jne .invalid |
1159 | hidnplayr | 506 | |
2311 | hidnplayr | 507 | movzx eax, word [esi + ARP_entry.MAC] |
2877 | hidnplayr | 508 | mov ebx, dword[esi + ARP_entry.MAC + 2] |
2311 | hidnplayr | 509 | ret |
1206 | hidnplayr | 510 | |
1529 | hidnplayr | 511 | .invalid: |
2888 | hidnplayr | 512 | DEBUGF 1,"ARP_IP_to_MAC: entry has no valid mapping!\n" |
2311 | hidnplayr | 513 | mov eax, -1 |
514 | ret |
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1159 | hidnplayr | 515 | |
1529 | hidnplayr | 516 | .full: |
2888 | hidnplayr | 517 | DEBUGF 1,"ARP_IP_to_MAC: table is full!\n" |
2877 | hidnplayr | 518 | add esp, 8 |
2311 | hidnplayr | 519 | mov eax, -1 |
520 | ret |
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1159 | hidnplayr | 521 | |
1529 | hidnplayr | 522 | .broadcast: |
2311 | hidnplayr | 523 | mov eax, 0x0000ffff |
524 | mov ebx, 0xffffffff |
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525 | ret |
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1159 | hidnplayr | 526 | |
527 | |||
1257 | hidnplayr | 528 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 529 | ; |
530 | ; ARP_API |
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531 | ; |
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532 | ; This function is called by system function 75 |
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533 | ; |
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534 | ; IN: subfunction number in bl |
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535 | ; device number in bh |
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536 | ; ecx, edx, .. depends on subfunction |
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537 | ; |
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1257 | hidnplayr | 538 | ; OUT: ? |
1159 | hidnplayr | 539 | ; |
1257 | hidnplayr | 540 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 541 | align 4 |
2614 | hidnplayr | 542 | ARP_api: |
1159 | hidnplayr | 543 | |
2311 | hidnplayr | 544 | movzx eax, bh |
545 | shl eax, 2 |
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1159 | hidnplayr | 546 | |
2614 | hidnplayr | 547 | and ebx, 0xff |
548 | cmp ebx, .number |
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549 | ja .error |
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550 | jmp dword [.table + 4*ebx] |
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1159 | hidnplayr | 551 | |
2614 | hidnplayr | 552 | .table: |
553 | dd .packets_tx ; 0 |
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554 | dd .packets_rx ; 1 |
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555 | dd .entries ; 2 |
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556 | dd .read ; 3 |
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557 | dd .write ; 4 |
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558 | dd .remove ; 5 |
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559 | .number = ($ - .table) / 4 - 1 |
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560 | |||
561 | .error: |
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2311 | hidnplayr | 562 | mov eax, -1 |
563 | ret |
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1159 | hidnplayr | 564 | |
2614 | hidnplayr | 565 | .packets_tx: |
566 | mov eax, [ARP_PACKETS_TX + eax] |
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2311 | hidnplayr | 567 | ret |
1159 | hidnplayr | 568 | |
2614 | hidnplayr | 569 | .packets_rx: |
570 | mov eax, [ARP_PACKETS_RX + eax] |
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2311 | hidnplayr | 571 | ret |
1159 | hidnplayr | 572 | |
2614 | hidnplayr | 573 | .entries: |
2311 | hidnplayr | 574 | mov eax, [NumARP] |
575 | ret |
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1159 | hidnplayr | 576 | |
2614 | hidnplayr | 577 | .read: |
2311 | hidnplayr | 578 | cmp ecx, [NumARP] |
579 | jae .error |
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580 | ; edi = pointer to buffer |
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581 | ; ecx = # entry |
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582 | imul ecx, sizeof.ARP_entry |
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583 | add ecx, ARP_table |
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584 | mov esi, ecx |
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585 | mov ecx, sizeof.ARP_entry/2 |
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586 | rep movsw |
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1200 | hidnplayr | 587 | |
2311 | hidnplayr | 588 | xor eax, eax |
589 | ret |
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1159 | hidnplayr | 590 | |
2614 | hidnplayr | 591 | .write: |
2311 | hidnplayr | 592 | ; esi = pointer to buffer |
593 | call ARP_add_entry ;out: eax = entry number, -1 on error |
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594 | ret |
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1159 | hidnplayr | 595 | |
2614 | hidnplayr | 596 | .remove: |
2311 | hidnplayr | 597 | ; ecx = # entry |
598 | cmp ecx, [NumARP] |
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599 | jae .error |
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600 | imul ecx, sizeof.ARP_entry |
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601 | lea esi, [ARP_table + ecx] |
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602 | call ARP_del_entry |
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603 | ret |
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1159 | hidnplayr | 604 |