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1196 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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1514 | hidnplayr | 3 | ;; Copyright (C) KolibriOS team 2004-2010. 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: 2629 $ |
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 | |
2311 | hidnplayr | 63 | ARP_table rb ARP_TABLE_SIZE * sizeof.ARP_entry |
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 | |
2555 | hidnplayr | 166 | DEBUGF 1,"ARP_input - start\n" |
2311 | hidnplayr | 167 | cmp ecx, sizeof.ARP_header |
168 | jb .exit |
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1258 | hidnplayr | 169 | |
1529 | hidnplayr | 170 | ;--------------------- |
171 | ; Handle Reply packets |
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1258 | hidnplayr | 172 | |
2311 | hidnplayr | 173 | cmp [edx + ARP_header.Opcode], ARP_REP_OPCODE |
174 | jne .maybe_request |
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1159 | hidnplayr | 175 | |
2555 | hidnplayr | 176 | DEBUGF 1,"ARP_input - it's a reply packet from %u.%u.%u.%u\n",\ |
2629 | hidnplayr | 177 | [edx + ARP_header.SenderIP]:1, [edx + ARP_header.SenderIP+1]:1,\ |
178 | [edx + ARP_header.SenderIP+2]:1, [edx + ARP_header.SenderIP+3]:1 |
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1159 | hidnplayr | 179 | |
2311 | hidnplayr | 180 | mov ecx, [NumARP] |
181 | test ecx, ecx |
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182 | jz .exit |
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1159 | hidnplayr | 183 | |
2311 | hidnplayr | 184 | mov eax, [edx + ARP_header.SenderIP] |
185 | mov esi, ARP_table |
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1196 | hidnplayr | 186 | |
1529 | hidnplayr | 187 | .loop: |
2311 | hidnplayr | 188 | cmp [esi + ARP_entry.IP], eax |
189 | je .gotit |
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190 | add esi, sizeof.ARP_entry |
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191 | dec ecx |
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192 | jnz .loop |
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1258 | hidnplayr | 193 | |
2311 | hidnplayr | 194 | jmp .exit |
1159 | hidnplayr | 195 | |
1529 | hidnplayr | 196 | .gotit: |
2555 | hidnplayr | 197 | DEBUGF 1,"ARP_input - found matching entry\n" |
1159 | hidnplayr | 198 | |
2311 | hidnplayr | 199 | cmp [esi + ARP_entry.TTL], ARP_STATIC_ENTRY ; if it is a static entry, dont touch it |
200 | je .exit |
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1159 | hidnplayr | 201 | |
2555 | hidnplayr | 202 | DEBUGF 1,"ARP_input - updating entry\n" |
1159 | hidnplayr | 203 | |
2311 | hidnplayr | 204 | mov [esi + ARP_entry.Status], ARP_VALID_MAPPING |
205 | mov [esi + ARP_entry.TTL], ARP_ENTRY_TTL |
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1529 | hidnplayr | 206 | |
2311 | hidnplayr | 207 | mov eax, dword [edx + ARP_header.SenderMAC] |
208 | mov dword [esi+ARP_entry.MAC], eax |
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2629 | hidnplayr | 209 | mov cx, word [edx + ARP_header.SenderMAC + 4] |
210 | mov word [esi+ARP_entry.MAC+4], cx |
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1529 | hidnplayr | 211 | |
2311 | hidnplayr | 212 | jmp .exit |
1529 | hidnplayr | 213 | |
214 | |||
215 | ;----------------------- |
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216 | ; Handle Request packets |
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217 | |||
218 | .maybe_request: |
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2311 | hidnplayr | 219 | cmp [edx + ARP_header.Opcode], ARP_REQ_OPCODE |
220 | jne .exit |
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1529 | hidnplayr | 221 | |
2311 | hidnplayr | 222 | call NET_ptr_to_num |
223 | cmp edi, -1 |
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224 | jz .exit |
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225 | DEBUGF 1,"ARP Request packet through device: %u\n", edi |
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226 | inc [ARP_PACKETS_RX+4*edi] |
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1159 | hidnplayr | 227 | |
2311 | hidnplayr | 228 | mov eax, [IP_LIST+4*edi] |
229 | cmp eax, [edx + ARP_header.TargetIP] ; Is it looking for my IP address? |
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2629 | hidnplayr | 230 | jne .exit |
1159 | hidnplayr | 231 | |
2311 | hidnplayr | 232 | push eax |
233 | push edi |
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1206 | hidnplayr | 234 | |
1529 | hidnplayr | 235 | ; OK, it is a request for one of our MAC addresses. |
236 | ; Build the frame and send it. We can reuse the buffer. (faster then using ARP_create_packet) |
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237 | |||
2311 | hidnplayr | 238 | lea esi, [edx + ARP_header.SenderMAC] |
239 | lea edi, [edx + ARP_header.TargetMAC] |
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240 | movsd ; Move Sender Mac to Dest MAC |
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241 | movsw ; |
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242 | movsd ; Move sender IP to Dest IP |
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1529 | hidnplayr | 243 | |
2311 | hidnplayr | 244 | pop esi |
245 | mov esi, [NET_DRV_LIST + 4*esi] |
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246 | lea esi, [esi + ETH_DEVICE.mac] |
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247 | lea edi, [edx + ARP_header.SenderMAC] |
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248 | movsd ; Copy MAC address from in MAC_LIST |
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249 | movsw ; |
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250 | pop eax |
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251 | stosd ; Write our IP |
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1159 | hidnplayr | 252 | |
2311 | hidnplayr | 253 | mov [edx + ARP_header.Opcode], ARP_REP_OPCODE |
1159 | hidnplayr | 254 | |
1529 | hidnplayr | 255 | ; Now, Fill in ETHERNET header |
256 | |||
2311 | hidnplayr | 257 | mov edi, [esp] |
258 | lea esi, [edx + ARP_header.TargetMAC] |
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259 | movsd |
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260 | movsw |
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261 | lea esi, [edx + ARP_header.SenderMAC] |
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262 | movsd |
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263 | movsw |
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2629 | hidnplayr | 264 | ; mov ax , ETHER_ARP ; It's already there, I'm sure of it! |
1529 | hidnplayr | 265 | ; stosw |
266 | |||
2555 | hidnplayr | 267 | DEBUGF 1,"ARP_input - Sending reply \n" |
1529 | hidnplayr | 268 | |
2311 | hidnplayr | 269 | call [ebx + NET_DEVICE.transmit] |
270 | ret |
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1159 | hidnplayr | 271 | |
2629 | hidnplayr | 272 | .exit: |
2311 | hidnplayr | 273 | call kernel_free |
274 | add esp, 4 ; pop (balance stack) |
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1529 | hidnplayr | 275 | |
2555 | hidnplayr | 276 | DEBUGF 1,"ARP_input - exiting\n" |
2311 | hidnplayr | 277 | ret |
1159 | hidnplayr | 278 | |
279 | |||
1185 | hidnplayr | 280 | ;--------------------------------------------------------------------------- |
281 | ; |
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1529 | hidnplayr | 282 | ; ARP_output_request |
1185 | hidnplayr | 283 | ; |
1529 | hidnplayr | 284 | ; IN: ip in eax |
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 | DEBUGF 1,"Create ARP Packet\n" |
1185 | hidnplayr | 292 | |
2311 | hidnplayr | 293 | call IPv4_dest_to_dev |
294 | push eax ; DestIP |
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295 | pushd [IP_LIST+edi] ; SenderIP |
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1185 | hidnplayr | 296 | |
2311 | hidnplayr | 297 | mov ebx, [NET_DRV_LIST+edi] ; device ptr |
1185 | hidnplayr | 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 | |
2311 | hidnplayr | 328 | DEBUGF 1,"ARP Packet for device %x created successfully\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: |
2311 | hidnplayr | 335 | add esp, 4+4 |
336 | DEBUGF 1,"Create ARP Packet - failed\n" |
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337 | sub eax, eax |
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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 | |||
2311 | 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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395 | DEBUGF 1,"New entry created: %u\n", eax |
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1529 | hidnplayr | 396 | |
397 | .exit: |
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2311 | hidnplayr | 398 | DEBUGF 1,"Exiting\n" |
399 | ret |
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1196 | hidnplayr | 400 | |
1529 | hidnplayr | 401 | .error: |
2311 | hidnplayr | 402 | DEBUGF 1,"error! \n" |
403 | mov eax, -1 |
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404 | ret |
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1196 | hidnplayr | 405 | |
406 | |||
1257 | hidnplayr | 407 | ;----------------------------------------------------------------- |
1185 | hidnplayr | 408 | ; |
409 | ; ARP_del_entry |
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410 | ; |
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1529 | hidnplayr | 411 | ; IN: esi = ptr to arp entry |
1185 | hidnplayr | 412 | ; OUT: / |
413 | ; |
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1257 | hidnplayr | 414 | ;----------------------------------------------------------------- |
1185 | hidnplayr | 415 | align 4 |
416 | ARP_del_entry: |
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417 | |||
2311 | hidnplayr | 418 | DEBUGF 1,"ARP del entry %x, total entrys: %u\n", esi, [NumARP] |
1206 | hidnplayr | 419 | |
2311 | hidnplayr | 420 | mov ecx, ARP_table + (ARP_TABLE_SIZE - 1) * sizeof.ARP_entry |
421 | sub ecx, esi |
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422 | shr ecx, 1 |
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1185 | hidnplayr | 423 | |
2311 | hidnplayr | 424 | mov edi, esi |
425 | lea esi, [edi + sizeof.ARP_entry] |
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426 | rep movsw |
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1185 | hidnplayr | 427 | |
2311 | hidnplayr | 428 | dec [NumARP] |
429 | DEBUGF 1,"ARP entry deleted\n" |
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1529 | hidnplayr | 430 | |
2311 | hidnplayr | 431 | ret |
1185 | hidnplayr | 432 | |
433 | |||
434 | |||
435 | |||
1529 | hidnplayr | 436 | |
1257 | hidnplayr | 437 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 438 | ; |
1529 | hidnplayr | 439 | ; ARP_IP_to_MAC |
1159 | hidnplayr | 440 | ; |
1529 | hidnplayr | 441 | ; This function translates an IP address to a MAC address |
1159 | hidnplayr | 442 | ; |
1529 | hidnplayr | 443 | ; IN: eax = IPv4 address |
444 | ; OUT: eax = -1 on error, -2 means request send |
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445 | ; else, ax = first two bytes of mac (high 16 bits of eax will be 0) |
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446 | ; ebx = last four bytes of mac |
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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 | ; if ((Remote IP & subnet_mask) == (local IP & subnet_mask )) |
461 | ; destination is on same subnet |
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462 | ; else, destination is remote and must use a gateway |
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1206 | hidnplayr | 463 | |
2311 | hidnplayr | 464 | call IPv4_dest_to_dev |
465 | mov ebx, [IP_LIST + edi] |
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466 | and ebx, [SUBNET_LIST + edi] |
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1159 | hidnplayr | 467 | |
2311 | hidnplayr | 468 | mov ecx, eax |
469 | and ecx, [SUBNET_LIST + edi] |
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1196 | hidnplayr | 470 | |
2311 | hidnplayr | 471 | cmp ecx, ebx |
472 | je .local |
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1196 | hidnplayr | 473 | |
2311 | hidnplayr | 474 | mov eax, [GATEWAY_LIST + edi] |
475 | DEBUGF 1,"requested IP is not on subnet, using default gateway\n" |
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1196 | hidnplayr | 476 | |
1529 | hidnplayr | 477 | ;-------------------------------- |
478 | ; Try to find the IP in ARP_table |
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1206 | hidnplayr | 479 | |
1529 | hidnplayr | 480 | .local: |
2311 | hidnplayr | 481 | mov ecx, [NumARP] |
482 | test ecx, ecx |
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483 | jz .not_in_list |
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484 | mov esi, ARP_table + ARP_entry.IP |
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1529 | hidnplayr | 485 | .scan_loop: |
2311 | hidnplayr | 486 | cmp [esi], eax |
487 | je .found_it |
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488 | add esi, sizeof.ARP_entry |
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489 | loop .scan_loop |
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1206 | hidnplayr | 490 | |
1529 | hidnplayr | 491 | .not_in_list: |
2311 | hidnplayr | 492 | DEBUGF 1,"IP not found on list, preparing for ARP request\n" |
1196 | hidnplayr | 493 | |
1529 | hidnplayr | 494 | ;-------------------- |
495 | ; Send an ARP request |
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1196 | hidnplayr | 496 | |
2629 | hidnplayr | 497 | push eax ; save IP for ARP_output_request |
1159 | hidnplayr | 498 | |
2629 | hidnplayr | 499 | ; Now create the ARP entry |
500 | pushw ARP_REQUEST_TTL ; TTL |
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501 | pushw ARP_AWAITING_RESPONSE ; status |
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502 | pushd 0 ; mac |
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2311 | hidnplayr | 503 | pushw 0 |
2629 | hidnplayr | 504 | pushd eax ; ip |
2311 | hidnplayr | 505 | mov esi, esp |
506 | call ARP_add_entry |
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507 | add esp, sizeof.ARP_entry |
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1159 | hidnplayr | 508 | |
2311 | hidnplayr | 509 | cmp eax, -1 |
510 | je .full |
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1159 | hidnplayr | 511 | |
2629 | hidnplayr | 512 | ; And send a request |
2311 | hidnplayr | 513 | pop eax |
2629 | hidnplayr | 514 | call ARP_output_request ; IP in eax |
1530 | hidnplayr | 515 | ;; TODO: check if driver could transmit packet |
516 | |||
2629 | hidnplayr | 517 | mov eax, -2 ; request send |
2311 | hidnplayr | 518 | ret |
1159 | hidnplayr | 519 | |
1529 | hidnplayr | 520 | .found_it: |
2311 | hidnplayr | 521 | DEBUGF 1,"found IP in ARPTable\n" |
2629 | hidnplayr | 522 | cmp [esi + ARP_entry.Status], ARP_VALID_MAPPING |
2311 | hidnplayr | 523 | jne .invalid |
1159 | hidnplayr | 524 | |
2311 | hidnplayr | 525 | movzx eax, word [esi + ARP_entry.MAC] |
526 | mov ebx, dword[esi + ARP_entry.MAC+2] |
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527 | ret |
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1206 | hidnplayr | 528 | |
1529 | hidnplayr | 529 | .invalid: |
2311 | hidnplayr | 530 | mov eax, -1 |
531 | ret |
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1159 | hidnplayr | 532 | |
1529 | hidnplayr | 533 | .full: |
2311 | hidnplayr | 534 | DEBUGF 1,"ARP table is full!\n" |
535 | pop eax |
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536 | mov eax, -1 |
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537 | ret |
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1159 | hidnplayr | 538 | |
1529 | hidnplayr | 539 | .broadcast: |
2311 | hidnplayr | 540 | mov eax, 0x0000ffff |
541 | mov ebx, 0xffffffff |
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542 | ret |
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1159 | hidnplayr | 543 | |
544 | |||
1257 | hidnplayr | 545 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 546 | ; |
547 | ; ARP_API |
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548 | ; |
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549 | ; This function is called by system function 75 |
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550 | ; |
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551 | ; IN: subfunction number in bl |
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552 | ; device number in bh |
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553 | ; ecx, edx, .. depends on subfunction |
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554 | ; |
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1257 | hidnplayr | 555 | ; OUT: ? |
1159 | hidnplayr | 556 | ; |
1257 | hidnplayr | 557 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 558 | align 4 |
2614 | hidnplayr | 559 | ARP_api: |
1159 | hidnplayr | 560 | |
2311 | hidnplayr | 561 | movzx eax, bh |
562 | shl eax, 2 |
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1159 | hidnplayr | 563 | |
2614 | hidnplayr | 564 | and ebx, 0xff |
565 | cmp ebx, .number |
||
566 | ja .error |
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567 | jmp dword [.table + 4*ebx] |
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1159 | hidnplayr | 568 | |
2614 | hidnplayr | 569 | .table: |
570 | dd .packets_tx ; 0 |
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571 | dd .packets_rx ; 1 |
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572 | dd .entries ; 2 |
||
573 | dd .read ; 3 |
||
574 | dd .write ; 4 |
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575 | dd .remove ; 5 |
||
576 | .number = ($ - .table) / 4 - 1 |
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577 | |||
578 | .error: |
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2311 | hidnplayr | 579 | mov eax, -1 |
580 | ret |
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1159 | hidnplayr | 581 | |
2614 | hidnplayr | 582 | .packets_tx: |
583 | mov eax, [ARP_PACKETS_TX + eax] |
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2311 | hidnplayr | 584 | ret |
1159 | hidnplayr | 585 | |
2614 | hidnplayr | 586 | .packets_rx: |
587 | mov eax, [ARP_PACKETS_RX + eax] |
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2311 | hidnplayr | 588 | ret |
1159 | hidnplayr | 589 | |
2614 | hidnplayr | 590 | .entries: |
2311 | hidnplayr | 591 | mov eax, [NumARP] |
592 | ret |
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1159 | hidnplayr | 593 | |
2614 | hidnplayr | 594 | .read: |
2311 | hidnplayr | 595 | cmp ecx, [NumARP] |
596 | jae .error |
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597 | ; edi = pointer to buffer |
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598 | ; ecx = # entry |
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599 | imul ecx, sizeof.ARP_entry |
||
600 | add ecx, ARP_table |
||
601 | mov esi, ecx |
||
602 | mov ecx, sizeof.ARP_entry/2 |
||
603 | rep movsw |
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1200 | hidnplayr | 604 | |
2311 | hidnplayr | 605 | xor eax, eax |
606 | ret |
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1159 | hidnplayr | 607 | |
2614 | hidnplayr | 608 | .write: |
2311 | hidnplayr | 609 | ; esi = pointer to buffer |
610 | call ARP_add_entry ;out: eax = entry number, -1 on error |
||
611 | ret |
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1159 | hidnplayr | 612 | |
2614 | hidnplayr | 613 | .remove: |
2311 | hidnplayr | 614 | ; ecx = # entry |
615 | cmp ecx, [NumARP] |
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616 | jae .error |
||
617 | imul ecx, sizeof.ARP_entry |
||
618 | lea esi, [ARP_table + ecx] |
||
619 | call ARP_del_entry |
||
620 | ret |
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1159 | hidnplayr | 621 |