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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 | ;; IPv4.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: 5522 $ |
3545 | hidnplayr | 20 | |
4053 | hidnplayr | 21 | IPv4_MAX_FRAGMENTS = 64 |
4387 | hidnplayr | 22 | IPv4_MAX_ROUTES = 64 |
3545 | hidnplayr | 23 | |
4387 | hidnplayr | 24 | IPv4_ROUTE_FLAG_UP = 1 shl 0 |
25 | IPv4_ROUTE_FLAG_GATEWAY = 1 shl 1 |
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26 | IPv4_ROUTE_FLAG_HOST = 1 shl 2 |
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27 | IPv4_ROUTE_FLAG_D = 1 shl 3 ; Route was created by a redirect |
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28 | IPv4_ROUTE_FLAG_M = 1 shl 4 ; Route was modified by a redirect |
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29 | |||
3545 | hidnplayr | 30 | struct IPv4_header |
31 | |||
32 | VersionAndIHL db ? ; Version[0-3 bits] and IHL(header length)[4-7 bits] |
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33 | TypeOfService db ? ; precedence [7-5] minimize delay [4], maximize throughput [3], maximize riliability [2] minimize momentary cost [1] and zero [0] |
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34 | TotalLength dw ? |
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35 | Identification dw ? |
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36 | FlagsAndFragmentOffset dw ? ; Flags[0-2] and FragmentOffset[3-15] |
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37 | TimeToLive db ? ; |
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38 | Protocol db ? |
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39 | HeaderChecksum dw ? |
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40 | SourceAddress dd ? |
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41 | DestinationAddress dd ? |
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42 | |||
43 | ends |
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44 | |||
4052 | hidnplayr | 45 | struct IPv4_FRAGMENT_slot |
3545 | hidnplayr | 46 | |
47 | ttl dw ? ; Time to live for this entry, 0 for empty slot's |
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48 | id dw ? ; Identification field from IP header |
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49 | SrcIP dd ? ; .. from IP header |
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50 | DstIP dd ? ; .. from IP header |
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51 | ptr dd ? ; Pointer to first packet |
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52 | |||
53 | ends |
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54 | |||
4052 | hidnplayr | 55 | struct IPv4_FRAGMENT_entry ; This structure will replace the ethernet header in fragmented ip packets |
3545 | hidnplayr | 56 | |
57 | PrevPtr dd ? ; Pointer to previous fragment entry (-1 for first packet) |
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58 | NextPtr dd ? ; Pointer to next fragment entry (-1 for last packet) |
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59 | Owner dd ? ; Pointer to structure of driver |
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60 | rb 2 ; to match ethernet header size ;;; FIXME |
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61 | ; Ip header begins here (we will need the IP header to re-construct the complete packet) |
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62 | ends |
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63 | |||
4387 | hidnplayr | 64 | struct IPv4_ROUTE |
3545 | hidnplayr | 65 | |
4387 | hidnplayr | 66 | Destination dd ? |
67 | Gateway dd ? |
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68 | Flags dd ? |
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69 | Use dd ? |
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70 | Interface dd ? |
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71 | |||
72 | ends |
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73 | |||
74 | |||
3698 | hidnplayr | 75 | uglobal |
3545 | hidnplayr | 76 | align 4 |
77 | |||
3600 | hidnplayr | 78 | IP_LIST rd NET_DEVICES_MAX |
79 | SUBNET_LIST rd NET_DEVICES_MAX |
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80 | DNS_LIST rd NET_DEVICES_MAX |
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81 | GATEWAY_LIST rd NET_DEVICES_MAX |
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82 | BROADCAST_LIST rd NET_DEVICES_MAX |
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3545 | hidnplayr | 83 | |
4052 | hidnplayr | 84 | IPv4_packets_tx rd NET_DEVICES_MAX |
85 | IPv4_packets_rx rd NET_DEVICES_MAX |
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86 | IPv4_packets_dumped rd NET_DEVICES_MAX |
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3545 | hidnplayr | 87 | |
4052 | hidnplayr | 88 | IPv4_FRAGMENT_LIST rb IPv4_MAX_FRAGMENTS * sizeof.IPv4_FRAGMENT_slot |
3698 | hidnplayr | 89 | |
4387 | hidnplayr | 90 | IPv4_ROUTES rd IPv4_MAX_ROUTES * sizeof.IPv4_ROUTE |
91 | |||
3545 | hidnplayr | 92 | endg |
93 | |||
94 | |||
95 | ;----------------------------------------------------------------- |
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96 | ; |
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97 | ; IPv4_init |
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98 | ; |
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99 | ; This function resets all IP variables |
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100 | ; |
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101 | ;----------------------------------------------------------------- |
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102 | macro IPv4_init { |
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103 | |||
104 | xor eax, eax |
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105 | mov edi, IP_LIST |
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4052 | hidnplayr | 106 | mov ecx, 7*NET_DEVICES_MAX + (sizeof.IPv4_FRAGMENT_slot*IPv4_MAX_FRAGMENTS)/4 |
3711 | clevermous | 107 | rep stosd |
3545 | hidnplayr | 108 | |
109 | } |
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110 | |||
111 | |||
112 | ;----------------------------------------------------------------- |
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113 | ; |
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114 | ; Decrease TimeToLive of all fragment slots |
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115 | ; |
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116 | ;----------------------------------------------------------------- |
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117 | macro IPv4_decrease_fragment_ttls { |
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118 | |||
119 | local .loop, .next |
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120 | |||
4052 | hidnplayr | 121 | mov esi, IPv4_FRAGMENT_LIST |
122 | mov ecx, IPv4_MAX_FRAGMENTS |
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3545 | hidnplayr | 123 | .loop: |
4052 | hidnplayr | 124 | cmp [esi + IPv4_FRAGMENT_slot.ttl], 0 |
3545 | hidnplayr | 125 | je .next |
4052 | hidnplayr | 126 | dec [esi + IPv4_FRAGMENT_slot.ttl] |
3545 | hidnplayr | 127 | jz .died |
128 | .next: |
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4052 | hidnplayr | 129 | add esi, sizeof.IPv4_FRAGMENT_slot |
3545 | hidnplayr | 130 | dec ecx |
131 | jnz .loop |
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132 | jmp .done |
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133 | |||
134 | .died: |
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3556 | hidnplayr | 135 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4 Fragment slot timed-out!\n" |
3545 | hidnplayr | 136 | ;;; TODO: clear all entry's of timed-out slot |
137 | jmp .next |
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138 | |||
139 | .done: |
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140 | } |
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141 | |||
142 | |||
143 | |||
144 | macro IPv4_checksum ptr { |
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145 | |||
146 | ; This is the fast procedure to create or check an IP header without options |
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147 | ; To create a new checksum, the checksum field must be set to 0 before computation |
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148 | ; To check an existing checksum, leave the checksum as is, and it will be 0 after this procedure, if it was correct |
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149 | |||
150 | push ebx |
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151 | xor ebx, ebx |
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152 | add bl, [ptr+1] |
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153 | adc bh, [ptr+0] |
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154 | |||
155 | adc bl, [ptr+3] |
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156 | adc bh, [ptr+2] |
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157 | |||
158 | adc bl, [ptr+5] |
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159 | adc bh, [ptr+4] |
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160 | |||
161 | adc bl, [ptr+7] |
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162 | adc bh, [ptr+6] |
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163 | |||
164 | adc bl, [ptr+9] |
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165 | adc bh, [ptr+8] |
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166 | |||
167 | ; we skip 11th and 12th byte, they are the checksum bytes and should be 0 for re-calculation |
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168 | |||
169 | adc bl, [ptr+13] |
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170 | adc bh, [ptr+12] |
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171 | |||
172 | adc bl, [ptr+15] |
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173 | adc bh, [ptr+14] |
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174 | |||
175 | adc bl, [ptr+17] |
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176 | adc bh, [ptr+16] |
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177 | |||
178 | adc bl, [ptr+19] |
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179 | adc bh, [ptr+18] |
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180 | |||
181 | adc ebx, 0 |
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182 | |||
183 | push ecx |
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184 | mov ecx, ebx |
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185 | shr ecx, 16 |
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186 | and ebx, 0xffff |
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187 | add ebx, ecx |
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188 | |||
189 | mov ecx, ebx |
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190 | shr ecx, 16 |
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191 | add ebx, ecx |
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192 | |||
193 | not bx |
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194 | jnz .not_zero |
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195 | dec bx |
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196 | .not_zero: |
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197 | xchg bl, bh |
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198 | pop ecx |
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199 | |||
200 | neg word [ptr+10] ; zero will stay zero so we just get the checksum |
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201 | add word [ptr+10], bx ; , else we will get (new checksum - old checksum) in the end, wich should be 0 :) |
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202 | pop ebx |
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203 | |||
204 | } |
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205 | |||
206 | |||
207 | |||
208 | ;----------------------------------------------------------------- |
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209 | ; |
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210 | ; IPv4_input: |
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211 | ; |
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212 | ; Will check if IPv4 Packet isnt damaged |
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213 | ; and call appropriate handler. (TCP/UDP/ICMP/..) |
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214 | ; |
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215 | ; It will also re-construct fragmented packets |
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216 | ; |
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217 | ; IN: Pointer to buffer in [esp] |
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218 | ; size of buffer in [esp+4] |
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219 | ; pointer to device struct in ebx |
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220 | ; pointer to IPv4 header in edx |
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221 | ; size of IPv4 packet in ecx |
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222 | ; OUT: / |
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223 | ; |
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224 | ;----------------------------------------------------------------- |
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225 | align 4 |
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226 | IPv4_input: ; TODO: add IPv4 raw sockets support |
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227 | |||
5522 | hidnplayr | 228 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: packet from %u.%u.%u.%u ",\ |
3545 | hidnplayr | 229 | [edx + IPv4_header.SourceAddress + 0]:1,[edx + IPv4_header.SourceAddress + 1]:1,\ |
230 | [edx + IPv4_header.SourceAddress + 2]:1,[edx + IPv4_header.SourceAddress + 3]:1 |
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5522 | hidnplayr | 231 | DEBUGF DEBUG_NETWORK_VERBOSE, "to %u.%u.%u.%u\n",\ |
3545 | hidnplayr | 232 | [edx + IPv4_header.DestinationAddress + 0]:1,[edx + IPv4_header.DestinationAddress + 1]:1,\ |
233 | [edx + IPv4_header.DestinationAddress + 2]:1,[edx + IPv4_header.DestinationAddress + 3]:1 |
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234 | |||
235 | ;------------------------------- |
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236 | ; re-calculate the checksum |
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237 | |||
238 | IPv4_checksum edx |
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239 | jnz .dump ; if checksum isn't valid then dump packet |
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240 | |||
3556 | hidnplayr | 241 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Checksum ok\n" |
3545 | hidnplayr | 242 | |
243 | ;----------------------------------- |
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244 | ; Check if destination IP is correct |
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245 | |||
3643 | hidnplayr | 246 | call NET_ptr_to_num4 |
3545 | hidnplayr | 247 | |
248 | ; check if it matches local ip (Using RFC1122 strong end system model) |
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249 | |||
250 | mov eax, [edx + IPv4_header.DestinationAddress] |
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251 | cmp eax, [IP_LIST + edi] |
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252 | je .ip_ok |
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253 | |||
254 | ; check for broadcast (IP or (not SUBNET)) |
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255 | |||
256 | cmp eax, [BROADCAST_LIST + edi] |
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257 | je .ip_ok |
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258 | |||
259 | ; or a special broadcast (255.255.255.255) |
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260 | |||
261 | cmp eax, 0xffffffff |
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262 | je .ip_ok |
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263 | |||
264 | ; maybe it's a multicast (224.0.0.0/4) |
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265 | |||
266 | and eax, 0x0fffffff |
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267 | cmp eax, 224 |
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268 | je .ip_ok |
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269 | |||
4976 | hidnplayr | 270 | ; maybe we just dont have an IP yet and should accept everything on the IP level |
3545 | hidnplayr | 271 | |
4976 | hidnplayr | 272 | cmp [IP_LIST + edi], 0 |
3545 | hidnplayr | 273 | je .ip_ok |
274 | |||
275 | ; or it's just not meant for us.. :( |
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276 | |||
3556 | hidnplayr | 277 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Destination address does not match!\n" |
3545 | hidnplayr | 278 | jmp .dump |
279 | |||
280 | ;------------------------ |
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281 | ; Now we can update stats |
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282 | |||
283 | .ip_ok: |
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4052 | hidnplayr | 284 | inc [IPv4_packets_rx + edi] |
3545 | hidnplayr | 285 | |
286 | ;---------------------------------- |
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287 | ; Check if the packet is fragmented |
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288 | |||
289 | test [edx + IPv4_header.FlagsAndFragmentOffset], 1 shl 5 ; Is 'more fragments' flag set ? |
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290 | jnz .has_fragments ; If so, we definately have a fragmented packet |
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291 | |||
292 | test [edx + IPv4_header.FlagsAndFragmentOffset], 0xff1f ; If flag is not set, but there is a fragment offset, the packet is last in series of fragmented packets |
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293 | jnz .is_last_fragment |
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294 | |||
295 | ;------------------------------------------------------------------- |
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296 | ; No, it's just a regular IP packet, pass it to the higher protocols |
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297 | |||
298 | .handle_it: ; We reach here if packet hasnt been fragmented, or when it already has been re-constructed |
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299 | |||
300 | movzx esi, [edx + IPv4_header.VersionAndIHL] ; Calculate Header length by using IHL field |
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301 | and esi, 0x0000000f ; |
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302 | shl esi, 2 ; |
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303 | |||
304 | movzx ecx, [edx + IPv4_header.TotalLength] ; Calculate length of encapsulated Packet |
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305 | xchg cl, ch ; |
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306 | sub ecx, esi ; |
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307 | |||
308 | lea edi, [edx + IPv4_header.SourceAddress] ; make edi ptr to source and dest IPv4 address |
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309 | mov al, [edx + IPv4_header.Protocol] |
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310 | add esi, edx ; make esi ptr to data |
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311 | |||
312 | cmp al, IP_PROTO_TCP |
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313 | je TCP_input |
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314 | |||
315 | cmp al, IP_PROTO_UDP |
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316 | je UDP_input |
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317 | |||
318 | cmp al, IP_PROTO_ICMP |
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319 | je ICMP_input |
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320 | |||
3556 | hidnplayr | 321 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: unknown protocol %u\n", al |
3545 | hidnplayr | 322 | |
323 | .dump: |
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3556 | hidnplayr | 324 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: dumping\n" |
4052 | hidnplayr | 325 | inc [IPv4_packets_dumped] ; FIXME: use correct interface |
5522 | hidnplayr | 326 | call NET_BUFF_free |
3545 | hidnplayr | 327 | ret |
328 | |||
329 | |||
330 | ;--------------------------- |
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331 | ; Fragmented packet handler |
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332 | |||
333 | |||
334 | .has_fragments: |
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335 | movzx eax, [edx + IPv4_header.FlagsAndFragmentOffset] |
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336 | xchg al, ah |
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337 | shl ax, 3 |
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338 | |||
4258 | hidnplayr | 339 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: fragmented packet offset=%u id=%x ptr=0x%x\n", ax, [edx + IPv4_header.Identification]:4, edx |
3545 | hidnplayr | 340 | |
341 | test ax, ax ; Is this the first packet of the fragment? |
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342 | jz .is_first_fragment |
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343 | |||
344 | |||
345 | ;------------------------------------------------------- |
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346 | ; We have a fragmented IP packet, but it's not the first |
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347 | |||
3556 | hidnplayr | 348 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Middle fragment packet received!\n" |
3545 | hidnplayr | 349 | |
350 | call IPv4_find_fragment_slot |
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351 | cmp esi, -1 |
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352 | je .dump |
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353 | |||
4052 | hidnplayr | 354 | mov [esi + IPv4_FRAGMENT_slot.ttl], 15 ; Reset the ttl |
355 | mov esi, [esi + IPv4_FRAGMENT_slot.ptr] |
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3545 | hidnplayr | 356 | or edi, -1 |
357 | .find_last_entry: ; The following routine will try to find the last entry |
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4052 | hidnplayr | 358 | cmp edi, [esi + IPv4_FRAGMENT_entry.PrevPtr] |
3545 | hidnplayr | 359 | jne .destroy_slot ; Damn, something screwed up, remove the whole slot (and free buffers too if possible!) |
360 | mov edi, esi |
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4052 | hidnplayr | 361 | mov esi, [esi + IPv4_FRAGMENT_entry.NextPtr] |
3545 | hidnplayr | 362 | cmp esi, -1 |
363 | jne .find_last_entry |
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364 | ; We found the last entry (pointer is now in edi) |
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365 | ; We are going to overwrite the ethernet header in received packet with a FRAGMENT_entry structure |
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366 | |||
367 | pop eax ; pointer to packet |
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4052 | hidnplayr | 368 | mov [edi + IPv4_FRAGMENT_entry.NextPtr], eax ; update pointer of previous entry to the new entry |
369 | mov [eax + IPv4_FRAGMENT_entry.NextPtr], -1 |
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370 | mov [eax + IPv4_FRAGMENT_entry.PrevPtr], edi |
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371 | mov [eax + IPv4_FRAGMENT_entry.Owner], ebx |
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3545 | hidnplayr | 372 | |
373 | ret |
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374 | |||
375 | |||
376 | ;------------------------------------ |
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377 | ; We have received the first fragment |
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378 | |||
379 | .is_first_fragment: |
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3556 | hidnplayr | 380 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: First fragment packet received!\n" |
3545 | hidnplayr | 381 | ; try to locate a free slot.. |
4052 | hidnplayr | 382 | mov ecx, IPv4_MAX_FRAGMENTS |
383 | mov esi, IPv4_FRAGMENT_LIST |
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3545 | hidnplayr | 384 | .find_free_slot: |
4052 | hidnplayr | 385 | cmp word [esi + IPv4_FRAGMENT_slot.ttl], 0 |
3545 | hidnplayr | 386 | je .found_free_slot |
4052 | hidnplayr | 387 | add esi, sizeof.IPv4_FRAGMENT_slot |
3545 | hidnplayr | 388 | loop .find_free_slot |
389 | jmp .dump ; If no free slot was found, dump the packet |
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390 | |||
391 | .found_free_slot: ; We found a free slot, let's fill in the FRAGMENT_slot structure |
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4052 | hidnplayr | 392 | mov [esi + IPv4_FRAGMENT_slot.ttl], 15 ; RFC recommends 15 secs as ttl |
3545 | hidnplayr | 393 | mov ax, [edx + IPv4_header.Identification] |
4052 | hidnplayr | 394 | mov [esi + IPv4_FRAGMENT_slot.id], ax |
3545 | hidnplayr | 395 | mov eax, [edx + IPv4_header.SourceAddress] |
4052 | hidnplayr | 396 | mov [esi + IPv4_FRAGMENT_slot.SrcIP], eax |
3545 | hidnplayr | 397 | mov eax, [edx + IPv4_header.DestinationAddress] |
4052 | hidnplayr | 398 | mov [esi + IPv4_FRAGMENT_slot.DstIP], eax |
3545 | hidnplayr | 399 | pop eax |
4052 | hidnplayr | 400 | mov [esi + IPv4_FRAGMENT_slot.ptr], eax |
3545 | hidnplayr | 401 | ; Now, replace ethernet header in original buffer with a FRAGMENT_entry structure |
4052 | hidnplayr | 402 | mov [eax + IPv4_FRAGMENT_entry.NextPtr], -1 |
403 | mov [eax + IPv4_FRAGMENT_entry.PrevPtr], -1 |
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404 | mov [eax + IPv4_FRAGMENT_entry.Owner], ebx |
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3545 | hidnplayr | 405 | |
406 | ret |
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407 | |||
408 | |||
409 | ;----------------------------------- |
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410 | ; We have received the last fragment |
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411 | |||
412 | .is_last_fragment: |
||
3556 | hidnplayr | 413 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Last fragment packet received!\n" |
3545 | hidnplayr | 414 | |
415 | call IPv4_find_fragment_slot |
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416 | cmp esi, -1 |
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417 | je .dump |
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418 | |||
4052 | hidnplayr | 419 | mov esi, [esi + IPv4_FRAGMENT_slot.ptr] ; We found the first entry, let's calculate total size of the packet in eax, so we can allocate a buffer |
3545 | hidnplayr | 420 | push esi |
421 | xor eax, eax |
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422 | or edi, -1 |
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423 | |||
424 | .count_bytes: |
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4052 | hidnplayr | 425 | cmp [esi + IPv4_FRAGMENT_entry.PrevPtr], edi |
426 | jne .destroy_slot_pop ; Damn, something screwed up, remove the whole slot (and free buffers too if possible!) |
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427 | mov cx, [esi + sizeof.IPv4_FRAGMENT_entry + IPv4_header.TotalLength] ; Add total length |
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3545 | hidnplayr | 428 | xchg cl, ch |
3556 | hidnplayr | 429 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Packet size=%u\n", cx |
3545 | hidnplayr | 430 | add ax, cx |
4052 | hidnplayr | 431 | movzx cx, [esi + sizeof.IPv4_FRAGMENT_entry + IPv4_header.VersionAndIHL] ; Sub Header length |
3545 | hidnplayr | 432 | and cx, 0x000F |
433 | shl cx, 2 |
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3556 | hidnplayr | 434 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Header size=%u\n", cx |
3545 | hidnplayr | 435 | sub ax, cx |
436 | mov edi, esi |
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4052 | hidnplayr | 437 | mov esi, [esi + IPv4_FRAGMENT_entry.NextPtr] |
3545 | hidnplayr | 438 | cmp esi, -1 |
439 | jne .count_bytes |
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440 | |||
441 | mov esi, [esp+4] |
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4052 | hidnplayr | 442 | mov [edi + IPv4_FRAGMENT_entry.NextPtr], esi ; Add this packet to the chain, this simplifies the following code |
443 | mov [esi + IPv4_FRAGMENT_entry.NextPtr], -1 |
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444 | mov [esi + IPv4_FRAGMENT_entry.PrevPtr], edi |
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445 | mov [esi + IPv4_FRAGMENT_entry.Owner], ebx |
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3545 | hidnplayr | 446 | |
4052 | hidnplayr | 447 | mov cx, [edx + IPv4_header.TotalLength] ; Note: This time we dont substract Header length |
3545 | hidnplayr | 448 | xchg cl, ch |
3556 | hidnplayr | 449 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Packet size=%u\n", cx |
3545 | hidnplayr | 450 | add ax, cx |
3556 | hidnplayr | 451 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Total Received data size=%u\n", eax |
3545 | hidnplayr | 452 | |
453 | push eax |
||
454 | mov ax, [edx + IPv4_header.FlagsAndFragmentOffset] |
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455 | xchg al, ah |
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456 | shl ax, 3 |
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457 | add cx, ax |
||
458 | pop eax |
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3556 | hidnplayr | 459 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Total Fragment size=%u\n", ecx |
3545 | hidnplayr | 460 | |
461 | cmp ax, cx |
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462 | jne .destroy_slot_pop |
||
463 | |||
464 | push eax |
||
465 | push eax |
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466 | call kernel_alloc |
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467 | test eax, eax |
||
468 | je .destroy_slot_pop ; If we dont have enough space to allocate the buffer, discard all packets in slot |
||
469 | mov edx, [esp+4] ; Get pointer to first fragment entry back in edx |
||
470 | |||
471 | .rebuild_packet_loop: |
||
4052 | hidnplayr | 472 | movzx ecx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.FlagsAndFragmentOffset] ; Calculate the fragment offset |
3545 | hidnplayr | 473 | xchg cl, ch ; intel byte order |
474 | shl cx, 3 ; multiply by 8 and clear first 3 bits |
||
3556 | hidnplayr | 475 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Fragment offset=%u\n", cx |
3545 | hidnplayr | 476 | |
477 | lea edi, [eax + ecx] ; Notice that edi will be equal to eax for first fragment |
||
4258 | hidnplayr | 478 | movzx ebx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.VersionAndIHL] ; Find header size (in ebx) of fragment |
3545 | hidnplayr | 479 | and bx, 0x000F ; |
480 | shl bx, 2 ; |
||
481 | |||
4258 | hidnplayr | 482 | lea esi, [edx + sizeof.IPv4_FRAGMENT_entry] ; Set esi to the correct begin of fragment |
483 | movzx ecx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.TotalLength] ; Calculate total length of fragment |
||
3545 | hidnplayr | 484 | xchg cl, ch ; intel byte order |
485 | |||
486 | cmp edi, eax ; Is this packet the first fragment ? |
||
487 | je .first_fragment |
||
488 | sub cx, bx ; If not, dont copy the header |
||
489 | add esi, ebx ; |
||
490 | .first_fragment: |
||
491 | |||
4258 | hidnplayr | 492 | |
493 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Copying %u bytes from 0x%x to 0x%x\n", ecx, esi, edi |
||
3545 | hidnplayr | 494 | push cx ; First copy dword-wise, then byte-wise |
495 | shr cx, 2 ; |
||
3711 | clevermous | 496 | rep movsd ; |
3545 | hidnplayr | 497 | pop cx ; |
498 | and cx, 3 ; |
||
3711 | clevermous | 499 | rep movsb ; |
3545 | hidnplayr | 500 | |
501 | push eax |
||
4259 | hidnplayr | 502 | push [edx + IPv4_FRAGMENT_entry.Owner] ; we need to remeber the owner, in case this is the last packet |
503 | push [edx + IPv4_FRAGMENT_entry.NextPtr] ; Set edx to the next pointer |
||
3545 | hidnplayr | 504 | push edx ; Push pointer to fragment onto stack |
4258 | hidnplayr | 505 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Next Fragment: 0x%x\n", edx |
5522 | hidnplayr | 506 | call NET_BUFF_free ; free the previous fragment buffer (this uses the value from stack) |
4258 | hidnplayr | 507 | pop edx ebx eax |
3545 | hidnplayr | 508 | cmp edx, -1 ; Check if it is last fragment in chain |
509 | jne .rebuild_packet_loop |
||
510 | |||
511 | pop ecx |
||
512 | xchg cl, ch |
||
513 | mov edx, eax |
||
514 | mov [edx + IPv4_header.TotalLength], cx |
||
4259 | hidnplayr | 515 | add esp, 12 |
3545 | hidnplayr | 516 | xchg cl, ch |
4259 | hidnplayr | 517 | push ecx edx ; size and pointer |
518 | jmp .handle_it ; edx = buf ptr, ecx = size, [esp] buf ptr, [esp+4], total size, ebx=device ptr |
||
3545 | hidnplayr | 519 | |
520 | .destroy_slot_pop: |
||
521 | add esp, 4 |
||
522 | .destroy_slot: |
||
3556 | hidnplayr | 523 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Destroy fragment slot!\n" |
3545 | hidnplayr | 524 | ; TODO! |
525 | jmp .dump |
||
526 | |||
527 | |||
528 | |||
529 | |||
530 | |||
531 | ;----------------------------------------------------------------- |
||
532 | ; |
||
533 | ; find fragment slot |
||
534 | ; |
||
535 | ; IN: pointer to fragmented packet in edx |
||
536 | ; OUT: pointer to slot in esi, -1 on error |
||
537 | ; |
||
538 | ;----------------------------------------------------------------- |
||
539 | align 4 |
||
540 | IPv4_find_fragment_slot: |
||
541 | |||
542 | ;;; TODO: the RFC says we should check protocol number too |
||
543 | |||
544 | push eax ebx ecx edx |
||
545 | mov ax, [edx + IPv4_header.Identification] |
||
4052 | hidnplayr | 546 | mov ecx, IPv4_MAX_FRAGMENTS |
547 | mov esi, IPv4_FRAGMENT_LIST |
||
3545 | hidnplayr | 548 | mov ebx, [edx + IPv4_header.SourceAddress] |
549 | mov edx, [edx + IPv4_header.DestinationAddress] |
||
550 | .find_slot: |
||
4052 | hidnplayr | 551 | cmp [esi + IPv4_FRAGMENT_slot.id], ax |
3545 | hidnplayr | 552 | jne .try_next |
4052 | hidnplayr | 553 | cmp [esi + IPv4_FRAGMENT_slot.SrcIP], ebx |
3545 | hidnplayr | 554 | jne .try_next |
4052 | hidnplayr | 555 | cmp [esi + IPv4_FRAGMENT_slot.DstIP], edx |
3545 | hidnplayr | 556 | je .found_slot |
557 | .try_next: |
||
4052 | hidnplayr | 558 | add esi, sizeof.IPv4_FRAGMENT_slot |
3545 | hidnplayr | 559 | loop .find_slot |
560 | |||
561 | or esi, -1 |
||
562 | .found_slot: |
||
563 | pop edx ecx ebx eax |
||
564 | ret |
||
565 | |||
566 | |||
567 | ;------------------------------------------------------------------ |
||
568 | ; |
||
569 | ; IPv4_output |
||
570 | ; |
||
4052 | hidnplayr | 571 | ; IN: eax = Destination IP |
572 | ; ecx = data length |
||
573 | ; edx = Source IP |
||
5015 | hidnplayr | 574 | ; di = TTL shl 8 + protocol |
3545 | hidnplayr | 575 | ; |
5015 | hidnplayr | 576 | ; OUT: eax = pointer to buffer start / 0 on error |
577 | ; ebx = device ptr (send packet through this device) |
||
578 | ; ecx = data length |
||
579 | ; edx = size of complete frame |
||
580 | ; edi = start of IPv4 payload |
||
3545 | hidnplayr | 581 | ; |
582 | ;------------------------------------------------------------------ |
||
583 | align 4 |
||
584 | IPv4_output: |
||
585 | |||
3601 | hidnplayr | 586 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output: size=%u ip=0x%x\n", ecx, eax |
3545 | hidnplayr | 587 | |
588 | cmp ecx, 65500 ; Max IPv4 packet size |
||
589 | ja .too_large |
||
590 | |||
4052 | hidnplayr | 591 | push ecx di eax |
592 | call IPv4_route ; outputs device number in edi, dest ip in eax, source IP in edx |
||
593 | push edx |
||
3610 | hidnplayr | 594 | test edi, edi |
595 | jz .loopback |
||
596 | |||
3545 | hidnplayr | 597 | call ARP_IP_to_MAC |
598 | test eax, 0xffff0000 ; error bits |
||
599 | jnz .arp_error |
||
600 | push ebx ; push the mac onto the stack |
||
601 | push ax |
||
602 | |||
4052 | hidnplayr | 603 | inc [IPv4_packets_tx + edi] ; update stats |
3545 | hidnplayr | 604 | |
5015 | hidnplayr | 605 | mov ax, ETHER_PROTO_IPv4 |
3638 | hidnplayr | 606 | mov ebx, [NET_DRV_LIST + edi] |
4052 | hidnplayr | 607 | mov ecx, [esp + 6 + 8 + 2] |
3545 | hidnplayr | 608 | add ecx, sizeof.IPv4_header |
5015 | hidnplayr | 609 | mov edx, esp |
3545 | hidnplayr | 610 | call ETH_output |
611 | jz .eth_error |
||
612 | add esp, 6 ; pop the mac out of the stack |
||
613 | |||
614 | .continue: |
||
615 | xchg cl, ch ; internet byte order |
||
616 | mov [edi + IPv4_header.VersionAndIHL], 0x45 ; IPv4, normal length (no Optional header) |
||
617 | mov [edi + IPv4_header.TypeOfService], 0 ; nothing special, just plain ip packet |
||
618 | mov [edi + IPv4_header.TotalLength], cx |
||
619 | mov [edi + IPv4_header.Identification], 0 ; fragment id: FIXME |
||
620 | mov [edi + IPv4_header.FlagsAndFragmentOffset], 0 |
||
4052 | hidnplayr | 621 | |
3545 | hidnplayr | 622 | mov [edi + IPv4_header.HeaderChecksum], 0 |
623 | popd [edi + IPv4_header.SourceAddress] |
||
624 | popd [edi + IPv4_header.DestinationAddress] |
||
625 | |||
4052 | hidnplayr | 626 | pop word[edi + IPv4_header.TimeToLive] ; ttl shl 8 + protocol |
627 | ; [edi + IPv4_header.Protocol] |
||
628 | |||
3545 | hidnplayr | 629 | pop ecx |
630 | |||
631 | IPv4_checksum edi |
||
632 | add edi, sizeof.IPv4_header |
||
3556 | hidnplayr | 633 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output: success!\n" |
3545 | hidnplayr | 634 | ret |
635 | |||
636 | .eth_error: |
||
3603 | hidnplayr | 637 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: ethernet error\n" |
3545 | hidnplayr | 638 | add esp, 3*4+2+6 |
5015 | hidnplayr | 639 | xor eax, eax |
3545 | hidnplayr | 640 | ret |
641 | |||
642 | .arp_error: |
||
3603 | hidnplayr | 643 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: ARP error=%x\n", eax |
3545 | hidnplayr | 644 | add esp, 3*4+2 |
5015 | hidnplayr | 645 | xor eax, eax |
3545 | hidnplayr | 646 | ret |
647 | |||
648 | .too_large: |
||
3556 | hidnplayr | 649 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: Packet too large!\n" |
5015 | hidnplayr | 650 | xor eax, eax |
3545 | hidnplayr | 651 | ret |
652 | |||
653 | .loopback: |
||
5522 | hidnplayr | 654 | mov dword [esp], eax ; set source IP to dest IP |
3610 | hidnplayr | 655 | mov ecx, [esp + 10] |
3545 | hidnplayr | 656 | add ecx, sizeof.IPv4_header |
3600 | hidnplayr | 657 | mov edi, AF_INET4 |
3545 | hidnplayr | 658 | call LOOP_output |
659 | jmp .continue |
||
660 | |||
661 | |||
662 | |||
663 | |||
664 | ;------------------------------------------------------------------ |
||
665 | ; |
||
666 | ; IPv4_output_raw |
||
667 | ; |
||
668 | ; IN: eax = socket ptr |
||
669 | ; ecx = data length |
||
670 | ; esi = data ptr |
||
671 | ; |
||
5015 | hidnplayr | 672 | ; OUT: eax = -1 on error |
3545 | hidnplayr | 673 | ; |
674 | ;------------------------------------------------------------------ |
||
675 | align 4 |
||
676 | IPv4_output_raw: |
||
677 | |||
678 | DEBUGF 1,"IPv4_output_raw: size=%u ptr=%x socket=%x\n", ecx, esi, eax |
||
679 | |||
680 | cmp ecx, 1480 ;;;;; FIXME |
||
681 | ja .too_large |
||
682 | |||
683 | sub esp, 8 |
||
684 | push esi eax |
||
685 | |||
686 | call IPv4_route |
||
687 | call ARP_IP_to_MAC |
||
688 | |||
689 | test eax, 0xffff0000 ; error bits |
||
690 | jnz .arp_error |
||
691 | |||
692 | push ebx ; push the mac |
||
693 | push ax |
||
694 | |||
4052 | hidnplayr | 695 | inc [IPv4_packets_tx + 4*edi] |
5015 | hidnplayr | 696 | mov ax, ETHER_PROTO_IPv4 |
3601 | hidnplayr | 697 | mov ebx, [NET_DRV_LIST + 4*edi] |
3545 | hidnplayr | 698 | mov ecx, [esp + 6 + 4] |
699 | add ecx, sizeof.IPv4_header |
||
5015 | hidnplayr | 700 | mov edx, esp |
3545 | hidnplayr | 701 | call ETH_output |
702 | jz .error |
||
703 | add esp, 6 ; pop the mac |
||
704 | |||
705 | mov dword[esp+4+4], edx |
||
706 | mov dword[esp+4+4+4], eax |
||
707 | |||
708 | pop eax esi |
||
709 | ;; todo: check socket options if we should add header, or just compute checksum |
||
710 | |||
711 | push edi ecx |
||
3711 | clevermous | 712 | rep movsb |
3545 | hidnplayr | 713 | pop ecx edi |
714 | |||
715 | ; [edi + IPv4_header.VersionAndIHL] ; IPv4, normal length (no Optional header) |
||
716 | ; [edi + IPv4_header.TypeOfService] ; nothing special, just plain ip packet |
||
717 | ; [edi + IPv4_header.TotalLength] |
||
718 | ; [edi + IPv4_header.TotalLength] ; internet byte order |
||
719 | ; [edi + IPv4_header.FlagsAndFragmentOffset] |
||
720 | |||
721 | mov [edi + IPv4_header.HeaderChecksum], 0 |
||
722 | |||
723 | ; [edi + IPv4_header.TimeToLive] ; ttl shl 8 + protocol |
||
724 | ; [edi + IPv4_header.Protocol] |
||
725 | ; [edi + IPv4_header.Identification] ; fragment id |
||
726 | ; [edi + IPv4_header.SourceAddress] |
||
727 | ; [edi + IPv4_header.DestinationAddress] |
||
728 | |||
729 | IPv4_checksum edi ;;;; todo: checksum for IP packet with options! |
||
730 | add edi, sizeof.IPv4_header |
||
3556 | hidnplayr | 731 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output_raw: device=%x\n", ebx |
3545 | hidnplayr | 732 | call [ebx + NET_DEVICE.transmit] |
733 | ret |
||
734 | |||
735 | .error: |
||
736 | add esp, 6 |
||
737 | .arp_error: |
||
738 | add esp, 8+4+4 |
||
739 | .too_large: |
||
3556 | hidnplayr | 740 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output_raw: Failed\n" |
5015 | hidnplayr | 741 | or eax, -1 |
3545 | hidnplayr | 742 | ret |
743 | |||
744 | |||
745 | ;-------------------------------------------------------- |
||
746 | ; |
||
747 | ; |
||
748 | ; IN: dword [esp] = pointer to buffer containing ipv4 packet to be fragmented |
||
749 | ; esi = pointer to ip header in that buffer |
||
750 | ; ecx = max size of fragments |
||
751 | ; |
||
752 | ; OUT: / |
||
753 | ; |
||
754 | ;-------------------------------------------------------- |
||
755 | |||
756 | align 4 |
||
757 | IPv4_fragment: |
||
758 | |||
3556 | hidnplayr | 759 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_fragment\n" |
3545 | hidnplayr | 760 | |
761 | and ecx, not 111b ; align 4 |
||
762 | |||
763 | cmp ecx, sizeof.IPv4_header + 8 ; must be able to put at least 8 bytes |
||
764 | jb .err2 |
||
765 | |||
766 | push esi ecx |
||
767 | mov eax, [esi + IPv4_header.DestinationAddress] |
||
768 | call ARP_IP_to_MAC |
||
769 | pop ecx esi |
||
770 | cmp eax, -1 |
||
771 | jz .err2 |
||
772 | |||
773 | push ebx |
||
774 | push ax |
||
775 | |||
776 | mov ebx, [NET_DRV_LIST] |
||
777 | lea eax, [ebx + ETH_DEVICE.mac] |
||
778 | push eax |
||
779 | |||
780 | |||
781 | push esi ; ptr to ip header |
||
782 | sub ecx, sizeof.IPv4_header ; substract header size |
||
783 | push ecx ; max data size |
||
784 | push dword 0 ; offset |
||
785 | |||
786 | .new_fragment: |
||
3556 | hidnplayr | 787 | DEBUGF DEBUG_NETWORK_VERBOSE, "Ipv4_fragment: new fragment" |
3545 | hidnplayr | 788 | |
5015 | hidnplayr | 789 | mov ax, ETHER_PROTO_IPv4 |
3545 | hidnplayr | 790 | lea ebx, [esp + 4*4] |
791 | call ETH_output |
||
792 | jz .err |
||
793 | |||
794 | ; copy header |
||
795 | mov esi, [esp + 2*4] |
||
796 | mov ecx, 5 ; 5 dwords: TODO: use IHL field of the header! |
||
3711 | clevermous | 797 | rep movsd |
3545 | hidnplayr | 798 | |
799 | ; copy data |
||
800 | mov esi, [esp + 2*4] |
||
801 | add esi, sizeof.IPv4_header |
||
802 | add esi, [esp] ; offset |
||
803 | |||
804 | mov ecx, [esp + 1*4] |
||
3556 | hidnplayr | 805 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_fragment: copying %u bytes\n", ecx |
3711 | clevermous | 806 | rep movsb |
3545 | hidnplayr | 807 | |
808 | ; now, correct header |
||
809 | mov ecx, [esp + 1*4] |
||
810 | add ecx, sizeof.IPv4_header |
||
811 | xchg cl, ch |
||
812 | mov [edi + IPv4_header.TotalLength], cx |
||
813 | |||
814 | mov ecx, [esp] ; offset |
||
815 | xchg cl, ch |
||
816 | |||
817 | ; cmp dword[esp + 4*4], 0 ; last fragment?;<<<<<< |
||
818 | ; je .last_fragment |
||
819 | or cx, 1 shl 2 ; more fragments |
||
820 | ; .last_fragment: |
||
821 | mov [edi + IPv4_header.FlagsAndFragmentOffset], cx |
||
822 | |||
823 | mov [edi + IPv4_header.HeaderChecksum], 0 |
||
824 | |||
825 | ;<<<<<<<<<<<<<<<<<<<<<<<<<<<<< send the packet |
||
826 | mov ecx, [esp + 1*4] |
||
827 | |||
828 | push edx eax |
||
829 | IPv4_checksum edi |
||
830 | |||
831 | call [ebx + NET_DEVICE.transmit] |
||
832 | ;<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
||
833 | |||
3711 | clevermous | 834 | mov ecx, [esp+4] |
3545 | hidnplayr | 835 | add [esp], ecx |
836 | |||
837 | mov ecx, [esp+3*4+6+4] ; ptr to begin of buff |
||
838 | add ecx, [esp+3*4+6+4+4] ; buff size |
||
839 | sub ecx, [esp+2*4] ; ptr to ip header |
||
840 | add ecx, [esp] ; offset |
||
841 | |||
3556 | hidnplayr | 842 | DEBUGF DEBUG_NETWORK_VERBOSE, "Ipv4_fragment: %u bytes remaining\n", ecx |
3545 | hidnplayr | 843 | |
844 | cmp ecx, [esp+1*4] |
||
845 | jae .new_fragment |
||
846 | |||
847 | mov [esp+4], ecx ; set fragment size to remaining packet size |
||
848 | jmp .new_fragment |
||
849 | |||
850 | .err: |
||
3556 | hidnplayr | 851 | DEBUGF DEBUG_NETWORK_ERROR, "Ipv4_fragment: failed\n" |
3545 | hidnplayr | 852 | .done: |
853 | add esp, 12 + 4 + 6 |
||
854 | .err2: |
||
3556 | hidnplayr | 855 | DEBUGF DEBUG_NETWORK_VERBOSE, "Ipv4_fragment: dumping\n" |
5522 | hidnplayr | 856 | call NET_BUFF_free |
3545 | hidnplayr | 857 | ret |
858 | |||
859 | |||
860 | |||
861 | ;--------------------------------------------------------------------------- |
||
862 | ; |
||
863 | ; IPv4_route |
||
864 | ; |
||
865 | ; IN: eax = Destination IP |
||
4052 | hidnplayr | 866 | ; edx = Source IP |
867 | ; OUT: eax = Destination IP (or gateway IP) |
||
868 | ; edx = Source IP |
||
869 | ; edi = device number*4 |
||
870 | ; DESTROYED: |
||
871 | ; ecx |
||
3545 | hidnplayr | 872 | ; |
873 | ;--------------------------------------------------------------------------- |
||
874 | align 4 |
||
4052 | hidnplayr | 875 | IPv4_route: ; TODO: return error if no valid route found |
3545 | hidnplayr | 876 | |
877 | cmp eax, 0xffffffff |
||
878 | je .broadcast |
||
879 | |||
880 | xor edi, edi |
||
881 | .loop: |
||
4052 | hidnplayr | 882 | mov ebx, [IP_LIST + edi] |
883 | and ebx, [SUBNET_LIST + edi] |
||
3545 | hidnplayr | 884 | jz .next |
4052 | hidnplayr | 885 | mov ecx, eax |
886 | and ecx, [SUBNET_LIST + edi] |
||
887 | cmp ebx, ecx |
||
888 | je .got_it |
||
3545 | hidnplayr | 889 | .next: |
890 | add edi, 4 |
||
4052 | hidnplayr | 891 | cmp edi, 4*NET_DEVICES_MAX |
892 | jb .loop |
||
3545 | hidnplayr | 893 | |
4052 | hidnplayr | 894 | mov eax, [GATEWAY_LIST + 4] ; TODO: let user (or a user space daemon) configure default route |
3545 | hidnplayr | 895 | .broadcast: |
4052 | hidnplayr | 896 | mov edi, 4 ; TODO: same as above |
897 | .got_it: |
||
898 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_route: %u\n", edi |
||
899 | test edx, edx |
||
900 | jnz @f |
||
901 | mov edx, [IP_LIST + edi] |
||
902 | @@: |
||
903 | |||
3545 | hidnplayr | 904 | ret |
905 | |||
906 | |||
907 | |||
908 | ;--------------------------------------------------------------------------- |
||
909 | ; |
||
910 | ; IPv4_get_frgmnt_num |
||
911 | ; |
||
912 | ; IN: / |
||
913 | ; OUT: fragment number in ax |
||
914 | ; |
||
915 | ;--------------------------------------------------------------------------- |
||
916 | align 4 |
||
917 | IPv4_get_frgmnt_num: |
||
918 | xor ax, ax ;;; TODO: replace this with real code |
||
919 | |||
920 | ret |
||
921 | |||
922 | |||
4030 | hidnplayr | 923 | ;----------------------------------------------------------------- |
924 | ; |
||
925 | ; IPv4_connect |
||
926 | ; |
||
927 | ; IN: eax = socket pointer |
||
928 | ; OUT: eax = 0 ok / -1 error |
||
929 | ; ebx = error code |
||
930 | ; |
||
931 | ;------------------------- |
||
932 | align 4 |
||
933 | IPv4_connect: |
||
934 | |||
4035 | hidnplayr | 935 | push eax edx |
4030 | hidnplayr | 936 | lea ecx, [eax + SOCKET.mutex] |
937 | call mutex_lock |
||
4035 | hidnplayr | 938 | pop edx eax |
4030 | hidnplayr | 939 | |
940 | ; Fill in local IP |
||
941 | cmp [eax + IP_SOCKET.LocalIP], 0 |
||
942 | jne @f |
||
943 | push [IP_LIST + 4] ; FIXME: use correct local IP |
||
944 | pop [eax + IP_SOCKET.LocalIP] |
||
945 | |||
946 | ; Fill in remote IP |
||
947 | pushd [edx + 4] |
||
948 | pop [eax + IP_SOCKET.RemoteIP] |
||
949 | |||
4035 | hidnplayr | 950 | ; Set up data receiving queue |
4030 | hidnplayr | 951 | push eax |
4035 | hidnplayr | 952 | init_queue (eax + SOCKET_QUEUE_LOCATION) |
4030 | hidnplayr | 953 | pop eax |
954 | |||
955 | lea ecx, [eax + SOCKET.mutex] |
||
956 | call mutex_unlock |
||
957 | |||
958 | xor eax, eax |
||
959 | ret |
||
960 | |||
961 | |||
3545 | hidnplayr | 962 | ;--------------------------------------------------------------------------- |
963 | ; |
||
964 | ; IPv4_API |
||
965 | ; |
||
966 | ; This function is called by system function 75 |
||
967 | ; |
||
968 | ; IN: subfunction number in bl |
||
969 | ; device number in bh |
||
970 | ; ecx, edx, .. depends on subfunction |
||
971 | ; |
||
972 | ; OUT: |
||
973 | ; |
||
974 | ;--------------------------------------------------------------------------- |
||
975 | align 4 |
||
976 | IPv4_api: |
||
977 | |||
978 | movzx eax, bh |
||
979 | shl eax, 2 |
||
980 | |||
981 | and ebx, 0x000000ff |
||
982 | cmp ebx, .number |
||
983 | ja .error |
||
984 | jmp dword [.table + 4*ebx] |
||
985 | |||
986 | .table: |
||
987 | dd .packets_tx ; 0 |
||
988 | dd .packets_rx ; 1 |
||
989 | dd .read_ip ; 2 |
||
990 | dd .write_ip ; 3 |
||
991 | dd .read_dns ; 4 |
||
992 | dd .write_dns ; 5 |
||
993 | dd .read_subnet ; 6 |
||
994 | dd .write_subnet ; 7 |
||
995 | dd .read_gateway ; 8 |
||
996 | dd .write_gateway ; 9 |
||
997 | .number = ($ - .table) / 4 - 1 |
||
998 | |||
999 | .error: |
||
1000 | mov eax, -1 |
||
1001 | ret |
||
1002 | |||
1003 | .packets_tx: |
||
4052 | hidnplayr | 1004 | mov eax, [IPv4_packets_tx + eax] |
3545 | hidnplayr | 1005 | ret |
1006 | |||
1007 | .packets_rx: |
||
4052 | hidnplayr | 1008 | mov eax, [IPv4_packets_rx + eax] |
3545 | hidnplayr | 1009 | ret |
1010 | |||
1011 | .read_ip: |
||
1012 | mov eax, [IP_LIST + eax] |
||
1013 | ret |
||
1014 | |||
1015 | .write_ip: |
||
1016 | mov [IP_LIST + eax], ecx |
||
1017 | mov edi, eax ; device number, we'll need it for ARP |
||
1018 | |||
1019 | ; pre-calculate the local broadcast address |
||
1020 | mov ebx, [SUBNET_LIST + eax] |
||
1021 | not ebx |
||
1022 | or ebx, ecx |
||
1023 | mov [BROADCAST_LIST + eax], ebx |
||
1024 | |||
3601 | hidnplayr | 1025 | mov ebx, [NET_DRV_LIST + eax] |
1026 | mov eax, [IP_LIST + eax] |
||
3545 | hidnplayr | 1027 | call ARP_output_request ; now send a gratuitous ARP |
1028 | |||
1029 | call NET_send_event |
||
1030 | xor eax, eax |
||
1031 | ret |
||
1032 | |||
1033 | .read_dns: |
||
1034 | mov eax, [DNS_LIST + eax] |
||
1035 | ret |
||
1036 | |||
1037 | .write_dns: |
||
1038 | mov [DNS_LIST + eax], ecx |
||
1039 | call NET_send_event |
||
1040 | xor eax, eax |
||
1041 | ret |
||
1042 | |||
1043 | .read_subnet: |
||
1044 | mov eax, [SUBNET_LIST + eax] |
||
1045 | ret |
||
1046 | |||
1047 | .write_subnet: |
||
1048 | mov [SUBNET_LIST + eax], ecx |
||
1049 | |||
1050 | ; pre-calculate the local broadcast address |
||
1051 | mov ebx, [IP_LIST + eax] |
||
1052 | not ecx |
||
1053 | or ecx, ebx |
||
1054 | mov [BROADCAST_LIST + eax], ecx |
||
1055 | |||
1056 | call NET_send_event |
||
1057 | xor eax, eax |
||
1058 | ret |
||
1059 | |||
1060 | .read_gateway: |
||
1061 | mov eax, [GATEWAY_LIST + eax] |
||
1062 | ret |
||
1063 | |||
1064 | .write_gateway: |
||
1065 | mov [GATEWAY_LIST + eax], ecx |
||
1066 | |||
1067 | call NET_send_event |
||
1068 | xor eax, eax |
||
1069 | ret |