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3545 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3861 | hidnplayr | 3 | ;; Copyright (C) KolibriOS team 2004-2013. 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: 4850 $ |
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 | |||
3556 | 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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3556 | 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 | |||
270 | ; or a loopback address (127.0.0.0/8) |
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271 | |||
272 | and eax, 0x00ffffff |
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273 | cmp eax, 127 |
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274 | je .ip_ok |
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275 | |||
276 | ; or it's just not meant for us.. :( |
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277 | |||
3556 | hidnplayr | 278 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Destination address does not match!\n" |
3545 | hidnplayr | 279 | jmp .dump |
280 | |||
281 | ;------------------------ |
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282 | ; Now we can update stats |
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283 | |||
284 | .ip_ok: |
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4052 | hidnplayr | 285 | inc [IPv4_packets_rx + edi] |
3545 | hidnplayr | 286 | |
287 | ;---------------------------------- |
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288 | ; Check if the packet is fragmented |
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289 | |||
290 | test [edx + IPv4_header.FlagsAndFragmentOffset], 1 shl 5 ; Is 'more fragments' flag set ? |
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291 | jnz .has_fragments ; If so, we definately have a fragmented packet |
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292 | |||
293 | 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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294 | jnz .is_last_fragment |
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295 | |||
296 | ;------------------------------------------------------------------- |
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297 | ; No, it's just a regular IP packet, pass it to the higher protocols |
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298 | |||
299 | .handle_it: ; We reach here if packet hasnt been fragmented, or when it already has been re-constructed |
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300 | |||
301 | movzx esi, [edx + IPv4_header.VersionAndIHL] ; Calculate Header length by using IHL field |
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302 | and esi, 0x0000000f ; |
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303 | shl esi, 2 ; |
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304 | |||
305 | movzx ecx, [edx + IPv4_header.TotalLength] ; Calculate length of encapsulated Packet |
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306 | xchg cl, ch ; |
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307 | sub ecx, esi ; |
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308 | |||
309 | lea edi, [edx + IPv4_header.SourceAddress] ; make edi ptr to source and dest IPv4 address |
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310 | mov al, [edx + IPv4_header.Protocol] |
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311 | add esi, edx ; make esi ptr to data |
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312 | |||
313 | cmp al, IP_PROTO_TCP |
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314 | je TCP_input |
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315 | |||
316 | cmp al, IP_PROTO_UDP |
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317 | je UDP_input |
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318 | |||
319 | cmp al, IP_PROTO_ICMP |
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320 | je ICMP_input |
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321 | |||
3556 | hidnplayr | 322 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: unknown protocol %u\n", al |
3545 | hidnplayr | 323 | |
324 | .dump: |
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3556 | hidnplayr | 325 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: dumping\n" |
4052 | hidnplayr | 326 | inc [IPv4_packets_dumped] ; FIXME: use correct interface |
3861 | hidnplayr | 327 | call NET_packet_free |
3545 | hidnplayr | 328 | add esp, 4 ; pop (balance stack) |
329 | ret |
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330 | |||
331 | |||
332 | ;--------------------------- |
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333 | ; Fragmented packet handler |
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334 | |||
335 | |||
336 | .has_fragments: |
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337 | movzx eax, [edx + IPv4_header.FlagsAndFragmentOffset] |
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338 | xchg al, ah |
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339 | shl ax, 3 |
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340 | |||
4258 | hidnplayr | 341 | 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 | 342 | |
343 | test ax, ax ; Is this the first packet of the fragment? |
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344 | jz .is_first_fragment |
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345 | |||
346 | |||
347 | ;------------------------------------------------------- |
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348 | ; We have a fragmented IP packet, but it's not the first |
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349 | |||
3556 | hidnplayr | 350 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Middle fragment packet received!\n" |
3545 | hidnplayr | 351 | |
352 | call IPv4_find_fragment_slot |
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353 | cmp esi, -1 |
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354 | je .dump |
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355 | |||
4052 | hidnplayr | 356 | mov [esi + IPv4_FRAGMENT_slot.ttl], 15 ; Reset the ttl |
357 | mov esi, [esi + IPv4_FRAGMENT_slot.ptr] |
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3545 | hidnplayr | 358 | or edi, -1 |
359 | .find_last_entry: ; The following routine will try to find the last entry |
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4052 | hidnplayr | 360 | cmp edi, [esi + IPv4_FRAGMENT_entry.PrevPtr] |
3545 | hidnplayr | 361 | jne .destroy_slot ; Damn, something screwed up, remove the whole slot (and free buffers too if possible!) |
362 | mov edi, esi |
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4052 | hidnplayr | 363 | mov esi, [esi + IPv4_FRAGMENT_entry.NextPtr] |
3545 | hidnplayr | 364 | cmp esi, -1 |
365 | jne .find_last_entry |
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366 | ; We found the last entry (pointer is now in edi) |
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367 | ; We are going to overwrite the ethernet header in received packet with a FRAGMENT_entry structure |
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368 | |||
369 | pop eax ; pointer to packet |
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4052 | hidnplayr | 370 | mov [edi + IPv4_FRAGMENT_entry.NextPtr], eax ; update pointer of previous entry to the new entry |
371 | mov [eax + IPv4_FRAGMENT_entry.NextPtr], -1 |
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372 | mov [eax + IPv4_FRAGMENT_entry.PrevPtr], edi |
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373 | mov [eax + IPv4_FRAGMENT_entry.Owner], ebx |
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3545 | hidnplayr | 374 | |
375 | add esp, 4 |
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376 | ret |
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377 | |||
378 | |||
379 | ;------------------------------------ |
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380 | ; We have received the first fragment |
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381 | |||
382 | .is_first_fragment: |
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3556 | hidnplayr | 383 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: First fragment packet received!\n" |
3545 | hidnplayr | 384 | ; try to locate a free slot.. |
4052 | hidnplayr | 385 | mov ecx, IPv4_MAX_FRAGMENTS |
386 | mov esi, IPv4_FRAGMENT_LIST |
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3545 | hidnplayr | 387 | .find_free_slot: |
4052 | hidnplayr | 388 | cmp word [esi + IPv4_FRAGMENT_slot.ttl], 0 |
3545 | hidnplayr | 389 | je .found_free_slot |
4052 | hidnplayr | 390 | add esi, sizeof.IPv4_FRAGMENT_slot |
3545 | hidnplayr | 391 | loop .find_free_slot |
392 | jmp .dump ; If no free slot was found, dump the packet |
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393 | |||
394 | .found_free_slot: ; We found a free slot, let's fill in the FRAGMENT_slot structure |
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4052 | hidnplayr | 395 | mov [esi + IPv4_FRAGMENT_slot.ttl], 15 ; RFC recommends 15 secs as ttl |
3545 | hidnplayr | 396 | mov ax, [edx + IPv4_header.Identification] |
4052 | hidnplayr | 397 | mov [esi + IPv4_FRAGMENT_slot.id], ax |
3545 | hidnplayr | 398 | mov eax, [edx + IPv4_header.SourceAddress] |
4052 | hidnplayr | 399 | mov [esi + IPv4_FRAGMENT_slot.SrcIP], eax |
3545 | hidnplayr | 400 | mov eax, [edx + IPv4_header.DestinationAddress] |
4052 | hidnplayr | 401 | mov [esi + IPv4_FRAGMENT_slot.DstIP], eax |
3545 | hidnplayr | 402 | pop eax |
4052 | hidnplayr | 403 | mov [esi + IPv4_FRAGMENT_slot.ptr], eax |
3545 | hidnplayr | 404 | ; Now, replace ethernet header in original buffer with a FRAGMENT_entry structure |
4052 | hidnplayr | 405 | mov [eax + IPv4_FRAGMENT_entry.NextPtr], -1 |
406 | mov [eax + IPv4_FRAGMENT_entry.PrevPtr], -1 |
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407 | mov [eax + IPv4_FRAGMENT_entry.Owner], ebx |
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3545 | hidnplayr | 408 | |
409 | add esp, 4 ; balance stack and exit |
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410 | ret |
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411 | |||
412 | |||
413 | ;----------------------------------- |
||
414 | ; We have received the last fragment |
||
415 | |||
416 | .is_last_fragment: |
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3556 | hidnplayr | 417 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Last fragment packet received!\n" |
3545 | hidnplayr | 418 | |
419 | call IPv4_find_fragment_slot |
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420 | cmp esi, -1 |
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421 | je .dump |
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422 | |||
4052 | hidnplayr | 423 | 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 | 424 | push esi |
425 | xor eax, eax |
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426 | or edi, -1 |
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427 | |||
428 | .count_bytes: |
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4052 | hidnplayr | 429 | cmp [esi + IPv4_FRAGMENT_entry.PrevPtr], edi |
430 | jne .destroy_slot_pop ; Damn, something screwed up, remove the whole slot (and free buffers too if possible!) |
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431 | mov cx, [esi + sizeof.IPv4_FRAGMENT_entry + IPv4_header.TotalLength] ; Add total length |
||
3545 | hidnplayr | 432 | xchg cl, ch |
3556 | hidnplayr | 433 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Packet size=%u\n", cx |
3545 | hidnplayr | 434 | add ax, cx |
4052 | hidnplayr | 435 | movzx cx, [esi + sizeof.IPv4_FRAGMENT_entry + IPv4_header.VersionAndIHL] ; Sub Header length |
3545 | hidnplayr | 436 | and cx, 0x000F |
437 | shl cx, 2 |
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3556 | hidnplayr | 438 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Header size=%u\n", cx |
3545 | hidnplayr | 439 | sub ax, cx |
440 | mov edi, esi |
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4052 | hidnplayr | 441 | mov esi, [esi + IPv4_FRAGMENT_entry.NextPtr] |
3545 | hidnplayr | 442 | cmp esi, -1 |
443 | jne .count_bytes |
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444 | |||
445 | mov esi, [esp+4] |
||
4052 | hidnplayr | 446 | mov [edi + IPv4_FRAGMENT_entry.NextPtr], esi ; Add this packet to the chain, this simplifies the following code |
447 | mov [esi + IPv4_FRAGMENT_entry.NextPtr], -1 |
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448 | mov [esi + IPv4_FRAGMENT_entry.PrevPtr], edi |
||
449 | mov [esi + IPv4_FRAGMENT_entry.Owner], ebx |
||
3545 | hidnplayr | 450 | |
4052 | hidnplayr | 451 | mov cx, [edx + IPv4_header.TotalLength] ; Note: This time we dont substract Header length |
3545 | hidnplayr | 452 | xchg cl, ch |
3556 | hidnplayr | 453 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Packet size=%u\n", cx |
3545 | hidnplayr | 454 | add ax, cx |
3556 | hidnplayr | 455 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Total Received data size=%u\n", eax |
3545 | hidnplayr | 456 | |
457 | push eax |
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458 | mov ax, [edx + IPv4_header.FlagsAndFragmentOffset] |
||
459 | xchg al, ah |
||
460 | shl ax, 3 |
||
461 | add cx, ax |
||
462 | pop eax |
||
3556 | hidnplayr | 463 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Total Fragment size=%u\n", ecx |
3545 | hidnplayr | 464 | |
465 | cmp ax, cx |
||
466 | jne .destroy_slot_pop |
||
467 | |||
468 | push eax |
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469 | push eax |
||
470 | call kernel_alloc |
||
471 | test eax, eax |
||
472 | je .destroy_slot_pop ; If we dont have enough space to allocate the buffer, discard all packets in slot |
||
473 | mov edx, [esp+4] ; Get pointer to first fragment entry back in edx |
||
474 | |||
475 | .rebuild_packet_loop: |
||
4052 | hidnplayr | 476 | movzx ecx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.FlagsAndFragmentOffset] ; Calculate the fragment offset |
3545 | hidnplayr | 477 | xchg cl, ch ; intel byte order |
478 | shl cx, 3 ; multiply by 8 and clear first 3 bits |
||
3556 | hidnplayr | 479 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Fragment offset=%u\n", cx |
3545 | hidnplayr | 480 | |
481 | lea edi, [eax + ecx] ; Notice that edi will be equal to eax for first fragment |
||
4258 | hidnplayr | 482 | movzx ebx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.VersionAndIHL] ; Find header size (in ebx) of fragment |
3545 | hidnplayr | 483 | and bx, 0x000F ; |
484 | shl bx, 2 ; |
||
485 | |||
4258 | hidnplayr | 486 | lea esi, [edx + sizeof.IPv4_FRAGMENT_entry] ; Set esi to the correct begin of fragment |
487 | movzx ecx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.TotalLength] ; Calculate total length of fragment |
||
3545 | hidnplayr | 488 | xchg cl, ch ; intel byte order |
489 | |||
490 | cmp edi, eax ; Is this packet the first fragment ? |
||
491 | je .first_fragment |
||
492 | sub cx, bx ; If not, dont copy the header |
||
493 | add esi, ebx ; |
||
494 | .first_fragment: |
||
495 | |||
4258 | hidnplayr | 496 | |
497 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Copying %u bytes from 0x%x to 0x%x\n", ecx, esi, edi |
||
3545 | hidnplayr | 498 | push cx ; First copy dword-wise, then byte-wise |
499 | shr cx, 2 ; |
||
3711 | clevermous | 500 | rep movsd ; |
3545 | hidnplayr | 501 | pop cx ; |
502 | and cx, 3 ; |
||
3711 | clevermous | 503 | rep movsb ; |
3545 | hidnplayr | 504 | |
505 | push eax |
||
4259 | hidnplayr | 506 | push [edx + IPv4_FRAGMENT_entry.Owner] ; we need to remeber the owner, in case this is the last packet |
507 | push [edx + IPv4_FRAGMENT_entry.NextPtr] ; Set edx to the next pointer |
||
3545 | hidnplayr | 508 | push edx ; Push pointer to fragment onto stack |
4258 | hidnplayr | 509 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Next Fragment: 0x%x\n", edx |
3861 | hidnplayr | 510 | call NET_packet_free ; free the previous fragment buffer (this uses the value from stack) |
4258 | hidnplayr | 511 | pop edx ebx eax |
3545 | hidnplayr | 512 | cmp edx, -1 ; Check if it is last fragment in chain |
513 | jne .rebuild_packet_loop |
||
514 | |||
515 | pop ecx |
||
516 | xchg cl, ch |
||
517 | mov edx, eax |
||
518 | mov [edx + IPv4_header.TotalLength], cx |
||
4259 | hidnplayr | 519 | add esp, 12 |
3545 | hidnplayr | 520 | xchg cl, ch |
4259 | hidnplayr | 521 | push ecx edx ; size and pointer |
522 | jmp .handle_it ; edx = buf ptr, ecx = size, [esp] buf ptr, [esp+4], total size, ebx=device ptr |
||
3545 | hidnplayr | 523 | |
524 | .destroy_slot_pop: |
||
525 | add esp, 4 |
||
526 | .destroy_slot: |
||
3556 | hidnplayr | 527 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Destroy fragment slot!\n" |
3545 | hidnplayr | 528 | ; TODO! |
529 | jmp .dump |
||
530 | |||
531 | |||
532 | |||
533 | |||
534 | |||
535 | ;----------------------------------------------------------------- |
||
536 | ; |
||
537 | ; find fragment slot |
||
538 | ; |
||
539 | ; IN: pointer to fragmented packet in edx |
||
540 | ; OUT: pointer to slot in esi, -1 on error |
||
541 | ; |
||
542 | ;----------------------------------------------------------------- |
||
543 | align 4 |
||
544 | IPv4_find_fragment_slot: |
||
545 | |||
546 | ;;; TODO: the RFC says we should check protocol number too |
||
547 | |||
548 | push eax ebx ecx edx |
||
549 | mov ax, [edx + IPv4_header.Identification] |
||
4052 | hidnplayr | 550 | mov ecx, IPv4_MAX_FRAGMENTS |
551 | mov esi, IPv4_FRAGMENT_LIST |
||
3545 | hidnplayr | 552 | mov ebx, [edx + IPv4_header.SourceAddress] |
553 | mov edx, [edx + IPv4_header.DestinationAddress] |
||
554 | .find_slot: |
||
4052 | hidnplayr | 555 | cmp [esi + IPv4_FRAGMENT_slot.id], ax |
3545 | hidnplayr | 556 | jne .try_next |
4052 | hidnplayr | 557 | cmp [esi + IPv4_FRAGMENT_slot.SrcIP], ebx |
3545 | hidnplayr | 558 | jne .try_next |
4052 | hidnplayr | 559 | cmp [esi + IPv4_FRAGMENT_slot.DstIP], edx |
3545 | hidnplayr | 560 | je .found_slot |
561 | .try_next: |
||
4052 | hidnplayr | 562 | add esi, sizeof.IPv4_FRAGMENT_slot |
3545 | hidnplayr | 563 | loop .find_slot |
564 | |||
565 | or esi, -1 |
||
566 | .found_slot: |
||
567 | pop edx ecx ebx eax |
||
568 | ret |
||
569 | |||
570 | |||
571 | ;------------------------------------------------------------------ |
||
572 | ; |
||
573 | ; IPv4_output |
||
574 | ; |
||
4052 | hidnplayr | 575 | ; IN: eax = Destination IP |
576 | ; ecx = data length |
||
577 | ; edx = Source IP |
||
578 | ; di = TTL shl 8 + protocol |
||
3545 | hidnplayr | 579 | ; |
4052 | hidnplayr | 580 | ; OUT: eax = pointer to buffer start |
581 | ; ebx = pointer to device struct (needed for sending procedure) |
||
582 | ; ecx = unchanged (packet size of embedded data) |
||
583 | ; edx = size of complete buffer |
||
584 | ; edi = pointer to start of data (0 on error) |
||
3545 | hidnplayr | 585 | ; |
586 | ;------------------------------------------------------------------ |
||
587 | align 4 |
||
588 | IPv4_output: |
||
589 | |||
3601 | hidnplayr | 590 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output: size=%u ip=0x%x\n", ecx, eax |
3545 | hidnplayr | 591 | |
592 | cmp ecx, 65500 ; Max IPv4 packet size |
||
593 | ja .too_large |
||
594 | |||
4052 | hidnplayr | 595 | push ecx di eax |
596 | call IPv4_route ; outputs device number in edi, dest ip in eax, source IP in edx |
||
597 | push edx |
||
3545 | hidnplayr | 598 | |
3610 | hidnplayr | 599 | test edi, edi |
600 | jz .loopback |
||
601 | |||
3545 | hidnplayr | 602 | call ARP_IP_to_MAC |
603 | test eax, 0xffff0000 ; error bits |
||
604 | jnz .arp_error |
||
605 | push ebx ; push the mac onto the stack |
||
606 | push ax |
||
607 | |||
4052 | hidnplayr | 608 | inc [IPv4_packets_tx + edi] ; update stats |
3545 | hidnplayr | 609 | |
3638 | hidnplayr | 610 | mov ebx, [NET_DRV_LIST + edi] |
3545 | hidnplayr | 611 | lea eax, [ebx + ETH_DEVICE.mac] |
612 | mov edx, esp |
||
4052 | hidnplayr | 613 | mov ecx, [esp + 6 + 8 + 2] |
3545 | hidnplayr | 614 | add ecx, sizeof.IPv4_header |
3600 | hidnplayr | 615 | mov di, ETHER_PROTO_IPv4 |
3545 | hidnplayr | 616 | call ETH_output |
617 | jz .eth_error |
||
618 | add esp, 6 ; pop the mac out of the stack |
||
619 | |||
620 | .continue: |
||
621 | xchg cl, ch ; internet byte order |
||
622 | mov [edi + IPv4_header.VersionAndIHL], 0x45 ; IPv4, normal length (no Optional header) |
||
623 | mov [edi + IPv4_header.TypeOfService], 0 ; nothing special, just plain ip packet |
||
624 | mov [edi + IPv4_header.TotalLength], cx |
||
625 | mov [edi + IPv4_header.Identification], 0 ; fragment id: FIXME |
||
626 | mov [edi + IPv4_header.FlagsAndFragmentOffset], 0 |
||
4052 | hidnplayr | 627 | |
3545 | hidnplayr | 628 | mov [edi + IPv4_header.HeaderChecksum], 0 |
629 | popd [edi + IPv4_header.SourceAddress] |
||
630 | popd [edi + IPv4_header.DestinationAddress] |
||
631 | |||
4052 | hidnplayr | 632 | pop word[edi + IPv4_header.TimeToLive] ; ttl shl 8 + protocol |
633 | ; [edi + IPv4_header.Protocol] |
||
634 | |||
3545 | hidnplayr | 635 | pop ecx |
636 | |||
637 | IPv4_checksum edi |
||
638 | add edi, sizeof.IPv4_header |
||
3556 | hidnplayr | 639 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output: success!\n" |
3545 | hidnplayr | 640 | ret |
641 | |||
642 | .eth_error: |
||
3603 | hidnplayr | 643 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: ethernet error\n" |
3545 | hidnplayr | 644 | add esp, 3*4+2+6 |
645 | xor edi, edi |
||
646 | ret |
||
647 | |||
648 | .arp_error: |
||
3603 | hidnplayr | 649 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: ARP error=%x\n", eax |
3545 | hidnplayr | 650 | add esp, 3*4+2 |
651 | xor edi, edi |
||
652 | ret |
||
653 | |||
654 | .too_large: |
||
3556 | hidnplayr | 655 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: Packet too large!\n" |
3545 | hidnplayr | 656 | xor edi, edi |
657 | ret |
||
658 | |||
659 | .loopback: |
||
3610 | hidnplayr | 660 | mov dword [esp + 2], eax ; change source IP to dest IP |
661 | mov ecx, [esp + 10] |
||
3545 | hidnplayr | 662 | add ecx, sizeof.IPv4_header |
3600 | hidnplayr | 663 | mov edi, AF_INET4 |
3545 | hidnplayr | 664 | call LOOP_output |
665 | jmp .continue |
||
666 | |||
667 | |||
668 | |||
669 | |||
670 | ;------------------------------------------------------------------ |
||
671 | ; |
||
672 | ; IPv4_output_raw |
||
673 | ; |
||
674 | ; IN: eax = socket ptr |
||
675 | ; ecx = data length |
||
676 | ; esi = data ptr |
||
677 | ; |
||
678 | ; OUT: / |
||
679 | ; |
||
680 | ;------------------------------------------------------------------ |
||
681 | align 4 |
||
682 | IPv4_output_raw: |
||
683 | |||
684 | DEBUGF 1,"IPv4_output_raw: size=%u ptr=%x socket=%x\n", ecx, esi, eax |
||
685 | |||
686 | cmp ecx, 1480 ;;;;; FIXME |
||
687 | ja .too_large |
||
688 | |||
689 | sub esp, 8 |
||
690 | push esi eax |
||
691 | |||
692 | call IPv4_route |
||
693 | call ARP_IP_to_MAC |
||
694 | |||
695 | test eax, 0xffff0000 ; error bits |
||
696 | jnz .arp_error |
||
697 | |||
698 | push ebx ; push the mac |
||
699 | push ax |
||
700 | |||
4052 | hidnplayr | 701 | inc [IPv4_packets_tx + 4*edi] |
3601 | hidnplayr | 702 | mov ebx, [NET_DRV_LIST + 4*edi] |
3545 | hidnplayr | 703 | lea eax, [ebx + ETH_DEVICE.mac] |
704 | mov edx, esp |
||
705 | mov ecx, [esp + 6 + 4] |
||
706 | add ecx, sizeof.IPv4_header |
||
3600 | hidnplayr | 707 | mov di, ETHER_PROTO_IPv4 |
3545 | hidnplayr | 708 | call ETH_output |
709 | jz .error |
||
710 | |||
711 | add esp, 6 ; pop the mac |
||
712 | |||
713 | mov dword[esp+4+4], edx |
||
714 | mov dword[esp+4+4+4], eax |
||
715 | |||
716 | pop eax esi |
||
717 | ;; todo: check socket options if we should add header, or just compute checksum |
||
718 | |||
719 | push edi ecx |
||
3711 | clevermous | 720 | rep movsb |
3545 | hidnplayr | 721 | pop ecx edi |
722 | |||
723 | ; [edi + IPv4_header.VersionAndIHL] ; IPv4, normal length (no Optional header) |
||
724 | ; [edi + IPv4_header.TypeOfService] ; nothing special, just plain ip packet |
||
725 | ; [edi + IPv4_header.TotalLength] |
||
726 | ; [edi + IPv4_header.TotalLength] ; internet byte order |
||
727 | ; [edi + IPv4_header.FlagsAndFragmentOffset] |
||
728 | |||
729 | mov [edi + IPv4_header.HeaderChecksum], 0 |
||
730 | |||
731 | ; [edi + IPv4_header.TimeToLive] ; ttl shl 8 + protocol |
||
732 | ; [edi + IPv4_header.Protocol] |
||
733 | ; [edi + IPv4_header.Identification] ; fragment id |
||
734 | ; [edi + IPv4_header.SourceAddress] |
||
735 | ; [edi + IPv4_header.DestinationAddress] |
||
736 | |||
737 | IPv4_checksum edi ;;;; todo: checksum for IP packet with options! |
||
738 | add edi, sizeof.IPv4_header |
||
3556 | hidnplayr | 739 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output_raw: device=%x\n", ebx |
3545 | hidnplayr | 740 | call [ebx + NET_DEVICE.transmit] |
741 | ret |
||
742 | |||
743 | .error: |
||
744 | add esp, 6 |
||
745 | .arp_error: |
||
746 | add esp, 8+4+4 |
||
747 | .too_large: |
||
3556 | hidnplayr | 748 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output_raw: Failed\n" |
3545 | hidnplayr | 749 | sub edi, edi |
750 | ret |
||
751 | |||
752 | |||
753 | ;-------------------------------------------------------- |
||
754 | ; |
||
755 | ; |
||
756 | ; IN: dword [esp] = pointer to buffer containing ipv4 packet to be fragmented |
||
757 | ; dword [esp+4] = buffer size |
||
758 | ; esi = pointer to ip header in that buffer |
||
759 | ; ecx = max size of fragments |
||
760 | ; |
||
761 | ; OUT: / |
||
762 | ; |
||
763 | ;-------------------------------------------------------- |
||
764 | |||
765 | align 4 |
||
766 | IPv4_fragment: |
||
767 | |||
3556 | hidnplayr | 768 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_fragment\n" |
3545 | hidnplayr | 769 | |
770 | and ecx, not 111b ; align 4 |
||
771 | |||
772 | cmp ecx, sizeof.IPv4_header + 8 ; must be able to put at least 8 bytes |
||
773 | jb .err2 |
||
774 | |||
775 | push esi ecx |
||
776 | mov eax, [esi + IPv4_header.DestinationAddress] |
||
777 | call ARP_IP_to_MAC |
||
778 | pop ecx esi |
||
779 | cmp eax, -1 |
||
780 | jz .err2 |
||
781 | |||
782 | push ebx |
||
783 | push ax |
||
784 | |||
785 | mov ebx, [NET_DRV_LIST] |
||
786 | lea eax, [ebx + ETH_DEVICE.mac] |
||
787 | push eax |
||
788 | |||
789 | |||
790 | push esi ; ptr to ip header |
||
791 | sub ecx, sizeof.IPv4_header ; substract header size |
||
792 | push ecx ; max data size |
||
793 | push dword 0 ; offset |
||
794 | |||
795 | .new_fragment: |
||
3556 | hidnplayr | 796 | DEBUGF DEBUG_NETWORK_VERBOSE, "Ipv4_fragment: new fragment" |
3545 | hidnplayr | 797 | |
798 | |||
799 | mov eax, [esp + 3*4] |
||
800 | lea ebx, [esp + 4*4] |
||
3600 | hidnplayr | 801 | mov di , ETHER_PROTO_IPv4 |
3545 | hidnplayr | 802 | call ETH_output |
803 | |||
804 | cmp edi, -1 |
||
805 | jz .err |
||
806 | |||
807 | ; copy header |
||
808 | mov esi, [esp + 2*4] |
||
809 | mov ecx, 5 ; 5 dwords: TODO: use IHL field of the header! |
||
3711 | clevermous | 810 | rep movsd |
3545 | hidnplayr | 811 | |
812 | ; copy data |
||
813 | mov esi, [esp + 2*4] |
||
814 | add esi, sizeof.IPv4_header |
||
815 | add esi, [esp] ; offset |
||
816 | |||
817 | mov ecx, [esp + 1*4] |
||
3556 | hidnplayr | 818 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_fragment: copying %u bytes\n", ecx |
3711 | clevermous | 819 | rep movsb |
3545 | hidnplayr | 820 | |
821 | ; now, correct header |
||
822 | mov ecx, [esp + 1*4] |
||
823 | add ecx, sizeof.IPv4_header |
||
824 | xchg cl, ch |
||
825 | mov [edi + IPv4_header.TotalLength], cx |
||
826 | |||
827 | mov ecx, [esp] ; offset |
||
828 | xchg cl, ch |
||
829 | |||
830 | ; cmp dword[esp + 4*4], 0 ; last fragment?;<<<<<< |
||
831 | ; je .last_fragment |
||
832 | or cx, 1 shl 2 ; more fragments |
||
833 | ; .last_fragment: |
||
834 | mov [edi + IPv4_header.FlagsAndFragmentOffset], cx |
||
835 | |||
836 | mov [edi + IPv4_header.HeaderChecksum], 0 |
||
837 | |||
838 | ;<<<<<<<<<<<<<<<<<<<<<<<<<<<<< send the packet |
||
839 | mov ecx, [esp + 1*4] |
||
840 | |||
841 | push edx eax |
||
842 | IPv4_checksum edi |
||
843 | |||
844 | call [ebx + NET_DEVICE.transmit] |
||
845 | ;<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
||
846 | |||
3711 | clevermous | 847 | mov ecx, [esp+4] |
3545 | hidnplayr | 848 | add [esp], ecx |
849 | |||
850 | mov ecx, [esp+3*4+6+4] ; ptr to begin of buff |
||
851 | add ecx, [esp+3*4+6+4+4] ; buff size |
||
852 | sub ecx, [esp+2*4] ; ptr to ip header |
||
853 | add ecx, [esp] ; offset |
||
854 | |||
3556 | hidnplayr | 855 | DEBUGF DEBUG_NETWORK_VERBOSE, "Ipv4_fragment: %u bytes remaining\n", ecx |
3545 | hidnplayr | 856 | |
857 | cmp ecx, [esp+1*4] |
||
858 | jae .new_fragment |
||
859 | |||
860 | mov [esp+4], ecx ; set fragment size to remaining packet size |
||
861 | jmp .new_fragment |
||
862 | |||
863 | .err: |
||
3556 | hidnplayr | 864 | DEBUGF DEBUG_NETWORK_ERROR, "Ipv4_fragment: failed\n" |
3545 | hidnplayr | 865 | .done: |
866 | add esp, 12 + 4 + 6 |
||
867 | .err2: |
||
3556 | hidnplayr | 868 | DEBUGF DEBUG_NETWORK_VERBOSE, "Ipv4_fragment: dumping\n" |
3861 | hidnplayr | 869 | call NET_packet_free |
3545 | hidnplayr | 870 | add esp, 4 |
871 | |||
872 | ret |
||
873 | |||
874 | |||
875 | |||
876 | ;--------------------------------------------------------------------------- |
||
877 | ; |
||
878 | ; IPv4_route |
||
879 | ; |
||
880 | ; IN: eax = Destination IP |
||
4052 | hidnplayr | 881 | ; edx = Source IP |
882 | ; OUT: eax = Destination IP (or gateway IP) |
||
883 | ; edx = Source IP |
||
884 | ; edi = device number*4 |
||
885 | ; DESTROYED: |
||
886 | ; ecx |
||
3545 | hidnplayr | 887 | ; |
888 | ;--------------------------------------------------------------------------- |
||
889 | align 4 |
||
4052 | hidnplayr | 890 | IPv4_route: ; TODO: return error if no valid route found |
3545 | hidnplayr | 891 | |
892 | cmp eax, 0xffffffff |
||
893 | je .broadcast |
||
894 | |||
895 | xor edi, edi |
||
896 | .loop: |
||
4052 | hidnplayr | 897 | mov ebx, [IP_LIST + edi] |
898 | and ebx, [SUBNET_LIST + edi] |
||
3545 | hidnplayr | 899 | jz .next |
4052 | hidnplayr | 900 | mov ecx, eax |
901 | and ecx, [SUBNET_LIST + edi] |
||
902 | cmp ebx, ecx |
||
903 | je .got_it |
||
3545 | hidnplayr | 904 | .next: |
905 | add edi, 4 |
||
4052 | hidnplayr | 906 | cmp edi, 4*NET_DEVICES_MAX |
907 | jb .loop |
||
3545 | hidnplayr | 908 | |
4052 | hidnplayr | 909 | mov eax, [GATEWAY_LIST + 4] ; TODO: let user (or a user space daemon) configure default route |
3545 | hidnplayr | 910 | .broadcast: |
4052 | hidnplayr | 911 | mov edi, 4 ; TODO: same as above |
912 | .got_it: |
||
913 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_route: %u\n", edi |
||
914 | test edx, edx |
||
915 | jnz @f |
||
916 | mov edx, [IP_LIST + edi] |
||
917 | @@: |
||
918 | |||
3545 | hidnplayr | 919 | ret |
920 | |||
921 | |||
922 | |||
923 | ;--------------------------------------------------------------------------- |
||
924 | ; |
||
925 | ; IPv4_get_frgmnt_num |
||
926 | ; |
||
927 | ; IN: / |
||
928 | ; OUT: fragment number in ax |
||
929 | ; |
||
930 | ;--------------------------------------------------------------------------- |
||
931 | align 4 |
||
932 | IPv4_get_frgmnt_num: |
||
933 | xor ax, ax ;;; TODO: replace this with real code |
||
934 | |||
935 | ret |
||
936 | |||
937 | |||
4030 | hidnplayr | 938 | ;----------------------------------------------------------------- |
939 | ; |
||
940 | ; IPv4_connect |
||
941 | ; |
||
942 | ; IN: eax = socket pointer |
||
943 | ; OUT: eax = 0 ok / -1 error |
||
944 | ; ebx = error code |
||
945 | ; |
||
946 | ;------------------------- |
||
947 | align 4 |
||
948 | IPv4_connect: |
||
949 | |||
4035 | hidnplayr | 950 | push eax edx |
4030 | hidnplayr | 951 | lea ecx, [eax + SOCKET.mutex] |
952 | call mutex_lock |
||
4035 | hidnplayr | 953 | pop edx eax |
4030 | hidnplayr | 954 | |
955 | ; Fill in local IP |
||
956 | cmp [eax + IP_SOCKET.LocalIP], 0 |
||
957 | jne @f |
||
958 | push [IP_LIST + 4] ; FIXME: use correct local IP |
||
959 | pop [eax + IP_SOCKET.LocalIP] |
||
960 | |||
961 | ; Fill in remote IP |
||
962 | pushd [edx + 4] |
||
963 | pop [eax + IP_SOCKET.RemoteIP] |
||
964 | |||
4035 | hidnplayr | 965 | ; Set up data receiving queue |
4030 | hidnplayr | 966 | push eax |
4035 | hidnplayr | 967 | init_queue (eax + SOCKET_QUEUE_LOCATION) |
4030 | hidnplayr | 968 | pop eax |
969 | |||
970 | lea ecx, [eax + SOCKET.mutex] |
||
971 | call mutex_unlock |
||
972 | |||
973 | xor eax, eax |
||
974 | ret |
||
975 | |||
976 | |||
3545 | hidnplayr | 977 | ;--------------------------------------------------------------------------- |
978 | ; |
||
979 | ; IPv4_API |
||
980 | ; |
||
981 | ; This function is called by system function 75 |
||
982 | ; |
||
983 | ; IN: subfunction number in bl |
||
984 | ; device number in bh |
||
985 | ; ecx, edx, .. depends on subfunction |
||
986 | ; |
||
987 | ; OUT: |
||
988 | ; |
||
989 | ;--------------------------------------------------------------------------- |
||
990 | align 4 |
||
991 | IPv4_api: |
||
992 | |||
993 | movzx eax, bh |
||
994 | shl eax, 2 |
||
995 | |||
996 | and ebx, 0x000000ff |
||
997 | cmp ebx, .number |
||
998 | ja .error |
||
999 | jmp dword [.table + 4*ebx] |
||
1000 | |||
1001 | .table: |
||
1002 | dd .packets_tx ; 0 |
||
1003 | dd .packets_rx ; 1 |
||
1004 | dd .read_ip ; 2 |
||
1005 | dd .write_ip ; 3 |
||
1006 | dd .read_dns ; 4 |
||
1007 | dd .write_dns ; 5 |
||
1008 | dd .read_subnet ; 6 |
||
1009 | dd .write_subnet ; 7 |
||
1010 | dd .read_gateway ; 8 |
||
1011 | dd .write_gateway ; 9 |
||
1012 | .number = ($ - .table) / 4 - 1 |
||
1013 | |||
1014 | .error: |
||
1015 | mov eax, -1 |
||
1016 | ret |
||
1017 | |||
1018 | .packets_tx: |
||
4052 | hidnplayr | 1019 | mov eax, [IPv4_packets_tx + eax] |
3545 | hidnplayr | 1020 | ret |
1021 | |||
1022 | .packets_rx: |
||
4052 | hidnplayr | 1023 | mov eax, [IPv4_packets_rx + eax] |
3545 | hidnplayr | 1024 | ret |
1025 | |||
1026 | .read_ip: |
||
1027 | mov eax, [IP_LIST + eax] |
||
1028 | ret |
||
1029 | |||
1030 | .write_ip: |
||
1031 | mov [IP_LIST + eax], ecx |
||
1032 | mov edi, eax ; device number, we'll need it for ARP |
||
1033 | |||
1034 | ; pre-calculate the local broadcast address |
||
1035 | mov ebx, [SUBNET_LIST + eax] |
||
1036 | not ebx |
||
1037 | or ebx, ecx |
||
1038 | mov [BROADCAST_LIST + eax], ebx |
||
1039 | |||
3601 | hidnplayr | 1040 | mov ebx, [NET_DRV_LIST + eax] |
1041 | mov eax, [IP_LIST + eax] |
||
3545 | hidnplayr | 1042 | call ARP_output_request ; now send a gratuitous ARP |
1043 | |||
1044 | call NET_send_event |
||
1045 | xor eax, eax |
||
1046 | ret |
||
1047 | |||
1048 | .read_dns: |
||
1049 | mov eax, [DNS_LIST + eax] |
||
1050 | ret |
||
1051 | |||
1052 | .write_dns: |
||
1053 | mov [DNS_LIST + eax], ecx |
||
1054 | call NET_send_event |
||
1055 | xor eax, eax |
||
1056 | ret |
||
1057 | |||
1058 | .read_subnet: |
||
1059 | mov eax, [SUBNET_LIST + eax] |
||
1060 | ret |
||
1061 | |||
1062 | .write_subnet: |
||
1063 | mov [SUBNET_LIST + eax], ecx |
||
1064 | |||
1065 | ; pre-calculate the local broadcast address |
||
1066 | mov ebx, [IP_LIST + eax] |
||
1067 | not ecx |
||
1068 | or ecx, ebx |
||
1069 | mov [BROADCAST_LIST + eax], ecx |
||
1070 | |||
1071 | call NET_send_event |
||
1072 | xor eax, eax |
||
1073 | ret |
||
1074 | |||
1075 | .read_gateway: |
||
1076 | mov eax, [GATEWAY_LIST + eax] |
||
1077 | ret |
||
1078 | |||
1079 | .write_gateway: |
||
1080 | mov [GATEWAY_LIST + eax], ecx |
||
1081 | |||
1082 | call NET_send_event |
||
1083 | xor eax, eax |
||
1084 | ret |