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3545 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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5363 | yogev_ezra | 3 | ;; Copyright (C) KolibriOS team 2012-2015. All rights reserved. ;; |
3545 | hidnplayr | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;; IPv6.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 | ;; Written by hidnplayr@kolibrios.org ;; |
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11 | ;; ;; |
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12 | ;; GNU GENERAL PUBLIC LICENSE ;; |
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13 | ;; Version 2, June 1991 ;; |
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14 | ;; ;; |
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15 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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16 | |||
4850 | mario79 | 17 | $Revision: 5522 $ |
3545 | hidnplayr | 18 | |
19 | |||
20 | struct IPv6_header |
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21 | |||
22 | VersionTrafficFlow dd ? ; Version[0-3], Traffic class[4-11], Flow Label [12-31] |
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23 | PayloadLength dw ? ; 16 bits, unsigned length of payload (extension headers are part of this) |
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24 | NextHeader db ? ; Values are same as in IPv4 'Protocol' field |
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25 | HopLimit db ? ; Decremented by every node, packet is discarded when it reaches 0 |
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26 | SourceAddress rd 4 ; 128-bit addresses |
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27 | DestinationAddress rd 4 ; |
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28 | Payload rb 0 |
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29 | |||
30 | ends |
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31 | |||
32 | |||
3698 | hidnplayr | 33 | uglobal |
3545 | hidnplayr | 34 | align 4 |
35 | |||
36 | IPv6: |
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3600 | hidnplayr | 37 | .addresses rd 4*NET_DEVICES_MAX |
38 | .subnet rd 4*NET_DEVICES_MAX |
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39 | .dns rd 4*NET_DEVICES_MAX |
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40 | .gateway rd 4*NET_DEVICES_MAX |
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3545 | hidnplayr | 41 | |
3600 | hidnplayr | 42 | .packets_tx rd NET_DEVICES_MAX |
43 | .packets_rx rd NET_DEVICES_MAX |
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3545 | hidnplayr | 44 | |
45 | endg |
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46 | |||
47 | |||
48 | ;----------------------------------------------------------------- |
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49 | ; |
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50 | ; IPv6_init |
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51 | ; |
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52 | ; This function resets all IP variables |
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53 | ; |
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54 | ;----------------------------------------------------------------- |
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55 | macro IPv6_init { |
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56 | |||
57 | xor eax, eax |
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58 | mov edi, IPv6 |
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59 | mov ecx, (4*4*4+2*4)MAX_IP |
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3711 | clevermous | 60 | rep stosd |
3545 | hidnplayr | 61 | |
62 | } |
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63 | |||
64 | |||
65 | |||
66 | ;----------------------------------------------------------------- |
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67 | ; |
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68 | ; IPv6_input: |
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69 | ; |
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70 | ; Will check if IPv6 Packet isnt damaged |
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71 | ; and call appropriate handler. (TCP/UDP/ICMP/..) |
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72 | ; |
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73 | ; It will also re-construct fragmented packets |
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74 | ; |
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75 | ; IN: Pointer to buffer in [esp] |
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76 | ; size of buffer in [esp+4] |
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77 | ; pointer to device struct in ebx |
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78 | ; pointer to IPv6 header in edx |
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79 | ; size of IPv6 packet in ecx |
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80 | ; OUT: / |
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81 | ; |
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82 | ;----------------------------------------------------------------- |
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83 | align 4 |
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84 | IPv6_input: |
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85 | |||
3556 | hidnplayr | 86 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input from: %x%x:%x%x:%x%x:%x%x:%x%x:%x%x:%x%x:%x%x\n",\ |
3545 | hidnplayr | 87 | [edx + IPv6_header.SourceAddress + 0]:2,[edx + IPv6_header.SourceAddress + 1]:2,\ |
88 | [edx + IPv6_header.SourceAddress + 2]:2,[edx + IPv6_header.SourceAddress + 3]:2,\ |
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89 | [edx + IPv6_header.SourceAddress + 4]:2,[edx + IPv6_header.SourceAddress + 5]:2,\ |
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90 | [edx + IPv6_header.SourceAddress + 6]:2,[edx + IPv6_header.SourceAddress + 7]:2,\ |
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91 | [edx + IPv6_header.SourceAddress + 8]:2,[edx + IPv6_header.SourceAddress + 9]:2,\ |
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92 | [edx + IPv6_header.SourceAddress + 10]:2,[edx + IPv6_header.SourceAddress + 11]:2,\ |
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93 | [edx + IPv6_header.SourceAddress + 12]:2,[edx + IPv6_header.SourceAddress + 13]:2,\ |
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94 | [edx + IPv6_header.SourceAddress + 14]:2,[edx + IPv6_header.SourceAddress + 15]:2 |
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95 | |||
3556 | hidnplayr | 96 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input to: %x%x:%x%x:%x%x:%x%x:%x%x:%x%x:%x%x:%x%x\n",\ |
3545 | hidnplayr | 97 | [edx + IPv6_header.DestinationAddress + 0]:2,[edx + IPv6_header.DestinationAddress + 1]:2,\ |
98 | [edx + IPv6_header.DestinationAddress + 2]:2,[edx + IPv6_header.DestinationAddress + 3]:2,\ |
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99 | [edx + IPv6_header.DestinationAddress + 4]:2,[edx + IPv6_header.DestinationAddress + 5]:2,\ |
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100 | [edx + IPv6_header.DestinationAddress + 6]:2,[edx + IPv6_header.DestinationAddress + 7]:2,\ |
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101 | [edx + IPv6_header.DestinationAddress + 8]:2,[edx + IPv6_header.DestinationAddress + 9]:2,\ |
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102 | [edx + IPv6_header.DestinationAddress + 10]:2,[edx + IPv6_header.DestinationAddress + 11]:2,\ |
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103 | [edx + IPv6_header.DestinationAddress + 12]:2,[edx + IPv6_header.DestinationAddress + 13]:2,\ |
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104 | [edx + IPv6_header.DestinationAddress + 14]:2,[edx + IPv6_header.DestinationAddress + 15]:2 |
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105 | |||
106 | sub ecx, sizeof.IPv6_header |
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107 | jb .dump |
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108 | |||
109 | cmp cx, [edx + IPv6_header.PayloadLength] |
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110 | jb .dump |
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111 | |||
112 | ;------------------------------------------------------------------- |
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113 | ; No, it's just a regular IP packet, pass it to the higher protocols |
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114 | |||
115 | .handle_it: |
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116 | movzx ecx, [edx + IPv6_header.PayloadLength] |
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117 | lea edi, [edx + IPv6_header.SourceAddress] ; make edi ptr to source and dest IPv6 address |
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118 | lea esi, [edx + IPv6_header.Payload] ; make esi ptr to data |
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119 | mov al, [edx + IPv6_header.NextHeader] |
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120 | |||
121 | .scan: |
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122 | cmp al, 59 ; no next |
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123 | je .dump |
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124 | |||
125 | cmp al, 0 |
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126 | je .hop_by_hop |
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127 | |||
128 | cmp al, 43 |
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129 | je .routing |
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130 | |||
131 | cmp al, 44 |
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132 | je .fragment |
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133 | |||
134 | cmp al, 60 |
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135 | je .dest_opts |
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136 | |||
137 | ; cmp al, IP_PROTO_TCP |
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138 | ; je TCP_input |
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139 | |||
140 | ; cmp al, IP_PROTO_UDP |
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141 | ; je UDP_input |
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142 | |||
143 | ; cmp al, 58 |
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144 | ; je ICMP6_input |
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145 | |||
3556 | hidnplayr | 146 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - unknown protocol: %u\n", al |
3545 | hidnplayr | 147 | |
148 | .dump: |
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3556 | hidnplayr | 149 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - dumping\n" |
5522 | hidnplayr | 150 | call NET_BUFF_free |
3545 | hidnplayr | 151 | ret |
152 | |||
153 | .dump_options: |
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154 | add esp, 2+4+4 |
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155 | jmp .dump |
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156 | |||
157 | .nextheader: |
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158 | pop esi |
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159 | pop ecx |
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160 | pop ax |
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161 | jmp .scan |
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162 | |||
163 | ;------------------------- |
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164 | ; Hop-by-Hop |
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165 | |||
166 | .hop_by_hop: |
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3556 | hidnplayr | 167 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - hop by hop\n" |
3545 | hidnplayr | 168 | pushw [esi] ; 8 bit identifier for option type |
169 | movzx eax, byte[esi + 1] ; Hdr Ext Len |
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170 | inc eax ; first 8 octets not counted |
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171 | shl eax, 3 ; * 8 |
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172 | sub ecx, eax |
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173 | push ecx |
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174 | add eax, esi |
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175 | push eax |
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176 | inc esi |
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177 | inc esi |
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178 | |||
179 | mov al, [esi] |
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180 | |||
181 | cmp al, 0 |
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182 | je .pad_1 |
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183 | |||
184 | cmp al, 1 |
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185 | je .pad_n |
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186 | |||
187 | ; TODO: check with other known options |
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188 | |||
189 | ; unknown option.. discard packet or not? |
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190 | ; check highest two bits |
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191 | test al, 0xc0 ; discard packet |
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192 | jnz .dump_options |
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193 | |||
194 | .pad_n: |
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195 | movzx eax, byte[esi + 1] |
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3556 | hidnplayr | 196 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - pad %u\n", eax |
3545 | hidnplayr | 197 | inc esi |
198 | inc esi |
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199 | add esi, eax |
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200 | sub ecx, eax |
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201 | jmp .hop_by_hop |
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202 | |||
203 | .pad_1: |
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3556 | hidnplayr | 204 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - pad 1\n" |
3545 | hidnplayr | 205 | inc esi |
206 | dec ecx |
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207 | jmp .hop_by_hop |
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208 | |||
209 | |||
210 | |||
211 | .dest_opts: |
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3556 | hidnplayr | 212 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - dest opts\n" |
3545 | hidnplayr | 213 | jmp .nextheader |
214 | |||
215 | .routing: |
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3556 | hidnplayr | 216 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - routing\n" |
3545 | hidnplayr | 217 | pushw [esi] ; 8 bit identifier for option type |
218 | movzx eax, byte[esi + 1] ; Hdr Ext Len |
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219 | inc eax ; first 8 octets not counted |
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220 | shl eax, 3 ; * 8 |
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221 | sub ecx, eax |
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222 | push ecx |
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223 | add eax, esi |
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224 | push eax |
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225 | inc esi |
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226 | inc esi |
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227 | |||
228 | cmp al, 0 |
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229 | je .pad_1 |
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230 | |||
231 | cmp al, 1 |
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232 | je .pad_n |
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233 | |||
234 | mov al, [esi] ; routing type |
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235 | |||
236 | jmp .nextheader |
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237 | |||
238 | .fragment: |
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3556 | hidnplayr | 239 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv6_input - fragment\n" |
3545 | hidnplayr | 240 | |
241 | jmp .nextheader |
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242 | |||
243 | |||
244 | |||
245 | |||
246 | |||
247 | |||
248 | ;--------------------------------------------------------------------------- |
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249 | ; |
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250 | ; IPv6_API |
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251 | ; |
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252 | ; This function is called by system function 75 |
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253 | ; |
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254 | ; IN: subfunction number in bl |
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255 | ; device number in bh |
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256 | ; ecx, edx, .. depends on subfunction |
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257 | ; |
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258 | ; OUT: |
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259 | ; |
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260 | ;--------------------------------------------------------------------------- |
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261 | align 4 |
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262 | IPv6_api: |
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263 | |||
264 | movzx eax, bh |
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265 | shl eax, 2 |
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266 | |||
267 | and ebx, 0x000000ff |
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268 | cmp ebx, .number |
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269 | ja .error |
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270 | jmp dword [.table + 4*ebx] |
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271 | |||
272 | .table: |
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273 | dd .packets_tx ; 0 |
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274 | dd .packets_rx ; 1 |
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275 | ; dd .read_ip ; 2 |
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276 | ; dd .write_ip ; 3 |
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277 | ; dd .read_dns ; 4 |
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278 | ; dd .write_dns ; 5 |
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279 | ; dd .read_subnet ; 6 |
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280 | ; dd .write_subnet ; 7 |
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281 | ; dd .read_gateway ; 8 |
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282 | ; dd .write_gateway ; 9 |
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283 | .number = ($ - .table) / 4 - 1 |
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284 | |||
285 | .error: |
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286 | mov eax, -1 |
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287 | ret |
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288 | |||
289 | .packets_tx: |
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290 | mov eax, [IPv6.packets_tx + eax] |
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291 | ret |
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292 | |||
293 | .packets_rx: |
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294 | mov eax, [IPv6.packets_rx + eax] |
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295 | ret |
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296 |