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3545 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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5391 | hidnplayr | 3 | ;; Copyright (C) KolibriOS team 2010-2015. All rights reserved. ;; |
3545 | hidnplayr | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;; zeroconfig.asm - Zeroconfig service for KolibriOS ;; |
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7 | ;; ;; |
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8 | ;; Written by hidnplayr@kolibrios.org ;; |
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9 | ;; Some code contributed by Derpenguin ;; |
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10 | ;; ;; |
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11 | ;; DHCP code is based on that by Mike Hibbet ;; |
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3618 | hidnplayr | 12 | ;; (DHCP client for menuetos) ;; |
3545 | hidnplayr | 13 | ;; ;; |
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 | |||
19 | format binary as "" |
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20 | |||
21 | ; CONFIGURATION |
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22 | |||
3632 | hidnplayr | 23 | TIMEOUT = 3 ; in seconds |
3545 | hidnplayr | 24 | BUFFER = 1024 ; in bytes |
3632 | hidnplayr | 25 | DHCP_TRIES = 3 ; number of times to try contacting DHCP server |
3545 | hidnplayr | 26 | __DEBUG__ = 1 ; enable/disable |
3682 | hidnplayr | 27 | __DEBUG_LEVEL__ = 2 ; 1 = all, 2 = errors |
3545 | hidnplayr | 28 | |
29 | ; CONFIGURATION FOR LINK-LOCAL |
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30 | |||
31 | PROBE_WAIT = 1 ; second (initial random delay) |
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32 | PROBE_MIN = 1 ; second (minimum delay till repeated probe) |
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33 | PROBE_MAX = 2 ; seconds (maximum delay till repeated probe) |
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34 | PROBE_NUM = 3 ; (number of probe packets) |
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35 | |||
36 | ANNOUNCE_NUM = 2 ; (number of announcement packets) |
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37 | ANNOUNCE_INTERVAL = 2 ; seconds (time between announcement packets) |
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38 | ANNOUNCE_WAIT = 2 ; seconds (delay before announcing) |
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39 | |||
40 | MAX_CONFLICTS = 10 ; (max conflicts before rate limiting) |
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41 | |||
42 | RATE_LIMIT_INTERVAL = 60 ; seconds (delay between successive attempts) |
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43 | |||
44 | DEFEND_INTERVAL = 10 ; seconds (min. wait between defensive ARPs) |
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45 | |||
5586 | hidnplayr | 46 | MAX_INTERFACES = 8 |
47 | |||
3618 | hidnplayr | 48 | use32 |
49 | org 0x0 |
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3545 | hidnplayr | 50 | |
3618 | hidnplayr | 51 | db 'MENUET01' ; 8 byte id |
52 | dd 0x01 ; header version |
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53 | dd START ; start of code |
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54 | dd IM_END ; size of image |
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55 | dd (I_END+0x100) ; memory for app |
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56 | dd (I_END+0x100) ; esp |
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57 | dd 0, 0 ; I_Param, I_Path |
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58 | |||
59 | |||
60 | include '../../proc32.inc' |
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61 | include '../../macros.inc' |
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62 | include '../../debug-fdo.inc' |
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63 | include '../../network.inc' |
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3545 | hidnplayr | 64 | include 'dhcp.inc' |
3618 | hidnplayr | 65 | include '../../dll.inc' |
3545 | hidnplayr | 66 | |
5586 | hidnplayr | 67 | struct dhcp_msg |
68 | op db ? ; Operation Code |
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69 | htype db ? ; Hardware type |
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70 | hlen db ? ; Hardware address length |
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71 | hops db ? |
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72 | xid dd ? ; Transaction Identifier |
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73 | secs dw ? ; Seconds since boot |
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74 | flags dw ? |
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75 | ciaddr dd ? ; Client IP address |
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76 | yiaddr dd ? ; "Your" IP address |
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77 | siaddr dd ? ; Server IP address |
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78 | giaddr dd ? ; Gateway IP address |
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79 | chaddr rb 16 ; Client hardware address |
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80 | sname rb 64 ; Server name |
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81 | file rb 128 ; boot filename |
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82 | cookie dd ? ; Magic cookie (0x63538263) |
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83 | options rb 512 |
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84 | ends |
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85 | |||
86 | struct interface |
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87 | number dd ? |
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88 | state dd ? ; 0 - disconnected, 1 - connected |
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89 | mode dd ? ; 0 - static, 1 - dhcp, 2 - auto (zero config) |
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90 | tries dd ? |
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91 | lease dd ? |
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92 | ServerIP dd ? |
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93 | ip dd ? |
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94 | subnet dd ? |
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95 | dns dd ? |
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96 | gateway dd ? |
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97 | socketNum dd ? |
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98 | timeout dd ? |
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99 | ip_conflicts dd ? |
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100 | ends |
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101 | |||
5391 | hidnplayr | 102 | START: |
5586 | hidnplayr | 103 | mcall 68, 11 ; init heap |
3545 | hidnplayr | 104 | |
5586 | hidnplayr | 105 | stdcall dll.Load, @IMPORT ; load libraries |
5391 | hidnplayr | 106 | or eax, eax |
5586 | hidnplayr | 107 | jnz exit_immediately |
3545 | hidnplayr | 108 | |
5586 | hidnplayr | 109 | DEBUGF 2, "Zero-config service loaded\n" |
3545 | hidnplayr | 110 | |
5586 | hidnplayr | 111 | mcall 40, EVM_STACK2 ; We only want low-level network events |
3545 | hidnplayr | 112 | |
5586 | hidnplayr | 113 | ; Set up interface list |
114 | mov edi, device_list |
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115 | xor ebx, ebx |
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116 | @@: |
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117 | inc ebx |
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118 | mov eax, ebx |
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119 | stosd |
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120 | mov ecx, sizeof.interface/4-1 |
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121 | xor eax,eax |
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122 | rep stosd |
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123 | cmp ebx, MAX_INTERFACES |
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124 | jb @b |
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125 | |||
126 | mov ebp, device_list |
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127 | mainloop: |
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128 | cmp [ebp + interface.state], 0 |
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129 | je .link_up? |
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130 | jmp .maintain_link |
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131 | |||
132 | .next: |
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133 | cmp [ebp + interface.number], MAX_INTERFACES |
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134 | je .wait |
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135 | add ebp, sizeof.interface |
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136 | jmp mainloop |
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137 | |||
138 | .wait: |
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139 | mcall 10 ; Wait for event |
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140 | mov ebp, device_list |
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141 | jmp mainloop |
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142 | |||
143 | .link_up?: |
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144 | mov bh, byte[ebp + interface.number] |
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145 | mov bl, 0 ; Get device type |
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5391 | hidnplayr | 146 | mcall 74 |
5586 | hidnplayr | 147 | cmp eax, 1 ; Ethernet |
148 | jne mainloop.next |
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3545 | hidnplayr | 149 | |
5586 | hidnplayr | 150 | mov bl, 10 ; Get Link status |
5391 | hidnplayr | 151 | mcall 74 |
152 | test eax, eax |
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5586 | hidnplayr | 153 | jz mainloop.next |
3545 | hidnplayr | 154 | |
5586 | hidnplayr | 155 | mov [ebp + interface.state], 1 |
3545 | hidnplayr | 156 | |
5586 | hidnplayr | 157 | call create_str_ini_int |
158 | |||
159 | ; Try to read settings from .ini file |
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160 | invoke ini.get_str, ini_path, str_ini_int, str_ip_type, inibuf, 16, str_null |
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161 | test eax, eax |
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162 | jz @f |
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163 | ; If settings not found, use default settings from 'ip?' section |
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164 | mov dword[str_ini_int], 'ip?' |
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165 | @@: |
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166 | |||
5391 | hidnplayr | 167 | mov ebx, API_ETH + 0 |
5586 | hidnplayr | 168 | mov bh, byte[ebp + interface.number] |
169 | mcall 76 ; get MAC of the ethernet interface |
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170 | mov word[tx_msg.chaddr], bx |
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171 | mov dword[tx_msg.chaddr+2], eax |
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172 | DEBUGF 1, "MAC: %x-%x-%x-%x-%x-%x\n", \ |
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173 | [tx_msg.chaddr+0]:2, [tx_msg.chaddr+1]:2, [tx_msg.chaddr+2]:2, \ |
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174 | [tx_msg.chaddr+3]:2, [tx_msg.chaddr+4]:2, [tx_msg.chaddr+5]:2 |
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3545 | hidnplayr | 175 | |
5586 | hidnplayr | 176 | invoke ini.get_str, ini_path, str_ini_int, str_ip_type, inibuf, 16, str_null |
177 | test eax, eax |
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178 | jnz .fail |
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179 | mov eax, dword[inibuf] |
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180 | or eax, 0x20202020 |
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181 | mov [ebp + interface.mode], 0 |
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182 | cmp eax, 'stat' |
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5391 | hidnplayr | 183 | je static |
5586 | hidnplayr | 184 | mov [ebp + interface.mode], 1 |
185 | cmp eax, 'dhcp' |
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186 | je dhcp |
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187 | mov [ebp + interface.mode], 2 |
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188 | cmp eax, 'auto' |
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189 | je dhcp |
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3545 | hidnplayr | 190 | |
5586 | hidnplayr | 191 | .fail: |
192 | DEBUGF 2, "Invalid network.ini settings\n" |
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193 | mcall -1 ; Give up |
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3545 | hidnplayr | 194 | |
5586 | hidnplayr | 195 | .maintain_link: |
196 | |||
197 | ; Check for IP conflicts |
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198 | mov ebx, API_ARP |
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199 | mov bh, byte[ebp + interface.number] |
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200 | mov bl, 7 |
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201 | mcall 76 ; Number of IP conflicts |
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202 | cmp eax, [ebp + interface.ip_conflicts] |
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203 | je @f |
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204 | mov [ebp + interface.ip_conflicts], eax |
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205 | DEBUGF 2, "IP address conflict on interface %u\n", [ebp + interface.number] |
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206 | ; Notify user of the IP address conflict |
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207 | mov [notify_struct.msg], str_conflict |
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208 | mcall 70, notify_struct |
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209 | @@: |
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210 | |||
211 | ; Check if device is still there |
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212 | mov bh, byte[ebp + interface.number] |
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213 | mov bl, 0 ; Get device type |
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5391 | hidnplayr | 214 | mcall 74 |
5586 | hidnplayr | 215 | test eax, eax ; No device |
216 | jz .link_down |
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3545 | hidnplayr | 217 | |
5586 | hidnplayr | 218 | ; Check if link is still there |
219 | mov bl, 10 ; Get Link status |
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5391 | hidnplayr | 220 | mcall 74 |
221 | test eax, eax |
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5586 | hidnplayr | 222 | jnz .next |
3545 | hidnplayr | 223 | |
5586 | hidnplayr | 224 | .link_down: |
225 | mov [ebp + interface.state], 0 |
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226 | |||
227 | ; Notify user that the link is down |
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228 | mov [notify_struct.msg], str_disconnected |
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229 | mcall 70, notify_struct |
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230 | |||
231 | ; CHECKME: should we do this in kernel instead? Should we even do this at all? |
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5391 | hidnplayr | 232 | xor ecx, ecx |
233 | mov ebx, API_IPv4 + 3 |
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5586 | hidnplayr | 234 | mov bh, byte[ebp + interface.number] |
235 | mcall 76 ; ip |
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5391 | hidnplayr | 236 | mov bl, 5 |
5586 | hidnplayr | 237 | mcall 76 ; dns |
5391 | hidnplayr | 238 | mov bl, 7 |
5586 | hidnplayr | 239 | mcall 76 ; subnet |
5391 | hidnplayr | 240 | mov bl, 9 |
5586 | hidnplayr | 241 | mcall 76 ; gateway |
3545 | hidnplayr | 242 | |
5586 | hidnplayr | 243 | jmp .next |
3545 | hidnplayr | 244 | |
5586 | hidnplayr | 245 | link_up: |
246 | |||
247 | ; Read number of previous IP conflicts |
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248 | mov ebx, API_ARP |
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249 | mov bh, byte[ebp + interface.number] |
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250 | mov bl, 7 |
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251 | mcall 76 |
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252 | mov [ebp + interface.ip_conflicts], eax |
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253 | |||
254 | ; Notify user that the link is up and running |
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255 | mov [notify_struct.msg], str_connected |
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256 | mcall 70, notify_struct |
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257 | |||
258 | .fail: |
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259 | mcall 40, EVM_STACK2 |
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260 | jmp mainloop.next |
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261 | |||
5391 | hidnplayr | 262 | static: |
5586 | hidnplayr | 263 | DEBUGF 1, "Applying Static IP settings\n" |
3545 | hidnplayr | 264 | |
5586 | hidnplayr | 265 | invoke ini.get_str, ini_path, str_ini_int, str_ip, inibuf, 16, str_null |
266 | mov esi, inibuf |
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5391 | hidnplayr | 267 | call ip_str_to_dword |
3844 | hidnplayr | 268 | mov ebx, API_IPv4 + 3 ; set IP |
5586 | hidnplayr | 269 | mov bh, byte[ebp + interface.number] |
3844 | hidnplayr | 270 | mcall 76 |
3545 | hidnplayr | 271 | |
5586 | hidnplayr | 272 | invoke ini.get_str, ini_path, str_ini_int, str_subnet, inibuf, 16, str_null |
273 | mov esi, inibuf |
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5391 | hidnplayr | 274 | call ip_str_to_dword |
5586 | hidnplayr | 275 | mov ebx, API_IPv4 + 7 ; set subnet |
276 | mov bh, byte[ebp + interface.number] |
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3844 | hidnplayr | 277 | mcall 76 |
3545 | hidnplayr | 278 | |
5586 | hidnplayr | 279 | invoke ini.get_str, ini_path, str_ini_int, str_gateway, inibuf, 16, str_null |
280 | mov esi, inibuf |
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5391 | hidnplayr | 281 | call ip_str_to_dword |
5586 | hidnplayr | 282 | mov ebx, API_IPv4 + 9 ; set gateway |
283 | mov bh, byte[ebp + interface.number] |
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3844 | hidnplayr | 284 | mcall 76 |
3545 | hidnplayr | 285 | |
5586 | hidnplayr | 286 | .dns: |
287 | invoke ini.get_str, ini_path, str_ini_int, str_dns, inibuf, 16, str_null |
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288 | mov esi, inibuf |
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5391 | hidnplayr | 289 | call ip_str_to_dword |
5586 | hidnplayr | 290 | mov ebx, API_IPv4 + 5 ; set DNS |
291 | mov bh, byte[ebp + interface.number] |
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3844 | hidnplayr | 292 | mcall 76 |
3545 | hidnplayr | 293 | |
5586 | hidnplayr | 294 | jmp link_up |
3545 | hidnplayr | 295 | |
296 | |||
5586 | hidnplayr | 297 | dhcp: |
3545 | hidnplayr | 298 | |
5586 | hidnplayr | 299 | DEBUGF 2, "Trying to contact DHCP server\n" |
3545 | hidnplayr | 300 | |
5391 | hidnplayr | 301 | mcall 40, EVM_STACK |
302 | |||
5586 | hidnplayr | 303 | mcall 75, 0, AF_INET4, SOCK_DGRAM, 0 ; open socket (parameters: domain, type, reserved) |
3545 | hidnplayr | 304 | cmp eax, -1 |
5586 | hidnplayr | 305 | je dhcp_error |
306 | mov [ebp + interface.socketNum], eax |
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307 | |||
308 | DEBUGF 1, "Socket %x opened\n", eax |
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309 | |||
310 | mcall 75, 2, [ebp + interface.socketNum], sock_local, 18 ; bind socket to local port 68 |
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311 | cmp eax, -1 |
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5391 | hidnplayr | 312 | je socket_error |
3545 | hidnplayr | 313 | |
5586 | hidnplayr | 314 | DEBUGF 1, "Socket Bound to local port 68\n" |
3545 | hidnplayr | 315 | |
5586 | hidnplayr | 316 | pushd [ebp + interface.number] |
317 | pushd 4 ; length of option |
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318 | pushd 1 shl 9 ; SO_BINDTODEVICE |
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319 | pushd 0 ; SOL_SOCKET |
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320 | mcall 75, 8, [ebp + interface.socketNum], esp |
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321 | add esp, 16 |
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3545 | hidnplayr | 322 | cmp eax, -1 |
5391 | hidnplayr | 323 | je socket_error |
3545 | hidnplayr | 324 | |
5586 | hidnplayr | 325 | DEBUGF 1, "Socket Bound to local interface %u\n", [ebp + interface.number] |
3545 | hidnplayr | 326 | |
5586 | hidnplayr | 327 | mcall 75, 4, [ebp + interface.socketNum], sock_remote, 18 ; connect to 255.255.255.255 on port 67 |
3545 | hidnplayr | 328 | cmp eax, -1 |
5391 | hidnplayr | 329 | je socket_error |
3545 | hidnplayr | 330 | |
5586 | hidnplayr | 331 | DEBUGF 1, "Connected to 255.255.255.255 on port 67\n" |
3545 | hidnplayr | 332 | |
5586 | hidnplayr | 333 | ; Read preferred IP address from settings file |
334 | invoke ini.get_str, ini_path, str_ini_int, str_ip, inibuf, 16, str_null |
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335 | mov esi, inibuf |
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336 | call ip_str_to_dword |
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337 | mov [ebp + interface.ip], ecx |
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3545 | hidnplayr | 338 | |
5419 | hidnplayr | 339 | call random |
5586 | hidnplayr | 340 | mov [tx_msg.xid], eax ; randomize session ID |
341 | mov [tx_msg_type], 1 ; DHCP discover |
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5419 | hidnplayr | 342 | |
5586 | hidnplayr | 343 | build_dhcp_packet: |
5419 | hidnplayr | 344 | |
5586 | hidnplayr | 345 | DEBUGF 1, "Building DHCP packet\n" |
5419 | hidnplayr | 346 | |
5586 | hidnplayr | 347 | mov [ebp + interface.tries], DHCP_TRIES |
3545 | hidnplayr | 348 | |
5586 | hidnplayr | 349 | ; Boot protocol legacy |
350 | mov [tx_msg.op], 1 ; Boot request |
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351 | mov [tx_msg.htype], 1 ; Ethernet |
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352 | mov [tx_msg.hlen], 6 ; Ethernet address h/w len |
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353 | mov [tx_msg.hops], 0 |
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354 | mcall 26, 9 ; Time since boot |
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355 | xor edx, edx |
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356 | mov ebx, 100 |
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357 | div ebx ; Divide by 100 to get number of seconds |
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358 | mov [tx_msg.secs], ax |
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359 | mov [tx_msg.flags], 0 |
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3636 | hidnplayr | 360 | |
5586 | hidnplayr | 361 | ; DHCP extension |
362 | mov [tx_msg.cookie], 0x63538263 ; magic cookie |
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3545 | hidnplayr | 363 | |
5586 | hidnplayr | 364 | mov word[tx_msg+240], 0x0135 ; option DHCP msg type |
365 | mov al,[tx_msg_type] |
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366 | mov [tx_msg+240+2], al |
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3545 | hidnplayr | 367 | |
5586 | hidnplayr | 368 | mov word[tx_msg+240+3], 0x0433 ; option Lease time |
369 | mov dword[tx_msg+240+5], -1 ; infinite |
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3545 | hidnplayr | 370 | |
5586 | hidnplayr | 371 | mov word[tx_msg+240+9], 0x0432 ; option requested IP address |
372 | mov eax,[ebp + interface.ip] |
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373 | mov [tx_msg+240+11], eax |
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3545 | hidnplayr | 374 | |
5586 | hidnplayr | 375 | mov word[tx_msg+240+15], 0x0437 ; option request list |
376 | mov dword[tx_msg+240+17], 0x0f060301 |
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3545 | hidnplayr | 377 | |
5586 | hidnplayr | 378 | cmp [tx_msg_type], 1 ; Check which msg we are sending |
379 | jne .request |
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3545 | hidnplayr | 380 | |
5586 | hidnplayr | 381 | mov byte[tx_msg+240+21], 0xff ; end of options marker |
3545 | hidnplayr | 382 | |
5586 | hidnplayr | 383 | mov [tx_msg_len], 262 ; length |
384 | jmp send_dhcp_packet |
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3545 | hidnplayr | 385 | |
5586 | hidnplayr | 386 | .request: |
387 | mov word[tx_msg+240+21], 0x0436 ; server IP |
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388 | mov eax,[ebp + interface.ServerIP] |
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389 | mov [tx_msg+240+23], eax |
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3545 | hidnplayr | 390 | |
5586 | hidnplayr | 391 | mov byte[tx_msg+240+27], 0xff ; end of options marker |
3545 | hidnplayr | 392 | |
5586 | hidnplayr | 393 | mov [tx_msg_len], 268 ; length |
3545 | hidnplayr | 394 | |
5419 | hidnplayr | 395 | |
5586 | hidnplayr | 396 | send_dhcp_packet: |
397 | DEBUGF 1, "Sending DHCP packet\n" |
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398 | lea edx, [tx_msg] |
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399 | mcall 75, 6, [ebp + interface.socketNum], , [tx_msg_len] |
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400 | |||
401 | ; Wait for reply |
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4805 | hidnplayr | 402 | mcall 26, 9 |
403 | add eax, TIMEOUT*100 |
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5586 | hidnplayr | 404 | mov [ebp + interface.timeout], eax |
405 | mov ebx, TIMEOUT*100 |
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3735 | hidnplayr | 406 | .wait: |
5586 | hidnplayr | 407 | mcall 23 ; Wait for event with timeout |
408 | read_packet: ; we have data - this will be the response |
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409 | lea edx, [rx_msg] |
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410 | mcall 75, 7, [ebp + interface.socketNum], , BUFFER, MSG_DONTWAIT ; read data from socket |
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3632 | hidnplayr | 411 | cmp eax, -1 |
5419 | hidnplayr | 412 | jne .got_data |
4805 | hidnplayr | 413 | |
414 | mcall 26, 9 |
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5586 | hidnplayr | 415 | mov ebx, eax |
416 | sub ebx, [ebp + interface.timeout] |
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417 | ja send_dhcp_packet.wait |
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4805 | hidnplayr | 418 | |
5586 | hidnplayr | 419 | DEBUGF 2, "No answer from DHCP server\n" |
420 | dec [ebp + interface.tries] |
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421 | jnz send_dhcp_packet |
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5391 | hidnplayr | 422 | jmp dhcp_fail |
3545 | hidnplayr | 423 | |
5419 | hidnplayr | 424 | .got_data: |
5586 | hidnplayr | 425 | DEBUGF 1, "%d bytes received\n", eax |
426 | mov [rx_msg_len], eax |
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3545 | hidnplayr | 427 | |
428 | ; depending on which msg we sent, handle the response |
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429 | ; accordingly. |
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430 | ; If the response is to a dhcp discover, then: |
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431 | ; 1) If response is DHCP OFFER then |
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432 | ; 1.1) record server IP, lease time & IP address. |
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433 | ; 1.2) send a request packet |
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434 | ; If the response is to a dhcp request, then: |
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435 | ; 1) If the response is DHCP ACK then |
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436 | ; 1.1) extract the DNS & subnet fields. Set them in the stack |
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437 | |||
5586 | hidnplayr | 438 | cmp [tx_msg_type], 1 ; did we send a discover? |
5419 | hidnplayr | 439 | je discover_sent |
5586 | hidnplayr | 440 | cmp [tx_msg_type], 3 ; did we send a request? |
5419 | hidnplayr | 441 | je request_sent |
5586 | hidnplayr | 442 | jmp exit_immediately |
3545 | hidnplayr | 443 | |
5419 | hidnplayr | 444 | discover_sent: |
5586 | hidnplayr | 445 | call parse_dhcp_reply |
446 | cmp [rx_msg_type], 2 ; Was the response an offer? |
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447 | jne read_packet |
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3545 | hidnplayr | 448 | |
3636 | hidnplayr | 449 | DEBUGF 1, "Got offer, making request\n" |
5586 | hidnplayr | 450 | mov [tx_msg_type], 3 ; make it a request |
451 | jmp build_dhcp_packet |
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3545 | hidnplayr | 452 | |
5419 | hidnplayr | 453 | request_sent: |
5586 | hidnplayr | 454 | call parse_dhcp_reply |
455 | cmp [rx_msg_type], 5 ; Was the response an ACK? It should be |
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456 | jne read_packet ; NO - read next packets |
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3545 | hidnplayr | 457 | |
5391 | hidnplayr | 458 | DEBUGF 2, "IP assigned by DHCP server successfully\n" |
3636 | hidnplayr | 459 | |
5586 | hidnplayr | 460 | mcall close, [ebp + interface.socketNum] |
3545 | hidnplayr | 461 | |
3601 | hidnplayr | 462 | mov ebx, API_IPv4 + 3 |
5586 | hidnplayr | 463 | mov bh, byte[ebp + interface.number] |
464 | mcall 76, , [ebp + interface.ip] ; ip |
||
3601 | hidnplayr | 465 | mov bl, 5 |
5586 | hidnplayr | 466 | mcall 76, , [ebp + interface.subnet] ; subnet |
3601 | hidnplayr | 467 | mov bl, 9 |
5586 | hidnplayr | 468 | mcall 76, , [ebp + interface.gateway] ; gateway |
3545 | hidnplayr | 469 | |
5586 | hidnplayr | 470 | invoke ini.get_str, ini_path, str_ini_int, str_dns_type, inibuf, 16, str_null |
471 | test eax, eax |
||
472 | jnz @f |
||
473 | mov eax, dword[inibuf] |
||
474 | or eax, 0x202020 |
||
475 | cmp eax, 'stat' |
||
476 | je static.dns |
||
477 | @@: |
||
478 | mcall 76, , [ebp + interface.dns] ; dns |
||
479 | mov bl, 7 |
||
3545 | hidnplayr | 480 | |
5586 | hidnplayr | 481 | jmp link_up |
3545 | hidnplayr | 482 | |
483 | |||
5586 | hidnplayr | 484 | parse_dhcp_reply: |
3545 | hidnplayr | 485 | |
5586 | hidnplayr | 486 | DEBUGF 1, "Parsing response\n" |
487 | mov [rx_msg_type], 0 |
||
488 | |||
5419 | hidnplayr | 489 | ; Verify if session ID matches |
5586 | hidnplayr | 490 | mov eax, [tx_msg.xid] |
491 | cmp [rx_msg.xid], eax |
||
5419 | hidnplayr | 492 | jne .done |
493 | |||
5586 | hidnplayr | 494 | pushd [rx_msg.yiaddr] |
495 | pop [ebp + interface.ip] |
||
496 | DEBUGF 1, "Client: %u.%u.%u.%u\n", \ |
||
497 | [rx_msg.yiaddr]:1, [rx_msg.yiaddr+1]:1, [rx_msg.yiaddr+2]:1, [rx_msg.yiaddr+3]:1 |
||
3545 | hidnplayr | 498 | |
5586 | hidnplayr | 499 | ; Verify magic cookie |
500 | cmp [rx_msg.cookie], 0x63538263 |
||
501 | jne .done |
||
3545 | hidnplayr | 502 | |
5586 | hidnplayr | 503 | ; Parse the DHCP options |
504 | lea esi, [rx_msg] |
||
505 | mov ecx, 240 ; point to the first option |
||
3545 | hidnplayr | 506 | .next_option: |
5586 | hidnplayr | 507 | ; TODO: check if we still are inside the buffer! |
508 | add esi, ecx |
||
3545 | hidnplayr | 509 | |
5586 | hidnplayr | 510 | lodsb ; get message identifier |
511 | mov bl, al |
||
512 | cmp bl, 0xff ; End of options? |
||
3545 | hidnplayr | 513 | je .done |
5586 | hidnplayr | 514 | test bl, bl |
515 | jz .pad |
||
3545 | hidnplayr | 516 | |
5586 | hidnplayr | 517 | lodsb ; load data length |
518 | movzx ecx, al |
||
519 | cmp bl, dhcp_msg_type ; Msg type is a single byte option |
||
3545 | hidnplayr | 520 | je .msgtype |
5586 | hidnplayr | 521 | cmp bl, dhcp_dhcp_server_id |
3545 | hidnplayr | 522 | je .server |
5586 | hidnplayr | 523 | cmp bl, dhcp_address_time |
3545 | hidnplayr | 524 | je .lease |
5586 | hidnplayr | 525 | cmp bl, dhcp_subnet_mask |
3545 | hidnplayr | 526 | je .subnet |
5586 | hidnplayr | 527 | cmp bl, dhcp_router |
3545 | hidnplayr | 528 | je .router |
5586 | hidnplayr | 529 | cmp bl, dhcp_domain_server |
3545 | hidnplayr | 530 | je .dns |
531 | |||
5586 | hidnplayr | 532 | DEBUGF 1, "Unsupported DHCP option: %u\n", bl |
3545 | hidnplayr | 533 | jmp .next_option |
534 | |||
535 | .pad: |
||
536 | xor ecx, ecx |
||
537 | inc ecx |
||
538 | jmp .next_option |
||
539 | |||
540 | .msgtype: |
||
5586 | hidnplayr | 541 | mov al, [esi] |
542 | mov [rx_msg_type], al |
||
3545 | hidnplayr | 543 | |
5586 | hidnplayr | 544 | DEBUGF 1, "DHCP Msg type: %u\n", al |
3545 | hidnplayr | 545 | jmp .next_option ; Get next option |
546 | |||
547 | .server: |
||
5586 | hidnplayr | 548 | pushd [esi] |
549 | pop [ebp + interface.ServerIP] |
||
550 | DEBUGF 1, "Server: %u.%u.%u.%u\n", [esi]:1, [esi+1]:1, [esi+2]:1, [esi+3]:1 |
||
3545 | hidnplayr | 551 | jmp .next_option |
552 | |||
553 | .lease: |
||
554 | pusha |
||
5586 | hidnplayr | 555 | mov eax,[esi] |
3545 | hidnplayr | 556 | bswap eax |
5586 | hidnplayr | 557 | mov [ebp + interface.lease], eax |
558 | DEBUGF 1, "Lease: %d\n", eax |
||
3545 | hidnplayr | 559 | popa |
560 | jmp .next_option |
||
561 | |||
562 | .subnet: |
||
5586 | hidnplayr | 563 | pushd [esi] |
564 | pop [ebp + interface.subnet] |
||
565 | DEBUGF 1, "Subnet: %u.%u.%u.%u\n", [esi]:1, [esi+1]:1, [esi+2]:1, [esi+3]:1 |
||
3545 | hidnplayr | 566 | jmp .next_option |
567 | |||
568 | .router: |
||
5586 | hidnplayr | 569 | pushd [esi] |
570 | pop [ebp + interface.gateway] |
||
571 | DEBUGF 1, "Gateway: %u.%u.%u.%u\n", [esi]:1, [esi+1]:1, [esi+2]:1, [esi+3]:1 |
||
3545 | hidnplayr | 572 | jmp .next_option |
573 | |||
574 | .dns: |
||
5586 | hidnplayr | 575 | pushd [esi] |
576 | pop [ebp + interface.dns] |
||
577 | DEBUGF 1, "DNS: %u.%u.%u.%u\n", [esi]:1, [esi+1]:1, [esi+2]:1, [esi+3]:1 |
||
3545 | hidnplayr | 578 | jmp .next_option |
579 | |||
580 | .done: |
||
581 | ret |
||
582 | |||
5586 | hidnplayr | 583 | exit_immediately: |
584 | DEBUGF 2, "Zeroconf failed!\n" |
||
585 | mcall -1 |
||
5419 | hidnplayr | 586 | |
5586 | hidnplayr | 587 | socket_error: |
588 | DEBUGF 2, "Socket error!\n" |
||
589 | |||
5391 | hidnplayr | 590 | dhcp_fail: |
5586 | hidnplayr | 591 | mcall close, [ebp + interface.socketNum] |
3545 | hidnplayr | 592 | |
5586 | hidnplayr | 593 | dhcp_error: |
594 | DEBUGF 1, "DHCP failed\n" |
||
595 | cmp [ebp + interface.mode], 2 ; zero config mode? |
||
596 | jne link_up |
||
3545 | hidnplayr | 597 | |
5586 | hidnplayr | 598 | link_local: |
3545 | hidnplayr | 599 | |
5586 | hidnplayr | 600 | ; TODO: send ARP probes before setting the IP address in stack! |
5419 | hidnplayr | 601 | |
3545 | hidnplayr | 602 | call random |
603 | mov cx, ax |
||
604 | shl ecx, 16 |
||
605 | mov cx, 0xfea9 ; IP 169.254.0.0 link local net, see RFC3927 |
||
3601 | hidnplayr | 606 | mov ebx, API_IPv4 + 3 |
5586 | hidnplayr | 607 | mov bh, byte[ebp + interface.number] |
5419 | hidnplayr | 608 | mcall 76, , ecx ; mask is 255.255.0.0 |
5586 | hidnplayr | 609 | DEBUGF 2, "Link Local IP assigned: 169.254.%u.%u\n", [generator+0]:1, [generator+1]:1 |
3601 | hidnplayr | 610 | mov bl, 7 |
611 | mcall 76, , 0xffff |
||
612 | mov bl, 9 |
||
613 | mcall 76, , 0x0 |
||
614 | mov bl, 5 |
||
615 | mcall 76, , 0x0 |
||
3545 | hidnplayr | 616 | |
5586 | hidnplayr | 617 | jmp link_up |
3545 | hidnplayr | 618 | |
619 | |||
620 | random: ; Pseudo random actually |
||
621 | |||
5586 | hidnplayr | 622 | mov eax,[generator] |
3545 | hidnplayr | 623 | add eax, -43ab45b5h |
624 | ror eax, 1 |
||
625 | bswap eax |
||
5586 | hidnplayr | 626 | xor eax, dword[tx_msg.chaddr] |
3545 | hidnplayr | 627 | ror eax, 1 |
5586 | hidnplayr | 628 | xor eax, dword[tx_msg.chaddr+2] |
3545 | hidnplayr | 629 | mov [generator], eax |
630 | |||
631 | ret |
||
632 | |||
5391 | hidnplayr | 633 | |
634 | |||
5586 | hidnplayr | 635 | create_str_ini_int: |
636 | mov eax, [ebp + interface.number] |
||
637 | mov ebx, 10 |
||
638 | xor edx, edx |
||
639 | push 0 |
||
640 | @@: |
||
641 | div ebx |
||
642 | add dl, '0' |
||
643 | push edx |
||
644 | test eax, eax |
||
645 | jnz @r |
||
646 | @@: |
||
647 | mov edi, str_ini_int+2 |
||
648 | @@: |
||
649 | pop eax |
||
650 | stosb |
||
651 | test eax, eax |
||
652 | jnz @r |
||
5391 | hidnplayr | 653 | |
5586 | hidnplayr | 654 | ret |
5391 | hidnplayr | 655 | |
656 | |||
657 | |||
5586 | hidnplayr | 658 | ; In: esi = ptr to ASCIIZ IP address |
659 | ; Out: ecx = IP (0 on error) |
||
5391 | hidnplayr | 660 | |
5586 | hidnplayr | 661 | ip_str_to_dword: |
5391 | hidnplayr | 662 | |
5586 | hidnplayr | 663 | xor ecx, ecx ; end result |
664 | .charloop: |
||
665 | lodsb |
||
666 | test al, al |
||
667 | jz .finish |
||
668 | cmp al, '.' |
||
669 | je .dot |
||
670 | sub al, '0' |
||
671 | jb .fail |
||
672 | cmp al, 9 |
||
673 | ja .fail |
||
674 | mov dl, cl |
||
675 | shl cl, 2 |
||
676 | jc .fail |
||
677 | add cl, dl |
||
678 | jc .fail |
||
679 | add cl, cl |
||
680 | jc .fail |
||
681 | add cl, al |
||
682 | jc .fail |
||
683 | jmp .charloop |
||
684 | .dot: |
||
685 | shl ecx, 8 |
||
686 | jc .fail |
||
687 | xor cl, cl |
||
688 | jmp .charloop |
||
5391 | hidnplayr | 689 | .finish: |
5586 | hidnplayr | 690 | bswap ecx ; we want little endian order |
691 | ret |
||
5391 | hidnplayr | 692 | |
5586 | hidnplayr | 693 | .fail: |
694 | xor ecx, ecx |
||
695 | ret |
||
5391 | hidnplayr | 696 | |
3545 | hidnplayr | 697 | ; DATA AREA |
698 | |||
699 | align 16 |
||
700 | @IMPORT: |
||
701 | |||
702 | library \ |
||
5586 | hidnplayr | 703 | libini, 'libini.obj' |
3545 | hidnplayr | 704 | |
705 | import libini, \ |
||
5586 | hidnplayr | 706 | ini.get_str, 'ini_get_str',\ |
707 | ini.set_str, 'ini_set_str' |
||
3545 | hidnplayr | 708 | |
709 | include_debug_strings |
||
710 | |||
711 | str_ip db 'ip', 0 |
||
712 | str_subnet db 'subnet', 0 |
||
713 | str_gateway db 'gateway', 0 |
||
714 | str_dns db 'dns', 0 |
||
715 | |||
5586 | hidnplayr | 716 | str_ip_type db 'ip_type', 0 |
717 | str_dns_type db 'dns_type', 0 |
||
3545 | hidnplayr | 718 | |
5586 | hidnplayr | 719 | str_ini_int db 'ip1', 0 |
720 | rb 10 |
||
3545 | hidnplayr | 721 | |
5586 | hidnplayr | 722 | str_null db 0 |
723 | |||
724 | sock_local: |
||
3545 | hidnplayr | 725 | dw AF_INET4 |
726 | dw 68 shl 8 ; local port |
||
727 | dd 0 ; local IP |
||
728 | rb 10 |
||
729 | |||
730 | |||
5586 | hidnplayr | 731 | sock_remote: |
3545 | hidnplayr | 732 | dw AF_INET4 |
733 | dw 67 shl 8 ; destination port |
||
734 | dd -1 ; destination IP |
||
735 | rb 10 |
||
736 | |||
4013 | hidnplayr | 737 | notify_struct: |
738 | dd 7 ; run application |
||
739 | dd 0 |
||
740 | .msg dd 0 |
||
741 | dd 0 |
||
742 | dd 0 |
||
743 | db '/sys/@notify', 0 |
||
3545 | hidnplayr | 744 | |
5586 | hidnplayr | 745 | str_connected db '"You are now connected to the network." -N', 0 |
746 | str_disconnected db '"You are now disconnected from the network." -N', 0 |
||
747 | str_conflict db '"An IP address conflict has been detected on the network." -W', 0 |
||
5419 | hidnplayr | 748 | |
5586 | hidnplayr | 749 | ini_path db '/sys/settings/network.ini',0 |
4013 | hidnplayr | 750 | |
3545 | hidnplayr | 751 | IM_END: |
752 | |||
5586 | hidnplayr | 753 | generator dd ? |
754 | |||
3545 | hidnplayr | 755 | inibuf rb 16 |
756 | |||
5586 | hidnplayr | 757 | tx_msg_len dd ? |
758 | rx_msg_len dd ? |
||
759 | tx_msg_type db ? |
||
760 | rx_msg_type db ? |
||
761 | tx_msg dhcp_msg |
||
762 | rx_msg dhcp_msg |
||
3545 | hidnplayr | 763 | |
5586 | hidnplayr | 764 | device_list rd MAX_INTERFACES*sizeof.interface |
3545 | hidnplayr | 765 | |
766 | I_END: |