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Rev | Author | Line No. | Line |
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1164 | hidnplayr | 1 | ; Zero-config |
2 | ; v 1.4 |
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3 | ; |
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4 | ; DHCP code is based on that by Mike Hibbet (DHCP client for menuetos) |
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5 | ; |
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6 | ; Written by HidnPlayr & Derpenguin |
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7 | |||
8 | use32 |
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9 | org 0x0 |
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10 | |||
11 | db 'MENUET01' ; 8 byte id |
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12 | dd 0x01 ; header version |
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13 | dd START ; start of code |
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14 | dd IM_END ; size of image |
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15 | dd I_END ; memory for app |
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16 | dd I_END ; esp |
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17 | dd 0x0 , path ; I_Param , I_Icon |
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18 | |||
19 | ; CONFIGURATION |
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20 | |||
21 | |||
22 | TIMEOUT equ 60 ; in seconds |
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23 | BUFFER equ 1024 ; in bytes |
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24 | __DEBUG__ equ 1 ; enable/disable |
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25 | __DEBUG_LEVEL__ equ 1 ; 1 = all, 2 = errors |
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26 | |||
27 | ; CONFIGURATION FOR LINK-LOCAL |
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28 | |||
29 | PROBE_WAIT equ 1 ; second (initial random delay) |
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30 | PROBE_MIN equ 1 ; second (minimum delay till repeated probe) |
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31 | PROBE_MAX equ 2 ; seconds (maximum delay till repeated probe) |
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32 | PROBE_NUM equ 3 ; (number of probe packets) |
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33 | |||
34 | ANNOUNCE_NUM equ 2 ; (number of announcement packets) |
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35 | ANNOUNCE_INTERVAL equ 2 ; seconds (time between announcement packets) |
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36 | ANNOUNCE_WAIT equ 2 ; seconds (delay before announcing) |
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37 | |||
38 | MAX_CONFLICTS equ 10 ; (max conflicts before rate limiting) |
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39 | |||
40 | RATE_LIMIT_INTERVAL equ 60 ; seconds (delay between successive attempts) |
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41 | |||
42 | DEFEND_INTERVAL equ 10 ; seconds (min. wait between defensive ARPs) |
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43 | |||
44 | |||
45 | |||
46 | |||
47 | AF_INET4 equ 1337 ;;;;; |
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48 | |||
49 | |||
50 | |||
51 | |||
52 | include '../../../proc32.inc' |
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53 | include '../../../macros.inc' |
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54 | include 'debug-fdo.inc' |
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55 | include 'dhcp.inc' |
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56 | include 'dll.inc' |
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57 | |||
58 | |||
59 | Ip2dword: |
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60 | push edx |
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61 | |||
62 | ; This code validates if the query is an IP containing 4 numbers and 3 dots |
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63 | |||
64 | xor al, al ; make al (dot count) zero |
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65 | |||
66 | @@: |
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67 | cmp byte[edx],'0' ; check if this byte is a number, if not jump to no_IP |
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68 | jl no_IP ; |
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69 | cmp byte[edx],'9' ; |
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70 | jg no_IP ; |
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71 | |||
72 | inc edx ; the byte was a number, so lets check the next byte |
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73 | |||
74 | cmp byte[edx],0 ; is this byte zero? (have we reached end of query?) |
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75 | jz @f ; jump to next @@ then |
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76 | cmp byte[edx],':' |
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77 | jz @f |
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78 | |||
79 | cmp byte[edx],'.' ; is this byte a dot? |
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80 | jne @r ; if not, jump to previous @@ |
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81 | |||
82 | inc al ; the byte was a dot so increment al(dot count) |
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83 | inc edx ; next byte |
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84 | jmp @r ; lets check for numbers again (jump to previous @@) |
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85 | |||
86 | @@: ; we reach this when end of query reached |
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87 | cmp al,3 ; check if there where 3 dots |
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88 | jnz no_IP ; if not, jump to no_IP |
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89 | |||
90 | ; The following code will convert this IP into a dword and output it in eax |
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91 | ; If there is also a port number specified, this will be returned in ebx, otherwise ebx is -1 |
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92 | |||
93 | pop esi ; edx (query address) was pushed onto stack and is now popped in esi |
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94 | |||
95 | xor edx, edx ; result |
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96 | xor eax, eax ; current character |
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97 | xor ebx, ebx ; current byte |
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98 | |||
99 | .outer_loop: |
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100 | shl edx, 8 |
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101 | add edx, ebx |
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102 | xor ebx, ebx |
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103 | .inner_loop: |
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104 | lodsb |
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105 | test eax, eax |
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106 | jz .finish |
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107 | cmp al, '.' |
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108 | jz .outer_loop |
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109 | sub eax, '0' |
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110 | imul ebx, 10 |
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111 | add ebx, eax |
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112 | jmp .inner_loop |
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113 | .finish: |
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114 | shl edx, 8 |
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115 | add edx, ebx |
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116 | |||
117 | bswap edx ; we want little endian order |
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118 | |||
119 | ret |
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120 | |||
121 | no_IP: |
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122 | pop edx |
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123 | xor edx, edx |
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124 | |||
125 | ret |
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126 | |||
127 | |||
128 | |||
129 | |||
130 | |||
131 | |||
132 | START: ; start of execution |
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133 | |||
134 | mcall 40, 1 shl 7 ; network event |
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135 | |||
136 | ; eth.set_network_drv 0x00000383 |
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137 | |||
138 | DEBUGF 1,"Zero-config service:\n" |
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139 | |||
140 | ; eth.status eax ; Read the Stack status |
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141 | ; test eax,eax ; if eax is zero, no driver was found |
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142 | ; jnz @f |
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143 | ; DEBUGF 1,"No Card found!\n" |
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144 | ; jmp close |
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145 | |||
146 | ; @@: |
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147 | ; DEBUGF 1,"Detected card: %x\n",eax |
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148 | ; @@: |
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149 | ; eth.check_cable eax |
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150 | ; test al,al |
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151 | ; jnz @f |
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152 | ; DEBUGF 1,"Cable disconnected!\n" |
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153 | ; mcall 5, 500 ; loop until cable is connected (check every 5 sec) |
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154 | ; jmp @r |
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155 | |||
156 | ; @@: |
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157 | ; eth.read_mac MAC |
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158 | |||
159 | mcall 73, 10 |
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160 | mov word[MAC], bx |
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161 | mov dword[MAC+2], eax |
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162 | |||
163 | DEBUGF 1,"MAC: %x-%x-%x-%x-%x-%x\n",[MAC]:2,[MAC+1]:2,[MAC+2]:2,[MAC+3]:2,[MAC+4]:2,[MAC+5]:2 |
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164 | |||
165 | cld |
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166 | mov edi, path ; Calculate the length of zero-terminated string |
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167 | xor al , al |
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168 | mov ecx, 1024 |
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169 | repnz scas byte[es:edi] |
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170 | dec edi |
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171 | |||
172 | mov esi, filename |
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173 | movsd |
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174 | movsb |
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175 | |||
176 | DEBUGF 1,"path to ini: %s\n", path |
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177 | |||
178 | mcall 68,11 |
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179 | |||
180 | stdcall dll.Load,@IMPORT |
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181 | or eax,eax |
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182 | jnz skip_ini |
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183 | |||
184 | |||
185 | invoke ini.get_str, path, str_ipconfig, str_type, inibuf, 16, 0 |
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186 | |||
187 | mov eax,dword[inibuf] |
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188 | |||
189 | cmp eax,'stat' |
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190 | jne skip_ini |
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191 | |||
192 | invoke ini.get_str, path, str_ipconfig, str_ip, inibuf, 16, 0 |
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193 | mov edx, inibuf |
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194 | call Ip2dword |
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195 | mcall 73, 3, edx |
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196 | |||
197 | invoke ini.get_str, path, str_ipconfig, str_gateway, inibuf, 16, 0 |
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198 | mov edx, inibuf |
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199 | call Ip2dword |
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200 | mcall 73, 9, edx |
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201 | |||
202 | invoke ini.get_str, path, str_ipconfig, str_dns, inibuf, 16, 0 |
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203 | mov edx, inibuf |
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204 | call Ip2dword |
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205 | mcall 73, 7, edx |
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206 | |||
207 | invoke ini.get_str, path, str_ipconfig, str_subnet, inibuf, 16, 0 |
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208 | mov edx, inibuf |
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209 | call Ip2dword |
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210 | mcall 73, 5, edx |
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211 | |||
212 | |||
213 | mcall -1 |
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214 | |||
215 | |||
216 | skip_ini: |
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217 | |||
218 | DEBUGF 1,"Skip ini\n" |
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219 | |||
220 | mcall 74, 0, AF_INET4, 1, 0 ; open socket (parameters: domain, type, protocol) |
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221 | cmp eax, -1 |
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222 | je error |
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223 | mov [socketNum], eax |
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224 | |||
225 | DEBUGF 1,"socket %x opened\n", eax |
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226 | |||
227 | mcall 74, 2, [socketNum], sockaddr1, 18 ; bind socket to local port 68 |
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228 | cmp eax, -1 |
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229 | je error |
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230 | |||
231 | DEBUGF 1,"Socket Bound to local port 68\n" |
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232 | |||
233 | |||
234 | mcall 74, 4, [socketNum], sockaddr2, 18 ; connect to 255.255.255.255 on port 67 |
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235 | cmp eax, -1 |
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236 | je error |
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237 | |||
238 | DEBUGF 1,"Connected to 255.255.255.255 on port 67\n" |
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239 | |||
240 | mov byte [dhcpMsgType], 0x01 ; DHCP discover |
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241 | mov dword [dhcpLease], esi ; esi is still -1 (-1 = forever) |
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242 | |||
243 | mcall 26, 9 |
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244 | imul eax,100 |
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245 | mov [currTime],eax |
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246 | |||
247 | buildRequest: ; Creates a DHCP request packet. |
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248 | |||
249 | DEBUGF 1,"Building request\n" |
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250 | |||
251 | stdcall mem.Alloc, BUFFER |
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252 | mov [dhcpMsg], eax |
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253 | test eax,eax |
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254 | jz apipa |
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255 | |||
256 | |||
257 | mov edi, eax |
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258 | mov ecx,BUFFER |
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259 | xor eax,eax |
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260 | cld |
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261 | rep stosb |
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262 | |||
263 | mov edx,[dhcpMsg] |
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264 | |||
265 | mov [edx], byte 0x01 ; Boot request |
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266 | mov [edx+1], byte 0x01 ; Ethernet |
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267 | mov [edx+2], byte 0x06 ; Ethernet h/w len |
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268 | mov [edx+4], dword 0x11223344 ; xid |
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269 | mov eax,[currTime] |
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270 | mov [edx+8], eax ; secs, our uptime |
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271 | mov [edx+10], byte 0x80 ; broadcast flag set |
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272 | mov eax, dword [MAC] ; first 4 bytes of MAC |
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273 | mov [edx+28],dword eax |
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274 | mov ax, word [MAC+4] ; last 2 bytes of MAC |
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275 | mov [edx+32],word ax |
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276 | mov [edx+236], dword 0x63538263 ; magic number |
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277 | mov [edx+240], word 0x0135 ; option DHCP msg type |
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278 | mov al, [dhcpMsgType] |
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279 | mov [edx+240+2], al |
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280 | mov [edx+240+3], word 0x0433 ; option Lease time = infinity |
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281 | mov eax, [dhcpLease] |
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282 | mov [edx+240+5], eax |
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283 | mov [edx+240+9], word 0x0432 ; option requested IP address |
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284 | mov eax, [dhcpClientIP] |
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285 | mov [edx+240+11], eax |
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286 | mov [edx+240+15], word 0x0437 ; option request list |
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287 | mov [edx+240+17], dword 0x0f060301 |
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288 | |||
289 | cmp [dhcpMsgType], byte 0x01 ; Check which msg we are sending |
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290 | jne request_options |
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291 | |||
292 | mov [edx+240+21], byte 0xff ; "Discover" options |
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293 | |||
294 | mov [dhcpMsgLen], dword 262 ; end of options marker |
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295 | jmp send_request |
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296 | |||
297 | request_options: |
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298 | mov [edx+240+21], word 0x0436 ; server IP |
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299 | mov eax, [dhcpServerIP] |
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300 | mov [edx+240+23], eax |
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301 | |||
302 | mov [edx+240+27], byte 0xff ; end of options marker |
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303 | |||
304 | mov [dhcpMsgLen], dword 268 |
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305 | |||
306 | send_request: |
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307 | mcall 74, 6, [socketNum], [dhcpMsg], [dhcpMsgLen] ; write to socket ( send broadcast request ) |
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308 | |||
309 | mov eax, [dhcpMsg] ; Setup the DHCP buffer to receive response |
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310 | mov [dhcpMsgLen], eax ; Used as a pointer to the data |
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311 | |||
312 | mcall 23, TIMEOUT*10 ; wait for data |
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313 | |||
314 | read_data: ; we have data - this will be the response |
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315 | |||
316 | mcall 74, 7, [socketNum], [dhcpMsg], BUFFER ; read data from socket |
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317 | |||
318 | DEBUGF 1,"%u bytes received\n", eax |
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319 | |||
320 | push eax |
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321 | mcall 74, 10, [socketNum] ; close the socket |
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322 | pop eax |
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323 | |||
324 | cmp eax, -1 |
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325 | je error |
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326 | |||
327 | mov [dhcpMsgLen], eax |
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328 | |||
329 | ; depending on which msg we sent, handle the response |
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330 | ; accordingly. |
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331 | ; If the response is to a dhcp discover, then: |
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332 | ; 1) If response is DHCP OFFER then |
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333 | ; 1.1) record server IP, lease time & IP address. |
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334 | ; 1.2) send a request packet |
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335 | ; If the response is to a dhcp request, then: |
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336 | ; 1) If the response is DHCP ACK then |
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337 | ; 1.1) extract the DNS & subnet fields. Set them in the stack |
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338 | |||
339 | cmp [dhcpMsgType], byte 0x01 ; did we send a discover? |
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340 | je discover |
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341 | cmp [dhcpMsgType], byte 0x03 ; did we send a request? |
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342 | je request |
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343 | |||
344 | jmp close ; really unknown, what we did |
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345 | |||
346 | discover: |
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347 | call parseResponse |
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348 | |||
349 | cmp [dhcpMsgType], byte 0x02 ; Was the response an offer? |
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350 | jne apipa ; NO - so we do zeroconf |
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351 | mov [dhcpMsgType], byte 0x03 ; DHCP request |
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352 | jmp buildRequest |
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353 | |||
354 | request: |
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355 | call parseResponse |
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356 | |||
357 | cmp [dhcpMsgType], byte 0x05 ; Was the response an ACK? It should be |
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358 | jne apipa ; NO - so we do zeroconf |
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359 | |||
360 | jmp close |
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361 | |||
362 | ;*************************************************************************** |
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363 | ; Function |
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364 | ; parseResponse |
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365 | ; |
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366 | ; Description |
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367 | ; extracts the fields ( client IP address and options ) from |
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368 | ; a DHCP response |
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369 | ; The values go into |
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370 | ; dhcpMsgType,dhcpLease,dhcpClientIP,dhcpServerIP, |
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371 | ; dhcpDNSIP, dhcpSubnet |
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372 | ; The message is stored in dhcpMsg |
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373 | ; |
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374 | ;*************************************************************************** |
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375 | parseResponse: |
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376 | DEBUGF 1,"Data received, parsing response\n" |
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377 | mov edx, [dhcpMsg] |
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378 | |||
379 | pusha |
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380 | mcall 73, 3, [edx+16] |
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381 | mov eax,[edx] |
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382 | mov [dhcpClientIP],eax |
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383 | DEBUGF 1,"Client: %u.%u.%u.%u\n",[edx+16]:1,[edx+17]:1,[edx+18]:1,[edx+19]:1 |
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384 | popa |
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385 | |||
386 | add edx, 240 ; Point to first option |
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387 | xor ecx, ecx |
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388 | |||
389 | next_option: |
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390 | add edx, ecx |
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391 | pr001: |
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392 | mov al, [edx] |
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393 | cmp al, 0xff ; End of options? |
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394 | je pr_exit |
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395 | |||
396 | cmp al, dhcp_msg_type ; Msg type is a single byte option |
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397 | jne @f |
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398 | |||
399 | mov al, [edx+2] |
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400 | mov [dhcpMsgType], al |
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401 | add edx, 3 |
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402 | jmp pr001 ; Get next option |
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403 | |||
404 | @@: |
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405 | inc edx |
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406 | movzx ecx, byte [edx] |
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407 | inc edx ; point to data |
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408 | |||
409 | cmp al, dhcp_dhcp_server_id ; server ip |
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410 | jne @f |
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411 | mov eax, [edx] |
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412 | mov [dhcpServerIP], eax |
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413 | DEBUGF 1,"Server: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
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414 | jmp next_option |
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415 | |||
416 | @@: |
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417 | cmp al, dhcp_address_time |
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418 | jne @f |
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419 | |||
420 | pusha |
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421 | mov eax,[edx] |
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422 | bswap eax |
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423 | mov [dhcpLease],eax |
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424 | DEBUGF 1,"lease: %d\n",eax |
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425 | popa |
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426 | |||
427 | jmp next_option |
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428 | |||
429 | @@: |
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430 | cmp al, dhcp_subnet_mask |
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431 | jne @f |
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432 | |||
433 | pusha |
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434 | mcall 73, 5, [edx] |
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435 | DEBUGF 1,"Subnet: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
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436 | popa |
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437 | |||
438 | jmp next_option |
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439 | |||
440 | @@: |
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441 | cmp al, dhcp_router |
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442 | jne @f |
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443 | |||
444 | pusha |
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445 | mcall 73, 9, [edx] |
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446 | DEBUGF 1,"Gateway: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
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447 | popa |
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448 | |||
449 | jmp next_option |
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450 | |||
451 | |||
452 | @@: |
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453 | cmp al, dhcp_domain_server |
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454 | jne next_option |
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455 | |||
456 | pusha |
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457 | mcall 73, 7, [edx] |
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458 | DEBUGF 1,"DNS: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
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459 | popa |
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460 | |||
461 | jmp next_option |
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462 | |||
463 | pr_exit: |
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464 | |||
465 | ; DEBUGF 1,"Sending ARP announce\n" |
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466 | ; eth.ARP_ANNOUNCE [dhcpClientIP] ; send an ARP announce packet |
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467 | |||
468 | jmp close |
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469 | |||
470 | apipa: |
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471 | stdcall mem.Free, [dhcpMsg] |
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472 | |||
473 | link_local: |
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474 | call random |
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475 | mov ecx,0xfea9 ; IP 169.254.0.0 link local net, see RFC3927 |
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476 | mov cx,ax |
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477 | mcall 73, 3, ecx ; mask is 255.255.0.0 |
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478 | DEBUGF 1,"Link Local IP assinged: 169.254.%u.%u\n",[generator+2]:1,[generator+3]:1 |
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479 | mcall 73, 5, 0xffff |
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480 | mcall 73, 9, 0x0 |
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481 | mcall 73, 7, 0x0 |
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482 | |||
483 | mcall 5, PROBE_WAIT*100 |
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484 | |||
485 | xor esi,esi |
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486 | probe_loop: |
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487 | call random ; create a pseudo random number in eax (seeded by MAC) |
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488 | |||
489 | cmp al,PROBE_MIN*100 ; check if al is bigger then PROBE_MIN |
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490 | jge @f ; all ok |
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491 | add al,(PROBE_MAX-PROBE_MIN)*100 ; al is too small |
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492 | @@: |
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493 | |||
494 | cmp al,PROBE_MAX*100 |
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495 | jle @f |
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496 | sub al,(PROBE_MAX-PROBE_MIN)*100 |
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497 | @@: |
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498 | |||
499 | movzx ebx,al |
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500 | DEBUGF 1,"Waiting %u0ms\n",ebx |
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501 | mcall 5 |
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502 | |||
503 | DEBUGF 1,"Sending Probe\n" |
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504 | ; eth.ARP_PROBE MAC |
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505 | inc esi |
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506 | |||
507 | cmp esi,PROBE_NUM |
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508 | jl probe_loop |
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509 | |||
510 | ; now we wait further ANNOUNCE_WAIT seconds and send ANNOUNCE_NUM ARP announces. If any other host has assingned |
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511 | ; IP within this time, we should create another adress, that have to be done later |
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512 | |||
513 | DEBUGF 1,"Waiting %us\n",ANNOUNCE_WAIT |
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514 | mcall 5, ANNOUNCE_WAIT*100 |
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515 | xor esi,esi |
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516 | announce_loop: |
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517 | |||
518 | DEBUGF 1,"Sending Announce\n" |
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519 | ; eth.ARP_ANNOUNCE MAC |
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520 | |||
521 | inc esi |
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522 | cmp esi,ANNOUNCE_NUM |
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523 | je @f |
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524 | |||
525 | DEBUGF 1,"Waiting %us\n",ANNOUNCE_INTERVAL |
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526 | mcall 5, ANNOUNCE_INTERVAL*100 |
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527 | jmp announce_loop |
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528 | @@: |
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529 | ; we should, instead of closing, detect ARP conflicts and detect if cable keeps connected ;) |
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530 | |||
531 | error: |
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532 | close: |
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533 | mcall -1 |
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534 | |||
535 | |||
536 | random: ; Pseudo random actually |
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537 | |||
538 | mov eax,[generator] |
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539 | add eax,-43ab45b5h |
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540 | ror eax,1 |
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541 | bswap eax |
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542 | xor eax,dword[MAC] |
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543 | ror eax,1 |
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544 | xor eax,dword[MAC+2] |
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545 | mov [generator],eax |
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546 | |||
547 | ret |
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548 | |||
549 | ; DATA AREA |
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550 | |||
551 | align 16 |
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552 | @IMPORT: |
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553 | |||
554 | library \ |
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555 | libini,'libini.obj' |
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556 | |||
557 | import libini, \ |
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558 | ini.get_str,'ini.get_str' |
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559 | |||
560 | include_debug_strings |
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561 | |||
562 | filename db '.ini',0 |
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563 | str_ip db 'ip',0 |
||
564 | str_subnet db 'subnet',0 |
||
565 | str_gateway db 'gateway',0 |
||
566 | str_dns db 'dns',0 |
||
567 | str_ipconfig db 'ipconfig',0 |
||
568 | str_type db 'type',0 |
||
569 | |||
570 | |||
571 | sockaddr1: |
||
572 | |||
573 | dw AF_INET4 |
||
574 | dw 68 ; local port |
||
575 | dd 0 ; local IP |
||
576 | |||
577 | rb 10 |
||
578 | |||
579 | |||
580 | sockaddr2: |
||
581 | |||
582 | dw AF_INET4 |
||
583 | dw 67 ; destination port |
||
584 | dd -1 ; destination IP |
||
585 | |||
586 | rb 10 |
||
587 | |||
588 | |||
589 | IM_END: |
||
590 | |||
591 | inibuf rb 16 |
||
592 | |||
593 | dhcpClientIP dd ? |
||
594 | dhcpMsgType db ? |
||
595 | dhcpLease dd ? |
||
596 | dhcpServerIP dd ? |
||
597 | |||
598 | dhcpMsgLen dd ? |
||
599 | socketNum dd ? |
||
600 | |||
601 | MAC dp ? |
||
602 | |||
603 | currTime dd ? |
||
604 | renewTime dd ? |
||
605 | generator dd ? |
||
606 | |||
607 | dhcpMsg dd ? |
||
608 | |||
609 | I_END_2: |
||
610 | |||
611 | path rb 1024+5 |
||
612 | |||
613 | I_END: |