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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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1192 | hidnplayr | 15 | dd (I_END+0x100) ; memory for app |
16 | dd (I_END+0x100) ; esp |
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17 | dd 0x0 , path ; I_Param , I_Icon |
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1164 | hidnplayr | 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 | |||
1170 | hidnplayr | 45 | AF_INET4 equ 2 ;;;;; |
46 | IP_PROTO_UDP equ 17 |
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1164 | hidnplayr | 47 | |
48 | |||
49 | |||
1166 | hidnplayr | 50 | include '../proc32.inc' |
51 | include '../macros.inc' |
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52 | include '../debug-fdo.inc' |
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1164 | hidnplayr | 53 | include 'dhcp.inc' |
54 | include 'dll.inc' |
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55 | |||
56 | |||
57 | Ip2dword: |
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58 | push edx |
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59 | |||
60 | ; This code validates if the query is an IP containing 4 numbers and 3 dots |
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61 | |||
62 | xor al, al ; make al (dot count) zero |
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63 | |||
64 | @@: |
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65 | cmp byte[edx],'0' ; check if this byte is a number, if not jump to no_IP |
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66 | jl no_IP ; |
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67 | cmp byte[edx],'9' ; |
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68 | jg no_IP ; |
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69 | |||
70 | inc edx ; the byte was a number, so lets check the next byte |
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71 | |||
72 | cmp byte[edx],0 ; is this byte zero? (have we reached end of query?) |
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73 | jz @f ; jump to next @@ then |
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74 | cmp byte[edx],':' |
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75 | jz @f |
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76 | |||
77 | cmp byte[edx],'.' ; is this byte a dot? |
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78 | jne @r ; if not, jump to previous @@ |
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79 | |||
80 | inc al ; the byte was a dot so increment al(dot count) |
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81 | inc edx ; next byte |
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82 | jmp @r ; lets check for numbers again (jump to previous @@) |
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83 | |||
84 | @@: ; we reach this when end of query reached |
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85 | cmp al,3 ; check if there where 3 dots |
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86 | jnz no_IP ; if not, jump to no_IP |
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87 | |||
88 | ; The following code will convert this IP into a dword and output it in eax |
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89 | ; If there is also a port number specified, this will be returned in ebx, otherwise ebx is -1 |
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90 | |||
91 | pop esi ; edx (query address) was pushed onto stack and is now popped in esi |
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92 | |||
93 | xor edx, edx ; result |
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94 | xor eax, eax ; current character |
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95 | xor ebx, ebx ; current byte |
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96 | |||
97 | .outer_loop: |
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98 | shl edx, 8 |
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99 | add edx, ebx |
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100 | xor ebx, ebx |
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101 | .inner_loop: |
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102 | lodsb |
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103 | test eax, eax |
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104 | jz .finish |
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105 | cmp al, '.' |
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106 | jz .outer_loop |
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107 | sub eax, '0' |
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108 | imul ebx, 10 |
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109 | add ebx, eax |
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110 | jmp .inner_loop |
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111 | .finish: |
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112 | shl edx, 8 |
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113 | add edx, ebx |
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114 | |||
115 | bswap edx ; we want little endian order |
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116 | |||
117 | ret |
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118 | |||
119 | no_IP: |
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120 | pop edx |
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121 | xor edx, edx |
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122 | |||
123 | ret |
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124 | |||
125 | |||
126 | |||
127 | |||
128 | |||
129 | |||
130 | START: ; start of execution |
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131 | |||
132 | mcall 40, 1 shl 7 ; network event |
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133 | |||
134 | ; eth.set_network_drv 0x00000383 |
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135 | |||
1170 | hidnplayr | 136 | DEBUGF 1,">Zero-config service:\n" |
1164 | hidnplayr | 137 | |
138 | ; eth.status eax ; Read the Stack status |
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139 | ; test eax,eax ; if eax is zero, no driver was found |
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140 | ; jnz @f |
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141 | ; DEBUGF 1,"No Card found!\n" |
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142 | ; jmp close |
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143 | |||
144 | ; @@: |
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145 | ; DEBUGF 1,"Detected card: %x\n",eax |
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146 | ; @@: |
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147 | ; eth.check_cable eax |
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148 | ; test al,al |
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149 | ; jnz @f |
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150 | ; DEBUGF 1,"Cable disconnected!\n" |
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151 | ; mcall 5, 500 ; loop until cable is connected (check every 5 sec) |
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152 | ; jmp @r |
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153 | |||
154 | ; @@: |
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155 | ; eth.read_mac MAC |
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156 | |||
1170 | hidnplayr | 157 | mcall 75, 1337 shl 16 + 4 |
1174 | hidnplayr | 158 | |
159 | cmp eax, -1 |
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160 | je close |
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161 | |||
1164 | hidnplayr | 162 | mov word[MAC], bx |
163 | mov dword[MAC+2], eax |
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164 | |||
1170 | hidnplayr | 165 | 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 |
1164 | hidnplayr | 166 | |
167 | cld |
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168 | mov edi, path ; Calculate the length of zero-terminated string |
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169 | xor al , al |
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170 | mov ecx, 1024 |
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171 | repnz scas byte[es:edi] |
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172 | dec edi |
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173 | |||
174 | mov esi, filename |
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175 | movsd |
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176 | movsb |
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177 | |||
1170 | hidnplayr | 178 | DEBUGF 1,"->path to ini: %s\n", path |
1164 | hidnplayr | 179 | |
180 | mcall 68,11 |
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181 | |||
182 | stdcall dll.Load,@IMPORT |
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183 | or eax,eax |
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184 | jnz skip_ini |
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185 | |||
186 | |||
187 | invoke ini.get_str, path, str_ipconfig, str_type, inibuf, 16, 0 |
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188 | |||
189 | mov eax,dword[inibuf] |
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190 | |||
191 | cmp eax,'stat' |
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192 | jne skip_ini |
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193 | |||
194 | invoke ini.get_str, path, str_ipconfig, str_ip, inibuf, 16, 0 |
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195 | mov edx, inibuf |
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196 | call Ip2dword |
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1196 | hidnplayr | 197 | mcall 75, 3, edx |
1164 | hidnplayr | 198 | |
199 | invoke ini.get_str, path, str_ipconfig, str_gateway, inibuf, 16, 0 |
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200 | mov edx, inibuf |
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201 | call Ip2dword |
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1196 | hidnplayr | 202 | mcall 75, 9, edx |
1164 | hidnplayr | 203 | |
204 | invoke ini.get_str, path, str_ipconfig, str_dns, inibuf, 16, 0 |
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205 | mov edx, inibuf |
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206 | call Ip2dword |
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1196 | hidnplayr | 207 | mcall 75, 7, edx |
1164 | hidnplayr | 208 | |
209 | invoke ini.get_str, path, str_ipconfig, str_subnet, inibuf, 16, 0 |
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210 | mov edx, inibuf |
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211 | call Ip2dword |
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1196 | hidnplayr | 212 | mcall 75, 5, edx |
1164 | hidnplayr | 213 | |
214 | |||
215 | mcall -1 |
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216 | |||
217 | |||
218 | skip_ini: |
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219 | |||
1170 | hidnplayr | 220 | DEBUGF 1,"->Skip ini\n" |
1164 | hidnplayr | 221 | |
1170 | hidnplayr | 222 | mcall 74, 0, AF_INET4, IP_PROTO_UDP, 0 ; open socket (parameters: domain, type, reserved) |
1164 | hidnplayr | 223 | cmp eax, -1 |
224 | je error |
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225 | mov [socketNum], eax |
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226 | |||
1170 | hidnplayr | 227 | DEBUGF 1,"->socket %x opened\n", eax |
1164 | hidnplayr | 228 | |
229 | mcall 74, 2, [socketNum], sockaddr1, 18 ; bind socket to local port 68 |
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230 | cmp eax, -1 |
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231 | je error |
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232 | |||
1170 | hidnplayr | 233 | DEBUGF 1,"->Socket Bound to local port 68\n" |
1164 | hidnplayr | 234 | |
235 | mcall 74, 4, [socketNum], sockaddr2, 18 ; connect to 255.255.255.255 on port 67 |
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236 | cmp eax, -1 |
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237 | je error |
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238 | |||
1170 | hidnplayr | 239 | DEBUGF 1,"->Connected to 255.255.255.255 on port 67\n" |
1164 | hidnplayr | 240 | |
241 | mov byte [dhcpMsgType], 0x01 ; DHCP discover |
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242 | mov dword [dhcpLease], esi ; esi is still -1 (-1 = forever) |
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243 | |||
244 | mcall 26, 9 |
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245 | imul eax,100 |
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246 | mov [currTime],eax |
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247 | |||
248 | buildRequest: ; Creates a DHCP request packet. |
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249 | |||
1170 | hidnplayr | 250 | DEBUGF 1,"->Building request\n" |
1164 | hidnplayr | 251 | |
252 | stdcall mem.Alloc, BUFFER |
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253 | mov [dhcpMsg], eax |
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254 | test eax,eax |
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255 | jz apipa |
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256 | |||
257 | |||
258 | mov edi, eax |
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259 | mov ecx,BUFFER |
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260 | xor eax,eax |
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261 | cld |
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262 | rep stosb |
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263 | |||
264 | mov edx,[dhcpMsg] |
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265 | |||
266 | mov [edx], byte 0x01 ; Boot request |
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267 | mov [edx+1], byte 0x01 ; Ethernet |
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268 | mov [edx+2], byte 0x06 ; Ethernet h/w len |
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269 | mov [edx+4], dword 0x11223344 ; xid |
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270 | mov eax,[currTime] |
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271 | mov [edx+8], eax ; secs, our uptime |
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272 | mov [edx+10], byte 0x80 ; broadcast flag set |
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273 | mov eax, dword [MAC] ; first 4 bytes of MAC |
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274 | mov [edx+28],dword eax |
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275 | mov ax, word [MAC+4] ; last 2 bytes of MAC |
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276 | mov [edx+32],word ax |
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277 | mov [edx+236], dword 0x63538263 ; magic number |
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278 | mov [edx+240], word 0x0135 ; option DHCP msg type |
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279 | mov al, [dhcpMsgType] |
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280 | mov [edx+240+2], al |
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281 | mov [edx+240+3], word 0x0433 ; option Lease time = infinity |
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282 | mov eax, [dhcpLease] |
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283 | mov [edx+240+5], eax |
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284 | mov [edx+240+9], word 0x0432 ; option requested IP address |
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285 | mov eax, [dhcpClientIP] |
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286 | mov [edx+240+11], eax |
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287 | mov [edx+240+15], word 0x0437 ; option request list |
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288 | mov [edx+240+17], dword 0x0f060301 |
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289 | |||
290 | cmp [dhcpMsgType], byte 0x01 ; Check which msg we are sending |
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291 | jne request_options |
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292 | |||
293 | mov [edx+240+21], byte 0xff ; "Discover" options |
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294 | |||
295 | mov [dhcpMsgLen], dword 262 ; end of options marker |
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296 | jmp send_request |
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297 | |||
298 | request_options: |
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299 | mov [edx+240+21], word 0x0436 ; server IP |
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300 | mov eax, [dhcpServerIP] |
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301 | mov [edx+240+23], eax |
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302 | |||
303 | mov [edx+240+27], byte 0xff ; end of options marker |
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304 | |||
305 | mov [dhcpMsgLen], dword 268 |
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306 | |||
307 | send_request: |
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308 | mcall 74, 6, [socketNum], [dhcpMsg], [dhcpMsgLen] ; write to socket ( send broadcast request ) |
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309 | |||
310 | mov eax, [dhcpMsg] ; Setup the DHCP buffer to receive response |
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311 | mov [dhcpMsgLen], eax ; Used as a pointer to the data |
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312 | |||
313 | mcall 23, TIMEOUT*10 ; wait for data |
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314 | |||
315 | read_data: ; we have data - this will be the response |
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316 | |||
317 | mcall 74, 7, [socketNum], [dhcpMsg], BUFFER ; read data from socket |
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318 | |||
1170 | hidnplayr | 319 | DEBUGF 1,"->%d bytes received\n", eax |
1164 | hidnplayr | 320 | |
321 | push eax |
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1170 | hidnplayr | 322 | mcall 74, 1, [socketNum] ; close the socket |
1164 | hidnplayr | 323 | pop eax |
324 | |||
325 | cmp eax, -1 |
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326 | je error |
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327 | |||
328 | mov [dhcpMsgLen], eax |
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329 | |||
330 | ; depending on which msg we sent, handle the response |
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331 | ; accordingly. |
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332 | ; If the response is to a dhcp discover, then: |
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333 | ; 1) If response is DHCP OFFER then |
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334 | ; 1.1) record server IP, lease time & IP address. |
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335 | ; 1.2) send a request packet |
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336 | ; If the response is to a dhcp request, then: |
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337 | ; 1) If the response is DHCP ACK then |
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338 | ; 1.1) extract the DNS & subnet fields. Set them in the stack |
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339 | |||
340 | cmp [dhcpMsgType], byte 0x01 ; did we send a discover? |
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341 | je discover |
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342 | cmp [dhcpMsgType], byte 0x03 ; did we send a request? |
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343 | je request |
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344 | |||
345 | jmp close ; really unknown, what we did |
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346 | |||
347 | discover: |
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348 | call parseResponse |
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349 | |||
350 | cmp [dhcpMsgType], byte 0x02 ; Was the response an offer? |
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351 | jne apipa ; NO - so we do zeroconf |
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352 | mov [dhcpMsgType], byte 0x03 ; DHCP request |
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353 | jmp buildRequest |
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354 | |||
355 | request: |
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356 | call parseResponse |
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357 | |||
358 | cmp [dhcpMsgType], byte 0x05 ; Was the response an ACK? It should be |
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359 | jne apipa ; NO - so we do zeroconf |
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360 | |||
361 | jmp close |
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362 | |||
363 | ;*************************************************************************** |
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364 | ; Function |
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365 | ; parseResponse |
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366 | ; |
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367 | ; Description |
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368 | ; extracts the fields ( client IP address and options ) from |
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369 | ; a DHCP response |
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370 | ; The values go into |
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371 | ; dhcpMsgType,dhcpLease,dhcpClientIP,dhcpServerIP, |
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372 | ; dhcpDNSIP, dhcpSubnet |
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373 | ; The message is stored in dhcpMsg |
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374 | ; |
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375 | ;*************************************************************************** |
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376 | parseResponse: |
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377 | DEBUGF 1,"Data received, parsing response\n" |
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378 | mov edx, [dhcpMsg] |
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379 | |||
380 | pusha |
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1170 | hidnplayr | 381 | mcall 75, 3, [edx+16] |
1164 | hidnplayr | 382 | mov eax,[edx] |
383 | mov [dhcpClientIP],eax |
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384 | DEBUGF 1,"Client: %u.%u.%u.%u\n",[edx+16]:1,[edx+17]:1,[edx+18]:1,[edx+19]:1 |
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385 | popa |
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386 | |||
387 | add edx, 240 ; Point to first option |
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388 | xor ecx, ecx |
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389 | |||
390 | next_option: |
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391 | add edx, ecx |
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392 | pr001: |
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393 | mov al, [edx] |
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394 | cmp al, 0xff ; End of options? |
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395 | je pr_exit |
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396 | |||
397 | cmp al, dhcp_msg_type ; Msg type is a single byte option |
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398 | jne @f |
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399 | |||
400 | mov al, [edx+2] |
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401 | mov [dhcpMsgType], al |
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402 | add edx, 3 |
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403 | jmp pr001 ; Get next option |
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404 | |||
405 | @@: |
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406 | inc edx |
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407 | movzx ecx, byte [edx] |
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408 | inc edx ; point to data |
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409 | |||
410 | cmp al, dhcp_dhcp_server_id ; server ip |
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411 | jne @f |
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412 | mov eax, [edx] |
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413 | mov [dhcpServerIP], eax |
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414 | DEBUGF 1,"Server: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
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415 | jmp next_option |
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416 | |||
417 | @@: |
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418 | cmp al, dhcp_address_time |
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419 | jne @f |
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420 | |||
421 | pusha |
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422 | mov eax,[edx] |
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423 | bswap eax |
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424 | mov [dhcpLease],eax |
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425 | DEBUGF 1,"lease: %d\n",eax |
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426 | popa |
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427 | |||
428 | jmp next_option |
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429 | |||
430 | @@: |
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431 | cmp al, dhcp_subnet_mask |
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432 | jne @f |
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433 | |||
434 | pusha |
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1170 | hidnplayr | 435 | mcall 75, 7, [edx] |
1164 | hidnplayr | 436 | DEBUGF 1,"Subnet: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
437 | popa |
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438 | |||
439 | jmp next_option |
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440 | |||
441 | @@: |
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442 | cmp al, dhcp_router |
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443 | jne @f |
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444 | |||
445 | pusha |
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1170 | hidnplayr | 446 | mcall 75, 9, [edx] |
1164 | hidnplayr | 447 | DEBUGF 1,"Gateway: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
448 | popa |
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449 | |||
450 | jmp next_option |
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451 | |||
452 | |||
453 | @@: |
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454 | cmp al, dhcp_domain_server |
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455 | jne next_option |
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456 | |||
457 | pusha |
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1170 | hidnplayr | 458 | mcall 75, 5, [edx] |
1164 | hidnplayr | 459 | DEBUGF 1,"DNS: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
460 | popa |
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461 | |||
462 | jmp next_option |
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463 | |||
464 | pr_exit: |
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465 | |||
466 | ; DEBUGF 1,"Sending ARP announce\n" |
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467 | ; eth.ARP_ANNOUNCE [dhcpClientIP] ; send an ARP announce packet |
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468 | |||
469 | jmp close |
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470 | |||
471 | apipa: |
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472 | stdcall mem.Free, [dhcpMsg] |
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473 | |||
474 | link_local: |
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475 | call random |
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476 | mov ecx,0xfea9 ; IP 169.254.0.0 link local net, see RFC3927 |
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477 | mov cx,ax |
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1196 | hidnplayr | 478 | mcall 75, 3, ecx ; mask is 255.255.0.0 |
1164 | hidnplayr | 479 | DEBUGF 1,"Link Local IP assinged: 169.254.%u.%u\n",[generator+2]:1,[generator+3]:1 |
1196 | hidnplayr | 480 | mcall 75, 5, 0xffff |
481 | mcall 75, 9, 0x0 |
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482 | mcall 75, 7, 0x0 |
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1164 | hidnplayr | 483 | |
484 | mcall 5, PROBE_WAIT*100 |
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485 | |||
486 | xor esi,esi |
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487 | probe_loop: |
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488 | call random ; create a pseudo random number in eax (seeded by MAC) |
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489 | |||
490 | cmp al,PROBE_MIN*100 ; check if al is bigger then PROBE_MIN |
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491 | jge @f ; all ok |
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492 | add al,(PROBE_MAX-PROBE_MIN)*100 ; al is too small |
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493 | @@: |
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494 | |||
495 | cmp al,PROBE_MAX*100 |
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496 | jle @f |
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497 | sub al,(PROBE_MAX-PROBE_MIN)*100 |
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498 | @@: |
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499 | |||
500 | movzx ebx,al |
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501 | DEBUGF 1,"Waiting %u0ms\n",ebx |
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502 | mcall 5 |
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503 | |||
504 | DEBUGF 1,"Sending Probe\n" |
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505 | ; eth.ARP_PROBE MAC |
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506 | inc esi |
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507 | |||
508 | cmp esi,PROBE_NUM |
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509 | jl probe_loop |
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510 | |||
511 | ; now we wait further ANNOUNCE_WAIT seconds and send ANNOUNCE_NUM ARP announces. If any other host has assingned |
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512 | ; IP within this time, we should create another adress, that have to be done later |
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513 | |||
514 | DEBUGF 1,"Waiting %us\n",ANNOUNCE_WAIT |
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515 | mcall 5, ANNOUNCE_WAIT*100 |
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516 | xor esi,esi |
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517 | announce_loop: |
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518 | |||
519 | DEBUGF 1,"Sending Announce\n" |
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520 | ; eth.ARP_ANNOUNCE MAC |
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521 | |||
522 | inc esi |
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523 | cmp esi,ANNOUNCE_NUM |
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524 | je @f |
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525 | |||
526 | DEBUGF 1,"Waiting %us\n",ANNOUNCE_INTERVAL |
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527 | mcall 5, ANNOUNCE_INTERVAL*100 |
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528 | jmp announce_loop |
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529 | @@: |
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530 | ; we should, instead of closing, detect ARP conflicts and detect if cable keeps connected ;) |
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531 | |||
532 | error: |
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533 | close: |
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534 | mcall -1 |
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535 | |||
536 | |||
537 | random: ; Pseudo random actually |
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538 | |||
539 | mov eax,[generator] |
||
540 | add eax,-43ab45b5h |
||
541 | ror eax,1 |
||
542 | bswap eax |
||
543 | xor eax,dword[MAC] |
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544 | ror eax,1 |
||
545 | xor eax,dword[MAC+2] |
||
546 | mov [generator],eax |
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547 | |||
548 | ret |
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549 | |||
550 | ; DATA AREA |
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551 | |||
552 | align 16 |
||
553 | @IMPORT: |
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554 | |||
555 | library \ |
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556 | libini,'libini.obj' |
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557 | |||
558 | import libini, \ |
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1196 | hidnplayr | 559 | ini.get_str,'ini_get_str' |
1164 | hidnplayr | 560 | |
561 | include_debug_strings |
||
562 | |||
563 | filename db '.ini',0 |
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564 | str_ip db 'ip',0 |
||
565 | str_subnet db 'subnet',0 |
||
566 | str_gateway db 'gateway',0 |
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567 | str_dns db 'dns',0 |
||
568 | str_ipconfig db 'ipconfig',0 |
||
569 | str_type db 'type',0 |
||
570 | |||
571 | |||
572 | sockaddr1: |
||
573 | |||
574 | dw AF_INET4 |
||
1196 | hidnplayr | 575 | dw 68 shl 8 ; local port |
1164 | hidnplayr | 576 | dd 0 ; local IP |
577 | |||
578 | rb 10 |
||
579 | |||
580 | |||
581 | sockaddr2: |
||
582 | |||
583 | dw AF_INET4 |
||
1196 | hidnplayr | 584 | dw 67 shl 8 ; destination port |
1164 | hidnplayr | 585 | dd -1 ; destination IP |
586 | |||
587 | rb 10 |
||
588 | |||
589 | |||
590 | IM_END: |
||
591 | |||
592 | inibuf rb 16 |
||
593 | |||
594 | dhcpClientIP dd ? |
||
595 | dhcpMsgType db ? |
||
596 | dhcpLease dd ? |
||
597 | dhcpServerIP dd ? |
||
598 | |||
599 | dhcpMsgLen dd ? |
||
600 | socketNum dd ? |
||
601 | |||
602 | MAC dp ? |
||
603 | |||
604 | currTime dd ? |
||
605 | renewTime dd ? |
||
606 | generator dd ? |
||
607 | |||
608 | dhcpMsg dd ? |
||
609 | |||
610 | I_END_2: |
||
611 | |||
612 | path rb 1024+5 |
||
613 | |||
614 | I_END: |