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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 | |||
45 | |||
46 | |||
1170 | hidnplayr | 47 | AF_INET4 equ 2 ;;;;; |
48 | IP_PROTO_UDP equ 17 |
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1164 | hidnplayr | 49 | |
50 | |||
51 | |||
52 | |||
1166 | hidnplayr | 53 | include '../proc32.inc' |
54 | include '../macros.inc' |
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55 | include '../debug-fdo.inc' |
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1164 | hidnplayr | 56 | include 'dhcp.inc' |
57 | include 'dll.inc' |
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58 | |||
59 | |||
60 | Ip2dword: |
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61 | push edx |
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62 | |||
63 | ; This code validates if the query is an IP containing 4 numbers and 3 dots |
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64 | |||
65 | xor al, al ; make al (dot count) zero |
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66 | |||
67 | @@: |
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68 | cmp byte[edx],'0' ; check if this byte is a number, if not jump to no_IP |
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69 | jl no_IP ; |
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70 | cmp byte[edx],'9' ; |
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71 | jg no_IP ; |
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72 | |||
73 | inc edx ; the byte was a number, so lets check the next byte |
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74 | |||
75 | cmp byte[edx],0 ; is this byte zero? (have we reached end of query?) |
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76 | jz @f ; jump to next @@ then |
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77 | cmp byte[edx],':' |
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78 | jz @f |
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79 | |||
80 | cmp byte[edx],'.' ; is this byte a dot? |
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81 | jne @r ; if not, jump to previous @@ |
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82 | |||
83 | inc al ; the byte was a dot so increment al(dot count) |
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84 | inc edx ; next byte |
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85 | jmp @r ; lets check for numbers again (jump to previous @@) |
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86 | |||
87 | @@: ; we reach this when end of query reached |
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88 | cmp al,3 ; check if there where 3 dots |
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89 | jnz no_IP ; if not, jump to no_IP |
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90 | |||
91 | ; The following code will convert this IP into a dword and output it in eax |
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92 | ; If there is also a port number specified, this will be returned in ebx, otherwise ebx is -1 |
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93 | |||
94 | pop esi ; edx (query address) was pushed onto stack and is now popped in esi |
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95 | |||
96 | xor edx, edx ; result |
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97 | xor eax, eax ; current character |
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98 | xor ebx, ebx ; current byte |
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99 | |||
100 | .outer_loop: |
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101 | shl edx, 8 |
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102 | add edx, ebx |
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103 | xor ebx, ebx |
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104 | .inner_loop: |
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105 | lodsb |
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106 | test eax, eax |
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107 | jz .finish |
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108 | cmp al, '.' |
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109 | jz .outer_loop |
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110 | sub eax, '0' |
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111 | imul ebx, 10 |
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112 | add ebx, eax |
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113 | jmp .inner_loop |
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114 | .finish: |
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115 | shl edx, 8 |
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116 | add edx, ebx |
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117 | |||
118 | bswap edx ; we want little endian order |
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119 | |||
120 | ret |
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121 | |||
122 | no_IP: |
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123 | pop edx |
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124 | xor edx, edx |
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125 | |||
126 | ret |
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127 | |||
128 | |||
129 | |||
130 | |||
131 | |||
132 | |||
133 | START: ; start of execution |
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134 | |||
135 | mcall 40, 1 shl 7 ; network event |
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136 | |||
137 | ; eth.set_network_drv 0x00000383 |
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138 | |||
1170 | hidnplayr | 139 | DEBUGF 1,">Zero-config service:\n" |
1164 | hidnplayr | 140 | |
141 | ; eth.status eax ; Read the Stack status |
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142 | ; test eax,eax ; if eax is zero, no driver was found |
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143 | ; jnz @f |
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144 | ; DEBUGF 1,"No Card found!\n" |
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145 | ; jmp close |
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146 | |||
147 | ; @@: |
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148 | ; DEBUGF 1,"Detected card: %x\n",eax |
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149 | ; @@: |
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150 | ; eth.check_cable eax |
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151 | ; test al,al |
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152 | ; jnz @f |
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153 | ; DEBUGF 1,"Cable disconnected!\n" |
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154 | ; mcall 5, 500 ; loop until cable is connected (check every 5 sec) |
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155 | ; jmp @r |
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156 | |||
157 | ; @@: |
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158 | ; eth.read_mac MAC |
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159 | |||
1170 | hidnplayr | 160 | mcall 75, 1337 shl 16 + 4 |
1174 | hidnplayr | 161 | |
162 | cmp eax, -1 |
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163 | je close |
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164 | |||
1164 | hidnplayr | 165 | mov word[MAC], bx |
166 | mov dword[MAC+2], eax |
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167 | |||
1170 | hidnplayr | 168 | 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 | 169 | |
170 | cld |
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171 | mov edi, path ; Calculate the length of zero-terminated string |
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172 | xor al , al |
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173 | mov ecx, 1024 |
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174 | repnz scas byte[es:edi] |
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175 | dec edi |
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176 | |||
177 | mov esi, filename |
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178 | movsd |
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179 | movsb |
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180 | |||
1170 | hidnplayr | 181 | DEBUGF 1,"->path to ini: %s\n", path |
1164 | hidnplayr | 182 | |
183 | mcall 68,11 |
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184 | |||
185 | stdcall dll.Load,@IMPORT |
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186 | or eax,eax |
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187 | jnz skip_ini |
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188 | |||
189 | |||
190 | invoke ini.get_str, path, str_ipconfig, str_type, inibuf, 16, 0 |
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191 | |||
192 | mov eax,dword[inibuf] |
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193 | |||
194 | cmp eax,'stat' |
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195 | jne skip_ini |
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196 | |||
197 | invoke ini.get_str, path, str_ipconfig, str_ip, 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, 3, edx |
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201 | |||
202 | invoke ini.get_str, path, str_ipconfig, str_gateway, 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, 9, edx |
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206 | |||
207 | invoke ini.get_str, path, str_ipconfig, str_dns, 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, 7, edx |
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211 | |||
212 | invoke ini.get_str, path, str_ipconfig, str_subnet, inibuf, 16, 0 |
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213 | mov edx, inibuf |
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214 | call Ip2dword |
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215 | mcall 73, 5, edx |
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216 | |||
217 | |||
218 | mcall -1 |
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219 | |||
220 | |||
221 | skip_ini: |
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222 | |||
1170 | hidnplayr | 223 | DEBUGF 1,"->Skip ini\n" |
1164 | hidnplayr | 224 | |
1170 | hidnplayr | 225 | mcall 74, 0, AF_INET4, IP_PROTO_UDP, 0 ; open socket (parameters: domain, type, reserved) |
1164 | hidnplayr | 226 | cmp eax, -1 |
227 | je error |
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228 | mov [socketNum], eax |
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229 | |||
1170 | hidnplayr | 230 | DEBUGF 1,"->socket %x opened\n", eax |
1164 | hidnplayr | 231 | |
232 | mcall 74, 2, [socketNum], sockaddr1, 18 ; bind socket to local port 68 |
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233 | cmp eax, -1 |
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234 | je error |
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235 | |||
1170 | hidnplayr | 236 | DEBUGF 1,"->Socket Bound to local port 68\n" |
1164 | hidnplayr | 237 | |
238 | mcall 74, 4, [socketNum], sockaddr2, 18 ; connect to 255.255.255.255 on port 67 |
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239 | cmp eax, -1 |
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240 | je error |
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241 | |||
1170 | hidnplayr | 242 | DEBUGF 1,"->Connected to 255.255.255.255 on port 67\n" |
1164 | hidnplayr | 243 | |
244 | mov byte [dhcpMsgType], 0x01 ; DHCP discover |
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245 | mov dword [dhcpLease], esi ; esi is still -1 (-1 = forever) |
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246 | |||
247 | mcall 26, 9 |
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248 | imul eax,100 |
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249 | mov [currTime],eax |
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250 | |||
251 | buildRequest: ; Creates a DHCP request packet. |
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252 | |||
1170 | hidnplayr | 253 | DEBUGF 1,"->Building request\n" |
1164 | hidnplayr | 254 | |
255 | stdcall mem.Alloc, BUFFER |
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256 | mov [dhcpMsg], eax |
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257 | test eax,eax |
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258 | jz apipa |
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259 | |||
260 | |||
261 | mov edi, eax |
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262 | mov ecx,BUFFER |
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263 | xor eax,eax |
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264 | cld |
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265 | rep stosb |
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266 | |||
267 | mov edx,[dhcpMsg] |
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268 | |||
269 | mov [edx], byte 0x01 ; Boot request |
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270 | mov [edx+1], byte 0x01 ; Ethernet |
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271 | mov [edx+2], byte 0x06 ; Ethernet h/w len |
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272 | mov [edx+4], dword 0x11223344 ; xid |
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273 | mov eax,[currTime] |
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274 | mov [edx+8], eax ; secs, our uptime |
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275 | mov [edx+10], byte 0x80 ; broadcast flag set |
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276 | mov eax, dword [MAC] ; first 4 bytes of MAC |
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277 | mov [edx+28],dword eax |
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278 | mov ax, word [MAC+4] ; last 2 bytes of MAC |
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279 | mov [edx+32],word ax |
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280 | mov [edx+236], dword 0x63538263 ; magic number |
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281 | mov [edx+240], word 0x0135 ; option DHCP msg type |
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282 | mov al, [dhcpMsgType] |
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283 | mov [edx+240+2], al |
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284 | mov [edx+240+3], word 0x0433 ; option Lease time = infinity |
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285 | mov eax, [dhcpLease] |
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286 | mov [edx+240+5], eax |
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287 | mov [edx+240+9], word 0x0432 ; option requested IP address |
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288 | mov eax, [dhcpClientIP] |
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289 | mov [edx+240+11], eax |
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290 | mov [edx+240+15], word 0x0437 ; option request list |
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291 | mov [edx+240+17], dword 0x0f060301 |
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292 | |||
293 | cmp [dhcpMsgType], byte 0x01 ; Check which msg we are sending |
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294 | jne request_options |
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295 | |||
296 | mov [edx+240+21], byte 0xff ; "Discover" options |
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297 | |||
298 | mov [dhcpMsgLen], dword 262 ; end of options marker |
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299 | jmp send_request |
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300 | |||
301 | request_options: |
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302 | mov [edx+240+21], word 0x0436 ; server IP |
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303 | mov eax, [dhcpServerIP] |
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304 | mov [edx+240+23], eax |
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305 | |||
306 | mov [edx+240+27], byte 0xff ; end of options marker |
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307 | |||
308 | mov [dhcpMsgLen], dword 268 |
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309 | |||
310 | send_request: |
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311 | mcall 74, 6, [socketNum], [dhcpMsg], [dhcpMsgLen] ; write to socket ( send broadcast request ) |
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312 | |||
313 | mov eax, [dhcpMsg] ; Setup the DHCP buffer to receive response |
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314 | mov [dhcpMsgLen], eax ; Used as a pointer to the data |
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315 | |||
316 | mcall 23, TIMEOUT*10 ; wait for data |
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317 | |||
318 | read_data: ; we have data - this will be the response |
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319 | |||
320 | mcall 74, 7, [socketNum], [dhcpMsg], BUFFER ; read data from socket |
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321 | |||
1170 | hidnplayr | 322 | DEBUGF 1,"->%d bytes received\n", eax |
1164 | hidnplayr | 323 | |
324 | push eax |
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1170 | hidnplayr | 325 | mcall 74, 1, [socketNum] ; close the socket |
1164 | hidnplayr | 326 | pop eax |
327 | |||
328 | cmp eax, -1 |
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329 | je error |
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330 | |||
331 | mov [dhcpMsgLen], eax |
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332 | |||
333 | ; depending on which msg we sent, handle the response |
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334 | ; accordingly. |
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335 | ; If the response is to a dhcp discover, then: |
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336 | ; 1) If response is DHCP OFFER then |
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337 | ; 1.1) record server IP, lease time & IP address. |
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338 | ; 1.2) send a request packet |
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339 | ; If the response is to a dhcp request, then: |
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340 | ; 1) If the response is DHCP ACK then |
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341 | ; 1.1) extract the DNS & subnet fields. Set them in the stack |
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342 | |||
343 | cmp [dhcpMsgType], byte 0x01 ; did we send a discover? |
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344 | je discover |
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345 | cmp [dhcpMsgType], byte 0x03 ; did we send a request? |
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346 | je request |
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347 | |||
348 | jmp close ; really unknown, what we did |
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349 | |||
350 | discover: |
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351 | call parseResponse |
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352 | |||
353 | cmp [dhcpMsgType], byte 0x02 ; Was the response an offer? |
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354 | jne apipa ; NO - so we do zeroconf |
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355 | mov [dhcpMsgType], byte 0x03 ; DHCP request |
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356 | jmp buildRequest |
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357 | |||
358 | request: |
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359 | call parseResponse |
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360 | |||
361 | cmp [dhcpMsgType], byte 0x05 ; Was the response an ACK? It should be |
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362 | jne apipa ; NO - so we do zeroconf |
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363 | |||
364 | jmp close |
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365 | |||
366 | ;*************************************************************************** |
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367 | ; Function |
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368 | ; parseResponse |
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369 | ; |
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370 | ; Description |
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371 | ; extracts the fields ( client IP address and options ) from |
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372 | ; a DHCP response |
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373 | ; The values go into |
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374 | ; dhcpMsgType,dhcpLease,dhcpClientIP,dhcpServerIP, |
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375 | ; dhcpDNSIP, dhcpSubnet |
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376 | ; The message is stored in dhcpMsg |
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377 | ; |
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378 | ;*************************************************************************** |
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379 | parseResponse: |
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380 | DEBUGF 1,"Data received, parsing response\n" |
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381 | mov edx, [dhcpMsg] |
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382 | |||
383 | pusha |
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1170 | hidnplayr | 384 | mcall 75, 3, [edx+16] |
1164 | hidnplayr | 385 | mov eax,[edx] |
386 | mov [dhcpClientIP],eax |
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387 | DEBUGF 1,"Client: %u.%u.%u.%u\n",[edx+16]:1,[edx+17]:1,[edx+18]:1,[edx+19]:1 |
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388 | popa |
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389 | |||
390 | add edx, 240 ; Point to first option |
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391 | xor ecx, ecx |
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392 | |||
393 | next_option: |
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394 | add edx, ecx |
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395 | pr001: |
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396 | mov al, [edx] |
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397 | cmp al, 0xff ; End of options? |
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398 | je pr_exit |
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399 | |||
400 | cmp al, dhcp_msg_type ; Msg type is a single byte option |
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401 | jne @f |
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402 | |||
403 | mov al, [edx+2] |
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404 | mov [dhcpMsgType], al |
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405 | add edx, 3 |
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406 | jmp pr001 ; Get next option |
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407 | |||
408 | @@: |
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409 | inc edx |
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410 | movzx ecx, byte [edx] |
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411 | inc edx ; point to data |
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412 | |||
413 | cmp al, dhcp_dhcp_server_id ; server ip |
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414 | jne @f |
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415 | mov eax, [edx] |
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416 | mov [dhcpServerIP], eax |
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417 | DEBUGF 1,"Server: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
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418 | jmp next_option |
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419 | |||
420 | @@: |
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421 | cmp al, dhcp_address_time |
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422 | jne @f |
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423 | |||
424 | pusha |
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425 | mov eax,[edx] |
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426 | bswap eax |
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427 | mov [dhcpLease],eax |
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428 | DEBUGF 1,"lease: %d\n",eax |
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429 | popa |
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430 | |||
431 | jmp next_option |
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432 | |||
433 | @@: |
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434 | cmp al, dhcp_subnet_mask |
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435 | jne @f |
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436 | |||
437 | pusha |
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1170 | hidnplayr | 438 | mcall 75, 7, [edx] |
1164 | hidnplayr | 439 | DEBUGF 1,"Subnet: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
440 | popa |
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441 | |||
442 | jmp next_option |
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443 | |||
444 | @@: |
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445 | cmp al, dhcp_router |
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446 | jne @f |
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447 | |||
448 | pusha |
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1170 | hidnplayr | 449 | mcall 75, 9, [edx] |
1164 | hidnplayr | 450 | DEBUGF 1,"Gateway: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
451 | popa |
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452 | |||
453 | jmp next_option |
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454 | |||
455 | |||
456 | @@: |
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457 | cmp al, dhcp_domain_server |
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458 | jne next_option |
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459 | |||
460 | pusha |
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1170 | hidnplayr | 461 | mcall 75, 5, [edx] |
1164 | hidnplayr | 462 | DEBUGF 1,"DNS: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
463 | popa |
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464 | |||
465 | jmp next_option |
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466 | |||
467 | pr_exit: |
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468 | |||
469 | ; DEBUGF 1,"Sending ARP announce\n" |
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470 | ; eth.ARP_ANNOUNCE [dhcpClientIP] ; send an ARP announce packet |
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471 | |||
472 | jmp close |
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473 | |||
474 | apipa: |
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475 | stdcall mem.Free, [dhcpMsg] |
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476 | |||
477 | link_local: |
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478 | call random |
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479 | mov ecx,0xfea9 ; IP 169.254.0.0 link local net, see RFC3927 |
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480 | mov cx,ax |
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481 | mcall 73, 3, ecx ; mask is 255.255.0.0 |
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482 | DEBUGF 1,"Link Local IP assinged: 169.254.%u.%u\n",[generator+2]:1,[generator+3]:1 |
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483 | mcall 73, 5, 0xffff |
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484 | mcall 73, 9, 0x0 |
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485 | mcall 73, 7, 0x0 |
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486 | |||
487 | mcall 5, PROBE_WAIT*100 |
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488 | |||
489 | xor esi,esi |
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490 | probe_loop: |
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491 | call random ; create a pseudo random number in eax (seeded by MAC) |
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492 | |||
493 | cmp al,PROBE_MIN*100 ; check if al is bigger then PROBE_MIN |
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494 | jge @f ; all ok |
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495 | add al,(PROBE_MAX-PROBE_MIN)*100 ; al is too small |
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496 | @@: |
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497 | |||
498 | cmp al,PROBE_MAX*100 |
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499 | jle @f |
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500 | sub al,(PROBE_MAX-PROBE_MIN)*100 |
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501 | @@: |
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502 | |||
503 | movzx ebx,al |
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504 | DEBUGF 1,"Waiting %u0ms\n",ebx |
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505 | mcall 5 |
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506 | |||
507 | DEBUGF 1,"Sending Probe\n" |
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508 | ; eth.ARP_PROBE MAC |
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509 | inc esi |
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510 | |||
511 | cmp esi,PROBE_NUM |
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512 | jl probe_loop |
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513 | |||
514 | ; now we wait further ANNOUNCE_WAIT seconds and send ANNOUNCE_NUM ARP announces. If any other host has assingned |
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515 | ; IP within this time, we should create another adress, that have to be done later |
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516 | |||
517 | DEBUGF 1,"Waiting %us\n",ANNOUNCE_WAIT |
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518 | mcall 5, ANNOUNCE_WAIT*100 |
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519 | xor esi,esi |
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520 | announce_loop: |
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521 | |||
522 | DEBUGF 1,"Sending Announce\n" |
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523 | ; eth.ARP_ANNOUNCE MAC |
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524 | |||
525 | inc esi |
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526 | cmp esi,ANNOUNCE_NUM |
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527 | je @f |
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528 | |||
529 | DEBUGF 1,"Waiting %us\n",ANNOUNCE_INTERVAL |
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530 | mcall 5, ANNOUNCE_INTERVAL*100 |
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531 | jmp announce_loop |
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532 | @@: |
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533 | ; we should, instead of closing, detect ARP conflicts and detect if cable keeps connected ;) |
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534 | |||
535 | error: |
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536 | close: |
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537 | mcall -1 |
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538 | |||
539 | |||
540 | random: ; Pseudo random actually |
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541 | |||
542 | mov eax,[generator] |
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543 | add eax,-43ab45b5h |
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544 | ror eax,1 |
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545 | bswap eax |
||
546 | xor eax,dword[MAC] |
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547 | ror eax,1 |
||
548 | xor eax,dword[MAC+2] |
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549 | mov [generator],eax |
||
550 | |||
551 | ret |
||
552 | |||
553 | ; DATA AREA |
||
554 | |||
555 | align 16 |
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556 | @IMPORT: |
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557 | |||
558 | library \ |
||
559 | libini,'libini.obj' |
||
560 | |||
561 | import libini, \ |
||
562 | ini.get_str,'ini.get_str' |
||
563 | |||
564 | include_debug_strings |
||
565 | |||
566 | filename db '.ini',0 |
||
567 | str_ip db 'ip',0 |
||
568 | str_subnet db 'subnet',0 |
||
569 | str_gateway db 'gateway',0 |
||
570 | str_dns db 'dns',0 |
||
571 | str_ipconfig db 'ipconfig',0 |
||
572 | str_type db 'type',0 |
||
573 | |||
574 | |||
575 | sockaddr1: |
||
576 | |||
577 | dw AF_INET4 |
||
578 | dw 68 ; local port |
||
579 | dd 0 ; local IP |
||
580 | |||
581 | rb 10 |
||
582 | |||
583 | |||
584 | sockaddr2: |
||
585 | |||
586 | dw AF_INET4 |
||
587 | dw 67 ; destination port |
||
588 | dd -1 ; destination IP |
||
589 | |||
590 | rb 10 |
||
591 | |||
592 | |||
593 | IM_END: |
||
594 | |||
595 | inibuf rb 16 |
||
596 | |||
597 | dhcpClientIP dd ? |
||
598 | dhcpMsgType db ? |
||
599 | dhcpLease dd ? |
||
600 | dhcpServerIP dd ? |
||
601 | |||
602 | dhcpMsgLen dd ? |
||
603 | socketNum dd ? |
||
604 | |||
605 | MAC dp ? |
||
606 | |||
607 | currTime dd ? |
||
608 | renewTime dd ? |
||
609 | generator dd ? |
||
610 | |||
611 | dhcpMsg dd ? |
||
612 | |||
613 | I_END_2: |
||
614 | |||
615 | path rb 1024+5 |
||
616 | |||
617 | I_END: |