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3545 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2010-2013. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;; zeroconfig.asm - Zeroconfig service for KolibriOS ;; |
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7 | ;; ;; |
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8 | ;; Written by hidnplayr@kolibrios.org ;; |
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9 | ;; Some code contributed by Derpenguin ;; |
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10 | ;; ;; |
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11 | ;; DHCP code is based on that by Mike Hibbet ;; |
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12 | ; (DHCP client for menuetos) ;; |
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13 | ;; ;; |
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14 | ;; GNU GENERAL PUBLIC LICENSE ;; |
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15 | ;; Version 2, June 1991 ;; |
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16 | ;; ;; |
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17 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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18 | |||
19 | format binary as "" |
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20 | |||
21 | use32 |
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22 | org 0x0 |
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23 | |||
24 | db 'MENUET01' ; 8 byte id |
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25 | dd 0x01 ; header version |
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26 | dd START ; start of code |
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27 | dd IM_END ; size of image |
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28 | dd (I_END+0x100) ; memory for app |
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29 | dd (I_END+0x100) ; esp |
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30 | dd 0, 0 ; I_Param, I_Path |
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31 | |||
32 | ; CONFIGURATION |
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33 | |||
34 | TIMEOUT = 60 ; in seconds |
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35 | BUFFER = 1024 ; in bytes |
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36 | __DEBUG__ = 1 ; enable/disable |
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37 | __DEBUG_LEVEL__ = 1 ; 1 = all, 2 = errors |
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38 | |||
39 | ; CONFIGURATION FOR LINK-LOCAL |
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40 | |||
41 | PROBE_WAIT = 1 ; second (initial random delay) |
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42 | PROBE_MIN = 1 ; second (minimum delay till repeated probe) |
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43 | PROBE_MAX = 2 ; seconds (maximum delay till repeated probe) |
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44 | PROBE_NUM = 3 ; (number of probe packets) |
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45 | |||
46 | ANNOUNCE_NUM = 2 ; (number of announcement packets) |
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47 | ANNOUNCE_INTERVAL = 2 ; seconds (time between announcement packets) |
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48 | ANNOUNCE_WAIT = 2 ; seconds (delay before announcing) |
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49 | |||
50 | MAX_CONFLICTS = 10 ; (max conflicts before rate limiting) |
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51 | |||
52 | RATE_LIMIT_INTERVAL = 60 ; seconds (delay between successive attempts) |
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53 | |||
54 | DEFEND_INTERVAL = 10 ; seconds (min. wait between defensive ARPs) |
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55 | |||
56 | |||
57 | include '../proc32.inc' |
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58 | include '../macros.inc' |
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59 | include '../debug-fdo.inc' |
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60 | include '../network.inc' |
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61 | include 'dhcp.inc' |
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62 | include '../dll.inc' |
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63 | |||
64 | |||
65 | Ip2dword: |
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66 | push edx |
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67 | |||
68 | ; This code validates if the query is an IP containing 4 numbers and 3 dots |
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69 | |||
70 | xor al, al ; make al (dot count) zero |
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71 | |||
72 | @@: |
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73 | cmp byte[edx],'0' ; check if this byte is a number, if not jump to no_IP |
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74 | jl no_IP ; |
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75 | cmp byte[edx],'9' ; |
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76 | jg no_IP ; |
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77 | |||
78 | inc edx ; the byte was a number, so lets check the next byte |
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79 | |||
80 | cmp byte[edx],0 ; is this byte zero? (have we reached end of query?) |
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81 | jz @f ; jump to next @@ then |
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82 | cmp byte[edx],':' |
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83 | jz @f |
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84 | |||
85 | cmp byte[edx],'.' ; is this byte a dot? |
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86 | jne @r ; if not, jump to previous @@ |
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87 | |||
88 | inc al ; the byte was a dot so increment al(dot count) |
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89 | inc edx ; next byte |
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90 | jmp @r ; lets check for numbers again (jump to previous @@) |
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91 | |||
92 | @@: ; we reach this when end of query reached |
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93 | cmp al,3 ; check if there where 3 dots |
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94 | jnz no_IP ; if not, jump to no_IP |
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95 | |||
96 | ; The following code will convert this IP into a dword and output it in eax |
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97 | ; If there is also a port number specified, this will be returned in ebx, otherwise ebx is -1 |
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98 | |||
99 | pop esi ; edx (query address) was pushed onto stack and is now popped in esi |
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100 | |||
101 | xor edx, edx ; result |
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102 | xor eax, eax ; current character |
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103 | xor ebx, ebx ; current byte |
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104 | |||
105 | .outer_loop: |
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106 | shl edx, 8 |
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107 | add edx, ebx |
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108 | xor ebx, ebx |
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109 | .inner_loop: |
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110 | lodsb |
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111 | test eax, eax |
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112 | jz .finish |
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113 | cmp al, '.' |
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114 | jz .outer_loop |
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115 | sub eax, '0' |
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116 | imul ebx, 10 |
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117 | add ebx, eax |
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118 | jmp .inner_loop |
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119 | .finish: |
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120 | shl edx, 8 |
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121 | add edx, ebx |
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122 | |||
123 | bswap edx ; we want little endian order |
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124 | |||
125 | ret |
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126 | |||
127 | no_IP: |
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128 | pop edx |
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129 | xor edx, edx |
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130 | |||
131 | ret |
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132 | |||
133 | |||
134 | |||
135 | |||
136 | |||
137 | |||
138 | START: |
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139 | mcall 40, EVM_STACK2 |
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140 | |||
141 | DEBUGF 1,">Zero-config service loaded\n" |
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142 | |||
143 | .wait: |
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144 | mcall 76, API_ETH + 4 ; get MAC of ethernet interface 0 |
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145 | cmp eax, -1 |
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146 | jne .start |
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147 | |||
148 | mcall 10 |
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149 | jmp .wait |
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150 | |||
151 | .start: |
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152 | mov word[MAC], bx |
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153 | mov dword[MAC+2], eax |
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154 | DEBUGF 1,"->MAC: %x-%x-%x-%x-%x-%x\n", [MAC+0]:2, [MAC+1]:2, [MAC+2]:2, [MAC+3]:2, [MAC+4]:2, [MAC+5]:2 |
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155 | |||
156 | mcall 40, EVM_STACK |
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157 | |||
158 | mcall 68, 11 |
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159 | |||
160 | stdcall dll.Load,@IMPORT |
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161 | or eax, eax |
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162 | jnz try_dhcp |
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163 | |||
164 | invoke ini.get_str, path, str_ipconfig, str_type, inibuf, 16, 0 |
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165 | |||
166 | cmp dword[inibuf], 'stat' |
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167 | jne try_dhcp |
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168 | |||
169 | invoke ini.get_str, path, str_ipconfig, str_ip, inibuf, 16, 0 |
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170 | mov edx, inibuf |
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171 | call Ip2dword |
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172 | mcall 76, API_IPv4 + 3, edx |
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173 | |||
174 | invoke ini.get_str, path, str_ipconfig, str_gateway, inibuf, 16, 0 |
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175 | mov edx, inibuf |
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176 | call Ip2dword |
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177 | mcall 76, API_IPv4 + 9, edx |
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178 | |||
179 | invoke ini.get_str, path, str_ipconfig, str_dns, inibuf, 16, 0 |
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180 | mov edx, inibuf |
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181 | call Ip2dword |
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182 | mcall 76, API_IPv4 + 5, edx |
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183 | |||
184 | invoke ini.get_str, path, str_ipconfig, str_subnet, inibuf, 16, 0 |
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185 | mov edx, inibuf |
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186 | call Ip2dword |
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187 | mcall 76, API_IPv4 + 7, edx |
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188 | |||
189 | |||
190 | mcall -1 |
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191 | |||
192 | |||
193 | try_dhcp: |
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194 | |||
195 | DEBUGF 1,"->Trying DHCP\n" |
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196 | |||
197 | mcall 75, 0, AF_INET4, SOCK_DGRAM, 0 ; open socket (parameters: domain, type, reserved) |
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198 | cmp eax, -1 |
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199 | je error |
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200 | mov [socketNum], eax |
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201 | |||
202 | DEBUGF 1,"->Socket %x opened\n", eax |
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203 | |||
204 | mcall 75, 2, [socketNum], sockaddr1, 18 ; bind socket to local port 68 |
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205 | cmp eax, -1 |
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206 | je error |
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207 | |||
208 | DEBUGF 1,"->Socket Bound to local port 68\n" |
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209 | |||
210 | mcall 75, 4, [socketNum], sockaddr2, 18 ; connect to 255.255.255.255 on port 67 |
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211 | cmp eax, -1 |
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212 | je error |
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213 | |||
214 | DEBUGF 1,"->Connected to 255.255.255.255 on port 67\n" |
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215 | |||
216 | mov [dhcpMsgType], 0x01 ; DHCP discover |
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217 | mov [dhcpLease], esi ; esi is still -1 (-1 = forever) |
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218 | |||
219 | mcall 26, 9 ; Get system time |
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220 | imul eax, 100 |
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221 | mov [currTime], eax |
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222 | |||
223 | build_request: ; Creates a DHCP request packet. |
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224 | |||
225 | DEBUGF 1,"->Building request\n" |
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226 | |||
227 | stdcall mem.Alloc, BUFFER |
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228 | mov [dhcpMsg], eax |
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229 | test eax, eax |
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230 | jz dhcp_error |
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231 | |||
232 | ;;; todo: skip this bullcrap |
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233 | |||
234 | mov edi, eax |
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235 | mov ecx, BUFFER |
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236 | xor eax, eax |
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237 | rep stosb |
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238 | |||
239 | ;; todo: put this in a buffer instead of writing bytes and words! |
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240 | |||
241 | mov edx, [dhcpMsg] |
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242 | |||
243 | ; Boot protocol legacy |
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244 | mov [edx], byte 0x01 ; Boot request |
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245 | mov [edx+1], byte 0x01 ; Ethernet |
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246 | mov [edx+2], byte 0x06 ; Ethernet h/w len |
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247 | mov [edx+4], dword 0x11223344 ; xid ;;;;;;; |
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248 | mov eax, [currTime] |
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249 | mov [edx+8], eax ; secs, our uptime |
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250 | mov [edx+10], byte 0x80 ; broadcast flag set |
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251 | mov eax, dword [MAC] ; first 4 bytes of MAC |
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252 | mov [edx+28],dword eax |
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253 | mov ax, word [MAC+4] ; last 2 bytes of MAC |
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254 | mov [edx+32],word ax |
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255 | |||
256 | ; DHCP extension |
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257 | mov [edx+236], dword 0x63538263 ; magic cookie |
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258 | mov [edx+240], word 0x0135 ; option DHCP msg type |
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259 | mov al, [dhcpMsgType] |
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260 | mov [edx+240+2], al |
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261 | mov [edx+240+3], word 0x0433 ; option Lease time = infinity |
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262 | mov eax, [dhcpLease] |
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263 | mov [edx+240+5], eax |
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264 | mov [edx+240+9], word 0x0432 ; option requested IP address |
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265 | mov eax, [dhcp.ip] |
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266 | mov [edx+240+11], eax |
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267 | mov [edx+240+15], word 0x0437 ; option request list |
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268 | mov [edx+240+17], dword 0x0f060301 |
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269 | |||
270 | cmp [dhcpMsgType], byte 0x01 ; Check which msg we are sending |
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271 | jne request_options |
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272 | |||
273 | mov [edx+240+21], byte 0xff ; "Discover" options |
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274 | |||
275 | mov [dhcpMsgLen], dword 262 ; end of options marker |
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276 | jmp send_dhcpmsg |
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277 | |||
278 | request_options: |
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279 | mov [edx+240+21], word 0x0436 ; server IP |
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280 | mov eax, [dhcpServerIP] |
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281 | mov [edx+240+23], eax |
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282 | |||
283 | mov [edx+240+27], byte 0xff ; end of options marker |
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284 | |||
285 | mov [dhcpMsgLen], dword 268 |
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286 | |||
287 | send_dhcpmsg: |
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288 | mcall 75, 6, [socketNum], [dhcpMsg], [dhcpMsgLen] ; write to socket ( send broadcast request ) |
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289 | |||
290 | mov eax, [dhcpMsg] ; Setup the DHCP buffer to receive response |
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291 | mov [dhcpMsgLen], eax ; Used as a pointer to the data |
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292 | |||
293 | mcall 23, TIMEOUT*10 ; wait for data |
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294 | |||
295 | read_data: ; we have data - this will be the response |
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3562 | hidnplayr | 296 | mcall 75, 7, [socketNum], [dhcpMsg], BUFFER, 0 ; read data from socket |
3545 | hidnplayr | 297 | |
298 | DEBUGF 1,"->%d bytes received\n", eax |
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299 | |||
300 | cmp eax, -1 |
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301 | je dhcp_error |
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302 | |||
303 | mov [dhcpMsgLen], eax |
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304 | |||
305 | ; depending on which msg we sent, handle the response |
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306 | ; accordingly. |
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307 | ; If the response is to a dhcp discover, then: |
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308 | ; 1) If response is DHCP OFFER then |
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309 | ; 1.1) record server IP, lease time & IP address. |
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310 | ; 1.2) send a request packet |
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311 | ; If the response is to a dhcp request, then: |
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312 | ; 1) If the response is DHCP ACK then |
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313 | ; 1.1) extract the DNS & subnet fields. Set them in the stack |
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314 | |||
315 | cmp [dhcpMsgType], 0x01 ; did we send a discover? |
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316 | je discover |
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317 | |||
318 | cmp [dhcpMsgType], 0x03 ; did we send a request? |
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319 | je request |
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320 | |||
321 | call dhcp_end ; we should never reach here ;) |
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322 | jmp exit |
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323 | |||
324 | discover: |
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325 | call parse_response |
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326 | |||
327 | cmp [dhcpMsgType], 0x02 ; Was the response an offer? |
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328 | je send_request |
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329 | |||
330 | call dhcp_end |
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331 | jmp link_local |
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332 | |||
333 | send_request: |
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334 | mov [dhcpMsgType], 0x03 ; make it a request |
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335 | jmp build_request |
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336 | |||
337 | request: |
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338 | call parse_response |
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339 | |||
340 | cmp [dhcpMsgType], 0x05 ; Was the response an ACK? It should be |
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341 | jne read_data ; NO - read next packets |
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342 | |||
343 | call dhcp_end |
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344 | |||
345 | mcall 76, API_IPv4 + 3, [dhcp.ip] ; ip |
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346 | mcall 76, API_IPv4 + 5, [dhcp.dns] ; dns |
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347 | mcall 76, API_IPv4 + 7, [dhcp.subnet] ; subnet |
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348 | mcall 76, API_IPv4 + 9, [dhcp.gateway] ; gateway |
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349 | |||
350 | jmp exit |
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351 | |||
352 | dhcp_end: |
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353 | mcall close, [socketNum] |
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354 | stdcall mem.Free, [dhcpMsg] |
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355 | |||
356 | ret |
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357 | |||
358 | ;*************************************************************************** |
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359 | ; Function |
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360 | ; parseResponse |
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361 | ; |
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362 | ; Description |
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363 | ; extracts the fields ( client IP address and options ) from |
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364 | ; a DHCP response |
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365 | ; The values go into |
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366 | ; dhcpMsgType,dhcpLease,dhcpClientIP,dhcpServerIP, |
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367 | ; dhcpDNSIP, dhcpSubnet |
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368 | ; The message is stored in dhcpMsg |
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369 | ; |
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370 | ;*************************************************************************** |
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371 | parse_response: |
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372 | |||
373 | DEBUGF 1,"Data received, parsing response\n" |
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374 | mov edx, [dhcpMsg] |
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375 | |||
376 | push dword [edx+16] |
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377 | pop [dhcp.ip] |
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378 | DEBUGF 1,"Client: %u.%u.%u.%u\n", [edx+16]:1, [edx+17]:1, [edx+18]:1, [edx+19]:1 |
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379 | |||
380 | ; TODO: check if there really are options |
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381 | |||
382 | mov al, 240 ; Point to first option |
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383 | movzx ecx, al |
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384 | |||
385 | .next_option: |
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386 | add edx, ecx |
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387 | |||
388 | mov al, [edx] ; get message identifier |
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389 | |||
390 | cmp al, 0xff ; End of options? |
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391 | je .done |
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392 | |||
393 | cmp al, 0 |
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394 | je .pad |
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395 | |||
396 | ; TODO: check if we still are inside the buffer |
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397 | |||
398 | inc edx |
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399 | movzx ecx, byte [edx] ; get data length |
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400 | inc edx ; point to data |
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401 | |||
402 | cmp al, dhcp_msg_type ; Msg type is a single byte option |
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403 | je .msgtype |
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404 | |||
405 | cmp al, dhcp_dhcp_server_id |
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406 | je .server |
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407 | |||
408 | cmp al, dhcp_address_time |
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409 | je .lease |
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410 | |||
411 | cmp al, dhcp_subnet_mask |
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412 | je .subnet |
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413 | |||
414 | cmp al, dhcp_router |
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415 | je .router |
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416 | |||
417 | cmp al, dhcp_domain_server |
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418 | je .dns |
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419 | |||
420 | DEBUGF 1,"Unsupported DHCP option: %u\n", al |
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421 | |||
422 | jmp .next_option |
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423 | |||
424 | .pad: |
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425 | xor ecx, ecx |
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426 | inc ecx |
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427 | jmp .next_option |
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428 | |||
429 | .msgtype: |
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430 | mov al, [edx] |
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431 | mov [dhcpMsgType], al |
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432 | |||
433 | DEBUGF 1,"DHCP Msg type: %u\n", al |
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434 | jmp .next_option ; Get next option |
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435 | |||
436 | .server: |
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437 | mov eax, [edx] |
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438 | mov [dhcpServerIP], eax |
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439 | DEBUGF 1,"Server: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
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440 | jmp .next_option |
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441 | |||
442 | .lease: |
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443 | pusha |
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444 | mov eax,[edx] |
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445 | bswap eax |
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446 | mov [dhcpLease],eax |
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447 | DEBUGF 1,"lease: %d\n",eax |
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448 | popa |
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449 | jmp .next_option |
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450 | |||
451 | .subnet: |
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452 | push dword [edx] |
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453 | pop [dhcp.subnet] |
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454 | DEBUGF 1,"Subnet: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
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455 | jmp .next_option |
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456 | |||
457 | .router: |
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458 | push dword [edx] |
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459 | pop [dhcp.gateway] |
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460 | DEBUGF 1,"Gateway: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
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461 | jmp .next_option |
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462 | |||
463 | .dns: |
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464 | push dword [edx] |
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465 | pop [dhcp.dns] |
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466 | DEBUGF 1,"DNS: %u.%u.%u.%u\n",[edx]:1,[edx+1]:1,[edx+2]:1,[edx+3]:1 |
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467 | jmp .next_option |
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468 | |||
469 | .done: |
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470 | ret |
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471 | |||
472 | |||
473 | |||
474 | dhcp_error: |
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475 | call dhcp_end |
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476 | |||
477 | link_local: |
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478 | call random |
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479 | mov cx, ax |
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480 | shl ecx, 16 |
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481 | mov cx, 0xfea9 ; IP 169.254.0.0 link local net, see RFC3927 |
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482 | mcall 76, API_IPv4 + 3, ecx ; mask is 255.255.0.0 |
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483 | DEBUGF 1,"Link Local IP assinged: 169.254.%u.%u\n", [generator+0]:1, [generator+1]:1 |
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484 | mcall 76, API_IPv4 + 7, 0xffff |
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485 | mcall 76, API_IPv4 + 9, 0x0 |
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486 | mcall 76, API_IPv4 + 5, 0x0 |
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487 | |||
488 | mcall 5, PROBE_WAIT*100 |
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489 | |||
490 | xor esi, esi |
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491 | probe_loop: |
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492 | call random ; create a pseudo random number in eax (seeded by MAC) |
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493 | |||
494 | cmp al, PROBE_MIN*100 ; check if al is bigger then PROBE_MIN |
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495 | jae @f ; all ok |
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496 | add al, (PROBE_MAX-PROBE_MIN)*100 ; al is too small |
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497 | @@: |
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498 | |||
499 | cmp al, PROBE_MAX*100 |
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500 | jbe @f |
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501 | sub al, (PROBE_MAX-PROBE_MIN)*100 |
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502 | @@: |
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503 | |||
504 | movzx ebx,al |
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505 | DEBUGF 1,"Waiting %u0ms\n",ebx |
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506 | mcall 5 |
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507 | |||
508 | DEBUGF 1,"Sending Probe\n" |
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509 | mcall 76, API_ARP + 6 |
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510 | inc esi |
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511 | |||
512 | cmp esi, PROBE_NUM |
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513 | jb probe_loop |
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514 | |||
515 | ; now we wait further ANNOUNCE_WAIT seconds and send ANNOUNCE_NUM ARP announces. If any other host has assingned |
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516 | ; IP within this time, we should create another adress, that have to be done later |
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517 | |||
518 | DEBUGF 1,"Waiting %us\n", ANNOUNCE_WAIT |
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519 | mcall 5, ANNOUNCE_WAIT*100 |
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520 | xor esi, esi |
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521 | announce_loop: |
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522 | |||
523 | DEBUGF 1,"Sending Announce\n" |
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524 | mcall 76, API_ARP + 6 |
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525 | |||
526 | inc esi |
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527 | cmp esi,ANNOUNCE_NUM |
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528 | je @f |
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529 | |||
530 | DEBUGF 1,"Waiting %us\n", ANNOUNCE_INTERVAL |
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531 | mcall 5, ANNOUNCE_INTERVAL*100 |
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532 | jmp announce_loop |
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533 | @@: |
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534 | |||
535 | |||
536 | error: |
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537 | DEBUGF 1,"Socket error\n" |
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538 | exit: ; we should, instead of closing, detect ARP conflicts and detect if cable keeps connected ;) |
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539 | mcall -1 |
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540 | |||
541 | |||
542 | random: ; Pseudo random actually |
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543 | |||
544 | mov eax, [generator] |
||
545 | add eax, -43ab45b5h |
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546 | ror eax, 1 |
||
547 | bswap eax |
||
548 | xor eax, dword[MAC] |
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549 | ror eax, 1 |
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550 | xor eax, dword[MAC+2] |
||
551 | mov [generator], eax |
||
552 | |||
553 | ret |
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554 | |||
555 | ; DATA AREA |
||
556 | |||
557 | align 16 |
||
558 | @IMPORT: |
||
559 | |||
560 | library \ |
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561 | libini,'libini.obj' |
||
562 | |||
563 | import libini, \ |
||
564 | ini.get_str,'ini_get_str' |
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565 | |||
566 | include_debug_strings |
||
567 | |||
568 | str_ip db 'ip', 0 |
||
569 | str_subnet db 'subnet', 0 |
||
570 | str_gateway db 'gateway', 0 |
||
571 | str_dns db 'dns', 0 |
||
572 | str_ipconfig db 'ipconfig', 0 |
||
573 | str_type db 'type', 0 |
||
574 | |||
575 | |||
576 | sockaddr1: |
||
577 | |||
578 | dw AF_INET4 |
||
579 | dw 68 shl 8 ; local port |
||
580 | dd 0 ; local IP |
||
581 | |||
582 | rb 10 |
||
583 | |||
584 | |||
585 | sockaddr2: |
||
586 | |||
587 | dw AF_INET4 |
||
588 | dw 67 shl 8 ; destination port |
||
589 | dd -1 ; destination IP |
||
590 | |||
591 | rb 10 |
||
592 | |||
593 | path db '/sys/network.ini' |
||
594 | |||
595 | IM_END: |
||
596 | |||
597 | inibuf rb 16 |
||
598 | |||
599 | dhcpMsgType db ? |
||
600 | dhcpLease dd ? |
||
601 | dhcpServerIP dd ? |
||
602 | |||
603 | dhcp: |
||
604 | .ip dd ? |
||
605 | .subnet dd ? |
||
606 | .dns dd ? |
||
607 | .gateway dd ? |
||
608 | |||
609 | |||
610 | dhcpMsgLen dd ? |
||
611 | socketNum dd ? |
||
612 | |||
613 | MAC dp ? |
||
614 | |||
615 | currTime dd ? |
||
616 | generator dd ? |
||
617 | |||
618 | dhcpMsg dd ? |
||
619 | |||
620 | I_END: |