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3545 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2010. 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 | ;; ICMP.INC ;; |
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7 | ;; ;; |
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8 | ;; Part of the tcp/ip network stack for KolibriOS ;; |
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9 | ;; ;; |
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10 | ;; Based on the work of [Johnny_B] and [smb] ;; |
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11 | ;; ;; |
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12 | ;; Written by hidnplayr@kolibrios.org ;; |
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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 | $Revision: 2924 $ |
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20 | |||
21 | ; ICMP types & codes |
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22 | |||
23 | ICMP_ECHOREPLY = 0 ; echo reply message |
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24 | |||
25 | ICMP_UNREACH = 3 |
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26 | ICMP_UNREACH_NET = 0 ; bad net |
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27 | ICMP_UNREACH_HOST = 1 ; bad host |
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28 | ICMP_UNREACH_PROTOCOL = 2 ; bad protocol |
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29 | ICMP_UNREACH_PORT = 3 ; bad port |
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30 | ICMP_UNREACH_NEEDFRAG = 4 ; IP_DF caused drop |
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31 | ICMP_UNREACH_SRCFAIL = 5 ; src route failed |
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32 | ICMP_UNREACH_NET_UNKNOWN = 6 ; unknown net |
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33 | ICMP_UNREACH_HOST_UNKNOWN = 7 ; unknown host |
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34 | ICMP_UNREACH_ISOLATED = 8 ; src host isolated |
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35 | ICMP_UNREACH_NET_PROHIB = 9 ; prohibited access |
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36 | ICMP_UNREACH_HOST_PROHIB = 10 ; ditto |
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37 | ICMP_UNREACH_TOSNET = 11 ; bad tos for net |
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38 | ICMP_UNREACH_TOSHOST = 12 ; bad tos for host |
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39 | ICMP_UNREACH_FILTER_PROHIB = 13 ; admin prohib |
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3556 | hidnplayr | 40 | ICMP_UNREACH_HOST_PRECEDENCE = 14 ; host prec vio. |
41 | ICMP_UNREACH_PRECEDENCE_CUTOFF = 15 ; prec cutoff |
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3545 | hidnplayr | 42 | |
43 | ICMP_SOURCEQUENCH = 4 ; Packet lost, slow down |
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44 | |||
45 | ICMP_REDIRECT = 5 ; shorter route, codes: |
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46 | ICMP_REDIRECT_NET = 0 ; for network |
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47 | ICMP_REDIRECT_HOST = 1 ; for host |
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48 | ICMP_REDIRECT_TOSNET = 2 ; for tos and net |
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49 | ICMP_REDIRECT_TOSHOST = 3 ; for tos and host |
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50 | |||
51 | ICMP_ALTHOSTADDR = 6 ; alternate host address |
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52 | ICMP_ECHO = 8 ; echo service |
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53 | ICMP_ROUTERADVERT = 9 ; router advertisement |
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54 | ICMP_ROUTERADVERT_NORMAL = 0 ; normal advertisement |
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55 | ICMP_ROUTERADVERT_NOROUTE_COMMON= 16 ; selective routing |
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56 | |||
57 | ICMP_ROUTERSOLICIT = 10 ; router solicitation |
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58 | ICMP_TIMXCEED = 11 ; time exceeded, code: |
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59 | ICMP_TIMXCEED_INTRANS = 0 ; ttl==0 in transit |
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60 | ICMP_TIMXCEED_REASS = 1 ; ttl==0 in reass |
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61 | |||
62 | ICMP_PARAMPROB = 12 ; ip header bad |
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63 | ICMP_PARAMPROB_ERRATPTR = 0 ; error at param ptr |
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64 | ICMP_PARAMPROB_OPTABSENT = 1 ; req. opt. absent |
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65 | ICMP_PARAMPROB_LENGTH = 2 ; bad length |
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66 | |||
67 | ICMP_TSTAMP = 13 ; timestamp request |
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68 | ICMP_TSTAMPREPLY = 14 ; timestamp reply |
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69 | ICMP_IREQ = 15 ; information request |
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70 | ICMP_IREQREPLY = 16 ; information reply |
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71 | ICMP_MASKREQ = 17 ; address mask request |
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72 | ICMP_MASKREPLY = 18 ; address mask reply |
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73 | ICMP_TRACEROUTE = 30 ; traceroute |
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74 | ICMP_DATACONVERR = 31 ; data conversion error |
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75 | ICMP_MOBILE_REDIRECT = 32 ; mobile host redirect |
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76 | ICMP_IPV6_WHEREAREYOU = 33 ; IPv6 where-are-you |
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77 | ICMP_IPV6_IAMHERE = 34 ; IPv6 i-am-here |
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78 | ICMP_MOBILE_REGREQUEST = 35 ; mobile registration req |
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79 | ICMP_MOBILE_REGREPLY = 36 ; mobile registreation reply |
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80 | ICMP_SKIP = 39 ; SKIP |
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81 | |||
82 | ICMP_PHOTURIS = 40 ; Photuris |
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83 | ICMP_PHOTURIS_UNKNOWN_INDEX = 1 ; unknown sec index |
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84 | ICMP_PHOTURIS_AUTH_FAILED = 2 ; auth failed |
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85 | ICMP_PHOTURIS_DECRYPT_FAILED = 3 ; decrypt failed |
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86 | |||
87 | |||
88 | |||
89 | struct ICMP_header |
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90 | |||
91 | Type db ? |
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92 | Code db ? |
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93 | Checksum dw ? |
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94 | Identifier dw ? |
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95 | SequenceNumber dw ? |
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96 | |||
97 | ends |
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98 | |||
99 | |||
100 | align 4 |
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101 | uglobal |
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3600 | hidnplayr | 102 | ICMP_PACKETS_TX rd NET_DEVICES_MAX |
103 | ICMP_PACKETS_RX rd NET_DEVICES_MAX |
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3545 | hidnplayr | 104 | endg |
105 | |||
106 | |||
107 | |||
108 | ;----------------------------------------------------------------- |
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109 | ; |
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110 | ; ICMP_init |
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111 | ; |
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112 | ;----------------------------------------------------------------- |
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113 | |||
114 | macro ICMP_init { |
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115 | |||
116 | xor eax, eax |
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117 | mov edi, ICMP_PACKETS_TX |
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3600 | hidnplayr | 118 | mov ecx, 2*NET_DEVICES_MAX |
3545 | hidnplayr | 119 | rep stosd |
120 | |||
121 | } |
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122 | |||
123 | |||
124 | ;----------------------------------------------------------------- |
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125 | ; |
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126 | ; ICMP_input: |
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127 | ; |
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128 | ; This procedure will send reply's to ICMP echo's |
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129 | ; and insert packets into sockets when needed |
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130 | ; |
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131 | ; IN: Pointer to buffer in [esp] |
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132 | ; size of buffer in [esp+4] |
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133 | ; ebx = pointer to device struct |
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134 | ; ecx = ICMP Packet size |
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135 | ; esi = ptr to ICMP Packet data |
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136 | ; edi = ptr to ipv4 source and dest address |
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137 | ; |
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138 | ; OUT: / |
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139 | ; |
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140 | ;----------------------------------------------------------------- |
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141 | align 4 |
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142 | ICMP_input: |
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143 | |||
3556 | hidnplayr | 144 | DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP_input:\n" |
3545 | hidnplayr | 145 | |
146 | ; First, check the checksum (altough some implementations ignore it) |
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147 | |||
148 | push esi ecx |
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149 | push [esi + ICMP_header.Checksum] |
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150 | mov [esi + ICMP_header.Checksum], 0 |
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151 | xor edx, edx |
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152 | call checksum_1 |
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153 | call checksum_2 |
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154 | pop si |
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155 | cmp dx, si |
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156 | pop ecx edx |
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157 | jne .checksum_mismatch |
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158 | |||
159 | cmp [edx + ICMP_header.Type], ICMP_ECHO ; Is this an echo request? |
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160 | jne .check_sockets |
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161 | |||
162 | ; We well re-use the packet so we can create the response as fast as possible |
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163 | ; Notice: this only works on pure ethernet |
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164 | |||
3556 | hidnplayr | 165 | DEBUGF DEBUG_NETWORK_VERBOSE, "got echo request\n" |
3545 | hidnplayr | 166 | mov [edx + ICMP_header.Type], ICMP_ECHOREPLY ; Change Packet type to reply |
167 | |||
168 | mov esi, [esp] ; Start of buffer |
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169 | |||
170 | ; Update stats (and validate device ptr) |
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171 | call NET_ptr_to_num |
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3601 | hidnplayr | 172 | cmp edi, -1 |
3545 | hidnplayr | 173 | je .dump |
174 | inc [ICMP_PACKETS_RX + 4*edi] |
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175 | inc [ICMP_PACKETS_TX + 4*edi] |
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176 | |||
3601 | hidnplayr | 177 | cmp ebx, LOOPBACK_DEVICE |
178 | je .loopback |
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179 | |||
180 | ; FIXME: dont assume device is an ethernet device! |
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181 | |||
3545 | hidnplayr | 182 | ; exchange dest and source address in IP header |
183 | ; exchange dest and source MAC in ETH header |
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184 | push dword [esi + ETH_header.DstMAC] |
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185 | push dword [esi + ETH_header.SrcMAC] |
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186 | pop dword [esi + ETH_header.DstMAC] |
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187 | pop dword [esi + ETH_header.SrcMAC] |
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188 | push word [esi + ETH_header.DstMAC + 4] |
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189 | push word [esi + ETH_header.SrcMAC + 4] |
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190 | pop word [esi + ETH_header.DstMAC + 4] |
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191 | pop word [esi + ETH_header.SrcMAC + 4] |
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3601 | hidnplayr | 192 | add esi, sizeof.ETH_header-4 |
3545 | hidnplayr | 193 | |
194 | .loopback: |
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3601 | hidnplayr | 195 | add esi, 4 |
3545 | hidnplayr | 196 | push [esi + IPv4_header.SourceAddress] |
197 | push [esi + IPv4_header.DestinationAddress] |
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198 | pop [esi + IPv4_header.SourceAddress] |
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199 | pop [esi + IPv4_header.DestinationAddress] |
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200 | |||
201 | ; Recalculate ip header checksum |
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202 | movzx ecx, [esi + IPv4_header.VersionAndIHL] ; Calculate IP Header length by using IHL field |
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203 | and ecx, 0x0f |
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204 | shl cx, 2 |
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205 | mov edi, ecx ; IP header length |
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206 | mov eax, edx ; ICMP packet start addr |
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207 | |||
208 | push esi ; Calculate the IP checksum |
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209 | xor edx, edx ; |
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210 | call checksum_1 ; |
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211 | call checksum_2 ; |
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212 | pop esi ; |
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213 | mov [esi + IPv4_header.HeaderChecksum], dx ; |
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214 | |||
215 | ; Recalculate ICMP CheckSum |
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216 | movzx ecx, [esi + IPv4_header.TotalLength] ; Find length of IP Packet |
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217 | xchg ch, cl ; |
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218 | sub ecx, edi ; IP packet length - IP header length = ICMP packet length |
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219 | |||
220 | mov esi, eax ; Calculate ICMP checksum |
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221 | xor edx, edx ; |
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222 | call checksum_1 ; |
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223 | call checksum_2 ; |
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224 | mov [eax + ICMP_header.Checksum], dx ; |
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225 | |||
226 | ; Transmit the packet (notice that packet ptr and packet size have been on stack since start of the procedure!) |
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227 | call [ebx + NET_DEVICE.transmit] |
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228 | ret |
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229 | |||
230 | |||
231 | |||
232 | |||
233 | .check_sockets: |
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234 | ; Look for an open ICMP socket |
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235 | |||
236 | mov esi, [edi] ; ipv4 source address |
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237 | mov eax, net_sockets |
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238 | .try_more: |
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239 | ; mov , [edx + ICMP_header.Identifier] |
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240 | .next_socket: |
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241 | mov eax, [eax + SOCKET.NextPtr] |
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242 | or eax, eax |
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243 | jz .dump |
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244 | |||
245 | cmp [eax + SOCKET.Domain], AF_INET4 |
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246 | jne .next_socket |
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247 | |||
248 | cmp [eax + SOCKET.Protocol], IP_PROTO_ICMP |
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249 | jne .next_socket |
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250 | |||
251 | cmp [eax + IP_SOCKET.RemoteIP], esi |
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252 | jne .next_socket |
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253 | |||
254 | ; cmp [eax + ICMP_SOCKET.Identifier], |
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255 | ; jne .next_socket |
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256 | |||
257 | ; call IPv4_dest_to_dev |
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258 | ; cmp edi,-1 |
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259 | ; je .dump |
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260 | ; inc [ICMP_PACKETS_RX+edi] |
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261 | |||
3556 | hidnplayr | 262 | DEBUGF DEBUG_NETWORK_VERBOSE, "socket=%x\n", eax |
3545 | hidnplayr | 263 | |
264 | pusha |
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265 | lea ecx, [eax + SOCKET.mutex] |
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266 | call mutex_lock |
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267 | popa |
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268 | |||
269 | mov esi, edx |
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270 | jmp SOCKET_input |
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271 | |||
272 | |||
273 | .checksum_mismatch: |
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3556 | hidnplayr | 274 | DEBUGF DEBUG_NETWORK_VERBOSE, "checksum mismatch\n" |
3545 | hidnplayr | 275 | |
276 | .dump: |
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3556 | hidnplayr | 277 | DEBUGF DEBUG_NETWORK_VERBOSE, "ICMP_input: dumping\n" |
3545 | hidnplayr | 278 | |
279 | call kernel_free |
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280 | add esp, 4 ; pop (balance stack) |
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281 | |||
282 | ret |
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283 | |||
284 | |||
285 | ;----------------------------------------------------------------- |
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286 | ; |
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287 | ; ICMP_output |
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288 | ; |
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289 | ; IN: eax = dest ip |
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290 | ; ebx = source ip |
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291 | ; ecx = data length |
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292 | ; dh = type |
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293 | ; dl = code |
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294 | ; esi = data offset |
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295 | ; edi = identifier shl 16 + sequence number |
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296 | ; |
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297 | ;----------------------------------------------------------------- |
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298 | align 4 |
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299 | ICMP_output: |
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300 | |||
3556 | hidnplayr | 301 | DEBUGF DEBUG_NETWORK_VERBOSE, "Creating ICMP Packet\n" |
3545 | hidnplayr | 302 | |
303 | push esi edi dx |
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304 | |||
305 | mov edx, [eax + IP_SOCKET.LocalIP] |
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306 | mov eax, [eax + IP_SOCKET.RemoteIP] |
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307 | add ecx, sizeof.ICMP_header |
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308 | mov di, IP_PROTO_ICMP SHL 8 + 128 ; TTL |
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309 | call IPv4_output |
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310 | jz .exit |
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311 | |||
3556 | hidnplayr | 312 | DEBUGF DEBUG_NETWORK_VERBOSE, "full icmp packet size: %u\n", edx |
3545 | hidnplayr | 313 | |
314 | pop word [edi + ICMP_header.Type] ; Write both type and code bytes at once |
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315 | pop dword [edi + ICMP_header.Identifier] ; identifier and sequence number |
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316 | mov [edi + ICMP_header.Checksum], 0 |
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317 | |||
318 | push ebx ecx edx |
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319 | mov esi, edi |
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320 | xor edx, edx |
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321 | call checksum_1 |
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322 | call checksum_2 |
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323 | mov [edi + ICMP_header.Checksum], dx |
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324 | pop edx ecx ebx esi |
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325 | |||
326 | sub ecx, sizeof.ICMP_header |
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327 | add edi, sizeof.ICMP_header |
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328 | push cx |
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329 | shr cx, 2 |
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330 | rep movsd |
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331 | pop cx |
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332 | and cx, 3 |
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333 | rep movsb |
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334 | |||
335 | sub edi, edx ;;; TODO: find a better way to remember start of packet |
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336 | push edx edi |
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3556 | hidnplayr | 337 | DEBUGF DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n" |
3545 | hidnplayr | 338 | call [ebx + NET_DEVICE.transmit] |
339 | ret |
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340 | .exit: |
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3556 | hidnplayr | 341 | DEBUGF DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n" |
3545 | hidnplayr | 342 | add esp, 2*4 + 2 |
343 | ret |
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344 | |||
345 | |||
346 | |||
347 | |||
348 | ;----------------------------------------------------------------- |
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349 | ; |
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350 | ; ICMP_output |
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351 | ; |
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352 | ; IN: eax = socket ptr |
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353 | ; ecx = data length |
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354 | ; esi = data offset |
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355 | ; |
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356 | ;----------------------------------------------------------------- |
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357 | align 4 |
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358 | ICMP_output_raw: |
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359 | |||
3556 | hidnplayr | 360 | DEBUGF DEBUG_NETWORK_VERBOSE, "Creating ICMP Packet for socket %x, data ptr=%x\n", eax, edx |
3545 | hidnplayr | 361 | |
362 | push edx |
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363 | |||
364 | mov di, IP_PROTO_ICMP SHL 8 + 128 ; TTL |
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365 | mov edx, [eax + IP_SOCKET.LocalIP] |
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366 | mov eax, [eax + IP_SOCKET.RemoteIP] |
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367 | call IPv4_output |
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368 | jz .exit |
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369 | |||
370 | pop esi |
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371 | push edx |
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372 | push eax |
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373 | |||
374 | push edi ecx |
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3556 | hidnplayr | 375 | DEBUGF DEBUG_NETWORK_VERBOSE, "copying %u bytes from %x to %x\n", ecx, esi, edi |
3545 | hidnplayr | 376 | rep movsb |
377 | pop ecx edi |
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378 | |||
379 | mov [edi + ICMP_header.Checksum], 0 |
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380 | |||
381 | mov esi, edi |
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382 | xor edx, edx |
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383 | call checksum_1 |
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384 | call checksum_2 |
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385 | mov [edi + ICMP_header.Checksum], dx |
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386 | |||
3556 | hidnplayr | 387 | DEBUGF DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n" |
3545 | hidnplayr | 388 | call [ebx + NET_DEVICE.transmit] |
389 | ret |
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390 | .exit: |
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3556 | hidnplayr | 391 | DEBUGF DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n" |
3545 | hidnplayr | 392 | add esp, 4 |
393 | ret |
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394 | |||
395 | |||
396 | |||
397 | |||
398 | ;----------------------------------------------------------------- |
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399 | ; |
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400 | ; ICMP_API |
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401 | ; |
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402 | ; This function is called by system function 75 |
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403 | ; |
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404 | ; IN: subfunction number in bl |
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405 | ; device number in bh |
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406 | ; ecx, edx, .. depends on subfunction |
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407 | ; |
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408 | ; OUT: |
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409 | ; |
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410 | ;----------------------------------------------------------------- |
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411 | align 4 |
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412 | ICMP_api: |
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413 | |||
414 | movzx eax, bh |
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415 | shl eax, 2 |
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416 | |||
417 | test bl, bl |
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418 | jz .packets_tx ; 0 |
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419 | dec bl |
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420 | jz .packets_rx ; 1 |
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421 | |||
422 | .error: |
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423 | mov eax, -1 |
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424 | ret |
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425 | |||
426 | .packets_tx: |
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427 | mov eax, [ICMP_PACKETS_TX + eax] |
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428 | ret |
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429 | |||
430 | .packets_rx: |
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431 | mov eax, [ICMP_PACKETS_RX + eax] |
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432 | ret |