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1159 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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1514 | hidnplayr | 3 | ;; Copyright (C) KolibriOS team 2004-2010. All rights reserved. ;; |
1159 | hidnplayr | 4 | ;; Distributed under terms of the GNU General Public License ;; |
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 | |||
1206 | hidnplayr | 20 | $Revision: 1544 $ |
1159 | hidnplayr | 21 | |
22 | ; ICMP types & codes |
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23 | |||
1514 | hidnplayr | 24 | ICMP_ECHOREPLY equ 0 ; echo reply message |
1159 | hidnplayr | 25 | |
1514 | hidnplayr | 26 | ICMP_UNREACH equ 3 |
27 | ICMP_UNREACH_NET equ 0 ; bad net |
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28 | ICMP_UNREACH_HOST equ 1 ; bad host |
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29 | ICMP_UNREACH_PROTOCOL equ 2 ; bad protocol |
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30 | ICMP_UNREACH_PORT equ 3 ; bad port |
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31 | ICMP_UNREACH_NEEDFRAG equ 4 ; IP_DF caused drop |
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32 | ICMP_UNREACH_SRCFAIL equ 5 ; src route failed |
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33 | ICMP_UNREACH_NET_UNKNOWN equ 6 ; unknown net |
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34 | ICMP_UNREACH_HOST_UNKNOWN equ 7 ; unknown host |
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35 | ICMP_UNREACH_ISOLATED equ 8 ; src host isolated |
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36 | ICMP_UNREACH_NET_PROHIB equ 9 ; prohibited access |
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37 | ICMP_UNREACH_HOST_PROHIB equ 10 ; ditto |
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38 | ICMP_UNREACH_TOSNET equ 11 ; bad tos for net |
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39 | ICMP_UNREACH_TOSHOST equ 12 ; bad tos for host |
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40 | ICMP_UNREACH_FILTER_PROHIB equ 13 ; admin prohib |
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41 | ICMP_UNREACH_HOST_PRECEDENCE equ 14 ; host prec vio. |
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42 | ICMP_UNREACH_PRECEDENCE_CUTOFF equ 15 ; prec cutoff |
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1159 | hidnplayr | 43 | |
1514 | hidnplayr | 44 | ICMP_SOURCEQUENCH equ 4 ; Packet lost, slow down |
1159 | hidnplayr | 45 | |
1514 | hidnplayr | 46 | ICMP_REDIRECT equ 5 ; shorter route, codes: |
47 | ICMP_REDIRECT_NET equ 0 ; for network |
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48 | ICMP_REDIRECT_HOST equ 1 ; for host |
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49 | ICMP_REDIRECT_TOSNET equ 2 ; for tos and net |
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50 | ICMP_REDIRECT_TOSHOST equ 3 ; for tos and host |
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1159 | hidnplayr | 51 | |
1514 | hidnplayr | 52 | ICMP_ALTHOSTADDR equ 6 ; alternate host address |
53 | ICMP_ECHO equ 8 ; echo service |
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54 | ICMP_ROUTERADVERT equ 9 ; router advertisement |
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55 | ICMP_ROUTERADVERT_NORMAL equ 0 ; normal advertisement |
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56 | ICMP_ROUTERADVERT_NOROUTE_COMMON equ 16 ; selective routing |
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1159 | hidnplayr | 57 | |
1514 | hidnplayr | 58 | ICMP_ROUTERSOLICIT equ 10 ; router solicitation |
59 | ICMP_TIMXCEED equ 11 ; time exceeded, code: |
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60 | ICMP_TIMXCEED_INTRANS equ 0 ; ttl==0 in transit |
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61 | ICMP_TIMXCEED_REASS equ 1 ; ttl==0 in reass |
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1159 | hidnplayr | 62 | |
1514 | hidnplayr | 63 | ICMP_PARAMPROB equ 12 ; ip header bad |
64 | ICMP_PARAMPROB_ERRATPTR equ 0 ; error at param ptr |
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65 | ICMP_PARAMPROB_OPTABSENT equ 1 ; req. opt. absent |
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66 | ICMP_PARAMPROB_LENGTH equ 2 ; bad length |
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1159 | hidnplayr | 67 | |
1514 | hidnplayr | 68 | ICMP_TSTAMP equ 13 ; timestamp request |
69 | ICMP_TSTAMPREPLY equ 14 ; timestamp reply |
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70 | ICMP_IREQ equ 15 ; information request |
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71 | ICMP_IREQREPLY equ 16 ; information reply |
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72 | ICMP_MASKREQ equ 17 ; address mask request |
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73 | ICMP_MASKREPLY equ 18 ; address mask reply |
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74 | ICMP_TRACEROUTE equ 30 ; traceroute |
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75 | ICMP_DATACONVERR equ 31 ; data conversion error |
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76 | ICMP_MOBILE_REDIRECT equ 32 ; mobile host redirect |
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77 | ICMP_IPV6_WHEREAREYOU equ 33 ; IPv6 where-are-you |
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78 | ICMP_IPV6_IAMHERE equ 34 ; IPv6 i-am-here |
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79 | ICMP_MOBILE_REGREQUEST equ 35 ; mobile registration req |
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80 | ICMP_MOBILE_REGREPLY equ 36 ; mobile registreation reply |
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81 | ICMP_SKIP equ 39 ; SKIP |
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1159 | hidnplayr | 82 | |
1514 | hidnplayr | 83 | ICMP_PHOTURIS equ 40 ; Photuris |
84 | ICMP_PHOTURIS_UNKNOWN_INDEX equ 1 ; unknown sec index |
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85 | ICMP_PHOTURIS_AUTH_FAILED equ 2 ; auth failed |
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86 | ICMP_PHOTURIS_DECRYPT_FAILED equ 3 ; decrypt failed |
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1159 | hidnplayr | 87 | |
88 | |||
89 | |||
90 | struct ICMP_Packet |
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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 | .Data: |
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97 | ends |
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98 | |||
99 | |||
100 | align 4 |
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101 | uglobal |
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102 | ICMP_PACKETS_TX rd MAX_IP |
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103 | ICMP_PACKETS_RX rd MAX_IP |
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104 | endg |
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105 | |||
1185 | hidnplayr | 106 | |
107 | |||
1159 | hidnplayr | 108 | ;----------------------------------------------------------------- |
109 | ; |
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110 | ; ICMP_init |
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111 | ; |
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112 | ;----------------------------------------------------------------- |
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113 | |||
1529 | hidnplayr | 114 | macro ICMP_init { |
115 | |||
1159 | hidnplayr | 116 | xor eax, eax |
117 | mov edi, ICMP_PACKETS_TX |
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118 | mov ecx, 2*MAX_IP |
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119 | rep stosd |
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120 | |||
1529 | hidnplayr | 121 | } |
1171 | hidnplayr | 122 | |
123 | |||
1257 | hidnplayr | 124 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 125 | ; |
1514 | hidnplayr | 126 | ; ICMP_input: |
1159 | hidnplayr | 127 | ; |
1514 | hidnplayr | 128 | ; This procedure will send reply's to ICMP echo's |
129 | ; and insert packets into sockets when needed |
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1159 | hidnplayr | 130 | ; |
131 | ; IN: Pointer to buffer in [esp] |
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132 | ; size of buffer in [esp+4] |
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1541 | hidnplayr | 133 | ; ebx = pointer to device struct |
134 | ; ecx = ICMP Packet size |
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135 | ; edx = ptr to ICMP Packet data |
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136 | ; esi = ipv4 source address |
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137 | ; edi = ipv4 dest address |
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1159 | hidnplayr | 138 | ; OUT: / |
139 | ; |
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1257 | hidnplayr | 140 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 141 | align 4 |
1514 | hidnplayr | 142 | ICMP_input: |
1159 | hidnplayr | 143 | |
1544 | hidnplayr | 144 | DEBUGF 1,"ICMP_input - start\n" |
1514 | hidnplayr | 145 | |
1544 | hidnplayr | 146 | ; First, check the checksum (altough some implementations ignore it) |
147 | |||
148 | push edx esi ecx |
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149 | push [edx + ICMP_Packet.Checksum] |
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150 | mov [edx + ICMP_Packet.Checksum], 0 |
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151 | mov esi, edx |
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152 | xor edx, edx |
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153 | call checksum_1 |
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154 | call checksum_2 |
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155 | pop si |
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156 | cmp dx, si |
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157 | pop ecx esi edx |
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158 | jne .checksum_mismatch |
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159 | |||
1185 | hidnplayr | 160 | cmp byte [edx + ICMP_Packet.Type], ICMP_ECHO ; Is this an echo request? |
1159 | hidnplayr | 161 | jne .check_sockets |
162 | |||
1544 | hidnplayr | 163 | ; We well re-use the packet sow e can create the response as fast as possible |
164 | ; Notice: this only works on pure ethernet (however, IP packet options are not a problem this time :) |
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165 | |||
1541 | hidnplayr | 166 | DEBUGF 1,"ICMP_input - echo request\n" |
1159 | hidnplayr | 167 | mov byte [edx + ICMP_Packet.Type], ICMP_ECHOREPLY ; Change Packet type to reply |
168 | |||
1544 | hidnplayr | 169 | ; Update stats (and validate device ptr) |
1514 | hidnplayr | 170 | call NET_ptr_to_num |
1171 | hidnplayr | 171 | cmp edi,-1 |
172 | je .dump |
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173 | inc [ICMP_PACKETS_RX+4*edi] |
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1185 | hidnplayr | 174 | inc [ICMP_PACKETS_TX+4*edi] |
1171 | hidnplayr | 175 | |
1159 | hidnplayr | 176 | ; exchange dest and source address in IP header |
177 | ; exchange dest and source MAC in ETH header |
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1544 | hidnplayr | 178 | mov esi, [esp] ; Start of buffer |
179 | push dword [esi + ETH_FRAME.DstMAC] |
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180 | push dword [esi + ETH_FRAME.SrcMAC] |
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181 | pop dword [esi + ETH_FRAME.DstMAC] |
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182 | pop dword [esi + ETH_FRAME.SrcMAC] |
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183 | push word [esi + ETH_FRAME.DstMAC + 4] |
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184 | push word [esi + ETH_FRAME.SrcMAC + 4] |
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185 | pop word [esi + ETH_FRAME.DstMAC + 4] |
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186 | pop word [esi + ETH_FRAME.SrcMAC + 4] |
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1159 | hidnplayr | 187 | |
1544 | hidnplayr | 188 | add esi, ETH_FRAME.Data |
189 | push [esi + IPv4_Packet.SourceAddress] |
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190 | push [esi + IPv4_Packet.DestinationAddress] |
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191 | pop [esi + IPv4_Packet.SourceAddress] |
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192 | pop [esi + IPv4_Packet.DestinationAddress] |
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1159 | hidnplayr | 193 | |
194 | ; Recalculate ip header checksum |
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1249 | hidnplayr | 195 | movzx ecx, byte [esi + IPv4_Packet.VersionAndIHL] ; Calculate IP Header length by using IHL field |
1544 | hidnplayr | 196 | and ecx, 0x0f |
197 | shl cx, 2 |
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198 | mov edi, ecx ; IP header length |
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199 | mov eax, edx ; ICMP packet start addr |
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1159 | hidnplayr | 200 | |
1544 | hidnplayr | 201 | push esi ; Calculate the IP checksum |
202 | xor edx, edx ; |
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203 | call checksum_1 ; |
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204 | call checksum_2 ; |
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205 | pop esi ; |
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206 | mov word [esi + IPv4_Packet.HeaderChecksum], dx ; |
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207 | |||
1159 | hidnplayr | 208 | ; Recalculate ICMP CheckSum |
1544 | hidnplayr | 209 | movzx ecx, word[esi + IPv4_Packet.TotalLength] ; Find length of IP Packet |
210 | xchg ch, cl ; |
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211 | sub ecx, edi ; IP packet length - IP header length = ICMP packet length |
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1159 | hidnplayr | 212 | |
1544 | hidnplayr | 213 | mov esi, eax ; Calculate ICMP checksum |
214 | xor edx, edx ; |
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215 | call checksum_1 ; |
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216 | call checksum_2 ; |
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217 | mov word [eax + ICMP_Packet.Checksum], dx ; |
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218 | |||
219 | ; Transmit the packet (notice that packet ptr and packet size have been on stack since start of the procedure!) |
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1519 | hidnplayr | 220 | call [ebx + NET_DEVICE.transmit] |
221 | ret |
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1159 | hidnplayr | 222 | |
1171 | hidnplayr | 223 | |
224 | |||
225 | |||
1159 | hidnplayr | 226 | .check_sockets: |
227 | ; Look for an open ICMP socket |
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1541 | hidnplayr | 228 | ; esi = sender ip |
1159 | hidnplayr | 229 | |
1541 | hidnplayr | 230 | mov ebx, net_sockets |
1159 | hidnplayr | 231 | .try_more: |
1541 | hidnplayr | 232 | ; mov ax , [edx + ICMP_Packet.Identifier] |
1159 | hidnplayr | 233 | .next_socket: |
1541 | hidnplayr | 234 | mov ebx, [ebx + SOCKET.NextPtr] |
235 | or ebx, ebx |
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1159 | hidnplayr | 236 | jz .dump |
1541 | hidnplayr | 237 | |
238 | cmp [ebx + SOCKET.Domain], AF_INET4 |
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1159 | hidnplayr | 239 | jne .next_socket |
1541 | hidnplayr | 240 | |
241 | cmp [ebx + SOCKET.Protocol], IP_PROTO_ICMP |
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242 | jne .next_socket |
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1171 | hidnplayr | 243 | |
1541 | hidnplayr | 244 | cmp [ebx + IP_SOCKET.RemoteIP], esi |
245 | jne .next_socket |
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1159 | hidnplayr | 246 | |
1541 | hidnplayr | 247 | ; cmp [esi + ICMP_SOCKET.Identifier], ax |
248 | ; jne .next_socket |
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249 | |||
250 | ; call IPv4_dest_to_dev |
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251 | ; cmp edi,-1 |
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252 | ; je .dump |
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253 | ; inc [ICMP_PACKETS_RX+edi] |
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254 | |||
255 | DEBUGF 1,"Found valid ICMP packet for socket %x\n", ebx |
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256 | |||
257 | mov eax, ebx |
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258 | add ebx, SOCKET.lock |
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1159 | hidnplayr | 259 | call wait_mutex |
260 | |||
1541 | hidnplayr | 261 | mov esi, edx |
1519 | hidnplayr | 262 | jmp SOCKET_input |
1159 | hidnplayr | 263 | |
1541 | hidnplayr | 264 | |
1544 | hidnplayr | 265 | .checksum_mismatch: |
266 | DEBUGF 1,"ICMP_Handler - checksum mismatch\n" |
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267 | |||
268 | .dump: |
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1159 | hidnplayr | 269 | DEBUGF 1,"ICMP_Handler - dumping\n" |
270 | |||
271 | call kernel_free |
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1249 | hidnplayr | 272 | add esp, 4 ; pop (balance stack) |
1159 | hidnplayr | 273 | |
274 | ret |
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275 | |||
276 | |||
1257 | hidnplayr | 277 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 278 | ; |
1519 | hidnplayr | 279 | ; ICMP_output |
1159 | hidnplayr | 280 | ; |
1519 | hidnplayr | 281 | ; IN: eax = dest ip |
282 | ; ebx = source ip |
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283 | ; ecx = data length |
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284 | ; dh = type |
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285 | ; dl = code |
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286 | ; high 16 bits of edx = fragment id (for IP header) |
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287 | ; esi = data offset |
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288 | ; edi = identifier shl 16 + sequence number |
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1159 | hidnplayr | 289 | ; |
290 | ;----------------------------------------------------------------- |
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291 | align 4 |
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1514 | hidnplayr | 292 | ICMP_output: |
1159 | hidnplayr | 293 | |
1519 | hidnplayr | 294 | DEBUGF 1,"Creating ICMP Packet\n" |
1159 | hidnplayr | 295 | |
296 | push esi edi edx |
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297 | |||
1541 | hidnplayr | 298 | mov ebx, [eax + IP_SOCKET.LocalIP] |
299 | mov eax, [eax + IP_SOCKET.RemoteIP] |
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1159 | hidnplayr | 300 | add ecx, ICMP_Packet.Data |
1529 | hidnplayr | 301 | mov di , IP_PROTO_ICMP SHL 8 + 128 ; TTL |
1159 | hidnplayr | 302 | shr edx, 16 |
303 | |||
1529 | hidnplayr | 304 | call IPv4_output |
1514 | hidnplayr | 305 | jz .exit |
1159 | hidnplayr | 306 | |
1519 | hidnplayr | 307 | DEBUGF 1,"full icmp packet size: %u\n", edx |
1165 | hidnplayr | 308 | |
1159 | hidnplayr | 309 | pop eax |
310 | mov word [edi + ICMP_Packet.Type], ax ; Write both type and code bytes at once |
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311 | pop eax |
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312 | mov [edi + ICMP_Packet.SequenceNumber], ax |
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313 | shr eax, 16 |
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314 | mov [edi + ICMP_Packet.Identifier], ax |
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315 | mov [edi + ICMP_Packet.Checksum], 0 |
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316 | |||
1249 | hidnplayr | 317 | push eax ebx ecx edx |
318 | mov esi, edi |
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319 | xor edx, edx |
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320 | call checksum_1 |
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321 | call checksum_2 |
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322 | mov [edi + ICMP_Packet.Checksum], dx |
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323 | pop edx ecx ebx eax esi |
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1159 | hidnplayr | 324 | |
325 | sub ecx, ICMP_Packet.Data |
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326 | add edi, ICMP_Packet.Data |
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327 | push cx |
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328 | shr cx , 2 |
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329 | rep movsd |
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330 | pop cx |
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331 | and cx , 3 |
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332 | rep movsb |
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333 | |||
1514 | hidnplayr | 334 | sub edi, edx ;;; TODO: find a better way to remember start of packet |
1519 | hidnplayr | 335 | push edx edi |
336 | DEBUGF 1,"Sending ICMP Packet\n" |
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337 | call [ebx + NET_DEVICE.transmit] |
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338 | ret |
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1159 | hidnplayr | 339 | .exit: |
1519 | hidnplayr | 340 | DEBUGF 1,"Creating ICMP Packet failed\n" |
1165 | hidnplayr | 341 | add esp, 3*4 |
1159 | hidnplayr | 342 | ret |
343 | |||
344 | |||
345 | |||
346 | |||
1257 | hidnplayr | 347 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 348 | ; |
1541 | hidnplayr | 349 | ; ICMP_output |
350 | ; |
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351 | ; IN: eax = socket ptr |
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352 | ; ecx = data length |
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353 | ; esi = data offset |
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354 | ; |
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355 | ;----------------------------------------------------------------- |
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356 | align 4 |
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357 | ICMP_output_raw: |
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358 | |||
359 | DEBUGF 1,"Creating ICMP Packet for socket %x, data ptr=%x\n", eax, edx |
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360 | |||
361 | push edx |
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362 | |||
363 | mov di, IP_PROTO_ICMP SHL 8 + 128 ; TTL |
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364 | shr edx, 16 |
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365 | mov ebx, [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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375 | DEBUGF 1,"copying %u bytes from %x to %x\n", ecx, esi, edi |
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376 | rep movsb |
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377 | pop ecx edi |
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378 | |||
379 | mov [edi + ICMP_Packet.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_Packet.Checksum], dx |
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386 | |||
387 | DEBUGF 1,"Sending ICMP Packet\n" |
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388 | call [ebx + NET_DEVICE.transmit] |
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389 | ret |
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390 | .exit: |
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391 | DEBUGF 1,"Creating ICMP Packet failed\n" |
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392 | add esp, 4 |
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393 | ret |
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394 | |||
395 | |||
396 | |||
397 | |||
398 | ;----------------------------------------------------------------- |
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399 | ; |
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1159 | hidnplayr | 400 | ; ICMP_API |
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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1257 | hidnplayr | 410 | ;----------------------------------------------------------------- |
1159 | hidnplayr | 411 | align 4 |
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 | add eax, ICMP_PACKETS_TX |
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428 | mov eax, [eax] |
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429 | ret |
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430 | |||
431 | .packets_rx: |
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432 | add eax, ICMP_PACKETS_RX |
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433 | mov eax, [eax] |
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434 | ret |