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1159 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2008. 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 | |||
20 | $Revision: 593 $ |
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21 | |||
22 | ; ICMP types & codes |
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23 | |||
24 | ICMP_ECHOREPLY equ 0 ; echo reply message |
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25 | |||
26 | ICMP_UNREACH equ 3 |
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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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43 | |||
44 | ICMP_SOURCEQUENCH equ 4 ; Packet lost, slow down |
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45 | |||
46 | ICMP_REDIRECT equ 5 ; shorter route, codes: |
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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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51 | |||
52 | ICMP_ALTHOSTADDR equ 6 ; alternate host address |
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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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57 | |||
58 | ICMP_ROUTERSOLICIT equ 10 ; router solicitation |
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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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62 | |||
63 | ICMP_PARAMPROB equ 12 ; ip header bad |
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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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67 | |||
68 | ICMP_TSTAMP equ 13 ; timestamp request |
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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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82 | |||
83 | ICMP_PHOTURIS equ 40 ; Photuris |
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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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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 | |||
106 | ;----------------------------------------------------------------- |
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107 | ; |
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108 | ; ICMP_init |
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109 | ; |
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110 | ; This function resets all ICMP variables |
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111 | ; |
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112 | ; IN: / |
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113 | ; OUT: / |
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114 | ; |
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115 | ;----------------------------------------------------------------- |
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116 | |||
117 | align 4 |
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118 | ICMP_init: |
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119 | |||
120 | xor eax, eax |
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121 | mov edi, ICMP_PACKETS_TX |
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122 | mov ecx, 2*MAX_IP |
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123 | rep stosd |
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124 | |||
125 | ret |
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126 | |||
127 | |||
1171 | hidnplayr | 128 | |
129 | |||
130 | |||
131 | |||
132 | |||
133 | |||
134 | |||
135 | |||
1159 | hidnplayr | 136 | ;-------------------------------- |
137 | ; |
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138 | ; ICMP_Handler: |
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139 | ; |
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140 | ; Called by IP_handler, |
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141 | ; this procedure will send reply's to ICMP echo's etc ;;; TODO: update this to work with fragmented packets too! |
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142 | ; |
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143 | ; IN: Pointer to buffer in [esp] |
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144 | ; size of buffer in [esp+4] |
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145 | ; pointer to device struct in ebx |
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146 | ; ICMP Packet size in ecx |
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147 | ; pointer to ICMP Packet data in edx |
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148 | ; OUT: / |
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149 | ; |
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150 | ;-------------------------------- |
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151 | |||
152 | align 4 |
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153 | ICMP_Handler: ;TODO: works only on pure ethernet right now ! |
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154 | |||
155 | DEBUGF 1,"ICMP_Handler - start\n" |
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156 | cmp byte [edx + ICMP_Packet.Type], ICMP_ECHO ; Is this an echo request? discard if not |
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157 | jne .check_sockets |
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158 | |||
159 | mov byte [edx + ICMP_Packet.Type], ICMP_ECHOREPLY ; Change Packet type to reply |
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160 | mov word [edx + ICMP_Packet.Checksum], 0 ; Set checksum to 0, needed to calculate new checksum |
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161 | |||
1171 | hidnplayr | 162 | call ETH_struc2dev |
163 | cmp edi,-1 |
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164 | je .dump |
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165 | inc [ICMP_PACKETS_RX+4*edi] |
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166 | |||
1159 | hidnplayr | 167 | ; exchange dest and source address in IP header |
168 | ; exchange dest and source MAC in ETH header |
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169 | mov esi, [esp] |
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170 | |||
171 | mov eax, dword [esi + ETH_FRAME.DstMAC] |
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172 | mov ecx, dword [esi + ETH_FRAME.SrcMAC] |
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173 | mov dword [esi + ETH_FRAME.SrcMAC], eax |
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174 | mov dword [esi + ETH_FRAME.DstMAC], ecx |
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175 | |||
176 | mov ax, word [esi + ETH_FRAME.DstMAC + 4] |
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177 | mov cx, word [esi + ETH_FRAME.SrcMAC + 4] |
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178 | mov word [esi + ETH_FRAME.SrcMAC + 4], ax |
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179 | mov word [esi + ETH_FRAME.DstMAC + 4], cx |
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180 | |||
181 | mov eax, dword [esi + ETH_FRAME.Data + IPv4_Packet.SourceAddress] |
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182 | mov ecx, dword [esi + ETH_FRAME.Data + IPv4_Packet.DestinationAddress] |
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183 | mov dword [esi + ETH_FRAME.Data + IPv4_Packet.DestinationAddress], eax |
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184 | mov dword [esi + ETH_FRAME.Data + IPv4_Packet.SourceAddress], ecx |
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185 | |||
186 | ; Recalculate ip header checksum |
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187 | ; mov esi, [esp] |
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188 | add esi, ETH_FRAME.Data ; Point esi to start of IP Packet |
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189 | movzx eax, byte [esi + IPv4_Packet.VersionAndIHL] ; Calculate IP Header length by using IHL field |
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190 | and eax, 0x0000000F ; |
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191 | shl eax, 2 ; |
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192 | push ebx edx esi |
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193 | stdcall checksum_jb, esi, eax ; calculate the checksum |
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194 | pop esi edx ebx |
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195 | xchg al, ah ; convert to intel byte order |
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196 | ; mov esi, [esp] |
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197 | mov word [esi + IPv4_Packet.HeaderChecksum], ax ; Store it in the IP Packet header |
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198 | |||
199 | ; Recalculate ICMP CheckSum |
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200 | ; mov esi, [esp] ; Find length of IP Packet |
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201 | movzx eax, word[esi + IPv4_Packet.TotalLength] ; |
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202 | xchg ah , al ; |
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203 | movzx edi, byte [esi + IPv4_Packet.VersionAndIHL] ; Calculate IP Header length by using IHL field |
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204 | and edi, 0x0000000F ; |
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205 | shl edi, 2 ; |
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206 | sub ax , di ; Now we know the length of ICMP data in eax |
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207 | push ebx edx |
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208 | stdcall checksum_jb,edx,eax ; Calculate the checksum of icmp data |
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209 | pop edx ebx |
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210 | xchg al, ah ; Convert to intel byte order |
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211 | mov word [edx + ICMP_Packet.Checksum], ax |
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212 | |||
1171 | hidnplayr | 213 | jmp ETH_Sender ; Send the reply |
1159 | hidnplayr | 214 | |
1171 | hidnplayr | 215 | |
216 | |||
217 | |||
218 | |||
1159 | hidnplayr | 219 | .check_sockets: |
220 | ; TODO: validate the header & checksum. Discard buffer if error |
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221 | |||
222 | ; Look for an open ICMP socket |
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223 | |||
224 | mov esi, net_sockets |
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225 | .try_more: |
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226 | mov ax , [edx + ICMP_Packet.Identifier] |
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227 | .next_socket: |
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228 | mov esi, [esi + SOCKET.NextPtr] |
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229 | or esi, esi |
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230 | jz .dump |
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231 | cmp [esi + SOCKET.Type], IP_PROTO_ICMP |
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232 | jne .next_socket |
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233 | cmp [esi + SOCKET.LocalPort], ax |
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234 | jne .next_socket |
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235 | |||
236 | cmp [esi + SOCKET.rxDataCount],0 ; get # of bytes already in buffer |
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237 | jnz .dump ; only one packet at a time may be in the buffer! |
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238 | |||
239 | cmp ecx, SOCKETBUFFSIZE - SOCKETHEADERSIZE; TODO: fix this problem ! |
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240 | jg .dump |
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241 | |||
1171 | hidnplayr | 242 | call IPv4_dest_to_dev |
243 | cmp edi,-1 |
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244 | je .dump |
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245 | inc [ICMP_PACKETS_RX+4*edi] |
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246 | |||
1159 | hidnplayr | 247 | DEBUGF 1,"Found valid ICMP packet for socket %x\n", esi |
248 | |||
249 | lea ebx, [esi + SOCKET.lock] |
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250 | call wait_mutex |
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251 | |||
252 | ; Now, copy data to socket. We have socket address in esi. |
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253 | ; We have ICMP Packet in edx |
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254 | ; number of bytes in ecx |
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255 | |||
256 | ; note: we do not strip the header! |
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257 | |||
258 | DEBUGF 1,"bytes: %u\n", ecx |
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259 | |||
260 | mov [esi + SOCKET.rxDataCount], ecx |
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261 | |||
262 | lea edi, [esi + SOCKETHEADERSIZE] |
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263 | push esi |
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264 | push ecx |
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265 | mov esi, edx |
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266 | shr ecx, 2 |
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267 | rep movsd ; copy the data across |
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268 | pop ecx |
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269 | and ecx, 3 |
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270 | rep movsb |
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271 | pop esi |
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272 | |||
273 | DEBUGF 1,"ICMP socket updated\n" |
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274 | |||
275 | mov [esi + SOCKET.lock], 0 |
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276 | |||
277 | ; flag an event to the application |
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278 | mov eax, [esi + SOCKET.PID] ; get socket owner PID |
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279 | mov ecx, 1 |
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280 | mov esi, TASK_DATA + TASKDATA.pid |
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281 | |||
282 | .next_pid: |
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283 | cmp [esi], eax |
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284 | je .found_pid |
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285 | inc ecx |
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286 | add esi, 0x20 |
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287 | cmp ecx, [TASK_COUNT] |
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288 | jbe .next_pid |
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289 | |||
290 | jmp .dump |
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291 | |||
292 | .found_pid: |
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293 | shl ecx, 8 |
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294 | or [ecx + SLOT_BASE + APPDATA.event_mask], EVENT_NETWORK ; stack event |
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295 | |||
296 | mov [check_idle_semaphore], 200 |
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297 | |||
298 | .dump: |
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299 | DEBUGF 1,"ICMP_Handler - dumping\n" |
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300 | |||
301 | call kernel_free |
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1165 | hidnplayr | 302 | add esp, 8 ; pop (balance stack) |
1159 | hidnplayr | 303 | |
304 | ret |
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305 | |||
306 | |||
307 | ;-------------------------------- |
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308 | ; |
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309 | ; ICMP_Handler_fragments: |
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310 | ; |
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311 | ; Called by IP_handler, |
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312 | ; this procedure will send reply's to ICMP echo's etc |
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313 | ; |
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314 | ; IN: Pointer to buffer in [esp] |
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315 | ; size of buffer in [esp+4] |
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316 | ; pointer to device struct in ebx |
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317 | ; ICMP Packet size in ecx |
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318 | ; pointer to ICMP Packet data in edx |
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319 | ; OUT: / |
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320 | ; |
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321 | ;-------------------------------- |
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322 | |||
323 | align 4 |
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324 | ICMP_Handler_fragments: ; works only on pure ethernet right now ! |
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325 | |||
326 | DEBUGF 1,"ICMP_Handler_fragments - start\n" |
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327 | |||
328 | cmp ecx, 65500 |
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329 | jg .dump |
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330 | |||
331 | cmp byte [edx + ICMP_Packet.Type], ICMP_ECHO ; Is this an echo request? discard if not |
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332 | jne .dump |
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333 | |||
334 | mov esi, [esp] |
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335 | |||
336 | sub ecx, ICMP_Packet.Data |
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337 | mov eax, [esi + IPv4_Packet.SourceAddress] |
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338 | mov ebx, [esi + IPv4_Packet.DestinationAddress] |
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339 | push word [esi + IPv4_Packet.Identification] |
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340 | |||
341 | mov di , [edx + ICMP_Packet.Identifier] |
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342 | shl edi, 16 |
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343 | mov di , [edx + ICMP_Packet.SequenceNumber] |
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344 | |||
345 | mov esi, edx |
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346 | add esi, ICMP_Packet.Data |
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347 | pop dx |
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348 | shl edx, 16 |
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349 | mov dx , ICMP_ECHOREPLY shl 8 + 0 ; Type + Code |
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350 | |||
351 | call ICMP_create_Packet |
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352 | |||
353 | .dump: |
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354 | DEBUGF 1,"ICMP_Handler_fragments - end\n" |
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355 | |||
356 | call kernel_free |
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1165 | hidnplayr | 357 | add esp, 8 ; pop (balance stack) |
1159 | hidnplayr | 358 | ret |
359 | |||
360 | ;----------------------------------------------------------------- |
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361 | ; |
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362 | ; Note: ICMP only works on top of IP protocol :) |
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363 | ; |
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364 | ; inputs: |
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365 | ; |
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366 | ; eax = dest ip |
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367 | ; ebx = source ip |
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368 | ; ecx = data length |
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369 | ; dh = type |
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370 | ; dl = code |
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371 | ; high 16 bits of edx = fragment id (for IP header) |
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372 | ; esi = data offset |
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373 | ; edi = identifier shl 16 + sequence number |
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374 | ; |
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375 | ;----------------------------------------------------------------- |
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376 | |||
377 | align 4 |
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378 | ICMP_create_Packet: |
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379 | |||
380 | DEBUGF 1,"Create ICMP Packet\n" |
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381 | |||
382 | push esi edi edx |
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383 | |||
384 | add ecx, ICMP_Packet.Data |
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385 | mov di , IP_PROTO_ICMP |
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386 | shr edx, 16 |
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387 | |||
388 | call IPv4_create_Packet |
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389 | |||
390 | cmp edi, -1 |
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391 | je .exit |
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392 | |||
1165 | hidnplayr | 393 | DEBUGF 1,"full icmp packet size: %u\n", ebx |
394 | |||
1159 | hidnplayr | 395 | pop eax |
396 | mov word [edi + ICMP_Packet.Type], ax ; Write both type and code bytes at once |
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397 | pop eax |
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398 | mov [edi + ICMP_Packet.SequenceNumber], ax |
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399 | shr eax, 16 |
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400 | mov [edi + ICMP_Packet.Identifier], ax |
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401 | mov [edi + ICMP_Packet.Checksum], 0 |
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402 | |||
403 | stdcall checksum_jb, edi , ecx |
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404 | xchg al, ah |
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405 | mov [edi + ICMP_Packet.Checksum], ax |
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406 | |||
407 | pop esi |
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408 | sub ecx, ICMP_Packet.Data |
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409 | add edi, ICMP_Packet.Data |
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410 | push cx |
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411 | shr cx , 2 |
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412 | rep movsd |
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413 | pop cx |
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414 | and cx , 3 |
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415 | rep movsb |
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416 | |||
417 | sub edi, ebx ;; TODO: find a better way to remember start of packet |
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418 | xchg ebx, edx |
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419 | mov ecx, [ebx + ETH_DEVICE.transmit] |
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420 | push edx edi ecx |
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421 | DEBUGF 1,"Sending ICMP Packet\n" |
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422 | ret ; Send the packet (create_packet routine outputs pointer to routine to send packet in eax) |
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423 | |||
424 | .exit: |
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1165 | hidnplayr | 425 | DEBUGF 1,"Creating ICMP Packet failed\n" |
426 | add esp, 3*4 |
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1159 | hidnplayr | 427 | ret |
428 | |||
429 | |||
430 | |||
431 | |||
432 | ;--------------------------------------------------------------------------- |
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433 | ; |
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434 | ; ICMP_API |
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435 | ; |
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436 | ; This function is called by system function 75 |
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437 | ; |
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438 | ; IN: subfunction number in bl |
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439 | ; device number in bh |
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440 | ; ecx, edx, .. depends on subfunction |
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441 | ; |
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442 | ; OUT: |
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443 | ; |
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444 | ;--------------------------------------------------------------------------- |
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445 | |||
446 | align 4 |
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447 | ICMP_API: |
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448 | |||
449 | movzx eax, bh |
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450 | shl eax, 2 |
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451 | |||
452 | test bl, bl |
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453 | jz .packets_tx ; 0 |
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454 | dec bl |
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455 | jz .packets_rx ; 1 |
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456 | |||
457 | .error: |
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458 | mov eax, -1 |
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459 | ret |
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460 | |||
461 | .packets_tx: |
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462 | add eax, ICMP_PACKETS_TX |
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463 | mov eax, [eax] |
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464 | ret |
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465 | |||
466 | .packets_rx: |
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467 | add eax, ICMP_PACKETS_RX |
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468 | mov eax, [eax] |
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469 | ret |