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3545 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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5363 | yogev_ezra | 3 | ;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;; |
3545 | hidnplayr | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;; UDP.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 | ;; Written by hidnplayr@kolibrios.org ;; |
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11 | ;; ;; |
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12 | ;; GNU GENERAL PUBLIC LICENSE ;; |
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13 | ;; Version 2, June 1991 ;; |
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14 | ;; ;; |
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15 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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16 | |||
4850 | mario79 | 17 | $Revision: 6011 $ |
3545 | hidnplayr | 18 | |
19 | |||
20 | struct UDP_header |
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21 | |||
22 | SourcePort dw ? |
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23 | DestinationPort dw ? |
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24 | Length dw ? ; Length of (UDP Header + Data) |
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25 | Checksum dw ? |
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26 | |||
27 | ends |
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28 | |||
29 | |||
3698 | hidnplayr | 30 | uglobal |
3545 | hidnplayr | 31 | align 4 |
3698 | hidnplayr | 32 | |
3600 | hidnplayr | 33 | UDP_PACKETS_TX rd NET_DEVICES_MAX |
34 | UDP_PACKETS_RX rd NET_DEVICES_MAX |
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3698 | hidnplayr | 35 | |
3545 | hidnplayr | 36 | endg |
37 | |||
38 | |||
5976 | hidnplayr | 39 | ;-----------------------------------------------------------------; |
40 | ; ; |
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6011 | hidnplayr | 41 | ; udp_init: This function resets all UDP variables ; |
5976 | hidnplayr | 42 | ; ; |
43 | ;-----------------------------------------------------------------; |
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6011 | hidnplayr | 44 | macro udp_init { |
3545 | hidnplayr | 45 | |
46 | xor eax, eax |
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47 | mov edi, UDP_PACKETS_TX |
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3600 | hidnplayr | 48 | mov ecx, 2*NET_DEVICES_MAX |
3711 | clevermous | 49 | rep stosd |
3545 | hidnplayr | 50 | } |
51 | |||
52 | |||
6011 | hidnplayr | 53 | macro udp_checksum IP1, IP2 { ; esi = ptr to udp packet, ecx = packet size, destroys: ecx, edx |
3545 | hidnplayr | 54 | |
55 | ; Pseudoheader |
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56 | mov edx, IP_PROTO_UDP |
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57 | |||
5842 | hidnplayr | 58 | add dl, byte[IP1+1] |
59 | adc dh, byte[IP1+0] |
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60 | adc dl, byte[IP1+3] |
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61 | adc dh, byte[IP1+2] |
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3545 | hidnplayr | 62 | |
5842 | hidnplayr | 63 | adc dl, byte[IP2+1] |
64 | adc dh, byte[IP2+0] |
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65 | adc dl, byte[IP2+3] |
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66 | adc dh, byte[IP2+2] |
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3545 | hidnplayr | 67 | |
68 | adc dl, cl ; byte[esi+UDP_header.Length+1] |
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69 | adc dh, ch ; byte[esi+UDP_header.Length+0] |
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70 | |||
71 | ; Done with pseudoheader, now do real header |
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72 | adc dl, byte[esi+UDP_header.SourcePort+1] |
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73 | adc dh, byte[esi+UDP_header.SourcePort+0] |
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74 | |||
75 | adc dl, byte[esi+UDP_header.DestinationPort+1] |
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76 | adc dh, byte[esi+UDP_header.DestinationPort+0] |
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77 | |||
78 | adc dl, byte[esi+UDP_header.Length+1] |
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79 | adc dh, byte[esi+UDP_header.Length+0] |
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80 | |||
81 | adc edx, 0 |
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82 | |||
83 | ; Done with header, now do data |
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84 | push esi |
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85 | movzx ecx, [esi+UDP_header.Length] |
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86 | rol cx , 8 |
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87 | sub cx , sizeof.UDP_header |
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88 | add esi, sizeof.UDP_header |
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89 | |||
90 | call checksum_1 |
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91 | call checksum_2 |
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92 | pop esi |
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93 | |||
94 | add [esi+UDP_header.Checksum], dx ; this final instruction will set or clear ZF :) |
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95 | |||
96 | } |
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97 | |||
98 | |||
5976 | hidnplayr | 99 | ;-----------------------------------------------------------------; |
100 | ; ; |
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6011 | hidnplayr | 101 | ; udp_input: Inject the UDP data in the application sockets. ; |
5976 | hidnplayr | 102 | ; ; |
103 | ; IN: [esp] = ptr to buffer ; |
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104 | ; ebx = ptr to device struct ; |
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105 | ; ecx = UDP packet size ; |
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106 | ; edx = ptr to IPv4 header ; |
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107 | ; esi = ptr to UDP packet data ; |
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108 | ; edi = interface number*4 ; |
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109 | ; ; |
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110 | ; OUT: / ; |
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111 | ; ; |
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112 | ;-----------------------------------------------------------------; |
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3545 | hidnplayr | 113 | align 4 |
6011 | hidnplayr | 114 | udp_input: |
3545 | hidnplayr | 115 | |
3556 | hidnplayr | 116 | DEBUGF DEBUG_NETWORK_VERBOSE, "UDP_input: size=%u\n", ecx |
3545 | hidnplayr | 117 | |
118 | ; First validate, checksum |
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119 | |||
120 | neg [esi + UDP_header.Checksum] ; substract checksum from 0 |
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121 | jz .no_checksum ; if checksum is zero, it is considered valid |
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122 | |||
123 | ; otherwise, we will re-calculate the checksum and add it to this value, thus creating 0 when it is correct |
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124 | |||
5842 | hidnplayr | 125 | mov eax, edx |
6011 | hidnplayr | 126 | udp_checksum (eax+IPv4_header.SourceAddress), (eax+IPv4_header.DestinationAddress) |
3545 | hidnplayr | 127 | jnz .checksum_mismatch |
128 | |||
129 | .no_checksum: |
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3556 | hidnplayr | 130 | DEBUGF DEBUG_NETWORK_VERBOSE, "UDP_input: checksum ok\n" |
3545 | hidnplayr | 131 | |
132 | ; Convert length to little endian |
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133 | |||
134 | rol [esi + UDP_header.Length], 8 |
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135 | |||
136 | ; Look for a socket where |
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137 | ; IP Packet UDP Destination Port = local Port |
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138 | ; IP Packet SA = Remote IP |
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139 | |||
3647 | hidnplayr | 140 | pusha |
141 | mov ecx, socket_mutex |
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142 | call mutex_lock |
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143 | popa |
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144 | |||
3545 | hidnplayr | 145 | mov cx, [esi + UDP_header.SourcePort] |
146 | mov dx, [esi + UDP_header.DestinationPort] |
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147 | mov eax, net_sockets |
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148 | .next_socket: |
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149 | mov eax, [eax + SOCKET.NextPtr] |
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150 | or eax, eax |
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5522 | hidnplayr | 151 | jz .unlock_dump |
3545 | hidnplayr | 152 | |
153 | cmp [eax + SOCKET.Domain], AF_INET4 |
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154 | jne .next_socket |
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155 | |||
156 | cmp [eax + SOCKET.Protocol], IP_PROTO_UDP |
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157 | jne .next_socket |
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158 | |||
159 | cmp [eax + UDP_SOCKET.LocalPort], dx |
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160 | jne .next_socket |
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161 | |||
3556 | hidnplayr | 162 | DEBUGF DEBUG_NETWORK_VERBOSE, "UDP_input: socket=%x\n", eax |
3545 | hidnplayr | 163 | |
3647 | hidnplayr | 164 | pusha |
165 | mov ecx, socket_mutex |
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166 | call mutex_unlock |
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167 | popa |
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168 | |||
5842 | hidnplayr | 169 | ;;; TODO: when packet is processed, check more sockets?! |
3545 | hidnplayr | 170 | |
5842 | hidnplayr | 171 | ; FIXME: check remote IP if possible |
172 | ; |
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3545 | hidnplayr | 173 | ; cmp [eax + IP_SOCKET.RemoteIP], 0xffffffff |
174 | ; je @f |
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5842 | hidnplayr | 175 | ; cmp [eax + IP_SOCKET.RemoteIP], |
3545 | hidnplayr | 176 | ; jne .next_socket |
177 | ; @@: |
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178 | |||
4030 | hidnplayr | 179 | cmp [eax + UDP_SOCKET.RemotePort], 0 |
3545 | hidnplayr | 180 | je .updateport |
181 | |||
182 | cmp [eax + UDP_SOCKET.RemotePort], cx |
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183 | jne .dump |
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184 | |||
185 | pusha |
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186 | lea ecx, [eax + SOCKET.mutex] |
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187 | call mutex_lock |
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188 | popa |
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189 | |||
190 | .updatesock: |
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3643 | hidnplayr | 191 | inc [UDP_PACKETS_RX + edi] |
3545 | hidnplayr | 192 | |
193 | movzx ecx, [esi + UDP_header.Length] |
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194 | sub ecx, sizeof.UDP_header |
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195 | add esi, sizeof.UDP_header |
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196 | |||
6011 | hidnplayr | 197 | jmp socket_input |
3545 | hidnplayr | 198 | |
199 | .updateport: |
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200 | pusha |
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201 | lea ecx, [eax + SOCKET.mutex] |
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202 | call mutex_lock |
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203 | popa |
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204 | |||
3556 | hidnplayr | 205 | DEBUGF DEBUG_NETWORK_VERBOSE, "UDP_input: new remote port=%x\n", cx ; FIXME: find a way to print big endian values with debugf |
3545 | hidnplayr | 206 | mov [eax + UDP_SOCKET.RemotePort], cx |
207 | jmp .updatesock |
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208 | |||
5522 | hidnplayr | 209 | .unlock_dump: |
3647 | hidnplayr | 210 | pusha |
211 | mov ecx, socket_mutex |
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212 | call mutex_unlock |
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213 | popa |
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214 | |||
215 | DEBUGF DEBUG_NETWORK_VERBOSE, "UDP_input: no socket found\n" |
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216 | jmp .dump |
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217 | |||
3545 | hidnplayr | 218 | .checksum_mismatch: |
3556 | hidnplayr | 219 | DEBUGF DEBUG_NETWORK_VERBOSE, "UDP_input: checksum mismatch\n" |
3545 | hidnplayr | 220 | |
221 | .dump: |
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5522 | hidnplayr | 222 | DEBUGF DEBUG_NETWORK_VERBOSE, "UDP_input: dumping\n" |
6011 | hidnplayr | 223 | call net_buff_free |
3545 | hidnplayr | 224 | ret |
225 | |||
226 | |||
227 | |||
5976 | hidnplayr | 228 | ;-----------------------------------------------------------------; |
229 | ; ; |
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6011 | hidnplayr | 230 | ; udp_output: Create an UDP packet. ; |
5976 | hidnplayr | 231 | ; ; |
232 | ; IN: eax = socket pointer ; |
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233 | ; ecx = number of bytes to send ; |
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234 | ; esi = pointer to data ; |
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235 | ; ; |
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236 | ; OUT: eax = -1 on error ; |
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237 | ; ; |
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238 | ;-----------------------------------------------------------------; |
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3545 | hidnplayr | 239 | |
240 | align 4 |
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6011 | hidnplayr | 241 | udp_output: |
3545 | hidnplayr | 242 | |
3556 | hidnplayr | 243 | DEBUGF DEBUG_NETWORK_VERBOSE, "UDP_output: socket=%x bytes=%u data_ptr=%x\n", eax, ecx, esi |
3545 | hidnplayr | 244 | |
245 | mov dx, [eax + UDP_SOCKET.RemotePort] |
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3556 | hidnplayr | 246 | DEBUGF DEBUG_NETWORK_VERBOSE, "UDP_output: remote port=%x, ", dx ; FIXME: find a way to print big endian values with debugf |
3545 | hidnplayr | 247 | rol edx, 16 |
248 | mov dx, [eax + UDP_SOCKET.LocalPort] |
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3556 | hidnplayr | 249 | DEBUGF DEBUG_NETWORK_VERBOSE, "local port=%x\n", dx |
3545 | hidnplayr | 250 | |
5522 | hidnplayr | 251 | sub esp, 4 ; Data ptr will be placed here |
3545 | hidnplayr | 252 | push edx esi |
5842 | hidnplayr | 253 | mov ebx, [eax + IP_SOCKET.device] |
3545 | hidnplayr | 254 | mov edx, [eax + IP_SOCKET.LocalIP] |
5842 | hidnplayr | 255 | mov edi, [eax + IP_SOCKET.RemoteIP] |
256 | mov al, [eax + IP_SOCKET.ttl] |
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257 | mov ah, IP_PROTO_UDP |
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3545 | hidnplayr | 258 | add ecx, sizeof.UDP_header |
6011 | hidnplayr | 259 | call ipv4_output |
3545 | hidnplayr | 260 | jz .fail |
261 | mov [esp + 8], eax ; pointer to buffer start |
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262 | |||
263 | mov [edi + UDP_header.Length], cx |
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264 | rol [edi + UDP_header.Length], 8 |
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265 | |||
266 | pop esi |
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267 | push edi ecx |
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268 | sub ecx, sizeof.UDP_header |
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269 | add edi, sizeof.UDP_header |
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270 | shr ecx, 2 |
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3711 | clevermous | 271 | rep movsd |
3545 | hidnplayr | 272 | mov ecx, [esp] |
273 | and ecx, 3 |
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3711 | clevermous | 274 | rep movsb |
3545 | hidnplayr | 275 | pop ecx edi |
276 | |||
277 | pop dword [edi + UDP_header.SourcePort] |
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278 | |||
279 | ; Checksum |
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280 | mov esi, edi |
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281 | mov [edi + UDP_header.Checksum], 0 |
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6011 | hidnplayr | 282 | udp_checksum (edi-4), (edi-8) ; FIXME: IPv4 packet could have options.. |
3545 | hidnplayr | 283 | |
3556 | hidnplayr | 284 | DEBUGF DEBUG_NETWORK_VERBOSE, "UDP_output: sending with device %x\n", ebx |
3545 | hidnplayr | 285 | call [ebx + NET_DEVICE.transmit] |
286 | test eax, eax |
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287 | jnz @f |
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6011 | hidnplayr | 288 | call net_ptr_to_num4 |
3643 | hidnplayr | 289 | inc [UDP_PACKETS_TX + edi] |
3545 | hidnplayr | 290 | @@: |
291 | |||
292 | ret |
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293 | |||
294 | .fail: |
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3556 | hidnplayr | 295 | DEBUGF DEBUG_NETWORK_ERROR, "UDP_output: failed\n" |
3545 | hidnplayr | 296 | add esp, 4+4+8 |
297 | or eax, -1 |
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298 | ret |
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299 | |||
300 | |||
301 | |||
4030 | hidnplayr | 302 | |
5976 | hidnplayr | 303 | ;-----------------------------------------------------------------; |
304 | ; ; |
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6011 | hidnplayr | 305 | ; udp_connect ; |
5976 | hidnplayr | 306 | ; ; |
307 | ; IN: eax = socket pointer ; |
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308 | ; ; |
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309 | ; OUT: eax = 0 on success ; |
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310 | ; eax = -1 on error ; |
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311 | ; ebx = error code on error ; |
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312 | ; ; |
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313 | ;-----------------------------------------------------------------; |
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4030 | hidnplayr | 314 | align 4 |
6011 | hidnplayr | 315 | udp_connect: |
4030 | hidnplayr | 316 | |
317 | test [eax + SOCKET.state], SS_ISCONNECTED |
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318 | jz @f |
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6011 | hidnplayr | 319 | call udp_disconnect |
4030 | hidnplayr | 320 | @@: |
321 | |||
4035 | hidnplayr | 322 | push eax edx |
4030 | hidnplayr | 323 | lea ecx, [eax + SOCKET.mutex] |
324 | call mutex_lock |
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4035 | hidnplayr | 325 | pop edx eax |
4030 | hidnplayr | 326 | |
327 | ; Fill in local IP |
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328 | cmp [eax + IP_SOCKET.LocalIP], 0 |
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329 | jne @f |
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330 | push [IP_LIST + 4] ; FIXME: use correct local IP |
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331 | pop [eax + IP_SOCKET.LocalIP] |
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332 | |||
333 | ; Fill in remote port and IP, overwriting eventually previous values |
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334 | pushw [edx + 2] |
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335 | pop [eax + UDP_SOCKET.RemotePort] |
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336 | |||
337 | pushd [edx + 4] |
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338 | pop [eax + IP_SOCKET.RemoteIP] |
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339 | |||
340 | ; Find a local port, if user didnt define one |
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341 | cmp [eax + UDP_SOCKET.LocalPort], 0 |
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342 | jne @f |
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6011 | hidnplayr | 343 | call socket_find_port |
4030 | hidnplayr | 344 | @@: |
345 | |||
346 | push eax |
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347 | lea ecx, [eax + SOCKET.mutex] |
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348 | call mutex_unlock |
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349 | pop eax |
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350 | |||
6011 | hidnplayr | 351 | call socket_is_connected |
4030 | hidnplayr | 352 | |
353 | xor eax, eax |
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354 | ret |
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355 | |||
356 | |||
5976 | hidnplayr | 357 | ;-----------------------------------------------------------------; |
358 | ; ; |
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359 | ; UDP_disconnect ; |
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360 | ; ; |
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361 | ; IN: eax = socket pointer ; |
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362 | ; ; |
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363 | ; OUT: eax = socket pointer ; |
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364 | ; ; |
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365 | ;-----------------------------------------------------------------; |
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4030 | hidnplayr | 366 | align 4 |
6011 | hidnplayr | 367 | udp_disconnect: |
4030 | hidnplayr | 368 | |
369 | ; TODO: remove the pending received data |
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370 | |||
6011 | hidnplayr | 371 | call socket_is_disconnected |
4030 | hidnplayr | 372 | |
373 | ret |
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374 | |||
375 | |||
376 | |||
377 | |||
378 | |||
5976 | hidnplayr | 379 | ;-----------------------------------------------------------------; |
380 | ; ; |
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6011 | hidnplayr | 381 | ; UDP_api: Part of system function 76 ; |
5976 | hidnplayr | 382 | ; ; |
383 | ; IN: bl = subfunction number in bl ; |
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384 | ; bh = device number in bh ; |
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385 | ; ecx, edx, .. depends on subfunction ; |
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386 | ; ; |
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387 | ; OUT: depends on subfunction ; |
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388 | ; ; |
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389 | ;-----------------------------------------------------------------; |
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3545 | hidnplayr | 390 | align 4 |
6011 | hidnplayr | 391 | udp_api: |
3545 | hidnplayr | 392 | |
393 | movzx eax, bh |
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394 | shl eax, 2 |
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395 | |||
396 | test bl, bl |
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397 | jz .packets_tx ; 0 |
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398 | dec bl |
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399 | jz .packets_rx ; 1 |
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400 | |||
401 | .error: |
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402 | mov eax, -1 |
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403 | ret |
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404 | |||
405 | .packets_tx: |
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406 | mov eax, [UDP_PACKETS_TX + eax] |
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407 | ret |
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408 | |||
409 | .packets_rx: |
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410 | mov eax, [UDP_PACKETS_RX + eax] |
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411 | ret |