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1159 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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2877 | hidnplayr | 3 | ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;; |
1159 | 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 | |||
1206 | hidnplayr | 17 | $Revision: 2995 $ |
1159 | hidnplayr | 18 | |
19 | |||
2310 | hidnplayr | 20 | struct UDP_header |
1159 | hidnplayr | 21 | |
2308 | hidnplayr | 22 | SourcePort dw ? |
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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2305 | hidnplayr | 26 | |
1159 | hidnplayr | 27 | ends |
28 | |||
29 | |||
30 | align 4 |
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31 | uglobal |
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2924 | hidnplayr | 32 | UDP_PACKETS_TX rd MAX_NET_DEVICES |
33 | UDP_PACKETS_RX rd MAX_NET_DEVICES |
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1159 | hidnplayr | 34 | endg |
35 | |||
36 | |||
37 | ;----------------------------------------------------------------- |
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38 | ; |
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39 | ; UDP_init |
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40 | ; |
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41 | ; This function resets all UDP variables |
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42 | ; |
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43 | ;----------------------------------------------------------------- |
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2308 | hidnplayr | 44 | macro UDP_init { |
1159 | hidnplayr | 45 | |
2308 | hidnplayr | 46 | xor eax, eax |
47 | mov edi, UDP_PACKETS_TX |
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2924 | hidnplayr | 48 | mov ecx, 2*MAX_NET_DEVICES |
2308 | hidnplayr | 49 | rep stosd |
1529 | hidnplayr | 50 | } |
1159 | hidnplayr | 51 | |
52 | |||
2308 | hidnplayr | 53 | macro UDP_checksum IP1, IP2 { ; esi = ptr to udp packet, ecx = packet size, destroys: ecx, edx |
1529 | hidnplayr | 54 | |
55 | ; Pseudoheader |
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2308 | hidnplayr | 56 | mov edx, IP_PROTO_UDP |
1529 | hidnplayr | 57 | |
2308 | hidnplayr | 58 | add dl, [IP1+1] |
59 | adc dh, [IP1+0] |
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60 | adc dl, [IP1+3] |
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61 | adc dh, [IP1+2] |
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1529 | hidnplayr | 62 | |
2308 | hidnplayr | 63 | adc dl, [IP2+1] |
64 | adc dh, [IP2+0] |
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65 | adc dl, [IP2+3] |
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66 | adc dh, [IP2+2] |
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1529 | hidnplayr | 67 | |
2310 | hidnplayr | 68 | adc dl, cl ; byte[esi+UDP_header.Length+1] |
69 | adc dh, ch ; byte[esi+UDP_header.Length+0] |
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1529 | hidnplayr | 70 | |
71 | ; Done with pseudoheader, now do real header |
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2310 | hidnplayr | 72 | adc dl, byte[esi+UDP_header.SourcePort+1] |
73 | adc dh, byte[esi+UDP_header.SourcePort+0] |
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1529 | hidnplayr | 74 | |
2310 | hidnplayr | 75 | adc dl, byte[esi+UDP_header.DestinationPort+1] |
76 | adc dh, byte[esi+UDP_header.DestinationPort+0] |
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1529 | hidnplayr | 77 | |
2310 | hidnplayr | 78 | adc dl, byte[esi+UDP_header.Length+1] |
79 | adc dh, byte[esi+UDP_header.Length+0] |
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1529 | hidnplayr | 80 | |
2308 | hidnplayr | 81 | adc edx, 0 |
1529 | hidnplayr | 82 | |
83 | ; Done with header, now do data |
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2308 | hidnplayr | 84 | push esi |
2310 | hidnplayr | 85 | movzx ecx, [esi+UDP_header.Length] |
2308 | hidnplayr | 86 | rol cx , 8 |
2310 | hidnplayr | 87 | sub cx , sizeof.UDP_header |
88 | add esi, sizeof.UDP_header |
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1529 | hidnplayr | 89 | |
2308 | hidnplayr | 90 | call checksum_1 |
91 | call checksum_2 |
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92 | pop esi |
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1529 | hidnplayr | 93 | |
2310 | hidnplayr | 94 | add [esi+UDP_header.Checksum], dx ; this final instruction will set or clear ZF :) |
1529 | hidnplayr | 95 | |
96 | } |
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97 | |||
98 | |||
1159 | hidnplayr | 99 | ;----------------------------------------------------------------- |
100 | ; |
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1514 | hidnplayr | 101 | ; UDP_input: |
1159 | hidnplayr | 102 | ; |
1514 | hidnplayr | 103 | ; Called by IPv4_input, |
1159 | hidnplayr | 104 | ; this procedure will inject the udp data diagrams in the application sockets. |
105 | ; |
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1529 | hidnplayr | 106 | ; IN: [esp] = Pointer to buffer |
107 | ; [esp+4] = size of buffer |
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108 | ; ebx = ptr to device struct |
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109 | ; ecx = UDP Packet size |
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2310 | hidnplayr | 110 | ; esi = ptr to UDP header |
2308 | hidnplayr | 111 | ; edi = ptr to ipv4 source and dest address |
1484 | hidnplayr | 112 | ; |
1159 | hidnplayr | 113 | ; OUT: / |
114 | ; |
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115 | ;----------------------------------------------------------------- |
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1206 | hidnplayr | 116 | align 4 |
1514 | hidnplayr | 117 | UDP_input: |
1159 | hidnplayr | 118 | |
2891 | hidnplayr | 119 | DEBUGF 1,"UDP_input: size=%u\n", ecx |
1473 | hidnplayr | 120 | |
2390 | hidnplayr | 121 | ; First validate, checksum |
2310 | hidnplayr | 122 | |
123 | neg [esi + UDP_header.Checksum] ; substract checksum from 0 |
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2390 | hidnplayr | 124 | jz .no_checksum ; if checksum is zero, it is considered valid |
1159 | hidnplayr | 125 | |
2390 | hidnplayr | 126 | ; otherwise, we will re-calculate the checksum and add it to this value, thus creating 0 when it is correct |
127 | |||
2308 | hidnplayr | 128 | UDP_checksum (edi), (edi+4) |
2390 | hidnplayr | 129 | jnz .checksum_mismatch |
1249 | hidnplayr | 130 | |
1473 | hidnplayr | 131 | .no_checksum: |
2891 | hidnplayr | 132 | DEBUGF 1,"UDP_input: checksum ok\n" |
1473 | hidnplayr | 133 | |
2995 | hidnplayr | 134 | ; Convert length to little endian |
2310 | hidnplayr | 135 | |
2369 | hidnplayr | 136 | rol [esi + UDP_header.Length], 8 |
2310 | hidnplayr | 137 | |
2308 | hidnplayr | 138 | ; Look for a socket where |
139 | ; IP Packet UDP Destination Port = local Port |
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140 | ; IP Packet SA = Remote IP |
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1159 | hidnplayr | 141 | |
2369 | hidnplayr | 142 | mov cx, [esi + UDP_header.SourcePort] |
143 | mov dx, [esi + UDP_header.DestinationPort] |
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2310 | hidnplayr | 144 | mov edi, [edi + 4] ; ipv4 source address |
2308 | hidnplayr | 145 | mov eax, net_sockets |
2310 | hidnplayr | 146 | |
1159 | hidnplayr | 147 | .next_socket: |
2308 | hidnplayr | 148 | mov eax, [eax + SOCKET.NextPtr] |
149 | or eax, eax |
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150 | jz .dump |
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2310 | hidnplayr | 151 | |
2308 | hidnplayr | 152 | cmp [eax + SOCKET.Domain], AF_INET4 |
153 | jne .next_socket |
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2310 | hidnplayr | 154 | |
2308 | hidnplayr | 155 | cmp [eax + SOCKET.Protocol], IP_PROTO_UDP |
156 | jne .next_socket |
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2310 | hidnplayr | 157 | |
2369 | hidnplayr | 158 | cmp [eax + UDP_SOCKET.LocalPort], dx |
2308 | hidnplayr | 159 | jne .next_socket |
1159 | hidnplayr | 160 | |
2891 | hidnplayr | 161 | DEBUGF 1,"UDP_input: socket=%x\n", eax |
1208 | hidnplayr | 162 | |
2308 | hidnplayr | 163 | ;;; TODO: when packet is processed, check more sockets! |
1159 | hidnplayr | 164 | |
2366 | hidnplayr | 165 | ; cmp [eax + IP_SOCKET.RemoteIP], 0xffffffff |
166 | ; je @f |
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167 | ; cmp [eax + IP_SOCKET.RemoteIP], edi |
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168 | ; jne .next_socket |
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169 | ; @@: |
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170 | ; |
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171 | ; FIXME: UDP should check remote IP, but not under all circumstances! |
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1159 | hidnplayr | 172 | |
2308 | hidnplayr | 173 | cmp [eax + UDP_SOCKET.firstpacket], 0 |
2311 | hidnplayr | 174 | je .updateport |
1159 | hidnplayr | 175 | |
2310 | hidnplayr | 176 | cmp [eax + UDP_SOCKET.RemotePort], cx |
2308 | hidnplayr | 177 | jne .dump |
1159 | hidnplayr | 178 | |
2402 | hidnplayr | 179 | pusha |
180 | lea ecx, [eax + SOCKET.mutex] |
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181 | call mutex_lock |
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182 | popa |
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1337 | hidnplayr | 183 | |
1514 | hidnplayr | 184 | .updatesock: |
2891 | hidnplayr | 185 | inc [UDP_PACKETS_RX] ; Fixme: correct interface? |
186 | |||
2369 | hidnplayr | 187 | movzx ecx, [esi + UDP_header.Length] |
2310 | hidnplayr | 188 | sub ecx, sizeof.UDP_header |
2369 | hidnplayr | 189 | add esi, sizeof.UDP_header |
1159 | hidnplayr | 190 | |
2308 | hidnplayr | 191 | jmp SOCKET_input |
1159 | hidnplayr | 192 | |
1335 | hidnplayr | 193 | .updateport: |
2402 | hidnplayr | 194 | pusha |
195 | lea ecx, [eax + SOCKET.mutex] |
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196 | call mutex_lock |
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197 | popa |
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1337 | hidnplayr | 198 | |
2995 | hidnplayr | 199 | DEBUGF 1,"UDP_input: new remote port=%x\n", cx ; FIXME: find a way to print big endian values with debugf |
2311 | hidnplayr | 200 | mov [eax + UDP_SOCKET.RemotePort], cx |
2308 | hidnplayr | 201 | inc [eax + UDP_SOCKET.firstpacket] |
1335 | hidnplayr | 202 | |
2308 | hidnplayr | 203 | jmp .updatesock |
1335 | hidnplayr | 204 | |
1483 | hidnplayr | 205 | |
1473 | hidnplayr | 206 | .checksum_mismatch: |
2891 | hidnplayr | 207 | DEBUGF 2,"UDP_input: checksum mismatch\n" |
1473 | hidnplayr | 208 | |
1206 | hidnplayr | 209 | .dump: |
2308 | hidnplayr | 210 | call kernel_free |
211 | add esp, 4 ; pop (balance stack) |
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2891 | hidnplayr | 212 | DEBUGF 2,"UDP_input: dumping\n" |
1159 | hidnplayr | 213 | |
2308 | hidnplayr | 214 | ret |
1159 | hidnplayr | 215 | |
216 | |||
217 | |||
218 | |||
219 | ;----------------------------------------------------------------- |
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220 | ; |
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1514 | hidnplayr | 221 | ; UDP_output |
1159 | hidnplayr | 222 | ; |
1249 | hidnplayr | 223 | ; IN: eax = socket pointer |
224 | ; ecx = number of bytes to send |
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225 | ; esi = pointer to data |
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1159 | hidnplayr | 226 | ; |
227 | ;----------------------------------------------------------------- |
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228 | |||
1249 | hidnplayr | 229 | align 4 |
1514 | hidnplayr | 230 | UDP_output: |
1159 | hidnplayr | 231 | |
2891 | hidnplayr | 232 | DEBUGF 1,"UDP_output: socket=%x bytes=%u data_ptr=%x\n", eax, ecx, esi |
1249 | hidnplayr | 233 | |
2308 | hidnplayr | 234 | mov dx, [eax + UDP_SOCKET.RemotePort] |
2995 | hidnplayr | 235 | DEBUGF 1,"UDP_output: remote port=%x, ", dx ; FIXME: find a way to print big endian values with debugf |
2308 | hidnplayr | 236 | rol edx, 16 |
237 | mov dx, [eax + UDP_SOCKET.LocalPort] |
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2995 | hidnplayr | 238 | DEBUGF 1,"local port=%x\n", dx |
1159 | hidnplayr | 239 | |
2877 | hidnplayr | 240 | sub esp, 8 ; Data ptr and data size will be placed here |
241 | push edx esi |
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242 | mov ebx, [eax + SOCKET.device] |
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243 | mov edx, [eax + IP_SOCKET.LocalIP] |
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2308 | hidnplayr | 244 | mov eax, [eax + IP_SOCKET.RemoteIP] |
245 | mov di, IP_PROTO_UDP shl 8 + 128 |
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2310 | hidnplayr | 246 | add ecx, sizeof.UDP_header |
2308 | hidnplayr | 247 | call IPv4_output |
248 | jz .fail |
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249 | mov [esp + 8], eax ; pointer to buffer start |
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250 | mov [esp + 8 + 4], edx ; buffer size |
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1159 | hidnplayr | 251 | |
2310 | hidnplayr | 252 | mov [edi + UDP_header.Length], cx |
253 | rol [edi + UDP_header.Length], 8 |
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1249 | hidnplayr | 254 | |
2308 | hidnplayr | 255 | pop esi |
256 | push edi ecx |
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2310 | hidnplayr | 257 | sub ecx, sizeof.UDP_header |
258 | add edi, sizeof.UDP_header |
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2308 | hidnplayr | 259 | shr ecx, 2 |
260 | rep movsd |
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261 | mov ecx, [esp] |
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262 | and ecx, 3 |
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263 | rep movsb |
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264 | pop ecx edi |
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1159 | hidnplayr | 265 | |
2310 | hidnplayr | 266 | pop dword [edi + UDP_header.SourcePort] |
1159 | hidnplayr | 267 | |
1482 | hidnplayr | 268 | ; Checksum |
2308 | hidnplayr | 269 | mov esi, edi |
2310 | hidnplayr | 270 | mov [edi + UDP_header.Checksum], 0 |
2890 | hidnplayr | 271 | UDP_checksum (edi-4), (edi-8) ; FIXME: IPv4 packet could have options.. |
1159 | hidnplayr | 272 | |
2980 | hidnplayr | 273 | DEBUGF 1,"UDP_output: sending with device %x\n", ebx |
274 | call [ebx + NET_DEVICE.transmit] |
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275 | test eax, eax |
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276 | jnz @f |
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2890 | hidnplayr | 277 | inc [UDP_PACKETS_TX] ; FIXME: correct device? |
2980 | hidnplayr | 278 | @@: |
1206 | hidnplayr | 279 | |
2308 | hidnplayr | 280 | ret |
1529 | hidnplayr | 281 | |
1206 | hidnplayr | 282 | .fail: |
2308 | hidnplayr | 283 | DEBUGF 1,"UDP_output: failed\n" |
284 | add esp, 4+4+8 |
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2390 | hidnplayr | 285 | or eax, -1 |
2308 | hidnplayr | 286 | ret |
1159 | hidnplayr | 287 | |
288 | |||
1206 | hidnplayr | 289 | |
1159 | hidnplayr | 290 | ;--------------------------------------------------------------------------- |
291 | ; |
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292 | ; UDP_API |
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293 | ; |
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294 | ; This function is called by system function 75 |
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295 | ; |
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296 | ; IN: subfunction number in bl |
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297 | ; device number in bh |
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298 | ; ecx, edx, .. depends on subfunction |
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299 | ; |
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300 | ; OUT: |
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301 | ; |
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302 | ;--------------------------------------------------------------------------- |
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303 | |||
304 | align 4 |
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2614 | hidnplayr | 305 | UDP_api: |
1159 | hidnplayr | 306 | |
2308 | hidnplayr | 307 | movzx eax, bh |
308 | shl eax, 2 |
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1159 | hidnplayr | 309 | |
2308 | hidnplayr | 310 | test bl, bl |
311 | jz .packets_tx ; 0 |
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312 | dec bl |
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313 | jz .packets_rx ; 1 |
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1159 | hidnplayr | 314 | |
2614 | hidnplayr | 315 | .error: |
2308 | hidnplayr | 316 | mov eax, -1 |
317 | ret |
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1159 | hidnplayr | 318 | |
2614 | hidnplayr | 319 | .packets_tx: |
2311 | hidnplayr | 320 | mov eax, [UDP_PACKETS_TX + eax] |
2308 | hidnplayr | 321 | ret |
1159 | hidnplayr | 322 | |
2614 | hidnplayr | 323 | .packets_rx: |
2311 | hidnplayr | 324 | mov eax, [UDP_PACKETS_RX + eax] |
2308 | hidnplayr | 325 | ret |