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1196 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2009. 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 | ;; TCP.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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1159 | hidnplayr | 16 | |
1196 | hidnplayr | 17 | |
1206 | hidnplayr | 18 | $Revision: 1274 $ |
1159 | hidnplayr | 19 | |
1196 | hidnplayr | 20 | TCP_RETRIES equ 5 ; Number of times to resend a Packet |
1254 | hidnplayr | 21 | TCP_PACKET_TTL equ 50 ; resend if not replied to in 1/100 s |
22 | TCP_SOCKET_TTL equ 10 ; # of secs to wait before closing socket |
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1196 | hidnplayr | 23 | TCP_QUEUE_SIZE equ 16 |
24 | |||
1249 | hidnplayr | 25 | |
1159 | hidnplayr | 26 | struct TCP_Packet |
27 | .SourcePort dw ? |
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28 | .DestinationPort dw ? |
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29 | .SequenceNumber dd ? |
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30 | .AckNumber dd ? |
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1196 | hidnplayr | 31 | .DataOffset db ? ; DataOffset[0-3 bits] and Reserved[4-7] |
32 | .Flags db ? ; Reserved[0-1 bits]|URG|ACK|PSH|RST|SYN|FIN |
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1159 | hidnplayr | 33 | .Window dw ? |
34 | .Checksum dw ? |
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35 | .UrgentPointer dw ? |
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1274 | hidnplayr | 36 | ; .Options rb 3 |
37 | ; .Padding db ? |
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1159 | hidnplayr | 38 | .Data: |
39 | ends |
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40 | |||
1274 | hidnplayr | 41 | struct tcp_in_queue_entry |
42 | .data_ptr dd ? |
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43 | .data_size dd ? |
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44 | .offset dd ? |
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45 | .size: |
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46 | ends |
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47 | |||
48 | struct tcp_out_queue_entry |
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49 | .data_ptr dd ? |
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50 | .data_size dd ? |
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51 | .ttl dd ? |
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52 | .retries dd ? |
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53 | .owner dd ? |
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54 | .sendproc dd ? |
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55 | .seq_num dd ? |
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56 | .socket dd ? |
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57 | .size: |
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58 | ends |
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59 | |||
1196 | hidnplayr | 60 | align 4 |
61 | uglobal |
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62 | TCP_PACKETS_TX rd MAX_IP |
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63 | TCP_PACKETS_RX rd MAX_IP |
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1159 | hidnplayr | 64 | |
1249 | hidnplayr | 65 | TCP_IN_QUEUE rd (tcp_in_queue_entry.size*TCP_QUEUE_SIZE+queue.data)/4 |
1254 | hidnplayr | 66 | TCP_OUT_QUEUE dd ? |
1249 | hidnplayr | 67 | rd (tcp_out_queue_entry.size*TCP_QUEUE_SIZE)/4 |
1196 | hidnplayr | 68 | endg |
69 | |||
1249 | hidnplayr | 70 | align 4 |
71 | iglobal |
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1254 | hidnplayr | 72 | stateHandler: |
1196 | hidnplayr | 73 | |
1249 | hidnplayr | 74 | dd stateTCB_LISTEN |
75 | dd stateTCB_SYN_SENT |
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76 | dd stateTCB_SYN_RECEIVED |
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77 | dd stateTCB_ESTABLISHED |
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78 | dd stateTCB_FIN_WAIT_1 |
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79 | dd stateTCB_FIN_WAIT_2 |
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80 | dd stateTCB_CLOSE_WAIT |
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81 | dd stateTCB_CLOSING |
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82 | dd stateTCB_LAST_ACK |
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83 | dd stateTCB_TIME_WAIT |
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84 | dd stateTCB_CLOSED |
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1196 | hidnplayr | 85 | |
1249 | hidnplayr | 86 | endg |
1196 | hidnplayr | 87 | |
1249 | hidnplayr | 88 | |
1196 | hidnplayr | 89 | ;----------------------------------------------------------------- |
90 | ; |
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91 | ; TCP_init |
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92 | ; |
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93 | ; This function resets all TCP variables |
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94 | ; |
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95 | ; IN: / |
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96 | ; OUT: / |
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97 | ; |
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98 | ;----------------------------------------------------------------- |
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99 | align 4 |
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100 | TCP_init: |
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101 | |||
102 | xor eax, eax |
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103 | mov edi, TCP_PACKETS_TX |
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104 | mov ecx, 2*MAX_IP |
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105 | rep stosd |
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106 | |||
1249 | hidnplayr | 107 | init_queue TCP_IN_QUEUE |
1196 | hidnplayr | 108 | |
1274 | hidnplayr | 109 | ; tcp_out_queue is a special type of queue: |
110 | ; The first dword is a counter of total packets queued. |
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111 | ; The remaining bytes are socket 'slots' wich use tcp_out_queue_entry data structure. |
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112 | ; An empty slot is know by the fact that tcp_out_queue_entry.data_ptr (first dword of the slot) is set to 0 |
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113 | ; There are TCP_OUT_QUEUE_SIZE number of slots |
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1257 | hidnplayr | 114 | |
1254 | hidnplayr | 115 | xor eax, eax |
116 | mov esi, TCP_OUT_QUEUE |
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117 | mov ecx, TCP_QUEUE_SIZE*tcp_out_queue_entry/4+1 |
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118 | rep stosd |
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119 | |||
1196 | hidnplayr | 120 | ret |
121 | |||
122 | |||
123 | ;----------------------------------------------------------------- |
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124 | ; |
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1249 | hidnplayr | 125 | ; TCP_decrease_socket_ttls |
1159 | hidnplayr | 126 | ; |
1249 | hidnplayr | 127 | ; IN: / |
128 | ; OUT: / |
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1159 | hidnplayr | 129 | ; |
1196 | hidnplayr | 130 | ;----------------------------------------------------------------- |
131 | align 4 |
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1249 | hidnplayr | 132 | TCP_decrease_socket_ttls: |
1274 | hidnplayr | 133 | ; scan through all the sockets, decrementing active timers |
1159 | hidnplayr | 134 | |
135 | mov ebx, net_sockets |
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136 | |||
1249 | hidnplayr | 137 | cmp [ebx + SOCKET_head.NextPtr], 0 |
1159 | hidnplayr | 138 | je .exit |
139 | |||
140 | .next_socket: |
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1249 | hidnplayr | 141 | mov ebx, [ebx + SOCKET_head.NextPtr] |
1159 | hidnplayr | 142 | or ebx, ebx |
143 | jz .exit |
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144 | |||
1249 | hidnplayr | 145 | cmp [ebx + SOCKET_head.Type], IP_PROTO_TCP |
146 | jne .next_socket |
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147 | |||
1254 | hidnplayr | 148 | ; DEBUGF 1, "K : %x-%x: %x-%x-%x-%u\n", [ebx + SOCKET.PID]:2, [ebx + SOCKET.Number]:2, [ebx + SOCKET.LocalPort]:4, [ebx + SOCKET.RemoteIP], [ebx + SOCKET.RemotePort]:4, [ebx + SOCKET.state] |
1159 | hidnplayr | 149 | |
1254 | hidnplayr | 150 | cmp [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.timer], 0 |
1159 | hidnplayr | 151 | jne .decrement_tcb |
1249 | hidnplayr | 152 | cmp [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.wndsizeTimer], 0 |
1159 | hidnplayr | 153 | jne .decrement_wnd |
154 | jmp .next_socket |
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155 | |||
156 | .decrement_tcb: |
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1274 | hidnplayr | 157 | ; decrement it, delete socket if TCB timer = 0 & socket in timewait state |
1254 | hidnplayr | 158 | dec [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.timer] |
1159 | hidnplayr | 159 | jnz .next_socket |
160 | |||
1254 | hidnplayr | 161 | cmp [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_TIMED_WAIT |
1159 | hidnplayr | 162 | jne .next_socket |
163 | |||
1249 | hidnplayr | 164 | push [ebx + SOCKET_head.PrevPtr] |
1159 | hidnplayr | 165 | stdcall net_socket_free, ebx |
166 | pop ebx |
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167 | jmp .next_socket |
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168 | |||
169 | .decrement_wnd: |
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1249 | hidnplayr | 170 | dec [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.wndsizeTimer] |
1159 | hidnplayr | 171 | jmp .next_socket |
172 | |||
173 | .exit: |
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174 | ret |
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175 | |||
176 | |||
1249 | hidnplayr | 177 | |
178 | ;----------------------------------------------------------------- |
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1159 | hidnplayr | 179 | ; |
1249 | hidnplayr | 180 | ; TCP_send_queued: |
1159 | hidnplayr | 181 | ; |
1249 | hidnplayr | 182 | ; Decreases 'ttl' of tcp packets queued. |
183 | ; if 'ttl' reaches 0, resend the packet and decrease 'retries' |
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184 | ; if 'retries' reaches zero, remove the queued packet |
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185 | ; |
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186 | ; IN: / |
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187 | ; OUT: / |
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188 | ; |
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189 | ;----------------------------------------------------------------- |
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1196 | hidnplayr | 190 | align 4 |
1249 | hidnplayr | 191 | TCP_send_queued: |
1159 | hidnplayr | 192 | |
1249 | hidnplayr | 193 | cmp [TCP_OUT_QUEUE], 0 |
194 | je .exit |
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1159 | hidnplayr | 195 | |
1249 | hidnplayr | 196 | mov eax, TCP_QUEUE_SIZE |
197 | mov ecx, [TCP_OUT_QUEUE] |
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198 | mov esi, TCP_OUT_QUEUE+4 |
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1159 | hidnplayr | 199 | |
1249 | hidnplayr | 200 | .loop: |
201 | cmp [esi + tcp_out_queue_entry.data_ptr], 0 |
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202 | jnz .found_one |
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203 | add esi, tcp_out_queue_entry.size |
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204 | loop .loop |
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205 | .exit: |
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206 | ret |
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1159 | hidnplayr | 207 | |
1249 | hidnplayr | 208 | .found_one: |
209 | dec [esi + tcp_out_queue_entry.ttl] |
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210 | jz .send_it |
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211 | .find_next: |
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1254 | hidnplayr | 212 | add esi, tcp_out_queue_entry.size |
1249 | hidnplayr | 213 | dec eax |
214 | jz .exit |
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1254 | hidnplayr | 215 | test ecx, ecx |
216 | jnz .loop |
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217 | ret |
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1159 | hidnplayr | 218 | |
1249 | hidnplayr | 219 | .send_it: |
220 | push eax ecx esi |
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1159 | hidnplayr | 221 | |
1254 | hidnplayr | 222 | mov ebx, [esi + tcp_out_queue_entry.owner] |
1249 | hidnplayr | 223 | push [esi + tcp_out_queue_entry.data_size] |
224 | push [esi + tcp_out_queue_entry.data_ptr] |
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1254 | hidnplayr | 225 | DEBUGF 1,"Now sending TCP packet %x, size: %u, owner: %x, sendproc %x\n", [esp], [esp+4], ebx, [esi + tcp_out_queue_entry.sendproc] |
1257 | hidnplayr | 226 | inc [TCP_PACKETS_TX] |
1249 | hidnplayr | 227 | call [esi + tcp_out_queue_entry.sendproc] |
1254 | hidnplayr | 228 | add esp, 8 |
1249 | hidnplayr | 229 | pop esi ecx eax |
1159 | hidnplayr | 230 | |
1249 | hidnplayr | 231 | dec [esi + tcp_out_queue_entry.retries] |
232 | jz .remove_it |
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1254 | hidnplayr | 233 | |
234 | mov [esi + tcp_out_queue_entry.ttl], TCP_PACKET_TTL |
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1249 | hidnplayr | 235 | jmp .find_next |
1159 | hidnplayr | 236 | |
1249 | hidnplayr | 237 | .remove_it: |
238 | push [esi + tcp_out_queue_entry.data_ptr] |
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239 | mov [esi + tcp_out_queue_entry.data_ptr], 0 |
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240 | call kernel_free |
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241 | jmp .find_next |
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1159 | hidnplayr | 242 | |
243 | |||
244 | |||
1249 | hidnplayr | 245 | ;----------------------------------------------------------------- |
246 | ; |
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247 | ; TCP_handler: |
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1159 | hidnplayr | 248 | ; |
1196 | hidnplayr | 249 | ; Called by IPv4_handler, |
250 | ; this procedure will inject the tcp data diagrams in the application sockets. |
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251 | ; |
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252 | ; IN: Pointer to buffer in [esp] |
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253 | ; size of buffer in [esp+4] |
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254 | ; pointer to device struct in ebx |
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255 | ; TCP Packet size in ecx |
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1274 | hidnplayr | 256 | ; pointer to TCP Packet in edx |
257 | ; SourceAddres (IPv4) in esi |
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1196 | hidnplayr | 258 | ; OUT: / |
259 | ; |
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260 | ;----------------------------------------------------------------- |
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1249 | hidnplayr | 261 | align 4 |
262 | TCP_handler : |
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1159 | hidnplayr | 263 | |
1196 | hidnplayr | 264 | DEBUGF 1,"TCP_Handler\n" |
265 | |||
1274 | hidnplayr | 266 | ; TODO: validate checksum |
1254 | hidnplayr | 267 | |
1274 | hidnplayr | 268 | ; IP Packet TCP Destination Port = local Port |
269 | ; IP Packet SA = Remote IP OR = 0 |
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270 | ; IP Packet TCP Source Port = remote Port OR = 0 |
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1159 | hidnplayr | 271 | |
272 | mov ebx, net_sockets |
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273 | |||
1249 | hidnplayr | 274 | .socket_loop: |
275 | mov ebx, [ebx + SOCKET_head.NextPtr] |
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1159 | hidnplayr | 276 | or ebx, ebx |
1249 | hidnplayr | 277 | jz .dump |
1159 | hidnplayr | 278 | |
1249 | hidnplayr | 279 | mov ax, [edx + TCP_Packet.DestinationPort] |
280 | cmp [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.LocalPort], ax |
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281 | jne .socket_loop |
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1159 | hidnplayr | 282 | |
1249 | hidnplayr | 283 | mov eax, [ebx + SOCKET_head.end + IPv4_SOCKET.RemoteIP] |
284 | cmp eax, esi |
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285 | je @f |
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286 | test eax, eax |
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287 | jne .socket_loop |
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288 | @@: |
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1159 | hidnplayr | 289 | |
1249 | hidnplayr | 290 | mov ax, [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RemotePort] |
291 | cmp [edx + TCP_Packet.SourcePort] , ax |
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1274 | hidnplayr | 292 | je .found_socket |
1249 | hidnplayr | 293 | test ax, ax |
1254 | hidnplayr | 294 | jnz .socket_loop |
1274 | hidnplayr | 295 | .found_socket: |
1254 | hidnplayr | 296 | DEBUGF 1,"Found valid socket for packet\n" |
297 | |||
1257 | hidnplayr | 298 | inc [TCP_PACKETS_RX] |
299 | |||
1274 | hidnplayr | 300 | add ebx, SOCKET_head.lock |
1249 | hidnplayr | 301 | call wait_mutex |
1274 | hidnplayr | 302 | sub ebx, SOCKET_head.lock |
1159 | hidnplayr | 303 | |
1274 | hidnplayr | 304 | ;------------------------------- |
1249 | hidnplayr | 305 | ; ebx is pointer to socket |
306 | ; ecx is size of tcp packet |
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307 | ; edx is pointer to tcp packet |
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1159 | hidnplayr | 308 | |
1274 | hidnplayr | 309 | ; calculate header length |
310 | movzx eax, [edx + TCP_Packet.DataOffset] |
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311 | and eax, 11110000b |
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312 | shr eax, 2 |
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313 | DEBUGF 1,"TCP header size: %u\n", eax |
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314 | sub ecx, eax |
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315 | |||
316 | ;------------------------------- |
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317 | ; ecx is size of tcp data |
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318 | |||
319 | ; as a Packet has been received, update the TCB timer |
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1254 | hidnplayr | 320 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.timer], TCP_SOCKET_TTL |
1159 | hidnplayr | 321 | |
1274 | hidnplayr | 322 | ; If the received Packet has an ACK bit set, remove any Packets in the resend queue that this received Packet acknowledges |
1249 | hidnplayr | 323 | test [edx + TCP_Packet.Flags], TH_ACK |
1274 | hidnplayr | 324 | jz .no_ack ; No ACK, so no data yet |
1159 | hidnplayr | 325 | |
1274 | hidnplayr | 326 | ; Calculate ACK number |
327 | mov edi, [edx + TCP_Packet.AckNumber] |
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328 | bswap edi |
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329 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.last_ack_number], edi |
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330 | DEBUGF 1,"Setting last_ack_number to %u\n", edi |
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331 | bswap edi |
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1159 | hidnplayr | 332 | |
1274 | hidnplayr | 333 | ; Dequeue all acknowledged packets |
334 | cmp [TCP_OUT_QUEUE], 0 ; first, check if any packets are queued at all |
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335 | je .no_ack |
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1254 | hidnplayr | 336 | |
337 | push ecx |
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338 | DEBUGF 1,"Removing all queued packets with smaller ACK\n" |
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1249 | hidnplayr | 339 | mov ecx, TCP_QUEUE_SIZE |
340 | mov esi, TCP_OUT_QUEUE+4 |
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341 | .loop: |
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342 | cmp [esi + tcp_out_queue_entry.data_ptr], 0 |
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1254 | hidnplayr | 343 | je .maybe_next |
1274 | hidnplayr | 344 | |
345 | cmp [esi + tcp_out_queue_entry.socket], ebx |
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346 | jne .maybe_next |
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347 | |||
348 | cmp [esi + tcp_out_queue_entry.seq_num], edi |
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1249 | hidnplayr | 349 | jg .maybe_next |
1159 | hidnplayr | 350 | |
1254 | hidnplayr | 351 | DEBUGF 1,"Removing a queued packet\n" |
352 | |||
1249 | hidnplayr | 353 | push [esi + tcp_out_queue_entry.data_ptr] |
354 | mov [esi + tcp_out_queue_entry.data_ptr], 0 |
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355 | dec [TCP_OUT_QUEUE] |
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356 | call kernel_free |
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1159 | hidnplayr | 357 | |
1249 | hidnplayr | 358 | .maybe_next: |
359 | add esi, tcp_out_queue_entry.size |
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360 | loop .loop |
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1274 | hidnplayr | 361 | pop ecx |
1254 | hidnplayr | 362 | |
1274 | hidnplayr | 363 | |
364 | ; Now call the correct handler, depending on the socket state |
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365 | .no_ack: |
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1254 | hidnplayr | 366 | mov eax, [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state] |
367 | |||
1249 | hidnplayr | 368 | cmp eax, TCB_LISTEN |
1254 | hidnplayr | 369 | jb .dump |
1249 | hidnplayr | 370 | cmp eax, TCB_CLOSED |
1254 | hidnplayr | 371 | ja .dump |
1159 | hidnplayr | 372 | |
1254 | hidnplayr | 373 | dec eax |
1249 | hidnplayr | 374 | shl eax, 2 |
1254 | hidnplayr | 375 | add eax, stateHandler |
1159 | hidnplayr | 376 | |
1254 | hidnplayr | 377 | call dword[eax] |
1159 | hidnplayr | 378 | |
1249 | hidnplayr | 379 | .dump: |
380 | DEBUGF 1,"Dumping TCP packet\n" |
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1196 | hidnplayr | 381 | call kernel_free |
382 | add esp, 4 ; pop (balance stack) |
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1159 | hidnplayr | 383 | |
1249 | hidnplayr | 384 | ret |
1196 | hidnplayr | 385 | |
386 | |||
387 | |||
388 | ;----------------------------------------------------------------- |
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389 | ; |
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1274 | hidnplayr | 390 | ; TCP_send (Assumes socket mutex set) |
1196 | hidnplayr | 391 | ; |
1249 | hidnplayr | 392 | ; IN: eax = socket pointer |
1274 | hidnplayr | 393 | ; bl = flags |
394 | ; ecx = number of bytes to send, may be set to 0 |
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395 | ; esi = pointer to data |
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1249 | hidnplayr | 396 | ; |
1196 | hidnplayr | 397 | ;----------------------------------------------------------------- |
1249 | hidnplayr | 398 | align 4 |
1274 | hidnplayr | 399 | TCP_send: |
1196 | hidnplayr | 400 | |
1274 | hidnplayr | 401 | DEBUGF 1,"Creating TCP packet, socket: %x, flags: %x\n",eax, bl |
1159 | hidnplayr | 402 | |
1249 | hidnplayr | 403 | mov di , IP_PROTO_TCP |
1274 | hidnplayr | 404 | add ecx, TCP_Packet.Data |
1159 | hidnplayr | 405 | |
1274 | hidnplayr | 406 | push bx eax esi |
1249 | hidnplayr | 407 | ; Create an IPv4 Packet of the correct size |
408 | mov ebx, [eax + SOCKET_head.end + IPv4_SOCKET.LocalIP] |
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409 | mov eax, [eax + SOCKET_head.end + IPv4_SOCKET.RemoteIP] |
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1159 | hidnplayr | 410 | |
1249 | hidnplayr | 411 | call IPv4_create_packet |
412 | cmp edi, -1 |
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413 | je .fail |
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1159 | hidnplayr | 414 | |
1274 | hidnplayr | 415 | ; If there is any data, copy it first |
1249 | hidnplayr | 416 | pop esi |
1274 | hidnplayr | 417 | push edi |
418 | add edi, TCP_Packet.Data |
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419 | sub ecx, TCP_Packet.Data |
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1159 | hidnplayr | 420 | |
1249 | hidnplayr | 421 | shr ecx, 1 |
422 | jnc .nb |
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423 | movsb |
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424 | .nb: shr ecx, 1 |
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425 | jnc .nw |
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426 | movsw |
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1274 | hidnplayr | 427 | .nw: test ecx, ecx |
428 | jz .nd |
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429 | rep movsd |
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430 | .nd: |
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431 | pop edi |
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1159 | hidnplayr | 432 | |
1249 | hidnplayr | 433 | ; Fill in the TCP header |
434 | pop esi |
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1159 | hidnplayr | 435 | |
1274 | hidnplayr | 436 | ; fill in tcp sequence number |
1249 | hidnplayr | 437 | push [esi + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.SND_NXT] |
438 | pop [edi + TCP_Packet.SequenceNumber] |
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1274 | hidnplayr | 439 | inc_INET (ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.SND_NXT) ;;;;;;;; |
1159 | hidnplayr | 440 | |
1274 | hidnplayr | 441 | ; Fill in local and remote ports |
442 | push dword [esi + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.LocalPort] |
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1249 | hidnplayr | 443 | pop dword [edi + TCP_Packet.SourcePort] |
1159 | hidnplayr | 444 | |
1274 | hidnplayr | 445 | ; Acknumber |
1254 | hidnplayr | 446 | push [esi + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RCV_NXT] |
1249 | hidnplayr | 447 | pop [edi + TCP_Packet.AckNumber] |
1159 | hidnplayr | 448 | |
1274 | hidnplayr | 449 | ; Fill in other tcp options |
1249 | hidnplayr | 450 | pop cx |
451 | mov [edi + TCP_Packet.Flags], cl |
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452 | mov [edi + TCP_Packet.Window], 0x0005 ; 1280 bytes |
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453 | mov [edi + TCP_Packet.UrgentPointer], 0 |
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454 | mov [edi + TCP_Packet.DataOffset], 0x50 |
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1254 | hidnplayr | 455 | mov [edi + TCP_Packet.Checksum], 0 |
1159 | hidnplayr | 456 | |
1274 | hidnplayr | 457 | ; Push pointer to and size of total packet (needed for send procedure) |
1254 | hidnplayr | 458 | push edx eax |
1159 | hidnplayr | 459 | |
1274 | hidnplayr | 460 | ; push socket number (for TCP_add_to_queue) |
461 | push esi |
||
1159 | hidnplayr | 462 | |
1274 | hidnplayr | 463 | ; Now, calculate the checksum ; TODO: calculate correct checksum for packets with data |
464 | pushw TCP_Packet.Data shl 8 |
||
1254 | hidnplayr | 465 | pushw IP_PROTO_TCP shl 8 |
1257 | hidnplayr | 466 | pushd [edi-4] ; destination address ; TODO: fix this, IPv4 packet could have options.. |
1254 | hidnplayr | 467 | pushd [edi-8] ; source address |
468 | |||
1249 | hidnplayr | 469 | xor edx, edx |
1274 | hidnplayr | 470 | mov ecx, TCP_Packet.Data |
1254 | hidnplayr | 471 | mov esi, edi |
472 | call checksum_1 |
||
1249 | hidnplayr | 473 | mov ecx, 12 |
474 | mov esi, esp |
||
475 | call checksum_1 |
||
476 | add esp, 12 ; remove the pseudoheader from stack |
||
1254 | hidnplayr | 477 | ; and store it in TCP header |
1249 | hidnplayr | 478 | call checksum_2 |
479 | mov [edi + TCP_Packet.Checksum], dx |
||
1159 | hidnplayr | 480 | |
1274 | hidnplayr | 481 | ; At last send the packet! |
1249 | hidnplayr | 482 | DEBUGF 1,"Sending TCP Packet to device %x\n", ebx |
1274 | hidnplayr | 483 | mov edx, [edi + TCP_Packet.SequenceNumber] |
484 | bswap edx |
||
1254 | hidnplayr | 485 | mov esi, [ebx + ETH_DEVICE.transmit] |
1274 | hidnplayr | 486 | pop edi |
487 | jmp TCP_queue |
||
1159 | hidnplayr | 488 | |
1249 | hidnplayr | 489 | .fail: |
1254 | hidnplayr | 490 | add esp, 2+4 |
1274 | hidnplayr | 491 | or eax, -1 |
1249 | hidnplayr | 492 | ret |
1159 | hidnplayr | 493 | |
494 | |||
1274 | hidnplayr | 495 | ;----------------------------------------------------------------- |
496 | ; |
||
497 | ; Queue a TCP packet for sending |
||
498 | ; |
||
499 | ; IN: [esp] pointer to buffer |
||
500 | ; [esp + 4] size of buffer |
||
501 | ; ebx = driver struct |
||
502 | ; esi = sender proc |
||
503 | ; edx = sequence number of this packet in normal byte order |
||
504 | ; edi = socket number |
||
505 | ; OUT: / |
||
506 | ; |
||
507 | ;----------------------------------------------------------------- |
||
508 | align 4 |
||
509 | TCP_queue: |
||
1159 | hidnplayr | 510 | |
1274 | hidnplayr | 511 | bswap edx |
512 | DEBUGF 1,"Adding packet to TCP queue, buffer: %x, size: %u, driver: %x, acknum: %u\n", [esp], [esp+4], ebx, edx |
||
513 | bswap edx |
||
1159 | hidnplayr | 514 | |
1274 | hidnplayr | 515 | cmp [TCP_OUT_QUEUE], TCP_QUEUE_SIZE |
516 | jge .full |
||
1159 | hidnplayr | 517 | |
1274 | hidnplayr | 518 | mov ecx, TCP_QUEUE_SIZE |
519 | mov eax, TCP_OUT_QUEUE+4 |
||
520 | |||
521 | .loop: |
||
522 | cmp [eax + tcp_out_queue_entry.data_ptr], 0 |
||
523 | je .found_it |
||
524 | add eax, tcp_out_queue_entry.size |
||
525 | loop .loop |
||
526 | |||
527 | .full: ; silently discard the packet |
||
528 | DEBUGF 1,"TCP queue is full!\n" |
||
529 | |||
530 | call kernel_free |
||
531 | add esp, 4 |
||
532 | |||
533 | ret |
||
534 | |||
535 | .found_it: ; eax points to empty queue entry |
||
536 | |||
537 | pop [eax + tcp_out_queue_entry.data_ptr] |
||
538 | pop [eax + tcp_out_queue_entry.data_size] |
||
539 | mov [eax + tcp_out_queue_entry.ttl], 1 ; send immediately |
||
540 | mov [eax + tcp_out_queue_entry.retries], TCP_RETRIES |
||
541 | mov [eax + tcp_out_queue_entry.owner], ebx |
||
542 | mov [eax + tcp_out_queue_entry.sendproc], esi |
||
543 | mov [eax + tcp_out_queue_entry.seq_num], edx |
||
544 | mov [eax + tcp_out_queue_entry.socket], edi |
||
545 | |||
546 | inc [TCP_OUT_QUEUE] |
||
547 | |||
548 | sub eax, TCP_OUT_QUEUE+4 |
||
549 | DEBUGF 1,"Added to queue in pos %u\n", eax |
||
550 | |||
551 | ret |
||
552 | |||
553 | |||
554 | |||
555 | |||
556 | |||
1255 | hidnplayr | 557 | ;---------- TCB state handlers start here |
558 | |||
559 | |||
560 | |||
561 | |||
1249 | hidnplayr | 562 | align 4 |
563 | stateTCB_LISTEN: |
||
1254 | hidnplayr | 564 | |
565 | DEBUGF 1,"TCBStateHandler: Listen\n" |
||
566 | |||
1274 | hidnplayr | 567 | test [edx + TCP_Packet.Flags], TH_SYN ; SYN packet? => send syn+ack, open new socket and set connection to established |
1159 | hidnplayr | 568 | jz .exit |
1274 | hidnplayr | 569 | ; Exit if backlog queue is full |
1256 | clevermous | 570 | mov ax, [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.backlog_cur] |
571 | cmp ax, [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.backlog] |
||
572 | jae .exit |
||
1274 | hidnplayr | 573 | ; Allocate new socket |
574 | push esi edi |
||
1256 | clevermous | 575 | call net_socket_alloc |
576 | test eax, eax |
||
1274 | hidnplayr | 577 | jz .fail |
578 | ; Copy structure from current socket to new, including lock |
||
579 | lea esi, [ebx + SOCKET_head.PID] ; yes, PID must also be copied |
||
1256 | clevermous | 580 | lea edi, [eax + SOCKET_head.PID] |
581 | mov ecx, ((SOCKET_head.end - SOCKET_head.PID) + IPv4_SOCKET.end + TCP_SOCKET.end + 3)/4 |
||
582 | rep movsd |
||
583 | pop edi esi |
||
1274 | hidnplayr | 584 | ; Push pointer to new socket to queue |
1256 | clevermous | 585 | movzx ecx, [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.backlog_cur] |
586 | inc [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.backlog_cur] |
||
587 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.end + ecx*4], eax |
||
1159 | hidnplayr | 588 | |
1256 | clevermous | 589 | mov [eax + SOCKET_head.end + IPv4_SOCKET.RemoteIP], esi ; IP source address |
590 | mov cx, [edx + TCP_Packet.SourcePort] |
||
591 | mov [eax + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RemotePort], cx |
||
592 | mov ecx, [edx + TCP_Packet.SequenceNumber] |
||
593 | mov [eax + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.IRS], ecx |
||
594 | mov [eax + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RCV_NXT], ecx |
||
595 | lea esi, [eax + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RCV_NXT] |
||
1249 | hidnplayr | 596 | inc_INET esi ; RCV.NXT |
1256 | clevermous | 597 | mov ecx, [eax + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.ISS] |
598 | mov [eax + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.SND_NXT], ecx |
||
1159 | hidnplayr | 599 | |
1254 | hidnplayr | 600 | mov [ebx + SOCKET_head.lock], 0 |
601 | |||
1256 | clevermous | 602 | push eax |
1274 | hidnplayr | 603 | ; Now construct the response |
1159 | hidnplayr | 604 | mov bl, TH_SYN + TH_ACK |
1274 | hidnplayr | 605 | xor ecx, ecx |
606 | call TCP_send |
||
1256 | clevermous | 607 | pop eax |
1159 | hidnplayr | 608 | |
1274 | hidnplayr | 609 | mov [eax + SOCKET_head.lock], 0 |
1256 | clevermous | 610 | mov [eax + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_SYN_RECEIVED |
611 | call notify_network_event |
||
612 | ret |
||
1159 | hidnplayr | 613 | |
614 | .exit: |
||
1254 | hidnplayr | 615 | mov [ebx + SOCKET_head.lock], 0 |
1159 | hidnplayr | 616 | ret |
617 | |||
1274 | hidnplayr | 618 | .fail: |
619 | add esp, 8 |
||
620 | mov [ebx + SOCKET_head.lock], 0 |
||
621 | ret |
||
1159 | hidnplayr | 622 | |
1274 | hidnplayr | 623 | |
1249 | hidnplayr | 624 | align 4 |
625 | stateTCB_SYN_SENT: |
||
1254 | hidnplayr | 626 | |
627 | DEBUGF 1,"TCBStateHandler: Syn_Sent\n" |
||
628 | |||
1159 | hidnplayr | 629 | ; We are awaiting an ACK to our SYN, with a SYM |
630 | ; Look at control flags - expecting an ACK |
||
631 | |||
1249 | hidnplayr | 632 | mov al, [edx + TCP_Packet.Flags] |
1274 | hidnplayr | 633 | |
634 | test al, TH_RST |
||
635 | jnz .reset ; jump if RST bit set |
||
636 | |||
637 | push [edx + TCP_Packet.SequenceNumber] ;; |
||
638 | pop [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RCV_NXT] ;; |
||
639 | inc_INET (ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RCV_NXT) ;; |
||
640 | |||
641 | |||
642 | push [edx + TCP_Packet.AckNumber] ;;;;;; |
||
643 | pop [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.SND_NXT] ;;;;;; |
||
644 | |||
1159 | hidnplayr | 645 | and al, TH_SYN + TH_ACK |
1274 | hidnplayr | 646 | jz .exit ; jump if none of the following is set: RST, SYN, ACK |
1159 | hidnplayr | 647 | |
1274 | hidnplayr | 648 | test al, TH_ACK |
649 | jz .onlysyn ; jump if only SYN bit is set |
||
1159 | hidnplayr | 650 | |
1274 | hidnplayr | 651 | ; If we arrived here, SYN and ACK are set |
1159 | hidnplayr | 652 | |
1254 | hidnplayr | 653 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_ESTABLISHED |
1274 | hidnplayr | 654 | pushw TH_ACK |
1159 | hidnplayr | 655 | |
1274 | hidnplayr | 656 | .send: ; Send an ACK |
1254 | hidnplayr | 657 | mov eax, ebx |
1274 | hidnplayr | 658 | pop bx |
659 | push eax |
||
660 | xor ecx, ecx |
||
661 | call TCP_send |
||
1159 | hidnplayr | 662 | pop ebx |
663 | |||
664 | .exit: |
||
1254 | hidnplayr | 665 | mov [ebx + SOCKET_head.lock], 0 |
1159 | hidnplayr | 666 | ret |
667 | |||
1274 | hidnplayr | 668 | .reset: |
669 | ; TODO: .... |
||
1159 | hidnplayr | 670 | |
1274 | hidnplayr | 671 | ; remove all queued TCP packets for this connection ! |
1249 | hidnplayr | 672 | |
1274 | hidnplayr | 673 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_CLOSED |
674 | mov [ebx + SOCKET_head.lock], 0 |
||
675 | ret |
||
676 | |||
677 | .onlysyn: |
||
678 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_SYN_RECEIVED |
||
679 | pushw TH_SYN + TH_ACK |
||
680 | jmp .send |
||
681 | |||
682 | |||
683 | |||
1249 | hidnplayr | 684 | align 4 |
685 | stateTCB_SYN_RECEIVED: |
||
1254 | hidnplayr | 686 | |
687 | DEBUGF 1,"TCBStateHandler: Syn_received\n" |
||
688 | |||
1274 | hidnplayr | 689 | test [edx + TCP_Packet.Flags], TH_RST ; reset connection? => LISTEN |
1159 | hidnplayr | 690 | jz .check_ack |
691 | |||
1274 | hidnplayr | 692 | push [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.OrigRemotePort] |
693 | pop [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RemotePort] |
||
694 | push [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.OrigRemoteIP] |
||
695 | pop [ebx + SOCKET_head.end + IPv4_SOCKET.RemoteIP] |
||
1159 | hidnplayr | 696 | |
1254 | hidnplayr | 697 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_LISTEN |
1159 | hidnplayr | 698 | jmp .exit |
699 | |||
700 | .check_ack: |
||
1274 | hidnplayr | 701 | test [edx + TCP_Packet.Flags], TH_ACK ; ACK? => connection established! |
1159 | hidnplayr | 702 | jz .exit |
703 | |||
1254 | hidnplayr | 704 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_ESTABLISHED |
1256 | clevermous | 705 | mov eax, ebx |
706 | call notify_network_event |
||
1159 | hidnplayr | 707 | |
708 | .exit: |
||
1254 | hidnplayr | 709 | mov [ebx + SOCKET_head.lock], 0 |
1159 | hidnplayr | 710 | ret |
711 | |||
712 | |||
1249 | hidnplayr | 713 | |
714 | align 4 |
||
715 | stateTCB_ESTABLISHED: |
||
1254 | hidnplayr | 716 | |
717 | DEBUGF 1,"TCBStateHandler: Established\n" |
||
718 | |||
1255 | hidnplayr | 719 | mov eax, [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RCV_NXT] |
1274 | hidnplayr | 720 | bswap eax |
721 | DEBUGF 1,"RCV_NXT is set to:%u\n", eax |
||
722 | bswap eax |
||
1255 | hidnplayr | 723 | cmp eax, [edx + TCP_Packet.SequenceNumber] |
724 | jne .exit |
||
725 | |||
1274 | hidnplayr | 726 | ; Calculate next sequencenumber |
727 | test ecx, ecx |
||
728 | jnz @f |
||
729 | inc ecx |
||
730 | @@: |
||
731 | add_INET (ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RCV_NXT) |
||
1159 | hidnplayr | 732 | |
1249 | hidnplayr | 733 | test [edx + TCP_Packet.Flags], TH_FIN |
1274 | hidnplayr | 734 | jnz .fin |
1159 | hidnplayr | 735 | |
736 | .check_ack: |
||
1249 | hidnplayr | 737 | test [edx + TCP_Packet.Flags], TH_ACK |
1159 | hidnplayr | 738 | jz .exit |
739 | |||
1254 | hidnplayr | 740 | DEBUGF 1,"Received ACK\n" |
1274 | hidnplayr | 741 | ; First, look at the incoming window. If this is less than or equal to 1024, |
742 | ; Set the socket window timer to 1. This will stop an additional Packets being queued. |
||
743 | ; ** I may need to tweak this value, since I do not know how many Packets are already queued |
||
1255 | hidnplayr | 744 | push ecx |
1249 | hidnplayr | 745 | mov cx, [edx + TCP_Packet.Window] |
1159 | hidnplayr | 746 | xchg cl, ch |
747 | cmp cx, 1024 |
||
748 | ja @f |
||
1249 | hidnplayr | 749 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.wndsizeTimer], 1 |
1255 | hidnplayr | 750 | @@: |
751 | pop ecx |
||
1159 | hidnplayr | 752 | |
1274 | hidnplayr | 753 | ; Now, see if we received any data |
1255 | hidnplayr | 754 | test ecx, ecx |
1274 | hidnplayr | 755 | jz .ack |
1159 | hidnplayr | 756 | |
1274 | hidnplayr | 757 | DEBUGF 1,"Got %u bytes data!\n", ecx |
758 | ; calculate header length |
||
759 | movzx eax, [edx + TCP_Packet.DataOffset] |
||
760 | and eax, 11110000b |
||
761 | shr eax, 2 |
||
762 | DEBUGF 1,"TCP header size: %u\n", eax |
||
763 | add edx, eax |
||
764 | add esp, 4 |
||
765 | pop esi |
||
766 | add esp, 4 |
||
1249 | hidnplayr | 767 | sub edx, esi |
768 | mov edi, edx |
||
1255 | hidnplayr | 769 | mov eax, ebx |
1274 | hidnplayr | 770 | jmp socket_internal_receiver ; Place the data from packet into socket |
1159 | hidnplayr | 771 | |
772 | .ack: |
||
1254 | hidnplayr | 773 | mov eax, ebx |
1159 | hidnplayr | 774 | mov bl, TH_ACK |
1274 | hidnplayr | 775 | push eax |
776 | xor ecx, ecx |
||
777 | call TCP_send ; send the ack |
||
778 | pop ebx |
||
1159 | hidnplayr | 779 | .exit: |
1254 | hidnplayr | 780 | mov [ebx + SOCKET_head.lock], 0 |
1159 | hidnplayr | 781 | ret |
782 | |||
1274 | hidnplayr | 783 | .fin: |
784 | ; Remove all resend entries from the queue |
||
785 | mov ecx, TCP_QUEUE_SIZE |
||
786 | mov esi, TCP_OUT_QUEUE+4 |
||
1159 | hidnplayr | 787 | |
1274 | hidnplayr | 788 | .removeloop: |
789 | cmp [esi + tcp_out_queue_entry.data_ptr], 0 |
||
790 | je .maybe_next |
||
1249 | hidnplayr | 791 | |
1274 | hidnplayr | 792 | ; TODO: check if the packets belong to the same tcp connection ! |
793 | |||
794 | DEBUGF 1,"Removing a queued packet\n" |
||
795 | |||
796 | push [esi + tcp_out_queue_entry.data_ptr] |
||
797 | mov [esi + tcp_out_queue_entry.data_ptr], 0 |
||
798 | dec [TCP_OUT_QUEUE] |
||
799 | call kernel_free |
||
800 | |||
801 | .maybe_next: |
||
802 | add esi, tcp_out_queue_entry.size |
||
803 | loop .removeloop |
||
804 | |||
805 | ; Send an ACK to that fin, and enter closewait state |
||
806 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_CLOSE_WAIT |
||
807 | jmp .check_ack |
||
808 | |||
809 | |||
810 | |||
1249 | hidnplayr | 811 | align 4 |
812 | stateTCB_FIN_WAIT_1: |
||
1254 | hidnplayr | 813 | |
814 | DEBUGF 1,"TCBStateHandler: Fin_wait_1\n" |
||
815 | |||
1159 | hidnplayr | 816 | ; We can either receive an ACK of a fin, or a fin |
1249 | hidnplayr | 817 | mov al, [edx + TCP_Packet.Flags] |
1159 | hidnplayr | 818 | and al, TH_FIN + TH_ACK |
819 | |||
820 | cmp al, TH_ACK |
||
821 | jne @f |
||
822 | |||
823 | ; It was an ACK |
||
1254 | hidnplayr | 824 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_FIN_WAIT_2 |
1159 | hidnplayr | 825 | jmp .exit |
826 | |||
1254 | hidnplayr | 827 | @@: mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_CLOSING |
1159 | hidnplayr | 828 | cmp al, TH_FIN |
829 | je @f |
||
1254 | hidnplayr | 830 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_TIMED_WAIT |
1159 | hidnplayr | 831 | |
1274 | hidnplayr | 832 | @@: |
1254 | hidnplayr | 833 | |
1274 | hidnplayr | 834 | ; lea esi, [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RCV_NXT] |
835 | ; inc_INET esi |
||
836 | |||
1159 | hidnplayr | 837 | ; Send an ACK |
1254 | hidnplayr | 838 | mov eax, ebx |
1159 | hidnplayr | 839 | mov bl, TH_ACK |
1274 | hidnplayr | 840 | push eax |
841 | xor ecx, ecx |
||
842 | call TCP_send |
||
843 | pop ebx |
||
1159 | hidnplayr | 844 | |
845 | .exit: |
||
1254 | hidnplayr | 846 | mov [ebx + SOCKET_head.lock], 0 |
1159 | hidnplayr | 847 | ret |
848 | |||
849 | |||
1249 | hidnplayr | 850 | |
851 | align 4 |
||
852 | stateTCB_FIN_WAIT_2: |
||
1254 | hidnplayr | 853 | |
854 | DEBUGF 1,"TCBStateHandler: Fin_wait_2\n" |
||
855 | |||
1249 | hidnplayr | 856 | test [edx + TCP_Packet.Flags], TH_FIN |
1159 | hidnplayr | 857 | jz .exit |
858 | |||
859 | ; Change state, as we have a fin |
||
1254 | hidnplayr | 860 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_TIMED_WAIT |
1159 | hidnplayr | 861 | |
1249 | hidnplayr | 862 | lea esi, [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.RCV_NXT] |
863 | inc_INET esi |
||
1159 | hidnplayr | 864 | |
1254 | hidnplayr | 865 | mov [ebx + SOCKET_head.lock], 0 |
866 | |||
1159 | hidnplayr | 867 | ; Send an ACK |
1254 | hidnplayr | 868 | mov eax, ebx |
1159 | hidnplayr | 869 | mov bl, TH_ACK |
1274 | hidnplayr | 870 | push eax |
871 | xor ecx, ecx |
||
872 | call TCP_send |
||
873 | pop ebx |
||
1159 | hidnplayr | 874 | |
875 | .exit: |
||
1254 | hidnplayr | 876 | mov [ebx + SOCKET_head.lock], 0 |
1159 | hidnplayr | 877 | ret |
878 | |||
879 | |||
1249 | hidnplayr | 880 | |
881 | align 4 |
||
882 | stateTCB_CLOSE_WAIT: |
||
1254 | hidnplayr | 883 | |
884 | DEBUGF 1,"TCBStateHandler: close_wait\n" |
||
1159 | hidnplayr | 885 | ; Intentionally left empty |
886 | ; socket_close_tcp handles this |
||
1254 | hidnplayr | 887 | |
888 | mov [ebx + SOCKET_head.lock], 0 |
||
1159 | hidnplayr | 889 | ret |
890 | |||
891 | |||
1249 | hidnplayr | 892 | |
893 | align 4 |
||
894 | stateTCB_CLOSING: |
||
1254 | hidnplayr | 895 | |
896 | DEBUGF 1,"TCBStateHandler: closingn\n" |
||
897 | |||
1159 | hidnplayr | 898 | ; We can either receive an ACK of a fin, or a fin |
1249 | hidnplayr | 899 | test [edx + TCP_Packet.Flags], TH_ACK |
1159 | hidnplayr | 900 | jz .exit |
901 | |||
1254 | hidnplayr | 902 | mov [ebx + SOCKET_head.end + IPv4_SOCKET.end + TCP_SOCKET.state], TCB_TIMED_WAIT |
1159 | hidnplayr | 903 | |
904 | .exit: |
||
1254 | hidnplayr | 905 | |
906 | mov [ebx + SOCKET_head.lock], 0 |
||
1159 | hidnplayr | 907 | ret |
908 | |||
909 | |||
1249 | hidnplayr | 910 | align 4 |
911 | stateTCB_LAST_ACK: |
||
1254 | hidnplayr | 912 | |
913 | DEBUGF 1,"TCBStateHandler: last_ackn\n" |
||
914 | |||
1159 | hidnplayr | 915 | ; Look at control flags - expecting an ACK |
1249 | hidnplayr | 916 | test [edx + TCP_Packet.Flags], TH_ACK |
1159 | hidnplayr | 917 | jz .exit |
918 | |||
1254 | hidnplayr | 919 | mov [ebx + SOCKET_head.lock], 0 |
920 | |||
1159 | hidnplayr | 921 | ; delete the socket |
922 | stdcall net_socket_free, ebx |
||
923 | |||
924 | .exit: |
||
925 | ret |
||
926 | |||
927 | |||
1249 | hidnplayr | 928 | align 4 |
929 | stateTCB_TIME_WAIT: |
||
1254 | hidnplayr | 930 | |
931 | DEBUGF 1,"TCBStateHandler: time_wait\n" |
||
932 | |||
933 | mov [ebx + SOCKET_head.lock], 0 |
||
934 | |||
1159 | hidnplayr | 935 | ret |
936 | |||
937 | |||
1249 | hidnplayr | 938 | align 4 |
939 | stateTCB_CLOSED: |
||
1254 | hidnplayr | 940 | |
941 | DEBUGF 1,"TCBStateHandler: closed\n" |
||
942 | |||
943 | mov [ebx + SOCKET_head.lock], 0 |
||
944 | |||
1159 | hidnplayr | 945 | ret |
946 | |||
947 | |||
948 | |||
1254 | hidnplayr | 949 | ;--------------------------------------------------------------------------- |
950 | ; |
||
951 | ; TCP_API |
||
952 | ; |
||
953 | ; This function is called by system function 75 |
||
954 | ; |
||
955 | ; IN: subfunction number in bl |
||
956 | ; device number in bh |
||
957 | ; ecx, edx, .. depends on subfunction |
||
958 | ; |
||
959 | ; OUT: |
||
960 | ; |
||
961 | ;--------------------------------------------------------------------------- |
||
962 | align 4 |
||
963 | TCP_API: |
||
964 | |||
965 | movzx eax, bh |
||
966 | shl eax, 2 |
||
967 | |||
968 | test bl, bl |
||
969 | jz .packets_tx ; 0 |
||
970 | dec bl |
||
971 | jz .packets_rx ; 1 |
||
972 | |||
973 | .error: |
||
974 | mov eax, -1 |
||
975 | ret |
||
976 | |||
977 | .packets_tx: |
||
978 | add eax, TCP_PACKETS_TX |
||
979 | mov eax, [eax] |
||
980 | ret |
||
981 | |||
982 | .packets_rx: |
||
983 | add eax, TCP_PACKETS_RX |
||
984 | mov eax, [eax] |
||
985 | ret |