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Rev | Author | Line No. | Line |
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3555 | Serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2013. 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 | ;; Part of the TCP/IP network stack for KolibriOS ;; |
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7 | ;; ;; |
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8 | ;; Written by hidnplayr@kolibrios.org ;; |
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9 | ;; ;; |
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10 | ;; Based on the code of 4.4BSD ;; |
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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 | |||
17 | $Revision: 3289 $ |
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18 | |||
19 | ;----------------------------------------------------------------- |
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20 | ; |
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21 | ; TCP_output |
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22 | ; |
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23 | ; IN: eax = socket pointer |
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24 | ; |
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25 | ; OUT: / |
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26 | ; |
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27 | ;----------------------------------------------------------------- |
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28 | align 4 |
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29 | TCP_output: |
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30 | |||
3589 | Serge | 31 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: socket=%x\n", eax |
3555 | Serge | 32 | |
33 | push eax |
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34 | lea ecx, [eax + SOCKET.mutex] |
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35 | call mutex_lock |
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36 | pop eax |
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37 | |||
3725 | Serge | 38 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: socket locked\n" |
39 | |||
3555 | Serge | 40 | ; We'll detect the length of the data to be transmitted, and flags to be used |
41 | ; If there is some data, or any critical controls to send (SYN / RST), then transmit |
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42 | ; Otherwise, investigate further |
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43 | |||
44 | mov ebx, [eax + TCP_SOCKET.SND_MAX] |
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45 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
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46 | jbe .not_idle |
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47 | |||
48 | mov ebx, [eax + TCP_SOCKET.t_idle] |
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49 | cmp ebx, [eax + TCP_SOCKET.t_rxtcur] |
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50 | jbe .not_idle |
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51 | |||
52 | ; We have been idle for a while and no ACKS are expected to clock out any data we send.. |
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53 | ; Slow start to get ack "clock" running again. |
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54 | |||
55 | mov ebx, [eax + TCP_SOCKET.t_maxseg] |
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56 | mov [eax + TCP_SOCKET.SND_CWND], ebx |
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57 | |||
58 | .not_idle: |
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59 | .again: |
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60 | mov [eax + TCP_SOCKET.temp_bits], 0 |
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61 | |||
62 | mov ebx, [eax + TCP_SOCKET.SND_NXT] ; calculate offset (71) |
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63 | sub ebx, [eax + TCP_SOCKET.SND_UNA] ; |
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64 | |||
65 | mov ecx, [eax + TCP_SOCKET.SND_WND] ; determine window |
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66 | cmp ecx, [eax + TCP_SOCKET.SND_CWND] ; |
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67 | jb @f ; |
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68 | mov ecx, [eax + TCP_SOCKET.SND_CWND] ; |
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69 | @@: ; |
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70 | |||
71 | call TCP_outflags ; flags in dl |
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72 | |||
73 | ;------------------------ |
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74 | ; data being forced out ? |
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75 | |||
76 | ; If in persist timeout with window of 0, send 1 byte. |
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77 | ; Otherwise, if window is small but nonzero, and timer expired, |
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78 | ; we will send what we can and go to transmit state |
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79 | |||
80 | cmp [eax + TCP_SOCKET.t_force], 0 |
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81 | je .no_force |
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82 | |||
3589 | Serge | 83 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: forcing data out\n" |
3555 | Serge | 84 | |
85 | test ecx, ecx |
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86 | jnz .no_zero_window |
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87 | |||
88 | cmp ebx, [eax + STREAM_SOCKET.snd.size] |
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89 | jae @f |
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90 | |||
91 | and dl, not (TH_FIN) |
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92 | |||
93 | @@: |
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94 | inc ecx |
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95 | jmp .no_force |
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96 | |||
97 | .no_zero_window: |
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3626 | Serge | 98 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_persist |
3555 | Serge | 99 | mov [eax + TCP_SOCKET.t_rxtshift], 0 |
100 | |||
101 | .no_force: |
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102 | |||
103 | ;-------------------------------- |
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104 | ; Calculate how much data to send (106) |
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105 | |||
106 | mov esi, [eax + STREAM_SOCKET.snd.size] |
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107 | cmp esi, ecx |
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108 | jb @f |
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109 | mov esi, ecx |
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110 | @@: |
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111 | sub esi, ebx |
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112 | |||
113 | |||
114 | ;------------------------ |
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115 | ; check for window shrink (107) |
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116 | |||
117 | ; If FIN has been set, but not ACKed, but we havent been called to retransmit, esi will be -1 |
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118 | ; Otherwise, window shrank after we sent into it. |
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119 | |||
120 | jae .not_persist |
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121 | |||
122 | ; enter persist state |
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123 | xor esi, esi |
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124 | |||
125 | ; If window shrank to 0 |
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126 | test ecx, ecx |
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127 | jnz @f |
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128 | |||
129 | ; cancel pending retransmit |
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3626 | Serge | 130 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_retransmission |
3555 | Serge | 131 | |
132 | ; pull SND_NXT back to (closed) window, We will enter persist state below. |
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133 | push [eax + TCP_SOCKET.SND_UNA] |
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134 | pop [eax + TCP_SOCKET.SND_NXT] |
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135 | @@: |
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136 | |||
137 | ; If window didn't close completely, just wait for an ACK |
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138 | |||
139 | .not_persist: |
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140 | |||
141 | ;--------------------------- |
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142 | ; Send one segment at a time (124) |
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143 | |||
144 | cmp esi, [eax + TCP_SOCKET.t_maxseg] |
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145 | jbe @f |
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146 | |||
147 | mov esi, [eax + TCP_SOCKET.t_maxseg] |
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148 | or [eax + TCP_SOCKET.temp_bits], TCP_BIT_SENDALOT |
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149 | @@: |
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150 | |||
151 | ;-------------------------------------------- |
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152 | ; Turn of FIN flag if send buffer not emptied (128) |
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153 | |||
154 | mov edi, [eax + TCP_SOCKET.SND_NXT] |
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155 | add edi, esi |
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156 | sub edi, [eax + TCP_SOCKET.SND_UNA] |
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157 | cmp edi, [eax + STREAM_SOCKET.snd.size] |
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158 | jae @f |
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159 | and dl, not (TH_FIN) |
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160 | |||
161 | @@: |
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162 | |||
163 | ;------------------------------- |
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164 | ; calculate window advertisement (130) |
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165 | |||
166 | mov ecx, SOCKET_MAXDATA |
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167 | sub ecx, [eax + STREAM_SOCKET.rcv.size] |
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168 | |||
169 | ;------------------------------ |
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170 | ; Sender silly window avoidance (131) |
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171 | |||
172 | test esi, esi |
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173 | jz .len_zero |
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174 | |||
175 | cmp esi, [eax + TCP_SOCKET.t_maxseg] |
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176 | je TCP_send |
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177 | |||
178 | add ebx, esi ; offset + length |
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179 | cmp ebx, [eax + STREAM_SOCKET.snd.size] |
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180 | jb @f |
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181 | |||
182 | test [eax + TCP_SOCKET.t_flags], TF_NODELAY |
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183 | jnz TCP_send |
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184 | |||
185 | mov ebx, [eax + TCP_SOCKET.SND_MAX] |
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186 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
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187 | je TCP_send |
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188 | @@: |
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189 | |||
190 | test [eax + TCP_SOCKET.t_force], -1 ;;; |
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191 | jnz TCP_send |
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192 | |||
193 | mov ebx, [eax + TCP_SOCKET.max_sndwnd] |
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194 | shr ebx, 1 |
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195 | cmp esi, ebx |
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196 | jae TCP_send |
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197 | |||
198 | mov ebx, [eax + TCP_SOCKET.SND_NXT] |
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199 | cmp ebx, [eax + TCP_SOCKET.SND_MAX] |
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200 | jb TCP_send |
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201 | |||
202 | .len_zero: |
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203 | |||
204 | ;---------------------------------------- |
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205 | ; Check if a window update should be sent (154) |
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206 | |||
3589 | Serge | 207 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: window=%d\n", ecx |
3555 | Serge | 208 | |
209 | ; Compare available window to amount of window known to peer (as advertised window less next expected input) |
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210 | ; If the difference is at least two max size segments, or at least 50% of the maximum possible window, |
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211 | ; Then we want to send a window update to the peer. |
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212 | |||
213 | test ecx, ecx |
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214 | jz .no_window |
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215 | |||
216 | push ecx |
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217 | mov cl, [eax + TCP_SOCKET.RCV_SCALE] |
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218 | mov ebx, TCP_max_win |
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219 | shl ebx, cl |
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220 | pop ecx |
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3725 | Serge | 221 | |
3555 | Serge | 222 | cmp ebx, ecx |
223 | jb @f |
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224 | mov ebx, ecx |
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225 | @@: |
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226 | sub ebx, [eax + TCP_SOCKET.RCV_ADV] |
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227 | add ebx, [eax + TCP_SOCKET.RCV_NXT] |
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228 | |||
229 | mov edi, [eax + TCP_SOCKET.t_maxseg] |
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230 | shl edi, 1 |
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231 | |||
232 | ; cmp ebx, edi |
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233 | ; jae TCP_send |
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234 | |||
235 | ; cmp ebx, [eax + TCP_SOCKET.] ;;; TODO: check with receive buffer high water mark |
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236 | ; jae TCP_send |
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237 | |||
238 | .no_window: |
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239 | |||
240 | ;-------------------------- |
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241 | ; Should a segment be sent? (174) |
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242 | |||
3589 | Serge | 243 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: 174\n" |
3555 | Serge | 244 | |
245 | test [eax + TCP_SOCKET.t_flags], TF_ACKNOW ; we need to ACK |
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246 | jnz TCP_send |
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247 | |||
248 | test dl, TH_SYN + TH_RST ; we need to send a SYN or RST |
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249 | jnz TCP_send |
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250 | |||
251 | mov ebx, [eax + TCP_SOCKET.SND_UP] ; when urgent pointer is beyond start of send bufer |
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252 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
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253 | ja TCP_send |
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254 | |||
255 | test dl, TH_FIN |
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256 | jz .enter_persist ; no reason to send, enter persist state |
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257 | |||
258 | ; FIN was set, only send if not already sent, or on retransmit |
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259 | |||
260 | test [eax + TCP_SOCKET.t_flags], TF_SENTFIN |
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261 | jz TCP_send |
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262 | |||
263 | mov ebx, [eax + TCP_SOCKET.SND_NXT] |
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264 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
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265 | je TCP_send |
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266 | |||
267 | ;-------------------- |
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268 | ; Enter persist state (191) |
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269 | |||
270 | .enter_persist: |
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271 | |||
3626 | Serge | 272 | cmp [eax + STREAM_SOCKET.snd.size], 0 ; Data ready to send? |
3555 | Serge | 273 | jne @f |
3626 | Serge | 274 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_retransmission |
3555 | Serge | 275 | jne @f |
276 | |||
3626 | Serge | 277 | test [eax + TCP_SOCKET.timer_flags], timer_flag_persist ; Persist timer already expired? |
278 | jnz @f |
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279 | |||
3589 | Serge | 280 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: Entering persist state\n" |
3555 | Serge | 281 | |
282 | mov [eax + TCP_SOCKET.t_rxtshift], 0 |
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283 | call TCP_set_persist |
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284 | @@: |
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285 | |||
286 | ;---------------------------- |
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287 | ; No reason to send a segment (219) |
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288 | |||
3589 | Serge | 289 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: No reason to send a segment\n" |
3555 | Serge | 290 | |
291 | pusha |
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292 | lea ecx, [eax + SOCKET.mutex] |
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293 | call mutex_unlock |
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294 | popa |
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295 | |||
296 | ; Fixme: returnvalue? |
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297 | |||
298 | ret |
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299 | |||
300 | |||
301 | |||
302 | |||
303 | |||
304 | |||
305 | |||
306 | |||
307 | |||
308 | ;----------------------------------------------- |
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309 | ; |
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310 | ; Send a segment (222) |
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311 | ; |
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312 | ; eax = socket pointer |
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313 | ; esi = data len |
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314 | ; dl = flags |
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315 | ; |
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316 | ;----------------------------------------------- |
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317 | align 4 |
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318 | TCP_send: |
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319 | |||
3589 | Serge | 320 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: socket=%x length=%u flags=%x\n", eax, esi, dl |
3555 | Serge | 321 | |
322 | push eax ; save socket ptr |
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323 | push esi ; and data length too |
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324 | mov edi, sizeof.TCP_header ; edi will contain headersize |
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325 | |||
326 | ;------------------------------------ |
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327 | ; Send options with first SYN segment |
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328 | |||
329 | test dl, TH_SYN |
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330 | jz .options_done |
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331 | |||
332 | push [eax + TCP_SOCKET.ISS] |
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333 | pop [eax + TCP_SOCKET.SND_NXT] |
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334 | |||
335 | test [eax + TCP_SOCKET.t_flags], TF_NOOPT |
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336 | jnz .options_done |
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337 | |||
338 | mov ecx, 1460 ;;;; FIXME: use routing blablabla to determine MSS |
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339 | or ecx, TCP_OPT_MAXSEG shl 24 + 4 shl 16 |
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340 | bswap ecx |
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341 | push ecx |
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342 | add di, 4 |
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343 | |||
3589 | Serge | 344 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: added maxseg option\n" |
3555 | Serge | 345 | |
346 | test [eax + TCP_SOCKET.t_flags], TF_REQ_SCALE |
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347 | jz .no_scale |
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348 | |||
349 | test dl, TH_ACK |
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350 | jz .scale_opt |
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351 | |||
352 | test [eax + TCP_SOCKET.t_flags], TF_RCVD_SCALE |
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353 | jz .no_scale |
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354 | |||
355 | .scale_opt: |
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356 | mov cl, [eax + TCP_SOCKET.request_r_scale] |
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357 | mov ch, TCP_OPT_NOP |
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358 | pushw cx |
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359 | pushw TCP_OPT_WINDOW + 3 shl 8 |
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360 | add di, 4 |
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361 | |||
3589 | Serge | 362 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: added scale option\n" |
3555 | Serge | 363 | |
364 | .no_scale: |
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365 | .no_syn: |
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366 | |||
367 | ;------------------------------------ |
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368 | ; Make the timestamp option if needed |
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369 | |||
370 | test [eax + TCP_SOCKET.t_flags], TF_REQ_TSTMP |
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371 | jz .no_timestamp |
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372 | |||
373 | test dl, TH_RST |
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374 | jnz .no_timestamp |
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375 | |||
376 | test dl, TH_ACK |
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377 | jz .timestamp |
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378 | |||
379 | test [eax + TCP_SOCKET.t_flags], TF_RCVD_TSTMP |
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380 | jz .no_timestamp |
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381 | |||
382 | .timestamp: |
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383 | pushd 0 |
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384 | pushd [timer_ticks] |
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385 | pushd TCP_OPT_NOP + TCP_OPT_NOP shl 8 + TCP_OPT_TIMESTAMP shl 16 + 10 shl 24 |
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386 | add di, 12 |
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387 | |||
3589 | Serge | 388 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: added timestamp\n" |
3555 | Serge | 389 | |
390 | .no_timestamp: |
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391 | |||
392 | ; |
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393 | |||
394 | .options_done: |
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395 | |||
396 | ; eax = socket ptr |
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397 | ; edx = flags |
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398 | ; edi = header size |
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399 | ; esi = data len |
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400 | |||
401 | ;--------------------------------------------- |
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402 | ; check if we dont exceed the max segment size (270) |
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403 | |||
404 | add esi, edi ; total TCP segment size |
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405 | cmp esi, [eax + TCP_SOCKET.t_maxseg] |
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406 | jbe .no_overflow |
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407 | |||
408 | mov esi, [eax + TCP_SOCKET.t_maxseg] |
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409 | or [eax + TCP_SOCKET.temp_bits], TCP_BIT_SENDALOT |
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410 | .no_overflow: |
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411 | |||
412 | ;----------------------------------------------------------------- |
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413 | ; Start by pushing all TCP header values in reverse order on stack |
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414 | ; (essentially, creating the tcp header on the stack!) |
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415 | |||
416 | pushw 0 ; .UrgentPointer dw ? |
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417 | pushw 0 ; .Checksum dw ? |
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418 | pushw 0x00a0 ; .Window dw ? ;;;;;;; FIXME (370) |
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419 | shl edi, 2 ; .DataOffset db ? only 4 left-most bits |
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420 | shl dx, 8 |
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421 | or dx, di ; .Flags db ? |
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422 | pushw dx |
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423 | shr edi, 2 ; .DataOffset db ? |
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424 | |||
425 | push [eax + TCP_SOCKET.RCV_NXT] ; .AckNumber dd ? |
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426 | ntohd [esp] |
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427 | |||
428 | push [eax + TCP_SOCKET.SND_NXT] ; .SequenceNumber dd ? |
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429 | ntohd [esp] |
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430 | |||
431 | push [eax + TCP_SOCKET.RemotePort] ; .DestinationPort dw ? |
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432 | push [eax + TCP_SOCKET.LocalPort] ; .SourcePort dw ? |
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433 | |||
434 | push edi ; header size |
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435 | |||
436 | ;--------------------- |
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437 | ; Create the IP packet |
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438 | |||
439 | mov ecx, esi |
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440 | mov edx, [eax + IP_SOCKET.LocalIP] ; source ip |
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441 | mov eax, [eax + IP_SOCKET.RemoteIP] ; dest ip |
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442 | mov di, IP_PROTO_TCP shl 8 + 128 |
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443 | call IPv4_output |
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444 | jz .ip_error |
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445 | |||
446 | ;----------------------------------------- |
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447 | ; Move TCP header from stack to TCP packet |
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448 | |||
449 | push ecx |
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450 | mov ecx, [esp + 4] |
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451 | lea esi, [esp + 8] |
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452 | shr ecx, 2 ; count is in bytes, we will work with dwords |
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3725 | Serge | 453 | rep movsd |
3555 | Serge | 454 | pop ecx ; full TCP packet size |
455 | |||
456 | pop esi ; headersize |
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457 | add esp, esi ; remove it from stack |
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458 | |||
459 | push edx ; packet size for send proc |
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460 | push eax ; packet ptr for send proc |
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461 | |||
462 | mov edx, edi ; begin of data |
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463 | sub edx, esi ; begin of packet (edi = begin of data) |
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464 | push ecx |
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465 | sub ecx, esi ; data size |
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466 | |||
467 | ;-------------- |
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468 | ; Copy the data |
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469 | |||
470 | ; eax = ptr to ring struct |
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471 | ; ecx = buffer size |
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472 | ; edi = ptr to buffer |
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473 | |||
474 | mov eax, [esp + 16] ; get socket ptr |
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475 | |||
476 | push edx |
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477 | push [eax + TCP_SOCKET.SND_NXT] ; we'll need this for timing the transmission |
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478 | test ecx, ecx |
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479 | jz .nodata |
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480 | mov edx, [eax + TCP_SOCKET.SND_NXT] |
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481 | add [eax + TCP_SOCKET.SND_NXT], ecx ; update sequence number <<< CHECKME |
||
482 | sub edx, [eax + TCP_SOCKET.SND_UNA] ; offset |
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483 | add eax, STREAM_SOCKET.snd |
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484 | call SOCKET_ring_read |
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485 | .nodata: |
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486 | pop edi |
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487 | pop esi ; begin of data |
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488 | pop ecx ; full packet size |
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489 | mov eax, [esp + 12] ; socket ptr |
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490 | |||
491 | ;---------------------------------- |
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492 | ; initialize retransmit timer (400) |
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493 | |||
494 | ;TODO: check t_force and persist |
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495 | |||
496 | test [esi + TCP_header.Flags], TH_SYN + TH_FIN ; syn and fin take a sequence number |
||
497 | jz @f |
||
498 | inc [eax + TCP_SOCKET.SND_NXT] |
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499 | test [esi + TCP_header.Flags], TH_FIN |
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500 | jz @f |
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501 | or [eax + TCP_SOCKET.t_flags], TF_SENTFIN ; if we sent a fin, set the sentfin flag |
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502 | @@: |
||
503 | |||
504 | mov edx, [eax + TCP_SOCKET.SND_NXT] |
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505 | cmp edx, [eax + TCP_SOCKET.SND_MAX] ; is this a retransmission? |
||
506 | jbe @f |
||
507 | mov [eax + TCP_SOCKET.SND_MAX], edx ; [eax + TCP_SOCKET.SND_NXT] from before we updated it |
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508 | |||
509 | cmp [eax + TCP_SOCKET.t_rtt], 0 ; are we currently timing anything? |
||
510 | je @f |
||
511 | mov [eax + TCP_SOCKET.t_rtt], 1 ; nope, start transmission timer |
||
512 | mov [eax + TCP_SOCKET.t_rtseq], edi |
||
513 | ;TODO: update stats |
||
514 | @@: |
||
515 | |||
516 | ; set retransmission timer if not already set, and not doing an ACK or keepalive probe |
||
3626 | Serge | 517 | test [eax + TCP_SOCKET.timer_flags], timer_flag_retransmission |
518 | jnz .retransmit_set |
||
3555 | Serge | 519 | |
520 | cmp edx, [eax + TCP_SOCKET.SND_UNA] ; edx is still [eax + TCP_SOCKET.SND_NXT] |
||
521 | je .retransmit_set |
||
522 | |||
523 | mov edx, [eax + TCP_SOCKET.t_rxtcur] |
||
524 | mov [eax + TCP_SOCKET.timer_retransmission], edx |
||
3626 | Serge | 525 | or [eax + TCP_SOCKET.timer_flags], timer_flag_retransmission |
3555 | Serge | 526 | |
3626 | Serge | 527 | test [eax + TCP_SOCKET.timer_flags], timer_flag_persist |
528 | jz .retransmit_set |
||
529 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_persist |
||
3555 | Serge | 530 | mov [eax + TCP_SOCKET.t_rxtshift], 0 |
531 | |||
532 | .retransmit_set: |
||
533 | |||
534 | ;-------------------- |
||
535 | ; Create the checksum |
||
536 | |||
537 | TCP_checksum (eax + IP_SOCKET.LocalIP), (eax + IP_SOCKET.RemoteIP) |
||
538 | mov [esi + TCP_header.Checksum], dx |
||
539 | |||
540 | ;---------------- |
||
541 | ; Send the packet |
||
542 | |||
3589 | Serge | 543 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: Sending with device %x\n", ebx |
3555 | Serge | 544 | call [ebx + NET_DEVICE.transmit] |
545 | jnz .send_error |
||
546 | |||
547 | ;--------------- |
||
548 | ; Ok, data sent! |
||
549 | |||
550 | pop ecx |
||
551 | pop eax |
||
552 | |||
3725 | Serge | 553 | call NET_ptr_to_num4 |
554 | inc [TCP_segments_tx + edi] |
||
3555 | Serge | 555 | |
556 | ; update advertised receive window |
||
557 | test ecx, ecx |
||
558 | jz @f |
||
559 | add ecx, [eax + TCP_SOCKET.RCV_NXT] |
||
560 | cmp ecx, [eax + TCP_SOCKET.RCV_ADV] |
||
561 | jbe @f |
||
562 | mov [eax + TCP_SOCKET.RCV_ADV], ecx |
||
563 | @@: |
||
564 | |||
565 | ; update last ack sent |
||
566 | push [eax + TCP_SOCKET.RCV_NXT] |
||
567 | pop [eax + TCP_SOCKET.last_ack_sent] |
||
568 | |||
569 | ; and flags |
||
570 | and [eax + TCP_SOCKET.t_flags], not (TF_ACKNOW + TF_DELACK) |
||
571 | |||
572 | ;-------------- |
||
573 | ; unlock socket |
||
574 | |||
3725 | Serge | 575 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: unlocking socket 0x%x\n", eax |
576 | |||
3555 | Serge | 577 | push eax |
578 | lea ecx, [eax + SOCKET.mutex] |
||
579 | call mutex_unlock |
||
580 | pop eax |
||
581 | |||
582 | ;----------------------------- |
||
583 | ; Check if we need more output |
||
584 | |||
585 | test [eax + TCP_SOCKET.temp_bits], TCP_BIT_SENDALOT |
||
586 | jnz TCP_output.again |
||
587 | |||
3589 | Serge | 588 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: success!\n" |
3555 | Serge | 589 | |
590 | xor eax, eax |
||
591 | ret |
||
592 | |||
593 | |||
594 | .ip_error: |
||
595 | pop ecx |
||
596 | add esp, ecx |
||
597 | add esp, 4 |
||
598 | pop eax |
||
599 | |||
600 | mov [eax + TCP_SOCKET.timer_retransmission], TCP_time_re_min |
||
3626 | Serge | 601 | or [eax + TCP_SOCKET.timer_flags], timer_flag_retransmission |
3555 | Serge | 602 | |
603 | lea ecx, [eax + SOCKET.mutex] |
||
604 | call mutex_unlock |
||
605 | |||
3626 | Serge | 606 | DEBUGF DEBUG_NETWORK_ERROR, "TCP_send: IP error\n" |
3555 | Serge | 607 | |
608 | or eax, -1 |
||
609 | ret |
||
610 | |||
611 | |||
612 | .send_error: |
||
3725 | Serge | 613 | add esp, 4 |
614 | pop eax |
||
3555 | Serge | 615 | |
616 | lea ecx, [eax + SOCKET.mutex] |
||
617 | call mutex_unlock |
||
618 | |||
3626 | Serge | 619 | DEBUGF DEBUG_NETWORK_ERROR, "TCP_send: sending failed\n" |
3555 | Serge | 620 | |
621 | or eax, -2 |
||
622 | ret><><<> |
||
623 |