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1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
2 | ;; ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2017. All rights reserved. ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
5 | ;; ;; |
6 | ;; Part of the TCP/IP network stack for KolibriOS ;; |
6 | ;; Part of the TCP/IP network stack for KolibriOS ;; |
7 | ;; ;; |
7 | ;; ;; |
8 | ;; Written by hidnplayr@kolibrios.org ;; |
8 | ;; Written by hidnplayr@kolibrios.org ;; |
9 | ;; ;; |
9 | ;; ;; |
10 | ;; Based on the code of 4.4BSD ;; |
10 | ;; Based on the code of 4.4BSD ;; |
11 | ;; ;; |
11 | ;; ;; |
12 | ;; GNU GENERAL PUBLIC LICENSE ;; |
12 | ;; GNU GENERAL PUBLIC LICENSE ;; |
13 | ;; Version 2, June 1991 ;; |
13 | ;; Version 2, June 1991 ;; |
14 | ;; ;; |
14 | ;; ;; |
15 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
15 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
16 | 16 | ||
17 | $Revision: 6476 $ |
17 | $Revision: 6909 $ |
18 | 18 | ||
19 | TCP_BIT_SENDALOT = 1 shl 0 |
19 | TCP_BIT_SENDALOT = 1 shl 0 |
20 | 20 | ||
21 | ;-----------------------------------------------------------------; |
21 | ;-----------------------------------------------------------------; |
22 | ; ; |
22 | ; ; |
23 | ; tcp_output ; |
23 | ; tcp_output ; |
24 | ; ; |
24 | ; ; |
25 | ; IN: eax = socket pointer ; |
25 | ; IN: eax = socket pointer ; |
26 | ; ; |
26 | ; ; |
27 | ; OUT: eax = 0 on success/errorcode ; |
27 | ; OUT: eax = 0 on success/errorcode ; |
28 | ; ; |
28 | ; ; |
29 | ;-----------------------------------------------------------------; |
29 | ;-----------------------------------------------------------------; |
30 | align 4 |
30 | align 4 |
31 | proc tcp_output |
31 | proc tcp_output |
32 | 32 | ||
33 | locals |
33 | locals |
34 | temp_bits db ? |
34 | temp_bits db ? |
35 | window dd ? |
35 | window dd ? |
36 | endl |
36 | endl |
37 | 37 | ||
38 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: socket=%x state=%u\n", eax, [eax + TCP_SOCKET.t_state] |
38 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: socket=%x state=%u\n", eax, [eax + TCP_SOCKET.t_state] |
39 | 39 | ||
40 | push eax |
40 | push eax |
41 | lea ecx, [eax + SOCKET.mutex] |
41 | lea ecx, [eax + SOCKET.mutex] |
42 | call mutex_lock |
42 | call mutex_lock |
43 | pop eax |
43 | pop eax |
44 | 44 | ||
45 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: socket locked\n" |
45 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: socket locked\n" |
46 | 46 | ||
47 | ; We'll detect the length of the data to be transmitted, and flags to be used |
47 | ; We'll detect the length of the data to be transmitted, and flags to be used |
48 | ; If there is some data, or any critical controls to send (SYN / RST), then transmit |
48 | ; If there is some data, or any critical controls to send (SYN / RST), then transmit |
49 | ; Otherwise, investigate further |
49 | ; Otherwise, investigate further |
50 | 50 | ||
51 | mov ebx, [eax + TCP_SOCKET.SND_MAX] |
51 | mov ebx, [eax + TCP_SOCKET.SND_MAX] |
52 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
52 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
53 | jbe .not_idle |
53 | jbe .not_idle |
54 | 54 | ||
55 | mov ebx, [eax + TCP_SOCKET.t_idle] |
55 | mov ebx, [eax + TCP_SOCKET.t_idle] |
56 | cmp ebx, [eax + TCP_SOCKET.t_rxtcur] |
56 | cmp ebx, [eax + TCP_SOCKET.t_rxtcur] |
57 | jbe .not_idle |
57 | jbe .not_idle |
58 | 58 | ||
59 | ; We have been idle for a while and no ACKS are expected to clock out any data we send.. |
59 | ; We have been idle for a while and no ACKS are expected to clock out any data we send.. |
60 | ; Slow start to get ack "clock" running again. |
60 | ; Slow start to get ack "clock" running again. |
61 | 61 | ||
62 | mov ebx, [eax + TCP_SOCKET.t_maxseg] |
62 | mov ebx, [eax + TCP_SOCKET.t_maxseg] |
63 | mov [eax + TCP_SOCKET.SND_CWND], ebx |
63 | mov [eax + TCP_SOCKET.SND_CWND], ebx |
64 | 64 | ||
65 | .not_idle: |
65 | .not_idle: |
66 | .again: |
66 | .again: |
67 | mov [temp_bits], 0 |
67 | mov [temp_bits], 0 |
68 | 68 | ||
69 | ; Calculate offset |
69 | ; Calculate offset |
70 | 70 | ||
71 | mov ebx, [eax + TCP_SOCKET.SND_NXT] |
71 | mov ebx, [eax + TCP_SOCKET.SND_NXT] |
72 | sub ebx, [eax + TCP_SOCKET.SND_UNA] |
72 | sub ebx, [eax + TCP_SOCKET.SND_UNA] |
73 | 73 | ||
74 | ; Determine window |
74 | ; Determine window |
75 | 75 | ||
76 | mov ecx, [eax + TCP_SOCKET.SND_WND] |
76 | mov ecx, [eax + TCP_SOCKET.SND_WND] |
77 | cmp ecx, [eax + TCP_SOCKET.SND_CWND] |
77 | cmp ecx, [eax + TCP_SOCKET.SND_CWND] |
78 | jb @f |
78 | jb @f |
79 | mov ecx, [eax + TCP_SOCKET.SND_CWND] |
79 | mov ecx, [eax + TCP_SOCKET.SND_CWND] |
80 | @@: |
80 | @@: |
81 | 81 | ||
82 | ; get flags in dl |
82 | ; get flags in dl |
83 | 83 | ||
84 | call tcp_outflags |
84 | call tcp_outflags |
85 | 85 | ||
86 | ;------------------------ |
86 | ;------------------------ |
87 | ; data being forced out ? |
87 | ; data being forced out ? |
88 | 88 | ||
89 | ; If in persist timeout with window of 0, send 1 byte. |
89 | ; If in persist timeout with window of 0, send 1 byte. |
90 | ; Otherwise, if window is small but nonzero, and timer expired, |
90 | ; Otherwise, if window is small but nonzero, and timer expired, |
91 | ; we will send what we can and go to transmit state |
91 | ; we will send what we can and go to transmit state |
92 | 92 | ||
93 | cmp [eax + TCP_SOCKET.t_force], 0 |
93 | cmp [eax + TCP_SOCKET.t_force], 0 |
94 | je .no_force |
94 | je .no_force |
95 | 95 | ||
96 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: forcing data out\n" |
96 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: forcing data out\n" |
97 | 97 | ||
98 | test ecx, ecx |
98 | test ecx, ecx |
99 | jnz .no_zero_window |
99 | jnz .no_zero_window |
100 | 100 | ||
101 | cmp ebx, [eax + STREAM_SOCKET.snd.size] |
101 | cmp ebx, [eax + STREAM_SOCKET.snd.size] |
102 | jae @f |
102 | jae @f |
103 | and dl, not (TH_FIN) |
103 | and dl, not (TH_FIN) |
104 | @@: |
104 | @@: |
105 | 105 | ||
106 | inc ecx |
106 | inc ecx |
107 | jmp .no_force |
107 | jmp .no_force |
108 | 108 | ||
109 | .no_zero_window: |
109 | .no_zero_window: |
110 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_persist |
110 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_persist |
111 | mov [eax + TCP_SOCKET.t_rxtshift], 0 |
111 | mov [eax + TCP_SOCKET.t_rxtshift], 0 |
112 | 112 | ||
113 | .no_force: |
113 | .no_force: |
114 | 114 | ||
115 | ;-------------------------------- |
115 | ;-------------------------------- |
116 | ; Calculate how much data to send |
116 | ; Calculate how much data to send |
117 | 117 | ||
118 | mov esi, [eax + STREAM_SOCKET.snd.size] |
118 | mov esi, [eax + STREAM_SOCKET.snd.size] |
119 | cmp esi, ecx |
119 | cmp esi, ecx |
120 | jb @f |
120 | jb @f |
121 | mov esi, ecx |
121 | mov esi, ecx |
122 | @@: |
122 | @@: |
123 | sub esi, ebx |
123 | sub esi, ebx |
124 | 124 | ||
125 | ;------------------------ |
125 | ;------------------------ |
126 | ; check for window shrink |
126 | ; check for window shrink |
127 | 127 | ||
128 | ; If FIN has been sent, but not ACKed, but we havent been called to retransmit, esi will be -1 |
128 | ; If FIN has been sent, but not ACKed, but we havent been called to retransmit, esi will be -1 |
129 | ; Otherwise, window shrank after we sent into it. |
129 | ; Otherwise, window shrank after we sent into it. |
130 | 130 | ||
131 | jae .not_persist |
131 | jae .not_persist |
132 | 132 | ||
133 | ; enter persist state |
133 | ; enter persist state |
134 | 134 | ||
135 | xor esi, esi |
135 | xor esi, esi |
136 | 136 | ||
137 | ; If window shrank to 0 |
137 | ; If window shrank to 0 |
138 | 138 | ||
139 | test ecx, ecx |
139 | test ecx, ecx |
140 | jnz @f |
140 | jnz @f |
141 | 141 | ||
142 | ; cancel pending retransmit |
142 | ; cancel pending retransmit |
143 | 143 | ||
144 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_retransmission |
144 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_retransmission |
145 | 145 | ||
146 | ; pull SND_NXT back to (closed) window, We will enter persist state below. |
146 | ; pull SND_NXT back to (closed) window, We will enter persist state below. |
147 | 147 | ||
148 | push [eax + TCP_SOCKET.SND_UNA] |
148 | push [eax + TCP_SOCKET.SND_UNA] |
149 | pop [eax + TCP_SOCKET.SND_NXT] |
149 | pop [eax + TCP_SOCKET.SND_NXT] |
150 | @@: |
150 | @@: |
151 | 151 | ||
152 | ; If window didn't close completely, just wait for an ACK |
152 | ; If window didn't close completely, just wait for an ACK |
153 | 153 | ||
154 | .not_persist: |
154 | .not_persist: |
155 | 155 | ||
156 | ;--------------------------- |
156 | ;--------------------------- |
157 | ; Send one segment at a time |
157 | ; Send one segment at a time |
158 | 158 | ||
159 | cmp esi, [eax + TCP_SOCKET.t_maxseg] |
159 | cmp esi, [eax + TCP_SOCKET.t_maxseg] |
160 | jbe @f |
160 | jbe @f |
161 | mov esi, [eax + TCP_SOCKET.t_maxseg] |
161 | mov esi, [eax + TCP_SOCKET.t_maxseg] |
162 | or [temp_bits], TCP_BIT_SENDALOT |
162 | or [temp_bits], TCP_BIT_SENDALOT |
163 | @@: |
163 | @@: |
164 | 164 | ||
165 | ;-------------------------------------------- |
165 | ;-------------------------------------------- |
166 | ; Turn of FIN flag if send buffer not emptied |
166 | ; Turn of FIN flag if send buffer not emptied |
167 | 167 | ||
168 | mov edi, [eax + TCP_SOCKET.SND_NXT] |
168 | mov edi, [eax + TCP_SOCKET.SND_NXT] |
169 | add edi, esi |
169 | add edi, esi |
170 | sub edi, [eax + TCP_SOCKET.SND_UNA] |
170 | sub edi, [eax + TCP_SOCKET.SND_UNA] |
171 | cmp edi, [eax + STREAM_SOCKET.snd.size] |
171 | cmp edi, [eax + STREAM_SOCKET.snd.size] |
172 | jae @f |
172 | jae @f |
173 | and dl, not (TH_FIN) |
173 | and dl, not (TH_FIN) |
174 | @@: |
174 | @@: |
175 | 175 | ||
176 | ;------------------------------- |
176 | ;------------------------------- |
177 | ; calculate window advertisement |
177 | ; calculate window advertisement |
178 | 178 | ||
179 | mov ecx, SOCKET_BUFFER_SIZE |
179 | mov ecx, SOCKET_BUFFER_SIZE |
180 | sub ecx, [eax + STREAM_SOCKET.rcv.size] |
180 | sub ecx, [eax + STREAM_SOCKET.rcv.size] |
181 | 181 | ||
182 | ;------------------------------ |
182 | ;------------------------------ |
183 | ; Sender silly window avoidance |
183 | ; Sender silly window avoidance |
184 | 184 | ||
185 | test esi, esi |
185 | test esi, esi |
186 | jz .len_zero |
186 | jz .len_zero |
187 | 187 | ||
188 | cmp esi, [eax + TCP_SOCKET.t_maxseg] |
188 | cmp esi, [eax + TCP_SOCKET.t_maxseg] |
189 | je .send |
189 | je .send |
190 | 190 | ||
191 | add ebx, esi ; offset + length |
191 | add ebx, esi ; offset + length |
192 | cmp ebx, [eax + STREAM_SOCKET.snd.size] |
192 | cmp ebx, [eax + STREAM_SOCKET.snd.size] |
193 | jb @f |
193 | jb @f |
194 | 194 | ||
195 | test [eax + TCP_SOCKET.t_flags], TF_NODELAY |
195 | test [eax + TCP_SOCKET.t_flags], TF_NODELAY |
196 | jnz .send |
196 | jnz .send |
197 | 197 | ||
198 | mov ebx, [eax + TCP_SOCKET.SND_MAX] |
198 | mov ebx, [eax + TCP_SOCKET.SND_MAX] |
199 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
199 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
200 | je .send |
200 | je .send |
201 | @@: |
201 | @@: |
202 | 202 | ||
203 | test [eax + TCP_SOCKET.t_force], -1 ;;; |
203 | test [eax + TCP_SOCKET.t_force], -1 ;;; |
204 | jnz .send |
204 | jnz .send |
205 | 205 | ||
206 | mov ebx, [eax + TCP_SOCKET.max_sndwnd] |
206 | mov ebx, [eax + TCP_SOCKET.max_sndwnd] |
207 | shr ebx, 1 |
207 | shr ebx, 1 |
208 | cmp esi, ebx |
208 | cmp esi, ebx |
209 | jae .send |
209 | jae .send |
210 | 210 | ||
211 | mov ebx, [eax + TCP_SOCKET.SND_NXT] |
211 | mov ebx, [eax + TCP_SOCKET.SND_NXT] |
212 | cmp ebx, [eax + TCP_SOCKET.SND_MAX] |
212 | cmp ebx, [eax + TCP_SOCKET.SND_MAX] |
213 | jb .send |
213 | jb .send |
214 | 214 | ||
215 | .len_zero: |
215 | .len_zero: |
216 | 216 | ||
217 | ;---------------------------------------- |
217 | ;---------------------------------------- |
218 | ; Check if a window update should be sent |
218 | ; Check if a window update should be sent |
219 | 219 | ||
220 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: window=%d\n", ecx |
220 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: window=%d\n", ecx |
221 | 221 | ||
222 | ; Compare available window to amount of window known to peer (as advertised window less next expected input) |
222 | ; Compare available window to amount of window known to peer (as advertised window less next expected input) |
223 | ; If the difference is at least two max size segments, or at least 50% of the maximum possible window, |
223 | ; If the difference is at least two max size segments, or at least 50% of the maximum possible window, |
224 | ; Then we want to send a window update to the peer. |
224 | ; Then we want to send a window update to the peer. |
225 | 225 | ||
226 | test ecx, ecx |
226 | test ecx, ecx |
227 | jz .no_window |
227 | jz .no_window |
228 | 228 | ||
229 | push ecx |
229 | push ecx |
230 | mov cl, [eax + TCP_SOCKET.RCV_SCALE] |
230 | mov cl, [eax + TCP_SOCKET.RCV_SCALE] |
231 | mov ebx, TCP_max_win |
231 | mov ebx, TCP_max_win |
232 | shl ebx, cl |
232 | shl ebx, cl |
233 | pop ecx |
233 | pop ecx |
234 | 234 | ||
235 | cmp ebx, ecx |
235 | cmp ebx, ecx |
236 | jb @f |
236 | jb @f |
237 | mov ebx, ecx |
237 | mov ebx, ecx |
238 | @@: |
238 | @@: |
239 | sub ebx, [eax + TCP_SOCKET.RCV_ADV] |
239 | sub ebx, [eax + TCP_SOCKET.RCV_ADV] |
240 | add ebx, [eax + TCP_SOCKET.RCV_NXT] |
240 | add ebx, [eax + TCP_SOCKET.RCV_NXT] |
241 | 241 | ||
242 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: we can increase window by %d bytes\n", ebx |
242 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: we can increase window by %d bytes\n", ebx |
243 | 243 | ||
244 | mov edi, [eax + TCP_SOCKET.t_maxseg] |
244 | mov edi, [eax + TCP_SOCKET.t_maxseg] |
245 | shl edi, 1 |
245 | shl edi, 1 |
246 | cmp ebx, edi |
246 | cmp ebx, edi |
247 | jae .send |
247 | jae .send |
248 | 248 | ||
249 | shl ebx, 1 |
249 | shl ebx, 1 |
250 | ; cmp ebx, [eax + TCP_SOCKET.] ;;; TODO: check with receive buffer high water mark |
250 | ; cmp ebx, [eax + TCP_SOCKET.] ;;; TODO: check with receive buffer high water mark |
251 | ; jae TCP_send |
251 | ; jae TCP_send |
252 | 252 | ||
253 | .no_window: |
253 | .no_window: |
254 | 254 | ||
255 | ;-------------------------- |
255 | ;-------------------------- |
256 | ; Should a segment be sent? |
256 | ; Should a segment be sent? |
257 | 257 | ||
258 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: Should a segment be sent?\n" |
258 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: Should a segment be sent?\n" |
259 | 259 | ||
260 | test [eax + TCP_SOCKET.t_flags], TF_ACKNOW ; we need to ACK |
260 | test [eax + TCP_SOCKET.t_flags], TF_ACKNOW ; we need to ACK |
261 | jnz .send |
261 | jnz .send |
262 | 262 | ||
263 | test dl, TH_SYN + TH_RST ; we need to send a SYN or RST |
263 | test dl, TH_SYN + TH_RST ; we need to send a SYN or RST |
264 | jnz .send |
264 | jnz .send |
265 | 265 | ||
266 | mov ebx, [eax + TCP_SOCKET.SND_UP] ; when urgent pointer is beyond start of send bufer |
266 | mov ebx, [eax + TCP_SOCKET.SND_UP] ; when urgent pointer is beyond start of send bufer |
267 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
267 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
268 | ja .send |
268 | ja .send |
269 | 269 | ||
270 | ; Do we need to send a FIN according to our state? |
270 | ; Do we need to send a FIN according to our state? |
271 | 271 | ||
272 | test dl, TH_FIN |
272 | test dl, TH_FIN |
273 | jz .enter_persist ; no reason to send, enter persist state |
273 | jz .enter_persist ; no reason to send, enter persist state |
274 | 274 | ||
275 | ; Do so if we didnt do it already |
275 | ; Do so if we didnt do it already |
276 | 276 | ||
277 | test [eax + TCP_SOCKET.t_flags], TF_SENTFIN |
277 | test [eax + TCP_SOCKET.t_flags], TF_SENTFIN |
278 | jz .send |
278 | jz .send |
279 | 279 | ||
280 | ; Or when we need to retransmit the FIN |
280 | ; Or when we need to retransmit the FIN |
281 | 281 | ||
282 | mov ebx, [eax + TCP_SOCKET.SND_NXT] |
282 | mov ebx, [eax + TCP_SOCKET.SND_NXT] |
283 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
283 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
284 | je .send |
284 | je .send |
285 | 285 | ||
286 | ;-------------------- |
286 | ;-------------------- |
287 | ; Enter persist state |
287 | ; Enter persist state |
288 | 288 | ||
289 | .enter_persist: |
289 | .enter_persist: |
290 | 290 | ||
291 | cmp [eax + STREAM_SOCKET.snd.size], 0 ; Data ready to send? |
291 | cmp [eax + STREAM_SOCKET.snd.size], 0 ; Data ready to send? |
292 | jne @f |
292 | jne @f |
293 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_retransmission |
293 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_retransmission |
294 | jne @f |
294 | jne @f |
295 | 295 | ||
296 | test [eax + TCP_SOCKET.timer_flags], timer_flag_persist ; Persist timer already expired? |
296 | test [eax + TCP_SOCKET.timer_flags], timer_flag_persist ; Persist timer already expired? |
297 | jnz @f |
297 | jnz @f |
298 | 298 | ||
299 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: Entering persist state\n" |
299 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: Entering persist state\n" |
300 | 300 | ||
301 | mov [eax + TCP_SOCKET.t_rxtshift], 0 |
301 | mov [eax + TCP_SOCKET.t_rxtshift], 0 |
302 | call tcp_set_persist |
302 | call tcp_set_persist |
303 | @@: |
303 | @@: |
304 | 304 | ||
305 | ;---------------------------- |
305 | ;---------------------------- |
306 | ; No reason to send a segment |
306 | ; No reason to send a segment |
307 | 307 | ||
308 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: No reason to send a segment\n" |
308 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_output: No reason to send a segment\n" |
309 | 309 | ||
310 | pusha |
310 | pusha |
311 | lea ecx, [eax + SOCKET.mutex] |
311 | lea ecx, [eax + SOCKET.mutex] |
312 | call mutex_unlock |
312 | call mutex_unlock |
313 | popa |
313 | popa |
314 | 314 | ||
315 | ; Fixme: returnvalue? |
315 | ; Fixme: returnvalue? |
316 | 316 | ||
317 | ret |
317 | ret |
318 | 318 | ||
319 | 319 | ||
320 | ;----------------------------------------------- |
320 | ;----------------------------------------------- |
321 | ; |
321 | ; |
322 | ; Send a segment |
322 | ; Send a segment |
323 | ; |
323 | ; |
324 | ; eax = socket pointer |
324 | ; eax = socket pointer |
325 | ; esi = data len |
325 | ; esi = data len |
326 | ; dl = flags |
326 | ; dl = flags |
327 | ; |
327 | ; |
328 | ;----------------------------------------------- |
328 | ;----------------------------------------------- |
329 | .send: |
329 | .send: |
330 | 330 | ||
331 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: socket=%x length=%u flags=%x\n", eax, esi, dl |
331 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: socket=%x length=%u flags=%x\n", eax, esi, dl |
332 | 332 | ||
333 | push eax ; save socket ptr |
333 | push eax ; save socket ptr |
334 | push esi ; and data length too |
334 | push esi ; and data length too |
335 | mov edi, sizeof.TCP_header ; edi will contain headersize |
335 | mov edi, sizeof.TCP_header ; edi will contain headersize |
336 | 336 | ||
337 | ;------------------------------------ |
337 | ;------------------------------------ |
338 | ; Send options with first SYN segment |
338 | ; Send options with first SYN segment |
339 | 339 | ||
340 | test dl, TH_SYN |
340 | test dl, TH_SYN |
341 | jz .options_done |
341 | jz .options_done |
342 | 342 | ||
343 | push [eax + TCP_SOCKET.ISS] |
343 | push [eax + TCP_SOCKET.ISS] |
344 | pop [eax + TCP_SOCKET.SND_NXT] |
344 | pop [eax + TCP_SOCKET.SND_NXT] |
345 | 345 | ||
346 | test [eax + TCP_SOCKET.t_flags], TF_NOOPT |
346 | test [eax + TCP_SOCKET.t_flags], TF_NOOPT |
347 | jnz .options_done |
347 | jnz .options_done |
348 | 348 | ||
349 | mov ecx, 1460 ;;;; FIXME: use routing blablabla to determine MSS |
349 | mov ecx, 1460 ;;;; FIXME: use routing blablabla to determine MSS |
350 | or ecx, TCP_OPT_MAXSEG shl 24 + 4 shl 16 |
350 | or ecx, TCP_OPT_MAXSEG shl 24 + 4 shl 16 |
351 | bswap ecx |
351 | bswap ecx |
352 | push ecx |
352 | push ecx |
353 | add di, 4 |
353 | add di, 4 |
354 | 354 | ||
355 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: added maxseg option\n" |
355 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: added maxseg option\n" |
356 | 356 | ||
357 | test [eax + TCP_SOCKET.t_flags], TF_REQ_SCALE |
357 | test [eax + TCP_SOCKET.t_flags], TF_REQ_SCALE |
358 | jz .no_scale |
358 | jz .no_scale |
359 | 359 | ||
360 | test dl, TH_ACK |
360 | test dl, TH_ACK |
361 | jz .scale_opt |
361 | jz .scale_opt |
362 | 362 | ||
363 | test [eax + TCP_SOCKET.t_flags], TF_RCVD_SCALE |
363 | test [eax + TCP_SOCKET.t_flags], TF_RCVD_SCALE |
364 | jz .no_scale |
364 | jz .no_scale |
365 | 365 | ||
366 | .scale_opt: |
366 | .scale_opt: |
367 | mov cl, [eax + TCP_SOCKET.request_r_scale] |
367 | mov cl, [eax + TCP_SOCKET.request_r_scale] |
368 | mov ch, TCP_OPT_NOP |
368 | mov ch, TCP_OPT_NOP |
369 | pushw cx |
369 | pushw cx |
370 | pushw TCP_OPT_WINDOW + 3 shl 8 |
370 | pushw TCP_OPT_WINDOW + 3 shl 8 |
371 | add di, 4 |
371 | add di, 4 |
372 | 372 | ||
373 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: added scale option\n" |
373 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: added scale option\n" |
374 | 374 | ||
375 | .no_scale: |
375 | .no_scale: |
376 | .no_syn: |
376 | .no_syn: |
377 | 377 | ||
378 | ;------------------------------------ |
378 | ;------------------------------------ |
379 | ; Make the timestamp option if needed |
379 | ; Make the timestamp option if needed |
380 | 380 | ||
381 | test [eax + TCP_SOCKET.t_flags], TF_REQ_TSTMP |
381 | test [eax + TCP_SOCKET.t_flags], TF_REQ_TSTMP |
382 | jz .no_timestamp |
382 | jz .no_timestamp |
383 | 383 | ||
384 | test dl, TH_RST |
384 | test dl, TH_RST |
385 | jnz .no_timestamp |
385 | jnz .no_timestamp |
386 | 386 | ||
387 | test dl, TH_ACK |
387 | test dl, TH_ACK |
388 | jz .timestamp |
388 | jz .timestamp |
389 | 389 | ||
390 | test [eax + TCP_SOCKET.t_flags], TF_RCVD_TSTMP |
390 | test [eax + TCP_SOCKET.t_flags], TF_RCVD_TSTMP |
391 | jz .no_timestamp |
391 | jz .no_timestamp |
392 | 392 | ||
393 | .timestamp: |
393 | .timestamp: |
394 | pushd 0 |
394 | pushd 0 |
395 | pushd [timer_ticks] |
395 | pushd [timer_ticks] |
396 | pushd TCP_OPT_NOP + TCP_OPT_NOP shl 8 + TCP_OPT_TIMESTAMP shl 16 + 10 shl 24 |
396 | pushd TCP_OPT_NOP + TCP_OPT_NOP shl 8 + TCP_OPT_TIMESTAMP shl 16 + 10 shl 24 |
397 | add di, 12 |
397 | add di, 12 |
398 | 398 | ||
399 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: added timestamp\n" |
399 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: added timestamp\n" |
400 | 400 | ||
401 | .no_timestamp: |
401 | .no_timestamp: |
402 | 402 | ||
403 | ; |
403 | ; |
404 | 404 | ||
405 | .options_done: |
405 | .options_done: |
406 | 406 | ||
407 | ; eax = socket ptr |
407 | ; eax = socket ptr |
408 | ; edx = flags |
408 | ; edx = flags |
409 | ; edi = header size |
409 | ; edi = header size |
410 | ; esi = data len |
410 | ; esi = data len |
411 | 411 | ||
412 | ;--------------------------------------------- |
412 | ;--------------------------------------------- |
413 | ; check if we dont exceed the max segment size |
413 | ; check if we dont exceed the max segment size |
414 | 414 | ||
415 | add esi, edi ; total TCP segment size |
415 | add esi, edi ; total TCP segment size |
416 | cmp esi, [eax + TCP_SOCKET.t_maxseg] |
416 | cmp esi, [eax + TCP_SOCKET.t_maxseg] |
417 | jbe .no_overflow |
417 | jbe .no_overflow |
418 | 418 | ||
419 | mov esi, [eax + TCP_SOCKET.t_maxseg] |
419 | mov esi, [eax + TCP_SOCKET.t_maxseg] |
420 | or [temp_bits], TCP_BIT_SENDALOT |
420 | or [temp_bits], TCP_BIT_SENDALOT |
421 | .no_overflow: |
421 | .no_overflow: |
422 | 422 | ||
423 | ; Update stats |
423 | ; Update stats |
424 | 424 | ||
425 | test esi, esi |
425 | test esi, esi |
426 | jz .zero_data |
426 | jz .zero_data |
427 | 427 | ||
428 | cmp [eax + TCP_SOCKET.t_force], 1 |
428 | cmp [eax + TCP_SOCKET.t_force], 1 |
429 | jne @f |
429 | jne @f |
430 | cmp esi, 1 |
430 | cmp esi, 1 |
431 | jne @f |
431 | jne @f |
432 | inc [TCPS_sndprobe] |
432 | inc [TCPS_sndprobe] |
433 | jmp .eos |
433 | jmp .eos |
434 | @@: |
434 | @@: |
435 | 435 | ||
436 | mov ebx, [eax + TCP_SOCKET.SND_NXT] |
436 | mov ebx, [eax + TCP_SOCKET.SND_NXT] |
437 | cmp ebx, [eax + TCP_SOCKET.SND_MAX] |
437 | cmp ebx, [eax + TCP_SOCKET.SND_MAX] |
438 | jae @f |
438 | jae @f |
439 | inc [TCPS_sndrexmitpack] |
439 | inc [TCPS_sndrexmitpack] |
440 | add [TCPS_sndrexmitbyte], esi |
440 | add [TCPS_sndrexmitbyte], esi |
441 | jmp .eos |
441 | jmp .eos |
442 | @@: |
442 | @@: |
443 | inc [TCPS_sndpack] |
443 | inc [TCPS_sndpack] |
444 | add [TCPS_sndbyte], esi |
444 | add [TCPS_sndbyte], esi |
445 | jmp .eos |
445 | jmp .eos |
446 | 446 | ||
447 | .zero_data: |
447 | .zero_data: |
448 | test [eax + TCP_SOCKET.t_flags], TF_ACKNOW |
448 | test [eax + TCP_SOCKET.t_flags], TF_ACKNOW |
449 | jz @f |
449 | jz @f |
450 | inc [TCPS_sndacks] |
450 | inc [TCPS_sndacks] |
451 | jmp .eos |
451 | jmp .eos |
452 | @@: |
452 | @@: |
453 | test dl, TH_SYN + TH_FIN + TH_RST |
453 | test dl, TH_SYN + TH_FIN + TH_RST |
454 | jz @f |
454 | jz @f |
455 | inc [TCPS_sndctrl] |
455 | inc [TCPS_sndctrl] |
456 | jmp .eos |
456 | jmp .eos |
457 | @@: |
457 | @@: |
458 | mov ebx, [eax + TCP_SOCKET.SND_UP] |
458 | mov ebx, [eax + TCP_SOCKET.SND_UP] |
459 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
459 | cmp ebx, [eax + TCP_SOCKET.SND_UNA] |
460 | jb @f |
460 | jb @f |
461 | inc [TCPS_sndurg] |
461 | inc [TCPS_sndurg] |
462 | jmp .eos |
462 | jmp .eos |
463 | @@: |
463 | @@: |
464 | inc [TCPS_sndwinup] |
464 | inc [TCPS_sndwinup] |
465 | 465 | ||
466 | .eos: |
466 | .eos: |
467 | 467 | ||
468 | ;---------------------------------------------------- |
468 | ;---------------------------------------------------- |
469 | ; Calculate the receive window. |
469 | ; Calculate the receive window. |
470 | ; Dont shrink window, but avoid silly window syndrome |
470 | ; Dont shrink window, but avoid silly window syndrome |
471 | 471 | ||
472 | mov ebx, SOCKET_BUFFER_SIZE |
472 | mov ebx, SOCKET_BUFFER_SIZE |
473 | sub ebx, [eax + STREAM_SOCKET.rcv.size] |
473 | sub ebx, [eax + STREAM_SOCKET.rcv.size] |
474 | 474 | ||
475 | cmp ebx, SOCKET_BUFFER_SIZE/4 |
475 | cmp ebx, SOCKET_BUFFER_SIZE/4 |
476 | jae @f |
476 | jae @f |
477 | cmp ebx, [eax + TCP_SOCKET.t_maxseg] |
477 | cmp ebx, [eax + TCP_SOCKET.t_maxseg] |
478 | jae @f |
478 | jae @f |
479 | xor ebx, ebx |
479 | xor ebx, ebx |
480 | @@: |
480 | @@: |
481 | 481 | ||
482 | cmp ebx, TCP_max_win |
482 | cmp ebx, TCP_max_win |
483 | jbe @f |
483 | jbe @f |
484 | mov ebx, TCP_max_win |
484 | mov ebx, TCP_max_win |
485 | @@: |
485 | @@: |
486 | 486 | ||
487 | mov ecx, [eax + TCP_SOCKET.RCV_ADV] |
487 | mov ecx, [eax + TCP_SOCKET.RCV_ADV] |
488 | sub ecx, [eax + TCP_SOCKET.RCV_NXT] |
488 | sub ecx, [eax + TCP_SOCKET.RCV_NXT] |
489 | cmp ebx, ecx |
489 | cmp ebx, ecx |
490 | ja @f |
490 | jg @f |
491 | mov ebx, ecx |
491 | mov ebx, ecx |
492 | @@: |
492 | @@: |
493 | 493 | ||
494 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: window=%u\n", ebx |
494 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: window=%u\n", ebx |
495 | mov [window], ebx |
495 | mov [window], ebx |
496 | 496 | ||
497 | mov cl, [eax + TCP_SOCKET.RCV_SCALE] |
497 | mov cl, [eax + TCP_SOCKET.RCV_SCALE] |
498 | shr ebx, cl |
498 | shr ebx, cl |
499 | xchg bl, bh |
499 | xchg bl, bh |
500 | 500 | ||
501 | ;----------------------------------------------------------------- |
501 | ;----------------------------------------------------------------- |
502 | ; Start by pushing all TCP header values in reverse order on stack |
502 | ; Start by pushing all TCP header values in reverse order on stack |
503 | ; (essentially, creating the tcp header on the stack!) |
503 | ; (essentially, creating the tcp header on the stack!) |
504 | 504 | ||
505 | pushw 0 ; UrgentPointer |
505 | pushw 0 ; UrgentPointer |
506 | pushw 0 ; Checksum |
506 | pushw 0 ; Checksum |
507 | pushw bx ; Window |
507 | pushw bx ; Window |
508 | shl edi, 2 ; DataOffset |
508 | shl edi, 2 ; DataOffset |
509 | shl dx, 8 |
509 | shl dx, 8 |
510 | or dx, di ; Flags |
510 | or dx, di ; Flags |
511 | pushw dx |
511 | pushw dx |
512 | shr edi, 2 ; DataOffset |
512 | shr edi, 2 ; DataOffset |
513 | 513 | ||
514 | push [eax + TCP_SOCKET.RCV_NXT] ; AckNumber |
514 | push [eax + TCP_SOCKET.RCV_NXT] ; AckNumber |
515 | ntohd [esp] |
515 | ntohd [esp] |
516 | 516 | ||
517 | push [eax + TCP_SOCKET.SND_NXT] ; SequenceNumber |
517 | push [eax + TCP_SOCKET.SND_NXT] ; SequenceNumber |
518 | ntohd [esp] |
518 | ntohd [esp] |
519 | 519 | ||
520 | push [eax + TCP_SOCKET.RemotePort] ; DestinationPort |
520 | push [eax + TCP_SOCKET.RemotePort] ; DestinationPort |
521 | push [eax + TCP_SOCKET.LocalPort] ; SourcePort |
521 | push [eax + TCP_SOCKET.LocalPort] ; SourcePort |
522 | 522 | ||
523 | push edi ; header size |
523 | push edi ; header size |
524 | 524 | ||
525 | ;--------------------- |
525 | ;--------------------- |
526 | ; Create the IP packet |
526 | ; Create the IP packet |
527 | 527 | ||
528 | mov ecx, esi |
528 | mov ecx, esi |
529 | mov ebx, [eax + IP_SOCKET.device] |
529 | mov ebx, [eax + IP_SOCKET.device] |
530 | mov edx, [eax + IP_SOCKET.LocalIP] ; source ip |
530 | mov edx, [eax + IP_SOCKET.LocalIP] ; source ip |
531 | mov edi, [eax + IP_SOCKET.RemoteIP] ; dest ip |
531 | mov edi, [eax + IP_SOCKET.RemoteIP] ; dest ip |
532 | mov al, [eax + IP_SOCKET.ttl] |
532 | mov al, [eax + IP_SOCKET.ttl] |
533 | mov ah, IP_PROTO_TCP |
533 | mov ah, IP_PROTO_TCP |
534 | call ipv4_output |
534 | call ipv4_output |
535 | jz .ip_error |
535 | jz .ip_error |
536 | 536 | ||
537 | ;------------------------------------------ |
537 | ;------------------------------------------ |
538 | ; Move TCP header from stack to TCP segment |
538 | ; Move TCP header from stack to TCP segment |
539 | 539 | ||
540 | push ecx |
540 | push ecx |
541 | mov ecx, [esp + 4] |
541 | mov ecx, [esp + 4] |
542 | lea esi, [esp + 8] |
542 | lea esi, [esp + 8] |
543 | shr ecx, 2 ; count is in bytes, we will work with dwords |
543 | shr ecx, 2 ; count is in bytes, we will work with dwords |
544 | rep movsd |
544 | rep movsd |
545 | pop ecx ; full TCP packet size |
545 | pop ecx ; full TCP packet size |
546 | 546 | ||
547 | pop esi ; headersize |
547 | pop esi ; headersize |
548 | add esp, esi ; remove it from stack |
548 | add esp, esi ; remove it from stack |
549 | 549 | ||
550 | push eax ; packet ptr for send proc |
550 | push eax ; packet ptr for send proc |
551 | 551 | ||
552 | mov edx, edi ; begin of data |
552 | mov edx, edi ; begin of data |
553 | sub edx, esi ; begin of packet (edi = begin of data) |
553 | sub edx, esi ; begin of packet (edi = begin of data) |
554 | push ecx |
554 | push ecx |
555 | sub ecx, esi ; data size |
555 | sub ecx, esi ; data size |
556 | 556 | ||
557 | ;-------------- |
557 | ;-------------- |
558 | ; Copy the data |
558 | ; Copy the data |
559 | 559 | ||
560 | ; eax = ptr to ring struct |
560 | ; eax = ptr to ring struct |
561 | ; ecx = buffer size |
561 | ; ecx = buffer size |
562 | ; edi = ptr to buffer |
562 | ; edi = ptr to buffer |
563 | 563 | ||
564 | mov eax, [esp + 12] ; get socket ptr |
564 | mov eax, [esp + 12] ; get socket ptr |
565 | 565 | ||
566 | push edx |
566 | push edx |
567 | push [eax + TCP_SOCKET.SND_NXT] ; we'll need this for timing the transmission |
567 | push [eax + TCP_SOCKET.SND_NXT] ; we'll need this for timing the transmission |
568 | test ecx, ecx |
568 | test ecx, ecx |
569 | jz .nodata |
569 | jz .nodata |
570 | mov edx, [eax + TCP_SOCKET.SND_NXT] |
570 | mov edx, [eax + TCP_SOCKET.SND_NXT] |
571 | add [eax + TCP_SOCKET.SND_NXT], ecx ; update sequence number |
571 | add [eax + TCP_SOCKET.SND_NXT], ecx ; update sequence number |
572 | sub edx, [eax + TCP_SOCKET.SND_UNA] ; offset |
572 | sub edx, [eax + TCP_SOCKET.SND_UNA] ; offset |
573 | add eax, STREAM_SOCKET.snd |
573 | add eax, STREAM_SOCKET.snd |
574 | call socket_ring_read |
574 | call socket_ring_read |
575 | .nodata: |
575 | .nodata: |
576 | pop edi |
576 | pop edi |
577 | pop esi ; begin of data |
577 | pop esi ; begin of data |
578 | pop ecx ; full packet size |
578 | pop ecx ; full packet size |
579 | mov eax, [esp + 8] ; socket ptr |
579 | mov eax, [esp + 8] ; socket ptr |
580 | 580 | ||
581 | ;---------------------------- |
581 | ;---------------------------- |
582 | ; initialize retransmit timer |
582 | ; initialize retransmit timer |
583 | 583 | ||
584 | ;TODO: check t_force and persist |
584 | ;TODO: check t_force and persist |
585 | 585 | ||
586 | test [esi + TCP_header.Flags], TH_SYN + TH_FIN ; syn and fin take a sequence number |
586 | test [esi + TCP_header.Flags], TH_SYN + TH_FIN ; syn and fin take a sequence number |
587 | jz @f |
587 | jz @f |
588 | inc [eax + TCP_SOCKET.SND_NXT] |
588 | inc [eax + TCP_SOCKET.SND_NXT] |
589 | test [esi + TCP_header.Flags], TH_FIN |
589 | test [esi + TCP_header.Flags], TH_FIN |
590 | jz @f |
590 | jz @f |
591 | or [eax + TCP_SOCKET.t_flags], TF_SENTFIN ; if we sent a fin, set the sentfin flag |
591 | or [eax + TCP_SOCKET.t_flags], TF_SENTFIN ; if we sent a fin, set the sentfin flag |
592 | @@: |
592 | @@: |
593 | 593 | ||
594 | mov edx, [eax + TCP_SOCKET.SND_NXT] |
594 | mov edx, [eax + TCP_SOCKET.SND_NXT] |
595 | cmp edx, [eax + TCP_SOCKET.SND_MAX] ; is this a retransmission? |
595 | cmp edx, [eax + TCP_SOCKET.SND_MAX] ; is this a retransmission? |
596 | jbe @f |
596 | jbe @f |
597 | mov [eax + TCP_SOCKET.SND_MAX], edx ; [eax + TCP_SOCKET.SND_NXT] from before we updated it |
597 | mov [eax + TCP_SOCKET.SND_MAX], edx ; [eax + TCP_SOCKET.SND_NXT] from before we updated it |
598 | 598 | ||
599 | cmp [eax + TCP_SOCKET.t_rtt], 0 ; are we currently timing anything? |
599 | cmp [eax + TCP_SOCKET.t_rtt], 0 ; are we currently timing anything? |
600 | je @f |
600 | je @f |
601 | mov [eax + TCP_SOCKET.t_rtt], 1 ; nope, start transmission timer |
601 | mov [eax + TCP_SOCKET.t_rtt], 1 ; nope, start transmission timer |
602 | mov [eax + TCP_SOCKET.t_rtseq], edi |
602 | mov [eax + TCP_SOCKET.t_rtseq], edi |
603 | inc [TCPS_segstimed] |
603 | inc [TCPS_segstimed] |
604 | @@: |
604 | @@: |
605 | 605 | ||
606 | ; set retransmission timer if not already set, and not doing an ACK or keepalive probe |
606 | ; set retransmission timer if not already set, and not doing an ACK or keepalive probe |
607 | 607 | ||
608 | test [eax + TCP_SOCKET.timer_flags], timer_flag_retransmission |
608 | test [eax + TCP_SOCKET.timer_flags], timer_flag_retransmission |
609 | jnz .retransmit_set |
609 | jnz .retransmit_set |
610 | 610 | ||
611 | cmp edx, [eax + TCP_SOCKET.SND_UNA] ; edx is still [eax + TCP_SOCKET.SND_NXT] |
611 | cmp edx, [eax + TCP_SOCKET.SND_UNA] ; edx is still [eax + TCP_SOCKET.SND_NXT] |
612 | je .retransmit_set |
612 | je .retransmit_set |
613 | 613 | ||
614 | mov edx, [eax + TCP_SOCKET.t_rxtcur] |
614 | mov edx, [eax + TCP_SOCKET.t_rxtcur] |
615 | mov [eax + TCP_SOCKET.timer_retransmission], edx |
615 | mov [eax + TCP_SOCKET.timer_retransmission], edx |
616 | or [eax + TCP_SOCKET.timer_flags], timer_flag_retransmission |
616 | or [eax + TCP_SOCKET.timer_flags], timer_flag_retransmission |
617 | 617 | ||
618 | test [eax + TCP_SOCKET.timer_flags], timer_flag_persist |
618 | test [eax + TCP_SOCKET.timer_flags], timer_flag_persist |
619 | jz .retransmit_set |
619 | jz .retransmit_set |
620 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_persist |
620 | and [eax + TCP_SOCKET.timer_flags], not timer_flag_persist |
621 | mov [eax + TCP_SOCKET.t_rxtshift], 0 |
621 | mov [eax + TCP_SOCKET.t_rxtshift], 0 |
622 | .retransmit_set: |
622 | .retransmit_set: |
623 | 623 | ||
624 | ;-------------------- |
624 | ;-------------------- |
625 | ; Create the checksum |
625 | ; Create the checksum |
626 | 626 | ||
627 | xor dx, dx |
627 | xor dx, dx |
628 | test [ebx + NET_DEVICE.hwacc], NET_HWACC_TCP_IPv4_OUT |
628 | test [ebx + NET_DEVICE.hwacc], NET_HWACC_TCP_IPv4_OUT |
629 | jnz .checksum_ok |
629 | jnz .checksum_ok |
630 | 630 | ||
631 | tcp_checksum (eax + IP_SOCKET.LocalIP), (eax + IP_SOCKET.RemoteIP) |
631 | tcp_checksum (eax + IP_SOCKET.LocalIP), (eax + IP_SOCKET.RemoteIP) |
632 | 632 | ||
633 | .checksum_ok: |
633 | .checksum_ok: |
634 | mov [esi + TCP_header.Checksum], dx |
634 | mov [esi + TCP_header.Checksum], dx |
635 | 635 | ||
636 | ;---------------- |
636 | ;---------------- |
637 | ; Send the packet |
637 | ; Send the packet |
638 | 638 | ||
639 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: Sending with device %x\n", ebx |
639 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: Sending with device %x\n", ebx |
640 | call [ebx + NET_DEVICE.transmit] |
640 | call [ebx + NET_DEVICE.transmit] |
641 | jnz .send_error |
641 | jnz .send_error |
642 | 642 | ||
643 | ;--------------- |
643 | ;--------------- |
644 | ; Ok, data sent! |
644 | ; Ok, data sent! |
645 | 645 | ||
646 | pop ecx |
646 | pop ecx |
647 | pop eax |
647 | pop eax |
648 | 648 | ||
649 | call net_ptr_to_num4 |
649 | call net_ptr_to_num4 |
650 | inc [TCP_segments_tx + edi] |
650 | inc [TCP_segments_tx + edi] |
651 | inc [TCPS_sndtotal] |
651 | inc [TCPS_sndtotal] |
652 | 652 | ||
653 | ; update advertised receive window |
653 | ; update advertised receive window |
654 | 654 | ||
655 | mov ecx, [window] |
655 | mov ecx, [window] |
656 | test ecx, ecx |
656 | test ecx, ecx |
657 | jz @f |
657 | jz @f |
658 | add ecx, [eax + TCP_SOCKET.RCV_NXT] |
658 | add ecx, [eax + TCP_SOCKET.RCV_NXT] |
659 | cmp ecx, [eax + TCP_SOCKET.RCV_ADV] |
659 | cmp ecx, [eax + TCP_SOCKET.RCV_ADV] |
660 | jbe @f |
660 | jbe @f |
661 | mov [eax + TCP_SOCKET.RCV_ADV], ecx |
661 | mov [eax + TCP_SOCKET.RCV_ADV], ecx |
662 | @@: |
662 | @@: |
663 | 663 | ||
664 | ; update last ack sent |
664 | ; update last ack sent |
665 | 665 | ||
666 | push [eax + TCP_SOCKET.RCV_NXT] |
666 | push [eax + TCP_SOCKET.RCV_NXT] |
667 | pop [eax + TCP_SOCKET.last_ack_sent] |
667 | pop [eax + TCP_SOCKET.last_ack_sent] |
668 | 668 | ||
669 | ; clear the ACK flags |
669 | ; clear the ACK flags |
670 | 670 | ||
671 | and [eax + TCP_SOCKET.t_flags], not (TF_ACKNOW + TF_DELACK) |
671 | and [eax + TCP_SOCKET.t_flags], not (TF_ACKNOW + TF_DELACK) |
672 | 672 | ||
673 | ;-------------- |
673 | ;-------------- |
674 | ; unlock socket |
674 | ; unlock socket |
675 | 675 | ||
676 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: unlocking socket 0x%x\n", eax |
676 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: unlocking socket 0x%x\n", eax |
677 | 677 | ||
678 | push eax |
678 | push eax |
679 | lea ecx, [eax + SOCKET.mutex] |
679 | lea ecx, [eax + SOCKET.mutex] |
680 | call mutex_unlock |
680 | call mutex_unlock |
681 | pop eax |
681 | pop eax |
682 | 682 | ||
683 | ;----------------------------- |
683 | ;----------------------------- |
684 | ; Check if we need more output |
684 | ; Check if we need more output |
685 | 685 | ||
686 | test [temp_bits], TCP_BIT_SENDALOT |
686 | test [temp_bits], TCP_BIT_SENDALOT |
687 | jnz tcp_output.again |
687 | jnz tcp_output.again |
688 | 688 | ||
689 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: success!\n" |
689 | DEBUGF DEBUG_NETWORK_VERBOSE, "TCP_send: success!\n" |
690 | 690 | ||
691 | xor eax, eax |
691 | xor eax, eax |
692 | ret |
692 | ret |
693 | 693 | ||
694 | 694 | ||
695 | .ip_error: |
695 | .ip_error: |
696 | pop ecx |
696 | pop ecx |
697 | add esp, ecx |
697 | add esp, ecx |
698 | add esp, 4 |
698 | add esp, 4 |
699 | pop eax |
699 | pop eax |
700 | 700 | ||
701 | mov [eax + TCP_SOCKET.timer_retransmission], TCP_time_re_min |
701 | mov [eax + TCP_SOCKET.timer_retransmission], TCP_time_re_min |
702 | or [eax + TCP_SOCKET.timer_flags], timer_flag_retransmission |
702 | or [eax + TCP_SOCKET.timer_flags], timer_flag_retransmission |
703 | 703 | ||
704 | lea ecx, [eax + SOCKET.mutex] |
704 | lea ecx, [eax + SOCKET.mutex] |
705 | call mutex_unlock |
705 | call mutex_unlock |
706 | 706 | ||
707 | DEBUGF DEBUG_NETWORK_ERROR, "TCP_send: IP error\n" |
707 | DEBUGF DEBUG_NETWORK_ERROR, "TCP_send: IP error\n" |
708 | 708 | ||
709 | or eax, -1 |
709 | or eax, -1 |
710 | ret |
710 | ret |
711 | 711 | ||
712 | 712 | ||
713 | .send_error: |
713 | .send_error: |
714 | add esp, 4 |
714 | add esp, 4 |
715 | pop eax |
715 | pop eax |
716 | 716 | ||
717 | lea ecx, [eax + SOCKET.mutex] |
717 | lea ecx, [eax + SOCKET.mutex] |
718 | call mutex_unlock |
718 | call mutex_unlock |
719 | 719 | ||
720 | DEBUGF DEBUG_NETWORK_ERROR, "TCP_send: sending failed\n" |
720 | DEBUGF DEBUG_NETWORK_ERROR, "TCP_send: sending failed\n" |
721 | 721 | ||
722 | or eax, -2 |
722 | or eax, -2 |
723 | ret |
723 | ret |
724 | 724 | ||
725 | 725 | ||
726 | endp |
726 | endp |