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8a67d61d | 1 | /** @file\r |
dfc1f033 | 2 | TCP timer related functions.\r |
3 | \r | |
4 | Copyright (c) 2005 - 2007, Intel Corporation<BR>\r | |
8a67d61d | 5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
dfc1f033 | 8 | http://opensource.org/licenses/bsd-license.php<BR>\r |
8a67d61d | 9 | \r |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
8a67d61d | 13 | **/\r |
14 | \r | |
15 | #include "Tcp4Main.h"\r | |
16 | \r | |
17 | UINT32 mTcpTick = 1000;\r | |
18 | \r | |
120db52c | 19 | /**\r |
20 | Connect timeout handler.\r | |
21 | \r | |
22 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
23 | \r | |
24 | **/\r | |
8a67d61d | 25 | VOID\r |
26 | TcpConnectTimeout (\r | |
77f00155 | 27 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 28 | );\r |
29 | \r | |
120db52c | 30 | /**\r |
31 | Timeout handler for TCP retransmission timer.\r | |
32 | \r | |
33 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
34 | \r | |
35 | **/\r | |
8a67d61d | 36 | VOID\r |
37 | TcpRexmitTimeout (\r | |
77f00155 | 38 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 39 | );\r |
120db52c | 40 | \r |
41 | /**\r | |
42 | Timeout handler for window probe timer.\r | |
8a67d61d | 43 | \r |
120db52c | 44 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r |
45 | \r | |
46 | **/\r | |
8a67d61d | 47 | VOID\r |
48 | TcpProbeTimeout (\r | |
77f00155 | 49 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 50 | );\r |
51 | \r | |
120db52c | 52 | /**\r |
53 | Timeout handler for keepalive timer.\r | |
54 | \r | |
55 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
56 | \r | |
57 | **/\r | |
8a67d61d | 58 | VOID\r |
59 | TcpKeepaliveTimeout (\r | |
77f00155 | 60 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 61 | );\r |
62 | \r | |
120db52c | 63 | /**\r |
64 | Timeout handler for FIN_WAIT_2 timer.\r | |
65 | \r | |
66 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
67 | \r | |
68 | **/\r | |
8a67d61d | 69 | VOID\r |
70 | TcpFinwait2Timeout (\r | |
77f00155 | 71 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 72 | );\r |
73 | \r | |
120db52c | 74 | /**\r |
75 | Timeout handler for 2MSL timer.\r | |
76 | \r | |
77 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
78 | \r | |
79 | **/\r | |
8a67d61d | 80 | VOID\r |
81 | Tcp2MSLTimeout (\r | |
77f00155 | 82 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 83 | );\r |
84 | \r | |
85 | TCP_TIMER_HANDLER mTcpTimerHandler[TCP_TIMER_NUMBER] = {\r | |
86 | TcpConnectTimeout,\r | |
87 | TcpRexmitTimeout,\r | |
88 | TcpProbeTimeout,\r | |
89 | TcpKeepaliveTimeout,\r | |
90 | TcpFinwait2Timeout,\r | |
91 | Tcp2MSLTimeout,\r | |
92 | };\r | |
93 | \r | |
8a67d61d | 94 | /**\r |
95 | Close the TCP connection.\r | |
96 | \r | |
97 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
98 | \r | |
8a67d61d | 99 | **/\r |
100 | VOID\r | |
101 | TcpClose (\r | |
77f00155 | 102 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 103 | )\r |
104 | {\r | |
105 | NetbufFreeList (&Tcb->SndQue);\r | |
106 | NetbufFreeList (&Tcb->RcvQue);\r | |
107 | \r | |
108 | TcpSetState (Tcb, TCP_CLOSED);\r | |
109 | }\r | |
110 | \r | |
111 | \r | |
112 | /**\r | |
113 | Connect timeout handler.\r | |
114 | \r | |
115 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
116 | \r | |
8a67d61d | 117 | **/\r |
8a67d61d | 118 | VOID\r |
119 | TcpConnectTimeout (\r | |
77f00155 | 120 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 121 | )\r |
122 | {\r | |
123 | if (!TCP_CONNECTED (Tcb->State)) {\r | |
e48e37fc | 124 | DEBUG ((EFI_D_ERROR, "TcpConnectTimeout: connection closed "\r |
0e549d5b | 125 | "because conenction timer timeout for TCB %p\n", Tcb));\r |
8a67d61d | 126 | \r |
127 | if (EFI_ABORTED == Tcb->Sk->SockError) {\r | |
128 | SOCK_ERROR (Tcb->Sk, EFI_TIMEOUT);\r | |
129 | }\r | |
130 | \r | |
131 | if (TCP_SYN_RCVD == Tcb->State) {\r | |
e48e37fc | 132 | DEBUG ((EFI_D_WARN, "TcpConnectTimeout: send reset because "\r |
0e549d5b | 133 | "connection timer timeout for TCB %p\n", Tcb));\r |
8a67d61d | 134 | \r |
135 | TcpResetConnection (Tcb);\r | |
136 | \r | |
137 | }\r | |
138 | \r | |
139 | TcpClose (Tcb);\r | |
140 | }\r | |
141 | }\r | |
142 | \r | |
143 | \r | |
144 | /**\r | |
145 | Timeout handler for TCP retransmission timer.\r | |
146 | \r | |
147 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
148 | \r | |
8a67d61d | 149 | **/\r |
8a67d61d | 150 | VOID\r |
151 | TcpRexmitTimeout (\r | |
77f00155 | 152 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 153 | )\r |
154 | {\r | |
155 | UINT32 FlightSize;\r | |
156 | \r | |
e48e37fc | 157 | DEBUG ((EFI_D_WARN, "TcpRexmitTimeout: transmission "\r |
0e549d5b | 158 | "timeout for TCB %p\n", Tcb));\r |
8a67d61d | 159 | \r |
160 | //\r | |
161 | // Set the congestion window. FlightSize is the\r | |
162 | // amount of data that has been sent but not\r | |
163 | // yet ACKed.\r | |
164 | //\r | |
165 | FlightSize = TCP_SUB_SEQ (Tcb->SndNxt, Tcb->SndUna);\r | |
36ee91ca | 166 | Tcb->Ssthresh = MAX ((UINT32) (2 * Tcb->SndMss), FlightSize / 2);\r |
8a67d61d | 167 | \r |
168 | Tcb->CWnd = Tcb->SndMss;\r | |
169 | Tcb->LossRecover = Tcb->SndNxt;\r | |
170 | \r | |
171 | Tcb->LossTimes++;\r | |
120db52c | 172 | if ((Tcb->LossTimes > Tcb->MaxRexmit) &&\r |
8a67d61d | 173 | !TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_CONNECT)) {\r |
174 | \r | |
e48e37fc | 175 | DEBUG ((EFI_D_ERROR, "TcpRexmitTimeout: connection closed "\r |
0e549d5b | 176 | "because too many timeouts for TCB %p\n", Tcb));\r |
8a67d61d | 177 | \r |
178 | if (EFI_ABORTED == Tcb->Sk->SockError) {\r | |
179 | SOCK_ERROR (Tcb->Sk, EFI_TIMEOUT);\r | |
180 | }\r | |
181 | \r | |
182 | TcpClose (Tcb);\r | |
183 | return ;\r | |
184 | }\r | |
185 | \r | |
186 | TcpBackoffRto (Tcb);\r | |
187 | TcpRetransmit (Tcb, Tcb->SndUna);\r | |
188 | TcpSetTimer (Tcb, TCP_TIMER_REXMIT, Tcb->Rto);\r | |
189 | \r | |
190 | Tcb->CongestState = TCP_CONGEST_LOSS;\r | |
8a67d61d | 191 | TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_RTT_ON);\r |
192 | }\r | |
193 | \r | |
194 | \r | |
195 | /**\r | |
196 | Timeout handler for window probe timer.\r | |
197 | \r | |
198 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
199 | \r | |
8a67d61d | 200 | **/\r |
8a67d61d | 201 | VOID\r |
202 | TcpProbeTimeout (\r | |
77f00155 | 203 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 204 | )\r |
205 | {\r | |
206 | //\r | |
207 | // This is the timer for sender's SWSA. RFC1122 requires\r | |
208 | // a timer set for sender's SWSA, and suggest combine it\r | |
209 | // with window probe timer. If data is sent, don't set\r | |
210 | // the probe timer, since retransmit timer is on.\r | |
211 | //\r | |
212 | if ((TcpDataToSend (Tcb, 1) != 0) && (TcpToSendData (Tcb, 1) > 0)) {\r | |
213 | \r | |
276dcc1b | 214 | ASSERT (TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_REXMIT) != 0);\r |
8a67d61d | 215 | return ;\r |
216 | }\r | |
217 | \r | |
218 | TcpSendZeroProbe (Tcb);\r | |
219 | TcpSetProbeTimer (Tcb);\r | |
220 | }\r | |
221 | \r | |
222 | \r | |
223 | /**\r | |
224 | Timeout handler for keepalive timer.\r | |
225 | \r | |
226 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
227 | \r | |
8a67d61d | 228 | **/\r |
8a67d61d | 229 | VOID\r |
230 | TcpKeepaliveTimeout (\r | |
77f00155 | 231 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 232 | )\r |
233 | {\r | |
234 | Tcb->KeepAliveProbes++;\r | |
235 | \r | |
236 | //\r | |
237 | // Too many Keep-alive probes, drop the connection\r | |
238 | //\r | |
239 | if (Tcb->KeepAliveProbes > Tcb->MaxKeepAlive) {\r | |
240 | \r | |
241 | if (EFI_ABORTED == Tcb->Sk->SockError) {\r | |
242 | SOCK_ERROR (Tcb->Sk, EFI_TIMEOUT);\r | |
243 | }\r | |
244 | \r | |
245 | TcpClose (Tcb);\r | |
246 | return ;\r | |
247 | }\r | |
248 | \r | |
249 | TcpSendZeroProbe (Tcb);\r | |
250 | TcpSetKeepaliveTimer (Tcb);\r | |
251 | }\r | |
252 | \r | |
253 | \r | |
254 | /**\r | |
255 | Timeout handler for FIN_WAIT_2 timer.\r | |
256 | \r | |
257 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
258 | \r | |
8a67d61d | 259 | **/\r |
8a67d61d | 260 | VOID\r |
261 | TcpFinwait2Timeout (\r | |
77f00155 | 262 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 263 | )\r |
264 | {\r | |
e48e37fc | 265 | DEBUG ((EFI_D_WARN, "TcpFinwait2Timeout: connection closed "\r |
0e549d5b | 266 | "because FIN_WAIT2 timer timeouts for TCB %p\n", Tcb));\r |
8a67d61d | 267 | \r |
268 | TcpClose (Tcb);\r | |
269 | }\r | |
270 | \r | |
271 | \r | |
272 | /**\r | |
273 | Timeout handler for 2MSL timer.\r | |
274 | \r | |
275 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
276 | \r | |
8a67d61d | 277 | **/\r |
8a67d61d | 278 | VOID\r |
279 | Tcp2MSLTimeout (\r | |
77f00155 | 280 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 281 | )\r |
282 | {\r | |
e48e37fc | 283 | DEBUG ((EFI_D_WARN, "Tcp2MSLTimeout: connection closed "\r |
0e549d5b | 284 | "because TIME_WAIT timer timeouts for TCB %p\n", Tcb));\r |
8a67d61d | 285 | \r |
286 | TcpClose (Tcb);\r | |
287 | }\r | |
288 | \r | |
289 | \r | |
290 | /**\r | |
120db52c | 291 | Update the timer status and the next expire time according to the timers \r |
292 | to expire in a specific future time slot.\r | |
8a67d61d | 293 | \r |
294 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
295 | \r | |
8a67d61d | 296 | **/\r |
8a67d61d | 297 | VOID\r |
298 | TcpUpdateTimer (\r | |
77f00155 | 299 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 300 | )\r |
301 | {\r | |
302 | UINT16 Index;\r | |
303 | \r | |
304 | //\r | |
305 | // Don't use a too large value to init NextExpire\r | |
306 | // since mTcpTick wraps around as sequence no does.\r | |
307 | //\r | |
308 | Tcb->NextExpire = 65535;\r | |
309 | TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON);\r | |
310 | \r | |
311 | for (Index = 0; Index < TCP_TIMER_NUMBER; Index++) {\r | |
312 | \r | |
313 | if (TCP_TIMER_ON (Tcb->EnabledTimer, Index) &&\r | |
314 | TCP_TIME_LT (Tcb->Timer[Index], mTcpTick + Tcb->NextExpire)) {\r | |
315 | \r | |
316 | Tcb->NextExpire = TCP_SUB_TIME (Tcb->Timer[Index], mTcpTick);\r | |
317 | TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON);\r | |
318 | }\r | |
319 | }\r | |
320 | }\r | |
321 | \r | |
322 | \r | |
323 | /**\r | |
324 | Enable a TCP timer.\r | |
325 | \r | |
326 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
327 | @param Timer The index of the timer to be enabled.\r | |
328 | @param TimeOut The timeout value of this timer.\r | |
329 | \r | |
8a67d61d | 330 | **/\r |
331 | VOID\r | |
332 | TcpSetTimer (\r | |
77f00155 | 333 | IN OUT TCP_CB *Tcb,\r |
334 | IN UINT16 Timer,\r | |
335 | IN UINT32 TimeOut\r | |
8a67d61d | 336 | )\r |
337 | {\r | |
338 | TCP_SET_TIMER (Tcb->EnabledTimer, Timer);\r | |
339 | Tcb->Timer[Timer] = mTcpTick + TimeOut;\r | |
340 | \r | |
341 | TcpUpdateTimer (Tcb);\r | |
342 | }\r | |
343 | \r | |
344 | \r | |
345 | /**\r | |
346 | Clear one TCP timer.\r | |
347 | \r | |
348 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
349 | @param Timer The index of the timer to be cleared.\r | |
350 | \r | |
8a67d61d | 351 | **/\r |
352 | VOID\r | |
353 | TcpClearTimer (\r | |
77f00155 | 354 | IN OUT TCP_CB *Tcb,\r |
355 | IN UINT16 Timer\r | |
8a67d61d | 356 | )\r |
357 | {\r | |
358 | TCP_CLEAR_TIMER (Tcb->EnabledTimer, Timer);\r | |
359 | TcpUpdateTimer (Tcb);\r | |
360 | }\r | |
361 | \r | |
362 | \r | |
363 | /**\r | |
364 | Clear all TCP timers.\r | |
365 | \r | |
366 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
367 | \r | |
8a67d61d | 368 | **/\r |
369 | VOID\r | |
370 | TcpClearAllTimer (\r | |
77f00155 | 371 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 372 | )\r |
373 | {\r | |
374 | Tcb->EnabledTimer = 0;\r | |
375 | TcpUpdateTimer (Tcb);\r | |
376 | }\r | |
377 | \r | |
378 | \r | |
379 | /**\r | |
380 | Enable the window prober timer and set the timeout value.\r | |
381 | \r | |
382 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
383 | \r | |
8a67d61d | 384 | **/\r |
385 | VOID\r | |
386 | TcpSetProbeTimer (\r | |
77f00155 | 387 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 388 | )\r |
389 | {\r | |
390 | if (!TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_PROBE)) {\r | |
391 | Tcb->ProbeTime = Tcb->Rto;\r | |
392 | \r | |
393 | } else {\r | |
394 | Tcb->ProbeTime <<= 1;\r | |
395 | }\r | |
396 | \r | |
397 | if (Tcb->ProbeTime < TCP_RTO_MIN) {\r | |
398 | \r | |
399 | Tcb->ProbeTime = TCP_RTO_MIN;\r | |
400 | } else if (Tcb->ProbeTime > TCP_RTO_MAX) {\r | |
401 | \r | |
402 | Tcb->ProbeTime = TCP_RTO_MAX;\r | |
403 | }\r | |
404 | \r | |
405 | TcpSetTimer (Tcb, TCP_TIMER_PROBE, Tcb->ProbeTime);\r | |
406 | }\r | |
407 | \r | |
408 | \r | |
409 | /**\r | |
410 | Enable the keepalive timer and set the timeout value.\r | |
411 | \r | |
412 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
413 | \r | |
8a67d61d | 414 | **/\r |
415 | VOID\r | |
416 | TcpSetKeepaliveTimer (\r | |
77f00155 | 417 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 418 | )\r |
419 | {\r | |
420 | if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_KEEPALIVE)) {\r | |
421 | return ;\r | |
422 | \r | |
423 | }\r | |
424 | \r | |
425 | //\r | |
426 | // Set the timer to KeepAliveIdle if either\r | |
427 | // 1. the keepalive timer is off\r | |
428 | // 2. The keepalive timer is on, but the idle\r | |
429 | // is less than KeepAliveIdle, that means the\r | |
430 | // connection is alive since our last probe.\r | |
431 | //\r | |
432 | if (!TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_KEEPALIVE) ||\r | |
433 | (Tcb->Idle < Tcb->KeepAliveIdle)) {\r | |
434 | \r | |
435 | TcpSetTimer (Tcb, TCP_TIMER_KEEPALIVE, Tcb->KeepAliveIdle);\r | |
436 | Tcb->KeepAliveProbes = 0;\r | |
437 | \r | |
438 | } else {\r | |
439 | \r | |
440 | TcpSetTimer (Tcb, TCP_TIMER_KEEPALIVE, Tcb->KeepAlivePeriod);\r | |
441 | }\r | |
442 | }\r | |
443 | \r | |
444 | \r | |
445 | /**\r | |
446 | Backoff the RTO.\r | |
447 | \r | |
448 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
449 | \r | |
8a67d61d | 450 | **/\r |
451 | VOID\r | |
452 | TcpBackoffRto (\r | |
77f00155 | 453 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 454 | )\r |
455 | {\r | |
456 | //\r | |
457 | // Fold the RTT estimate if too many times, the estimate\r | |
458 | // may be wrong, fold it. So the next time a valid\r | |
459 | // measurement is sampled, we can start fresh.\r | |
460 | //\r | |
85511ddf | 461 | if ((Tcb->LossTimes >= TCP_FOLD_RTT) && (Tcb->SRtt != 0)) {\r |
8a67d61d | 462 | Tcb->RttVar += Tcb->SRtt >> 2;\r |
463 | Tcb->SRtt = 0;\r | |
464 | }\r | |
465 | \r | |
466 | Tcb->Rto <<= 1;\r | |
467 | \r | |
468 | if (Tcb->Rto < TCP_RTO_MIN) {\r | |
469 | \r | |
470 | Tcb->Rto = TCP_RTO_MIN;\r | |
471 | } else if (Tcb->Rto > TCP_RTO_MAX) {\r | |
472 | \r | |
473 | Tcb->Rto = TCP_RTO_MAX;\r | |
474 | }\r | |
475 | }\r | |
476 | \r | |
477 | \r | |
478 | /**\r | |
479 | Heart beat timer handler.\r | |
480 | \r | |
120db52c | 481 | @param Context Context of the timer event, ignored.\r |
8a67d61d | 482 | \r |
483 | **/\r | |
484 | VOID\r | |
485 | EFIAPI\r | |
36ee91ca | 486 | TcpTickingDpc (\r |
8a67d61d | 487 | IN VOID *Context\r |
488 | )\r | |
489 | {\r | |
e48e37fc | 490 | LIST_ENTRY *Entry;\r |
491 | LIST_ENTRY *Next;\r | |
8a67d61d | 492 | TCP_CB *Tcb;\r |
493 | INT16 Index;\r | |
494 | \r | |
495 | mTcpTick++;\r | |
496 | mTcpGlobalIss += 100;\r | |
497 | \r | |
498 | //\r | |
499 | // Don't use LIST_FOR_EACH, which isn't delete safe.\r | |
500 | //\r | |
501 | for (Entry = mTcpRunQue.ForwardLink; Entry != &mTcpRunQue; Entry = Next) {\r | |
502 | \r | |
503 | Next = Entry->ForwardLink;\r | |
504 | \r | |
505 | Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
506 | \r | |
507 | if (Tcb->State == TCP_CLOSED) {\r | |
508 | continue;\r | |
509 | }\r | |
510 | //\r | |
511 | // The connection is doing RTT measurement.\r | |
512 | //\r | |
513 | if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RTT_ON)) {\r | |
514 | Tcb->RttMeasure++;\r | |
515 | }\r | |
516 | \r | |
517 | Tcb->Idle++;\r | |
518 | \r | |
85511ddf | 519 | if (Tcb->DelayedAck != 0) {\r |
8a67d61d | 520 | TcpSendAck (Tcb);\r |
521 | }\r | |
522 | \r | |
523 | //\r | |
524 | // No timer is active or no timer expired\r | |
525 | //\r | |
526 | if (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON) ||\r | |
527 | ((--Tcb->NextExpire) > 0)) {\r | |
528 | \r | |
529 | continue;\r | |
530 | }\r | |
531 | \r | |
532 | //\r | |
533 | // Call the timeout handler for each expired timer.\r | |
534 | //\r | |
535 | for (Index = 0; Index < TCP_TIMER_NUMBER; Index++) {\r | |
536 | \r | |
537 | if (TCP_TIMER_ON (Tcb->EnabledTimer, Index) &&\r | |
538 | TCP_TIME_LEQ (Tcb->Timer[Index], mTcpTick)) {\r | |
539 | //\r | |
540 | // disable the timer before calling the handler\r | |
541 | // in case the handler enables it again.\r | |
542 | //\r | |
543 | TCP_CLEAR_TIMER (Tcb->EnabledTimer, Index);\r | |
544 | mTcpTimerHandler[Index](Tcb);\r | |
545 | \r | |
546 | //\r | |
547 | // The Tcb may have been deleted by the timer, or\r | |
548 | // no other timer is set.\r | |
549 | //\r | |
550 | if ((Next->BackLink != Entry) ||\r | |
551 | (Tcb->EnabledTimer == 0)) {\r | |
c191cdd1 | 552 | break;\r |
8a67d61d | 553 | }\r |
554 | }\r | |
555 | }\r | |
77f00155 | 556 | \r |
557 | //\r | |
558 | // If the Tcb still exist or some timer is set, update the timer\r | |
559 | //\r | |
c191cdd1 | 560 | if (Index == TCP_TIMER_NUMBER) {\r |
561 | TcpUpdateTimer (Tcb);\r | |
562 | }\r | |
8a67d61d | 563 | }\r |
564 | }\r | |
36ee91ca | 565 | \r |
566 | /**\r | |
567 | Heart beat timer handler, queues the DPC at TPL_CALLBACK.\r | |
568 | \r | |
569 | @param Event Timer event signaled, ignored.\r | |
570 | @param Context Context of the timer event, ignored.\r | |
571 | \r | |
36ee91ca | 572 | **/\r |
573 | VOID\r | |
574 | EFIAPI\r | |
575 | TcpTicking (\r | |
576 | IN EFI_EVENT Event,\r | |
577 | IN VOID *Context\r | |
578 | )\r | |
579 | {\r | |
580 | NetLibQueueDpc (TPL_CALLBACK, TcpTickingDpc, Context);\r | |
581 | }\r | |
582 | \r |