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1 | /** @file\r | |
2 | TCP timer related functions.\r | |
3 | \r | |
4 | Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>\r | |
5 | \r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php.\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include "TcpMain.h"\r | |
17 | \r | |
18 | UINT32 mTcpTick = 1000;\r | |
19 | \r | |
20 | /**\r | |
21 | Connect timeout handler.\r | |
22 | \r | |
23 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
24 | \r | |
25 | **/\r | |
26 | VOID\r | |
27 | TcpConnectTimeout (\r | |
28 | IN OUT TCP_CB *Tcb\r | |
29 | );\r | |
30 | \r | |
31 | /**\r | |
32 | Timeout handler for TCP retransmission timer.\r | |
33 | \r | |
34 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
35 | \r | |
36 | **/\r | |
37 | VOID\r | |
38 | TcpRexmitTimeout (\r | |
39 | IN OUT TCP_CB *Tcb\r | |
40 | );\r | |
41 | \r | |
42 | /**\r | |
43 | Timeout handler for window probe timer.\r | |
44 | \r | |
45 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
46 | \r | |
47 | **/\r | |
48 | VOID\r | |
49 | TcpProbeTimeout (\r | |
50 | IN OUT TCP_CB *Tcb\r | |
51 | );\r | |
52 | \r | |
53 | /**\r | |
54 | Timeout handler for keepalive timer.\r | |
55 | \r | |
56 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
57 | \r | |
58 | **/\r | |
59 | VOID\r | |
60 | TcpKeepaliveTimeout (\r | |
61 | IN OUT TCP_CB *Tcb\r | |
62 | );\r | |
63 | \r | |
64 | /**\r | |
65 | Timeout handler for FIN_WAIT_2 timer.\r | |
66 | \r | |
67 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
68 | \r | |
69 | **/\r | |
70 | VOID\r | |
71 | TcpFinwait2Timeout (\r | |
72 | IN OUT TCP_CB *Tcb\r | |
73 | );\r | |
74 | \r | |
75 | /**\r | |
76 | Timeout handler for 2MSL timer.\r | |
77 | \r | |
78 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
79 | \r | |
80 | **/\r | |
81 | VOID\r | |
82 | Tcp2MSLTimeout (\r | |
83 | IN OUT TCP_CB *Tcb\r | |
84 | );\r | |
85 | \r | |
86 | TCP_TIMER_HANDLER mTcpTimerHandler[TCP_TIMER_NUMBER] = {\r | |
87 | TcpConnectTimeout,\r | |
88 | TcpRexmitTimeout,\r | |
89 | TcpProbeTimeout,\r | |
90 | TcpKeepaliveTimeout,\r | |
91 | TcpFinwait2Timeout,\r | |
92 | Tcp2MSLTimeout,\r | |
93 | };\r | |
94 | \r | |
95 | /**\r | |
96 | Close the TCP connection.\r | |
97 | \r | |
98 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
99 | \r | |
100 | **/\r | |
101 | VOID\r | |
102 | TcpClose (\r | |
103 | IN OUT TCP_CB *Tcb\r | |
104 | )\r | |
105 | {\r | |
106 | NetbufFreeList (&Tcb->SndQue);\r | |
107 | NetbufFreeList (&Tcb->RcvQue);\r | |
108 | \r | |
109 | TcpSetState (Tcb, TCP_CLOSED);\r | |
110 | }\r | |
111 | \r | |
112 | /**\r | |
113 | Backoff the RTO.\r | |
114 | \r | |
115 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
116 | \r | |
117 | **/\r | |
118 | VOID\r | |
119 | TcpBackoffRto (\r | |
120 | IN OUT TCP_CB *Tcb\r | |
121 | )\r | |
122 | {\r | |
123 | //\r | |
124 | // Fold the RTT estimate if too many times, the estimate\r | |
125 | // may be wrong, fold it. So the next time a valid\r | |
126 | // measurement is sampled, we can start fresh.\r | |
127 | //\r | |
128 | if ((Tcb->LossTimes >= TCP_FOLD_RTT) && (Tcb->SRtt != 0)) {\r | |
129 | Tcb->RttVar += Tcb->SRtt >> 2;\r | |
130 | Tcb->SRtt = 0;\r | |
131 | }\r | |
132 | \r | |
133 | Tcb->Rto <<= 1;\r | |
134 | \r | |
135 | if (Tcb->Rto < TCP_RTO_MIN) {\r | |
136 | \r | |
137 | Tcb->Rto = TCP_RTO_MIN;\r | |
138 | } else if (Tcb->Rto > TCP_RTO_MAX) {\r | |
139 | \r | |
140 | Tcb->Rto = TCP_RTO_MAX;\r | |
141 | }\r | |
142 | }\r | |
143 | \r | |
144 | /**\r | |
145 | Connect timeout handler.\r | |
146 | \r | |
147 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
148 | \r | |
149 | **/\r | |
150 | VOID\r | |
151 | TcpConnectTimeout (\r | |
152 | IN OUT TCP_CB *Tcb\r | |
153 | )\r | |
154 | {\r | |
155 | if (!TCP_CONNECTED (Tcb->State)) {\r | |
156 | DEBUG (\r | |
157 | (EFI_D_ERROR,\r | |
158 | "TcpConnectTimeout: connection closed because conenction timer timeout for TCB %p\n",\r | |
159 | Tcb)\r | |
160 | );\r | |
161 | \r | |
162 | if (EFI_ABORTED == Tcb->Sk->SockError) {\r | |
163 | SOCK_ERROR (Tcb->Sk, EFI_TIMEOUT);\r | |
164 | }\r | |
165 | \r | |
166 | if (TCP_SYN_RCVD == Tcb->State) {\r | |
167 | DEBUG (\r | |
168 | (EFI_D_WARN,\r | |
169 | "TcpConnectTimeout: send reset because connection timer timeout for TCB %p\n",\r | |
170 | Tcb)\r | |
171 | );\r | |
172 | \r | |
173 | TcpResetConnection (Tcb);\r | |
174 | \r | |
175 | }\r | |
176 | \r | |
177 | TcpClose (Tcb);\r | |
178 | }\r | |
179 | }\r | |
180 | \r | |
181 | \r | |
182 | /**\r | |
183 | Timeout handler for TCP retransmission timer.\r | |
184 | \r | |
185 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
186 | \r | |
187 | **/\r | |
188 | VOID\r | |
189 | TcpRexmitTimeout (\r | |
190 | IN OUT TCP_CB *Tcb\r | |
191 | )\r | |
192 | {\r | |
193 | UINT32 FlightSize;\r | |
194 | \r | |
195 | DEBUG (\r | |
196 | (EFI_D_WARN,\r | |
197 | "TcpRexmitTimeout: transmission timeout for TCB %p\n",\r | |
198 | Tcb)\r | |
199 | );\r | |
200 | \r | |
201 | //\r | |
202 | // Set the congestion window. FlightSize is the\r | |
203 | // amount of data that has been sent but not\r | |
204 | // yet ACKed.\r | |
205 | //\r | |
206 | FlightSize = TCP_SUB_SEQ (Tcb->SndNxt, Tcb->SndUna);\r | |
207 | Tcb->Ssthresh = MAX ((UINT32) (2 * Tcb->SndMss), FlightSize / 2);\r | |
208 | \r | |
209 | Tcb->CWnd = Tcb->SndMss;\r | |
210 | Tcb->LossRecover = Tcb->SndNxt;\r | |
211 | \r | |
212 | Tcb->LossTimes++;\r | |
213 | if ((Tcb->LossTimes > Tcb->MaxRexmit) && !TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_CONNECT)) {\r | |
214 | \r | |
215 | DEBUG (\r | |
216 | (EFI_D_ERROR,\r | |
217 | "TcpRexmitTimeout: connection closed because too many timeouts for TCB %p\n",\r | |
218 | Tcb)\r | |
219 | );\r | |
220 | \r | |
221 | if (EFI_ABORTED == Tcb->Sk->SockError) {\r | |
222 | SOCK_ERROR (Tcb->Sk, EFI_TIMEOUT);\r | |
223 | }\r | |
224 | \r | |
225 | TcpClose (Tcb);\r | |
226 | return ;\r | |
227 | }\r | |
228 | \r | |
229 | TcpBackoffRto (Tcb);\r | |
230 | TcpRetransmit (Tcb, Tcb->SndUna);\r | |
231 | TcpSetTimer (Tcb, TCP_TIMER_REXMIT, Tcb->Rto);\r | |
232 | \r | |
233 | Tcb->CongestState = TCP_CONGEST_LOSS;\r | |
234 | \r | |
235 | TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_RTT_ON);\r | |
236 | }\r | |
237 | \r | |
238 | /**\r | |
239 | Timeout handler for window probe timer.\r | |
240 | \r | |
241 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
242 | \r | |
243 | **/\r | |
244 | VOID\r | |
245 | TcpProbeTimeout (\r | |
246 | IN OUT TCP_CB *Tcb\r | |
247 | )\r | |
248 | {\r | |
249 | //\r | |
250 | // This is the timer for sender's SWSA. RFC1122 requires\r | |
251 | // a timer set for sender's SWSA, and suggest combine it\r | |
252 | // with window probe timer. If data is sent, don't set\r | |
253 | // the probe timer, since retransmit timer is on.\r | |
254 | //\r | |
255 | if ((TcpDataToSend (Tcb, 1) != 0) && (TcpToSendData (Tcb, 1) > 0)) {\r | |
256 | \r | |
257 | ASSERT (TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_REXMIT) != 0);\r | |
258 | Tcb->ProbeTimerOn = FALSE;\r | |
259 | return ;\r | |
260 | }\r | |
261 | \r | |
262 | TcpSendZeroProbe (Tcb);\r | |
263 | TcpSetProbeTimer (Tcb);\r | |
264 | }\r | |
265 | \r | |
266 | /**\r | |
267 | Timeout handler for keepalive timer.\r | |
268 | \r | |
269 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
270 | \r | |
271 | **/\r | |
272 | VOID\r | |
273 | TcpKeepaliveTimeout (\r | |
274 | IN OUT TCP_CB *Tcb\r | |
275 | )\r | |
276 | {\r | |
277 | Tcb->KeepAliveProbes++;\r | |
278 | \r | |
279 | //\r | |
280 | // Too many Keep-alive probes, drop the connection\r | |
281 | //\r | |
282 | if (Tcb->KeepAliveProbes > Tcb->MaxKeepAlive) {\r | |
283 | \r | |
284 | if (EFI_ABORTED == Tcb->Sk->SockError) {\r | |
285 | SOCK_ERROR (Tcb->Sk, EFI_TIMEOUT);\r | |
286 | }\r | |
287 | \r | |
288 | TcpClose (Tcb);\r | |
289 | return ;\r | |
290 | }\r | |
291 | \r | |
292 | TcpSendZeroProbe (Tcb);\r | |
293 | TcpSetKeepaliveTimer (Tcb);\r | |
294 | }\r | |
295 | \r | |
296 | /**\r | |
297 | Timeout handler for FIN_WAIT_2 timer.\r | |
298 | \r | |
299 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
300 | \r | |
301 | **/\r | |
302 | VOID\r | |
303 | TcpFinwait2Timeout (\r | |
304 | IN OUT TCP_CB *Tcb\r | |
305 | )\r | |
306 | {\r | |
307 | DEBUG (\r | |
308 | (EFI_D_WARN,\r | |
309 | "TcpFinwait2Timeout: connection closed because FIN_WAIT2 timer timeouts for TCB %p\n",\r | |
310 | Tcb)\r | |
311 | );\r | |
312 | \r | |
313 | TcpClose (Tcb);\r | |
314 | }\r | |
315 | \r | |
316 | /**\r | |
317 | Timeout handler for 2MSL timer.\r | |
318 | \r | |
319 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
320 | \r | |
321 | **/\r | |
322 | VOID\r | |
323 | Tcp2MSLTimeout (\r | |
324 | IN OUT TCP_CB *Tcb\r | |
325 | )\r | |
326 | {\r | |
327 | DEBUG (\r | |
328 | (EFI_D_WARN,\r | |
329 | "Tcp2MSLTimeout: connection closed because TIME_WAIT timer timeouts for TCB %p\n",\r | |
330 | Tcb)\r | |
331 | );\r | |
332 | \r | |
333 | TcpClose (Tcb);\r | |
334 | }\r | |
335 | \r | |
336 | /**\r | |
337 | Update the timer status and the next expire time according to the timers\r | |
338 | to expire in a specific future time slot.\r | |
339 | \r | |
340 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
341 | \r | |
342 | **/\r | |
343 | VOID\r | |
344 | TcpUpdateTimer (\r | |
345 | IN OUT TCP_CB *Tcb\r | |
346 | )\r | |
347 | {\r | |
348 | UINT16 Index;\r | |
349 | \r | |
350 | //\r | |
351 | // Don't use a too large value to init NextExpire\r | |
352 | // since mTcpTick wraps around as sequence no does.\r | |
353 | //\r | |
354 | Tcb->NextExpire = TCP_EXPIRE_TIME;\r | |
355 | TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON);\r | |
356 | \r | |
357 | for (Index = 0; Index < TCP_TIMER_NUMBER; Index++) {\r | |
358 | \r | |
359 | if (TCP_TIMER_ON (Tcb->EnabledTimer, Index) &&\r | |
360 | TCP_TIME_LT (Tcb->Timer[Index], mTcpTick + Tcb->NextExpire)\r | |
361 | ) {\r | |
362 | \r | |
363 | Tcb->NextExpire = TCP_SUB_TIME (Tcb->Timer[Index], mTcpTick);\r | |
364 | TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON);\r | |
365 | }\r | |
366 | }\r | |
367 | }\r | |
368 | \r | |
369 | /**\r | |
370 | Enable a TCP timer.\r | |
371 | \r | |
372 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
373 | @param[in] Timer The index of the timer to be enabled.\r | |
374 | @param[in] TimeOut The timeout value of this timer.\r | |
375 | \r | |
376 | **/\r | |
377 | VOID\r | |
378 | TcpSetTimer (\r | |
379 | IN OUT TCP_CB *Tcb,\r | |
380 | IN UINT16 Timer,\r | |
381 | IN UINT32 TimeOut\r | |
382 | )\r | |
383 | {\r | |
384 | TCP_SET_TIMER (Tcb->EnabledTimer, Timer);\r | |
385 | Tcb->Timer[Timer] = mTcpTick + TimeOut;\r | |
386 | \r | |
387 | TcpUpdateTimer (Tcb);\r | |
388 | }\r | |
389 | \r | |
390 | /**\r | |
391 | Clear one TCP timer.\r | |
392 | \r | |
393 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
394 | @param[in] Timer The index of the timer to be cleared.\r | |
395 | \r | |
396 | **/\r | |
397 | VOID\r | |
398 | TcpClearTimer (\r | |
399 | IN OUT TCP_CB *Tcb,\r | |
400 | IN UINT16 Timer\r | |
401 | )\r | |
402 | {\r | |
403 | TCP_CLEAR_TIMER (Tcb->EnabledTimer, Timer);\r | |
404 | TcpUpdateTimer (Tcb);\r | |
405 | }\r | |
406 | \r | |
407 | /**\r | |
408 | Clear all TCP timers.\r | |
409 | \r | |
410 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
411 | \r | |
412 | **/\r | |
413 | VOID\r | |
414 | TcpClearAllTimer (\r | |
415 | IN OUT TCP_CB *Tcb\r | |
416 | )\r | |
417 | {\r | |
418 | Tcb->EnabledTimer = 0;\r | |
419 | TcpUpdateTimer (Tcb);\r | |
420 | }\r | |
421 | \r | |
422 | /**\r | |
423 | Enable the window prober timer and set the timeout value.\r | |
424 | \r | |
425 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
426 | \r | |
427 | **/\r | |
428 | VOID\r | |
429 | TcpSetProbeTimer (\r | |
430 | IN OUT TCP_CB *Tcb\r | |
431 | )\r | |
432 | {\r | |
433 | if (!Tcb->ProbeTimerOn) {\r | |
434 | Tcb->ProbeTime = Tcb->Rto;\r | |
435 | Tcb->ProbeTimerOn = TRUE;\r | |
436 | \r | |
437 | } else {\r | |
438 | Tcb->ProbeTime <<= 1;\r | |
439 | }\r | |
440 | \r | |
441 | if (Tcb->ProbeTime < TCP_RTO_MIN) {\r | |
442 | \r | |
443 | Tcb->ProbeTime = TCP_RTO_MIN;\r | |
444 | } else if (Tcb->ProbeTime > TCP_RTO_MAX) {\r | |
445 | \r | |
446 | Tcb->ProbeTime = TCP_RTO_MAX;\r | |
447 | }\r | |
448 | \r | |
449 | TcpSetTimer (Tcb, TCP_TIMER_PROBE, Tcb->ProbeTime);\r | |
450 | }\r | |
451 | \r | |
452 | /**\r | |
453 | Enable the keepalive timer and set the timeout value.\r | |
454 | \r | |
455 | @param[in, out] Tcb Pointer to the TCP_CB of this TCP instance.\r | |
456 | \r | |
457 | **/\r | |
458 | VOID\r | |
459 | TcpSetKeepaliveTimer (\r | |
460 | IN OUT TCP_CB *Tcb\r | |
461 | )\r | |
462 | {\r | |
463 | if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_KEEPALIVE)) {\r | |
464 | return ;\r | |
465 | \r | |
466 | }\r | |
467 | \r | |
468 | //\r | |
469 | // Set the timer to KeepAliveIdle if either\r | |
470 | // 1. the keepalive timer is off\r | |
471 | // 2. The keepalive timer is on, but the idle\r | |
472 | // is less than KeepAliveIdle, that means the\r | |
473 | // connection is alive since our last probe.\r | |
474 | //\r | |
475 | if (!TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_KEEPALIVE) ||\r | |
476 | (Tcb->Idle < Tcb->KeepAliveIdle)\r | |
477 | ) {\r | |
478 | \r | |
479 | TcpSetTimer (Tcb, TCP_TIMER_KEEPALIVE, Tcb->KeepAliveIdle);\r | |
480 | Tcb->KeepAliveProbes = 0;\r | |
481 | \r | |
482 | } else {\r | |
483 | \r | |
484 | TcpSetTimer (Tcb, TCP_TIMER_KEEPALIVE, Tcb->KeepAlivePeriod);\r | |
485 | }\r | |
486 | }\r | |
487 | \r | |
488 | /**\r | |
489 | Heart beat timer handler.\r | |
490 | \r | |
491 | @param[in] Context Context of the timer event, ignored.\r | |
492 | \r | |
493 | **/\r | |
494 | VOID\r | |
495 | EFIAPI\r | |
496 | TcpTickingDpc (\r | |
497 | IN VOID *Context\r | |
498 | )\r | |
499 | {\r | |
500 | LIST_ENTRY *Entry;\r | |
501 | LIST_ENTRY *Next;\r | |
502 | TCP_CB *Tcb;\r | |
503 | INT16 Index;\r | |
504 | \r | |
505 | mTcpTick++;\r | |
506 | mTcpGlobalIss += TCP_ISS_INCREMENT_2;\r | |
507 | \r | |
508 | //\r | |
509 | // Don't use LIST_FOR_EACH, which isn't delete safe.\r | |
510 | //\r | |
511 | for (Entry = mTcpRunQue.ForwardLink; Entry != &mTcpRunQue; Entry = Next) {\r | |
512 | \r | |
513 | Next = Entry->ForwardLink;\r | |
514 | \r | |
515 | Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
516 | \r | |
517 | if (Tcb->State == TCP_CLOSED) {\r | |
518 | continue;\r | |
519 | }\r | |
520 | //\r | |
521 | // The connection is doing RTT measurement.\r | |
522 | //\r | |
523 | if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RTT_ON)) {\r | |
524 | Tcb->RttMeasure++;\r | |
525 | }\r | |
526 | \r | |
527 | Tcb->Idle++;\r | |
528 | \r | |
529 | if (Tcb->DelayedAck != 0) {\r | |
530 | TcpSendAck (Tcb);\r | |
531 | }\r | |
532 | \r | |
533 | if (Tcb->IpInfo->IpVersion == IP_VERSION_6 && Tcb->Tick > 0) {\r | |
534 | Tcb->Tick--;\r | |
535 | }\r | |
536 | \r | |
537 | //\r | |
538 | // No timer is active or no timer expired\r | |
539 | //\r | |
540 | if (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON) || ((--Tcb->NextExpire) > 0)) {\r | |
541 | \r | |
542 | continue;\r | |
543 | }\r | |
544 | \r | |
545 | //\r | |
546 | // Call the timeout handler for each expired timer.\r | |
547 | //\r | |
548 | for (Index = 0; Index < TCP_TIMER_NUMBER; Index++) {\r | |
549 | \r | |
550 | if (TCP_TIMER_ON (Tcb->EnabledTimer, Index) && TCP_TIME_LEQ (Tcb->Timer[Index], mTcpTick)) {\r | |
551 | //\r | |
552 | // disable the timer before calling the handler\r | |
553 | // in case the handler enables it again.\r | |
554 | //\r | |
555 | TCP_CLEAR_TIMER (Tcb->EnabledTimer, Index);\r | |
556 | mTcpTimerHandler[Index](Tcb);\r | |
557 | \r | |
558 | //\r | |
559 | // The Tcb may have been deleted by the timer, or\r | |
560 | // no other timer is set.\r | |
561 | //\r | |
562 | if ((Next->BackLink != Entry) || (Tcb->EnabledTimer == 0)) {\r | |
563 | break;\r | |
564 | }\r | |
565 | }\r | |
566 | }\r | |
567 | \r | |
568 | //\r | |
569 | // If the Tcb still exist or some timer is set, update the timer\r | |
570 | //\r | |
571 | if (Index == TCP_TIMER_NUMBER) {\r | |
572 | TcpUpdateTimer (Tcb);\r | |
573 | }\r | |
574 | }\r | |
575 | }\r | |
576 | \r | |
577 | /**\r | |
578 | Heart beat timer handler, queues the DPC at TPL_CALLBACK.\r | |
579 | \r | |
580 | @param[in] Event Timer event signaled, ignored.\r | |
581 | @param[in] Context Context of the timer event, ignored.\r | |
582 | \r | |
583 | **/\r | |
584 | VOID\r | |
585 | EFIAPI\r | |
586 | TcpTicking (\r | |
587 | IN EFI_EVENT Event,\r | |
588 | IN VOID *Context\r | |
589 | )\r | |
590 | {\r | |
591 | QueueDpc (TPL_CALLBACK, TcpTickingDpc, Context);\r | |
592 | }\r | |
593 | \r |