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8a67d61d | 1 | /** @file\r |
dfc1f033 | 2 | TCP timer related functions.\r |
3 | \r | |
ac8cca2a | 4 | Copyright (c) 2005 - 2010, Intel Corporation. All rights reserved.<BR>\r |
e5eed7d3 | 5 | This program and the accompanying materials\r |
8a67d61d | 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 |
ac8cca2a | 215 | Tcb->ProbeTimerOn = FALSE;\r |
8a67d61d | 216 | return ;\r |
217 | }\r | |
218 | \r | |
219 | TcpSendZeroProbe (Tcb);\r | |
220 | TcpSetProbeTimer (Tcb);\r | |
221 | }\r | |
222 | \r | |
223 | \r | |
224 | /**\r | |
225 | Timeout handler for keepalive timer.\r | |
226 | \r | |
227 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
228 | \r | |
8a67d61d | 229 | **/\r |
8a67d61d | 230 | VOID\r |
231 | TcpKeepaliveTimeout (\r | |
77f00155 | 232 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 233 | )\r |
234 | {\r | |
235 | Tcb->KeepAliveProbes++;\r | |
236 | \r | |
237 | //\r | |
238 | // Too many Keep-alive probes, drop the connection\r | |
239 | //\r | |
240 | if (Tcb->KeepAliveProbes > Tcb->MaxKeepAlive) {\r | |
241 | \r | |
242 | if (EFI_ABORTED == Tcb->Sk->SockError) {\r | |
243 | SOCK_ERROR (Tcb->Sk, EFI_TIMEOUT);\r | |
244 | }\r | |
245 | \r | |
246 | TcpClose (Tcb);\r | |
247 | return ;\r | |
248 | }\r | |
249 | \r | |
250 | TcpSendZeroProbe (Tcb);\r | |
251 | TcpSetKeepaliveTimer (Tcb);\r | |
252 | }\r | |
253 | \r | |
254 | \r | |
255 | /**\r | |
256 | Timeout handler for FIN_WAIT_2 timer.\r | |
257 | \r | |
258 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
259 | \r | |
8a67d61d | 260 | **/\r |
8a67d61d | 261 | VOID\r |
262 | TcpFinwait2Timeout (\r | |
77f00155 | 263 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 264 | )\r |
265 | {\r | |
e48e37fc | 266 | DEBUG ((EFI_D_WARN, "TcpFinwait2Timeout: connection closed "\r |
0e549d5b | 267 | "because FIN_WAIT2 timer timeouts for TCB %p\n", Tcb));\r |
8a67d61d | 268 | \r |
269 | TcpClose (Tcb);\r | |
270 | }\r | |
271 | \r | |
272 | \r | |
273 | /**\r | |
274 | Timeout handler for 2MSL timer.\r | |
275 | \r | |
276 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
277 | \r | |
8a67d61d | 278 | **/\r |
8a67d61d | 279 | VOID\r |
280 | Tcp2MSLTimeout (\r | |
77f00155 | 281 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 282 | )\r |
283 | {\r | |
e48e37fc | 284 | DEBUG ((EFI_D_WARN, "Tcp2MSLTimeout: connection closed "\r |
0e549d5b | 285 | "because TIME_WAIT timer timeouts for TCB %p\n", Tcb));\r |
8a67d61d | 286 | \r |
287 | TcpClose (Tcb);\r | |
288 | }\r | |
289 | \r | |
290 | \r | |
291 | /**\r | |
120db52c | 292 | Update the timer status and the next expire time according to the timers \r |
293 | to expire in a specific future time slot.\r | |
8a67d61d | 294 | \r |
295 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
296 | \r | |
8a67d61d | 297 | **/\r |
8a67d61d | 298 | VOID\r |
299 | TcpUpdateTimer (\r | |
77f00155 | 300 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 301 | )\r |
302 | {\r | |
303 | UINT16 Index;\r | |
304 | \r | |
305 | //\r | |
306 | // Don't use a too large value to init NextExpire\r | |
307 | // since mTcpTick wraps around as sequence no does.\r | |
308 | //\r | |
309 | Tcb->NextExpire = 65535;\r | |
310 | TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON);\r | |
311 | \r | |
312 | for (Index = 0; Index < TCP_TIMER_NUMBER; Index++) {\r | |
313 | \r | |
314 | if (TCP_TIMER_ON (Tcb->EnabledTimer, Index) &&\r | |
315 | TCP_TIME_LT (Tcb->Timer[Index], mTcpTick + Tcb->NextExpire)) {\r | |
316 | \r | |
317 | Tcb->NextExpire = TCP_SUB_TIME (Tcb->Timer[Index], mTcpTick);\r | |
318 | TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON);\r | |
319 | }\r | |
320 | }\r | |
321 | }\r | |
322 | \r | |
323 | \r | |
324 | /**\r | |
325 | Enable a TCP timer.\r | |
326 | \r | |
327 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
328 | @param Timer The index of the timer to be enabled.\r | |
329 | @param TimeOut The timeout value of this timer.\r | |
330 | \r | |
8a67d61d | 331 | **/\r |
332 | VOID\r | |
333 | TcpSetTimer (\r | |
77f00155 | 334 | IN OUT TCP_CB *Tcb,\r |
335 | IN UINT16 Timer,\r | |
336 | IN UINT32 TimeOut\r | |
8a67d61d | 337 | )\r |
338 | {\r | |
339 | TCP_SET_TIMER (Tcb->EnabledTimer, Timer);\r | |
340 | Tcb->Timer[Timer] = mTcpTick + TimeOut;\r | |
341 | \r | |
342 | TcpUpdateTimer (Tcb);\r | |
343 | }\r | |
344 | \r | |
345 | \r | |
346 | /**\r | |
347 | Clear one TCP timer.\r | |
348 | \r | |
349 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
350 | @param Timer The index of the timer to be cleared.\r | |
351 | \r | |
8a67d61d | 352 | **/\r |
353 | VOID\r | |
354 | TcpClearTimer (\r | |
77f00155 | 355 | IN OUT TCP_CB *Tcb,\r |
356 | IN UINT16 Timer\r | |
8a67d61d | 357 | )\r |
358 | {\r | |
359 | TCP_CLEAR_TIMER (Tcb->EnabledTimer, Timer);\r | |
360 | TcpUpdateTimer (Tcb);\r | |
361 | }\r | |
362 | \r | |
363 | \r | |
364 | /**\r | |
365 | Clear all TCP timers.\r | |
366 | \r | |
367 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
368 | \r | |
8a67d61d | 369 | **/\r |
370 | VOID\r | |
371 | TcpClearAllTimer (\r | |
77f00155 | 372 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 373 | )\r |
374 | {\r | |
375 | Tcb->EnabledTimer = 0;\r | |
376 | TcpUpdateTimer (Tcb);\r | |
377 | }\r | |
378 | \r | |
379 | \r | |
380 | /**\r | |
381 | Enable the window prober timer and set the timeout value.\r | |
382 | \r | |
383 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
384 | \r | |
8a67d61d | 385 | **/\r |
386 | VOID\r | |
387 | TcpSetProbeTimer (\r | |
77f00155 | 388 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 389 | )\r |
390 | {\r | |
ac8cca2a | 391 | if (!Tcb->ProbeTimerOn) {\r |
392 | Tcb->ProbeTime = Tcb->Rto;\r | |
393 | Tcb->ProbeTimerOn = TRUE;\r | |
8a67d61d | 394 | \r |
395 | } else {\r | |
396 | Tcb->ProbeTime <<= 1;\r | |
397 | }\r | |
398 | \r | |
399 | if (Tcb->ProbeTime < TCP_RTO_MIN) {\r | |
400 | \r | |
401 | Tcb->ProbeTime = TCP_RTO_MIN;\r | |
402 | } else if (Tcb->ProbeTime > TCP_RTO_MAX) {\r | |
403 | \r | |
404 | Tcb->ProbeTime = TCP_RTO_MAX;\r | |
405 | }\r | |
406 | \r | |
407 | TcpSetTimer (Tcb, TCP_TIMER_PROBE, Tcb->ProbeTime);\r | |
408 | }\r | |
409 | \r | |
410 | \r | |
411 | /**\r | |
412 | Enable the keepalive timer and set the timeout value.\r | |
413 | \r | |
414 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
415 | \r | |
8a67d61d | 416 | **/\r |
417 | VOID\r | |
418 | TcpSetKeepaliveTimer (\r | |
77f00155 | 419 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 420 | )\r |
421 | {\r | |
422 | if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_KEEPALIVE)) {\r | |
423 | return ;\r | |
424 | \r | |
425 | }\r | |
426 | \r | |
427 | //\r | |
428 | // Set the timer to KeepAliveIdle if either\r | |
429 | // 1. the keepalive timer is off\r | |
430 | // 2. The keepalive timer is on, but the idle\r | |
431 | // is less than KeepAliveIdle, that means the\r | |
432 | // connection is alive since our last probe.\r | |
433 | //\r | |
434 | if (!TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_KEEPALIVE) ||\r | |
435 | (Tcb->Idle < Tcb->KeepAliveIdle)) {\r | |
436 | \r | |
437 | TcpSetTimer (Tcb, TCP_TIMER_KEEPALIVE, Tcb->KeepAliveIdle);\r | |
438 | Tcb->KeepAliveProbes = 0;\r | |
439 | \r | |
440 | } else {\r | |
441 | \r | |
442 | TcpSetTimer (Tcb, TCP_TIMER_KEEPALIVE, Tcb->KeepAlivePeriod);\r | |
443 | }\r | |
444 | }\r | |
445 | \r | |
446 | \r | |
447 | /**\r | |
448 | Backoff the RTO.\r | |
449 | \r | |
450 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
451 | \r | |
8a67d61d | 452 | **/\r |
453 | VOID\r | |
454 | TcpBackoffRto (\r | |
77f00155 | 455 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 456 | )\r |
457 | {\r | |
458 | //\r | |
459 | // Fold the RTT estimate if too many times, the estimate\r | |
460 | // may be wrong, fold it. So the next time a valid\r | |
461 | // measurement is sampled, we can start fresh.\r | |
462 | //\r | |
85511ddf | 463 | if ((Tcb->LossTimes >= TCP_FOLD_RTT) && (Tcb->SRtt != 0)) {\r |
8a67d61d | 464 | Tcb->RttVar += Tcb->SRtt >> 2;\r |
465 | Tcb->SRtt = 0;\r | |
466 | }\r | |
467 | \r | |
468 | Tcb->Rto <<= 1;\r | |
469 | \r | |
470 | if (Tcb->Rto < TCP_RTO_MIN) {\r | |
471 | \r | |
472 | Tcb->Rto = TCP_RTO_MIN;\r | |
473 | } else if (Tcb->Rto > TCP_RTO_MAX) {\r | |
474 | \r | |
475 | Tcb->Rto = TCP_RTO_MAX;\r | |
476 | }\r | |
477 | }\r | |
478 | \r | |
479 | \r | |
480 | /**\r | |
481 | Heart beat timer handler.\r | |
482 | \r | |
120db52c | 483 | @param Context Context of the timer event, ignored.\r |
8a67d61d | 484 | \r |
485 | **/\r | |
486 | VOID\r | |
487 | EFIAPI\r | |
36ee91ca | 488 | TcpTickingDpc (\r |
8a67d61d | 489 | IN VOID *Context\r |
490 | )\r | |
491 | {\r | |
e48e37fc | 492 | LIST_ENTRY *Entry;\r |
493 | LIST_ENTRY *Next;\r | |
8a67d61d | 494 | TCP_CB *Tcb;\r |
495 | INT16 Index;\r | |
496 | \r | |
497 | mTcpTick++;\r | |
498 | mTcpGlobalIss += 100;\r | |
499 | \r | |
500 | //\r | |
501 | // Don't use LIST_FOR_EACH, which isn't delete safe.\r | |
502 | //\r | |
503 | for (Entry = mTcpRunQue.ForwardLink; Entry != &mTcpRunQue; Entry = Next) {\r | |
504 | \r | |
505 | Next = Entry->ForwardLink;\r | |
506 | \r | |
507 | Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
508 | \r | |
509 | if (Tcb->State == TCP_CLOSED) {\r | |
510 | continue;\r | |
511 | }\r | |
512 | //\r | |
513 | // The connection is doing RTT measurement.\r | |
514 | //\r | |
515 | if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RTT_ON)) {\r | |
516 | Tcb->RttMeasure++;\r | |
517 | }\r | |
518 | \r | |
519 | Tcb->Idle++;\r | |
520 | \r | |
85511ddf | 521 | if (Tcb->DelayedAck != 0) {\r |
8a67d61d | 522 | TcpSendAck (Tcb);\r |
523 | }\r | |
524 | \r | |
525 | //\r | |
526 | // No timer is active or no timer expired\r | |
527 | //\r | |
528 | if (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON) ||\r | |
529 | ((--Tcb->NextExpire) > 0)) {\r | |
530 | \r | |
531 | continue;\r | |
532 | }\r | |
533 | \r | |
534 | //\r | |
535 | // Call the timeout handler for each expired timer.\r | |
536 | //\r | |
537 | for (Index = 0; Index < TCP_TIMER_NUMBER; Index++) {\r | |
538 | \r | |
539 | if (TCP_TIMER_ON (Tcb->EnabledTimer, Index) &&\r | |
540 | TCP_TIME_LEQ (Tcb->Timer[Index], mTcpTick)) {\r | |
541 | //\r | |
542 | // disable the timer before calling the handler\r | |
543 | // in case the handler enables it again.\r | |
544 | //\r | |
545 | TCP_CLEAR_TIMER (Tcb->EnabledTimer, Index);\r | |
546 | mTcpTimerHandler[Index](Tcb);\r | |
547 | \r | |
548 | //\r | |
549 | // The Tcb may have been deleted by the timer, or\r | |
550 | // no other timer is set.\r | |
551 | //\r | |
552 | if ((Next->BackLink != Entry) ||\r | |
553 | (Tcb->EnabledTimer == 0)) {\r | |
c191cdd1 | 554 | break;\r |
8a67d61d | 555 | }\r |
556 | }\r | |
557 | }\r | |
77f00155 | 558 | \r |
559 | //\r | |
560 | // If the Tcb still exist or some timer is set, update the timer\r | |
561 | //\r | |
c191cdd1 | 562 | if (Index == TCP_TIMER_NUMBER) {\r |
563 | TcpUpdateTimer (Tcb);\r | |
564 | }\r | |
8a67d61d | 565 | }\r |
566 | }\r | |
36ee91ca | 567 | \r |
568 | /**\r | |
569 | Heart beat timer handler, queues the DPC at TPL_CALLBACK.\r | |
570 | \r | |
571 | @param Event Timer event signaled, ignored.\r | |
572 | @param Context Context of the timer event, ignored.\r | |
573 | \r | |
36ee91ca | 574 | **/\r |
575 | VOID\r | |
576 | EFIAPI\r | |
577 | TcpTicking (\r | |
578 | IN EFI_EVENT Event,\r | |
579 | IN VOID *Context\r | |
580 | )\r | |
581 | {\r | |
d8d26fb2 | 582 | QueueDpc (TPL_CALLBACK, TcpTickingDpc, Context);\r |
36ee91ca | 583 | }\r |
584 | \r |