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8a67d61d | 1 | /** @file\r |
2 | \r | |
3 | Copyright (c) 2005 - 2006, Intel Corporation\r | |
4 | All rights reserved. This program and the accompanying materials\r | |
5 | are licensed and made available under the terms and conditions of the BSD License\r | |
6 | which accompanies this distribution. The full text of the license may be found at\r | |
7 | http://opensource.org/licenses/bsd-license.php\r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | Tcp4Misc.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | Misc support routines for tcp.\r | |
19 | \r | |
20 | \r | |
21 | **/\r | |
22 | \r | |
23 | \r | |
24 | #include "Tcp4Main.h"\r | |
25 | \r | |
26 | NET_LIST_ENTRY mTcpRunQue = {\r | |
27 | &mTcpRunQue,\r | |
28 | &mTcpRunQue\r | |
29 | };\r | |
30 | \r | |
31 | NET_LIST_ENTRY mTcpListenQue = {\r | |
32 | &mTcpListenQue,\r | |
33 | &mTcpListenQue\r | |
34 | };\r | |
35 | \r | |
36 | TCP_SEQNO mTcpGlobalIss = 0x4d7e980b;\r | |
37 | \r | |
38 | STATIC CHAR16 *mTcpStateName[] = {\r | |
39 | L"TCP_CLOSED",\r | |
40 | L"TCP_LISTEN",\r | |
41 | L"TCP_SYN_SENT",\r | |
42 | L"TCP_SYN_RCVD",\r | |
43 | L"TCP_ESTABLISHED",\r | |
44 | L"TCP_FIN_WAIT_1",\r | |
45 | L"TCP_FIN_WAIT_2",\r | |
46 | L"TCP_CLOSING",\r | |
47 | L"TCP_TIME_WAIT",\r | |
48 | L"TCP_CLOSE_WAIT",\r | |
49 | L"TCP_LAST_ACK"\r | |
50 | };\r | |
51 | \r | |
52 | \r | |
53 | /**\r | |
54 | Initialize the Tcb local related members.\r | |
55 | \r | |
56 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
57 | \r | |
58 | @return None\r | |
59 | \r | |
60 | **/\r | |
61 | VOID\r | |
62 | TcpInitTcbLocal (\r | |
63 | IN TCP_CB *Tcb\r | |
64 | )\r | |
65 | {\r | |
66 | //\r | |
67 | // Compute the checksum of the fixed parts of pseudo header\r | |
68 | //\r | |
69 | Tcb->HeadSum = NetPseudoHeadChecksum (\r | |
70 | Tcb->LocalEnd.Ip,\r | |
71 | Tcb->RemoteEnd.Ip,\r | |
72 | 0x06,\r | |
73 | 0\r | |
74 | );\r | |
75 | \r | |
76 | Tcb->Iss = TcpGetIss ();\r | |
77 | Tcb->SndUna = Tcb->Iss;\r | |
78 | Tcb->SndNxt = Tcb->Iss;\r | |
79 | \r | |
80 | Tcb->SndWl2 = Tcb->Iss;\r | |
81 | Tcb->SndWnd = 536;\r | |
82 | \r | |
83 | Tcb->RcvWnd = GET_RCV_BUFFSIZE (Tcb->Sk);\r | |
84 | \r | |
85 | //\r | |
86 | // Fisrt window size is never scaled\r | |
87 | //\r | |
88 | Tcb->RcvWndScale = 0;\r | |
89 | }\r | |
90 | \r | |
91 | \r | |
92 | /**\r | |
93 | Initialize the peer related members.\r | |
94 | \r | |
95 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
96 | @param Seg Pointer to the segment that contains the peer's\r | |
97 | intial info.\r | |
98 | @param Opt Pointer to the options announced by the peer.\r | |
99 | \r | |
100 | @return None\r | |
101 | \r | |
102 | **/\r | |
103 | VOID\r | |
104 | TcpInitTcbPeer (\r | |
105 | IN TCP_CB *Tcb,\r | |
106 | IN TCP_SEG *Seg,\r | |
107 | IN TCP_OPTION *Opt\r | |
108 | )\r | |
109 | {\r | |
110 | UINT16 RcvMss;\r | |
111 | \r | |
112 | ASSERT (Tcb && Seg && Opt);\r | |
113 | ASSERT (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN));\r | |
114 | \r | |
115 | Tcb->SndWnd = Seg->Wnd;\r | |
116 | Tcb->SndWndMax = Tcb->SndWnd;\r | |
117 | Tcb->SndWl1 = Seg->Seq;\r | |
118 | \r | |
119 | if (TCP_FLG_ON (Seg->Flag, TCP_FLG_ACK)) {\r | |
120 | Tcb->SndWl2 = Seg->Ack;\r | |
121 | } else {\r | |
122 | Tcb->SndWl2 = Tcb->Iss + 1;\r | |
123 | }\r | |
124 | \r | |
125 | if (TCP_FLG_ON (Opt->Flag, TCP_OPTION_RCVD_MSS)) {\r | |
4eb65aff | 126 | Tcb->SndMss = (UINT16) NET_MAX (64, Opt->Mss);\r |
8a67d61d | 127 | \r |
128 | RcvMss = TcpGetRcvMss (Tcb->Sk);\r | |
129 | if (Tcb->SndMss > RcvMss) {\r | |
130 | Tcb->SndMss = RcvMss;\r | |
131 | }\r | |
132 | \r | |
133 | } else {\r | |
134 | //\r | |
135 | // One end doesn't support MSS option, use default.\r | |
136 | //\r | |
137 | Tcb->RcvMss = 536;\r | |
138 | }\r | |
139 | \r | |
140 | Tcb->CWnd = Tcb->SndMss;\r | |
141 | \r | |
142 | Tcb->Irs = Seg->Seq;\r | |
143 | Tcb->RcvNxt = Tcb->Irs + 1;\r | |
144 | \r | |
145 | Tcb->RcvWl2 = Tcb->RcvNxt;\r | |
146 | \r | |
147 | if (TCP_FLG_ON (Opt->Flag, TCP_OPTION_RCVD_WS) &&\r | |
148 | !TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_WS)) {\r | |
149 | \r | |
150 | Tcb->SndWndScale = Opt->WndScale;\r | |
151 | \r | |
152 | Tcb->RcvWndScale = TcpComputeScale (Tcb);\r | |
153 | TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_RCVD_WS);\r | |
154 | \r | |
155 | } else {\r | |
156 | //\r | |
157 | // One end doesn't support window scale option. use zero.\r | |
158 | //\r | |
159 | Tcb->RcvWndScale = 0;\r | |
160 | }\r | |
161 | \r | |
162 | if (TCP_FLG_ON (Opt->Flag, TCP_OPTION_RCVD_TS) &&\r | |
163 | !TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_TS)) {\r | |
164 | \r | |
165 | TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_SND_TS);\r | |
166 | TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_RCVD_TS);\r | |
167 | \r | |
168 | //\r | |
169 | // Compute the effective SndMss per RFC1122\r | |
170 | // section 4.2.2.6. If timestamp option is\r | |
171 | // enabled, it will always occupy 12 bytes.\r | |
172 | //\r | |
173 | Tcb->SndMss -= TCP_OPTION_TS_ALIGNED_LEN;\r | |
174 | }\r | |
175 | }\r | |
176 | \r | |
177 | \r | |
178 | /**\r | |
179 | Locate a listen TCB that matchs the Local and Remote.\r | |
180 | \r | |
181 | @param Local Pointer to the local (IP, Port).\r | |
182 | @param Remote Pointer to the remote (IP, Port).\r | |
183 | \r | |
184 | @return Pointer to the TCP_CB with the least number of wildcard, if NULL no match is found.\r | |
185 | \r | |
186 | **/\r | |
187 | STATIC\r | |
188 | TCP_CB *\r | |
189 | TcpLocateListenTcb (\r | |
190 | IN TCP_PEER *Local,\r | |
191 | IN TCP_PEER *Remote\r | |
192 | )\r | |
193 | {\r | |
194 | NET_LIST_ENTRY *Entry;\r | |
195 | TCP_CB *Node;\r | |
196 | TCP_CB *Match;\r | |
197 | INTN Last;\r | |
198 | INTN Cur;\r | |
199 | \r | |
200 | Last = 4;\r | |
201 | Match = NULL;\r | |
202 | \r | |
203 | NET_LIST_FOR_EACH (Entry, &mTcpListenQue) {\r | |
204 | Node = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
205 | \r | |
206 | if ((Local->Port != Node->LocalEnd.Port) ||\r | |
207 | !TCP_PEER_MATCH (Remote, &Node->RemoteEnd) ||\r | |
208 | !TCP_PEER_MATCH (Local, &Node->LocalEnd)\r | |
209 | ) {\r | |
210 | \r | |
211 | continue;\r | |
212 | }\r | |
213 | \r | |
214 | //\r | |
215 | // Compute the number of wildcard\r | |
216 | //\r | |
217 | Cur = 0;\r | |
218 | if (Node->RemoteEnd.Ip == 0) {\r | |
219 | Cur++;\r | |
220 | }\r | |
221 | \r | |
222 | if (Node->RemoteEnd.Port == 0) {\r | |
223 | Cur++;\r | |
224 | }\r | |
225 | \r | |
226 | if (Node->LocalEnd.Ip == 0) {\r | |
227 | Cur++;\r | |
228 | }\r | |
229 | \r | |
230 | if (Cur < Last) {\r | |
231 | if (Cur == 0) {\r | |
232 | return Node;\r | |
233 | }\r | |
234 | \r | |
235 | Last = Cur;\r | |
236 | Match = Node;\r | |
237 | }\r | |
238 | }\r | |
239 | \r | |
240 | return Match;\r | |
241 | }\r | |
242 | \r | |
243 | \r | |
244 | /**\r | |
245 | Try to find one Tcb whose <Ip, Port> equals to <IN Addr, IN Port>.\r | |
246 | \r | |
247 | @param Addr Pointer to the IP address needs to match.\r | |
248 | @param Port The port number needs to match.\r | |
249 | \r | |
250 | @return The Tcb which matches the <Addr Port> paire exists or not.\r | |
251 | \r | |
252 | **/\r | |
253 | BOOLEAN\r | |
254 | TcpFindTcbByPeer (\r | |
255 | IN EFI_IPv4_ADDRESS *Addr,\r | |
256 | IN TCP_PORTNO Port\r | |
257 | )\r | |
258 | {\r | |
259 | TCP_PORTNO LocalPort;\r | |
260 | NET_LIST_ENTRY *Entry;\r | |
261 | TCP_CB *Tcb;\r | |
262 | \r | |
263 | ASSERT ((Addr != NULL) && (Port != 0));\r | |
264 | \r | |
265 | LocalPort = HTONS (Port);\r | |
266 | \r | |
267 | NET_LIST_FOR_EACH (Entry, &mTcpListenQue) {\r | |
268 | Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
269 | \r | |
772db4bb | 270 | if (EFI_IP4_EQUAL (*Addr, Tcb->LocalEnd.Ip) &&\r |
8a67d61d | 271 | (LocalPort == Tcb->LocalEnd.Port)) {\r |
272 | \r | |
273 | return TRUE;\r | |
274 | }\r | |
275 | }\r | |
276 | \r | |
277 | NET_LIST_FOR_EACH (Entry, &mTcpRunQue) {\r | |
278 | Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
279 | \r | |
772db4bb | 280 | if (EFI_IP4_EQUAL (*Addr, Tcb->LocalEnd.Ip) &&\r |
8a67d61d | 281 | (LocalPort == Tcb->LocalEnd.Port)) {\r |
282 | \r | |
283 | return TRUE;\r | |
284 | }\r | |
285 | }\r | |
286 | \r | |
287 | return FALSE;\r | |
288 | }\r | |
289 | \r | |
290 | \r | |
291 | /**\r | |
292 | Locate the TCP_CB related to the socket pair.\r | |
293 | \r | |
294 | @param LocalPort The local port number.\r | |
295 | @param LocalIp The local IP address.\r | |
296 | @param RemotePort The remote port number.\r | |
297 | @param RemoteIp The remote IP address.\r | |
298 | @param Syn Whether to search the listen sockets, if TRUE, the\r | |
299 | listen sockets are searched.\r | |
300 | \r | |
301 | @return Pointer to the related TCP_CB, if NULL no match is found.\r | |
302 | \r | |
303 | **/\r | |
304 | TCP_CB *\r | |
305 | TcpLocateTcb (\r | |
306 | IN TCP_PORTNO LocalPort,\r | |
307 | IN UINT32 LocalIp,\r | |
308 | IN TCP_PORTNO RemotePort,\r | |
309 | IN UINT32 RemoteIp,\r | |
310 | IN BOOLEAN Syn\r | |
311 | )\r | |
312 | {\r | |
313 | TCP_PEER Local;\r | |
314 | TCP_PEER Remote;\r | |
315 | NET_LIST_ENTRY *Entry;\r | |
316 | TCP_CB *Tcb;\r | |
317 | \r | |
318 | Local.Port = LocalPort;\r | |
319 | Local.Ip = LocalIp;\r | |
320 | \r | |
321 | Remote.Port = RemotePort;\r | |
322 | Remote.Ip = RemoteIp;\r | |
323 | \r | |
324 | //\r | |
325 | // First check for exact match.\r | |
326 | //\r | |
327 | NET_LIST_FOR_EACH (Entry, &mTcpRunQue) {\r | |
328 | Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
329 | \r | |
330 | if (TCP_PEER_EQUAL (&Remote, &Tcb->RemoteEnd) &&\r | |
331 | TCP_PEER_EQUAL (&Local, &Tcb->LocalEnd)) {\r | |
332 | \r | |
333 | NetListRemoveEntry (&Tcb->List);\r | |
334 | NetListInsertHead (&mTcpRunQue, &Tcb->List);\r | |
335 | \r | |
336 | return Tcb;\r | |
337 | }\r | |
338 | }\r | |
339 | \r | |
340 | //\r | |
341 | // Only check listen queue when SYN flag is on\r | |
342 | //\r | |
343 | if (Syn) {\r | |
344 | return TcpLocateListenTcb (&Local, &Remote);\r | |
345 | }\r | |
346 | \r | |
347 | return NULL;\r | |
348 | }\r | |
349 | \r | |
350 | \r | |
351 | /**\r | |
352 | Insert a Tcb into the proper queue.\r | |
353 | \r | |
354 | @param Tcb Pointer to the TCP_CB to be inserted.\r | |
355 | \r | |
356 | @retval 0 The Tcb is inserted successfully.\r | |
357 | @retval -1 Error condition occurred.\r | |
358 | \r | |
359 | **/\r | |
360 | INTN\r | |
361 | TcpInsertTcb (\r | |
362 | IN TCP_CB *Tcb\r | |
363 | )\r | |
364 | {\r | |
365 | NET_LIST_ENTRY *Entry;\r | |
366 | NET_LIST_ENTRY *Head;\r | |
367 | TCP_CB *Node;\r | |
368 | TCP4_PROTO_DATA *TcpProto;\r | |
369 | \r | |
370 | ASSERT (\r | |
371 | Tcb &&\r | |
372 | (\r | |
373 | (Tcb->State == TCP_LISTEN) ||\r | |
374 | (Tcb->State == TCP_SYN_SENT) ||\r | |
375 | (Tcb->State == TCP_SYN_RCVD) ||\r | |
376 | (Tcb->State == TCP_CLOSED)\r | |
377 | )\r | |
378 | );\r | |
379 | \r | |
380 | if (Tcb->LocalEnd.Port == 0) {\r | |
381 | return -1;\r | |
382 | }\r | |
383 | \r | |
384 | Head = &mTcpRunQue;\r | |
385 | \r | |
386 | if (Tcb->State == TCP_LISTEN) {\r | |
387 | Head = &mTcpListenQue;\r | |
388 | }\r | |
389 | \r | |
390 | //\r | |
391 | // Check that Tcb isn't already on the list.\r | |
392 | //\r | |
393 | NET_LIST_FOR_EACH (Entry, Head) {\r | |
394 | Node = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
395 | \r | |
396 | if (TCP_PEER_EQUAL (&Tcb->LocalEnd, &Node->LocalEnd) &&\r | |
397 | TCP_PEER_EQUAL (&Tcb->RemoteEnd, &Node->RemoteEnd)) {\r | |
398 | \r | |
399 | return -1;\r | |
400 | }\r | |
401 | }\r | |
402 | \r | |
403 | NetListInsertHead (Head, &Tcb->List);\r | |
404 | \r | |
405 | TcpProto = (TCP4_PROTO_DATA *) Tcb->Sk->ProtoReserved;\r | |
406 | TcpSetVariableData (TcpProto->TcpService);\r | |
407 | \r | |
408 | return 0;\r | |
409 | }\r | |
410 | \r | |
411 | \r | |
412 | /**\r | |
413 | Clone a TCP_CB from Tcb.\r | |
414 | \r | |
415 | @param Tcb Pointer to the TCP_CB to be cloned.\r | |
416 | \r | |
417 | @return Pointer to the new cloned TCP_CB, if NULL error condition occurred.\r | |
418 | \r | |
419 | **/\r | |
420 | TCP_CB *\r | |
421 | TcpCloneTcb (\r | |
422 | IN TCP_CB *Tcb\r | |
423 | )\r | |
424 | {\r | |
425 | TCP_CB *Clone;\r | |
426 | \r | |
427 | Clone = NetAllocatePool (sizeof (TCP_CB));\r | |
428 | \r | |
429 | if (Clone == NULL) {\r | |
430 | return NULL;\r | |
431 | \r | |
432 | }\r | |
433 | \r | |
434 | NetCopyMem (Clone, Tcb, sizeof (TCP_CB));\r | |
435 | \r | |
436 | //\r | |
437 | // Increate the reference count of the shared IpInfo.\r | |
438 | //\r | |
439 | NET_GET_REF (Tcb->IpInfo);\r | |
440 | \r | |
441 | NetListInit (&Clone->List);\r | |
442 | NetListInit (&Clone->SndQue);\r | |
443 | NetListInit (&Clone->RcvQue);\r | |
444 | \r | |
445 | Clone->Sk = SockClone (Tcb->Sk);\r | |
446 | if (Clone->Sk == NULL) {\r | |
447 | TCP4_DEBUG_ERROR (("TcpCloneTcb: failed to clone a sock\n"));\r | |
448 | NetFreePool (Clone);\r | |
449 | return NULL;\r | |
450 | }\r | |
451 | \r | |
452 | ((TCP4_PROTO_DATA *) (Clone->Sk->ProtoReserved))->TcpPcb = Clone;\r | |
453 | \r | |
454 | return Clone;\r | |
455 | }\r | |
456 | \r | |
457 | \r | |
458 | /**\r | |
459 | Compute an ISS to be used by a new connection.\r | |
460 | \r | |
461 | None\r | |
462 | \r | |
463 | @return The result ISS.\r | |
464 | \r | |
465 | **/\r | |
466 | TCP_SEQNO\r | |
467 | TcpGetIss (\r | |
468 | VOID\r | |
469 | )\r | |
470 | {\r | |
471 | mTcpGlobalIss += 2048;\r | |
472 | return mTcpGlobalIss;\r | |
473 | }\r | |
474 | \r | |
475 | \r | |
476 | /**\r | |
477 | Get the local mss.\r | |
478 | \r | |
479 | None\r | |
480 | \r | |
481 | @return The mss size.\r | |
482 | \r | |
483 | **/\r | |
484 | UINT16\r | |
485 | TcpGetRcvMss (\r | |
486 | IN SOCKET *Sock\r | |
487 | )\r | |
488 | {\r | |
489 | EFI_SIMPLE_NETWORK_MODE SnpMode;\r | |
490 | TCP4_PROTO_DATA *TcpProto;\r | |
491 | EFI_IP4_PROTOCOL *Ip;\r | |
492 | \r | |
493 | ASSERT (Sock);\r | |
494 | \r | |
495 | TcpProto = (TCP4_PROTO_DATA *) Sock->ProtoReserved;\r | |
496 | Ip = TcpProto->TcpService->IpIo->Ip;\r | |
497 | ASSERT (Ip);\r | |
498 | \r | |
499 | Ip->GetModeData (Ip, NULL, NULL, &SnpMode);\r | |
500 | \r | |
501 | return (UINT16) (SnpMode.MaxPacketSize - 40);\r | |
502 | }\r | |
503 | \r | |
504 | \r | |
505 | /**\r | |
506 | Set the Tcb's state.\r | |
507 | \r | |
508 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
509 | @param State The state to be set.\r | |
510 | \r | |
511 | @return None\r | |
512 | \r | |
513 | **/\r | |
514 | VOID\r | |
515 | TcpSetState (\r | |
516 | IN TCP_CB *Tcb,\r | |
517 | IN UINT8 State\r | |
518 | )\r | |
519 | {\r | |
520 | TCP4_DEBUG_TRACE (\r | |
521 | ("Tcb (%x) state %s --> %s\n",\r | |
522 | Tcb,\r | |
523 | mTcpStateName[Tcb->State],\r | |
524 | mTcpStateName[State])\r | |
525 | );\r | |
526 | \r | |
527 | Tcb->State = State;\r | |
528 | \r | |
529 | switch (State) {\r | |
530 | case TCP_ESTABLISHED:\r | |
531 | \r | |
532 | SockConnEstablished (Tcb->Sk);\r | |
533 | break;\r | |
534 | \r | |
535 | case TCP_CLOSED:\r | |
536 | \r | |
537 | SockConnClosed (Tcb->Sk);\r | |
538 | \r | |
539 | break;\r | |
540 | }\r | |
541 | }\r | |
542 | \r | |
543 | \r | |
544 | /**\r | |
545 | Compute the TCP segment's checksum.\r | |
546 | \r | |
547 | @param Nbuf Pointer to the buffer that contains the TCP\r | |
548 | segment.\r | |
549 | @param HeadSum The checksum value of the fixed part of pseudo\r | |
550 | header.\r | |
551 | \r | |
552 | @return The checksum value.\r | |
553 | \r | |
554 | **/\r | |
555 | UINT16\r | |
556 | TcpChecksum (\r | |
557 | IN NET_BUF *Nbuf,\r | |
558 | IN UINT16 HeadSum\r | |
559 | )\r | |
560 | {\r | |
561 | UINT16 Checksum;\r | |
562 | \r | |
563 | Checksum = NetbufChecksum (Nbuf);\r | |
564 | Checksum = NetAddChecksum (Checksum, HeadSum);\r | |
565 | \r | |
566 | Checksum = NetAddChecksum (\r | |
567 | Checksum,\r | |
568 | HTONS ((UINT16) Nbuf->TotalSize)\r | |
569 | );\r | |
570 | \r | |
4eb65aff | 571 | return (UINT16) ~Checksum;\r |
8a67d61d | 572 | }\r |
573 | \r | |
574 | \r | |
575 | /**\r | |
576 | Translate the information from the head of the received TCP\r | |
577 | segment Nbuf contains and fill it into a TCP_SEG structure.\r | |
578 | \r | |
579 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
580 | @param Nbuf Pointer to the buffer contains the TCP segment.\r | |
581 | \r | |
582 | @return Pointer to the TCP_SEG that contains the translated TCP head information.\r | |
583 | \r | |
584 | **/\r | |
585 | TCP_SEG *\r | |
586 | TcpFormatNetbuf (\r | |
587 | IN TCP_CB *Tcb,\r | |
588 | IN NET_BUF *Nbuf\r | |
589 | )\r | |
590 | {\r | |
591 | TCP_SEG *Seg;\r | |
592 | TCP_HEAD *Head;\r | |
593 | \r | |
594 | Seg = TCPSEG_NETBUF (Nbuf);\r | |
595 | Head = (TCP_HEAD *) NetbufGetByte (Nbuf, 0, NULL);\r | |
596 | Nbuf->Tcp = Head;\r | |
597 | \r | |
598 | Seg->Seq = NTOHL (Head->Seq);\r | |
599 | Seg->Ack = NTOHL (Head->Ack);\r | |
600 | Seg->End = Seg->Seq + (Nbuf->TotalSize - (Head->HeadLen << 2));\r | |
601 | \r | |
602 | Seg->Urg = NTOHS (Head->Urg);\r | |
603 | Seg->Wnd = (NTOHS (Head->Wnd) << Tcb->SndWndScale);\r | |
604 | Seg->Flag = Head->Flag;\r | |
605 | \r | |
606 | //\r | |
607 | // SYN and FIN flag occupy one sequence space each.\r | |
608 | //\r | |
609 | if (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN)) {\r | |
610 | //\r | |
611 | // RFC requires that initial window not be scaled\r | |
612 | //\r | |
613 | Seg->Wnd = NTOHS (Head->Wnd);\r | |
614 | Seg->End++;\r | |
615 | }\r | |
616 | \r | |
617 | if (TCP_FLG_ON (Seg->Flag, TCP_FLG_FIN)) {\r | |
618 | Seg->End++;\r | |
619 | }\r | |
620 | \r | |
621 | return Seg;\r | |
622 | }\r | |
623 | \r | |
624 | \r | |
625 | /**\r | |
626 | Reset the connection related with Tcb.\r | |
627 | \r | |
628 | @param Tcb Pointer to the TCP_CB of the connection to be\r | |
629 | reset.\r | |
630 | \r | |
631 | @return None\r | |
632 | \r | |
633 | **/\r | |
634 | VOID\r | |
635 | TcpResetConnection (\r | |
636 | IN TCP_CB *Tcb\r | |
637 | )\r | |
638 | {\r | |
639 | NET_BUF *Nbuf;\r | |
640 | TCP_HEAD *Nhead;\r | |
641 | \r | |
642 | Nbuf = NetbufAlloc (TCP_MAX_HEAD);\r | |
643 | \r | |
644 | if (Nbuf == NULL) {\r | |
645 | return ;\r | |
646 | }\r | |
647 | \r | |
648 | Nhead = (TCP_HEAD *) NetbufAllocSpace (\r | |
649 | Nbuf,\r | |
650 | sizeof (TCP_HEAD),\r | |
651 | NET_BUF_TAIL\r | |
652 | );\r | |
653 | \r | |
654 | ASSERT (Nhead != NULL);\r | |
655 | \r | |
656 | Nbuf->Tcp = Nhead;\r | |
657 | \r | |
658 | Nhead->Flag = TCP_FLG_RST;\r | |
659 | Nhead->Seq = HTONL (Tcb->SndNxt);\r | |
660 | Nhead->Ack = HTONL (Tcb->RcvNxt);\r | |
661 | Nhead->SrcPort = Tcb->LocalEnd.Port;\r | |
662 | Nhead->DstPort = Tcb->RemoteEnd.Port;\r | |
663 | Nhead->HeadLen = (sizeof (TCP_HEAD) >> 2);\r | |
664 | Nhead->Res = 0;\r | |
665 | Nhead->Wnd = HTONS (0xFFFF);\r | |
666 | Nhead->Checksum = 0;\r | |
667 | Nhead->Urg = 0;\r | |
668 | Nhead->Checksum = TcpChecksum (Nbuf, Tcb->HeadSum);\r | |
669 | \r | |
670 | TcpSendIpPacket (Tcb, Nbuf, Tcb->LocalEnd.Ip, Tcb->RemoteEnd.Ip);\r | |
671 | \r | |
672 | NetbufFree (Nbuf);\r | |
673 | }\r | |
674 | \r | |
675 | \r | |
676 | /**\r | |
677 | Initialize an active connection,\r | |
678 | \r | |
679 | @param Tcb Pointer to the TCP_CB that wants to initiate a\r | |
680 | connection.\r | |
681 | \r | |
682 | @return None\r | |
683 | \r | |
684 | **/\r | |
685 | VOID\r | |
686 | TcpOnAppConnect (\r | |
687 | IN TCP_CB *Tcb\r | |
688 | )\r | |
689 | {\r | |
690 | TcpInitTcbLocal (Tcb);\r | |
691 | TcpSetState (Tcb, TCP_SYN_SENT);\r | |
692 | \r | |
693 | TcpSetTimer (Tcb, TCP_TIMER_CONNECT, Tcb->ConnectTimeout);\r | |
694 | TcpToSendData (Tcb, 1);\r | |
695 | }\r | |
696 | \r | |
697 | \r | |
698 | /**\r | |
699 | Initiate the connection close procedure, called when\r | |
700 | applications want to close the connection.\r | |
701 | \r | |
702 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
703 | \r | |
704 | @return None.\r | |
705 | \r | |
706 | **/\r | |
707 | VOID\r | |
708 | TcpOnAppClose (\r | |
709 | IN TCP_CB *Tcb\r | |
710 | )\r | |
711 | {\r | |
712 | ASSERT (Tcb);\r | |
713 | \r | |
714 | if (!NetListIsEmpty (&Tcb->RcvQue) || GET_RCV_DATASIZE (Tcb->Sk)) {\r | |
715 | \r | |
716 | TCP4_DEBUG_WARN (("TcpOnAppClose: connection reset "\r | |
717 | "because data is lost for TCB %x\n", Tcb));\r | |
718 | \r | |
719 | TcpResetConnection (Tcb);\r | |
720 | TcpClose (Tcb);\r | |
721 | return;\r | |
722 | }\r | |
723 | \r | |
724 | switch (Tcb->State) {\r | |
725 | case TCP_CLOSED:\r | |
726 | case TCP_LISTEN:\r | |
727 | case TCP_SYN_SENT:\r | |
728 | TcpSetState (Tcb, TCP_CLOSED);\r | |
729 | break;\r | |
730 | \r | |
731 | case TCP_SYN_RCVD:\r | |
732 | case TCP_ESTABLISHED:\r | |
733 | TcpSetState (Tcb, TCP_FIN_WAIT_1);\r | |
734 | break;\r | |
735 | \r | |
736 | case TCP_CLOSE_WAIT:\r | |
737 | TcpSetState (Tcb, TCP_LAST_ACK);\r | |
738 | break;\r | |
739 | }\r | |
740 | \r | |
741 | TcpToSendData (Tcb, 1);\r | |
742 | }\r | |
743 | \r | |
744 | \r | |
745 | /**\r | |
746 | Check whether the application's newly delivered data\r | |
747 | can be sent out.\r | |
748 | \r | |
749 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
750 | \r | |
751 | @retval 0 Whether the data is sent out or is buffered for\r | |
752 | further sending.\r | |
753 | @retval -1 The Tcb is not in a state that data is permitted to\r | |
754 | be sent out.\r | |
755 | \r | |
756 | **/\r | |
757 | INTN\r | |
758 | TcpOnAppSend (\r | |
759 | IN TCP_CB *Tcb\r | |
760 | )\r | |
761 | {\r | |
762 | \r | |
763 | switch (Tcb->State) {\r | |
764 | case TCP_CLOSED:\r | |
765 | return -1;\r | |
766 | break;\r | |
767 | \r | |
768 | case TCP_LISTEN:\r | |
769 | return -1;\r | |
770 | break;\r | |
771 | \r | |
772 | case TCP_SYN_SENT:\r | |
773 | case TCP_SYN_RCVD:\r | |
774 | return 0;\r | |
775 | break;\r | |
776 | \r | |
777 | case TCP_ESTABLISHED:\r | |
778 | case TCP_CLOSE_WAIT:\r | |
779 | TcpToSendData (Tcb, 0);\r | |
780 | return 0;\r | |
781 | break;\r | |
782 | \r | |
783 | case TCP_FIN_WAIT_1:\r | |
784 | case TCP_FIN_WAIT_2:\r | |
785 | case TCP_CLOSING:\r | |
786 | case TCP_LAST_ACK:\r | |
787 | case TCP_TIME_WAIT:\r | |
788 | return -1;\r | |
789 | break;\r | |
790 | }\r | |
791 | \r | |
792 | return 0;\r | |
793 | }\r | |
794 | \r | |
795 | \r | |
796 | /**\r | |
797 | Application has consumed some data, check whether\r | |
798 | to send a window updata ack or a delayed ack.\r | |
799 | \r | |
800 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
801 | \r | |
802 | \r | |
803 | **/\r | |
804 | INTN\r | |
805 | TcpOnAppConsume (\r | |
806 | IN TCP_CB *Tcb\r | |
807 | )\r | |
808 | {\r | |
4eb65aff | 809 | UINT32 TcpOld;\r |
8a67d61d | 810 | \r |
811 | switch (Tcb->State) {\r | |
812 | case TCP_CLOSED:\r | |
813 | return -1;\r | |
814 | break;\r | |
815 | \r | |
816 | case TCP_LISTEN:\r | |
817 | return -1;\r | |
818 | break;\r | |
819 | \r | |
820 | case TCP_SYN_SENT:\r | |
821 | case TCP_SYN_RCVD:\r | |
822 | return 0;\r | |
823 | break;\r | |
824 | \r | |
825 | case TCP_ESTABLISHED:\r | |
4eb65aff | 826 | TcpOld = TcpRcvWinOld (Tcb);\r |
827 | if (TcpRcvWinNow (Tcb) > TcpOld) {\r | |
8a67d61d | 828 | \r |
4eb65aff | 829 | if (TcpOld < Tcb->RcvMss) {\r |
8a67d61d | 830 | \r |
831 | TCP4_DEBUG_TRACE (("TcpOnAppConsume: send a window"\r | |
832 | " update for a window closed Tcb(%x)\n", Tcb));\r | |
833 | \r | |
834 | TcpSendAck (Tcb);\r | |
835 | } else if (Tcb->DelayedAck == 0) {\r | |
836 | \r | |
837 | TCP4_DEBUG_TRACE (("TcpOnAppConsume: scheduled a delayed"\r | |
838 | " ACK to update window for Tcb(%x)\n", Tcb));\r | |
839 | \r | |
840 | Tcb->DelayedAck = 1;\r | |
841 | }\r | |
842 | }\r | |
843 | \r | |
844 | break;\r | |
845 | \r | |
846 | case TCP_CLOSE_WAIT:\r | |
847 | return 0;\r | |
848 | break;\r | |
849 | \r | |
850 | case TCP_FIN_WAIT_1:\r | |
851 | case TCP_FIN_WAIT_2:\r | |
852 | case TCP_CLOSING:\r | |
853 | case TCP_LAST_ACK:\r | |
854 | case TCP_TIME_WAIT:\r | |
855 | return -1;\r | |
856 | break;\r | |
857 | }\r | |
858 | \r | |
859 | return -1;\r | |
860 | }\r | |
861 | \r | |
862 | \r | |
863 | /**\r | |
864 | Abort the connection by sending a reset segment, called\r | |
865 | when the application wants to abort the connection.\r | |
866 | \r | |
867 | @param Tcb Pointer to the TCP_CB of the TCP instance.\r | |
868 | \r | |
869 | @return None.\r | |
870 | \r | |
871 | **/\r | |
872 | VOID\r | |
873 | TcpOnAppAbort (\r | |
874 | IN TCP_CB *Tcb\r | |
875 | )\r | |
876 | {\r | |
877 | TCP4_DEBUG_WARN (("TcpOnAppAbort: connection reset "\r | |
878 | "issued by application for TCB %x\n", Tcb));\r | |
879 | \r | |
880 | switch (Tcb->State) {\r | |
881 | case TCP_SYN_RCVD:\r | |
882 | case TCP_ESTABLISHED:\r | |
883 | case TCP_FIN_WAIT_1:\r | |
884 | case TCP_FIN_WAIT_2:\r | |
885 | case TCP_CLOSE_WAIT:\r | |
886 | TcpResetConnection (Tcb);\r | |
887 | break;\r | |
888 | }\r | |
889 | \r | |
890 | TcpSetState (Tcb, TCP_CLOSED);\r | |
891 | }\r | |
892 | \r | |
893 | \r | |
894 | /**\r | |
895 | Set the Tdp4 variable data.\r | |
896 | \r | |
897 | @param Tcp4Service Tcp4 service data.\r | |
898 | \r | |
899 | @retval EFI_OUT_OF_RESOURCES There are not enough resources to set the variable.\r | |
900 | @retval other Set variable failed.\r | |
901 | \r | |
902 | **/\r | |
903 | EFI_STATUS\r | |
904 | TcpSetVariableData (\r | |
905 | IN TCP4_SERVICE_DATA *Tcp4Service\r | |
906 | )\r | |
907 | {\r | |
908 | UINT32 NumConfiguredInstance;\r | |
909 | NET_LIST_ENTRY *Entry;\r | |
910 | TCP_CB *TcpPcb;\r | |
911 | TCP4_PROTO_DATA *TcpProto;\r | |
912 | UINTN VariableDataSize;\r | |
913 | EFI_TCP4_VARIABLE_DATA *Tcp4VariableData;\r | |
914 | EFI_TCP4_SERVICE_POINT *Tcp4ServicePoint;\r | |
915 | CHAR16 *NewMacString;\r | |
916 | EFI_STATUS Status;\r | |
917 | \r | |
918 | NumConfiguredInstance = 0;\r | |
919 | \r | |
920 | //\r | |
921 | // Go through the running queue to count the instances.\r | |
922 | //\r | |
923 | NET_LIST_FOR_EACH (Entry, &mTcpRunQue) {\r | |
924 | TcpPcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
925 | \r | |
926 | TcpProto = (TCP4_PROTO_DATA *) TcpPcb->Sk->ProtoReserved;\r | |
927 | \r | |
928 | if (TcpProto->TcpService == Tcp4Service) {\r | |
929 | //\r | |
930 | // This tcp instance belongs to the Tcp4Service.\r | |
931 | //\r | |
932 | NumConfiguredInstance++;\r | |
933 | }\r | |
934 | }\r | |
935 | \r | |
936 | //\r | |
937 | // Go through the listening queue to count the instances.\r | |
938 | //\r | |
939 | NET_LIST_FOR_EACH (Entry, &mTcpListenQue) {\r | |
940 | TcpPcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
941 | \r | |
942 | TcpProto = (TCP4_PROTO_DATA *) TcpPcb->Sk->ProtoReserved;\r | |
943 | \r | |
944 | if (TcpProto->TcpService == Tcp4Service) {\r | |
945 | //\r | |
946 | // This tcp instance belongs to the Tcp4Service.\r | |
947 | //\r | |
948 | NumConfiguredInstance++;\r | |
949 | }\r | |
950 | }\r | |
951 | \r | |
952 | //\r | |
953 | // Calculate the size of the Tcp4VariableData. As there may be no Tcp4 child,\r | |
954 | // we should add extra buffer for the service points only if the number of configured\r | |
955 | // children is more than 1.\r | |
956 | //\r | |
957 | VariableDataSize = sizeof (EFI_TCP4_VARIABLE_DATA);\r | |
958 | \r | |
959 | if (NumConfiguredInstance > 1) {\r | |
960 | VariableDataSize += sizeof (EFI_TCP4_SERVICE_POINT) * (NumConfiguredInstance - 1);\r | |
961 | }\r | |
962 | \r | |
963 | Tcp4VariableData = NetAllocatePool (VariableDataSize);\r | |
964 | if (Tcp4VariableData == NULL) {\r | |
965 | return EFI_OUT_OF_RESOURCES;\r | |
966 | }\r | |
967 | \r | |
968 | Tcp4VariableData->DriverHandle = Tcp4Service->DriverBindingHandle;\r | |
969 | Tcp4VariableData->ServiceCount = NumConfiguredInstance;\r | |
970 | \r | |
971 | Tcp4ServicePoint = &Tcp4VariableData->Services[0];\r | |
972 | \r | |
973 | //\r | |
974 | // Go through the running queue to fill the service points.\r | |
975 | //\r | |
976 | NET_LIST_FOR_EACH (Entry, &mTcpRunQue) {\r | |
977 | TcpPcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
978 | \r | |
979 | TcpProto = (TCP4_PROTO_DATA *) TcpPcb->Sk->ProtoReserved;\r | |
980 | \r | |
981 | if (TcpProto->TcpService == Tcp4Service) {\r | |
982 | //\r | |
983 | // This tcp instance belongs to the Tcp4Service.\r | |
984 | //\r | |
985 | Tcp4ServicePoint->InstanceHandle = TcpPcb->Sk->SockHandle;\r | |
772db4bb | 986 | NetCopyMem (&Tcp4ServicePoint->LocalAddress, &TcpPcb->LocalEnd.Ip, sizeof (EFI_IPv4_ADDRESS));\r |
8a67d61d | 987 | Tcp4ServicePoint->LocalPort = NTOHS (TcpPcb->LocalEnd.Port);\r |
772db4bb | 988 | NetCopyMem (&Tcp4ServicePoint->RemoteAddress, &TcpPcb->RemoteEnd.Ip, sizeof (EFI_IPv4_ADDRESS));\r |
8a67d61d | 989 | Tcp4ServicePoint->RemotePort = NTOHS (TcpPcb->RemoteEnd.Port);\r |
990 | \r | |
991 | Tcp4ServicePoint++;\r | |
992 | }\r | |
993 | }\r | |
994 | \r | |
995 | //\r | |
996 | // Go through the listening queue to fill the service points.\r | |
997 | //\r | |
998 | NET_LIST_FOR_EACH (Entry, &mTcpListenQue) {\r | |
999 | TcpPcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
1000 | \r | |
1001 | TcpProto = (TCP4_PROTO_DATA *) TcpPcb->Sk->ProtoReserved;\r | |
1002 | \r | |
1003 | if (TcpProto->TcpService == Tcp4Service) {\r | |
1004 | //\r | |
1005 | // This tcp instance belongs to the Tcp4Service.\r | |
1006 | //\r | |
1007 | Tcp4ServicePoint->InstanceHandle = TcpPcb->Sk->SockHandle;\r | |
772db4bb | 1008 | NetCopyMem (&Tcp4ServicePoint->LocalAddress, &TcpPcb->LocalEnd.Ip, sizeof (EFI_IPv4_ADDRESS));\r |
8a67d61d | 1009 | Tcp4ServicePoint->LocalPort = NTOHS (TcpPcb->LocalEnd.Port);\r |
772db4bb | 1010 | NetCopyMem (&Tcp4ServicePoint->RemoteAddress, &TcpPcb->RemoteEnd.Ip, sizeof (EFI_IPv4_ADDRESS));\r |
8a67d61d | 1011 | Tcp4ServicePoint->RemotePort = NTOHS (TcpPcb->RemoteEnd.Port);\r |
1012 | \r | |
1013 | Tcp4ServicePoint++;\r | |
1014 | }\r | |
1015 | }\r | |
1016 | \r | |
1017 | //\r | |
1018 | // Get the mac string.\r | |
1019 | //\r | |
1020 | Status = NetLibGetMacString (\r | |
1021 | Tcp4Service->ControllerHandle,\r | |
1022 | Tcp4Service->DriverBindingHandle,\r | |
1023 | &NewMacString\r | |
1024 | );\r | |
1025 | if (EFI_ERROR (Status)) {\r | |
1026 | goto ON_ERROR;\r | |
1027 | }\r | |
1028 | \r | |
1029 | if (Tcp4Service->MacString != NULL) {\r | |
1030 | //\r | |
1031 | // The variable is set already, we're going to update it.\r | |
1032 | //\r | |
1033 | if (StrCmp (Tcp4Service->MacString, NewMacString) != 0) {\r | |
1034 | //\r | |
1035 | // The mac address is changed, delete the previous variable first.\r | |
1036 | //\r | |
1037 | gRT->SetVariable (\r | |
1038 | Tcp4Service->MacString,\r | |
1039 | &gEfiTcp4ServiceBindingProtocolGuid,\r | |
1040 | EFI_VARIABLE_BOOTSERVICE_ACCESS,\r | |
1041 | 0,\r | |
1042 | NULL\r | |
1043 | );\r | |
1044 | }\r | |
1045 | \r | |
1046 | NetFreePool (Tcp4Service->MacString);\r | |
1047 | }\r | |
1048 | \r | |
1049 | Tcp4Service->MacString = NewMacString;\r | |
1050 | \r | |
1051 | Status = gRT->SetVariable (\r | |
1052 | Tcp4Service->MacString,\r | |
1053 | &gEfiTcp4ServiceBindingProtocolGuid,\r | |
1054 | EFI_VARIABLE_BOOTSERVICE_ACCESS,\r | |
1055 | VariableDataSize,\r | |
1056 | (VOID *) Tcp4VariableData\r | |
1057 | );\r | |
1058 | \r | |
1059 | ON_ERROR:\r | |
1060 | \r | |
1061 | NetFreePool (Tcp4VariableData);\r | |
1062 | \r | |
1063 | return Status;\r | |
1064 | }\r | |
1065 | \r | |
1066 | \r | |
1067 | /**\r | |
1068 | Clear the variable and free the resource.\r | |
1069 | \r | |
1070 | @param Tcp4Service Tcp4 service data.\r | |
1071 | \r | |
1072 | @return None.\r | |
1073 | \r | |
1074 | **/\r | |
1075 | VOID\r | |
1076 | TcpClearVariableData (\r | |
1077 | IN TCP4_SERVICE_DATA *Tcp4Service\r | |
1078 | )\r | |
1079 | {\r | |
1080 | ASSERT (Tcp4Service->MacString != NULL);\r | |
1081 | \r | |
1082 | gRT->SetVariable (\r | |
1083 | Tcp4Service->MacString,\r | |
1084 | &gEfiTcp4ServiceBindingProtocolGuid,\r | |
1085 | EFI_VARIABLE_BOOTSERVICE_ACCESS,\r | |
1086 | 0,\r | |
1087 | NULL\r | |
1088 | );\r | |
1089 | \r | |
1090 | NetFreePool (Tcp4Service->MacString);\r | |
1091 | Tcp4Service->MacString = NULL;\r | |
1092 | }\r | |
1093 | \r |