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8a67d61d | 1 | /** @file\r |
dfc1f033 | 2 | Misc support routines for tcp.\r |
8a67d61d | 3 | \r |
d1102dba | 4 | Copyright (c) 2005 - 2018, 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 | \r | |
16 | #include "Tcp4Main.h"\r | |
17 | \r | |
e5e12de7 | 18 | #include <Library/DevicePathLib.h>\r |
19 | \r | |
e48e37fc | 20 | LIST_ENTRY mTcpRunQue = {\r |
8a67d61d | 21 | &mTcpRunQue,\r |
22 | &mTcpRunQue\r | |
23 | };\r | |
24 | \r | |
e48e37fc | 25 | LIST_ENTRY mTcpListenQue = {\r |
8a67d61d | 26 | &mTcpListenQue,\r |
27 | &mTcpListenQue\r | |
28 | };\r | |
29 | \r | |
30 | TCP_SEQNO mTcpGlobalIss = 0x4d7e980b;\r | |
31 | \r | |
84b5c78e | 32 | CHAR16 *mTcpStateName[] = {\r |
8a67d61d | 33 | L"TCP_CLOSED",\r |
34 | L"TCP_LISTEN",\r | |
35 | L"TCP_SYN_SENT",\r | |
36 | L"TCP_SYN_RCVD",\r | |
37 | L"TCP_ESTABLISHED",\r | |
38 | L"TCP_FIN_WAIT_1",\r | |
39 | L"TCP_FIN_WAIT_2",\r | |
40 | L"TCP_CLOSING",\r | |
41 | L"TCP_TIME_WAIT",\r | |
42 | L"TCP_CLOSE_WAIT",\r | |
43 | L"TCP_LAST_ACK"\r | |
44 | };\r | |
45 | \r | |
46 | \r | |
47 | /**\r | |
48 | Initialize the Tcb local related members.\r | |
49 | \r | |
50 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
51 | \r | |
8a67d61d | 52 | **/\r |
53 | VOID\r | |
54 | TcpInitTcbLocal (\r | |
77f00155 | 55 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 56 | )\r |
57 | {\r | |
58 | //\r | |
59 | // Compute the checksum of the fixed parts of pseudo header\r | |
60 | //\r | |
61 | Tcb->HeadSum = NetPseudoHeadChecksum (\r | |
62 | Tcb->LocalEnd.Ip,\r | |
63 | Tcb->RemoteEnd.Ip,\r | |
64 | 0x06,\r | |
65 | 0\r | |
66 | );\r | |
67 | \r | |
68 | Tcb->Iss = TcpGetIss ();\r | |
69 | Tcb->SndUna = Tcb->Iss;\r | |
70 | Tcb->SndNxt = Tcb->Iss;\r | |
71 | \r | |
72 | Tcb->SndWl2 = Tcb->Iss;\r | |
73 | Tcb->SndWnd = 536;\r | |
74 | \r | |
75 | Tcb->RcvWnd = GET_RCV_BUFFSIZE (Tcb->Sk);\r | |
76 | \r | |
77 | //\r | |
120db52c | 78 | // First window size is never scaled\r |
8a67d61d | 79 | //\r |
ac8cca2a | 80 | Tcb->RcvWndScale = 0;\r |
ca12a0c8 | 81 | Tcb->RetxmitSeqMax = 0;\r |
d1102dba | 82 | \r |
ac8cca2a | 83 | Tcb->ProbeTimerOn = FALSE;\r |
8a67d61d | 84 | }\r |
85 | \r | |
86 | \r | |
87 | /**\r | |
88 | Initialize the peer related members.\r | |
89 | \r | |
90 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
91 | @param Seg Pointer to the segment that contains the peer's\r | |
92 | intial info.\r | |
93 | @param Opt Pointer to the options announced by the peer.\r | |
94 | \r | |
8a67d61d | 95 | **/\r |
96 | VOID\r | |
97 | TcpInitTcbPeer (\r | |
77f00155 | 98 | IN OUT TCP_CB *Tcb,\r |
99 | IN TCP_SEG *Seg,\r | |
100 | IN TCP_OPTION *Opt\r | |
8a67d61d | 101 | )\r |
102 | {\r | |
103 | UINT16 RcvMss;\r | |
104 | \r | |
276dcc1b | 105 | ASSERT ((Tcb != NULL) && (Seg != NULL) && (Opt != NULL));\r |
8a67d61d | 106 | ASSERT (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN));\r |
107 | \r | |
108 | Tcb->SndWnd = Seg->Wnd;\r | |
109 | Tcb->SndWndMax = Tcb->SndWnd;\r | |
110 | Tcb->SndWl1 = Seg->Seq;\r | |
111 | \r | |
112 | if (TCP_FLG_ON (Seg->Flag, TCP_FLG_ACK)) {\r | |
113 | Tcb->SndWl2 = Seg->Ack;\r | |
114 | } else {\r | |
115 | Tcb->SndWl2 = Tcb->Iss + 1;\r | |
116 | }\r | |
117 | \r | |
118 | if (TCP_FLG_ON (Opt->Flag, TCP_OPTION_RCVD_MSS)) {\r | |
36ee91ca | 119 | Tcb->SndMss = (UINT16) MAX (64, Opt->Mss);\r |
8a67d61d | 120 | \r |
121 | RcvMss = TcpGetRcvMss (Tcb->Sk);\r | |
122 | if (Tcb->SndMss > RcvMss) {\r | |
123 | Tcb->SndMss = RcvMss;\r | |
124 | }\r | |
125 | \r | |
126 | } else {\r | |
127 | //\r | |
128 | // One end doesn't support MSS option, use default.\r | |
129 | //\r | |
130 | Tcb->RcvMss = 536;\r | |
131 | }\r | |
132 | \r | |
133 | Tcb->CWnd = Tcb->SndMss;\r | |
134 | \r | |
135 | Tcb->Irs = Seg->Seq;\r | |
136 | Tcb->RcvNxt = Tcb->Irs + 1;\r | |
137 | \r | |
138 | Tcb->RcvWl2 = Tcb->RcvNxt;\r | |
139 | \r | |
140 | if (TCP_FLG_ON (Opt->Flag, TCP_OPTION_RCVD_WS) &&\r | |
141 | !TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_WS)) {\r | |
142 | \r | |
143 | Tcb->SndWndScale = Opt->WndScale;\r | |
144 | \r | |
145 | Tcb->RcvWndScale = TcpComputeScale (Tcb);\r | |
146 | TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_RCVD_WS);\r | |
147 | \r | |
148 | } else {\r | |
149 | //\r | |
150 | // One end doesn't support window scale option. use zero.\r | |
151 | //\r | |
152 | Tcb->RcvWndScale = 0;\r | |
153 | }\r | |
154 | \r | |
155 | if (TCP_FLG_ON (Opt->Flag, TCP_OPTION_RCVD_TS) &&\r | |
156 | !TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_TS)) {\r | |
157 | \r | |
158 | TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_SND_TS);\r | |
159 | TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_RCVD_TS);\r | |
160 | \r | |
185395a4 BZ |
161 | Tcb->TsRecent = Opt->TSVal;\r |
162 | \r | |
8a67d61d | 163 | //\r |
164 | // Compute the effective SndMss per RFC1122\r | |
165 | // section 4.2.2.6. If timestamp option is\r | |
166 | // enabled, it will always occupy 12 bytes.\r | |
167 | //\r | |
168 | Tcb->SndMss -= TCP_OPTION_TS_ALIGNED_LEN;\r | |
169 | }\r | |
170 | }\r | |
171 | \r | |
172 | \r | |
173 | /**\r | |
174 | Locate a listen TCB that matchs the Local and Remote.\r | |
175 | \r | |
176 | @param Local Pointer to the local (IP, Port).\r | |
177 | @param Remote Pointer to the remote (IP, Port).\r | |
178 | \r | |
9c4a5f74 | 179 | @return Pointer to the TCP_CB with the least number of wildcard,\r |
120db52c | 180 | if NULL no match is found.\r |
8a67d61d | 181 | \r |
182 | **/\r | |
8a67d61d | 183 | TCP_CB *\r |
184 | TcpLocateListenTcb (\r | |
185 | IN TCP_PEER *Local,\r | |
186 | IN TCP_PEER *Remote\r | |
187 | )\r | |
188 | {\r | |
e48e37fc | 189 | LIST_ENTRY *Entry;\r |
8a67d61d | 190 | TCP_CB *Node;\r |
191 | TCP_CB *Match;\r | |
192 | INTN Last;\r | |
193 | INTN Cur;\r | |
194 | \r | |
195 | Last = 4;\r | |
196 | Match = NULL;\r | |
197 | \r | |
198 | NET_LIST_FOR_EACH (Entry, &mTcpListenQue) {\r | |
199 | Node = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
200 | \r | |
201 | if ((Local->Port != Node->LocalEnd.Port) ||\r | |
202 | !TCP_PEER_MATCH (Remote, &Node->RemoteEnd) ||\r | |
120db52c | 203 | !TCP_PEER_MATCH (Local, &Node->LocalEnd)) {\r |
8a67d61d | 204 | \r |
205 | continue;\r | |
206 | }\r | |
207 | \r | |
208 | //\r | |
209 | // Compute the number of wildcard\r | |
210 | //\r | |
211 | Cur = 0;\r | |
212 | if (Node->RemoteEnd.Ip == 0) {\r | |
213 | Cur++;\r | |
214 | }\r | |
215 | \r | |
216 | if (Node->RemoteEnd.Port == 0) {\r | |
217 | Cur++;\r | |
218 | }\r | |
219 | \r | |
220 | if (Node->LocalEnd.Ip == 0) {\r | |
221 | Cur++;\r | |
222 | }\r | |
223 | \r | |
224 | if (Cur < Last) {\r | |
225 | if (Cur == 0) {\r | |
226 | return Node;\r | |
227 | }\r | |
228 | \r | |
229 | Last = Cur;\r | |
230 | Match = Node;\r | |
231 | }\r | |
232 | }\r | |
233 | \r | |
234 | return Match;\r | |
235 | }\r | |
236 | \r | |
237 | \r | |
238 | /**\r | |
239 | Try to find one Tcb whose <Ip, Port> equals to <IN Addr, IN Port>.\r | |
240 | \r | |
241 | @param Addr Pointer to the IP address needs to match.\r | |
242 | @param Port The port number needs to match.\r | |
243 | \r | |
120db52c | 244 | @return The Tcb which matches the <Addr Port> paire exists or not.\r |
8a67d61d | 245 | \r |
246 | **/\r | |
247 | BOOLEAN\r | |
248 | TcpFindTcbByPeer (\r | |
249 | IN EFI_IPv4_ADDRESS *Addr,\r | |
250 | IN TCP_PORTNO Port\r | |
251 | )\r | |
252 | {\r | |
253 | TCP_PORTNO LocalPort;\r | |
e48e37fc | 254 | LIST_ENTRY *Entry;\r |
8a67d61d | 255 | TCP_CB *Tcb;\r |
256 | \r | |
257 | ASSERT ((Addr != NULL) && (Port != 0));\r | |
258 | \r | |
259 | LocalPort = HTONS (Port);\r | |
260 | \r | |
261 | NET_LIST_FOR_EACH (Entry, &mTcpListenQue) {\r | |
262 | Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
263 | \r | |
84b5c78e | 264 | if (EFI_IP4_EQUAL (Addr, &Tcb->LocalEnd.Ip) &&\r |
8a67d61d | 265 | (LocalPort == Tcb->LocalEnd.Port)) {\r |
266 | \r | |
267 | return TRUE;\r | |
268 | }\r | |
269 | }\r | |
270 | \r | |
271 | NET_LIST_FOR_EACH (Entry, &mTcpRunQue) {\r | |
272 | Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
273 | \r | |
84b5c78e | 274 | if (EFI_IP4_EQUAL (Addr, &Tcb->LocalEnd.Ip) &&\r |
8a67d61d | 275 | (LocalPort == Tcb->LocalEnd.Port)) {\r |
276 | \r | |
277 | return TRUE;\r | |
278 | }\r | |
279 | }\r | |
280 | \r | |
281 | return FALSE;\r | |
282 | }\r | |
283 | \r | |
284 | \r | |
285 | /**\r | |
286 | Locate the TCP_CB related to the socket pair.\r | |
287 | \r | |
288 | @param LocalPort The local port number.\r | |
289 | @param LocalIp The local IP address.\r | |
290 | @param RemotePort The remote port number.\r | |
291 | @param RemoteIp The remote IP address.\r | |
292 | @param Syn Whether to search the listen sockets, if TRUE, the\r | |
293 | listen sockets are searched.\r | |
294 | \r | |
120db52c | 295 | @return Pointer to the related TCP_CB, if NULL no match is found.\r |
8a67d61d | 296 | \r |
297 | **/\r | |
298 | TCP_CB *\r | |
299 | TcpLocateTcb (\r | |
300 | IN TCP_PORTNO LocalPort,\r | |
301 | IN UINT32 LocalIp,\r | |
302 | IN TCP_PORTNO RemotePort,\r | |
303 | IN UINT32 RemoteIp,\r | |
304 | IN BOOLEAN Syn\r | |
305 | )\r | |
306 | {\r | |
307 | TCP_PEER Local;\r | |
308 | TCP_PEER Remote;\r | |
e48e37fc | 309 | LIST_ENTRY *Entry;\r |
8a67d61d | 310 | TCP_CB *Tcb;\r |
311 | \r | |
312 | Local.Port = LocalPort;\r | |
313 | Local.Ip = LocalIp;\r | |
314 | \r | |
315 | Remote.Port = RemotePort;\r | |
316 | Remote.Ip = RemoteIp;\r | |
317 | \r | |
318 | //\r | |
319 | // First check for exact match.\r | |
320 | //\r | |
321 | NET_LIST_FOR_EACH (Entry, &mTcpRunQue) {\r | |
322 | Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
323 | \r | |
324 | if (TCP_PEER_EQUAL (&Remote, &Tcb->RemoteEnd) &&\r | |
325 | TCP_PEER_EQUAL (&Local, &Tcb->LocalEnd)) {\r | |
326 | \r | |
e48e37fc | 327 | RemoveEntryList (&Tcb->List);\r |
328 | InsertHeadList (&mTcpRunQue, &Tcb->List);\r | |
8a67d61d | 329 | \r |
330 | return Tcb;\r | |
331 | }\r | |
332 | }\r | |
333 | \r | |
334 | //\r | |
335 | // Only check listen queue when SYN flag is on\r | |
336 | //\r | |
337 | if (Syn) {\r | |
338 | return TcpLocateListenTcb (&Local, &Remote);\r | |
339 | }\r | |
340 | \r | |
341 | return NULL;\r | |
342 | }\r | |
343 | \r | |
344 | \r | |
345 | /**\r | |
346 | Insert a Tcb into the proper queue.\r | |
347 | \r | |
348 | @param Tcb Pointer to the TCP_CB to be inserted.\r | |
349 | \r | |
350 | @retval 0 The Tcb is inserted successfully.\r | |
351 | @retval -1 Error condition occurred.\r | |
352 | \r | |
353 | **/\r | |
354 | INTN\r | |
355 | TcpInsertTcb (\r | |
356 | IN TCP_CB *Tcb\r | |
357 | )\r | |
358 | {\r | |
e48e37fc | 359 | LIST_ENTRY *Entry;\r |
360 | LIST_ENTRY *Head;\r | |
8a67d61d | 361 | TCP_CB *Node;\r |
8a67d61d | 362 | \r |
363 | ASSERT (\r | |
120db52c | 364 | (Tcb != NULL) &&\r |
365 | ((Tcb->State == TCP_LISTEN) ||\r | |
366 | (Tcb->State == TCP_SYN_SENT) ||\r | |
367 | (Tcb->State == TCP_SYN_RCVD) ||\r | |
368 | (Tcb->State == TCP_CLOSED))\r | |
8a67d61d | 369 | );\r |
370 | \r | |
371 | if (Tcb->LocalEnd.Port == 0) {\r | |
372 | return -1;\r | |
373 | }\r | |
374 | \r | |
375 | Head = &mTcpRunQue;\r | |
376 | \r | |
377 | if (Tcb->State == TCP_LISTEN) {\r | |
378 | Head = &mTcpListenQue;\r | |
379 | }\r | |
380 | \r | |
381 | //\r | |
382 | // Check that Tcb isn't already on the list.\r | |
383 | //\r | |
384 | NET_LIST_FOR_EACH (Entry, Head) {\r | |
385 | Node = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);\r | |
386 | \r | |
387 | if (TCP_PEER_EQUAL (&Tcb->LocalEnd, &Node->LocalEnd) &&\r | |
388 | TCP_PEER_EQUAL (&Tcb->RemoteEnd, &Node->RemoteEnd)) {\r | |
389 | \r | |
390 | return -1;\r | |
391 | }\r | |
392 | }\r | |
393 | \r | |
e48e37fc | 394 | InsertHeadList (Head, &Tcb->List);\r |
8a67d61d | 395 | \r |
8a67d61d | 396 | return 0;\r |
397 | }\r | |
398 | \r | |
399 | \r | |
400 | /**\r | |
dfc1f033 | 401 | Clone a TCB_CB from Tcb.\r |
8a67d61d | 402 | \r |
403 | @param Tcb Pointer to the TCP_CB to be cloned.\r | |
404 | \r | |
120db52c | 405 | @return Pointer to the new cloned TCP_CB, if NULL error condition occurred.\r |
8a67d61d | 406 | \r |
407 | **/\r | |
408 | TCP_CB *\r | |
409 | TcpCloneTcb (\r | |
410 | IN TCP_CB *Tcb\r | |
411 | )\r | |
412 | {\r | |
413 | TCP_CB *Clone;\r | |
414 | \r | |
e48e37fc | 415 | Clone = AllocatePool (sizeof (TCP_CB));\r |
8a67d61d | 416 | \r |
417 | if (Clone == NULL) {\r | |
418 | return NULL;\r | |
419 | \r | |
420 | }\r | |
421 | \r | |
e48e37fc | 422 | CopyMem (Clone, Tcb, sizeof (TCP_CB));\r |
8a67d61d | 423 | \r |
424 | //\r | |
425 | // Increate the reference count of the shared IpInfo.\r | |
426 | //\r | |
427 | NET_GET_REF (Tcb->IpInfo);\r | |
428 | \r | |
e48e37fc | 429 | InitializeListHead (&Clone->List);\r |
430 | InitializeListHead (&Clone->SndQue);\r | |
431 | InitializeListHead (&Clone->RcvQue);\r | |
8a67d61d | 432 | \r |
433 | Clone->Sk = SockClone (Tcb->Sk);\r | |
434 | if (Clone->Sk == NULL) {\r | |
e48e37fc | 435 | DEBUG ((EFI_D_ERROR, "TcpCloneTcb: failed to clone a sock\n"));\r |
766c7483 | 436 | FreePool (Clone);\r |
8a67d61d | 437 | return NULL;\r |
438 | }\r | |
439 | \r | |
440 | ((TCP4_PROTO_DATA *) (Clone->Sk->ProtoReserved))->TcpPcb = Clone;\r | |
441 | \r | |
442 | return Clone;\r | |
443 | }\r | |
444 | \r | |
445 | \r | |
446 | /**\r | |
447 | Compute an ISS to be used by a new connection.\r | |
448 | \r | |
120db52c | 449 | @return The result ISS.\r |
8a67d61d | 450 | \r |
451 | **/\r | |
452 | TCP_SEQNO\r | |
453 | TcpGetIss (\r | |
454 | VOID\r | |
455 | )\r | |
456 | {\r | |
457 | mTcpGlobalIss += 2048;\r | |
458 | return mTcpGlobalIss;\r | |
459 | }\r | |
460 | \r | |
461 | \r | |
462 | /**\r | |
463 | Get the local mss.\r | |
464 | \r | |
85511ddf | 465 | @param Sock Pointer to the socket to get mss\r |
8a67d61d | 466 | \r |
120db52c | 467 | @return The mss size.\r |
8a67d61d | 468 | \r |
469 | **/\r | |
470 | UINT16\r | |
471 | TcpGetRcvMss (\r | |
472 | IN SOCKET *Sock\r | |
473 | )\r | |
474 | {\r | |
a1503a32 | 475 | EFI_IP4_MODE_DATA Ip4Mode;\r |
8a67d61d | 476 | TCP4_PROTO_DATA *TcpProto;\r |
477 | EFI_IP4_PROTOCOL *Ip;\r | |
478 | \r | |
120db52c | 479 | ASSERT (Sock != NULL);\r |
8a67d61d | 480 | \r |
481 | TcpProto = (TCP4_PROTO_DATA *) Sock->ProtoReserved;\r | |
2a2e33b2 | 482 | Ip = TcpProto->TcpService->IpIo->Ip.Ip4;\r |
120db52c | 483 | ASSERT (Ip != NULL);\r |
8a67d61d | 484 | \r |
a1503a32 | 485 | Ip->GetModeData (Ip, &Ip4Mode, NULL, NULL);\r |
8a67d61d | 486 | \r |
a1503a32 | 487 | return (UINT16) (Ip4Mode.MaxPacketSize - sizeof (TCP_HEAD));\r |
8a67d61d | 488 | }\r |
489 | \r | |
490 | \r | |
491 | /**\r | |
492 | Set the Tcb's state.\r | |
493 | \r | |
494 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
495 | @param State The state to be set.\r | |
496 | \r | |
8a67d61d | 497 | **/\r |
498 | VOID\r | |
499 | TcpSetState (\r | |
77f00155 | 500 | IN OUT TCP_CB *Tcb,\r |
501 | IN UINT8 State\r | |
8a67d61d | 502 | )\r |
503 | {\r | |
9c4a5f74 | 504 | ASSERT (Tcb->State < (sizeof (mTcpStateName) / sizeof (CHAR16 *)));\r |
505 | ASSERT (State < (sizeof (mTcpStateName) / sizeof (CHAR16 *)));\r | |
506 | \r | |
e48e37fc | 507 | DEBUG (\r |
dea6914d | 508 | (EFI_D_NET,\r |
0e549d5b | 509 | "Tcb (%p) state %s --> %s\n",\r |
8a67d61d | 510 | Tcb,\r |
511 | mTcpStateName[Tcb->State],\r | |
512 | mTcpStateName[State])\r | |
513 | );\r | |
514 | \r | |
276dcc1b | 515 | Tcb->State = State;\r |
8a67d61d | 516 | \r |
517 | switch (State) {\r | |
518 | case TCP_ESTABLISHED:\r | |
519 | \r | |
520 | SockConnEstablished (Tcb->Sk);\r | |
e5e12de7 | 521 | \r |
522 | if (Tcb->Parent != NULL) {\r | |
523 | //\r | |
524 | // A new connection is accepted by a listening socket, install\r | |
525 | // the device path.\r | |
526 | //\r | |
527 | TcpInstallDevicePath (Tcb->Sk);\r | |
528 | }\r | |
529 | \r | |
8a67d61d | 530 | break;\r |
531 | \r | |
532 | case TCP_CLOSED:\r | |
533 | \r | |
534 | SockConnClosed (Tcb->Sk);\r | |
535 | \r | |
dfc1f033 | 536 | break;\r |
dfa596b8 | 537 | default:\r |
8a67d61d | 538 | break;\r |
539 | }\r | |
540 | }\r | |
541 | \r | |
542 | \r | |
543 | /**\r | |
544 | Compute the TCP segment's checksum.\r | |
545 | \r | |
546 | @param Nbuf Pointer to the buffer that contains the TCP\r | |
547 | segment.\r | |
548 | @param HeadSum The checksum value of the fixed part of pseudo\r | |
549 | header.\r | |
550 | \r | |
120db52c | 551 | @return The checksum value.\r |
8a67d61d | 552 | \r |
553 | **/\r | |
554 | UINT16\r | |
555 | TcpChecksum (\r | |
556 | IN NET_BUF *Nbuf,\r | |
557 | IN UINT16 HeadSum\r | |
558 | )\r | |
559 | {\r | |
560 | UINT16 Checksum;\r | |
561 | \r | |
562 | Checksum = NetbufChecksum (Nbuf);\r | |
563 | Checksum = NetAddChecksum (Checksum, HeadSum);\r | |
564 | \r | |
120db52c | 565 | Checksum = NetAddChecksum (\r |
566 | Checksum,\r | |
567 | HTONS ((UINT16) Nbuf->TotalSize)\r | |
568 | );\r | |
8a67d61d | 569 | \r |
4eb65aff | 570 | return (UINT16) ~Checksum;\r |
8a67d61d | 571 | }\r |
572 | \r | |
8a67d61d | 573 | /**\r |
574 | Translate the information from the head of the received TCP\r | |
575 | segment Nbuf contains and fill it into a TCP_SEG structure.\r | |
576 | \r | |
577 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
578 | @param Nbuf Pointer to the buffer contains the TCP segment.\r | |
579 | \r | |
120db52c | 580 | @return Pointer to the TCP_SEG that contains the translated TCP head information.\r |
8a67d61d | 581 | \r |
582 | **/\r | |
583 | TCP_SEG *\r | |
584 | TcpFormatNetbuf (\r | |
77f00155 | 585 | IN TCP_CB *Tcb,\r |
586 | IN OUT NET_BUF *Nbuf\r | |
8a67d61d | 587 | )\r |
588 | {\r | |
589 | TCP_SEG *Seg;\r | |
590 | TCP_HEAD *Head;\r | |
591 | \r | |
592 | Seg = TCPSEG_NETBUF (Nbuf);\r | |
593 | Head = (TCP_HEAD *) NetbufGetByte (Nbuf, 0, NULL);\r | |
a56b6e03 | 594 | ASSERT (Head != NULL);\r |
8a67d61d | 595 | Nbuf->Tcp = Head;\r |
596 | \r | |
597 | Seg->Seq = NTOHL (Head->Seq);\r | |
598 | Seg->Ack = NTOHL (Head->Ack);\r | |
599 | Seg->End = Seg->Seq + (Nbuf->TotalSize - (Head->HeadLen << 2));\r | |
600 | \r | |
601 | Seg->Urg = NTOHS (Head->Urg);\r | |
602 | Seg->Wnd = (NTOHS (Head->Wnd) << Tcb->SndWndScale);\r | |
603 | Seg->Flag = Head->Flag;\r | |
604 | \r | |
605 | //\r | |
606 | // SYN and FIN flag occupy one sequence space each.\r | |
607 | //\r | |
608 | if (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN)) {\r | |
609 | //\r | |
610 | // RFC requires that initial window not be scaled\r | |
611 | //\r | |
612 | Seg->Wnd = NTOHS (Head->Wnd);\r | |
613 | Seg->End++;\r | |
614 | }\r | |
615 | \r | |
616 | if (TCP_FLG_ON (Seg->Flag, TCP_FLG_FIN)) {\r | |
617 | Seg->End++;\r | |
618 | }\r | |
619 | \r | |
620 | return Seg;\r | |
621 | }\r | |
622 | \r | |
623 | \r | |
624 | /**\r | |
625 | Reset the connection related with Tcb.\r | |
626 | \r | |
627 | @param Tcb Pointer to the TCP_CB of the connection to be\r | |
628 | reset.\r | |
629 | \r | |
8a67d61d | 630 | **/\r |
631 | VOID\r | |
632 | TcpResetConnection (\r | |
633 | IN TCP_CB *Tcb\r | |
634 | )\r | |
635 | {\r | |
636 | NET_BUF *Nbuf;\r | |
637 | TCP_HEAD *Nhead;\r | |
638 | \r | |
639 | Nbuf = NetbufAlloc (TCP_MAX_HEAD);\r | |
640 | \r | |
641 | if (Nbuf == NULL) {\r | |
642 | return ;\r | |
643 | }\r | |
644 | \r | |
645 | Nhead = (TCP_HEAD *) NetbufAllocSpace (\r | |
646 | Nbuf,\r | |
647 | sizeof (TCP_HEAD),\r | |
648 | NET_BUF_TAIL\r | |
649 | );\r | |
650 | \r | |
651 | ASSERT (Nhead != NULL);\r | |
652 | \r | |
653 | Nbuf->Tcp = Nhead;\r | |
654 | \r | |
655 | Nhead->Flag = TCP_FLG_RST;\r | |
656 | Nhead->Seq = HTONL (Tcb->SndNxt);\r | |
657 | Nhead->Ack = HTONL (Tcb->RcvNxt);\r | |
658 | Nhead->SrcPort = Tcb->LocalEnd.Port;\r | |
659 | Nhead->DstPort = Tcb->RemoteEnd.Port;\r | |
c9325700 | 660 | Nhead->HeadLen = (UINT8) (sizeof (TCP_HEAD) >> 2);\r |
8a67d61d | 661 | Nhead->Res = 0;\r |
662 | Nhead->Wnd = HTONS (0xFFFF);\r | |
663 | Nhead->Checksum = 0;\r | |
664 | Nhead->Urg = 0;\r | |
665 | Nhead->Checksum = TcpChecksum (Nbuf, Tcb->HeadSum);\r | |
666 | \r | |
667 | TcpSendIpPacket (Tcb, Nbuf, Tcb->LocalEnd.Ip, Tcb->RemoteEnd.Ip);\r | |
668 | \r | |
669 | NetbufFree (Nbuf);\r | |
670 | }\r | |
671 | \r | |
672 | \r | |
673 | /**\r | |
120db52c | 674 | Initialize an active connection.\r |
8a67d61d | 675 | \r |
676 | @param Tcb Pointer to the TCP_CB that wants to initiate a\r | |
677 | connection.\r | |
678 | \r | |
8a67d61d | 679 | **/\r |
680 | VOID\r | |
681 | TcpOnAppConnect (\r | |
77f00155 | 682 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 683 | )\r |
684 | {\r | |
685 | TcpInitTcbLocal (Tcb);\r | |
686 | TcpSetState (Tcb, TCP_SYN_SENT);\r | |
687 | \r | |
688 | TcpSetTimer (Tcb, TCP_TIMER_CONNECT, Tcb->ConnectTimeout);\r | |
689 | TcpToSendData (Tcb, 1);\r | |
690 | }\r | |
691 | \r | |
692 | \r | |
693 | /**\r | |
694 | Initiate the connection close procedure, called when\r | |
695 | applications want to close the connection.\r | |
696 | \r | |
697 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
698 | \r | |
8a67d61d | 699 | **/\r |
700 | VOID\r | |
701 | TcpOnAppClose (\r | |
77f00155 | 702 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 703 | )\r |
704 | {\r | |
120db52c | 705 | ASSERT (Tcb != NULL);\r |
8a67d61d | 706 | \r |
120db52c | 707 | if (!IsListEmpty (&Tcb->RcvQue) || GET_RCV_DATASIZE (Tcb->Sk) != 0) {\r |
8a67d61d | 708 | \r |
e48e37fc | 709 | DEBUG ((EFI_D_WARN, "TcpOnAppClose: connection reset "\r |
0e549d5b | 710 | "because data is lost for TCB %p\n", Tcb));\r |
8a67d61d | 711 | \r |
712 | TcpResetConnection (Tcb);\r | |
713 | TcpClose (Tcb);\r | |
714 | return;\r | |
715 | }\r | |
716 | \r | |
717 | switch (Tcb->State) {\r | |
718 | case TCP_CLOSED:\r | |
719 | case TCP_LISTEN:\r | |
720 | case TCP_SYN_SENT:\r | |
721 | TcpSetState (Tcb, TCP_CLOSED);\r | |
722 | break;\r | |
723 | \r | |
724 | case TCP_SYN_RCVD:\r | |
725 | case TCP_ESTABLISHED:\r | |
726 | TcpSetState (Tcb, TCP_FIN_WAIT_1);\r | |
727 | break;\r | |
728 | \r | |
729 | case TCP_CLOSE_WAIT:\r | |
730 | TcpSetState (Tcb, TCP_LAST_ACK);\r | |
731 | break;\r | |
dfa596b8 | 732 | default:\r |
dfc1f033 | 733 | break;\r |
8a67d61d | 734 | }\r |
735 | \r | |
736 | TcpToSendData (Tcb, 1);\r | |
737 | }\r | |
738 | \r | |
739 | \r | |
740 | /**\r | |
120db52c | 741 | Check whether the application's newly delivered data can be sent out.\r |
8a67d61d | 742 | \r |
743 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
744 | \r | |
745 | @retval 0 Whether the data is sent out or is buffered for\r | |
746 | further sending.\r | |
747 | @retval -1 The Tcb is not in a state that data is permitted to\r | |
748 | be sent out.\r | |
749 | \r | |
750 | **/\r | |
751 | INTN\r | |
752 | TcpOnAppSend (\r | |
77f00155 | 753 | IN OUT TCP_CB *Tcb\r |
8a67d61d | 754 | )\r |
755 | {\r | |
756 | \r | |
757 | switch (Tcb->State) {\r | |
758 | case TCP_CLOSED:\r | |
759 | return -1;\r | |
8a67d61d | 760 | \r |
761 | case TCP_LISTEN:\r | |
762 | return -1;\r | |
8a67d61d | 763 | \r |
764 | case TCP_SYN_SENT:\r | |
765 | case TCP_SYN_RCVD:\r | |
766 | return 0;\r | |
8a67d61d | 767 | \r |
768 | case TCP_ESTABLISHED:\r | |
769 | case TCP_CLOSE_WAIT:\r | |
770 | TcpToSendData (Tcb, 0);\r | |
771 | return 0;\r | |
8a67d61d | 772 | \r |
773 | case TCP_FIN_WAIT_1:\r | |
774 | case TCP_FIN_WAIT_2:\r | |
775 | case TCP_CLOSING:\r | |
776 | case TCP_LAST_ACK:\r | |
777 | case TCP_TIME_WAIT:\r | |
778 | return -1;\r | |
77f00155 | 779 | \r |
dfa596b8 | 780 | default:\r |
dfc1f033 | 781 | break;\r |
8a67d61d | 782 | }\r |
783 | \r | |
784 | return 0;\r | |
785 | }\r | |
786 | \r | |
787 | \r | |
788 | /**\r | |
789 | Application has consumed some data, check whether\r | |
790 | to send a window updata ack or a delayed ack.\r | |
791 | \r | |
792 | @param Tcb Pointer to the TCP_CB of this TCP instance.\r | |
793 | \r | |
8a67d61d | 794 | **/\r |
276dcc1b | 795 | VOID\r |
8a67d61d | 796 | TcpOnAppConsume (\r |
797 | IN TCP_CB *Tcb\r | |
798 | )\r | |
799 | {\r | |
4eb65aff | 800 | UINT32 TcpOld;\r |
8a67d61d | 801 | \r |
802 | switch (Tcb->State) {\r | |
803 | case TCP_CLOSED:\r | |
276dcc1b | 804 | return;\r |
8a67d61d | 805 | \r |
806 | case TCP_LISTEN:\r | |
276dcc1b | 807 | return;\r |
8a67d61d | 808 | \r |
809 | case TCP_SYN_SENT:\r | |
810 | case TCP_SYN_RCVD:\r | |
276dcc1b | 811 | return;\r |
8a67d61d | 812 | \r |
813 | case TCP_ESTABLISHED:\r | |
4eb65aff | 814 | TcpOld = TcpRcvWinOld (Tcb);\r |
815 | if (TcpRcvWinNow (Tcb) > TcpOld) {\r | |
8a67d61d | 816 | \r |
4eb65aff | 817 | if (TcpOld < Tcb->RcvMss) {\r |
8a67d61d | 818 | \r |
dea6914d | 819 | DEBUG ((EFI_D_NET, "TcpOnAppConsume: send a window"\r |
dfc1f033 | 820 | " update for a window closed Tcb %p\n", Tcb));\r |
8a67d61d | 821 | \r |
822 | TcpSendAck (Tcb);\r | |
823 | } else if (Tcb->DelayedAck == 0) {\r | |
824 | \r | |
dea6914d | 825 | DEBUG ((EFI_D_NET, "TcpOnAppConsume: scheduled a delayed"\r |
dfc1f033 | 826 | " ACK to update window for Tcb %p\n", Tcb));\r |
8a67d61d | 827 | \r |
828 | Tcb->DelayedAck = 1;\r | |
829 | }\r | |
830 | }\r | |
831 | \r | |
832 | break;\r | |
833 | \r | |
834 | case TCP_CLOSE_WAIT:\r | |
276dcc1b | 835 | return;\r |
8a67d61d | 836 | \r |
837 | case TCP_FIN_WAIT_1:\r | |
838 | case TCP_FIN_WAIT_2:\r | |
839 | case TCP_CLOSING:\r | |
840 | case TCP_LAST_ACK:\r | |
841 | case TCP_TIME_WAIT:\r | |
276dcc1b | 842 | return;\r |
c191cdd1 | 843 | \r |
844 | default:\r | |
845 | break;\r | |
8a67d61d | 846 | }\r |
8a67d61d | 847 | }\r |
848 | \r | |
849 | \r | |
850 | /**\r | |
851 | Abort the connection by sending a reset segment, called\r | |
852 | when the application wants to abort the connection.\r | |
853 | \r | |
854 | @param Tcb Pointer to the TCP_CB of the TCP instance.\r | |
855 | \r | |
8a67d61d | 856 | **/\r |
857 | VOID\r | |
858 | TcpOnAppAbort (\r | |
859 | IN TCP_CB *Tcb\r | |
860 | )\r | |
861 | {\r | |
e48e37fc | 862 | DEBUG ((EFI_D_WARN, "TcpOnAppAbort: connection reset "\r |
0e549d5b | 863 | "issued by application for TCB %p\n", Tcb));\r |
8a67d61d | 864 | \r |
865 | switch (Tcb->State) {\r | |
866 | case TCP_SYN_RCVD:\r | |
867 | case TCP_ESTABLISHED:\r | |
868 | case TCP_FIN_WAIT_1:\r | |
869 | case TCP_FIN_WAIT_2:\r | |
870 | case TCP_CLOSE_WAIT:\r | |
871 | TcpResetConnection (Tcb);\r | |
872 | break;\r | |
77f00155 | 873 | default:\r |
874 | break;\r | |
8a67d61d | 875 | }\r |
876 | \r | |
877 | TcpSetState (Tcb, TCP_CLOSED);\r | |
878 | }\r | |
879 | \r | |
120db52c | 880 | /**\r |
e5e12de7 | 881 | Install the device path protocol on the TCP instance.\r |
882 | \r | |
120db52c | 883 | @param Sock Pointer to the socket representing the TCP instance.\r |
e5e12de7 | 884 | \r |
120db52c | 885 | @retval EFI_SUCCESS The device path protocol is installed.\r |
886 | @retval other Failed to install the device path protocol.\r | |
e5e12de7 | 887 | \r |
120db52c | 888 | **/\r |
889 | EFI_STATUS\r | |
890 | TcpInstallDevicePath (\r | |
891 | IN SOCKET *Sock\r | |
892 | )\r | |
e5e12de7 | 893 | {\r |
894 | TCP4_PROTO_DATA *TcpProto;\r | |
895 | TCP4_SERVICE_DATA *TcpService;\r | |
896 | TCP_CB *Tcb;\r | |
897 | IPv4_DEVICE_PATH Ip4DPathNode;\r | |
898 | EFI_STATUS Status;\r | |
1204fe83 | 899 | TCP_PORTNO LocalPort;\r |
900 | TCP_PORTNO RemotePort;\r | |
e5e12de7 | 901 | \r |
902 | TcpProto = (TCP4_PROTO_DATA *) Sock->ProtoReserved;\r | |
903 | TcpService = TcpProto->TcpService;\r | |
904 | Tcb = TcpProto->TcpPcb;\r | |
905 | \r | |
1204fe83 | 906 | LocalPort = NTOHS (Tcb->LocalEnd.Port);\r |
907 | RemotePort = NTOHS (Tcb->RemoteEnd.Port);\r | |
e5e12de7 | 908 | NetLibCreateIPv4DPathNode (\r |
909 | &Ip4DPathNode,\r | |
910 | TcpService->ControllerHandle,\r | |
911 | Tcb->LocalEnd.Ip,\r | |
1204fe83 | 912 | LocalPort,\r |
e5e12de7 | 913 | Tcb->RemoteEnd.Ip,\r |
1204fe83 | 914 | RemotePort,\r |
e5e12de7 | 915 | EFI_IP_PROTO_TCP,\r |
916 | Tcb->UseDefaultAddr\r | |
917 | );\r | |
918 | \r | |
501793fa RN |
919 | IP4_COPY_ADDRESS (&Ip4DPathNode.SubnetMask, &Tcb->SubnetMask);\r |
920 | \r | |
e5e12de7 | 921 | Sock->DevicePath = AppendDevicePathNode (\r |
120db52c | 922 | Sock->ParentDevicePath,\r |
923 | (EFI_DEVICE_PATH_PROTOCOL *) &Ip4DPathNode\r | |
924 | );\r | |
e5e12de7 | 925 | if (Sock->DevicePath == NULL) {\r |
926 | return EFI_OUT_OF_RESOURCES;\r | |
927 | }\r | |
928 | \r | |
929 | Status = gBS->InstallProtocolInterface (\r | |
930 | &Sock->SockHandle,\r | |
931 | &gEfiDevicePathProtocolGuid,\r | |
932 | EFI_NATIVE_INTERFACE,\r | |
933 | Sock->DevicePath\r | |
934 | );\r | |
935 | if (EFI_ERROR (Status)) {\r | |
766c7483 | 936 | FreePool (Sock->DevicePath);\r |
e5e12de7 | 937 | }\r |
938 | \r | |
939 | return Status;\r | |
940 | }\r |