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cbf316f2 | 1 | /** @file\r |
3e7104c2 | 2 | Network library.\r |
3 | \r | |
4 | Copyright (c) 2005 - 2006, Intel Corporation.<BR>\r | |
cbf316f2 | 5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
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 | |
cbf316f2 | 12 | **/\r |
13 | \r | |
3e7104c2 | 14 | #include <Uefi.h>\r |
f5acf5c6 | 15 | \r |
16 | #include <Library/NetLib.h>\r | |
17 | #include <Library/BaseLib.h>\r | |
18 | #include <Library/DebugLib.h>\r | |
19 | #include <Library/BaseMemoryLib.h>\r | |
20 | #include <Library/UefiBootServicesTableLib.h>\r | |
cbf316f2 | 21 | #include <Library/MemoryAllocationLib.h>\r |
22 | \r | |
23 | \r | |
24 | /**\r | |
25 | Allocate and build up the sketch for a NET_BUF. The net buffer allocated\r | |
26 | has the BlockOpNum's NET_BLOCK_OP, and its associated NET_VECTOR has the\r | |
27 | BlockNum's NET_BLOCK.\r | |
28 | \r | |
3e7104c2 | 29 | @param[in] BlockNum The number of NET_BLOCK in the Vector of net buffer\r |
30 | @param[in] BlockOpNum The number of NET_BLOCK_OP in the net buffer\r | |
cbf316f2 | 31 | \r |
3e7104c2 | 32 | @return Pointer to the allocated NET_BUF. If NULL, the\r |
cbf316f2 | 33 | allocation failed due to resource limit.\r |
34 | \r | |
35 | **/\r | |
cbf316f2 | 36 | NET_BUF *\r |
37 | NetbufAllocStruct (\r | |
38 | IN UINT32 BlockNum,\r | |
39 | IN UINT32 BlockOpNum\r | |
40 | )\r | |
41 | {\r | |
42 | NET_BUF *Nbuf;\r | |
43 | NET_VECTOR *Vector;\r | |
44 | \r | |
45 | ASSERT (BlockOpNum >= 1);\r | |
46 | \r | |
47 | //\r | |
48 | // Allocate three memory blocks.\r | |
49 | //\r | |
e48e37fc | 50 | Nbuf = AllocateZeroPool (NET_BUF_SIZE (BlockOpNum));\r |
cbf316f2 | 51 | \r |
52 | if (Nbuf == NULL) {\r | |
53 | return NULL;\r | |
54 | }\r | |
55 | \r | |
56 | Nbuf->Signature = NET_BUF_SIGNATURE;\r | |
57 | Nbuf->RefCnt = 1;\r | |
58 | Nbuf->BlockOpNum = BlockOpNum;\r | |
e48e37fc | 59 | InitializeListHead (&Nbuf->List);\r |
cbf316f2 | 60 | \r |
61 | if (BlockNum != 0) {\r | |
e48e37fc | 62 | Vector = AllocateZeroPool (NET_VECTOR_SIZE (BlockNum));\r |
cbf316f2 | 63 | \r |
64 | if (Vector == NULL) {\r | |
65 | goto FreeNbuf;\r | |
66 | }\r | |
67 | \r | |
68 | Vector->Signature = NET_VECTOR_SIGNATURE;\r | |
69 | Vector->RefCnt = 1;\r | |
70 | Vector->BlockNum = BlockNum;\r | |
71 | Nbuf->Vector = Vector;\r | |
72 | }\r | |
73 | \r | |
74 | return Nbuf;\r | |
75 | \r | |
76 | FreeNbuf:\r | |
77 | \r | |
e48e37fc | 78 | gBS->FreePool (Nbuf);\r |
cbf316f2 | 79 | return NULL;\r |
80 | }\r | |
81 | \r | |
82 | \r | |
83 | /**\r | |
84 | Allocate a single block NET_BUF. Upon allocation, all the\r | |
85 | free space is in the tail room.\r | |
86 | \r | |
3e7104c2 | 87 | @param[in] Len The length of the block.\r |
cbf316f2 | 88 | \r |
3e7104c2 | 89 | @return Pointer to the allocated NET_BUF. If NULL the\r |
cbf316f2 | 90 | allocation failed due to resource limit.\r |
91 | \r | |
92 | **/\r | |
93 | NET_BUF *\r | |
7b414b4e | 94 | EFIAPI\r |
cbf316f2 | 95 | NetbufAlloc (\r |
96 | IN UINT32 Len\r | |
97 | )\r | |
98 | {\r | |
99 | NET_BUF *Nbuf;\r | |
100 | NET_VECTOR *Vector;\r | |
101 | UINT8 *Bulk;\r | |
102 | \r | |
103 | ASSERT (Len > 0);\r | |
104 | \r | |
105 | Nbuf = NetbufAllocStruct (1, 1);\r | |
106 | \r | |
107 | if (Nbuf == NULL) {\r | |
108 | return NULL;\r | |
109 | }\r | |
110 | \r | |
e48e37fc | 111 | Bulk = AllocatePool (Len);\r |
cbf316f2 | 112 | \r |
113 | if (Bulk == NULL) {\r | |
114 | goto FreeNBuf;\r | |
115 | }\r | |
116 | \r | |
117 | Vector = Nbuf->Vector;\r | |
118 | Vector->Len = Len;\r | |
119 | \r | |
120 | Vector->Block[0].Bulk = Bulk;\r | |
121 | Vector->Block[0].Len = Len;\r | |
122 | \r | |
123 | Nbuf->BlockOp[0].BlockHead = Bulk;\r | |
124 | Nbuf->BlockOp[0].BlockTail = Bulk + Len;\r | |
125 | \r | |
126 | Nbuf->BlockOp[0].Head = Bulk;\r | |
127 | Nbuf->BlockOp[0].Tail = Bulk;\r | |
128 | Nbuf->BlockOp[0].Size = 0;\r | |
129 | \r | |
130 | return Nbuf;\r | |
131 | \r | |
132 | FreeNBuf:\r | |
e48e37fc | 133 | gBS->FreePool (Nbuf);\r |
cbf316f2 | 134 | return NULL;\r |
135 | }\r | |
136 | \r | |
137 | \r | |
138 | /**\r | |
3e7104c2 | 139 | Free the vector.\r |
cbf316f2 | 140 | \r |
3e7104c2 | 141 | @param[in] Vector Pointer to the NET_VECTOR to be freed.\r |
cbf316f2 | 142 | \r |
143 | **/\r | |
cbf316f2 | 144 | VOID\r |
145 | NetbufFreeVector (\r | |
146 | IN NET_VECTOR *Vector\r | |
147 | )\r | |
148 | {\r | |
149 | UINT32 Index;\r | |
150 | \r | |
151 | NET_CHECK_SIGNATURE (Vector, NET_VECTOR_SIGNATURE);\r | |
152 | ASSERT (Vector->RefCnt > 0);\r | |
153 | \r | |
154 | Vector->RefCnt--;\r | |
155 | \r | |
156 | if (Vector->RefCnt > 0) {\r | |
157 | return;\r | |
158 | }\r | |
159 | \r | |
160 | if (Vector->Free != NULL) {\r | |
161 | //\r | |
162 | // Call external free function to free the vector if it\r | |
163 | // isn't NULL. If NET_VECTOR_OWN_FIRST is set, release the\r | |
164 | // first block since it is allocated by us\r | |
165 | //\r | |
166 | if (Vector->Flag & NET_VECTOR_OWN_FIRST) {\r | |
e48e37fc | 167 | gBS->FreePool (Vector->Block[0].Bulk);\r |
cbf316f2 | 168 | }\r |
169 | \r | |
170 | Vector->Free (Vector->Arg);\r | |
171 | \r | |
172 | } else {\r | |
173 | //\r | |
174 | // Free each memory block associated with the Vector\r | |
175 | //\r | |
176 | for (Index = 0; Index < Vector->BlockNum; Index++) {\r | |
e48e37fc | 177 | gBS->FreePool (Vector->Block[Index].Bulk);\r |
cbf316f2 | 178 | }\r |
179 | }\r | |
180 | \r | |
e48e37fc | 181 | gBS->FreePool (Vector);\r |
cbf316f2 | 182 | }\r |
183 | \r | |
184 | \r | |
185 | /**\r | |
186 | Free the buffer and its associated NET_VECTOR.\r | |
187 | \r | |
3e7104c2 | 188 | @param[in] Nbuf Pointer to the NET_BUF to be freed.\r |
cbf316f2 | 189 | \r |
190 | **/\r | |
191 | VOID\r | |
7b414b4e | 192 | EFIAPI\r |
cbf316f2 | 193 | NetbufFree (\r |
194 | IN NET_BUF *Nbuf\r | |
195 | )\r | |
196 | {\r | |
197 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
198 | ASSERT (Nbuf->RefCnt > 0);\r | |
199 | \r | |
200 | Nbuf->RefCnt--;\r | |
201 | \r | |
202 | if (Nbuf->RefCnt == 0) {\r | |
203 | //\r | |
204 | // Update Vector only when NBuf is to be released. That is,\r | |
205 | // all the sharing of Nbuf increse Vector's RefCnt by one\r | |
206 | //\r | |
207 | NetbufFreeVector (Nbuf->Vector);\r | |
e48e37fc | 208 | gBS->FreePool (Nbuf);\r |
cbf316f2 | 209 | }\r |
210 | }\r | |
211 | \r | |
212 | \r | |
213 | /**\r | |
214 | Create a copy of NET_BUF that share the associated NET_DATA.\r | |
215 | \r | |
3e7104c2 | 216 | @param[in] Nbuf Pointer to the net buffer to be cloned.\r |
cbf316f2 | 217 | \r |
3e7104c2 | 218 | @return Pointer to the cloned net buffer.If NULL, the\r |
219 | allocation failed due to resource limit.\r | |
cbf316f2 | 220 | \r |
221 | **/\r | |
222 | NET_BUF *\r | |
7b414b4e | 223 | EFIAPI\r |
cbf316f2 | 224 | NetbufClone (\r |
225 | IN NET_BUF *Nbuf\r | |
226 | )\r | |
227 | {\r | |
228 | NET_BUF *Clone;\r | |
229 | \r | |
230 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
231 | \r | |
e48e37fc | 232 | Clone = AllocatePool (NET_BUF_SIZE (Nbuf->BlockOpNum));\r |
cbf316f2 | 233 | \r |
234 | if (Clone == NULL) {\r | |
235 | return NULL;\r | |
236 | }\r | |
237 | \r | |
238 | Clone->Signature = NET_BUF_SIGNATURE;\r | |
239 | Clone->RefCnt = 1;\r | |
e48e37fc | 240 | InitializeListHead (&Clone->List);\r |
cbf316f2 | 241 | \r |
242 | Clone->Ip = Nbuf->Ip;\r | |
243 | Clone->Tcp = Nbuf->Tcp;\r | |
244 | \r | |
e48e37fc | 245 | CopyMem (Clone->ProtoData, Nbuf->ProtoData, NET_PROTO_DATA);\r |
cbf316f2 | 246 | \r |
247 | NET_GET_REF (Nbuf->Vector);\r | |
248 | \r | |
249 | Clone->Vector = Nbuf->Vector;\r | |
250 | Clone->BlockOpNum = Nbuf->BlockOpNum;\r | |
251 | Clone->TotalSize = Nbuf->TotalSize;\r | |
e48e37fc | 252 | CopyMem (Clone->BlockOp, Nbuf->BlockOp, sizeof (NET_BLOCK_OP) * Nbuf->BlockOpNum);\r |
cbf316f2 | 253 | \r |
254 | return Clone;\r | |
255 | }\r | |
256 | \r | |
257 | \r | |
258 | /**\r | |
259 | Create a duplicated copy of Nbuf, data is copied. Also leave some\r | |
260 | head space before the data.\r | |
261 | \r | |
3e7104c2 | 262 | @param[in] Nbuf Pointer to the net buffer to be cloned.\r |
263 | @param[in, out] Duplicate Pointer to the net buffer to duplicate to, if NULL\r | |
264 | a new net buffer is allocated.\r | |
265 | @param[in] HeadSpace Length of the head space to reserve.\r | |
cbf316f2 | 266 | \r |
3e7104c2 | 267 | @return Pointer to the duplicated net buffer.If NULL, the\r |
268 | allocation failed due to resource limit.\r | |
cbf316f2 | 269 | \r |
270 | **/\r | |
271 | NET_BUF *\r | |
7b414b4e | 272 | EFIAPI\r |
cbf316f2 | 273 | NetbufDuplicate (\r |
274 | IN NET_BUF *Nbuf,\r | |
3e7104c2 | 275 | IN OUT NET_BUF *Duplicate OPTIONAL,\r |
cbf316f2 | 276 | IN UINT32 HeadSpace\r |
277 | )\r | |
278 | {\r | |
279 | UINT8 *Dst;\r | |
280 | \r | |
281 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
282 | \r | |
283 | if (Duplicate == NULL) {\r | |
284 | Duplicate = NetbufAlloc (Nbuf->TotalSize + HeadSpace);\r | |
285 | }\r | |
286 | \r | |
287 | if (Duplicate == NULL) {\r | |
288 | return NULL;\r | |
289 | }\r | |
290 | \r | |
291 | //\r | |
292 | // Don't set the IP and TCP head point, since it is most\r | |
293 | // like that they are pointing to the memory of Nbuf.\r | |
294 | //\r | |
e48e37fc | 295 | CopyMem (Duplicate->ProtoData, Nbuf->ProtoData, NET_PROTO_DATA);\r |
cbf316f2 | 296 | NetbufReserve (Duplicate, HeadSpace);\r |
297 | \r | |
298 | Dst = NetbufAllocSpace (Duplicate, Nbuf->TotalSize, NET_BUF_TAIL);\r | |
299 | NetbufCopy (Nbuf, 0, Nbuf->TotalSize, Dst);\r | |
300 | \r | |
301 | return Duplicate;\r | |
302 | }\r | |
303 | \r | |
304 | \r | |
305 | /**\r | |
306 | Free a list of net buffers.\r | |
307 | \r | |
3e7104c2 | 308 | @param[in, out] Head Pointer to the head of linked net buffers.\r |
cbf316f2 | 309 | \r |
310 | **/\r | |
311 | VOID\r | |
7b414b4e | 312 | EFIAPI\r |
cbf316f2 | 313 | NetbufFreeList (\r |
3e7104c2 | 314 | IN OUT LIST_ENTRY *Head\r |
cbf316f2 | 315 | )\r |
316 | {\r | |
e48e37fc | 317 | LIST_ENTRY *Entry;\r |
318 | LIST_ENTRY *Next;\r | |
cbf316f2 | 319 | NET_BUF *Nbuf;\r |
320 | \r | |
321 | Entry = Head->ForwardLink;\r | |
322 | \r | |
323 | NET_LIST_FOR_EACH_SAFE (Entry, Next, Head) {\r | |
324 | Nbuf = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r | |
325 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
326 | \r | |
e48e37fc | 327 | RemoveEntryList (Entry);\r |
cbf316f2 | 328 | NetbufFree (Nbuf);\r |
329 | }\r | |
330 | \r | |
e48e37fc | 331 | ASSERT (IsListEmpty (Head));\r |
cbf316f2 | 332 | }\r |
333 | \r | |
334 | \r | |
335 | /**\r | |
336 | Get the position of some byte in the net buffer. This can be used\r | |
337 | to, for example, retrieve the IP header in the packet. It also\r | |
338 | returns the fragment that contains the byte which is used mainly by\r | |
339 | the buffer implementation itself.\r | |
340 | \r | |
3e7104c2 | 341 | @param[in] Nbuf Pointer to the net buffer.\r |
342 | @param[in] Offset The index or offset of the byte.\r | |
343 | @param[out] Index Index of the fragment that contains the block.\r | |
cbf316f2 | 344 | \r |
3e7104c2 | 345 | @return * Pointer to the nth byte of data in the net buffer.\r |
cbf316f2 | 346 | If NULL, there is no such data in the net buffer.\r |
347 | \r | |
348 | **/\r | |
349 | UINT8 *\r | |
7b414b4e | 350 | EFIAPI\r |
cbf316f2 | 351 | NetbufGetByte (\r |
352 | IN NET_BUF *Nbuf,\r | |
353 | IN UINT32 Offset,\r | |
354 | OUT UINT32 *Index OPTIONAL\r | |
355 | )\r | |
356 | {\r | |
357 | NET_BLOCK_OP *BlockOp;\r | |
358 | UINT32 Loop;\r | |
359 | UINT32 Len;\r | |
360 | \r | |
361 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
362 | \r | |
363 | if (Offset >= Nbuf->TotalSize) {\r | |
364 | return NULL;\r | |
365 | }\r | |
366 | \r | |
367 | BlockOp = Nbuf->BlockOp;\r | |
368 | Len = 0;\r | |
369 | \r | |
370 | for (Loop = 0; Loop < Nbuf->BlockOpNum; Loop++) {\r | |
371 | \r | |
372 | if (Len + BlockOp[Loop].Size <= Offset) {\r | |
373 | Len += BlockOp[Loop].Size;\r | |
374 | continue;\r | |
375 | }\r | |
376 | \r | |
377 | if (Index != NULL) {\r | |
378 | *Index = Loop;\r | |
379 | }\r | |
380 | \r | |
381 | return BlockOp[Loop].Head + (Offset - Len);\r | |
382 | }\r | |
383 | \r | |
384 | return NULL;\r | |
385 | }\r | |
386 | \r | |
387 | \r | |
388 | \r | |
389 | /**\r | |
390 | Set the NET_BLOCK and corresponding NET_BLOCK_OP in\r | |
391 | the buffer. All the pointers in NET_BLOCK and NET_BLOCK_OP\r | |
392 | are set to the bulk's head and tail respectively. So, this\r | |
393 | function alone can't be used by NetbufAlloc.\r | |
394 | \r | |
3e7104c2 | 395 | @param[in, out] Nbuf Pointer to the net buffer.\r |
396 | @param[in] Bulk Pointer to the data.\r | |
397 | @param[in] Len Length of the bulk data.\r | |
398 | @param[in] Index The data block index in the net buffer the bulk\r | |
399 | data should belong to.\r | |
400 | \r | |
cbf316f2 | 401 | **/\r |
cbf316f2 | 402 | VOID\r |
403 | NetbufSetBlock (\r | |
3e7104c2 | 404 | IN OUT NET_BUF *Nbuf,\r |
cbf316f2 | 405 | IN UINT8 *Bulk,\r |
406 | IN UINT32 Len,\r | |
407 | IN UINT32 Index\r | |
408 | )\r | |
409 | {\r | |
410 | NET_BLOCK_OP *BlockOp;\r | |
411 | NET_BLOCK *Block;\r | |
412 | \r | |
413 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
414 | NET_CHECK_SIGNATURE (Nbuf->Vector, NET_VECTOR_SIGNATURE);\r | |
415 | ASSERT (Index < Nbuf->BlockOpNum);\r | |
416 | \r | |
417 | Block = &(Nbuf->Vector->Block[Index]);\r | |
418 | BlockOp = &(Nbuf->BlockOp[Index]);\r | |
419 | Block->Len = Len;\r | |
420 | Block->Bulk = Bulk;\r | |
421 | BlockOp->BlockHead = Bulk;\r | |
422 | BlockOp->BlockTail = Bulk + Len;\r | |
423 | BlockOp->Head = Bulk;\r | |
424 | BlockOp->Tail = Bulk + Len;\r | |
425 | BlockOp->Size = Len;\r | |
426 | }\r | |
427 | \r | |
428 | \r | |
429 | \r | |
430 | /**\r | |
431 | Set the NET_BLOCK_OP in the buffer. The corresponding NET_BLOCK\r | |
432 | structure is left untouched. Some times, there is no 1:1 relationship\r | |
433 | between NET_BLOCK and NET_BLOCK_OP. For example, that in NetbufGetFragment.\r | |
434 | \r | |
3e7104c2 | 435 | @param[in, out] Nbuf Pointer to the net buffer.\r |
436 | @param[in] Bulk Pointer to the data.\r | |
437 | @param[in] Len Length of the bulk data.\r | |
438 | @param[in] Index The data block index in the net buffer the bulk\r | |
439 | data should belong to.\r | |
cbf316f2 | 440 | \r |
441 | **/\r | |
cbf316f2 | 442 | VOID\r |
443 | NetbufSetBlockOp (\r | |
3e7104c2 | 444 | IN OUT NET_BUF *Nbuf,\r |
cbf316f2 | 445 | IN UINT8 *Bulk,\r |
446 | IN UINT32 Len,\r | |
447 | IN UINT32 Index\r | |
448 | )\r | |
449 | {\r | |
450 | NET_BLOCK_OP *BlockOp;\r | |
451 | \r | |
452 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
453 | ASSERT (Index < Nbuf->BlockOpNum);\r | |
454 | \r | |
455 | BlockOp = &(Nbuf->BlockOp[Index]);\r | |
456 | BlockOp->BlockHead = Bulk;\r | |
457 | BlockOp->BlockTail = Bulk + Len;\r | |
458 | BlockOp->Head = Bulk;\r | |
459 | BlockOp->Tail = Bulk + Len;\r | |
460 | BlockOp->Size = Len;\r | |
461 | }\r | |
462 | \r | |
463 | \r | |
464 | /**\r | |
465 | Helper function for NetbufClone. It is necessary because NetbufGetFragment\r | |
466 | may allocate the first block to accomodate the HeadSpace and HeadLen. So, it\r | |
467 | need to create a new NET_VECTOR. But, we want to avoid data copy by sharing\r | |
468 | the old NET_VECTOR.\r | |
469 | \r | |
3e7104c2 | 470 | @param[in] Arg Point to the old NET_VECTOR.\r |
cbf316f2 | 471 | \r |
472 | **/\r | |
cbf316f2 | 473 | VOID\r |
474 | NetbufGetFragmentFree (\r | |
475 | IN VOID *Arg\r | |
476 | )\r | |
477 | {\r | |
478 | NET_VECTOR *Vector;\r | |
479 | \r | |
480 | Vector = (NET_VECTOR *)Arg;\r | |
481 | NetbufFreeVector (Vector);\r | |
482 | }\r | |
483 | \r | |
484 | \r | |
485 | \r | |
486 | /**\r | |
487 | Create a NET_BUF structure which contains Len byte data of\r | |
488 | Nbuf starting from Offset. A new NET_BUF structure will be\r | |
489 | created but the associated data in NET_VECTOR is shared.\r | |
490 | This function exists to do IP packet fragmentation.\r | |
491 | \r | |
3e7104c2 | 492 | @param[in] Nbuf Pointer to the net buffer to be cloned.\r |
493 | @param[in] Offset Starting point of the data to be included in new\r | |
494 | buffer.\r | |
495 | @param[in] Len How many data to include in new data.\r | |
496 | @param[in] HeadSpace How many bytes of head space to reserve for\r | |
497 | protocol header.\r | |
cbf316f2 | 498 | \r |
3e7104c2 | 499 | @return Pointer to the cloned net buffer.If NULL, the\r |
500 | allocation failed due to resource limit.\r | |
cbf316f2 | 501 | \r |
502 | **/\r | |
503 | NET_BUF *\r | |
7b414b4e | 504 | EFIAPI\r |
cbf316f2 | 505 | NetbufGetFragment (\r |
506 | IN NET_BUF *Nbuf,\r | |
507 | IN UINT32 Offset,\r | |
508 | IN UINT32 Len,\r | |
509 | IN UINT32 HeadSpace\r | |
510 | )\r | |
511 | {\r | |
512 | NET_BUF *Child;\r | |
513 | NET_VECTOR *Vector;\r | |
514 | NET_BLOCK_OP *BlockOp;\r | |
515 | UINT32 CurBlockOp;\r | |
516 | UINT32 BlockOpNum;\r | |
517 | UINT8 *FirstBulk;\r | |
518 | UINT32 Index;\r | |
519 | UINT32 First;\r | |
520 | UINT32 Last;\r | |
521 | UINT32 FirstSkip;\r | |
522 | UINT32 FirstLen;\r | |
523 | UINT32 LastLen;\r | |
524 | UINT32 Cur;\r | |
525 | \r | |
526 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
527 | \r | |
528 | if ((Len == 0) || (Offset + Len > Nbuf->TotalSize)) {\r | |
529 | return NULL;\r | |
530 | }\r | |
531 | \r | |
532 | //\r | |
533 | // First find the first and last BlockOp that contains\r | |
534 | // the valid data, and compute the offset of the first\r | |
535 | // BlockOp and length of the last BlockOp\r | |
536 | //\r | |
537 | BlockOp = Nbuf->BlockOp;\r | |
538 | Cur = 0;\r | |
539 | \r | |
540 | for (Index = 0; Index < Nbuf->BlockOpNum; Index++) {\r | |
541 | if (Offset < Cur + BlockOp[Index].Size) {\r | |
542 | break;\r | |
543 | }\r | |
544 | \r | |
545 | Cur += BlockOp[Index].Size;\r | |
546 | }\r | |
547 | \r | |
548 | //\r | |
549 | // First is the index of the first BlockOp, FirstSkip is\r | |
550 | // the offset of the first byte in the first BlockOp.\r | |
551 | //\r | |
552 | First = Index;\r | |
553 | FirstSkip = Offset - Cur;\r | |
554 | FirstLen = BlockOp[Index].Size - FirstSkip;\r | |
555 | \r | |
556 | //\r | |
557 | //redundant assignment to make compiler happy.\r | |
558 | //\r | |
559 | Last = 0;\r | |
560 | LastLen = 0;\r | |
561 | \r | |
562 | if (Len > FirstLen) {\r | |
563 | Cur += BlockOp[Index].Size;\r | |
564 | Index++;\r | |
565 | \r | |
566 | for (; Index < Nbuf->BlockOpNum; Index++) {\r | |
567 | if (Offset + Len <= Cur + BlockOp[Index].Size) {\r | |
568 | Last = Index;\r | |
569 | LastLen = Offset + Len - Cur;\r | |
570 | break;\r | |
571 | }\r | |
572 | \r | |
573 | Cur += BlockOp[Index].Size;\r | |
574 | }\r | |
575 | \r | |
576 | } else {\r | |
577 | Last = First;\r | |
578 | LastLen = Len;\r | |
579 | FirstLen = Len;\r | |
580 | }\r | |
581 | \r | |
582 | BlockOpNum = Last - First + 1;\r | |
583 | CurBlockOp = 0;\r | |
584 | \r | |
585 | if (HeadSpace != 0) {\r | |
586 | //\r | |
587 | // Allocate an extra block to accomdate the head space.\r | |
588 | //\r | |
589 | BlockOpNum++;\r | |
590 | \r | |
591 | Child = NetbufAllocStruct (1, BlockOpNum);\r | |
592 | \r | |
593 | if (Child == NULL) {\r | |
594 | return NULL;\r | |
595 | }\r | |
596 | \r | |
e48e37fc | 597 | FirstBulk = AllocatePool (HeadSpace);\r |
cbf316f2 | 598 | \r |
599 | if (FirstBulk == NULL) {\r | |
600 | goto FreeChild;\r | |
601 | }\r | |
602 | \r | |
603 | Vector = Child->Vector;\r | |
604 | Vector->Free = NetbufGetFragmentFree;\r | |
605 | Vector->Arg = Nbuf->Vector;\r | |
606 | Vector->Flag = NET_VECTOR_OWN_FIRST;\r | |
607 | Vector->Len = HeadSpace;\r | |
608 | \r | |
609 | //\r | |
610 | //Reserve the head space in the first block\r | |
611 | //\r | |
612 | NetbufSetBlock (Child, FirstBulk, HeadSpace, 0);\r | |
613 | Child->BlockOp[0].Head += HeadSpace;\r | |
614 | Child->BlockOp[0].Size = 0;\r | |
615 | CurBlockOp++;\r | |
616 | \r | |
617 | }else {\r | |
618 | Child = NetbufAllocStruct (0, BlockOpNum);\r | |
619 | \r | |
620 | if (Child == NULL) {\r | |
621 | return NULL;\r | |
622 | }\r | |
623 | \r | |
624 | Child->Vector = Nbuf->Vector;\r | |
625 | }\r | |
626 | \r | |
627 | NET_GET_REF (Nbuf->Vector);\r | |
628 | Child->TotalSize = Len;\r | |
629 | \r | |
630 | //\r | |
631 | // Set all the BlockOp up, the first and last one are special\r | |
632 | // and need special process.\r | |
633 | //\r | |
634 | NetbufSetBlockOp (\r | |
635 | Child,\r | |
636 | Nbuf->BlockOp[First].Head + FirstSkip,\r | |
637 | FirstLen,\r | |
638 | CurBlockOp++\r | |
639 | );\r | |
640 | \r | |
8d285ec0 | 641 | for (Index = First + 1; Index <= Last - 1 ; Index++) {\r |
cbf316f2 | 642 | NetbufSetBlockOp (\r |
643 | Child,\r | |
644 | BlockOp[Index].Head,\r | |
645 | BlockOp[Index].Size,\r | |
646 | CurBlockOp++\r | |
647 | );\r | |
648 | }\r | |
649 | \r | |
650 | if (First != Last) {\r | |
651 | NetbufSetBlockOp (\r | |
652 | Child,\r | |
653 | BlockOp[Last].Head,\r | |
654 | LastLen,\r | |
655 | CurBlockOp\r | |
656 | );\r | |
657 | }\r | |
658 | \r | |
e48e37fc | 659 | CopyMem (Child->ProtoData, Nbuf->ProtoData, NET_PROTO_DATA);\r |
cbf316f2 | 660 | return Child;\r |
661 | \r | |
662 | FreeChild:\r | |
663 | \r | |
e48e37fc | 664 | gBS->FreePool (Child);\r |
cbf316f2 | 665 | return NULL;\r |
666 | }\r | |
667 | \r | |
668 | \r | |
669 | \r | |
670 | /**\r | |
671 | Build a NET_BUF from external blocks.\r | |
672 | \r | |
3e7104c2 | 673 | @param[in] ExtFragment Pointer to the data block.\r |
674 | @param[in] ExtNum The number of the data block.\r | |
675 | @param[in] HeadSpace The head space to be reserved.\r | |
676 | @param[in] HeadLen The length of the protocol header, This function\r | |
677 | will pull that number of data into a linear block.\r | |
678 | @param[in] ExtFree Pointer to the caller provided free function.\r | |
679 | @param[in] Arg The argument passed to ExtFree when ExtFree is\r | |
680 | called.\r | |
cbf316f2 | 681 | \r |
3e7104c2 | 682 | @return Pointer to the net buffer built from the data blocks.\r |
683 | If NULL, the allocation failed due to resource limit.\r | |
cbf316f2 | 684 | \r |
685 | **/\r | |
686 | NET_BUF *\r | |
7b414b4e | 687 | EFIAPI\r |
cbf316f2 | 688 | NetbufFromExt (\r |
689 | IN NET_FRAGMENT *ExtFragment,\r | |
690 | IN UINT32 ExtNum,\r | |
691 | IN UINT32 HeadSpace,\r | |
692 | IN UINT32 HeadLen,\r | |
693 | IN NET_VECTOR_EXT_FREE ExtFree,\r | |
694 | IN VOID *Arg OPTIONAL\r | |
695 | )\r | |
696 | {\r | |
697 | NET_BUF *Nbuf;\r | |
698 | NET_VECTOR *Vector;\r | |
699 | NET_FRAGMENT SavedFragment;\r | |
700 | UINT32 SavedIndex;\r | |
701 | UINT32 TotalLen;\r | |
702 | UINT32 BlockNum;\r | |
703 | UINT8 *FirstBlock;\r | |
704 | UINT32 FirstBlockLen;\r | |
705 | UINT8 *Header;\r | |
706 | UINT32 CurBlock;\r | |
707 | UINT32 Index;\r | |
708 | UINT32 Len;\r | |
709 | UINT32 Copied;\r | |
710 | \r | |
711 | ASSERT ((ExtFragment != NULL) && (ExtNum > 0) && (ExtFree != NULL));\r | |
712 | \r | |
713 | SavedFragment.Bulk = NULL;\r | |
714 | SavedFragment.Len = 0;\r | |
715 | \r | |
716 | FirstBlockLen = 0;\r | |
717 | FirstBlock = NULL;\r | |
718 | BlockNum = ExtNum;\r | |
719 | Index = 0;\r | |
720 | TotalLen = 0;\r | |
721 | SavedIndex = 0;\r | |
722 | Len = 0;\r | |
723 | Copied = 0;\r | |
724 | \r | |
725 | //\r | |
726 | // No need to consolidate the header if the first block is\r | |
727 | // longer than the header length or there is only one block.\r | |
728 | //\r | |
729 | if ((ExtFragment[0].Len >= HeadLen) || (ExtNum == 1)) {\r | |
730 | HeadLen = 0;\r | |
731 | }\r | |
732 | \r | |
733 | //\r | |
734 | // Allocate an extra block if we need to:\r | |
735 | // 1. Allocate some header space\r | |
736 | // 2. aggreate the packet header\r | |
737 | //\r | |
738 | if ((HeadSpace != 0) || (HeadLen != 0)) {\r | |
739 | FirstBlockLen = HeadLen + HeadSpace;\r | |
e48e37fc | 740 | FirstBlock = AllocatePool (FirstBlockLen);\r |
cbf316f2 | 741 | \r |
742 | if (FirstBlock == NULL) {\r | |
743 | return NULL;\r | |
744 | }\r | |
745 | \r | |
746 | BlockNum++;\r | |
747 | }\r | |
748 | \r | |
749 | //\r | |
750 | // Copy the header to the first block, reduce the NET_BLOCK\r | |
751 | // to allocate by one for each block that is completely covered\r | |
752 | // by the first bulk.\r | |
753 | //\r | |
754 | if (HeadLen != 0) {\r | |
755 | Len = HeadLen;\r | |
756 | Header = FirstBlock + HeadSpace;\r | |
757 | \r | |
758 | for (Index = 0; Index < ExtNum; Index++) {\r | |
759 | if (Len >= ExtFragment[Index].Len) {\r | |
e48e37fc | 760 | CopyMem (Header, ExtFragment[Index].Bulk, ExtFragment[Index].Len);\r |
cbf316f2 | 761 | \r |
762 | Copied += ExtFragment[Index].Len;\r | |
763 | Len -= ExtFragment[Index].Len;\r | |
764 | Header += ExtFragment[Index].Len;\r | |
765 | TotalLen += ExtFragment[Index].Len;\r | |
766 | BlockNum--;\r | |
767 | \r | |
768 | if (Len == 0) {\r | |
769 | //\r | |
770 | // Increament the index number to point to the next\r | |
771 | // non-empty fragment.\r | |
772 | //\r | |
773 | Index++;\r | |
774 | break;\r | |
775 | }\r | |
776 | \r | |
777 | } else {\r | |
e48e37fc | 778 | CopyMem (Header, ExtFragment[Index].Bulk, Len);\r |
cbf316f2 | 779 | \r |
780 | Copied += Len;\r | |
781 | TotalLen += Len;\r | |
782 | \r | |
783 | //\r | |
784 | // Adjust the block structure to exclude the data copied,\r | |
785 | // So, the left-over block can be processed as other blocks.\r | |
786 | // But it must be recovered later. (SavedIndex > 0) always\r | |
787 | // holds since we don't aggreate the header if the first block\r | |
788 | // is bigger enough that the header is continuous\r | |
789 | //\r | |
790 | SavedIndex = Index;\r | |
791 | SavedFragment = ExtFragment[Index];\r | |
792 | ExtFragment[Index].Bulk += Len;\r | |
793 | ExtFragment[Index].Len -= Len;\r | |
794 | break;\r | |
795 | }\r | |
796 | }\r | |
797 | }\r | |
798 | \r | |
799 | Nbuf = NetbufAllocStruct (BlockNum, BlockNum);\r | |
800 | \r | |
801 | if (Nbuf == NULL) {\r | |
802 | goto FreeFirstBlock;\r | |
803 | }\r | |
804 | \r | |
805 | Vector = Nbuf->Vector;\r | |
806 | Vector->Free = ExtFree;\r | |
807 | Vector->Arg = Arg;\r | |
3e7104c2 | 808 | Vector->Flag = ((FirstBlockLen != 0) ? NET_VECTOR_OWN_FIRST : 0);\r |
cbf316f2 | 809 | \r |
810 | //\r | |
811 | // Set the first block up which may contain\r | |
812 | // some head space and aggregated header\r | |
813 | //\r | |
814 | CurBlock = 0;\r | |
815 | \r | |
816 | if (FirstBlockLen != 0) {\r | |
817 | NetbufSetBlock (Nbuf, FirstBlock, HeadSpace + Copied, 0);\r | |
818 | Nbuf->BlockOp[0].Head += HeadSpace;\r | |
819 | Nbuf->BlockOp[0].Size = Copied;\r | |
820 | \r | |
821 | CurBlock++;\r | |
822 | }\r | |
823 | \r | |
824 | for (; Index < ExtNum; Index++) {\r | |
825 | NetbufSetBlock (Nbuf, ExtFragment[Index].Bulk, ExtFragment[Index].Len, CurBlock);\r | |
826 | TotalLen += ExtFragment[Index].Len;\r | |
827 | CurBlock++;\r | |
828 | }\r | |
829 | \r | |
830 | Vector->Len = TotalLen + HeadSpace;\r | |
831 | Nbuf->TotalSize = TotalLen;\r | |
832 | \r | |
3e7104c2 | 833 | if (SavedIndex != 0) {\r |
cbf316f2 | 834 | ExtFragment[SavedIndex] = SavedFragment;\r |
835 | }\r | |
836 | \r | |
837 | return Nbuf;\r | |
838 | \r | |
839 | FreeFirstBlock:\r | |
e48e37fc | 840 | gBS->FreePool (FirstBlock);\r |
cbf316f2 | 841 | return NULL;\r |
842 | }\r | |
843 | \r | |
844 | \r | |
845 | /**\r | |
846 | Build a fragment table to contain the fragments in the\r | |
847 | buffer. This is the opposite of the NetbufFromExt.\r | |
848 | \r | |
3e7104c2 | 849 | @param[in] Nbuf Point to the net buffer.\r |
850 | @param[in, out] ExtFragment Pointer to the data block.\r | |
851 | @param[in, out] ExtNum The number of the data block.\r | |
cbf316f2 | 852 | \r |
3e7104c2 | 853 | @retval EFI_BUFFER_TOO_SMALL The number of non-empty block is bigger than ExtNum.\r |
cbf316f2 | 854 | @retval EFI_SUCCESS Fragment table built.\r |
855 | \r | |
856 | **/\r | |
857 | EFI_STATUS\r | |
7b414b4e | 858 | EFIAPI\r |
cbf316f2 | 859 | NetbufBuildExt (\r |
860 | IN NET_BUF *Nbuf,\r | |
3e7104c2 | 861 | IN OUT NET_FRAGMENT *ExtFragment,\r |
862 | IN OUT UINT32 *ExtNum\r | |
cbf316f2 | 863 | )\r |
864 | {\r | |
865 | UINT32 Index;\r | |
866 | UINT32 Current;\r | |
867 | \r | |
868 | Current = 0;\r | |
869 | \r | |
870 | for (Index = 0; (Index < Nbuf->BlockOpNum); Index++) {\r | |
871 | if (Nbuf->BlockOp[Index].Size == 0) {\r | |
872 | continue;\r | |
873 | }\r | |
874 | \r | |
875 | if (Current < *ExtNum) {\r | |
876 | ExtFragment[Current].Bulk = Nbuf->BlockOp[Index].Head;\r | |
877 | ExtFragment[Current].Len = Nbuf->BlockOp[Index].Size;\r | |
878 | Current++;\r | |
879 | } else {\r | |
880 | return EFI_BUFFER_TOO_SMALL;\r | |
881 | }\r | |
882 | }\r | |
883 | \r | |
884 | *ExtNum = Current;\r | |
885 | return EFI_SUCCESS;\r | |
886 | }\r | |
887 | \r | |
888 | \r | |
889 | /**\r | |
890 | Build a NET_BUF from a list of NET_BUF.\r | |
891 | \r | |
3e7104c2 | 892 | @param[in] BufList A List of NET_BUF.\r |
893 | @param[in] HeadSpace The head space to be reserved.\r | |
894 | @param[in] HeaderLen The length of the protocol header, This function\r | |
895 | will pull that number of data into a linear block.\r | |
896 | @param[in] ExtFree Pointer to the caller provided free function.\r | |
897 | @param[in] Arg The argument passed to ExtFree when ExtFree is\r | |
898 | called.\r | |
cbf316f2 | 899 | \r |
3e7104c2 | 900 | @return Pointer to the net buffer built from the data\r |
cbf316f2 | 901 | blocks.\r |
902 | \r | |
903 | **/\r | |
904 | NET_BUF *\r | |
7b414b4e | 905 | EFIAPI\r |
cbf316f2 | 906 | NetbufFromBufList (\r |
e48e37fc | 907 | IN LIST_ENTRY *BufList,\r |
cbf316f2 | 908 | IN UINT32 HeadSpace,\r |
909 | IN UINT32 HeaderLen,\r | |
910 | IN NET_VECTOR_EXT_FREE ExtFree,\r | |
911 | IN VOID *Arg OPTIONAL\r | |
912 | )\r | |
913 | {\r | |
914 | NET_FRAGMENT *Fragment;\r | |
915 | UINT32 FragmentNum;\r | |
e48e37fc | 916 | LIST_ENTRY *Entry;\r |
cbf316f2 | 917 | NET_BUF *Nbuf;\r |
918 | UINT32 Index;\r | |
919 | UINT32 Current;\r | |
920 | \r | |
921 | //\r | |
922 | //Compute how many blocks are there\r | |
923 | //\r | |
924 | FragmentNum = 0;\r | |
925 | \r | |
926 | NET_LIST_FOR_EACH (Entry, BufList) {\r | |
927 | Nbuf = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r | |
928 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
929 | FragmentNum += Nbuf->BlockOpNum;\r | |
930 | }\r | |
931 | \r | |
932 | //\r | |
933 | //Allocate and copy block points\r | |
934 | //\r | |
e48e37fc | 935 | Fragment = AllocatePool (sizeof (NET_FRAGMENT) * FragmentNum);\r |
cbf316f2 | 936 | \r |
937 | if (Fragment == NULL) {\r | |
938 | return NULL;\r | |
939 | }\r | |
940 | \r | |
941 | Current = 0;\r | |
942 | \r | |
943 | NET_LIST_FOR_EACH (Entry, BufList) {\r | |
944 | Nbuf = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r | |
945 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
946 | \r | |
947 | for (Index = 0; Index < Nbuf->BlockOpNum; Index++) {\r | |
948 | if (Nbuf->BlockOp[Index].Size) {\r | |
949 | Fragment[Current].Bulk = Nbuf->BlockOp[Index].Head;\r | |
950 | Fragment[Current].Len = Nbuf->BlockOp[Index].Size;\r | |
951 | Current++;\r | |
952 | }\r | |
953 | }\r | |
954 | }\r | |
955 | \r | |
956 | Nbuf = NetbufFromExt (Fragment, Current, HeadSpace, HeaderLen, ExtFree, Arg);\r | |
e48e37fc | 957 | gBS->FreePool (Fragment);\r |
cbf316f2 | 958 | \r |
959 | return Nbuf;\r | |
960 | }\r | |
961 | \r | |
962 | \r | |
963 | /**\r | |
964 | Reserve some space in the header room of the buffer.\r | |
965 | Upon allocation, all the space are in the tail room\r | |
966 | of the buffer. Call this function to move some space\r | |
967 | to the header room. This function is quite limited in\r | |
968 | that it can only reserver space from the first block\r | |
969 | of an empty NET_BUF not built from the external. But\r | |
970 | it should be enough for the network stack.\r | |
971 | \r | |
3e7104c2 | 972 | @param[in, out] Nbuf Pointer to the net buffer.\r |
973 | @param[in] Len The length of buffer to be reserverd.\r | |
cbf316f2 | 974 | \r |
975 | **/\r | |
976 | VOID\r | |
7b414b4e | 977 | EFIAPI\r |
cbf316f2 | 978 | NetbufReserve (\r |
3e7104c2 | 979 | IN OUT NET_BUF *Nbuf,\r |
cbf316f2 | 980 | IN UINT32 Len\r |
981 | )\r | |
982 | {\r | |
983 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
984 | NET_CHECK_SIGNATURE (Nbuf->Vector, NET_VECTOR_SIGNATURE);\r | |
985 | \r | |
986 | ASSERT ((Nbuf->BlockOpNum == 1) && (Nbuf->TotalSize == 0));\r | |
987 | ASSERT ((Nbuf->Vector->Free == NULL) && (Nbuf->Vector->Len >= Len));\r | |
988 | \r | |
989 | Nbuf->BlockOp[0].Head += Len;\r | |
990 | Nbuf->BlockOp[0].Tail += Len;\r | |
991 | \r | |
992 | ASSERT (Nbuf->BlockOp[0].Tail <= Nbuf->BlockOp[0].BlockTail);\r | |
993 | }\r | |
994 | \r | |
995 | \r | |
996 | /**\r | |
997 | Allocate some space from the header or tail of the buffer.\r | |
998 | \r | |
3e7104c2 | 999 | @param[in, out] Nbuf Pointer to the net buffer.\r |
1000 | @param[in] Len The length of the buffer to be allocated.\r | |
1001 | @param [in] FromHead The flag to indicate whether reserve the data from\r | |
1002 | head or tail. TRUE for from head, and FALSE for\r | |
1003 | from tail.\r | |
cbf316f2 | 1004 | \r |
3e7104c2 | 1005 | @return Pointer to the first byte of the allocated buffer.\r |
cbf316f2 | 1006 | \r |
1007 | **/\r | |
1008 | UINT8 *\r | |
7b414b4e | 1009 | EFIAPI\r |
cbf316f2 | 1010 | NetbufAllocSpace (\r |
3e7104c2 | 1011 | IN OUT NET_BUF *Nbuf,\r |
cbf316f2 | 1012 | IN UINT32 Len,\r |
1013 | IN BOOLEAN FromHead\r | |
1014 | )\r | |
1015 | {\r | |
1016 | NET_BLOCK_OP *BlockOp;\r | |
1017 | UINT32 Index;\r | |
1018 | UINT8 *SavedTail;\r | |
1019 | \r | |
1020 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
1021 | NET_CHECK_SIGNATURE (Nbuf->Vector, NET_VECTOR_SIGNATURE);\r | |
1022 | \r | |
1023 | ASSERT (Len > 0);\r | |
1024 | \r | |
1025 | if (FromHead) {\r | |
1026 | //\r | |
1027 | // Allocate some space from head. If the buffer is empty,\r | |
1028 | // allocate from the first block. If it isn't, allocate\r | |
1029 | // from the first non-empty block, or the block before that.\r | |
1030 | //\r | |
1031 | if (Nbuf->TotalSize == 0) {\r | |
1032 | Index = 0;\r | |
1033 | } else {\r | |
1034 | NetbufGetByte (Nbuf, 0, &Index);\r | |
1035 | \r | |
1036 | if ((NET_HEADSPACE(&(Nbuf->BlockOp[Index])) < Len) && (Index > 0)) {\r | |
1037 | Index--;\r | |
1038 | }\r | |
1039 | }\r | |
1040 | \r | |
1041 | BlockOp = &(Nbuf->BlockOp[Index]);\r | |
1042 | \r | |
1043 | if (NET_HEADSPACE (BlockOp) < Len) {\r | |
1044 | return NULL;\r | |
1045 | }\r | |
1046 | \r | |
1047 | BlockOp->Head -= Len;\r | |
1048 | BlockOp->Size += Len;\r | |
1049 | Nbuf->TotalSize += Len;\r | |
1050 | \r | |
1051 | return BlockOp->Head;\r | |
1052 | \r | |
1053 | } else {\r | |
1054 | //\r | |
1055 | // Allocate some space from the tail. If the buffer is empty,\r | |
1056 | // allocate from the first block. If it isn't, allocate\r | |
1057 | // from the last non-empty block, or the block after that.\r | |
1058 | //\r | |
1059 | if (Nbuf->TotalSize == 0) {\r | |
1060 | Index = 0;\r | |
1061 | } else {\r | |
1062 | NetbufGetByte (Nbuf, Nbuf->TotalSize - 1, &Index);\r | |
1063 | \r | |
1064 | if ((NET_TAILSPACE(&(Nbuf->BlockOp[Index])) < Len) &&\r | |
1065 | (Index < Nbuf->BlockOpNum - 1)) {\r | |
1066 | \r | |
1067 | Index++;\r | |
1068 | }\r | |
1069 | }\r | |
1070 | \r | |
1071 | BlockOp = &(Nbuf->BlockOp[Index]);\r | |
1072 | \r | |
1073 | if (NET_TAILSPACE (BlockOp) < Len) {\r | |
1074 | return NULL;\r | |
1075 | }\r | |
1076 | \r | |
1077 | SavedTail = BlockOp->Tail;\r | |
1078 | \r | |
1079 | BlockOp->Tail += Len;\r | |
1080 | BlockOp->Size += Len;\r | |
1081 | Nbuf->TotalSize += Len;\r | |
1082 | \r | |
1083 | return SavedTail;\r | |
1084 | }\r | |
1085 | }\r | |
1086 | \r | |
1087 | \r | |
1088 | /**\r | |
1089 | Trim a single NET_BLOCK.\r | |
1090 | \r | |
3e7104c2 | 1091 | @param[in, out] BlockOp Pointer to the NET_BLOCK.\r |
1092 | @param[in] Len The length of the data to be trimmed.\r | |
1093 | @param[in] FromHead The flag to indicate whether trim data from head or\r | |
1094 | tail. TRUE for from head, and FALSE for from tail.\r | |
cbf316f2 | 1095 | \r |
1096 | **/\r | |
cbf316f2 | 1097 | VOID\r |
1098 | NetblockTrim (\r | |
3e7104c2 | 1099 | IN OUT NET_BLOCK_OP *BlockOp,\r |
cbf316f2 | 1100 | IN UINT32 Len,\r |
1101 | IN BOOLEAN FromHead\r | |
1102 | )\r | |
1103 | {\r | |
1104 | ASSERT (BlockOp && (BlockOp->Size >= Len));\r | |
1105 | \r | |
1106 | BlockOp->Size -= Len;\r | |
1107 | \r | |
1108 | if (FromHead) {\r | |
1109 | BlockOp->Head += Len;\r | |
1110 | } else {\r | |
1111 | BlockOp->Tail -= Len;\r | |
1112 | }\r | |
1113 | }\r | |
1114 | \r | |
1115 | \r | |
1116 | /**\r | |
1117 | Trim some data from the header or tail of the buffer.\r | |
1118 | \r | |
3e7104c2 | 1119 | @param[in, out] Nbuf Pointer to the net buffer.\r |
1120 | @param[in] Len The length of the data to be trimmed.\r | |
1121 | @param[in] FromHead The flag to indicate whether trim data from head or\r | |
1122 | tail. TRUE for from head, and FALSE for from tail.\r | |
cbf316f2 | 1123 | \r |
3e7104c2 | 1124 | @return Length of the actually trimmed data.\r |
cbf316f2 | 1125 | \r |
1126 | **/\r | |
1127 | UINT32\r | |
7b414b4e | 1128 | EFIAPI\r |
cbf316f2 | 1129 | NetbufTrim (\r |
3e7104c2 | 1130 | IN OUT NET_BUF *Nbuf,\r |
cbf316f2 | 1131 | IN UINT32 Len,\r |
1132 | IN BOOLEAN FromHead\r | |
1133 | )\r | |
1134 | {\r | |
1135 | NET_BLOCK_OP *BlockOp;\r | |
1136 | UINT32 Index;\r | |
1137 | UINT32 Trimmed;\r | |
1138 | \r | |
1139 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
1140 | \r | |
1141 | if (Len > Nbuf->TotalSize) {\r | |
1142 | Len = Nbuf->TotalSize;\r | |
1143 | }\r | |
1144 | \r | |
1145 | //\r | |
1146 | // If FromTail is true, iterate backward. That\r | |
1147 | // is, init Index to NBuf->BlockNum - 1, and\r | |
1148 | // decrease it by 1 during each loop. Otherwise,\r | |
1149 | // iterate forward. That is, init Index to 0, and\r | |
1150 | // increase it by 1 during each loop.\r | |
1151 | //\r | |
1152 | Trimmed = 0;\r | |
1153 | Nbuf->TotalSize -= Len;\r | |
1154 | \r | |
1155 | Index = (FromHead ? 0 : Nbuf->BlockOpNum - 1);\r | |
1156 | BlockOp = Nbuf->BlockOp;\r | |
1157 | \r | |
1158 | for (;;) {\r | |
1159 | if (BlockOp[Index].Size == 0) {\r | |
1160 | Index += (FromHead ? 1 : -1);\r | |
1161 | continue;\r | |
1162 | }\r | |
1163 | \r | |
1164 | if (Len > BlockOp[Index].Size) {\r | |
1165 | Len -= BlockOp[Index].Size;\r | |
1166 | Trimmed += BlockOp[Index].Size;\r | |
1167 | NetblockTrim (&BlockOp[Index], BlockOp[Index].Size, FromHead);\r | |
1168 | } else {\r | |
1169 | Trimmed += Len;\r | |
1170 | NetblockTrim (&BlockOp[Index], Len, FromHead);\r | |
1171 | break;\r | |
1172 | }\r | |
1173 | \r | |
1174 | Index += (FromHead ? 1 : -1);\r | |
1175 | }\r | |
1176 | \r | |
1177 | return Trimmed;\r | |
1178 | }\r | |
1179 | \r | |
1180 | \r | |
1181 | /**\r | |
1182 | Copy the data from the specific offset to the destination.\r | |
1183 | \r | |
3e7104c2 | 1184 | @param[in] Nbuf Pointer to the net buffer.\r |
1185 | @param[in] Offset The sequence number of the first byte to copy.\r | |
1186 | @param[in] Len Length of the data to copy.\r | |
1187 | @param[in] Dest The destination of the data to copy to.\r | |
cbf316f2 | 1188 | \r |
1189 | @retval UINTN The length of the copied data.\r | |
1190 | \r | |
1191 | **/\r | |
1192 | UINT32\r | |
7b414b4e | 1193 | EFIAPI\r |
cbf316f2 | 1194 | NetbufCopy (\r |
1195 | IN NET_BUF *Nbuf,\r | |
1196 | IN UINT32 Offset,\r | |
1197 | IN UINT32 Len,\r | |
1198 | IN UINT8 *Dest\r | |
1199 | )\r | |
1200 | {\r | |
1201 | NET_BLOCK_OP *BlockOp;\r | |
1202 | UINT32 Skip;\r | |
1203 | UINT32 Left;\r | |
1204 | UINT32 Copied;\r | |
1205 | UINT32 Index;\r | |
1206 | UINT32 Cur;\r | |
1207 | \r | |
1208 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
1209 | ASSERT (Dest);\r | |
1210 | \r | |
1211 | if ((Len == 0) || (Nbuf->TotalSize <= Offset)) {\r | |
1212 | return 0;\r | |
1213 | }\r | |
1214 | \r | |
1215 | if (Nbuf->TotalSize - Offset < Len) {\r | |
1216 | Len = Nbuf->TotalSize - Offset;\r | |
1217 | }\r | |
1218 | \r | |
1219 | BlockOp = Nbuf->BlockOp;\r | |
1220 | \r | |
1221 | //\r | |
1222 | // Skip to the offset. Don't make "Offset-By-One" error here.\r | |
1223 | // Cur + BLOCK.SIZE is the first sequence number of next block.\r | |
1224 | // So, (Offset < Cur + BLOCK.SIZE) means that the first byte\r | |
1225 | // is in the current block. if (Offset == Cur + BLOCK.SIZE), the\r | |
1226 | // first byte is the next block's first byte.\r | |
1227 | //\r | |
1228 | Cur = 0;\r | |
1229 | \r | |
1230 | for (Index = 0; Index < Nbuf->BlockOpNum; Index++) {\r | |
1231 | if (BlockOp[Index].Size == 0) {\r | |
1232 | continue;\r | |
1233 | }\r | |
1234 | \r | |
1235 | if (Offset < Cur + BlockOp[Index].Size) {\r | |
1236 | break;\r | |
1237 | }\r | |
1238 | \r | |
1239 | Cur += BlockOp[Index].Size;\r | |
1240 | }\r | |
1241 | \r | |
1242 | //\r | |
1243 | // Cur is the sequence number of the first byte in the block\r | |
1244 | // Offset - Cur is the number of bytes before first byte to\r | |
1245 | // to copy in the current block.\r | |
1246 | //\r | |
1247 | Skip = Offset - Cur;\r | |
1248 | Left = BlockOp[Index].Size - Skip;\r | |
1249 | \r | |
1250 | if (Len <= Left) {\r | |
e48e37fc | 1251 | CopyMem (Dest, BlockOp[Index].Head + Skip, Len);\r |
cbf316f2 | 1252 | return Len;\r |
1253 | }\r | |
1254 | \r | |
e48e37fc | 1255 | CopyMem (Dest, BlockOp[Index].Head + Skip, Left);\r |
cbf316f2 | 1256 | \r |
1257 | Dest += Left;\r | |
1258 | Len -= Left;\r | |
1259 | Copied = Left;\r | |
1260 | \r | |
1261 | Index++;\r | |
1262 | \r | |
1263 | for (; Index < Nbuf->BlockOpNum; Index++) {\r | |
1264 | if (Len > BlockOp[Index].Size) {\r | |
1265 | Len -= BlockOp[Index].Size;\r | |
1266 | Copied += BlockOp[Index].Size;\r | |
1267 | \r | |
e48e37fc | 1268 | CopyMem (Dest, BlockOp[Index].Head, BlockOp[Index].Size);\r |
cbf316f2 | 1269 | Dest += BlockOp[Index].Size;\r |
1270 | } else {\r | |
1271 | Copied += Len;\r | |
e48e37fc | 1272 | CopyMem (Dest, BlockOp[Index].Head, Len);\r |
cbf316f2 | 1273 | break;\r |
1274 | }\r | |
1275 | }\r | |
1276 | \r | |
1277 | return Copied;\r | |
1278 | }\r | |
1279 | \r | |
1280 | \r | |
1281 | /**\r | |
1282 | Initiate the net buffer queue.\r | |
1283 | \r | |
3e7104c2 | 1284 | @param[in, out] NbufQue Pointer to the net buffer queue to be initiated.\r |
cbf316f2 | 1285 | \r |
1286 | **/\r | |
1287 | VOID\r | |
7b414b4e | 1288 | EFIAPI\r |
cbf316f2 | 1289 | NetbufQueInit (\r |
3e7104c2 | 1290 | IN OUT NET_BUF_QUEUE *NbufQue\r |
cbf316f2 | 1291 | )\r |
1292 | {\r | |
1293 | NbufQue->Signature = NET_QUE_SIGNATURE;\r | |
1294 | NbufQue->RefCnt = 1;\r | |
e48e37fc | 1295 | InitializeListHead (&NbufQue->List);\r |
cbf316f2 | 1296 | \r |
e48e37fc | 1297 | InitializeListHead (&NbufQue->BufList);\r |
cbf316f2 | 1298 | NbufQue->BufSize = 0;\r |
1299 | NbufQue->BufNum = 0;\r | |
1300 | }\r | |
1301 | \r | |
1302 | \r | |
1303 | /**\r | |
1304 | Allocate an initialized net buffer queue.\r | |
1305 | \r | |
3e7104c2 | 1306 | @return Pointer to the allocated net buffer queue.If NULL, the\r |
1307 | allocation failed due to resource limit.\r | |
cbf316f2 | 1308 | \r |
1309 | **/\r | |
1310 | NET_BUF_QUEUE *\r | |
7b414b4e | 1311 | EFIAPI\r |
cbf316f2 | 1312 | NetbufQueAlloc (\r |
1313 | VOID\r | |
1314 | )\r | |
1315 | {\r | |
1316 | NET_BUF_QUEUE *NbufQue;\r | |
1317 | \r | |
e48e37fc | 1318 | NbufQue = AllocatePool (sizeof (NET_BUF_QUEUE));\r |
cbf316f2 | 1319 | if (NbufQue == NULL) {\r |
1320 | return NULL;\r | |
1321 | }\r | |
1322 | \r | |
1323 | NetbufQueInit (NbufQue);\r | |
1324 | \r | |
1325 | return NbufQue;\r | |
1326 | }\r | |
1327 | \r | |
1328 | \r | |
1329 | /**\r | |
1330 | Free a net buffer queue.\r | |
1331 | \r | |
3e7104c2 | 1332 | @param[in] NbufQue Poitner to the net buffer queue to be freed.\r |
cbf316f2 | 1333 | \r |
1334 | **/\r | |
1335 | VOID\r | |
7b414b4e | 1336 | EFIAPI\r |
cbf316f2 | 1337 | NetbufQueFree (\r |
1338 | IN NET_BUF_QUEUE *NbufQue\r | |
1339 | )\r | |
1340 | {\r | |
1341 | NET_CHECK_SIGNATURE (NbufQue, NET_QUE_SIGNATURE);\r | |
1342 | \r | |
1343 | NbufQue->RefCnt--;\r | |
1344 | \r | |
1345 | if (NbufQue->RefCnt == 0) {\r | |
1346 | NetbufQueFlush (NbufQue);\r | |
e48e37fc | 1347 | gBS->FreePool (NbufQue);\r |
cbf316f2 | 1348 | }\r |
1349 | }\r | |
1350 | \r | |
1351 | \r | |
1352 | /**\r | |
1353 | Append a buffer to the end of the queue.\r | |
1354 | \r | |
3e7104c2 | 1355 | @param[in, out] NbufQue Pointer to the net buffer queue.\r |
1356 | @param[in, out] Nbuf Pointer to the net buffer to be appended.\r | |
cbf316f2 | 1357 | \r |
1358 | **/\r | |
1359 | VOID\r | |
7b414b4e | 1360 | EFIAPI\r |
cbf316f2 | 1361 | NetbufQueAppend (\r |
3e7104c2 | 1362 | IN OUT NET_BUF_QUEUE *NbufQue,\r |
1363 | IN OUT NET_BUF *Nbuf\r | |
cbf316f2 | 1364 | )\r |
1365 | {\r | |
1366 | NET_CHECK_SIGNATURE (NbufQue, NET_QUE_SIGNATURE);\r | |
1367 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
1368 | \r | |
e48e37fc | 1369 | InsertTailList (&NbufQue->BufList, &Nbuf->List);\r |
cbf316f2 | 1370 | \r |
1371 | NbufQue->BufSize += Nbuf->TotalSize;\r | |
1372 | NbufQue->BufNum++;\r | |
1373 | }\r | |
1374 | \r | |
1375 | \r | |
1376 | /**\r | |
1377 | Remove a net buffer from head in the specific queue.\r | |
1378 | \r | |
3e7104c2 | 1379 | @param[in, out] NbufQue Pointer to the net buffer queue.\r |
cbf316f2 | 1380 | \r |
3e7104c2 | 1381 | @return Pointer to the net buffer removed from the specific\r |
1382 | queue. If NULL, there is no net buffer in the specific\r | |
cbf316f2 | 1383 | queue.\r |
1384 | \r | |
1385 | **/\r | |
1386 | NET_BUF *\r | |
7b414b4e | 1387 | EFIAPI\r |
cbf316f2 | 1388 | NetbufQueRemove (\r |
3e7104c2 | 1389 | IN OUT NET_BUF_QUEUE *NbufQue\r |
cbf316f2 | 1390 | )\r |
1391 | {\r | |
1392 | NET_BUF *First;\r | |
1393 | \r | |
1394 | NET_CHECK_SIGNATURE (NbufQue, NET_QUE_SIGNATURE);\r | |
1395 | \r | |
1396 | if (NbufQue->BufNum == 0) {\r | |
1397 | return NULL;\r | |
1398 | }\r | |
1399 | \r | |
1400 | First = NET_LIST_USER_STRUCT (NbufQue->BufList.ForwardLink, NET_BUF, List);\r | |
1401 | \r | |
1402 | NetListRemoveHead (&NbufQue->BufList);\r | |
1403 | \r | |
1404 | NbufQue->BufSize -= First->TotalSize;\r | |
1405 | NbufQue->BufNum--;\r | |
1406 | return First;\r | |
1407 | }\r | |
1408 | \r | |
1409 | \r | |
1410 | /**\r | |
1411 | Copy some data from the buffer queue to the destination.\r | |
1412 | \r | |
3e7104c2 | 1413 | @param[in] NbufQue Pointer to the net buffer queue.\r |
1414 | @param[in] Offset The sequence number of the first byte to copy.\r | |
1415 | @param[in] Len Length of the data to copy.\r | |
1416 | @param[out] Dest The destination of the data to copy to.\r | |
cbf316f2 | 1417 | \r |
3e7104c2 | 1418 | @return The length of the copied data. If 0, then the length is zero or offset \r |
1419 | suppress the total size of net buffer.\r | |
cbf316f2 | 1420 | \r |
1421 | **/\r | |
1422 | UINT32\r | |
3e7104c2 | 1423 | EFIAPI\r |
cbf316f2 | 1424 | NetbufQueCopy (\r |
1425 | IN NET_BUF_QUEUE *NbufQue,\r | |
1426 | IN UINT32 Offset,\r | |
1427 | IN UINT32 Len,\r | |
3e7104c2 | 1428 | OUT UINT8 *Dest\r |
cbf316f2 | 1429 | )\r |
1430 | {\r | |
e48e37fc | 1431 | LIST_ENTRY *Entry;\r |
cbf316f2 | 1432 | NET_BUF *Nbuf;\r |
1433 | UINT32 Skip;\r | |
1434 | UINT32 Left;\r | |
1435 | UINT32 Cur;\r | |
1436 | UINT32 Copied;\r | |
1437 | \r | |
1438 | NET_CHECK_SIGNATURE (NbufQue, NET_QUE_SIGNATURE);\r | |
1439 | ASSERT (Dest != NULL);\r | |
1440 | \r | |
1441 | if ((Len == 0) || (NbufQue->BufSize <= Offset)) {\r | |
1442 | return 0;\r | |
1443 | }\r | |
1444 | \r | |
1445 | if (NbufQue->BufSize - Offset < Len) {\r | |
1446 | Len = NbufQue->BufSize - Offset;\r | |
1447 | }\r | |
1448 | \r | |
1449 | //\r | |
1450 | // skip to the Offset\r | |
1451 | //\r | |
1452 | Cur = 0;\r | |
1453 | Nbuf = NULL;\r | |
1454 | \r | |
1455 | NET_LIST_FOR_EACH (Entry, &NbufQue->BufList) {\r | |
1456 | Nbuf = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r | |
1457 | \r | |
1458 | if (Offset < Cur + Nbuf->TotalSize) {\r | |
1459 | break;\r | |
1460 | }\r | |
1461 | \r | |
1462 | Cur += Nbuf->TotalSize;\r | |
1463 | }\r | |
1464 | \r | |
1465 | //\r | |
1466 | // Copy the data in the first buffer.\r | |
1467 | //\r | |
1468 | Skip = Offset - Cur;\r | |
1469 | Left = Nbuf->TotalSize - Skip;\r | |
1470 | \r | |
1471 | if (Len < Left) {\r | |
1472 | return NetbufCopy (Nbuf, Skip, Len, Dest);\r | |
1473 | }\r | |
1474 | \r | |
1475 | NetbufCopy (Nbuf, Skip, Left, Dest);\r | |
1476 | Dest += Left;\r | |
1477 | Len -= Left;\r | |
1478 | Copied = Left;\r | |
1479 | \r | |
1480 | //\r | |
1481 | // Iterate over the others\r | |
1482 | //\r | |
1483 | Entry = Entry->ForwardLink;\r | |
1484 | \r | |
1485 | while ((Len > 0) && (Entry != &NbufQue->BufList)) {\r | |
1486 | Nbuf = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r | |
1487 | \r | |
1488 | if (Len > Nbuf->TotalSize) {\r | |
1489 | Len -= Nbuf->TotalSize;\r | |
1490 | Copied += Nbuf->TotalSize;\r | |
1491 | \r | |
1492 | NetbufCopy (Nbuf, 0, Nbuf->TotalSize, Dest);\r | |
1493 | Dest += Nbuf->TotalSize;\r | |
1494 | \r | |
1495 | } else {\r | |
1496 | NetbufCopy (Nbuf, 0, Len, Dest);\r | |
1497 | Copied += Len;\r | |
1498 | break;\r | |
1499 | }\r | |
1500 | \r | |
1501 | Entry = Entry->ForwardLink;\r | |
1502 | }\r | |
1503 | \r | |
1504 | return Copied;\r | |
1505 | }\r | |
1506 | \r | |
1507 | \r | |
1508 | /**\r | |
1509 | Trim some data from the queue header, release the buffer if\r | |
1510 | whole buffer is trimmed.\r | |
1511 | \r | |
3e7104c2 | 1512 | @param[in, out] NbufQue Pointer to the net buffer queue.\r |
1513 | @param[in] Len Length of the data to trim.\r | |
cbf316f2 | 1514 | \r |
3e7104c2 | 1515 | @return The length of the data trimmed, or 0 if length of the data to trim is zero.\r |
cbf316f2 | 1516 | \r |
1517 | **/\r | |
1518 | UINT32\r | |
7b414b4e | 1519 | EFIAPI\r |
cbf316f2 | 1520 | NetbufQueTrim (\r |
3e7104c2 | 1521 | IN OUT NET_BUF_QUEUE *NbufQue,\r |
cbf316f2 | 1522 | IN UINT32 Len\r |
1523 | )\r | |
1524 | {\r | |
e48e37fc | 1525 | LIST_ENTRY *Entry;\r |
1526 | LIST_ENTRY *Next;\r | |
cbf316f2 | 1527 | NET_BUF *Nbuf;\r |
1528 | UINT32 Trimmed;\r | |
1529 | \r | |
1530 | NET_CHECK_SIGNATURE (NbufQue, NET_QUE_SIGNATURE);\r | |
1531 | \r | |
1532 | if (Len == 0) {\r | |
1533 | return 0;\r | |
1534 | }\r | |
1535 | \r | |
1536 | if (Len > NbufQue->BufSize) {\r | |
1537 | Len = NbufQue->BufSize;\r | |
1538 | }\r | |
1539 | \r | |
1540 | NbufQue->BufSize -= Len;\r | |
1541 | Trimmed = 0;\r | |
1542 | \r | |
1543 | NET_LIST_FOR_EACH_SAFE (Entry, Next, &NbufQue->BufList) {\r | |
1544 | Nbuf = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);\r | |
1545 | \r | |
1546 | if (Len >= Nbuf->TotalSize) {\r | |
1547 | Trimmed += Nbuf->TotalSize;\r | |
1548 | Len -= Nbuf->TotalSize;\r | |
1549 | \r | |
e48e37fc | 1550 | RemoveEntryList (Entry);\r |
cbf316f2 | 1551 | NetbufFree (Nbuf);\r |
1552 | \r | |
1553 | NbufQue->BufNum--;\r | |
1554 | \r | |
1555 | if (Len == 0) {\r | |
1556 | break;\r | |
1557 | }\r | |
1558 | \r | |
1559 | } else {\r | |
1560 | Trimmed += NetbufTrim (Nbuf, Len, NET_BUF_HEAD);\r | |
1561 | break;\r | |
1562 | }\r | |
1563 | }\r | |
1564 | \r | |
1565 | return Trimmed;\r | |
1566 | }\r | |
1567 | \r | |
1568 | \r | |
1569 | /**\r | |
1570 | Flush the net buffer queue.\r | |
1571 | \r | |
3e7104c2 | 1572 | @param[in, out] NbufQue Pointer to the queue to be flushed.\r |
cbf316f2 | 1573 | \r |
1574 | **/\r | |
1575 | VOID\r | |
7b414b4e | 1576 | EFIAPI\r |
cbf316f2 | 1577 | NetbufQueFlush (\r |
3e7104c2 | 1578 | IN OUT NET_BUF_QUEUE *NbufQue\r |
cbf316f2 | 1579 | )\r |
1580 | {\r | |
1581 | NET_CHECK_SIGNATURE (NbufQue, NET_QUE_SIGNATURE);\r | |
1582 | \r | |
1583 | NetbufFreeList (&NbufQue->BufList);\r | |
1584 | \r | |
1585 | NbufQue->BufNum = 0;\r | |
1586 | NbufQue->BufSize = 0;\r | |
1587 | }\r | |
1588 | \r | |
1589 | \r | |
1590 | /**\r | |
1591 | Compute checksum for a bulk of data.\r | |
1592 | \r | |
3e7104c2 | 1593 | @param[in] Bulk Pointer to the data.\r |
1594 | @param[in] Len Length of the data, in bytes.\r | |
cbf316f2 | 1595 | \r |
3e7104c2 | 1596 | @return The computed checksum.\r |
cbf316f2 | 1597 | \r |
1598 | **/\r | |
1599 | UINT16\r | |
7b414b4e | 1600 | EFIAPI\r |
cbf316f2 | 1601 | NetblockChecksum (\r |
1602 | IN UINT8 *Bulk,\r | |
1603 | IN UINT32 Len\r | |
1604 | )\r | |
1605 | {\r | |
1606 | register UINT32 Sum;\r | |
1607 | \r | |
1608 | Sum = 0;\r | |
1609 | \r | |
1610 | while (Len > 1) {\r | |
1611 | Sum += *(UINT16 *) Bulk;\r | |
1612 | Bulk += 2;\r | |
1613 | Len -= 2;\r | |
1614 | }\r | |
1615 | \r | |
1616 | //\r | |
1617 | // Add left-over byte, if any\r | |
1618 | //\r | |
1619 | if (Len > 0) {\r | |
1620 | Sum += *(UINT8 *) Bulk;\r | |
1621 | }\r | |
1622 | \r | |
1623 | //\r | |
1624 | // Fold 32-bit sum to 16 bits\r | |
1625 | //\r | |
3e7104c2 | 1626 | while ((Sum >> 16) != 0) {\r |
cbf316f2 | 1627 | Sum = (Sum & 0xffff) + (Sum >> 16);\r |
1628 | \r | |
1629 | }\r | |
1630 | \r | |
1631 | return (UINT16) Sum;\r | |
1632 | }\r | |
1633 | \r | |
1634 | \r | |
1635 | /**\r | |
1636 | Add two checksums.\r | |
1637 | \r | |
3e7104c2 | 1638 | @param[in] Checksum1 The first checksum to be added.\r |
1639 | @param[in] Checksum2 The second checksum to be added.\r | |
cbf316f2 | 1640 | \r |
3e7104c2 | 1641 | @return The new checksum.\r |
cbf316f2 | 1642 | \r |
1643 | **/\r | |
1644 | UINT16\r | |
7b414b4e | 1645 | EFIAPI\r |
cbf316f2 | 1646 | NetAddChecksum (\r |
1647 | IN UINT16 Checksum1,\r | |
1648 | IN UINT16 Checksum2\r | |
1649 | )\r | |
1650 | {\r | |
1651 | UINT32 Sum;\r | |
1652 | \r | |
1653 | Sum = Checksum1 + Checksum2;\r | |
1654 | \r | |
1655 | //\r | |
1656 | // two UINT16 can only add up to a carry of 1.\r | |
1657 | //\r | |
3e7104c2 | 1658 | if ((Sum >> 16) != 0) {\r |
cbf316f2 | 1659 | Sum = (Sum & 0xffff) + 1;\r |
1660 | \r | |
1661 | }\r | |
1662 | \r | |
1663 | return (UINT16) Sum;\r | |
1664 | }\r | |
1665 | \r | |
1666 | \r | |
1667 | /**\r | |
1668 | Compute the checksum for a NET_BUF.\r | |
1669 | \r | |
3e7104c2 | 1670 | @param[in] Nbuf Pointer to the net buffer.\r |
cbf316f2 | 1671 | \r |
3e7104c2 | 1672 | @return The computed checksum.\r |
cbf316f2 | 1673 | \r |
1674 | **/\r | |
1675 | UINT16\r | |
7b414b4e | 1676 | EFIAPI\r |
cbf316f2 | 1677 | NetbufChecksum (\r |
1678 | IN NET_BUF *Nbuf\r | |
1679 | )\r | |
1680 | {\r | |
1681 | NET_BLOCK_OP *BlockOp;\r | |
1682 | UINT32 Offset;\r | |
1683 | UINT16 TotalSum;\r | |
1684 | UINT16 BlockSum;\r | |
1685 | UINT32 Index;\r | |
1686 | \r | |
1687 | NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);\r | |
1688 | \r | |
1689 | TotalSum = 0;\r | |
1690 | Offset = 0;\r | |
1691 | BlockOp = Nbuf->BlockOp;\r | |
1692 | \r | |
1693 | for (Index = 0; Index < Nbuf->BlockOpNum; Index++) {\r | |
1694 | if (BlockOp[Index].Size == 0) {\r | |
1695 | continue;\r | |
1696 | }\r | |
1697 | \r | |
1698 | BlockSum = NetblockChecksum (BlockOp[Index].Head, BlockOp[Index].Size);\r | |
1699 | \r | |
3e7104c2 | 1700 | if ((Offset & 0x01) != 0) {\r |
cbf316f2 | 1701 | //\r |
1702 | // The checksum starts with an odd byte, swap\r | |
1703 | // the checksum before added to total checksum\r | |
1704 | //\r | |
4eb65aff | 1705 | BlockSum = (UINT16) NET_SWAP_SHORT (BlockSum);\r |
cbf316f2 | 1706 | }\r |
1707 | \r | |
1708 | TotalSum = NetAddChecksum (BlockSum, TotalSum);\r | |
1709 | Offset += BlockOp[Index].Size;\r | |
1710 | }\r | |
1711 | \r | |
1712 | return TotalSum;\r | |
1713 | }\r | |
1714 | \r | |
1715 | \r | |
1716 | /**\r | |
1717 | Compute the checksum for TCP/UDP pseudo header.\r | |
1718 | Src, Dst are in network byte order. and Len is\r | |
1719 | in host byte order.\r | |
1720 | \r | |
3e7104c2 | 1721 | @param[in] Src The source address of the packet.\r |
1722 | @param[in] Dst The destination address of the packet.\r | |
1723 | @param[in] Proto The protocol type of the packet.\r | |
1724 | @param[in] Len The length of the packet.\r | |
cbf316f2 | 1725 | \r |
3e7104c2 | 1726 | @return The computed checksum.\r |
cbf316f2 | 1727 | \r |
1728 | **/\r | |
1729 | UINT16\r | |
7b414b4e | 1730 | EFIAPI\r |
cbf316f2 | 1731 | NetPseudoHeadChecksum (\r |
1732 | IN IP4_ADDR Src,\r | |
1733 | IN IP4_ADDR Dst,\r | |
1734 | IN UINT8 Proto,\r | |
1735 | IN UINT16 Len\r | |
1736 | )\r | |
1737 | {\r | |
1738 | NET_PSEUDO_HDR Hdr;\r | |
1739 | \r | |
1740 | //\r | |
1741 | // Zero the memory to relieve align problems\r | |
1742 | //\r | |
e48e37fc | 1743 | ZeroMem (&Hdr, sizeof (Hdr));\r |
cbf316f2 | 1744 | \r |
1745 | Hdr.SrcIp = Src;\r | |
1746 | Hdr.DstIp = Dst;\r | |
1747 | Hdr.Protocol = Proto;\r | |
1748 | Hdr.Len = HTONS (Len);\r | |
1749 | \r | |
1750 | return NetblockChecksum ((UINT8 *) &Hdr, sizeof (Hdr));\r | |
1751 | }\r |