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772db4bb | 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 | \r | |
13 | Module Name:\r | |
14 | \r | |
15 | Ip4Igmp.c\r | |
16 | \r | |
17 | Abstract:\r | |
18 | \r | |
19 | This file implements the RFC2236: IGMP v2\r | |
20 | \r | |
21 | \r | |
22 | **/\r | |
23 | \r | |
24 | #include "Ip4Impl.h"\r | |
25 | \r | |
26 | //\r | |
27 | // Route Alert option in IGMP report to direct routers to\r | |
28 | // examine the packet more closely.\r | |
29 | //\r | |
30 | UINT32 mRouteAlertOption = 0x00000494;\r | |
31 | \r | |
32 | \r | |
33 | /**\r | |
34 | Init the IGMP control data of the IP4 service instance, configure\r | |
35 | MNP to receive ALL SYSTEM multicast.\r | |
36 | \r | |
37 | @param IpSb The IP4 service whose IGMP is to be initialized.\r | |
38 | \r | |
5405e9a6 | 39 | @retval EFI_SUCCESS IGMP of the IpSb is successfully initialized.\r |
772db4bb | 40 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resource to initialize IGMP.\r |
41 | @retval Others Failed to initialize the IGMP of IpSb.\r | |
772db4bb | 42 | \r |
43 | **/\r | |
44 | EFI_STATUS\r | |
45 | Ip4InitIgmp (\r | |
5405e9a6 | 46 | IN OUT IP4_SERVICE *IpSb\r |
772db4bb | 47 | )\r |
48 | {\r | |
49 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
50 | EFI_MANAGED_NETWORK_PROTOCOL *Mnp;\r | |
51 | IGMP_GROUP *Group;\r | |
52 | EFI_STATUS Status;\r | |
53 | \r | |
54 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
55 | \r | |
56 | //\r | |
57 | // Configure MNP to receive ALL_SYSTEM multicast\r | |
58 | //\r | |
e48e37fc | 59 | Group = AllocatePool (sizeof (IGMP_GROUP));\r |
772db4bb | 60 | \r |
61 | if (Group == NULL) {\r | |
62 | return EFI_OUT_OF_RESOURCES;\r | |
63 | }\r | |
64 | \r | |
65 | Mnp = IpSb->Mnp;\r | |
66 | \r | |
67 | Group->Address = IP4_ALLSYSTEM_ADDRESS;\r | |
68 | Group->RefCnt = 1;\r | |
69 | Group->DelayTime = 0;\r | |
70 | Group->ReportByUs = FALSE;\r | |
71 | \r | |
72 | Status = Ip4GetMulticastMac (Mnp, IP4_ALLSYSTEM_ADDRESS, &Group->Mac);\r | |
73 | \r | |
74 | if (EFI_ERROR (Status)) {\r | |
75 | goto ON_ERROR;\r | |
76 | }\r | |
77 | \r | |
78 | Status = Mnp->Groups (Mnp, TRUE, &Group->Mac);\r | |
79 | \r | |
80 | if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {\r | |
81 | goto ON_ERROR;\r | |
82 | }\r | |
83 | \r | |
e48e37fc | 84 | InsertHeadList (&IgmpCtrl->Groups, &Group->Link);\r |
772db4bb | 85 | return EFI_SUCCESS;\r |
86 | \r | |
87 | ON_ERROR:\r | |
e48e37fc | 88 | gBS->FreePool (Group);\r |
772db4bb | 89 | return Status;\r |
90 | }\r | |
91 | \r | |
92 | \r | |
93 | /**\r | |
94 | Find the IGMP_GROUP structure which contains the status of multicast\r | |
95 | group Address in this IGMP control block\r | |
96 | \r | |
97 | @param IgmpCtrl The IGMP control block to search from\r | |
98 | @param Address The multicast address to search\r | |
99 | \r | |
100 | @return NULL if the multicast address isn't in the IGMP control block. Otherwise\r | |
5405e9a6 | 101 | the point to the IGMP_GROUP which contains the status of multicast group\r |
102 | for Address.\r | |
772db4bb | 103 | \r |
104 | **/\r | |
105 | IGMP_GROUP *\r | |
106 | Ip4FindGroup (\r | |
107 | IN IGMP_SERVICE_DATA *IgmpCtrl,\r | |
108 | IN IP4_ADDR Address\r | |
109 | )\r | |
110 | {\r | |
e48e37fc | 111 | LIST_ENTRY *Entry;\r |
772db4bb | 112 | IGMP_GROUP *Group;\r |
113 | \r | |
114 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
115 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
116 | \r | |
117 | if (Group->Address == Address) {\r | |
118 | return Group;\r | |
119 | }\r | |
120 | }\r | |
121 | \r | |
122 | return NULL;\r | |
123 | }\r | |
124 | \r | |
125 | \r | |
126 | /**\r | |
127 | Count the number of IP4 multicast groups that are mapped to the\r | |
128 | same MAC address. Several IP4 multicast address may be mapped to\r | |
129 | the same MAC address.\r | |
130 | \r | |
131 | @param IgmpCtrl The IGMP control block to search in\r | |
132 | @param Mac The MAC address to search\r | |
133 | \r | |
134 | @return The number of the IP4 multicast group that mapped to the same\r | |
5405e9a6 | 135 | multicast group Mac.\r |
772db4bb | 136 | \r |
137 | **/\r | |
138 | INTN\r | |
139 | Ip4FindMac (\r | |
140 | IN IGMP_SERVICE_DATA *IgmpCtrl,\r | |
141 | IN EFI_MAC_ADDRESS *Mac\r | |
142 | )\r | |
143 | {\r | |
e48e37fc | 144 | LIST_ENTRY *Entry;\r |
772db4bb | 145 | IGMP_GROUP *Group;\r |
146 | INTN Count;\r | |
147 | \r | |
148 | Count = 0;\r | |
149 | \r | |
150 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
151 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
152 | \r | |
153 | if (NET_MAC_EQUAL (&Group->Mac, Mac, sizeof (EFI_MAC_ADDRESS))) {\r | |
154 | Count++;\r | |
155 | }\r | |
156 | }\r | |
157 | \r | |
158 | return Count;\r | |
159 | }\r | |
160 | \r | |
161 | \r | |
162 | /**\r | |
163 | Send an IGMP protocol message to the Dst, such as IGMP v1 membership report.\r | |
164 | \r | |
165 | @param IpSb The IP4 service instance that requests the\r | |
166 | transmission\r | |
167 | @param Dst The destinaton to send to\r | |
5405e9a6 | 168 | @param Type The IGMP message type, such as IGMP v1 membership\r |
772db4bb | 169 | report\r |
170 | @param Group The group address in the IGMP message head.\r | |
171 | \r | |
172 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory to build the message\r | |
173 | @retval EFI_SUCCESS The IGMP message is successfully send\r | |
174 | @retval Others Failed to send the IGMP message.\r | |
175 | \r | |
176 | **/\r | |
177 | EFI_STATUS\r | |
178 | Ip4SendIgmpMessage (\r | |
179 | IN IP4_SERVICE *IpSb,\r | |
180 | IN IP4_ADDR Dst,\r | |
181 | IN UINT8 Type,\r | |
182 | IN IP4_ADDR Group\r | |
183 | )\r | |
184 | {\r | |
185 | IP4_HEAD Head;\r | |
186 | NET_BUF *Packet;\r | |
187 | IGMP_HEAD *Igmp;\r | |
188 | \r | |
189 | //\r | |
190 | // Allocate a net buffer to hold the message\r | |
191 | //\r | |
192 | Packet = NetbufAlloc (IP4_MAX_HEADLEN + sizeof (IGMP_HEAD));\r | |
193 | \r | |
194 | if (Packet == NULL) {\r | |
195 | return EFI_OUT_OF_RESOURCES;\r | |
196 | }\r | |
197 | \r | |
198 | //\r | |
199 | // Fill in the IGMP and IP header, then transmit the message\r | |
200 | //\r | |
201 | NetbufReserve (Packet, IP4_MAX_HEADLEN);\r | |
202 | \r | |
203 | Igmp = (IGMP_HEAD *) NetbufAllocSpace (Packet, sizeof (IGMP_HEAD), FALSE);\r | |
204 | \r | |
205 | Igmp->Type = Type;\r | |
206 | Igmp->MaxRespTime = 0;\r | |
207 | Igmp->Checksum = 0;\r | |
208 | Igmp->Group = HTONL (Group);\r | |
687a2e5f | 209 | Igmp->Checksum = (UINT16) (~NetblockChecksum ((UINT8 *) Igmp, sizeof (IGMP_HEAD)));\r |
772db4bb | 210 | \r |
211 | Head.Tos = 0;\r | |
212 | Head.Protocol = IP4_PROTO_IGMP;\r | |
213 | Head.Ttl = 1;\r | |
214 | Head.Fragment = 0;\r | |
215 | Head.Dst = Dst;\r | |
216 | Head.Src = IP4_ALLZERO_ADDRESS;\r | |
217 | \r | |
218 | return Ip4Output (\r | |
219 | IpSb,\r | |
220 | NULL,\r | |
221 | Packet,\r | |
222 | &Head,\r | |
223 | (UINT8 *) &mRouteAlertOption,\r | |
224 | sizeof (UINT32),\r | |
225 | IP4_ALLZERO_ADDRESS,\r | |
226 | Ip4SysPacketSent,\r | |
227 | NULL\r | |
228 | );\r | |
229 | }\r | |
230 | \r | |
231 | \r | |
232 | /**\r | |
233 | Send an IGMP membership report. Depends on whether the server is\r | |
234 | v1 or v2, it will send either a V1 or V2 membership report.\r | |
235 | \r | |
236 | @param IpSb The IP4 service instance that requests the\r | |
237 | transmission.\r | |
238 | @param Group The group address to report\r | |
239 | \r | |
240 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory to build the message\r | |
241 | @retval EFI_SUCCESS The IGMP report message is successfully send\r | |
242 | @retval Others Failed to send the report.\r | |
243 | \r | |
244 | **/\r | |
245 | EFI_STATUS\r | |
246 | Ip4SendIgmpReport (\r | |
247 | IN IP4_SERVICE *IpSb,\r | |
248 | IN IP4_ADDR Group\r | |
249 | )\r | |
250 | {\r | |
251 | if (IpSb->IgmpCtrl.Igmpv1QuerySeen != 0) {\r | |
252 | return Ip4SendIgmpMessage (IpSb, Group, IGMP_V1_MEMBERSHIP_REPORT, Group);\r | |
253 | } else {\r | |
254 | return Ip4SendIgmpMessage (IpSb, Group, IGMP_V2_MEMBERSHIP_REPORT, Group);\r | |
255 | }\r | |
256 | }\r | |
257 | \r | |
258 | \r | |
259 | /**\r | |
5405e9a6 | 260 | Join the multicast group on behalf of this IP4 child\r |
772db4bb | 261 | \r |
262 | @param IpInstance The IP4 child that wants to join the group\r | |
263 | @param Address The group to join\r | |
264 | \r | |
265 | @retval EFI_SUCCESS Successfully join the multicast group\r | |
266 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resources\r | |
267 | @retval Others Failed to join the multicast group.\r | |
268 | \r | |
269 | **/\r | |
270 | EFI_STATUS\r | |
271 | Ip4JoinGroup (\r | |
272 | IN IP4_PROTOCOL *IpInstance,\r | |
273 | IN IP4_ADDR Address\r | |
274 | )\r | |
275 | {\r | |
276 | EFI_MANAGED_NETWORK_PROTOCOL *Mnp;\r | |
277 | IP4_SERVICE *IpSb;\r | |
278 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
279 | IGMP_GROUP *Group;\r | |
280 | EFI_STATUS Status;\r | |
281 | \r | |
282 | IpSb = IpInstance->Service;\r | |
283 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
284 | Mnp = IpSb->Mnp;\r | |
285 | \r | |
286 | //\r | |
287 | // If the IP service already is a member in the group, just\r | |
288 | // increase the refernce count and return.\r | |
289 | //\r | |
290 | Group = Ip4FindGroup (IgmpCtrl, Address);\r | |
291 | \r | |
292 | if (Group != NULL) {\r | |
293 | Group->RefCnt++;\r | |
294 | return EFI_SUCCESS;\r | |
295 | }\r | |
296 | \r | |
297 | //\r | |
298 | // Otherwise, create a new IGMP_GROUP, Get the multicast's MAC address,\r | |
299 | // send a report, then direct MNP to receive the multicast.\r | |
300 | //\r | |
e48e37fc | 301 | Group = AllocatePool (sizeof (IGMP_GROUP));\r |
772db4bb | 302 | \r |
303 | if (Group == NULL) {\r | |
304 | return EFI_OUT_OF_RESOURCES;\r | |
305 | }\r | |
306 | \r | |
307 | Group->Address = Address;\r | |
308 | Group->RefCnt = 1;\r | |
309 | Group->DelayTime = IGMP_UNSOLICIATED_REPORT;\r | |
310 | Group->ReportByUs = TRUE;\r | |
311 | \r | |
312 | Status = Ip4GetMulticastMac (Mnp, Address, &Group->Mac);\r | |
313 | \r | |
314 | if (EFI_ERROR (Status)) {\r | |
315 | goto ON_ERROR;\r | |
316 | }\r | |
317 | \r | |
318 | Status = Ip4SendIgmpReport (IpSb, Address);\r | |
319 | \r | |
320 | if (EFI_ERROR (Status)) {\r | |
321 | goto ON_ERROR;\r | |
322 | }\r | |
323 | \r | |
324 | Status = Mnp->Groups (Mnp, TRUE, &Group->Mac);\r | |
325 | \r | |
326 | if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {\r | |
327 | goto ON_ERROR;\r | |
328 | }\r | |
329 | \r | |
e48e37fc | 330 | InsertHeadList (&IgmpCtrl->Groups, &Group->Link);\r |
772db4bb | 331 | return EFI_SUCCESS;\r |
332 | \r | |
333 | ON_ERROR:\r | |
e48e37fc | 334 | gBS->FreePool (Group);\r |
772db4bb | 335 | return Status;\r |
336 | }\r | |
337 | \r | |
338 | \r | |
339 | /**\r | |
5405e9a6 | 340 | Leave the IP4 multicast group on behalf of IpInstance.\r |
772db4bb | 341 | \r |
342 | @param IpInstance The IP4 child that wants to leave the group\r | |
343 | address\r | |
344 | @param Address The group address to leave\r | |
345 | \r | |
346 | @retval EFI_NOT_FOUND The IP4 service instance isn't in the group\r | |
347 | @retval EFI_SUCCESS Successfully leave the multicast group.\r | |
348 | @retval Others Failed to leave the multicast group.\r | |
349 | \r | |
350 | **/\r | |
351 | EFI_STATUS\r | |
352 | Ip4LeaveGroup (\r | |
353 | IN IP4_PROTOCOL *IpInstance,\r | |
354 | IN IP4_ADDR Address\r | |
355 | )\r | |
356 | {\r | |
357 | EFI_MANAGED_NETWORK_PROTOCOL *Mnp;\r | |
358 | IP4_SERVICE *IpSb;\r | |
359 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
360 | IGMP_GROUP *Group;\r | |
361 | EFI_STATUS Status;\r | |
362 | \r | |
363 | IpSb = IpInstance->Service;\r | |
364 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
365 | Mnp = IpSb->Mnp;\r | |
366 | \r | |
367 | Group = Ip4FindGroup (IgmpCtrl, Address);\r | |
368 | \r | |
369 | if (Group == NULL) {\r | |
370 | return EFI_NOT_FOUND;\r | |
371 | }\r | |
372 | \r | |
373 | //\r | |
374 | // If more than one instance is in the group, decrease\r | |
375 | // the RefCnt then return.\r | |
376 | //\r | |
377 | if (--Group->RefCnt > 0) {\r | |
378 | return EFI_SUCCESS;\r | |
379 | }\r | |
380 | \r | |
381 | //\r | |
382 | // If multiple IP4 group addresses are mapped to the same\r | |
383 | // multicast MAC address, don't configure the MNP to leave\r | |
384 | // the MAC.\r | |
385 | //\r | |
386 | if (Ip4FindMac (IgmpCtrl, &Group->Mac) == 1) {\r | |
387 | Status = Mnp->Groups (Mnp, FALSE, &Group->Mac);\r | |
388 | \r | |
389 | if (EFI_ERROR (Status) && (Status != EFI_NOT_FOUND)) {\r | |
390 | return Status;\r | |
391 | }\r | |
392 | }\r | |
393 | \r | |
394 | //\r | |
395 | // Send a leave report if the membership is reported by us\r | |
396 | // and we are talking IGMPv2.\r | |
397 | //\r | |
5405e9a6 | 398 | if (Group->ReportByUs && IgmpCtrl->Igmpv1QuerySeen == 0) {\r |
772db4bb | 399 | Ip4SendIgmpMessage (IpSb, IP4_ALLROUTER_ADDRESS, IGMP_LEAVE_GROUP, Group->Address);\r |
400 | }\r | |
401 | \r | |
e48e37fc | 402 | RemoveEntryList (&Group->Link);\r |
403 | gBS->FreePool (Group);\r | |
772db4bb | 404 | \r |
405 | return EFI_SUCCESS;\r | |
406 | }\r | |
407 | \r | |
408 | \r | |
409 | /**\r | |
410 | Handle the received IGMP message for the IP4 service instance.\r | |
411 | \r | |
412 | @param IpSb The IP4 service instance that received the message\r | |
413 | @param Head The IP4 header of the received message\r | |
414 | @param Packet The IGMP message, without IP4 header\r | |
415 | \r | |
416 | @retval EFI_INVALID_PARAMETER The IGMP message is malformated.\r | |
417 | @retval EFI_SUCCESS The IGMP message is successfully processed.\r | |
418 | \r | |
419 | **/\r | |
420 | EFI_STATUS\r | |
421 | Ip4IgmpHandle (\r | |
422 | IN IP4_SERVICE *IpSb,\r | |
423 | IN IP4_HEAD *Head,\r | |
424 | IN NET_BUF *Packet\r | |
425 | )\r | |
426 | {\r | |
427 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
428 | IGMP_HEAD Igmp;\r | |
429 | IGMP_GROUP *Group;\r | |
430 | IP4_ADDR Address;\r | |
e48e37fc | 431 | LIST_ENTRY *Entry;\r |
772db4bb | 432 | \r |
433 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
434 | \r | |
435 | //\r | |
436 | // Must checksum over the whole packet, later IGMP version\r | |
437 | // may employ message longer than 8 bytes. IP's header has\r | |
438 | // already been trimmed off.\r | |
439 | //\r | |
440 | if ((Packet->TotalSize < sizeof (Igmp)) || (NetbufChecksum (Packet) != 0)) {\r | |
441 | NetbufFree (Packet);\r | |
442 | return EFI_INVALID_PARAMETER;\r | |
443 | }\r | |
444 | \r | |
445 | //\r | |
446 | // Copy the packet in case it is fragmented\r | |
447 | //\r | |
448 | NetbufCopy (Packet, 0, sizeof (IGMP_HEAD), (UINT8 *)&Igmp);\r | |
449 | \r | |
450 | switch (Igmp.Type) {\r | |
451 | case IGMP_MEMBERSHIP_QUERY:\r | |
452 | //\r | |
5405e9a6 | 453 | // If MaxRespTime is zero, it is most likely that we are\r |
772db4bb | 454 | // talking to a V1 router\r |
455 | //\r | |
456 | if (Igmp.MaxRespTime == 0) {\r | |
457 | IgmpCtrl->Igmpv1QuerySeen = IGMP_V1ROUTER_PRESENT;\r | |
458 | Igmp.MaxRespTime = 100;\r | |
459 | }\r | |
460 | \r | |
461 | //\r | |
462 | // Igmp is ticking once per second but MaxRespTime is in\r | |
463 | // the unit of 100ms.\r | |
464 | //\r | |
465 | Igmp.MaxRespTime /= 10;\r | |
466 | Address = NTOHL (Igmp.Group);\r | |
467 | \r | |
468 | if (Address == IP4_ALLSYSTEM_ADDRESS) {\r | |
469 | break;\r | |
470 | }\r | |
471 | \r | |
472 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
473 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
474 | \r | |
475 | //\r | |
476 | // If address is all zero, all the memberships will be reported.\r | |
477 | // otherwise only one is reported.\r | |
478 | //\r | |
479 | if ((Address == IP4_ALLZERO_ADDRESS) || (Address == Group->Address)) {\r | |
480 | //\r | |
481 | // If the timer is pending, only update it if the time left\r | |
482 | // is longer than the MaxRespTime. TODO: randomize the DelayTime.\r | |
483 | //\r | |
484 | if ((Group->DelayTime == 0) || (Group->DelayTime > Igmp.MaxRespTime)) {\r | |
36ee91ca | 485 | Group->DelayTime = MAX (1, Igmp.MaxRespTime);\r |
772db4bb | 486 | }\r |
487 | }\r | |
488 | }\r | |
489 | \r | |
490 | break;\r | |
491 | \r | |
492 | case IGMP_V1_MEMBERSHIP_REPORT:\r | |
493 | case IGMP_V2_MEMBERSHIP_REPORT:\r | |
494 | Address = NTOHL (Igmp.Group);\r | |
495 | Group = Ip4FindGroup (IgmpCtrl, Address);\r | |
496 | \r | |
497 | if ((Group != NULL) && (Group->DelayTime > 0)) {\r | |
498 | Group->DelayTime = 0;\r | |
499 | Group->ReportByUs = FALSE;\r | |
500 | }\r | |
501 | \r | |
502 | break;\r | |
503 | }\r | |
504 | \r | |
505 | NetbufFree (Packet);\r | |
506 | return EFI_SUCCESS;\r | |
507 | }\r | |
508 | \r | |
509 | \r | |
510 | /**\r | |
511 | The periodical timer function for IGMP. It does the following\r | |
512 | things:\r | |
513 | 1. Decrease the Igmpv1QuerySeen to make it possible to refresh\r | |
5405e9a6 | 514 | the IGMP server type.\r |
772db4bb | 515 | 2. Decrease the report timer for each IGMP group in "delaying\r |
5405e9a6 | 516 | member" state.\r |
772db4bb | 517 | \r |
518 | @param IpSb The IP4 service instance that is ticking\r | |
519 | \r | |
520 | @return None\r | |
521 | \r | |
522 | **/\r | |
523 | VOID\r | |
524 | Ip4IgmpTicking (\r | |
525 | IN IP4_SERVICE *IpSb\r | |
526 | )\r | |
527 | {\r | |
528 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
e48e37fc | 529 | LIST_ENTRY *Entry;\r |
772db4bb | 530 | IGMP_GROUP *Group;\r |
531 | \r | |
532 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
533 | \r | |
534 | if (IgmpCtrl->Igmpv1QuerySeen > 0) {\r | |
535 | IgmpCtrl->Igmpv1QuerySeen--;\r | |
536 | }\r | |
537 | \r | |
538 | //\r | |
539 | // Decrease the report timer for each IGMP group in "delaying member"\r | |
540 | //\r | |
541 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
542 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
543 | ASSERT (Group->DelayTime >= 0);\r | |
544 | \r | |
545 | if (Group->DelayTime > 0) {\r | |
546 | Group->DelayTime--;\r | |
547 | \r | |
548 | if (Group->DelayTime == 0) {\r | |
549 | Ip4SendIgmpReport (IpSb, Group->Address);\r | |
550 | Group->ReportByUs = TRUE;\r | |
551 | }\r | |
552 | }\r | |
553 | }\r | |
554 | }\r | |
555 | \r | |
556 | \r | |
557 | /**\r | |
558 | Add a group address to the array of group addresses.\r | |
559 | The caller should make sure that no duplicated address\r | |
560 | existed in the array. Although the function doesn't\r | |
561 | assume the byte order of the both Source and Addr, the\r | |
562 | network byte order is used by the caller.\r | |
563 | \r | |
564 | @param Source The array of group addresses to add to\r | |
565 | @param Count The number of group addresses in the Source\r | |
566 | @param Addr The IP4 multicast address to add\r | |
567 | \r | |
568 | @return NULL if failed to allocate memory for the new groups,\r | |
5405e9a6 | 569 | otherwise the new combined group addresses.\r |
772db4bb | 570 | \r |
571 | **/\r | |
572 | IP4_ADDR *\r | |
573 | Ip4CombineGroups (\r | |
574 | IN IP4_ADDR *Source,\r | |
575 | IN UINT32 Count,\r | |
576 | IN IP4_ADDR Addr\r | |
577 | )\r | |
578 | {\r | |
579 | IP4_ADDR *Groups;\r | |
580 | \r | |
e48e37fc | 581 | Groups = AllocatePool (sizeof (IP4_ADDR) * (Count + 1));\r |
772db4bb | 582 | \r |
583 | if (Groups == NULL) {\r | |
584 | return NULL;\r | |
585 | }\r | |
586 | \r | |
e48e37fc | 587 | CopyMem (Groups, Source, Count * sizeof (IP4_ADDR));\r |
772db4bb | 588 | Groups[Count] = Addr;\r |
589 | \r | |
590 | return Groups;\r | |
591 | }\r | |
592 | \r | |
593 | \r | |
594 | /**\r | |
5405e9a6 | 595 | Remove a group address from the array of group addresses.\r |
772db4bb | 596 | Although the function doesn't assume the byte order of the\r |
597 | both Groups and Addr, the network byte order is used by\r | |
598 | the caller.\r | |
599 | \r | |
600 | @param Groups The array of group addresses to remove from\r | |
601 | @param Count The number of group addresses in the Groups\r | |
602 | @param Addr The IP4 multicast address to remove\r | |
603 | \r | |
604 | @return The nubmer of group addresses in the Groups after remove.\r | |
5405e9a6 | 605 | It is Count if the Addr isn't in the Groups.\r |
772db4bb | 606 | \r |
607 | **/\r | |
608 | INTN\r | |
609 | Ip4RemoveGroupAddr (\r | |
5405e9a6 | 610 | IN OUT IP4_ADDR *Groups,\r |
611 | IN UINT32 Count,\r | |
612 | IN IP4_ADDR Addr\r | |
772db4bb | 613 | )\r |
614 | {\r | |
615 | UINT32 Index;\r | |
616 | \r | |
617 | for (Index = 0; Index < Count; Index++) {\r | |
618 | if (Groups[Index] == Addr) {\r | |
619 | break;\r | |
620 | }\r | |
621 | }\r | |
622 | \r | |
623 | while (Index < Count - 1) {\r | |
624 | Groups[Index] = Groups[Index + 1];\r | |
625 | Index++;\r | |
626 | }\r | |
627 | \r | |
628 | return Index;\r | |
629 | }\r |