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Commit | Line | Data |
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772db4bb | 1 | /** @file\r |
3e8c18da | 2 | This file implements the RFC2236: IGMP v2.\r |
d1102dba LG |
3 | \r |
4 | Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
9d510e61 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
772db4bb | 6 | \r |
772db4bb | 7 | **/\r |
8 | \r | |
9 | #include "Ip4Impl.h"\r | |
10 | \r | |
11 | //\r | |
12 | // Route Alert option in IGMP report to direct routers to\r | |
13 | // examine the packet more closely.\r | |
14 | //\r | |
15 | UINT32 mRouteAlertOption = 0x00000494;\r | |
16 | \r | |
17 | \r | |
18 | /**\r | |
19 | Init the IGMP control data of the IP4 service instance, configure\r | |
20 | MNP to receive ALL SYSTEM multicast.\r | |
21 | \r | |
3e8c18da | 22 | @param[in, out] IpSb The IP4 service whose IGMP is to be initialized.\r |
772db4bb | 23 | \r |
5405e9a6 | 24 | @retval EFI_SUCCESS IGMP of the IpSb is successfully initialized.\r |
772db4bb | 25 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resource to initialize IGMP.\r |
26 | @retval Others Failed to initialize the IGMP of IpSb.\r | |
772db4bb | 27 | \r |
28 | **/\r | |
29 | EFI_STATUS\r | |
30 | Ip4InitIgmp (\r | |
5405e9a6 | 31 | IN OUT IP4_SERVICE *IpSb\r |
772db4bb | 32 | )\r |
33 | {\r | |
34 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
35 | EFI_MANAGED_NETWORK_PROTOCOL *Mnp;\r | |
36 | IGMP_GROUP *Group;\r | |
37 | EFI_STATUS Status;\r | |
38 | \r | |
39 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
40 | \r | |
41 | //\r | |
42 | // Configure MNP to receive ALL_SYSTEM multicast\r | |
43 | //\r | |
e48e37fc | 44 | Group = AllocatePool (sizeof (IGMP_GROUP));\r |
772db4bb | 45 | \r |
46 | if (Group == NULL) {\r | |
47 | return EFI_OUT_OF_RESOURCES;\r | |
48 | }\r | |
49 | \r | |
50 | Mnp = IpSb->Mnp;\r | |
51 | \r | |
52 | Group->Address = IP4_ALLSYSTEM_ADDRESS;\r | |
53 | Group->RefCnt = 1;\r | |
54 | Group->DelayTime = 0;\r | |
55 | Group->ReportByUs = FALSE;\r | |
56 | \r | |
57 | Status = Ip4GetMulticastMac (Mnp, IP4_ALLSYSTEM_ADDRESS, &Group->Mac);\r | |
58 | \r | |
59 | if (EFI_ERROR (Status)) {\r | |
60 | goto ON_ERROR;\r | |
61 | }\r | |
62 | \r | |
63 | Status = Mnp->Groups (Mnp, TRUE, &Group->Mac);\r | |
64 | \r | |
65 | if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {\r | |
66 | goto ON_ERROR;\r | |
67 | }\r | |
68 | \r | |
e48e37fc | 69 | InsertHeadList (&IgmpCtrl->Groups, &Group->Link);\r |
772db4bb | 70 | return EFI_SUCCESS;\r |
71 | \r | |
72 | ON_ERROR:\r | |
766c7483 | 73 | FreePool (Group);\r |
772db4bb | 74 | return Status;\r |
75 | }\r | |
76 | \r | |
77 | \r | |
78 | /**\r | |
79 | Find the IGMP_GROUP structure which contains the status of multicast\r | |
80 | group Address in this IGMP control block\r | |
81 | \r | |
1f6729ff | 82 | @param[in] IgmpCtrl The IGMP control block to search from.\r |
83 | @param[in] Address The multicast address to search.\r | |
772db4bb | 84 | \r |
85 | @return NULL if the multicast address isn't in the IGMP control block. Otherwise\r | |
5405e9a6 | 86 | the point to the IGMP_GROUP which contains the status of multicast group\r |
87 | for Address.\r | |
772db4bb | 88 | \r |
89 | **/\r | |
90 | IGMP_GROUP *\r | |
91 | Ip4FindGroup (\r | |
92 | IN IGMP_SERVICE_DATA *IgmpCtrl,\r | |
93 | IN IP4_ADDR Address\r | |
94 | )\r | |
95 | {\r | |
e48e37fc | 96 | LIST_ENTRY *Entry;\r |
772db4bb | 97 | IGMP_GROUP *Group;\r |
98 | \r | |
99 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
100 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
101 | \r | |
102 | if (Group->Address == Address) {\r | |
103 | return Group;\r | |
104 | }\r | |
105 | }\r | |
106 | \r | |
107 | return NULL;\r | |
108 | }\r | |
109 | \r | |
110 | \r | |
111 | /**\r | |
112 | Count the number of IP4 multicast groups that are mapped to the\r | |
113 | same MAC address. Several IP4 multicast address may be mapped to\r | |
114 | the same MAC address.\r | |
115 | \r | |
1f6729ff | 116 | @param[in] IgmpCtrl The IGMP control block to search in.\r |
117 | @param[in] Mac The MAC address to search.\r | |
772db4bb | 118 | \r |
119 | @return The number of the IP4 multicast group that mapped to the same\r | |
5405e9a6 | 120 | multicast group Mac.\r |
772db4bb | 121 | \r |
122 | **/\r | |
123 | INTN\r | |
124 | Ip4FindMac (\r | |
125 | IN IGMP_SERVICE_DATA *IgmpCtrl,\r | |
126 | IN EFI_MAC_ADDRESS *Mac\r | |
127 | )\r | |
128 | {\r | |
e48e37fc | 129 | LIST_ENTRY *Entry;\r |
772db4bb | 130 | IGMP_GROUP *Group;\r |
131 | INTN Count;\r | |
132 | \r | |
133 | Count = 0;\r | |
134 | \r | |
135 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
136 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
137 | \r | |
138 | if (NET_MAC_EQUAL (&Group->Mac, Mac, sizeof (EFI_MAC_ADDRESS))) {\r | |
139 | Count++;\r | |
140 | }\r | |
141 | }\r | |
142 | \r | |
143 | return Count;\r | |
144 | }\r | |
145 | \r | |
146 | \r | |
147 | /**\r | |
148 | Send an IGMP protocol message to the Dst, such as IGMP v1 membership report.\r | |
149 | \r | |
3e8c18da | 150 | @param[in] IpSb The IP4 service instance that requests the\r |
1f6729ff | 151 | transmission.\r |
152 | @param[in] Dst The destinaton to send to.\r | |
3e8c18da | 153 | @param[in] Type The IGMP message type, such as IGMP v1 membership\r |
1f6729ff | 154 | report.\r |
3e8c18da | 155 | @param[in] Group The group address in the IGMP message head.\r |
772db4bb | 156 | \r |
1f6729ff | 157 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory to build the message.\r |
158 | @retval EFI_SUCCESS The IGMP message is successfully send.\r | |
772db4bb | 159 | @retval Others Failed to send the IGMP message.\r |
160 | \r | |
161 | **/\r | |
162 | EFI_STATUS\r | |
163 | Ip4SendIgmpMessage (\r | |
164 | IN IP4_SERVICE *IpSb,\r | |
165 | IN IP4_ADDR Dst,\r | |
166 | IN UINT8 Type,\r | |
167 | IN IP4_ADDR Group\r | |
168 | )\r | |
169 | {\r | |
170 | IP4_HEAD Head;\r | |
171 | NET_BUF *Packet;\r | |
172 | IGMP_HEAD *Igmp;\r | |
173 | \r | |
174 | //\r | |
175 | // Allocate a net buffer to hold the message\r | |
176 | //\r | |
177 | Packet = NetbufAlloc (IP4_MAX_HEADLEN + sizeof (IGMP_HEAD));\r | |
178 | \r | |
179 | if (Packet == NULL) {\r | |
180 | return EFI_OUT_OF_RESOURCES;\r | |
181 | }\r | |
182 | \r | |
183 | //\r | |
184 | // Fill in the IGMP and IP header, then transmit the message\r | |
185 | //\r | |
186 | NetbufReserve (Packet, IP4_MAX_HEADLEN);\r | |
187 | \r | |
188 | Igmp = (IGMP_HEAD *) NetbufAllocSpace (Packet, sizeof (IGMP_HEAD), FALSE);\r | |
894d038a | 189 | if (Igmp == NULL) {\r |
190 | return EFI_OUT_OF_RESOURCES;\r | |
191 | }\r | |
772db4bb | 192 | \r |
193 | Igmp->Type = Type;\r | |
194 | Igmp->MaxRespTime = 0;\r | |
195 | Igmp->Checksum = 0;\r | |
196 | Igmp->Group = HTONL (Group);\r | |
687a2e5f | 197 | Igmp->Checksum = (UINT16) (~NetblockChecksum ((UINT8 *) Igmp, sizeof (IGMP_HEAD)));\r |
772db4bb | 198 | \r |
199 | Head.Tos = 0;\r | |
200 | Head.Protocol = IP4_PROTO_IGMP;\r | |
201 | Head.Ttl = 1;\r | |
202 | Head.Fragment = 0;\r | |
203 | Head.Dst = Dst;\r | |
204 | Head.Src = IP4_ALLZERO_ADDRESS;\r | |
205 | \r | |
206 | return Ip4Output (\r | |
207 | IpSb,\r | |
208 | NULL,\r | |
209 | Packet,\r | |
210 | &Head,\r | |
211 | (UINT8 *) &mRouteAlertOption,\r | |
212 | sizeof (UINT32),\r | |
213 | IP4_ALLZERO_ADDRESS,\r | |
214 | Ip4SysPacketSent,\r | |
215 | NULL\r | |
216 | );\r | |
217 | }\r | |
218 | \r | |
219 | \r | |
220 | /**\r | |
221 | Send an IGMP membership report. Depends on whether the server is\r | |
222 | v1 or v2, it will send either a V1 or V2 membership report.\r | |
223 | \r | |
3e8c18da | 224 | @param[in] IpSb The IP4 service instance that requests the\r |
772db4bb | 225 | transmission.\r |
1f6729ff | 226 | @param[in] Group The group address to report.\r |
772db4bb | 227 | \r |
1f6729ff | 228 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory to build the message.\r |
229 | @retval EFI_SUCCESS The IGMP report message is successfully send.\r | |
772db4bb | 230 | @retval Others Failed to send the report.\r |
231 | \r | |
232 | **/\r | |
233 | EFI_STATUS\r | |
234 | Ip4SendIgmpReport (\r | |
235 | IN IP4_SERVICE *IpSb,\r | |
236 | IN IP4_ADDR Group\r | |
237 | )\r | |
238 | {\r | |
239 | if (IpSb->IgmpCtrl.Igmpv1QuerySeen != 0) {\r | |
240 | return Ip4SendIgmpMessage (IpSb, Group, IGMP_V1_MEMBERSHIP_REPORT, Group);\r | |
241 | } else {\r | |
242 | return Ip4SendIgmpMessage (IpSb, Group, IGMP_V2_MEMBERSHIP_REPORT, Group);\r | |
243 | }\r | |
244 | }\r | |
245 | \r | |
246 | \r | |
247 | /**\r | |
5405e9a6 | 248 | Join the multicast group on behalf of this IP4 child\r |
772db4bb | 249 | \r |
1f6729ff | 250 | @param[in] IpInstance The IP4 child that wants to join the group.\r |
251 | @param[in] Address The group to join.\r | |
772db4bb | 252 | \r |
1f6729ff | 253 | @retval EFI_SUCCESS Successfully join the multicast group.\r |
254 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resources.\r | |
772db4bb | 255 | @retval Others Failed to join the multicast group.\r |
256 | \r | |
257 | **/\r | |
258 | EFI_STATUS\r | |
259 | Ip4JoinGroup (\r | |
260 | IN IP4_PROTOCOL *IpInstance,\r | |
261 | IN IP4_ADDR Address\r | |
262 | )\r | |
263 | {\r | |
264 | EFI_MANAGED_NETWORK_PROTOCOL *Mnp;\r | |
265 | IP4_SERVICE *IpSb;\r | |
266 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
267 | IGMP_GROUP *Group;\r | |
268 | EFI_STATUS Status;\r | |
269 | \r | |
270 | IpSb = IpInstance->Service;\r | |
271 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
272 | Mnp = IpSb->Mnp;\r | |
273 | \r | |
274 | //\r | |
275 | // If the IP service already is a member in the group, just\r | |
276 | // increase the refernce count and return.\r | |
277 | //\r | |
278 | Group = Ip4FindGroup (IgmpCtrl, Address);\r | |
279 | \r | |
280 | if (Group != NULL) {\r | |
281 | Group->RefCnt++;\r | |
282 | return EFI_SUCCESS;\r | |
283 | }\r | |
284 | \r | |
285 | //\r | |
286 | // Otherwise, create a new IGMP_GROUP, Get the multicast's MAC address,\r | |
287 | // send a report, then direct MNP to receive the multicast.\r | |
288 | //\r | |
e48e37fc | 289 | Group = AllocatePool (sizeof (IGMP_GROUP));\r |
772db4bb | 290 | \r |
291 | if (Group == NULL) {\r | |
292 | return EFI_OUT_OF_RESOURCES;\r | |
293 | }\r | |
294 | \r | |
295 | Group->Address = Address;\r | |
296 | Group->RefCnt = 1;\r | |
297 | Group->DelayTime = IGMP_UNSOLICIATED_REPORT;\r | |
298 | Group->ReportByUs = TRUE;\r | |
299 | \r | |
300 | Status = Ip4GetMulticastMac (Mnp, Address, &Group->Mac);\r | |
301 | \r | |
302 | if (EFI_ERROR (Status)) {\r | |
303 | goto ON_ERROR;\r | |
304 | }\r | |
305 | \r | |
306 | Status = Ip4SendIgmpReport (IpSb, Address);\r | |
307 | \r | |
308 | if (EFI_ERROR (Status)) {\r | |
309 | goto ON_ERROR;\r | |
310 | }\r | |
311 | \r | |
312 | Status = Mnp->Groups (Mnp, TRUE, &Group->Mac);\r | |
313 | \r | |
314 | if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {\r | |
315 | goto ON_ERROR;\r | |
316 | }\r | |
317 | \r | |
e48e37fc | 318 | InsertHeadList (&IgmpCtrl->Groups, &Group->Link);\r |
772db4bb | 319 | return EFI_SUCCESS;\r |
320 | \r | |
321 | ON_ERROR:\r | |
766c7483 | 322 | FreePool (Group);\r |
772db4bb | 323 | return Status;\r |
324 | }\r | |
325 | \r | |
326 | \r | |
327 | /**\r | |
5405e9a6 | 328 | Leave the IP4 multicast group on behalf of IpInstance.\r |
772db4bb | 329 | \r |
3e8c18da | 330 | @param[in] IpInstance The IP4 child that wants to leave the group\r |
1f6729ff | 331 | address.\r |
332 | @param[in] Address The group address to leave.\r | |
772db4bb | 333 | \r |
1f6729ff | 334 | @retval EFI_NOT_FOUND The IP4 service instance isn't in the group.\r |
772db4bb | 335 | @retval EFI_SUCCESS Successfully leave the multicast group.\r |
336 | @retval Others Failed to leave the multicast group.\r | |
337 | \r | |
338 | **/\r | |
339 | EFI_STATUS\r | |
340 | Ip4LeaveGroup (\r | |
341 | IN IP4_PROTOCOL *IpInstance,\r | |
342 | IN IP4_ADDR Address\r | |
343 | )\r | |
344 | {\r | |
345 | EFI_MANAGED_NETWORK_PROTOCOL *Mnp;\r | |
346 | IP4_SERVICE *IpSb;\r | |
347 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
348 | IGMP_GROUP *Group;\r | |
349 | EFI_STATUS Status;\r | |
350 | \r | |
351 | IpSb = IpInstance->Service;\r | |
352 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
353 | Mnp = IpSb->Mnp;\r | |
354 | \r | |
355 | Group = Ip4FindGroup (IgmpCtrl, Address);\r | |
356 | \r | |
357 | if (Group == NULL) {\r | |
358 | return EFI_NOT_FOUND;\r | |
359 | }\r | |
360 | \r | |
361 | //\r | |
362 | // If more than one instance is in the group, decrease\r | |
363 | // the RefCnt then return.\r | |
364 | //\r | |
365 | if (--Group->RefCnt > 0) {\r | |
366 | return EFI_SUCCESS;\r | |
367 | }\r | |
368 | \r | |
369 | //\r | |
370 | // If multiple IP4 group addresses are mapped to the same\r | |
371 | // multicast MAC address, don't configure the MNP to leave\r | |
372 | // the MAC.\r | |
373 | //\r | |
374 | if (Ip4FindMac (IgmpCtrl, &Group->Mac) == 1) {\r | |
375 | Status = Mnp->Groups (Mnp, FALSE, &Group->Mac);\r | |
376 | \r | |
377 | if (EFI_ERROR (Status) && (Status != EFI_NOT_FOUND)) {\r | |
378 | return Status;\r | |
379 | }\r | |
380 | }\r | |
381 | \r | |
382 | //\r | |
383 | // Send a leave report if the membership is reported by us\r | |
384 | // and we are talking IGMPv2.\r | |
385 | //\r | |
5405e9a6 | 386 | if (Group->ReportByUs && IgmpCtrl->Igmpv1QuerySeen == 0) {\r |
772db4bb | 387 | Ip4SendIgmpMessage (IpSb, IP4_ALLROUTER_ADDRESS, IGMP_LEAVE_GROUP, Group->Address);\r |
388 | }\r | |
389 | \r | |
e48e37fc | 390 | RemoveEntryList (&Group->Link);\r |
766c7483 | 391 | FreePool (Group);\r |
772db4bb | 392 | \r |
393 | return EFI_SUCCESS;\r | |
394 | }\r | |
395 | \r | |
396 | \r | |
397 | /**\r | |
398 | Handle the received IGMP message for the IP4 service instance.\r | |
399 | \r | |
1f6729ff | 400 | @param[in] IpSb The IP4 service instance that received the message.\r |
401 | @param[in] Head The IP4 header of the received message.\r | |
402 | @param[in] Packet The IGMP message, without IP4 header.\r | |
772db4bb | 403 | \r |
404 | @retval EFI_INVALID_PARAMETER The IGMP message is malformated.\r | |
405 | @retval EFI_SUCCESS The IGMP message is successfully processed.\r | |
406 | \r | |
407 | **/\r | |
408 | EFI_STATUS\r | |
409 | Ip4IgmpHandle (\r | |
410 | IN IP4_SERVICE *IpSb,\r | |
411 | IN IP4_HEAD *Head,\r | |
412 | IN NET_BUF *Packet\r | |
413 | )\r | |
414 | {\r | |
415 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
416 | IGMP_HEAD Igmp;\r | |
417 | IGMP_GROUP *Group;\r | |
418 | IP4_ADDR Address;\r | |
e48e37fc | 419 | LIST_ENTRY *Entry;\r |
772db4bb | 420 | \r |
421 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
422 | \r | |
423 | //\r | |
424 | // Must checksum over the whole packet, later IGMP version\r | |
425 | // may employ message longer than 8 bytes. IP's header has\r | |
426 | // already been trimmed off.\r | |
427 | //\r | |
428 | if ((Packet->TotalSize < sizeof (Igmp)) || (NetbufChecksum (Packet) != 0)) {\r | |
429 | NetbufFree (Packet);\r | |
430 | return EFI_INVALID_PARAMETER;\r | |
431 | }\r | |
432 | \r | |
433 | //\r | |
434 | // Copy the packet in case it is fragmented\r | |
435 | //\r | |
436 | NetbufCopy (Packet, 0, sizeof (IGMP_HEAD), (UINT8 *)&Igmp);\r | |
437 | \r | |
438 | switch (Igmp.Type) {\r | |
439 | case IGMP_MEMBERSHIP_QUERY:\r | |
440 | //\r | |
5405e9a6 | 441 | // If MaxRespTime is zero, it is most likely that we are\r |
772db4bb | 442 | // talking to a V1 router\r |
443 | //\r | |
444 | if (Igmp.MaxRespTime == 0) {\r | |
445 | IgmpCtrl->Igmpv1QuerySeen = IGMP_V1ROUTER_PRESENT;\r | |
446 | Igmp.MaxRespTime = 100;\r | |
447 | }\r | |
448 | \r | |
449 | //\r | |
450 | // Igmp is ticking once per second but MaxRespTime is in\r | |
451 | // the unit of 100ms.\r | |
452 | //\r | |
453 | Igmp.MaxRespTime /= 10;\r | |
454 | Address = NTOHL (Igmp.Group);\r | |
455 | \r | |
456 | if (Address == IP4_ALLSYSTEM_ADDRESS) {\r | |
457 | break;\r | |
458 | }\r | |
459 | \r | |
460 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
461 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
462 | \r | |
463 | //\r | |
464 | // If address is all zero, all the memberships will be reported.\r | |
465 | // otherwise only one is reported.\r | |
466 | //\r | |
467 | if ((Address == IP4_ALLZERO_ADDRESS) || (Address == Group->Address)) {\r | |
468 | //\r | |
469 | // If the timer is pending, only update it if the time left\r | |
470 | // is longer than the MaxRespTime. TODO: randomize the DelayTime.\r | |
471 | //\r | |
472 | if ((Group->DelayTime == 0) || (Group->DelayTime > Igmp.MaxRespTime)) {\r | |
36ee91ca | 473 | Group->DelayTime = MAX (1, Igmp.MaxRespTime);\r |
772db4bb | 474 | }\r |
475 | }\r | |
476 | }\r | |
477 | \r | |
478 | break;\r | |
479 | \r | |
480 | case IGMP_V1_MEMBERSHIP_REPORT:\r | |
481 | case IGMP_V2_MEMBERSHIP_REPORT:\r | |
482 | Address = NTOHL (Igmp.Group);\r | |
483 | Group = Ip4FindGroup (IgmpCtrl, Address);\r | |
484 | \r | |
485 | if ((Group != NULL) && (Group->DelayTime > 0)) {\r | |
486 | Group->DelayTime = 0;\r | |
487 | Group->ReportByUs = FALSE;\r | |
488 | }\r | |
489 | \r | |
490 | break;\r | |
491 | }\r | |
492 | \r | |
493 | NetbufFree (Packet);\r | |
494 | return EFI_SUCCESS;\r | |
495 | }\r | |
496 | \r | |
497 | \r | |
498 | /**\r | |
499 | The periodical timer function for IGMP. It does the following\r | |
500 | things:\r | |
501 | 1. Decrease the Igmpv1QuerySeen to make it possible to refresh\r | |
5405e9a6 | 502 | the IGMP server type.\r |
772db4bb | 503 | 2. Decrease the report timer for each IGMP group in "delaying\r |
5405e9a6 | 504 | member" state.\r |
772db4bb | 505 | \r |
1f6729ff | 506 | @param[in] IpSb The IP4 service instance that is ticking.\r |
772db4bb | 507 | \r |
508 | **/\r | |
509 | VOID\r | |
510 | Ip4IgmpTicking (\r | |
511 | IN IP4_SERVICE *IpSb\r | |
512 | )\r | |
513 | {\r | |
514 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
e48e37fc | 515 | LIST_ENTRY *Entry;\r |
772db4bb | 516 | IGMP_GROUP *Group;\r |
517 | \r | |
518 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
519 | \r | |
520 | if (IgmpCtrl->Igmpv1QuerySeen > 0) {\r | |
521 | IgmpCtrl->Igmpv1QuerySeen--;\r | |
522 | }\r | |
523 | \r | |
524 | //\r | |
525 | // Decrease the report timer for each IGMP group in "delaying member"\r | |
526 | //\r | |
527 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
528 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
529 | ASSERT (Group->DelayTime >= 0);\r | |
530 | \r | |
531 | if (Group->DelayTime > 0) {\r | |
532 | Group->DelayTime--;\r | |
533 | \r | |
534 | if (Group->DelayTime == 0) {\r | |
535 | Ip4SendIgmpReport (IpSb, Group->Address);\r | |
536 | Group->ReportByUs = TRUE;\r | |
537 | }\r | |
538 | }\r | |
539 | }\r | |
540 | }\r | |
541 | \r | |
542 | \r | |
543 | /**\r | |
544 | Add a group address to the array of group addresses.\r | |
545 | The caller should make sure that no duplicated address\r | |
546 | existed in the array. Although the function doesn't\r | |
547 | assume the byte order of the both Source and Addr, the\r | |
548 | network byte order is used by the caller.\r | |
549 | \r | |
1f6729ff | 550 | @param[in] Source The array of group addresses to add to.\r |
551 | @param[in] Count The number of group addresses in the Source.\r | |
552 | @param[in] Addr The IP4 multicast address to add.\r | |
772db4bb | 553 | \r |
554 | @return NULL if failed to allocate memory for the new groups,\r | |
5405e9a6 | 555 | otherwise the new combined group addresses.\r |
772db4bb | 556 | \r |
557 | **/\r | |
558 | IP4_ADDR *\r | |
559 | Ip4CombineGroups (\r | |
560 | IN IP4_ADDR *Source,\r | |
561 | IN UINT32 Count,\r | |
562 | IN IP4_ADDR Addr\r | |
563 | )\r | |
564 | {\r | |
565 | IP4_ADDR *Groups;\r | |
566 | \r | |
e48e37fc | 567 | Groups = AllocatePool (sizeof (IP4_ADDR) * (Count + 1));\r |
772db4bb | 568 | \r |
569 | if (Groups == NULL) {\r | |
570 | return NULL;\r | |
571 | }\r | |
572 | \r | |
e48e37fc | 573 | CopyMem (Groups, Source, Count * sizeof (IP4_ADDR));\r |
772db4bb | 574 | Groups[Count] = Addr;\r |
575 | \r | |
576 | return Groups;\r | |
577 | }\r | |
578 | \r | |
579 | \r | |
580 | /**\r | |
5405e9a6 | 581 | Remove a group address from the array of group addresses.\r |
772db4bb | 582 | Although the function doesn't assume the byte order of the\r |
583 | both Groups and Addr, the network byte order is used by\r | |
584 | the caller.\r | |
585 | \r | |
1f6729ff | 586 | @param Groups The array of group addresses to remove from.\r |
587 | @param Count The number of group addresses in the Groups.\r | |
588 | @param Addr The IP4 multicast address to remove.\r | |
772db4bb | 589 | \r |
590 | @return The nubmer of group addresses in the Groups after remove.\r | |
5405e9a6 | 591 | It is Count if the Addr isn't in the Groups.\r |
772db4bb | 592 | \r |
593 | **/\r | |
594 | INTN\r | |
595 | Ip4RemoveGroupAddr (\r | |
5405e9a6 | 596 | IN OUT IP4_ADDR *Groups,\r |
597 | IN UINT32 Count,\r | |
598 | IN IP4_ADDR Addr\r | |
772db4bb | 599 | )\r |
600 | {\r | |
601 | UINT32 Index;\r | |
602 | \r | |
603 | for (Index = 0; Index < Count; Index++) {\r | |
604 | if (Groups[Index] == Addr) {\r | |
605 | break;\r | |
606 | }\r | |
607 | }\r | |
608 | \r | |
609 | while (Index < Count - 1) {\r | |
610 | Groups[Index] = Groups[Index + 1];\r | |
611 | Index++;\r | |
612 | }\r | |
613 | \r | |
614 | return Index;\r | |
615 | }\r |