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772db4bb | 1 | /** @file\r |
3e8c18da | 2 | This file implements the RFC2236: IGMP v2.\r |
3 | \r | |
4 | Copyright (c) 2005 - 2006, Intel Corporation.<BR>\r | |
772db4bb | 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 | |
12 | \r | |
772db4bb | 13 | **/\r |
14 | \r | |
15 | #include "Ip4Impl.h"\r | |
16 | \r | |
17 | //\r | |
18 | // Route Alert option in IGMP report to direct routers to\r | |
19 | // examine the packet more closely.\r | |
20 | //\r | |
21 | UINT32 mRouteAlertOption = 0x00000494;\r | |
22 | \r | |
23 | \r | |
24 | /**\r | |
25 | Init the IGMP control data of the IP4 service instance, configure\r | |
26 | MNP to receive ALL SYSTEM multicast.\r | |
27 | \r | |
3e8c18da | 28 | @param[in, out] IpSb The IP4 service whose IGMP is to be initialized.\r |
772db4bb | 29 | \r |
5405e9a6 | 30 | @retval EFI_SUCCESS IGMP of the IpSb is successfully initialized.\r |
772db4bb | 31 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resource to initialize IGMP.\r |
32 | @retval Others Failed to initialize the IGMP of IpSb.\r | |
772db4bb | 33 | \r |
34 | **/\r | |
35 | EFI_STATUS\r | |
36 | Ip4InitIgmp (\r | |
5405e9a6 | 37 | IN OUT IP4_SERVICE *IpSb\r |
772db4bb | 38 | )\r |
39 | {\r | |
40 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
41 | EFI_MANAGED_NETWORK_PROTOCOL *Mnp;\r | |
42 | IGMP_GROUP *Group;\r | |
43 | EFI_STATUS Status;\r | |
44 | \r | |
45 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
46 | \r | |
47 | //\r | |
48 | // Configure MNP to receive ALL_SYSTEM multicast\r | |
49 | //\r | |
e48e37fc | 50 | Group = AllocatePool (sizeof (IGMP_GROUP));\r |
772db4bb | 51 | \r |
52 | if (Group == NULL) {\r | |
53 | return EFI_OUT_OF_RESOURCES;\r | |
54 | }\r | |
55 | \r | |
56 | Mnp = IpSb->Mnp;\r | |
57 | \r | |
58 | Group->Address = IP4_ALLSYSTEM_ADDRESS;\r | |
59 | Group->RefCnt = 1;\r | |
60 | Group->DelayTime = 0;\r | |
61 | Group->ReportByUs = FALSE;\r | |
62 | \r | |
63 | Status = Ip4GetMulticastMac (Mnp, IP4_ALLSYSTEM_ADDRESS, &Group->Mac);\r | |
64 | \r | |
65 | if (EFI_ERROR (Status)) {\r | |
66 | goto ON_ERROR;\r | |
67 | }\r | |
68 | \r | |
69 | Status = Mnp->Groups (Mnp, TRUE, &Group->Mac);\r | |
70 | \r | |
71 | if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {\r | |
72 | goto ON_ERROR;\r | |
73 | }\r | |
74 | \r | |
e48e37fc | 75 | InsertHeadList (&IgmpCtrl->Groups, &Group->Link);\r |
772db4bb | 76 | return EFI_SUCCESS;\r |
77 | \r | |
78 | ON_ERROR:\r | |
e48e37fc | 79 | gBS->FreePool (Group);\r |
772db4bb | 80 | return Status;\r |
81 | }\r | |
82 | \r | |
83 | \r | |
84 | /**\r | |
85 | Find the IGMP_GROUP structure which contains the status of multicast\r | |
86 | group Address in this IGMP control block\r | |
87 | \r | |
3e8c18da | 88 | @param[in] IgmpCtrl The IGMP control block to search from\r |
89 | @param[in] Address The multicast address to search\r | |
772db4bb | 90 | \r |
91 | @return NULL if the multicast address isn't in the IGMP control block. Otherwise\r | |
5405e9a6 | 92 | the point to the IGMP_GROUP which contains the status of multicast group\r |
93 | for Address.\r | |
772db4bb | 94 | \r |
95 | **/\r | |
96 | IGMP_GROUP *\r | |
97 | Ip4FindGroup (\r | |
98 | IN IGMP_SERVICE_DATA *IgmpCtrl,\r | |
99 | IN IP4_ADDR Address\r | |
100 | )\r | |
101 | {\r | |
e48e37fc | 102 | LIST_ENTRY *Entry;\r |
772db4bb | 103 | IGMP_GROUP *Group;\r |
104 | \r | |
105 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
106 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
107 | \r | |
108 | if (Group->Address == Address) {\r | |
109 | return Group;\r | |
110 | }\r | |
111 | }\r | |
112 | \r | |
113 | return NULL;\r | |
114 | }\r | |
115 | \r | |
116 | \r | |
117 | /**\r | |
118 | Count the number of IP4 multicast groups that are mapped to the\r | |
119 | same MAC address. Several IP4 multicast address may be mapped to\r | |
120 | the same MAC address.\r | |
121 | \r | |
3e8c18da | 122 | @param[in] IgmpCtrl The IGMP control block to search in\r |
123 | @param[in] Mac The MAC address to search\r | |
772db4bb | 124 | \r |
125 | @return The number of the IP4 multicast group that mapped to the same\r | |
5405e9a6 | 126 | multicast group Mac.\r |
772db4bb | 127 | \r |
128 | **/\r | |
129 | INTN\r | |
130 | Ip4FindMac (\r | |
131 | IN IGMP_SERVICE_DATA *IgmpCtrl,\r | |
132 | IN EFI_MAC_ADDRESS *Mac\r | |
133 | )\r | |
134 | {\r | |
e48e37fc | 135 | LIST_ENTRY *Entry;\r |
772db4bb | 136 | IGMP_GROUP *Group;\r |
137 | INTN Count;\r | |
138 | \r | |
139 | Count = 0;\r | |
140 | \r | |
141 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
142 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
143 | \r | |
144 | if (NET_MAC_EQUAL (&Group->Mac, Mac, sizeof (EFI_MAC_ADDRESS))) {\r | |
145 | Count++;\r | |
146 | }\r | |
147 | }\r | |
148 | \r | |
149 | return Count;\r | |
150 | }\r | |
151 | \r | |
152 | \r | |
153 | /**\r | |
154 | Send an IGMP protocol message to the Dst, such as IGMP v1 membership report.\r | |
155 | \r | |
3e8c18da | 156 | @param[in] IpSb The IP4 service instance that requests the\r |
772db4bb | 157 | transmission\r |
3e8c18da | 158 | @param[in] Dst The destinaton to send to\r |
159 | @param[in] Type The IGMP message type, such as IGMP v1 membership\r | |
772db4bb | 160 | report\r |
3e8c18da | 161 | @param[in] Group The group address in the IGMP message head.\r |
772db4bb | 162 | \r |
163 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory to build the message\r | |
164 | @retval EFI_SUCCESS The IGMP message is successfully send\r | |
165 | @retval Others Failed to send the IGMP message.\r | |
166 | \r | |
167 | **/\r | |
168 | EFI_STATUS\r | |
169 | Ip4SendIgmpMessage (\r | |
170 | IN IP4_SERVICE *IpSb,\r | |
171 | IN IP4_ADDR Dst,\r | |
172 | IN UINT8 Type,\r | |
173 | IN IP4_ADDR Group\r | |
174 | )\r | |
175 | {\r | |
176 | IP4_HEAD Head;\r | |
177 | NET_BUF *Packet;\r | |
178 | IGMP_HEAD *Igmp;\r | |
179 | \r | |
180 | //\r | |
181 | // Allocate a net buffer to hold the message\r | |
182 | //\r | |
183 | Packet = NetbufAlloc (IP4_MAX_HEADLEN + sizeof (IGMP_HEAD));\r | |
184 | \r | |
185 | if (Packet == NULL) {\r | |
186 | return EFI_OUT_OF_RESOURCES;\r | |
187 | }\r | |
188 | \r | |
189 | //\r | |
190 | // Fill in the IGMP and IP header, then transmit the message\r | |
191 | //\r | |
192 | NetbufReserve (Packet, IP4_MAX_HEADLEN);\r | |
193 | \r | |
194 | Igmp = (IGMP_HEAD *) NetbufAllocSpace (Packet, sizeof (IGMP_HEAD), FALSE);\r | |
195 | \r | |
196 | Igmp->Type = Type;\r | |
197 | Igmp->MaxRespTime = 0;\r | |
198 | Igmp->Checksum = 0;\r | |
199 | Igmp->Group = HTONL (Group);\r | |
687a2e5f | 200 | Igmp->Checksum = (UINT16) (~NetblockChecksum ((UINT8 *) Igmp, sizeof (IGMP_HEAD)));\r |
772db4bb | 201 | \r |
202 | Head.Tos = 0;\r | |
203 | Head.Protocol = IP4_PROTO_IGMP;\r | |
204 | Head.Ttl = 1;\r | |
205 | Head.Fragment = 0;\r | |
206 | Head.Dst = Dst;\r | |
207 | Head.Src = IP4_ALLZERO_ADDRESS;\r | |
208 | \r | |
209 | return Ip4Output (\r | |
210 | IpSb,\r | |
211 | NULL,\r | |
212 | Packet,\r | |
213 | &Head,\r | |
214 | (UINT8 *) &mRouteAlertOption,\r | |
215 | sizeof (UINT32),\r | |
216 | IP4_ALLZERO_ADDRESS,\r | |
217 | Ip4SysPacketSent,\r | |
218 | NULL\r | |
219 | );\r | |
220 | }\r | |
221 | \r | |
222 | \r | |
223 | /**\r | |
224 | Send an IGMP membership report. Depends on whether the server is\r | |
225 | v1 or v2, it will send either a V1 or V2 membership report.\r | |
226 | \r | |
3e8c18da | 227 | @param[in] IpSb The IP4 service instance that requests the\r |
772db4bb | 228 | transmission.\r |
3e8c18da | 229 | @param[in] Group The group address to report\r |
772db4bb | 230 | \r |
231 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory to build the message\r | |
232 | @retval EFI_SUCCESS The IGMP report message is successfully send\r | |
233 | @retval Others Failed to send the report.\r | |
234 | \r | |
235 | **/\r | |
236 | EFI_STATUS\r | |
237 | Ip4SendIgmpReport (\r | |
238 | IN IP4_SERVICE *IpSb,\r | |
239 | IN IP4_ADDR Group\r | |
240 | )\r | |
241 | {\r | |
242 | if (IpSb->IgmpCtrl.Igmpv1QuerySeen != 0) {\r | |
243 | return Ip4SendIgmpMessage (IpSb, Group, IGMP_V1_MEMBERSHIP_REPORT, Group);\r | |
244 | } else {\r | |
245 | return Ip4SendIgmpMessage (IpSb, Group, IGMP_V2_MEMBERSHIP_REPORT, Group);\r | |
246 | }\r | |
247 | }\r | |
248 | \r | |
249 | \r | |
250 | /**\r | |
5405e9a6 | 251 | Join the multicast group on behalf of this IP4 child\r |
772db4bb | 252 | \r |
3e8c18da | 253 | @param[in] IpInstance The IP4 child that wants to join the group\r |
254 | @param[in] Address The group to join\r | |
772db4bb | 255 | \r |
256 | @retval EFI_SUCCESS Successfully join the multicast group\r | |
257 | @retval EFI_OUT_OF_RESOURCES Failed to allocate resources\r | |
258 | @retval Others Failed to join the multicast group.\r | |
259 | \r | |
260 | **/\r | |
261 | EFI_STATUS\r | |
262 | Ip4JoinGroup (\r | |
263 | IN IP4_PROTOCOL *IpInstance,\r | |
264 | IN IP4_ADDR Address\r | |
265 | )\r | |
266 | {\r | |
267 | EFI_MANAGED_NETWORK_PROTOCOL *Mnp;\r | |
268 | IP4_SERVICE *IpSb;\r | |
269 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
270 | IGMP_GROUP *Group;\r | |
271 | EFI_STATUS Status;\r | |
272 | \r | |
273 | IpSb = IpInstance->Service;\r | |
274 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
275 | Mnp = IpSb->Mnp;\r | |
276 | \r | |
277 | //\r | |
278 | // If the IP service already is a member in the group, just\r | |
279 | // increase the refernce count and return.\r | |
280 | //\r | |
281 | Group = Ip4FindGroup (IgmpCtrl, Address);\r | |
282 | \r | |
283 | if (Group != NULL) {\r | |
284 | Group->RefCnt++;\r | |
285 | return EFI_SUCCESS;\r | |
286 | }\r | |
287 | \r | |
288 | //\r | |
289 | // Otherwise, create a new IGMP_GROUP, Get the multicast's MAC address,\r | |
290 | // send a report, then direct MNP to receive the multicast.\r | |
291 | //\r | |
e48e37fc | 292 | Group = AllocatePool (sizeof (IGMP_GROUP));\r |
772db4bb | 293 | \r |
294 | if (Group == NULL) {\r | |
295 | return EFI_OUT_OF_RESOURCES;\r | |
296 | }\r | |
297 | \r | |
298 | Group->Address = Address;\r | |
299 | Group->RefCnt = 1;\r | |
300 | Group->DelayTime = IGMP_UNSOLICIATED_REPORT;\r | |
301 | Group->ReportByUs = TRUE;\r | |
302 | \r | |
303 | Status = Ip4GetMulticastMac (Mnp, Address, &Group->Mac);\r | |
304 | \r | |
305 | if (EFI_ERROR (Status)) {\r | |
306 | goto ON_ERROR;\r | |
307 | }\r | |
308 | \r | |
309 | Status = Ip4SendIgmpReport (IpSb, Address);\r | |
310 | \r | |
311 | if (EFI_ERROR (Status)) {\r | |
312 | goto ON_ERROR;\r | |
313 | }\r | |
314 | \r | |
315 | Status = Mnp->Groups (Mnp, TRUE, &Group->Mac);\r | |
316 | \r | |
317 | if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {\r | |
318 | goto ON_ERROR;\r | |
319 | }\r | |
320 | \r | |
e48e37fc | 321 | InsertHeadList (&IgmpCtrl->Groups, &Group->Link);\r |
772db4bb | 322 | return EFI_SUCCESS;\r |
323 | \r | |
324 | ON_ERROR:\r | |
e48e37fc | 325 | gBS->FreePool (Group);\r |
772db4bb | 326 | return Status;\r |
327 | }\r | |
328 | \r | |
329 | \r | |
330 | /**\r | |
5405e9a6 | 331 | Leave the IP4 multicast group on behalf of IpInstance.\r |
772db4bb | 332 | \r |
3e8c18da | 333 | @param[in] IpInstance The IP4 child that wants to leave the group\r |
772db4bb | 334 | address\r |
3e8c18da | 335 | @param[in] Address The group address to leave\r |
772db4bb | 336 | \r |
337 | @retval EFI_NOT_FOUND The IP4 service instance isn't in the group\r | |
338 | @retval EFI_SUCCESS Successfully leave the multicast group.\r | |
339 | @retval Others Failed to leave the multicast group.\r | |
340 | \r | |
341 | **/\r | |
342 | EFI_STATUS\r | |
343 | Ip4LeaveGroup (\r | |
344 | IN IP4_PROTOCOL *IpInstance,\r | |
345 | IN IP4_ADDR Address\r | |
346 | )\r | |
347 | {\r | |
348 | EFI_MANAGED_NETWORK_PROTOCOL *Mnp;\r | |
349 | IP4_SERVICE *IpSb;\r | |
350 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
351 | IGMP_GROUP *Group;\r | |
352 | EFI_STATUS Status;\r | |
353 | \r | |
354 | IpSb = IpInstance->Service;\r | |
355 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
356 | Mnp = IpSb->Mnp;\r | |
357 | \r | |
358 | Group = Ip4FindGroup (IgmpCtrl, Address);\r | |
359 | \r | |
360 | if (Group == NULL) {\r | |
361 | return EFI_NOT_FOUND;\r | |
362 | }\r | |
363 | \r | |
364 | //\r | |
365 | // If more than one instance is in the group, decrease\r | |
366 | // the RefCnt then return.\r | |
367 | //\r | |
368 | if (--Group->RefCnt > 0) {\r | |
369 | return EFI_SUCCESS;\r | |
370 | }\r | |
371 | \r | |
372 | //\r | |
373 | // If multiple IP4 group addresses are mapped to the same\r | |
374 | // multicast MAC address, don't configure the MNP to leave\r | |
375 | // the MAC.\r | |
376 | //\r | |
377 | if (Ip4FindMac (IgmpCtrl, &Group->Mac) == 1) {\r | |
378 | Status = Mnp->Groups (Mnp, FALSE, &Group->Mac);\r | |
379 | \r | |
380 | if (EFI_ERROR (Status) && (Status != EFI_NOT_FOUND)) {\r | |
381 | return Status;\r | |
382 | }\r | |
383 | }\r | |
384 | \r | |
385 | //\r | |
386 | // Send a leave report if the membership is reported by us\r | |
387 | // and we are talking IGMPv2.\r | |
388 | //\r | |
5405e9a6 | 389 | if (Group->ReportByUs && IgmpCtrl->Igmpv1QuerySeen == 0) {\r |
772db4bb | 390 | Ip4SendIgmpMessage (IpSb, IP4_ALLROUTER_ADDRESS, IGMP_LEAVE_GROUP, Group->Address);\r |
391 | }\r | |
392 | \r | |
e48e37fc | 393 | RemoveEntryList (&Group->Link);\r |
394 | gBS->FreePool (Group);\r | |
772db4bb | 395 | \r |
396 | return EFI_SUCCESS;\r | |
397 | }\r | |
398 | \r | |
399 | \r | |
400 | /**\r | |
401 | Handle the received IGMP message for the IP4 service instance.\r | |
402 | \r | |
3e8c18da | 403 | @param[in] IpSb The IP4 service instance that received the message\r |
404 | @param[in] Head The IP4 header of the received message\r | |
405 | @param[in] Packet The IGMP message, without IP4 header\r | |
772db4bb | 406 | \r |
407 | @retval EFI_INVALID_PARAMETER The IGMP message is malformated.\r | |
408 | @retval EFI_SUCCESS The IGMP message is successfully processed.\r | |
409 | \r | |
410 | **/\r | |
411 | EFI_STATUS\r | |
412 | Ip4IgmpHandle (\r | |
413 | IN IP4_SERVICE *IpSb,\r | |
414 | IN IP4_HEAD *Head,\r | |
415 | IN NET_BUF *Packet\r | |
416 | )\r | |
417 | {\r | |
418 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
419 | IGMP_HEAD Igmp;\r | |
420 | IGMP_GROUP *Group;\r | |
421 | IP4_ADDR Address;\r | |
e48e37fc | 422 | LIST_ENTRY *Entry;\r |
772db4bb | 423 | \r |
424 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
425 | \r | |
426 | //\r | |
427 | // Must checksum over the whole packet, later IGMP version\r | |
428 | // may employ message longer than 8 bytes. IP's header has\r | |
429 | // already been trimmed off.\r | |
430 | //\r | |
431 | if ((Packet->TotalSize < sizeof (Igmp)) || (NetbufChecksum (Packet) != 0)) {\r | |
432 | NetbufFree (Packet);\r | |
433 | return EFI_INVALID_PARAMETER;\r | |
434 | }\r | |
435 | \r | |
436 | //\r | |
437 | // Copy the packet in case it is fragmented\r | |
438 | //\r | |
439 | NetbufCopy (Packet, 0, sizeof (IGMP_HEAD), (UINT8 *)&Igmp);\r | |
440 | \r | |
441 | switch (Igmp.Type) {\r | |
442 | case IGMP_MEMBERSHIP_QUERY:\r | |
443 | //\r | |
5405e9a6 | 444 | // If MaxRespTime is zero, it is most likely that we are\r |
772db4bb | 445 | // talking to a V1 router\r |
446 | //\r | |
447 | if (Igmp.MaxRespTime == 0) {\r | |
448 | IgmpCtrl->Igmpv1QuerySeen = IGMP_V1ROUTER_PRESENT;\r | |
449 | Igmp.MaxRespTime = 100;\r | |
450 | }\r | |
451 | \r | |
452 | //\r | |
453 | // Igmp is ticking once per second but MaxRespTime is in\r | |
454 | // the unit of 100ms.\r | |
455 | //\r | |
456 | Igmp.MaxRespTime /= 10;\r | |
457 | Address = NTOHL (Igmp.Group);\r | |
458 | \r | |
459 | if (Address == IP4_ALLSYSTEM_ADDRESS) {\r | |
460 | break;\r | |
461 | }\r | |
462 | \r | |
463 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
464 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
465 | \r | |
466 | //\r | |
467 | // If address is all zero, all the memberships will be reported.\r | |
468 | // otherwise only one is reported.\r | |
469 | //\r | |
470 | if ((Address == IP4_ALLZERO_ADDRESS) || (Address == Group->Address)) {\r | |
471 | //\r | |
472 | // If the timer is pending, only update it if the time left\r | |
473 | // is longer than the MaxRespTime. TODO: randomize the DelayTime.\r | |
474 | //\r | |
475 | if ((Group->DelayTime == 0) || (Group->DelayTime > Igmp.MaxRespTime)) {\r | |
36ee91ca | 476 | Group->DelayTime = MAX (1, Igmp.MaxRespTime);\r |
772db4bb | 477 | }\r |
478 | }\r | |
479 | }\r | |
480 | \r | |
481 | break;\r | |
482 | \r | |
483 | case IGMP_V1_MEMBERSHIP_REPORT:\r | |
484 | case IGMP_V2_MEMBERSHIP_REPORT:\r | |
485 | Address = NTOHL (Igmp.Group);\r | |
486 | Group = Ip4FindGroup (IgmpCtrl, Address);\r | |
487 | \r | |
488 | if ((Group != NULL) && (Group->DelayTime > 0)) {\r | |
489 | Group->DelayTime = 0;\r | |
490 | Group->ReportByUs = FALSE;\r | |
491 | }\r | |
492 | \r | |
493 | break;\r | |
494 | }\r | |
495 | \r | |
496 | NetbufFree (Packet);\r | |
497 | return EFI_SUCCESS;\r | |
498 | }\r | |
499 | \r | |
500 | \r | |
501 | /**\r | |
502 | The periodical timer function for IGMP. It does the following\r | |
503 | things:\r | |
504 | 1. Decrease the Igmpv1QuerySeen to make it possible to refresh\r | |
5405e9a6 | 505 | the IGMP server type.\r |
772db4bb | 506 | 2. Decrease the report timer for each IGMP group in "delaying\r |
5405e9a6 | 507 | member" state.\r |
772db4bb | 508 | \r |
3e8c18da | 509 | @param[in] IpSb The IP4 service instance that is ticking\r |
772db4bb | 510 | \r |
511 | **/\r | |
512 | VOID\r | |
513 | Ip4IgmpTicking (\r | |
514 | IN IP4_SERVICE *IpSb\r | |
515 | )\r | |
516 | {\r | |
517 | IGMP_SERVICE_DATA *IgmpCtrl;\r | |
e48e37fc | 518 | LIST_ENTRY *Entry;\r |
772db4bb | 519 | IGMP_GROUP *Group;\r |
520 | \r | |
521 | IgmpCtrl = &IpSb->IgmpCtrl;\r | |
522 | \r | |
523 | if (IgmpCtrl->Igmpv1QuerySeen > 0) {\r | |
524 | IgmpCtrl->Igmpv1QuerySeen--;\r | |
525 | }\r | |
526 | \r | |
527 | //\r | |
528 | // Decrease the report timer for each IGMP group in "delaying member"\r | |
529 | //\r | |
530 | NET_LIST_FOR_EACH (Entry, &IgmpCtrl->Groups) {\r | |
531 | Group = NET_LIST_USER_STRUCT (Entry, IGMP_GROUP, Link);\r | |
532 | ASSERT (Group->DelayTime >= 0);\r | |
533 | \r | |
534 | if (Group->DelayTime > 0) {\r | |
535 | Group->DelayTime--;\r | |
536 | \r | |
537 | if (Group->DelayTime == 0) {\r | |
538 | Ip4SendIgmpReport (IpSb, Group->Address);\r | |
539 | Group->ReportByUs = TRUE;\r | |
540 | }\r | |
541 | }\r | |
542 | }\r | |
543 | }\r | |
544 | \r | |
545 | \r | |
546 | /**\r | |
547 | Add a group address to the array of group addresses.\r | |
548 | The caller should make sure that no duplicated address\r | |
549 | existed in the array. Although the function doesn't\r | |
550 | assume the byte order of the both Source and Addr, the\r | |
551 | network byte order is used by the caller.\r | |
552 | \r | |
3e8c18da | 553 | @param[in] Source The array of group addresses to add to\r |
554 | @param[in] Count The number of group addresses in the Source\r | |
555 | @param[in] Addr The IP4 multicast address to add\r | |
772db4bb | 556 | \r |
557 | @return NULL if failed to allocate memory for the new groups,\r | |
5405e9a6 | 558 | otherwise the new combined group addresses.\r |
772db4bb | 559 | \r |
560 | **/\r | |
561 | IP4_ADDR *\r | |
562 | Ip4CombineGroups (\r | |
563 | IN IP4_ADDR *Source,\r | |
564 | IN UINT32 Count,\r | |
565 | IN IP4_ADDR Addr\r | |
566 | )\r | |
567 | {\r | |
568 | IP4_ADDR *Groups;\r | |
569 | \r | |
e48e37fc | 570 | Groups = AllocatePool (sizeof (IP4_ADDR) * (Count + 1));\r |
772db4bb | 571 | \r |
572 | if (Groups == NULL) {\r | |
573 | return NULL;\r | |
574 | }\r | |
575 | \r | |
e48e37fc | 576 | CopyMem (Groups, Source, Count * sizeof (IP4_ADDR));\r |
772db4bb | 577 | Groups[Count] = Addr;\r |
578 | \r | |
579 | return Groups;\r | |
580 | }\r | |
581 | \r | |
582 | \r | |
583 | /**\r | |
5405e9a6 | 584 | Remove a group address from the array of group addresses.\r |
772db4bb | 585 | Although the function doesn't assume the byte order of the\r |
586 | both Groups and Addr, the network byte order is used by\r | |
587 | the caller.\r | |
588 | \r | |
3e8c18da | 589 | @param Groups The array of group addresses to remove from\r |
590 | @param Count The number of group addresses in the Groups\r | |
591 | @param Addr The IP4 multicast address to remove\r | |
772db4bb | 592 | \r |
593 | @return The nubmer of group addresses in the Groups after remove.\r | |
5405e9a6 | 594 | It is Count if the Addr isn't in the Groups.\r |
772db4bb | 595 | \r |
596 | **/\r | |
597 | INTN\r | |
598 | Ip4RemoveGroupAddr (\r | |
5405e9a6 | 599 | IN OUT IP4_ADDR *Groups,\r |
600 | IN UINT32 Count,\r | |
601 | IN IP4_ADDR Addr\r | |
772db4bb | 602 | )\r |
603 | {\r | |
604 | UINT32 Index;\r | |
605 | \r | |
606 | for (Index = 0; Index < Count; Index++) {\r | |
607 | if (Groups[Index] == Addr) {\r | |
608 | break;\r | |
609 | }\r | |
610 | }\r | |
611 | \r | |
612 | while (Index < Count - 1) {\r | |
613 | Groups[Index] = Groups[Index + 1];\r | |
614 | Index++;\r | |
615 | }\r | |
616 | \r | |
617 | return Index;\r | |
618 | }\r |