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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <src/config.h>
#include <stdio.h>
#include <src/core/numberSet.h>
#include <src/processor/fibEntry.h>
#include <src/core/nameBitvector.h>
#include <src/strategies/loadBalancer.h>
#include <src/strategies/loadBalancerWithPD.h>
#include <src/strategies/rnd.h>
#include <src/strategies/rndSegment.h>
#include <src/strategies/strategyImpl.h>
#ifdef WITH_MAPME
#include <parc/algol/parc_HashMap.h>
#include <src/core/ticks.h>
#endif /* WITH_MAPME */
#include <parc/algol/parc_Memory.h>
#include <parc/assert/parc_Assert.h>
#include <src/utils/commands.h>
struct fib_entry {
Name *name;
unsigned refcount;
StrategyImpl *fwdStrategy;
#ifdef WITH_MAPME
void *userData;
void (*userDataRelease)(void **userData);
#endif /* WITH_MAPME */
};
FibEntry *fibEntry_Create(Name *name, strategy_type fwdStrategy) {
FibEntry *fibEntry = parcMemory_AllocateAndClear(sizeof(FibEntry));
parcAssertNotNull(fibEntry, "parcMemory_AllocateAndClear(%zu) returned NULL",
sizeof(FibEntry));
fibEntry->name = name_Acquire(name);
if (fwdStrategy) {
switch (fwdStrategy) {
case SET_STRATEGY_LOADBALANCER:
fibEntry->fwdStrategy = strategyLoadBalancer_Create();
break;
case SET_STRATEGY_RANDOM_PER_DASH_SEGMENT:
fibEntry->fwdStrategy = strategyRndSegment_Create();
break;
case SET_STRATEGY_LOADBALANCER_WITH_DELAY:
fibEntry->fwdStrategy = strategyLoadBalancerWithPD_Create();
break;
default:
// LB is the defualt strategy
fibEntry->fwdStrategy = strategyLoadBalancer_Create();
// the LB strategy is the default one
// other strategies can be set using the appropiate function
break;
}
} else {
fibEntry->fwdStrategy = strategyLoadBalancer_Create();
}
fibEntry->refcount = 1;
#ifdef WITH_MAPME
fibEntry->userData = NULL;
fibEntry->userDataRelease = NULL;
#endif /* WITH_MAPME */
return fibEntry;
}
FibEntry *fibEntry_Acquire(const FibEntry *fibEntry) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
FibEntry *copy = (FibEntry *)fibEntry;
copy->refcount++;
return copy;
}
void fibEntry_Release(FibEntry **fibEntryPtr) {
FibEntry *fibEntry = *fibEntryPtr;
parcAssertTrue(fibEntry->refcount > 0, "Illegal state: refcount is 0");
fibEntry->refcount--;
if (fibEntry->refcount == 0) {
name_Release(&fibEntry->name);
fibEntry->fwdStrategy->destroy(&(fibEntry->fwdStrategy));
#ifdef WITH_MAPME
if (fibEntry->userData) {
fibEntry->userDataRelease(&fibEntry->userData);
}
#endif /* WITH_MAPME */
parcMemory_Deallocate((void **)&fibEntry);
}
*fibEntryPtr = NULL;
}
void fibEntry_SetStrategy(FibEntry *fibEntry, strategy_type strategy) {
StrategyImpl *fwdStrategyImpl;
switch (strategy) {
case SET_STRATEGY_LOADBALANCER:
fwdStrategyImpl = strategyLoadBalancer_Create();
break;
case SET_STRATEGY_RANDOM_PER_DASH_SEGMENT:
fwdStrategyImpl = strategyRndSegment_Create();
break;
case SET_STRATEGY_LOADBALANCER_WITH_DELAY:
fwdStrategyImpl = strategyLoadBalancerWithPD_Create();
break;
default:
// LB is the defualt strategy
fwdStrategyImpl = strategyLoadBalancer_Create();
// the LB strategy is the default one
// other strategies can be set using the appropiate function
break;
}
const NumberSet *nexthops = fibEntry_GetNexthops(fibEntry);
unsigned size = fibEntry_NexthopCount(fibEntry);
for (unsigned i = 0; i < size; i++) {
fwdStrategyImpl->addNexthop(fwdStrategyImpl,
numberSet_GetItem(nexthops, i));
}
fibEntry->fwdStrategy->destroy(&(fibEntry->fwdStrategy));
fibEntry->fwdStrategy = fwdStrategyImpl;
}
void fibEntry_AddNexthop(FibEntry *fibEntry, unsigned connectionId) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
fibEntry->fwdStrategy->addNexthop(fibEntry->fwdStrategy, connectionId);
}
void fibEntry_RemoveNexthopByConnectionId(FibEntry *fibEntry,
unsigned connectionId) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
fibEntry->fwdStrategy->removeNexthop(fibEntry->fwdStrategy, connectionId);
}
size_t fibEntry_NexthopCount(const FibEntry *fibEntry) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
return fibEntry->fwdStrategy->countNexthops(fibEntry->fwdStrategy);
}
const NumberSet *fibEntry_GetNexthops(const FibEntry *fibEntry) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
return fibEntry->fwdStrategy->returnNexthops(fibEntry->fwdStrategy);
}
const NumberSet *fibEntry_GetNexthopsFromForwardingStrategy(
const FibEntry *fibEntry, const Message *interestMessage) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
return fibEntry->fwdStrategy->lookupNexthop(fibEntry->fwdStrategy,
interestMessage);
}
void fibEntry_ReceiveObjectMessage(const FibEntry *fibEntry,
const NumberSet *egressId,
const Message *objectMessage, Ticks rtt) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
fibEntry->fwdStrategy->receiveObject(fibEntry->fwdStrategy, egressId,
objectMessage, rtt);
}
void fibEntry_OnTimeout(const FibEntry *fibEntry, const NumberSet *egressId) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
fibEntry->fwdStrategy->onTimeout(fibEntry->fwdStrategy, egressId);
}
Name *fibEntry_GetPrefix(const FibEntry *fibEntry) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
return fibEntry->name;
// return metisName_Acquire(fibEntry->name);
}
strategy_type fibEntry_GetFwdStrategyType(const FibEntry *fibEntry) {
return fibEntry->fwdStrategy->getStrategy(fibEntry->fwdStrategy);
}
StrategyImpl *fibEntry_GetFwdStrategy(const FibEntry *fibEntry) {
return fibEntry->fwdStrategy;
}
#ifdef WITH_MAPME
void fibEntry_AddNexthopByConnectionId(FibEntry *fibEntry,
unsigned connectionId) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
fibEntry->fwdStrategy->addNexthop(fibEntry->fwdStrategy, connectionId);
}
void *fibEntry_getUserData(const FibEntry *fibEntry) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
return fibEntry->userData;
}
void fibEntry_setUserData(FibEntry *fibEntry, const void *userData,
void (*userDataRelease)(void **)) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
fibEntry->userData = (void *)userData;
fibEntry->userDataRelease = userDataRelease;
}
#endif /* WITH_MAPME */
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