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/*
* Copyright (c) 2017 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 <config.h>
#include <stdio.h>
#include <ccnx/forwarder/metis/processor/metis_FibEntry.h>
#include <ccnx/forwarder/metis/core/metis_NumberSet.h>
#include <ccnx/forwarder/metis/strategies/metis_StrategyImpl.h>
#include <ccnx/forwarder/metis/strategies/strategy_Rnd.h>
#include <ccnx/forwarder/metis/strategies/strategy_LoadBalancer.h>
#include <ccnx/forwarder/metis/strategies/strategy_RndSegment.h>
#include <ccnx/forwarder/metis/strategies/strategy_LoadBalancerWithPD.h>
#include <parc/algol/parc_Memory.h>
#include <LongBow/runtime.h>
struct metis_fib_entry {
MetisTlvName *name;
unsigned refcount;
MetisStrategyImpl *fwdStrategy;
};
MetisFibEntry *
metisFibEntry_Create(MetisTlvName *name, const char *fwdStrategy)
{
MetisFibEntry *fibEntry = parcMemory_AllocateAndClear(sizeof(MetisFibEntry));
assertNotNull(fibEntry, "parcMemory_AllocateAndClear(%zu) returned NULL", sizeof(MetisFibEntry));
fibEntry->name = metisTlvName_Acquire(name);
CCNxName *ccnxName = metisTlvName_ToCCNxName(name);
char *strname = ccnxName_ToString(ccnxName);
if (strcmp(fwdStrategy, FWD_STRATEGY_LOADBALANCER) == 0) {
printf("[Metis Forwarding Strategy] --- set \"laodbalancer\" for %s\n", strname);
fibEntry->fwdStrategy = strategyLoadBalancer_Create();
} else if (strcmp(fwdStrategy, FWD_STRATEGY_RANDOM_PER_DASH_SEGMENT) == 0) {
printf("[Metis Forwarding Strategy] --- set \"random_per_dash_segment\" for %s\n", strname);
fibEntry->fwdStrategy = strategyRndSegment_Create();
} else if (strcmp(fwdStrategy, FWD_STRATEGY_LOADBALANCER_WITH_DELAY) == 0) {
printf("[Metis Forwarding Strategy] --- set \"laodbalancer with dealy\" for %s\n", strname);
fibEntry->fwdStrategy = strategyLoadBalancerWithPD_Create();
} else {
//random is the defualt strategy
printf("[Metis Forwarding Strategy] --- set \"random\" for %s\n", strname);
fibEntry->fwdStrategy = strategyRnd_Create(); //the Random strategy is the default one
//other strategies can be set using the appropiate function
}
ccnxName_Release(&ccnxName);
parcMemory_Deallocate((void **) &strname);
fibEntry->refcount = 1;
return fibEntry;
}
MetisFibEntry *
metisFibEntry_Acquire(const MetisFibEntry *fibEntry)
{
assertNotNull(fibEntry, "Parameter fibEntry must be non-null");
MetisFibEntry *copy = (MetisFibEntry *) fibEntry;
copy->refcount++;
return copy;
}
void
metisFibEntry_Release(MetisFibEntry **fibEntryPtr)
{
MetisFibEntry *fibEntry = *fibEntryPtr;
assertTrue(fibEntry->refcount > 0, "Illegal state: refcount is 0");
fibEntry->refcount--;
if (fibEntry->refcount == 0) {
metisTlvName_Release(&fibEntry->name);
fibEntry->fwdStrategy->destroy(&(fibEntry->fwdStrategy));
parcMemory_Deallocate((void **) &fibEntry);
}
*fibEntryPtr = NULL;
}
void
metisFibEntry_SetStrategy(MetisFibEntry *fibEntry, const char *strategy)
{
MetisStrategyImpl *fwdStrategyImpl;
char *strname = ccnxName_ToString(metisTlvName_ToCCNxName(fibEntry->name));
if (strcmp(strategy, FWD_STRATEGY_LOADBALANCER) == 0) {
printf("[Metis Forwarding Strategy] --- change to \"laodbalancer\" for %s\n", strname);
fwdStrategyImpl = strategyLoadBalancer_Create();
} else if (strcmp(strategy, FWD_STRATEGY_RANDOM_PER_DASH_SEGMENT) == 0) {
printf("[Metis Forwarding Strategy] --- change to \"random_per_dash_segment\" for %s\n", strname);
fwdStrategyImpl = strategyRndSegment_Create();
} else if (strcmp(strategy, FWD_STRATEGY_LOADBALANCER_WITH_DELAY) == 0) {
printf("[Metis Forwarding Strategy] --- change to \"loadbalancer_with_delay\" for %s\n", strname);
fwdStrategyImpl = strategyLoadBalancerWithPD_Create();
} else {
//random is the defualt strategy
printf("[Metis Forwarding Strategy] --- change to \"random\" for %s\n", strname);
fwdStrategyImpl = strategyRnd_Create(); //the Random strategy is the default one
//other strategies can be set using the appropiate function
}
parcMemory_Deallocate((void **) &strname);
const MetisNumberSet *nexthops = metisFibEntry_GetNexthops(fibEntry);
unsigned size = metisFibEntry_NexthopCount(fibEntry);
for (unsigned i = 0; i < size; i++) {
CCNxName *ccnxName = metisTlvName_ToCCNxName(fibEntry->name);
CPIRouteEntry *cpiRouteEntry = cpiRouteEntry_Create(ccnxName, metisNumberSet_GetItem(nexthops, i), NULL, 0, 0, NULL, 0);
fwdStrategyImpl->addNexthop(fwdStrategyImpl, cpiRouteEntry);
cpiRouteEntry_Destroy(&cpiRouteEntry);
}
fibEntry->fwdStrategy->destroy(&(fibEntry->fwdStrategy));
fibEntry->fwdStrategy = fwdStrategyImpl;
}
void
metisFibEntry_AddNexthop(MetisFibEntry *fibEntry, CPIRouteEntry *route)
{
assertNotNull(fibEntry, "Parameter fibEntry must be non-null");
fibEntry->fwdStrategy->addNexthop(fibEntry->fwdStrategy, route);
}
void
metisFibEntry_RemoveNexthopByRoute(MetisFibEntry *fibEntry, CPIRouteEntry *route)
{
assertNotNull(fibEntry, "Parameter fibEntry must be non-null");
fibEntry->fwdStrategy->removeNexthop(fibEntry->fwdStrategy, route);
}
void
metisFibEntry_RemoveNexthopByConnectionId(MetisFibEntry *fibEntry, unsigned connectionId)
{
assertNotNull(fibEntry, "Parameter fibEntry must be non-null");
CCNxName *ccnxName = metisTlvName_ToCCNxName(fibEntry->name);
//this is a fake route, create only to deal with the strategyImpl interface
CPIRouteEntry *cpiRouteEntry = cpiRouteEntry_Create(ccnxName, connectionId, NULL, 0, 0, NULL, 1);
metisFibEntry_RemoveNexthopByRoute(fibEntry, cpiRouteEntry);
cpiRouteEntry_Destroy(&cpiRouteEntry);
}
size_t
metisFibEntry_NexthopCount(const MetisFibEntry *fibEntry)
{
assertNotNull(fibEntry, "Parameter fibEntry must be non-null");
return fibEntry->fwdStrategy->countNexthops(fibEntry->fwdStrategy);
}
const MetisNumberSet *
metisFibEntry_GetNexthops(const MetisFibEntry *fibEntry)
{
assertNotNull(fibEntry, "Parameter fibEntry must be non-null");
return fibEntry->fwdStrategy->returnNexthops(fibEntry->fwdStrategy);
}
const MetisNumberSet *
metisFibEntry_GetNexthopsFromForwardingStrategy(const MetisFibEntry *fibEntry, const MetisMessage *interestMessage)
{
assertNotNull(fibEntry, "Parameter fibEntry must be non-null");
return fibEntry->fwdStrategy->lookupNexthop(fibEntry->fwdStrategy, interestMessage);
}
void
metisFibEntry_ReceiveObjectMessage(const MetisFibEntry *fibEntry, const MetisNumberSet *egressId, const MetisMessage *objectMessage, MetisTicks rtt)
{
assertNotNull(fibEntry, "Parameter fibEntry must be non-null");
fibEntry->fwdStrategy->receiveObject(fibEntry->fwdStrategy, egressId, objectMessage, rtt);
}
void
metisFibEntry_OnTimeout(const MetisFibEntry *fibEntry, const MetisNumberSet *egressId)
{
assertNotNull(fibEntry, "Parameter fibEntry must be non-null");
fibEntry->fwdStrategy->onTimeout(fibEntry->fwdStrategy, egressId);
}
MetisTlvName *
metisFibEntry_GetPrefix(const MetisFibEntry *fibEntry)
{
assertNotNull(fibEntry, "Parameter fibEntry must be non-null");
return metisTlvName_Acquire(fibEntry->name);
}
const char *
metisFibEntry_GetFwdStrategyType(const MetisFibEntry *fibEntry)
{
return fibEntry->fwdStrategy->getStrategy(fibEntry->fwdStrategy);
}
MetisStrategyImpl *
metisFibEntry_GetFwdStrategy(const MetisFibEntry *fibEntry)
{
return fibEntry->fwdStrategy;
}
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