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Diffstat (limited to 'hicn-light/src/hicn/core/strategy_vft.h')
| -rw-r--r-- | hicn-light/src/hicn/core/strategy_vft.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/hicn-light/src/hicn/core/strategy_vft.h b/hicn-light/src/hicn/core/strategy_vft.h new file mode 100644 index 000000000..55e61db17 --- /dev/null +++ b/hicn-light/src/hicn/core/strategy_vft.h @@ -0,0 +1,124 @@ +/* + * Copyright (c) 2021-2022 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. + */ + +/** + * \file strategy_vft.h + * \brief hICN forwarding strategy VFT + */ +#ifndef HICNLIGHT_STRATEGY_VFT_H +#define HICNLIGHT_STRATEGY_VFT_H + +#include "msgbuf.h" + +#include "../strategies/best_path.h" +#include "../strategies/load_balancer.h" +#include "../strategies/random.h" +#include "../strategies/replication.h" + +typedef union { + strategy_load_balancer_options_t load_balancer; + strategy_random_options_t random; + strategy_replication_options_t replication; + strategy_bestpath_options_t bestpath; +} strategy_options_t; + +typedef struct { +#ifdef WITH_POLICY + int priority; +#endif /* WITH_POLICY */ + union { + strategy_load_balancer_nexthop_state_t load_balancer; + strategy_random_nexthop_state_t random; + strategy_replication_nexthop_state_t replication; + strategy_bestpath_nexthop_state_t bestpath; + }; +} strategy_nexthop_state_t; + +#define STRATEGY_NEXTHOP_STATE_EMPTY \ + { \ + 0, { \ + { 0 } \ + } \ + } + +typedef union { + strategy_load_balancer_state_t load_balancer; + strategy_random_state_t random; + strategy_replication_state_t replication; + strategy_bestpath_state_t bestpath; +} strategy_state_t; +// XXX This has to be merged with nexthops +// XXX How to avoid errors due to pool id reuse (eg on_data) ? + +/** + * @typedef strategy_ops_t + * @abstract Forwarding strategy implementation + * @constant receiveObject is called when we receive an object and have a + * measured round trip time. This allows a strategy to update its performance + * data. + * @constant lookupNexthop Find the set of nexthops to use for the Interest. + * May be empty, should not be NULL. Must be destroyed. + * @constant addNexthop Add a nexthop to the list of available nexthops with a + * routing protocol-specific cost. + * @constant destroy cleans up the strategy, freeing all memory and state. A + * strategy is reference counted, so the final destruction only happens after + * the last reference is released. + * @discussion <#Discussion#> + */ + +struct strategy_entry_s; +struct nexthops_s; + +typedef struct { + const char *name; + + int (*initialize)(struct strategy_entry_s *entry, const void *forwarder); + + int (*finalize)(struct strategy_entry_s *entry); + + struct nexthops_s *(*lookup_nexthops)(struct strategy_entry_s *entry, + struct nexthops_s *nexthops, + const msgbuf_t *msgbuf); + + int (*add_nexthop)(struct strategy_entry_s *strategy, + struct nexthops_s *nexthops, off_t offset); + + int (*remove_nexthop)(struct strategy_entry_s *entry, + struct nexthops_s *nexthops, off_t offset); + + int (*on_data)(struct strategy_entry_s *entry, struct nexthops_s *nexthops, + const struct nexthops_s *data_nexthops, const msgbuf_t *msgbuf, + Ticks pitEntryCreation, Ticks objReception); + + int (*on_timeout)(struct strategy_entry_s *entry, struct nexthops_s *nexthops, + const struct nexthops_s *timeout_nexthops); + +} strategy_ops_t; + +extern const strategy_ops_t *const strategy_vft[]; + +#define DECLARE_STRATEGY(NAME) \ + const strategy_ops_t strategy_##NAME = { \ + .name = #NAME, \ + .initialize = strategy_##NAME##_initialize, \ + .finalize = strategy_##NAME##_finalize, \ + .add_nexthop = strategy_##NAME##_add_nexthop, \ + .remove_nexthop = strategy_##NAME##_remove_nexthop, \ + .lookup_nexthops = strategy_##NAME##_lookup_nexthops, \ + .on_data = strategy_##NAME##_on_data, \ + .on_timeout = strategy_##NAME##_on_timeout, \ + } + +#endif /* HICNLIGHT_STRATEGY_VFT_H */ |