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Diffstat (limited to 'hicn-plugin/src/strategy.h')
-rw-r--r-- | hicn-plugin/src/strategy.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/hicn-plugin/src/strategy.h b/hicn-plugin/src/strategy.h new file mode 100644 index 000000000..d949f38a4 --- /dev/null +++ b/hicn-plugin/src/strategy.h @@ -0,0 +1,99 @@ +/* + * Copyright (c) 2017-2020 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. + */ + +#ifndef __HICN_STRATEGY__ +#define __HICN_STRATEGY__ + +#include "hicn.h" +#include "hashtb.h" +#include "mgmt.h" +#include "faces/face.h" + +/** + * @file strategy.h + * + * A strategy is defined as a dpo and a set of function (vft) that will be called + * during the packet processing. A strategy is associated to an entry in the fib by + * assigning the corresponding dpo to the fib entry. The dpo points to a hICN dpo + * context (ctx) which contains the information needed by the strategy to compute + * the next hop. Each strategy hash its own dpo type, which means that the dpo_type + * uniquely identifies a strategy and its vft. The strategy node will use the dpo_type + * to retrieve the corresponding vft. + * Here we provide: + * - a template for the callbacks to implement in order to create a new strategy + * (hicn_fwd_strategy_t) + * - a default implementation for the strategy node which will call the strategy + * functions while processing the interest packets + */ + +/* Trace context struct */ +typedef struct +{ + u32 next_index; + u32 sw_if_index; + u8 pkt_type; + dpo_type_t dpo_type; +} hicn_strategy_trace_t; + +typedef struct hicn_strategy_vft_s +{ + void (*hicn_receive_data) (index_t dpo_idx, int nh_idx); + void (*hicn_on_interest_timeout) (index_t dpo_idx); + void (*hicn_add_interest) (index_t dpo_idx, hicn_hash_entry_t * pit_entry); + u32 (*hicn_select_next_hop) (index_t dpo_idx, int *nh_idx, + hicn_face_id_t* outface); + u8 *(*hicn_format_strategy_trace) (u8 *, hicn_strategy_trace_t *); + u8 *(*hicn_format_strategy) (u8 * s, va_list * ap); + /**< Format an hICN dpo*/ +} hicn_strategy_vft_t; + +typedef enum +{ + HICN_STRATEGY_NEXT_INTEREST_HITPIT, + HICN_STRATEGY_NEXT_INTEREST_HITCS, + HICN_STRATEGY_NEXT_INTEREST_FACE4, + HICN_STRATEGY_NEXT_INTEREST_FACE6, + HICN_STRATEGY_NEXT_ERROR_DROP, + HICN_STRATEGY_N_NEXT, +} hicn_strategy_next_t; + +const static char *const hicn_ip6_nodes[] = +{ + "hicn6-iface-input", // this is the name you give your node in VLIB_REGISTER_NODE + NULL, +}; + +const static char *const hicn_ip4_nodes[] = +{ + "hicn4-iface-input", // this is the name you give your node in VLIB_REGISTER_NODE + NULL, +}; + +const static char *const *const hicn_nodes_strategy[DPO_PROTO_NUM] = +{ + [DPO_PROTO_IP6] = hicn_ip6_nodes, + [DPO_PROTO_IP4] = hicn_ip4_nodes, +}; + + +extern vlib_node_registration_t hicn_strategy_node; + +#endif /* //__HICN_STRATEGY__ */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: eval: (c-set-style "gnu") End: + */ |