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/*
* Copyright (c) 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.
*/
#include "host_stack.h"
#include "inlines.h"
#define WINDOW_SIZE 200
typedef struct hicn_hs_cbr_proto_data_
{
u64 next_seq_number;
u16 window_size;
u16 in_flight_interests;
} hicn_hs_cbr_proto_data_t;
#define proto_data(ctx) ((hicn_hs_cbr_proto_data_t *)(ctx->hs_proto_data))
static void
reset_protocol(hicn_hs_cbr_proto_data_t *proto_data)
{
proto_data->in_flight_interests = 0;
proto_data->window_size = WINDOW_SIZE;
proto_data->next_seq_number = 0;
}
static void
schedule_next_interests(hicn_hs_ctx_t *ctx)
{
hicn_hs_cbr_proto_data_t *data = proto_data(ctx);
u32 scheduled_interests = 0;
if (data->in_flight_interests < data->window_size)
scheduled_interests = hicn_hs_send_interests(ctx, data->next_seq_number,
data->window_size - data->in_flight_interests);
data->in_flight_interests += scheduled_interests;
data->next_seq_number += scheduled_interests;
}
u32 cbr_proto_init(hicn_hs_ctx_t *ctx)
{
if (ctx->running)
return -1;
hicn_hs_cbr_proto_data_t *data = proto_data(ctx);
reset_protocol(data);
schedule_next_interests(ctx);
ctx->running = 1;
return 0;
}
u32 cbr_proto_on_data(hicn_hs_ctx_t *ctx, u16 n_data)
{
hicn_hs_cbr_proto_data_t *data = proto_data(ctx);
data->in_flight_interests -= n_data;
schedule_next_interests(ctx);
return 0;
}
u32 cbr_proto_on_interest(hicn_hs_ctx_t *ctx)
{
return 0;
}
u32 cbr_proto_interest_timeout(hicn_hs_ctx_t *ctx)
{
return 0;
}
u32 cbr_proto_event(hicn_hs_ctx_t *ctx, hicn_hs_proto_event_t event)
{
return 0;
}
hicn_hs_proto_t cbr_proto = {
.init = cbr_proto_init,
.rcv_data = cbr_proto_on_data,
.rcv_interest = cbr_proto_on_interest,
.on_interest_timeout = cbr_proto_interest_timeout,
.event = cbr_proto_event,
.options = {
.is_stream = 1}};
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