/*
 * 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.
 */

/*
 * Rate estimation
 */

#ifndef SRC_VNET_TCP_TCP_BT_H_
#define SRC_VNET_TCP_TCP_BT_H_

#include <vnet/tcp/tcp_types.h>

/**
 * Byte tracker initialize
 *
 * @param tc	connection for which the byte tracker should be allocated and
 * 		initialized
 */
void tcp_bt_init (tcp_connection_t * tc);
/**
 * Byte tracker cleanup
 *
 * @param tc	connection for which the byte tracker should be cleaned up
 */
void tcp_bt_cleanup (tcp_connection_t * tc);
/**
 * Flush byte tracker samples
 *
 * @param tc	tcp connection for which samples should be flushed
 */
void tcp_bt_flush_samples (tcp_connection_t * tc);
/**
 * Track a tcp tx burst
 *
 * @param tc	tcp connection
 */
void tcp_bt_track_tx (tcp_connection_t * tc, u32 len);
/**
 * Track a tcp retransmission
 *
 * @param tc	tcp connection
 * @param start	start sequence number
 * @param end	end sequence number
 */
void tcp_bt_track_rxt (tcp_connection_t * tc, u32 start, u32 end);
/**
 * Generate a delivery rate sample from recently acked bytes
 *
 * @param tc	tcp connection
 * @param rs	resulting rate sample
 */
void tcp_bt_sample_delivery_rate (tcp_connection_t * tc,
				  tcp_rate_sample_t * rs);
/**
 * Check if sample to be generated is app limited
 *
 * @param tc	tcp connection
 */
void tcp_bt_check_app_limited (tcp_connection_t * tc);
/**
 * Check if the byte tracker is in sane state
 *
 * Should be used only for testing
 *
 * @param bt	byte tracker
 */
int tcp_bt_is_sane (tcp_byte_tracker_t * bt);

format_function_t format_tcp_bt;

#endif /* SRC_VNET_TCP_TCP_BT_H_ */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */