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/*
* Copyright (c) 2016-2019 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 __included_tcp_timer_h__
#define __included_tcp_timer_h__
#include <vnet/tcp/tcp_types.h>
always_inline void
tcp_timer_set (tcp_timer_wheel_t * tw, tcp_connection_t * tc, u8 timer_id,
u32 interval)
{
ASSERT (tc->c_thread_index == vlib_get_thread_index ());
ASSERT (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID);
tc->timers[timer_id] = tw_timer_start_16t_2w_512sl (tw, tc->c_c_index,
timer_id, interval);
}
always_inline void
tcp_timer_reset (tcp_timer_wheel_t * tw, tcp_connection_t * tc, u8 timer_id)
{
ASSERT (tc->c_thread_index == vlib_get_thread_index ());
if (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID)
return;
tw_timer_stop_16t_2w_512sl (tw, tc->timers[timer_id]);
tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID;
}
always_inline void
tcp_timer_update (tcp_timer_wheel_t * tw, tcp_connection_t * tc, u8 timer_id,
u32 interval)
{
ASSERT (tc->c_thread_index == vlib_get_thread_index ());
if (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID)
tw_timer_update_16t_2w_512sl (tw, tc->timers[timer_id], interval);
else
tc->timers[timer_id] = tw_timer_start_16t_2w_512sl (tw, tc->c_c_index,
timer_id, interval);
}
always_inline void
tcp_retransmit_timer_set (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
{
ASSERT (tc->snd_una != tc->snd_una_max);
tcp_timer_set (tw, tc, TCP_TIMER_RETRANSMIT,
clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
}
always_inline void
tcp_retransmit_timer_reset (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
{
tcp_timer_reset (tw, tc, TCP_TIMER_RETRANSMIT);
}
always_inline void
tcp_retransmit_timer_force_update (tcp_timer_wheel_t * tw,
tcp_connection_t * tc)
{
tcp_timer_update (tw, tc, TCP_TIMER_RETRANSMIT,
clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
}
always_inline void
tcp_persist_timer_set (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
{
/* Reuse RTO. It's backed off in handler */
tcp_timer_set (tw, tc, TCP_TIMER_PERSIST,
clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
}
always_inline void
tcp_persist_timer_update (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
{
u32 interval;
if (seq_leq (tc->snd_una, tc->snd_congestion + tc->burst_acked))
interval = 1;
else
interval = clib_max (tc->rto * TCP_TO_TIMER_TICK, 1);
tcp_timer_update (tw, tc, TCP_TIMER_PERSIST, interval);
}
always_inline void
tcp_persist_timer_reset (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
{
tcp_timer_reset (tw, tc, TCP_TIMER_PERSIST);
}
always_inline void
tcp_retransmit_timer_update (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
{
if (tc->snd_una == tc->snd_nxt)
{
tcp_retransmit_timer_reset (tw, tc);
if (tc->snd_wnd < tc->snd_mss)
tcp_persist_timer_update (tw, tc);
}
else
tcp_timer_update (tw, tc, TCP_TIMER_RETRANSMIT,
clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
}
always_inline u8
tcp_timer_is_active (tcp_connection_t * tc, tcp_timers_e timer)
{
return tc->timers[timer] != TCP_TIMER_HANDLE_INVALID;
}
#endif /* __included_tcp_timer_h__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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