2 * Copyright (c) 2016-2019 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #ifndef __included_tcp_timer_h__
16 #define __included_tcp_timer_h__
18 #include <vnet/tcp/tcp_types.h>
21 tcp_timer_set (tcp_timer_wheel_t * tw, tcp_connection_t * tc, u8 timer_id,
24 ASSERT (tc->c_thread_index == vlib_get_thread_index ());
25 ASSERT (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID);
26 tc->timers[timer_id] = tw_timer_start_16t_2w_512sl (tw, tc->c_c_index,
31 tcp_timer_reset (tcp_timer_wheel_t * tw, tcp_connection_t * tc, u8 timer_id)
33 ASSERT (tc->c_thread_index == vlib_get_thread_index ());
34 if (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID)
37 tw_timer_stop_16t_2w_512sl (tw, tc->timers[timer_id]);
38 tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID;
42 tcp_timer_update (tcp_timer_wheel_t * tw, tcp_connection_t * tc, u8 timer_id,
45 ASSERT (tc->c_thread_index == vlib_get_thread_index ());
46 if (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID)
47 tw_timer_update_16t_2w_512sl (tw, tc->timers[timer_id], interval);
49 tc->timers[timer_id] = tw_timer_start_16t_2w_512sl (tw, tc->c_c_index,
54 tcp_retransmit_timer_set (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
56 ASSERT (tc->snd_una != tc->snd_una_max);
57 tcp_timer_set (tw, tc, TCP_TIMER_RETRANSMIT,
58 clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
62 tcp_retransmit_timer_reset (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
64 tcp_timer_reset (tw, tc, TCP_TIMER_RETRANSMIT);
68 tcp_retransmit_timer_force_update (tcp_timer_wheel_t * tw,
69 tcp_connection_t * tc)
71 tcp_timer_update (tw, tc, TCP_TIMER_RETRANSMIT,
72 clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
76 tcp_persist_timer_set (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
78 /* Reuse RTO. It's backed off in handler */
79 tcp_timer_set (tw, tc, TCP_TIMER_PERSIST,
80 clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
84 tcp_persist_timer_update (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
88 if (seq_leq (tc->snd_una, tc->snd_congestion + tc->burst_acked))
91 interval = clib_max (tc->rto * TCP_TO_TIMER_TICK, 1);
93 tcp_timer_update (tw, tc, TCP_TIMER_PERSIST, interval);
97 tcp_persist_timer_reset (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
99 tcp_timer_reset (tw, tc, TCP_TIMER_PERSIST);
103 tcp_retransmit_timer_update (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
105 if (tc->snd_una == tc->snd_nxt)
107 tcp_retransmit_timer_reset (tw, tc);
108 if (tc->snd_wnd < tc->snd_mss)
109 tcp_persist_timer_update (tw, tc);
112 tcp_timer_update (tw, tc, TCP_TIMER_RETRANSMIT,
113 clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
117 tcp_timer_is_active (tcp_connection_t * tc, tcp_timers_e timer)
119 return tc->timers[timer] != TCP_TIMER_HANDLE_INVALID;
122 #endif /* __included_tcp_timer_h__ */
125 * fd.io coding-style-patch-verification: ON
128 * eval: (c-set-style "gnu")