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_thread_is_valid (tcp_connection_t *tc)
23 return ((tc->c_thread_index == vlib_get_thread_index ()) ||
24 vlib_thread_is_main_w_barrier ());
28 tcp_timer_set (tcp_timer_wheel_t *tw, tcp_connection_t *tc, u8 timer_id,
31 ASSERT (tcp_timer_thread_is_valid (tc));
32 ASSERT (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID);
33 tc->timers[timer_id] = tw_timer_start_tcp_twsl (tw, tc->c_c_index,
38 tcp_timer_reset (tcp_timer_wheel_t * tw, tcp_connection_t * tc, u8 timer_id)
40 ASSERT (tcp_timer_thread_is_valid (tc));
41 tc->pending_timers &= ~(1 << timer_id);
42 if (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID)
45 tw_timer_stop_tcp_twsl (tw, tc->timers[timer_id]);
46 tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID;
50 tcp_timer_update (tcp_timer_wheel_t * tw, tcp_connection_t * tc, u8 timer_id,
53 ASSERT (tcp_timer_thread_is_valid (tc));
54 if (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID)
55 tw_timer_update_tcp_twsl (tw, tc->timers[timer_id], interval);
57 tc->timers[timer_id] = tw_timer_start_tcp_twsl (tw, tc->c_c_index,
62 tcp_timer_is_active (tcp_connection_t *tc, tcp_timers_e timer)
64 return tc->timers[timer] != TCP_TIMER_HANDLE_INVALID ||
65 (tc->pending_timers & (1 << timer));
69 tcp_retransmit_timer_set (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
71 ASSERT (tc->snd_una != tc->snd_nxt);
72 tcp_timer_set (tw, tc, TCP_TIMER_RETRANSMIT,
73 clib_max ((u32) tc->rto * TCP_TO_TIMER_TICK, 1));
77 tcp_retransmit_timer_reset (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
79 tcp_timer_reset (tw, tc, TCP_TIMER_RETRANSMIT);
83 tcp_persist_timer_set (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
85 /* Reuse RTO. It's backed off in handler */
86 tcp_timer_set (tw, tc, TCP_TIMER_PERSIST,
87 clib_max ((u32) tc->rto * TCP_TO_TIMER_TICK, 1));
91 tcp_persist_timer_reset (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
93 tcp_timer_reset (tw, tc, TCP_TIMER_PERSIST);
97 tcp_retransmit_timer_update (tcp_timer_wheel_t * tw, tcp_connection_t * tc)
99 if (tc->snd_una == tc->snd_nxt)
101 tcp_retransmit_timer_reset (tw, tc);
102 if (tc->snd_wnd < tc->snd_mss &&
103 !tcp_timer_is_active (tc, TCP_TIMER_PERSIST))
104 tcp_persist_timer_set (tw, tc);
107 tcp_timer_update (tw, tc, TCP_TIMER_RETRANSMIT,
108 clib_max ((u32) tc->rto * TCP_TO_TIMER_TICK, 1));
112 tcp_timer_expire_timers (tcp_timer_wheel_t * tw, f64 now)
114 tw_timer_expire_timers_tcp_twsl (tw, now);
117 void tcp_timer_initialize_wheel (tcp_timer_wheel_t * tw,
118 void (*expired_timer_cb) (u32 *), f64 now);
120 #endif /* __included_tcp_timer_h__ */
123 * fd.io coding-style-patch-verification: ON
126 * eval: (c-set-style "gnu")