| tcp_timer.c (302408) | tcp_timer.c (330303) |
|---|---|
| 1/*- 2 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 16 unchanged lines hidden (view full) --- 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)tcp_timer.c 8.2 (Berkeley) 5/24/95 30 */ 31 32#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 16 unchanged lines hidden (view full) --- 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)tcp_timer.c 8.2 (Berkeley) 5/24/95 30 */ 31 32#include <sys/cdefs.h> |
| 33__FBSDID("$FreeBSD: stable/11/sys/netinet/tcp_timer.c 300042 2016-05-17 09:53:22Z rrs $"); | 33__FBSDID("$FreeBSD: stable/11/sys/netinet/tcp_timer.c 330303 2018-03-03 00:54:12Z jhb $"); |
| 34 35#include "opt_inet.h" 36#include "opt_inet6.h" 37#include "opt_tcpdebug.h" 38#include "opt_rss.h" 39 40#include <sys/param.h> 41#include <sys/kernel.h> --- 69 unchanged lines hidden (view full) --- 111 &tcp_rexmit_min, 0, sysctl_msec_to_ticks, "I", 112 "Minimum Retransmission Timeout"); 113 114int tcp_rexmit_slop; 115SYSCTL_PROC(_net_inet_tcp, OID_AUTO, rexmit_slop, CTLTYPE_INT|CTLFLAG_RW, 116 &tcp_rexmit_slop, 0, sysctl_msec_to_ticks, "I", 117 "Retransmission Timer Slop"); 118 | 34 35#include "opt_inet.h" 36#include "opt_inet6.h" 37#include "opt_tcpdebug.h" 38#include "opt_rss.h" 39 40#include <sys/param.h> 41#include <sys/kernel.h> --- 69 unchanged lines hidden (view full) --- 111 &tcp_rexmit_min, 0, sysctl_msec_to_ticks, "I", 112 "Minimum Retransmission Timeout"); 113 114int tcp_rexmit_slop; 115SYSCTL_PROC(_net_inet_tcp, OID_AUTO, rexmit_slop, CTLTYPE_INT|CTLFLAG_RW, 116 &tcp_rexmit_slop, 0, sysctl_msec_to_ticks, "I", 117 "Retransmission Timer Slop"); 118 |
| 119static int always_keepalive = 1; | 119int tcp_always_keepalive = 1; |
| 120SYSCTL_INT(_net_inet_tcp, OID_AUTO, always_keepalive, CTLFLAG_RW, | 120SYSCTL_INT(_net_inet_tcp, OID_AUTO, always_keepalive, CTLFLAG_RW, |
| 121 &always_keepalive , 0, "Assume SO_KEEPALIVE on all TCP connections"); | 121 &tcp_always_keepalive , 0, "Assume SO_KEEPALIVE on all TCP connections"); 122__strong_reference(tcp_always_keepalive, always_keepalive); |
| 122 123int tcp_fast_finwait2_recycle = 0; 124SYSCTL_INT(_net_inet_tcp, OID_AUTO, fast_finwait2_recycle, CTLFLAG_RW, 125 &tcp_fast_finwait2_recycle, 0, 126 "Recycle closed FIN_WAIT_2 connections faster"); 127 128int tcp_finwait2_timeout; 129SYSCTL_PROC(_net_inet_tcp, OID_AUTO, finwait2_timeout, CTLTYPE_INT|CTLFLAG_RW, --- 293 unchanged lines hidden (view full) --- 423 ("%s: tp %p keep callout should be running", __func__, tp)); 424 /* 425 * Keep-alive timer went off; send something 426 * or drop connection if idle for too long. 427 */ 428 TCPSTAT_INC(tcps_keeptimeo); 429 if (tp->t_state < TCPS_ESTABLISHED) 430 goto dropit; | 123 124int tcp_fast_finwait2_recycle = 0; 125SYSCTL_INT(_net_inet_tcp, OID_AUTO, fast_finwait2_recycle, CTLFLAG_RW, 126 &tcp_fast_finwait2_recycle, 0, 127 "Recycle closed FIN_WAIT_2 connections faster"); 128 129int tcp_finwait2_timeout; 130SYSCTL_PROC(_net_inet_tcp, OID_AUTO, finwait2_timeout, CTLTYPE_INT|CTLFLAG_RW, --- 293 unchanged lines hidden (view full) --- 424 ("%s: tp %p keep callout should be running", __func__, tp)); 425 /* 426 * Keep-alive timer went off; send something 427 * or drop connection if idle for too long. 428 */ 429 TCPSTAT_INC(tcps_keeptimeo); 430 if (tp->t_state < TCPS_ESTABLISHED) 431 goto dropit; |
| 431 if ((always_keepalive || inp->inp_socket->so_options & SO_KEEPALIVE) && | 432 if ((tcp_always_keepalive || 433 inp->inp_socket->so_options & SO_KEEPALIVE) && |
| 432 tp->t_state <= TCPS_CLOSING) { 433 if (ticks - tp->t_rcvtime >= TP_KEEPIDLE(tp) + TP_MAXIDLE(tp)) 434 goto dropit; 435 /* 436 * Send a packet designed to force a response 437 * if the peer is up and reachable: 438 * either an ACK if the connection is still alive, 439 * or an RST if the peer has closed the connection --- 567 unchanged lines hidden --- | 434 tp->t_state <= TCPS_CLOSING) { 435 if (ticks - tp->t_rcvtime >= TP_KEEPIDLE(tp) + TP_MAXIDLE(tp)) 436 goto dropit; 437 /* 438 * Send a packet designed to force a response 439 * if the peer is up and reachable: 440 * either an ACK if the connection is still alive, 441 * or an RST if the peer has closed the connection --- 567 unchanged lines hidden --- |