diff options
Diffstat (limited to 'newlib/libc/sys/linux/include/netns/spp_timer.h')
| -rw-r--r-- | newlib/libc/sys/linux/include/netns/spp_timer.h | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/newlib/libc/sys/linux/include/netns/spp_timer.h b/newlib/libc/sys/linux/include/netns/spp_timer.h deleted file mode 100644 index e28ecad7f..000000000 --- a/newlib/libc/sys/linux/include/netns/spp_timer.h +++ /dev/null @@ -1,128 +0,0 @@ -/* - * Copyright (c) 1982, 1986, 1988, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)spp_timer.h 8.1 (Berkeley) 6/10/93 - * $FreeBSD: src/sys/netns/spp_timer.h,v 1.9 1999/12/29 04:46:20 peter Exp $ - */ - -#ifndef _NETNS_SPP_TIMER_H_ -#define _NETNS_SPP_TIMER_H_ - -/* - * Definitions of the SPP timers. These timers are counted - * down PR_SLOWHZ times a second. - */ -#define SPPT_NTIMERS 4 - -#define SPPT_REXMT 0 /* retransmit */ -#define SPPT_PERSIST 1 /* retransmit persistance */ -#define SPPT_KEEP 2 /* keep alive */ -#define SPPT_2MSL 3 /* 2*msl quiet time timer */ - -/* - * The SPPT_REXMT timer is used to force retransmissions. - * The SPP has the SPPT_REXMT timer set whenever segments - * have been sent for which ACKs are expected but not yet - * received. If an ACK is received which advances tp->snd_una, - * then the retransmit timer is cleared (if there are no more - * outstanding segments) or reset to the base value (if there - * are more ACKs expected). Whenever the retransmit timer goes off, - * we retransmit one unacknowledged segment, and do a backoff - * on the retransmit timer. - * - * The SPPT_PERSIST timer is used to keep window size information - * flowing even if the window goes shut. If all previous transmissions - * have been acknowledged (so that there are no retransmissions in progress), - * and the window is too small to bother sending anything, then we start - * the SPPT_PERSIST timer. When it expires, if the window is nonzero, - * we go to transmit state. Otherwise, at intervals send a single byte - * into the peer's window to force him to update our window information. - * We do this at most as often as SPPT_PERSMIN time intervals, - * but no more frequently than the current estimate of round-trip - * packet time. The SPPT_PERSIST timer is cleared whenever we receive - * a window update from the peer. - * - * The SPPT_KEEP timer is used to keep connections alive. If an - * connection is idle (no segments received) for SPPTV_KEEP amount of time, - * but not yet established, then we drop the connection. If the connection - * is established, then we force the peer to send us a segment by sending: - * <SEQ=SND.UNA-1><ACK=RCV.NXT><CTL=ACK> - * This segment is (deliberately) outside the window, and should elicit - * an ack segment in response from the peer. If, despite the SPPT_KEEP - * initiated segments we cannot elicit a response from a peer in SPPT_MAXIDLE - * amount of time, then we drop the connection. - */ - -#define SPP_TTL 30 /* default time to live for SPP segs */ -/* - * Time constants. - */ -#define SPPTV_MSL ( 15*PR_SLOWHZ) /* max seg lifetime */ -#define SPPTV_SRTTBASE 0 /* base roundtrip time; - if 0, no idea yet */ -#define SPPTV_SRTTDFLT ( 3*PR_SLOWHZ) /* assumed RTT if no info */ - -#define SPPTV_PERSMIN ( 5*PR_SLOWHZ) /* retransmit persistance */ -#define SPPTV_PERSMAX ( 60*PR_SLOWHZ) /* maximum persist interval */ - -#define SPPTV_KEEP ( 75*PR_SLOWHZ) /* keep alive - 75 secs */ -#define SPPTV_MAXIDLE ( 8*SPPTV_KEEP) /* maximum allowable idle - time before drop conn */ - -#define SPPTV_MIN ( 1*PR_SLOWHZ) /* minimum allowable value */ -#define SPPTV_REXMTMAX ( 64*PR_SLOWHZ) /* max allowable REXMT value */ - -#define SPP_LINGERTIME 120 /* linger at most 2 minutes */ - -#define SPP_MAXRXTSHIFT 12 /* maximum retransmits */ - -#ifdef SPPTIMERS -char *spptimers[] = - { "REXMT", "PERSIST", "KEEP", "2MSL" }; -#endif - -/* - * Force a time value to be in a certain range. - */ -#define SPPT_RANGESET(tv, value, tvmin, tvmax) { \ - (tv) = (value); \ - if ((tv) < (tvmin)) \ - (tv) = (tvmin); \ - else if ((tv) > (tvmax)) \ - (tv) = (tvmax); \ -} - -#ifdef _KERNEL -extern int spp_backoff[]; -#endif - -#endif |