+++ /dev/null
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*-
- * Copyright (c) 1991, 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.
- *
- * @(#)tp_pcb.h 8.1 (Berkeley) 6/10/93
- */
-
-/***********************************************************
- Copyright IBM Corporation 1987
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of IBM not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-
-******************************************************************/
-
-/*
- * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
- */
-/*
- * ARGO TP
- *
- *
- * This file defines the transport protocol control block (tpcb).
- * and a bunch of #define values that are used in the tpcb.
- */
-
-#ifndef __TP_PCB__
-#define __TP_PCB__
-
-#include <netiso/tp_param.h>
-#include <netiso/tp_timer.h>
-#include <netiso/tp_user.h>
-#ifndef sblock
-#include <sys/socketvar.h>
-#endif /* sblock */
-
-/* NOTE: the code depends on REF_CLOSED > REF_OPEN > the rest, and
- * on REF_FREE being zero
- *
- * Possible improvement:
- * think about merging the tp_ref w/ the tpcb and doing a search
- * through the tpcb list, from tpb. This would slow down lookup
- * during data transfer
- * It would be a little nicer also to have something based on the
- * clock (like top n bits of the reference is part of the clock, to
- * minimize the likelihood of reuse after a crash)
- * also, need to keep the timer servicing part to a minimum (although
- * the cost of this is probably independent of whether the timers are
- * in the pcb or in an array..
- * Last, would have to make the number of timers a function of the amount of
- * mbufs available, plus some for the frozen references.
- *
- * Possible improvement:
- * Might not need the ref_state stuff either...
- * REF_FREE could correspond to tp_state == CLOSED or nonexistend tpcb,
- * REF_OPEN to tp_state anywhere from AK_WAIT or CR_SENT to CLOSING
- * REF_OPENING could correspond to LISTENING, because that's the
- * way it's used, not because the correspondence is exact.
- * REF_CLOSED could correspond to REFWAIT
- */
-#define REF_FROZEN 3 /* has ref timer only */
-#define REF_OPEN 2 /* has timers, possibly active */
-#define REF_OPENING 1 /* in use (has a pcb) but no timers */
-#define REF_FREE 0 /* free to reallocate */
-
-#define TM_NTIMERS 6
-
-struct tp_ref {
- struct tp_pcb *tpr_pcb; /* back ptr to PCB */
-};
-
-/* PER system stuff (one static structure instead of a bunch of names) */
-struct tp_refinfo {
- struct tp_ref *tpr_base;
- int tpr_size;
- int tpr_maxopen;
- int tpr_numopen;
-};
-
-struct nl_protosw {
- int nlp_afamily; /* address family */
- int (*nlp_putnetaddr)(); /* puts addresses in nl pcb */
- int (*nlp_getnetaddr)(); /* gets addresses from nl pcb */
- int (*nlp_cmpnetaddr)(); /* compares address in pcb with sockaddr */
- int (*nlp_putsufx)(); /* puts transport suffixes in nl pcb */
- int (*nlp_getsufx)(); /* gets transport suffixes from nl pcb */
- int (*nlp_recycle_suffix)();/* clears suffix from nl pcb */
- int (*nlp_mtu)(); /* figures out mtu based on nl used */
- int (*nlp_pcbbind)(); /* bind to pcb for net level */
- int (*nlp_pcbconn)(); /* connect for net level */
- int (*nlp_pcbdisc)(); /* disconnect net level */
- int (*nlp_pcbdetach)(); /* detach net level pcb */
- int (*nlp_pcballoc)(); /* allocate a net level pcb */
- int (*nlp_output)(); /* prepare a packet to give to nl */
- int (*nlp_dgoutput)(); /* prepare a packet to give to nl */
- int (*nlp_ctloutput)(); /* hook for network set/get options */
- caddr_t nlp_pcblist; /* list of xx_pcb's for connections */
-};
-
-
-struct tp_pcb {
- struct tp_pcb *tp_next;
- struct tp_pcb *tp_prev;
- struct tp_pcb *tp_nextlisten; /* chain all listeners */
- struct socket *tp_sock; /* back ptr */
- u_short tp_state; /* state of fsm */
- short tp_retrans; /* # times can still retrans */
- caddr_t tp_npcb; /* to lower layer pcb */
- struct nl_protosw *tp_nlproto; /* lower-layer dependent routines */
- struct rtentry **tp_routep; /* obtain mtu; inside npcb */
-
-
- RefNum tp_lref; /* local reference */
- RefNum tp_fref; /* foreign reference */
-
- u_int tp_seqmask; /* mask for seq space */
- u_int tp_seqbit; /* bit for seq number wraparound */
- u_int tp_seqhalf; /* half the seq space */
-
- struct mbuf *tp_ucddata; /* user connect/disconnect data */
-
- /* credit & sequencing info for SENDING */
- u_short tp_fcredit; /* current remote credit in # packets */
- u_short tp_maxfcredit; /* max remote credit in # packets */
- u_short tp_dupacks; /* intuit packet loss before rxt timo */
- u_long tp_cong_win; /* congestion window in bytes.
- * see profuse comments in TCP code
- */
- u_long tp_ssthresh; /* cong_win threshold for slow start
- * exponential to linear switch
- */
- SeqNum tp_snduna; /* seq # of lowest unacked DT */
- SeqNum tp_sndnew; /* seq # of lowest unsent DT */
- SeqNum tp_sndnum; /* next seq # to be assigned */
- SeqNum tp_sndnxt; /* what to do next; poss. rxt */
- struct mbuf *tp_sndnxt_m; /* packet corres. to sndnxt*/
- int tp_Nwindow; /* for perf. measurement */
-
- /* credit & sequencing info for RECEIVING */
- SeqNum tp_rcvnxt; /* next DT seq # expect to recv */
- SeqNum tp_sent_lcdt; /* cdt according to last ack sent */
- SeqNum tp_sent_uwe; /* uwe according to last ack sent */
- SeqNum tp_sent_rcvnxt; /* rcvnxt according to last ack sent
- * needed for perf measurements only
- */
- u_short tp_lcredit; /* current local credit in # packets */
- u_short tp_maxlcredit; /* needed for reassembly queue */
- struct mbuf **tp_rsyq; /* unacked stuff recvd out of order */
- int tp_rsycnt; /* number of packets "" "" "" "" */
- u_long tp_rhiwat; /* remember original RCVBUF size */
-
- /* receiver congestion state stuff ... */
- u_int tp_win_recv;
-
- /* receive window as a scaled int (8 bit fraction part) */
-
- struct cong_sample {
- ushort cs_size; /* current window size */
- ushort cs_received; /* PDUs received in this sample */
- ushort cs_ce_set; /* PDUs received in this sample with CE bit set */
- } tp_cong_sample;
-
-
- /* parameters per-connection controllable by user */
- struct tp_conn_param _tp_param;
-
-#define tp_Nretrans _tp_param.p_Nretrans
-#define tp_dr_ticks _tp_param.p_dr_ticks
-#define tp_cc_ticks _tp_param.p_cc_ticks
-#define tp_dt_ticks _tp_param.p_dt_ticks
-#define tp_xpd_ticks _tp_param.p_x_ticks
-#define tp_cr_ticks _tp_param.p_cr_ticks
-#define tp_keepalive_ticks _tp_param.p_keepalive_ticks
-#define tp_sendack_ticks _tp_param.p_sendack_ticks
-#define tp_refer_ticks _tp_param.p_ref_ticks
-#define tp_inact_ticks _tp_param.p_inact_ticks
-#define tp_xtd_format _tp_param.p_xtd_format
-#define tp_xpd_service _tp_param.p_xpd_service
-#define tp_ack_strat _tp_param.p_ack_strat
-#define tp_rx_strat _tp_param.p_rx_strat
-#define tp_use_checksum _tp_param.p_use_checksum
-#define tp_use_efc _tp_param.p_use_efc
-#define tp_use_nxpd _tp_param.p_use_nxpd
-#define tp_use_rcc _tp_param.p_use_rcc
-#define tp_tpdusize _tp_param.p_tpdusize
-#define tp_class _tp_param.p_class
-#define tp_winsize _tp_param.p_winsize
-#define tp_no_disc_indications _tp_param.p_no_disc_indications
-#define tp_dont_change_params _tp_param.p_dont_change_params
-#define tp_netservice _tp_param.p_netservice
-#define tp_version _tp_param.p_version
-#define tp_ptpdusize _tp_param.p_ptpdusize
-
- int tp_l_tpdusize;
- /* whereas tp_tpdusize is log2(the negotiated max size)
- * l_tpdusize is the size we'll use when sending, in # chars
- */
-
- int tp_rtv; /* max round-trip time variance */
- int tp_rtt; /* smoothed round-trip time */
- SeqNum tp_rttseq; /* packet being timed */
- int tp_rttemit; /* when emitted, in ticks */
- int tp_idle; /* last activity, in ticks */
- short tp_rxtcur; /* current retransmit value */
- short tp_rxtshift; /* log(2) of rexmt exp. backoff */
- u_char tp_cebit_off; /* real DEC bit algorithms not in use */
- u_char tp_oktonagle; /* Last unsent pckt may be append to */
- u_char tp_flags; /* values: */
-#define TPF_NLQOS_PDN TPFLAG_NLQOS_PDN
-#define TPF_PEER_ON_SAMENET TPFLAG_PEER_ON_SAMENET
-#define TPF_GENERAL_ADDR TPFLAG_GENERAL_ADDR
-#define TPF_DELACK 0x8
-#define TPF_ACKNOW 0x10
-
-#define PEER_IS_LOCAL(t) (((t)->tp_flags & TPF_PEER_ON_SAME_NET) != 0)
-#define USES_PDN(t) (((t)->tp_flags & TPF_NLQOS_PDN) != 0)
-
-
- unsigned
- tp_sendfcc:1, /* shall next ack include FCC parameter? */
- tp_trace:1, /* is this pcb being traced? (not used yet) */
- tp_perf_on:1, /* 0/1 -> performance measuring on */
- tp_reneged:1, /* have we reneged on cdt since last ack? */
- tp_decbit:3, /* dec bit was set, we're in reneg mode */
- tp_notdetached:1; /* Call tp_detach before freeing XXXXXXX */
-
-#ifdef TP_PERF_MEAS
- /* performance stats - see tp_stat.h */
- struct tp_pmeas *tp_p_meas;
- struct mbuf *tp_p_mbuf;
-#endif /* TP_PERF_MEAS */
-
- /* addressing */
- u_short tp_domain; /* domain (INET, ISO) */
- /* for compatibility with the *old* way and with INET, be sure that
- * that lsuffix and fsuffix are aligned to a short addr.
- * having them follow the u_short *suffixlen should suffice (choke)
- */
- u_short tp_fsuffixlen; /* foreign suffix */
- char tp_fsuffix[MAX_TSAP_SEL_LEN];
- u_short tp_lsuffixlen; /* local suffix */
- char tp_lsuffix[MAX_TSAP_SEL_LEN];
-#define SHORT_LSUFXP(tpcb) ((short *)((tpcb)->tp_lsuffix))
-#define SHORT_FSUFXP(tpcb) ((short *)((tpcb)->tp_fsuffix))
-
- /* Timer stuff */
- u_char tp_vers; /* protocol version */
- u_char tp_peer_acktime; /* used for DT retrans time */
- u_char tp_refstate; /* values REF_FROZEN, etc. above */
- struct tp_pcb *tp_fasttimeo; /* limit pcbs to examine */
- u_int tp_timer[TM_NTIMERS]; /* C timers */
-
- struct sockbuf tp_Xsnd; /* for expedited data */
-/* struct sockbuf tp_Xrcv; /* for expedited data */
-#define tp_Xrcv tp_sock->so_rcv
- SeqNum tp_Xsndnxt; /* next XPD seq # to send */
- SeqNum tp_Xuna; /* seq # of unacked XPD */
- SeqNum tp_Xrcvnxt; /* next XPD seq # expect to recv */
-
- /* AK subsequencing */
- u_short tp_s_subseq; /* next subseq to send */
- u_short tp_r_subseq; /* highest recv subseq */
-
-};
-
-u_int tp_start_win;
-
-#define ROUND(scaled_int) (((scaled_int) >> 8) + (((scaled_int) & 0x80) ? 1:0))
-
-/* to round off a scaled int with an 8 bit fraction part */
-
-#define CONG_INIT_SAMPLE(pcb) \
- pcb->tp_cong_sample.cs_received = \
- pcb->tp_cong_sample.cs_ce_set = 0; \
- pcb->tp_cong_sample.cs_size = max(pcb->tp_lcredit, 1) << 1;
-
-#define CONG_UPDATE_SAMPLE(pcb, ce_bit) \
- pcb->tp_cong_sample.cs_received++; \
- if (ce_bit) { \
- pcb->tp_cong_sample.cs_ce_set++; \
- } \
- if (pcb->tp_cong_sample.cs_size <= pcb->tp_cong_sample.cs_received) { \
- if ((pcb->tp_cong_sample.cs_ce_set << 1) >= \
- pcb->tp_cong_sample.cs_size ) { \
- pcb->tp_win_recv -= pcb->tp_win_recv >> 3; /* multiply by .875 */ \
- pcb->tp_win_recv = max(1 << 8, pcb->tp_win_recv); \
- } \
- else { \
- pcb->tp_win_recv += (1 << 8); /* add one to the scaled int */ \
- } \
- pcb->tp_lcredit = ROUND(pcb->tp_win_recv); \
- CONG_INIT_SAMPLE(pcb); \
- }
-
-#ifdef KERNEL
-extern struct tp_refinfo tp_refinfo;
-extern struct timeval time;
-extern struct tp_ref *tp_ref;
-extern struct tp_param tp_param;
-extern struct nl_protosw nl_protosw[];
-extern struct tp_pcb *tp_listeners;
-extern struct tp_pcb *tp_ftimeolist;
-#endif
-
-#define sototpcb(so) ((struct tp_pcb *)(so->so_pcb))
-#define sototpref(so) ((sototpcb(so)->tp_ref))
-#define tpcbtoso(tp) ((struct socket *)((tp)->tp_sock))
-#define tpcbtoref(tp) ((struct tp_ref *)((tp)->tp_ref))
-
-#endif /* __TP_PCB__ */
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