248 lines
9.9 KiB
C
248 lines
9.9 KiB
C
/* $NetBSD: spp_var.h,v 1.12 2003/06/29 22:32:09 fvdl Exp $ */
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/*
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* Copyright (c) 1984, 1985, 1986, 1987, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)spp_var.h 8.1 (Berkeley) 6/10/93
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*/
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/*
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* Sp control block, one per connection
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*/
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struct sppcb {
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struct siqhead s_q; /* queue for out-of-order receipt */
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struct nspcb *s_nspcb; /* backpointer to internet pcb */
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u_char s_state;
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u_char s_flags;
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#define SF_ACKNOW 0x01 /* Ack peer immediately */
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#define SF_DELACK 0x02 /* Ack, but try to delay it */
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#define SF_HI 0x04 /* Show headers on input */
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#define SF_HO 0x08 /* Show headers on output */
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#define SF_PI 0x10 /* Packet (datagram) interface */
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#define SF_WIN 0x20 /* Window info changed */
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#define SF_RXT 0x40 /* Rxt info changed */
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#define SF_RVD 0x80 /* Calling from read usrreq routine */
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u_short s_mtu; /* Max packet size for this stream */
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/*
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* use sequence fields in headers to store sequence numbers for this
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* connection
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*/
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struct idp *s_idp;
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struct sphdr s_shdr; /* prototype header to transmit */
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#define s_cc s_shdr.sp_cc /* connection control (for EM bit) */
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#define s_dt s_shdr.sp_dt /* datastream type */
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#define s_sid s_shdr.sp_sid /* source connection identifier */
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#define s_did s_shdr.sp_did /* destination connection identifier */
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#define s_seq s_shdr.sp_seq /* sequence number */
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#define s_ack s_shdr.sp_ack /* acknowledge number */
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#define s_alo s_shdr.sp_alo /* allocation number */
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#define s_dport s_idp->idp_dna.x_port /* where we are sending */
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struct sphdr s_rhdr; /* last received header (in effect!)*/
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u_short s_rack; /* their acknowledge number */
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u_short s_ralo; /* their allocation number */
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u_short s_smax; /* highest packet # we have sent */
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u_short s_snxt; /* which packet to send next */
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/* congestion control */
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#define CUNIT 1024 /* scaling for ... */
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int s_cwnd; /* Congestion-controlled window */
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/* in packets * CUNIT */
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short s_swnd; /* == tcp snd_wnd, in packets */
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short s_smxw; /* == tcp max_sndwnd */
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/* difference of two spp_seq's can be
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no bigger than a short */
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u_short s_swl1; /* == tcp snd_wl1 */
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u_short s_swl2; /* == tcp snd_wl2 */
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int s_cwmx; /* max allowable cwnd */
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int s_ssthresh; /* s_cwnd size threshhold for
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* slow start exponential-to-
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* linear switch */
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/*
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* transmit timing stuff
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* srtt and rttvar are stored as fixed point, for convenience in smoothing.
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* srtt has 3 bits to the right of the binary point, rttvar has 2.
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*/
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short s_idle; /* time idle */
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short s_timer[SPPT_NTIMERS]; /* timers */
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short s_rxtshift; /* log(2) of rexmt exp. backoff */
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short s_rxtcur; /* current retransmit value */
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u_short s_rtseq; /* packet being timed */
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short s_rtt; /* timer for round trips */
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short s_srtt; /* averaged timer */
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short s_rttvar; /* variance in round trip time */
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char s_force; /* which timer expired */
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char s_dupacks; /* counter to intuit xmt loss */
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/* out of band data */
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char s_oobflags;
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#define SF_SOOB 0x08 /* sending out of band data */
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#define SF_IOOB 0x10 /* receiving out of band data */
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char s_iobc; /* input characters */
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/* debug stuff */
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u_short s_want; /* Last candidate for sending */
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char s_outx; /* exit taken from spp_output */
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char s_inx; /* exit taken from spp_input */
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u_short s_flags2; /* more flags for testing */
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#define SF_NEWCALL 0x100 /* for new_recvmsg */
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#define SO_NEWCALL 10 /* for new_recvmsg */
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};
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#define nstosppcb(np) ((struct sppcb *)(np)->nsp_pcb)
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#define sotosppcb(so) (nstosppcb(sotonspcb(so)))
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struct sppstat {
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long spps_connattempt; /* connections initiated */
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long spps_accepts; /* connections accepted */
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long spps_connects; /* connections established */
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long spps_drops; /* connections dropped */
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long spps_conndrops; /* embryonic connections dropped */
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long spps_closed; /* conn. closed (includes drops) */
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long spps_segstimed; /* segs where we tried to get rtt */
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long spps_rttupdated; /* times we succeeded */
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long spps_delack; /* delayed acks sent */
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long spps_timeoutdrop; /* conn. dropped in rxmt timeout */
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long spps_rexmttimeo; /* retransmit timeouts */
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long spps_persisttimeo; /* persist timeouts */
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long spps_keeptimeo; /* keepalive timeouts */
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long spps_keepprobe; /* keepalive probes sent */
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long spps_keepdrops; /* connections dropped in keepalive */
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long spps_sndtotal; /* total packets sent */
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long spps_sndpack; /* data packets sent */
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long spps_sndbyte; /* data bytes sent */
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long spps_sndrexmitpack; /* data packets retransmitted */
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long spps_sndrexmitbyte; /* data bytes retransmitted */
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long spps_sndacks; /* ack-only packets sent */
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long spps_sndprobe; /* window probes sent */
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long spps_sndurg; /* packets sent with URG only */
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long spps_sndwinup; /* window update-only packets sent */
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long spps_sndctrl; /* control (SYN|FIN|RST) packets sent */
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long spps_sndvoid; /* couldn't find requested packet*/
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long spps_rcvtotal; /* total packets received */
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long spps_rcvpack; /* packets received in sequence */
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long spps_rcvbyte; /* bytes received in sequence */
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long spps_rcvbadsum; /* packets received with ccksum errs */
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long spps_rcvbadoff; /* packets received with bad offset */
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long spps_rcvshort; /* packets received too short */
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long spps_rcvduppack; /* duplicate-only packets received */
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long spps_rcvdupbyte; /* duplicate-only bytes received */
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long spps_rcvpartduppack; /* packets with some duplicate data */
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long spps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */
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long spps_rcvoopack; /* out-of-order packets received */
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long spps_rcvoobyte; /* out-of-order bytes received */
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long spps_rcvpackafterwin; /* packets with data after window */
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long spps_rcvbyteafterwin; /* bytes rcvd after window */
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long spps_rcvafterclose; /* packets rcvd after "close" */
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long spps_rcvwinprobe; /* rcvd window probe packets */
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long spps_rcvdupack; /* rcvd duplicate acks */
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long spps_rcvacktoomuch; /* rcvd acks for unsent data */
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long spps_rcvackpack; /* rcvd ack packets */
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long spps_rcvackbyte; /* bytes acked by rcvd acks */
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long spps_rcvwinupd; /* rcvd window update packets */
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};
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struct spp_istat {
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short hdrops;
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short badsum;
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short badlen;
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short slotim;
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short fastim;
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short nonucn;
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short noconn;
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short notme;
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short wrncon;
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short bdreas;
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short gonawy;
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short notyet;
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short lstdup;
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struct sppstat newstats;
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};
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#ifdef _KERNEL
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extern struct spp_istat spp_istat;
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/* Following was struct sppstat sppstat; */
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#ifndef sppstat
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#define sppstat spp_istat.newstats
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#endif
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extern u_short spp_iss;
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struct sppcb;
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struct spidp;
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/* spp_debug.c */
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void spp_trace __P((int, u_int, struct sppcb *, struct spidp *, int));
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/* spp_usrreq.c */
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void spp_init __P((void));
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void spp_input __P((struct mbuf *, ...));
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int spp_reass __P((struct sppcb *, struct spidp *, struct mbuf *));
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void *spp_ctlinput __P((int, struct sockaddr *, void *));
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void spp_quench __P((struct nspcb *));
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int spp_fixmtu __P((struct nspcb *));
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int spp_output __P((struct mbuf *, ...));
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void spp_setpersist __P((struct sppcb *));
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int spp_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
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int spp_usrreq __P((struct socket *, int, struct mbuf *, struct mbuf *,
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struct mbuf *, struct proc *));
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int spp_usrreq_sp __P((struct socket *, int, struct mbuf *, struct mbuf *,
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struct mbuf *, struct proc *));
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void spp_template __P((struct sppcb *));
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struct sppcb *spp_close __P((struct sppcb *));
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struct sppcb *spp_usrclosed __P((struct sppcb *));
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struct sppcb *spp_disconnect __P((struct sppcb *));
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struct sppcb *spp_drop __P((struct sppcb *, int));
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void spp_abort __P((struct nspcb *));
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void spp_fasttimo __P((void));
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void spp_slowtimo __P((void));
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struct sppcb *spp_timers __P((struct sppcb *, long));
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#endif
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#define SPP_ISSINCR 128
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/*
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* SPP sequence numbers are 16 bit integers operated
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* on with modular arithmetic. These macros can be
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* used to compare such integers.
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*/
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#ifdef sun
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short xnsCbug;
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#define SSEQ_LT(a,b) ((xnsCbug = (short)((a)-(b))) < 0)
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#define SSEQ_LEQ(a,b) ((xnsCbug = (short)((a)-(b))) <= 0)
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#define SSEQ_GT(a,b) ((xnsCbug = (short)((a)-(b))) > 0)
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#define SSEQ_GEQ(a,b) ((xnsCbug = (short)((a)-(b))) >= 0)
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#else
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#define SSEQ_LT(a,b) (((short)((a)-(b))) < 0)
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#define SSEQ_LEQ(a,b) (((short)((a)-(b))) <= 0)
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#define SSEQ_GT(a,b) (((short)((a)-(b))) > 0)
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#define SSEQ_GEQ(a,b) (((short)((a)-(b))) >= 0)
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#endif
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