* Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 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
* from: @(#)spp_var.h 7.7 (Berkeley) 6/28/90
* $Id: spp_var.h,v 1.3 1993/11/07 17:50:41 wollman Exp $
#ifndef _NETNS_SPP_VAR_H_
#define _NETNS_SPP_VAR_H_ 1
* Sp control block, one per connection
struct spidp_q s_q
; /* queue for out-of-order receipt */
struct nspcb
*s_nspcb
; /* backpointer to internet pcb */
#define SF_ACKNOW 0x01 /* Ack peer immediately */
#define SF_DELACK 0x02 /* Ack, but try to delay it */
#define SF_HI 0x04 /* Show headers on input */
#define SF_HO 0x08 /* Show headers on output */
#define SF_PI 0x10 /* Packet (datagram) interface */
#define SF_WIN 0x20 /* Window info changed */
#define SF_RXT 0x40 /* Rxt info changed */
#define SF_RVD 0x80 /* Calling from read usrreq routine */
u_short s_mtu
; /* Max packet size for this stream */
/* use sequence fields in headers to store sequence numbers for this
struct sphdr s_shdr
; /* prototype header to transmit */
#define s_cc s_shdr.sp_cc /* connection control (for EM bit) */
#define s_dt s_shdr.sp_dt /* datastream type */
#define s_sid s_shdr.sp_sid /* source connection identifier */
#define s_did s_shdr.sp_did /* destination connection identifier */
#define s_seq s_shdr.sp_seq /* sequence number */
#define s_ack s_shdr.sp_ack /* acknowledge number */
#define s_alo s_shdr.sp_alo /* allocation number */
#define s_dport s_idp->idp_dna.x_port /* where we are sending */
struct sphdr s_rhdr
; /* last received header (in effect!)*/
u_short s_rack
; /* their acknowledge number */
u_short s_ralo
; /* their allocation number */
u_short s_smax
; /* highest packet # we have sent */
u_short s_snxt
; /* which packet to send next */
#define CUNIT 1024 /* scaling for ... */
int s_cwnd
; /* Congestion-controlled window */
short s_swnd
; /* == tcp snd_wnd, in packets */
short s_smxw
; /* == tcp max_sndwnd */
/* difference of two spp_seq's can be
no bigger than a short */
u_short s_swl1
; /* == tcp snd_wl1 */
u_short s_swl2
; /* == tcp snd_wl2 */
int s_cwmx
; /* max allowable cwnd */
int s_ssthresh
; /* s_cwnd size threshhold for
* slow start exponential-to-
* srtt and rttvar are stored as fixed point, for convenience in smoothing.
* srtt has 3 bits to the right of the binary point, rttvar has 2.
short s_idle
; /* time idle */
short s_timer
[SPPT_NTIMERS
]; /* timers */
short s_rxtshift
; /* log(2) of rexmt exp. backoff */
short s_rxtcur
; /* current retransmit value */
u_short s_rtseq
; /* packet being timed */
short s_rtt
; /* timer for round trips */
short s_srtt
; /* averaged timer */
short s_rttvar
; /* variance in round trip time */
char s_force
; /* which timer expired */
char s_dupacks
; /* counter to intuit xmt loss */
#define SF_SOOB 0x08 /* sending out of band data */
#define SF_IOOB 0x10 /* receiving out of band data */
char s_iobc
; /* input characters */
u_short s_want
; /* Last candidate for sending */
char s_outx
; /* exit taken from spp_output */
char s_inx
; /* exit taken from spp_input */
u_short s_flags2
; /* more flags for testing */
#define SF_NEWCALL 0x100 /* for new_recvmsg */
#define SO_NEWCALL 10 /* for new_recvmsg */
#define nstosppcb(np) ((struct sppcb *)(np)->nsp_pcb)
#define sotosppcb(so) (nstosppcb(sotonspcb(so)))
long spps_connattempt
; /* connections initiated */
long spps_accepts
; /* connections accepted */
long spps_connects
; /* connections established */
long spps_drops
; /* connections dropped */
long spps_conndrops
; /* embryonic connections dropped */
long spps_closed
; /* conn. closed (includes drops) */
long spps_segstimed
; /* segs where we tried to get rtt */
long spps_rttupdated
; /* times we succeeded */
long spps_delack
; /* delayed acks sent */
long spps_timeoutdrop
; /* conn. dropped in rxmt timeout */
long spps_rexmttimeo
; /* retransmit timeouts */
long spps_persisttimeo
; /* persist timeouts */
long spps_keeptimeo
; /* keepalive timeouts */
long spps_keepprobe
; /* keepalive probes sent */
long spps_keepdrops
; /* connections dropped in keepalive */
long spps_sndtotal
; /* total packets sent */
long spps_sndpack
; /* data packets sent */
long spps_sndbyte
; /* data bytes sent */
long spps_sndrexmitpack
; /* data packets retransmitted */
long spps_sndrexmitbyte
; /* data bytes retransmitted */
long spps_sndacks
; /* ack-only packets sent */
long spps_sndprobe
; /* window probes sent */
long spps_sndurg
; /* packets sent with URG only */
long spps_sndwinup
; /* window update-only packets sent */
long spps_sndctrl
; /* control (SYN|FIN|RST) packets sent */
long spps_sndvoid
; /* couldn't find requested packet*/
long spps_rcvtotal
; /* total packets received */
long spps_rcvpack
; /* packets received in sequence */
long spps_rcvbyte
; /* bytes received in sequence */
long spps_rcvbadsum
; /* packets received with ccksum errs */
long spps_rcvbadoff
; /* packets received with bad offset */
long spps_rcvshort
; /* packets received too short */
long spps_rcvduppack
; /* duplicate-only packets received */
long spps_rcvdupbyte
; /* duplicate-only bytes received */
long spps_rcvpartduppack
; /* packets with some duplicate data */
long spps_rcvpartdupbyte
; /* dup. bytes in part-dup. packets */
long spps_rcvoopack
; /* out-of-order packets received */
long spps_rcvoobyte
; /* out-of-order bytes received */
long spps_rcvpackafterwin
; /* packets with data after window */
long spps_rcvbyteafterwin
; /* bytes rcvd after window */
long spps_rcvafterclose
; /* packets rcvd after "close" */
long spps_rcvwinprobe
; /* rcvd window probe packets */
long spps_rcvdupack
; /* rcvd duplicate acks */
long spps_rcvacktoomuch
; /* rcvd acks for unsent data */
long spps_rcvackpack
; /* rcvd ack packets */
long spps_rcvackbyte
; /* bytes acked by rcvd acks */
long spps_rcvwinupd
; /* rcvd window update packets */
extern struct spp_istat spp_istat
;
/* Following was struct sppstat sppstat; */
#define sppstat spp_istat.newstats
* SPP sequence numbers are 16 bit integers operated
* on with modular arithmetic. These macros can be
* used to compare such integers.
#define SSEQ_LT(a,b) (((short)((a)-(b))) < 0)
#define SSEQ_LEQ(a,b) (((short)((a)-(b))) <= 0)
#define SSEQ_GT(a,b) (((short)((a)-(b))) > 0)
#define SSEQ_GEQ(a,b) (((short)((a)-(b))) >= 0)
extern void spp_trace(int /*short*/, int /*u_char*/, struct sppcb
*,
extern struct spp_istat spp_istat
;
extern void spp_init(void);
extern void spp_input(struct mbuf
*, struct nspcb
*);
extern int spprexmtthresh
;
extern int spp_reass(struct sppcb
*, struct spidp
*);
extern void spp_ctlinput(int, caddr_t
);
extern int spp_output(struct sppcb
*, struct mbuf
*);
extern int spp_do_persist_panics
;
extern int spp_ctloutput(int, struct socket
*, int, int, struct mbuf
**);
extern int spp_usrreq(struct socket
*, int, struct mbuf
*, struct mbuf
*,
struct mbuf
*, struct mbuf
*);
extern int spp_usrreq_sp(struct socket
*, int, struct mbuf
*, struct mbuf
*,
struct mbuf
*, struct mbuf
*);
extern struct sppcb
*spp_close(struct sppcb
*);
extern struct sppcb
*spp_usrclosed(struct sppcb
*);
extern struct sppcb
*spp_disconnect(struct sppcb
*);
extern struct sppcb
*spp_drop(struct sppcb
*, int);
extern void spp_fasttimo(void);
extern void spp_slowtimo(void);
extern struct sppcb
*spp_timers(struct sppcb
*, int);
#endif /* _NETNS_SPP_VAR_H_ */