185 lines
6.8 KiB
C
185 lines
6.8 KiB
C
/*
|
|
* Copyright (c) 1995, Mike Mitchell
|
|
* Copyright (c) 1984, 1985, 1986, 1987, 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.
|
|
*
|
|
* @(#)spx.h
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _NETIPX_SPX_H_
|
|
#define _NETIPX_SPX_H_
|
|
|
|
/*
|
|
* Definitions for IPX style Sequenced Packet Protocol
|
|
*/
|
|
|
|
struct spxhdr {
|
|
u_char spx_cc; /* connection control */
|
|
u_char spx_dt; /* datastream type */
|
|
#define SPX_SP 0x80 /* system packet */
|
|
#define SPX_SA 0x40 /* send acknowledgement */
|
|
#define SPX_OB 0x20 /* attention (out of band data) */
|
|
#define SPX_EM 0x10 /* end of message */
|
|
u_short spx_sid; /* source connection identifier */
|
|
u_short spx_did; /* destination connection identifier */
|
|
u_short spx_seq; /* sequence number */
|
|
u_short spx_ack; /* acknowledge number */
|
|
u_short spx_alo; /* allocation number */
|
|
};
|
|
|
|
/*
|
|
* Definitions for NS(tm) Internet Datagram Protocol
|
|
* containing a Sequenced Packet Protocol packet.
|
|
*/
|
|
struct spx {
|
|
struct ipx si_i;
|
|
struct spxhdr si_s;
|
|
};
|
|
struct spx_q {
|
|
struct spx_q *si_next;
|
|
struct spx_q *si_prev;
|
|
};
|
|
#define SI(x) ((struct spx *)x)
|
|
#define si_sum si_i.ipx_sum
|
|
#define si_len si_i.ipx_len
|
|
#define si_tc si_i.ipx_tc
|
|
#define si_pt si_i.ipx_pt
|
|
#define si_dna si_i.ipx_dna
|
|
#define si_sna si_i.ipx_sna
|
|
#define si_sport si_i.ipx_sna.x_port
|
|
#define si_cc si_s.spx_cc
|
|
#define si_dt si_s.spx_dt
|
|
#define si_sid si_s.spx_sid
|
|
#define si_did si_s.spx_did
|
|
#define si_seq si_s.spx_seq
|
|
#define si_ack si_s.spx_ack
|
|
#define si_alo si_s.spx_alo
|
|
|
|
/*
|
|
* SPX control block, one per connection
|
|
*/
|
|
struct spxpcb {
|
|
struct spx_q s_q; /* queue for out-of-order receipt */
|
|
struct ipxpcb *s_ipxpcb; /* backpointer to internet pcb */
|
|
u_char s_state;
|
|
u_char s_flags;
|
|
#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
|
|
connection */
|
|
struct ipx *s_ipx;
|
|
struct spxhdr s_shdr; /* prototype header to transmit */
|
|
#define s_cc s_shdr.spx_cc /* connection control (for EM bit) */
|
|
#define s_dt s_shdr.spx_dt /* datastream type */
|
|
#define s_sid s_shdr.spx_sid /* source connection identifier */
|
|
#define s_did s_shdr.spx_did /* destination connection identifier */
|
|
#define s_seq s_shdr.spx_seq /* sequence number */
|
|
#define s_ack s_shdr.spx_ack /* acknowledge number */
|
|
#define s_alo s_shdr.spx_alo /* allocation number */
|
|
#define s_dport s_ipx->ipx_dna.x_port /* where we are sending */
|
|
struct spxhdr 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 */
|
|
|
|
/* congestion control */
|
|
#define CUNIT 1024 /* scaling for ... */
|
|
int s_cwnd; /* Congestion-controlled window */
|
|
/* in packets * CUNIT */
|
|
short s_swnd; /* == tcp snd_wnd, in packets */
|
|
short s_smxw; /* == tcp max_sndwnd */
|
|
/* difference of two spx_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 threshold for
|
|
* slow start exponential-to-
|
|
* linear switch */
|
|
/* transmit timing stuff
|
|
* 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 */
|
|
#define SPXT_NTIMERS 4
|
|
short s_timer[SPXT_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 */
|
|
|
|
/* out of band data */
|
|
char s_oobflags;
|
|
#define SF_SOOB 0x08 /* sending out of band data */
|
|
#define SF_IOOB 0x10 /* receiving out of band data */
|
|
char s_iobc; /* input characters */
|
|
/* debug stuff */
|
|
u_short s_want; /* Last candidate for sending */
|
|
char s_outx; /* exit taken from spx_output */
|
|
char s_inx; /* exit taken from spx_input */
|
|
u_short s_flags2; /* more flags for testing */
|
|
#define SF_NEWCALL 0x100 /* for new_recvmsg */
|
|
#define SO_NEWCALL 10 /* for new_recvmsg */
|
|
};
|
|
|
|
#define ipxtospxpcb(np) ((struct spxpcb *)(np)->ipxp_pcb)
|
|
#define sotospxpcb(so) (ipxtospxpcb(sotoipxpcb(so)))
|
|
|
|
#ifdef _KERNEL
|
|
|
|
extern struct pr_usrreqs spx_usrreqs;
|
|
extern struct pr_usrreqs spx_usrreq_sps;
|
|
|
|
void spx_ctlinput(int cmd, struct sockaddr *arg_as_sa, void *dummy);
|
|
int spx_ctloutput(struct socket *so, struct sockopt *sopt);
|
|
void spx_fasttimo(void);
|
|
void spx_init(void);
|
|
void spx_input(struct mbuf *m, struct ipxpcb *ipxp);
|
|
void spx_slowtimo(void);
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_NETIPX_SPX_H_ */
|