* 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
* 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
* @(#)tp_subr2.c 8.1 (Berkeley) 6/10/93
/***********************************************************
Copyright IBM Corporation 1987
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
******************************************************************/
* ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
* $Header: tp_subr2.c,v 5.5 88/11/18 17:28:55 nhall Exp $
* $Source: /usr/argo/sys/netiso/RCS/tp_subr2.c,v $
* Some auxiliary routines:
* tp_protocol_error: required by xebec- called when a combo of state,
* event, predicate isn't covered for by the transition file.
* tp_indicate: gives indications(signals) to the user process
* tp_getoptions: initializes variables that are affected by the options
/* this def'n is to cause the expansion of this macro in the
* routine tp_local_credit :
#define LOCAL_CREDIT_EXPAND
#include <sys/socketvar.h>
#include <netiso/argo_debug.h>
#include <netiso/tp_param.h>
#include <netiso/tp_ip.h>
#include <netiso/iso_errno.h>
#include <netiso/iso_pcb.h>
#include <netiso/tp_timer.h>
#include <netiso/tp_stat.h>
#include <netiso/tp_tpdu.h>
#include <netiso/tp_pcb.h>
#include <netiso/tp_seq.h>
#include <netiso/tp_trace.h>
#include <netiso/tp_user.h>
#include <net/if_types.h>
#include <netccitt/x25.h>
#include <netccitt/pk_var.h>
* NAME: tp_local_credit()
* FUNCTION and ARGUMENTS:
* Computes the local credit and stashes it in tpcb->tp_lcredit.
* It's a macro in the production system rather than a procdure.
* This doesn't actually get called in a production system -
* the macro gets expanded instead in place of calls to this proc.
* But for debugging, we call this and that allows us to add
* debugging messages easily here.
printf("ref 0x%x lcdt 0x%x l_tpdusize 0x%x decbit 0x%x\n",
tpcb
->tp_lcredit
, tpcb
->tp_l_tpdusize
, 0, 0);
* NAME: tp_protocol_error()
* tp_driver(), when it doesn't know what to do with
* a combo of event, state, predicate
* FUNCTION and ARGUMENTS:
tp_protocol_error(e
,tpcb
)
printf("TP PROTOCOL ERROR! tpcb 0x%x event 0x%x, state 0x%x\n",
tpcb
, e
->ev_number
, tpcb
->tp_state
);
tptraceTPCB(TPPTmisc
, "PROTOCOL ERROR tpcb event state",
tpcb
, e
->ev_number
, tpcb
->tp_state
, 0 );
return EIO
; /* for lack of anything better */
/* Not used at the moment */
* tp.trans when XPD arrive, when a connection is being disconnected by
* the arrival of a DR or ER, and when a connection times out.
* FUNCTION and ARGUMENTS:
* (ind) is the type of indication : T_DISCONNECT, T_XPD
* (error) is an E* value that will be put in the socket structure
* to be passed along to the user later.
* Gives a SIGURG to the user process or group indicated by the socket
tp_indicate(ind
, tpcb
, error
)
register struct tp_pcb
*tpcb
;
register struct socket
*so
= tpcb
->tp_sock
;
tptraceTPCB(TPPTindicate
, ind
, *(u_short
*)(tpcb
->tp_lsuffix
),
*(u_short
*)(tpcb
->tp_fsuffix
), error
,so
->so_pgid
);
"indicate 0x%x lsuf 0x%02x%02x fsuf 0x%02x%02x err 0x%x noind 0x%x ref 0x%x\n",
*ls
, *(ls
+1), *fs
, *(fs
+1),
tpcb
->tp_no_disc_indications
,
if ((so
->so_state
& SS_CANTRCVMORE
) == 0 &&
(m
= m_get(M_DONTWAIT
, MT_OOBDATA
)) != 0) {
x
.dr_hdr
.cmsg_len
= m
->m_len
= sizeof(x
);
x
.dr_hdr
.cmsg_level
= SOL_TRANSPORT
;
x
.dr_hdr
.cmsg_type
= TPOPT_DISC_REASON
;
*mtod(m
, struct tp_disc_reason
*) = x
;
sbappendrecord(&tpcb
->tp_Xrcv
, m
);
if (ind
== T_DISCONNECT
) {
if ( tpcb
->tp_no_disc_indications
)
tptraceTPCB(TPPTmisc
, "doing sohasoutofband(so)", so
,0,0,0);
* tp.trans whenever we go into OPEN state
* FUNCTION and ARGUMENTS:
* sets the proper flags and values in the tpcb, to control
* the appropriate actions for the given class, options,
* sequence space, etc, etc.
tpcb
->tp_xtd_format
? TP_XTD_FMT_MASK
: TP_NML_FMT_MASK
;
tpcb
->tp_xtd_format
? TP_XTD_FMT_BIT
: TP_NML_FMT_BIT
;
tpcb
->tp_seqhalf
= tpcb
->tp_seqbit
>> 1;
max(tpcb
->tp_dt_ticks
, (tpcb
->tp_peer_acktime
+ 2));
* NAME: tp_recycle_tsuffix()
* Called when a ref is frozen.
* FUNCTION and ARGUMENTS:
* allows the suffix to be reused.
bzero((caddr_t
)tpcb
->tp_lsuffix
, sizeof( tpcb
->tp_lsuffix
));
bzero((caddr_t
)tpcb
->tp_fsuffix
, sizeof( tpcb
->tp_fsuffix
));
tpcb
->tp_fsuffixlen
= tpcb
->tp_lsuffixlen
= 0;
(tpcb
->tp_nlproto
->nlp_recycle_suffix
)(tpcb
->tp_npcb
);
* tp{af}_quench() when ICMP source quench or similar thing arrives.
* FUNCTION and ARGUMENTS:
* Drop the congestion window back to 1.
* Congestion window scheme:
* Initial value is 1. ("slow start" as Nagle, et. al. call it)
* For each good ack that arrives, the congestion window is increased
* by 1 (up to max size of logical infinity, which is to say,
* it doesn't wrap around).
* Source quench causes it to drop back to 1.
* tp_send() uses the smaller of (regular window, congestion window).
* One retransmission strategy option is to have any retransmission
* cause reset the congestion window back to 1.
* (cmd) is either PRC_QUENCH: source quench, or
* PRC_QUENCH2: dest. quench (dec bit)
printf("tp_quench tpcb 0x%x ref 0x%x sufx 0x%x\n",
tpcb
, tpcb
->tp_lref
, *(u_short
*)(tpcb
->tp_lsuffix
));
printf("cong_win 0x%x decbit 0x%x \n",
tpcb
->tp_cong_win
, tpcb
->tp_decbit
);
tpcb
->tp_cong_win
= tpcb
->tp_l_tpdusize
;
tpcb
->tp_cong_win
= tpcb
->tp_l_tpdusize
; /* might as well quench source also */
tpcb
->tp_decbit
= TP_DECBIT_CLEAR_COUNT
;
* FUNCTION and ARGUMENTS:
if (tpcb
->tp_netservice
!= ISO_CONS
)
isop
= (struct isopcb
*)tpcb
->tp_npcb
;
lcp
= (struct pklcd
*)isop
->isop_chan
;
if (isop
->isop_refcnt
== 1) {
/* This is really superfluous, since it would happen
anyway in iso_pcbdetach, although it is a courtesy
to free up the x.25 channel before the refwait timer
printf("tp_netcmd(0x%x, 0x%x) NOT IMPLEMENTED\n", tpcb
, cmd
);
printf("tp_netcmd(): X25 NOT CONFIGURED!!\n");
* tp_ctloutput() and tp_emit()
* FUNCTION and ARGUMENTS:
* Convert a class mask to the highest numeric value it represents.
ASSERT( (j
== 4) || (j
== 0) ); /* for now */
if( (j
!= 4) && (j
!= 0) ) {
printf("ASSERTION ERROR: tp_mask_to_num: x 0x%x j %d\n",
tptrace(TPPTmisc
, "tp_mask_to_num(x) returns j", x
, j
, 0, 0);
printf("tp_mask_to_num(0x%x) returns 0x%x\n", x
, j
);
struct tp_conn_param
*src
, *dst
;
/* copy all but the bits stuff at the end */
#define COPYSIZE (12 * sizeof(short))
bcopy((caddr_t
)src
, (caddr_t
)dst
, COPYSIZE
);
dst
->p_tpdusize
= src
->p_tpdusize
;
dst
->p_ack_strat
= src
->p_ack_strat
;
dst
->p_rx_strat
= src
->p_rx_strat
;
* Determine a reasonable value for maxseg size.
* If the route is known, check route for mtu.
* We also initialize the congestion/slow start
* window to be a single segment if the destination isn't local.
* While looking at the routing entry, we also initialize other path-dependent
* parameters from pre-set or cached values in the routing entry.
register struct tp_pcb
*tpcb
;
register struct rtentry
*rt
;
int i
, ssthresh
= 0, rt_mss
;
mss
= tpcb
->tp_ptpdusize
<< 7;
mss
= 1 << tpcb
->tp_tpdusize
;
if ((rt
= *(tpcb
->tp_routep
)) == 0) {
bufsize
= so
->so_rcv
.sb_hiwat
;
#ifdef RTV_MTU /* if route characteristics exist ... */
* While we're here, check if there's an initial rtt
* or rttvar. Convert from the route-table units
* to hz ticks for the smoothed timers and slow-timeout units
* for other inital variables.
if (tpcb
->tp_rtt
== 0 && (rtt
= rt
->rt_rmx
.rmx_rtt
)) {
tpcb
->tp_rtt
= rtt
* hz
/ RTM_RTTUNIT
;
if (rt
->rt_rmx
.rmx_rttvar
)
tpcb
->tp_rtv
= rt
->rt_rmx
.rmx_rttvar
tpcb
->tp_rtv
= tpcb
->tp_rtt
;
* if there's an mtu associated with the route, use it
rt_mss
= rt
->rt_rmx
.rmx_mtu
- nhdr_size
;
rt_mss
= (ifp
->if_mtu
- nhdr_size
);
if (tpcb
->tp_ptpdusize
== 0 || /* assume application doesn't care */
mss
> rt_mss
/* network won't support what was asked for */)
/* can propose mtu which are multiples of 128 */
* If there's a pipesize, change the socket buffer
if ((bufsize
= rt
->rt_rmx
.rmx_sendpipe
) > 0) {
bufsize
= min(bufsize
, so
->so_snd
.sb_hiwat
);
(void) sbreserve(&so
->so_snd
, bufsize
);
if ((bufsize
= rt
->rt_rmx
.rmx_recvpipe
) > 0) {
bufsize
= min(bufsize
, so
->so_rcv
.sb_hiwat
);
(void) sbreserve(&so
->so_rcv
, bufsize
);
bufsize
= so
->so_rcv
.sb_hiwat
;
* There's some sort of gateway or interface
* buffer limit on the path. Use this to set
* the slow start threshhold, but set the
* threshold to no less than 2*mss.
ssthresh
= rt
->rt_rmx
.rmx_ssthresh
;
* The current mss is initialized to the default value.
* If we compute a smaller value, reduce the current mss.
* If we compute a larger value, return it for use in sending
* If we received an offer, don't exceed it.
* However, do not accept offers under 128 bytes.
mss
= min(mss
, tpcb
->tp_l_tpdusize
);
* We want a minimum recv window of 4 packets to
* signal packet loss by duplicate acks.
mss
= min(mss
, bufsize
>> 2) & ~0x7f;
mss
= max(mss
, 128); /* sanity */
(rt
== 0 || (rt
->rt_flags
& RTF_GATEWAY
)) ? mss
: bufsize
;
tpcb
->tp_l_tpdusize
= mss
;
tpcb
->tp_ssthresh
= max(2 * mss
, ssthresh
);
/* Calculate log2 of mss */
for (i
= TP_MIN_TPDUSIZE
+ 1; i
<= TP_MAX_TPDUSIZE
; i
++)
* tp_usrreq on PRU_CONNECT and tp_input on receipt of CR
* FUNCTION and ARGUMENTS:
* -- An mbuf containing the peer's network address.
* -- Our control block, which will be modified
* -- In the case of cons, a control block for that layer.
* EAFNOSUPPORT if can't find an nl_protosw for x.25 (really could panic)
* ECONNREFUSED if trying to run TP0 with non-type 37 address
* possibly other E* returned from cons_netcmd()
* Determines recommended tpdusize, buffering and intial delays
* based on information cached on the route.
tp_route_to( m
, tpcb
, channel
)
register struct tp_pcb
*tpcb
;
register struct sockaddr_iso
*siso
; /* NOTE: this may be a sockaddr_in */
extern struct tp_conn_param tp_conn_param
[];
int error
= 0, save_netservice
= tpcb
->tp_netservice
;
register struct rtentry
*rt
= 0;
int nhdr_size
, mtu
, bufsize
;
siso
= mtod(m
, struct sockaddr_iso
*);
"route_to: so afi netservice class",
tpcb
->tp_sock
, siso
->siso_addr
.isoa_genaddr
[0], tpcb
->tp_netservice
,
printf("tp_route_to( m x%x, channel 0x%x, tpcb 0x%x netserv 0x%x)\n",
m
, channel
, tpcb
, tpcb
->tp_netservice
);
printf("m->mlen x%x, m->m_data:\n", m
->m_len
);
dump_buf(mtod(m
, caddr_t
), m
->m_len
);
struct pklcd
*lcp
= (struct pklcd
*)channel
;
struct isopcb
*isop
= (struct isopcb
*)lcp
->lcd_upnext
,
*isop_new
= (struct isopcb
*)tpcb
->tp_npcb
;
/* The next 2 lines believe that you haven't
set any network level options or done a pcbconnect
and XXXXXXX'edly apply to both inpcb's and isopcb's */
tpcb
->tp_npcb
= (caddr_t
)isop
;
tpcb
->tp_netservice
= ISO_CONS
;
tpcb
->tp_nlproto
= nl_protosw
+ ISO_CONS
;
if (isop
->isop_refcnt
++ == 0) {
iso_putsufx(isop
, tpcb
->tp_lsuffix
, tpcb
->tp_lsuffixlen
, TP_LOCAL
);
isop
->isop_socket
= tpcb
->tp_sock
;
/* there are already connections sharing this */;
switch (siso
->siso_family
) {
struct isopcb
*isop
= (struct isopcb
*)tpcb
->tp_npcb
;
int flags
= tpcb
->tp_sock
->so_options
& SO_DONTROUTE
;
tpcb
->tp_netservice
= ISO_CLNS
;
if (clnp_route(&siso
->siso_addr
, &isop
->isop_route
,
flags
, (void **)0, (void **)0) == 0) {
rt
= isop
->isop_route
.ro_rt
;
if (rt
&& rt
->rt_flags
& RTF_PROTO1
)
tpcb
->tp_netservice
= ISO_CONS
;
tpcb
->tp_netservice
= IN_CLNS
;
if (tpcb
->tp_nlproto
->nlp_afamily
!= siso
->siso_family
) {
printf("tp_route_to( CHANGING nlproto old 0x%x new 0x%x)\n",
save_netservice
, tpcb
->tp_netservice
);
if (error
= tp_set_npcb(tpcb
))
printf("tp_route_to calling nlp_pcbconn, netserv %d\n",
tpcb
->tp_nlproto
= nl_protosw
+ tpcb
->tp_netservice
;
error
= (tpcb
->tp_nlproto
->nlp_pcbconn
)(tpcb
->tp_npcb
, m
);
nhdr_size
= tpcb
->tp_nlproto
->nlp_mtu(tpcb
); /* only gets common info */
printf("tp_route_to returns 0x%x\n", error
);
tptraceTPCB(TPPTmisc
, "route_to: returns: error netserv class", error
,
tpcb
->tp_netservice
, tpcb
->tp_class
, 0);
register struct tp_pcb
*tpcb
;
register struct tp_event
*e
;
#define E e->ATTR(DT_TPDU)
#define E e->ev_union.EV_DT_TPDU
register struct sockbuf
*sb
= &tpcb
->tp_sock
->so_rcv
;
register struct isopcb
*isop
= (struct isopcb
*)tpcb
->tp_npcb
;
PStat(tpcb
, Nb_from_ll
) += E
.e_datalen
;
tpmeas(tpcb
->tp_lref
, TPtime_from_ll
, &e
->e_time
,
E
.e_seq
, PStat(tpcb
, Nb_from_ll
), E
.e_datalen
);
printf("stash EQ: seq 0x%x datalen 0x%x eot 0x%x",
E
.e_seq
, E
.e_datalen
, E
.e_eot
);
tptraceTPCB(TPPTmisc
, "stash EQ: seq len eot",
E
.e_seq
, E
.e_datalen
, E
.e_eot
, 0);
register struct mbuf
*n
= E
.e_data
;
n
->m_act
= MNULL
; /* set on tp_input */
dump_mbuf(sb
->sb_mb
, "stash 0: so_rcv after appending");
if (tpcb
->tp_netservice
!= ISO_CONS
)
printf("tp0_stash: tp running over something wierd\n");
register struct pklcd
*lcp
= (struct pklcd
*)isop
->isop_chan
;
pk_flowcontrol(lcp
, sbspace(sb
) <= 0, 1);
register struct tp_pcb
*tpcb
;
register struct isopcb
*isop
= (struct isopcb
*)tpcb
->tp_npcb
;
if (tpcb
->tp_netservice
!= ISO_CONS
)
printf("tp0_openflow: tp running over something wierd\n");
register struct pklcd
*lcp
= (struct pklcd
*)isop
->isop_chan
;
if (lcp
->lcd_rxrnr_condition
)
pk_flowcontrol(lcp
, 0, 0);
* tp_ctloutput() when the user sets TPOPT_PERF_MEAS on
* and tp_newsocket() when a new connection is made from
* a listening socket with tp_perf_on == true.
* FUNCTION and ARGUMENTS:
* (tpcb) is the usual; this procedure gets a clear cluster mbuf for
* a tp_pmeas structure, and makes tpcb->tp_p_meas point to it.
* ENOBUFS if it cannot get a cluster mbuf.
register struct tp_pcb
*tpcb
;
if( tpcb
->tp_p_meas
== 0 ) {
MGET(q
, M_WAITOK
, MT_PCB
);
if ((q
->m_flags
& M_EXT
) == 0) {
q
->m_len
= sizeof (struct tp_pmeas
);
tpcb
->tp_p_meas
= mtod(q
, struct tp_pmeas
*);
bzero( (caddr_t
)tpcb
->tp_p_meas
, sizeof (struct tp_pmeas
) );
"tpcb 0x%x so 0x%x ref 0x%x tp_p_meas 0x%x tp_perf_on 0x%x\n",
tpcb
, tpcb
->tp_sock
, tpcb
->tp_lref
,
tpcb
->tp_p_meas
, tpcb
->tp_perf_on
);
#endif /* TP_PERF_MEAS */
register struct sockaddr
*addr
;
switch( addr
->sa_family
) {
dump_inaddr((struct sockaddr_in
*)addr
);
dump_isoaddr((struct sockaddr_iso
*)addr
);
printf("BAD AF: 0x%x\n", addr
->sa_family
);
* Dump the buffer to the screen in a readable format. Format is:
* hex/dec where hex is the hex format, dec is the decimal format.
* columns of hex/dec numbers will be printed, followed by the
* character representations (if printable).
#define Buf ((u_char *)buf)
printf("Dump buf 0x%x len 0x%x\n", buf
, len
);
for (i
= 0; i
< len
; i
+= MAX_COLUMNS
) {
for (j
= 0; j
< MAX_COLUMNS
; j
++) {
printf("%x/%d\t", Buf
[i
+j
], Buf
[i
+j
]);
for (j
= 0; j
< MAX_COLUMNS
; j
++) {
if (((Buf
[i
+j
]) > 31) && ((Buf
[i
+j
]) < 128))