* Copyright (c) 1991 The 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
* @(#)tp_input.c 7.19 (Berkeley) 6/27/91
* $Id: tp_input.c,v 1.3 1993/11/25 01:36:05 wollman Exp $
/***********************************************************
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
* tp_input() gets an mbuf chain from ip. Actually, not directly
* from ip, because ip calls a net-level routine that strips off
* the net header and then calls tp_input(), passing the proper type
* of addresses for the address family in use (how it figures out
* which AF is not yet determined.
* Decomposing the tpdu is some of the most laughable code. The variable-length
* parameters and the problem of non-aligned memory references
* necessitates such abominations as the macros WHILE_OPTIONS (q.v. below)
* to loop through the header and decompose it.
* The routine tp_newsocket() is called when a CR comes in for a listening
* socket. tp_input calls sonewconn() and tp_newsocket() to set up the
* "child" socket. Most tpcb values are copied from the parent tpcb into
* Also in here is tp_headersize() (grot) which tells the expected size
* of a tp header, to be used by other layers. It's in here because it
* uses the static structure tpdu_info.
#include "../netccitt/x25.h"
#include "../netccitt/pk.h"
#include "../netccitt/pk_var.h"
int iso_check_csum(), tp_driver(), tp_headersize(), tp_error_emit();
printf("tp_inputprep: m 0x%x\n", m
) ;
if( (m
= m_free(m
)) == MNULL
) {
if(((int)m
->m_data
) & 0x3) {
/* If we are not 4-byte aligned, we have to be
* above the beginning of the mbuf, and it is ok just
m
->m_data
= (caddr_t
)(((int)m
->m_data
) & ~0x3);
ovbcopy(ocp
, m
->m_data
, (unsigned)m
->m_len
);
CHANGE_MTYPE(m
, TPMT_DATA
);
/* we KNOW that there is at least 1 byte in this mbuf
and that it is hdr->tpdu_li XXXXXXX! */
hdrlen
= 1 + *mtod( m
, u_char
*);
* now pull up the whole tp header
if ( m
->m_len
< hdrlen
) {
if ((m
= m_pullup(m
, hdrlen
)) == MNULL
) {
" at end: m 0x%x hdr->tpdu_li 0x%x m_len 0x%x\n",m
,
* -- this array and the following macros allow you to step through the
* parameters of the variable part of a header
* note that if for any reason the values of the **_TPDU macros (in tp_events.h)
* should change, this array has to be rearranged
#define TP_LEN_CLASS_0_INDEX 2
#define TP_MAX_DATA_INDEX 3
static u_char tpdu_info
[][4] =
/* length max data len */
/* reg fmt xtd fmt class 0 */
/* UNUSED 0x0 */ 0x0 , 0x0, 0x0, 0x0,
/* XPD_TPDU_type 0x1 */ 0x5, 0x8, 0x0, TP_MAX_XPD_DATA
,
/* XAK_TPDU_type 0x2 */ 0x5 , 0x8, 0x0, 0x0,
/* GR_TPDU_type 0x3 */ 0x0 , 0x0, 0x0, 0x0,
/* UNUSED 0x4 */ 0x0 , 0x0, 0x0, 0x0,
/* UNUSED 0x5 */ 0x0 , 0x0, 0x0, 0x0,
/* AK_TPDU_type 0x6 */ 0x5, 0xa, 0x0, 0x0,
/* ER_TPDU_type 0x7 */ 0x5, 0x5, 0x0, 0x0,
/* DR_TPDU_type 0x8 */ 0x7, 0x7, 0x7, TP_MAX_DR_DATA
,
/* UNUSED 0x9 */ 0x0 , 0x0, 0x0, 0x0,
/* UNUSED 0xa */ 0x0 , 0x0, 0x0, 0x0,
/* UNUSED 0xb */ 0x0 , 0x0, 0x0, 0x0,
/* DC_TPDU_type 0xc */ 0x6, 0x6, 0x0, 0x0,
/* CC_TPDU_type 0xd */ 0x7, 0x7, 0x7, TP_MAX_CC_DATA
,
/* CR_TPDU_type 0xe */ 0x7, 0x7, 0x7, TP_MAX_CR_DATA
,
/* DT_TPDU_type 0xf */ 0x5, 0x8, 0x3, 0x0,
#define CHECK(Phrase, Erval, Stat, Whattodo, Loc)\
if (Phrase) {error = (Erval); errlen = (int)(Loc); IncStat(Stat); tpibrk();\
* WHENEVER YOU USE THE FOLLOWING MACRO,
* BE SURE THE TPDUTYPE IS A LEGIT VALUE FIRST!
#define WHILE_OPTIONS(P, hdr, format)\
{ register caddr_t P = tpdu_info[(hdr)->tpdu_type][(format)] + (caddr_t)hdr;\
caddr_t PLIM = 1 + hdr->tpdu_li + (caddr_t)hdr;\
for (;; P += 2 + ((struct tp_vbp *)P)->tpv_len) {\
CHECK((P > PLIM), E_TP_LENGTH_INVAL, ts_inv_length,\
respond, P - (caddr_t)hdr);\
#define END_WHILE_OPTIONS(P) } }
* tp_input() on incoming CR, when a socket w/ the called suffix
* is awaiting a connection request
* FUNCTION and ARGUMENTS:
* Create a new socket structure, attach to it a new transport pcb,
* using a copy of the net level pcb for the parent socket.
* (so) is the parent socket.
* (fname) is the foreign address (all that's used is the nsap portion)
* a new socket structure, being this end of the newly formed connection.
* Sets a few things in the tpcb and net level pcb
tp_newsocket(so
, fname
, cons_channel
, class_to_use
, netservice
)
register struct tp_pcb
*tpcb
= sototpcb(so
); /* old tpcb, needed below */
register struct tp_pcb
*newtpcb
;
* sonewconn() gets a new socket structure,
* a new lower layer pcb and a new tpcb,
* but the pcbs are unnamed (not bound)
tptraceTPCB(TPPTmisc
, "newsock: listg_so, _tpcb, so_head",
so
, tpcb
, so
->so_head
, 0);
if ((so
= sonewconn(so
, SS_ISCONFIRMING
)) == (struct socket
*)0)
tptraceTPCB(TPPTmisc
, "newsock: after newconn so, so_head",
printf("tp_newsocket(channel 0x%x) after sonewconn so 0x%x \n",
struct socket
*t
, *head
;
printf("so 0x%x so_head 0x%x so_q0 0x%x, q0len %d\n",
t
, t
->so_head
, t
->so_q0
, t
->so_q0len
);
while( (t
=t
->so_q0
) && t
!= so
&& t
!= head
)
printf("so 0x%x so_head 0x%x so_q0 0x%x, q0len %d\n",
t
, t
->so_head
, t
->so_q0
, t
->so_q0len
);
* before we clobber the old tpcb ptr, get these items from the parent pcb
newtpcb
->_tp_param
= tpcb
->_tp_param
;
newtpcb
->tp_flags
= tpcb
->tp_flags
;
newtpcb
->tp_lcredit
= tpcb
->tp_lcredit
;
newtpcb
->tp_l_tpdusize
= tpcb
->tp_l_tpdusize
;
newtpcb
->tp_lsuffixlen
= tpcb
->tp_lsuffixlen
;
bcopy( tpcb
->tp_lsuffix
, newtpcb
->tp_lsuffix
, newtpcb
->tp_lsuffixlen
);
soreserve(so
, (u_long
)tpcb
->tp_winsize
, (u_long
)tpcb
->tp_winsize
);
if( /* old */ tpcb
->tp_ucddata
) {
* These data are the connect- , confirm- or disconnect- data.
conndata
= m_copy(tpcb
->tp_ucddata
, 0, (int)M_COPYALL
);
dump_mbuf(conndata
, "conndata after mcopy");
newtpcb
->tp_ucddata
= conndata
;
tpcb
->tp_state
= TP_LISTENING
;
tpcb
->tp_class
= class_to_use
;
tpcb
->tp_netservice
= netservice
;
ASSERT( fname
!= 0 ) ; /* just checking */
* tp_route_to takes its address argument in the form of an mbuf.
MGET(m
, M_DONTWAIT
, MT_SONAME
); /* mbuf type used is confusing */
* this seems a bit grotesque, but tp_route_to expects
* an mbuf * instead of simply a sockaddr; it calls the ll
* pcb_connect, which expects the name/addr in an mbuf as well.
bcopy((caddr_t
)fname
, mtod(m
, caddr_t
), fname
->sa_len
);
m
->m_len
= fname
->sa_len
;
/* grot : have to say the kernel can override params in
tpcb
->tp_dont_change_params
= 0;
err
= tp_route_to( m
, tpcb
, (caddr_t
)cons_channel
);
printf("tp_route_to FAILED! detaching tpcb 0x%x, so 0x%x\n",
printf("tp_newsocket returning so 0x%x, sototpcb(so) 0x%x\n",
* net layer input routine
* FUNCTION and ARGUMENTS:
* Process an incoming TPDU (m), finding the associated tpcb if there
* is one. Create the appropriate type of event and call the driver.
* (faddr) and (laddr) are the foreign and local addresses.
* When tp_input() is called we KNOW that the ENTIRE TP HEADER
* When using COSNS it may affect the state of the net-level pcb
* The initial value of acktime is 2 so that we will never
* have a 0 value for tp_peer_acktime. It gets used in the
* computation of the retransmission timer value, and so it
* 2 seems like a reasonable minimum.
tp_input(m
, faddr
, laddr
, cons_channel
, dgout_routine
, ce_bit
)
struct sockaddr
*faddr
, *laddr
; /* NSAP addresses */
register struct tp_pcb
*tpcb
= (struct tp_pcb
*)0;
register struct tpdu
*hdr
;
u_short dref
, sref
= 0, acktime
= 2, subseq
= 0; /*VAX*/
u_char preferred_class
= 0, class_to_use
= 0;
u_char opt
, dusize
= TP_DFL_TPDUSIZE
, addlopt
= 0, version
= 0;
u_char fsufxlen
= 0, lsufxlen
= 0, intercepted
= 0;
caddr_t fsufxloc
= 0, lsufxloc
= 0;
u_int takes_data
= FALSE
;
u_int fcc_present
= FALSE
;
struct tp_conn_param tpp
;
hdr
= mtod(m
, struct tpdu
*);
GET_CUR_TIME( &e
.e_time
); perf_meas
= 0;
printf("tp_input(0x%x, ... 0x%x)\n", m
, cons_channel
);
* get the actual tpdu length - necessary for monitoring
* Also, maybe measure the mbuf chain lengths and sizes.
{ register struct mbuf
*n
=m
;
if( n
->m_flags
& M_EXT
) {
if (n
->m_next
== MNULL
) {
chain_length
= 0; /* zero used for anything > 16 */
tp_stat
.ts_mb_len_distr
[chain_length
] ++;
tptraceTPCB(TPPTtpduin
, hdr
->tpdu_type
, hdr
, hdr
->tpdu_li
+1, tpdu_len
,
dref
= ntohs((short)hdr
->tpdu_dref
);
sref
= ntohs((short)hdr
->tpdu_sref
);
dutype
= (int)hdr
->tpdu_type
;
printf("input: dutype 0x%x cons_channel 0x%x dref 0x%x\n", dutype
,
printf("input: dref 0x%x sref 0x%x\n", dref
, sref
);
tptrace(TPPTmisc
, "channel dutype dref ",
cons_channel
, dutype
, dref
, 0);
if( (dutype
< TP_MIN_TPDUTYPE
) || (dutype
> TP_MAX_TPDUTYPE
)) {
printf("BAD dutype! 0x%x, channel 0x%x dref 0x%x\n",
dutype
, cons_channel
, dref
);
dump_buf (m
, sizeof( struct mbuf
));
CHECK( (dutype
< TP_MIN_TPDUTYPE
|| dutype
> TP_MAX_TPDUTYPE
),
E_TP_INV_TPDU
, ts_inv_dutype
, respond
,
/* unfortunately we can't take the address of the tpdu_type field,
* since it's a bit field - so we just use the constant offset 2
/* Now this isn't very neat but since you locate a pcb one way
* at the beginning of connection establishment, and by
* the dref for each tpdu after that, we have to treat CRs differently
if ( dutype
== CR_TPDU_type
) {
preferred_class
= 1 << hdr
->tpdu_CRclass
;
opt
= hdr
->tpdu_CRoptions
;
WHILE_OPTIONS(P
, hdr
, 1 ) /* { */
switch( vbptr(P
)->tpv_code
) {
vb_getval(P
, u_char
, dusize
);
printf("CR dusize 0x%x\n", dusize
);
/* COS tests: NBS IA (Dec. 1987) Sec. 4.5.2.1 */
if (dusize
< TP_MIN_TPDUSIZE
|| dusize
> TP_MAX_TPDUSIZE
)
dusize
= TP_DFL_TPDUSIZE
;
vb_getval(P
, u_char
, addlopt
);
/* could use vb_getval, but we want to save the loc & len
fsufxloc
= (caddr_t
) &vbptr(P
)->tpv_val
;
fsufxlen
= vbptr(P
)->tpv_len
;
for(j
=0; j
<fsufxlen
; j
++ ) {
printf(" 0x%x. ", *((caddr_t
)(fsufxloc
+j
)) );
/* could use vb_getval, but we want to save the loc & len
lsufxloc
= (caddr_t
) &vbptr(P
)->tpv_val
;
lsufxlen
= vbptr(P
)->tpv_len
;
for(j
=0; j
<lsufxlen
; j
++ ) {
printf(" 0x%x. ", *((u_char
*)(lsufxloc
+j
)) );
vb_getval(P
, u_char
, perf_meas
);
/* not in class 0; 1 octet; in CR_TPDU only */
/* COS tests says if version wrong, use default version!?XXX */
CHECK( (vbval(P
, u_char
) != TP_VERSION
),
E_TP_INV_PVAL
, ts_inv_pval
, setversion
,
(1 + (caddr_t
)&vbptr(P
)->tpv_val
- (caddr_t
)hdr
) );
version
= vbval(P
, u_char
);
vb_getval(P
, u_short
, acktime
);
acktime
= ntohs(acktime
);
acktime
= acktime
/500; /* convert to slowtimo ticks */
acktime
= 2; /* don't allow a bad peer to screw us up */
printf("CR acktime 0x%x\n", acktime
);
static u_char bad_alt_classes
[5] =
{ ~0, ~3, ~5, ~0xf, ~0x1f};
(u_char
*) &(((struct tp_vbp
*)P
)->tpv_val
);
for (i
= ((struct tp_vbp
*)P
)->tpv_len
; i
>0; i
--) {
alt_classes
|= (1<<((*aclass
++)>>4));
CHECK( (bad_alt_classes
[hdr
->tpdu_CRclass
] & alt_classes
),
E_TP_INV_PVAL
, ts_inv_aclass
, respond
,
((caddr_t
)aclass
) - (caddr_t
)hdr
);
printf("alt_classes 0x%x\n", alt_classes
);
printf("param ignored CR_TPDU code= 0x%x\n",
IncStat(ts_param_ignored
);
printf("CR before cksum\n");
CHECK( iso_check_csum(m
, tpdu_len
),
E_TP_INV_PVAL
, ts_bad_csum
, discard
, 0)
printf("CR before cksum\n");
/* } */ END_WHILE_OPTIONS(P
)
/* can't look for a tpcb w/o any called sufx */
error
= E_TP_LENGTH_INVAL
;
register struct tp_pcb
*t
;
for (t
= tp_intercepts
; t
; t
= t
->tp_nextlisten
) {
if (laddr
->sa_family
!= t
->tp_nlproto
->nlp_afamily
)
if ((*t
->tp_nlproto
->nlp_cmpnetaddr
)(
t
->tp_npcb
, laddr
, TP_LOCAL
)) {
for (t
= tp_listeners
; t
; t
= t
->tp_nextlisten
)
if (lsufxlen
== t
->tp_lsuffixlen
&&
bcmp(lsufxloc
, t
->tp_lsuffix
, lsufxlen
) == 0 &&
laddr
->sa_family
== t
->tp_nlproto
->nlp_afamily
)
CHECK(t
== 0, E_TP_NO_SESSION
, ts_inv_sufx
, respond
,
(1 + 2 + (caddr_t
)&hdr
->_tpduf
- (caddr_t
)hdr
))
/* _tpduf is the fixed part; add 2 to get the dref bits of
* the fixed part (can't take the address of a bit field)
printf("checking if dup CR\n");
for (t
= tpcb
->tp_next
; t
!= tpcb
; t
= t
->tp_next
) {
if ((*tpcb
->tp_nlproto
->nlp_cmpnetaddr
)(
t
->tp_npcb
, faddr
, TP_FOREIGN
)) {
printf("duplicate CR discarded\n");
tptrace(TPPTmisc
, "tp_input: tpcb *lsufxloc tpstate",
tpcb
, *lsufxloc
, tpcb
->tp_state
, 0);
* already know that the classes in the CR match at least
* one class implemented, but we don't know yet if they
* include any classes permitted by this server.
printf("HAVE A TPCB 1: 0x%x\n", tpcb
);
"CR: bef CHKS: flags 0x%x class_to_use 0x%x alt 0x%x opt 0x%x tp_class 0x%x\n",
tpcb
->tp_flags
, class_to_use
, alt_classes
, opt
, tpcb
->tp_class
);
/* tpcb->tp_class doesn't include any classes not implemented */
class_to_use
= (preferred_class
& tpcb
->tp_class
);
if( (class_to_use
= preferred_class
& tpcb
->tp_class
) == 0 )
class_to_use
= alt_classes
& tpcb
->tp_class
;
class_to_use
= 1 << tp_mask_to_num(class_to_use
);
tpp
.p_class
= class_to_use
;
tpp
.p_xtd_format
= (opt
& TPO_XTD_FMT
) == TPO_XTD_FMT
;
tpp
.p_xpd_service
= (addlopt
& TPAO_USE_TXPD
) == TPAO_USE_TXPD
;
tpp
.p_use_checksum
= (tpp
.p_class
== TP_CLASS_0
)?0:
(addlopt
& TPAO_NO_CSUM
) == 0;
tpp
.p_use_efc
= (opt
& TPO_USE_EFC
) == TPO_USE_EFC
;
tpp
.p_use_nxpd
= (addlopt
& TPAO_USE_NXPD
) == TPAO_USE_NXPD
;
tpp
.p_use_rcc
= (addlopt
& TPAO_USE_RCC
) == TPAO_USE_RCC
;
tp_consistency(tpcb
, 0 /* not force or strict */, &tpp
) != 0,
E_TP_NEGOT_FAILED
, ts_negotfailed
, respond
,
(1 + 2 + (caddr_t
)&hdr
->_tpdufr
.CRCC
- (caddr_t
)hdr
)
/* ^ more or less the location of class */
"after 1 consist class_to_use class, out, tpconsout",
tpcb
->tp_class
, dgout_routine
, tpcons_output
((class_to_use
== TP_CLASS_0
)&&(dgout_routine
!= tpcons_output
)),
E_TP_NEGOT_FAILED
, ts_negotfailed
, respond
,
(1 + 2 + (caddr_t
)&hdr
->_tpdufr
.CRCC
- (caddr_t
)hdr
)
/* ^ more or less the location of class */
printf("CR: after CRCCCHECKS: tpcb 0x%x, flags 0x%x\n",
e
.ATTR(CR_TPDU
).e_cdt
= hdr
->tpdu_CRcdt
;
if (so
->so_options
& SO_ACCEPTCONN
) {
struct tp_pcb
*parent_tpcb
= tpcb
;
* Create a socket, tpcb, ll pcb, etc.
* for this newborn connection, and fill in all the values.
printf("abt to call tp_newsocket(0x%x, 0x%x, 0x%x, 0x%x)\n",
so
, laddr
, faddr
, cons_channel
);
tp_newsocket(so
, faddr
, cons_channel
,
((tpcb
->tp_netservice
== IN_CLNS
) ? IN_CLNS
:
(dgout_routine
== tpcons_output
)?ISO_CONS
:ISO_CLNS
))
) == (struct socket
*)0 ) {
/* note - even if netservice is IN_CLNS, as far as
* the tp entity is concerned, the only differences
printf("tp_newsocket returns 0\n");
insque(tpcb
, parent_tpcb
);
* Stash the addresses in the net level pcb
* kind of like a pcbconnect() but don't need
* or want all those checks.
(tpcb
->tp_nlproto
->nlp_putnetaddr
)(so
->so_pcb
, faddr
, TP_FOREIGN
);
(tpcb
->tp_nlproto
->nlp_putnetaddr
)(so
->so_pcb
, laddr
, TP_LOCAL
);
/* stash the f suffix in the new tpcb */
bcopy(fsufxloc
, tpcb
->tp_fsuffix
, fsufxlen
);
/* l suffix is already there, unless this is an intercept case */
bcopy(lsufxloc
, tpcb
->tp_lsuffix
, lsufxlen
);
(tpcb
->tp_nlproto
->nlp_putsufx
)
(so
->so_pcb
, fsufxloc
, fsufxlen
, TP_FOREIGN
);
(tpcb
->tp_nlproto
->nlp_putsufx
)
(so
->so_pcb
, lsufxloc
, lsufxlen
, TP_LOCAL
);
if( tpcb
->tp_perf_on
= perf_meas
) { /* assignment */
/* ok, let's create an mbuf for stashing the
* statistics if one doesn't already exist
(void) tp_setup_perf(tpcb
);
/* We've already checked for consistency with the options
* set in tpp, but we couldn't set them earlier because
* we didn't want to change options in the LISTENING tpcb.
* Now we set the options in the new socket's tpcb.
(void) tp_consistency( tpcb
, TP_FORCE
, &tpp
);
if(!tpcb
->tp_use_checksum
)
* Get the maximum transmission unit from the lower layer(s)
* so we can negotiate a reasonable max TPDU size.
(tpcb
->tp_nlproto
->nlp_mtu
)(so
, so
->so_pcb
,
&tpcb
->tp_l_tpdusize
, &tpcb
->tp_tpdusize
, 0);
tpcb
->tp_peer_acktime
= acktime
;
* The following kludge is used to test retransmissions and
* timeout during connection establishment.
if (!tpcb
->tp_cebit_off
) {
tpcb
->tp_win_recv
= tp_start_win
<< 8;
tpcb
->tp_cong_sample
.cs_size
= 0;
CONG_UPDATE_SAMPLE(tpcb
, ce_bit
);
} else if ( dutype
== ER_TPDU_type
) {
* ER TPDUs have to be recognized separately
* because they don't necessarily have a tpcb
* with them and we don't want err out looking for such
* We could put a bunch of little kludges in the
* next section of code so it would avoid references to tpcb
* if dutype == ER_TPDU_type but we don't want code for ERs to
* mess up code for data transfer.
e
.ATTR(ER_TPDU
).e_reason
= (u_char
)hdr
->tpdu_ERreason
;
CHECK (((int)dref
<= 0 || dref
>= N_TPREF
||
(tpcb
= tp_ref
[dref
].tpr_pcb
) == (struct tp_pcb
*) 0 ||
tpcb
->tp_refp
->tpr_state
== REF_FREE
||
tpcb
->tp_refp
->tpr_state
== REF_FROZEN
),
E_TP_MISM_REFS
, ts_inv_dref
, discard
, 0)
/* tpdu type is CC, XPD, XAK, GR, AK, DR, DC, or DT */
* _tpduf is the fixed part; add 2 to get the dref bits of
* the fixed part (can't take the address of a bit field)
extern struct tp_pcb
*cons_chan_to_tpcb();
tpcb
= cons_chan_to_tpcb( cons_channel
);
/* Problem: We may have a legit
* error situation yet we may or may not have
* a correspondence between the tpcb and the vc,
* e.g., TP4cr--> <no dice, respond w/ DR on vc>
* Now it's up to TP to look at the tpdu and do one of:
* confirm(dgm)(cr), confirm(circuit)(cr), reject(cr), or
* nothing, if the circuit is already open (any other tpdu).
/* I don't know about this error value */
CHECK( (tpcb
== (struct tp_pcb
*)0) ,
E_TP_NO_CR_ON_NC
, ts_inv_dref
, respond
,
(1 + 2 + (caddr_t
)&hdr
->_tpduf
- (caddr_t
)hdr
))
printf("tp_input(): X25 NOT CONFIGURED!!\n");
/* we've now made the error reporting thing check for
multiple channels and not close out if more than
CHECK( ((int)dref
<= 0 || dref
>= N_TPREF
) ,
E_TP_MISM_REFS
,ts_inv_dref
, nonx_dref
,
(1 + 2 + (caddr_t
)&hdr
->_tpduf
- (caddr_t
)hdr
))
CHECK( ((tpcb
= tp_ref
[dref
].tpr_pcb
) == (struct tp_pcb
*) 0 ),
E_TP_MISM_REFS
,ts_inv_dref
, nonx_dref
,
(1 + 2 + (caddr_t
)&hdr
->_tpduf
- (caddr_t
)hdr
))
CHECK( (tpcb
->tp_refp
->tpr_state
== REF_FREE
),
E_TP_MISM_REFS
,ts_inv_dref
, nonx_dref
,
(1 + 2 + (caddr_t
)&hdr
->_tpduf
- (caddr_t
)hdr
))
printf("HAVE A TPCB 2: 0x%x\n", tpcb
);
/* causes a DR to be sent for CC; ER for all else */
CHECK( (tpcb
->tp_refp
->tpr_state
== REF_FROZEN
),
(dutype
== CC_TPDU_type
?E_TP_NO_SESSION
:E_TP_MISM_REFS
),
(1 + 2 + (caddr_t
)&hdr
->_tpduf
- (caddr_t
)hdr
))
printf("state of dref %d ok, tpcb 0x%x\n", dref
,tpcb
);
* At this point the state of the dref could be
* FROZEN: tpr_pcb == NULL, has ( reference only) timers
* for example, DC may arrive after the close() has detached
* the tpcb (e.g., if user turned off SO_LISTEN option)
* OPENING : a tpcb exists but no timers yet
* OPEN : tpcb exists & timers are outstanding
CONG_UPDATE_SAMPLE(tpcb
, ce_bit
);
dusize
= tpcb
->tp_tpdusize
;
dutype
= hdr
->tpdu_type
<< 8; /* for the switch below */
WHILE_OPTIONS(P
, hdr
, tpcb
->tp_xtd_format
) /* { */
#define caseof(x,y) case (((x)<<8)+(y))
switch( dutype
| vbptr(P
)->tpv_code
) {
caseof( CC_TPDU_type
, TPP_addl_opt
):
/* not in class 0; 1 octet */
vb_getval(P
, u_char
, addlopt
);
caseof( CC_TPDU_type
, TPP_tpdu_size
):
vb_getval(P
, u_char
, dusize
);
CHECK( (dusize
< TP_MIN_TPDUSIZE
||
dusize
> TP_MAX_TPDUSIZE
|| dusize
> odusize
),
E_TP_INV_PVAL
, ts_inv_pval
, respond
,
(1 + (caddr_t
)&vbptr(P
)->tpv_val
- (caddr_t
)hdr
) )
printf("CC dusize 0x%x\n", dusize
);
caseof( CC_TPDU_type
, TPP_calling_sufx
):
printf("CC calling (local) sufxlen 0x%x\n", lsufxlen
);
lsufxloc
= (caddr_t
) &vbptr(P
)->tpv_val
;
lsufxlen
= vbptr(P
)->tpv_len
;
caseof( CC_TPDU_type
, TPP_acktime
):
/* class 4 only, 2 octets */
vb_getval(P
, u_short
, acktime
);
acktime
= ntohs(acktime
);
acktime
= acktime
/500; /* convert to slowtimo ticks */
caseof( CC_TPDU_type
, TPP_called_sufx
):
fsufxloc
= (caddr_t
) &vbptr(P
)->tpv_val
;
fsufxlen
= vbptr(P
)->tpv_len
;
printf("CC called (foreign) sufx len %d\n", fsufxlen
);
caseof( CC_TPDU_type
, TPP_checksum
):
caseof( DR_TPDU_type
, TPP_checksum
):
caseof( DT_TPDU_type
, TPP_checksum
):
caseof( XPD_TPDU_type
, TPP_checksum
):
if( tpcb
->tp_use_checksum
) {
CHECK( iso_check_csum(m
, tpdu_len
),
E_TP_INV_PVAL
, ts_bad_csum
, discard
, 0)
/* this is different from the above because in the context
* of concat/ sep tpdu_len might not be the same as hdr len
caseof( AK_TPDU_type
, TPP_checksum
):
caseof( XAK_TPDU_type
, TPP_checksum
):
caseof( DC_TPDU_type
, TPP_checksum
):
if( tpcb
->tp_use_checksum
) {
CHECK( iso_check_csum(m
, (int)hdr
->tpdu_li
+ 1),
E_TP_INV_PVAL
, ts_bad_csum
, discard
, 0)
caseof( DR_TPDU_type
, TPP_addl_info
):
/* ignore - its length and meaning are
* user defined and there's no way
* to pass this info to the user anyway
caseof( AK_TPDU_type
, TPP_subseq
):
/* used after reduction of window */
vb_getval(P
, u_short
, subseq
);
printf("AK Subsequence # 0x%x\n", subseq
);
caseof( AK_TPDU_type
, TPP_flow_cntl_conf
):
u_short ysubseq
, ycredit
;
vb_getval(P
, u_int
, ylwe
);
vb_getval(P
, u_short
, ysubseq
);
vb_getval(P
, u_short
, ycredit
);
ysubseq
= ntohs(ysubseq
);
ycredit
= ntohs(ycredit
);
printf("AK FCC lwe 0x%x, subseq 0x%x, cdt 0x%x\n",
printf("param ignored dutype 0x%x, code 0x%x\n",
dutype
, vbptr(P
)->tpv_code
);
tptrace(TPPTmisc
, "param ignored dutype code ",
dutype
, vbptr(P
)->tpv_code
,0,0);
IncStat(ts_param_ignored
);
/* } */ END_WHILE_OPTIONS(P
)
/* NOTE: the variable dutype has been shifted left! */
switch( hdr
->tpdu_type
) {
/* If CC comes back with an unacceptable class
* respond with a DR or ER
opt
= hdr
->tpdu_CCoptions
; /* 1 byte */
tpp
.p_class
= (1<<hdr
->tpdu_CCclass
);
tpp
.p_dont_change_params
= 0;
tpp
.p_xtd_format
= (opt
& TPO_XTD_FMT
) == TPO_XTD_FMT
;
tpp
.p_xpd_service
= (addlopt
& TPAO_USE_TXPD
) == TPAO_USE_TXPD
;
tpp
.p_use_checksum
= (addlopt
& TPAO_NO_CSUM
) == 0;
tpp
.p_use_efc
= (opt
& TPO_USE_EFC
) == TPO_USE_EFC
;
tpp
.p_use_nxpd
= (addlopt
& TPAO_USE_NXPD
) == TPAO_USE_NXPD
;
tpp
.p_use_rcc
= (addlopt
& TPAO_USE_RCC
) == TPAO_USE_RCC
;
tp_consistency(tpcb
, TP_FORCE
, &tpp
) != 0,
E_TP_NEGOT_FAILED
, ts_negotfailed
, respond
,
(1 + 2 + (caddr_t
)&hdr
->_tpdufr
.CRCC
- (caddr_t
)hdr
)
/* ^ more or less the location of class */
"after 1 consist class, out, tpconsout",
tpcb
->tp_class
, dgout_routine
, tpcons_output
, 0
((class_to_use
== TP_CLASS_0
)&&
(dgout_routine
!= tpcons_output
)),
E_TP_NEGOT_FAILED
, ts_negotfailed
, respond
,
(1 + 2 + (caddr_t
)&hdr
->_tpdufr
.CRCC
- (caddr_t
)hdr
)
/* ^ more or less the location of class */
if (tpcb
->tp_netservice
== ISO_CONS
&&
class_to_use
== TP_CLASS_0
) {
struct isopcb
*isop
= (struct isopcb
*)tpcb
->tp_npcb
;
struct pklcd
*lcp
= (struct pklcd
*)isop
->isop_chan
;
lcp
->lcd_flags
&= ~X25_DG_CIRCUIT
;
if( ! tpcb
->tp_use_checksum
)
tptrace(TPPTmisc
, "after CC class flags dusize CCclass",
tpcb
->tp_class
, tpcb
->tp_flags
, tpcb
->tp_tpdusize
,
* Get the maximum transmission unit from the lower layer(s)
* so we can decide how large a TPDU size to negotiate.
* It would be nice if the arguments to this
(tpcb
->tp_nlproto
->nlp_mtu
)(tpcb
->tp_sock
, tpcb
->tp_sock
->so_pcb
,
&tpcb
->tp_l_tpdusize
, &tpcb
->tp_tpdusize
, 0);
/* if called or calling suffices appeared on the CC,
* they'd better jive with what's in the pcb
CHECK( ((tpcb
->tp_fsuffixlen
!= fsufxlen
) ||
bcmp(fsufxloc
, tpcb
->tp_fsuffix
, fsufxlen
)),
E_TP_INV_PVAL
,ts_inv_sufx
, respond
,
(1+fsufxloc
- (caddr_t
)hdr
))
CHECK( ((tpcb
->tp_lsuffixlen
!= lsufxlen
) ||
bcmp(lsufxloc
, tpcb
->tp_lsuffix
, lsufxlen
)),
E_TP_INV_PVAL
,ts_inv_sufx
, respond
,
(1+lsufxloc
- (caddr_t
)hdr
))
e
.ATTR(CC_TPDU
).e_sref
= sref
;
e
.ATTR(CC_TPDU
).e_cdt
= hdr
->tpdu_CCcdt
;
if (sref
!= tpcb
->tp_fref
)
printf("INPUT: inv sufx DCsref 0x%x, tp_fref 0x%x\n",
CHECK( (sref
!= tpcb
->tp_fref
),
E_TP_MISM_REFS
, ts_inv_sufx
, discard
,
(1 + (caddr_t
)&hdr
->tpdu_DCsref
- (caddr_t
)hdr
))
tptrace(TPPTmisc
, "DR recvd", hdr
->tpdu_DRreason
, 0, 0, 0);
if (sref
!= tpcb
->tp_fref
) {
printf("INPUT: inv sufx DRsref 0x%x tp_fref 0x%x\n",
CHECK( (sref
!= 0 && sref
!= tpcb
->tp_fref
&&
tpcb
->tp_state
!= TP_CRSENT
),
(TP_ERROR_SNDC
| E_TP_MISM_REFS
),ts_inv_sufx
, respond
,
(1 + (caddr_t
)&hdr
->tpdu_DRsref
- (caddr_t
)hdr
))
e
.ATTR(DR_TPDU
).e_reason
= hdr
->tpdu_DRreason
;
e
.ATTR(DR_TPDU
).e_sref
= (u_short
)sref
;
tptrace(TPPTmisc
, "ER recvd", hdr
->tpdu_ERreason
,0,0,0);
e
.ATTR(ER_TPDU
).e_reason
= hdr
->tpdu_ERreason
;
e
.ATTR(AK_TPDU
).e_subseq
= subseq
;
e
.ATTR(AK_TPDU
).e_fcc_present
= fcc_present
;
if (tpcb
->tp_xtd_format
) {
seqeotX
.s_seqeot
= ntohl(hdr
->tpdu_seqeotX
);
e
.ATTR(AK_TPDU
).e_seq
= seqeotX
.s_seq
;
e
.ATTR(AK_TPDU
).e_cdt
= ntohs(hdr
->tpdu_AKcdtX
);
e
.ATTR(AK_TPDU
).e_cdt
= hdr
->tpdu_AKcdtX
;
e
.ATTR(AK_TPDU
).e_seq
= hdr
->tpdu_AKseqX
;
e
.ATTR(AK_TPDU
).e_cdt
= hdr
->tpdu_AKcdt
;
e
.ATTR(AK_TPDU
).e_seq
= hdr
->tpdu_AKseq
;
tptrace(TPPTmisc
, "AK recvd seq cdt subseq fcc_pres",
e
.ATTR(AK_TPDU
).e_seq
, e
.ATTR(AK_TPDU
).e_cdt
,
IncPStat(tpcb
, tps_AK_rcvd
);
if (tpcb
->tp_xtd_format
) {
seqeotX
.s_seqeot
= ntohl(hdr
->tpdu_seqeotX
);
e
.ATTR(XAK_TPDU
).e_seq
= seqeotX
.s_seq
;
e
.ATTR(XAK_TPDU
).e_seq
= hdr
->tpdu_XAKseqX
;
e
.ATTR(XAK_TPDU
).e_seq
= hdr
->tpdu_XAKseq
;
IncPStat(tpcb
, tps_XAK_rcvd
);
if (tpcb
->tp_xtd_format
) {
seqeotX
.s_seqeot
= ntohl(hdr
->tpdu_seqeotX
);
e
.ATTR(XPD_TPDU
).e_seq
= seqeotX
.s_seq
;
e
.ATTR(XPD_TPDU
).e_seq
= hdr
->tpdu_XPDseqX
;
e
.ATTR(XPD_TPDU
).e_seq
= hdr
->tpdu_XPDseq
;
IncPStat(tpcb
, tps_XPD_rcvd
);
{ /* the y option will cause occasional packets to be dropped.
* A little crude but it works.
if(time
.tv_usec
& 0x4 && hdr
->tpdu_DTseq
& 0x1) {
if (tpcb
->tp_class
== TP_CLASS_0
) {
e
.ATTR(DT_TPDU
).e_seq
= 0; /* actually don't care */
e
.ATTR(DT_TPDU
).e_eot
= (((struct tp0du
*)hdr
)->tp0du_eot
);
} else if (tpcb
->tp_xtd_format
) {
seqeotX
.s_seqeot
= ntohl(hdr
->tpdu_seqeotX
);
e
.ATTR(DT_TPDU
).e_seq
= seqeotX
.s_seq
;
e
.ATTR(DT_TPDU
).e_eot
= seqeotX
.s_eot
;
e
.ATTR(DT_TPDU
).e_seq
= hdr
->tpdu_DTseqX
;
e
.ATTR(DT_TPDU
).e_eot
= hdr
->tpdu_DTeotX
;
e
.ATTR(DT_TPDU
).e_seq
= hdr
->tpdu_DTseq
;
e
.ATTR(DT_TPDU
).e_eot
= hdr
->tpdu_DTeot
;
if(e
.ATTR(DT_TPDU
).e_eot
)
IncPStat(tpcb
, tps_DT_rcvd
);
tp_indicate(T_DISCONNECT
, tpcb
, ECONNABORTED
);
/* this should NEVER happen because there is a
* check for dutype well above here
error
= E_TP_INV_TPDU
; /* causes an ER */
printf("INVALID dutype 0x%x\n", hdr
->tpdu_type
);
/* peel off the tp header;
* remember that the du_li doesn't count itself.
* This may leave us w/ an empty mbuf at the front of a chain.
* We can't just throw away the empty mbuf because hdr still points
* into the mbuf's data area and we're still using hdr (the tpdu header)
m
->m_len
-= ((int)hdr
->tpdu_li
+ 1);
m
->m_data
+= ((int)hdr
->tpdu_li
+ 1);
int max
= tpdu_info
[ hdr
->tpdu_type
] [TP_MAX_DATA_INDEX
];
int datalen
= tpdu_len
- hdr
->tpdu_li
- 1, mbtype
= MT_DATA
;
struct tp_disc_reason dr
;
CHECK( (max
&& datalen
> max
), E_TP_LENGTH_INVAL
,
ts_inv_length
, respond
, (max
+ hdr
->tpdu_li
+ 1) );
switch( hdr
->tpdu_type
) {
c_hdr
.cmsg_type
= TPOPT_CONN_DATA
;
c_hdr
.cmsg_type
= TPOPT_CFRM_DATA
;
x
.dr
.dr_hdr
.cmsg_len
= sizeof(x
) - sizeof(c_hdr
);
x
.dr
.dr_hdr
.cmsg_type
= TPOPT_DISC_REASON
;
x
.dr
.dr_hdr
.cmsg_level
= SOL_TRANSPORT
;
x
.dr
.dr_reason
= hdr
->tpdu_DRreason
;
c_hdr
.cmsg_type
= TPOPT_DISC_DATA
;
datalen
+= sizeof(c_hdr
);
c_hdr
.cmsg_len
= datalen
;
c_hdr
.cmsg_level
= SOL_TRANSPORT
;
MGET(n
, M_DONTWAIT
, MT_DATA
);
{m_freem(m
); m
= 0; datalen
= 0; goto invoke
; }
if (hdr
->tpdu_type
== DR_TPDU_type
) {
datalen
+= sizeof(x
) - sizeof(c_hdr
);
bcopy((caddr_t
)&x
, mtod(n
, caddr_t
), n
->m_len
= sizeof(x
));
bcopy((caddr_t
)&c_hdr
, mtod(n
, caddr_t
),
n
->m_len
= sizeof(c_hdr
));
if (mbtype
!= MT_CONTROL
)
for (n
= m
; n
; n
= n
->m_next
) {
e
.ATTR(DT_TPDU
).e_datalen
= datalen
;
e
.ATTR(DT_TPDU
).e_data
= m
;
"ERROR in tp_input! hdr->tpdu_type 0x%x takes_data 0x%x m 0x%x\n",
hdr
->tpdu_type
, takes_data
, m
);
/* prevent m_freem() after tp_driver() from throwing it all away */
printf( "tp_input: before driver, state 0x%x event 0x%x m 0x%x",
tpcb
->tp_state
, e
.ev_number
, m
);
printf(" e.e_data 0x%x\n", e
.ATTR(DT_TPDU
).e_data
);
printf("takes_data 0x%x m_len 0x%x, tpdu_len 0x%x\n",
takes_data
, (m
==MNULL
)?0:m
->m_len
, tpdu_len
);
error
= tp_driver(tpcb
, &e
);
ASSERT(tpcb
!= (struct tp_pcb
*)0);
ASSERT(tpcb
->tp_sock
!= (struct socket
*)0);
if( tpcb
->tp_sock
->so_error
== 0 )
tpcb
->tp_sock
->so_error
= error
;
/* Kludge to keep the state tables under control (adding
* data on connect & disconnect & freeing the mbuf containing
* the data would have exploded the tables and made a big mess ).
m
= e
.ATTR(CC_TPDU
).e_data
; /* same field for all three dutypes */
printf("after driver, restoring m to 0x%x, takes_data 0x%x\n",
/* Concatenated sequences are terminated by any tpdu that
* carries data: CR, CC, DT, XPD, DR.
* All other tpdu types may be concatenated: AK, XAK, DC, ER.
* we already peeled off the prev. tp header so
* we can just pull up some more and repeat
if( m
= tp_inputprep(m
) ) {
hdr
= mtod(m
, struct tpdu
*);
printf("tp_input @ separate: hdr 0x%x size %d m 0x%x\n",
hdr
, (int) hdr
->tpdu_li
+ 1, m
);
dump_mbuf(m
, "tp_input after driver, at separate");
printf("tp_input : m_freem(0x%x)\n", m
);
printf("tp_input : after m_freem 0x%x\n", m
);
/* class 4: drop the tpdu */
/* class 2,0: Should drop the net connection, if you can figure out
* to which connection it applies
printf("tp_input DISCARD\n");
tptrace(TPPTmisc
, "tp_input DISCARD m", m
,0,0,0);
/* error = E_TP_MISM_REFS; */
printf("RESPOND: error 0x%x, errlen 0x%x\n", error
, errlen
);
tptrace(TPPTmisc
, "tp_input RESPOND m error sref", m
, error
, sref
, 0);
(void) tp_error_emit(error
, (u_long
)sref
, (struct sockaddr_iso
*)faddr
,
(struct sockaddr_iso
*)laddr
, m
, errlen
, tpcb
,
(int)cons_channel
, dgout_routine
);
printf("tp_input after error_emit\n");
* tp_emit() and tp_sbsend()
* TP needs to know the header size so it can figure out how
* much data to put in each tpdu.
* FUNCTION, ARGUMENTS, and RETURN VALUE:
* For a given connection, represented by (tpcb), and
* tpdu type (dutype), return the size of a tp header.
* RETURNS: the expected size of the heade in bytesr
* NOTES: It would be nice if it got the network header size as well.
tp_headersize(dutype
, tpcb
)
tptrace(TPPTmisc
, "tp_headersize dutype class xtd_format",
dutype
, tpcb
->tp_class
, tpcb
->tp_xtd_format
, 0);
if( !( (tpcb
->tp_class
== TP_CLASS_0
) ||
(tpcb
->tp_class
== TP_CLASS_4
) ||
(dutype
== DR_TPDU_type
) ||
(dutype
== CR_TPDU_type
) )) {
printf("tp_headersize:dutype 0x%x, class 0x%x",
/* TODO: identify this and GET RID OF IT */
ASSERT( (tpcb
->tp_class
== TP_CLASS_0
) ||
(tpcb
->tp_class
== TP_CLASS_4
) ||
(dutype
== DR_TPDU_type
) ||
(dutype
== CR_TPDU_type
) );
if( tpcb
->tp_class
== TP_CLASS_0
) {
size
= tpdu_info
[ dutype
] [TP_LEN_CLASS_0_INDEX
];
size
= tpdu_info
[ dutype
] [tpcb
->tp_xtd_format
];
/* caller must get network level header size separately */