Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sys/netiso/tp_driver.c

998 lines
25 KiB
C
Raw Blame History

/* $NetBSD: tp_driver.c,v 1.6 1994/06/29 06:40:01 cgd Exp $ */
#define _XEBEC_PG static
#include "tp_states.h"
static struct act_ent {
int a_newstate;
int a_action;
} statetable[] = { {0,0},
#include "tp_states.init"
};
/* @(#)tp.trans 8.1 (Berkeley) 6/10/93 */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/mbuf.h>
#include <sys/time.h>
#include <sys/errno.h>
#include <netiso/tp_param.h>
#include <netiso/tp_stat.h>
#include <netiso/tp_pcb.h>
#include <netiso/tp_tpdu.h>
#include <netiso/argo_debug.h>
#include <netiso/tp_trace.h>
#include <netiso/iso_errno.h>
#include <netiso/tp_seq.h>
#include <netiso/cons.h>
#define DRIVERTRACE TPPTdriver
#define sbwakeup(sb) sowakeup(p->tp_sock, sb);
#define MCPY(d, w) (d ? m_copym(d, 0, (int)M_COPYALL, w): 0)
static trick_hc = 1;
int tp_emit(),
tp_goodack(), tp_goodXack(),
tp_stash()
;
void tp_indicate(), tp_getoptions(),
tp_soisdisconnecting(), tp_soisdisconnected(),
tp_recycle_tsuffix(),
#ifdef TP_DEBUG_TIMERS
tp_etimeout(), tp_euntimeout(),
tp_ctimeout(), tp_cuntimeout(),
tp_ctimeout_MIN(),
#endif
tp_freeref(), tp_detach(),
tp0_stash(), tp0_send(),
tp_netcmd(), tp_send()
;
typedef struct tp_pcb tpcb_struct;
typedef tpcb_struct tp_PCB_;
#include "tp_events.h"
_XEBEC_PG int _Xebec_action(a,e,p)
int a;
struct tp_event *e;
tp_PCB_ *p;
{
switch(a) {
case -1: return tp_protocol_error(e,p);
case 0x1:
{
(void) tp_emit(DC_TPDU_type, p, 0, 0, MNULL);
}
break;
case 0x2:
{
# ifdef TP_DEBUG
if( e->ev_number != AK_TPDU )
printf("TPDU 0x%x in REFWAIT!!!!\n", e->ev_number);
# endif TP_DEBUG
}
break;
case 0x3:
{
/* oh, man is this grotesque or what? */
(void) tp_goodack(p, e->ev_union.EV_AK_TPDU.e_cdt, e->ev_union.EV_AK_TPDU.e_seq, e->ev_union.EV_AK_TPDU.e_subseq);
/* but it's necessary because this pseudo-ack may happen
* before the CC arrives, but we HAVE to adjust the
* snduna as a result of the ack, WHENEVER it arrives
*/
}
break;
case 0x4:
{
tp_detach(p);
}
break;
case 0x5:
{
p->tp_refstate = REF_OPEN; /* has timers ??? */
}
break;
case 0x6:
{
IFTRACE(D_CONN)
tptrace(TPPTmisc, "CR datalen data", e->ev_union.EV_CR_TPDU.e_datalen, e->ev_union.EV_CR_TPDU.e_data,0,0);
ENDTRACE
IFDEBUG(D_CONN)
printf("CR datalen 0x%x data 0x%x", e->ev_union.EV_CR_TPDU.e_datalen, e->ev_union.EV_CR_TPDU.e_data);
ENDDEBUG
p->tp_refstate = REF_OPEN; /* has timers */
p->tp_fcredit = e->ev_union.EV_CR_TPDU.e_cdt;
if (e->ev_union.EV_CR_TPDU.e_datalen > 0) {
/* n/a for class 0 */
ASSERT(p->tp_Xrcv.sb_cc == 0);
sbappendrecord(&p->tp_Xrcv, e->ev_union.EV_CR_TPDU.e_data);
e->ev_union.EV_CR_TPDU.e_data = MNULL;
}
}
break;
case 0x7:
{
IncStat(ts_tp0_conn);
IFTRACE(D_CONN)
tptrace(TPPTmisc, "Confiming", p, 0,0,0);
ENDTRACE
IFDEBUG(D_CONN)
printf("Confirming connection: p" );
ENDDEBUG
soisconnected(p->tp_sock);
(void) tp_emit(CC_TPDU_type, p, 0,0, MNULL) ;
p->tp_fcredit = 1;
}
break;
case 0x8:
{
IncStat(ts_tp4_conn); /* even though not quite open */
IFTRACE(D_CONN)
tptrace(TPPTmisc, "Confiming", p, 0,0,0);
ENDTRACE
IFDEBUG(D_CONN)
printf("Confirming connection: p" );
ENDDEBUG
tp_getoptions(p);
soisconnecting(p->tp_sock);
if ((p->tp_rx_strat & TPRX_FASTSTART) && (p->tp_fcredit > 0))
p->tp_cong_win = p->tp_fcredit * p->tp_l_tpdusize;
p->tp_retrans = p->tp_Nretrans;
tp_ctimeout(p, TM_retrans, (int)p->tp_cc_ticks);
}
break;
case 0x9:
{
IFDEBUG(D_CONN)
printf("event: CR_TPDU emit CC failed done " );
ENDDEBUG
soisdisconnected(p->tp_sock);
tp_recycle_tsuffix(p);
tp_freeref(p->tp_lref);
tp_detach(p);
}
break;
case 0xa:
{
int error;
struct mbuf *data = MNULL;
IFTRACE(D_CONN)
tptrace(TPPTmisc, "T_CONN_req flags ucddata", (int)p->tp_flags,
p->tp_ucddata, 0, 0);
ENDTRACE
data = MCPY(p->tp_ucddata, M_WAIT);
if (data) {
IFDEBUG(D_CONN)
printf("T_CONN_req.trans m_copy cc 0x%x\n",
p->tp_ucddata);
dump_mbuf(data, "sosnd @ T_CONN_req");
ENDDEBUG
}
if (error = tp_emit(CR_TPDU_type, p, 0, 0, data) )
return error; /* driver WON'T change state; will return error */
p->tp_refstate = REF_OPEN; /* has timers */
if(p->tp_class != TP_CLASS_0) {
p->tp_retrans = p->tp_Nretrans;
tp_ctimeout(p, TM_retrans, (int)p->tp_cr_ticks);
}
}
break;
case 0xb:
{
sbflush(&p->tp_Xrcv); /* purge non-delivered data data */
if (e->ev_union.EV_DR_TPDU.e_datalen > 0) {
sbappendrecord(&p->tp_Xrcv, e->ev_union.EV_DR_TPDU.e_data);
e->ev_union.EV_DR_TPDU.e_data = MNULL;
}
if (p->tp_state == TP_OPEN)
tp_indicate(T_DISCONNECT, p, 0);
else {
int so_error = ECONNREFUSED;
if (e->ev_union.EV_DR_TPDU.e_reason != (E_TP_NO_SESSION ^ TP_ERROR_MASK) &&
e->ev_union.EV_DR_TPDU.e_reason != (E_TP_NO_CR_ON_NC ^ TP_ERROR_MASK) &&
e->ev_union.EV_DR_TPDU.e_reason != (E_TP_REF_OVERFLOW ^ TP_ERROR_MASK))
so_error = ECONNABORTED;
tp_indicate(T_DISCONNECT, p, so_error);
}
tp_soisdisconnected(p);
if (p->tp_class != TP_CLASS_0) {
if (p->tp_state == TP_OPEN ) {
tp_euntimeout(p, TM_data_retrans); /* all */
tp_cuntimeout(p, TM_retrans);
tp_cuntimeout(p, TM_inact);
tp_cuntimeout(p, TM_sendack);
p->tp_flags &= ~TPF_DELACK;
}
tp_cuntimeout(p, TM_retrans);
if( e->ev_union.EV_DR_TPDU.e_sref != 0 )
(void) tp_emit(DC_TPDU_type, p, 0, 0, MNULL);
}
}
break;
case 0xc:
{
if( e->ev_union.EV_DR_TPDU.e_sref != 0 )
(void) tp_emit(DC_TPDU_type, p, 0, 0, MNULL);
/* reference timer already set - reset it to be safe (???) */
tp_euntimeout(p, TM_reference); /* all */
tp_etimeout(p, TM_reference, (int)p->tp_refer_ticks);
}
break;
case 0xd:
{
tp_cuntimeout(p, TM_retrans);
tp_indicate(ER_TPDU, p, e->ev_union.EV_ER_TPDU.e_reason);
tp_soisdisconnected(p);
}
break;
case 0xe:
{
tp_cuntimeout(p, TM_retrans);
tp_soisdisconnected(p);
}
break;
case 0xf:
{
tp_indicate(ER_TPDU, p, e->ev_union.EV_ER_TPDU.e_reason);
tp_cuntimeout(p, TM_retrans);
tp_soisdisconnected(p);
}
break;
case 0x10:
{
tp_cuntimeout(p, TM_retrans);
tp_soisdisconnected(p);
}
break;
case 0x11:
{ /* don't ask me why we have to do this - spec says so */
(void) tp_emit(DR_TPDU_type, p, 0, E_TP_NO_SESSION, MNULL);
/* don't bother with retransmissions of the DR */
}
break;
case 0x12:
{
tp_soisdisconnecting(p->tp_sock);
tp_indicate(ER_TPDU, p, e->ev_union.EV_ER_TPDU.e_reason);
tp_soisdisconnected(p);
tp_netcmd( p, CONN_CLOSE );
}
break;
case 0x13:
{
if (p->tp_state == TP_OPEN) {
tp_euntimeout(p, TM_data_retrans); /* all */
tp_cuntimeout(p, TM_inact);
tp_cuntimeout(p, TM_sendack);
}
tp_soisdisconnecting(p->tp_sock);
tp_indicate(ER_TPDU, p, e->ev_union.EV_ER_TPDU.e_reason);
p->tp_retrans = p->tp_Nretrans;
tp_ctimeout(p, TM_retrans, (int)p->tp_dr_ticks);
(void) tp_emit(DR_TPDU_type, p, 0, E_TP_PROTO_ERR, MNULL);
}
break;
case 0x14:
{
tp_cuntimeout(p, TM_retrans);
IncStat(ts_tp0_conn);
p->tp_fcredit = 1;
soisconnected(p->tp_sock);
}
break;
case 0x15:
{
IFDEBUG(D_CONN)
printf("trans: CC_TPDU in CRSENT state flags 0x%x\n",
(int)p->tp_flags);
ENDDEBUG
IncStat(ts_tp4_conn);
p->tp_fref = e->ev_union.EV_CC_TPDU.e_sref;
p->tp_fcredit = e->ev_union.EV_CC_TPDU.e_cdt;
if ((p->tp_rx_strat & TPRX_FASTSTART) && (e->ev_union.EV_CC_TPDU.e_cdt > 0))
p->tp_cong_win = e->ev_union.EV_CC_TPDU.e_cdt * p->tp_l_tpdusize;
tp_getoptions(p);
tp_cuntimeout(p, TM_retrans);
if (p->tp_ucddata) {
IFDEBUG(D_CONN)
printf("dropping user connect data cc 0x%x\n",
p->tp_ucddata->m_len);
ENDDEBUG
m_freem(p->tp_ucddata);
p->tp_ucddata = 0;
}
soisconnected(p->tp_sock);
if (e->ev_union.EV_CC_TPDU.e_datalen > 0) {
ASSERT(p->tp_Xrcv.sb_cc == 0); /* should be empty */
sbappendrecord(&p->tp_Xrcv, e->ev_union.EV_CC_TPDU.e_data);
e->ev_union.EV_CC_TPDU.e_data = MNULL;
}
(void) tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 0, MNULL);
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
}
break;
case 0x16:
{
struct mbuf *data = MNULL;
int error;
IncStat(ts_retrans_cr);
p->tp_cong_win = 1 * p->tp_l_tpdusize;
data = MCPY(p->tp_ucddata, M_NOWAIT);
if(p->tp_ucddata) {
IFDEBUG(D_CONN)
printf("TM_retrans.trans m_copy cc 0x%x\n", data);
dump_mbuf(p->tp_ucddata, "sosnd @ TM_retrans");
ENDDEBUG
if( data == MNULL )
return ENOBUFS;
}
p->tp_retrans --;
if( error = tp_emit(CR_TPDU_type, p, 0, 0, data) ) {
p->tp_sock->so_error = error;
}
tp_ctimeout(p, TM_retrans, (int)p->tp_cr_ticks);
}
break;
case 0x17:
{
IncStat(ts_conn_gaveup);
p->tp_sock->so_error = ETIMEDOUT;
tp_indicate(T_DISCONNECT, p, ETIMEDOUT);
tp_soisdisconnected(p);
}
break;
case 0x18:
{
int error;
struct mbuf *data = MCPY(p->tp_ucddata, M_WAIT);
if( error = tp_emit(CC_TPDU_type, p, 0, 0, data) ) {
p->tp_sock->so_error = error;
}
p->tp_retrans = p->tp_Nretrans;
tp_ctimeout(p, TM_retrans, (int)p->tp_cc_ticks);
}
break;
case 0x19:
{
int doack;
/*
* Get rid of any confirm or connect data, so that if we
* crash or close, it isn't thought of as disconnect data.
*/
if (p->tp_ucddata) {
m_freem(p->tp_ucddata);
p->tp_ucddata = 0;
}
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
tp_cuntimeout(p, TM_retrans);
soisconnected(p->tp_sock);
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
/* see also next 2 transitions, if you make any changes */
doack = tp_stash(p, e);
IFDEBUG(D_DATA)
printf("tp_stash returns %d\n",doack);
ENDDEBUG
if (doack) {
(void) tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 0, MNULL );
tp_ctimeout(p, TM_sendack, (int)p->tp_keepalive_ticks);
} else
tp_ctimeout( p, TM_sendack, (int)p->tp_sendack_ticks);
IFDEBUG(D_DATA)
printf("after stash calling sbwakeup\n");
ENDDEBUG
}
break;
case 0x1a:
{
tp0_stash(p, e);
sbwakeup( &p->tp_sock->so_rcv );
IFDEBUG(D_DATA)
printf("after stash calling sbwakeup\n");
ENDDEBUG
}
break;
case 0x1b:
{
int doack; /* tells if we must ack immediately */
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
sbwakeup( &p->tp_sock->so_rcv );
doack = tp_stash(p, e);
IFDEBUG(D_DATA)
printf("tp_stash returns %d\n",doack);
ENDDEBUG
if(doack)
(void) tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 0, MNULL );
else
tp_ctimeout_MIN( p, TM_sendack, (int)p->tp_sendack_ticks);
IFDEBUG(D_DATA)
printf("after stash calling sbwakeup\n");
ENDDEBUG
}
break;
case 0x1c:
{
IFTRACE(D_DATA)
tptrace(TPPTmisc, "NIW seq rcvnxt lcredit ",
e->ev_union.EV_DT_TPDU.e_seq, p->tp_rcvnxt, p->tp_lcredit, 0);
ENDTRACE
IncStat(ts_dt_niw);
m_freem(e->ev_union.EV_DT_TPDU.e_data);
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
(void) tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 0, MNULL );
}
break;
case 0x1d:
{
if (p->tp_ucddata) {
m_freem(p->tp_ucddata);
p->tp_ucddata = 0;
}
(void) tp_goodack(p, e->ev_union.EV_AK_TPDU.e_cdt, e->ev_union.EV_AK_TPDU.e_seq, e->ev_union.EV_AK_TPDU.e_subseq);
tp_cuntimeout(p, TM_retrans);
soisconnected(p->tp_sock);
IFTRACE(D_CONN)
struct socket *so = p->tp_sock;
tptrace(TPPTmisc,
"called sosiconn: so so_state rcv.sb_sel rcv.sb_flags",
so, so->so_state, so->so_rcv.sb_sel, so->so_rcv.sb_flags);
tptrace(TPPTmisc,
"called sosiconn 2: so_qlen so_error so_rcv.sb_cc so_head",
so->so_qlen, so->so_error, so->so_rcv.sb_cc, so->so_head);
ENDTRACE
tp_ctimeout(p, TM_sendack, (int)p->tp_keepalive_ticks);
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
}
break;
case 0x1e:
{
if( p->tp_state == TP_AKWAIT ) {
if (p->tp_ucddata) {
m_freem(p->tp_ucddata);
p->tp_ucddata = 0;
}
tp_cuntimeout(p, TM_retrans);
soisconnected(p->tp_sock);
tp_ctimeout(p, TM_sendack, (int)p->tp_keepalive_ticks);
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
}
IFTRACE(D_XPD)
tptrace(TPPTmisc, "XPD tpdu accepted Xrcvnxt, e_seq datalen m_len\n",
p->tp_Xrcvnxt,e->ev_union.EV_XPD_TPDU.e_seq, e->ev_union.EV_XPD_TPDU.e_datalen, e->ev_union.EV_XPD_TPDU.e_data->m_len);
ENDTRACE
p->tp_sock->so_state |= SS_RCVATMARK;
e->ev_union.EV_XPD_TPDU.e_data->m_flags |= M_EOR;
sbinsertoob(&p->tp_Xrcv, e->ev_union.EV_XPD_TPDU.e_data);
IFDEBUG(D_XPD)
dump_mbuf(e->ev_union.EV_XPD_TPDU.e_data, "XPD TPDU: tp_Xrcv");
ENDDEBUG
tp_indicate(T_XDATA, p, 0);
sbwakeup( &p->tp_Xrcv );
(void) tp_emit(XAK_TPDU_type, p, p->tp_Xrcvnxt, 0, MNULL);
SEQ_INC(p, p->tp_Xrcvnxt);
}
break;
case 0x1f:
{
if( p->tp_Xrcv.sb_cc == 0 ) {
/* kludge for select(): */
/* p->tp_sock->so_state &= ~SS_OOBAVAIL; */
}
}
break;
case 0x20:
{
IFTRACE(D_XPD)
tptrace(TPPTmisc, "XPD tpdu niw (Xrcvnxt, e_seq) or not cdt (cc)\n",
p->tp_Xrcvnxt, e->ev_union.EV_XPD_TPDU.e_seq, p->tp_Xrcv.sb_cc , 0);
ENDTRACE
if( p->tp_Xrcvnxt != e->ev_union.EV_XPD_TPDU.e_seq )
IncStat(ts_xpd_niw);
if( p->tp_Xrcv.sb_cc ) {
/* might as well kick 'em again */
tp_indicate(T_XDATA, p, 0);
IncStat(ts_xpd_dup);
}
m_freem(e->ev_union.EV_XPD_TPDU.e_data);
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
/* don't send an xack because the xak gives "last one received", not
* "next one i expect" (dumb)
*/
}
break;
case 0x21:
{
struct socket *so = p->tp_sock;
/* detach from parent socket so it can finish closing */
if (so->so_head) {
if (!soqremque(so, 0) && !soqremque(so, 1))
panic("tp: T_DETACH");
so->so_head = 0;
}
tp_soisdisconnecting(p->tp_sock);
tp_netcmd( p, CONN_CLOSE);
tp_soisdisconnected(p);
}
break;
case 0x22:
{
struct socket *so = p->tp_sock;
struct mbuf *data = MNULL;
/* detach from parent socket so it can finish closing */
if (so->so_head) {
if (!soqremque(so, 0) && !soqremque(so, 1))
panic("tp: T_DETACH");
so->so_head = 0;
}
if (p->tp_state != TP_CLOSING) {
tp_soisdisconnecting(p->tp_sock);
data = MCPY(p->tp_ucddata, M_NOWAIT);
(void) tp_emit(DR_TPDU_type, p, 0, E_TP_NORMAL_DISC, data);
p->tp_retrans = p->tp_Nretrans;
tp_ctimeout(p, TM_retrans, (int)p->tp_dr_ticks);
}
}
break;
case 0x23:
{
tp_soisdisconnecting(p->tp_sock);
tp_netcmd( p, CONN_CLOSE);
tp_soisdisconnected(p);
}
break;
case 0x24:
{
struct mbuf *data = MCPY(p->tp_ucddata, M_WAIT);
if(p->tp_state == TP_OPEN) {
tp_euntimeout(p, TM_data_retrans); /* all */
tp_cuntimeout(p, TM_inact);
tp_cuntimeout(p, TM_sendack);
p->tp_flags &= ~TPF_DELACK;
}
if (data) {
IFDEBUG(D_CONN)
printf("T_DISC_req.trans tp_ucddata 0x%x\n",
p->tp_ucddata);
dump_mbuf(data, "ucddata @ T_DISC_req");
ENDDEBUG
}
tp_soisdisconnecting(p->tp_sock);
p->tp_retrans = p->tp_Nretrans;
tp_ctimeout(p, TM_retrans, (int)p->tp_dr_ticks);
if( trick_hc )
return tp_emit(DR_TPDU_type, p, 0, e->ev_union.EV_T_DISC_req.e_reason, data);
}
break;
case 0x25:
{
int error;
struct mbuf *data = MCPY(p->tp_ucddata, M_WAIT);
IncStat(ts_retrans_cc);
p->tp_retrans --;
p->tp_cong_win = 1 * p->tp_l_tpdusize;
if( error = tp_emit(CC_TPDU_type, p, 0, 0, data) )
p->tp_sock->so_error = error;
tp_ctimeout(p, TM_retrans, (int)p->tp_cc_ticks);
}
break;
case 0x26:
{
IncStat(ts_conn_gaveup);
tp_soisdisconnecting(p->tp_sock);
p->tp_sock->so_error = ETIMEDOUT;
tp_indicate(T_DISCONNECT, p, ETIMEDOUT);
(void) tp_emit(DR_TPDU_type, p, 0, E_TP_CONGEST, MNULL);
p->tp_retrans = p->tp_Nretrans;
tp_ctimeout(p, TM_retrans, (int)p->tp_dr_ticks);
}
break;
case 0x27:
{
tp_euntimeout(p, TM_data_retrans); /* all */
tp_cuntimeout(p, TM_inact);
tp_cuntimeout(p, TM_sendack);
IncStat(ts_conn_gaveup);
tp_soisdisconnecting(p->tp_sock);
p->tp_sock->so_error = ETIMEDOUT;
tp_indicate(T_DISCONNECT, p, ETIMEDOUT);
(void) tp_emit(DR_TPDU_type, p, 0, E_TP_CONGEST_2, MNULL);
p->tp_retrans = p->tp_Nretrans;
tp_ctimeout(p, TM_retrans, (int)p->tp_dr_ticks);
}
break;
case 0x28:
{
p->tp_cong_win = 1 * p->tp_l_tpdusize;
/* resume XPD */
if ( p->tp_Xsnd.sb_mb ) {
struct mbuf *m = m_copy(p->tp_Xsnd.sb_mb, 0, (int)p->tp_Xsnd.sb_cc);
int shift;
IFTRACE(D_XPD)
tptrace(TPPTmisc, "XPD retrans: Xuna Xsndnxt sndnxt snduna",
p->tp_Xuna, p->tp_Xsndnxt, p->tp_sndnxt,
p->tp_snduna);
ENDTRACE
IFDEBUG(D_XPD)
dump_mbuf(m, "XPD retrans emitting M");
ENDDEBUG
IncStat(ts_retrans_xpd);
p->tp_retrans --;
shift = max(p->tp_Nretrans - p->tp_retrans, 6);
(void) tp_emit(XPD_TPDU_type, p, p->tp_Xuna, 1, m);
tp_ctimeout(p, TM_retrans, ((int)p->tp_dt_ticks) << shift);
}
}
break;
case 0x29:
{
p->tp_rxtshift++;
(void) tp_data_retrans(p);
}
break;
case 0x2a:
{
p->tp_retrans --;
(void) tp_emit(DR_TPDU_type, p, 0, E_TP_DR_NO_REAS, MNULL);
IncStat(ts_retrans_dr);
tp_ctimeout(p, TM_retrans, (int)p->tp_dr_ticks);
}
break;
case 0x2b:
{
p->tp_sock->so_error = ETIMEDOUT;
p->tp_refstate = REF_FROZEN;
tp_recycle_tsuffix( p );
tp_etimeout(p, TM_reference, (int)p->tp_refer_ticks);
}
break;
case 0x2c:
{
tp_freeref(p->tp_lref);
tp_detach(p);
}
break;
case 0x2d:
{
if( p->tp_class != TP_CLASS_0) {
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
if ( e->ev_number == CC_TPDU )
(void) tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 0, MNULL);
}
/* ignore it if class 0 - state tables are blank for this */
}
break;
case 0x2e:
{
IFTRACE(D_DATA)
tptrace(TPPTmisc, "T_DATA_req sndnxt snduna fcredit, tpcb",
p->tp_sndnxt, p->tp_snduna, p->tp_fcredit, p);
ENDTRACE
tp_send(p);
}
break;
case 0x2f:
{
int error = 0;
/* resume XPD */
if ( p->tp_Xsnd.sb_mb ) {
struct mbuf *m = m_copy(p->tp_Xsnd.sb_mb, 0, (int)p->tp_Xsnd.sb_cc);
/* m_copy doesn't preserve the m_xlink field, but at this pt.
* that doesn't matter
*/
IFTRACE(D_XPD)
tptrace(TPPTmisc, "XPD req: Xuna Xsndnxt sndnxt snduna",
p->tp_Xuna, p->tp_Xsndnxt, p->tp_sndnxt,
p->tp_snduna);
ENDTRACE
IFDEBUG(D_XPD)
printf("T_XPD_req: sb_cc 0x%x\n", p->tp_Xsnd.sb_cc);
dump_mbuf(m, "XPD req emitting M");
ENDDEBUG
error =
tp_emit(XPD_TPDU_type, p, p->tp_Xuna, 1, m);
p->tp_retrans = p->tp_Nretrans;
tp_ctimeout(p, TM_retrans, (int)p->tp_rxtcur);
SEQ_INC(p, p->tp_Xsndnxt);
}
if(trick_hc)
return error;
}
break;
case 0x30:
{
struct sockbuf *sb = &p->tp_sock->so_snd;
IFDEBUG(D_ACKRECV)
printf("GOOD ACK seq 0x%x cdt 0x%x\n", e->ev_union.EV_AK_TPDU.e_seq, e->ev_union.EV_AK_TPDU.e_cdt);
ENDDEBUG
if( p->tp_class != TP_CLASS_0) {
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
}
sbwakeup(sb);
IFDEBUG(D_ACKRECV)
printf("GOOD ACK new sndnxt 0x%x\n", p->tp_sndnxt);
ENDDEBUG
}
break;
case 0x31:
{
IFTRACE(D_ACKRECV)
tptrace(TPPTmisc, "BOGUS ACK fcc_present, tp_r_subseq e_subseq",
e->ev_union.EV_AK_TPDU.e_fcc_present, p->tp_r_subseq, e->ev_union.EV_AK_TPDU.e_subseq, 0);
ENDTRACE
if( p->tp_class != TP_CLASS_0 ) {
if ( !e->ev_union.EV_AK_TPDU.e_fcc_present ) {
/* send ACK with FCC */
IncStat( ts_ackreason[_ACK_FCC_] );
(void) tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 1, MNULL);
}
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
}
}
break;
case 0x32:
{
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
tp_cuntimeout(p, TM_retrans);
sbwakeup( &p->tp_sock->so_snd );
/* resume normal data */
tp_send(p);
}
break;
case 0x33:
{
IFTRACE(D_ACKRECV)
tptrace(TPPTmisc, "BOGUS XACK eventtype ", e->ev_number, 0, 0,0);
ENDTRACE
if( p->tp_class != TP_CLASS_0 ) {
tp_ctimeout(p, TM_inact, (int)p->tp_inact_ticks);
}
}
break;
case 0x34:
{
int timo;
IFTRACE(D_TIMER)
tptrace(TPPTsendack, -1, p->tp_lcredit, p->tp_sent_uwe,
p->tp_sent_lcdt, 0);
ENDTRACE
IncPStat(p, tps_n_TMsendack);
(void) tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 0, MNULL);
if (p->tp_fcredit == 0) {
if (p->tp_rxtshift < TP_MAXRXTSHIFT)
p->tp_rxtshift++;
timo = (p->tp_dt_ticks) << p->tp_rxtshift;
} else
timo = p->tp_sendack_ticks;
tp_ctimeout(p, TM_sendack, timo);
}
break;
case 0x35:
{
if (sbspace(&p->tp_sock->so_rcv) > 0)
tp0_openflow(p);
}
break;
case 0x36:
{
if( trick_hc ) {
SeqNum ack_thresh;
/*
* If the upper window edge has advanced a reasonable
* amount beyond what was known, send an ACK.
* A reasonable amount is 2 packets, unless the max window
* is only 1 or 2 packets, in which case we
* should send an ack for any advance in the upper window edge.
*/
LOCAL_CREDIT(p);
ack_thresh = SEQ_SUB(p, p->tp_lcredit + p->tp_rcvnxt,
(p->tp_maxlcredit > 2 ? 2 : 1));
if (SEQ_GT(p, ack_thresh, p->tp_sent_uwe)) {
IncStat(ts_ackreason[_ACK_USRRCV_]);
p->tp_flags &= ~TPF_DELACK;
return tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 0, MNULL);
}
}
}
break;
case 0x37:
{
if(trick_hc)
return ECONNABORTED;
}
break;
case 0x38:
{
ASSERT( p->tp_state != TP_LISTENING );
tp_indicate(T_DISCONNECT, p, ECONNRESET);
tp_soisdisconnected(p);
}
break;
}
return 0;
}
_XEBEC_PG int
_Xebec_index( e,p )
struct tp_event *e;
tp_PCB_ *p;
{
switch( (e->ev_number<<4)+(p->tp_state) ) {
case 0x12:
if ( p->tp_retrans > 0 ) return 0x1e;
else return 0x1f;
case 0x13:
if ( p->tp_retrans > 0 ) return 0x2f;
else return 0x30;
case 0x14:
if ( p->tp_retrans > 0 ) return 0x32;
else return 0x31;
case 0x15:
if ( p->tp_retrans > 0 ) return 0x34;
else return 0x35;
case 0x54:
if (p->tp_rxtshift < TP_NRETRANS) return 0x33;
else return 0x31;
case 0x64:
if (p->tp_class == TP_CLASS_0) return 0x1a;
else return 0x1b;
case 0x77:
if ( p->tp_class == TP_CLASS_0) return 0xd;
else return 0xe;
case 0x86:
if ( e->ev_union.EV_DR_TPDU.e_sref != 0 ) return 0x2;
else return 0x3;
case 0xa2:
if (p->tp_class == TP_CLASS_0) return 0x1c;
else return 0x1d;
case 0xb2:
if (p->tp_class == TP_CLASS_0) return 0x5;
else return 0x0;
case 0xb4:
if ( tp_goodack(p, e->ev_union.EV_AK_TPDU.e_cdt, e->ev_union.EV_AK_TPDU.e_seq, e->ev_union.EV_AK_TPDU.e_subseq) ) return 0x3a;
else return 0x3b;
case 0xc3:
if ( IN_RWINDOW( p, e->ev_union.EV_DT_TPDU.e_seq,
p->tp_rcvnxt, SEQ(p, p->tp_rcvnxt + p->tp_lcredit)) ) return 0x21;
else return 0x24;
case 0xc4:
if ( p->tp_class == TP_CLASS_0 ) return 0x22;
else if ( IN_RWINDOW( p, e->ev_union.EV_DT_TPDU.e_seq,
p->tp_rcvnxt, SEQ(p, p->tp_rcvnxt + p->tp_lcredit)) ) return 0x23;
else return 0x25;
case 0xd3:
if (p->tp_Xrcvnxt == e->ev_union.EV_XPD_TPDU.e_seq) return 0x27;
else return 0x2a;
case 0xd4:
if (p->tp_Xrcvnxt == e->ev_union.EV_XPD_TPDU.e_seq) return 0x27;
else return 0x29;
case 0xe4:
if ( tp_goodXack(p, e->ev_union.EV_XAK_TPDU.e_seq) ) return 0x3c;
else return 0x3d;
case 0x102:
if ( p->tp_class == TP_CLASS_0 ) return 0x2d;
else return 0x2e;
case 0x104:
if ( p->tp_class == TP_CLASS_0 ) return 0x2d;
else return 0x2e;
case 0x144:
if (p->tp_class == TP_CLASS_0) return 0x3f;
else return 0x40;
case 0x162:
if (p->tp_class == TP_CLASS_0) return 0x2b;
else return 0x2c;
case 0x172:
if ( p->tp_class != TP_CLASS_4 ) return 0x42;
else return 0x46;
case 0x174:
if ( p->tp_class != TP_CLASS_4 ) return 0x42;
else return 0x47;
case 0x177:
if ( p->tp_class != TP_CLASS_4 ) return 0x42;
else return 0x43;
case 0x188:
if ( p->tp_class == TP_CLASS_0 ) return 0xf;
else if (tp_emit(CC_TPDU_type, p, 0,0, MCPY(p->tp_ucddata, M_NOWAIT)) == 0) return 0x10;
else return 0x11;
default: return 0;
} /* end switch */
} /* _Xebec_index() */
static int inx[26][9] = { {0,0,0,0,0,0,0,0,0,},
{0x0,0x0,0x0,0x0,0x31,0x0,0x0,0x0,0x0, },
{0x0,0x0,-1,-1,-1,-1,0x0,0x0,0x0, },
{0x0,0x0,0x0,0x0,0x3e,0x0,0x0,0x0,0x0, },
{0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, },
{0x0,0x0,0x0,0x0,0x0,0x0,0x36,0x0,0x0, },
{0x0,0x0,0x0,0x0,-1,0x0,0x0,0x0,0x0, },
{0x0,0x7,0x15,0x1b,-1,0x17,0x3,0xa,0x0, },
{0x0,0x19,0x6,0x20,0x37,0x8,0x3,-1,0x0, },
{0x0,0x14,0x13,0x13,0x13,0x16,-1,0xa,0x0, },
{0x0,0x7,0x6,0x1,0x9,0x18,0x3,0xa,0x0, },
{0x0,0x19,-1,0x1,0x37,0x8,0x3,0xa,0x0, },
{0x0,0x7,-1,0x26,-1,0x8,0x3,0xa,0x0, },
{0x0,0x7,0x6,-1,-1,0x8,0x3,0xa,0x0, },
{0x0,0x7,0x6,-1,-1,0x8,0x3,0xa,0x0, },
{0x0,0x7,0x6,0x1,-1,0x8,0x3,0xa,0x0, },
{0x0,0x12,0x0,0x0,0x0,0x0,0x0,0x0,0x0, },
{0x0,0x0,-1,0x2e,-1,0x0,0x4,0x0,0x2e, },
{0x0,0xb,0x0,0x0,0x0,0x0,0x0,0x0,0x0, },
{0x0,0x0,0x0,0x0,0x38,0x0,0x0,0x0,0x0, },
{0x0,0x0,0x0,0x0,0x39,0x0,0x0,0x0,0x0, },
{0x0,0x0,0x0,0x0,-1,0x0,0x41,0x0,0x0, },
{0x0,0x0,0x0,0x0,0x28,0x0,0x41,0x0,0x0, },
{0x0,0xc,-1,0x2c,0x0,0x2c,0x4,0xc,0x2c, },
{0x0,0x49,-1,0x45,-1,0x44,0x48,-1,0x0, },
{0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,-1, },
};
tp_driver(p, e)
register tp_PCB_ *p;
register struct tp_event *e;
{
register int index, error=0;
struct act_ent *a;
static struct act_ent erroraction = {0,-1};
index = inx[1 + e->ev_number][p->tp_state];
if(index<0) index=_Xebec_index(e, p);
if (index==0) {
a = &erroraction;
} else
a = &statetable[index];
if(a->a_action)
error = _Xebec_action( a->a_action, e, p );
IFTRACE(D_DRIVER)
tptrace(DRIVERTRACE, a->a_newstate, p->tp_state, e->ev_number, a->a_action, 0);
ENDTRACE
if(error==0)
p->tp_state = a->a_newstate;
return error;
}
Reference in New Issue View Git Blame Copy Permalink