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NetBSD/sys/netiso/tp_driver.c

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/* $NetBSD: tp_driver.c,v 1.14 2001/06/02 17:29:46 kristerw Exp $ */
#include "tp_states.h"
static const 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/tp_var.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 int trick_hc = 1;
#include "tp_events.h"
static int _Xebec_action __P((int, struct tp_event *, struct tp_pcb *));
static int _Xebec_index __P((struct tp_event *, struct tp_pcb *));
static int
_Xebec_action(a, e, p)
int a;
struct tp_event *e;
struct tp_pcb *p;
{
int error;
struct mbuf *data = NULL;
int doack;
struct socket *so = p->tp_sock;
struct sockbuf *sb;
int timo;
switch (a) {
case -1:
return tp_protocol_error(e, p);
case 0x1:
(void) tp_emit(DC_TPDU_type, p, 0, 0, NULL);
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:
#ifdef TPPT
if (tp_traceflags[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);
#endif
#ifdef ARGO_DEBUG
if (argo_debug[D_CONN]) {
printf("CR datalen 0x%x data %p",
e->ev_union.EV_CR_TPDU.e_datalen,
e->ev_union.EV_CR_TPDU.e_data);
}
#endif
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 = NULL;
}
break;
case 0x7:
IncStat(ts_tp0_conn);
#ifdef TPPT
if (tp_traceflags[D_CONN])
tptrace(TPPTmisc, "Confiming", p, 0, 0, 0);
#endif
#ifdef ARGO_DEBUG
if (argo_debug[D_CONN]) {
printf("Confirming connection: p");
}
#endif
soisconnected(p->tp_sock);
(void) tp_emit(CC_TPDU_type, p, 0, 0, NULL);
p->tp_fcredit = 1;
break;
case 0x8:
IncStat(ts_tp4_conn); /* even though not quite open */
#ifdef TPPT
if (tp_traceflags[D_CONN])
tptrace(TPPTmisc, "Confiming", p, 0, 0, 0);
#endif
#ifdef ARGO_DEBUG
if (argo_debug[D_CONN]) {
printf("Confirming connection: p");
}
#endif
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:
#ifdef ARGO_DEBUG
if (argo_debug[D_CONN]) {
printf("event: CR_TPDU emit CC failed done ");
}
#endif
soisdisconnected(p->tp_sock);
tp_recycle_tsuffix(p);
tp_freeref(p->tp_lref);
tp_detach(p);
break;
case 0xa:
#ifdef TPPT
if (tp_traceflags[D_CONN])
tptrace(TPPTmisc, "T_CONN_req flags ucddata",
(int) p->tp_flags, p->tp_ucddata, 0, 0);
#endif
data = MCPY(p->tp_ucddata, M_WAIT);
if (data) {
#ifdef ARGO_DEBUG
if (argo_debug[D_CONN]) {
printf("T_CONN_req.trans m_copy cc %p\n",
p->tp_ucddata);
dump_mbuf(data, "sosnd @ T_CONN_req");
}
#endif
}
if ((error = tp_emit(CR_TPDU_type, p, 0, 0, data)) != 0)
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 = NULL;
}
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, NULL);
}
break;
case 0xc:
if (e->ev_union.EV_DR_TPDU.e_sref != 0)
(void) tp_emit(DC_TPDU_type, p, 0, 0, NULL);
/*
* 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, NULL);
/* 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, NULL);
break;
case 0x14:
tp_cuntimeout(p, TM_retrans);
IncStat(ts_tp0_conn);
p->tp_fcredit = 1;
soisconnected(p->tp_sock);
break;
case 0x15:
#ifdef ARGO_DEBUG
if (argo_debug[D_CONN]) {
printf("trans: CC_TPDU in CRSENT state flags 0x%x\n",
(int) p->tp_flags);
}
#endif
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) {
#ifdef ARGO_DEBUG
if (argo_debug[D_CONN]) {
printf("dropping user connect data cc 0x%x\n",
p->tp_ucddata->m_len);
}
#endif
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 = NULL;
}
(void) tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 0, NULL);
tp_ctimeout(p, TM_inact, (int) p->tp_inact_ticks);
break;
case 0x16:
IncStat(ts_retrans_cr);
p->tp_cong_win = 1 * p->tp_l_tpdusize;
data = MCPY(p->tp_ucddata, M_NOWAIT);
if (p->tp_ucddata) {
#ifdef ARGO_DEBUG
if (argo_debug[D_CONN]) {
printf("TM_retrans.trans m_copy cc %p\n",
data);
dump_mbuf(p->tp_ucddata, "sosnd @ TM_retrans");
}
#endif
if (data == NULL)
return ENOBUFS;
}
p->tp_retrans--;
if ((error = tp_emit(CR_TPDU_type, p, 0, 0, data)) != 0) {
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:
data = MCPY(p->tp_ucddata, M_WAIT);
if ((error = tp_emit(CC_TPDU_type, p, 0, 0, data)) != 0) {
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:
/*
* 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);
#ifdef ARGO_DEBUG
if (argo_debug[D_DATA]) {
printf("tp_stash returns %d\n", doack);
}
#endif
if (doack) {
(void) tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 0, NULL);
tp_ctimeout(p, TM_sendack, (int) p->tp_keepalive_ticks);
} else
tp_ctimeout(p, TM_sendack, (int) p->tp_sendack_ticks);
#ifdef ARGO_DEBUG
if (argo_debug[D_DATA]) {
printf("after stash calling sbwakeup\n");
}
#endif
break;
case 0x1a:
tp0_stash(p, e);
sbwakeup(&p->tp_sock->so_rcv);
#ifdef ARGO_DEBUG
if (argo_debug[D_DATA]) {
printf("after stash calling sbwakeup\n");
}
#endif
break;
case 0x1b:
tp_ctimeout(p, TM_inact, (int) p->tp_inact_ticks);
sbwakeup(&p->tp_sock->so_rcv);
doack = tp_stash(p, e);
#ifdef ARGO_DEBUG
if (argo_debug[D_DATA]) {
printf("tp_stash returns %d\n", doack);
}
#endif
if (doack)
(void) tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 0, NULL);
else
tp_ctimeout_MIN(p, TM_sendack, (int) p->tp_sendack_ticks);
#ifdef ARGO_DEBUG
if (argo_debug[D_DATA]) {
printf("after stash calling sbwakeup\n");
}
#endif
break;
case 0x1c:
#ifdef TPPT
if (tp_traceflags[D_DATA])
tptrace(TPPTmisc, "NIW seq rcvnxt lcredit ",
e->ev_union.EV_DT_TPDU.e_seq,
p->tp_rcvnxt, p->tp_lcredit, 0);
#endif
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, NULL);
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);
#ifdef TPPT
if (tp_traceflags[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);
}
#endif
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);
}
#ifdef TPPT
if (tp_traceflags[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);
}
#endif
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);
#ifdef ARGO_DEBUG
if (argo_debug[D_XPD]) {
dump_mbuf(e->ev_union.EV_XPD_TPDU.e_data, "XPD TPDU: tp_Xrcv");
}
#endif
tp_indicate(T_XDATA, p, 0);
sbwakeup(&p->tp_Xrcv);
(void) tp_emit(XAK_TPDU_type, p, p->tp_Xrcvnxt, 0, NULL);
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:
#ifdef TPPT
if (tp_traceflags[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);
#endif
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:
/* 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:
/* 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:
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) {
#ifdef ARGO_DEBUG
if (argo_debug[D_CONN]) {
printf("T_DISC_req.trans tp_ucddata %p\n",
p->tp_ucddata);
dump_mbuf(data, "ucddata @ T_DISC_req");
}
#endif
}
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_REQ_TPDU.e_reason,
data);
break;
case 0x25:
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)) != 0)
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, NULL);
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, NULL);
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;
#ifdef TPPT
if (tp_traceflags[D_XPD]) {
tptrace(TPPTmisc,
"XPD retrans: Xuna Xsndnxt sndnxt snduna",
p->tp_Xuna, p->tp_Xsndnxt, p->tp_sndnxt,
p->tp_snduna);
}
#endif
#ifdef ARGO_DEBUG
if (argo_debug[D_XPD]) {
dump_mbuf(m, "XPD retrans emitting M");
}
#endif
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, NULL);
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, NULL);
}
/*
* ignore it if class 0 - state tables are blank for
* this
*/
break;
case 0x2e:
#ifdef TPPT
if (tp_traceflags[D_DATA])
tptrace(TPPTmisc,
"T_DATA_req sndnxt snduna fcredit, tpcb",
p->tp_sndnxt, p->tp_snduna, p->tp_fcredit, p);
#endif
tp_send(p);
break;
case 0x2f:
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
*/
#ifdef TPPT
if (tp_traceflags[D_XPD])
tptrace(TPPTmisc,
"XPD req: Xuna Xsndnxt sndnxt snduna",
p->tp_Xuna, p->tp_Xsndnxt, p->tp_sndnxt,
p->tp_snduna);
#endif
#ifdef ARGO_DEBUG
if (argo_debug[D_XPD]) {
printf("T_XPD_req: sb_cc 0x%lx\n", p->tp_Xsnd.sb_cc);
dump_mbuf(m, "XPD req emitting M");
}
#endif
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:
sb = &p->tp_sock->so_snd;
#ifdef ARGO_DEBUG
if (argo_debug[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);
}
#endif
if (p->tp_class != TP_CLASS_0) {
tp_ctimeout(p, TM_inact, (int) p->tp_inact_ticks);
}
sbwakeup(sb);
#ifdef ARGO_DEBUG
if (argo_debug[D_ACKRECV]) {
printf("GOOD ACK new sndnxt 0x%x\n", p->tp_sndnxt);
}
#endif
break;
case 0x31:
#ifdef TPPT
if (tp_traceflags[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);
#endif
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, NULL);
}
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:
#ifdef TPPT
if (tp_traceflags[D_ACKRECV])
tptrace(TPPTmisc, "BOGUS XACK eventtype ",
e->ev_number, 0, 0, 0);
#endif
if (p->tp_class != TP_CLASS_0) {
tp_ctimeout(p, TM_inact, (int) p->tp_inact_ticks);
}
break;
case 0x34:
#ifdef TPPT
if (tp_traceflags[D_TIMER])
tptrace(TPPTsendack, -1, p->tp_lcredit, p->tp_sent_uwe,
p->tp_sent_lcdt, 0);
#endif
IncPStat(p, tps_n_TMsendack);
(void) tp_emit(AK_TPDU_type, p, p->tp_rcvnxt, 0, NULL);
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, NULL);
}
}
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;
}
static int
_Xebec_index(e, p)
struct tp_event *e;
struct 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 const 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,},
};
int
tp_driver(p, e)
struct tp_pcb *p;
struct tp_event *e;
{
int index, error = 0;
const 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);
#ifdef TPPT
if (tp_traceflag[D_DRIVER])
tptrace(DRIVERTRACE, a->a_newstate, p->tp_state,
e->ev_number, a->a_action, 0);
#endif
if (error == 0)
p->tp_state = a->a_newstate;
return error;
}
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