text: /* $Id: l3_1tr6.c,v 2.15.2.3 2004/01/13 14:31:25 keil Exp $
   *
   * German 1TR6 D-channel protocol
   *
   * Author       Karsten Keil
   * Copyright    by Karsten Keil      <keil@isdn4linux.de>
   *
   * This software may be used and distributed according to the terms
   * of the GNU General Public License, incorporated herein by reference.
   *
   * For changes and modifications please read
   * Documentation/isdn/HiSax.cert
   *
   */
  
  #include "hisax.h"
  #include "l3_1tr6.h"
  #include "isdnl3.h"
  #include <linux/ctype.h>
  
  extern char *HiSax_getrev(const char *revision);
  static const char *l3_1tr6_revision = "$Revision: 2.15.2.3 $";
  
  #define MsgHead(ptr, cref, mty, dis)		\
  	*ptr++ = dis;				\
  	*ptr++ = 0x1;				\
  	*ptr++ = cref ^ 0x80;			\
  	*ptr++ = mty
  
  static void
  l3_1TR6_message(struct l3_process *pc, u_char mt, u_char pd)
  {
  	struct sk_buff *skb;
  	u_char *p;
  
  	if (!(skb = l3_alloc_skb(4)))
  		return;
  	p = skb_put(skb, 4);
  	MsgHead(p, pc->callref, mt, pd);
  	l3_msg(pc->st, DL_DATA | REQUEST, skb);
  }
  
  static void
  l3_1tr6_release_req(struct l3_process *pc, u_char pr, void *arg)
  {
  	StopAllL3Timer(pc);
  	newl3state(pc, 19);
  	l3_1TR6_message(pc, MT_N1_REL, PROTO_DIS_N1);
  	L3AddTimer(&pc->timer, T308, CC_T308_1);
  }
  
  static void
  l3_1tr6_invalid(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb = arg;
  
  	dev_kfree_skb(skb);
  	l3_1tr6_release_req(pc, 0, NULL);
  }
  
  static void
  l3_1tr6_error(struct l3_process *pc, u_char *msg, struct sk_buff *skb)
  {
  	dev_kfree_skb(skb);
  	if (pc->st->l3.debug & L3_DEB_WARN)
  		l3_debug(pc->st, msg);
  	l3_1tr6_release_req(pc, 0, NULL);
  }
  
  static void
  l3_1tr6_setup_req(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb;
  	u_char tmp[128];
  	u_char *p = tmp;
  	u_char *teln;
  	u_char *eaz;
  	u_char channel = 0;
  	int l;
  
  	MsgHead(p, pc->callref, MT_N1_SETUP, PROTO_DIS_N1);
  	teln = pc->para.setup.phone;
  	pc->para.spv = 0;
  	if (!isdigit(*teln)) {
  		switch (0x5f & *teln) {
  		case 'S':
  			pc->para.spv = 1;
  			break;
  		case 'C':
  			channel = 0x08;
  		case 'P':
  			channel |= 0x80;
  			teln++;
  			if (*teln == '1')
  				channel |= 0x01;
  			else
  				channel |= 0x02;
  			break;
  		default:
  			if (pc->st->l3.debug & L3_DEB_WARN)
  				l3_debug(pc->st, "Wrong MSN Code");
  			break;
  		}
  		teln++;
  	}
  	if (channel) {
  		*p++ = 0x18;	/* channel indicator */
  		*p++ = 1;
  		*p++ = channel;
  	}
  	if (pc->para.spv) {	/* SPV ? */
  		/* NSF SPV */
  		*p++ = WE0_netSpecFac;
  		*p++ = 4;	/* Laenge */
  		*p++ = 0;
  		*p++ = FAC_SPV;	/* SPV */
  		*p++ = pc->para.setup.si1;	/* 0 for all Services */
  		*p++ = pc->para.setup.si2;	/* 0 for all Services */
  		*p++ = WE0_netSpecFac;
  		*p++ = 4;	/* Laenge */
  		*p++ = 0;
  		*p++ = FAC_Activate;	/* aktiviere SPV (default) */
  		*p++ = pc->para.setup.si1;	/* 0 for all Services */
  		*p++ = pc->para.setup.si2;	/* 0 for all Services */
  	}
  	eaz = pc->para.setup.eazmsn;
  	if (*eaz) {
  		*p++ = WE0_origAddr;
  		*p++ = strlen(eaz) + 1;
  		/* Classify as AnyPref. */
  		*p++ = 0x81;	/* Ext = '1'B, Type = '000'B, Plan = '0001'B. */
  		while (*eaz)
  			*p++ = *eaz++ & 0x7f;
  	}
  	*p++ = WE0_destAddr;
  	*p++ = strlen(teln) + 1;
  	/* Classify as AnyPref. */
  	*p++ = 0x81;		/* Ext = '1'B, Type = '000'B, Plan = '0001'B. */
  	while (*teln)
  		*p++ = *teln++ & 0x7f;
  
  	*p++ = WE_Shift_F6;
  	/* Codesatz 6 fuer Service */
  	*p++ = WE6_serviceInd;
  	*p++ = 2;		/* len=2 info,info2 */
  	*p++ = pc->para.setup.si1;
  	*p++ = pc->para.setup.si2;
  
  	l = p - tmp;
  	if (!(skb = l3_alloc_skb(l)))
  		return;
  	memcpy(skb_put(skb, l), tmp, l);
  	L3DelTimer(&pc->timer);
  	L3AddTimer(&pc->timer, T303, CC_T303);
  	newl3state(pc, 1);
  	l3_msg(pc->st, DL_DATA | REQUEST, skb);
  }
  
  static void
  l3_1tr6_setup(struct l3_process *pc, u_char pr, void *arg)
  {
  	u_char *p;
  	int bcfound = 0;
  	char tmp[80];
  	struct sk_buff *skb = arg;
  
  	/* Channel Identification */
  	p = findie(skb->data, skb->len, WE0_chanID, 0);
  	if (p) {
  		if (p[1] != 1) {
  			l3_1tr6_error(pc, "setup wrong chanID len", skb);
  			return;
  		}
  		if ((p[2] & 0xf4) != 0x80) {
  			l3_1tr6_error(pc, "setup wrong WE0_chanID", skb);
  			return;
  		}
  		if ((pc->para.bchannel = p[2] & 0x3))
  			bcfound++;
  	} else {
  		l3_1tr6_error(pc, "missing setup chanID", skb);
  		return;
  	}
  
  	p = skb->data;
  	if ((p = findie(p, skb->len, WE6_serviceInd, 6))) {
  		pc->para.setup.si1 = p[2];
  		pc->para.setup.si2 = p[3];
  	} else {
  		l3_1tr6_error(pc, "missing setup SI", skb);
  		return;
  	}
  
  	p = skb->data;
  	if ((p = findie(p, skb->len, WE0_destAddr, 0)))
  		iecpy(pc->para.setup.eazmsn, p, 1);
  	else
  		pc->para.setup.eazmsn[0] = 0;
  
  	p = skb->data;
  	if ((p = findie(p, skb->len, WE0_origAddr, 0))) {
  		iecpy(pc->para.setup.phone, p, 1);
  	} else
  		pc->para.setup.phone[0] = 0;
  
  	p = skb->data;
  	pc->para.spv = 0;
  	if ((p = findie(p, skb->len, WE0_netSpecFac, 0))) {
  		if ((FAC_SPV == p[3]) || (FAC_Activate == p[3]))
  			pc->para.spv = 1;
  	}
  	dev_kfree_skb(skb);
  
  	/* Signal all services, linklevel takes care of Service-Indicator */
  	if (bcfound) {
  		if ((pc->para.setup.si1 != 7) && (pc->st->l3.debug & L3_DEB_WARN)) {
  			sprintf(tmp, "non-digital call: %s -> %s",
  				pc->para.setup.phone,
  				pc->para.setup.eazmsn);
  			l3_debug(pc->st, tmp);
  		}
  		newl3state(pc, 6);
  		pc->st->l3.l3l4(pc->st, CC_SETUP | INDICATION, pc);
  	} else
  		release_l3_process(pc);
  }
  
  static void
  l3_1tr6_setup_ack(struct l3_process *pc, u_char pr, void *arg)
  {
  	u_char *p;
  	struct sk_buff *skb = arg;
  
  	L3DelTimer(&pc->timer);
  	p = skb->data;
  	newl3state(pc, 2);
  	if ((p = findie(p, skb->len, WE0_chanID, 0))) {
  		if (p[1] != 1) {
  			l3_1tr6_error(pc, "setup_ack wrong chanID len", skb);
  			return;
  		}
  		if ((p[2] & 0xf4) != 0x80) {
  			l3_1tr6_error(pc, "setup_ack wrong WE0_chanID", skb);
  			return;
  		}
  		pc->para.bchannel = p[2] & 0x3;
  	} else {
  		l3_1tr6_error(pc, "missing setup_ack WE0_chanID", skb);
  		return;
  	}
  	dev_kfree_skb(skb);
  	L3AddTimer(&pc->timer, T304, CC_T304);
  	pc->st->l3.l3l4(pc->st, CC_MORE_INFO | INDICATION, pc);
  }
  
  static void
  l3_1tr6_call_sent(struct l3_process *pc, u_char pr, void *arg)
  {
  	u_char *p;
  	struct sk_buff *skb = arg;
  
  	L3DelTimer(&pc->timer);
  	p = skb->data;
  	if ((p = findie(p, skb->len, WE0_chanID, 0))) {
  		if (p[1] != 1) {
  			l3_1tr6_error(pc, "call sent wrong chanID len", skb);
  			return;
  		}
  		if ((p[2] & 0xf4) != 0x80) {
  			l3_1tr6_error(pc, "call sent wrong WE0_chanID", skb);
  			return;
  		}
  		if ((pc->state == 2) && (pc->para.bchannel != (p[2] & 0x3))) {
  			l3_1tr6_error(pc, "call sent wrong chanID value", skb);
  			return;
  		}
  		pc->para.bchannel = p[2] & 0x3;
  	} else {
  		l3_1tr6_error(pc, "missing call sent WE0_chanID", skb);
  		return;
  	}
  	dev_kfree_skb(skb);
  	L3AddTimer(&pc->timer, T310, CC_T310);
  	newl3state(pc, 3);
  	pc->st->l3.l3l4(pc->st, CC_PROCEEDING | INDICATION, pc);
  }
  
  static void
  l3_1tr6_alert(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb = arg;
  
  	dev_kfree_skb(skb);
  	L3DelTimer(&pc->timer);	/* T304 */
  	newl3state(pc, 4);
  	pc->st->l3.l3l4(pc->st, CC_ALERTING | INDICATION, pc);
  }
  
  static void
  l3_1tr6_info(struct l3_process *pc, u_char pr, void *arg)
  {
  	u_char *p;
  	int i, tmpcharge = 0;
  	char a_charge[8], tmp[32];
  	struct sk_buff *skb = arg;
  
  	p = skb->data;
  	if ((p = findie(p, skb->len, WE6_chargingInfo, 6))) {
  		iecpy(a_charge, p, 1);
  		for (i = 0; i < strlen(a_charge); i++) {
  			tmpcharge *= 10;
  			tmpcharge += a_charge[i] & 0xf;
  		}
  		if (tmpcharge > pc->para.chargeinfo) {
  			pc->para.chargeinfo = tmpcharge;
  			pc->st->l3.l3l4(pc->st, CC_CHARGE | INDICATION, pc);
  		}
  		if (pc->st->l3.debug & L3_DEB_CHARGE) {
  			sprintf(tmp, "charging info %d", pc->para.chargeinfo);
  			l3_debug(pc->st, tmp);
  		}
  	} else if (pc->st->l3.debug & L3_DEB_CHARGE)
  		l3_debug(pc->st, "charging info not found");
  	dev_kfree_skb(skb);
  
  }
  
  static void
  l3_1tr6_info_s2(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb = arg;
  
  	dev_kfree_skb(skb);
  }
  
  static void
  l3_1tr6_connect(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb = arg;
  
  	L3DelTimer(&pc->timer);	/* T310 */
  	if (!findie(skb->data, skb->len, WE6_date, 6)) {
  		l3_1tr6_error(pc, "missing connect date", skb);
  		return;
  	}
  	newl3state(pc, 10);
  	dev_kfree_skb(skb);
  	pc->para.chargeinfo = 0;
  	pc->st->l3.l3l4(pc->st, CC_SETUP | CONFIRM, pc);
  }
  
  static void
  l3_1tr6_rel(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb = arg;
  	u_char *p;
  
  	p = skb->data;
  	if ((p = findie(p, skb->len, WE0_cause, 0))) {
  		if (p[1] > 0) {
  			pc->para.cause = p[2];
  			if (p[1] > 1)
  				pc->para.loc = p[3];
  			else
  				pc->para.loc = 0;
  		} else {
  			pc->para.cause = 0;
  			pc->para.loc = 0;
  		}
  	} else {
  		pc->para.cause = NO_CAUSE;
  		l3_1tr6_error(pc, "missing REL cause", skb);
  		return;
  	}
  	dev_kfree_skb(skb);
  	StopAllL3Timer(pc);
  	newl3state(pc, 0);
  	l3_1TR6_message(pc, MT_N1_REL_ACK, PROTO_DIS_N1);
  	pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
  	release_l3_process(pc);
  }
  
  static void
  l3_1tr6_rel_ack(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb = arg;
  
  	dev_kfree_skb(skb);
  	StopAllL3Timer(pc);
  	newl3state(pc, 0);
  	pc->para.cause = NO_CAUSE;
  	pc->st->l3.l3l4(pc->st, CC_RELEASE | CONFIRM, pc);
  	release_l3_process(pc);
  }
  
  static void
  l3_1tr6_disc(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb = arg;
  	u_char *p;
  	int i, tmpcharge = 0;
  	char a_charge[8], tmp[32];
  
  	StopAllL3Timer(pc);
  	p = skb->data;
  	if ((p = findie(p, skb->len, WE6_chargingInfo, 6))) {
  		iecpy(a_charge, p, 1);
  		for (i = 0; i < strlen(a_charge); i++) {
  			tmpcharge *= 10;
  			tmpcharge += a_charge[i] & 0xf;
  		}
  		if (tmpcharge > pc->para.chargeinfo) {
  			pc->para.chargeinfo = tmpcharge;
  			pc->st->l3.l3l4(pc->st, CC_CHARGE | INDICATION, pc);
  		}
  		if (pc->st->l3.debug & L3_DEB_CHARGE) {
  			sprintf(tmp, "charging info %d", pc->para.chargeinfo);
  			l3_debug(pc->st, tmp);
  		}
  	} else if (pc->st->l3.debug & L3_DEB_CHARGE)
  		l3_debug(pc->st, "charging info not found");
  
  
  	p = skb->data;
  	if ((p = findie(p, skb->len, WE0_cause, 0))) {
  		if (p[1] > 0) {
  			pc->para.cause = p[2];
  			if (p[1] > 1)
  				pc->para.loc = p[3];
  			else
  				pc->para.loc = 0;
  		} else {
  			pc->para.cause = 0;
  			pc->para.loc = 0;
  		}
  	} else {
  		if (pc->st->l3.debug & L3_DEB_WARN)
  			l3_debug(pc->st, "cause not found");
  		pc->para.cause = NO_CAUSE;
  	}
  	if (!findie(skb->data, skb->len, WE6_date, 6)) {
  		l3_1tr6_error(pc, "missing connack date", skb);
  		return;
  	}
  	dev_kfree_skb(skb);
  	newl3state(pc, 12);
  	pc->st->l3.l3l4(pc->st, CC_DISCONNECT | INDICATION, pc);
  }
  
  
  static void
  l3_1tr6_connect_ack(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb = arg;
  
  	if (!findie(skb->data, skb->len, WE6_date, 6)) {
  		l3_1tr6_error(pc, "missing connack date", skb);
  		return;
  	}
  	dev_kfree_skb(skb);
  	newl3state(pc, 10);
  	pc->para.chargeinfo = 0;
  	L3DelTimer(&pc->timer);
  	pc->st->l3.l3l4(pc->st, CC_SETUP_COMPL | INDICATION, pc);
  }
  
  static void
  l3_1tr6_alert_req(struct l3_process *pc, u_char pr, void *arg)
  {
  	newl3state(pc, 7);
  	l3_1TR6_message(pc, MT_N1_ALERT, PROTO_DIS_N1);
  }
  
  static void
  l3_1tr6_setup_rsp(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb;
  	u_char tmp[24];
  	u_char *p = tmp;
  	int l;
  
  	MsgHead(p, pc->callref, MT_N1_CONN, PROTO_DIS_N1);
  	if (pc->para.spv) {	/* SPV ? */
  		/* NSF SPV */
  		*p++ = WE0_netSpecFac;
  		*p++ = 4;	/* Laenge */
  		*p++ = 0;
  		*p++ = FAC_SPV;	/* SPV */
  		*p++ = pc->para.setup.si1;
  		*p++ = pc->para.setup.si2;
  		*p++ = WE0_netSpecFac;
  		*p++ = 4;	/* Laenge */
  		*p++ = 0;
  		*p++ = FAC_Activate;	/* aktiviere SPV */
  		*p++ = pc->para.setup.si1;
  		*p++ = pc->para.setup.si2;
  	}
  	newl3state(pc, 8);
  	l = p - tmp;
  	if (!(skb = l3_alloc_skb(l)))
  		return;
  	memcpy(skb_put(skb, l), tmp, l);
  	l3_msg(pc->st, DL_DATA | REQUEST, skb);
  	L3DelTimer(&pc->timer);
  	L3AddTimer(&pc->timer, T313, CC_T313);
  }
  
  static void
  l3_1tr6_reset(struct l3_process *pc, u_char pr, void *arg)
  {
  	release_l3_process(pc);
  }
  
  static void
  l3_1tr6_disconnect_req(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb;
  	u_char tmp[16];
  	u_char *p = tmp;
  	int l;
  	u_char cause = 0x10;
  	u_char clen = 1;
  
  	if (pc->para.cause > 0)
  		cause = pc->para.cause;
  	/* Map DSS1 causes */
  	switch (cause & 0x7f) {
  	case 0x10:
  		clen = 0;
  		break;
  	case 0x11:
  		cause = CAUSE_UserBusy;
  		break;
  	case 0x15:
  		cause = CAUSE_CallRejected;
  		break;
  	}
  	StopAllL3Timer(pc);
  	MsgHead(p, pc->callref, MT_N1_DISC, PROTO_DIS_N1);
  	*p++ = WE0_cause;
  	*p++ = clen;		/* Laenge */
  	if (clen)
  		*p++ = cause | 0x80;
  	newl3state(pc, 11);
  	l = p - tmp;
  	if (!(skb = l3_alloc_skb(l)))
  		return;
  	memcpy(skb_put(skb, l), tmp, l);
  	l3_msg(pc->st, DL_DATA | REQUEST, skb);
  	L3AddTimer(&pc->timer, T305, CC_T305);
  }
  
  static void
  l3_1tr6_t303(struct l3_process *pc, u_char pr, void *arg)
  {
  	if (pc->N303 > 0) {
  		pc->N303--;
  		L3DelTimer(&pc->timer);
  		l3_1tr6_setup_req(pc, pr, arg);
  	} else {
  		L3DelTimer(&pc->timer);
  		pc->para.cause = 0;
  		l3_1tr6_disconnect_req(pc, 0, NULL);
  	}
  }
  
  static void
  l3_1tr6_t304(struct l3_process *pc, u_char pr, void *arg)
  {
  	L3DelTimer(&pc->timer);
  	pc->para.cause = 0xE6;
  	l3_1tr6_disconnect_req(pc, pr, NULL);
  	pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
  }
  
  static void
  l3_1tr6_t305(struct l3_process *pc, u_char pr, void *arg)
  {
  	struct sk_buff *skb;
  	u_char tmp[16];
  	u_char *p = tmp;
  	int l;
  	u_char cause = 0x90;
  	u_char clen = 1;
  
  	L3DelTimer(&pc->timer);
  	if (pc->para.cause != NO_CAUSE)
  		cause = pc->para.cause;
  	/* Map DSS1 causes */
  	switch (cause & 0x7f) {
  	case 0x10:
  		clen = 0;
  		break;
  	case 0x15:
  		cause = CAUSE_CallRejected;
  		break;
  	}
  	MsgHead(p, pc->callref, MT_N1_REL, PROTO_DIS_N1);
  	*p++ = WE0_cause;
  	*p++ = clen;		/* Laenge */
  	if (clen)
  		*p++ = cause;
  	newl3state(pc, 19);
  	l = p - tmp;
  	if (!(skb = l3_alloc_skb(l)))
  		return;
  	memcpy(skb_put(skb, l), tmp, l);
  	l3_msg(pc->st, DL_DATA | REQUEST, skb);
  	L3AddTimer(&pc->timer, T308, CC_T308_1);
  }
  
  static void
  l3_1tr6_t310(struct l3_process *pc, u_char pr, void *arg)
  {
  	L3DelTimer(&pc->timer);
  	pc->para.cause = 0xE6;
  	l3_1tr6_disconnect_req(pc, pr, NULL);
  	pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
  }
  
  static void
  l3_1tr6_t313(struct l3_process *pc, u_char pr, void *arg)
  {
  	L3DelTimer(&pc->timer);
  	pc->para.cause = 0xE6;
  	l3_1tr6_disconnect_req(pc, pr, NULL);
  	pc->st->l3.l3l4(pc->st, CC_CONNECT_ERR, pc);
  }
  
  static void
  l3_1tr6_t308_1(struct l3_process *pc, u_char pr, void *arg)
  {
  	L3DelTimer(&pc->timer);
  	l3_1TR6_message(pc, MT_N1_REL, PROTO_DIS_N1);
  	L3AddTimer(&pc->timer, T308, CC_T308_2);
  	newl3state(pc, 19);
  }
  
  static void
  l3_1tr6_t308_2(struct l3_process *pc, u_char pr, void *arg)
  {
  	L3DelTimer(&pc->timer);
  	pc->st->l3.l3l4(pc->st, CC_RELEASE_ERR, pc);
  	release_l3_process(pc);
  }
  
  static void
  l3_1tr6_dl_reset(struct l3_process *pc, u_char pr, void *arg)
  {
  	pc->para.cause = CAUSE_LocalProcErr;
  	l3_1tr6_disconnect_req(pc, pr, NULL);
  	pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
  }
  
  static void
  l3_1tr6_dl_release(struct l3_process *pc, u_char pr, void *arg)
  {
  	newl3state(pc, 0);
  	pc->para.cause = 0x1b;          /* Destination out of order */
  	pc->para.loc = 0;
  	pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
  	release_l3_process(pc);
  }
  
  /* *INDENT-OFF* */
  static struct stateentry downstl[] =
  {
  	{SBIT(0),
  	 CC_SETUP | REQUEST, l3_1tr6_setup_req},
  	{SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(6) | SBIT(7) | SBIT(8) |
  	 SBIT(10),
  	 CC_DISCONNECT | REQUEST, l3_1tr6_disconnect_req},
  	{SBIT(12),
  	 CC_RELEASE | REQUEST, l3_1tr6_release_req},
  	{SBIT(6),
  	 CC_IGNORE | REQUEST, l3_1tr6_reset},
  	{SBIT(6),
  	 CC_REJECT | REQUEST, l3_1tr6_disconnect_req},
  	{SBIT(6),
  	 CC_ALERTING | REQUEST, l3_1tr6_alert_req},
  	{SBIT(6) | SBIT(7),
  	 CC_SETUP | RESPONSE, l3_1tr6_setup_rsp},
  	{SBIT(1),
  	 CC_T303, l3_1tr6_t303},
  	{SBIT(2),
  	 CC_T304, l3_1tr6_t304},
  	{SBIT(3),
  	 CC_T310, l3_1tr6_t310},
  	{SBIT(8),
  	 CC_T313, l3_1tr6_t313},
  	{SBIT(11),
  	 CC_T305, l3_1tr6_t305},
  	{SBIT(19),
  	 CC_T308_1, l3_1tr6_t308_1},
  	{SBIT(19),
  	 CC_T308_2, l3_1tr6_t308_2},
  };
  
  static struct stateentry datastln1[] =
  {
  	{SBIT(0),
  	 MT_N1_INVALID, l3_1tr6_invalid},
  	{SBIT(0),
  	 MT_N1_SETUP, l3_1tr6_setup},
  	{SBIT(1),
  	 MT_N1_SETUP_ACK, l3_1tr6_setup_ack},
  	{SBIT(1) | SBIT(2),
  	 MT_N1_CALL_SENT, l3_1tr6_call_sent},
  	{SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(10),
  	 MT_N1_DISC, l3_1tr6_disc},
  	{SBIT(2) | SBIT(3) | SBIT(4),
  	 MT_N1_ALERT, l3_1tr6_alert},
  	{SBIT(2) | SBIT(3) | SBIT(4),
  	 MT_N1_CONN, l3_1tr6_connect},
  	{SBIT(2),
  	 MT_N1_INFO, l3_1tr6_info_s2},
  	{SBIT(8),
  	 MT_N1_CONN_ACK, l3_1tr6_connect_ack},
  	{SBIT(10),
  	 MT_N1_INFO, l3_1tr6_info},
  	{SBIT(0) | SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) |
  	 SBIT(10) | SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17),
  	 MT_N1_REL, l3_1tr6_rel},
  	{SBIT(19),
  	 MT_N1_REL, l3_1tr6_rel_ack},
  	{SBIT(0) | SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) |
  	 SBIT(10) | SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17),
  	 MT_N1_REL_ACK, l3_1tr6_invalid},
  	{SBIT(19),
  	 MT_N1_REL_ACK, l3_1tr6_rel_ack}
  };
  
  static struct stateentry manstatelist[] =
  {
  	{SBIT(2),
  	 DL_ESTABLISH | INDICATION, l3_1tr6_dl_reset},
  	{ALL_STATES,
  	 DL_RELEASE | INDICATION, l3_1tr6_dl_release},
  };
  
  /* *INDENT-ON* */
  
  static void
  up1tr6(struct PStack *st, int pr, void *arg)
  {
  	int i, mt, cr;
  	struct l3_process *proc;
  	struct sk_buff *skb = arg;
  	char tmp[80];
  
  	switch (pr) {
  	case (DL_DATA | INDICATION):
  	case (DL_UNIT_DATA | INDICATION):
  		break;
  	case (DL_ESTABLISH | CONFIRM):
  	case (DL_ESTABLISH | INDICATION):
  	case (DL_RELEASE | INDICATION):
  	case (DL_RELEASE | CONFIRM):
  		l3_msg(st, pr, arg);
  		return;
  		break;
  	}
  	if (skb->len < 4) {
  		if (st->l3.debug & L3_DEB_PROTERR) {
  			sprintf(tmp, "up1tr6 len only %d", skb->len);
  			l3_debug(st, tmp);
  		}
  		dev_kfree_skb(skb);
  		return;
  	}
  	if ((skb->data[0] & 0xfe) != PROTO_DIS_N0) {
  		if (st->l3.debug & L3_DEB_PROTERR) {
  			sprintf(tmp, "up1tr6%sunexpected discriminator %x message len %d",
  				(pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
  				skb->data[0], skb->len);
  			l3_debug(st, tmp);
  		}
  		dev_kfree_skb(skb);
  		return;
  	}
  	if (skb->data[1] != 1) {
  		if (st->l3.debug & L3_DEB_PROTERR) {
  			sprintf(tmp, "up1tr6 CR len not 1");
  			l3_debug(st, tmp);
  		}
  		dev_kfree_skb(skb);
  		return;
  	}
  	cr = skb->data[2];
  	mt = skb->data[3];
  	if (skb->data[0] == PROTO_DIS_N0) {
  		dev_kfree_skb(skb);
  		if (st->l3.debug & L3_DEB_STATE) {
  			sprintf(tmp, "up1tr6%s N0 mt %x unhandled",
  				(pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ", mt);
  			l3_debug(st, tmp);
  		}
  	} else if (skb->data[0] == PROTO_DIS_N1) {
  		if (!(proc = getl3proc(st, cr))) {
  			if (mt == MT_N1_SETUP) {
  				if (cr < 128) {
  					if (!(proc = new_l3_process(st, cr))) {
  						if (st->l3.debug & L3_DEB_PROTERR) {
  							sprintf(tmp, "up1tr6 no roc mem");
  							l3_debug(st, tmp);
  						}
  						dev_kfree_skb(skb);
  						return;
  					}
  				} else {
  					dev_kfree_skb(skb);
  					return;
  				}
  			} else if ((mt == MT_N1_REL) || (mt == MT_N1_REL_ACK) ||
  				   (mt == MT_N1_CANC_ACK) || (mt == MT_N1_CANC_REJ) ||
  				   (mt == MT_N1_REG_ACK) || (mt == MT_N1_REG_REJ) ||
  				   (mt == MT_N1_SUSP_ACK) || (mt == MT_N1_RES_REJ) ||
  				   (mt == MT_N1_INFO)) {
  				dev_kfree_skb(skb);
  				return;
  			} else {
  				if (!(proc = new_l3_process(st, cr))) {
  					if (st->l3.debug & L3_DEB_PROTERR) {
  						sprintf(tmp, "up1tr6 no roc mem");
  						l3_debug(st, tmp);
  					}
  					dev_kfree_skb(skb);
  					return;
  				}
  				mt = MT_N1_INVALID;
  			}
  		}
  		for (i = 0; i < ARRAY_SIZE(datastln1); i++)
  			if ((mt == datastln1[i].primitive) &&
  			    ((1 << proc->state) & datastln1[i].state))
  				break;
  		if (i == ARRAY_SIZE(datastln1)) {
  			dev_kfree_skb(skb);
  			if (st->l3.debug & L3_DEB_STATE) {
  				sprintf(tmp, "up1tr6%sstate %d mt %x unhandled",
  					(pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
  					proc->state, mt);
  				l3_debug(st, tmp);
  			}
  			return;
  		} else {
  			if (st->l3.debug & L3_DEB_STATE) {
  				sprintf(tmp, "up1tr6%sstate %d mt %x",
  					(pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
  					proc->state, mt);
  				l3_debug(st, tmp);
  			}
  			datastln1[i].rout(proc, pr, skb);
  		}
  	}
  }
  
  static void
  down1tr6(struct PStack *st, int pr, void *arg)
  {
  	int i, cr;
  	struct l3_process *proc;
  	struct Channel *chan;
  	char tmp[80];
  
  	if ((DL_ESTABLISH | REQUEST) == pr) {
  		l3_msg(st, pr, NULL);
  		return;
  	} else if ((CC_SETUP | REQUEST) == pr) {
  		chan = arg;
  		cr = newcallref();
  		cr |= 0x80;
  		if (!(proc = new_l3_process(st, cr))) {
  			return;
  		} else {
  			proc->chan = chan;
  			chan->proc = proc;
  			memcpy(&proc->para.setup, &chan->setup, sizeof(setup_parm));
  			proc->callref = cr;
  		}
  	} else {
  		proc = arg;
  	}
  
  	for (i = 0; i < ARRAY_SIZE(downstl); i++)
  		if ((pr == downstl[i].primitive) &&
  		    ((1 << proc->state) & downstl[i].state))
  			break;
  	if (i == ARRAY_SIZE(downstl)) {
  		if (st->l3.debug & L3_DEB_STATE) {
  			sprintf(tmp, "down1tr6 state %d prim %d unhandled",
  				proc->state, pr);
  			l3_debug(st, tmp);
  		}
  	} else {
  		if (st->l3.debug & L3_DEB_STATE) {
  			sprintf(tmp, "down1tr6 state %d prim %d",
  				proc->state, pr);
  			l3_debug(st, tmp);
  		}
  		downstl[i].rout(proc, pr, arg);
  	}
  }
  
  static void
  man1tr6(struct PStack *st, int pr, void *arg)
  {
  	int i;
  	struct l3_process *proc = arg;
  
  	if (!proc) {
  		printk(KERN_ERR "HiSax man1tr6 without proc pr=%04x\n", pr);
  		return;
  	}
  	for (i = 0; i < ARRAY_SIZE(manstatelist); i++)
  		if ((pr == manstatelist[i].primitive) &&
  		    ((1 << proc->state) & manstatelist[i].state))
  			break;
  	if (i == ARRAY_SIZE(manstatelist)) {
  		if (st->l3.debug & L3_DEB_STATE) {
  			l3_debug(st, "cr %d man1tr6 state %d prim %d unhandled",
  				 proc->callref & 0x7f, proc->state, pr);
  		}
  	} else {
  		if (st->l3.debug & L3_DEB_STATE) {
  			l3_debug(st, "cr %d man1tr6 state %d prim %d",
  				 proc->callref & 0x7f, proc->state, pr);
  		}
  		manstatelist[i].rout(proc, pr, arg);
  	}
  }
  
  void
  setstack_1tr6(struct PStack *st)
  {
  	char tmp[64];
  
  	st->lli.l4l3 = down1tr6;
  	st->l2.l2l3 = up1tr6;
  	st->l3.l3ml3 = man1tr6;
  	st->l3.N303 = 0;
  
  	strcpy(tmp, l3_1tr6_revision);
  	printk(KERN_INFO "HiSax: 1TR6 Rev. %s\n", HiSax_getrev(tmp));
  }
  