/********************************************************************* *                 * Filename:      ircomm_ttp.c * Version:       1.0 * Description:   Interface between IrCOMM and IrTTP * Status:        Stable * Author:        Dag Brattli <dagb@cs.uit.no> * Created at:    Sun Jun  6 20:48:27 1999 * Modified at:   Mon Dec 13 11:35:13 1999 * Modified by:   Dag Brattli <dagb@cs.uit.no> *  *     Copyright (c) 1999 Dag Brattli, All Rights Reserved. *     Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com> *      *     This program is free software; you can redistribute it and/or  *     modify it under the terms of the GNU General Public License as  *     published by the Free Software Foundation; either version 2 of  *     the License, or (at your option) any later version. *  *     This program is distributed in the hope that it will be useful, *     but WITHOUT ANY WARRANTY; without even the implied warranty of *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *     GNU General Public License for more details. *  *     You should have received a copy of the GNU General Public License  *     along with this program; if not, write to the Free Software  *     Foundation, Inc., 59 Temple Place, Suite 330, Boston,  *     MA 02111-1307 USA *      ********************************************************************/#include <linux/sched.h>#include <linux/init.h>#include <net/irda/irda.h>#include <net/irda/irlmp.h>#include <net/irda/iriap.h>#include <net/irda/irttp.h>#include <net/irda/ircomm_event.h>#include <net/irda/ircomm_ttp.h>/* * Function ircomm_open_tsap (self) * *     * */int ircomm_open_tsap(struct ircomm_cb *self){	notify_t notify;	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );	/* Register callbacks */	irda_notify_init(&notify);	notify.data_indication       = ircomm_ttp_data_indication;	notify.connect_confirm       = ircomm_ttp_connect_confirm;	notify.connect_indication    = ircomm_ttp_connect_indication;	notify.flow_indication       = ircomm_ttp_flow_indication;	notify.disconnect_indication = ircomm_ttp_disconnect_indication;	notify.instance = self;	strlcpy(notify.name, "IrCOMM", sizeof(notify.name));	self->tsap = irttp_open_tsap(LSAP_ANY, DEFAULT_INITIAL_CREDIT,				     &notify);	if (!self->tsap) {		IRDA_DEBUG(0, "%sfailed to allocate tsap\n", __FUNCTION__ );		return -1;	}	self->slsap_sel = self->tsap->stsap_sel;	/*	 *  Initialize the call-table for issuing commands	 */	self->issue.data_request       = ircomm_ttp_data_request;	self->issue.connect_request    = ircomm_ttp_connect_request;	self->issue.connect_response   = ircomm_ttp_connect_response;	self->issue.disconnect_request = ircomm_ttp_disconnect_request;	return 0;}/* * Function ircomm_ttp_connect_request (self, userdata) * *     * */int ircomm_ttp_connect_request(struct ircomm_cb *self, 			       struct sk_buff *userdata, 			       struct ircomm_info *info){	int ret = 0;	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );	/* Don't forget to refcount it - should be NULL anyway */	if(userdata)		skb_get(userdata);	ret = irttp_connect_request(self->tsap, info->dlsap_sel,				    info->saddr, info->daddr, NULL, 				    TTP_SAR_DISABLE, userdata); 	return ret;}	/* * Function ircomm_ttp_connect_response (self, skb) * *     * */int ircomm_ttp_connect_response(struct ircomm_cb *self,				struct sk_buff *userdata){	int ret;	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );		/* Don't forget to refcount it - should be NULL anyway */	if(userdata)		skb_get(userdata);	ret = irttp_connect_response(self->tsap, TTP_SAR_DISABLE, userdata);	return ret;}/* * Function ircomm_ttp_data_request (self, userdata) * *    Send IrCOMM data to IrTTP layer. Currently we do not try to combine  *    control data with pure data, so they will be sent as separate frames.  *    Should not be a big problem though, since control frames are rare. But *    some of them are sent after connection establishment, so this can  *    increase the latency a bit. */int ircomm_ttp_data_request(struct ircomm_cb *self,			    struct sk_buff *skb, 			    int clen){	int ret;	ASSERT(skb != NULL, return -1;);	IRDA_DEBUG(2, "%s(), clen=%d\n", __FUNCTION__ , clen);	/* 	 * Insert clen field, currently we either send data only, or control	 * only frames, to make things easier and avoid queueing	 */	ASSERT(skb_headroom(skb) >= IRCOMM_HEADER_SIZE, return -1;);	/* Don't forget to refcount it - see ircomm_tty_do_softint() */	skb_get(skb);	skb_push(skb, IRCOMM_HEADER_SIZE);	skb->data[0] = clen;	ret = irttp_data_request(self->tsap, skb);	if (ret) {		ERROR("%s(), failed\n", __FUNCTION__);		/* irttp_data_request already free the packet */	}	return ret;}/* * Function ircomm_ttp_data_indication (instance, sap, skb) * *    Incoming data * */int ircomm_ttp_data_indication(void *instance, void *sap,			       struct sk_buff *skb){	struct ircomm_cb *self = (struct ircomm_cb *) instance;	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );		ASSERT(self != NULL, return -1;);	ASSERT(self->magic == IRCOMM_MAGIC, return -1;);	ASSERT(skb != NULL, return -1;);	ircomm_do_event(self, IRCOMM_TTP_DATA_INDICATION, skb, NULL);	/* Drop reference count - see ircomm_tty_data_indication(). */	dev_kfree_skb(skb);	return 0;}void ircomm_ttp_connect_confirm(void *instance, void *sap,				struct qos_info *qos, 				__u32 max_sdu_size, 				__u8 max_header_size,				struct sk_buff *skb){	struct ircomm_cb *self = (struct ircomm_cb *) instance;	struct ircomm_info info;	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );	ASSERT(self != NULL, return;);	ASSERT(self->magic == IRCOMM_MAGIC, return;);	ASSERT(skb != NULL, return;);	ASSERT(qos != NULL, goto out;);	if (max_sdu_size != TTP_SAR_DISABLE) {		ERROR("%s(), SAR not allowed for IrCOMM!\n", __FUNCTION__);		goto out;	}	info.max_data_size = irttp_get_max_seg_size(self->tsap)		- IRCOMM_HEADER_SIZE;	info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE;	info.qos = qos;	ircomm_do_event(self, IRCOMM_TTP_CONNECT_CONFIRM, skb, &info);out:	/* Drop reference count - see ircomm_tty_connect_confirm(). */	dev_kfree_skb(skb);}/* * Function ircomm_ttp_connect_indication (instance, sap, qos, max_sdu_size, *                                         max_header_size, skb) * *     * */void ircomm_ttp_connect_indication(void *instance, void *sap,				   struct qos_info *qos,				   __u32 max_sdu_size,				   __u8 max_header_size,				   struct sk_buff *skb){	struct ircomm_cb *self = (struct ircomm_cb *)instance;	struct ircomm_info info;	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );	ASSERT(self != NULL, return;);	ASSERT(self->magic == IRCOMM_MAGIC, return;);	ASSERT(skb != NULL, return;);	ASSERT(qos != NULL, goto out;);	if (max_sdu_size != TTP_SAR_DISABLE) {		ERROR("%s(), SAR not allowed for IrCOMM!\n", __FUNCTION__);		goto out;	}	info.max_data_size = irttp_get_max_seg_size(self->tsap)		- IRCOMM_HEADER_SIZE;	info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE;	info.qos = qos;	ircomm_do_event(self, IRCOMM_TTP_CONNECT_INDICATION, skb, &info);out:	/* Drop reference count - see ircomm_tty_connect_indication(). */	dev_kfree_skb(skb);}/* * Function ircomm_ttp_disconnect_request (self, userdata, info) * *     * */int ircomm_ttp_disconnect_request(struct ircomm_cb *self, 				  struct sk_buff *userdata, 				  struct ircomm_info *info){	int ret;	/* Don't forget to refcount it - should be NULL anyway */	if(userdata)		skb_get(userdata);	ret = irttp_disconnect_request(self->tsap, userdata, P_NORMAL);	return ret;}/* * Function ircomm_ttp_disconnect_indication (instance, sap, reason, skb) * *     * */void ircomm_ttp_disconnect_indication(void *instance, void *sap, 				      LM_REASON reason,				      struct sk_buff *skb){	struct ircomm_cb *self = (struct ircomm_cb *) instance;	struct ircomm_info info;	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );	ASSERT(self != NULL, return;);	ASSERT(self->magic == IRCOMM_MAGIC, return;);	info.reason = reason;	ircomm_do_event(self, IRCOMM_TTP_DISCONNECT_INDICATION, skb, &info);	/* Drop reference count - see ircomm_tty_disconnect_indication(). */	if(skb)		dev_kfree_skb(skb);}/* * Function ircomm_ttp_flow_indication (instance, sap, cmd) * *    Layer below is telling us to start or stop the flow of data * */void ircomm_ttp_flow_indication(void *instance, void *sap, LOCAL_FLOW cmd){	struct ircomm_cb *self = (struct ircomm_cb *) instance;	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );	ASSERT(self != NULL, return;);	ASSERT(self->magic == IRCOMM_MAGIC, return;);		if (self->notify.flow_indication)		self->notify.flow_indication(self->notify.instance, self, cmd);}