patch-2.2.15 linux/net/irda/ircomm/ircomm_ttp.c

• Lines: 305
• Date: Fri Apr 21 12:47:16 2000
• Orig file: v2.2.14/net/irda/ircomm/ircomm_ttp.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from ../../exclude v2.2.14/net/irda/ircomm/ircomm_ttp.c linux/net/irda/ircomm/ircomm_ttp.c
@@ -0,0 +1,304 @@
+/*********************************************************************
+ *                
+ * 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.
+ *     
+ *     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, __FUNCTION__ "()\n");
+
+	/* 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;
+	strncpy(notify.name, "IrCOMM", NOTIFY_MAX_NAME);
+
+	self->tsap = irttp_open_tsap(LSAP_ANY, DEFAULT_INITIAL_CREDIT,
+				     &notify);
+	if (!self->tsap) {
+		IRDA_DEBUG(0, __FUNCTION__"failed to allocate tsap\n");
+		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, __FUNCTION__ "()\n");
+
+	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 *skb)
+{
+	int ret;
+
+	IRDA_DEBUG(4, __FUNCTION__"()\n");
+	
+	ret = irttp_connect_response(self->tsap, TTP_SAR_DISABLE, skb);
+
+	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, __FUNCTION__"(), clen=%d\n", 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;);
+	skb_push(skb, IRCOMM_HEADER_SIZE);
+
+	skb->data[0] = clen;
+
+	ret = irttp_data_request(self->tsap, skb);
+	if (ret) {
+		ERROR(__FUNCTION__ "(), failed\n");
+		dev_kfree_skb(skb);
+	}
+
+	return ret;
+}
+
+/*
+ * Function ircomm_ttp_data_indication (instance, sap, skb)
+ *
+ *    Incomming 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, __FUNCTION__"()\n");
+	
+	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);
+
+	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, __FUNCTION__"()\n");
+
+	ASSERT(self != NULL, return;);
+	ASSERT(self->magic == IRCOMM_MAGIC, return;);
+	ASSERT(skb != NULL, return;);
+	ASSERT(qos != NULL, return;);
+
+	if (max_sdu_size != TTP_SAR_DISABLE) {
+		ERROR(__FUNCTION__ "(), SAR not allowed for IrCOMM!\n");
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	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);
+}
+
+/*
+ * 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, __FUNCTION__"()\n");
+
+	ASSERT(self != NULL, return;);
+	ASSERT(self->magic == IRCOMM_MAGIC, return;);
+	ASSERT(skb != NULL, return;);
+	ASSERT(qos != NULL, return;);
+
+	if (max_sdu_size != TTP_SAR_DISABLE) {
+		ERROR(__FUNCTION__ "(), SAR not allowed for IrCOMM!\n");
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	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);
+}
+
+/*
+ * 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;
+
+	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, __FUNCTION__"()\n");
+
+	ASSERT(self != NULL, return;);
+	ASSERT(self->magic == IRCOMM_MAGIC, return;);
+
+	info.reason = reason;
+
+	ircomm_do_event(self, IRCOMM_TTP_DISCONNECT_INDICATION, skb, &info);
+}
+
+/*
+ * 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, __FUNCTION__ "()\n");
+
+	ASSERT(self != NULL, return;);
+	ASSERT(self->magic == IRCOMM_MAGIC, return;);
+	
+	if (self->notify.flow_indication)
+		self->notify.flow_indication(self->notify.instance, self, cmd);
+}
+
+