patch-2.2.6 linux/net/irda/discovery.c

• Lines: 246
• Date: Thu Apr 15 05:42:42 1999
• Orig file: v2.2.5/linux/net/irda/discovery.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.5/linux/net/irda/discovery.c linux/net/irda/discovery.c
@@ -0,0 +1,245 @@
+/*********************************************************************
+ *                
+ * Filename:      discovery.c
+ * Version:       0.1
+ * Description:   Routines for handling discoveries at the IrLMP layer
+ * Status:        Experimental.
+ * Author:        Dag Brattli <dagb@cs.uit.no>
+ * Created at:    Tue Apr  6 15:33:50 1999
+ * Modified at:   Tue Apr  6 20:26:46 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/socket.h>
+#include <linux/irda.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irlmp.h>
+
+#include <net/irda/discovery.h>
+
+/*
+ * Function irlmp_add_discovery (cachelog, discovery)
+ *
+ *    
+ *
+ */
+void irlmp_add_discovery(hashbin_t *cachelog, discovery_t *discovery)
+{
+	discovery_t *old;
+
+	DEBUG(2, __FUNCTION__ "()\n");
+
+	/* Check if we have discovered this device before */
+	old = hashbin_remove(cachelog, discovery->daddr, NULL);
+	if (old)
+		kfree(old);
+
+	/* Insert the new and updated version */
+	hashbin_insert(cachelog, (QUEUE *) discovery, discovery->daddr, NULL);
+}
+
+/*
+ * Function irlmp_add_discovery_log (cachelog, log)
+ *
+ *    
+ *
+ */
+void irlmp_add_discovery_log(hashbin_t *cachelog, hashbin_t *log)
+{
+	discovery_t *discovery;
+
+	DEBUG(2, __FUNCTION__ "()\n");
+
+	/*
+	 *  If log is missing this means that IrLAP was unable to perform the
+	 *  discovery, so restart discovery again with just the half timeout
+	 *  of the normal one.
+	 */
+	if (log == NULL) {
+		/* irlmp_start_discovery_timer(irlmp, 150); */
+		return;
+	}
+
+	discovery = (discovery_t *) hashbin_remove_first(log);
+	while (discovery != NULL) {
+		irlmp_add_discovery(cachelog, discovery);
+
+		discovery = (discovery_t *) hashbin_remove_first(log);
+	}
+	
+	/* Delete the now empty log */
+	hashbin_delete(log, (FREE_FUNC) kfree);
+}
+
+/*
+ * Function irlmp_expire_discoveries (log, saddr, force)
+ *
+ *    Go through all discoveries and expire all that has stayed to long
+ *
+ */
+void irlmp_expire_discoveries(hashbin_t *log, int saddr, int force)
+{
+	discovery_t *discovery, *curr;
+
+	DEBUG(3, __FUNCTION__ "()\n");
+
+	discovery = (discovery_t *) hashbin_get_first(log);
+	while (discovery != NULL) {
+		curr = discovery;
+
+		/* Be sure to be one item ahead */
+		discovery = (discovery_t *) hashbin_get_next(log);
+
+		/* Test if it's time to expire this discovery */
+		if ((curr->saddr == saddr) && (force ||
+		    ((jiffies - curr->timestamp) > DISCOVERY_EXPIRE_TIMEOUT)))
+		{
+			curr = hashbin_remove(log, curr->daddr, NULL);
+			if (curr)
+				kfree(curr);
+		}
+	}
+}
+
+/*
+ * Function irlmp_dump_discoveries (log)
+ *
+ *    Print out all discoveries in log
+ *
+ */
+void irlmp_dump_discoveries(hashbin_t *log)
+{
+	discovery_t *discovery;
+
+	ASSERT(log != NULL, return;);
+
+	discovery = (discovery_t *) hashbin_get_first(log);
+	while (discovery != NULL) {
+		DEBUG(0, "Discovery:\n");
+		DEBUG(0, "  daddr=%08x\n", discovery->daddr);
+		DEBUG(0, "  saddr=%08x\n", discovery->saddr); 
+		DEBUG(0, "  name=%s\n", discovery->info);
+
+		discovery = (discovery_t *) hashbin_get_next(log);
+	}
+}
+
+/*
+ * Function irlmp_find_device (name, saddr)
+ *
+ *    Look through the discovery log at each of the links and try to find 
+ *    the device with the given name. Return daddr and saddr. If saddr is
+ *    specified, that look at that particular link only (not impl).
+ */
+__u32 irlmp_find_device(hashbin_t *cachelog, char *name, __u32 *saddr)
+{
+	discovery_t *d;
+	unsigned long flags;
+
+	spin_lock_irqsave(&irlmp->lock, flags);
+
+	/* Look at all discoveries for that link */
+	d = (discovery_t *) hashbin_get_first(cachelog);
+	while (d != NULL) {
+		DEBUG(1, "Discovery:\n");
+		DEBUG(1, "  daddr=%08x\n", d->daddr);
+		DEBUG(1, "  name=%s\n", d->info);
+		
+		if (strcmp(name, d->info) == 0) {
+			*saddr = d->saddr;
+			
+			spin_unlock_irqrestore(&irlmp->lock, flags);
+			return d->daddr;
+		}
+		d = (discovery_t *) hashbin_get_next(cachelog);
+	}
+
+	spin_unlock_irqrestore(&irlmp->lock, flags);
+
+	return 0;
+}
+
+/*
+ * Function proc_discovery_read (buf, start, offset, len, unused)
+ *
+ *    Print discovery information in /proc file system
+ *
+ */
+int discovery_proc_read(char *buf, char **start, off_t offset, int len, 
+			int unused)
+{
+	discovery_t *discovery;
+	unsigned long flags;
+	hashbin_t *cachelog = irlmp_get_cachelog();
+
+	if (!irlmp)
+		return len;
+
+	len = sprintf(buf, "IrLMP: Discovery log:\n\n");	
+	
+	save_flags(flags);
+	cli();
+	
+	discovery = (discovery_t *) hashbin_get_first(cachelog);
+	while ( discovery != NULL) {
+		len += sprintf( buf+len, "  name: %s,", 
+				discovery->info);
+		
+		len += sprintf( buf+len, " hint: ");
+		if ( discovery->hints.byte[0] & HINT_PNP)
+			len += sprintf( buf+len, "PnP Compatible ");
+		if ( discovery->hints.byte[0] & HINT_PDA)
+			len += sprintf( buf+len, "PDA/Palmtop ");
+		if ( discovery->hints.byte[0] & HINT_COMPUTER)
+			len += sprintf( buf+len, "Computer ");
+		if ( discovery->hints.byte[0] & HINT_PRINTER)
+			len += sprintf( buf+len, "Printer ");
+		if ( discovery->hints.byte[0] & HINT_MODEM)
+			len += sprintf( buf+len, "Modem ");
+		if ( discovery->hints.byte[0] & HINT_FAX)
+			len += sprintf( buf+len, "Fax ");
+		if ( discovery->hints.byte[0] & HINT_LAN)
+			len += sprintf( buf+len, "LAN Access ");
+		
+		if ( discovery->hints.byte[1] & HINT_TELEPHONY)
+			len += sprintf( buf+len, "Telephony ");
+		if ( discovery->hints.byte[1] & HINT_FILE_SERVER)
+			len += sprintf( buf+len, "File Server ");       
+		if ( discovery->hints.byte[1] & HINT_COMM)
+			len += sprintf( buf+len, "IrCOMM ");
+		if ( discovery->hints.byte[1] & HINT_OBEX)
+			len += sprintf( buf+len, "IrOBEX ");
+		
+		len += sprintf(buf+len, ", saddr: 0x%08x", 
+			       discovery->saddr);
+
+		len += sprintf(buf+len, ", daddr: 0x%08x\n", 
+			       discovery->daddr);
+		
+		len += sprintf( buf+len, "\n");
+		
+		discovery = (discovery_t *) hashbin_get_next(cachelog);
+	}
+	restore_flags(flags);
+
+	return len;
+}