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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /include/net/irda/discovery.h
Initial import
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+/*********************************************************************
+ *
+ * Filename: discovery.h
+ * Version:
+ * Description:
+ * Status: Experimental.
+ * Author: Dag Brattli <dagb@cs.uit.no>
+ * Created at: Tue Apr 6 16:53:53 1999
+ * Modified at: Tue Oct 5 10:05:10 1999
+ * Modified by: Dag Brattli <dagb@cs.uit.no>
+ *
+ * Copyright (c) 1999 Dag Brattli, All Rights Reserved.
+ * Copyright (c) 2000-2002 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, see <http://www.gnu.org/licenses/>.
+ *
+ ********************************************************************/
+
+#ifndef DISCOVERY_H
+#define DISCOVERY_H
+
+#include <asm/param.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irqueue.h> /* irda_queue_t */
+#include <net/irda/irlap_event.h> /* LAP_REASON */
+
+#define DISCOVERY_EXPIRE_TIMEOUT (2*sysctl_discovery_timeout*HZ)
+#define DISCOVERY_DEFAULT_SLOTS 0
+
+/*
+ * This type is used by the protocols that transmit 16 bits words in
+ * little endian format. A little endian machine stores MSB of word in
+ * byte[1] and LSB in byte[0]. A big endian machine stores MSB in byte[0]
+ * and LSB in byte[1].
+ *
+ * This structure is used in the code for things that are endian neutral
+ * but that fit in a word so that we can manipulate them efficiently.
+ * By endian neutral, I mean things that are really an array of bytes,
+ * and always used as such, for example the hint bits. Jean II
+ */
+typedef union {
+ __u16 word;
+ __u8 byte[2];
+} __u16_host_order;
+
+/* Types of discovery */
+typedef enum {
+ DISCOVERY_LOG, /* What's in our discovery log */
+ DISCOVERY_ACTIVE, /* Doing our own discovery on the medium */
+ DISCOVERY_PASSIVE, /* Peer doing discovery on the medium */
+ EXPIRY_TIMEOUT, /* Entry expired due to timeout */
+} DISCOVERY_MODE;
+
+#define NICKNAME_MAX_LEN 21
+
+/* Basic discovery information about a peer */
+typedef struct irda_device_info discinfo_t; /* linux/irda.h */
+
+/*
+ * The DISCOVERY structure is used for both discovery requests and responses
+ */
+typedef struct discovery_t {
+ irda_queue_t q; /* Must be first! */
+
+ discinfo_t data; /* Basic discovery information */
+ int name_len; /* Length of nickname */
+
+ LAP_REASON condition; /* More info about the discovery */
+ int gen_addr_bit; /* Need to generate a new device
+ * address? */
+ int nslots; /* Number of slots to use when
+ * discovering */
+ unsigned long timestamp; /* Last time discovered */
+ unsigned long firststamp; /* First time discovered */
+} discovery_t;
+
+void irlmp_add_discovery(hashbin_t *cachelog, discovery_t *discovery);
+void irlmp_add_discovery_log(hashbin_t *cachelog, hashbin_t *log);
+void irlmp_expire_discoveries(hashbin_t *log, __u32 saddr, int force);
+struct irda_device_info *irlmp_copy_discoveries(hashbin_t *log, int *pn,
+ __u16 mask, int old_entries);
+
+#endif