patch-2.4.19 linux-2.4.19/net/bluetooth/hci_conn.c

• Lines: 435
• Date: Fri Aug 2 17:39:46 2002
• Orig file: linux-2.4.18/net/bluetooth/hci_conn.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/net/bluetooth/hci_conn.c linux-2.4.19/net/bluetooth/hci_conn.c
@@ -0,0 +1,434 @@
+/* 
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2000-2001 Qualcomm Incorporated
+
+   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/*
+ * HCI Connection handling.
+ *
+ * $Id: hci_conn.c,v 1.3 2002/06/25 22:03:39 maxk Exp $
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/fcntl.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/interrupt.h>
+#include <linux/notifier.h>
+#include <net/sock.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#ifndef HCI_CORE_DEBUG
+#undef  BT_DBG
+#define BT_DBG( A... )
+#endif
+
+void hci_acl_connect(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct inquiry_entry *ie;
+	create_conn_cp cp;
+
+	BT_DBG("%p", conn);
+
+	conn->state = BT_CONNECT;
+	conn->out   = 1;
+	conn->link_mode = HCI_LM_MASTER;
+
+	memset(&cp, 0, sizeof(cp));
+	bacpy(&cp.bdaddr, &conn->dst);
+
+	if ((ie = inquiry_cache_lookup(hdev, &conn->dst)) &&
+			inquiry_entry_age(ie) > INQUIRY_ENTRY_AGE_MAX) {
+		cp.pscan_rep_mode = ie->info.pscan_rep_mode;
+		cp.pscan_mode     = ie->info.pscan_mode;
+		cp.clock_offset   = ie->info.clock_offset | __cpu_to_le16(0x8000);
+	}
+
+	cp.pkt_type = __cpu_to_le16(hdev->pkt_type & ACL_PTYPE_MASK);
+	if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
+		cp.role_switch	= 0x01;
+	else
+		cp.role_switch	= 0x00;
+		
+	hci_send_cmd(hdev, OGF_LINK_CTL, OCF_CREATE_CONN,
+				CREATE_CONN_CP_SIZE, &cp);
+}
+
+void hci_acl_disconn(struct hci_conn *conn, __u8 reason)
+{
+	disconnect_cp cp;
+
+	BT_DBG("%p", conn);
+
+	conn->state = BT_DISCONN;
+
+	cp.handle = __cpu_to_le16(conn->handle);
+	cp.reason = reason;
+	hci_send_cmd(conn->hdev, OGF_LINK_CTL, OCF_DISCONNECT,
+				DISCONNECT_CP_SIZE, &cp);
+}
+
+void hci_add_sco(struct hci_conn *conn, __u16 handle)
+{
+	struct hci_dev *hdev = conn->hdev;
+	add_sco_cp cp;
+
+	BT_DBG("%p", conn);
+
+	conn->state = BT_CONNECT;
+	conn->out = 1;
+
+	cp.pkt_type = __cpu_to_le16(hdev->pkt_type & SCO_PTYPE_MASK);
+	cp.handle   = __cpu_to_le16(handle);
+
+	hci_send_cmd(hdev, OGF_LINK_CTL, OCF_ADD_SCO, ADD_SCO_CP_SIZE, &cp);
+}
+
+static void hci_conn_timeout(unsigned long arg)
+{
+	struct hci_conn *conn = (void *)arg;
+	struct hci_dev  *hdev = conn->hdev;
+
+	BT_DBG("conn %p state %d", conn, conn->state);
+
+	if (atomic_read(&conn->refcnt))
+		return;
+
+	hci_dev_lock(hdev);
+ 	if (conn->state == BT_CONNECTED)
+		hci_acl_disconn(conn, 0x13);
+	else
+		conn->state = BT_CLOSED;
+	hci_dev_unlock(hdev);
+	return;
+}
+
+static void hci_conn_init_timer(struct hci_conn *conn)
+{
+	init_timer(&conn->timer);
+	conn->timer.function = hci_conn_timeout;
+	conn->timer.data = (unsigned long)conn;
+}
+
+struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
+{
+	struct hci_conn *conn;
+
+	BT_DBG("%s dst %s", hdev->name, batostr(dst));
+
+	if (!(conn = kmalloc(sizeof(struct hci_conn), GFP_ATOMIC)))
+		return NULL;
+	memset(conn, 0, sizeof(struct hci_conn));
+
+	bacpy(&conn->dst, dst);
+	conn->type   = type;
+	conn->hdev   = hdev;
+	conn->state  = BT_OPEN;
+
+	skb_queue_head_init(&conn->data_q);
+	hci_conn_init_timer(conn);
+
+	atomic_set(&conn->refcnt, 0);
+
+	hci_dev_hold(hdev);
+
+	tasklet_disable(&hdev->tx_task);
+	conn_hash_add(hdev, conn);
+	tasklet_enable(&hdev->tx_task);
+
+	return conn;
+}
+
+int hci_conn_del(struct hci_conn *conn)
+{
+	struct hci_dev  *hdev = conn->hdev;
+
+	BT_DBG("%s conn %p handle %d", hdev->name, conn, conn->handle);
+	
+	hci_conn_del_timer(conn);
+
+	if (conn->type == SCO_LINK) {
+		struct hci_conn *acl = conn->link;
+		if (acl) {
+			acl->link = NULL;
+			hci_conn_put(acl);
+		}
+	} else {
+		struct hci_conn *sco = conn->link;
+		if (sco)
+			sco->link = NULL;
+
+		/* Unacked frames */
+		hdev->acl_cnt += conn->sent;
+	}
+
+	tasklet_disable(&hdev->tx_task);
+	conn_hash_del(hdev, conn);
+	tasklet_enable(&hdev->tx_task);
+
+	skb_queue_purge(&conn->data_q);
+
+	hci_dev_put(hdev);
+
+	kfree(conn);
+	return 0;
+}
+
+struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
+{
+	int use_src = bacmp(src, BDADDR_ANY);
+	struct hci_dev *hdev = NULL;
+	struct list_head *p;
+
+	BT_DBG("%s -> %s", batostr(src), batostr(dst));
+
+	spin_lock_bh(&hdev_list_lock);
+
+	list_for_each(p, &hdev_list) {
+		struct hci_dev *d;
+		d = list_entry(p, struct hci_dev, list);
+		
+		if (!test_bit(HCI_UP, &d->flags))
+			continue;
+
+		/* Simple routing: 
+	 	 * 	No source address - find interface with bdaddr != dst 
+	 	 *	Source address 	  - find interface with bdaddr == src 
+	 	 */
+
+		if (use_src) {
+			if (!bacmp(&d->bdaddr, src)) {
+				hdev = d; break;
+			}
+		} else {
+			if (bacmp(&d->bdaddr, dst)) {
+				hdev = d; break;
+			}
+		}
+	}
+
+	if (hdev)
+		hci_dev_hold(hdev);
+
+	spin_unlock_bh(&hdev_list_lock);
+	return hdev;
+}
+
+/* Create SCO or ACL connection.
+ * Device _must_ be locked */
+struct hci_conn * hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst)
+{
+	struct hci_conn *acl;
+
+	BT_DBG("%s dst %s", hdev->name, batostr(dst));
+
+	if (!(acl = conn_hash_lookup_ba(hdev, ACL_LINK, dst))) {
+		if (!(acl = hci_conn_add(hdev, ACL_LINK, dst)))
+			return NULL;
+	}
+
+	hci_conn_hold(acl);
+
+	if (acl->state == BT_OPEN || acl->state == BT_CLOSED)
+		hci_acl_connect(acl);
+
+	if (type == SCO_LINK) {
+		struct hci_conn *sco;
+
+		if (!(sco = conn_hash_lookup_ba(hdev, SCO_LINK, dst))) {
+			if (!(sco = hci_conn_add(hdev, SCO_LINK, dst))) {
+				hci_conn_put(acl);
+				return NULL;
+			}
+		}
+		acl->link = sco;
+		sco->link = acl;
+
+		hci_conn_hold(sco);
+
+		if (acl->state == BT_CONNECTED && 
+				(sco->state == BT_OPEN || sco->state == BT_CLOSED))
+			hci_add_sco(sco, acl->handle);
+
+		return sco;
+	} else {
+		return acl;
+	}
+}
+
+/* Authenticate remote device */
+int hci_conn_auth(struct hci_conn *conn)
+{
+	BT_DBG("conn %p", conn);
+	
+	if (conn->link_mode & HCI_LM_AUTH)
+		return 1;
+	
+	if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) {
+		auth_requested_cp ar;
+		ar.handle = __cpu_to_le16(conn->handle);
+		hci_send_cmd(conn->hdev, OGF_LINK_CTL, OCF_AUTH_REQUESTED,
+				AUTH_REQUESTED_CP_SIZE, &ar);
+	}
+	return 0;
+}
+
+/* Enable encryption */
+int hci_conn_encrypt(struct hci_conn *conn)
+{
+	BT_DBG("conn %p", conn);
+	
+	if (conn->link_mode & HCI_LM_ENCRYPT)
+		return 1;
+	
+	if (test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend))
+		return 0;
+
+	if (hci_conn_auth(conn)) {
+		set_conn_encrypt_cp ce;
+		ce.handle  = __cpu_to_le16(conn->handle);
+		ce.encrypt = 1; 
+		hci_send_cmd(conn->hdev, OGF_LINK_CTL, OCF_SET_CONN_ENCRYPT,
+				SET_CONN_ENCRYPT_CP_SIZE, &ce);
+	}
+	return 0;
+}
+
+/* Drop all connection on the device */
+void hci_conn_hash_flush(struct hci_dev *hdev)
+{
+	struct conn_hash *h = &hdev->conn_hash;
+        struct list_head *p;
+
+	BT_DBG("hdev %s", hdev->name);
+
+	p = h->list.next;
+	while (p != &h->list) {
+		struct hci_conn *c;
+
+		c = list_entry(p, struct hci_conn, list);
+		p = p->next;
+
+		c->state = BT_CLOSED;
+
+		hci_proto_disconn_ind(c, 0x16);
+		hci_conn_del(c);
+	}
+}
+
+int hci_get_conn_list(unsigned long arg)
+{
+	struct hci_conn_list_req req, *cl;
+	struct hci_conn_info *ci;
+	struct hci_dev *hdev;
+	struct list_head *p;
+	int n = 0, size;
+
+	if (copy_from_user(&req, (void *) arg, sizeof(req)))
+		return -EFAULT;
+
+	if (!(hdev = hci_dev_get(req.dev_id)))
+		return -ENODEV;
+
+	size = req.conn_num * sizeof(struct hci_conn_info) + sizeof(req);
+
+	if (verify_area(VERIFY_WRITE, (void *)arg, size))
+		return -EFAULT;
+
+	if (!(cl = (void *) kmalloc(size, GFP_KERNEL)))
+		return -ENOMEM;
+	ci = cl->conn_info;
+
+	hci_dev_lock_bh(hdev);
+	list_for_each(p, &hdev->conn_hash.list) {
+		register struct hci_conn *c;
+		c = list_entry(p, struct hci_conn, list);
+
+		bacpy(&(ci + n)->bdaddr, &c->dst);
+		(ci + n)->handle = c->handle;
+		(ci + n)->type  = c->type;
+		(ci + n)->out   = c->out;
+		(ci + n)->state = c->state;
+		(ci + n)->link_mode = c->link_mode;
+		n++;
+	}
+	hci_dev_unlock_bh(hdev);
+
+	cl->dev_id = hdev->id;
+	cl->conn_num = n;
+	size = n * sizeof(struct hci_conn_info) + sizeof(req);
+
+	hci_dev_put(hdev);
+
+	copy_to_user((void *) arg, cl, size);
+	kfree(cl);
+
+	return 0;
+}
+
+int hci_get_conn_info(struct hci_dev *hdev, unsigned long arg)
+{
+	struct hci_conn_info_req req;
+	struct hci_conn_info ci;
+	struct hci_conn *conn;
+	char *ptr = (void *) arg + sizeof(req);
+
+	if (copy_from_user(&req, (void *) arg, sizeof(req)))
+		return -EFAULT;
+
+	if (verify_area(VERIFY_WRITE, ptr, sizeof(ci)))
+		return -EFAULT;
+
+	hci_dev_lock_bh(hdev);
+	conn = conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
+	if (conn) {
+		bacpy(&ci.bdaddr, &conn->dst);
+		ci.handle = conn->handle;
+		ci.type  = conn->type;
+		ci.out   = conn->out;
+		ci.state = conn->state;
+		ci.link_mode = conn->link_mode;
+	}
+	hci_dev_unlock_bh(hdev);
+
+	if (!conn)
+		return -ENOENT;
+
+	copy_to_user(ptr, &ci, sizeof(ci));
+	return 0;
+}