hci_event.c

Linux嵌入式平台蓝牙协议栈软件

/* 
   BlueZ - Bluetooth protocol stack for Linux
   Copyright (C) 2000-2001 Qualcomm Incorporated

   Written 2000,2001 by Maxim Krasnyansky <[e-mail]>

   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.
*/

/* Bluetooth HCI event handling. */

#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 CONFIG_BT_HCI_CORE_DEBUG
#undef  BT_DBG
#define BT_DBG(D...)
#endif

/* Handle HCI Event packets */

/* Command Complete OGF LINK_CTL  */
static void hci_cc_link_ctl(struct hci_dev *hdev, __u16 ocf, struct sk_buff *skb)
{
	__u8 status;

	BT_DBG("%s ocf 0x%x", hdev->name, ocf);

	switch (ocf) {
	case OCF_INQUIRY_CANCEL:
		status = *((__u8 *) skb->data);

		if (status) {
			BT_DBG("%s Inquiry cancel error: status 0x%x", hdev->name, status);
		} else {
			clear_bit(HCI_INQUIRY, &hdev->flags);
			hci_req_complete(hdev, status);
		}
		break;

	default:
		BT_DBG("%s Command complete: ogf LINK_CTL ocf %x", hdev->name, ocf);
		break;
	}
}

/* Command Complete OGF LINK_POLICY  */
static void hci_cc_link_policy(struct hci_dev *hdev, __u16 ocf, struct sk_buff *skb)
{
	struct hci_conn *conn;
	struct hci_rp_role_discovery *rd;

	BT_DBG("%s ocf 0x%x", hdev->name, ocf);

	switch (ocf) {
	case OCF_ROLE_DISCOVERY: 
		rd = (void *) skb->data;

		if (rd->status)
			break;

		hci_dev_lock(hdev);

		conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rd->handle));
		if (conn) {
			if (rd->role)
				conn->link_mode &= ~HCI_LM_MASTER;
			else
				conn->link_mode |= HCI_LM_MASTER;
		}
			
		hci_dev_unlock(hdev);
		break;

	default:
		BT_DBG("%s: Command complete: ogf LINK_POLICY ocf %x", 
				hdev->name, ocf);
		break;
	}
}

/* Command Complete OGF HOST_CTL  */
static void hci_cc_host_ctl(struct hci_dev *hdev, __u16 ocf, struct sk_buff *skb)
{
	__u8 status, param;
	__u16 setting;
	struct hci_rp_read_voice_setting *vs;
	void *sent;

	BT_DBG("%s ocf 0x%x", hdev->name, ocf);

	switch (ocf) {
	case OCF_RESET:
		status = *((__u8 *) skb->data);
		hci_req_complete(hdev, status);
		break;

	case OCF_SET_EVENT_FLT:
		status = *((__u8 *) skb->data);
		if (status) {
			BT_DBG("%s SET_EVENT_FLT failed %d", hdev->name, status);
		} else {
			BT_DBG("%s SET_EVENT_FLT succeseful", hdev->name);
		}
		break;

	case OCF_WRITE_AUTH_ENABLE:
		sent = hci_sent_cmd_data(hdev, OGF_HOST_CTL, OCF_WRITE_AUTH_ENABLE);
		if (!sent)
			break;

		status = *((__u8 *) skb->data);
		param  = *((__u8 *) sent);

		if (!status) {
			if (param == AUTH_ENABLED)
				set_bit(HCI_AUTH, &hdev->flags);
			else
				clear_bit(HCI_AUTH, &hdev->flags);
		}
		hci_req_complete(hdev, status);
		break;

	case OCF_WRITE_ENCRYPT_MODE:
		sent = hci_sent_cmd_data(hdev, OGF_HOST_CTL, OCF_WRITE_ENCRYPT_MODE);
		if (!sent)
			break;

		status = *((__u8 *) skb->data);
		param  = *((__u8 *) sent);

		if (!status) {
			if (param)
				set_bit(HCI_ENCRYPT, &hdev->flags);
			else
				clear_bit(HCI_ENCRYPT, &hdev->flags);
		}
		hci_req_complete(hdev, status);
		break;

	case OCF_WRITE_CA_TIMEOUT:
		status = *((__u8 *) skb->data);
		if (status) {
			BT_DBG("%s OCF_WRITE_CA_TIMEOUT failed %d", hdev->name, status);
		} else {
			BT_DBG("%s OCF_WRITE_CA_TIMEOUT succeseful", hdev->name);
		}
		break;

	case OCF_WRITE_PG_TIMEOUT:
		status = *((__u8 *) skb->data);
		if (status) {
			BT_DBG("%s OCF_WRITE_PG_TIMEOUT failed %d", hdev->name, status);
		} else {
			BT_DBG("%s: OCF_WRITE_PG_TIMEOUT succeseful", hdev->name);
		}
		break;

	case OCF_WRITE_SCAN_ENABLE:
		sent = hci_sent_cmd_data(hdev, OGF_HOST_CTL, OCF_WRITE_SCAN_ENABLE);
		if (!sent)
			break;

		status = *((__u8 *) skb->data);
		param  = *((__u8 *) sent);

		BT_DBG("param 0x%x", param);

		if (!status) {
			clear_bit(HCI_PSCAN, &hdev->flags);
			clear_bit(HCI_ISCAN, &hdev->flags);
			if (param & SCAN_INQUIRY) 
				set_bit(HCI_ISCAN, &hdev->flags);

			if (param & SCAN_PAGE) 
				set_bit(HCI_PSCAN, &hdev->flags);
		}
		hci_req_complete(hdev, status);
		break;

	case OCF_READ_VOICE_SETTING:
		vs = (struct hci_rp_read_voice_setting *) skb->data;

		if (vs->status) {
			BT_DBG("%s READ_VOICE_SETTING failed %d", hdev->name, vs->status);
			break;
		}

		setting = __le16_to_cpu(vs->voice_setting);

		if (hdev->voice_setting != setting ) {
			hdev->voice_setting = setting;

			BT_DBG("%s: voice setting 0x%04x", hdev->name, setting);

			if (hdev->notify)
				hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
		}
		break;

	case OCF_WRITE_VOICE_SETTING:
		sent = hci_sent_cmd_data(hdev, OGF_HOST_CTL, OCF_WRITE_VOICE_SETTING);
		if (!sent)
			break;

		status = *((__u8 *) skb->data);
		setting = __le16_to_cpu(get_unaligned((__u16 *) sent));

		if (!status && hdev->voice_setting != setting) {
			hdev->voice_setting = setting;

			BT_DBG("%s: voice setting 0x%04x", hdev->name, setting);

			if (hdev->notify)
				hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
		}
		hci_req_complete(hdev, status);
		break;

	case OCF_HOST_BUFFER_SIZE:
		status = *((__u8 *) skb->data);
		if (status) {
			BT_DBG("%s OCF_BUFFER_SIZE failed %d", hdev->name, status);
			hci_req_complete(hdev, status);
		}
		break;

	default:
		BT_DBG("%s Command complete: ogf HOST_CTL ocf %x", hdev->name, ocf);
		break;
	}
}

/* Command Complete OGF INFO_PARAM  */
static void hci_cc_info_param(struct hci_dev *hdev, __u16 ocf, struct sk_buff *skb)
{
	struct hci_rp_read_loc_features *lf;
	struct hci_rp_read_buffer_size *bs;
	struct hci_rp_read_bd_addr *ba;

	BT_DBG("%s ocf 0x%x", hdev->name, ocf);

	switch (ocf) {
	case OCF_READ_LOCAL_FEATURES:
		lf = (struct hci_rp_read_loc_features *) skb->data;

		if (lf->status) {
			BT_DBG("%s READ_LOCAL_FEATURES failed %d", hdev->name, lf->status);
			break;
		}

		memcpy(hdev->features, lf->features, sizeof(hdev->features));

		/* Adjust default settings according to features 
		 * supported by device. */
		if (hdev->features[0] & LMP_3SLOT)
			hdev->pkt_type |= (HCI_DM3 | HCI_DH3);

		if (hdev->features[0] & LMP_5SLOT)
			hdev->pkt_type |= (HCI_DM5 | HCI_DH5);

		if (hdev->features[1] & LMP_HV2)
			hdev->pkt_type |= (HCI_HV2);

		if (hdev->features[1] & LMP_HV3)
			hdev->pkt_type |= (HCI_HV3);

		BT_DBG("%s: features 0x%x 0x%x 0x%x", hdev->name, lf->features[0], lf->features[1], lf->features[2]);

		break;

	case OCF_READ_BUFFER_SIZE:
		bs = (struct hci_rp_read_buffer_size *) skb->data;

		if (bs->status) {
			BT_DBG("%s READ_BUFFER_SIZE failed %d", hdev->name, bs->status);
			hci_req_complete(hdev, bs->status);
			break;
		}

		hdev->acl_mtu  = __le16_to_cpu(bs->acl_mtu);
		hdev->sco_mtu  = bs->sco_mtu ? bs->sco_mtu : 64;
		hdev->acl_pkts = hdev->acl_cnt = __le16_to_cpu(bs->acl_max_pkt);
		hdev->sco_pkts = hdev->sco_cnt = __le16_to_cpu(bs->sco_max_pkt);

		BT_DBG("%s mtu: acl %d, sco %d max_pkt: acl %d, sco %d", hdev->name,
			    hdev->acl_mtu, hdev->sco_mtu, hdev->acl_pkts, hdev->sco_pkts);
		break;

	case OCF_READ_BD_ADDR:
		ba = (struct hci_rp_read_bd_addr *) skb->data;

		if (!ba->status) {
			bacpy(&hdev->bdaddr, &ba->bdaddr);
		} else {
			BT_DBG("%s: READ_BD_ADDR failed %d", hdev->name, ba->status);
		}

		hci_req_complete(hdev, ba->status);
		break;

	default:
		BT_DBG("%s Command complete: ogf INFO_PARAM ocf %x", hdev->name, ocf);
		break;
	}
}

/* Command Status OGF LINK_CTL  */
static inline void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
{
	struct hci_conn *conn;
	struct hci_cp_create_conn *cp = hci_sent_cmd_data(hdev, OGF_LINK_CTL, OCF_CREATE_CONN);

	if (!cp)
		return;

	hci_dev_lock(hdev);

	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);

	BT_DBG("%s status 0x%x bdaddr %s conn %p", hdev->name,
			status, batostr(&cp->bdaddr), conn);

	if (status) {
		if (conn && conn->state == BT_CONNECT) {
			conn->state = BT_CLOSED;
			hci_proto_connect_cfm(conn, status);
			hci_conn_del(conn);
		}
	} else {
		if (!conn) {
			conn = hci_conn_add(hdev, ACL_LINK, &cp->bdaddr);
			if (conn) {
				conn->out = 1;
				conn->link_mode |= HCI_LM_MASTER;
			} else
				BT_ERR("No memmory for new connection");
		}
	}

	hci_dev_unlock(hdev);
}

static void hci_cs_link_ctl(struct hci_dev *hdev, __u16 ocf, __u8 status)
{
	BT_DBG("%s ocf 0x%x", hdev->name, ocf);

	switch (ocf) {
	case OCF_CREATE_CONN:
		hci_cs_create_conn(hdev, status);
		break;

	case OCF_ADD_SCO:
		if (status) {
			struct hci_conn *acl, *sco;
			struct hci_cp_add_sco *cp = hci_sent_cmd_data(hdev, OGF_LINK_CTL, OCF_ADD_SCO);
			__u16 handle;

			if (!cp)
				break;

			handle = __le16_to_cpu(cp->handle);

			BT_DBG("%s Add SCO error: handle %d status 0x%x", hdev->name, handle, status);

			hci_dev_lock(hdev);
	
			acl = hci_conn_hash_lookup_handle(hdev, handle);
			if (acl && (sco = acl->link)) {
				sco->state = BT_CLOSED;

				hci_proto_connect_cfm(sco, status);
				hci_conn_del(sco);
			}

			hci_dev_unlock(hdev);
		}
		break;

	case OCF_INQUIRY:
		if (status) {
			BT_DBG("%s Inquiry error: status 0x%x", hdev->name, status);
			hci_req_complete(hdev, status);
		} else {
			set_bit(HCI_INQUIRY, &hdev->flags);
		}
		break;

	default:
		BT_DBG("%s Command status: ogf LINK_CTL ocf %x status %d", 
			hdev->name, ocf, status);
		break;
	}
}

/* Command Status OGF LINK_POLICY */
static void hci_cs_link_policy(struct hci_dev *hdev, __u16 ocf, __u8 status)
{
	BT_DBG("%s ocf 0x%x", hdev->name, ocf);

	switch (ocf) {
	default:
		BT_DBG("%s Command status: ogf HOST_POLICY ocf %x", hdev->name, ocf);
		break;
	}
}

/* Command Status OGF HOST_CTL */
static void hci_cs_host_ctl(struct hci_dev *hdev, __u16 ocf, __u8 status)
{
	BT_DBG("%s ocf 0x%x", hdev->name, ocf);

	switch (ocf) {
	default:
		BT_DBG("%s Command status: ogf HOST_CTL ocf %x", hdev->name, ocf);
		break;
	}
}

/* Command Status OGF INFO_PARAM  */
static void hci_cs_info_param(struct hci_dev *hdev, __u16 ocf, __u8 status)
{
	BT_DBG("%s: hci_cs_info_param: ocf 0x%x", hdev->name, ocf);

	switch (ocf) {
	default:
		BT_DBG("%s Command status: ogf INFO_PARAM ocf %x", hdev->name, ocf);
		break;
	}
}

/* Inquiry Complete */
static inline void hci_inquiry_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
{