![Andrei Emeltchenko](/assets/img/avatar_default.png)
When refcnt reaches zero disconnect timeout will run and hci_conn will be disconnected. Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
1030 lines
24 KiB
C
1030 lines
24 KiB
C
/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
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Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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/* Bluetooth HCI connection handling. */
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#include <linux/export.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include <net/bluetooth/a2mp.h>
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#include <net/bluetooth/smp.h>
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static void hci_le_create_connection(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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struct hci_cp_le_create_conn cp;
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conn->state = BT_CONNECT;
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conn->out = true;
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conn->link_mode |= HCI_LM_MASTER;
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conn->sec_level = BT_SECURITY_LOW;
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memset(&cp, 0, sizeof(cp));
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cp.scan_interval = __constant_cpu_to_le16(0x0060);
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cp.scan_window = __constant_cpu_to_le16(0x0030);
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bacpy(&cp.peer_addr, &conn->dst);
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cp.peer_addr_type = conn->dst_type;
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cp.conn_interval_min = __constant_cpu_to_le16(0x0028);
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cp.conn_interval_max = __constant_cpu_to_le16(0x0038);
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cp.supervision_timeout = __constant_cpu_to_le16(0x002a);
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cp.min_ce_len = __constant_cpu_to_le16(0x0000);
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cp.max_ce_len = __constant_cpu_to_le16(0x0000);
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hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
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}
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static void hci_le_create_connection_cancel(struct hci_conn *conn)
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{
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hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL);
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}
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static void hci_acl_create_connection(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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struct inquiry_entry *ie;
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struct hci_cp_create_conn cp;
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BT_DBG("hcon %p", conn);
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conn->state = BT_CONNECT;
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conn->out = true;
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conn->link_mode = HCI_LM_MASTER;
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conn->attempt++;
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conn->link_policy = hdev->link_policy;
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memset(&cp, 0, sizeof(cp));
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bacpy(&cp.bdaddr, &conn->dst);
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cp.pscan_rep_mode = 0x02;
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ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
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if (ie) {
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if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
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cp.pscan_rep_mode = ie->data.pscan_rep_mode;
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cp.pscan_mode = ie->data.pscan_mode;
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cp.clock_offset = ie->data.clock_offset |
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__constant_cpu_to_le16(0x8000);
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}
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memcpy(conn->dev_class, ie->data.dev_class, 3);
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if (ie->data.ssp_mode > 0)
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set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
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}
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cp.pkt_type = cpu_to_le16(conn->pkt_type);
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if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER))
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cp.role_switch = 0x01;
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else
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cp.role_switch = 0x00;
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hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
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}
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static void hci_acl_create_connection_cancel(struct hci_conn *conn)
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{
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struct hci_cp_create_conn_cancel cp;
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BT_DBG("hcon %p", conn);
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if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2)
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return;
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bacpy(&cp.bdaddr, &conn->dst);
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hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp);
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}
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void hci_acl_disconn(struct hci_conn *conn, __u8 reason)
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{
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struct hci_cp_disconnect cp;
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BT_DBG("hcon %p", conn);
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conn->state = BT_DISCONN;
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cp.handle = cpu_to_le16(conn->handle);
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cp.reason = reason;
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hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp);
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}
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static void hci_amp_disconn(struct hci_conn *conn, __u8 reason)
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{
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struct hci_cp_disconn_phy_link cp;
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BT_DBG("hcon %p", conn);
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conn->state = BT_DISCONN;
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cp.phy_handle = HCI_PHY_HANDLE(conn->handle);
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cp.reason = reason;
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hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK,
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sizeof(cp), &cp);
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}
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static void hci_add_sco(struct hci_conn *conn, __u16 handle)
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{
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struct hci_dev *hdev = conn->hdev;
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struct hci_cp_add_sco cp;
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BT_DBG("hcon %p", conn);
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conn->state = BT_CONNECT;
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conn->out = true;
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conn->attempt++;
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cp.handle = cpu_to_le16(handle);
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cp.pkt_type = cpu_to_le16(conn->pkt_type);
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hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
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}
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void hci_setup_sync(struct hci_conn *conn, __u16 handle)
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{
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struct hci_dev *hdev = conn->hdev;
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struct hci_cp_setup_sync_conn cp;
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BT_DBG("hcon %p", conn);
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conn->state = BT_CONNECT;
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conn->out = true;
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conn->attempt++;
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cp.handle = cpu_to_le16(handle);
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cp.pkt_type = cpu_to_le16(conn->pkt_type);
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cp.tx_bandwidth = __constant_cpu_to_le32(0x00001f40);
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cp.rx_bandwidth = __constant_cpu_to_le32(0x00001f40);
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cp.max_latency = __constant_cpu_to_le16(0xffff);
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cp.voice_setting = cpu_to_le16(hdev->voice_setting);
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cp.retrans_effort = 0xff;
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hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp);
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}
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void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
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u16 latency, u16 to_multiplier)
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{
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struct hci_cp_le_conn_update cp;
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struct hci_dev *hdev = conn->hdev;
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memset(&cp, 0, sizeof(cp));
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cp.handle = cpu_to_le16(conn->handle);
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cp.conn_interval_min = cpu_to_le16(min);
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cp.conn_interval_max = cpu_to_le16(max);
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cp.conn_latency = cpu_to_le16(latency);
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cp.supervision_timeout = cpu_to_le16(to_multiplier);
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cp.min_ce_len = __constant_cpu_to_le16(0x0001);
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cp.max_ce_len = __constant_cpu_to_le16(0x0001);
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hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
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}
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void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
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__u8 ltk[16])
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{
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struct hci_dev *hdev = conn->hdev;
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struct hci_cp_le_start_enc cp;
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BT_DBG("hcon %p", conn);
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memset(&cp, 0, sizeof(cp));
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cp.handle = cpu_to_le16(conn->handle);
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memcpy(cp.ltk, ltk, sizeof(cp.ltk));
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cp.ediv = ediv;
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memcpy(cp.rand, rand, sizeof(cp.rand));
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hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
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}
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/* Device _must_ be locked */
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void hci_sco_setup(struct hci_conn *conn, __u8 status)
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{
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struct hci_conn *sco = conn->link;
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if (!sco)
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return;
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BT_DBG("hcon %p", conn);
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if (!status) {
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if (lmp_esco_capable(conn->hdev))
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hci_setup_sync(sco, conn->handle);
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else
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hci_add_sco(sco, conn->handle);
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} else {
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hci_proto_connect_cfm(sco, status);
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hci_conn_del(sco);
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}
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}
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static void hci_conn_disconnect(struct hci_conn *conn)
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{
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__u8 reason = hci_proto_disconn_ind(conn);
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switch (conn->type) {
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case ACL_LINK:
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hci_acl_disconn(conn, reason);
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break;
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case AMP_LINK:
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hci_amp_disconn(conn, reason);
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break;
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}
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}
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static void hci_conn_timeout(struct work_struct *work)
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{
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struct hci_conn *conn = container_of(work, struct hci_conn,
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disc_work.work);
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BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
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if (atomic_read(&conn->refcnt))
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return;
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switch (conn->state) {
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case BT_CONNECT:
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case BT_CONNECT2:
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if (conn->out) {
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if (conn->type == ACL_LINK)
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hci_acl_create_connection_cancel(conn);
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else if (conn->type == LE_LINK)
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hci_le_create_connection_cancel(conn);
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}
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break;
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case BT_CONFIG:
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case BT_CONNECTED:
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hci_conn_disconnect(conn);
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break;
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default:
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conn->state = BT_CLOSED;
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break;
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}
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}
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/* Enter sniff mode */
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static void hci_conn_enter_sniff_mode(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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BT_DBG("hcon %p mode %d", conn, conn->mode);
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if (test_bit(HCI_RAW, &hdev->flags))
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return;
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if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
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return;
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if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
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return;
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if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
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struct hci_cp_sniff_subrate cp;
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cp.handle = cpu_to_le16(conn->handle);
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cp.max_latency = __constant_cpu_to_le16(0);
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cp.min_remote_timeout = __constant_cpu_to_le16(0);
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cp.min_local_timeout = __constant_cpu_to_le16(0);
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hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
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}
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if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
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struct hci_cp_sniff_mode cp;
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cp.handle = cpu_to_le16(conn->handle);
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cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
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cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
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cp.attempt = __constant_cpu_to_le16(4);
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cp.timeout = __constant_cpu_to_le16(1);
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hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
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}
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}
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static void hci_conn_idle(unsigned long arg)
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{
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struct hci_conn *conn = (void *) arg;
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BT_DBG("hcon %p mode %d", conn, conn->mode);
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hci_conn_enter_sniff_mode(conn);
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}
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static void hci_conn_auto_accept(unsigned long arg)
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{
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struct hci_conn *conn = (void *) arg;
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struct hci_dev *hdev = conn->hdev;
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hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
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&conn->dst);
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}
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struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
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{
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struct hci_conn *conn;
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BT_DBG("%s dst %pMR", hdev->name, dst);
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conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL);
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if (!conn)
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return NULL;
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bacpy(&conn->dst, dst);
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conn->hdev = hdev;
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conn->type = type;
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conn->mode = HCI_CM_ACTIVE;
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conn->state = BT_OPEN;
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conn->auth_type = HCI_AT_GENERAL_BONDING;
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conn->io_capability = hdev->io_capability;
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conn->remote_auth = 0xff;
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conn->key_type = 0xff;
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set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
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conn->disc_timeout = HCI_DISCONN_TIMEOUT;
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switch (type) {
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case ACL_LINK:
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conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
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break;
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case SCO_LINK:
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if (lmp_esco_capable(hdev))
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conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
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(hdev->esco_type & EDR_ESCO_MASK);
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else
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conn->pkt_type = hdev->pkt_type & SCO_PTYPE_MASK;
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break;
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case ESCO_LINK:
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conn->pkt_type = hdev->esco_type & ~EDR_ESCO_MASK;
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break;
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}
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skb_queue_head_init(&conn->data_q);
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INIT_LIST_HEAD(&conn->chan_list);
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INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
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setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn);
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setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept,
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(unsigned long) conn);
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atomic_set(&conn->refcnt, 0);
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hci_dev_hold(hdev);
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hci_conn_hash_add(hdev, conn);
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if (hdev->notify)
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hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
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atomic_set(&conn->devref, 0);
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hci_conn_init_sysfs(conn);
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return conn;
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}
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int hci_conn_del(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
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del_timer(&conn->idle_timer);
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cancel_delayed_work_sync(&conn->disc_work);
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del_timer(&conn->auto_accept_timer);
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if (conn->type == ACL_LINK) {
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struct hci_conn *sco = conn->link;
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if (sco)
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sco->link = NULL;
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/* Unacked frames */
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hdev->acl_cnt += conn->sent;
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} else if (conn->type == LE_LINK) {
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if (hdev->le_pkts)
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hdev->le_cnt += conn->sent;
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else
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hdev->acl_cnt += conn->sent;
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} else {
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struct hci_conn *acl = conn->link;
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if (acl) {
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acl->link = NULL;
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hci_conn_put(acl);
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}
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}
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hci_chan_list_flush(conn);
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if (conn->amp_mgr)
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amp_mgr_put(conn->amp_mgr);
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hci_conn_hash_del(hdev, conn);
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if (hdev->notify)
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hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
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skb_queue_purge(&conn->data_q);
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hci_conn_put_device(conn);
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hci_dev_put(hdev);
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if (conn->handle == 0)
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kfree(conn);
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return 0;
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}
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struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
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{
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int use_src = bacmp(src, BDADDR_ANY);
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struct hci_dev *hdev = NULL, *d;
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BT_DBG("%pMR -> %pMR", src, dst);
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read_lock(&hci_dev_list_lock);
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list_for_each_entry(d, &hci_dev_list, list) {
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if (!test_bit(HCI_UP, &d->flags) ||
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test_bit(HCI_RAW, &d->flags) ||
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d->dev_type != HCI_BREDR)
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continue;
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/* Simple routing:
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* No source address - find interface with bdaddr != dst
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* Source address - find interface with bdaddr == src
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*/
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if (use_src) {
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if (!bacmp(&d->bdaddr, src)) {
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hdev = d; break;
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}
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} else {
|
|
if (bacmp(&d->bdaddr, dst)) {
|
|
hdev = d; break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (hdev)
|
|
hdev = hci_dev_hold(hdev);
|
|
|
|
read_unlock(&hci_dev_list_lock);
|
|
return hdev;
|
|
}
|
|
EXPORT_SYMBOL(hci_get_route);
|
|
|
|
static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
|
|
u8 dst_type, u8 sec_level, u8 auth_type)
|
|
{
|
|
struct hci_conn *le;
|
|
|
|
if (test_bit(HCI_LE_PERIPHERAL, &hdev->flags))
|
|
return ERR_PTR(-ENOTSUPP);
|
|
|
|
le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst);
|
|
if (!le) {
|
|
le = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
|
|
if (le)
|
|
return ERR_PTR(-EBUSY);
|
|
|
|
le = hci_conn_add(hdev, LE_LINK, dst);
|
|
if (!le)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
le->dst_type = bdaddr_to_le(dst_type);
|
|
hci_le_create_connection(le);
|
|
}
|
|
|
|
le->pending_sec_level = sec_level;
|
|
le->auth_type = auth_type;
|
|
|
|
hci_conn_hold(le);
|
|
|
|
return le;
|
|
}
|
|
|
|
static struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
|
|
u8 sec_level, u8 auth_type)
|
|
{
|
|
struct hci_conn *acl;
|
|
|
|
acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
|
|
if (!acl) {
|
|
acl = hci_conn_add(hdev, ACL_LINK, dst);
|
|
if (!acl)
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
hci_conn_hold(acl);
|
|
|
|
if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
|
|
acl->sec_level = BT_SECURITY_LOW;
|
|
acl->pending_sec_level = sec_level;
|
|
acl->auth_type = auth_type;
|
|
hci_acl_create_connection(acl);
|
|
}
|
|
|
|
return acl;
|
|
}
|
|
|
|
static struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type,
|
|
bdaddr_t *dst, u8 sec_level, u8 auth_type)
|
|
{
|
|
struct hci_conn *acl;
|
|
struct hci_conn *sco;
|
|
|
|
acl = hci_connect_acl(hdev, dst, sec_level, auth_type);
|
|
if (IS_ERR(acl))
|
|
return acl;
|
|
|
|
sco = hci_conn_hash_lookup_ba(hdev, type, dst);
|
|
if (!sco) {
|
|
sco = hci_conn_add(hdev, type, dst);
|
|
if (!sco) {
|
|
hci_conn_put(acl);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
}
|
|
|
|
acl->link = sco;
|
|
sco->link = acl;
|
|
|
|
hci_conn_hold(sco);
|
|
|
|
if (acl->state == BT_CONNECTED &&
|
|
(sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
|
|
set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
|
|
hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
|
|
|
|
if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
|
|
/* defer SCO setup until mode change completed */
|
|
set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
|
|
return sco;
|
|
}
|
|
|
|
hci_sco_setup(acl, 0x00);
|
|
}
|
|
|
|
return sco;
|
|
}
|
|
|
|
/* Create SCO, ACL or LE connection. */
|
|
struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
|
|
__u8 dst_type, __u8 sec_level, __u8 auth_type)
|
|
{
|
|
BT_DBG("%s dst %pMR type 0x%x", hdev->name, dst, type);
|
|
|
|
switch (type) {
|
|
case LE_LINK:
|
|
return hci_connect_le(hdev, dst, dst_type, sec_level, auth_type);
|
|
case ACL_LINK:
|
|
return hci_connect_acl(hdev, dst, sec_level, auth_type);
|
|
case SCO_LINK:
|
|
case ESCO_LINK:
|
|
return hci_connect_sco(hdev, type, dst, sec_level, auth_type);
|
|
}
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
/* Check link security requirement */
|
|
int hci_conn_check_link_mode(struct hci_conn *conn)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Authenticate remote device */
|
|
static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (conn->pending_sec_level > sec_level)
|
|
sec_level = conn->pending_sec_level;
|
|
|
|
if (sec_level > conn->sec_level)
|
|
conn->pending_sec_level = sec_level;
|
|
else if (conn->link_mode & HCI_LM_AUTH)
|
|
return 1;
|
|
|
|
/* Make sure we preserve an existing MITM requirement*/
|
|
auth_type |= (conn->auth_type & 0x01);
|
|
|
|
conn->auth_type = auth_type;
|
|
|
|
if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
|
|
struct hci_cp_auth_requested cp;
|
|
|
|
/* encrypt must be pending if auth is also pending */
|
|
set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
|
|
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
|
|
sizeof(cp), &cp);
|
|
if (conn->key_type != 0xff)
|
|
set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Encrypt the the link */
|
|
static void hci_conn_encrypt(struct hci_conn *conn)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
|
|
struct hci_cp_set_conn_encrypt cp;
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
cp.encrypt = 0x01;
|
|
hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
|
|
&cp);
|
|
}
|
|
}
|
|
|
|
/* Enable security */
|
|
int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (conn->type == LE_LINK)
|
|
return smp_conn_security(conn, sec_level);
|
|
|
|
/* For sdp we don't need the link key. */
|
|
if (sec_level == BT_SECURITY_SDP)
|
|
return 1;
|
|
|
|
/* For non 2.1 devices and low security level we don't need the link
|
|
key. */
|
|
if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
|
|
return 1;
|
|
|
|
/* For other security levels we need the link key. */
|
|
if (!(conn->link_mode & HCI_LM_AUTH))
|
|
goto auth;
|
|
|
|
/* An authenticated combination key has sufficient security for any
|
|
security level. */
|
|
if (conn->key_type == HCI_LK_AUTH_COMBINATION)
|
|
goto encrypt;
|
|
|
|
/* An unauthenticated combination key has sufficient security for
|
|
security level 1 and 2. */
|
|
if (conn->key_type == HCI_LK_UNAUTH_COMBINATION &&
|
|
(sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
|
|
goto encrypt;
|
|
|
|
/* A combination key has always sufficient security for the security
|
|
levels 1 or 2. High security level requires the combination key
|
|
is generated using maximum PIN code length (16).
|
|
For pre 2.1 units. */
|
|
if (conn->key_type == HCI_LK_COMBINATION &&
|
|
(sec_level != BT_SECURITY_HIGH || conn->pin_length == 16))
|
|
goto encrypt;
|
|
|
|
auth:
|
|
if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
|
|
return 0;
|
|
|
|
if (!hci_conn_auth(conn, sec_level, auth_type))
|
|
return 0;
|
|
|
|
encrypt:
|
|
if (conn->link_mode & HCI_LM_ENCRYPT)
|
|
return 1;
|
|
|
|
hci_conn_encrypt(conn);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_security);
|
|
|
|
/* Check secure link requirement */
|
|
int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (sec_level != BT_SECURITY_HIGH)
|
|
return 1; /* Accept if non-secure is required */
|
|
|
|
if (conn->sec_level == BT_SECURITY_HIGH)
|
|
return 1;
|
|
|
|
return 0; /* Reject not secure link */
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_check_secure);
|
|
|
|
/* Change link key */
|
|
int hci_conn_change_link_key(struct hci_conn *conn)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
|
|
struct hci_cp_change_conn_link_key cp;
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY,
|
|
sizeof(cp), &cp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Switch role */
|
|
int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
|
|
{
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
if (!role && conn->link_mode & HCI_LM_MASTER)
|
|
return 1;
|
|
|
|
if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
|
|
struct hci_cp_switch_role cp;
|
|
bacpy(&cp.bdaddr, &conn->dst);
|
|
cp.role = role;
|
|
hci_send_cmd(conn->hdev, HCI_OP_SWITCH_ROLE, sizeof(cp), &cp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_switch_role);
|
|
|
|
/* Enter active mode */
|
|
void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
|
|
BT_DBG("hcon %p mode %d", conn, conn->mode);
|
|
|
|
if (test_bit(HCI_RAW, &hdev->flags))
|
|
return;
|
|
|
|
if (conn->mode != HCI_CM_SNIFF)
|
|
goto timer;
|
|
|
|
if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
|
|
goto timer;
|
|
|
|
if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
|
|
struct hci_cp_exit_sniff_mode cp;
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
|
|
}
|
|
|
|
timer:
|
|
if (hdev->idle_timeout > 0)
|
|
mod_timer(&conn->idle_timer,
|
|
jiffies + msecs_to_jiffies(hdev->idle_timeout));
|
|
}
|
|
|
|
/* Drop all connection on the device */
|
|
void hci_conn_hash_flush(struct hci_dev *hdev)
|
|
{
|
|
struct hci_conn_hash *h = &hdev->conn_hash;
|
|
struct hci_conn *c, *n;
|
|
|
|
BT_DBG("hdev %s", hdev->name);
|
|
|
|
list_for_each_entry_safe(c, n, &h->list, list) {
|
|
c->state = BT_CLOSED;
|
|
|
|
hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
|
|
hci_conn_del(c);
|
|
}
|
|
}
|
|
|
|
/* Check pending connect attempts */
|
|
void hci_conn_check_pending(struct hci_dev *hdev)
|
|
{
|
|
struct hci_conn *conn;
|
|
|
|
BT_DBG("hdev %s", hdev->name);
|
|
|
|
hci_dev_lock(hdev);
|
|
|
|
conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
|
|
if (conn)
|
|
hci_acl_create_connection(conn);
|
|
|
|
hci_dev_unlock(hdev);
|
|
}
|
|
|
|
void hci_conn_hold_device(struct hci_conn *conn)
|
|
{
|
|
atomic_inc(&conn->devref);
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_hold_device);
|
|
|
|
void hci_conn_put_device(struct hci_conn *conn)
|
|
{
|
|
if (atomic_dec_and_test(&conn->devref))
|
|
hci_conn_del_sysfs(conn);
|
|
}
|
|
EXPORT_SYMBOL(hci_conn_put_device);
|
|
|
|
int hci_get_conn_list(void __user *arg)
|
|
{
|
|
struct hci_conn *c;
|
|
struct hci_conn_list_req req, *cl;
|
|
struct hci_conn_info *ci;
|
|
struct hci_dev *hdev;
|
|
int n = 0, size, err;
|
|
|
|
if (copy_from_user(&req, arg, sizeof(req)))
|
|
return -EFAULT;
|
|
|
|
if (!req.conn_num || req.conn_num > (PAGE_SIZE * 2) / sizeof(*ci))
|
|
return -EINVAL;
|
|
|
|
size = sizeof(req) + req.conn_num * sizeof(*ci);
|
|
|
|
cl = kmalloc(size, GFP_KERNEL);
|
|
if (!cl)
|
|
return -ENOMEM;
|
|
|
|
hdev = hci_dev_get(req.dev_id);
|
|
if (!hdev) {
|
|
kfree(cl);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ci = cl->conn_info;
|
|
|
|
hci_dev_lock(hdev);
|
|
list_for_each_entry(c, &hdev->conn_hash.list, 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;
|
|
if (++n >= req.conn_num)
|
|
break;
|
|
}
|
|
hci_dev_unlock(hdev);
|
|
|
|
cl->dev_id = hdev->id;
|
|
cl->conn_num = n;
|
|
size = sizeof(req) + n * sizeof(*ci);
|
|
|
|
hci_dev_put(hdev);
|
|
|
|
err = copy_to_user(arg, cl, size);
|
|
kfree(cl);
|
|
|
|
return err ? -EFAULT : 0;
|
|
}
|
|
|
|
int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
|
|
{
|
|
struct hci_conn_info_req req;
|
|
struct hci_conn_info ci;
|
|
struct hci_conn *conn;
|
|
char __user *ptr = arg + sizeof(req);
|
|
|
|
if (copy_from_user(&req, arg, sizeof(req)))
|
|
return -EFAULT;
|
|
|
|
hci_dev_lock(hdev);
|
|
conn = hci_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(hdev);
|
|
|
|
if (!conn)
|
|
return -ENOENT;
|
|
|
|
return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
|
|
}
|
|
|
|
int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
|
|
{
|
|
struct hci_auth_info_req req;
|
|
struct hci_conn *conn;
|
|
|
|
if (copy_from_user(&req, arg, sizeof(req)))
|
|
return -EFAULT;
|
|
|
|
hci_dev_lock(hdev);
|
|
conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
|
|
if (conn)
|
|
req.type = conn->auth_type;
|
|
hci_dev_unlock(hdev);
|
|
|
|
if (!conn)
|
|
return -ENOENT;
|
|
|
|
return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
|
|
}
|
|
|
|
struct hci_chan *hci_chan_create(struct hci_conn *conn)
|
|
{
|
|
struct hci_dev *hdev = conn->hdev;
|
|
struct hci_chan *chan;
|
|
|
|
BT_DBG("%s hcon %p", hdev->name, conn);
|
|
|
|
chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL);
|
|
if (!chan)
|
|
return NULL;
|
|
|
|
chan->conn = conn;
|
|
skb_queue_head_init(&chan->data_q);
|
|
chan->state = BT_CONNECTED;
|
|
|
|
list_add_rcu(&chan->list, &conn->chan_list);
|
|
|
|
return chan;
|
|
}
|
|
|
|
void hci_chan_del(struct hci_chan *chan)
|
|
{
|
|
struct hci_conn *conn = chan->conn;
|
|
struct hci_dev *hdev = conn->hdev;
|
|
|
|
BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
|
|
|
|
list_del_rcu(&chan->list);
|
|
|
|
synchronize_rcu();
|
|
|
|
hci_conn_put(conn);
|
|
|
|
skb_queue_purge(&chan->data_q);
|
|
kfree(chan);
|
|
}
|
|
|
|
void hci_chan_list_flush(struct hci_conn *conn)
|
|
{
|
|
struct hci_chan *chan, *n;
|
|
|
|
BT_DBG("hcon %p", conn);
|
|
|
|
list_for_each_entry_safe(chan, n, &conn->chan_list, list)
|
|
hci_chan_del(chan);
|
|
}
|
|
|
|
static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
|
|
__u16 handle)
|
|
{
|
|
struct hci_chan *hchan;
|
|
|
|
list_for_each_entry(hchan, &hcon->chan_list, list) {
|
|
if (hchan->handle == handle)
|
|
return hchan;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
|
|
{
|
|
struct hci_conn_hash *h = &hdev->conn_hash;
|
|
struct hci_conn *hcon;
|
|
struct hci_chan *hchan = NULL;
|
|
|
|
rcu_read_lock();
|
|
|
|
list_for_each_entry_rcu(hcon, &h->list, list) {
|
|
hchan = __hci_chan_lookup_handle(hcon, handle);
|
|
if (hchan)
|
|
break;
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
return hchan;
|
|
}
|