diff options
Diffstat (limited to 'net/bluetooth_mgmt/hci_conn.c')
| -rw-r--r-- | net/bluetooth_mgmt/hci_conn.c | 1107 |
1 files changed, 1107 insertions, 0 deletions
diff --git a/net/bluetooth_mgmt/hci_conn.c b/net/bluetooth_mgmt/hci_conn.c new file mode 100644 index 0000000..44ca233 --- /dev/null +++ b/net/bluetooth_mgmt/hci_conn.c @@ -0,0 +1,1107 @@ +/* + BlueZ - Bluetooth protocol stack for Linux + Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved. + + 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. +*/ + +/* Bluetooth HCI connection handling. */ + +#include <linux/module.h> + +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/kernel.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 <linux/uaccess.h> +#include <asm/unaligned.h> + +#include <net/bluetooth/bluetooth.h> +#include <net/bluetooth/hci_core.h> + +static void hci_le_connect(struct hci_conn *conn) +{ + struct hci_dev *hdev = conn->hdev; + struct hci_cp_le_create_conn cp; + + BT_DBG(""); + + conn->state = BT_CONNECT; + conn->out = 1; + conn->link_mode |= HCI_LM_MASTER; + conn->sec_level = BT_SECURITY_LOW; + + memset(&cp, 0, sizeof(cp)); +/* + cp.scan_interval = cpu_to_le16(0x0004); + cp.scan_window = cpu_to_le16(0x0004); + bacpy(&cp.peer_addr, &conn->dst); + cp.peer_addr_type = conn->dst_type; + cp.conn_interval_min = cpu_to_le16(0x0008); // 9.28 ms + cp.conn_interval_max = cpu_to_le16(0x0100); // 320 ms + cp.supervision_timeout = cpu_to_le16(0x0064); + cp.min_ce_len = cpu_to_le16(0x0001); + cp.max_ce_len = cpu_to_le16(0x0001); +*/ + +/* SSBT :: KJH + comment for connection parameters, TODO */ + +/* Bluetooth: use recommended LE connection parameters */ +/* The new connection parameters now match the recommended values for +* Proximity and Health Thermometer profiles. The previous values were +* ramdomly chosen, and are either too low or too high for most cases. +* New values: +* Scan Interval: 60 ms +* Scan Window: 30 ms +* Minimum Connection Interval: 50 ms +* Maximum Connection Interval: 70 ms +* Supervision Timeout: 420 ms +*/ +/* See "Table 5.2: Recommended Scan Interval and Scan Window Values" and +* "Table 5.3: Recommended Connection Interval Values" for both profiles +* for details. Note that the "fast connection" parameters were chosen, +* because we do not support yet dynamically changing these parameters from +* initiator side. +* Additionally, the Proximity profile recommends (section "4.4 Alert on +* Link Loss"): +* "It is recommended that the Link Supervision Timeout (LSTO) is set to 6x +* the connection interval." +* Minimum_CE_Length and Maximum_CE_Length were also changed from 0x0001 to +* 0x0000 because they are informational and optional, and old value was +* not reflecting reality. +*/ + cp.scan_interval = cpu_to_le16(0x0060); /* 60ms (N*0.625ms) */ + cp.scan_window = cpu_to_le16(0x0030); /* 30ms (N*0.625ms) */ + bacpy(&cp.peer_addr, &conn->dst); + cp.peer_addr_type = conn->dst_type; + cp.conn_interval_min = cpu_to_le16(0x0028); /* 50ms (N*1.25ms) */ + cp.conn_interval_max = cpu_to_le16(0x0038); /* 70ms (N*1.25ms) */ + cp.supervision_timeout = cpu_to_le16(0x002a); /* 420ms (N*10ms) */ + cp.min_ce_len = cpu_to_le16(0x0000); + cp.max_ce_len = cpu_to_le16(0x0000); + + hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp); +} + +static void hci_le_connect_cancel(struct hci_conn *conn) +{ + BT_DBG(""); + hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL); +} + +void hci_acl_connect(struct hci_conn *conn) +{ + struct hci_dev *hdev = conn->hdev; + struct inquiry_entry *ie; + struct hci_cp_create_conn cp; + + BT_DBG("%p", conn); + + conn->state = BT_CONNECT; + conn->out = 1; + + conn->link_mode = HCI_LM_MASTER; + + conn->attempt++; + + conn->link_policy = hdev->link_policy; + + memset(&cp, 0, sizeof(cp)); + bacpy(&cp.bdaddr, &conn->dst); + cp.pscan_rep_mode = 0x02; + + ie = hci_inquiry_cache_lookup(hdev, &conn->dst); + if (ie) { + if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) { + cp.pscan_rep_mode = ie->data.pscan_rep_mode; + cp.pscan_mode = ie->data.pscan_mode; + cp.clock_offset = ie->data.clock_offset | + cpu_to_le16(0x8000); + } + + memcpy(conn->dev_class, ie->data.dev_class, 3); + conn->ssp_mode = ie->data.ssp_mode; + } + + cp.pkt_type = cpu_to_le16(conn->pkt_type); + if (lmp_rswitch_capable(hdev) && !(hdev->link_mode & HCI_LM_MASTER)) + cp.role_switch = 0x01; + else + cp.role_switch = 0x00; + + hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp); +} + +static void hci_acl_connect_cancel(struct hci_conn *conn) +{ + struct hci_cp_create_conn_cancel cp; + + BT_DBG("%p", conn); + + if (conn->hdev->hci_ver < 2) + return; + + bacpy(&cp.bdaddr, &conn->dst); + hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp); +} + +void hci_acl_disconn(struct hci_conn *conn, __u8 reason) +{ + struct hci_cp_disconnect cp; + + BT_DBG("%p", conn); + + conn->state = BT_DISCONN; + + cp.handle = cpu_to_le16(conn->handle); + cp.reason = reason; + hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp); +} + +void hci_add_sco(struct hci_conn *conn, __u16 handle) +{ + struct hci_dev *hdev = conn->hdev; + struct hci_cp_add_sco cp; + + BT_DBG("%p", conn); + + conn->state = BT_CONNECT; + conn->out = 1; + + conn->attempt++; + + cp.handle = cpu_to_le16(handle); + cp.pkt_type = cpu_to_le16(conn->pkt_type); + + hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp); +} + +void hci_setup_sync(struct hci_conn *conn, __u16 handle) +{ + struct hci_dev *hdev = conn->hdev; + struct hci_cp_setup_sync_conn cp; + + BT_DBG("%p", conn); + + conn->state = BT_CONNECT; + conn->out = 1; + + conn->attempt++; + + cp.handle = cpu_to_le16(handle); + /* wbs */ + cp.tx_bandwidth = cpu_to_le32(0x00001f40); + cp.rx_bandwidth = cpu_to_le32(0x00001f40); + + if (conn->hdev->is_wbs) { + /* Transparent Data */ + uint16_t voice_setting = hdev->voice_setting | ACF_TRANS; + cp.max_latency = cpu_to_le16(0x000A); + cp.pkt_type = cpu_to_le16(ESCO_WBS); + cp.voice_setting = cpu_to_le16(voice_setting); + /* Retransmission Effort */ + cp.retrans_effort = RE_LINK_QUALITY; + } else { + cp.max_latency = cpu_to_le16(0xffff); + cp.pkt_type = cpu_to_le16(conn->pkt_type); + cp.voice_setting = cpu_to_le16(hdev->voice_setting); + cp.retrans_effort = 0xff; + } + hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp); +} + +void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, + u16 latency, u16 to_multiplier) +{ + struct hci_cp_le_conn_update cp; + struct hci_dev *hdev = conn->hdev; + + memset(&cp, 0, sizeof(cp)); + + cp.handle = cpu_to_le16(conn->handle); + cp.conn_interval_min = cpu_to_le16(min); + cp.conn_interval_max = cpu_to_le16(max); + cp.conn_latency = cpu_to_le16(latency); + cp.supervision_timeout = cpu_to_le16(to_multiplier); + cp.min_ce_len = cpu_to_le16(0x0001); + cp.max_ce_len = cpu_to_le16(0x0001); + + hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp); +} +EXPORT_SYMBOL(hci_le_conn_update); + +void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8], + __u8 ltk[16]) +{ + struct hci_dev *hdev = conn->hdev; + struct hci_cp_le_start_enc cp; + + BT_DBG("%p", conn); + + memset(&cp, 0, sizeof(cp)); + + cp.handle = cpu_to_le16(conn->handle); + memcpy(cp.ltk, ltk, sizeof(cp.ltk)); + cp.ediv = ediv; + memcpy(cp.rand, rand, sizeof(cp.rand)); + + hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp); +} +EXPORT_SYMBOL(hci_le_start_enc); + +void hci_le_ltk_reply(struct hci_conn *conn, u8 ltk[16]) +{ + struct hci_dev *hdev = conn->hdev; + struct hci_cp_le_ltk_reply cp; + + BT_DBG("%p", conn); + + memset(&cp, 0, sizeof(cp)); + + cp.handle = cpu_to_le16(conn->handle); +/* SSBT :: KJH size */ + memcpy(cp.ltk, ltk, sizeof(cp.ltk)); + + hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp); +} +EXPORT_SYMBOL(hci_le_ltk_reply); + +void hci_le_ltk_neg_reply(struct hci_conn *conn) +{ + struct hci_dev *hdev = conn->hdev; + struct hci_cp_le_ltk_neg_reply cp; + + BT_DBG("%p", conn); + + memset(&cp, 0, sizeof(cp)); + + cp.handle = cpu_to_le16(conn->handle); + + hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(cp), &cp); +} + +/* Device _must_ be locked */ +void hci_sco_setup(struct hci_conn *conn, __u8 status) +{ + struct hci_conn *sco = conn->link; + + BT_DBG("%p", conn); + + if (!sco) + return; + + if (!status) { + if (lmp_esco_capable(conn->hdev)) + hci_setup_sync(sco, conn->handle); + else + hci_add_sco(sco, conn->handle); + } else { + hci_proto_connect_cfm(sco, status); + hci_conn_del(sco); + } +} + +static void hci_conn_timeout(unsigned long arg) +{ + struct hci_conn *conn = (void *) arg; + struct hci_dev *hdev = conn->hdev; + __u8 reason; + + BT_DBG("conn %p state %d", conn, conn->state); + + if (atomic_read(&conn->refcnt)) + return; + + hci_dev_lock(hdev); + + switch (conn->state) { + case BT_CONNECT: + case BT_CONNECT2: + if (conn->out) { + if (conn->type == ACL_LINK) + hci_acl_connect_cancel(conn); + else if (conn->type == LE_LINK) + hci_le_connect_cancel(conn); + } + break; + case BT_CONFIG: + case BT_CONNECTED: + reason = hci_proto_disconn_ind(conn); + hci_acl_disconn(conn, reason); + break; + default: + conn->state = BT_CLOSED; + break; + } + + hci_dev_unlock(hdev); +} + +static void hci_conn_idle(unsigned long arg) +{ + struct hci_conn *conn = (void *) arg; + + BT_DBG("conn %p mode %d", conn, conn->mode); + + hci_conn_enter_sniff_mode(conn); +} + +static void hci_conn_auto_accept(unsigned long arg) +{ + struct hci_conn *conn = (void *) arg; + struct hci_dev *hdev = conn->hdev; + + hci_dev_lock(hdev); + + hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst), + &conn->dst); + + hci_dev_unlock(hdev); +} + +static void hci_conn_encrypt_set(unsigned long arg) +{ + struct hci_conn *conn = (void *) arg; + struct hci_dev *hdev = conn->hdev; + struct hci_cp_set_conn_encrypt cp; + + cp.handle = cpu_to_le16(conn->handle); + cp.encrypt = 0x01; + hci_dev_lock(hdev); + + hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), + &cp); + + hci_dev_unlock(hdev); +} + +struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, + __u16 pkt_type, bdaddr_t *dst) +{ + struct hci_conn *conn; + + BT_DBG("%s dst %s", hdev->name, batostr(dst)); + + conn = kzalloc(sizeof(struct hci_conn), GFP_ATOMIC); + if (!conn) + return NULL; + + bacpy(&conn->dst, dst); + conn->hdev = hdev; + conn->type = type; + conn->mode = HCI_CM_ACTIVE; + conn->state = BT_OPEN; + conn->auth_type = HCI_AT_GENERAL_BONDING; + conn->io_capability = hdev->io_capability; + conn->remote_auth = 0xff; + conn->key_type = 0xff; + + conn->power_save = 1; + conn->disc_timeout = HCI_DISCONN_TIMEOUT; + + switch (type) { + case ACL_LINK: + conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK; + break; + case SCO_LINK: + if (!pkt_type) + pkt_type = SCO_ESCO_MASK; + case ESCO_LINK: + if (!pkt_type) + pkt_type = ALL_ESCO_MASK; + if (lmp_esco_capable(hdev)) { + /* HCI Setup Synchronous Connection Command uses + reverse logic on the EDR_ESCO_MASK bits */ + conn->pkt_type = (pkt_type ^ EDR_ESCO_MASK) & + hdev->esco_type; + } else { + /* Legacy HCI Add Sco Connection Command uses a + shifted bitmask */ + conn->pkt_type = (pkt_type << 5) & hdev->pkt_type & + SCO_PTYPE_MASK; + } + break; + } + + skb_queue_head_init(&conn->data_q); + + setup_timer(&conn->disc_timer, hci_conn_timeout, (unsigned long)conn); + setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn); + setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept, + (unsigned long) conn); + setup_timer(&conn->encrypt_timer, hci_conn_encrypt_set, + (unsigned long) conn); + + atomic_set(&conn->refcnt, 0); + + hci_dev_hold(hdev); + + tasklet_disable(&hdev->tx_task); + + hci_conn_hash_add(hdev, conn); + if (hdev->notify) + hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); + + atomic_set(&conn->devref, 0); + + hci_conn_init_sysfs(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); + + del_timer(&conn->idle_timer); + + del_timer(&conn->disc_timer); + + del_timer(&conn->auto_accept_timer); + + del_timer(&conn->encrypt_timer); + + if (conn->type == ACL_LINK) { + struct hci_conn *sco = conn->link; + if (sco) + sco->link = NULL; + + /* Unacked frames */ + hdev->acl_cnt += conn->sent; + } else if (conn->type == LE_LINK) { + if (hdev->le_pkts) + hdev->le_cnt += conn->sent; + else + hdev->acl_cnt += conn->sent; + } else { + struct hci_conn *acl = conn->link; + if (acl) { + acl->link = NULL; + hci_conn_put(acl); + } + } + + tasklet_disable(&hdev->tx_task); + + hci_conn_hash_del(hdev, conn); + if (hdev->notify) + hdev->notify(hdev, HCI_NOTIFY_CONN_DEL); + + tasklet_enable(&hdev->tx_task); + + skb_queue_purge(&conn->data_q); + + hci_conn_put_device(conn); + + hci_dev_put(hdev); + + if (conn->handle == 0) + 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)); + + read_lock_bh(&hci_dev_list_lock); + + list_for_each(p, &hci_dev_list) { + struct hci_dev *d = list_entry(p, struct hci_dev, list); + + if (!test_bit(HCI_UP, &d->flags) || test_bit(HCI_RAW, &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) + hdev = hci_dev_hold(hdev); + + read_unlock_bh(&hci_dev_list_lock); + return hdev; +} +EXPORT_SYMBOL(hci_get_route); + +/* Create SCO, ACL or LE connection. + * Device _must_ be locked */ +struct hci_conn *hci_connect(struct hci_dev *hdev, int type, + __u16 pkt_type, bdaddr_t *dst, + __u8 sec_level, __u8 auth_type) +{ + struct hci_conn *acl; + struct hci_conn *sco; + struct hci_conn *le; + + BT_DBG("%s dst %s", hdev->name, batostr(dst)); + + if (type == LE_LINK) { + struct adv_entry *entry; +/* SSBT :: KJH + * to check le connection & stored key, if there is stored key, use addr_type. */ + struct smp_ltk *ltk; + + le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst); + if (le) { + BT_DBG("There is connected le link"); + hci_conn_hold(le); + return le; + } + + ltk = hci_find_ltk_by_addr(hdev, dst, 100); + + if (ltk) { + BT_DBG("There is stored LTK"); + le = hci_conn_add(hdev, LE_LINK, 0, dst); + if (!le) + return ERR_PTR(-ENOMEM); + le->dst_type = ltk->bdaddr_type; + } else { + entry = hci_find_adv_entry(hdev, dst); + if (!entry) + return ERR_PTR(-EHOSTUNREACH); + le = hci_conn_add(hdev, LE_LINK, 0, dst); + if (!le) + return ERR_PTR(-ENOMEM); + le->dst_type = entry->bdaddr_type; + } + + BT_DBG("----- le->dst_type %x", le->dst_type); + + hci_le_connect(le); + + hci_conn_hold(le); + + return le; + } + + acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); + if (!acl) { + acl = hci_conn_add(hdev, ACL_LINK, 0, dst); + if (!acl) + return NULL; + } + + 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_connect(acl); + } + + if (type == ACL_LINK) + return acl; + + sco = hci_conn_hash_lookup_ba(hdev, type, dst); + if (!sco) { + sco = hci_conn_add(hdev, type, pkt_type, dst); + if (!sco) { + 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)) { + acl->power_save = 1; + 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; +} +EXPORT_SYMBOL(hci_connect); + +/* Check link security requirement */ +int hci_conn_check_link_mode(struct hci_conn *conn) +{ + BT_DBG("conn %p", conn); + + if (conn->ssp_mode > 0 && conn->hdev->ssp_mode > 0 && + !(conn->link_mode & HCI_LM_ENCRYPT)) + return 0; + + return 1; +} +EXPORT_SYMBOL(hci_conn_check_link_mode); + +/* Authenticate remote device */ +static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type) +{ + BT_DBG("conn %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("conn %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("conn %p", conn); + + /* 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 && + (!conn->ssp_mode || !conn->hdev->ssp_mode)) + 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. + High security level requires the combination key, + maximum PIN code length (16) is recommended not mandatory */ + if (conn->key_type == HCI_LK_COMBINATION && + (sec_level > BT_SECURITY_LOW || + 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("conn %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("conn %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; +} +EXPORT_SYMBOL(hci_conn_change_link_key); + +/* Switch role */ +int hci_conn_switch_role(struct hci_conn *conn, __u8 role) +{ + BT_DBG("conn %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); + +/* BEGIN SS_BLUEZ_BT +kjh 2011.06.23 : */ +/* workaround for a2dp chopping in multi connection. */ +/* Change Policy */ +int hci_conn_change_policy(struct hci_conn *conn, __u8 policy) +{ + struct hci_cp_write_link_policy cp; + cp.handle = cpu_to_le16(conn->handle); + cp.policy = policy; + hci_send_cmd(conn->hdev, HCI_OP_WRITE_LINK_POLICY, sizeof(cp), &cp); + + return 0; +} +EXPORT_SYMBOL(hci_conn_change_policy); + +/* Set Encrypt*/ +int hci_conn_set_encrypt(struct hci_conn *conn, __u8 enable) +{ + struct hci_cp_set_conn_encrypt cp; + cp.handle = cpu_to_le16(conn->handle); + cp.encrypt = enable; + hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), &cp); + + return 0; +} +EXPORT_SYMBOL(hci_conn_set_encrypt); +/* END SS_BLUEZ_BT */ + +/* Enter active mode */ +void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active) +{ + struct hci_dev *hdev = conn->hdev; + + BT_DBG("conn %p mode %d", conn, conn->mode); + + if (test_bit(HCI_RAW, &hdev->flags)) + return; + + if (conn->mode != HCI_CM_SNIFF) + goto timer; + + if (!conn->power_save && !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)); +} + +/* Enter sniff mode */ +void hci_conn_enter_sniff_mode(struct hci_conn *conn) +{ + struct hci_dev *hdev = conn->hdev; + + BT_DBG("conn %p mode %d", conn, conn->mode); + + if (test_bit(HCI_RAW, &hdev->flags)) + return; + + if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn)) + return; + + if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF)) + return; + + if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) { + struct hci_cp_sniff_subrate cp; + cp.handle = cpu_to_le16(conn->handle); + cp.max_latency = cpu_to_le16(0); + cp.min_remote_timeout = cpu_to_le16(0); + cp.min_local_timeout = cpu_to_le16(0); + hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp); + } + + if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) { + struct hci_cp_sniff_mode cp; + cp.handle = cpu_to_le16(conn->handle); + cp.max_interval = cpu_to_le16(hdev->sniff_max_interval); + cp.min_interval = cpu_to_le16(hdev->sniff_min_interval); + cp.attempt = cpu_to_le16(4); + cp.timeout = cpu_to_le16(1); + hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp); + } +} + +/* Drop all connection on the device */ +void hci_conn_hash_flush(struct hci_dev *hdev) +{ + struct hci_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_cfm(c, 0x16); + 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_connect(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_list_req req, *cl; + struct hci_conn_info *ci; + struct hci_dev *hdev; + struct list_head *p; + 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_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; + if (c->type == SCO_LINK) { + (ci + n)->mtu = hdev->sco_mtu; + (ci + n)->cnt = hdev->sco_cnt; + (ci + n)->pkts = hdev->sco_pkts; + } else { + (ci + n)->mtu = hdev->acl_mtu; + (ci + n)->cnt = hdev->acl_cnt; + (ci + n)->pkts = hdev->acl_pkts; + } + if (++n >= req.conn_num) + break; + } + hci_dev_unlock_bh(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_bh(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; + if (req.type == SCO_LINK) { + ci.mtu = hdev->sco_mtu; + ci.cnt = hdev->sco_cnt; + ci.pkts = hdev->sco_pkts; + } else { + ci.mtu = hdev->acl_mtu; + ci.cnt = hdev->acl_cnt; + ci.pkts = hdev->acl_pkts; + } + } + hci_dev_unlock_bh(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_bh(hdev); + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr); + if (conn) + req.type = conn->auth_type; + hci_dev_unlock_bh(hdev); + + if (!conn) + return -ENOENT; + + return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0; +} |