From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- net/bluetooth/hci_conn.c | 471 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 471 insertions(+) create mode 100644 net/bluetooth/hci_conn.c (limited to 'net/bluetooth/hci_conn.c') diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c new file mode 100644 index 00000000000..71762d7e997 --- /dev/null +++ b/net/bluetooth/hci_conn.c @@ -0,0 +1,471 @@ +/* + BlueZ - Bluetooth protocol stack for Linux + Copyright (C) 2000-2001 Qualcomm Incorporated + + Written 2000,2001 by Maxim Krasnyansky + + 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 +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include +#include + +#ifndef CONFIG_BT_HCI_CORE_DEBUG +#undef BT_DBG +#define BT_DBG(D...) +#endif + +static 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; + + memset(&cp, 0, sizeof(cp)); + bacpy(&cp.bdaddr, &conn->dst); + cp.pscan_rep_mode = 0x02; + + if ((ie = hci_inquiry_cache_lookup(hdev, &conn->dst)) && + 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); + } + + 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, 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, OGF_LINK_CTL, OCF_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; + + 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, sizeof(cp), &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); + + hci_conn_hash_add(hdev, conn); + if (hdev->notify) + hdev->notify(hdev, HCI_NOTIFY_CONN_ADD); + + 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); + + 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_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)); + + 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 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 = hci_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 = hci_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; + } +} +EXPORT_SYMBOL(hci_connect); + +/* 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)) { + struct hci_cp_auth_requested cp; + cp.handle = __cpu_to_le16(conn->handle); + hci_send_cmd(conn->hdev, OGF_LINK_CTL, OCF_AUTH_REQUESTED, sizeof(cp), &cp); + } + return 0; +} +EXPORT_SYMBOL(hci_conn_auth); + +/* 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)) { + struct hci_cp_set_conn_encrypt cp; + cp.handle = __cpu_to_le16(conn->handle); + cp.encrypt = 1; + hci_send_cmd(conn->hdev, OGF_LINK_CTL, OCF_SET_CONN_ENCRYPT, sizeof(cp), &cp); + } + return 0; +} +EXPORT_SYMBOL(hci_conn_encrypt); + +/* 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->pend)) { + struct hci_cp_change_conn_link_key cp; + cp.handle = __cpu_to_le16(conn->handle); + hci_send_cmd(conn->hdev, OGF_LINK_CTL, OCF_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, uint8_t 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->pend)) { + struct hci_cp_switch_role cp; + bacpy(&cp.bdaddr, &conn->dst); + cp.role = role; + hci_send_cmd(conn->hdev, OGF_LINK_POLICY, OCF_SWITCH_ROLE, sizeof(cp), &cp); + } + return 0; +} +EXPORT_SYMBOL(hci_conn_switch_role); + +/* 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_ind(c, 0x16); + hci_conn_del(c); + } +} + +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); + + if (!(cl = (void *) kmalloc(size, GFP_KERNEL))) + return -ENOMEM; + + if (!(hdev = hci_dev_get(req.dev_id))) { + 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 (++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; + } + hci_dev_unlock_bh(hdev); + + if (!conn) + return -ENOENT; + + return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0; +} -- cgit v1.2.3