mirror of https://gitee.com/openkylin/linux.git
2063 lines
44 KiB
C
2063 lines
44 KiB
C
/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (C) 2000-2001 Qualcomm Incorporated
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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 sockets. */
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#include <linux/export.h>
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#include <linux/utsname.h>
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#include <linux/sched.h>
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#include <asm/unaligned.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/hci_mon.h>
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#include <net/bluetooth/mgmt.h>
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#include "mgmt_util.h"
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static LIST_HEAD(mgmt_chan_list);
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static DEFINE_MUTEX(mgmt_chan_list_lock);
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static DEFINE_IDA(sock_cookie_ida);
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static atomic_t monitor_promisc = ATOMIC_INIT(0);
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/* ----- HCI socket interface ----- */
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/* Socket info */
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#define hci_pi(sk) ((struct hci_pinfo *) sk)
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struct hci_pinfo {
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struct bt_sock bt;
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struct hci_dev *hdev;
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struct hci_filter filter;
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__u32 cmsg_mask;
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unsigned short channel;
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unsigned long flags;
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__u32 cookie;
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char comm[TASK_COMM_LEN];
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};
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void hci_sock_set_flag(struct sock *sk, int nr)
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{
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set_bit(nr, &hci_pi(sk)->flags);
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}
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void hci_sock_clear_flag(struct sock *sk, int nr)
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{
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clear_bit(nr, &hci_pi(sk)->flags);
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}
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int hci_sock_test_flag(struct sock *sk, int nr)
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{
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return test_bit(nr, &hci_pi(sk)->flags);
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}
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unsigned short hci_sock_get_channel(struct sock *sk)
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{
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return hci_pi(sk)->channel;
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}
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u32 hci_sock_get_cookie(struct sock *sk)
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{
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return hci_pi(sk)->cookie;
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}
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static bool hci_sock_gen_cookie(struct sock *sk)
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{
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int id = hci_pi(sk)->cookie;
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if (!id) {
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id = ida_simple_get(&sock_cookie_ida, 1, 0, GFP_KERNEL);
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if (id < 0)
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id = 0xffffffff;
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hci_pi(sk)->cookie = id;
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get_task_comm(hci_pi(sk)->comm, current);
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return true;
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}
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return false;
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}
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static void hci_sock_free_cookie(struct sock *sk)
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{
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int id = hci_pi(sk)->cookie;
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if (id) {
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hci_pi(sk)->cookie = 0xffffffff;
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ida_simple_remove(&sock_cookie_ida, id);
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}
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}
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static inline int hci_test_bit(int nr, const void *addr)
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{
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return *((const __u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
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}
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/* Security filter */
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#define HCI_SFLT_MAX_OGF 5
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struct hci_sec_filter {
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__u32 type_mask;
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__u32 event_mask[2];
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__u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4];
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};
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static const struct hci_sec_filter hci_sec_filter = {
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/* Packet types */
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0x10,
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/* Events */
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{ 0x1000d9fe, 0x0000b00c },
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/* Commands */
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{
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{ 0x0 },
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/* OGF_LINK_CTL */
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{ 0xbe000006, 0x00000001, 0x00000000, 0x00 },
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/* OGF_LINK_POLICY */
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{ 0x00005200, 0x00000000, 0x00000000, 0x00 },
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/* OGF_HOST_CTL */
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{ 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 },
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/* OGF_INFO_PARAM */
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{ 0x000002be, 0x00000000, 0x00000000, 0x00 },
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/* OGF_STATUS_PARAM */
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{ 0x000000ea, 0x00000000, 0x00000000, 0x00 }
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}
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};
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static struct bt_sock_list hci_sk_list = {
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.lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock)
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};
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static bool is_filtered_packet(struct sock *sk, struct sk_buff *skb)
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{
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struct hci_filter *flt;
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int flt_type, flt_event;
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/* Apply filter */
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flt = &hci_pi(sk)->filter;
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flt_type = hci_skb_pkt_type(skb) & HCI_FLT_TYPE_BITS;
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if (!test_bit(flt_type, &flt->type_mask))
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return true;
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/* Extra filter for event packets only */
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if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT)
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return false;
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flt_event = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS);
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if (!hci_test_bit(flt_event, &flt->event_mask))
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return true;
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/* Check filter only when opcode is set */
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if (!flt->opcode)
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return false;
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if (flt_event == HCI_EV_CMD_COMPLETE &&
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flt->opcode != get_unaligned((__le16 *)(skb->data + 3)))
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return true;
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if (flt_event == HCI_EV_CMD_STATUS &&
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flt->opcode != get_unaligned((__le16 *)(skb->data + 4)))
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return true;
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return false;
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}
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/* Send frame to RAW socket */
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void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
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{
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struct sock *sk;
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struct sk_buff *skb_copy = NULL;
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BT_DBG("hdev %p len %d", hdev, skb->len);
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read_lock(&hci_sk_list.lock);
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sk_for_each(sk, &hci_sk_list.head) {
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struct sk_buff *nskb;
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if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev)
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continue;
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/* Don't send frame to the socket it came from */
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if (skb->sk == sk)
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continue;
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if (hci_pi(sk)->channel == HCI_CHANNEL_RAW) {
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if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
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hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
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hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
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hci_skb_pkt_type(skb) != HCI_SCODATA_PKT)
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continue;
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if (is_filtered_packet(sk, skb))
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continue;
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} else if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
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if (!bt_cb(skb)->incoming)
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continue;
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if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
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hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
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hci_skb_pkt_type(skb) != HCI_SCODATA_PKT)
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continue;
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} else {
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/* Don't send frame to other channel types */
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continue;
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}
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if (!skb_copy) {
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/* Create a private copy with headroom */
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skb_copy = __pskb_copy_fclone(skb, 1, GFP_ATOMIC, true);
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if (!skb_copy)
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continue;
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/* Put type byte before the data */
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memcpy(skb_push(skb_copy, 1), &hci_skb_pkt_type(skb), 1);
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}
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nskb = skb_clone(skb_copy, GFP_ATOMIC);
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if (!nskb)
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continue;
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if (sock_queue_rcv_skb(sk, nskb))
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kfree_skb(nskb);
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}
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read_unlock(&hci_sk_list.lock);
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kfree_skb(skb_copy);
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}
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/* Send frame to sockets with specific channel */
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void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
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int flag, struct sock *skip_sk)
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{
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struct sock *sk;
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BT_DBG("channel %u len %d", channel, skb->len);
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read_lock(&hci_sk_list.lock);
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sk_for_each(sk, &hci_sk_list.head) {
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struct sk_buff *nskb;
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/* Ignore socket without the flag set */
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if (!hci_sock_test_flag(sk, flag))
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continue;
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/* Skip the original socket */
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if (sk == skip_sk)
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continue;
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if (sk->sk_state != BT_BOUND)
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continue;
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if (hci_pi(sk)->channel != channel)
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continue;
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nskb = skb_clone(skb, GFP_ATOMIC);
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if (!nskb)
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continue;
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if (sock_queue_rcv_skb(sk, nskb))
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kfree_skb(nskb);
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}
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read_unlock(&hci_sk_list.lock);
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}
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/* Send frame to monitor socket */
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void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
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{
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struct sk_buff *skb_copy = NULL;
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struct hci_mon_hdr *hdr;
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__le16 opcode;
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if (!atomic_read(&monitor_promisc))
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return;
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BT_DBG("hdev %p len %d", hdev, skb->len);
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switch (hci_skb_pkt_type(skb)) {
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case HCI_COMMAND_PKT:
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opcode = cpu_to_le16(HCI_MON_COMMAND_PKT);
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break;
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case HCI_EVENT_PKT:
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opcode = cpu_to_le16(HCI_MON_EVENT_PKT);
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break;
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case HCI_ACLDATA_PKT:
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if (bt_cb(skb)->incoming)
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opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT);
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else
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opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT);
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break;
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case HCI_SCODATA_PKT:
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if (bt_cb(skb)->incoming)
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opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT);
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else
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opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT);
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break;
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case HCI_DIAG_PKT:
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opcode = cpu_to_le16(HCI_MON_VENDOR_DIAG);
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break;
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default:
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return;
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}
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/* Create a private copy with headroom */
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skb_copy = __pskb_copy_fclone(skb, HCI_MON_HDR_SIZE, GFP_ATOMIC, true);
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if (!skb_copy)
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return;
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/* Put header before the data */
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hdr = skb_push(skb_copy, HCI_MON_HDR_SIZE);
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hdr->opcode = opcode;
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hdr->index = cpu_to_le16(hdev->id);
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hdr->len = cpu_to_le16(skb->len);
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hci_send_to_channel(HCI_CHANNEL_MONITOR, skb_copy,
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HCI_SOCK_TRUSTED, NULL);
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kfree_skb(skb_copy);
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}
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void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
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void *data, u16 data_len, ktime_t tstamp,
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int flag, struct sock *skip_sk)
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{
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struct sock *sk;
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__le16 index;
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if (hdev)
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index = cpu_to_le16(hdev->id);
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else
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index = cpu_to_le16(MGMT_INDEX_NONE);
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read_lock(&hci_sk_list.lock);
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sk_for_each(sk, &hci_sk_list.head) {
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struct hci_mon_hdr *hdr;
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struct sk_buff *skb;
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if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL)
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continue;
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/* Ignore socket without the flag set */
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if (!hci_sock_test_flag(sk, flag))
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continue;
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/* Skip the original socket */
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if (sk == skip_sk)
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continue;
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skb = bt_skb_alloc(6 + data_len, GFP_ATOMIC);
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if (!skb)
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continue;
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put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
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put_unaligned_le16(event, skb_put(skb, 2));
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if (data)
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skb_put_data(skb, data, data_len);
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skb->tstamp = tstamp;
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hdr = skb_push(skb, HCI_MON_HDR_SIZE);
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hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT);
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hdr->index = index;
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hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
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hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
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HCI_SOCK_TRUSTED, NULL);
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kfree_skb(skb);
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}
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read_unlock(&hci_sk_list.lock);
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}
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static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
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{
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struct hci_mon_hdr *hdr;
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struct hci_mon_new_index *ni;
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struct hci_mon_index_info *ii;
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struct sk_buff *skb;
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__le16 opcode;
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switch (event) {
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case HCI_DEV_REG:
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skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC);
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if (!skb)
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return NULL;
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ni = skb_put(skb, HCI_MON_NEW_INDEX_SIZE);
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ni->type = hdev->dev_type;
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ni->bus = hdev->bus;
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bacpy(&ni->bdaddr, &hdev->bdaddr);
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memcpy(ni->name, hdev->name, 8);
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opcode = cpu_to_le16(HCI_MON_NEW_INDEX);
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break;
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case HCI_DEV_UNREG:
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skb = bt_skb_alloc(0, GFP_ATOMIC);
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if (!skb)
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return NULL;
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opcode = cpu_to_le16(HCI_MON_DEL_INDEX);
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break;
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case HCI_DEV_SETUP:
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if (hdev->manufacturer == 0xffff)
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return NULL;
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/* fall through */
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case HCI_DEV_UP:
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skb = bt_skb_alloc(HCI_MON_INDEX_INFO_SIZE, GFP_ATOMIC);
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if (!skb)
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return NULL;
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ii = skb_put(skb, HCI_MON_INDEX_INFO_SIZE);
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bacpy(&ii->bdaddr, &hdev->bdaddr);
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ii->manufacturer = cpu_to_le16(hdev->manufacturer);
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opcode = cpu_to_le16(HCI_MON_INDEX_INFO);
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break;
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case HCI_DEV_OPEN:
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skb = bt_skb_alloc(0, GFP_ATOMIC);
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if (!skb)
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return NULL;
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opcode = cpu_to_le16(HCI_MON_OPEN_INDEX);
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break;
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case HCI_DEV_CLOSE:
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skb = bt_skb_alloc(0, GFP_ATOMIC);
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if (!skb)
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return NULL;
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opcode = cpu_to_le16(HCI_MON_CLOSE_INDEX);
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break;
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default:
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return NULL;
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}
|
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|
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__net_timestamp(skb);
|
|
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hdr = skb_push(skb, HCI_MON_HDR_SIZE);
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hdr->opcode = opcode;
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hdr->index = cpu_to_le16(hdev->id);
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hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
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return skb;
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}
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|
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static struct sk_buff *create_monitor_ctrl_open(struct sock *sk)
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{
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struct hci_mon_hdr *hdr;
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struct sk_buff *skb;
|
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u16 format;
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u8 ver[3];
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u32 flags;
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/* No message needed when cookie is not present */
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if (!hci_pi(sk)->cookie)
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return NULL;
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|
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switch (hci_pi(sk)->channel) {
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case HCI_CHANNEL_RAW:
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format = 0x0000;
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ver[0] = BT_SUBSYS_VERSION;
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put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
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break;
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case HCI_CHANNEL_USER:
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format = 0x0001;
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ver[0] = BT_SUBSYS_VERSION;
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put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
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break;
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case HCI_CHANNEL_CONTROL:
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format = 0x0002;
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mgmt_fill_version_info(ver);
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break;
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default:
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/* No message for unsupported format */
|
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return NULL;
|
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}
|
|
|
|
skb = bt_skb_alloc(14 + TASK_COMM_LEN , GFP_ATOMIC);
|
|
if (!skb)
|
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return NULL;
|
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|
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flags = hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) ? 0x1 : 0x0;
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|
|
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put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
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put_unaligned_le16(format, skb_put(skb, 2));
|
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skb_put_data(skb, ver, sizeof(ver));
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put_unaligned_le32(flags, skb_put(skb, 4));
|
|
skb_put_u8(skb, TASK_COMM_LEN);
|
|
skb_put_data(skb, hci_pi(sk)->comm, TASK_COMM_LEN);
|
|
|
|
__net_timestamp(skb);
|
|
|
|
hdr = skb_push(skb, HCI_MON_HDR_SIZE);
|
|
hdr->opcode = cpu_to_le16(HCI_MON_CTRL_OPEN);
|
|
if (hci_pi(sk)->hdev)
|
|
hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
|
|
else
|
|
hdr->index = cpu_to_le16(HCI_DEV_NONE);
|
|
hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
|
|
|
|
return skb;
|
|
}
|
|
|
|
static struct sk_buff *create_monitor_ctrl_close(struct sock *sk)
|
|
{
|
|
struct hci_mon_hdr *hdr;
|
|
struct sk_buff *skb;
|
|
|
|
/* No message needed when cookie is not present */
|
|
if (!hci_pi(sk)->cookie)
|
|
return NULL;
|
|
|
|
switch (hci_pi(sk)->channel) {
|
|
case HCI_CHANNEL_RAW:
|
|
case HCI_CHANNEL_USER:
|
|
case HCI_CHANNEL_CONTROL:
|
|
break;
|
|
default:
|
|
/* No message for unsupported format */
|
|
return NULL;
|
|
}
|
|
|
|
skb = bt_skb_alloc(4, GFP_ATOMIC);
|
|
if (!skb)
|
|
return NULL;
|
|
|
|
put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
|
|
|
|
__net_timestamp(skb);
|
|
|
|
hdr = skb_push(skb, HCI_MON_HDR_SIZE);
|
|
hdr->opcode = cpu_to_le16(HCI_MON_CTRL_CLOSE);
|
|
if (hci_pi(sk)->hdev)
|
|
hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
|
|
else
|
|
hdr->index = cpu_to_le16(HCI_DEV_NONE);
|
|
hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
|
|
|
|
return skb;
|
|
}
|
|
|
|
static struct sk_buff *create_monitor_ctrl_command(struct sock *sk, u16 index,
|
|
u16 opcode, u16 len,
|
|
const void *buf)
|
|
{
|
|
struct hci_mon_hdr *hdr;
|
|
struct sk_buff *skb;
|
|
|
|
skb = bt_skb_alloc(6 + len, GFP_ATOMIC);
|
|
if (!skb)
|
|
return NULL;
|
|
|
|
put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
|
|
put_unaligned_le16(opcode, skb_put(skb, 2));
|
|
|
|
if (buf)
|
|
skb_put_data(skb, buf, len);
|
|
|
|
__net_timestamp(skb);
|
|
|
|
hdr = skb_push(skb, HCI_MON_HDR_SIZE);
|
|
hdr->opcode = cpu_to_le16(HCI_MON_CTRL_COMMAND);
|
|
hdr->index = cpu_to_le16(index);
|
|
hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
|
|
|
|
return skb;
|
|
}
|
|
|
|
static void __printf(2, 3)
|
|
send_monitor_note(struct sock *sk, const char *fmt, ...)
|
|
{
|
|
size_t len;
|
|
struct hci_mon_hdr *hdr;
|
|
struct sk_buff *skb;
|
|
va_list args;
|
|
|
|
va_start(args, fmt);
|
|
len = vsnprintf(NULL, 0, fmt, args);
|
|
va_end(args);
|
|
|
|
skb = bt_skb_alloc(len + 1, GFP_ATOMIC);
|
|
if (!skb)
|
|
return;
|
|
|
|
va_start(args, fmt);
|
|
vsprintf(skb_put(skb, len), fmt, args);
|
|
*(u8 *)skb_put(skb, 1) = 0;
|
|
va_end(args);
|
|
|
|
__net_timestamp(skb);
|
|
|
|
hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE);
|
|
hdr->opcode = cpu_to_le16(HCI_MON_SYSTEM_NOTE);
|
|
hdr->index = cpu_to_le16(HCI_DEV_NONE);
|
|
hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
|
|
|
|
if (sock_queue_rcv_skb(sk, skb))
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
static void send_monitor_replay(struct sock *sk)
|
|
{
|
|
struct hci_dev *hdev;
|
|
|
|
read_lock(&hci_dev_list_lock);
|
|
|
|
list_for_each_entry(hdev, &hci_dev_list, list) {
|
|
struct sk_buff *skb;
|
|
|
|
skb = create_monitor_event(hdev, HCI_DEV_REG);
|
|
if (!skb)
|
|
continue;
|
|
|
|
if (sock_queue_rcv_skb(sk, skb))
|
|
kfree_skb(skb);
|
|
|
|
if (!test_bit(HCI_RUNNING, &hdev->flags))
|
|
continue;
|
|
|
|
skb = create_monitor_event(hdev, HCI_DEV_OPEN);
|
|
if (!skb)
|
|
continue;
|
|
|
|
if (sock_queue_rcv_skb(sk, skb))
|
|
kfree_skb(skb);
|
|
|
|
if (test_bit(HCI_UP, &hdev->flags))
|
|
skb = create_monitor_event(hdev, HCI_DEV_UP);
|
|
else if (hci_dev_test_flag(hdev, HCI_SETUP))
|
|
skb = create_monitor_event(hdev, HCI_DEV_SETUP);
|
|
else
|
|
skb = NULL;
|
|
|
|
if (skb) {
|
|
if (sock_queue_rcv_skb(sk, skb))
|
|
kfree_skb(skb);
|
|
}
|
|
}
|
|
|
|
read_unlock(&hci_dev_list_lock);
|
|
}
|
|
|
|
static void send_monitor_control_replay(struct sock *mon_sk)
|
|
{
|
|
struct sock *sk;
|
|
|
|
read_lock(&hci_sk_list.lock);
|
|
|
|
sk_for_each(sk, &hci_sk_list.head) {
|
|
struct sk_buff *skb;
|
|
|
|
skb = create_monitor_ctrl_open(sk);
|
|
if (!skb)
|
|
continue;
|
|
|
|
if (sock_queue_rcv_skb(mon_sk, skb))
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
read_unlock(&hci_sk_list.lock);
|
|
}
|
|
|
|
/* Generate internal stack event */
|
|
static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data)
|
|
{
|
|
struct hci_event_hdr *hdr;
|
|
struct hci_ev_stack_internal *ev;
|
|
struct sk_buff *skb;
|
|
|
|
skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC);
|
|
if (!skb)
|
|
return;
|
|
|
|
hdr = skb_put(skb, HCI_EVENT_HDR_SIZE);
|
|
hdr->evt = HCI_EV_STACK_INTERNAL;
|
|
hdr->plen = sizeof(*ev) + dlen;
|
|
|
|
ev = skb_put(skb, sizeof(*ev) + dlen);
|
|
ev->type = type;
|
|
memcpy(ev->data, data, dlen);
|
|
|
|
bt_cb(skb)->incoming = 1;
|
|
__net_timestamp(skb);
|
|
|
|
hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
|
|
hci_send_to_sock(hdev, skb);
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
void hci_sock_dev_event(struct hci_dev *hdev, int event)
|
|
{
|
|
BT_DBG("hdev %s event %d", hdev->name, event);
|
|
|
|
if (atomic_read(&monitor_promisc)) {
|
|
struct sk_buff *skb;
|
|
|
|
/* Send event to monitor */
|
|
skb = create_monitor_event(hdev, event);
|
|
if (skb) {
|
|
hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
|
|
HCI_SOCK_TRUSTED, NULL);
|
|
kfree_skb(skb);
|
|
}
|
|
}
|
|
|
|
if (event <= HCI_DEV_DOWN) {
|
|
struct hci_ev_si_device ev;
|
|
|
|
/* Send event to sockets */
|
|
ev.event = event;
|
|
ev.dev_id = hdev->id;
|
|
hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev);
|
|
}
|
|
|
|
if (event == HCI_DEV_UNREG) {
|
|
struct sock *sk;
|
|
|
|
/* Detach sockets from device */
|
|
read_lock(&hci_sk_list.lock);
|
|
sk_for_each(sk, &hci_sk_list.head) {
|
|
bh_lock_sock_nested(sk);
|
|
if (hci_pi(sk)->hdev == hdev) {
|
|
hci_pi(sk)->hdev = NULL;
|
|
sk->sk_err = EPIPE;
|
|
sk->sk_state = BT_OPEN;
|
|
sk->sk_state_change(sk);
|
|
|
|
hci_dev_put(hdev);
|
|
}
|
|
bh_unlock_sock(sk);
|
|
}
|
|
read_unlock(&hci_sk_list.lock);
|
|
}
|
|
}
|
|
|
|
static struct hci_mgmt_chan *__hci_mgmt_chan_find(unsigned short channel)
|
|
{
|
|
struct hci_mgmt_chan *c;
|
|
|
|
list_for_each_entry(c, &mgmt_chan_list, list) {
|
|
if (c->channel == channel)
|
|
return c;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct hci_mgmt_chan *hci_mgmt_chan_find(unsigned short channel)
|
|
{
|
|
struct hci_mgmt_chan *c;
|
|
|
|
mutex_lock(&mgmt_chan_list_lock);
|
|
c = __hci_mgmt_chan_find(channel);
|
|
mutex_unlock(&mgmt_chan_list_lock);
|
|
|
|
return c;
|
|
}
|
|
|
|
int hci_mgmt_chan_register(struct hci_mgmt_chan *c)
|
|
{
|
|
if (c->channel < HCI_CHANNEL_CONTROL)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&mgmt_chan_list_lock);
|
|
if (__hci_mgmt_chan_find(c->channel)) {
|
|
mutex_unlock(&mgmt_chan_list_lock);
|
|
return -EALREADY;
|
|
}
|
|
|
|
list_add_tail(&c->list, &mgmt_chan_list);
|
|
|
|
mutex_unlock(&mgmt_chan_list_lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(hci_mgmt_chan_register);
|
|
|
|
void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c)
|
|
{
|
|
mutex_lock(&mgmt_chan_list_lock);
|
|
list_del(&c->list);
|
|
mutex_unlock(&mgmt_chan_list_lock);
|
|
}
|
|
EXPORT_SYMBOL(hci_mgmt_chan_unregister);
|
|
|
|
static int hci_sock_release(struct socket *sock)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct hci_dev *hdev;
|
|
struct sk_buff *skb;
|
|
|
|
BT_DBG("sock %p sk %p", sock, sk);
|
|
|
|
if (!sk)
|
|
return 0;
|
|
|
|
hdev = hci_pi(sk)->hdev;
|
|
|
|
switch (hci_pi(sk)->channel) {
|
|
case HCI_CHANNEL_MONITOR:
|
|
atomic_dec(&monitor_promisc);
|
|
break;
|
|
case HCI_CHANNEL_RAW:
|
|
case HCI_CHANNEL_USER:
|
|
case HCI_CHANNEL_CONTROL:
|
|
/* Send event to monitor */
|
|
skb = create_monitor_ctrl_close(sk);
|
|
if (skb) {
|
|
hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
|
|
HCI_SOCK_TRUSTED, NULL);
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
hci_sock_free_cookie(sk);
|
|
break;
|
|
}
|
|
|
|
bt_sock_unlink(&hci_sk_list, sk);
|
|
|
|
if (hdev) {
|
|
if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
|
|
/* When releasing a user channel exclusive access,
|
|
* call hci_dev_do_close directly instead of calling
|
|
* hci_dev_close to ensure the exclusive access will
|
|
* be released and the controller brought back down.
|
|
*
|
|
* The checking of HCI_AUTO_OFF is not needed in this
|
|
* case since it will have been cleared already when
|
|
* opening the user channel.
|
|
*/
|
|
hci_dev_do_close(hdev);
|
|
hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
|
|
mgmt_index_added(hdev);
|
|
}
|
|
|
|
atomic_dec(&hdev->promisc);
|
|
hci_dev_put(hdev);
|
|
}
|
|
|
|
sock_orphan(sk);
|
|
|
|
skb_queue_purge(&sk->sk_receive_queue);
|
|
skb_queue_purge(&sk->sk_write_queue);
|
|
|
|
sock_put(sk);
|
|
return 0;
|
|
}
|
|
|
|
static int hci_sock_blacklist_add(struct hci_dev *hdev, void __user *arg)
|
|
{
|
|
bdaddr_t bdaddr;
|
|
int err;
|
|
|
|
if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
|
|
return -EFAULT;
|
|
|
|
hci_dev_lock(hdev);
|
|
|
|
err = hci_bdaddr_list_add(&hdev->blacklist, &bdaddr, BDADDR_BREDR);
|
|
|
|
hci_dev_unlock(hdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int hci_sock_blacklist_del(struct hci_dev *hdev, void __user *arg)
|
|
{
|
|
bdaddr_t bdaddr;
|
|
int err;
|
|
|
|
if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
|
|
return -EFAULT;
|
|
|
|
hci_dev_lock(hdev);
|
|
|
|
err = hci_bdaddr_list_del(&hdev->blacklist, &bdaddr, BDADDR_BREDR);
|
|
|
|
hci_dev_unlock(hdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
/* Ioctls that require bound socket */
|
|
static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct hci_dev *hdev = hci_pi(sk)->hdev;
|
|
|
|
if (!hdev)
|
|
return -EBADFD;
|
|
|
|
if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
|
|
return -EBUSY;
|
|
|
|
if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (hdev->dev_type != HCI_PRIMARY)
|
|
return -EOPNOTSUPP;
|
|
|
|
switch (cmd) {
|
|
case HCISETRAW:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
return -EOPNOTSUPP;
|
|
|
|
case HCIGETCONNINFO:
|
|
return hci_get_conn_info(hdev, (void __user *)arg);
|
|
|
|
case HCIGETAUTHINFO:
|
|
return hci_get_auth_info(hdev, (void __user *)arg);
|
|
|
|
case HCIBLOCKADDR:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
return hci_sock_blacklist_add(hdev, (void __user *)arg);
|
|
|
|
case HCIUNBLOCKADDR:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
return hci_sock_blacklist_del(hdev, (void __user *)arg);
|
|
}
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
void __user *argp = (void __user *)arg;
|
|
struct sock *sk = sock->sk;
|
|
int err;
|
|
|
|
BT_DBG("cmd %x arg %lx", cmd, arg);
|
|
|
|
lock_sock(sk);
|
|
|
|
if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
|
|
err = -EBADFD;
|
|
goto done;
|
|
}
|
|
|
|
/* When calling an ioctl on an unbound raw socket, then ensure
|
|
* that the monitor gets informed. Ensure that the resulting event
|
|
* is only send once by checking if the cookie exists or not. The
|
|
* socket cookie will be only ever generated once for the lifetime
|
|
* of a given socket.
|
|
*/
|
|
if (hci_sock_gen_cookie(sk)) {
|
|
struct sk_buff *skb;
|
|
|
|
if (capable(CAP_NET_ADMIN))
|
|
hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
|
|
|
|
/* Send event to monitor */
|
|
skb = create_monitor_ctrl_open(sk);
|
|
if (skb) {
|
|
hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
|
|
HCI_SOCK_TRUSTED, NULL);
|
|
kfree_skb(skb);
|
|
}
|
|
}
|
|
|
|
release_sock(sk);
|
|
|
|
switch (cmd) {
|
|
case HCIGETDEVLIST:
|
|
return hci_get_dev_list(argp);
|
|
|
|
case HCIGETDEVINFO:
|
|
return hci_get_dev_info(argp);
|
|
|
|
case HCIGETCONNLIST:
|
|
return hci_get_conn_list(argp);
|
|
|
|
case HCIDEVUP:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
return hci_dev_open(arg);
|
|
|
|
case HCIDEVDOWN:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
return hci_dev_close(arg);
|
|
|
|
case HCIDEVRESET:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
return hci_dev_reset(arg);
|
|
|
|
case HCIDEVRESTAT:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
return hci_dev_reset_stat(arg);
|
|
|
|
case HCISETSCAN:
|
|
case HCISETAUTH:
|
|
case HCISETENCRYPT:
|
|
case HCISETPTYPE:
|
|
case HCISETLINKPOL:
|
|
case HCISETLINKMODE:
|
|
case HCISETACLMTU:
|
|
case HCISETSCOMTU:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
return hci_dev_cmd(cmd, argp);
|
|
|
|
case HCIINQUIRY:
|
|
return hci_inquiry(argp);
|
|
}
|
|
|
|
lock_sock(sk);
|
|
|
|
err = hci_sock_bound_ioctl(sk, cmd, arg);
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
|
|
int addr_len)
|
|
{
|
|
struct sockaddr_hci haddr;
|
|
struct sock *sk = sock->sk;
|
|
struct hci_dev *hdev = NULL;
|
|
struct sk_buff *skb;
|
|
int len, err = 0;
|
|
|
|
BT_DBG("sock %p sk %p", sock, sk);
|
|
|
|
if (!addr)
|
|
return -EINVAL;
|
|
|
|
memset(&haddr, 0, sizeof(haddr));
|
|
len = min_t(unsigned int, sizeof(haddr), addr_len);
|
|
memcpy(&haddr, addr, len);
|
|
|
|
if (haddr.hci_family != AF_BLUETOOTH)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (sk->sk_state == BT_BOUND) {
|
|
err = -EALREADY;
|
|
goto done;
|
|
}
|
|
|
|
switch (haddr.hci_channel) {
|
|
case HCI_CHANNEL_RAW:
|
|
if (hci_pi(sk)->hdev) {
|
|
err = -EALREADY;
|
|
goto done;
|
|
}
|
|
|
|
if (haddr.hci_dev != HCI_DEV_NONE) {
|
|
hdev = hci_dev_get(haddr.hci_dev);
|
|
if (!hdev) {
|
|
err = -ENODEV;
|
|
goto done;
|
|
}
|
|
|
|
atomic_inc(&hdev->promisc);
|
|
}
|
|
|
|
hci_pi(sk)->channel = haddr.hci_channel;
|
|
|
|
if (!hci_sock_gen_cookie(sk)) {
|
|
/* In the case when a cookie has already been assigned,
|
|
* then there has been already an ioctl issued against
|
|
* an unbound socket and with that triggerd an open
|
|
* notification. Send a close notification first to
|
|
* allow the state transition to bounded.
|
|
*/
|
|
skb = create_monitor_ctrl_close(sk);
|
|
if (skb) {
|
|
hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
|
|
HCI_SOCK_TRUSTED, NULL);
|
|
kfree_skb(skb);
|
|
}
|
|
}
|
|
|
|
if (capable(CAP_NET_ADMIN))
|
|
hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
|
|
|
|
hci_pi(sk)->hdev = hdev;
|
|
|
|
/* Send event to monitor */
|
|
skb = create_monitor_ctrl_open(sk);
|
|
if (skb) {
|
|
hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
|
|
HCI_SOCK_TRUSTED, NULL);
|
|
kfree_skb(skb);
|
|
}
|
|
break;
|
|
|
|
case HCI_CHANNEL_USER:
|
|
if (hci_pi(sk)->hdev) {
|
|
err = -EALREADY;
|
|
goto done;
|
|
}
|
|
|
|
if (haddr.hci_dev == HCI_DEV_NONE) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
if (!capable(CAP_NET_ADMIN)) {
|
|
err = -EPERM;
|
|
goto done;
|
|
}
|
|
|
|
hdev = hci_dev_get(haddr.hci_dev);
|
|
if (!hdev) {
|
|
err = -ENODEV;
|
|
goto done;
|
|
}
|
|
|
|
if (test_bit(HCI_INIT, &hdev->flags) ||
|
|
hci_dev_test_flag(hdev, HCI_SETUP) ||
|
|
hci_dev_test_flag(hdev, HCI_CONFIG) ||
|
|
(!hci_dev_test_flag(hdev, HCI_AUTO_OFF) &&
|
|
test_bit(HCI_UP, &hdev->flags))) {
|
|
err = -EBUSY;
|
|
hci_dev_put(hdev);
|
|
goto done;
|
|
}
|
|
|
|
if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) {
|
|
err = -EUSERS;
|
|
hci_dev_put(hdev);
|
|
goto done;
|
|
}
|
|
|
|
mgmt_index_removed(hdev);
|
|
|
|
err = hci_dev_open(hdev->id);
|
|
if (err) {
|
|
if (err == -EALREADY) {
|
|
/* In case the transport is already up and
|
|
* running, clear the error here.
|
|
*
|
|
* This can happen when opening a user
|
|
* channel and HCI_AUTO_OFF grace period
|
|
* is still active.
|
|
*/
|
|
err = 0;
|
|
} else {
|
|
hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
|
|
mgmt_index_added(hdev);
|
|
hci_dev_put(hdev);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
hci_pi(sk)->channel = haddr.hci_channel;
|
|
|
|
if (!hci_sock_gen_cookie(sk)) {
|
|
/* In the case when a cookie has already been assigned,
|
|
* this socket will transition from a raw socket into
|
|
* a user channel socket. For a clean transition, send
|
|
* the close notification first.
|
|
*/
|
|
skb = create_monitor_ctrl_close(sk);
|
|
if (skb) {
|
|
hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
|
|
HCI_SOCK_TRUSTED, NULL);
|
|
kfree_skb(skb);
|
|
}
|
|
}
|
|
|
|
/* The user channel is restricted to CAP_NET_ADMIN
|
|
* capabilities and with that implicitly trusted.
|
|
*/
|
|
hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
|
|
|
|
hci_pi(sk)->hdev = hdev;
|
|
|
|
/* Send event to monitor */
|
|
skb = create_monitor_ctrl_open(sk);
|
|
if (skb) {
|
|
hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
|
|
HCI_SOCK_TRUSTED, NULL);
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
atomic_inc(&hdev->promisc);
|
|
break;
|
|
|
|
case HCI_CHANNEL_MONITOR:
|
|
if (haddr.hci_dev != HCI_DEV_NONE) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
if (!capable(CAP_NET_RAW)) {
|
|
err = -EPERM;
|
|
goto done;
|
|
}
|
|
|
|
hci_pi(sk)->channel = haddr.hci_channel;
|
|
|
|
/* The monitor interface is restricted to CAP_NET_RAW
|
|
* capabilities and with that implicitly trusted.
|
|
*/
|
|
hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
|
|
|
|
send_monitor_note(sk, "Linux version %s (%s)",
|
|
init_utsname()->release,
|
|
init_utsname()->machine);
|
|
send_monitor_note(sk, "Bluetooth subsystem version %u.%u",
|
|
BT_SUBSYS_VERSION, BT_SUBSYS_REVISION);
|
|
send_monitor_replay(sk);
|
|
send_monitor_control_replay(sk);
|
|
|
|
atomic_inc(&monitor_promisc);
|
|
break;
|
|
|
|
case HCI_CHANNEL_LOGGING:
|
|
if (haddr.hci_dev != HCI_DEV_NONE) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
if (!capable(CAP_NET_ADMIN)) {
|
|
err = -EPERM;
|
|
goto done;
|
|
}
|
|
|
|
hci_pi(sk)->channel = haddr.hci_channel;
|
|
break;
|
|
|
|
default:
|
|
if (!hci_mgmt_chan_find(haddr.hci_channel)) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
if (haddr.hci_dev != HCI_DEV_NONE) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
/* Users with CAP_NET_ADMIN capabilities are allowed
|
|
* access to all management commands and events. For
|
|
* untrusted users the interface is restricted and
|
|
* also only untrusted events are sent.
|
|
*/
|
|
if (capable(CAP_NET_ADMIN))
|
|
hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
|
|
|
|
hci_pi(sk)->channel = haddr.hci_channel;
|
|
|
|
/* At the moment the index and unconfigured index events
|
|
* are enabled unconditionally. Setting them on each
|
|
* socket when binding keeps this functionality. They
|
|
* however might be cleared later and then sending of these
|
|
* events will be disabled, but that is then intentional.
|
|
*
|
|
* This also enables generic events that are safe to be
|
|
* received by untrusted users. Example for such events
|
|
* are changes to settings, class of device, name etc.
|
|
*/
|
|
if (hci_pi(sk)->channel == HCI_CHANNEL_CONTROL) {
|
|
if (!hci_sock_gen_cookie(sk)) {
|
|
/* In the case when a cookie has already been
|
|
* assigned, this socket will transtion from
|
|
* a raw socket into a control socket. To
|
|
* allow for a clean transtion, send the
|
|
* close notification first.
|
|
*/
|
|
skb = create_monitor_ctrl_close(sk);
|
|
if (skb) {
|
|
hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
|
|
HCI_SOCK_TRUSTED, NULL);
|
|
kfree_skb(skb);
|
|
}
|
|
}
|
|
|
|
/* Send event to monitor */
|
|
skb = create_monitor_ctrl_open(sk);
|
|
if (skb) {
|
|
hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
|
|
HCI_SOCK_TRUSTED, NULL);
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS);
|
|
hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
|
|
hci_sock_set_flag(sk, HCI_MGMT_OPTION_EVENTS);
|
|
hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS);
|
|
hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
|
|
hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);
|
|
}
|
|
break;
|
|
}
|
|
|
|
sk->sk_state = BT_BOUND;
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
|
|
int *addr_len, int peer)
|
|
{
|
|
struct sockaddr_hci *haddr = (struct sockaddr_hci *)addr;
|
|
struct sock *sk = sock->sk;
|
|
struct hci_dev *hdev;
|
|
int err = 0;
|
|
|
|
BT_DBG("sock %p sk %p", sock, sk);
|
|
|
|
if (peer)
|
|
return -EOPNOTSUPP;
|
|
|
|
lock_sock(sk);
|
|
|
|
hdev = hci_pi(sk)->hdev;
|
|
if (!hdev) {
|
|
err = -EBADFD;
|
|
goto done;
|
|
}
|
|
|
|
*addr_len = sizeof(*haddr);
|
|
haddr->hci_family = AF_BLUETOOTH;
|
|
haddr->hci_dev = hdev->id;
|
|
haddr->hci_channel= hci_pi(sk)->channel;
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
|
|
struct sk_buff *skb)
|
|
{
|
|
__u32 mask = hci_pi(sk)->cmsg_mask;
|
|
|
|
if (mask & HCI_CMSG_DIR) {
|
|
int incoming = bt_cb(skb)->incoming;
|
|
put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming),
|
|
&incoming);
|
|
}
|
|
|
|
if (mask & HCI_CMSG_TSTAMP) {
|
|
#ifdef CONFIG_COMPAT
|
|
struct compat_timeval ctv;
|
|
#endif
|
|
struct timeval tv;
|
|
void *data;
|
|
int len;
|
|
|
|
skb_get_timestamp(skb, &tv);
|
|
|
|
data = &tv;
|
|
len = sizeof(tv);
|
|
#ifdef CONFIG_COMPAT
|
|
if (!COMPAT_USE_64BIT_TIME &&
|
|
(msg->msg_flags & MSG_CMSG_COMPAT)) {
|
|
ctv.tv_sec = tv.tv_sec;
|
|
ctv.tv_usec = tv.tv_usec;
|
|
data = &ctv;
|
|
len = sizeof(ctv);
|
|
}
|
|
#endif
|
|
|
|
put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
|
|
}
|
|
}
|
|
|
|
static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg,
|
|
size_t len, int flags)
|
|
{
|
|
int noblock = flags & MSG_DONTWAIT;
|
|
struct sock *sk = sock->sk;
|
|
struct sk_buff *skb;
|
|
int copied, err;
|
|
unsigned int skblen;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
if (flags & MSG_OOB)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (hci_pi(sk)->channel == HCI_CHANNEL_LOGGING)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (sk->sk_state == BT_CLOSED)
|
|
return 0;
|
|
|
|
skb = skb_recv_datagram(sk, flags, noblock, &err);
|
|
if (!skb)
|
|
return err;
|
|
|
|
skblen = skb->len;
|
|
copied = skb->len;
|
|
if (len < copied) {
|
|
msg->msg_flags |= MSG_TRUNC;
|
|
copied = len;
|
|
}
|
|
|
|
skb_reset_transport_header(skb);
|
|
err = skb_copy_datagram_msg(skb, 0, msg, copied);
|
|
|
|
switch (hci_pi(sk)->channel) {
|
|
case HCI_CHANNEL_RAW:
|
|
hci_sock_cmsg(sk, msg, skb);
|
|
break;
|
|
case HCI_CHANNEL_USER:
|
|
case HCI_CHANNEL_MONITOR:
|
|
sock_recv_timestamp(msg, sk, skb);
|
|
break;
|
|
default:
|
|
if (hci_mgmt_chan_find(hci_pi(sk)->channel))
|
|
sock_recv_timestamp(msg, sk, skb);
|
|
break;
|
|
}
|
|
|
|
skb_free_datagram(sk, skb);
|
|
|
|
if (flags & MSG_TRUNC)
|
|
copied = skblen;
|
|
|
|
return err ? : copied;
|
|
}
|
|
|
|
static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk,
|
|
struct msghdr *msg, size_t msglen)
|
|
{
|
|
void *buf;
|
|
u8 *cp;
|
|
struct mgmt_hdr *hdr;
|
|
u16 opcode, index, len;
|
|
struct hci_dev *hdev = NULL;
|
|
const struct hci_mgmt_handler *handler;
|
|
bool var_len, no_hdev;
|
|
int err;
|
|
|
|
BT_DBG("got %zu bytes", msglen);
|
|
|
|
if (msglen < sizeof(*hdr))
|
|
return -EINVAL;
|
|
|
|
buf = kmalloc(msglen, GFP_KERNEL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
if (memcpy_from_msg(buf, msg, msglen)) {
|
|
err = -EFAULT;
|
|
goto done;
|
|
}
|
|
|
|
hdr = buf;
|
|
opcode = __le16_to_cpu(hdr->opcode);
|
|
index = __le16_to_cpu(hdr->index);
|
|
len = __le16_to_cpu(hdr->len);
|
|
|
|
if (len != msglen - sizeof(*hdr)) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
if (chan->channel == HCI_CHANNEL_CONTROL) {
|
|
struct sk_buff *skb;
|
|
|
|
/* Send event to monitor */
|
|
skb = create_monitor_ctrl_command(sk, index, opcode, len,
|
|
buf + sizeof(*hdr));
|
|
if (skb) {
|
|
hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
|
|
HCI_SOCK_TRUSTED, NULL);
|
|
kfree_skb(skb);
|
|
}
|
|
}
|
|
|
|
if (opcode >= chan->handler_count ||
|
|
chan->handlers[opcode].func == NULL) {
|
|
BT_DBG("Unknown op %u", opcode);
|
|
err = mgmt_cmd_status(sk, index, opcode,
|
|
MGMT_STATUS_UNKNOWN_COMMAND);
|
|
goto done;
|
|
}
|
|
|
|
handler = &chan->handlers[opcode];
|
|
|
|
if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) &&
|
|
!(handler->flags & HCI_MGMT_UNTRUSTED)) {
|
|
err = mgmt_cmd_status(sk, index, opcode,
|
|
MGMT_STATUS_PERMISSION_DENIED);
|
|
goto done;
|
|
}
|
|
|
|
if (index != MGMT_INDEX_NONE) {
|
|
hdev = hci_dev_get(index);
|
|
if (!hdev) {
|
|
err = mgmt_cmd_status(sk, index, opcode,
|
|
MGMT_STATUS_INVALID_INDEX);
|
|
goto done;
|
|
}
|
|
|
|
if (hci_dev_test_flag(hdev, HCI_SETUP) ||
|
|
hci_dev_test_flag(hdev, HCI_CONFIG) ||
|
|
hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
|
|
err = mgmt_cmd_status(sk, index, opcode,
|
|
MGMT_STATUS_INVALID_INDEX);
|
|
goto done;
|
|
}
|
|
|
|
if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
|
|
!(handler->flags & HCI_MGMT_UNCONFIGURED)) {
|
|
err = mgmt_cmd_status(sk, index, opcode,
|
|
MGMT_STATUS_INVALID_INDEX);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
no_hdev = (handler->flags & HCI_MGMT_NO_HDEV);
|
|
if (no_hdev != !hdev) {
|
|
err = mgmt_cmd_status(sk, index, opcode,
|
|
MGMT_STATUS_INVALID_INDEX);
|
|
goto done;
|
|
}
|
|
|
|
var_len = (handler->flags & HCI_MGMT_VAR_LEN);
|
|
if ((var_len && len < handler->data_len) ||
|
|
(!var_len && len != handler->data_len)) {
|
|
err = mgmt_cmd_status(sk, index, opcode,
|
|
MGMT_STATUS_INVALID_PARAMS);
|
|
goto done;
|
|
}
|
|
|
|
if (hdev && chan->hdev_init)
|
|
chan->hdev_init(sk, hdev);
|
|
|
|
cp = buf + sizeof(*hdr);
|
|
|
|
err = handler->func(sk, hdev, cp, len);
|
|
if (err < 0)
|
|
goto done;
|
|
|
|
err = msglen;
|
|
|
|
done:
|
|
if (hdev)
|
|
hci_dev_put(hdev);
|
|
|
|
kfree(buf);
|
|
return err;
|
|
}
|
|
|
|
static int hci_logging_frame(struct sock *sk, struct msghdr *msg, int len)
|
|
{
|
|
struct hci_mon_hdr *hdr;
|
|
struct sk_buff *skb;
|
|
struct hci_dev *hdev;
|
|
u16 index;
|
|
int err;
|
|
|
|
/* The logging frame consists at minimum of the standard header,
|
|
* the priority byte, the ident length byte and at least one string
|
|
* terminator NUL byte. Anything shorter are invalid packets.
|
|
*/
|
|
if (len < sizeof(*hdr) + 3)
|
|
return -EINVAL;
|
|
|
|
skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
|
|
if (!skb)
|
|
return err;
|
|
|
|
if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
|
|
err = -EFAULT;
|
|
goto drop;
|
|
}
|
|
|
|
hdr = (void *)skb->data;
|
|
|
|
if (__le16_to_cpu(hdr->len) != len - sizeof(*hdr)) {
|
|
err = -EINVAL;
|
|
goto drop;
|
|
}
|
|
|
|
if (__le16_to_cpu(hdr->opcode) == 0x0000) {
|
|
__u8 priority = skb->data[sizeof(*hdr)];
|
|
__u8 ident_len = skb->data[sizeof(*hdr) + 1];
|
|
|
|
/* Only the priorities 0-7 are valid and with that any other
|
|
* value results in an invalid packet.
|
|
*
|
|
* The priority byte is followed by an ident length byte and
|
|
* the NUL terminated ident string. Check that the ident
|
|
* length is not overflowing the packet and also that the
|
|
* ident string itself is NUL terminated. In case the ident
|
|
* length is zero, the length value actually doubles as NUL
|
|
* terminator identifier.
|
|
*
|
|
* The message follows the ident string (if present) and
|
|
* must be NUL terminated. Otherwise it is not a valid packet.
|
|
*/
|
|
if (priority > 7 || skb->data[len - 1] != 0x00 ||
|
|
ident_len > len - sizeof(*hdr) - 3 ||
|
|
skb->data[sizeof(*hdr) + ident_len + 1] != 0x00) {
|
|
err = -EINVAL;
|
|
goto drop;
|
|
}
|
|
} else {
|
|
err = -EINVAL;
|
|
goto drop;
|
|
}
|
|
|
|
index = __le16_to_cpu(hdr->index);
|
|
|
|
if (index != MGMT_INDEX_NONE) {
|
|
hdev = hci_dev_get(index);
|
|
if (!hdev) {
|
|
err = -ENODEV;
|
|
goto drop;
|
|
}
|
|
} else {
|
|
hdev = NULL;
|
|
}
|
|
|
|
hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING);
|
|
|
|
hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL);
|
|
err = len;
|
|
|
|
if (hdev)
|
|
hci_dev_put(hdev);
|
|
|
|
drop:
|
|
kfree_skb(skb);
|
|
return err;
|
|
}
|
|
|
|
static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
|
|
size_t len)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct hci_mgmt_chan *chan;
|
|
struct hci_dev *hdev;
|
|
struct sk_buff *skb;
|
|
int err;
|
|
|
|
BT_DBG("sock %p sk %p", sock, sk);
|
|
|
|
if (msg->msg_flags & MSG_OOB)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE|
|
|
MSG_CMSG_COMPAT))
|
|
return -EINVAL;
|
|
|
|
if (len < 4 || len > HCI_MAX_FRAME_SIZE)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (hci_pi(sk)->channel) {
|
|
case HCI_CHANNEL_RAW:
|
|
case HCI_CHANNEL_USER:
|
|
break;
|
|
case HCI_CHANNEL_MONITOR:
|
|
err = -EOPNOTSUPP;
|
|
goto done;
|
|
case HCI_CHANNEL_LOGGING:
|
|
err = hci_logging_frame(sk, msg, len);
|
|
goto done;
|
|
default:
|
|
mutex_lock(&mgmt_chan_list_lock);
|
|
chan = __hci_mgmt_chan_find(hci_pi(sk)->channel);
|
|
if (chan)
|
|
err = hci_mgmt_cmd(chan, sk, msg, len);
|
|
else
|
|
err = -EINVAL;
|
|
|
|
mutex_unlock(&mgmt_chan_list_lock);
|
|
goto done;
|
|
}
|
|
|
|
hdev = hci_pi(sk)->hdev;
|
|
if (!hdev) {
|
|
err = -EBADFD;
|
|
goto done;
|
|
}
|
|
|
|
if (!test_bit(HCI_UP, &hdev->flags)) {
|
|
err = -ENETDOWN;
|
|
goto done;
|
|
}
|
|
|
|
skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
|
|
if (!skb)
|
|
goto done;
|
|
|
|
if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
|
|
err = -EFAULT;
|
|
goto drop;
|
|
}
|
|
|
|
hci_skb_pkt_type(skb) = skb->data[0];
|
|
skb_pull(skb, 1);
|
|
|
|
if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
|
|
/* No permission check is needed for user channel
|
|
* since that gets enforced when binding the socket.
|
|
*
|
|
* However check that the packet type is valid.
|
|
*/
|
|
if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
|
|
hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
|
|
hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) {
|
|
err = -EINVAL;
|
|
goto drop;
|
|
}
|
|
|
|
skb_queue_tail(&hdev->raw_q, skb);
|
|
queue_work(hdev->workqueue, &hdev->tx_work);
|
|
} else if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT) {
|
|
u16 opcode = get_unaligned_le16(skb->data);
|
|
u16 ogf = hci_opcode_ogf(opcode);
|
|
u16 ocf = hci_opcode_ocf(opcode);
|
|
|
|
if (((ogf > HCI_SFLT_MAX_OGF) ||
|
|
!hci_test_bit(ocf & HCI_FLT_OCF_BITS,
|
|
&hci_sec_filter.ocf_mask[ogf])) &&
|
|
!capable(CAP_NET_RAW)) {
|
|
err = -EPERM;
|
|
goto drop;
|
|
}
|
|
|
|
/* Since the opcode has already been extracted here, store
|
|
* a copy of the value for later use by the drivers.
|
|
*/
|
|
hci_skb_opcode(skb) = opcode;
|
|
|
|
if (ogf == 0x3f) {
|
|
skb_queue_tail(&hdev->raw_q, skb);
|
|
queue_work(hdev->workqueue, &hdev->tx_work);
|
|
} else {
|
|
/* Stand-alone HCI commands must be flagged as
|
|
* single-command requests.
|
|
*/
|
|
bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
|
|
|
|
skb_queue_tail(&hdev->cmd_q, skb);
|
|
queue_work(hdev->workqueue, &hdev->cmd_work);
|
|
}
|
|
} else {
|
|
if (!capable(CAP_NET_RAW)) {
|
|
err = -EPERM;
|
|
goto drop;
|
|
}
|
|
|
|
if (hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
|
|
hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) {
|
|
err = -EINVAL;
|
|
goto drop;
|
|
}
|
|
|
|
skb_queue_tail(&hdev->raw_q, skb);
|
|
queue_work(hdev->workqueue, &hdev->tx_work);
|
|
}
|
|
|
|
err = len;
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
|
|
drop:
|
|
kfree_skb(skb);
|
|
goto done;
|
|
}
|
|
|
|
static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
|
|
char __user *optval, unsigned int len)
|
|
{
|
|
struct hci_ufilter uf = { .opcode = 0 };
|
|
struct sock *sk = sock->sk;
|
|
int err = 0, opt = 0;
|
|
|
|
BT_DBG("sk %p, opt %d", sk, optname);
|
|
|
|
if (level != SOL_HCI)
|
|
return -ENOPROTOOPT;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
|
|
err = -EBADFD;
|
|
goto done;
|
|
}
|
|
|
|
switch (optname) {
|
|
case HCI_DATA_DIR:
|
|
if (get_user(opt, (int __user *)optval)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (opt)
|
|
hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
|
|
else
|
|
hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
|
|
break;
|
|
|
|
case HCI_TIME_STAMP:
|
|
if (get_user(opt, (int __user *)optval)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (opt)
|
|
hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
|
|
else
|
|
hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
|
|
break;
|
|
|
|
case HCI_FILTER:
|
|
{
|
|
struct hci_filter *f = &hci_pi(sk)->filter;
|
|
|
|
uf.type_mask = f->type_mask;
|
|
uf.opcode = f->opcode;
|
|
uf.event_mask[0] = *((u32 *) f->event_mask + 0);
|
|
uf.event_mask[1] = *((u32 *) f->event_mask + 1);
|
|
}
|
|
|
|
len = min_t(unsigned int, len, sizeof(uf));
|
|
if (copy_from_user(&uf, optval, len)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (!capable(CAP_NET_RAW)) {
|
|
uf.type_mask &= hci_sec_filter.type_mask;
|
|
uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
|
|
uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
|
|
}
|
|
|
|
{
|
|
struct hci_filter *f = &hci_pi(sk)->filter;
|
|
|
|
f->type_mask = uf.type_mask;
|
|
f->opcode = uf.opcode;
|
|
*((u32 *) f->event_mask + 0) = uf.event_mask[0];
|
|
*((u32 *) f->event_mask + 1) = uf.event_mask[1];
|
|
}
|
|
break;
|
|
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int hci_sock_getsockopt(struct socket *sock, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct hci_ufilter uf;
|
|
struct sock *sk = sock->sk;
|
|
int len, opt, err = 0;
|
|
|
|
BT_DBG("sk %p, opt %d", sk, optname);
|
|
|
|
if (level != SOL_HCI)
|
|
return -ENOPROTOOPT;
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
|
|
err = -EBADFD;
|
|
goto done;
|
|
}
|
|
|
|
switch (optname) {
|
|
case HCI_DATA_DIR:
|
|
if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
|
|
opt = 1;
|
|
else
|
|
opt = 0;
|
|
|
|
if (put_user(opt, optval))
|
|
err = -EFAULT;
|
|
break;
|
|
|
|
case HCI_TIME_STAMP:
|
|
if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
|
|
opt = 1;
|
|
else
|
|
opt = 0;
|
|
|
|
if (put_user(opt, optval))
|
|
err = -EFAULT;
|
|
break;
|
|
|
|
case HCI_FILTER:
|
|
{
|
|
struct hci_filter *f = &hci_pi(sk)->filter;
|
|
|
|
memset(&uf, 0, sizeof(uf));
|
|
uf.type_mask = f->type_mask;
|
|
uf.opcode = f->opcode;
|
|
uf.event_mask[0] = *((u32 *) f->event_mask + 0);
|
|
uf.event_mask[1] = *((u32 *) f->event_mask + 1);
|
|
}
|
|
|
|
len = min_t(unsigned int, len, sizeof(uf));
|
|
if (copy_to_user(optval, &uf, len))
|
|
err = -EFAULT;
|
|
break;
|
|
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static const struct proto_ops hci_sock_ops = {
|
|
.family = PF_BLUETOOTH,
|
|
.owner = THIS_MODULE,
|
|
.release = hci_sock_release,
|
|
.bind = hci_sock_bind,
|
|
.getname = hci_sock_getname,
|
|
.sendmsg = hci_sock_sendmsg,
|
|
.recvmsg = hci_sock_recvmsg,
|
|
.ioctl = hci_sock_ioctl,
|
|
.poll = datagram_poll,
|
|
.listen = sock_no_listen,
|
|
.shutdown = sock_no_shutdown,
|
|
.setsockopt = hci_sock_setsockopt,
|
|
.getsockopt = hci_sock_getsockopt,
|
|
.connect = sock_no_connect,
|
|
.socketpair = sock_no_socketpair,
|
|
.accept = sock_no_accept,
|
|
.mmap = sock_no_mmap
|
|
};
|
|
|
|
static struct proto hci_sk_proto = {
|
|
.name = "HCI",
|
|
.owner = THIS_MODULE,
|
|
.obj_size = sizeof(struct hci_pinfo)
|
|
};
|
|
|
|
static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
|
|
int kern)
|
|
{
|
|
struct sock *sk;
|
|
|
|
BT_DBG("sock %p", sock);
|
|
|
|
if (sock->type != SOCK_RAW)
|
|
return -ESOCKTNOSUPPORT;
|
|
|
|
sock->ops = &hci_sock_ops;
|
|
|
|
sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern);
|
|
if (!sk)
|
|
return -ENOMEM;
|
|
|
|
sock_init_data(sock, sk);
|
|
|
|
sock_reset_flag(sk, SOCK_ZAPPED);
|
|
|
|
sk->sk_protocol = protocol;
|
|
|
|
sock->state = SS_UNCONNECTED;
|
|
sk->sk_state = BT_OPEN;
|
|
|
|
bt_sock_link(&hci_sk_list, sk);
|
|
return 0;
|
|
}
|
|
|
|
static const struct net_proto_family hci_sock_family_ops = {
|
|
.family = PF_BLUETOOTH,
|
|
.owner = THIS_MODULE,
|
|
.create = hci_sock_create,
|
|
};
|
|
|
|
int __init hci_sock_init(void)
|
|
{
|
|
int err;
|
|
|
|
BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr));
|
|
|
|
err = proto_register(&hci_sk_proto, 0);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
|
|
if (err < 0) {
|
|
BT_ERR("HCI socket registration failed");
|
|
goto error;
|
|
}
|
|
|
|
err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL);
|
|
if (err < 0) {
|
|
BT_ERR("Failed to create HCI proc file");
|
|
bt_sock_unregister(BTPROTO_HCI);
|
|
goto error;
|
|
}
|
|
|
|
BT_INFO("HCI socket layer initialized");
|
|
|
|
return 0;
|
|
|
|
error:
|
|
proto_unregister(&hci_sk_proto);
|
|
return err;
|
|
}
|
|
|
|
void hci_sock_cleanup(void)
|
|
{
|
|
bt_procfs_cleanup(&init_net, "hci");
|
|
bt_sock_unregister(BTPROTO_HCI);
|
|
proto_unregister(&hci_sk_proto);
|
|
}
|