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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Mathias Krause](/assets/img/avatar_default.png)
The HCI code fails to initialize the hci_channel member of struct sockaddr_hci and that for leaks two bytes kernel stack via the getsockname() syscall. Initialize hci_channel with 0 to avoid the info leak. Signed-off-by: Mathias Krause <minipli@googlemail.com> Cc: Marcel Holtmann <marcel@holtmann.org> Cc: Gustavo Padovan <gustavo@padovan.org> Cc: Johan Hedberg <johan.hedberg@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1124 lines
22 KiB
C
1124 lines
22 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 <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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static atomic_t monitor_promisc = ATOMIC_INIT(0);
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/* ----- HCI socket interface ----- */
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static inline int hci_test_bit(int nr, void *addr)
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{
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return *((__u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
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}
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/* Security filter */
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static 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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/* 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 hlist_node *node;
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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, node, &hci_sk_list.head) {
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struct hci_filter *flt;
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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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continue;
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/* Apply filter */
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flt = &hci_pi(sk)->filter;
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if (!test_bit((bt_cb(skb)->pkt_type == HCI_VENDOR_PKT) ?
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0 : (bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS),
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&flt->type_mask))
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continue;
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if (bt_cb(skb)->pkt_type == HCI_EVENT_PKT) {
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int evt = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS);
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if (!hci_test_bit(evt, &flt->event_mask))
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continue;
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if (flt->opcode &&
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((evt == HCI_EV_CMD_COMPLETE &&
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flt->opcode !=
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get_unaligned((__le16 *)(skb->data + 3))) ||
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(evt == HCI_EV_CMD_STATUS &&
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flt->opcode !=
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get_unaligned((__le16 *)(skb->data + 4)))))
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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(skb, 1, GFP_ATOMIC);
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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), &bt_cb(skb)->pkt_type, 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 control socket */
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void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk)
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{
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struct sock *sk;
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struct hlist_node *node;
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BT_DBG("len %d", skb->len);
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read_lock(&hci_sk_list.lock);
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sk_for_each(sk, node, &hci_sk_list.head) {
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struct sk_buff *nskb;
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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 != HCI_CHANNEL_CONTROL)
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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 sock *sk;
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struct hlist_node *node;
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struct sk_buff *skb_copy = NULL;
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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 (bt_cb(skb)->pkt_type) {
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case HCI_COMMAND_PKT:
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opcode = __constant_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 = __constant_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 = __constant_cpu_to_le16(HCI_MON_ACL_RX_PKT);
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else
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opcode = __constant_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 = __constant_cpu_to_le16(HCI_MON_SCO_RX_PKT);
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else
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opcode = __constant_cpu_to_le16(HCI_MON_SCO_TX_PKT);
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break;
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default:
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return;
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}
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read_lock(&hci_sk_list.lock);
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sk_for_each(sk, node, &hci_sk_list.head) {
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struct sk_buff *nskb;
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if (sk->sk_state != BT_BOUND)
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continue;
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if (hci_pi(sk)->channel != HCI_CHANNEL_MONITOR)
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continue;
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if (!skb_copy) {
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struct hci_mon_hdr *hdr;
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/* Create a private copy with headroom */
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skb_copy = __pskb_copy(skb, HCI_MON_HDR_SIZE,
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GFP_ATOMIC);
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if (!skb_copy)
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continue;
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/* Put header before the data */
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hdr = (void *) 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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}
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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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static void send_monitor_event(struct sk_buff *skb)
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{
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struct sock *sk;
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struct hlist_node *node;
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BT_DBG("len %d", skb->len);
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read_lock(&hci_sk_list.lock);
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sk_for_each(sk, node, &hci_sk_list.head) {
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struct sk_buff *nskb;
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if (sk->sk_state != BT_BOUND)
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continue;
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if (hci_pi(sk)->channel != HCI_CHANNEL_MONITOR)
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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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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 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 = (void *) 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 = __constant_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 = __constant_cpu_to_le16(HCI_MON_DEL_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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__net_timestamp(skb);
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hdr = (void *) 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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static void send_monitor_replay(struct sock *sk)
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{
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struct hci_dev *hdev;
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read_lock(&hci_dev_list_lock);
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list_for_each_entry(hdev, &hci_dev_list, list) {
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struct sk_buff *skb;
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skb = create_monitor_event(hdev, HCI_DEV_REG);
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if (!skb)
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continue;
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if (sock_queue_rcv_skb(sk, skb))
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kfree_skb(skb);
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}
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read_unlock(&hci_dev_list_lock);
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}
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/* Generate internal stack event */
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static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data)
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{
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struct hci_event_hdr *hdr;
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struct hci_ev_stack_internal *ev;
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struct sk_buff *skb;
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skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC);
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if (!skb)
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return;
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hdr = (void *) skb_put(skb, HCI_EVENT_HDR_SIZE);
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hdr->evt = HCI_EV_STACK_INTERNAL;
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hdr->plen = sizeof(*ev) + dlen;
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ev = (void *) skb_put(skb, sizeof(*ev) + dlen);
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ev->type = type;
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memcpy(ev->data, data, dlen);
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bt_cb(skb)->incoming = 1;
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__net_timestamp(skb);
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bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
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skb->dev = (void *) hdev;
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hci_send_to_sock(hdev, skb);
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kfree_skb(skb);
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}
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void hci_sock_dev_event(struct hci_dev *hdev, int event)
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{
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struct hci_ev_si_device ev;
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BT_DBG("hdev %s event %d", hdev->name, event);
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/* Send event to monitor */
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if (atomic_read(&monitor_promisc)) {
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struct sk_buff *skb;
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skb = create_monitor_event(hdev, event);
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if (skb) {
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send_monitor_event(skb);
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kfree_skb(skb);
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}
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}
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/* Send event to sockets */
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ev.event = event;
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ev.dev_id = hdev->id;
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hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev);
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if (event == HCI_DEV_UNREG) {
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struct sock *sk;
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struct hlist_node *node;
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/* Detach sockets from device */
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read_lock(&hci_sk_list.lock);
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sk_for_each(sk, node, &hci_sk_list.head) {
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bh_lock_sock_nested(sk);
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if (hci_pi(sk)->hdev == hdev) {
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hci_pi(sk)->hdev = NULL;
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sk->sk_err = EPIPE;
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sk->sk_state = BT_OPEN;
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sk->sk_state_change(sk);
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hci_dev_put(hdev);
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}
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bh_unlock_sock(sk);
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}
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read_unlock(&hci_sk_list.lock);
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}
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}
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static int hci_sock_release(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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struct hci_dev *hdev;
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BT_DBG("sock %p sk %p", sock, sk);
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if (!sk)
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return 0;
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hdev = hci_pi(sk)->hdev;
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if (hci_pi(sk)->channel == HCI_CHANNEL_MONITOR)
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atomic_dec(&monitor_promisc);
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bt_sock_unlink(&hci_sk_list, sk);
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if (hdev) {
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atomic_dec(&hdev->promisc);
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hci_dev_put(hdev);
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}
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sock_orphan(sk);
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skb_queue_purge(&sk->sk_receive_queue);
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skb_queue_purge(&sk->sk_write_queue);
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sock_put(sk);
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return 0;
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}
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static int hci_sock_blacklist_add(struct hci_dev *hdev, void __user *arg)
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{
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bdaddr_t bdaddr;
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int err;
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if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
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return -EFAULT;
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hci_dev_lock(hdev);
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err = hci_blacklist_add(hdev, &bdaddr, 0);
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|
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hci_dev_unlock(hdev);
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return err;
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}
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|
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static int hci_sock_blacklist_del(struct hci_dev *hdev, void __user *arg)
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{
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bdaddr_t bdaddr;
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int err;
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|
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if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
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return -EFAULT;
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|
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hci_dev_lock(hdev);
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err = hci_blacklist_del(hdev, &bdaddr, 0);
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|
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hci_dev_unlock(hdev);
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|
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return err;
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}
|
|
|
|
/* Ioctls that require bound socket */
|
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static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct hci_dev *hdev = hci_pi(sk)->hdev;
|
|
|
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if (!hdev)
|
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return -EBADFD;
|
|
|
|
switch (cmd) {
|
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case HCISETRAW:
|
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if (!capable(CAP_NET_ADMIN))
|
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return -EACCES;
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|
|
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if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
|
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return -EPERM;
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|
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if (arg)
|
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set_bit(HCI_RAW, &hdev->flags);
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else
|
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clear_bit(HCI_RAW, &hdev->flags);
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|
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return 0;
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|
|
case HCIGETCONNINFO:
|
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return hci_get_conn_info(hdev, (void __user *) arg);
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|
|
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case HCIGETAUTHINFO:
|
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return hci_get_auth_info(hdev, (void __user *) arg);
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|
|
case HCIBLOCKADDR:
|
|
if (!capable(CAP_NET_ADMIN))
|
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return -EACCES;
|
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return hci_sock_blacklist_add(hdev, (void __user *) arg);
|
|
|
|
case HCIUNBLOCKADDR:
|
|
if (!capable(CAP_NET_ADMIN))
|
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return -EACCES;
|
|
return hci_sock_blacklist_del(hdev, (void __user *) arg);
|
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|
|
default:
|
|
if (hdev->ioctl)
|
|
return hdev->ioctl(hdev, cmd, arg);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
void __user *argp = (void __user *) arg;
|
|
int err;
|
|
|
|
BT_DBG("cmd %x arg %lx", cmd, arg);
|
|
|
|
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 -EACCES;
|
|
return hci_dev_open(arg);
|
|
|
|
case HCIDEVDOWN:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EACCES;
|
|
return hci_dev_close(arg);
|
|
|
|
case HCIDEVRESET:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EACCES;
|
|
return hci_dev_reset(arg);
|
|
|
|
case HCIDEVRESTAT:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EACCES;
|
|
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 -EACCES;
|
|
return hci_dev_cmd(cmd, argp);
|
|
|
|
case HCIINQUIRY:
|
|
return hci_inquiry(argp);
|
|
|
|
default:
|
|
lock_sock(sk);
|
|
err = hci_sock_bound_ioctl(sk, cmd, arg);
|
|
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;
|
|
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)->hdev = hdev;
|
|
break;
|
|
|
|
case HCI_CHANNEL_CONTROL:
|
|
if (haddr.hci_dev != HCI_DEV_NONE) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
if (!capable(CAP_NET_ADMIN)) {
|
|
err = -EPERM;
|
|
goto done;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
send_monitor_replay(sk);
|
|
|
|
atomic_inc(&monitor_promisc);
|
|
break;
|
|
|
|
default:
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
|
|
hci_pi(sk)->channel = haddr.hci_channel;
|
|
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 = hci_pi(sk)->hdev;
|
|
|
|
BT_DBG("sock %p sk %p", sock, sk);
|
|
|
|
if (!hdev)
|
|
return -EBADFD;
|
|
|
|
lock_sock(sk);
|
|
|
|
*addr_len = sizeof(*haddr);
|
|
haddr->hci_family = AF_BLUETOOTH;
|
|
haddr->hci_dev = hdev->id;
|
|
haddr->hci_channel= 0;
|
|
|
|
release_sock(sk);
|
|
return 0;
|
|
}
|
|
|
|
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 kiocb *iocb, 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;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
if (flags & (MSG_OOB))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (sk->sk_state == BT_CLOSED)
|
|
return 0;
|
|
|
|
skb = skb_recv_datagram(sk, flags, noblock, &err);
|
|
if (!skb)
|
|
return err;
|
|
|
|
msg->msg_namelen = 0;
|
|
|
|
copied = skb->len;
|
|
if (len < copied) {
|
|
msg->msg_flags |= MSG_TRUNC;
|
|
copied = len;
|
|
}
|
|
|
|
skb_reset_transport_header(skb);
|
|
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
|
|
|
|
switch (hci_pi(sk)->channel) {
|
|
case HCI_CHANNEL_RAW:
|
|
hci_sock_cmsg(sk, msg, skb);
|
|
break;
|
|
case HCI_CHANNEL_CONTROL:
|
|
case HCI_CHANNEL_MONITOR:
|
|
sock_recv_timestamp(msg, sk, skb);
|
|
break;
|
|
}
|
|
|
|
skb_free_datagram(sk, skb);
|
|
|
|
return err ? : copied;
|
|
}
|
|
|
|
static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
|
|
struct msghdr *msg, size_t len)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
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))
|
|
return -EINVAL;
|
|
|
|
if (len < 4 || len > HCI_MAX_FRAME_SIZE)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (hci_pi(sk)->channel) {
|
|
case HCI_CHANNEL_RAW:
|
|
break;
|
|
case HCI_CHANNEL_CONTROL:
|
|
err = mgmt_control(sk, msg, len);
|
|
goto done;
|
|
case HCI_CHANNEL_MONITOR:
|
|
err = -EOPNOTSUPP;
|
|
goto done;
|
|
default:
|
|
err = -EINVAL;
|
|
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_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
|
|
err = -EFAULT;
|
|
goto drop;
|
|
}
|
|
|
|
bt_cb(skb)->pkt_type = *((unsigned char *) skb->data);
|
|
skb_pull(skb, 1);
|
|
skb->dev = (void *) hdev;
|
|
|
|
if (bt_cb(skb)->pkt_type == 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;
|
|
}
|
|
|
|
if (test_bit(HCI_RAW, &hdev->flags) || (ogf == 0x3f)) {
|
|
skb_queue_tail(&hdev->raw_q, skb);
|
|
queue_work(hdev->workqueue, &hdev->tx_work);
|
|
} else {
|
|
skb_queue_tail(&hdev->cmd_q, skb);
|
|
queue_work(hdev->workqueue, &hdev->cmd_work);
|
|
}
|
|
} else {
|
|
if (!capable(CAP_NET_RAW)) {
|
|
err = -EPERM;
|
|
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);
|
|
|
|
lock_sock(sk);
|
|
|
|
if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
|
|
err = -EINVAL;
|
|
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 (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
|
|
err = -EINVAL;
|
|
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);
|
|
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;
|
|
|
|
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)
|
|
goto error;
|
|
|
|
BT_INFO("HCI socket layer initialized");
|
|
|
|
return 0;
|
|
|
|
error:
|
|
BT_ERR("HCI socket registration failed");
|
|
proto_unregister(&hci_sk_proto);
|
|
return err;
|
|
}
|
|
|
|
void hci_sock_cleanup(void)
|
|
{
|
|
if (bt_sock_unregister(BTPROTO_HCI) < 0)
|
|
BT_ERR("HCI socket unregistration failed");
|
|
|
|
proto_unregister(&hci_sk_proto);
|
|
}
|