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-rw-r--r--include/net/bluetooth/hci_core.h1
-rw-r--r--include/net/bluetooth/mgmt.h16
-rw-r--r--net/bluetooth/hci_event.c5
-rw-r--r--net/bluetooth/mgmt.c142
4 files changed, 158 insertions, 6 deletions
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 2d046e07a586..ee5ec4f17a15 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -675,6 +675,7 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t len);
int mgmt_index_added(u16 index);
int mgmt_index_removed(u16 index);
int mgmt_powered(u16 index, u8 powered);
+int mgmt_discoverable(u16 index, u8 discoverable);
/* HCI info for socket */
#define hci_pi(sk) ((struct hci_pinfo *) sk)
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index 81ef78918b66..434dbcf28b6e 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -68,6 +68,16 @@ struct mgmt_rp_set_powered {
__u8 powered;
} __packed;
+#define MGMT_OP_SET_DISCOVERABLE 0x0006
+struct mgmt_cp_set_discoverable {
+ __le16 index;
+ __u8 discoverable;
+} __packed;
+struct mgmt_rp_set_discoverable {
+ __le16 index;
+ __u8 discoverable;
+} __packed;
+
#define MGMT_EV_CMD_COMPLETE 0x0001
struct mgmt_ev_cmd_complete {
__le16 opcode;
@@ -101,3 +111,9 @@ struct mgmt_ev_powered {
__le16 index;
__u8 powered;
} __packed;
+
+#define MGMT_EV_DISCOVERABLE 0x0007
+struct mgmt_ev_discoverable {
+ __le16 index;
+ __u8 discoverable;
+} __packed;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index d42fb35309b5..f55004af0558 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -278,8 +278,11 @@ static void hci_cc_write_scan_enable(struct hci_dev *hdev, struct sk_buff *skb)
clear_bit(HCI_PSCAN, &hdev->flags);
clear_bit(HCI_ISCAN, &hdev->flags);
- if (param & SCAN_INQUIRY)
+ if (param & SCAN_INQUIRY) {
set_bit(HCI_ISCAN, &hdev->flags);
+ mgmt_discoverable(hdev->id, 1);
+ } else
+ mgmt_discoverable(hdev->id, 0);
if (param & SCAN_PAGE)
set_bit(HCI_PSCAN, &hdev->flags);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index b65b6ca08463..5fa3034fe79f 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -307,6 +307,18 @@ static struct pending_cmd *mgmt_pending_find(u16 opcode, int index)
return NULL;
}
+static void mgmt_pending_remove(u16 opcode, int index)
+{
+ struct pending_cmd *cmd;
+
+ cmd = mgmt_pending_find(opcode, index);
+ if (cmd == NULL)
+ return;
+
+ list_del(&cmd->list);
+ mgmt_pending_free(cmd);
+}
+
static int set_powered(struct sock *sk, unsigned char *data, u16 len)
{
struct mgmt_cp_set_powered *cp;
@@ -353,6 +365,63 @@ failed:
return ret;
}
+static int set_discoverable(struct sock *sk, unsigned char *data, u16 len)
+{
+ struct mgmt_cp_set_discoverable *cp;
+ struct hci_dev *hdev;
+ u16 dev_id;
+ u8 scan;
+ int err;
+
+ cp = (void *) data;
+ dev_id = get_unaligned_le16(&cp->index);
+
+ BT_DBG("request for hci%u", dev_id);
+
+ hdev = hci_dev_get(dev_id);
+ if (!hdev)
+ return cmd_status(sk, MGMT_OP_SET_DISCOVERABLE, ENODEV);
+
+ hci_dev_lock_bh(hdev);
+
+ if (!test_bit(HCI_UP, &hdev->flags)) {
+ err = cmd_status(sk, MGMT_OP_SET_DISCOVERABLE, ENETDOWN);
+ goto failed;
+ }
+
+ if (mgmt_pending_find(MGMT_OP_SET_DISCOVERABLE, dev_id) ||
+ mgmt_pending_find(MGMT_OP_SET_CONNECTABLE, dev_id) ||
+ hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE)) {
+ err = cmd_status(sk, MGMT_OP_SET_DISCOVERABLE, EBUSY);
+ goto failed;
+ }
+
+ if (cp->discoverable == test_bit(HCI_ISCAN, &hdev->flags) &&
+ test_bit(HCI_PSCAN, &hdev->flags)) {
+ err = cmd_status(sk, MGMT_OP_SET_DISCOVERABLE, EALREADY);
+ goto failed;
+ }
+
+ err = mgmt_pending_add(sk, MGMT_OP_SET_DISCOVERABLE, dev_id, data, len);
+ if (err < 0)
+ goto failed;
+
+ scan = SCAN_PAGE;
+
+ if (cp->discoverable)
+ scan |= SCAN_INQUIRY;
+
+ err = hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
+ if (err < 0)
+ mgmt_pending_remove(MGMT_OP_SET_DISCOVERABLE, dev_id);
+
+failed:
+ hci_dev_unlock_bh(hdev);
+ hci_dev_put(hdev);
+
+ return err;
+}
+
int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
{
unsigned char *buf;
@@ -396,6 +465,9 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
case MGMT_OP_SET_POWERED:
err = set_powered(sk, buf + sizeof(*hdr), len);
break;
+ case MGMT_OP_SET_DISCOVERABLE:
+ err = set_discoverable(sk, buf + sizeof(*hdr), len);
+ break;
default:
BT_DBG("Unknown op %u", opcode);
err = cmd_status(sk, opcode, 0x01);
@@ -453,8 +525,8 @@ int mgmt_index_removed(u16 index)
return mgmt_event(MGMT_EV_INDEX_REMOVED, &ev, sizeof(ev), NULL);
}
-struct powered_lookup {
- u8 powered;
+struct cmd_lookup {
+ u8 value;
struct sock *sk;
};
@@ -465,9 +537,9 @@ static void power_rsp(struct pending_cmd *cmd, void *data)
struct mgmt_rp_set_powered *rp;
struct mgmt_cp_set_powered *cp = cmd->cmd;
struct sk_buff *skb;
- struct powered_lookup *match = data;
+ struct cmd_lookup *match = data;
- if (cp->powered != match->powered)
+ if (cp->powered != match->value)
return;
skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + sizeof(*rp), GFP_ATOMIC);
@@ -501,7 +573,7 @@ static void power_rsp(struct pending_cmd *cmd, void *data)
int mgmt_powered(u16 index, u8 powered)
{
struct mgmt_ev_powered ev;
- struct powered_lookup match = { powered, NULL };
+ struct cmd_lookup match = { powered, NULL };
int ret;
put_unaligned_le16(index, &ev.index);
@@ -516,3 +588,63 @@ int mgmt_powered(u16 index, u8 powered)
return ret;
}
+
+static void discoverable_rsp(struct pending_cmd *cmd, void *data)
+{
+ struct mgmt_cp_set_discoverable *cp = cmd->cmd;
+ struct cmd_lookup *match = data;
+ struct sk_buff *skb;
+ struct mgmt_hdr *hdr;
+ struct mgmt_ev_cmd_complete *ev;
+ struct mgmt_rp_set_discoverable *rp;
+
+ if (cp->discoverable != match->value)
+ return;
+
+ skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + sizeof(*rp), GFP_ATOMIC);
+ if (!skb)
+ return;
+
+ hdr = (void *) skb_put(skb, sizeof(*hdr));
+ hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
+ hdr->len = cpu_to_le16(sizeof(*ev) + sizeof(*rp));
+
+ ev = (void *) skb_put(skb, sizeof(*ev));
+ put_unaligned_le16(MGMT_OP_SET_DISCOVERABLE, &ev->opcode);
+
+ rp = (void *) skb_put(skb, sizeof(*rp));
+ put_unaligned_le16(cmd->index, &rp->index);
+ rp->discoverable = cp->discoverable;
+
+ if (sock_queue_rcv_skb(cmd->sk, skb) < 0)
+ kfree_skb(skb);
+
+ list_del(&cmd->list);
+
+ if (match->sk == NULL) {
+ match->sk = cmd->sk;
+ sock_hold(match->sk);
+ }
+
+ mgmt_pending_free(cmd);
+}
+
+int mgmt_discoverable(u16 index, u8 discoverable)
+{
+ struct mgmt_ev_discoverable ev;
+ struct cmd_lookup match = { discoverable, NULL };
+ int ret;
+
+ put_unaligned_le16(index, &ev.index);
+ ev.discoverable = discoverable;
+
+ mgmt_pending_foreach(MGMT_OP_SET_DISCOVERABLE, index,
+ discoverable_rsp, &match);
+
+ ret = mgmt_event(MGMT_EV_DISCOVERABLE, &ev, sizeof(ev), match.sk);
+
+ if (match.sk)
+ sock_put(match.sk);
+
+ return ret;
+}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.