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Bluetooth: Add eir_len parameter to mgmt_ev_device_found

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This patch add a two byte eir_len parameter mgmt_ev_device_found. Since
it's unlikely that the data will in the short term be much bigger than
conventional EIR lengths just use a small stack based buffer for now to
avoid dynamic memory allocation & freeing.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2012-01-15 19:51:59 +02:00
parent afc747a600
commit e319d2e743
3 changed files with 18 additions and 15 deletions
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2
include/net/bluetooth/hci_core.h
View File

@ -925,7 +925,7 @@ int mgmt_read_local_oob_data_reply_complete(struct hci_dev *hdev, u8 *hash,
u8 *randomizer, u8 status);
int mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
u8 addr_type, u8 *dev_class, s8 rssi,
u8 cfm_name, u8 *eir, u8 eir_len);
u8 cfm_name, u8 *eir, u16 eir_len);
int mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *name);
int mgmt_start_discovery_failed(struct hci_dev *hdev, u8 status);
int mgmt_stop_discovery_failed(struct hci_dev *hdev, u8 status);

3
include/net/bluetooth/mgmt.h
View File

@ -368,7 +368,8 @@ struct mgmt_ev_device_found {
__u8 dev_class[3];
__s8 rssi;
__u8 confirm_name;
__u8 eir[HCI_MAX_EIR_LENGTH];
__le16 eir_len;
__u8 eir[0];
} __packed;
#define MGMT_EV_REMOTE_NAME 0x0012

28
net/bluetooth/mgmt.c
View File

@ -2782,27 +2782,29 @@ int mgmt_read_local_oob_data_reply_complete(struct hci_dev *hdev, u8 *hash,
int mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
u8 addr_type, u8 *dev_class, s8 rssi,
u8 cfm_name, u8 *eir, u8 eir_len)
u8 cfm_name, u8 *eir, u16 eir_len)
{
struct mgmt_ev_device_found ev;
char buf[512];
struct mgmt_ev_device_found *ev = (void *) buf;
size_t ev_size = sizeof(*ev) + eir_len;
if (eir_len > sizeof(ev.eir))
if (ev_size > sizeof(buf))
return -EINVAL;
memset(&ev, 0, sizeof(ev));
bacpy(&ev->addr.bdaddr, bdaddr);
ev->addr.type = link_to_mgmt(link_type, addr_type);
ev->rssi = rssi;
ev->confirm_name = cfm_name;
bacpy(&ev.addr.bdaddr, bdaddr);
ev.addr.type = link_to_mgmt(link_type, addr_type);
ev.rssi = rssi;
ev.confirm_name = cfm_name;
if (eir)
memcpy(ev.eir, eir, eir_len);
if (eir_len > 0) {
put_unaligned_le16(eir_len, &ev->eir_len);
memcpy(ev->eir, eir, eir_len);
}
if (dev_class)
memcpy(ev.dev_class, dev_class, sizeof(ev.dev_class));
memcpy(ev->dev_class, dev_class, sizeof(ev->dev_class));
return mgmt_event(MGMT_EV_DEVICE_FOUND, hdev, &ev, sizeof(ev), NULL);
return mgmt_event(MGMT_EV_DEVICE_FOUND, hdev, ev, ev_size, NULL);
}
int mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *name)