From: Johan Hedberg <johan.hedberg@intel.com>
Date: Sun, 15 Jan 2012 17:51:59 +0000 (+0200)
Subject: Bluetooth: Add eir_len parameter to mgmt_ev_device_found
X-Git-Tag: v3.4-rc1~177^2~112^2~221
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e319d2e74378660c5e09a1b8703663ba97f0f62a;p=karo-tx-linux.git

Bluetooth: Add eir_len parameter to mgmt_ev_device_found

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>
---

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index f3fbfd6f6c3b..33dff8ef2e08 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -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);
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index d1d13dc0cca8..4f166c834ddb 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -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
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index c8042c6e2b46..b7e7fdfaee38 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -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)