[PATCH v3 1/1] Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SERVICE_UUID

[Claudia Draghicescu <claudia.rosu@xxxxxxx>]

Copy the content of a Periodic Advertisement Report to BASE only if
the service UUID is Basic Audio Announcement Service UUID.

Signed-off-by: Claudia Draghicescu <claudia.rosu@xxxxxxx>
---
 net/bluetooth/iso.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c
index 2132a16be93c..4f23b3a35faf 100644
--- a/net/bluetooth/iso.c
+++ b/net/bluetooth/iso.c
@@ -14,6 +14,7 @@
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
 #include <net/bluetooth/iso.h>
+#include "eir.h"

 static const struct proto_ops iso_sock_ops;

@@ -47,6 +48,7 @@ static void iso_sock_kill(struct sock *sk);

 #define EIR_SERVICE_DATA_LENGTH 4
 #define BASE_MAX_LENGTH (HCI_MAX_PER_AD_LENGTH - EIR_SERVICE_DATA_LENGTH)
+#define EIR_BAA_SERVICE_UUID	0x1851

 /* iso_pinfo flags values */
 enum {
@@ -1461,6 +1463,8 @@ static int iso_sock_getsockopt(struct socket *sock, int level, int optname,
 		len = min_t(unsigned int, len, base_len);
 		if (copy_to_user(optval, base, len))
 			err = -EFAULT;
+		if (put_user(len, optlen))
+			err = -EFAULT;

 		break;

@@ -1783,12 +1787,18 @@ int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)

 	ev3 = hci_recv_event_data(hdev, HCI_EV_LE_PER_ADV_REPORT);
 	if (ev3) {
+		size_t base_len = ev3->length;
+		u8 *base;
+
 		sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr,
 					 iso_match_sync_handle_pa_report, ev3);
-
-		if (sk) {
-			memcpy(iso_pi(sk)->base, ev3->data, ev3->length);
-			iso_pi(sk)->base_len = ev3->length;
+		base = eir_get_service_data(ev3->data, ev3->length,
+					    EIR_BAA_SERVICE_UUID, &base_len);
+		if (base) {
+			if (sk) {
+				memcpy(iso_pi(sk)->base, base, base_len);
+				iso_pi(sk)->base_len = base_len;
+			}
 		}
 	} else {
 		sk = iso_get_sock_listen(&hdev->bdaddr, BDADDR_ANY, NULL, NULL);
--
2.34.1