Bluetooth: audio: Accept empty CCID list in audio metadata

The CCID list can be empty, as the Assigned Numbers is not strict
regarding it's minimum length.

Fixes: #59666
Signed-off-by: Mariusz Skamra <[email protected]>

Author: MariuszSkamra

samples/bluetooth/hap_ha/src/bap_unicast_sr.c

@@ -297,12 +297,7 @@ static bool valid_metadata_type(uint8_t type, uint8_t len)
 		}
 
 		return true;
-	case BT_AUDIO_METADATA_TYPE_CCID_LIST: /* 2 - 254 octets */
-		if (len < 2) {
-			return false;
-		}
-
-		return true;
+	case BT_AUDIO_METADATA_TYPE_CCID_LIST:
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO: /* 0 - 255 octets */
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO_URI: /* 0 - 255 octets */
 		return true;

samples/bluetooth/tmap_peripheral/src/bap_unicast_sr.c

@@ -246,12 +246,7 @@ static bool valid_metadata_type(uint8_t type, uint8_t len)
 		}
 
 		return true;
-	case BT_AUDIO_METADATA_TYPE_CCID_LIST: /* 2 - 254 octets */
-		if (len < 2) {
-			return false;
-		}
-
-		return true;
+	case BT_AUDIO_METADATA_TYPE_CCID_LIST:
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO: /* 0 - 255 octets */
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO_URI: /* 0 - 255 octets */
 		return true;

samples/bluetooth/unicast_audio_server/src/main.c

@@ -438,12 +438,7 @@ static bool valid_metadata_type(uint8_t type, uint8_t len)
 		}
 
 		return true;
-	case BT_AUDIO_METADATA_TYPE_CCID_LIST: /* 2 - 254 octets */
-		if (len < 2) {
-			return false;
-		}
-
-		return true;
+	case BT_AUDIO_METADATA_TYPE_CCID_LIST:
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO: /* 0 - 255 octets */
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO_URI: /* 0 - 255 octets */
 		return true;

subsys/bluetooth/audio/shell/bap.c

@@ -518,12 +518,7 @@ static bool valid_metadata_type(uint8_t type, uint8_t len)
 		}
 
 		return true;
-	case BT_AUDIO_METADATA_TYPE_CCID_LIST: /* 2 - 254 octets */
-		if (len < 2) {
-			return false;
-		}
-
-		return true;
+	case BT_AUDIO_METADATA_TYPE_CCID_LIST:
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO: /* 0 - 255 octets */
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO_URI: /* 0 - 255 octets */
 		return true;

tests/bluetooth/tester/src/btp_bap.c

@@ -360,12 +360,7 @@ static bool valid_metadata_type(uint8_t type, uint8_t len, const uint8_t *data)
 		}
 
 		return true;
-	case BT_AUDIO_METADATA_TYPE_CCID_LIST: /* 2 - 254 octets */
-		if (len < 2) {
-			return false;
-		}
-
-		return true;
+	case BT_AUDIO_METADATA_TYPE_CCID_LIST:
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO: /* 0 - 255 octets */
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO_URI: /* 0 - 255 octets */
 		return true;

tests/bsim/bluetooth/audio/src/bap_unicast_server_test.c

@@ -189,12 +189,7 @@ static bool valid_metadata_type(uint8_t type, uint8_t len)
 		}
 
 		return true;
-	case BT_AUDIO_METADATA_TYPE_CCID_LIST: /* 2 - 254 octets */
-		if (len < 2) {
-			return false;
-		}
-
-		return true;
+	case BT_AUDIO_METADATA_TYPE_CCID_LIST:
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO:     /* 0 - 255 octets */
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO_URI: /* 0 - 255 octets */
 		return true;

tests/bsim/bluetooth/audio/src/cap_acceptor_test.c

@@ -354,12 +354,7 @@ static bool valid_metadata_type(uint8_t type, uint8_t len)
 		}
 
 		return true;
-	case BT_AUDIO_METADATA_TYPE_CCID_LIST: /* 2 - 254 octets */
-		if (len < 2) {
-			return false;
-		}
-
-		return true;
+	case BT_AUDIO_METADATA_TYPE_CCID_LIST:
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO: /* 0 - 255 octets */
 	case BT_AUDIO_METADATA_TYPE_PROGRAM_INFO_URI: /* 0 - 255 octets */
 		return true;