const crypto/tls.recordTypeAlert

5 uses

	crypto/tls (current package)
		common.go#L81: 	recordTypeAlert            recordType = 21
		conn.go#L668: 		if (typ != recordTypeAlert && typ != recordTypeHandshake) || vers >= 0x1000 {
		conn.go#L713: 	case recordTypeAlert:
		conn.go#L854: 	_, writeErr := c.writeRecordLocked(recordTypeAlert, c.tmp[0:2])
		conn.go#L1412: 		recordType(c.rawInput.Bytes()[0]) == recordTypeAlert {