Function coap_numbers::option::get_criticality

source · 
pub fn get_criticality(option: u16) -> Criticality
Expand description

Extract the option’s critical/elective bit

assert_eq!(get_criticality(OBSERVE), Criticality::Elective);
assert_eq!(get_criticality(URI_HOST), Criticality::Critical);
Examples found in repository?
examples/options.rs (line 20)
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fn main() -> Result<(), std::num::ParseIntError> {
    let mut options = std::env::args();
    let _progname = options.next();
    let options: Vec<u16> = options.map(|a| a.parse()).collect::<Result<_, _>>()?;
    println!("Processing option numbers {:?}", options);

    let mut path = "".to_string();

    use coap_numbers::option;

    for o in options {
        match (o, option::get_criticality(o)) {
            (option::URI_HOST, _) => {
                /* Ignoring: We don't do virtual hosting here */
            }
            (option::URI_PATH, _) => {
                path.push_str("/something");
            }
            (option::ETAG, _) => {
                println!("ETag was set, I might not even need to respond in the end");
            }
            (o, option::Criticality::Elective) => {
                println!("Elective option {} seen -- logging it because we might want to add support for it, but proceeding anyway", o);
            }
            (o, option::Criticality::Critical) => {
                panic!("Encountered a critical option {}, erring out with BAD_OPTION", o);
            }
        }
    }

    println!("Message processed, request was for {}", path);

    Ok(())
}