Function rshijack::net::sniff

pub fn sniff<F, T>(
    interface: &str, 
    log_level: Level, 
    src: &SocketAddr, 
    dst: &SocketAddr, 
    callback: F
) -> Result<T> where
    F: FnMut(IpHeader, TcpHeader, &[u8]) -> Result<Option<T>>,