samotop-core 0.13.1+smtp

The domain model of Samotop and core functionality - SMTP server and library built on async-std. A base crate for samotop extensions.
Documentation 
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use crate::common::*;
use std::net::{Ipv4Addr, Ipv6Addr};

#[derive(Eq, PartialEq, Debug, Clone)]
pub enum SmtpHost {
    Domain(String),
    Ipv4(Ipv4Addr),
    Ipv6(Ipv6Addr),
    Invalid { label: String, literal: String },
    Other { label: String, literal: String },
}

impl SmtpHost {
    pub fn domain(&self) -> String {
        match self {
            SmtpHost::Domain(s) => s.clone(),
            SmtpHost::Ipv4(ip) => format!("{}", ip),
            SmtpHost::Ipv6(ip) => format!("{}", ip),
            SmtpHost::Invalid { label, literal } => format!("{}:{}", label, literal),
            SmtpHost::Other { label, literal } => format!("{}:{}", label, literal),
        }
    }
}

impl fmt::Display for SmtpHost {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        use self::SmtpHost::*;
        match *self {
            Domain(ref h) => f.write_str(h),
            Ipv4(ref h) => write!(f, "[{}]", h),
            Ipv6(ref h) => write!(f, "[IPv6:{}]", h),
            Invalid {
                ref label,
                ref literal,
            } => write!(f, "[{}:{}]", label, literal),
            Other {
                ref label,
                ref literal,
            } => write!(f, "[{}:{}]", label, literal),
        }
    }
}