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use ::std::collections::HashMap;
use ::std::fmt;
use ::std::net::{IpAddr, Ipv4Addr};
use ::std::net::SocketAddr;
#[derive(PartialEq, Hash, Eq, Clone, PartialOrd, Ord, Debug, Copy)]
pub enum Protocol {
Tcp,
Udp,
}
impl Protocol {
// Currently, linux implementation doesn't use this function.
// Without this #[cfg] clippy complains about dead code, and CI refuses
// to pass.
#[cfg(target_os = "macos")]
pub fn from_str(string: &str) -> Option<Self> {
match string {
"TCP" => Some(Protocol::Tcp),
"UDP" => Some(Protocol::Udp),
_ => None,
}
}
}
impl fmt::Display for Protocol {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Protocol::Tcp => write!(f, "tcp"),
Protocol::Udp => write!(f, "udp"),
}
}
}
#[derive(Clone, Ord, PartialOrd, PartialEq, Eq, Hash, Debug, Copy)]
pub struct Socket {
pub ip: Ipv4Addr,
pub port: u16,
}
#[derive(PartialEq, Hash, Eq, Clone, PartialOrd, Ord, Debug, Copy)]
pub struct LocalSocket {
pub ip: IpAddr,
pub port: u16,
pub protocol: Protocol,
}
#[derive(PartialEq, Hash, Eq, Clone, PartialOrd, Ord, Debug, Copy)]
pub struct Connection {
pub remote_socket: Socket,
pub local_socket: LocalSocket,
}
pub fn display_ip_or_host(ip: Ipv4Addr, ip_to_host: &HashMap<Ipv4Addr, String>) -> String {
match ip_to_host.get(&ip) {
Some(host) => host.clone(),
None => ip.to_string(),
}
}
pub fn display_connection_string(
connection: &Connection,
ip_to_host: &HashMap<Ipv4Addr, String>,
interface_name: &str,
) -> String {
format!(
"<{}>:{} => {}:{} ({})",
interface_name,
connection.local_socket.port,
display_ip_or_host(connection.remote_socket.ip, ip_to_host),
connection.remote_socket.port,
connection.local_socket.protocol,
)
}
impl Connection {
pub fn new(
remote_socket: SocketAddr,
local_ip: IpAddr,
local_port: u16,
protocol: Protocol,
) -> Option<Self> {
match remote_socket {
SocketAddr::V4(remote_socket) => Some(Connection {
remote_socket: Socket {
ip: *remote_socket.ip(),
port: remote_socket.port(),
},
local_socket: LocalSocket {
ip: local_ip,
port: local_port,
protocol,
},
}),
_ => None,
}
}
}
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