doh-proxy 0.9.15

A DNS-over-HTTPS (DoH) and ODoH (Oblivious DoH) proxy
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// functions to verify the startup arguments as correct

use std::net::{SocketAddr, ToSocketAddrs};

pub(crate) fn verify_sock_addr(arg_val: &str) -> Result<String, String> {
    match arg_val.parse::<SocketAddr>() {
        Ok(_addr) => Ok(arg_val.to_string()),
        Err(_) => Err(format!(
            "Could not parse \"{arg_val}\" as a valid socket address (with port)."
        )),
    }
}

pub(crate) fn verify_remote_server(arg_val: &str) -> Result<String, String> {
    match arg_val.to_socket_addrs() {
        Ok(mut addr_iter) => match addr_iter.next() {
            Some(_) => Ok(arg_val.to_string()),
            None => Err(format!(
                "Could not parse \"{arg_val}\" as a valid remote uri"
            )),
        },
        Err(err) => Err(format!("{err}")),
    }
}