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| use trust_dns_resolver::config::*; | |
| use trust_dns_resolver::Resolver; | |
| // Note you should add the crate to your Cargo.toml file | |
| // trust-dns-resolver = "0.20.1" | |
| fn main() { | |
| // Construct a new Resolver with default configuration options | |
| let resolver = Resolver::new(ResolverConfig::default(), ResolverOpts::default()).unwrap(); | |
| // Lookup the IP addresses associated with a name. | |
| // The final dot forces this to be an FQDN, otherwise the search rules as specified | |
| // in `ResolverOpts` will take effect. FQDN's are generally cheaper queries. | |
| let mx_response = resolver.mx_lookup("gmail.com."); | |
| // There can be many addresses associated with the name, | |
| // this can return IPv4 and/or IPv6 addresses | |
| match mx_response { | |
| Err(_) => println!("No Records"), | |
| Ok(mx_response) => { | |
| let records = mx_response.iter(); | |
| for record in records { | |
| println!("{} {}", record.preference(), record.exchange()); | |
| let lookup_response = resolver.lookup_ip(record.exchange().to_string().as_str()); | |
| match lookup_response { | |
| Err(_) => println!("This exchange host has no address."), | |
| Ok(lookup_response) => { | |
| let ip_addrs = lookup_response.iter(); | |
| for ip_addr in ip_addrs { | |
| if ip_addr.is_ipv4() { | |
| println!(" ip4: {}", ip_addr) | |
| } else { | |
| println!(" ip6: {}", ip_addr) | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } |