1 #[macro_use]
2 extern crate log;
3 extern crate byteorder;
4 extern crate env_logger;
5 extern crate getopts;
6 extern crate smoltcp;
7
8 mod utils;
9
10 use smoltcp::iface::{Config, Interface, SocketSet};
11 use smoltcp::phy::Device;
12 use smoltcp::phy::{wait as phy_wait, Medium};
13 use smoltcp::socket::dns::{self, GetQueryResultError};
14 use smoltcp::time::Instant;
15 use smoltcp::wire::{DnsQueryType, EthernetAddress, IpAddress, IpCidr, Ipv4Address, Ipv6Address};
16 use std::os::unix::io::AsRawFd;
17
main()18 fn main() {
19 utils::setup_logging("warn");
20
21 let (mut opts, mut free) = utils::create_options();
22 utils::add_tuntap_options(&mut opts, &mut free);
23 utils::add_middleware_options(&mut opts, &mut free);
24 free.push("ADDRESS");
25
26 let mut matches = utils::parse_options(&opts, free);
27 let device = utils::parse_tuntap_options(&mut matches);
28 let fd = device.as_raw_fd();
29 let mut device =
30 utils::parse_middleware_options(&mut matches, device, /*loopback=*/ false);
31 let name = &matches.free[0];
32
33 // Create interface
34 let mut config = Config::new();
35 config.random_seed = rand::random();
36 if device.capabilities().medium == Medium::Ethernet {
37 config.hardware_addr = Some(EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x01]).into());
38 }
39
40 let mut iface = Interface::new(config, &mut device);
41 iface.update_ip_addrs(|ip_addrs| {
42 ip_addrs
43 .push(IpCidr::new(IpAddress::v4(192, 168, 69, 1), 24))
44 .unwrap();
45 ip_addrs
46 .push(IpCidr::new(IpAddress::v6(0xfdaa, 0, 0, 0, 0, 0, 0, 1), 64))
47 .unwrap();
48 ip_addrs
49 .push(IpCidr::new(IpAddress::v6(0xfe80, 0, 0, 0, 0, 0, 0, 1), 64))
50 .unwrap();
51 });
52 iface
53 .routes_mut()
54 .add_default_ipv4_route(Ipv4Address::new(192, 168, 69, 100))
55 .unwrap();
56 iface
57 .routes_mut()
58 .add_default_ipv6_route(Ipv6Address::new(0xfe80, 0, 0, 0, 0, 0, 0, 0x100))
59 .unwrap();
60
61 // Create sockets
62 let servers = &[
63 Ipv4Address::new(8, 8, 4, 4).into(),
64 Ipv4Address::new(8, 8, 8, 8).into(),
65 ];
66 let dns_socket = dns::Socket::new(servers, vec![]);
67
68 let mut sockets = SocketSet::new(vec![]);
69 let dns_handle = sockets.add(dns_socket);
70
71 let socket = sockets.get_mut::<dns::Socket>(dns_handle);
72 let query = socket
73 .start_query(iface.context(), name, DnsQueryType::A)
74 .unwrap();
75
76 loop {
77 let timestamp = Instant::now();
78 debug!("timestamp {:?}", timestamp);
79
80 iface.poll(timestamp, &mut device, &mut sockets);
81
82 match sockets
83 .get_mut::<dns::Socket>(dns_handle)
84 .get_query_result(query)
85 {
86 Ok(addrs) => {
87 println!("Query done: {addrs:?}");
88 break;
89 }
90 Err(GetQueryResultError::Pending) => {} // not done yet
91 Err(e) => panic!("query failed: {e:?}"),
92 }
93
94 phy_wait(fd, iface.poll_delay(timestamp, &sockets)).expect("wait error");
95 }
96 }
97