1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
12 use io::{Error, Read, self};
14 use net::{Ipv4Addr, SocketAddr, SocketAddrV4};
16 use string::{String, ToString};
17 use sys::syscall::EINVAL;
18 use time::{self, Duration};
19 use vec::{IntoIter, Vec};
20 use convert::{TryFrom, TryInto};
22 use self::dns::{Dns, DnsQuery};
24 pub use self::tcp::{TcpStream, TcpListener};
25 pub use self::udp::UdpSocket;
33 pub struct LookupHost(IntoIter<SocketAddr>, u16);
36 pub fn port(&self) -> u16 {
41 impl Iterator for LookupHost {
42 type Item = SocketAddr;
43 fn next(&mut self) -> Option<Self::Item> {
48 impl<'a> TryFrom<&'a str> for LookupHost {
49 type Error = io::Error;
51 fn try_from(s: &str) -> io::Result<LookupHost> {
52 macro_rules! try_opt {
53 ($e:expr, $msg:expr) => (
56 None => return Err(io::Error::new(io::ErrorKind::InvalidInput,
62 // split the string by ':' and convert the second part to u16
63 let mut parts_iter = s.rsplitn(2, ':');
64 let port_str = try_opt!(parts_iter.next(), "invalid socket address");
65 let host = try_opt!(parts_iter.next(), "invalid socket address");
66 let port: u16 = try_opt!(port_str.parse().ok(), "invalid port value");
68 (host, port).try_into()
72 impl<'a> TryFrom<(&'a str, u16)> for LookupHost {
73 type Error = io::Error;
75 fn try_from((host, port): (&'a str, u16)) -> io::Result<LookupHost> {
76 let mut ip_string = String::new();
77 File::open("/etc/net/ip")?.read_to_string(&mut ip_string)?;
78 let ip: Vec<u8> = ip_string.trim().split('.').map(|part| part.parse::<u8>()
79 .unwrap_or(0)).collect();
81 let mut dns_string = String::new();
82 File::open("/etc/net/dns")?.read_to_string(&mut dns_string)?;
83 let dns: Vec<u8> = dns_string.trim().split('.').map(|part| part.parse::<u8>()
84 .unwrap_or(0)).collect();
86 if ip.len() == 4 && dns.len() == 4 {
87 let time = time::SystemTime::now().duration_since(time::UNIX_EPOCH).unwrap();
88 let tid = (time.subsec_nanos() >> 16) as u16;
93 queries: vec![DnsQuery {
94 name: host.to_string(),
101 let packet_data = packet.compile();
103 let my_ip = Ipv4Addr::new(ip[0], ip[1], ip[2], ip[3]);
104 let dns_ip = Ipv4Addr::new(dns[0], dns[1], dns[2], dns[3]);
105 let socket = UdpSocket::bind(Ok(&SocketAddr::V4(SocketAddrV4::new(my_ip, 0))))?;
106 socket.set_read_timeout(Some(Duration::new(5, 0)))?;
107 socket.set_write_timeout(Some(Duration::new(5, 0)))?;
108 socket.connect(Ok(&SocketAddr::V4(SocketAddrV4::new(dns_ip, 53))))?;
109 socket.send(&packet_data)?;
111 let mut buf = [0; 65536];
112 let count = socket.recv(&mut buf)?;
114 match Dns::parse(&buf[.. count]) {
116 let mut addrs = vec![];
117 for answer in response.answers.iter() {
118 if answer.a_type == 0x0001 && answer.a_class == 0x0001
119 && answer.data.len() == 4
121 let answer_ip = Ipv4Addr::new(answer.data[0],
125 addrs.push(SocketAddr::V4(SocketAddrV4::new(answer_ip, 0)));
128 Ok(LookupHost(addrs.into_iter(), port))
130 Err(_err) => Err(Error::from_raw_os_error(EINVAL))
133 Err(Error::from_raw_os_error(EINVAL))
138 fn path_to_peer_addr(path_str: &str) -> SocketAddr {
139 let mut parts = path_str.split('/').next().unwrap_or("").split(':').skip(1);
140 let host = Ipv4Addr::from_str(parts.next().unwrap_or("")).unwrap_or(Ipv4Addr::new(0, 0, 0, 0));
141 let port = parts.next().unwrap_or("").parse::<u16>().unwrap_or(0);
142 SocketAddr::V4(SocketAddrV4::new(host, port))
145 fn path_to_local_addr(path_str: &str) -> SocketAddr {
146 let mut parts = path_str.split('/').nth(1).unwrap_or("").split(':');
147 let host = Ipv4Addr::from_str(parts.next().unwrap_or("")).unwrap_or(Ipv4Addr::new(0, 0, 0, 0));
148 let port = parts.next().unwrap_or("").parse::<u16>().unwrap_or(0);
149 SocketAddr::V4(SocketAddrV4::new(host, port))