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� � � Z * ) � � e 4 � � � ] ; $ � � g 0 � � � ] > � � � l ? � � a 0 � � o C ) � � � � cons _ => (), }, } return Ok(hop); }; rtt: SteadyTime::now() - start_time, host: sender, ttl: self.ttl, let hop = TraceHop { if ip_payload[4..8] == ping[4..8] { } return Err(Error::new(ErrorKind::TimedOut, "too many hops")); self.done = true; if self.ttl == 255 { Some(IcmpMessage::TimeExceeded(_, ip_payload)) => { } } return Ok(hop); self.done = true; }; rtt: SteadyTime::now() - start_time, host: sender, ttl: self.ttl, let hop = TraceHop { if header.data == ping[4..8] { Some(IcmpMessage::EchoReply(header, _)) => { match IcmpMessage::from_buf(&data) { let data = try!(ip_payload(&data)); } }, data = d; sender = s; Ok((s, d)) => { Err(_) => panic!("Unexpected error"), Err(ref err) if err.kind() == ErrorKind::WouldBlock=> continue, match socket.recvfrom(4096, 0) { let (sender, data); while SteadyTime::now() < start_time + Duration::seconds(1) { // After deadline passes, restart the loop to advance the TTL and resend. let start_time = SteadyTime::now(); assert_eq!(wr}} } } }}} } }) timeout: timeout, done: false, seq_num: 0, ident: rand::random(), ttl: 0, addr: addr, Some(addr) => Ok(TraceResult { None => Err(Error::new(ErrorKind::InvalidInput, "Could not interpret address")), match addr_iter.next() { let mut addr_iter = try!(address.to_socket_addrs()); }; _ => (), Some(0) => return Err(Error::new(ErrorKind::InvalidInput, "Timeout too small")), None => return Err(Error::new(ErrorKind::InvalidInput, "Timeout too large")), match timeout.num_microseconds() { pub fn execute_with_timeout<T: ToSocketAddrs>(address: T, timeout: Duration) -> io::Result<TraceResult> { /// Performs a traceroute, waiting at each request for around until timeout elapses before failing } execute_with_timeout(address, Duration::seconds(1)) pub fn execute<T: ToSocketAddrs>(address: T) -> io::Result<TraceResult> { /// Performs a traceroute, waiting at each request for around one second before failing } pub rtt: Duration, pub host: SocketAddr, pub ttl: u8, pub struct TraceHop { #[derive(Debug)] } timeout: Duration, done: bool, seq_num: u16, ident: u16, ttl: u8, addr: SocketAddr, pub struct TraceResult { const IPPROTO_ICMP: i32 = 1; use time::{Duration, SteadyTime}; use socket::{AF_INET, IP_TTL, IPPROTO_IP, SOCK_RAW, SOL_SOCKET, Socket}; use libc::{SO_RCVTIMEO, timeval}; use std::net::{SocketAddr, ToSocketAddrs}; use std::io::{self, Error, ErrorKind}; use std::iter::Iterator; extern crate time; extern crate socket; extern crate rand; extern crate libc; ad > H � � � � h O E D � � � � � � � r ) �
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� � y H � � � Y - � � � Z � � y J � � � r [ > . � � � _ => (), _ => (), _ => (), }, _ => (), }, } return Ok(hop); }; rtt: SteadyTime::now() - start_time, host: sender, ttl: self.ttl, let hop = TraceHop { if ip_payload[4..8] == ping[4..8] { } return Err(Error::new(ErrorKind::TimedOut, "too many hops")); self.done = true; if self.ttl == 255 { Some(IcmpMessage::TimeExceeded(_, ip_payload)) => { } } return Ok(hop); self.done = true; }; rtt: SteadyTime::now() - start_time, host: sender, ttl: self.ttl, let hop = TraceHop { if header.data == ping[4..8] { Some(IcmpMessage::EchoReply(header, _)) => { match IcmpMessage::from_buf(&data) { let data = try!(ip_payload(&data)); } }, data = d; sender = s; Ok((s, d)) => { Err(e) => return Err(e), Err(ref err) if err.kind() == ErrorKind::WouldBlock => continue, match socket.recvfrom(4096, 0) { let (sender, data); while SteadyTime::now() < start_time + self.timeout { // After deadline passes, restart the loop to advance the TTL and resend. let start_time = SteadyTime::now(); assert_eq!(wrote, ping.len()); let wrote = try!(socket.sendto(&ping, 0, &self.addr)); try!(socket.setsockopt(SOL_SOCKET, SO_RCVTIMEO, compute_timeout(self.timeout))); try!(socket.setsockopt(IPPROTO_IP, IP_TTL, self.ttl)); self.ttl += 1; self.seq_num += 1; let ping = construct_ping(self.ident, self.seq_num); loop { let socket = try!(Socket::new(AF_INET, SOCK_RAW, IPPROTO_ICMP)); fn find_next_hop(&mut self) -> io::Result<TraceHop> { impl TraceResult { } } Some(res) } self.done = true; if res.is_err() { let res = self.find_next_hop(); } return None; if self.done { fn next(&mut self) -> Option<io::Result<TraceHop>> { type Item = io::Result<TraceHop>; impl Iterator for TraceResult { ad � � o � � � � � � � h Q : 9 ! � � � � � \ V Q A �
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� � p A 6 0 . - � � � � � � � i N 5 + � � � � � Z B 7 1 / . � � | b � � k e N L K � � � � � � } } } }} } tv_usec: usecs % 1000000 tv_sec: usecs / 1000000, timeval{ let usecs = timeout.num_microseconds().unwrap(); fn compute_timeout(timeout: Duration) -> timeval { } Ok(&packet[len..]) } return Err(Error::new(ErrorKind::InvalidData, "Packet too short")); if len < 20 || packet.len() < len { let len = ((packet[0] & 0x0f) * 4) as usize; } return Err(Error::new(ErrorKind::InvalidData, "Packet too short")); if packet.len() < 1 { fn ip_payload(packet: &[u8]) -> io::Result<&[u8]> { /// and returns the IP payload part of the packet /// Takes a buffer containing a prefix of an IP packet (with a full header) } } }) data: data, checksum: ((buf[2] as u16) << 8) + (buf[3] as u16), code: buf[1], msg_type: buf[0], Some(IcmpHeader { let data: [u8; 4] = [buf[4], buf[5], buf[6], buf[7]]; } return None; if buf.len() < 8 { fn from_buf(buf: &[u8]) -> Option<IcmpHeader> { impl IcmpHeader { } pub data: [u8; 4], pub checksum: u16, pub code: u8, pub msg_type: u8, struct IcmpHeader { #[derive(Debug)] } } }) _ => IcmpMessage::Unknown(header), }, } Err(..) => return None, Ok(body) => IcmpMessage::TimeExceeded(header, body), match ip_payload(payload) { 11 => { 0 => IcmpMessage::EchoReply(header, payload), Some(match header.msg_type { let payload = &buf[ICMP_HEADER_LEN..]; let header = header.unwrap(); } return None; if header.is_none() { let header = IcmpHeader::from_buf(buf); // TODO: Check checksum fn from_buf(buf: &'a [u8]) -> Option<IcmpMessage<'a>> { impl<'a> IcmpMessage<'a> { } Unknown(IcmpHeader), TimeExceeded(IcmpHeader, &'a [u8]), EchoReply(IcmpHeader, &'a [u8]), enum IcmpMessage<'a> { const ICMP_HEADER_LEN: usize = 8; } ping fill_checksum(&mut ping); (seq_num >> 8) as u8, (seq_num & 0xff) as u8]; (ident >> 8) as u8, (ident & 0xff) as u8, 0u8, 0u8, 8u8, 0u8, let mut ping: Vec<u8> = vec![ fn construct_ping(ident: u16, seq_num: u16) -> Vec<u8> { /// Constructs an ICMP ping IP payload with the given identifier and sequence number } ip_payload[3] = (sum & 0xff) as u8; ip_payload[2] = (sum >> 8) as u8; sum = !sum; } sum = sum.wrapping_add(part); } part += word[1] as u16; if word.len() > 1 { let mut part = (word[0] as u16) << 8; for word in ip_payload.chunks(2) { let mut sum = 0u16; ip_payload[3] = 0; ip_payload[2] = 0; fn fill_checksum(ip_payload: &mut [u8]) { /// Computes and populates the checksum of an ICMP message } } } } }