108 lines
4.2 KiB
Rust
108 lines
4.2 KiB
Rust
mod utils;
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use std::str::{self, FromStr};
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use std::collections::BTreeMap;
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use std::os::unix::io::AsRawFd;
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use url::Url;
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use log::debug;
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use smoltcp::phy::wait as phy_wait;
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use smoltcp::wire::{EthernetAddress, Ipv4Address, Ipv6Address, IpAddress, IpCidr};
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use smoltcp::iface::{NeighborCache, EthernetInterfaceBuilder, Routes};
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use smoltcp::socket::{SocketSet, TcpSocket, TcpSocketBuffer};
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use smoltcp::time::Instant;
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fn main() {
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utils::setup_logging("");
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let (mut opts, mut free) = utils::create_options();
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utils::add_tap_options(&mut opts, &mut free);
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utils::add_middleware_options(&mut opts, &mut free);
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free.push("ADDRESS");
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free.push("URL");
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let mut matches = utils::parse_options(&opts, free);
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let device = utils::parse_tap_options(&mut matches);
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let fd = device.as_raw_fd();
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let device = utils::parse_middleware_options(&mut matches, device, /*loopback=*/false);
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let address = IpAddress::from_str(&matches.free[0]).expect("invalid address format");
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let url = Url::parse(&matches.free[1]).expect("invalid url format");
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let neighbor_cache = NeighborCache::new(BTreeMap::new());
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let tcp_rx_buffer = TcpSocketBuffer::new(vec![0; 1024]);
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let tcp_tx_buffer = TcpSocketBuffer::new(vec![0; 1024]);
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let tcp_socket = TcpSocket::new(tcp_rx_buffer, tcp_tx_buffer);
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let ethernet_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x02]);
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let ip_addrs = [IpCidr::new(IpAddress::v4(192, 168, 69, 1), 24),
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IpCidr::new(IpAddress::v6(0xfdaa, 0, 0, 0, 0, 0, 0, 1), 64),
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IpCidr::new(IpAddress::v6(0xfe80, 0, 0, 0, 0, 0, 0, 1), 64)];
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let default_v4_gw = Ipv4Address::new(192, 168, 69, 100);
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let default_v6_gw = Ipv6Address::new(0xfe80, 0, 0, 0, 0, 0, 0, 0x100);
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let mut routes_storage = [None; 2];
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let mut routes = Routes::new(&mut routes_storage[..]);
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routes.add_default_ipv4_route(default_v4_gw).unwrap();
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routes.add_default_ipv6_route(default_v6_gw).unwrap();
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let mut iface = EthernetInterfaceBuilder::new(device)
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.ethernet_addr(ethernet_addr)
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.neighbor_cache(neighbor_cache)
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.ip_addrs(ip_addrs)
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.routes(routes)
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.finalize();
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let mut sockets = SocketSet::new(vec![]);
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let tcp_handle = sockets.add(tcp_socket);
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enum State { Connect, Request, Response };
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let mut state = State::Connect;
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loop {
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let timestamp = Instant::now();
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match iface.poll(&mut sockets, timestamp) {
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Ok(_) => {},
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Err(e) => {
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debug!("poll error: {}",e);
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}
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}
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{
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let mut socket = sockets.get::<TcpSocket>(tcp_handle);
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state = match state {
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State::Connect if !socket.is_active() => {
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debug!("connecting");
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let local_port = 49152 + rand::random::<u16>() % 16384;
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socket.connect((address, url.port().unwrap_or(80)), local_port).unwrap();
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State::Request
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}
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State::Request if socket.may_send() => {
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debug!("sending request");
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let http_get = "GET ".to_owned() + url.path() + " HTTP/1.1\r\n";
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socket.send_slice(http_get.as_ref()).expect("cannot send");
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let http_host = "Host: ".to_owned() + url.host_str().unwrap() + "\r\n";
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socket.send_slice(http_host.as_ref()).expect("cannot send");
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socket.send_slice(b"Connection: close\r\n").expect("cannot send");
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socket.send_slice(b"\r\n").expect("cannot send");
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State::Response
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}
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State::Response if socket.can_recv() => {
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socket.recv(|data| {
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println!("{}", str::from_utf8(data).unwrap_or("(invalid utf8)"));
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(data.len(), ())
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}).unwrap();
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State::Response
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}
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State::Response if !socket.may_recv() => {
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debug!("received complete response");
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break
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}
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_ => state
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}
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}
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phy_wait(fd, iface.poll_delay(&sockets, timestamp)).expect("wait error");
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}
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}
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