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