122 lines
3.3 KiB
Rust
122 lines
3.3 KiB
Rust
#![feature(backtrace)]
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extern crate hptp;
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extern crate tokio;
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#[macro_use]
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extern crate thiserror;
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use hptp::logger::Logger;
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use hptp::msg::{DownMsg, UpMsg};
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use hptp::peer::{self, Peer, UpPeer};
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use std::net::SocketAddr;
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use tokio::io::AsyncRead;
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// use tokio::net::UdpSocket;
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#[derive(Error, Debug)]
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enum Error {
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#[error("io error: {source}")]
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Io {
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#[from]
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source: tokio::io::Error,
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backtrace: std::backtrace::Backtrace,
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},
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#[error("invalid command-line arguments")]
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InvalidArgs,
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}
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fn main() {
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match entry() {
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Err(Error::InvalidArgs) => print_usage(),
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Err(e) => {
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use std::error::Error;
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println!("Error: {:?}", e);
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for bt in e.backtrace() {
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println!("{}", bt);
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}
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}
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Ok(()) => (),
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}
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}
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fn print_usage() {
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print!("Usage:\n./3700send <host-ip>:<host-port>\n")
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}
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fn entry() -> Result<(), Error> {
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let mut rt = tokio::runtime::Runtime::new().unwrap();
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let mut log = Logger::new();
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rt.block_on(start(&mut log))
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}
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async fn start(log: &mut Logger) -> Result<(), Error> {
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let targ_addr = parse_args(std::env::args())?;
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let sock = tokio::net::UdpSocket::bind((std::net::Ipv4Addr::LOCALHOST, 0)).await?;
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log.debug_msg(format!("bound on {}", sock.local_addr()?))
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.await;
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let mut out = tokio::io::stdin();
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let mut peer = Peer::new(sock);
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peer.set_known_target(targ_addr);
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upload(log, &mut peer, &mut out).await
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}
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fn parse_args(mut args: impl Iterator<Item = String>) -> Result<SocketAddr, Error> {
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args.nth(1)
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.ok_or(Error::InvalidArgs)?
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.parse()
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.map_err(|_| Error::InvalidArgs)
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}
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async fn read_segment<IN>(inp: &mut IN) -> Result<Option<Vec<u8>>, Error>
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where
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IN: AsyncRead + Unpin,
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{
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use tokio::io::AsyncReadExt;
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let mut buf = [0u8; hptp::seg::MAX_SEG_SIZE];
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let len = inp.read(&mut buf).await?;
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Ok(if len > 0 {
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Some(buf[..len].into())
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} else {
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None
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})
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}
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async fn send(peer: &mut UpPeer, m: UpMsg) -> Result<(), Error> {
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match peer.send(m).await {
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Ok(()) => Ok(()),
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Err(peer::SendError::Io { source }) => Err(source.into()),
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Err(peer::SendError::NoTarget) => panic!("tried to send w/ no target!"),
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}
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}
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async fn upload<IN>(log: &mut Logger, peer: &mut UpPeer, inp: &mut IN) -> Result<(), Error>
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where
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IN: AsyncRead + Unpin,
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{
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let mut pos = 0;
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let mut next_ack_len: Option<usize> = None;
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loop {
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if let Some(ack_len) = next_ack_len {
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match peer.recv().await {
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Ok(DownMsg::Ack { .. }) => {
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log.recv_ack(pos).await;
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pos += ack_len;
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next_ack_len = None;
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}
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Err(peer::RecvError::InvalidMessage { .. }) => log.recv_corrupt().await,
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Err(peer::RecvError::Io { source }) => return Err(source.into()),
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}
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} else {
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match read_segment(inp).await? {
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Some(data) => {
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next_ack_len = Some(data.len());
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log.send_data(pos, data.len()).await;
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send(peer, UpMsg::Data { payload: data }).await?;
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}
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None => break,
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}
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}
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}
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log.completed().await;
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Ok(())
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}
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