63 lines
2.6 KiB
Rust
63 lines
2.6 KiB
Rust
use crate::{
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common::{first_bytes_match, outgoing::OutgoingConfig, shuffle_rd_wr_filter_only, stream_preamble},
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context::Context,
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in_out::{StanzaRead, StanzaWrite},
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slicesubsequence::SliceSubsequence,
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srv::srv_connect,
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stanzafilter::StanzaFilter,
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};
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use anyhow::Result;
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use log::{error, info};
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use tokio::{net::TcpListener, task::JoinHandle};
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async fn handle_outgoing_connection(stream: tokio::net::TcpStream, client_addr: &mut Context<'_>, config: OutgoingConfig) -> Result<()> {
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info!("{} connected", client_addr.log_from());
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let mut in_filter = StanzaFilter::new(config.max_stanza_size_bytes);
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#[cfg(feature = "websocket")]
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let (mut in_rd, mut in_wr) = if first_bytes_match(&stream, &mut in_filter.buf[0..3], |p| p == b"GET").await? {
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crate::websocket::incoming_websocket_connection(Box::new(stream), config.max_stanza_size_bytes).await?
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} else {
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let (in_rd, in_wr) = tokio::io::split(stream);
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(StanzaRead::new(in_rd), StanzaWrite::new(in_wr))
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};
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#[cfg(not(feature = "websocket"))]
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let (mut in_rd, mut in_wr) = {
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let (in_rd, in_wr) = tokio::io::split(stream);
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(StanzaRead::new(in_rd), StanzaWrite::new(in_wr))
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};
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// now read to figure out client vs server
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let (stream_open, is_c2s) = stream_preamble(&mut in_rd, &mut in_wr, client_addr.log_to(), &mut in_filter).await?;
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client_addr.set_c2s_stream_open(is_c2s, &stream_open);
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// we require a valid to= here or we fail
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let to = std::str::from_utf8(stream_open.extract_between(b" to='", b"'").or_else(|_| stream_open.extract_between(b" to=\"", b"\""))?)?;
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let max_stanza_size_bytes = config.max_stanza_size_bytes;
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let (out_wr, out_rd, stream_open) = srv_connect(to, is_c2s, &stream_open, &mut in_filter, client_addr, config).await?;
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// send server response to client
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in_wr.write_all(is_c2s, &stream_open, 0, client_addr.log_from()).await?;
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in_wr.flush().await?;
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drop(stream_open);
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shuffle_rd_wr_filter_only(in_rd, in_wr, out_rd, out_wr, is_c2s, max_stanza_size_bytes, client_addr, in_filter).await
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}
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pub fn spawn_outgoing_listener(listener: TcpListener, config: OutgoingConfig) -> JoinHandle<Result<()>> {
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tokio::spawn(async move {
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loop {
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let (stream, client_addr) = listener.accept().await?;
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let config = config.clone();
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tokio::spawn(async move {
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let mut client_addr = Context::new("unk-out", client_addr);
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if let Err(e) = handle_outgoing_connection(stream, &mut client_addr, config).await {
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error!("{} {}", client_addr.log_from(), e);
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}
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});
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}
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})
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}
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