2022-01-19 01:14:39 -05:00
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#![deny(clippy::all)]
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2021-04-12 23:40:44 -04:00
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use std::ffi::OsString;
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use std::fs::File;
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use std::io;
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2021-04-27 02:02:02 -04:00
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use std::io::{BufReader, Read, Write};
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2021-04-12 23:40:44 -04:00
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use std::iter::Iterator;
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use std::net::SocketAddr;
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use std::path::Path;
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use std::sync::Arc;
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use die::Die;
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use serde_derive::Deserialize;
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2022-02-10 01:18:35 -05:00
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use tokio::io::{AsyncWriteExt, ReadHalf, WriteHalf};
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2021-04-12 23:40:44 -04:00
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use tokio::net::TcpListener;
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use tokio::task::JoinHandle;
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2022-01-19 01:09:32 -05:00
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#[cfg(feature = "rustls")]
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use rustls::{Certificate, PrivateKey, ServerConfig};
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#[cfg(feature = "rustls-pemfile")]
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use rustls_pemfile::{certs, pkcs8_private_keys};
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#[cfg(feature = "tokio-rustls")]
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use tokio_rustls::TlsAcceptor;
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2021-04-12 23:40:44 -04:00
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use anyhow::{bail, Result};
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mod slicesubsequence;
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use slicesubsequence::*;
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2021-06-08 00:14:22 -04:00
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pub use xmpp_proxy::*;
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2021-05-15 00:23:04 -04:00
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2021-04-27 02:02:02 -04:00
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#[cfg(feature = "quic")]
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mod quic;
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#[cfg(feature = "quic")]
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use crate::quic::*;
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mod tls;
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use crate::tls::*;
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#[cfg(feature = "outgoing")]
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mod outgoing;
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#[cfg(feature = "outgoing")]
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use crate::outgoing::*;
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#[cfg(feature = "outgoing")]
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mod srv;
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#[cfg(feature = "outgoing")]
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use crate::srv::*;
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2021-07-28 02:24:08 -04:00
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#[cfg(feature = "websocket")]
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mod websocket;
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#[cfg(feature = "websocket")]
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use crate::websocket::*;
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2022-02-10 01:18:35 -05:00
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mod in_out;
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pub use crate::in_out::*;
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2021-04-12 23:40:44 -04:00
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const IN_BUFFER_SIZE: usize = 8192;
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2022-01-19 01:09:32 -05:00
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// todo: split these out to outgoing module
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const ALPN_XMPP_CLIENT: &[u8] = b"xmpp-client";
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const ALPN_XMPP_SERVER: &[u8] = b"xmpp-server";
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#[cfg(feature = "webpki-roots")]
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pub fn root_cert_store() -> rustls::RootCertStore {
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use rustls::{OwnedTrustAnchor, RootCertStore};
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let mut root_cert_store = RootCertStore::empty();
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root_cert_store.add_server_trust_anchors(
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webpki_roots::TLS_SERVER_ROOTS
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.0
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.iter()
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.map(|ta| OwnedTrustAnchor::from_subject_spki_name_constraints(ta.subject, ta.spki, ta.name_constraints)),
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);
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root_cert_store
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}
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2021-04-27 02:02:02 -04:00
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2022-02-10 01:18:35 -05:00
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#[cfg(feature = "rustls-native-certs")]
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pub fn root_cert_store() -> rustls::RootCertStore {
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use rustls::RootCertStore;
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let mut root_cert_store = RootCertStore::empty();
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for cert in rustls_native_certs::load_native_certs().expect("could not load platform certs") {
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root_cert_store.add(&rustls::Certificate(cert.0)).unwrap();
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}
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root_cert_store
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}
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2021-04-12 23:40:44 -04:00
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#[derive(Deserialize)]
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struct Config {
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tls_key: String,
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tls_cert: String,
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2021-05-12 00:51:53 -04:00
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incoming_listen: Option<Vec<String>>,
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2021-04-27 02:02:02 -04:00
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quic_listen: Option<Vec<String>>,
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2021-07-28 02:24:08 -04:00
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websocket_listen: Option<Vec<String>>,
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2021-04-27 02:02:02 -04:00
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outgoing_listen: Option<Vec<String>>,
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2021-04-12 23:40:44 -04:00
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max_stanza_size_bytes: usize,
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2021-07-24 01:53:00 -04:00
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s2s_target: SocketAddr,
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c2s_target: SocketAddr,
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2021-04-12 23:40:44 -04:00
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proxy: bool,
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2022-01-19 01:09:32 -05:00
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#[cfg(feature = "logging")]
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2021-06-08 00:14:22 -04:00
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log_level: Option<String>,
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2022-01-19 01:09:32 -05:00
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#[cfg(feature = "logging")]
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2021-06-08 00:14:22 -04:00
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log_style: Option<String>,
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2021-04-12 23:40:44 -04:00
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}
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#[derive(Clone)]
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2021-04-27 02:02:02 -04:00
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pub struct CloneableConfig {
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2021-04-12 23:40:44 -04:00
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max_stanza_size_bytes: usize,
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2021-07-24 01:53:00 -04:00
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s2s_target: SocketAddr,
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c2s_target: SocketAddr,
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2021-04-12 23:40:44 -04:00
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proxy: bool,
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}
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impl Config {
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fn parse<P: AsRef<Path>>(path: P) -> Result<Config> {
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let mut f = File::open(path)?;
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let mut input = String::new();
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f.read_to_string(&mut input)?;
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Ok(toml::from_str(&input)?)
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}
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2021-04-27 02:02:02 -04:00
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fn get_cloneable_cfg(&self) -> CloneableConfig {
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CloneableConfig {
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2021-04-12 23:40:44 -04:00
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max_stanza_size_bytes: self.max_stanza_size_bytes,
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2021-07-28 02:24:08 -04:00
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s2s_target: self.s2s_target,
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c2s_target: self.c2s_target,
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2021-04-12 23:40:44 -04:00
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proxy: self.proxy,
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2021-04-27 02:02:02 -04:00
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}
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2021-04-12 23:40:44 -04:00
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}
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2022-01-19 01:09:32 -05:00
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#[cfg(all(feature = "rustls-pemfile", feature = "rustls"))]
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fn server_config(&self) -> Result<ServerConfig> {
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let mut tls_key: Vec<PrivateKey> = pkcs8_private_keys(&mut BufReader::new(File::open(&self.tls_key)?))
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.map_err(|_| io::Error::new(io::ErrorKind::InvalidInput, "invalid key"))
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.map(|mut keys| keys.drain(..).map(PrivateKey).collect())?;
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2021-04-12 23:40:44 -04:00
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if tls_key.is_empty() {
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bail!("invalid key");
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}
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let tls_key = tls_key.remove(0);
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2022-01-19 01:09:32 -05:00
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let tls_certs = certs(&mut BufReader::new(File::open(&self.tls_cert)?))
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.map_err(|_| io::Error::new(io::ErrorKind::InvalidInput, "invalid cert"))
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.map(|mut certs| certs.drain(..).map(Certificate).collect())?;
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let config = ServerConfig::builder().with_safe_defaults().with_no_client_auth().with_single_cert(tls_certs, tls_key)?;
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2021-04-12 23:40:44 -04:00
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2022-01-19 01:09:32 -05:00
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Ok(config)
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}
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#[cfg(all(feature = "tokio-rustls", feature = "rustls-pemfile", feature = "rustls"))]
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fn tls_acceptor(&self) -> Result<TlsAcceptor> {
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Ok(TlsAcceptor::from(Arc::new(self.server_config()?)))
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2021-04-12 23:40:44 -04:00
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}
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}
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2022-02-10 01:18:35 -05:00
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async fn shuffle_rd_wr(in_rd: StanzaRead, in_wr: StanzaWrite, config: CloneableConfig, local_addr: SocketAddr, client_addr: &mut Context<'_>) -> Result<()> {
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2021-04-27 02:02:02 -04:00
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let filter = StanzaFilter::new(config.max_stanza_size_bytes);
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2021-05-15 00:32:36 -04:00
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shuffle_rd_wr_filter(in_rd, in_wr, config, local_addr, client_addr, filter).await
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2021-04-27 02:02:02 -04:00
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}
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2021-04-12 23:40:44 -04:00
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2022-02-10 01:18:35 -05:00
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async fn shuffle_rd_wr_filter(
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mut in_rd: StanzaRead,
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mut in_wr: StanzaWrite,
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config: CloneableConfig,
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local_addr: SocketAddr,
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2021-07-24 01:53:00 -04:00
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client_addr: &mut Context<'_>,
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2022-02-10 01:18:35 -05:00
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mut in_filter: StanzaFilter,
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2021-04-27 02:02:02 -04:00
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) -> Result<()> {
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2021-04-12 23:40:44 -04:00
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// now read to figure out client vs server
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2022-02-10 01:18:35 -05:00
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let (stream_open, is_c2s) = stream_preamble(&mut in_rd, &mut in_wr, client_addr.log_from(), &mut in_filter).await?;
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2021-04-27 02:02:02 -04:00
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2022-02-10 01:18:35 -05:00
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let (out_rd, out_wr) = open_incoming(&config, local_addr, client_addr, &stream_open, is_c2s, &mut in_filter).await?;
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2021-04-12 23:40:44 -04:00
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drop(stream_open);
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2022-02-10 01:18:35 -05:00
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shuffle_rd_wr_filter_only(
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in_rd,
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in_wr,
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StanzaRead::new(Box::new(out_rd)),
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StanzaWrite::new(Box::new(out_wr)),
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is_c2s,
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config.max_stanza_size_bytes,
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client_addr,
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in_filter,
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)
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.await
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}
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#[allow(clippy::too_many_arguments)]
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async fn shuffle_rd_wr_filter_only(
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mut in_rd: StanzaRead,
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mut in_wr: StanzaWrite,
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mut out_rd: StanzaRead,
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mut out_wr: StanzaWrite,
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is_c2s: bool,
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max_stanza_size_bytes: usize,
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client_addr: &mut Context<'_>,
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mut in_filter: StanzaFilter,
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) -> Result<()> {
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let mut out_filter = StanzaFilter::new(max_stanza_size_bytes);
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2021-04-12 23:40:44 -04:00
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loop {
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tokio::select! {
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2022-02-10 01:18:35 -05:00
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Ok(ret) = in_rd.next(&mut in_filter, client_addr.log_to(), &mut in_wr) => {
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match ret {
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None => break,
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Some((buf, eoft)) => {
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trace!("{} '{}'", client_addr.log_from(), to_str(buf));
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out_wr.write_all(is_c2s, buf, eoft, client_addr.log_from()).await?;
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out_wr.flush().await?;
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}
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2021-04-15 00:49:52 -04:00
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}
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2022-02-10 01:18:35 -05:00
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},
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Ok(ret) = out_rd.next(&mut out_filter, client_addr.log_from(), &mut out_wr) => {
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match ret {
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None => break,
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Some((buf, eoft)) => {
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trace!("{} '{}'", client_addr.log_to(), to_str(buf));
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in_wr.write_all(is_c2s, buf, eoft, client_addr.log_to()).await?;
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in_wr.flush().await?;
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}
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}
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},
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2021-04-12 23:40:44 -04:00
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}
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}
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2021-07-24 01:53:00 -04:00
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info!("{} disconnected", client_addr.log_from());
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2021-04-12 23:40:44 -04:00
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Ok(())
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}
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2021-07-28 02:24:08 -04:00
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async fn open_incoming(
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config: &CloneableConfig,
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2021-07-28 02:24:08 -04:00
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local_addr: SocketAddr,
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client_addr: &mut Context<'_>,
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stream_open: &[u8],
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is_c2s: bool,
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in_filter: &mut StanzaFilter,
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) -> Result<(ReadHalf<tokio::net::TcpStream>, WriteHalf<tokio::net::TcpStream>)> {
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let target = if is_c2s { config.c2s_target } else { config.s2s_target };
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client_addr.set_to_addr(target);
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2022-01-19 01:14:39 -05:00
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client_addr.set_c2s_stream_open(is_c2s, stream_open);
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2021-07-28 02:24:08 -04:00
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let out_stream = tokio::net::TcpStream::connect(target).await?;
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let (out_rd, mut out_wr) = tokio::io::split(out_stream);
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if config.proxy {
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/*
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https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt
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PROXY TCP4 255.255.255.255 255.255.255.255 65535 65535\r\n
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PROXY TCP6 ffff:f...f:ffff ffff:f...f:ffff 65535 65535\r\n
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PROXY TCP6 SOURCE_IP DEST_IP SOURCE_PORT DEST_PORT\r\n
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*/
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// tokio AsyncWrite doesn't have write_fmt so have to go through this buffer for some crazy reason
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//write!(out_wr, "PROXY TCP{} {} {} {} {}\r\n", if client_addr.is_ipv4() { '4' } else {'6' }, client_addr.ip(), local_addr.ip(), client_addr.port(), local_addr.port())?;
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write!(
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&mut in_filter.buf[0..],
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"PROXY TCP{} {} {} {} {}\r\n",
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if client_addr.client_addr().is_ipv4() { '4' } else { '6' },
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client_addr.client_addr().ip(),
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local_addr.ip(),
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client_addr.client_addr().port(),
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local_addr.port()
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)?;
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let end_idx = &(&in_filter.buf[0..]).first_index_of(b"\n")? + 1;
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trace!("{} '{}'", client_addr.log_from(), to_str(&in_filter.buf[0..end_idx]));
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out_wr.write_all(&in_filter.buf[0..end_idx]).await?;
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}
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2022-01-19 01:14:39 -05:00
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trace!("{} '{}'", client_addr.log_from(), to_str(stream_open));
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out_wr.write_all(stream_open).await?;
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2021-07-28 02:24:08 -04:00
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out_wr.flush().await?;
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Ok((out_rd, out_wr))
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}
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2022-02-10 01:18:35 -05:00
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pub async fn stream_preamble(in_rd: &mut StanzaRead, in_wr: &mut StanzaWrite, client_addr: &'_ str, in_filter: &mut StanzaFilter) -> Result<(Vec<u8>, bool)> {
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2021-04-27 02:02:02 -04:00
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let mut stream_open = Vec::new();
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2022-02-10 01:18:35 -05:00
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while let Ok(Some((buf, _))) = in_rd.next(in_filter, client_addr, in_wr).await {
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trace!("{} received pre-<stream:stream> stanza: '{}'", client_addr, to_str(buf));
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2021-04-27 02:02:02 -04:00
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if buf.starts_with(b"<?xml ") {
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stream_open.extend_from_slice(buf);
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} else if buf.starts_with(b"<stream:stream ") {
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stream_open.extend_from_slice(buf);
|
2022-02-10 01:18:35 -05:00
|
|
|
return Ok((stream_open, buf.contains_seq(br#" xmlns="jabber:client""#) || buf.contains_seq(br#" xmlns='jabber:client'"#)));
|
2021-04-27 02:02:02 -04:00
|
|
|
} else {
|
2022-01-19 01:14:39 -05:00
|
|
|
bail!("bad pre-<stream:stream> stanza: {}", to_str(buf));
|
2021-04-12 23:40:44 -04:00
|
|
|
}
|
2021-04-27 02:02:02 -04:00
|
|
|
}
|
2022-02-10 01:18:35 -05:00
|
|
|
bail!("stream ended before open")
|
2021-04-12 23:40:44 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
#[tokio::main]
|
|
|
|
//#[tokio::main(flavor = "multi_thread", worker_threads = 10)]
|
|
|
|
async fn main() {
|
2021-06-08 00:41:15 -04:00
|
|
|
let main_config = Config::parse(std::env::args_os().nth(1).unwrap_or_else(|| OsString::from("/etc/xmpp-proxy/xmpp-proxy.toml"))).die("invalid config file");
|
2021-04-12 23:40:44 -04:00
|
|
|
|
2022-01-19 01:09:32 -05:00
|
|
|
#[cfg(feature = "logging")]
|
2021-06-08 00:14:22 -04:00
|
|
|
{
|
|
|
|
use env_logger::{Builder, Env, Target};
|
|
|
|
let env = Env::default().filter_or("XMPP_PROXY_LOG_LEVEL", "info").write_style_or("XMPP_PROXY_LOG_STYLE", "never");
|
|
|
|
let mut builder = Builder::from_env(env);
|
|
|
|
builder.target(Target::Stdout);
|
|
|
|
if let Some(ref log_level) = main_config.log_level {
|
|
|
|
builder.parse_filters(log_level);
|
|
|
|
}
|
|
|
|
if let Some(ref log_style) = main_config.log_style {
|
|
|
|
builder.parse_write_style(log_style);
|
|
|
|
}
|
2022-02-10 01:18:35 -05:00
|
|
|
// todo: config for this: builder.format_timestamp(None);
|
2021-06-08 00:14:22 -04:00
|
|
|
builder.init();
|
|
|
|
}
|
|
|
|
|
2021-04-27 02:02:02 -04:00
|
|
|
let config = main_config.get_cloneable_cfg();
|
2021-04-12 23:40:44 -04:00
|
|
|
|
2021-04-27 02:02:02 -04:00
|
|
|
let mut handles: Vec<JoinHandle<Result<()>>> = Vec::new();
|
|
|
|
#[cfg(feature = "incoming")]
|
2021-05-12 00:51:53 -04:00
|
|
|
if let Some(ref listeners) = main_config.incoming_listen {
|
2021-04-27 02:02:02 -04:00
|
|
|
let acceptor = main_config.tls_acceptor().die("invalid cert/key ?");
|
|
|
|
for listener in listeners {
|
|
|
|
handles.push(spawn_tls_listener(listener.parse().die("invalid listener address"), config.clone(), acceptor.clone()));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#[cfg(feature = "quic")]
|
|
|
|
if let Some(ref listeners) = main_config.quic_listen {
|
|
|
|
let quic_config = main_config.quic_server_config().die("invalid cert/key ?");
|
|
|
|
for listener in listeners {
|
|
|
|
handles.push(spawn_quic_listener(listener.parse().die("invalid listener address"), config.clone(), quic_config.clone()));
|
|
|
|
}
|
|
|
|
}
|
2021-07-28 02:24:08 -04:00
|
|
|
#[cfg(feature = "websocket")]
|
|
|
|
if let Some(ref listeners) = main_config.websocket_listen {
|
|
|
|
let acceptor = main_config.tls_acceptor().die("invalid cert/key ?");
|
|
|
|
for listener in listeners {
|
|
|
|
handles.push(spawn_websocket_listener(listener.parse().die("invalid listener address"), config.clone(), acceptor.clone()));
|
|
|
|
}
|
|
|
|
}
|
2021-04-27 02:02:02 -04:00
|
|
|
#[cfg(feature = "outgoing")]
|
|
|
|
if let Some(ref listeners) = main_config.outgoing_listen {
|
|
|
|
for listener in listeners {
|
|
|
|
handles.push(spawn_outgoing_listener(listener.parse().die("invalid listener address"), config.max_stanza_size_bytes));
|
|
|
|
}
|
2021-04-12 23:40:44 -04:00
|
|
|
}
|
2021-07-24 01:53:00 -04:00
|
|
|
info!("xmpp-proxy started");
|
2021-04-12 23:40:44 -04:00
|
|
|
futures::future::join_all(handles).await;
|
2021-07-24 01:53:00 -04:00
|
|
|
info!("xmpp-proxy terminated");
|
2021-04-12 23:40:44 -04:00
|
|
|
}
|