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use std::io::ErrorKind;
use mio::net::*;
use rustls::ServerConnection;
use rusty_ulid::Ulid;
use crate::{protocol::ProtocolResult, Readiness, Ready, SessionResult};
pub enum TlsState {
Initial,
Handshake,
Established,
Error,
}
pub struct TlsHandshake {
pub stream: TcpStream,
pub session: ServerConnection,
pub readiness: Readiness,
pub request_id: Ulid,
}
impl TlsHandshake {
pub fn new(session: ServerConnection, stream: TcpStream, request_id: Ulid) -> TlsHandshake {
TlsHandshake {
stream,
session,
readiness: Readiness {
interest: Ready::readable() | Ready::hup() | Ready::error(),
event: Ready::empty(),
},
request_id,
}
}
pub fn readable(&mut self) -> (ProtocolResult, SessionResult) {
let mut can_read = true;
loop {
let mut can_work = false;
if self.session.wants_read() && can_read {
can_work = true;
match self.session.read_tls(&mut self.stream) {
Ok(0) => {
error!("connection closed during handshake");
return (ProtocolResult::Continue, SessionResult::CloseSession);
}
Ok(_) => {}
Err(e) => match e.kind() {
ErrorKind::WouldBlock => {
self.readiness.event.remove(Ready::readable());
can_read = false
}
_ => {
error!("could not perform handshake: {:?}", e);
return (ProtocolResult::Continue, SessionResult::CloseSession);
}
},
}
if let Err(e) = self.session.process_new_packets() {
error!("could not perform handshake: {:?}", e);
return (ProtocolResult::Continue, SessionResult::CloseSession);
}
}
if !can_work {
break;
}
}
if !self.session.wants_read() {
self.readiness.interest.remove(Ready::readable());
}
if self.session.wants_write() {
self.readiness.interest.insert(Ready::writable());
}
if self.session.is_handshaking() {
(ProtocolResult::Continue, SessionResult::Continue)
} else {
if self.session.wants_write() {
(ProtocolResult::Continue, SessionResult::Continue)
} else {
self.readiness.interest.insert(Ready::readable());
self.readiness.event.insert(Ready::readable());
self.readiness.interest.insert(Ready::writable());
(ProtocolResult::Upgrade, SessionResult::Continue)
}
}
}
pub fn writable(&mut self) -> (ProtocolResult, SessionResult) {
let mut can_write = true;
loop {
let mut can_work = false;
if self.session.wants_write() && can_write {
can_work = true;
match self.session.write_tls(&mut self.stream) {
Ok(_) => {}
Err(e) => match e.kind() {
ErrorKind::WouldBlock => {
self.readiness.event.remove(Ready::writable());
can_write = false
}
_ => {
error!("could not perform handshake: {:?}", e);
return (ProtocolResult::Continue, SessionResult::CloseSession);
}
},
}
if let Err(e) = self.session.process_new_packets() {
error!("could not perform handshake: {:?}", e);
return (ProtocolResult::Continue, SessionResult::CloseSession);
}
}
if !can_work {
break;
}
}
if !self.session.wants_write() {
self.readiness.interest.remove(Ready::writable());
}
if self.session.wants_read() {
self.readiness.interest.insert(Ready::readable());
}
if self.session.is_handshaking() {
(ProtocolResult::Continue, SessionResult::Continue)
} else if self.session.wants_read() {
self.readiness.interest.insert(Ready::readable());
(ProtocolResult::Upgrade, SessionResult::Continue)
} else {
self.readiness.interest.insert(Ready::writable());
self.readiness.interest.insert(Ready::readable());
(ProtocolResult::Upgrade, SessionResult::Continue)
}
}
}