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/*
* meli - melib library
*
* Copyright 2020 Manos Pitsidianakis
*
* This file is part of meli.
*
* meli is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* meli is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with meli. If not, see <http://www.gnu.org/licenses/>.
*/
#[cfg(feature = "deflate_compression")]
use flate2::{read::DeflateDecoder, write::DeflateEncoder, Compression};
#[derive(Debug)]
pub enum Connection {
Tcp(std::net::TcpStream),
Fd(std::os::unix::io::RawFd),
#[cfg(feature = "imap_backend")]
Tls(native_tls::TlsStream<Self>),
#[cfg(feature = "deflate_compression")]
Deflate {
inner: DeflateEncoder<DeflateDecoder<Box<Self>>>,
},
}
use Connection::*;
impl Connection {
pub const IO_BUF_SIZE: usize = 64 * 1024;
#[cfg(feature = "deflate_compression")]
pub fn deflate(self) -> Self {
Connection::Deflate {
inner: DeflateEncoder::new(
DeflateDecoder::new_with_buf(Box::new(self), vec![0; Self::IO_BUF_SIZE]),
Compression::default(),
),
}
}
pub fn set_nonblocking(&self, nonblocking: bool) -> std::io::Result<()> {
match self {
Tcp(ref t) => t.set_nonblocking(nonblocking),
#[cfg(feature = "imap_backend")]
Tls(ref t) => t.get_ref().set_nonblocking(nonblocking),
Fd(fd) => {
//FIXME TODO Review
nix::fcntl::fcntl(
*fd,
nix::fcntl::FcntlArg::F_SETFL(if nonblocking {
nix::fcntl::OFlag::O_NONBLOCK
} else {
!nix::fcntl::OFlag::O_NONBLOCK
}),
)
.map_err(|err| {
std::io::Error::from_raw_os_error(err.as_errno().map(|n| n as i32).unwrap_or(0))
})?;
Ok(())
}
#[cfg(feature = "deflate_compression")]
Deflate { ref inner, .. } => inner.get_ref().get_ref().set_nonblocking(nonblocking),
}
}
pub fn set_read_timeout(&self, dur: Option<std::time::Duration>) -> std::io::Result<()> {
match self {
Tcp(ref t) => t.set_read_timeout(dur),
#[cfg(feature = "imap_backend")]
Tls(ref t) => t.get_ref().set_read_timeout(dur),
Fd(_) => Ok(()),
#[cfg(feature = "deflate_compression")]
Deflate { ref inner, .. } => inner.get_ref().get_ref().set_read_timeout(dur),
}
}
pub fn set_write_timeout(&self, dur: Option<std::time::Duration>) -> std::io::Result<()> {
match self {
Tcp(ref t) => t.set_write_timeout(dur),
#[cfg(feature = "imap_backend")]
Tls(ref t) => t.get_ref().set_write_timeout(dur),
Fd(_) => Ok(()),
#[cfg(feature = "deflate_compression")]
Deflate { ref inner, .. } => inner.get_ref().get_ref().set_write_timeout(dur),
}
}
}
impl Drop for Connection {
fn drop(&mut self) {
if let Fd(fd) = self {
let _ = nix::unistd::close(*fd);
}
}
}
impl std::io::Read for Connection {
fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
match self {
Tcp(ref mut t) => t.read(buf),
#[cfg(feature = "imap_backend")]
Tls(ref mut t) => t.read(buf),
Fd(f) => {
use std::os::unix::io::{FromRawFd, IntoRawFd};
let mut f = unsafe { std::fs::File::from_raw_fd(*f) };
let ret = f.read(buf);
let _ = f.into_raw_fd();
ret
}
#[cfg(feature = "deflate_compression")]
Deflate { ref mut inner, .. } => inner.read(buf),
}
}
}
impl std::io::Write for Connection {
fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
match self {
Tcp(ref mut t) => t.write(buf),
#[cfg(feature = "imap_backend")]
Tls(ref mut t) => t.write(buf),
Fd(f) => {
use std::os::unix::io::{FromRawFd, IntoRawFd};
let mut f = unsafe { std::fs::File::from_raw_fd(*f) };
let ret = f.write(buf);
let _ = f.into_raw_fd();
ret
}
#[cfg(feature = "deflate_compression")]
Deflate { ref mut inner, .. } => inner.write(buf),
}
}
fn flush(&mut self) -> std::io::Result<()> {
match self {
Tcp(ref mut t) => t.flush(),
#[cfg(feature = "imap_backend")]
Tls(ref mut t) => t.flush(),
Fd(f) => {
use std::os::unix::io::{FromRawFd, IntoRawFd};
let mut f = unsafe { std::fs::File::from_raw_fd(*f) };
let ret = f.flush();
let _ = f.into_raw_fd();
ret
}
#[cfg(feature = "deflate_compression")]
Deflate { ref mut inner, .. } => inner.flush(),
}
}
}
impl std::os::unix::io::AsRawFd for Connection {
fn as_raw_fd(&self) -> std::os::unix::io::RawFd {
match self {
Tcp(ref t) => t.as_raw_fd(),
#[cfg(feature = "imap_backend")]
Tls(ref t) => t.get_ref().as_raw_fd(),
Fd(f) => *f,
#[cfg(feature = "deflate_compression")]
Deflate { ref inner, .. } => inner.get_ref().get_ref().as_raw_fd(),
}
}
}
pub fn lookup_ipv4(host: &str, port: u16) -> crate::Result<std::net::SocketAddr> {
use std::net::ToSocketAddrs;
let addrs = (host, port).to_socket_addrs()?;
for addr in addrs {
if let std::net::SocketAddr::V4(_) = addr {
return Ok(addr);
}
}
Err(
crate::error::MeliError::new(format!("Could not lookup address {}:{}", host, port))
.set_kind(crate::error::ErrorKind::Network),
)
}