nc 0.8.13

Access system calls directly
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

// Copyright (c) 2020 Xu Shaohua <shaohua@biofan.org>. All rights reserved.
// Use of this source is governed by Apache-2.0 License that can be found
// in the LICENSE file.

use core::mem::size_of;
use nc::Errno;

fn main() -> Result<(), Errno> {
    let listen_fd = unsafe { nc::socket(nc::AF_INET, nc::SOCK_STREAM, 0)? };

    let addr = nc::sockaddr_in_t {
        sin_family: nc::AF_INET as nc::sa_family_t,
        // TODO(Shaohua): Add htons()
        sin_port: 4200,
        sin_addr: nc::in_addr_t {
            s_addr: nc::INADDR_ANY as u32,
        },
        ..Default::default()
    };

    unsafe {
        nc::bind(listen_fd, &addr, size_of::<nc::sockaddr_in_t>() as u32)?;
        nc::listen(listen_fd, nc::SOCK_STREAM)?;
    }

    let mut conn_addr = nc::sockaddr_in_t::default();
    let mut conn_addr_len: nc::socklen_t = 0;
    let conn_fd = unsafe {
        nc::accept4(
            listen_fd,
            &mut conn_addr,
            &mut conn_addr_len,
            nc::SOCK_CLOEXEC,
        )?
    };
    println!("conn_fd: {:?}", conn_fd);

    Ok(())
}