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//            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
//                    Version 2, December 2004
//
// Copyleft (ↄ) meh. <meh@schizofreni.co> | http://meh.schizofreni.co
//
// Everyone is permitted to copy and distribute verbatim or modified
// copies of this license document, and changing it is allowed as long
// as the name is changed.
//
//            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
//   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
//
//  0. You just DO WHAT THE FUCK YOU WANT TO.

//! Bindings to internal Linux stuff.

use ioctl::*;
use libc::sockaddr;
use libc::{c_char, c_int, c_short, c_uchar, c_uint, c_ulong, c_ushort, c_void};

pub const IFNAMSIZ: usize = 16;

pub const IFF_UP: c_short = 0x1;
pub const IFF_RUNNING: c_short = 0x40;

pub const IFF_TUN: c_short = 0x0001;
pub const IFF_TAP: c_short = 0x0002;
pub const IFF_NO_PI: c_short = 0x1000;
pub const IFF_MULTI_QUEUE: c_short = 0x0100;

#[repr(C)]
#[derive(Copy, Clone)]
pub struct ifmap {
    pub mem_start: c_ulong,
    pub mem_end: c_ulong,
    pub base_addr: c_ushort,
    pub irq: c_uchar,
    pub dma: c_uchar,
    pub port: c_uchar,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub union ifsu {
    pub raw_hdlc_proto: *mut c_void,
    pub cisco: *mut c_void,
    pub fr: *mut c_void,
    pub fr_pvc: *mut c_void,
    pub fr_pvc_info: *mut c_void,
    pub sync: *mut c_void,
    pub te1: *mut c_void,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct if_settings {
    pub type_: c_uint,
    pub size: c_uint,
    pub ifsu: ifsu,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub union ifrn {
    pub name: [c_char; IFNAMSIZ],
}

#[repr(C)]
#[derive(Copy, Clone)]
pub union ifru {
    pub addr: sockaddr,
    pub dstaddr: sockaddr,
    pub broadaddr: sockaddr,
    pub netmask: sockaddr,
    pub hwaddr: sockaddr,

    pub flags: c_short,
    pub ivalue: c_int,
    pub mtu: c_int,
    pub map: ifmap,
    pub slave: [c_char; IFNAMSIZ],
    pub newname: [c_char; IFNAMSIZ],
    pub data: *mut c_void,
    pub settings: if_settings,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct ifreq {
    pub ifrn: ifrn,
    pub ifru: ifru,
}

ioctl!(bad read siocgifflags with 0x8913; ifreq);
ioctl!(bad write siocsifflags with 0x8914; ifreq);
ioctl!(bad read siocgifaddr with 0x8915; ifreq);
ioctl!(bad write siocsifaddr with 0x8916; ifreq);
ioctl!(bad read siocgifdstaddr with 0x8917; ifreq);
ioctl!(bad write siocsifdstaddr with 0x8918; ifreq);
ioctl!(bad read siocgifbrdaddr with 0x8919; ifreq);
ioctl!(bad write siocsifbrdaddr with 0x891a; ifreq);
ioctl!(bad read siocgifnetmask with 0x891b; ifreq);
ioctl!(bad write siocsifnetmask with 0x891c; ifreq);
ioctl!(bad read siocgifmtu with 0x8921; ifreq);
ioctl!(bad write siocsifmtu with 0x8922; ifreq);
ioctl!(bad write siocsifname with 0x8923; ifreq);

ioctl!(write tunsetiff with b'T', 202; c_int);
ioctl!(write tunsetpersist with b'T', 203; c_int);
ioctl!(write tunsetowner with b'T', 204; c_int);
ioctl!(write tunsetgroup with b'T', 206; c_int);