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use crate as neli;
use std::io::Cursor;
use crate::{
attr::{AttrHandle, AttrHandleMut, Attribute},
consts::rtnl::*,
err::{DeError, SerError},
types::{Buffer, RtBuffer},
FromBytes, FromBytesWithInput, Header, Size, ToBytes,
};
#[derive(Debug, Size, ToBytes, FromBytesWithInput, Header)]
pub struct Ifinfomsg {
pub ifi_family: RtAddrFamily,
padding: u8,
pub ifi_type: Arphrd,
pub ifi_index: libc::c_int,
pub ifi_flags: IffFlags,
pub ifi_change: IffFlags,
#[neli(input = "input.checked_sub(Self::header_size()).ok_or(DeError::UnexpectedEOB)?")]
pub rtattrs: RtBuffer<Ifla, Buffer>,
}
impl Ifinfomsg {
pub fn new(
ifi_family: RtAddrFamily,
ifi_type: Arphrd,
ifi_index: libc::c_int,
ifi_flags: IffFlags,
ifi_change: IffFlags,
rtattrs: RtBuffer<Ifla, Buffer>,
) -> Self {
Ifinfomsg {
ifi_family,
padding: 0,
ifi_type,
ifi_index,
ifi_flags,
ifi_change,
rtattrs,
}
}
pub fn up(
ifi_family: RtAddrFamily,
ifi_type: Arphrd,
ifi_index: libc::c_int,
rtattrs: RtBuffer<Ifla, Buffer>,
) -> Self {
Ifinfomsg {
ifi_family,
padding: 0,
ifi_type,
ifi_index,
ifi_flags: IffFlags::new(&[Iff::Up]),
ifi_change: IffFlags::new(&[Iff::Up]),
rtattrs,
}
}
pub fn down(
ifi_family: RtAddrFamily,
ifi_type: Arphrd,
ifi_index: libc::c_int,
rtattrs: RtBuffer<Ifla, Buffer>,
) -> Self {
Ifinfomsg {
ifi_family,
padding: 0,
ifi_type,
ifi_index,
ifi_flags: IffFlags::empty(),
ifi_change: IffFlags::new(&[Iff::Up]),
rtattrs,
}
}
}
#[derive(Debug, Size, ToBytes, FromBytesWithInput, Header)]
pub struct Ifaddrmsg {
pub ifa_family: RtAddrFamily,
pub ifa_prefixlen: libc::c_uchar,
pub ifa_flags: IfaFFlags,
pub ifa_scope: libc::c_uchar,
pub ifa_index: libc::c_int,
#[neli(input = "input.checked_sub(Self::header_size()).ok_or(DeError::UnexpectedEOB)?")]
pub rtattrs: RtBuffer<Ifa, Buffer>,
}
#[derive(Debug, Size, ToBytes, FromBytes)]
pub struct Rtgenmsg {
pub rtgen_family: RtAddrFamily,
}
#[derive(Debug, Size, ToBytes, FromBytesWithInput, Header)]
pub struct Rtmsg {
pub rtm_family: RtAddrFamily,
pub rtm_dst_len: libc::c_uchar,
pub rtm_src_len: libc::c_uchar,
pub rtm_tos: libc::c_uchar,
pub rtm_table: RtTable,
pub rtm_protocol: Rtprot,
pub rtm_scope: RtScope,
pub rtm_type: Rtn,
pub rtm_flags: RtmFFlags,
#[neli(input = "input.checked_sub(Self::header_size()).ok_or(DeError::UnexpectedEOB)?")]
pub rtattrs: RtBuffer<Rta, Buffer>,
}
#[derive(Debug, Size, ToBytes, FromBytesWithInput, Header)]
pub struct Ndmsg {
pub ndm_family: RtAddrFamily,
pad1: u8,
pad2: u16,
pub ndm_index: libc::c_int,
pub ndm_state: NudFlags,
pub ndm_flags: NtfFlags,
pub ndm_type: Rtn,
#[neli(input = "input.checked_sub(Self::header_size()).ok_or(DeError::UnexpectedEOB)?")]
pub rtattrs: RtBuffer<Nda, Buffer>,
}
impl Ndmsg {
pub fn new(
ndm_family: RtAddrFamily,
ndm_index: libc::c_int,
ndm_state: NudFlags,
ndm_flags: NtfFlags,
ndm_type: Rtn,
rtattrs: RtBuffer<Nda, Buffer>,
) -> Self {
Ndmsg {
ndm_family,
pad1: 0,
pad2: 0,
ndm_index,
ndm_state,
ndm_flags,
ndm_type,
rtattrs,
}
}
}
#[derive(Debug, Size, ToBytes, FromBytes)]
pub struct NdaCacheinfo {
pub ndm_confirmed: u32,
pub ndm_used: u32,
pub ndm_updated: u32,
pub ndm_refcnt: u32,
}
#[derive(Debug, Size, ToBytes, FromBytesWithInput, Header)]
pub struct Tcmsg {
pub tcm_family: libc::c_uchar,
padding_char: libc::c_uchar,
padding_short: libc::c_ushort,
pub tcm_ifindex: libc::c_int,
pub tcm_handle: u32,
pub tcm_parent: u32,
pub tcm_info: u32,
#[neli(input = "input.checked_sub(Self::header_size()).ok_or(DeError::UnexpectedEOB)?")]
pub rtattrs: RtBuffer<Tca, Buffer>,
}
impl Tcmsg {
pub fn new(
tcm_family: libc::c_uchar,
tcm_ifindex: libc::c_int,
tcm_handle: u32,
tcm_parent: u32,
tcm_info: u32,
rtattrs: RtBuffer<Tca, Buffer>,
) -> Self {
Tcmsg {
tcm_family,
padding_char: 0,
padding_short: 0,
tcm_ifindex,
tcm_handle,
tcm_parent,
tcm_info,
rtattrs,
}
}
}
#[derive(Debug, Size, ToBytes, FromBytes, Header)]
#[neli(header_bound = "T: RtaType")]
#[neli(from_bytes_bound = "T: RtaType")]
#[neli(from_bytes_bound = "P: FromBytesWithInput<Input = usize>")]
#[neli(padding)]
pub struct Rtattr<T, P> {
pub rta_len: libc::c_ushort,
pub rta_type: T,
#[neli(
input = "(rta_len as usize).checked_sub(Self::header_size()).ok_or(DeError::UnexpectedEOB)?"
)]
pub rta_payload: P,
}
impl<T> Rtattr<T, Buffer>
where
T: RtaType,
{
pub fn new<P>(_: Option<u16>, rta_type: T, rta_payload: P) -> Result<Self, SerError>
where
P: Size + ToBytes,
{
let mut attr = Rtattr {
rta_len: Self::header_size() as u16,
rta_type,
rta_payload: Buffer::new(),
};
attr.set_payload(&rta_payload)?;
Ok(attr)
}
pub fn add_nested_attribute<TT, P>(&mut self, attr: &Rtattr<TT, P>) -> Result<(), SerError>
where
TT: RtaType,
P: ToBytes,
{
let mut buffer = Cursor::new(Vec::new());
attr.to_bytes(&mut buffer)?;
self.rta_payload.extend_from_slice(buffer.get_ref());
self.rta_len += buffer.get_ref().len() as u16;
Ok(())
}
pub fn get_attr_handle<R>(&self) -> Result<RtAttrHandle<R>, DeError>
where
R: RtaType,
{
Ok(AttrHandle::new(RtBuffer::from_bytes_with_input(
&mut Cursor::new(self.rta_payload.as_ref()),
self.rta_payload.len(),
)?))
}
pub fn get_attr_handle_mut<R>(&mut self) -> Result<RtAttrHandleMut<R>, DeError>
where
R: RtaType,
{
Ok(AttrHandleMut::new(RtBuffer::from_bytes_with_input(
&mut Cursor::new(self.rta_payload.as_ref()),
self.rta_payload.len(),
)?))
}
}
impl<T> Attribute<T> for Rtattr<T, Buffer>
where
T: RtaType,
{
fn payload(&self) -> &Buffer {
&self.rta_payload
}
fn set_payload<P>(&mut self, payload: &P) -> Result<(), SerError>
where
P: Size + ToBytes,
{
let mut buffer = Cursor::new(Vec::new());
payload.to_bytes(&mut buffer)?;
self.rta_len -= self.rta_payload.unpadded_size() as u16;
self.rta_len += buffer.get_ref().len() as u16;
self.rta_payload = Buffer::from(buffer.into_inner());
Ok(())
}
}
type RtAttrHandle<'a, T> = AttrHandle<'a, RtBuffer<T, Buffer>, Rtattr<T, Buffer>>;
type RtAttrHandleMut<'a, T> = AttrHandleMut<'a, RtBuffer<T, Buffer>, Rtattr<T, Buffer>>;
impl<'a, T> AttrHandle<'a, RtBuffer<T, Buffer>, Rtattr<T, Buffer>>
where
T: RtaType,
{
pub fn get_nested_attributes<S>(&mut self, subattr: T) -> Result<RtAttrHandle<S>, DeError>
where
S: RtaType,
{
let payload = self
.get_attribute(subattr)
.ok_or_else(|| DeError::new("Couldn't find specified attribute"))?
.rta_payload
.as_ref();
Ok(AttrHandle::new(RtBuffer::from_bytes_with_input(
&mut Cursor::new(payload),
payload.len(),
)?))
}
pub fn get_attribute(&self, t: T) -> Option<&Rtattr<T, Buffer>> {
self.get_attrs().iter().find(|item| item.rta_type == t)
}
pub fn get_attr_payload_as<'b, R>(&'b self, attr: T) -> Result<R, DeError>
where
R: FromBytes<'b>,
{
match self.get_attribute(attr) {
Some(a) => a.get_payload_as::<R>(),
_ => Err(DeError::new("Failed to find specified attribute")),
}
}
pub fn get_attr_payload_as_with_len<'b, R>(&'b self, attr: T) -> Result<R, DeError>
where
R: FromBytesWithInput<'b, Input = usize>,
{
match self.get_attribute(attr) {
Some(a) => a.get_payload_as_with_len::<R>(),
_ => Err(DeError::new("Failed to find specified attribute")),
}
}
}
#[cfg(test)]
mod test {
use super::*;
use crate::{
consts::{
nl::{NlmF, NlmFFlags},
socket::NlFamily,
},
nl::{NlPayload, Nlmsghdr},
socket::NlSocketHandle,
test::setup,
};
#[test]
fn test_rta_deserialize() {
setup();
let buf = &[4u8, 0, 0, 0] as &[u8];
Rtattr::<Rta, Buffer>::from_bytes(&mut Cursor::new(buf)).unwrap();
}
#[test]
fn test_rta_deserialize_err() {
setup();
let buf = &[3u8, 0, 0, 0] as &[u8];
Rtattr::<Rta, Buffer>::from_bytes(&mut Cursor::new(buf)).unwrap_err();
}
#[test]
fn test_rtattr_padding() {
setup();
let attr = Rtattr {
rta_len: 5,
rta_type: Rta::Unspec,
rta_payload: vec![0u8],
};
let mut buffer = Cursor::new(Vec::new());
let buf_res = attr.to_bytes(&mut buffer);
buf_res.unwrap();
assert_eq!(buffer.into_inner().len(), 8);
}
#[test]
fn real_test_ifinfomsg() {
setup();
let mut sock = NlSocketHandle::new(NlFamily::Route).unwrap();
sock.send(Nlmsghdr::new(
None,
Rtm::Getlink,
NlmFFlags::new(&[NlmF::Dump, NlmF::Request, NlmF::Ack]),
None,
None,
NlPayload::Payload(Ifinfomsg::new(
RtAddrFamily::Unspecified,
Arphrd::None,
0,
IffFlags::empty(),
IffFlags::empty(),
RtBuffer::new(),
)),
))
.unwrap();
let msgs = sock.recv_all::<Rtm, Ifinfomsg>().unwrap();
for msg in msgs {
let handle = msg.get_payload().unwrap().rtattrs.get_attr_handle();
handle
.get_attr_payload_as_with_len::<String>(Ifla::Ifname)
.unwrap();
assert_eq!(
handle
.get_attr_payload_as_with_len::<Vec<u8>>(Ifla::Address)
.unwrap()
.len(),
6
);
}
}
#[test]
fn real_test_tcmsg() {
setup();
let mut sock = NlSocketHandle::new(NlFamily::Route).unwrap();
sock.send(Nlmsghdr::new(
None,
Rtm::Getqdisc,
NlmFFlags::new(&[NlmF::Dump, NlmF::Request, NlmF::Ack]),
None,
None,
NlPayload::Payload(Tcmsg::new(0, 0, 0, 0, 0, RtBuffer::new())),
))
.unwrap();
let msgs = sock.recv_all::<Rtm, Tcmsg>().unwrap();
for msg in msgs {
assert!(matches!(msg.get_payload().unwrap(), Tcmsg { .. }));
assert_eq!(msg.nl_type, Rtm::Newqdisc);
}
}
}