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use crate::data_type::DataType;
use crate::nlmsg::{NfNetlinkObject, NfNetlinkWriter};
use crate::parser::{parse_nlmsg, NlMsg};
use crate::set::{Set, SetBuilder};
use crate::{sys::*, Chain, MsgType, ProtocolFamily, Rule, Table};
mod batch;
mod chain;
mod expr;
mod rule;
mod set;
mod table;
pub const TABLE_NAME: &'static str = "mocktable";
pub const CHAIN_NAME: &'static str = "mockchain";
pub const SET_NAME: &'static str = "mockset";
pub const TABLE_USERDATA: &'static str = "mocktabledata";
pub const CHAIN_USERDATA: &'static str = "mockchaindata";
pub const RULE_USERDATA: &'static str = "mockruledata";
pub const SET_USERDATA: &'static str = "mocksetdata";
pub const SET_ID: u32 = 123456;
type NetLinkType = u16;
#[derive(Debug, thiserror::Error)]
#[error("empty data")]
pub struct EmptyDataError;
#[derive(Debug, Clone, Eq, Ord)]
pub enum NetlinkExpr {
Nested(NetLinkType, Vec<NetlinkExpr>),
Final(NetLinkType, Vec<u8>),
List(Vec<NetlinkExpr>),
}
impl NetlinkExpr {
pub fn to_raw(self) -> Vec<u8> {
match self.sort() {
NetlinkExpr::Final(ty, val) => {
let len = val.len() + 4;
let mut res = Vec::with_capacity(len);
res.extend(&(len as u16).to_le_bytes());
res.extend(&ty.to_le_bytes());
res.extend(val);
// alignment
while res.len() % 4 != 0 {
res.push(0);
}
res
}
NetlinkExpr::Nested(ty, exprs) => {
// some heuristic to decrease allocations (even though this is
// only useful for testing so performance is not an objective)
let mut sub = Vec::with_capacity(exprs.len() * 50);
for expr in exprs {
sub.append(&mut expr.to_raw());
}
let len = sub.len() + 4;
let mut res = Vec::with_capacity(len);
// set the "NESTED" flag
res.extend(&(len as u16).to_le_bytes());
res.extend(&(ty | NLA_F_NESTED as u16).to_le_bytes());
res.extend(sub);
res
}
NetlinkExpr::List(exprs) => {
// some heuristic to decrease allocations (even though this is
// only useful for testing so performance is not an objective)
let mut list = Vec::with_capacity(exprs.len() * 50);
for expr in exprs {
list.append(&mut expr.to_raw());
}
list
}
}
}
pub fn sort(self) -> Self {
match self {
NetlinkExpr::Final(_, _) => self,
NetlinkExpr::Nested(ty, mut exprs) => {
exprs.sort();
NetlinkExpr::Nested(ty, exprs)
}
NetlinkExpr::List(mut exprs) => {
exprs.sort();
NetlinkExpr::List(exprs)
}
}
}
}
impl PartialEq for NetlinkExpr {
fn eq(&self, other: &Self) -> bool {
match (self.clone().sort(), other.clone().sort()) {
(NetlinkExpr::Nested(k1, v1), NetlinkExpr::Nested(k2, v2)) => k1 == k2 && v1 == v2,
(NetlinkExpr::Final(k1, v1), NetlinkExpr::Final(k2, v2)) => k1 == k2 && v1 == v2,
(NetlinkExpr::List(v1), NetlinkExpr::List(v2)) => v1 == v2,
_ => false,
}
}
}
impl PartialOrd for NetlinkExpr {
fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
match (self, other) {
(
NetlinkExpr::Nested(k1, _) | NetlinkExpr::Final(k1, _),
NetlinkExpr::Nested(k2, _) | NetlinkExpr::Final(k2, _),
) => k1.partial_cmp(k2),
(NetlinkExpr::List(v1), NetlinkExpr::List(v2)) => v1.partial_cmp(v2),
(_, NetlinkExpr::List(_)) => Some(std::cmp::Ordering::Less),
(NetlinkExpr::List(_), _) => Some(std::cmp::Ordering::Greater),
}
}
}
pub fn get_test_table() -> Table {
Table::new(ProtocolFamily::Inet)
.with_name(TABLE_NAME)
.with_flags(0u32)
}
pub fn get_test_table_raw_expr() -> NetlinkExpr {
NetlinkExpr::List(vec![
NetlinkExpr::Final(NFTA_TABLE_FLAGS, 0u32.to_be_bytes().to_vec()),
NetlinkExpr::Final(NFTA_TABLE_NAME, TABLE_NAME.as_bytes().to_vec()),
])
.sort()
}
pub fn get_test_table_with_userdata_raw_expr() -> NetlinkExpr {
NetlinkExpr::List(vec![
NetlinkExpr::Final(NFTA_TABLE_FLAGS, 0u32.to_be_bytes().to_vec()),
NetlinkExpr::Final(NFTA_TABLE_NAME, TABLE_NAME.as_bytes().to_vec()),
NetlinkExpr::Final(NFTA_TABLE_USERDATA, TABLE_USERDATA.as_bytes().to_vec()),
])
.sort()
}
pub fn get_test_chain() -> Chain {
Chain::new(&get_test_table()).with_name(CHAIN_NAME)
}
pub fn get_test_rule() -> Rule {
Rule::new(&get_test_chain()).unwrap()
}
pub fn get_test_set<K: DataType>() -> Set {
SetBuilder::<K>::new(SET_NAME, SET_ID, &get_test_table())
.expect("Couldn't create a set")
.finish()
.0
.with_userdata(SET_USERDATA)
}
pub fn get_test_nlmsg_with_msg_type<'a>(
buf: &'a mut Vec<u8>,
obj: &mut impl NfNetlinkObject,
msg_type: MsgType,
) -> (nlmsghdr, nfgenmsg, &'a [u8]) {
let mut writer = NfNetlinkWriter::new(buf);
obj.add_or_remove(&mut writer, msg_type, 0);
let (hdr, msg) = parse_nlmsg(buf.as_slice()).expect("Couldn't parse the message");
let (nfgenmsg, raw_value) = match msg {
NlMsg::NfGenMsg(nfgenmsg, raw_value) => (nfgenmsg, raw_value),
_ => panic!("Invalid return value type, expected a valid message"),
};
// sanity checks on the global message (this should be very similar/factorisable for the
// most part in other tests)
// TODO: check the messages flags
assert_eq!(nfgenmsg.res_id.to_be(), 0);
(hdr, nfgenmsg, raw_value)
}
pub fn get_test_nlmsg<'a>(
buf: &'a mut Vec<u8>,
obj: &mut impl NfNetlinkObject,
) -> (nlmsghdr, nfgenmsg, &'a [u8]) {
get_test_nlmsg_with_msg_type(buf, obj, MsgType::Add)
}
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