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// Take a look at the license at the top of the repository in the LICENSE file.
use std::collections::{HashMap, hash_map};
use crate::network::refresh_networks_addresses;
use crate::unix::bsd::NetworkDataInner;
use crate::{InterfaceOperationalState, MacAddr, NetworkData};
macro_rules! old_and_new {
($ty_:expr, $name:ident, $old:ident, $data:expr) => {{
$ty_.$old = $ty_.$name;
$ty_.$name = $data.$name;
}};
}
pub(crate) struct NetworksInner {
pub(crate) interfaces: HashMap<String, NetworkData>,
}
impl NetworksInner {
pub(crate) fn new() -> Self {
Self {
interfaces: HashMap::new(),
}
}
pub(crate) fn list(&self) -> &HashMap<String, NetworkData> {
&self.interfaces
}
pub(crate) fn refresh(&mut self, remove_not_listed_interfaces: bool) {
unsafe {
self.refresh_interfaces(true);
}
if remove_not_listed_interfaces {
// Remove interfaces which are gone.
self.interfaces.retain(|_, i| {
if !i.inner.updated {
return false;
}
i.inner.updated = false;
true
});
}
// FIXME: Try to find a way to call `getifaddrs` only once. Currently it's called in
// `Self::refresh_interfaces` and in `refresh_networks_addresses`.
refresh_networks_addresses(&mut self.interfaces);
}
unsafe fn refresh_interfaces(&mut self, refresh_all: bool) {
unsafe {
let Some(ifaddrs) = InterfaceAddressIterator::new() else {
sysinfo_debug!("getifaddrs failed");
return;
};
for ifa in ifaddrs {
let ifa = &*ifa;
if let Some(name) = std::ffi::CStr::from_ptr(ifa.ifa_name)
.to_str()
.ok()
.map(|s| s.to_string())
{
let flags = ifa.ifa_flags;
let data: &libc::if_data = &*(ifa.ifa_data as *mut libc::if_data);
let mtu = data.ifi_mtu;
let operational_state = InterfaceOperationalState::from_flag(
flags as core::ffi::c_int,
data.ifi_link_state,
);
match self.interfaces.entry(name) {
hash_map::Entry::Occupied(mut e) => {
let interface = e.get_mut();
let interface = &mut interface.inner;
old_and_new!(interface, ifi_ibytes, old_ifi_ibytes, data);
old_and_new!(interface, ifi_obytes, old_ifi_obytes, data);
old_and_new!(interface, ifi_ipackets, old_ifi_ipackets, data);
old_and_new!(interface, ifi_opackets, old_ifi_opackets, data);
old_and_new!(interface, ifi_ierrors, old_ifi_ierrors, data);
old_and_new!(interface, ifi_oerrors, old_ifi_oerrors, data);
interface.mtu = mtu;
interface.operational_state = operational_state;
interface.updated = true;
}
hash_map::Entry::Vacant(e) => {
if !refresh_all {
// This is simply a refresh, we don't want to add new interfaces!
continue;
}
e.insert(NetworkData {
inner: NetworkDataInner {
ifi_ibytes: data.ifi_ibytes,
old_ifi_ibytes: 0,
ifi_obytes: data.ifi_obytes,
old_ifi_obytes: 0,
ifi_ipackets: data.ifi_ipackets,
old_ifi_ipackets: 0,
ifi_opackets: data.ifi_opackets,
old_ifi_opackets: 0,
ifi_ierrors: data.ifi_ierrors,
old_ifi_ierrors: 0,
ifi_oerrors: data.ifi_oerrors,
old_ifi_oerrors: 0,
updated: true,
mac_addr: MacAddr::UNSPECIFIED,
ip_networks: vec![],
mtu,
operational_state,
},
});
}
}
}
}
}
}
}
struct InterfaceAddressIterator {
/// Pointer to the current `ifaddrs` struct.
ifap: *mut libc::ifaddrs,
/// Pointer to the first element in linked list.
buf: *mut libc::ifaddrs,
}
impl InterfaceAddressIterator {
fn new() -> Option<Self> {
let mut ifap = std::ptr::null_mut();
if unsafe { retry_eintr!(libc::getifaddrs(&mut ifap)) } == 0 && !ifap.is_null() {
Some(Self { ifap, buf: ifap })
} else {
None
}
}
}
impl Iterator for InterfaceAddressIterator {
type Item = *mut libc::ifaddrs;
fn next(&mut self) -> Option<Self::Item> {
unsafe {
while !self.ifap.is_null() {
// advance the pointer until a MAC address is found
// Safety: `ifap` is already checked as non-null in the loop condition.
let ifap = self.ifap;
let r_ifap = &*ifap;
self.ifap = r_ifap.ifa_next;
if r_ifap.ifa_addr.is_null()
|| (*r_ifap.ifa_addr).sa_family as libc::c_int != libc::AF_LINK
|| r_ifap.ifa_flags & libc::IFF_LOOPBACK as libc::c_uint != 0
{
continue;
}
return Some(ifap);
}
None
}
}
}
impl Drop for InterfaceAddressIterator {
fn drop(&mut self) {
unsafe {
libc::freeifaddrs(self.buf);
}
}
}