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use std::net::Ipv4Addr;
use crate::{cerr, interface::InterfaceName};
use super::RawSocket;
#[repr(C)]
struct SoTimestamping {
flags: libc::c_int,
bind_phc: libc::c_int,
}
impl RawSocket {
pub(crate) fn so_timestamping(&self, options: u32, bind_phc: u32) -> std::io::Result<()> {
// Documentation on the timestamping calls:
//
// - linux: https://www.kernel.org/doc/Documentation/networking/timestamping.txt
// - freebsd: https://man.freebsd.org/cgi/man.cgi?setsockopt
//
// SAFETY:
//
// - the socket is provided by (safe) rust, and will outlive the call
// - method is guaranteed to be a valid "name" argument
// - the options pointer outlives the call
// - the `option_len` corresponds with the options pointer
//
// Only some bits are valid to set in `options`, but setting invalid bits is
// perfectly safe
//
// > Setting other bit returns EINVAL and does not change the current state.
let tstamp_config = SoTimestamping {
flags: options as libc::c_int,
bind_phc: bind_phc as libc::c_int,
};
unsafe {
cerr(libc::setsockopt(
self.fd,
libc::SOL_SOCKET,
libc::SO_TIMESTAMPING,
&tstamp_config as *const _ as *const libc::c_void,
std::mem::size_of_val(&tstamp_config) as libc::socklen_t,
))
}?;
Ok(())
}
pub(crate) fn driver_enable_hardware_timestamping(
&self,
interface: InterfaceName,
rx_filter: libc::c_int,
) -> std::io::Result<()> {
let mut tstamp_config = libc::hwtstamp_config {
flags: 0,
tx_type: libc::HWTSTAMP_TX_ON as _,
rx_filter,
};
let mut ifreq = libc::ifreq {
ifr_name: interface.to_ifr_name(),
ifr_ifru: libc::__c_anonymous_ifr_ifru {
ifru_data: (&mut tstamp_config as *mut _) as *mut libc::c_char,
},
};
// Safety:
// ifreq lives for the duration of the call, ioctl is safe to call otherwise
cerr(unsafe { libc::ioctl(self.fd, libc::SIOCSHWTSTAMP as _, &mut ifreq) })?;
Ok(())
}
pub(crate) fn bind_to_device(&self, interface_name: InterfaceName) -> std::io::Result<()> {
let value = interface_name.as_str().as_bytes();
let len = value.len();
// Safety:
// value lives for the duration of the call, and is of size len.
// setsockopt is safe to call in all other regards
unsafe {
cerr(libc::setsockopt(
self.fd,
libc::SOL_SOCKET,
libc::SO_BINDTODEVICE,
value.as_ptr().cast(),
len as libc::socklen_t,
))?;
}
Ok(())
}
pub(crate) fn ip_multicast_if(&self, interface_name: InterfaceName) -> std::io::Result<()> {
let request = libc::ip_mreqn {
imr_multiaddr: libc::in_addr {
s_addr: u32::from_ne_bytes(Ipv4Addr::UNSPECIFIED.octets()),
},
imr_address: libc::in_addr {
s_addr: u32::from_ne_bytes(Ipv4Addr::UNSPECIFIED.octets()),
},
imr_ifindex: interface_name
.get_index()
.ok_or(std::io::ErrorKind::InvalidInput)? as _,
};
// Safety:
// request lives for the duration of the call, and we pass its size
// as option_len. setsockopt is safe to call in all other regards
cerr(unsafe {
libc::setsockopt(
self.fd,
libc::IPPROTO_IP,
libc::IP_MULTICAST_IF,
&request as *const _ as *const _,
std::mem::size_of_val(&request) as _,
)
})?;
Ok(())
}
pub(crate) fn ipv6_multicast_if(&self, interface_name: InterfaceName) -> std::io::Result<()> {
let index = interface_name
.get_index()
.ok_or(std::io::ErrorKind::InvalidInput)?;
// Safety:
// index lives for the duration of the call, and we pass its size
// as option_len. setsockopt is safe to call in all other regards
cerr(unsafe {
libc::setsockopt(
self.fd,
libc::IPPROTO_IPV6,
libc::IPV6_MULTICAST_IF,
&index as *const _ as *const _,
std::mem::size_of_val(&index) as _,
)
})?;
Ok(())
}
pub(crate) fn ip_multicast_loop(&self, enabled: bool) -> std::io::Result<()> {
let state: i32 = if enabled { 1 } else { 0 };
// Safety:
// state lives for the duration of the call, and we pass its size
// as option_len. setsockopt is safe to call in all other regards.
cerr(unsafe {
libc::setsockopt(
self.fd,
libc::IPPROTO_IP,
libc::IP_MULTICAST_LOOP,
&state as *const _ as *const _,
std::mem::size_of_val(&state) as _,
)
})?;
Ok(())
}
pub(crate) fn ipv6_multicast_loop(&self, enabled: bool) -> std::io::Result<()> {
let state: i32 = if enabled { 1 } else { 0 };
// Safety:
// state lives for the duration of the call, and we pass its size
// as option_len. setsockopt is safe to call in all other regards.
cerr(unsafe {
libc::setsockopt(
self.fd,
libc::IPPROTO_IPV6,
libc::IPV6_MULTICAST_LOOP,
&state as *const _ as *const _,
std::mem::size_of_val(&state) as _,
)
})?;
Ok(())
}
pub(crate) fn ipv6_v6only(&self, enabled: bool) -> std::io::Result<()> {
let state: i32 = if enabled { 1 } else { 0 };
// Safety:
// state lives for the duration of the call, and we pass its size
// as option_len. setsockopt is safe to call in all other regards.
cerr(unsafe {
libc::setsockopt(
self.fd,
libc::IPPROTO_IPV6,
libc::IPV6_V6ONLY,
&state as *const _ as *const _,
std::mem::size_of_val(&state) as _,
)
})?;
Ok(())
}
}