135 lines
3.3 KiB
Rust
135 lines
3.3 KiB
Rust
// SPDX-License-Identifier: MPL-2.0
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use core::num::NonZeroU8;
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use aster_bigtcp::socket::NeedIfacePoll;
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use crate::{
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net::socket::options::{
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macros::{impl_socket_options, sock_option_mut, sock_option_ref},
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SocketOption,
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},
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prelude::*,
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};
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/// IP-level socket options.
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#[derive(Debug, Clone, Copy, CopyGetters, Setters)]
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#[get_copy = "pub"]
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#[set = "pub"]
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pub(super) struct IpOptionSet {
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tos: u8,
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ttl: IpTtl,
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hdrincl: bool,
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recverr: bool,
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}
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const DEFAULT_TTL: u8 = 64;
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pub(super) const INET_ECN_MASK: u8 = 3;
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impl IpOptionSet {
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pub(super) const fn new_tcp() -> Self {
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Self {
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tos: 0,
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ttl: IpTtl(None),
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hdrincl: false,
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recverr: false,
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}
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}
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pub(super) const fn new_udp() -> Self {
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Self {
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tos: 0,
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ttl: IpTtl(None),
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hdrincl: false,
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recverr: false,
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}
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}
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pub(super) fn get_option(&self, option: &mut dyn SocketOption) -> Result<()> {
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sock_option_mut!(match option {
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ip_tos @ Tos => {
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let tos = self.tos();
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ip_tos.set(tos as _);
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}
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ip_ttl @ Ttl => {
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let ttl = self.ttl();
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ip_ttl.set(ttl);
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}
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ip_hdrincl @ Hdrincl => {
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let hdrincl = self.hdrincl();
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ip_hdrincl.set(hdrincl);
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}
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ip_recverr @ Recverr => {
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let recverr = self.recverr();
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ip_recverr.set(recverr);
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}
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_ => return_errno_with_message!(Errno::ENOPROTOOPT, "the socket option is unknown"),
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});
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Ok(())
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}
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pub(super) fn set_option(
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&mut self,
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option: &dyn SocketOption,
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socket: &dyn SetIpLevelOption,
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) -> Result<NeedIfacePoll> {
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sock_option_ref!(match option {
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ip_tos @ Tos => {
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let old_value = self.tos();
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let mut val = *ip_tos.get().unwrap() as u8;
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val &= !INET_ECN_MASK;
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val |= old_value & INET_ECN_MASK;
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self.set_tos(val);
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}
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ip_ttl @ Ttl => {
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let ttl = ip_ttl.get().unwrap();
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self.set_ttl(*ttl);
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}
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ip_hdrincl @ Hdrincl => {
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let hdrincl = ip_hdrincl.get().unwrap();
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socket.set_hdrincl(*hdrincl)?;
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self.set_hdrincl(*hdrincl);
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}
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ip_recverr @ Recverr => {
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let recverr = ip_recverr.get().unwrap();
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self.set_recverr(*recverr);
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}
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_ => return_errno_with_message!(
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Errno::ENOPROTOOPT,
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"the socket option to be set is unknown"
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),
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});
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Ok(NeedIfacePoll::FALSE)
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}
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}
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impl_socket_options!(
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pub struct Tos(i32);
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pub struct Ttl(IpTtl);
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pub struct Hdrincl(bool);
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pub struct Recverr(bool);
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);
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#[derive(Debug, Clone, Copy)]
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pub struct IpTtl(Option<NonZeroU8>);
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impl IpTtl {
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pub const fn new(val: Option<NonZeroU8>) -> Self {
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Self(val)
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}
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pub const fn get(&self) -> u8 {
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if let Some(val) = self.0 {
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val.get()
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} else {
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DEFAULT_TTL
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}
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}
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}
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pub(super) trait SetIpLevelOption {
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fn set_hdrincl(&self, _hdrincl: bool) -> Result<()>;
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}
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