Add ip level socket option

kernel/src/util/net/options/ip.rs

@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: MPL-2.0
+
+use int_to_c_enum::TryFromInt;
+
+use super::RawSocketOption;
+use crate::{
+    impl_raw_socket_option,
+    net::socket::ip::options::{Hdrincl, Tos, Ttl},
+    prelude::*,
+    util::net::options::SocketOption,
+};
+
+/// Socket options for IP socket.
+///
+/// The raw definitions can be found at:
+/// https://elixir.bootlin.com/linux/v6.0.19/source/include/uapi/linux/in.h#L94
+#[repr(i32)]
+#[derive(Debug, Clone, Copy, TryFromInt)]
+#[expect(non_camel_case_types)]
+#[expect(clippy::upper_case_acronyms)]
+pub enum CIpOptionName {
+    TOS = 1,
+    TTL = 2,
+    HDRINCL = 3,
+    OPTIONS = 4,
+    ROUTER_ALERT = 5,
+    RECVOPTS = 6,
+    RETOPTS = 7,
+    PKTINFO = 8,
+    PKTOPTIONS = 9,
+    MTU_DISCOVER = 10,
+    RECVERR = 11,
+    RECVTTL = 12,
+    RECVTOS = 13,
+    MTU = 14,
+    FREEBIND = 15,
+    IPSEC_POLICY = 16,
+    XFRM_POLICY = 17,
+    PASSSEC = 18,
+    TRANSPARENT = 19,
+    ORIGDSTADDR = 20,
+    MINTTL = 21,
+    NODEFRAG = 22,
+    CHECKSUM = 23,
+    BIND_ADDRESS_NO_PORT = 24,
+    RECVFRAGSIZE = 25,
+    RECVERR_RFC4884 = 26,
+    MULTICAST_IF = 32,
+    MULTICAST_TTL = 33,
+    MULTICAST_LOOP = 34,
+    ADD_MEMBERSHIP = 35,
+    DROP_MEMBERSHIP = 36,
+    UNBLOCK_SOURCE = 37,
+    BLOCK_SOURCE = 38,
+    ADD_SOURCE_MEMBERSHIP = 39,
+    DROP_SOURCE_MEMBERSHIP = 40,
+    MSFILTER = 41,
+    MCAST_JOIN_GROUP = 42,
+    MCAST_BLOCK_SOURCE = 43,
+    MCAST_UNBLOCK_SOURCE = 44,
+    MCAST_LEAVE_GROUP = 45,
+    MCAST_JOIN_SOURCE_GROUP = 46,
+    MCAST_LEAVE_SOURCE_GROUP = 47,
+    MCAST_MSFILTER = 48,
+    MULTICAST_ALL = 49,
+    UNICAST_IF = 50,
+}
+
+pub fn new_ip_option(name: i32) -> Result<Box<dyn RawSocketOption>> {
+    let name = CIpOptionName::try_from(name).map_err(|_| Errno::ENOPROTOOPT)?;
+    match name {
+        CIpOptionName::TOS => Ok(Box::new(Tos::new())),
+        CIpOptionName::TTL => Ok(Box::new(Ttl::new())),
+        CIpOptionName::HDRINCL => Ok(Box::new(Hdrincl::new())),
+        _ => return_errno_with_message!(Errno::ENOPROTOOPT, "unsupported ip level option"),
+    }
+}
+
+impl_raw_socket_option!(Ttl);
+impl_raw_socket_option!(Tos);
+impl_raw_socket_option!(Hdrincl);