| //! The BSD sockets API requires us to read the `ss_family` field before we can |
| //! interpret the rest of a `sockaddr` produced by the kernel. |
| #![allow(unsafe_code)] |
| |
| use crate::backend::c; |
| use crate::net::{SocketAddrAny, SocketAddrStorage, SocketAddrUnix, SocketAddrV4, SocketAddrV6}; |
| use core::mem::size_of; |
| |
| pub(crate) unsafe fn write_sockaddr( |
| addr: &SocketAddrAny, |
| storage: *mut SocketAddrStorage, |
| ) -> usize { |
| match addr { |
| SocketAddrAny::V4(v4) => write_sockaddr_v4(v4, storage), |
| SocketAddrAny::V6(v6) => write_sockaddr_v6(v6, storage), |
| SocketAddrAny::Unix(unix) => write_sockaddr_unix(unix, storage), |
| } |
| } |
| |
| pub(crate) fn encode_sockaddr_v4(v4: &SocketAddrV4) -> c::sockaddr_in { |
| c::sockaddr_in { |
| sin_family: c::AF_INET as _, |
| sin_port: u16::to_be(v4.port()), |
| sin_addr: c::in_addr { |
| s_addr: u32::from_ne_bytes(v4.ip().octets()), |
| }, |
| __pad: [0_u8; 8], |
| } |
| } |
| |
| unsafe fn write_sockaddr_v4(v4: &SocketAddrV4, storage: *mut SocketAddrStorage) -> usize { |
| let encoded = encode_sockaddr_v4(v4); |
| core::ptr::write(storage.cast(), encoded); |
| size_of::<c::sockaddr_in>() |
| } |
| |
| pub(crate) fn encode_sockaddr_v6(v6: &SocketAddrV6) -> c::sockaddr_in6 { |
| c::sockaddr_in6 { |
| sin6_family: c::AF_INET6 as _, |
| sin6_port: u16::to_be(v6.port()), |
| sin6_flowinfo: u32::to_be(v6.flowinfo()), |
| sin6_addr: c::in6_addr { |
| in6_u: linux_raw_sys::net::in6_addr__bindgen_ty_1 { |
| u6_addr8: v6.ip().octets(), |
| }, |
| }, |
| sin6_scope_id: v6.scope_id(), |
| } |
| } |
| |
| unsafe fn write_sockaddr_v6(v6: &SocketAddrV6, storage: *mut SocketAddrStorage) -> usize { |
| let encoded = encode_sockaddr_v6(v6); |
| core::ptr::write(storage.cast(), encoded); |
| size_of::<c::sockaddr_in6>() |
| } |
| |
| unsafe fn write_sockaddr_unix(unix: &SocketAddrUnix, storage: *mut SocketAddrStorage) -> usize { |
| core::ptr::write(storage.cast(), unix.unix); |
| unix.len() |
| } |