From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001
From: Valentin Popov <valentin@popov.link>
Date: Mon, 8 Jan 2024 01:21:28 +0400
Subject: Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>
---
 .../src/backend/linux_raw/net/write_sockaddr.rs    | 60 ++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 vendor/rustix/src/backend/linux_raw/net/write_sockaddr.rs

(limited to 'vendor/rustix/src/backend/linux_raw/net/write_sockaddr.rs')

diff --git a/vendor/rustix/src/backend/linux_raw/net/write_sockaddr.rs b/vendor/rustix/src/backend/linux_raw/net/write_sockaddr.rs
new file mode 100644
index 0000000..24edd49
--- /dev/null
+++ b/vendor/rustix/src/backend/linux_raw/net/write_sockaddr.rs
@@ -0,0 +1,60 @@
+//! 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()
+}
-- 
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