From 7aaad6b7e2c04f97c1f9472dfeecea9662a35bb4 Mon Sep 17 00:00:00 2001 From: Sebastien Marie Date: Thu, 11 Apr 2024 08:43:38 +0000 Subject: [PATCH] OpenBSD fix long socket addresses Original diff from @notgull in #118349, small changes from me. on OpenBSD, getsockname(2) returns the actual size of the socket address, and not the len of the content. Figure out the length for ourselves. see https://marc.info/?l=openbsd-bugs&m=170105481926736&w=2 Fixes #116523 --- library/std/src/os/unix/net/addr.rs | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/library/std/src/os/unix/net/addr.rs b/library/std/src/os/unix/net/addr.rs index 9757653e02c06..1787eba0ef84a 100644 --- a/library/std/src/os/unix/net/addr.rs +++ b/library/std/src/os/unix/net/addr.rs @@ -107,6 +107,16 @@ impl SocketAddr { addr: libc::sockaddr_un, mut len: libc::socklen_t, ) -> io::Result { + if cfg!(target_os = "openbsd") { + // on OpenBSD, getsockname(2) returns the actual size of the socket address, + // and not the len of the content. Figure out the length for ourselves. + // https://marc.info/?l=openbsd-bugs&m=170105481926736&w=2 + let sun_path: &[u8] = + unsafe { mem::transmute::<&[libc::c_char], &[u8]>(&addr.sun_path) }; + len = core::slice::memchr::memchr(0, sun_path) + .map_or(len, |new_len| (new_len + sun_path_offset(&addr)) as libc::socklen_t); + } + if len == 0 { // When there is a datagram from unnamed unix socket // linux returns zero bytes of address