1 files changed, 23 insertions, 0 deletions
diff --git a/third_party/rust/audioipc2/src/sys/unix/cmsghdr.c b/third_party/rust/audioipc2/src/sys/unix/cmsghdr.c
new file mode 100644
index 0000000000..82d7852867
--- /dev/null
+++ b/third_party/rust/audioipc2/src/sys/unix/cmsghdr.c
@@ -0,0 +1,23 @@
+#include <sys/socket.h>
+#include <inttypes.h>
+#include <string.h>
+
+const uint8_t*
+cmsghdr_bytes(size_t* size)
+{
+  int myfd = 0;
+
+  static union {
+    uint8_t buf[CMSG_SPACE(sizeof(myfd))];
+    struct cmsghdr align;
+  } u;
+
+  u.align.cmsg_len = CMSG_LEN(sizeof(myfd));
+  u.align.cmsg_level = SOL_SOCKET;
+  u.align.cmsg_type = SCM_RIGHTS;
+
+  memcpy(CMSG_DATA(&u.align), &myfd, sizeof(myfd));
+
+  *size = sizeof(u);
+  return (const uint8_t*)&u.buf;
+}