text: // Copyright (c) 2016 Nuxi, https://nuxi.nl/
  //
  // SPDX-License-Identifier: BSD-2-Clause
  
  #include <sys/socket.h>
  
  #include "socket_impl.h"
  
  struct cmsghdr *CMSG_FIRSTHDR(const struct msghdr *mhdr) {
    return CMSG_GET(mhdr, mhdr->msg_control);
  }
  