Compilation issue on Alphine version 3.2+

[monehsieh]

I encountered a compilation error on Alpine Linux version 3.2+ at line 546:

546:  struct msghdr msg = { &sa, sizeof(sa), &iov, 1, NULL, 0, 0 };

The failure is due to the changes in the struct msghdr layout. Changing the code to the following resolves the issue:

  struct msghdr msg = {
  	.msg_name = &sa,
  	.msg_namelen = sizeof(sa),
  	.msg_iov = &iov,
  	.msg_iovlen = 1,
  	.msg_control = NULL,
  	.msg_controllen = 0,
  	.msg_flags = 0
  };

Also there is a warning at line 305 related to calloc's argument order.

305:  struct endpoint *ep = (struct endpoint *) calloc(sizeof(*ep), 1);

Swapping the argument order removes the warning:

  struct endpoint *ep = (struct endpoint *) calloc(1, sizeof(*ep));

thanks