struct iovec iov = {buf, sizeof(buf)};
struct sockaddr_in6 addr;
struct msghdr msg = {.msg_name = &addr, .msg_namelen = sizeof(addr),
struct iovec iov = {buf, sizeof(buf)};
struct sockaddr_in6 addr;
struct msghdr msg = {.msg_name = &addr, .msg_namelen = sizeof(addr),