sendtofrom
ssize_t sendtofrom(int, void *, size_t, int, struct sockaddr *,
ssize_t sendtofrom(int, void *, size_t, int, struct sockaddr *,
if (sendtofrom(sa->sa_fd, &marker, sizeof(marker), 0,
if (sendtofrom(m->msg_fd, ibuf_data(m->msg_data),
if (sendtofrom(msg->msg_fd, ibuf_data(msg->msg_data),
if (sendtofrom(msg->msg_fd, ibuf_data(buf), ibuf_size(buf), 0,
ssize_t sendtofrom(int, void *, size_t, int, struct sockaddr *,
len = sendtofrom(msg->sm_sock, ptr, len, 0,