/* takes the msgbuf reference */
void ubus_msg_send(struct ubus_client *cl, struct ubus_msg_buf *ub, bool free)
{
int written;
if (!cl->tx_queue[cl->txq_cur]) {
written = ubus_msg_writev(cl->sock.fd, ub, 0);
if (written >= ub->len + sizeof(ub->hdr))
goto out;
if (written < 0)
written = 0;
cl->txq_ofs = written;
/* get an event once we can write to the socket again */
uloop_fd_add(&cl->sock, ULOOP_READ | ULOOP_WRITE | ULOOP_EDGE_TRIGGER);
}
ubus_msg_enqueue(cl, ub);
out:
if (free)
ubus_msg_free(ub);
}
static int ubus_msg_writev(int fd, struct ubus_msg_buf *ub, int offset)
{
static struct iovec iov[2];
static struct {
struct cmsghdr h;
int fd;
} fd_buf = {
.h = {
.cmsg_len = sizeof(fd_buf),
.cmsg_level = SOL_SOCKET,
.cmsg_type = SCM_RIGHTS,
},
};
struct msghdr msghdr = {
.msg_iov = iov,
.msg_iovlen = ARRAY_SIZE(iov),
.msg_control = &fd_buf,
.msg_controllen = sizeof(fd_buf),
};
fd_buf.fd = ub->fd;
if (ub->fd < 0) {
msghdr.msg_control = NULL;
msghdr.msg_controllen = 0;
}
if (offset < sizeof(ub->hdr)) {
iov[0].iov_base = ((char *) &ub->hdr) + offset;
iov[0].iov_len = sizeof(ub->hdr) - offset;
iov[1].iov_base = (char *) ub->data;
iov[1].iov_len = ub->len;
return sendmsg(fd, &msghdr, 0);
} else {
offset -= sizeof(ub->hdr);
return write(fd, ((char *) ub->data) + offset, ub->len - offset);
}
}
static void ubus_msg_enqueue(struct ubus_client *cl, struct ubus_msg_buf *ub)
{
if (cl->tx_queue[cl->txq_tail])
return;
cl->tx_queue[cl->txq_tail] = ubus_msg_ref(ub);
cl->txq_tail = (cl->txq_tail + 1) % ARRAY_SIZE(cl->tx_queue);
}
/* takes the msgbuf reference */
void ubus_msg_send(struct ubus_client *cl, struct ubus_msg_buf *ub, bool free)
{
int written;
if (!cl->tx_queue[cl->txq_cur]) {
written = ubus_msg_writev(cl->sock.fd, ub, 0);
if (written >= ub->len + sizeof(ub->hdr))
goto out;
if (written < 0)
written = 0;
cl->txq_ofs = written;
/* get an event once we can write to the socket again */
uloop_fd_add(&cl->sock, ULOOP_READ | ULOOP_WRITE | ULOOP_EDGE_TRIGGER);
}
ubus_msg_enqueue(cl, ub);
out:
if (free)
ubus_msg_free(ub);
}
