X-Git-Url: https://git.archive.openwrt.org/?p=project%2Fubus.git;a=blobdiff_plain;f=ubusd.c;h=aa745504162f78c28494e349283864f7e4cbd25a;hp=798761dc7b51508463374ecd12f0b99dfbd41de8;hb=5fde74d12a7fdf4f60503780be28d7bb275abd0d;hpb=d80ebf55afcde808265e4702c162d6b40d649260

diff --git a/ubusd.c b/ubusd.c
index 798761d..aa74550 100644
--- a/ubusd.c
+++ b/ubusd.c
@@ -90,31 +90,56 @@ static int ubus_msg_writev(int fd, struct ubus_msg_buf *ub, int 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)
+void ubus_msg_send(struct ubus_client *cl, struct ubus_msg_buf *ub, bool free)
 {
 	int written;
 
-	if (cl->buf_head)
-		goto queue;
+	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;
 
-	written = ubus_msg_writev(cl->sock.fd, ub, 0);
-	if (written > 0 && written < ub->len + sizeof(ub->hdr)) {
-		cl->buf_head_ofs = written;
+		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);
-		goto queue;
 	}
+	ubus_msg_enqueue(cl, ub);
 
-	ubus_msg_free(ub);
-	return;
+out:
+	if (free)
+		ubus_msg_free(ub);
+}
 
-queue:
-	ub = ubus_msg_unshare(ub);
-	ub->next = NULL;
-	*cl->buf_tail = ub;
-	cl->buf_tail = &ub->next;
+static struct ubus_msg_buf *ubus_msg_head(struct ubus_client *cl)
+{
+	return cl->tx_queue[cl->txq_cur];
+}
+
+static void ubus_msg_dequeue(struct ubus_client *cl)
+{
+	struct ubus_msg_buf *ub = ubus_msg_head(cl);
+
+	if (!ub)
+		return;
+
+	ubus_msg_free(ub);
+	cl->txq_ofs = 0;
+	cl->tx_queue[cl->txq_cur] = NULL;
+	cl->txq_cur = (cl->txq_cur + 1) % ARRAY_SIZE(cl->tx_queue);
 }
 
 static void handle_client_disconnect(struct ubus_client *cl)
@@ -126,6 +151,9 @@ static void handle_client_disconnect(struct ubus_client *cl)
 		ubusd_free_object(obj);
 	}
 
+	while (ubus_msg_head(cl))
+		ubus_msg_dequeue(cl);
+
 	ubus_free_id(&clients, &cl->id);
 	uloop_fd_delete(&cl->sock);
 	close(cl->sock.fd);
@@ -138,11 +166,10 @@ static void client_cb(struct uloop_fd *sock, unsigned int events)
 	struct ubus_msg_buf *ub;
 
 	/* first try to tx more pending data */
-	while (cl->buf_head) {
-		struct ubus_msg_buf *ub = cl->buf_head;
+	while ((ub = ubus_msg_head(cl))) {
 		int written;
 
-		written = ubus_msg_writev(sock->fd, ub, cl->buf_head_ofs);
+		written = ubus_msg_writev(sock->fd, ub, cl->txq_ofs);
 		if (written < 0) {
 			switch(errno) {
 			case EINTR:
@@ -153,22 +180,17 @@ static void client_cb(struct uloop_fd *sock, unsigned int events)
 			}
 			break;
 		}
-		if (written == 0)
-			break;
 
-		cl->buf_head_ofs += written;
-		if (cl->buf_head_ofs < ub->len + sizeof(ub->hdr))
+		cl->txq_ofs += written;
+		if (cl->txq_ofs < ub->len + sizeof(ub->hdr))
 			break;
 
-		cl->buf_head_ofs = 0;
-		cl->buf_head = ub->next;
-		if (!cl->buf_head)
-			cl->buf_tail = &cl->buf_head;
+		ubus_msg_dequeue(cl);
 	}
 
 	/* prevent further ULOOP_WRITE events if we don't have data
 	 * to send anymore */
-	if (!cl->buf_head && (events & ULOOP_WRITE))
+	if (!ubus_msg_head(cl) && (events & ULOOP_WRITE))
 		uloop_fd_add(sock, ULOOP_READ | ULOOP_EDGE_TRIGGER);
 
 retry:
@@ -220,7 +242,7 @@ retry:
 	}
 
 out:
-	if (!sock->eof || cl->buf_head)
+	if (!sock->eof || ubus_msg_head(cl))
 		return;
 
 disconnect:
@@ -289,9 +311,20 @@ static struct uloop_fd server_fd = {
 	.cb = server_cb,
 };
 
+static int usage(const char *progname)
+{
+	fprintf(stderr, "Usage: %s [<options>]\n"
+		"Options: \n"
+		"  -s <socket>:		Set the unix domain socket to listen on\n"
+		"\n", progname);
+	return 1;
+}
+
 int main(int argc, char **argv)
 {
+	const char *ubus_socket = UBUS_UNIX_SOCKET;
 	int ret = 0;
+	int ch;
 
 	signal(SIGPIPE, SIG_IGN);
 
@@ -299,8 +332,18 @@ int main(int argc, char **argv)
 
 	uloop_init();
 
-	unlink(UBUS_UNIX_SOCKET);
-	server_fd.fd = usock(USOCK_UNIX | USOCK_SERVER | USOCK_NONBLOCK, UBUS_UNIX_SOCKET, NULL);
+	while ((ch = getopt(argc, argv, "s:")) != -1) {
+		switch (ch) {
+		case 's':
+			ubus_socket = optarg;
+			break;
+		default:
+			return usage(argv[0]);
+		}
+	}
+
+	unlink(ubus_socket);
+	server_fd.fd = usock(USOCK_UNIX | USOCK_SERVER | USOCK_NONBLOCK, ubus_socket, NULL);
 	if (server_fd.fd < 0) {
 		perror("usock");
 		ret = -1;
@@ -309,6 +352,7 @@ int main(int argc, char **argv)
 	uloop_fd_add(&server_fd, ULOOP_READ | ULOOP_EDGE_TRIGGER);
 
 	uloop_run();
+	unlink(ubus_socket);
 
 out:
 	uloop_done();