net: add a generic udp protocol

This commit adds a generic udp protocol framework in the
network loop. So protocol based on udp may be implemented
without modifying the network loop (for example custom
wait magic packet).

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 46 insertions, 0 deletions

diff --git a/net/udp.c b/net/udp.c
new file mode 100644
index 0000000..a93822f
--- /dev/null
+++ b/net/udp.c
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com>
+ */
+
+#include <common.h>
+#include <net.h>
+#include <net/udp.h>
+
+static struct udp_ops *udp_ops;
+
+int udp_prereq(void)
+{
+	int ret = 0;
+
+	if (udp_ops->prereq)
+		ret = udp_ops->prereq(udp_ops->data);
+
+	return ret;
+}
+
+int udp_start(void)
+{
+	return udp_ops->start(udp_ops->data);
+}
+
+int udp_loop(struct udp_ops *ops)
+{
+	int ret = -1;
+
+	if (!ops) {
+		printf("%s: ops should not be null\n", __func__);
+		goto out;
+	}
+
+	if (!ops->start) {
+		printf("%s: no start function defined\n", __func__);
+		goto out;
+	}
+
+	udp_ops = ops;
+	ret = net_loop(UDP);
+
+ out:
+	return ret;
+}