net: Initial commit for the new IP stack

This is a placeholder that compiles but does nothing else.

Change-Id: I9689fa26eb13bc23d29940938f7b3c11f32b2ff1
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>

include/net/net_core.h

@@ -14,4 +14,8 @@
  * limitations under the License.
  */
 
+#if defined(CONFIG_NET_YAIP)
+#include <net/yaip/net_core.h>
+#else
 #include <net/uip/net_core.h>
+#endif

include/net/net_ip.h

@@ -14,4 +14,8 @@
  * limitations under the License.
  */
 
+#if defined(CONFIG_NET_YAIP)
+#include <net/yaip/net_ip.h>
+#else
 #include <net/uip/net_ip.h>
+#endif

include/net/net_socket.h

@@ -14,4 +14,8 @@
  * limitations under the License.
  */
 
+#if defined(CONFIG_NET_YAIP)
+#include <net/yaip/net_socket.h>
+#else
 #include <net/uip/net_socket.h>
+#endif

net/ip/Kconfig

@@ -41,6 +41,11 @@ config NET_UIP
 	bool "uIP"
 	help
 	  Choose this if unsure.
+
+config NET_YAIP
+	bool "New IP stack [EXPERIMENTAL]"
+	help
+	  New IP stack.
 endchoice
 
 if NETWORKING && NET_UIP
@@ -604,6 +609,10 @@ endif
 
 if NETWORKING
 
+if NET_YAIP
+source "net/yaip/Kconfig"
+endif
+
 source "net/ip/Kconfig.debug"
 
 endif

net/yaip/Kconfig

@@ -0,0 +1,17 @@
+# Kconfig.yaip - Yet another IP stack config
+
+#
+# Copyright (c) 2016 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#

net/yaip/Makefile

@@ -0,0 +1,2 @@
+ccflags-y += -I${srctree}/net/ip
+obj-y = net_core.o

net/yaip/net_core.c

@@ -0,0 +1,76 @@
+/** @file
+ * @brief Network initialization
+ *
+ * Initialize the network IP stack. Create two fibers, one for reading data
+ * from applications (Tx fiber) and one for reading data from IP stack
+ * and passing that data to applications (Rx fiber).
+ */
+
+/*
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef CONFIG_NETWORKING_WITH_LOGGING
+#define DEBUG 1
+#endif
+
+#include <nanokernel.h>
+#include <toolchain.h>
+#include <sections.h>
+#include <string.h>
+#include <errno.h>
+
+/* Stacks for the rx fiber.
+ */
+#if !defined(CONFIG_NET_RX_STACK_SIZE)
+#define CONFIG_NET_RX_STACK_SIZE 1024
+#endif
+static char __noinit __stack rx_fiber_stack[CONFIG_IP_RX_STACK_SIZE];
+static struct nano_fifo rx_queue;
+
+static void net_rx_fiber(int unused1, int unused2)
+{
+	while (0) {
+		/* FIXME - implementation missing */
+	}
+}
+
+static void init_rx_queue(void)
+{
+	nano_fifo_init(&rx_queue);
+
+	fiber_start(rx_fiber_stack, sizeof(rx_fiber_stack),
+		    net_rx_fiber, 0, 0, 7, 0);
+}
+
+static int network_initialization(void)
+{
+
+	return 0;
+}
+
+int net_init(void)
+{
+	static uint8_t initialized;
+
+	if (initialized)
+		return -EALREADY;
+
+	initialized = 1;
+
+	init_rx_queue();
+
+	return network_initialization();
+}