net: slip: Add slip driver for testing purposes

This slip driver is needed for sending packets outside of qemu.

Change-Id: Ifc37181094ddebce08d97ae889f3a58c03d01ae1
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>

net/ip/Makefile

@@ -102,7 +102,8 @@ ifeq ($(CONFIG_NETWORKING_WITH_15_4),)
 endif
 
 obj-$(CONFIG_NETWORKING_UART) += contiki/os/dev/slip.o \
-				contiki/os/dev/slip-arch.o
+				contiki/os/dev/slip-arch.o \
+				net_driver_slip.o
 
 # workaround for include file location
 CREATE_INCLUDE_LINK_net := $(shell ln -s ${ZEPHYR_BASE}/net/ip/contiki ${ZEPHYR_BASE}/net/ip/contiki/net > /dev/null 2>&1)

net/ip/net_driver_slip.c

@@ -0,0 +1,76 @@
+/* net_driver_slip.c - Slip (serial line IP) driver */
+
+/*
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1) Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2) Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * 3) Neither the name of Intel Corporation nor the names of its contributors
+ * may be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <nanokernel.h>
+#include <toolchain.h>
+#include <string.h>
+#include <errno.h>
+
+#if defined(CONFIG_STDOUT_CONSOLE)
+#include <stdio.h>
+#define PRINT           printf
+#else
+#include <misc/printk.h>
+#define PRINT           printk
+#endif
+
+#include <net/net_core.h>
+#include <net/net_buf.h>
+
+#include "contiki/os/dev/slip.h"
+
+static int net_driver_slip_open(void)
+{
+	NET_DBG("Initialized slip driver\n");
+
+	return 0;
+}
+
+static int net_driver_slip_send(struct net_buf *buf)
+{
+	NET_DBG("Sending %d bytes\n", buf->len);
+
+	return slip_send(buf);
+}
+
+static struct net_driver net_driver_slip = {
+	.head_reserve = 0,
+	.open = net_driver_slip_open,
+	.send = net_driver_slip_send,
+};
+
+int net_driver_slip_init(void)
+{
+	net_register_driver(&net_driver_slip);
+
+	return 0;
+}

net/ip/net_driver_slip.h

@@ -0,0 +1,6 @@
+
+#ifdef CONFIG_NETWORKING_UART
+int net_driver_slip_init(void);
+#else
+#define net_driver_slip_init()
+#endif

net/ip/net_init.c

@@ -51,6 +51,7 @@
 #include <net/net_socket.h>
 
 #include "net_driver_15_4.h"
+#include "net_driver_slip.h"
 
 #include "contiki/os/sys/process.h"
 #include "contiki/os/sys/etimer.h"
@@ -615,5 +616,7 @@ int net_init(void)
 	net_driver_15_4_init();
 #endif
 
+	net_driver_slip_init();
+
 	return network_initialization();
 }